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b30f223b | 1 | /* Subroutines shared by all languages that are variants of C. |
5624e564 | 2 | Copyright (C) 1992-2015 Free Software Foundation, Inc. |
b30f223b | 3 | |
1322177d | 4 | This file is part of GCC. |
b30f223b | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
b30f223b | 10 | |
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
b30f223b RS |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
b30f223b | 19 | |
40e23961 MC |
20 | #define GCC_C_COMMON_C |
21 | ||
b30f223b | 22 | #include "config.h" |
670ee920 | 23 | #include "system.h" |
4977bab6 | 24 | #include "coretypes.h" |
b559c810 | 25 | #include "c-common.h" |
4977bab6 | 26 | #include "tm.h" |
d9b2742a | 27 | #include "intl.h" |
b30f223b | 28 | #include "tree.h" |
d8a2d370 DN |
29 | #include "fold-const.h" |
30 | #include "stor-layout.h" | |
31 | #include "calls.h" | |
32 | #include "stringpool.h" | |
33 | #include "attribs.h" | |
34 | #include "varasm.h" | |
35 | #include "trans-mem.h" | |
b30f223b | 36 | #include "flags.h" |
e2af664c | 37 | #include "c-pragma.h" |
61d3ce20 | 38 | #include "c-objc.h" |
7bdb32b9 | 39 | #include "tm_p.h" |
235cfbc4 | 40 | #include "obstack.h" |
c8724862 | 41 | #include "cpplib.h" |
12a68f1f | 42 | #include "target.h" |
677f3fa8 | 43 | #include "common/common-target.h" |
7afff7cf | 44 | #include "langhooks.h" |
d57a4b98 | 45 | #include "tree-inline.h" |
5f1989e6 | 46 | #include "toplev.h" |
148e4216 | 47 | #include "diagnostic.h" |
6de9cd9a | 48 | #include "tree-iterator.h" |
d974312d | 49 | #include "opts.h" |
c582198b | 50 | #include "hard-reg-set.h" |
c582198b | 51 | #include "function.h" |
ce91e74c | 52 | #include "cgraph.h" |
45b0be94 | 53 | #include "gimplify.h" |
807e902e | 54 | #include "wide-int-print.h" |
aa7da51a | 55 | #include "gimple-expr.h" |
cb60f38d | 56 | |
81a75f0f | 57 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
c8724862 | 58 | |
8fba1830 BRF |
59 | /* Mode used to build pointers (VOIDmode means ptr_mode). */ |
60 | ||
61 | machine_mode c_default_pointer_mode = VOIDmode; | |
62 | ||
7f4edbcb | 63 | /* The following symbols are subsumed in the c_global_trees array, and |
d125d268 | 64 | listed here individually for documentation purposes. |
7f4edbcb BS |
65 | |
66 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
67 | ||
68 | tree short_integer_type_node; | |
69 | tree long_integer_type_node; | |
70 | tree long_long_integer_type_node; | |
71 | ||
72 | tree short_unsigned_type_node; | |
73 | tree long_unsigned_type_node; | |
74 | tree long_long_unsigned_type_node; | |
75 | ||
de7df9eb JM |
76 | tree truthvalue_type_node; |
77 | tree truthvalue_false_node; | |
78 | tree truthvalue_true_node; | |
7f4edbcb BS |
79 | |
80 | tree ptrdiff_type_node; | |
81 | ||
82 | tree unsigned_char_type_node; | |
83 | tree signed_char_type_node; | |
84 | tree wchar_type_node; | |
7f4edbcb | 85 | |
b6baa67d KVH |
86 | tree char16_type_node; |
87 | tree char32_type_node; | |
88 | ||
7f4edbcb BS |
89 | tree float_type_node; |
90 | tree double_type_node; | |
91 | tree long_double_type_node; | |
92 | ||
93 | tree complex_integer_type_node; | |
94 | tree complex_float_type_node; | |
95 | tree complex_double_type_node; | |
96 | tree complex_long_double_type_node; | |
97 | ||
9a8ce21f JG |
98 | tree dfloat32_type_node; |
99 | tree dfloat64_type_node; | |
100 | tree_dfloat128_type_node; | |
101 | ||
7f4edbcb BS |
102 | tree intQI_type_node; |
103 | tree intHI_type_node; | |
104 | tree intSI_type_node; | |
105 | tree intDI_type_node; | |
106 | tree intTI_type_node; | |
107 | ||
108 | tree unsigned_intQI_type_node; | |
109 | tree unsigned_intHI_type_node; | |
110 | tree unsigned_intSI_type_node; | |
111 | tree unsigned_intDI_type_node; | |
112 | tree unsigned_intTI_type_node; | |
113 | ||
114 | tree widest_integer_literal_type_node; | |
115 | tree widest_unsigned_literal_type_node; | |
116 | ||
117 | Nodes for types `void *' and `const void *'. | |
118 | ||
119 | tree ptr_type_node, const_ptr_type_node; | |
120 | ||
121 | Nodes for types `char *' and `const char *'. | |
122 | ||
123 | tree string_type_node, const_string_type_node; | |
124 | ||
125 | Type `char[SOMENUMBER]'. | |
126 | Used when an array of char is needed and the size is irrelevant. | |
127 | ||
128 | tree char_array_type_node; | |
129 | ||
7f4edbcb BS |
130 | Type `wchar_t[SOMENUMBER]' or something like it. |
131 | Used when a wide string literal is created. | |
132 | ||
133 | tree wchar_array_type_node; | |
134 | ||
b6baa67d KVH |
135 | Type `char16_t[SOMENUMBER]' or something like it. |
136 | Used when a UTF-16 string literal is created. | |
137 | ||
138 | tree char16_array_type_node; | |
139 | ||
140 | Type `char32_t[SOMENUMBER]' or something like it. | |
141 | Used when a UTF-32 string literal is created. | |
142 | ||
143 | tree char32_array_type_node; | |
144 | ||
7f4edbcb BS |
145 | Type `int ()' -- used for implicit declaration of functions. |
146 | ||
147 | tree default_function_type; | |
148 | ||
7f4edbcb BS |
149 | A VOID_TYPE node, packaged in a TREE_LIST. |
150 | ||
151 | tree void_list_node; | |
152 | ||
684d9f3b | 153 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
0ba8a114 NS |
154 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
155 | VAR_DECLS, but C++ does.) | |
63ad61ed | 156 | |
0ba8a114 | 157 | tree function_name_decl_node; |
684d9f3b | 158 | tree pretty_function_name_decl_node; |
0ba8a114 NS |
159 | tree c99_function_name_decl_node; |
160 | ||
161 | Stack of nested function name VAR_DECLs. | |
35b1a6fa | 162 | |
0ba8a114 | 163 | tree saved_function_name_decls; |
63ad61ed | 164 | |
7f4edbcb BS |
165 | */ |
166 | ||
167 | tree c_global_trees[CTI_MAX]; | |
17211ab5 | 168 | \f |
4078b403 NB |
169 | /* Switches common to the C front ends. */ |
170 | ||
63973df3 NB |
171 | /* Nonzero means don't output line number information. */ |
172 | ||
173 | char flag_no_line_commands; | |
174 | ||
175 | /* Nonzero causes -E output not to be done, but directives such as | |
176 | #define that have side effects are still obeyed. */ | |
177 | ||
178 | char flag_no_output; | |
179 | ||
180 | /* Nonzero means dump macros in some fashion. */ | |
181 | ||
182 | char flag_dump_macros; | |
183 | ||
184 | /* Nonzero means pass #include lines through to the output. */ | |
185 | ||
186 | char flag_dump_includes; | |
187 | ||
c0d578e6 GK |
188 | /* Nonzero means process PCH files while preprocessing. */ |
189 | ||
190 | bool flag_pch_preprocess; | |
191 | ||
17211ab5 GK |
192 | /* The file name to which we should write a precompiled header, or |
193 | NULL if no header will be written in this compile. */ | |
194 | ||
195 | const char *pch_file; | |
196 | ||
3df89291 NB |
197 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
198 | user's namespace. */ | |
199 | int flag_iso; | |
200 | ||
4078b403 NB |
201 | /* C/ObjC language option variables. */ |
202 | ||
203 | ||
4078b403 NB |
204 | /* Nonzero means allow type mismatches in conditional expressions; |
205 | just make their values `void'. */ | |
206 | ||
207 | int flag_cond_mismatch; | |
208 | ||
209 | /* Nonzero means enable C89 Amendment 1 features. */ | |
210 | ||
211 | int flag_isoc94; | |
212 | ||
48b0b196 | 213 | /* Nonzero means use the ISO C99 (or C11) dialect of C. */ |
4078b403 NB |
214 | |
215 | int flag_isoc99; | |
216 | ||
48b0b196 | 217 | /* Nonzero means use the ISO C11 dialect of C. */ |
2778d766 | 218 | |
48b0b196 | 219 | int flag_isoc11; |
2778d766 | 220 | |
6614fd40 | 221 | /* Nonzero means that we have builtin functions, and main is an int. */ |
4078b403 NB |
222 | |
223 | int flag_hosted = 1; | |
224 | ||
4078b403 NB |
225 | |
226 | /* ObjC language option variables. */ | |
227 | ||
228 | ||
4078b403 NB |
229 | /* Tells the compiler that this is a special run. Do not perform any |
230 | compiling, instead we are to test some platform dependent features | |
231 | and output a C header file with appropriate definitions. */ | |
232 | ||
233 | int print_struct_values; | |
234 | ||
fa10beec | 235 | /* Tells the compiler what is the constant string class for ObjC. */ |
4078b403 NB |
236 | |
237 | const char *constant_string_class_name; | |
238 | ||
4078b403 NB |
239 | |
240 | /* C++ language option variables. */ | |
241 | ||
242 | ||
4078b403 NB |
243 | /* Nonzero means generate separate instantiation control files and |
244 | juggle them at link time. */ | |
245 | ||
246 | int flag_use_repository; | |
247 | ||
129211bc | 248 | /* The C++ dialect being used. Default set in c_common_post_options. */ |
966541e3 | 249 | |
129211bc | 250 | enum cxx_dialect cxx_dialect = cxx_unset; |
966541e3 | 251 | |
4afe7ad7 | 252 | /* Maximum template instantiation depth. This limit exists to limit the |
3ff60975 | 253 | time it takes to notice excessively recursive template instantiations. |
4078b403 | 254 | |
3ff60975 JM |
255 | The default is lower than the 1024 recommended by the C++0x standard |
256 | because G++ runs out of stack before 1024 with highly recursive template | |
257 | argument deduction substitution (g++.dg/cpp0x/enum11.C). */ | |
258 | ||
259 | int max_tinst_depth = 900; | |
4078b403 | 260 | |
f09f1de5 MM |
261 | /* The elements of `ridpointers' are identifier nodes for the reserved |
262 | type names and storage classes. It is indexed by a RID_... value. */ | |
263 | tree *ridpointers; | |
264 | ||
c2255bc4 | 265 | tree (*make_fname_decl) (location_t, tree, int); |
2ce07e2d | 266 | |
7d882b83 ILT |
267 | /* Nonzero means don't warn about problems that occur when the code is |
268 | executed. */ | |
269 | int c_inhibit_evaluation_warnings; | |
e78a3b42 | 270 | |
5386338c JM |
271 | /* Whether we are building a boolean conversion inside |
272 | convert_for_assignment, or some other late binary operation. If | |
273 | build_binary_op is called for C (from code shared by C and C++) in | |
274 | this case, then the operands have already been folded and the | |
275 | result will not be folded again, so C_MAYBE_CONST_EXPR should not | |
276 | be generated. */ | |
277 | bool in_late_binary_op; | |
278 | ||
148e4216 JM |
279 | /* Whether lexing has been completed, so subsequent preprocessor |
280 | errors should use the compiler's input_location. */ | |
281 | bool done_lexing = false; | |
282 | ||
ec5c56db | 283 | /* Information about how a function name is generated. */ |
0ba8a114 NS |
284 | struct fname_var_t |
285 | { | |
8b60264b KG |
286 | tree *const decl; /* pointer to the VAR_DECL. */ |
287 | const unsigned rid; /* RID number for the identifier. */ | |
288 | const int pretty; /* How pretty is it? */ | |
0ba8a114 NS |
289 | }; |
290 | ||
ec5c56db | 291 | /* The three ways of getting then name of the current function. */ |
0ba8a114 NS |
292 | |
293 | const struct fname_var_t fname_vars[] = | |
294 | { | |
ec5c56db | 295 | /* C99 compliant __func__, must be first. */ |
0ba8a114 | 296 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
ec5c56db | 297 | /* GCC __FUNCTION__ compliant. */ |
0ba8a114 | 298 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
ec5c56db | 299 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
0ba8a114 NS |
300 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
301 | {NULL, 0, 0}, | |
302 | }; | |
303 | ||
c98cd5bf JM |
304 | /* Global visibility options. */ |
305 | struct visibility_flags visibility_options; | |
306 | ||
3aa3c9fc | 307 | static tree c_fully_fold_internal (tree expr, bool, bool *, bool *, bool); |
62e4eb35 | 308 | static tree check_case_value (location_t, tree); |
b155cfd9 MP |
309 | static bool check_case_bounds (location_t, tree, tree, tree *, tree *, |
310 | bool *); | |
4724b3de | 311 | |
35b1a6fa AJ |
312 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
313 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
314 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
315 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
52bf96d2 JH |
316 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
317 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
e664c61c KS |
318 | static tree handle_no_sanitize_address_attribute (tree *, tree, tree, |
319 | int, bool *); | |
77bc5132 JJ |
320 | static tree handle_no_address_safety_analysis_attribute (tree *, tree, tree, |
321 | int, bool *); | |
ce6923c5 MP |
322 | static tree handle_no_sanitize_undefined_attribute (tree *, tree, tree, int, |
323 | bool *); | |
5434dc07 | 324 | static tree handle_stack_protect_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa | 325 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
86631ea3 | 326 | static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); |
185c9e56 | 327 | static tree handle_noicf_attribute (tree *, tree, tree, int, bool *); |
46a4da10 | 328 | static tree handle_leaf_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
329 | static tree handle_always_inline_attribute (tree *, tree, tree, int, |
330 | bool *); | |
d752cfdb JJ |
331 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
332 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0691d1d4 | 333 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
d2af6a68 | 334 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
335 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
336 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
ce91e74c JH |
337 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
338 | bool *); | |
7861b648 AK |
339 | static tree handle_no_reorder_attribute (tree *, tree, tree, int, |
340 | bool *); | |
35b1a6fa AJ |
341 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
342 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
343 | int, bool *); | |
344 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
345 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
346 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
347 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
348 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
349 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
4bb794e2 | 350 | static tree handle_noplt_attribute (tree *, tree, tree, int, bool *) ; |
ba885ec5 NS |
351 | static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); |
352 | static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); | |
35b1a6fa | 353 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); |
a0203ca7 | 354 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
35b1a6fa AJ |
355 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
356 | bool *); | |
357 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
358 | bool *); | |
359 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
360 | tree, int, bool *); | |
361 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
6e9a3221 | 362 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
363 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
364 | bool *); | |
365 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
0a35513e AH |
366 | static tree handle_tm_attribute (tree *, tree, tree, int, bool *); |
367 | static tree handle_tm_wrap_attribute (tree *, tree, tree, int, bool *); | |
dcd6de6d | 368 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
369 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
370 | bool *); | |
371 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
372 | bool *); | |
373 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
374 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
375 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
72954a4f JM |
376 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
377 | bool *); | |
3d091dac | 378 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5d32c25 | 379 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
51bc54a6 | 380 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
8fcbce72 JJ |
381 | static tree handle_alloc_align_attribute (tree *, tree, tree, int, bool *); |
382 | static tree handle_assume_aligned_attribute (tree *, tree, tree, int, bool *); | |
5779e713 | 383 | static tree handle_target_attribute (tree *, tree, tree, int, bool *); |
ab442df7 | 384 | static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); |
0a35513e | 385 | static tree ignore_attribute (tree *, tree, tree, int, bool *); |
7458026b | 386 | static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); |
0b7b376d | 387 | static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); |
2a99e5e6 | 388 | static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *); |
826cacfe | 389 | static tree handle_returns_nonnull_attribute (tree *, tree, tree, int, bool *); |
acf0174b JJ |
390 | static tree handle_omp_declare_simd_attribute (tree *, tree, tree, int, |
391 | bool *); | |
392 | static tree handle_omp_declare_target_attribute (tree *, tree, tree, int, | |
393 | bool *); | |
976d5a22 | 394 | static tree handle_designated_init_attribute (tree *, tree, tree, int, bool *); |
d5e254e1 IE |
395 | static tree handle_bnd_variable_size_attribute (tree *, tree, tree, int, bool *); |
396 | static tree handle_bnd_legacy (tree *, tree, tree, int, bool *); | |
397 | static tree handle_bnd_instrument (tree *, tree, tree, int, bool *); | |
35b1a6fa | 398 | |
94a0dd7b | 399 | static void check_function_nonnull (tree, int, tree *); |
35b1a6fa AJ |
400 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
401 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
402 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
d07605f5 | 403 | static int resort_field_decl_cmp (const void *, const void *); |
b34c7881 | 404 | |
eea1139b ILT |
405 | /* Reserved words. The third field is a mask: keywords are disabled |
406 | if they match the mask. | |
407 | ||
408 | Masks for languages: | |
409 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
410 | C --std=c99: D_CXXONLY | D_OBJC | |
411 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
412 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
413 | C++ --std=c0x: D_CONLY | D_OBJC | |
414 | ObjC++ is like C++ except that D_OBJC is not set | |
415 | ||
416 | If -fno-asm is used, D_ASM is added to the mask. If | |
417 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
418 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
1973201f | 419 | In C with -Wc++-compat, we warn if D_CXXWARN is set. |
eea1139b | 420 | |
1973201f NP |
421 | Note the complication of the D_CXX_OBJC keywords. These are |
422 | reserved words such as 'class'. In C++, 'class' is a reserved | |
423 | word. In Objective-C++ it is too. In Objective-C, it is a | |
424 | reserved word too, but only if it follows an '@' sign. | |
425 | */ | |
eea1139b ILT |
426 | const struct c_common_resword c_common_reswords[] = |
427 | { | |
d19fa6b5 JM |
428 | { "_Alignas", RID_ALIGNAS, D_CONLY }, |
429 | { "_Alignof", RID_ALIGNOF, D_CONLY }, | |
267bac10 | 430 | { "_Atomic", RID_ATOMIC, D_CONLY }, |
eea1139b ILT |
431 | { "_Bool", RID_BOOL, D_CONLY }, |
432 | { "_Complex", RID_COMPLEX, 0 }, | |
939b37da BI |
433 | { "_Cilk_spawn", RID_CILK_SPAWN, 0 }, |
434 | { "_Cilk_sync", RID_CILK_SYNC, 0 }, | |
9a771876 | 435 | { "_Cilk_for", RID_CILK_FOR, 0 }, |
fa5da7de | 436 | { "_Imaginary", RID_IMAGINARY, D_CONLY }, |
eea1139b ILT |
437 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, |
438 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
439 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
440 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
441 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
442 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
32912286 | 443 | { "_Static_assert", RID_STATIC_ASSERT, D_CONLY }, |
bbceee64 | 444 | { "_Noreturn", RID_NORETURN, D_CONLY }, |
433cc7b0 | 445 | { "_Generic", RID_GENERIC, D_CONLY }, |
582d9b50 | 446 | { "_Thread_local", RID_THREAD, D_CONLY }, |
eea1139b ILT |
447 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, |
448 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
449 | { "__alignof", RID_ALIGNOF, 0 }, | |
450 | { "__alignof__", RID_ALIGNOF, 0 }, | |
451 | { "__asm", RID_ASM, 0 }, | |
452 | { "__asm__", RID_ASM, 0 }, | |
453 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
454 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
38b7bc7f | 455 | { "__auto_type", RID_AUTO_TYPE, D_CONLY }, |
4daba884 | 456 | { "__bases", RID_BASES, D_CXXONLY }, |
74893f25 RH |
457 | { "__builtin_call_with_static_chain", |
458 | RID_BUILTIN_CALL_WITH_STATIC_CHAIN, D_CONLY }, | |
eea1139b | 459 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, |
d4a83c10 | 460 | { "__builtin_complex", RID_BUILTIN_COMPLEX, D_CONLY }, |
9e1a8dd1 | 461 | { "__builtin_shuffle", RID_BUILTIN_SHUFFLE, 0 }, |
eea1139b ILT |
462 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, |
463 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
464 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
465 | { "__complex", RID_COMPLEX, 0 }, | |
466 | { "__complex__", RID_COMPLEX, 0 }, | |
467 | { "__const", RID_CONST, 0 }, | |
468 | { "__const__", RID_CONST, 0 }, | |
469 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
4daba884 | 470 | { "__direct_bases", RID_DIRECT_BASES, D_CXXONLY }, |
eea1139b ILT |
471 | { "__extension__", RID_EXTENSION, 0 }, |
472 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
473 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
474 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
475 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
476 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
477 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
478 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
479 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
480 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
3c0d13bf PC |
481 | { "__imag", RID_IMAGPART, 0 }, |
482 | { "__imag__", RID_IMAGPART, 0 }, | |
483 | { "__inline", RID_INLINE, 0 }, | |
484 | { "__inline__", RID_INLINE, 0 }, | |
eea1139b ILT |
485 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, |
486 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
487 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
eea1139b ILT |
488 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, |
489 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
b3908fcc | 490 | { "__is_final", RID_IS_FINAL, D_CXXONLY }, |
3c0d13bf | 491 | { "__is_literal_type", RID_IS_LITERAL_TYPE, D_CXXONLY }, |
eea1139b ILT |
492 | { "__is_pod", RID_IS_POD, D_CXXONLY }, |
493 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
971e17ff | 494 | { "__is_same_as", RID_IS_SAME_AS, D_CXXONLY }, |
c32097d8 JM |
495 | { "__is_standard_layout", RID_IS_STD_LAYOUT, D_CXXONLY }, |
496 | { "__is_trivial", RID_IS_TRIVIAL, D_CXXONLY }, | |
dd5d5481 JM |
497 | { "__is_trivially_assignable", RID_IS_TRIVIALLY_ASSIGNABLE, D_CXXONLY }, |
498 | { "__is_trivially_constructible", RID_IS_TRIVIALLY_CONSTRUCTIBLE, D_CXXONLY }, | |
b752325e | 499 | { "__is_trivially_copyable", RID_IS_TRIVIALLY_COPYABLE, D_CXXONLY }, |
eea1139b | 500 | { "__is_union", RID_IS_UNION, D_CXXONLY }, |
eea1139b ILT |
501 | { "__label__", RID_LABEL, 0 }, |
502 | { "__null", RID_NULL, 0 }, | |
503 | { "__real", RID_REALPART, 0 }, | |
504 | { "__real__", RID_REALPART, 0 }, | |
505 | { "__restrict", RID_RESTRICT, 0 }, | |
506 | { "__restrict__", RID_RESTRICT, 0 }, | |
507 | { "__signed", RID_SIGNED, 0 }, | |
508 | { "__signed__", RID_SIGNED, 0 }, | |
509 | { "__thread", RID_THREAD, 0 }, | |
0a35513e AH |
510 | { "__transaction_atomic", RID_TRANSACTION_ATOMIC, 0 }, |
511 | { "__transaction_relaxed", RID_TRANSACTION_RELAXED, 0 }, | |
512 | { "__transaction_cancel", RID_TRANSACTION_CANCEL, 0 }, | |
eea1139b ILT |
513 | { "__typeof", RID_TYPEOF, 0 }, |
514 | { "__typeof__", RID_TYPEOF, 0 }, | |
3c0d13bf | 515 | { "__underlying_type", RID_UNDERLYING_TYPE, D_CXXONLY }, |
eea1139b ILT |
516 | { "__volatile", RID_VOLATILE, 0 }, |
517 | { "__volatile__", RID_VOLATILE, 0 }, | |
36a85135 JM |
518 | { "alignas", RID_ALIGNAS, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
519 | { "alignof", RID_ALIGNOF, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
eea1139b ILT |
520 | { "asm", RID_ASM, D_ASM }, |
521 | { "auto", RID_AUTO, 0 }, | |
03c3034e | 522 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
523 | { "break", RID_BREAK, 0 }, |
524 | { "case", RID_CASE, 0 }, | |
2696a995 | 525 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
eea1139b | 526 | { "char", RID_CHAR, 0 }, |
36a85135 JM |
527 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
528 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
2696a995 | 529 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, |
eea1139b | 530 | { "const", RID_CONST, 0 }, |
36a85135 | 531 | { "constexpr", RID_CONSTEXPR, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
eea1139b ILT |
532 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, |
533 | { "continue", RID_CONTINUE, 0 }, | |
36a85135 | 534 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
eea1139b | 535 | { "default", RID_DEFAULT, 0 }, |
2696a995 | 536 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
537 | { "do", RID_DO, 0 }, |
538 | { "double", RID_DOUBLE, 0 }, | |
539 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
540 | { "else", RID_ELSE, 0 }, | |
541 | { "enum", RID_ENUM, 0 }, | |
2696a995 KG |
542 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
543 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
eea1139b | 544 | { "extern", RID_EXTERN, 0 }, |
2696a995 | 545 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
546 | { "float", RID_FLOAT, 0 }, |
547 | { "for", RID_FOR, 0 }, | |
2696a995 | 548 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
549 | { "goto", RID_GOTO, 0 }, |
550 | { "if", RID_IF, 0 }, | |
551 | { "inline", RID_INLINE, D_EXT89 }, | |
552 | { "int", RID_INT, 0 }, | |
553 | { "long", RID_LONG, 0 }, | |
554 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
2696a995 KG |
555 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
556 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
36a85135 JM |
557 | { "noexcept", RID_NOEXCEPT, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
558 | { "nullptr", RID_NULLPTR, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
2696a995 KG |
559 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, |
560 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
561 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
562 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
eea1139b ILT |
563 | { "register", RID_REGISTER, 0 }, |
564 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
565 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
566 | { "return", RID_RETURN, 0 }, | |
567 | { "short", RID_SHORT, 0 }, | |
568 | { "signed", RID_SIGNED, 0 }, | |
569 | { "sizeof", RID_SIZEOF, 0 }, | |
570 | { "static", RID_STATIC, 0 }, | |
36a85135 | 571 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
eea1139b ILT |
572 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, |
573 | { "struct", RID_STRUCT, 0 }, | |
574 | { "switch", RID_SWITCH, 0 }, | |
2696a995 KG |
575 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
576 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
36a85135 | 577 | { "thread_local", RID_THREAD, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
2696a995 KG |
578 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, |
579 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
580 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
eea1139b | 581 | { "typedef", RID_TYPEDEF, 0 }, |
2696a995 KG |
582 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
583 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
eea1139b ILT |
584 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
585 | { "union", RID_UNION, 0 }, | |
586 | { "unsigned", RID_UNSIGNED, 0 }, | |
2696a995 KG |
587 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
588 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
eea1139b ILT |
589 | { "void", RID_VOID, 0 }, |
590 | { "volatile", RID_VOLATILE, 0 }, | |
591 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
592 | { "while", RID_WHILE, 0 }, | |
971e17ff AS |
593 | |
594 | /* Concepts-related keywords */ | |
595 | { "concept", RID_CONCEPT, D_CXX_CONCEPTS_FLAGS | D_CXXWARN }, | |
596 | { "requires", RID_REQUIRES, D_CXX_CONCEPTS_FLAGS | D_CXXWARN }, | |
597 | ||
eea1139b ILT |
598 | /* These Objective-C keywords are recognized only immediately after |
599 | an '@'. */ | |
600 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
601 | { "defs", RID_AT_DEFS, D_OBJC }, | |
602 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
603 | { "end", RID_AT_END, D_OBJC }, | |
604 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
605 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
606 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
607 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
608 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
609 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
92902b1b IS |
610 | { "optional", RID_AT_OPTIONAL, D_OBJC }, |
611 | { "required", RID_AT_REQUIRED, D_OBJC }, | |
668ea4b1 | 612 | { "property", RID_AT_PROPERTY, D_OBJC }, |
c37d8c30 | 613 | { "package", RID_AT_PACKAGE, D_OBJC }, |
da57d1b9 NP |
614 | { "synthesize", RID_AT_SYNTHESIZE, D_OBJC }, |
615 | { "dynamic", RID_AT_DYNAMIC, D_OBJC }, | |
eea1139b ILT |
616 | /* These are recognized only in protocol-qualifier context |
617 | (see above) */ | |
618 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
619 | { "byref", RID_BYREF, D_OBJC }, | |
620 | { "in", RID_IN, D_OBJC }, | |
621 | { "inout", RID_INOUT, D_OBJC }, | |
622 | { "oneway", RID_ONEWAY, D_OBJC }, | |
623 | { "out", RID_OUT, D_OBJC }, | |
668ea4b1 | 624 | /* These are recognized inside a property attribute list */ |
200290f2 NP |
625 | { "assign", RID_ASSIGN, D_OBJC }, |
626 | { "copy", RID_COPY, D_OBJC }, | |
668ea4b1 | 627 | { "getter", RID_GETTER, D_OBJC }, |
200290f2 NP |
628 | { "nonatomic", RID_NONATOMIC, D_OBJC }, |
629 | { "readonly", RID_READONLY, D_OBJC }, | |
630 | { "readwrite", RID_READWRITE, D_OBJC }, | |
631 | { "retain", RID_RETAIN, D_OBJC }, | |
668ea4b1 | 632 | { "setter", RID_SETTER, D_OBJC }, |
eea1139b ILT |
633 | }; |
634 | ||
635 | const unsigned int num_c_common_reswords = | |
636 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
637 | ||
d5e254e1 IE |
638 | /* Table of machine-independent attributes common to all C-like languages. |
639 | ||
640 | All attributes referencing arguments should be additionally processed | |
641 | in chkp_copy_function_type_adding_bounds for correct instrumentation | |
642 | by Pointer Bounds Checker. | |
643 | Current list of processed common attributes: nonnull. */ | |
349ae713 NB |
644 | const struct attribute_spec c_common_attribute_table[] = |
645 | { | |
62d784f7 KT |
646 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
647 | affects_type_identity } */ | |
349ae713 | 648 | { "packed", 0, 0, false, false, false, |
62d784f7 | 649 | handle_packed_attribute , false}, |
349ae713 | 650 | { "nocommon", 0, 0, true, false, false, |
62d784f7 | 651 | handle_nocommon_attribute, false}, |
349ae713 | 652 | { "common", 0, 0, true, false, false, |
62d784f7 | 653 | handle_common_attribute, false }, |
349ae713 NB |
654 | /* FIXME: logically, noreturn attributes should be listed as |
655 | "false, true, true" and apply to function types. But implementing this | |
656 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
657 | on a decl to identify non-returning functions to be located and fixed | |
658 | to check the function type instead. */ | |
659 | { "noreturn", 0, 0, true, false, false, | |
62d784f7 | 660 | handle_noreturn_attribute, false }, |
349ae713 | 661 | { "volatile", 0, 0, true, false, false, |
62d784f7 | 662 | handle_noreturn_attribute, false }, |
5434dc07 MD |
663 | { "stack_protect", 0, 0, true, false, false, |
664 | handle_stack_protect_attribute, false }, | |
349ae713 | 665 | { "noinline", 0, 0, true, false, false, |
62d784f7 | 666 | handle_noinline_attribute, false }, |
86631ea3 | 667 | { "noclone", 0, 0, true, false, false, |
62d784f7 | 668 | handle_noclone_attribute, false }, |
185c9e56 ML |
669 | { "no_icf", 0, 0, true, false, false, |
670 | handle_noicf_attribute, false }, | |
46a4da10 | 671 | { "leaf", 0, 0, true, false, false, |
62d784f7 | 672 | handle_leaf_attribute, false }, |
349ae713 | 673 | { "always_inline", 0, 0, true, false, false, |
62d784f7 | 674 | handle_always_inline_attribute, false }, |
4eb7fd83 | 675 | { "gnu_inline", 0, 0, true, false, false, |
62d784f7 | 676 | handle_gnu_inline_attribute, false }, |
d752cfdb | 677 | { "artificial", 0, 0, true, false, false, |
62d784f7 | 678 | handle_artificial_attribute, false }, |
0691d1d4 | 679 | { "flatten", 0, 0, true, false, false, |
62d784f7 | 680 | handle_flatten_attribute, false }, |
349ae713 | 681 | { "used", 0, 0, true, false, false, |
62d784f7 | 682 | handle_used_attribute, false }, |
349ae713 | 683 | { "unused", 0, 0, false, false, false, |
62d784f7 | 684 | handle_unused_attribute, false }, |
ce91e74c | 685 | { "externally_visible", 0, 0, true, false, false, |
62d784f7 | 686 | handle_externally_visible_attribute, false }, |
7861b648 AK |
687 | { "no_reorder", 0, 0, true, false, false, |
688 | handle_no_reorder_attribute, false }, | |
349ae713 NB |
689 | /* The same comments as for noreturn attributes apply to const ones. */ |
690 | { "const", 0, 0, true, false, false, | |
62d784f7 | 691 | handle_const_attribute, false }, |
349ae713 | 692 | { "transparent_union", 0, 0, false, false, false, |
62d784f7 | 693 | handle_transparent_union_attribute, false }, |
fc8600f9 | 694 | { "constructor", 0, 1, true, false, false, |
62d784f7 | 695 | handle_constructor_attribute, false }, |
fc8600f9 | 696 | { "destructor", 0, 1, true, false, false, |
62d784f7 | 697 | handle_destructor_attribute, false }, |
349ae713 | 698 | { "mode", 1, 1, false, true, false, |
62d784f7 | 699 | handle_mode_attribute, false }, |
349ae713 | 700 | { "section", 1, 1, true, false, false, |
62d784f7 | 701 | handle_section_attribute, false }, |
349ae713 | 702 | { "aligned", 0, 1, false, false, false, |
62d784f7 | 703 | handle_aligned_attribute, false }, |
349ae713 | 704 | { "weak", 0, 0, true, false, false, |
62d784f7 | 705 | handle_weak_attribute, false }, |
4bb794e2 ST |
706 | { "noplt", 0, 0, true, false, false, |
707 | handle_noplt_attribute, false }, | |
ba885ec5 | 708 | { "ifunc", 1, 1, true, false, false, |
62d784f7 | 709 | handle_ifunc_attribute, false }, |
349ae713 | 710 | { "alias", 1, 1, true, false, false, |
62d784f7 | 711 | handle_alias_attribute, false }, |
a0203ca7 | 712 | { "weakref", 0, 1, true, false, false, |
62d784f7 | 713 | handle_weakref_attribute, false }, |
349ae713 | 714 | { "no_instrument_function", 0, 0, true, false, false, |
62d784f7 KT |
715 | handle_no_instrument_function_attribute, |
716 | false }, | |
349ae713 | 717 | { "malloc", 0, 0, true, false, false, |
62d784f7 | 718 | handle_malloc_attribute, false }, |
6e9a3221 | 719 | { "returns_twice", 0, 0, true, false, false, |
62d784f7 | 720 | handle_returns_twice_attribute, false }, |
349ae713 | 721 | { "no_stack_limit", 0, 0, true, false, false, |
62d784f7 | 722 | handle_no_limit_stack_attribute, false }, |
349ae713 | 723 | { "pure", 0, 0, true, false, false, |
62d784f7 | 724 | handle_pure_attribute, false }, |
0a35513e AH |
725 | { "transaction_callable", 0, 0, false, true, false, |
726 | handle_tm_attribute, false }, | |
727 | { "transaction_unsafe", 0, 0, false, true, false, | |
728 | handle_tm_attribute, false }, | |
729 | { "transaction_safe", 0, 0, false, true, false, | |
730 | handle_tm_attribute, false }, | |
731 | { "transaction_may_cancel_outer", 0, 0, false, true, false, | |
732 | handle_tm_attribute, false }, | |
733 | /* ??? These two attributes didn't make the transition from the | |
734 | Intel language document to the multi-vendor language document. */ | |
735 | { "transaction_pure", 0, 0, false, true, false, | |
736 | handle_tm_attribute, false }, | |
737 | { "transaction_wrap", 1, 1, true, false, false, | |
738 | handle_tm_wrap_attribute, false }, | |
dcd6de6d ZD |
739 | /* For internal use (marking of builtins) only. The name contains space |
740 | to prevent its usage in source code. */ | |
741 | { "no vops", 0, 0, true, false, false, | |
62d784f7 | 742 | handle_novops_attribute, false }, |
9b86d6bb | 743 | { "deprecated", 0, 1, false, false, false, |
62d784f7 | 744 | handle_deprecated_attribute, false }, |
349ae713 | 745 | { "vector_size", 1, 1, false, true, false, |
62d784f7 | 746 | handle_vector_size_attribute, false }, |
d7afec4b | 747 | { "visibility", 1, 1, false, false, false, |
62d784f7 | 748 | handle_visibility_attribute, false }, |
dce81a1a | 749 | { "tls_model", 1, 1, true, false, false, |
62d784f7 | 750 | handle_tls_model_attribute, false }, |
b34c7881 | 751 | { "nonnull", 0, -1, false, true, true, |
62d784f7 | 752 | handle_nonnull_attribute, false }, |
39f2f3c8 | 753 | { "nothrow", 0, 0, true, false, false, |
62d784f7 KT |
754 | handle_nothrow_attribute, false }, |
755 | { "may_alias", 0, 0, false, true, false, NULL, false }, | |
0bfa5f65 | 756 | { "cleanup", 1, 1, true, false, false, |
62d784f7 | 757 | handle_cleanup_attribute, false }, |
72954a4f | 758 | { "warn_unused_result", 0, 0, false, true, true, |
62d784f7 | 759 | handle_warn_unused_result_attribute, false }, |
254986c7 | 760 | { "sentinel", 0, 1, false, true, true, |
62d784f7 | 761 | handle_sentinel_attribute, false }, |
b5d32c25 KG |
762 | /* For internal use (marking of builtins) only. The name contains space |
763 | to prevent its usage in source code. */ | |
764 | { "type generic", 0, 0, false, true, true, | |
62d784f7 | 765 | handle_type_generic_attribute, false }, |
51bc54a6 | 766 | { "alloc_size", 1, 2, false, true, true, |
62d784f7 | 767 | handle_alloc_size_attribute, false }, |
52bf96d2 | 768 | { "cold", 0, 0, true, false, false, |
62d784f7 | 769 | handle_cold_attribute, false }, |
52bf96d2 | 770 | { "hot", 0, 0, true, false, false, |
62d784f7 | 771 | handle_hot_attribute, false }, |
77bc5132 JJ |
772 | { "no_address_safety_analysis", |
773 | 0, 0, true, false, false, | |
774 | handle_no_address_safety_analysis_attribute, | |
775 | false }, | |
e664c61c KS |
776 | { "no_sanitize_address", 0, 0, true, false, false, |
777 | handle_no_sanitize_address_attribute, | |
778 | false }, | |
de35aa66 MS |
779 | { "no_sanitize_thread", 0, 0, true, false, false, |
780 | handle_no_sanitize_address_attribute, | |
781 | false }, | |
ce6923c5 MP |
782 | { "no_sanitize_undefined", 0, 0, true, false, false, |
783 | handle_no_sanitize_undefined_attribute, | |
784 | false }, | |
d2af6a68 | 785 | { "warning", 1, 1, true, false, false, |
62d784f7 | 786 | handle_error_attribute, false }, |
d2af6a68 | 787 | { "error", 1, 1, true, false, false, |
62d784f7 | 788 | handle_error_attribute, false }, |
5779e713 | 789 | { "target", 1, -1, true, false, false, |
62d784f7 | 790 | handle_target_attribute, false }, |
ab442df7 | 791 | { "optimize", 1, -1, true, false, false, |
62d784f7 | 792 | handle_optimize_attribute, false }, |
0a35513e AH |
793 | /* For internal use only. The leading '*' both prevents its usage in |
794 | source code and signals that it may be overridden by machine tables. */ | |
795 | { "*tm regparm", 0, 0, false, true, true, | |
796 | ignore_attribute, false }, | |
7458026b | 797 | { "no_split_stack", 0, 0, true, false, false, |
62d784f7 | 798 | handle_no_split_stack_attribute, false }, |
0b7b376d RG |
799 | /* For internal use (marking of builtins and runtime functions) only. |
800 | The name contains space to prevent its usage in source code. */ | |
801 | { "fn spec", 1, 1, false, true, true, | |
62d784f7 | 802 | handle_fnspec_attribute, false }, |
2a99e5e6 LL |
803 | { "warn_unused", 0, 0, false, false, false, |
804 | handle_warn_unused_attribute, false }, | |
826cacfe MG |
805 | { "returns_nonnull", 0, 0, false, true, true, |
806 | handle_returns_nonnull_attribute, false }, | |
acf0174b JJ |
807 | { "omp declare simd", 0, -1, true, false, false, |
808 | handle_omp_declare_simd_attribute, false }, | |
41958c28 BI |
809 | { "cilk simd function", 0, -1, true, false, false, |
810 | handle_omp_declare_simd_attribute, false }, | |
acf0174b JJ |
811 | { "omp declare target", 0, 0, true, false, false, |
812 | handle_omp_declare_target_attribute, false }, | |
8fcbce72 JJ |
813 | { "alloc_align", 1, 1, false, true, true, |
814 | handle_alloc_align_attribute, false }, | |
815 | { "assume_aligned", 1, 2, false, true, true, | |
816 | handle_assume_aligned_attribute, false }, | |
976d5a22 TT |
817 | { "designated_init", 0, 0, false, true, false, |
818 | handle_designated_init_attribute, false }, | |
d5e254e1 IE |
819 | { "bnd_variable_size", 0, 0, true, false, false, |
820 | handle_bnd_variable_size_attribute, false }, | |
821 | { "bnd_legacy", 0, 0, true, false, false, | |
822 | handle_bnd_legacy, false }, | |
823 | { "bnd_instrument", 0, 0, true, false, false, | |
824 | handle_bnd_instrument, false }, | |
62d784f7 | 825 | { NULL, 0, 0, false, false, false, NULL, false } |
349ae713 NB |
826 | }; |
827 | ||
828 | /* Give the specifications for the format attributes, used by C and all | |
d5e254e1 | 829 | descendants. |
349ae713 | 830 | |
d5e254e1 IE |
831 | All attributes referencing arguments should be additionally processed |
832 | in chkp_copy_function_type_adding_bounds for correct instrumentation | |
833 | by Pointer Bounds Checker. | |
834 | Current list of processed format attributes: format, format_arg. */ | |
349ae713 NB |
835 | const struct attribute_spec c_common_format_attribute_table[] = |
836 | { | |
62d784f7 KT |
837 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
838 | affects_type_identity } */ | |
349ae713 | 839 | { "format", 3, 3, false, true, true, |
62d784f7 | 840 | handle_format_attribute, false }, |
349ae713 | 841 | { "format_arg", 1, 1, false, true, true, |
62d784f7 KT |
842 | handle_format_arg_attribute, false }, |
843 | { NULL, 0, 0, false, false, false, NULL, false } | |
349ae713 NB |
844 | }; |
845 | ||
36c5e70a | 846 | /* Return identifier for address space AS. */ |
3ef0694c | 847 | |
36c5e70a BE |
848 | const char * |
849 | c_addr_space_name (addr_space_t as) | |
850 | { | |
3ef0694c UW |
851 | int rid = RID_FIRST_ADDR_SPACE + as; |
852 | gcc_assert (ridpointers [rid]); | |
853 | return IDENTIFIER_POINTER (ridpointers [rid]); | |
36c5e70a BE |
854 | } |
855 | ||
ec5c56db | 856 | /* Push current bindings for the function name VAR_DECLS. */ |
7da551a2 RS |
857 | |
858 | void | |
35b1a6fa | 859 | start_fname_decls (void) |
7da551a2 | 860 | { |
0ba8a114 NS |
861 | unsigned ix; |
862 | tree saved = NULL_TREE; | |
35b1a6fa | 863 | |
0ba8a114 NS |
864 | for (ix = 0; fname_vars[ix].decl; ix++) |
865 | { | |
866 | tree decl = *fname_vars[ix].decl; | |
7da551a2 | 867 | |
0ba8a114 NS |
868 | if (decl) |
869 | { | |
c62c040f RG |
870 | saved = tree_cons (decl, build_int_cst (integer_type_node, ix), |
871 | saved); | |
0ba8a114 NS |
872 | *fname_vars[ix].decl = NULL_TREE; |
873 | } | |
874 | } | |
875 | if (saved || saved_function_name_decls) | |
876 | /* Normally they'll have been NULL, so only push if we've got a | |
877 | stack, or they are non-NULL. */ | |
878 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
879 | saved_function_name_decls); | |
880 | } | |
881 | ||
325c3691 RH |
882 | /* Finish up the current bindings, adding them into the current function's |
883 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
884 | If there is no current function, we must be at file scope and no statements | |
885 | are involved. Pop the previous bindings. */ | |
0ba8a114 NS |
886 | |
887 | void | |
35b1a6fa | 888 | finish_fname_decls (void) |
0ba8a114 NS |
889 | { |
890 | unsigned ix; | |
325c3691 | 891 | tree stmts = NULL_TREE; |
0ba8a114 NS |
892 | tree stack = saved_function_name_decls; |
893 | ||
894 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
325c3691 | 895 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
35b1a6fa | 896 | |
325c3691 | 897 | if (stmts) |
0ba8a114 | 898 | { |
325c3691 | 899 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
bfaba7a9 | 900 | |
325c3691 RH |
901 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
902 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
6cce57b0 | 903 | |
86ad3aa9 | 904 | append_to_statement_list_force (*bodyp, &stmts); |
325c3691 | 905 | *bodyp = stmts; |
0ba8a114 | 906 | } |
35b1a6fa | 907 | |
0ba8a114 NS |
908 | for (ix = 0; fname_vars[ix].decl; ix++) |
909 | *fname_vars[ix].decl = NULL_TREE; | |
35b1a6fa | 910 | |
0ba8a114 | 911 | if (stack) |
7da551a2 | 912 | { |
ec5c56db | 913 | /* We had saved values, restore them. */ |
0ba8a114 NS |
914 | tree saved; |
915 | ||
916 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
917 | { | |
918 | tree decl = TREE_PURPOSE (saved); | |
919 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); | |
35b1a6fa | 920 | |
0ba8a114 NS |
921 | *fname_vars[ix].decl = decl; |
922 | } | |
923 | stack = TREE_CHAIN (stack); | |
7da551a2 | 924 | } |
0ba8a114 NS |
925 | saved_function_name_decls = stack; |
926 | } | |
927 | ||
6cce57b0 | 928 | /* Return the text name of the current function, suitably prettified |
0d0bc036 | 929 | by PRETTY_P. Return string must be freed by caller. */ |
0ba8a114 NS |
930 | |
931 | const char * | |
35b1a6fa | 932 | fname_as_string (int pretty_p) |
0ba8a114 | 933 | { |
47ab33b2 | 934 | const char *name = "top level"; |
0d0bc036 | 935 | char *namep; |
46c2514e TT |
936 | int vrb = 2, len; |
937 | cpp_string cstr = { 0, 0 }, strname; | |
47ab33b2 | 938 | |
3f75a254 | 939 | if (!pretty_p) |
47ab33b2 MA |
940 | { |
941 | name = ""; | |
942 | vrb = 0; | |
943 | } | |
944 | ||
945 | if (current_function_decl) | |
ae2bcd98 | 946 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
47ab33b2 | 947 | |
46c2514e | 948 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
0d0bc036 | 949 | |
46c2514e TT |
950 | namep = XNEWVEC (char, len); |
951 | snprintf (namep, len, "\"%s\"", name); | |
952 | strname.text = (unsigned char *) namep; | |
953 | strname.len = len - 1; | |
0d0bc036 | 954 | |
b6baa67d | 955 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
46c2514e TT |
956 | { |
957 | XDELETEVEC (namep); | |
958 | return (const char *) cstr.text; | |
0d0bc036 | 959 | } |
0d0bc036 AH |
960 | |
961 | return namep; | |
0ba8a114 NS |
962 | } |
963 | ||
0ba8a114 NS |
964 | /* Return the VAR_DECL for a const char array naming the current |
965 | function. If the VAR_DECL has not yet been created, create it | |
966 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
967 | ID is its name (unfortunately C and C++ hold the RID values of | |
968 | keywords in different places, so we can't derive RID from ID in | |
3ba09659 AH |
969 | this language independent code. LOC is the location of the |
970 | function. */ | |
0ba8a114 NS |
971 | |
972 | tree | |
3ba09659 | 973 | fname_decl (location_t loc, unsigned int rid, tree id) |
0ba8a114 NS |
974 | { |
975 | unsigned ix; | |
976 | tree decl = NULL_TREE; | |
977 | ||
978 | for (ix = 0; fname_vars[ix].decl; ix++) | |
979 | if (fname_vars[ix].rid == rid) | |
980 | break; | |
981 | ||
982 | decl = *fname_vars[ix].decl; | |
983 | if (!decl) | |
7da551a2 | 984 | { |
8d3e27d1 DJ |
985 | /* If a tree is built here, it would normally have the lineno of |
986 | the current statement. Later this tree will be moved to the | |
987 | beginning of the function and this line number will be wrong. | |
988 | To avoid this problem set the lineno to 0 here; that prevents | |
4b7e68e7 | 989 | it from appearing in the RTL. */ |
325c3691 | 990 | tree stmts; |
3c20847b | 991 | location_t saved_location = input_location; |
3c20847b | 992 | input_location = UNKNOWN_LOCATION; |
35b1a6fa | 993 | |
325c3691 | 994 | stmts = push_stmt_list (); |
c2255bc4 | 995 | decl = (*make_fname_decl) (loc, id, fname_vars[ix].pretty); |
325c3691 RH |
996 | stmts = pop_stmt_list (stmts); |
997 | if (!IS_EMPTY_STMT (stmts)) | |
998 | saved_function_name_decls | |
999 | = tree_cons (decl, stmts, saved_function_name_decls); | |
0ba8a114 | 1000 | *fname_vars[ix].decl = decl; |
3c20847b | 1001 | input_location = saved_location; |
7da551a2 | 1002 | } |
0ba8a114 | 1003 | if (!ix && !current_function_decl) |
3ba09659 | 1004 | pedwarn (loc, 0, "%qD is not defined outside of function scope", decl); |
6cce57b0 | 1005 | |
0ba8a114 | 1006 | return decl; |
7da551a2 RS |
1007 | } |
1008 | ||
b84a3874 | 1009 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b30f223b RS |
1010 | |
1011 | tree | |
35b1a6fa | 1012 | fix_string_type (tree value) |
b30f223b | 1013 | { |
b84a3874 RH |
1014 | int length = TREE_STRING_LENGTH (value); |
1015 | int nchars; | |
c162c75e MA |
1016 | tree e_type, i_type, a_type; |
1017 | ||
b57062ca | 1018 | /* Compute the number of elements, for the array type. */ |
b6baa67d KVH |
1019 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
1020 | { | |
1021 | nchars = length; | |
1022 | e_type = char_type_node; | |
1023 | } | |
1024 | else if (TREE_TYPE (value) == char16_array_type_node) | |
1025 | { | |
1026 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
1027 | e_type = char16_type_node; | |
1028 | } | |
1029 | else if (TREE_TYPE (value) == char32_array_type_node) | |
1030 | { | |
1031 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
1032 | e_type = char32_type_node; | |
1033 | } | |
1034 | else | |
1035 | { | |
1036 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
1037 | e_type = wchar_type_node; | |
1038 | } | |
b30f223b | 1039 | |
89a42ac8 ZW |
1040 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
1041 | limit in C++98 Annex B is very large (65536) and is not normative, | |
1042 | so we do not diagnose it (warn_overlength_strings is forced off | |
1043 | in c_common_post_options). */ | |
1044 | if (warn_overlength_strings) | |
1045 | { | |
1046 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
1047 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
1048 | if (nchars - 1 > nchars_max) | |
1049 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
1050 | separate the %d from the 'C'. 'ISO' should not be | |
1051 | translated, but it may be moved after 'C%d' in languages | |
1052 | where modifiers follow nouns. */ | |
509c9d60 | 1053 | pedwarn (input_location, OPT_Woverlength_strings, |
fcf73884 | 1054 | "string length %qd is greater than the length %qd " |
89a42ac8 ZW |
1055 | "ISO C%d compilers are required to support", |
1056 | nchars - 1, nchars_max, relevant_std); | |
1057 | } | |
1326a48b | 1058 | |
cfb10bd3 GDR |
1059 | /* Create the array type for the string constant. The ISO C++ |
1060 | standard says that a string literal has type `const char[N]' or | |
1061 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
1062 | front-end with -Wwrite-strings. | |
1063 | ??? We should change the type of an expression depending on the | |
1064 | state of a warning flag. We should just be warning -- see how | |
1065 | this is handled in the C++ front-end for the deprecated implicit | |
1066 | conversion from string literals to `char*' or `wchar_t*'. | |
c162c75e MA |
1067 | |
1068 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
1069 | array type being the unqualified version of that type. | |
1070 | Therefore, if we are constructing an array of const char, we must | |
1071 | construct the matching unqualified array type first. The C front | |
1072 | end does not require this, but it does no harm, so we do it | |
1073 | unconditionally. */ | |
c62c040f | 1074 | i_type = build_index_type (size_int (nchars - 1)); |
c162c75e | 1075 | a_type = build_array_type (e_type, i_type); |
cfb10bd3 | 1076 | if (c_dialect_cxx() || warn_write_strings) |
46df2823 | 1077 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
d9cf7c82 | 1078 | |
c162c75e | 1079 | TREE_TYPE (value) = a_type; |
ccd4c832 | 1080 | TREE_CONSTANT (value) = 1; |
3521b33c | 1081 | TREE_READONLY (value) = 1; |
b30f223b RS |
1082 | TREE_STATIC (value) = 1; |
1083 | return value; | |
1084 | } | |
1085 | \f | |
02614448 ILT |
1086 | /* If DISABLE is true, stop issuing warnings. This is used when |
1087 | parsing code that we know will not be executed. This function may | |
1088 | be called multiple times, and works as a stack. */ | |
1089 | ||
1090 | static void | |
1091 | c_disable_warnings (bool disable) | |
1092 | { | |
1093 | if (disable) | |
1094 | { | |
1095 | ++c_inhibit_evaluation_warnings; | |
1096 | fold_defer_overflow_warnings (); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* If ENABLE is true, reenable issuing warnings. */ | |
1101 | ||
1102 | static void | |
1103 | c_enable_warnings (bool enable) | |
1104 | { | |
1105 | if (enable) | |
1106 | { | |
1107 | --c_inhibit_evaluation_warnings; | |
1108 | fold_undefer_and_ignore_overflow_warnings (); | |
1109 | } | |
1110 | } | |
1111 | ||
928c19bb JM |
1112 | /* Fully fold EXPR, an expression that was not folded (beyond integer |
1113 | constant expressions and null pointer constants) when being built | |
1114 | up. If IN_INIT, this is in a static initializer and certain | |
1115 | changes are made to the folding done. Clear *MAYBE_CONST if | |
1116 | MAYBE_CONST is not NULL and EXPR is definitely not a constant | |
1117 | expression because it contains an evaluated operator (in C99) or an | |
1118 | operator outside of sizeof returning an integer constant (in C90) | |
1119 | not permitted in constant expressions, or because it contains an | |
1120 | evaluated arithmetic overflow. (*MAYBE_CONST should typically be | |
1121 | set to true by callers before calling this function.) Return the | |
1122 | folded expression. Function arguments have already been folded | |
1123 | before calling this function, as have the contents of SAVE_EXPR, | |
1124 | TARGET_EXPR, BIND_EXPR, VA_ARG_EXPR, OBJ_TYPE_REF and | |
1125 | C_MAYBE_CONST_EXPR. */ | |
1126 | ||
1127 | tree | |
1128 | c_fully_fold (tree expr, bool in_init, bool *maybe_const) | |
1129 | { | |
1130 | tree ret; | |
8ce94e44 | 1131 | tree eptype = NULL_TREE; |
928c19bb JM |
1132 | bool dummy = true; |
1133 | bool maybe_const_itself = true; | |
db3927fb | 1134 | location_t loc = EXPR_LOCATION (expr); |
928c19bb JM |
1135 | |
1136 | /* This function is not relevant to C++ because C++ folds while | |
1137 | parsing, and may need changes to be correct for C++ when C++ | |
1138 | stops folding while parsing. */ | |
1139 | if (c_dialect_cxx ()) | |
1140 | gcc_unreachable (); | |
1141 | ||
1142 | if (!maybe_const) | |
1143 | maybe_const = &dummy; | |
8ce94e44 JM |
1144 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) |
1145 | { | |
1146 | eptype = TREE_TYPE (expr); | |
1147 | expr = TREE_OPERAND (expr, 0); | |
1148 | } | |
928c19bb | 1149 | ret = c_fully_fold_internal (expr, in_init, maybe_const, |
3aa3c9fc | 1150 | &maybe_const_itself, false); |
8ce94e44 | 1151 | if (eptype) |
db3927fb | 1152 | ret = fold_convert_loc (loc, eptype, ret); |
928c19bb JM |
1153 | *maybe_const &= maybe_const_itself; |
1154 | return ret; | |
1155 | } | |
1156 | ||
1157 | /* Internal helper for c_fully_fold. EXPR and IN_INIT are as for | |
1158 | c_fully_fold. *MAYBE_CONST_OPERANDS is cleared because of operands | |
1159 | not permitted, while *MAYBE_CONST_ITSELF is cleared because of | |
1160 | arithmetic overflow (for C90, *MAYBE_CONST_OPERANDS is carried from | |
1161 | both evaluated and unevaluated subexpressions while | |
1162 | *MAYBE_CONST_ITSELF is carried from only evaluated | |
3aa3c9fc MP |
1163 | subexpressions). FOR_INT_CONST indicates if EXPR is an expression |
1164 | with integer constant operands, and if any of the operands doesn't | |
1165 | get folded to an integer constant, don't fold the expression itself. */ | |
928c19bb JM |
1166 | |
1167 | static tree | |
1168 | c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands, | |
3aa3c9fc | 1169 | bool *maybe_const_itself, bool for_int_const) |
928c19bb JM |
1170 | { |
1171 | tree ret = expr; | |
1172 | enum tree_code code = TREE_CODE (expr); | |
1173 | enum tree_code_class kind = TREE_CODE_CLASS (code); | |
1174 | location_t loc = EXPR_LOCATION (expr); | |
1175 | tree op0, op1, op2, op3; | |
1176 | tree orig_op0, orig_op1, orig_op2; | |
1177 | bool op0_const = true, op1_const = true, op2_const = true; | |
1178 | bool op0_const_self = true, op1_const_self = true, op2_const_self = true; | |
1179 | bool nowarning = TREE_NO_WARNING (expr); | |
02614448 | 1180 | bool unused_p; |
928c19bb JM |
1181 | |
1182 | /* This function is not relevant to C++ because C++ folds while | |
1183 | parsing, and may need changes to be correct for C++ when C++ | |
1184 | stops folding while parsing. */ | |
1185 | if (c_dialect_cxx ()) | |
1186 | gcc_unreachable (); | |
1187 | ||
1188 | /* Constants, declarations, statements, errors, SAVE_EXPRs and | |
1189 | anything else not counted as an expression cannot usefully be | |
1190 | folded further at this point. */ | |
1191 | if (!IS_EXPR_CODE_CLASS (kind) | |
1192 | || kind == tcc_statement | |
1193 | || code == SAVE_EXPR) | |
1194 | return expr; | |
1195 | ||
1196 | /* Operands of variable-length expressions (function calls) have | |
1197 | already been folded, as have __builtin_* function calls, and such | |
1198 | expressions cannot occur in constant expressions. */ | |
1199 | if (kind == tcc_vl_exp) | |
1200 | { | |
1201 | *maybe_const_operands = false; | |
1202 | ret = fold (expr); | |
1203 | goto out; | |
1204 | } | |
1205 | ||
1206 | if (code == C_MAYBE_CONST_EXPR) | |
1207 | { | |
1208 | tree pre = C_MAYBE_CONST_EXPR_PRE (expr); | |
1209 | tree inner = C_MAYBE_CONST_EXPR_EXPR (expr); | |
1210 | if (C_MAYBE_CONST_EXPR_NON_CONST (expr)) | |
1211 | *maybe_const_operands = false; | |
1212 | if (C_MAYBE_CONST_EXPR_INT_OPERANDS (expr)) | |
3aa3c9fc MP |
1213 | { |
1214 | *maybe_const_itself = false; | |
1215 | inner = c_fully_fold_internal (inner, in_init, maybe_const_operands, | |
1216 | maybe_const_itself, true); | |
1217 | } | |
928c19bb JM |
1218 | if (pre && !in_init) |
1219 | ret = build2 (COMPOUND_EXPR, TREE_TYPE (expr), pre, inner); | |
1220 | else | |
1221 | ret = inner; | |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | /* Assignment, increment, decrement, function call and comma | |
1226 | operators, and statement expressions, cannot occur in constant | |
1227 | expressions if evaluated / outside of sizeof. (Function calls | |
1228 | were handled above, though VA_ARG_EXPR is treated like a function | |
1229 | call here, and statement expressions are handled through | |
1230 | C_MAYBE_CONST_EXPR to avoid folding inside them.) */ | |
1231 | switch (code) | |
1232 | { | |
1233 | case MODIFY_EXPR: | |
1234 | case PREDECREMENT_EXPR: | |
1235 | case PREINCREMENT_EXPR: | |
1236 | case POSTDECREMENT_EXPR: | |
1237 | case POSTINCREMENT_EXPR: | |
1238 | case COMPOUND_EXPR: | |
1239 | *maybe_const_operands = false; | |
1240 | break; | |
1241 | ||
1242 | case VA_ARG_EXPR: | |
1243 | case TARGET_EXPR: | |
1244 | case BIND_EXPR: | |
1245 | case OBJ_TYPE_REF: | |
1246 | *maybe_const_operands = false; | |
1247 | ret = fold (expr); | |
1248 | goto out; | |
1249 | ||
1250 | default: | |
1251 | break; | |
1252 | } | |
1253 | ||
1254 | /* Fold individual tree codes as appropriate. */ | |
1255 | switch (code) | |
1256 | { | |
1257 | case COMPOUND_LITERAL_EXPR: | |
1258 | /* Any non-constancy will have been marked in a containing | |
1259 | C_MAYBE_CONST_EXPR; there is no more folding to do here. */ | |
1260 | goto out; | |
1261 | ||
1262 | case COMPONENT_REF: | |
1263 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1264 | op1 = TREE_OPERAND (expr, 1); | |
1265 | op2 = TREE_OPERAND (expr, 2); | |
1266 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
3aa3c9fc | 1267 | maybe_const_itself, for_int_const); |
e5a94231 | 1268 | STRIP_TYPE_NOPS (op0); |
928c19bb JM |
1269 | if (op0 != orig_op0) |
1270 | ret = build3 (COMPONENT_REF, TREE_TYPE (expr), op0, op1, op2); | |
1271 | if (ret != expr) | |
1272 | { | |
1273 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1274 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1275 | } | |
1276 | goto out; | |
1277 | ||
1278 | case ARRAY_REF: | |
1279 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1280 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1281 | op2 = TREE_OPERAND (expr, 2); | |
1282 | op3 = TREE_OPERAND (expr, 3); | |
1283 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
3aa3c9fc | 1284 | maybe_const_itself, for_int_const); |
e5a94231 | 1285 | STRIP_TYPE_NOPS (op0); |
928c19bb | 1286 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, |
3aa3c9fc | 1287 | maybe_const_itself, for_int_const); |
e5a94231 | 1288 | STRIP_TYPE_NOPS (op1); |
928c19bb JM |
1289 | op1 = decl_constant_value_for_optimization (op1); |
1290 | if (op0 != orig_op0 || op1 != orig_op1) | |
1291 | ret = build4 (ARRAY_REF, TREE_TYPE (expr), op0, op1, op2, op3); | |
1292 | if (ret != expr) | |
1293 | { | |
1294 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1295 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1296 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1297 | } | |
1298 | ret = fold (ret); | |
1299 | goto out; | |
1300 | ||
1301 | case COMPOUND_EXPR: | |
1302 | case MODIFY_EXPR: | |
1303 | case PREDECREMENT_EXPR: | |
1304 | case PREINCREMENT_EXPR: | |
1305 | case POSTDECREMENT_EXPR: | |
1306 | case POSTINCREMENT_EXPR: | |
1307 | case PLUS_EXPR: | |
1308 | case MINUS_EXPR: | |
1309 | case MULT_EXPR: | |
1310 | case POINTER_PLUS_EXPR: | |
1311 | case TRUNC_DIV_EXPR: | |
1312 | case CEIL_DIV_EXPR: | |
1313 | case FLOOR_DIV_EXPR: | |
1314 | case TRUNC_MOD_EXPR: | |
1315 | case RDIV_EXPR: | |
1316 | case EXACT_DIV_EXPR: | |
1317 | case LSHIFT_EXPR: | |
1318 | case RSHIFT_EXPR: | |
1319 | case BIT_IOR_EXPR: | |
1320 | case BIT_XOR_EXPR: | |
1321 | case BIT_AND_EXPR: | |
1322 | case LT_EXPR: | |
1323 | case LE_EXPR: | |
1324 | case GT_EXPR: | |
1325 | case GE_EXPR: | |
1326 | case EQ_EXPR: | |
1327 | case NE_EXPR: | |
1328 | case COMPLEX_EXPR: | |
1329 | case TRUTH_AND_EXPR: | |
1330 | case TRUTH_OR_EXPR: | |
1331 | case TRUTH_XOR_EXPR: | |
1332 | case UNORDERED_EXPR: | |
1333 | case ORDERED_EXPR: | |
1334 | case UNLT_EXPR: | |
1335 | case UNLE_EXPR: | |
1336 | case UNGT_EXPR: | |
1337 | case UNGE_EXPR: | |
1338 | case UNEQ_EXPR: | |
1339 | /* Binary operations evaluating both arguments (increment and | |
1340 | decrement are binary internally in GCC). */ | |
1341 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1342 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1343 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
3aa3c9fc | 1344 | maybe_const_itself, for_int_const); |
e5a94231 | 1345 | STRIP_TYPE_NOPS (op0); |
928c19bb JM |
1346 | if (code != MODIFY_EXPR |
1347 | && code != PREDECREMENT_EXPR | |
1348 | && code != PREINCREMENT_EXPR | |
1349 | && code != POSTDECREMENT_EXPR | |
1350 | && code != POSTINCREMENT_EXPR) | |
1351 | op0 = decl_constant_value_for_optimization (op0); | |
1352 | /* The RHS of a MODIFY_EXPR was fully folded when building that | |
1353 | expression for the sake of conversion warnings. */ | |
1354 | if (code != MODIFY_EXPR) | |
1355 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, | |
3aa3c9fc | 1356 | maybe_const_itself, for_int_const); |
e5a94231 | 1357 | STRIP_TYPE_NOPS (op1); |
928c19bb | 1358 | op1 = decl_constant_value_for_optimization (op1); |
3aa3c9fc MP |
1359 | |
1360 | if (for_int_const && (TREE_CODE (op0) != INTEGER_CST | |
1361 | || TREE_CODE (op1) != INTEGER_CST)) | |
1362 | goto out; | |
1363 | ||
928c19bb JM |
1364 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1365 | ret = in_init | |
db3927fb AH |
1366 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1367 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
928c19bb JM |
1368 | else |
1369 | ret = fold (expr); | |
f5178456 RS |
1370 | if (TREE_OVERFLOW_P (ret) |
1371 | && !TREE_OVERFLOW_P (op0) | |
1372 | && !TREE_OVERFLOW_P (op1)) | |
451b5e48 | 1373 | overflow_warning (EXPR_LOC_OR_LOC (expr, input_location), ret); |
0173bd2a MP |
1374 | if (code == LSHIFT_EXPR |
1375 | && TREE_CODE (orig_op0) != INTEGER_CST | |
1376 | && TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1377 | && TREE_CODE (op0) == INTEGER_CST | |
1378 | && c_inhibit_evaluation_warnings == 0 | |
1379 | && tree_int_cst_sgn (op0) < 0) | |
1380 | warning_at (loc, OPT_Wshift_negative_value, | |
1381 | "left shift of negative value"); | |
cc83c823 JJ |
1382 | if ((code == LSHIFT_EXPR || code == RSHIFT_EXPR) |
1383 | && TREE_CODE (orig_op1) != INTEGER_CST | |
1384 | && TREE_CODE (op1) == INTEGER_CST | |
1385 | && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1386 | || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE) | |
1387 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE | |
1388 | && c_inhibit_evaluation_warnings == 0) | |
1389 | { | |
1390 | if (tree_int_cst_sgn (op1) < 0) | |
4853031e MP |
1391 | warning_at (loc, OPT_Wshift_count_negative, |
1392 | (code == LSHIFT_EXPR | |
1393 | ? G_("left shift count is negative") | |
1394 | : G_("right shift count is negative"))); | |
cc83c823 JJ |
1395 | else if (compare_tree_int (op1, |
1396 | TYPE_PRECISION (TREE_TYPE (orig_op0))) | |
1397 | >= 0) | |
4853031e MP |
1398 | warning_at (loc, OPT_Wshift_count_overflow, |
1399 | (code == LSHIFT_EXPR | |
1400 | ? G_("left shift count >= width of type") | |
1401 | : G_("right shift count >= width of type"))); | |
cc83c823 | 1402 | } |
451b5e48 MP |
1403 | if (code == LSHIFT_EXPR |
1404 | /* If either OP0 has been folded to INTEGER_CST... */ | |
1405 | && ((TREE_CODE (orig_op0) != INTEGER_CST | |
1406 | && TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1407 | && TREE_CODE (op0) == INTEGER_CST) | |
1408 | /* ...or if OP1 has been folded to INTEGER_CST... */ | |
1409 | || (TREE_CODE (orig_op1) != INTEGER_CST | |
1410 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE | |
1411 | && TREE_CODE (op1) == INTEGER_CST)) | |
1412 | && c_inhibit_evaluation_warnings == 0) | |
1413 | /* ...then maybe we can detect an overflow. */ | |
1414 | maybe_warn_shift_overflow (loc, op0, op1); | |
4a9a42ab MP |
1415 | if ((code == TRUNC_DIV_EXPR |
1416 | || code == CEIL_DIV_EXPR | |
1417 | || code == FLOOR_DIV_EXPR | |
1418 | || code == EXACT_DIV_EXPR | |
1419 | || code == TRUNC_MOD_EXPR) | |
1420 | && TREE_CODE (orig_op1) != INTEGER_CST | |
1421 | && TREE_CODE (op1) == INTEGER_CST | |
1422 | && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1423 | || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE) | |
1424 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE) | |
1425 | warn_for_div_by_zero (loc, op1); | |
928c19bb JM |
1426 | goto out; |
1427 | ||
1428 | case INDIRECT_REF: | |
1429 | case FIX_TRUNC_EXPR: | |
1430 | case FLOAT_EXPR: | |
1431 | CASE_CONVERT: | |
2ce064c3 | 1432 | case ADDR_SPACE_CONVERT_EXPR: |
982d62f6 | 1433 | case VIEW_CONVERT_EXPR: |
928c19bb JM |
1434 | case NON_LVALUE_EXPR: |
1435 | case NEGATE_EXPR: | |
1436 | case BIT_NOT_EXPR: | |
1437 | case TRUTH_NOT_EXPR: | |
1438 | case ADDR_EXPR: | |
1439 | case CONJ_EXPR: | |
1440 | case REALPART_EXPR: | |
1441 | case IMAGPART_EXPR: | |
1442 | /* Unary operations. */ | |
1443 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1444 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
3aa3c9fc | 1445 | maybe_const_itself, for_int_const); |
e5a94231 | 1446 | STRIP_TYPE_NOPS (op0); |
928c19bb JM |
1447 | if (code != ADDR_EXPR && code != REALPART_EXPR && code != IMAGPART_EXPR) |
1448 | op0 = decl_constant_value_for_optimization (op0); | |
3aa3c9fc MP |
1449 | |
1450 | if (for_int_const && TREE_CODE (op0) != INTEGER_CST) | |
1451 | goto out; | |
1452 | ||
693ddb1b EB |
1453 | /* ??? Cope with user tricks that amount to offsetof. The middle-end is |
1454 | not prepared to deal with them if they occur in initializers. */ | |
1455 | if (op0 != orig_op0 | |
1456 | && code == ADDR_EXPR | |
1457 | && (op1 = get_base_address (op0)) != NULL_TREE | |
22d03525 | 1458 | && INDIRECT_REF_P (op1) |
693ddb1b | 1459 | && TREE_CONSTANT (TREE_OPERAND (op1, 0))) |
cf9e9959 | 1460 | ret = fold_convert_loc (loc, TREE_TYPE (expr), fold_offsetof_1 (op0)); |
693ddb1b | 1461 | else if (op0 != orig_op0 || in_init) |
928c19bb | 1462 | ret = in_init |
db3927fb AH |
1463 | ? fold_build1_initializer_loc (loc, code, TREE_TYPE (expr), op0) |
1464 | : fold_build1_loc (loc, code, TREE_TYPE (expr), op0); | |
928c19bb JM |
1465 | else |
1466 | ret = fold (expr); | |
1467 | if (code == INDIRECT_REF | |
1468 | && ret != expr | |
22d03525 | 1469 | && INDIRECT_REF_P (ret)) |
928c19bb JM |
1470 | { |
1471 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1472 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1473 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1474 | } | |
f5178456 RS |
1475 | switch (code) |
1476 | { | |
1477 | case FIX_TRUNC_EXPR: | |
1478 | case FLOAT_EXPR: | |
1479 | CASE_CONVERT: | |
1480 | /* Don't warn about explicit conversions. We will already | |
1481 | have warned about suspect implicit conversions. */ | |
1482 | break; | |
1483 | ||
1484 | default: | |
1485 | if (TREE_OVERFLOW_P (ret) && !TREE_OVERFLOW_P (op0)) | |
1486 | overflow_warning (EXPR_LOCATION (expr), ret); | |
1487 | break; | |
1488 | } | |
928c19bb JM |
1489 | goto out; |
1490 | ||
1491 | case TRUTH_ANDIF_EXPR: | |
1492 | case TRUTH_ORIF_EXPR: | |
1493 | /* Binary operations not necessarily evaluating both | |
1494 | arguments. */ | |
1495 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1496 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
3aa3c9fc MP |
1497 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self, |
1498 | for_int_const); | |
e5a94231 | 1499 | STRIP_TYPE_NOPS (op0); |
f5178456 RS |
1500 | |
1501 | unused_p = (op0 == (code == TRUTH_ANDIF_EXPR | |
1502 | ? truthvalue_false_node | |
1503 | : truthvalue_true_node)); | |
02614448 | 1504 | c_disable_warnings (unused_p); |
3aa3c9fc MP |
1505 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self, |
1506 | for_int_const); | |
e5a94231 | 1507 | STRIP_TYPE_NOPS (op1); |
02614448 | 1508 | c_enable_warnings (unused_p); |
f5178456 | 1509 | |
3aa3c9fc MP |
1510 | if (for_int_const |
1511 | && (TREE_CODE (op0) != INTEGER_CST | |
1512 | /* Require OP1 be an INTEGER_CST only if it's evaluated. */ | |
1513 | || (!unused_p && TREE_CODE (op1) != INTEGER_CST))) | |
1514 | goto out; | |
1515 | ||
928c19bb JM |
1516 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1517 | ret = in_init | |
db3927fb AH |
1518 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1519 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
928c19bb JM |
1520 | else |
1521 | ret = fold (expr); | |
1522 | *maybe_const_operands &= op0_const; | |
1523 | *maybe_const_itself &= op0_const_self; | |
1524 | if (!(flag_isoc99 | |
1525 | && op0_const | |
1526 | && op0_const_self | |
1527 | && (code == TRUTH_ANDIF_EXPR | |
1528 | ? op0 == truthvalue_false_node | |
1529 | : op0 == truthvalue_true_node))) | |
1530 | *maybe_const_operands &= op1_const; | |
1531 | if (!(op0_const | |
1532 | && op0_const_self | |
1533 | && (code == TRUTH_ANDIF_EXPR | |
1534 | ? op0 == truthvalue_false_node | |
1535 | : op0 == truthvalue_true_node))) | |
1536 | *maybe_const_itself &= op1_const_self; | |
1537 | goto out; | |
1538 | ||
1539 | case COND_EXPR: | |
1540 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1541 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1542 | orig_op2 = op2 = TREE_OPERAND (expr, 2); | |
3aa3c9fc MP |
1543 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self, |
1544 | for_int_const); | |
f5178456 | 1545 | |
e5a94231 | 1546 | STRIP_TYPE_NOPS (op0); |
02614448 | 1547 | c_disable_warnings (op0 == truthvalue_false_node); |
3aa3c9fc MP |
1548 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self, |
1549 | for_int_const); | |
e5a94231 | 1550 | STRIP_TYPE_NOPS (op1); |
02614448 | 1551 | c_enable_warnings (op0 == truthvalue_false_node); |
f5178456 | 1552 | |
02614448 | 1553 | c_disable_warnings (op0 == truthvalue_true_node); |
3aa3c9fc MP |
1554 | op2 = c_fully_fold_internal (op2, in_init, &op2_const, &op2_const_self, |
1555 | for_int_const); | |
e5a94231 | 1556 | STRIP_TYPE_NOPS (op2); |
02614448 | 1557 | c_enable_warnings (op0 == truthvalue_true_node); |
f5178456 | 1558 | |
3aa3c9fc MP |
1559 | if (for_int_const |
1560 | && (TREE_CODE (op0) != INTEGER_CST | |
1561 | /* Only the evaluated operand must be an INTEGER_CST. */ | |
1562 | || (op0 == truthvalue_true_node | |
1563 | ? TREE_CODE (op1) != INTEGER_CST | |
1564 | : TREE_CODE (op2) != INTEGER_CST))) | |
1565 | goto out; | |
1566 | ||
928c19bb | 1567 | if (op0 != orig_op0 || op1 != orig_op1 || op2 != orig_op2) |
db3927fb | 1568 | ret = fold_build3_loc (loc, code, TREE_TYPE (expr), op0, op1, op2); |
928c19bb JM |
1569 | else |
1570 | ret = fold (expr); | |
1571 | *maybe_const_operands &= op0_const; | |
1572 | *maybe_const_itself &= op0_const_self; | |
1573 | if (!(flag_isoc99 | |
1574 | && op0_const | |
1575 | && op0_const_self | |
1576 | && op0 == truthvalue_false_node)) | |
1577 | *maybe_const_operands &= op1_const; | |
1578 | if (!(op0_const | |
1579 | && op0_const_self | |
1580 | && op0 == truthvalue_false_node)) | |
1581 | *maybe_const_itself &= op1_const_self; | |
1582 | if (!(flag_isoc99 | |
1583 | && op0_const | |
1584 | && op0_const_self | |
1585 | && op0 == truthvalue_true_node)) | |
1586 | *maybe_const_operands &= op2_const; | |
1587 | if (!(op0_const | |
1588 | && op0_const_self | |
1589 | && op0 == truthvalue_true_node)) | |
1590 | *maybe_const_itself &= op2_const_self; | |
1591 | goto out; | |
1592 | ||
8ce94e44 JM |
1593 | case EXCESS_PRECISION_EXPR: |
1594 | /* Each case where an operand with excess precision may be | |
1595 | encountered must remove the EXCESS_PRECISION_EXPR around | |
1596 | inner operands and possibly put one around the whole | |
1597 | expression or possibly convert to the semantic type (which | |
1598 | c_fully_fold does); we cannot tell at this stage which is | |
1599 | appropriate in any particular case. */ | |
1600 | gcc_unreachable (); | |
1601 | ||
928c19bb JM |
1602 | default: |
1603 | /* Various codes may appear through folding built-in functions | |
1604 | and their arguments. */ | |
1605 | goto out; | |
1606 | } | |
1607 | ||
1608 | out: | |
1609 | /* Some folding may introduce NON_LVALUE_EXPRs; all lvalue checks | |
1610 | have been done by this point, so remove them again. */ | |
1611 | nowarning |= TREE_NO_WARNING (ret); | |
1612 | STRIP_TYPE_NOPS (ret); | |
1613 | if (nowarning && !TREE_NO_WARNING (ret)) | |
1614 | { | |
1615 | if (!CAN_HAVE_LOCATION_P (ret)) | |
1616 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
1617 | TREE_NO_WARNING (ret) = 1; | |
1618 | } | |
1619 | if (ret != expr) | |
1620 | protected_set_expr_location (ret, loc); | |
1621 | return ret; | |
1622 | } | |
1623 | ||
1624 | /* If not optimizing, EXP is not a VAR_DECL, or EXP has array type, | |
1625 | return EXP. Otherwise, return either EXP or its known constant | |
1626 | value (if it has one), but return EXP if EXP has mode BLKmode. ??? | |
1627 | Is the BLKmode test appropriate? */ | |
1628 | ||
1629 | tree | |
1630 | decl_constant_value_for_optimization (tree exp) | |
1631 | { | |
1632 | tree ret; | |
1633 | ||
1634 | /* This function is only used by C, for c_fully_fold and other | |
1635 | optimization, and may not be correct for C++. */ | |
1636 | if (c_dialect_cxx ()) | |
1637 | gcc_unreachable (); | |
1638 | ||
1639 | if (!optimize | |
0ae9bd27 | 1640 | || !VAR_P (exp) |
928c19bb JM |
1641 | || TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE |
1642 | || DECL_MODE (exp) == BLKmode) | |
1643 | return exp; | |
1644 | ||
1645 | ret = decl_constant_value (exp); | |
1646 | /* Avoid unwanted tree sharing between the initializer and current | |
1647 | function's body where the tree can be modified e.g. by the | |
1648 | gimplifier. */ | |
1649 | if (ret != exp && TREE_STATIC (exp)) | |
1650 | ret = unshare_expr (ret); | |
1651 | return ret; | |
1652 | } | |
1653 | ||
d74154d5 RS |
1654 | /* Print a warning if a constant expression had overflow in folding. |
1655 | Invoke this function on every expression that the language | |
1656 | requires to be a constant expression. | |
1657 | Note the ANSI C standard says it is erroneous for a | |
1658 | constant expression to overflow. */ | |
96571883 BK |
1659 | |
1660 | void | |
35b1a6fa | 1661 | constant_expression_warning (tree value) |
393eda6a | 1662 | { |
b8698a0f | 1663 | if (warn_overflow && pedantic |
393eda6a MLI |
1664 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
1665 | || TREE_CODE (value) == FIXED_CST | |
1666 | || TREE_CODE (value) == VECTOR_CST | |
1667 | || TREE_CODE (value) == COMPLEX_CST) | |
1668 | && TREE_OVERFLOW (value)) | |
509c9d60 | 1669 | pedwarn (input_location, OPT_Woverflow, "overflow in constant expression"); |
393eda6a MLI |
1670 | } |
1671 | ||
1672 | /* The same as above but print an unconditional error. */ | |
1673 | void | |
1674 | constant_expression_error (tree value) | |
96571883 | 1675 | { |
c05f751c | 1676 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
ab22c1fa | 1677 | || TREE_CODE (value) == FIXED_CST |
69ef87e2 | 1678 | || TREE_CODE (value) == VECTOR_CST |
c05f751c | 1679 | || TREE_CODE (value) == COMPLEX_CST) |
393eda6a MLI |
1680 | && TREE_OVERFLOW (value)) |
1681 | error ("overflow in constant expression"); | |
d74154d5 RS |
1682 | } |
1683 | ||
59c0753d MLI |
1684 | /* Print a warning if an expression had overflow in folding and its |
1685 | operands hadn't. | |
1686 | ||
d74154d5 RS |
1687 | Invoke this function on every expression that |
1688 | (1) appears in the source code, and | |
59c0753d | 1689 | (2) is a constant expression that overflowed, and |
d74154d5 | 1690 | (3) is not already checked by convert_and_check; |
59c0753d MLI |
1691 | however, do not invoke this function on operands of explicit casts |
1692 | or when the expression is the result of an operator and any operand | |
1693 | already overflowed. */ | |
d74154d5 RS |
1694 | |
1695 | void | |
c2255bc4 | 1696 | overflow_warning (location_t loc, tree value) |
d74154d5 | 1697 | { |
7d882b83 ILT |
1698 | if (c_inhibit_evaluation_warnings != 0) |
1699 | return; | |
59c0753d MLI |
1700 | |
1701 | switch (TREE_CODE (value)) | |
69ef87e2 | 1702 | { |
59c0753d | 1703 | case INTEGER_CST: |
c2255bc4 | 1704 | warning_at (loc, OPT_Woverflow, "integer overflow in expression"); |
59c0753d | 1705 | break; |
b8698a0f | 1706 | |
59c0753d | 1707 | case REAL_CST: |
c2255bc4 AH |
1708 | warning_at (loc, OPT_Woverflow, |
1709 | "floating point overflow in expression"); | |
59c0753d | 1710 | break; |
b8698a0f | 1711 | |
ab22c1fa | 1712 | case FIXED_CST: |
c2255bc4 | 1713 | warning_at (loc, OPT_Woverflow, "fixed-point overflow in expression"); |
ab22c1fa CF |
1714 | break; |
1715 | ||
59c0753d | 1716 | case VECTOR_CST: |
c2255bc4 | 1717 | warning_at (loc, OPT_Woverflow, "vector overflow in expression"); |
59c0753d | 1718 | break; |
b8698a0f | 1719 | |
59c0753d MLI |
1720 | case COMPLEX_CST: |
1721 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
c2255bc4 AH |
1722 | warning_at (loc, OPT_Woverflow, |
1723 | "complex integer overflow in expression"); | |
59c0753d | 1724 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) |
c2255bc4 AH |
1725 | warning_at (loc, OPT_Woverflow, |
1726 | "complex floating point overflow in expression"); | |
59c0753d MLI |
1727 | break; |
1728 | ||
1729 | default: | |
1730 | break; | |
69ef87e2 | 1731 | } |
d74154d5 RS |
1732 | } |
1733 | ||
ca409efd MLI |
1734 | /* Warn about uses of logical || / && operator in a context where it |
1735 | is likely that the bitwise equivalent was intended by the | |
1736 | programmer. We have seen an expression in which CODE is a binary | |
a243fb4a MLI |
1737 | operator used to combine expressions OP_LEFT and OP_RIGHT, which before folding |
1738 | had CODE_LEFT and CODE_RIGHT, into an expression of type TYPE. */ | |
63a08740 | 1739 | void |
a243fb4a | 1740 | warn_logical_operator (location_t location, enum tree_code code, tree type, |
b8698a0f | 1741 | enum tree_code code_left, tree op_left, |
ca409efd | 1742 | enum tree_code ARG_UNUSED (code_right), tree op_right) |
63a08740 | 1743 | { |
a243fb4a MLI |
1744 | int or_op = (code == TRUTH_ORIF_EXPR || code == TRUTH_OR_EXPR); |
1745 | int in0_p, in1_p, in_p; | |
1746 | tree low0, low1, low, high0, high1, high, lhs, rhs, tem; | |
1747 | bool strict_overflow_p = false; | |
1748 | ||
ca409efd MLI |
1749 | if (code != TRUTH_ANDIF_EXPR |
1750 | && code != TRUTH_AND_EXPR | |
1751 | && code != TRUTH_ORIF_EXPR | |
1752 | && code != TRUTH_OR_EXPR) | |
1753 | return; | |
1754 | ||
b8787813 MP |
1755 | /* We don't want to warn if either operand comes from a macro |
1756 | expansion. ??? This doesn't work with e.g. NEGATE_EXPR yet; | |
1757 | see PR61534. */ | |
1758 | if (from_macro_expansion_at (EXPR_LOCATION (op_left)) | |
1759 | || from_macro_expansion_at (EXPR_LOCATION (op_right))) | |
1760 | return; | |
1761 | ||
ca409efd MLI |
1762 | /* Warn if &&/|| are being used in a context where it is |
1763 | likely that the bitwise equivalent was intended by the | |
1764 | programmer. That is, an expression such as op && MASK | |
1765 | where op should not be any boolean expression, nor a | |
1766 | constant, and mask seems to be a non-boolean integer constant. */ | |
1767 | if (!truth_value_p (code_left) | |
1768 | && INTEGRAL_TYPE_P (TREE_TYPE (op_left)) | |
1769 | && !CONSTANT_CLASS_P (op_left) | |
1770 | && !TREE_NO_WARNING (op_left) | |
1771 | && TREE_CODE (op_right) == INTEGER_CST | |
1772 | && !integer_zerop (op_right) | |
1773 | && !integer_onep (op_right)) | |
63a08740 | 1774 | { |
a243fb4a | 1775 | if (or_op) |
ca409efd MLI |
1776 | warning_at (location, OPT_Wlogical_op, "logical %<or%>" |
1777 | " applied to non-boolean constant"); | |
1778 | else | |
1779 | warning_at (location, OPT_Wlogical_op, "logical %<and%>" | |
1780 | " applied to non-boolean constant"); | |
1781 | TREE_NO_WARNING (op_left) = true; | |
a243fb4a MLI |
1782 | return; |
1783 | } | |
1784 | ||
1785 | /* We do not warn for constants because they are typical of macro | |
1786 | expansions that test for features. */ | |
1787 | if (CONSTANT_CLASS_P (op_left) || CONSTANT_CLASS_P (op_right)) | |
1788 | return; | |
1789 | ||
1790 | /* This warning only makes sense with logical operands. */ | |
1791 | if (!(truth_value_p (TREE_CODE (op_left)) | |
1792 | || INTEGRAL_TYPE_P (TREE_TYPE (op_left))) | |
1793 | || !(truth_value_p (TREE_CODE (op_right)) | |
1794 | || INTEGRAL_TYPE_P (TREE_TYPE (op_right)))) | |
1795 | return; | |
1796 | ||
3c9aabbd MG |
1797 | /* The range computations only work with scalars. */ |
1798 | if (VECTOR_TYPE_P (TREE_TYPE (op_left)) | |
1799 | || VECTOR_TYPE_P (TREE_TYPE (op_right))) | |
1800 | return; | |
a243fb4a | 1801 | |
f2c4a785 MLI |
1802 | /* We first test whether either side separately is trivially true |
1803 | (with OR) or trivially false (with AND). If so, do not warn. | |
1804 | This is a common idiom for testing ranges of data types in | |
1805 | portable code. */ | |
1806 | lhs = make_range (op_left, &in0_p, &low0, &high0, &strict_overflow_p); | |
1807 | if (!lhs) | |
1808 | return; | |
1809 | if (TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) | |
a243fb4a MLI |
1810 | lhs = C_MAYBE_CONST_EXPR_EXPR (lhs); |
1811 | ||
f2c4a785 MLI |
1812 | /* If this is an OR operation, invert both sides; now, the result |
1813 | should be always false to get a warning. */ | |
1814 | if (or_op) | |
1815 | in0_p = !in0_p; | |
1816 | ||
1817 | tem = build_range_check (UNKNOWN_LOCATION, type, lhs, in0_p, low0, high0); | |
1e537948 | 1818 | if (tem && integer_zerop (tem)) |
f2c4a785 MLI |
1819 | return; |
1820 | ||
1821 | rhs = make_range (op_right, &in1_p, &low1, &high1, &strict_overflow_p); | |
1822 | if (!rhs) | |
1823 | return; | |
1824 | if (TREE_CODE (rhs) == C_MAYBE_CONST_EXPR) | |
a243fb4a | 1825 | rhs = C_MAYBE_CONST_EXPR_EXPR (rhs); |
b8698a0f | 1826 | |
f2c4a785 MLI |
1827 | /* If this is an OR operation, invert both sides; now, the result |
1828 | should be always false to get a warning. */ | |
a243fb4a | 1829 | if (or_op) |
f2c4a785 | 1830 | in1_p = !in1_p; |
b8698a0f | 1831 | |
f2c4a785 | 1832 | tem = build_range_check (UNKNOWN_LOCATION, type, rhs, in1_p, low1, high1); |
1e537948 | 1833 | if (tem && integer_zerop (tem)) |
f2c4a785 MLI |
1834 | return; |
1835 | ||
1836 | /* If both expressions have the same operand, if we can merge the | |
8c2b7f79 | 1837 | ranges, ... */ |
f2c4a785 | 1838 | if (operand_equal_p (lhs, rhs, 0) |
a243fb4a | 1839 | && merge_ranges (&in_p, &low, &high, in0_p, low0, high0, |
8c2b7f79 | 1840 | in1_p, low1, high1)) |
a243fb4a | 1841 | { |
8c2b7f79 MP |
1842 | tem = build_range_check (UNKNOWN_LOCATION, type, lhs, in_p, low, high); |
1843 | /* ... and if the range test is always false, then warn. */ | |
1844 | if (tem && integer_zerop (tem)) | |
1845 | { | |
1846 | if (or_op) | |
1847 | warning_at (location, OPT_Wlogical_op, | |
1848 | "logical %<or%> of collectively exhaustive tests is " | |
1849 | "always true"); | |
1850 | else | |
1851 | warning_at (location, OPT_Wlogical_op, | |
1852 | "logical %<and%> of mutually exclusive tests is " | |
1853 | "always false"); | |
1854 | } | |
1855 | /* Or warn if the operands have exactly the same range, e.g. | |
1856 | A > 0 && A > 0. */ | |
a68ae2e1 MP |
1857 | else if (tree_int_cst_equal (low0, low1) |
1858 | && tree_int_cst_equal (high0, high1)) | |
8c2b7f79 MP |
1859 | { |
1860 | if (or_op) | |
1861 | warning_at (location, OPT_Wlogical_op, | |
1862 | "logical %<or%> of equal expressions"); | |
1863 | else | |
1864 | warning_at (location, OPT_Wlogical_op, | |
1865 | "logical %<and%> of equal expressions"); | |
1866 | } | |
63a08740 DM |
1867 | } |
1868 | } | |
1869 | ||
05b28fd6 MP |
1870 | /* Helper function for warn_tautological_cmp. Look for ARRAY_REFs |
1871 | with constant indices. */ | |
1872 | ||
1873 | static tree | |
1874 | find_array_ref_with_const_idx_r (tree *expr_p, int *walk_subtrees, void *data) | |
1875 | { | |
1876 | tree expr = *expr_p; | |
1877 | ||
1878 | if ((TREE_CODE (expr) == ARRAY_REF | |
1879 | || TREE_CODE (expr) == ARRAY_RANGE_REF) | |
1880 | && TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST) | |
1881 | { | |
1882 | *(bool *) data = true; | |
1883 | *walk_subtrees = 0; | |
1884 | } | |
1885 | ||
1886 | return NULL_TREE; | |
1887 | } | |
1888 | ||
1889 | /* Warn if a self-comparison always evaluates to true or false. LOC | |
1890 | is the location of the comparison with code CODE, LHS and RHS are | |
1891 | operands of the comparison. */ | |
1892 | ||
1893 | void | |
1894 | warn_tautological_cmp (location_t loc, enum tree_code code, tree lhs, tree rhs) | |
1895 | { | |
1896 | if (TREE_CODE_CLASS (code) != tcc_comparison) | |
1897 | return; | |
1898 | ||
f2afe6dd MP |
1899 | /* Don't warn for various macro expansions. */ |
1900 | if (from_macro_expansion_at (loc) | |
1901 | || from_macro_expansion_at (EXPR_LOCATION (lhs)) | |
1902 | || from_macro_expansion_at (EXPR_LOCATION (rhs))) | |
1903 | return; | |
1904 | ||
05b28fd6 MP |
1905 | /* We do not warn for constants because they are typical of macro |
1906 | expansions that test for features, sizeof, and similar. */ | |
1907 | if (CONSTANT_CLASS_P (lhs) || CONSTANT_CLASS_P (rhs)) | |
1908 | return; | |
1909 | ||
1910 | /* Don't warn for e.g. | |
1911 | HOST_WIDE_INT n; | |
1912 | ... | |
1913 | if (n == (long) n) ... | |
1914 | */ | |
1915 | if ((CONVERT_EXPR_P (lhs) || TREE_CODE (lhs) == NON_LVALUE_EXPR) | |
1916 | || (CONVERT_EXPR_P (rhs) || TREE_CODE (rhs) == NON_LVALUE_EXPR)) | |
1917 | return; | |
1918 | ||
173864e8 MP |
1919 | /* Don't warn if either LHS or RHS has an IEEE floating-point type. |
1920 | It could be a NaN, and NaN never compares equal to anything, even | |
1921 | itself. */ | |
1922 | if (FLOAT_TYPE_P (TREE_TYPE (lhs)) || FLOAT_TYPE_P (TREE_TYPE (rhs))) | |
1923 | return; | |
1924 | ||
05b28fd6 MP |
1925 | if (operand_equal_p (lhs, rhs, 0)) |
1926 | { | |
1927 | /* Don't warn about array references with constant indices; | |
1928 | these are likely to come from a macro. */ | |
1929 | bool found = false; | |
1930 | walk_tree_without_duplicates (&lhs, find_array_ref_with_const_idx_r, | |
1931 | &found); | |
1932 | if (found) | |
1933 | return; | |
1934 | const bool always_true = (code == EQ_EXPR || code == LE_EXPR | |
1935 | || code == GE_EXPR || code == UNLE_EXPR | |
1936 | || code == UNGE_EXPR || code == UNEQ_EXPR); | |
1937 | if (always_true) | |
1938 | warning_at (loc, OPT_Wtautological_compare, | |
1939 | "self-comparison always evaluates to true"); | |
1940 | else | |
1941 | warning_at (loc, OPT_Wtautological_compare, | |
1942 | "self-comparison always evaluates to false"); | |
1943 | } | |
1944 | } | |
1945 | ||
742938c9 MP |
1946 | /* Warn about logical not used on the left hand side operand of a comparison. |
1947 | This function assumes that the LHS is inside of TRUTH_NOT_EXPR. | |
59ea0364 | 1948 | Do not warn if RHS is of a boolean type. */ |
742938c9 MP |
1949 | |
1950 | void | |
1951 | warn_logical_not_parentheses (location_t location, enum tree_code code, | |
59ea0364 | 1952 | tree rhs) |
742938c9 | 1953 | { |
59ea0364 MP |
1954 | if (TREE_CODE_CLASS (code) != tcc_comparison |
1955 | || TREE_TYPE (rhs) == NULL_TREE | |
1956 | || TREE_CODE (TREE_TYPE (rhs)) == BOOLEAN_TYPE) | |
742938c9 MP |
1957 | return; |
1958 | ||
7ccb1a11 JJ |
1959 | /* Don't warn for !x == 0 or !y != 0, those are equivalent to |
1960 | !(x == 0) or !(y != 0). */ | |
1961 | if ((code == EQ_EXPR || code == NE_EXPR) | |
1962 | && integer_zerop (rhs)) | |
1963 | return; | |
1964 | ||
742938c9 MP |
1965 | warning_at (location, OPT_Wlogical_not_parentheses, |
1966 | "logical not is only applied to the left hand side of " | |
1967 | "comparison"); | |
1968 | } | |
63a08740 | 1969 | |
fd4116f4 MLI |
1970 | /* Warn if EXP contains any computations whose results are not used. |
1971 | Return true if a warning is printed; false otherwise. LOCUS is the | |
1972 | (potential) location of the expression. */ | |
1973 | ||
1974 | bool | |
1975 | warn_if_unused_value (const_tree exp, location_t locus) | |
1976 | { | |
1977 | restart: | |
1978 | if (TREE_USED (exp) || TREE_NO_WARNING (exp)) | |
1979 | return false; | |
1980 | ||
1981 | /* Don't warn about void constructs. This includes casting to void, | |
1982 | void function calls, and statement expressions with a final cast | |
1983 | to void. */ | |
1984 | if (VOID_TYPE_P (TREE_TYPE (exp))) | |
1985 | return false; | |
1986 | ||
1987 | if (EXPR_HAS_LOCATION (exp)) | |
1988 | locus = EXPR_LOCATION (exp); | |
1989 | ||
1990 | switch (TREE_CODE (exp)) | |
1991 | { | |
1992 | case PREINCREMENT_EXPR: | |
1993 | case POSTINCREMENT_EXPR: | |
1994 | case PREDECREMENT_EXPR: | |
1995 | case POSTDECREMENT_EXPR: | |
1996 | case MODIFY_EXPR: | |
1997 | case INIT_EXPR: | |
1998 | case TARGET_EXPR: | |
1999 | case CALL_EXPR: | |
2000 | case TRY_CATCH_EXPR: | |
2001 | case WITH_CLEANUP_EXPR: | |
2002 | case EXIT_EXPR: | |
2003 | case VA_ARG_EXPR: | |
2004 | return false; | |
2005 | ||
2006 | case BIND_EXPR: | |
2007 | /* For a binding, warn if no side effect within it. */ | |
2008 | exp = BIND_EXPR_BODY (exp); | |
2009 | goto restart; | |
2010 | ||
2011 | case SAVE_EXPR: | |
2012 | case NON_LVALUE_EXPR: | |
007a787d | 2013 | case NOP_EXPR: |
fd4116f4 MLI |
2014 | exp = TREE_OPERAND (exp, 0); |
2015 | goto restart; | |
2016 | ||
2017 | case TRUTH_ORIF_EXPR: | |
2018 | case TRUTH_ANDIF_EXPR: | |
2019 | /* In && or ||, warn if 2nd operand has no side effect. */ | |
2020 | exp = TREE_OPERAND (exp, 1); | |
2021 | goto restart; | |
2022 | ||
2023 | case COMPOUND_EXPR: | |
2024 | if (warn_if_unused_value (TREE_OPERAND (exp, 0), locus)) | |
2025 | return true; | |
2026 | /* Let people do `(foo (), 0)' without a warning. */ | |
2027 | if (TREE_CONSTANT (TREE_OPERAND (exp, 1))) | |
2028 | return false; | |
2029 | exp = TREE_OPERAND (exp, 1); | |
2030 | goto restart; | |
2031 | ||
2032 | case COND_EXPR: | |
2033 | /* If this is an expression with side effects, don't warn; this | |
2034 | case commonly appears in macro expansions. */ | |
2035 | if (TREE_SIDE_EFFECTS (exp)) | |
2036 | return false; | |
2037 | goto warn; | |
2038 | ||
2039 | case INDIRECT_REF: | |
2040 | /* Don't warn about automatic dereferencing of references, since | |
2041 | the user cannot control it. */ | |
2042 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == REFERENCE_TYPE) | |
2043 | { | |
2044 | exp = TREE_OPERAND (exp, 0); | |
2045 | goto restart; | |
2046 | } | |
2047 | /* Fall through. */ | |
2048 | ||
2049 | default: | |
2050 | /* Referencing a volatile value is a side effect, so don't warn. */ | |
2051 | if ((DECL_P (exp) || REFERENCE_CLASS_P (exp)) | |
2052 | && TREE_THIS_VOLATILE (exp)) | |
2053 | return false; | |
2054 | ||
2055 | /* If this is an expression which has no operands, there is no value | |
2056 | to be unused. There are no such language-independent codes, | |
2057 | but front ends may define such. */ | |
2058 | if (EXPRESSION_CLASS_P (exp) && TREE_OPERAND_LENGTH (exp) == 0) | |
2059 | return false; | |
2060 | ||
2061 | warn: | |
2062 | return warning_at (locus, OPT_Wunused_value, "value computed is not used"); | |
2063 | } | |
2064 | } | |
2065 | ||
2066 | ||
de9c56a4 RG |
2067 | /* Print a warning about casts that might indicate violation |
2068 | of strict aliasing rules if -Wstrict-aliasing is used and | |
3f0a2a47 DM |
2069 | strict aliasing mode is in effect. OTYPE is the original |
2070 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
de9c56a4 | 2071 | |
79bedddc | 2072 | bool |
3f0a2a47 | 2073 | strict_aliasing_warning (tree otype, tree type, tree expr) |
de9c56a4 | 2074 | { |
255d3827 RG |
2075 | /* Strip pointer conversion chains and get to the correct original type. */ |
2076 | STRIP_NOPS (expr); | |
2077 | otype = TREE_TYPE (expr); | |
2078 | ||
ac7ee6ad RG |
2079 | if (!(flag_strict_aliasing |
2080 | && POINTER_TYPE_P (type) | |
2081 | && POINTER_TYPE_P (otype) | |
2082 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2083 | /* If the type we are casting to is a ref-all pointer | |
2084 | dereferencing it is always valid. */ | |
2085 | || TYPE_REF_CAN_ALIAS_ALL (type)) | |
79bedddc SR |
2086 | return false; |
2087 | ||
2088 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
de9c56a4 | 2089 | && (DECL_P (TREE_OPERAND (expr, 0)) |
79bedddc | 2090 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
de9c56a4 RG |
2091 | { |
2092 | /* Casting the address of an object to non void pointer. Warn | |
2093 | if the cast breaks type based aliasing. */ | |
79bedddc SR |
2094 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
2095 | { | |
2096 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
2097 | "might break strict-aliasing rules"); | |
2098 | return true; | |
2099 | } | |
de9c56a4 RG |
2100 | else |
2101 | { | |
b8698a0f | 2102 | /* warn_strict_aliasing >= 3. This includes the default (3). |
79bedddc | 2103 | Only warn if the cast is dereferenced immediately. */ |
4862826d | 2104 | alias_set_type set1 = |
79bedddc | 2105 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
4862826d | 2106 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
de9c56a4 | 2107 | |
4653cae5 RG |
2108 | if (set1 != set2 && set2 != 0 |
2109 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
79bedddc SR |
2110 | { |
2111 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2112 | "pointer will break strict-aliasing rules"); | |
2113 | return true; | |
2114 | } | |
2115 | else if (warn_strict_aliasing == 2 | |
836f7794 | 2116 | && !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
2117 | { |
2118 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2119 | "pointer might break strict-aliasing rules"); | |
2120 | return true; | |
2121 | } | |
de9c56a4 RG |
2122 | } |
2123 | } | |
79bedddc SR |
2124 | else |
2125 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
2126 | { | |
2127 | /* At this level, warn for any conversions, even if an address is | |
2128 | not taken in the same statement. This will likely produce many | |
2129 | false positives, but could be useful to pinpoint problems that | |
2130 | are not revealed at higher levels. */ | |
4862826d ILT |
2131 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
2132 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
2133 | if (!COMPLETE_TYPE_P (type) | |
836f7794 | 2134 | || !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
2135 | { |
2136 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2137 | "pointer might break strict-aliasing rules"); | |
2138 | return true; | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | return false; | |
de9c56a4 RG |
2143 | } |
2144 | ||
1a4049e7 JJ |
2145 | /* Warn about memset (&a, 0, sizeof (&a)); and similar mistakes with |
2146 | sizeof as last operand of certain builtins. */ | |
2147 | ||
2148 | void | |
3a785c97 | 2149 | sizeof_pointer_memaccess_warning (location_t *sizeof_arg_loc, tree callee, |
9771b263 | 2150 | vec<tree, va_gc> *params, tree *sizeof_arg, |
1a4049e7 JJ |
2151 | bool (*comp_types) (tree, tree)) |
2152 | { | |
2153 | tree type, dest = NULL_TREE, src = NULL_TREE, tem; | |
3a785c97 JJ |
2154 | bool strop = false, cmp = false; |
2155 | unsigned int idx = ~0; | |
2156 | location_t loc; | |
1a4049e7 JJ |
2157 | |
2158 | if (TREE_CODE (callee) != FUNCTION_DECL | |
2159 | || DECL_BUILT_IN_CLASS (callee) != BUILT_IN_NORMAL | |
9771b263 | 2160 | || vec_safe_length (params) <= 1) |
1a4049e7 JJ |
2161 | return; |
2162 | ||
1a4049e7 JJ |
2163 | switch (DECL_FUNCTION_CODE (callee)) |
2164 | { | |
2165 | case BUILT_IN_STRNCMP: | |
2166 | case BUILT_IN_STRNCASECMP: | |
3a785c97 JJ |
2167 | cmp = true; |
2168 | /* FALLTHRU */ | |
1a4049e7 | 2169 | case BUILT_IN_STRNCPY: |
3a785c97 | 2170 | case BUILT_IN_STRNCPY_CHK: |
1a4049e7 | 2171 | case BUILT_IN_STRNCAT: |
3a785c97 JJ |
2172 | case BUILT_IN_STRNCAT_CHK: |
2173 | case BUILT_IN_STPNCPY: | |
2174 | case BUILT_IN_STPNCPY_CHK: | |
1a4049e7 JJ |
2175 | strop = true; |
2176 | /* FALLTHRU */ | |
2177 | case BUILT_IN_MEMCPY: | |
3a785c97 | 2178 | case BUILT_IN_MEMCPY_CHK: |
1a4049e7 | 2179 | case BUILT_IN_MEMMOVE: |
3a785c97 | 2180 | case BUILT_IN_MEMMOVE_CHK: |
9771b263 | 2181 | if (params->length () < 3) |
3a785c97 | 2182 | return; |
9771b263 DN |
2183 | src = (*params)[1]; |
2184 | dest = (*params)[0]; | |
3a785c97 JJ |
2185 | idx = 2; |
2186 | break; | |
2187 | case BUILT_IN_BCOPY: | |
9771b263 | 2188 | if (params->length () < 3) |
3a785c97 | 2189 | return; |
9771b263 DN |
2190 | src = (*params)[0]; |
2191 | dest = (*params)[1]; | |
3a785c97 JJ |
2192 | idx = 2; |
2193 | break; | |
1a4049e7 | 2194 | case BUILT_IN_MEMCMP: |
3a785c97 | 2195 | case BUILT_IN_BCMP: |
9771b263 | 2196 | if (params->length () < 3) |
1a4049e7 | 2197 | return; |
9771b263 DN |
2198 | src = (*params)[1]; |
2199 | dest = (*params)[0]; | |
3a785c97 JJ |
2200 | idx = 2; |
2201 | cmp = true; | |
1a4049e7 JJ |
2202 | break; |
2203 | case BUILT_IN_MEMSET: | |
3a785c97 | 2204 | case BUILT_IN_MEMSET_CHK: |
9771b263 | 2205 | if (params->length () < 3) |
1a4049e7 | 2206 | return; |
9771b263 | 2207 | dest = (*params)[0]; |
3a785c97 JJ |
2208 | idx = 2; |
2209 | break; | |
2210 | case BUILT_IN_BZERO: | |
9771b263 | 2211 | dest = (*params)[0]; |
3a785c97 | 2212 | idx = 1; |
1a4049e7 JJ |
2213 | break; |
2214 | case BUILT_IN_STRNDUP: | |
9771b263 | 2215 | src = (*params)[0]; |
1a4049e7 | 2216 | strop = true; |
3a785c97 JJ |
2217 | idx = 1; |
2218 | break; | |
2219 | case BUILT_IN_MEMCHR: | |
9771b263 | 2220 | if (params->length () < 3) |
3a785c97 | 2221 | return; |
9771b263 | 2222 | src = (*params)[0]; |
3a785c97 JJ |
2223 | idx = 2; |
2224 | break; | |
2225 | case BUILT_IN_SNPRINTF: | |
2226 | case BUILT_IN_SNPRINTF_CHK: | |
2227 | case BUILT_IN_VSNPRINTF: | |
2228 | case BUILT_IN_VSNPRINTF_CHK: | |
9771b263 | 2229 | dest = (*params)[0]; |
3a785c97 JJ |
2230 | idx = 1; |
2231 | strop = true; | |
1a4049e7 JJ |
2232 | break; |
2233 | default: | |
2234 | break; | |
2235 | } | |
2236 | ||
3a785c97 JJ |
2237 | if (idx >= 3) |
2238 | return; | |
2239 | ||
2240 | if (sizeof_arg[idx] == NULL || sizeof_arg[idx] == error_mark_node) | |
2241 | return; | |
2242 | ||
2243 | type = TYPE_P (sizeof_arg[idx]) | |
2244 | ? sizeof_arg[idx] : TREE_TYPE (sizeof_arg[idx]); | |
2245 | if (!POINTER_TYPE_P (type)) | |
2246 | return; | |
2247 | ||
1a4049e7 JJ |
2248 | if (dest |
2249 | && (tem = tree_strip_nop_conversions (dest)) | |
2250 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2251 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2252 | return; | |
2253 | ||
2254 | if (src | |
2255 | && (tem = tree_strip_nop_conversions (src)) | |
2256 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2257 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2258 | return; | |
2259 | ||
3a785c97 JJ |
2260 | loc = sizeof_arg_loc[idx]; |
2261 | ||
2262 | if (dest && !cmp) | |
1a4049e7 | 2263 | { |
3a785c97 JJ |
2264 | if (!TYPE_P (sizeof_arg[idx]) |
2265 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
1a4049e7 JJ |
2266 | && comp_types (TREE_TYPE (dest), type)) |
2267 | { | |
3a785c97 | 2268 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
1a4049e7 JJ |
2269 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2270 | "argument to %<sizeof%> in %qD call is the same " | |
2271 | "expression as the destination; did you mean to " | |
2272 | "remove the addressof?", callee); | |
2273 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2274 | == TYPE_PRECISION (char_type_node)) | |
2275 | || strop) | |
2276 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2277 | "argument to %<sizeof%> in %qD call is the same " | |
2278 | "expression as the destination; did you mean to " | |
2279 | "provide an explicit length?", callee); | |
2280 | else | |
2281 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2282 | "argument to %<sizeof%> in %qD call is the same " | |
2283 | "expression as the destination; did you mean to " | |
2284 | "dereference it?", callee); | |
2285 | return; | |
2286 | } | |
2287 | ||
2288 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2289 | && !strop | |
2290 | && comp_types (TREE_TYPE (dest), type) | |
2291 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2292 | { | |
2293 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2294 | "argument to %<sizeof%> in %qD call is the same " | |
2295 | "pointer type %qT as the destination; expected %qT " | |
2296 | "or an explicit length", callee, TREE_TYPE (dest), | |
2297 | TREE_TYPE (TREE_TYPE (dest))); | |
2298 | return; | |
2299 | } | |
2300 | } | |
2301 | ||
3a785c97 | 2302 | if (src && !cmp) |
1a4049e7 | 2303 | { |
3a785c97 JJ |
2304 | if (!TYPE_P (sizeof_arg[idx]) |
2305 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
1a4049e7 JJ |
2306 | && comp_types (TREE_TYPE (src), type)) |
2307 | { | |
3a785c97 | 2308 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
1a4049e7 JJ |
2309 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2310 | "argument to %<sizeof%> in %qD call is the same " | |
2311 | "expression as the source; did you mean to " | |
2312 | "remove the addressof?", callee); | |
2313 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2314 | == TYPE_PRECISION (char_type_node)) | |
2315 | || strop) | |
2316 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2317 | "argument to %<sizeof%> in %qD call is the same " | |
2318 | "expression as the source; did you mean to " | |
2319 | "provide an explicit length?", callee); | |
2320 | else | |
2321 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2322 | "argument to %<sizeof%> in %qD call is the same " | |
2323 | "expression as the source; did you mean to " | |
2324 | "dereference it?", callee); | |
2325 | return; | |
2326 | } | |
2327 | ||
2328 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2329 | && !strop | |
2330 | && comp_types (TREE_TYPE (src), type) | |
2331 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2332 | { | |
2333 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2334 | "argument to %<sizeof%> in %qD call is the same " | |
2335 | "pointer type %qT as the source; expected %qT " | |
2336 | "or an explicit length", callee, TREE_TYPE (src), | |
2337 | TREE_TYPE (TREE_TYPE (src))); | |
2338 | return; | |
2339 | } | |
2340 | } | |
3a785c97 JJ |
2341 | |
2342 | if (dest) | |
2343 | { | |
2344 | if (!TYPE_P (sizeof_arg[idx]) | |
2345 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
2346 | && comp_types (TREE_TYPE (dest), type)) | |
2347 | { | |
2348 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2349 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2350 | "argument to %<sizeof%> in %qD call is the same " | |
2351 | "expression as the first source; did you mean to " | |
2352 | "remove the addressof?", callee); | |
2353 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2354 | == TYPE_PRECISION (char_type_node)) | |
2355 | || strop) | |
2356 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2357 | "argument to %<sizeof%> in %qD call is the same " | |
2358 | "expression as the first source; did you mean to " | |
2359 | "provide an explicit length?", callee); | |
2360 | else | |
2361 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2362 | "argument to %<sizeof%> in %qD call is the same " | |
2363 | "expression as the first source; did you mean to " | |
2364 | "dereference it?", callee); | |
2365 | return; | |
2366 | } | |
2367 | ||
2368 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2369 | && !strop | |
2370 | && comp_types (TREE_TYPE (dest), type) | |
2371 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2372 | { | |
2373 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2374 | "argument to %<sizeof%> in %qD call is the same " | |
2375 | "pointer type %qT as the first source; expected %qT " | |
2376 | "or an explicit length", callee, TREE_TYPE (dest), | |
2377 | TREE_TYPE (TREE_TYPE (dest))); | |
2378 | return; | |
2379 | } | |
2380 | } | |
2381 | ||
2382 | if (src) | |
2383 | { | |
2384 | if (!TYPE_P (sizeof_arg[idx]) | |
2385 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
2386 | && comp_types (TREE_TYPE (src), type)) | |
2387 | { | |
2388 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2389 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2390 | "argument to %<sizeof%> in %qD call is the same " | |
2391 | "expression as the second source; did you mean to " | |
2392 | "remove the addressof?", callee); | |
2393 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2394 | == TYPE_PRECISION (char_type_node)) | |
2395 | || strop) | |
2396 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2397 | "argument to %<sizeof%> in %qD call is the same " | |
2398 | "expression as the second source; did you mean to " | |
2399 | "provide an explicit length?", callee); | |
2400 | else | |
2401 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2402 | "argument to %<sizeof%> in %qD call is the same " | |
2403 | "expression as the second source; did you mean to " | |
2404 | "dereference it?", callee); | |
2405 | return; | |
2406 | } | |
2407 | ||
2408 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2409 | && !strop | |
2410 | && comp_types (TREE_TYPE (src), type) | |
2411 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2412 | { | |
2413 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2414 | "argument to %<sizeof%> in %qD call is the same " | |
2415 | "pointer type %qT as the second source; expected %qT " | |
2416 | "or an explicit length", callee, TREE_TYPE (src), | |
2417 | TREE_TYPE (TREE_TYPE (src))); | |
2418 | return; | |
2419 | } | |
2420 | } | |
2421 | ||
1a4049e7 JJ |
2422 | } |
2423 | ||
a1e45ff0 DM |
2424 | /* Warn for unlikely, improbable, or stupid DECL declarations |
2425 | of `main'. */ | |
2426 | ||
2427 | void | |
2428 | check_main_parameter_types (tree decl) | |
2429 | { | |
e19a18d4 NF |
2430 | function_args_iterator iter; |
2431 | tree type; | |
a1e45ff0 DM |
2432 | int argct = 0; |
2433 | ||
e19a18d4 NF |
2434 | FOREACH_FUNCTION_ARGS (TREE_TYPE (decl), type, iter) |
2435 | { | |
2436 | /* XXX void_type_node belies the abstraction. */ | |
2437 | if (type == void_type_node || type == error_mark_node ) | |
2438 | break; | |
2439 | ||
f827930a MP |
2440 | tree t = type; |
2441 | if (TYPE_ATOMIC (t)) | |
2442 | pedwarn (input_location, OPT_Wmain, | |
2443 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2444 | type, decl); | |
2445 | while (POINTER_TYPE_P (t)) | |
2446 | { | |
2447 | t = TREE_TYPE (t); | |
2448 | if (TYPE_ATOMIC (t)) | |
2449 | pedwarn (input_location, OPT_Wmain, | |
2450 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2451 | type, decl); | |
2452 | } | |
2453 | ||
e19a18d4 NF |
2454 | ++argct; |
2455 | switch (argct) | |
2456 | { | |
2457 | case 1: | |
2458 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
2459 | pedwarn (input_location, OPT_Wmain, | |
2460 | "first argument of %q+D should be %<int%>", decl); | |
2461 | break; | |
2462 | ||
2463 | case 2: | |
2464 | if (TREE_CODE (type) != POINTER_TYPE | |
2465 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2466 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2467 | != char_type_node)) | |
2468 | pedwarn (input_location, OPT_Wmain, | |
2469 | "second argument of %q+D should be %<char **%>", decl); | |
2470 | break; | |
2471 | ||
2472 | case 3: | |
2473 | if (TREE_CODE (type) != POINTER_TYPE | |
2474 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2475 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2476 | != char_type_node)) | |
2477 | pedwarn (input_location, OPT_Wmain, | |
2478 | "third argument of %q+D should probably be " | |
2479 | "%<char **%>", decl); | |
2480 | break; | |
2481 | } | |
2482 | } | |
a1e45ff0 DM |
2483 | |
2484 | /* It is intentional that this message does not mention the third | |
2485 | argument because it's only mentioned in an appendix of the | |
2486 | standard. */ | |
2487 | if (argct > 0 && (argct < 2 || argct > 3)) | |
e19a18d4 NF |
2488 | pedwarn (input_location, OPT_Wmain, |
2489 | "%q+D takes only zero or two arguments", decl); | |
38e514c0 MP |
2490 | |
2491 | if (stdarg_p (TREE_TYPE (decl))) | |
2492 | pedwarn (input_location, OPT_Wmain, | |
2493 | "%q+D declared as variadic function", decl); | |
a1e45ff0 DM |
2494 | } |
2495 | ||
0af94e6f JR |
2496 | /* vector_targets_convertible_p is used for vector pointer types. The |
2497 | callers perform various checks that the qualifiers are satisfactory, | |
2498 | while OTOH vector_targets_convertible_p ignores the number of elements | |
2499 | in the vectors. That's fine with vector pointers as we can consider, | |
2500 | say, a vector of 8 elements as two consecutive vectors of 4 elements, | |
2501 | and that does not require and conversion of the pointer values. | |
2502 | In contrast, vector_types_convertible_p and | |
2503 | vector_types_compatible_elements_p are used for vector value types. */ | |
f83c7f63 DJ |
2504 | /* True if pointers to distinct types T1 and T2 can be converted to |
2505 | each other without an explicit cast. Only returns true for opaque | |
2506 | vector types. */ | |
2507 | bool | |
2508 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
2509 | { | |
31521951 | 2510 | if (VECTOR_TYPE_P (t1) && VECTOR_TYPE_P (t2) |
b6fc2cdb | 2511 | && (TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
f83c7f63 DJ |
2512 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2513 | return true; | |
2514 | ||
2515 | return false; | |
2516 | } | |
2517 | ||
0af94e6f JR |
2518 | /* vector_types_convertible_p is used for vector value types. |
2519 | It could in principle call vector_targets_convertible_p as a subroutine, | |
2520 | but then the check for vector type would be duplicated with its callers, | |
2521 | and also the purpose of vector_targets_convertible_p would become | |
2522 | muddled. | |
2523 | Where vector_types_convertible_p returns true, a conversion might still be | |
2524 | needed to make the types match. | |
2525 | In contrast, vector_targets_convertible_p is used for vector pointer | |
2526 | values, and vector_types_compatible_elements_p is used specifically | |
2527 | in the context for binary operators, as a check if use is possible without | |
2528 | conversion. */ | |
00c8e9f6 MS |
2529 | /* True if vector types T1 and T2 can be converted to each other |
2530 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
2531 | can only be converted with -flax-vector-conversions yet that is not | |
2532 | in effect, emit a note telling the user about that option if such | |
2533 | a note has not previously been emitted. */ | |
2534 | bool | |
58f9752a | 2535 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
cc27e657 | 2536 | { |
00c8e9f6 | 2537 | static bool emitted_lax_note = false; |
14e765da JM |
2538 | bool convertible_lax; |
2539 | ||
b6fc2cdb | 2540 | if ((TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
14e765da JM |
2541 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2542 | return true; | |
2543 | ||
2544 | convertible_lax = | |
2545 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
2546 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
a5e0cd1d | 2547 | TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2)) |
14e765da JM |
2548 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) |
2549 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
00c8e9f6 MS |
2550 | |
2551 | if (!convertible_lax || flag_lax_vector_conversions) | |
2552 | return convertible_lax; | |
2553 | ||
2554 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
cf7bc668 | 2555 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
00c8e9f6 MS |
2556 | return true; |
2557 | ||
2558 | if (emit_lax_note && !emitted_lax_note) | |
2559 | { | |
2560 | emitted_lax_note = true; | |
1f5b3869 | 2561 | inform (input_location, "use -flax-vector-conversions to permit " |
00c8e9f6 MS |
2562 | "conversions between vectors with differing " |
2563 | "element types or numbers of subparts"); | |
2564 | } | |
2565 | ||
2566 | return false; | |
cc27e657 PB |
2567 | } |
2568 | ||
9e1a8dd1 RR |
2569 | /* Build a VEC_PERM_EXPR if V0, V1 and MASK are not error_mark_nodes |
2570 | and have vector types, V0 has the same type as V1, and the number of | |
2571 | elements of V0, V1, MASK is the same. | |
2572 | ||
2573 | In case V1 is a NULL_TREE it is assumed that __builtin_shuffle was | |
2574 | called with two arguments. In this case implementation passes the | |
2575 | first argument twice in order to share the same tree code. This fact | |
2576 | could enable the mask-values being twice the vector length. This is | |
2577 | an implementation accident and this semantics is not guaranteed to | |
2578 | the user. */ | |
2579 | tree | |
bedc293e MG |
2580 | c_build_vec_perm_expr (location_t loc, tree v0, tree v1, tree mask, |
2581 | bool complain) | |
9e1a8dd1 RR |
2582 | { |
2583 | tree ret; | |
2584 | bool wrap = true; | |
2585 | bool maybe_const = false; | |
2586 | bool two_arguments = false; | |
2587 | ||
2588 | if (v1 == NULL_TREE) | |
2589 | { | |
2590 | two_arguments = true; | |
2591 | v1 = v0; | |
2592 | } | |
2593 | ||
2594 | if (v0 == error_mark_node || v1 == error_mark_node | |
2595 | || mask == error_mark_node) | |
2596 | return error_mark_node; | |
2597 | ||
31521951 | 2598 | if (!VECTOR_INTEGER_TYPE_P (TREE_TYPE (mask))) |
9e1a8dd1 | 2599 | { |
bedc293e MG |
2600 | if (complain) |
2601 | error_at (loc, "__builtin_shuffle last argument must " | |
2602 | "be an integer vector"); | |
9e1a8dd1 RR |
2603 | return error_mark_node; |
2604 | } | |
2605 | ||
31521951 MP |
2606 | if (!VECTOR_TYPE_P (TREE_TYPE (v0)) |
2607 | || !VECTOR_TYPE_P (TREE_TYPE (v1))) | |
9e1a8dd1 | 2608 | { |
bedc293e MG |
2609 | if (complain) |
2610 | error_at (loc, "__builtin_shuffle arguments must be vectors"); | |
9e1a8dd1 RR |
2611 | return error_mark_node; |
2612 | } | |
2613 | ||
2614 | if (TYPE_MAIN_VARIANT (TREE_TYPE (v0)) != TYPE_MAIN_VARIANT (TREE_TYPE (v1))) | |
2615 | { | |
bedc293e MG |
2616 | if (complain) |
2617 | error_at (loc, "__builtin_shuffle argument vectors must be of " | |
2618 | "the same type"); | |
9e1a8dd1 RR |
2619 | return error_mark_node; |
2620 | } | |
2621 | ||
2622 | if (TYPE_VECTOR_SUBPARTS (TREE_TYPE (v0)) | |
2623 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask)) | |
2624 | && TYPE_VECTOR_SUBPARTS (TREE_TYPE (v1)) | |
2625 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask))) | |
2626 | { | |
bedc293e MG |
2627 | if (complain) |
2628 | error_at (loc, "__builtin_shuffle number of elements of the " | |
2629 | "argument vector(s) and the mask vector should " | |
2630 | "be the same"); | |
9e1a8dd1 RR |
2631 | return error_mark_node; |
2632 | } | |
2633 | ||
2634 | if (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (v0)))) | |
2635 | != GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (mask))))) | |
2636 | { | |
bedc293e MG |
2637 | if (complain) |
2638 | error_at (loc, "__builtin_shuffle argument vector(s) inner type " | |
2639 | "must have the same size as inner type of the mask"); | |
9e1a8dd1 RR |
2640 | return error_mark_node; |
2641 | } | |
2642 | ||
2643 | if (!c_dialect_cxx ()) | |
2644 | { | |
2645 | /* Avoid C_MAYBE_CONST_EXPRs inside VEC_PERM_EXPR. */ | |
2646 | v0 = c_fully_fold (v0, false, &maybe_const); | |
2647 | wrap &= maybe_const; | |
2648 | ||
2649 | if (two_arguments) | |
2650 | v1 = v0 = save_expr (v0); | |
2651 | else | |
2652 | { | |
2653 | v1 = c_fully_fold (v1, false, &maybe_const); | |
2654 | wrap &= maybe_const; | |
2655 | } | |
2656 | ||
2657 | mask = c_fully_fold (mask, false, &maybe_const); | |
2658 | wrap &= maybe_const; | |
2659 | } | |
bedc293e MG |
2660 | else if (two_arguments) |
2661 | v1 = v0 = save_expr (v0); | |
9e1a8dd1 RR |
2662 | |
2663 | ret = build3_loc (loc, VEC_PERM_EXPR, TREE_TYPE (v0), v0, v1, mask); | |
2664 | ||
2665 | if (!c_dialect_cxx () && !wrap) | |
2666 | ret = c_wrap_maybe_const (ret, true); | |
2667 | ||
2668 | return ret; | |
2669 | } | |
2670 | ||
828fb3ba JM |
2671 | /* Like tree.c:get_narrower, but retain conversion from C++0x scoped enum |
2672 | to integral type. */ | |
2673 | ||
2674 | static tree | |
2675 | c_common_get_narrower (tree op, int *unsignedp_ptr) | |
2676 | { | |
2677 | op = get_narrower (op, unsignedp_ptr); | |
2678 | ||
2679 | if (TREE_CODE (TREE_TYPE (op)) == ENUMERAL_TYPE | |
2680 | && ENUM_IS_SCOPED (TREE_TYPE (op))) | |
2681 | { | |
2682 | /* C++0x scoped enumerations don't implicitly convert to integral | |
2683 | type; if we stripped an explicit conversion to a larger type we | |
2684 | need to replace it so common_type will still work. */ | |
21fa2faf RG |
2685 | tree type = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op)), |
2686 | TYPE_UNSIGNED (TREE_TYPE (op))); | |
828fb3ba JM |
2687 | op = fold_convert (type, op); |
2688 | } | |
2689 | return op; | |
2690 | } | |
2691 | ||
6715192c MLI |
2692 | /* This is a helper function of build_binary_op. |
2693 | ||
2694 | For certain operations if both args were extended from the same | |
2695 | smaller type, do the arithmetic in that type and then extend. | |
2696 | ||
2697 | BITWISE indicates a bitwise operation. | |
2698 | For them, this optimization is safe only if | |
2699 | both args are zero-extended or both are sign-extended. | |
2700 | Otherwise, we might change the result. | |
2701 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
b8698a0f | 2702 | but calculated in (unsigned short) it would be (unsigned short)-1. |
6715192c | 2703 | */ |
828fb3ba JM |
2704 | tree |
2705 | shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
6715192c MLI |
2706 | { |
2707 | int unsigned0, unsigned1; | |
2708 | tree arg0, arg1; | |
2709 | int uns; | |
2710 | tree type; | |
2711 | ||
2712 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
2713 | excessive narrowing when we call get_narrower below. For | |
2714 | example, suppose that OP0 is of unsigned int extended | |
2715 | from signed char and that RESULT_TYPE is long long int. | |
2716 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
2717 | like | |
b8698a0f | 2718 | |
6715192c MLI |
2719 | (long long int) (unsigned int) signed_char |
2720 | ||
2721 | which get_narrower would narrow down to | |
b8698a0f | 2722 | |
6715192c | 2723 | (unsigned int) signed char |
b8698a0f | 2724 | |
6715192c MLI |
2725 | If we do not cast OP0 first, get_narrower would return |
2726 | signed_char, which is inconsistent with the case of the | |
2727 | explicit cast. */ | |
2728 | op0 = convert (result_type, op0); | |
2729 | op1 = convert (result_type, op1); | |
2730 | ||
828fb3ba JM |
2731 | arg0 = c_common_get_narrower (op0, &unsigned0); |
2732 | arg1 = c_common_get_narrower (op1, &unsigned1); | |
6715192c MLI |
2733 | |
2734 | /* UNS is 1 if the operation to be done is an unsigned one. */ | |
2735 | uns = TYPE_UNSIGNED (result_type); | |
2736 | ||
2737 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
2738 | but it *requires* conversion to FINAL_TYPE. */ | |
b8698a0f | 2739 | |
6715192c MLI |
2740 | if ((TYPE_PRECISION (TREE_TYPE (op0)) |
2741 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2742 | && TREE_TYPE (op0) != result_type) | |
2743 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
2744 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
2745 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
2746 | && TREE_TYPE (op1) != result_type) | |
2747 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
b8698a0f | 2748 | |
6715192c | 2749 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ |
b8698a0f | 2750 | |
6715192c MLI |
2751 | /* For bitwise operations, signedness of nominal type |
2752 | does not matter. Consider only how operands were extended. */ | |
2753 | if (bitwise) | |
2754 | uns = unsigned0; | |
b8698a0f | 2755 | |
6715192c MLI |
2756 | /* Note that in all three cases below we refrain from optimizing |
2757 | an unsigned operation on sign-extended args. | |
2758 | That would not be valid. */ | |
b8698a0f | 2759 | |
6715192c MLI |
2760 | /* Both args variable: if both extended in same way |
2761 | from same width, do it in that width. | |
2762 | Do it unsigned if args were zero-extended. */ | |
2763 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
2764 | < TYPE_PRECISION (result_type)) | |
2765 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2766 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2767 | && unsigned0 == unsigned1 | |
2768 | && (unsigned0 || !uns)) | |
2769 | return c_common_signed_or_unsigned_type | |
2770 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
2771 | ||
2772 | else if (TREE_CODE (arg0) == INTEGER_CST | |
2773 | && (unsigned1 || !uns) | |
2774 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2775 | < TYPE_PRECISION (result_type)) | |
2776 | && (type | |
2777 | = c_common_signed_or_unsigned_type (unsigned1, | |
2778 | TREE_TYPE (arg1))) | |
2779 | && !POINTER_TYPE_P (type) | |
2780 | && int_fits_type_p (arg0, type)) | |
2781 | return type; | |
2782 | ||
2783 | else if (TREE_CODE (arg1) == INTEGER_CST | |
2784 | && (unsigned0 || !uns) | |
2785 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
2786 | < TYPE_PRECISION (result_type)) | |
2787 | && (type | |
2788 | = c_common_signed_or_unsigned_type (unsigned0, | |
2789 | TREE_TYPE (arg0))) | |
2790 | && !POINTER_TYPE_P (type) | |
2791 | && int_fits_type_p (arg1, type)) | |
2792 | return type; | |
2793 | ||
2794 | return result_type; | |
2795 | } | |
2796 | ||
7a37fa90 MM |
2797 | /* Returns true iff any integer value of type FROM_TYPE can be represented as |
2798 | real of type TO_TYPE. This is a helper function for unsafe_conversion_p. */ | |
2799 | ||
2800 | static bool | |
2801 | int_safely_convertible_to_real_p (const_tree from_type, const_tree to_type) | |
2802 | { | |
2803 | tree type_low_bound = TYPE_MIN_VALUE (from_type); | |
2804 | tree type_high_bound = TYPE_MAX_VALUE (from_type); | |
2805 | REAL_VALUE_TYPE real_low_bound = | |
2806 | real_value_from_int_cst (0, type_low_bound); | |
2807 | REAL_VALUE_TYPE real_high_bound = | |
2808 | real_value_from_int_cst (0, type_high_bound); | |
2809 | ||
2810 | return exact_real_truncate (TYPE_MODE (to_type), &real_low_bound) | |
2811 | && exact_real_truncate (TYPE_MODE (to_type), &real_high_bound); | |
2812 | } | |
2813 | ||
2814 | /* Checks if expression EXPR of complex/real/integer type cannot be converted | |
2815 | to the complex/real/integer type TYPE. Function returns non-zero when: | |
68fca595 MP |
2816 | * EXPR is a constant which cannot be exactly converted to TYPE. |
2817 | * EXPR is not a constant and size of EXPR's type > than size of TYPE, | |
7a37fa90 MM |
2818 | for EXPR type and TYPE being both integers or both real, or both |
2819 | complex. | |
2820 | * EXPR is not a constant of complex type and TYPE is a real or | |
2821 | an integer. | |
68fca595 MP |
2822 | * EXPR is not a constant of real type and TYPE is an integer. |
2823 | * EXPR is not a constant of integer type which cannot be | |
2824 | exactly converted to real type. | |
7a37fa90 | 2825 | |
0e3a99ae | 2826 | Function allows conversions between types of different signedness and |
49b0aa18 | 2827 | can return SAFE_CONVERSION (zero) in that case. Function can produce |
7a37fa90 MM |
2828 | signedness warnings if PRODUCE_WARNS is true. |
2829 | ||
2830 | Function allows conversions from complex constants to non-complex types, | |
2831 | provided that imaginary part is zero and real part can be safely converted | |
2832 | to TYPE. */ | |
68fca595 | 2833 | |
49b0aa18 | 2834 | enum conversion_safety |
68fca595 | 2835 | unsafe_conversion_p (location_t loc, tree type, tree expr, bool produce_warns) |
422c3a54 | 2836 | { |
49b0aa18 | 2837 | enum conversion_safety give_warning = SAFE_CONVERSION; /* is 0 or false */ |
374035cb | 2838 | tree expr_type = TREE_TYPE (expr); |
68fca595 | 2839 | loc = expansion_point_location_if_in_system_header (loc); |
422c3a54 | 2840 | |
0e3a99ae | 2841 | if (TREE_CODE (expr) == REAL_CST || TREE_CODE (expr) == INTEGER_CST) |
0011dedb | 2842 | { |
7a37fa90 MM |
2843 | /* If type is complex, we are interested in compatibility with |
2844 | underlying type. */ | |
2845 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
2846 | type = TREE_TYPE (type); | |
2847 | ||
422c3a54 | 2848 | /* Warn for real constant that is not an exact integer converted |
0e3a99ae | 2849 | to integer type. */ |
374035cb | 2850 | if (TREE_CODE (expr_type) == REAL_TYPE |
0e3a99ae AS |
2851 | && TREE_CODE (type) == INTEGER_TYPE) |
2852 | { | |
2853 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) | |
49b0aa18 | 2854 | give_warning = UNSAFE_REAL; |
0e3a99ae | 2855 | } |
91c41804 | 2856 | /* Warn for an integer constant that does not fit into integer type. */ |
374035cb | 2857 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
0e3a99ae AS |
2858 | && TREE_CODE (type) == INTEGER_TYPE |
2859 | && !int_fits_type_p (expr, type)) | |
2860 | { | |
2861 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) | |
374035cb | 2862 | && tree_int_cst_sgn (expr) < 0) |
0e3a99ae AS |
2863 | { |
2864 | if (produce_warns) | |
2865 | warning_at (loc, OPT_Wsign_conversion, "negative integer" | |
2866 | " implicitly converted to unsigned type"); | |
2867 | } | |
2868 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) | |
2869 | { | |
2870 | if (produce_warns) | |
2871 | warning_at (loc, OPT_Wsign_conversion, "conversion of unsigned" | |
2872 | " constant value to negative integer"); | |
2873 | } | |
7060db96 | 2874 | else |
49b0aa18 | 2875 | give_warning = UNSAFE_OTHER; |
0e3a99ae | 2876 | } |
422c3a54 | 2877 | else if (TREE_CODE (type) == REAL_TYPE) |
0e3a99ae AS |
2878 | { |
2879 | /* Warn for an integer constant that does not fit into real type. */ | |
2880 | if (TREE_CODE (expr_type) == INTEGER_TYPE) | |
2881 | { | |
2882 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
2883 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
49b0aa18 | 2884 | give_warning = UNSAFE_REAL; |
0e3a99ae AS |
2885 | } |
2886 | /* Warn for a real constant that does not fit into a smaller | |
2887 | real type. */ | |
2888 | else if (TREE_CODE (expr_type) == REAL_TYPE | |
2889 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
2890 | { | |
2891 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
2892 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
49b0aa18 | 2893 | give_warning = UNSAFE_REAL; |
0e3a99ae AS |
2894 | } |
2895 | } | |
2896 | } | |
7a37fa90 MM |
2897 | |
2898 | else if (TREE_CODE (expr) == COMPLEX_CST) | |
2899 | { | |
2900 | tree imag_part = TREE_IMAGPART (expr); | |
2901 | /* Conversion from complex constant with zero imaginary part, | |
2902 | perform check for conversion of real part. */ | |
2903 | if ((TREE_CODE (imag_part) == REAL_CST | |
2904 | && real_zerop (imag_part)) | |
2905 | || (TREE_CODE (imag_part) == INTEGER_CST | |
2906 | && integer_zerop (imag_part))) | |
2907 | /* Note: in this branch we use recursive call to unsafe_conversion_p | |
2908 | with different type of EXPR, but it is still safe, because when EXPR | |
2909 | is a constant, it's type is not used in text of generated warnings | |
2910 | (otherwise they could sound misleading). */ | |
2911 | return unsafe_conversion_p (loc, type, TREE_REALPART (expr), | |
2912 | produce_warns); | |
2913 | /* Conversion from complex constant with non-zero imaginary part. */ | |
2914 | else | |
2915 | { | |
2916 | /* Conversion to complex type. | |
2917 | Perform checks for both real and imaginary parts. */ | |
2918 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
2919 | { | |
2920 | /* Unfortunately, produce_warns must be false in two subsequent | |
2921 | calls of unsafe_conversion_p, because otherwise we could | |
2922 | produce strange "double" warnings, if both real and imaginary | |
2923 | parts have conversion problems related to signedness. | |
2924 | ||
2925 | For example: | |
2926 | int32_t _Complex a = 0x80000000 + 0x80000000i; | |
2927 | ||
2928 | Possible solution: add a separate function for checking | |
2929 | constants and combine result of two calls appropriately. */ | |
2930 | enum conversion_safety re_safety = | |
2931 | unsafe_conversion_p (loc, type, TREE_REALPART (expr), false); | |
2932 | enum conversion_safety im_safety = | |
2933 | unsafe_conversion_p (loc, type, imag_part, false); | |
2934 | ||
2935 | /* Merge the results into appropriate single warning. */ | |
2936 | ||
2937 | /* Note: this case includes SAFE_CONVERSION, i.e. success. */ | |
2938 | if (re_safety == im_safety) | |
2939 | give_warning = re_safety; | |
2940 | else if (!re_safety && im_safety) | |
2941 | give_warning = im_safety; | |
2942 | else if (re_safety && !im_safety) | |
2943 | give_warning = re_safety; | |
2944 | else | |
2945 | give_warning = UNSAFE_OTHER; | |
2946 | } | |
2947 | /* Warn about conversion from complex to real or integer type. */ | |
2948 | else | |
2949 | give_warning = UNSAFE_IMAGINARY; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | /* Checks for remaining case: EXPR is not constant. */ | |
0e3a99ae AS |
2954 | else |
2955 | { | |
422c3a54 | 2956 | /* Warn for real types converted to integer types. */ |
6715192c | 2957 | if (TREE_CODE (expr_type) == REAL_TYPE |
0e3a99ae | 2958 | && TREE_CODE (type) == INTEGER_TYPE) |
49b0aa18 | 2959 | give_warning = UNSAFE_REAL; |
422c3a54 | 2960 | |
6715192c | 2961 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
0e3a99ae AS |
2962 | && TREE_CODE (type) == INTEGER_TYPE) |
2963 | { | |
cfdaefec | 2964 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
c00e8b06 | 2965 | expr = get_unwidened (expr, 0); |
6715192c | 2966 | expr_type = TREE_TYPE (expr); |
cfdaefec | 2967 | |
6715192c | 2968 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
b8698a0f | 2969 | if (TREE_CODE (expr) == BIT_AND_EXPR |
0e3a99ae | 2970 | || TREE_CODE (expr) == BIT_IOR_EXPR |
6715192c MLI |
2971 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
2972 | { | |
374035cb MLI |
2973 | /* If both args were extended from a shortest type, |
2974 | use that type if that is safe. */ | |
b8698a0f L |
2975 | expr_type = shorten_binary_op (expr_type, |
2976 | TREE_OPERAND (expr, 0), | |
2977 | TREE_OPERAND (expr, 1), | |
6715192c MLI |
2978 | /* bitwise */1); |
2979 | ||
6715192c MLI |
2980 | if (TREE_CODE (expr) == BIT_AND_EXPR) |
2981 | { | |
2982 | tree op0 = TREE_OPERAND (expr, 0); | |
2983 | tree op1 = TREE_OPERAND (expr, 1); | |
9c591bd0 MLI |
2984 | bool unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
2985 | bool unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
2986 | ||
2987 | /* If one of the operands is a non-negative constant | |
2988 | that fits in the target type, then the type of the | |
2989 | other operand does not matter. */ | |
6715192c MLI |
2990 | if ((TREE_CODE (op0) == INTEGER_CST |
2991 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
2992 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
2993 | || (TREE_CODE (op1) == INTEGER_CST | |
374035cb | 2994 | && int_fits_type_p (op1, c_common_signed_type (type)) |
b8698a0f | 2995 | && int_fits_type_p (op1, |
374035cb | 2996 | c_common_unsigned_type (type)))) |
49b0aa18 | 2997 | return SAFE_CONVERSION; |
9c591bd0 MLI |
2998 | /* If constant is unsigned and fits in the target |
2999 | type, then the result will also fit. */ | |
3000 | else if ((TREE_CODE (op0) == INTEGER_CST | |
b8698a0f | 3001 | && unsigned0 |
9c591bd0 MLI |
3002 | && int_fits_type_p (op0, type)) |
3003 | || (TREE_CODE (op1) == INTEGER_CST | |
3004 | && unsigned1 | |
3005 | && int_fits_type_p (op1, type))) | |
49b0aa18 | 3006 | return SAFE_CONVERSION; |
6715192c MLI |
3007 | } |
3008 | } | |
0e3a99ae | 3009 | /* Warn for integer types converted to smaller integer types. */ |
b8698a0f | 3010 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
49b0aa18 | 3011 | give_warning = UNSAFE_OTHER; |
7060db96 MLI |
3012 | |
3013 | /* When they are the same width but different signedness, | |
3014 | then the value may change. */ | |
0e3a99ae | 3015 | else if (((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
6715192c | 3016 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7060db96 MLI |
3017 | /* Even when converted to a bigger type, if the type is |
3018 | unsigned but expr is signed, then negative values | |
3019 | will be changed. */ | |
0e3a99ae AS |
3020 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
3021 | && produce_warns) | |
6312e84d MLI |
3022 | warning_at (loc, OPT_Wsign_conversion, "conversion to %qT from %qT " |
3023 | "may change the sign of the result", | |
3024 | type, expr_type); | |
0e3a99ae | 3025 | } |
422c3a54 MLI |
3026 | |
3027 | /* Warn for integer types converted to real types if and only if | |
0e3a99ae AS |
3028 | all the range of values of the integer type cannot be |
3029 | represented by the real type. */ | |
6715192c | 3030 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
0e3a99ae AS |
3031 | && TREE_CODE (type) == REAL_TYPE) |
3032 | { | |
58076e21 MLI |
3033 | /* Don't warn about char y = 0xff; float x = (int) y; */ |
3034 | expr = get_unwidened (expr, 0); | |
3035 | expr_type = TREE_TYPE (expr); | |
3036 | ||
7a37fa90 | 3037 | if (!int_safely_convertible_to_real_p (expr_type, type)) |
49b0aa18 | 3038 | give_warning = UNSAFE_OTHER; |
0e3a99ae | 3039 | } |
422c3a54 MLI |
3040 | |
3041 | /* Warn for real types converted to smaller real types. */ | |
6715192c | 3042 | else if (TREE_CODE (expr_type) == REAL_TYPE |
0e3a99ae AS |
3043 | && TREE_CODE (type) == REAL_TYPE |
3044 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
49b0aa18 | 3045 | give_warning = UNSAFE_REAL; |
7a37fa90 MM |
3046 | |
3047 | /* Check conversion between two complex types. */ | |
3048 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
3049 | && TREE_CODE (type) == COMPLEX_TYPE) | |
3050 | { | |
3051 | /* Extract underlying types (i.e., type of real and imaginary | |
3052 | parts) of expr_type and type. */ | |
3053 | tree from_type = TREE_TYPE (expr_type); | |
3054 | tree to_type = TREE_TYPE (type); | |
3055 | ||
3056 | /* Warn for real types converted to integer types. */ | |
3057 | if (TREE_CODE (from_type) == REAL_TYPE | |
3058 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
3059 | give_warning = UNSAFE_REAL; | |
3060 | ||
3061 | /* Warn for real types converted to smaller real types. */ | |
3062 | else if (TREE_CODE (from_type) == REAL_TYPE | |
3063 | && TREE_CODE (to_type) == REAL_TYPE | |
3064 | && TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
3065 | give_warning = UNSAFE_REAL; | |
3066 | ||
3067 | /* Check conversion for complex integer types. Here implementation | |
3068 | is simpler than for real-domain integers because it does not | |
3069 | involve sophisticated cases, such as bitmasks, casts, etc. */ | |
3070 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
3071 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
3072 | { | |
3073 | /* Warn for integer types converted to smaller integer types. */ | |
3074 | if (TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
3075 | give_warning = UNSAFE_OTHER; | |
3076 | ||
3077 | /* Check for different signedness, see case for real-domain | |
3078 | integers (above) for a more detailed comment. */ | |
3079 | else if (((TYPE_PRECISION (to_type) == TYPE_PRECISION (from_type) | |
3080 | && TYPE_UNSIGNED (to_type) != TYPE_UNSIGNED (from_type)) | |
3081 | || (TYPE_UNSIGNED (to_type) && !TYPE_UNSIGNED (from_type))) | |
3082 | && produce_warns) | |
3083 | warning_at (loc, OPT_Wsign_conversion, | |
3084 | "conversion to %qT from %qT " | |
3085 | "may change the sign of the result", | |
3086 | type, expr_type); | |
3087 | } | |
3088 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
3089 | && TREE_CODE (to_type) == REAL_TYPE | |
3090 | && !int_safely_convertible_to_real_p (from_type, to_type)) | |
3091 | give_warning = UNSAFE_OTHER; | |
3092 | } | |
3093 | ||
3094 | /* Warn for complex types converted to real or integer types. */ | |
3095 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
3096 | && TREE_CODE (type) != COMPLEX_TYPE) | |
3097 | give_warning = UNSAFE_IMAGINARY; | |
0e3a99ae AS |
3098 | } |
3099 | ||
3100 | return give_warning; | |
3101 | } | |
3102 | ||
3103 | /* Warns if the conversion of EXPR to TYPE may alter a value. | |
3104 | This is a helper function for warnings_for_convert_and_check. */ | |
3105 | ||
3106 | static void | |
68fca595 | 3107 | conversion_warning (location_t loc, tree type, tree expr) |
0e3a99ae | 3108 | { |
0e3a99ae | 3109 | tree expr_type = TREE_TYPE (expr); |
49b0aa18 | 3110 | enum conversion_safety conversion_kind; |
422c3a54 | 3111 | |
49b0aa18 | 3112 | if (!warn_conversion && !warn_sign_conversion && !warn_float_conversion) |
0e3a99ae | 3113 | return; |
422c3a54 | 3114 | |
66f20604 MP |
3115 | /* This may happen, because for LHS op= RHS we preevaluate |
3116 | RHS and create C_MAYBE_CONST_EXPR <SAVE_EXPR <RHS>>, which | |
3117 | means we could no longer see the code of the EXPR. */ | |
3118 | if (TREE_CODE (expr) == C_MAYBE_CONST_EXPR) | |
3119 | expr = C_MAYBE_CONST_EXPR_EXPR (expr); | |
3120 | if (TREE_CODE (expr) == SAVE_EXPR) | |
3121 | expr = TREE_OPERAND (expr, 0); | |
3122 | ||
0e3a99ae AS |
3123 | switch (TREE_CODE (expr)) |
3124 | { | |
3125 | case EQ_EXPR: | |
3126 | case NE_EXPR: | |
3127 | case LE_EXPR: | |
3128 | case GE_EXPR: | |
3129 | case LT_EXPR: | |
3130 | case GT_EXPR: | |
3131 | case TRUTH_ANDIF_EXPR: | |
3132 | case TRUTH_ORIF_EXPR: | |
3133 | case TRUTH_AND_EXPR: | |
3134 | case TRUTH_OR_EXPR: | |
3135 | case TRUTH_XOR_EXPR: | |
3136 | case TRUTH_NOT_EXPR: | |
3137 | /* Conversion from boolean to a signed:1 bit-field (which only | |
3138 | can hold the values 0 and -1) doesn't lose information - but | |
3139 | it does change the value. */ | |
3140 | if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type)) | |
3141 | warning_at (loc, OPT_Wconversion, | |
3142 | "conversion to %qT from boolean expression", type); | |
3143 | return; | |
3144 | ||
3145 | case REAL_CST: | |
3146 | case INTEGER_CST: | |
7a37fa90 | 3147 | case COMPLEX_CST: |
68fca595 | 3148 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
49b0aa18 JC |
3149 | if (conversion_kind == UNSAFE_REAL) |
3150 | warning_at (loc, OPT_Wfloat_conversion, | |
3151 | "conversion to %qT alters %qT constant value", | |
3152 | type, expr_type); | |
3153 | else if (conversion_kind) | |
0e3a99ae AS |
3154 | warning_at (loc, OPT_Wconversion, |
3155 | "conversion to %qT alters %qT constant value", | |
3156 | type, expr_type); | |
3157 | return; | |
3158 | ||
3159 | case COND_EXPR: | |
3160 | { | |
3f46d6a5 MLI |
3161 | /* In case of COND_EXPR, we do not care about the type of |
3162 | COND_EXPR, only about the conversion of each operand. */ | |
3163 | tree op1 = TREE_OPERAND (expr, 1); | |
3164 | tree op2 = TREE_OPERAND (expr, 2); | |
3165 | ||
68fca595 MP |
3166 | conversion_warning (loc, type, op1); |
3167 | conversion_warning (loc, type, op2); | |
3f46d6a5 | 3168 | return; |
0e3a99ae AS |
3169 | } |
3170 | ||
3171 | default: /* 'expr' is not a constant. */ | |
68fca595 | 3172 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
49b0aa18 JC |
3173 | if (conversion_kind == UNSAFE_REAL) |
3174 | warning_at (loc, OPT_Wfloat_conversion, | |
3175 | "conversion to %qT from %qT may alter its value", | |
3176 | type, expr_type); | |
7a37fa90 MM |
3177 | else if (conversion_kind == UNSAFE_IMAGINARY) |
3178 | warning_at (loc, OPT_Wconversion, | |
3179 | "conversion to %qT from %qT discards imaginary component", | |
3180 | type, expr_type); | |
49b0aa18 | 3181 | else if (conversion_kind) |
0e3a99ae | 3182 | warning_at (loc, OPT_Wconversion, |
6312e84d MLI |
3183 | "conversion to %qT from %qT may alter its value", |
3184 | type, expr_type); | |
422c3a54 MLI |
3185 | } |
3186 | } | |
3187 | ||
07231d4f MLI |
3188 | /* Produce warnings after a conversion. RESULT is the result of |
3189 | converting EXPR to TYPE. This is a helper function for | |
3190 | convert_and_check and cp_convert_and_check. */ | |
d74154d5 | 3191 | |
07231d4f | 3192 | void |
68fca595 MP |
3193 | warnings_for_convert_and_check (location_t loc, tree type, tree expr, |
3194 | tree result) | |
d74154d5 | 3195 | { |
68fca595 | 3196 | loc = expansion_point_location_if_in_system_header (loc); |
5a3c9cf2 | 3197 | |
91c41804 RS |
3198 | if (TREE_CODE (expr) == INTEGER_CST |
3199 | && (TREE_CODE (type) == INTEGER_TYPE | |
3200 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
3201 | && !int_fits_type_p (expr, type)) | |
3202 | { | |
422c3a54 MLI |
3203 | /* Do not diagnose overflow in a constant expression merely |
3204 | because a conversion overflowed. */ | |
91c41804 | 3205 | if (TREE_OVERFLOW (result)) |
d95787e6 RS |
3206 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
3207 | ||
91c41804 | 3208 | if (TYPE_UNSIGNED (type)) |
422c3a54 | 3209 | { |
91c41804 RS |
3210 | /* This detects cases like converting -129 or 256 to |
3211 | unsigned char. */ | |
3212 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
5a3c9cf2 PC |
3213 | warning_at (loc, OPT_Woverflow, |
3214 | "large integer implicitly truncated to unsigned type"); | |
7060db96 | 3215 | else |
68fca595 | 3216 | conversion_warning (loc, type, expr); |
91c41804 | 3217 | } |
b8698a0f | 3218 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
68fca595 | 3219 | warning_at (loc, OPT_Woverflow, |
f73fe417 MLI |
3220 | "overflow in implicit constant conversion"); |
3221 | /* No warning for converting 0x80000000 to int. */ | |
3222 | else if (pedantic | |
3223 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
3224 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
3225 | != TYPE_PRECISION (type))) | |
5a3c9cf2 PC |
3226 | warning_at (loc, OPT_Woverflow, |
3227 | "overflow in implicit constant conversion"); | |
f73fe417 | 3228 | |
7060db96 | 3229 | else |
68fca595 | 3230 | conversion_warning (loc, type, expr); |
d74154d5 | 3231 | } |
ab22c1fa CF |
3232 | else if ((TREE_CODE (result) == INTEGER_CST |
3233 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
5a3c9cf2 PC |
3234 | warning_at (loc, OPT_Woverflow, |
3235 | "overflow in implicit constant conversion"); | |
7060db96 | 3236 | else |
68fca595 | 3237 | conversion_warning (loc, type, expr); |
07231d4f MLI |
3238 | } |
3239 | ||
3240 | ||
3241 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
3242 | Invoke this function on every expression that is converted implicitly, | |
3243 | i.e. because of language rules and not because of an explicit cast. */ | |
3244 | ||
3245 | tree | |
68fca595 | 3246 | convert_and_check (location_t loc, tree type, tree expr) |
07231d4f MLI |
3247 | { |
3248 | tree result; | |
8ce94e44 JM |
3249 | tree expr_for_warning; |
3250 | ||
3251 | /* Convert from a value with possible excess precision rather than | |
3252 | via the semantic type, but do not warn about values not fitting | |
3253 | exactly in the semantic type. */ | |
3254 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
3255 | { | |
3256 | tree orig_type = TREE_TYPE (expr); | |
3257 | expr = TREE_OPERAND (expr, 0); | |
3258 | expr_for_warning = convert (orig_type, expr); | |
3259 | if (orig_type == type) | |
3260 | return expr_for_warning; | |
3261 | } | |
3262 | else | |
3263 | expr_for_warning = expr; | |
07231d4f MLI |
3264 | |
3265 | if (TREE_TYPE (expr) == type) | |
3266 | return expr; | |
b8698a0f | 3267 | |
07231d4f MLI |
3268 | result = convert (type, expr); |
3269 | ||
7d882b83 ILT |
3270 | if (c_inhibit_evaluation_warnings == 0 |
3271 | && !TREE_OVERFLOW_P (expr) | |
3272 | && result != error_mark_node) | |
68fca595 | 3273 | warnings_for_convert_and_check (loc, type, expr_for_warning, result); |
07231d4f | 3274 | |
91c41804 | 3275 | return result; |
96571883 BK |
3276 | } |
3277 | \f | |
235cfbc4 BS |
3278 | /* A node in a list that describes references to variables (EXPR), which are |
3279 | either read accesses if WRITER is zero, or write accesses, in which case | |
3280 | WRITER is the parent of EXPR. */ | |
3281 | struct tlist | |
3282 | { | |
3283 | struct tlist *next; | |
3284 | tree expr, writer; | |
3285 | }; | |
3286 | ||
3287 | /* Used to implement a cache the results of a call to verify_tree. We only | |
3288 | use this for SAVE_EXPRs. */ | |
3289 | struct tlist_cache | |
3290 | { | |
3291 | struct tlist_cache *next; | |
3292 | struct tlist *cache_before_sp; | |
3293 | struct tlist *cache_after_sp; | |
3294 | tree expr; | |
2683ed8d BS |
3295 | }; |
3296 | ||
235cfbc4 BS |
3297 | /* Obstack to use when allocating tlist structures, and corresponding |
3298 | firstobj. */ | |
3299 | static struct obstack tlist_obstack; | |
3300 | static char *tlist_firstobj = 0; | |
3301 | ||
3302 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
3303 | warnings. */ | |
3304 | static struct tlist *warned_ids; | |
3305 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
3306 | cache the results. */ | |
3307 | static struct tlist_cache *save_expr_cache; | |
3308 | ||
35b1a6fa AJ |
3309 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
3310 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
3311 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
3312 | static int warning_candidate_p (tree); | |
1e4ae551 | 3313 | static bool candidate_equal_p (const_tree, const_tree); |
35b1a6fa AJ |
3314 | static void warn_for_collisions (struct tlist *); |
3315 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
3316 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
2683ed8d | 3317 | |
235cfbc4 BS |
3318 | /* Create a new struct tlist and fill in its fields. */ |
3319 | static struct tlist * | |
35b1a6fa | 3320 | new_tlist (struct tlist *next, tree t, tree writer) |
235cfbc4 BS |
3321 | { |
3322 | struct tlist *l; | |
5d038c4c | 3323 | l = XOBNEW (&tlist_obstack, struct tlist); |
235cfbc4 BS |
3324 | l->next = next; |
3325 | l->expr = t; | |
3326 | l->writer = writer; | |
3327 | return l; | |
3328 | } | |
3329 | ||
3330 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
3331 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
3332 | ||
3333 | static void | |
35b1a6fa | 3334 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
235cfbc4 BS |
3335 | { |
3336 | while (add) | |
3337 | { | |
3338 | struct tlist *next = add->next; | |
3f75a254 | 3339 | if (!copy) |
235cfbc4 | 3340 | add->next = *to; |
1e4ae551 | 3341 | if (!exclude_writer || !candidate_equal_p (add->writer, exclude_writer)) |
235cfbc4 BS |
3342 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
3343 | add = next; | |
3344 | } | |
3345 | } | |
3346 | ||
3347 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
3348 | each variable that already exists in TO, no new node is added; however if | |
3349 | there is a write access recorded in ADD, and an occurrence on TO is only | |
3350 | a read access, then the occurrence in TO will be modified to record the | |
3351 | write. */ | |
2683ed8d BS |
3352 | |
3353 | static void | |
35b1a6fa | 3354 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
235cfbc4 BS |
3355 | { |
3356 | struct tlist **end = to; | |
3357 | ||
3358 | while (*end) | |
3359 | end = &(*end)->next; | |
3360 | ||
3361 | while (add) | |
3362 | { | |
3363 | int found = 0; | |
3364 | struct tlist *tmp2; | |
3365 | struct tlist *next = add->next; | |
3366 | ||
3367 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
1e4ae551 | 3368 | if (candidate_equal_p (tmp2->expr, add->expr)) |
235cfbc4 BS |
3369 | { |
3370 | found = 1; | |
3f75a254 | 3371 | if (!tmp2->writer) |
235cfbc4 BS |
3372 | tmp2->writer = add->writer; |
3373 | } | |
3f75a254 | 3374 | if (!found) |
235cfbc4 | 3375 | { |
c2bf53a1 | 3376 | *end = copy ? new_tlist (NULL, add->expr, add->writer) : add; |
235cfbc4 BS |
3377 | end = &(*end)->next; |
3378 | *end = 0; | |
3379 | } | |
3380 | add = next; | |
3381 | } | |
3382 | } | |
3383 | ||
3384 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
3385 | references in list LIST conflict with it, excluding reads if ONLY writers | |
3386 | is nonzero. */ | |
3387 | ||
3388 | static void | |
35b1a6fa AJ |
3389 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
3390 | int only_writes) | |
235cfbc4 BS |
3391 | { |
3392 | struct tlist *tmp; | |
3393 | ||
3394 | /* Avoid duplicate warnings. */ | |
3395 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
1e4ae551 | 3396 | if (candidate_equal_p (tmp->expr, written)) |
235cfbc4 BS |
3397 | return; |
3398 | ||
3399 | while (list) | |
3400 | { | |
1e4ae551 MLI |
3401 | if (candidate_equal_p (list->expr, written) |
3402 | && !candidate_equal_p (list->writer, writer) | |
3403 | && (!only_writes || list->writer)) | |
235cfbc4 BS |
3404 | { |
3405 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
8400e75e | 3406 | warning_at (EXPR_LOC_OR_LOC (writer, input_location), |
ca085fd7 MLI |
3407 | OPT_Wsequence_point, "operation on %qE may be undefined", |
3408 | list->expr); | |
235cfbc4 BS |
3409 | } |
3410 | list = list->next; | |
3411 | } | |
3412 | } | |
3413 | ||
3414 | /* Given a list LIST of references to variables, find whether any of these | |
3415 | can cause conflicts due to missing sequence points. */ | |
3416 | ||
3417 | static void | |
35b1a6fa | 3418 | warn_for_collisions (struct tlist *list) |
235cfbc4 BS |
3419 | { |
3420 | struct tlist *tmp; | |
35b1a6fa | 3421 | |
235cfbc4 BS |
3422 | for (tmp = list; tmp; tmp = tmp->next) |
3423 | { | |
3424 | if (tmp->writer) | |
3425 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
3426 | } | |
3427 | } | |
3428 | ||
684d9f3b | 3429 | /* Return nonzero if X is a tree that can be verified by the sequence point |
235cfbc4 BS |
3430 | warnings. */ |
3431 | static int | |
35b1a6fa | 3432 | warning_candidate_p (tree x) |
2683ed8d | 3433 | { |
07078664 JJ |
3434 | if (DECL_P (x) && DECL_ARTIFICIAL (x)) |
3435 | return 0; | |
3436 | ||
92e948a8 NF |
3437 | if (TREE_CODE (x) == BLOCK) |
3438 | return 0; | |
3439 | ||
07078664 | 3440 | /* VOID_TYPE_P (TREE_TYPE (x)) is workaround for cp/tree.c |
1e4ae551 | 3441 | (lvalue_p) crash on TRY/CATCH. */ |
07078664 JJ |
3442 | if (TREE_TYPE (x) == NULL_TREE || VOID_TYPE_P (TREE_TYPE (x))) |
3443 | return 0; | |
3444 | ||
3445 | if (!lvalue_p (x)) | |
3446 | return 0; | |
3447 | ||
3448 | /* No point to track non-const calls, they will never satisfy | |
3449 | operand_equal_p. */ | |
3450 | if (TREE_CODE (x) == CALL_EXPR && (call_expr_flags (x) & ECF_CONST) == 0) | |
3451 | return 0; | |
3452 | ||
3453 | if (TREE_CODE (x) == STRING_CST) | |
3454 | return 0; | |
3455 | ||
3456 | return 1; | |
1e4ae551 MLI |
3457 | } |
3458 | ||
3459 | /* Return nonzero if X and Y appear to be the same candidate (or NULL) */ | |
3460 | static bool | |
3461 | candidate_equal_p (const_tree x, const_tree y) | |
3462 | { | |
3463 | return (x == y) || (x && y && operand_equal_p (x, y, 0)); | |
235cfbc4 | 3464 | } |
2683ed8d | 3465 | |
235cfbc4 BS |
3466 | /* Walk the tree X, and record accesses to variables. If X is written by the |
3467 | parent tree, WRITER is the parent. | |
3468 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
3469 | expression or its only operand forces a sequence point, then everything up | |
3470 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
3471 | in PNO_SP. | |
3472 | Once we return, we will have emitted warnings if any subexpression before | |
3473 | such a sequence point could be undefined. On a higher level, however, the | |
3474 | sequence point may not be relevant, and we'll merge the two lists. | |
3475 | ||
3476 | Example: (b++, a) + b; | |
3477 | The call that processes the COMPOUND_EXPR will store the increment of B | |
3478 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
3479 | processes the PLUS_EXPR will need to merge the two lists so that | |
3480 | eventually, all accesses end up on the same list (and we'll warn about the | |
3481 | unordered subexpressions b++ and b. | |
3482 | ||
3483 | A note on merging. If we modify the former example so that our expression | |
3484 | becomes | |
3485 | (b++, b) + a | |
3486 | care must be taken not simply to add all three expressions into the final | |
3487 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
3488 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
3489 | way, so that no more than one access to B is recorded. */ | |
2683ed8d | 3490 | |
235cfbc4 | 3491 | static void |
35b1a6fa AJ |
3492 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
3493 | tree writer) | |
235cfbc4 BS |
3494 | { |
3495 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
3496 | enum tree_code code; | |
6615c446 | 3497 | enum tree_code_class cl; |
2683ed8d | 3498 | |
f9e1917e JM |
3499 | /* X may be NULL if it is the operand of an empty statement expression |
3500 | ({ }). */ | |
3501 | if (x == NULL) | |
3502 | return; | |
3503 | ||
235cfbc4 BS |
3504 | restart: |
3505 | code = TREE_CODE (x); | |
e3a64162 | 3506 | cl = TREE_CODE_CLASS (code); |
2683ed8d | 3507 | |
235cfbc4 | 3508 | if (warning_candidate_p (x)) |
1e4ae551 | 3509 | *pno_sp = new_tlist (*pno_sp, x, writer); |
235cfbc4 BS |
3510 | |
3511 | switch (code) | |
3512 | { | |
52a84e42 | 3513 | case CONSTRUCTOR: |
f7716d57 | 3514 | case SIZEOF_EXPR: |
52a84e42 BS |
3515 | return; |
3516 | ||
235cfbc4 BS |
3517 | case COMPOUND_EXPR: |
3518 | case TRUTH_ANDIF_EXPR: | |
3519 | case TRUTH_ORIF_EXPR: | |
3520 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3521 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3522 | warn_for_collisions (tmp_nosp); | |
3523 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3524 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
3525 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
3526 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3527 | return; | |
3528 | ||
3529 | case COND_EXPR: | |
3530 | tmp_before = tmp_list2 = 0; | |
3531 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
3532 | warn_for_collisions (tmp_list2); | |
3533 | merge_tlist (pbefore_sp, tmp_before, 0); | |
c2bf53a1 | 3534 | merge_tlist (pbefore_sp, tmp_list2, 0); |
235cfbc4 BS |
3535 | |
3536 | tmp_list3 = tmp_nosp = 0; | |
3537 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
3538 | warn_for_collisions (tmp_nosp); | |
3539 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3540 | ||
3541 | tmp_list3 = tmp_list2 = 0; | |
3542 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
3543 | warn_for_collisions (tmp_list2); | |
3544 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3545 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
3546 | two first, to avoid warning for (a ? b++ : b++). */ | |
3547 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
3548 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3549 | return; | |
3550 | ||
2683ed8d BS |
3551 | case PREDECREMENT_EXPR: |
3552 | case PREINCREMENT_EXPR: | |
3553 | case POSTDECREMENT_EXPR: | |
3554 | case POSTINCREMENT_EXPR: | |
235cfbc4 BS |
3555 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
3556 | return; | |
3557 | ||
3558 | case MODIFY_EXPR: | |
3559 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3560 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
3561 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
3562 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
3563 | in the RHS. Example: | |
3564 | *a = (a++, 2) | |
3565 | Despite the fact that the modification of "a" is in the before_sp | |
3566 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
3567 | We can handle this by adding the contents of tmp_list3 | |
3568 | to those of tmp_before, and redoing the collision warnings for that | |
3569 | list. */ | |
3570 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
3571 | warn_for_collisions (tmp_before); | |
3572 | /* Exclude the LHS itself here; we first have to merge it into the | |
3573 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
3574 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
3575 | as a write. */ | |
3576 | add_tlist (pno_sp, tmp_list3, x, 0); | |
3577 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
3578 | ||
3579 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3580 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
3581 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
3582 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
3583 | return; | |
2683ed8d BS |
3584 | |
3585 | case CALL_EXPR: | |
235cfbc4 BS |
3586 | /* We need to warn about conflicts among arguments and conflicts between |
3587 | args and the function address. Side effects of the function address, | |
3588 | however, are not ordered by the sequence point of the call. */ | |
5039610b SL |
3589 | { |
3590 | call_expr_arg_iterator iter; | |
3591 | tree arg; | |
b8698a0f | 3592 | tmp_before = tmp_nosp = 0; |
5039610b SL |
3593 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); |
3594 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
3595 | { | |
3596 | tmp_list2 = tmp_list3 = 0; | |
3597 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
3598 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
3599 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
3600 | } | |
3601 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
3602 | warn_for_collisions (tmp_before); | |
3603 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
3604 | return; | |
3605 | } | |
2683ed8d BS |
3606 | |
3607 | case TREE_LIST: | |
3608 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
3609 | while (x) | |
3610 | { | |
235cfbc4 BS |
3611 | tmp_before = tmp_nosp = 0; |
3612 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
3613 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3614 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2683ed8d BS |
3615 | x = TREE_CHAIN (x); |
3616 | } | |
235cfbc4 | 3617 | return; |
2683ed8d | 3618 | |
235cfbc4 BS |
3619 | case SAVE_EXPR: |
3620 | { | |
3621 | struct tlist_cache *t; | |
3622 | for (t = save_expr_cache; t; t = t->next) | |
1e4ae551 | 3623 | if (candidate_equal_p (t->expr, x)) |
235cfbc4 | 3624 | break; |
2683ed8d | 3625 | |
3f75a254 | 3626 | if (!t) |
2683ed8d | 3627 | { |
5d038c4c | 3628 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
235cfbc4 BS |
3629 | t->next = save_expr_cache; |
3630 | t->expr = x; | |
3631 | save_expr_cache = t; | |
3632 | ||
3633 | tmp_before = tmp_nosp = 0; | |
3634 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3635 | warn_for_collisions (tmp_nosp); | |
3636 | ||
3637 | tmp_list3 = 0; | |
c2bf53a1 | 3638 | merge_tlist (&tmp_list3, tmp_nosp, 0); |
235cfbc4 BS |
3639 | t->cache_before_sp = tmp_before; |
3640 | t->cache_after_sp = tmp_list3; | |
2683ed8d | 3641 | } |
235cfbc4 BS |
3642 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
3643 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
3644 | return; | |
3645 | } | |
2683ed8d | 3646 | |
528c22f4 MLI |
3647 | case ADDR_EXPR: |
3648 | x = TREE_OPERAND (x, 0); | |
3649 | if (DECL_P (x)) | |
3650 | return; | |
3651 | writer = 0; | |
3652 | goto restart; | |
3653 | ||
6615c446 JO |
3654 | default: |
3655 | /* For other expressions, simply recurse on their operands. | |
c22cacf3 | 3656 | Manual tail recursion for unary expressions. |
6615c446 JO |
3657 | Other non-expressions need not be processed. */ |
3658 | if (cl == tcc_unary) | |
3659 | { | |
6615c446 JO |
3660 | x = TREE_OPERAND (x, 0); |
3661 | writer = 0; | |
3662 | goto restart; | |
3663 | } | |
3664 | else if (IS_EXPR_CODE_CLASS (cl)) | |
3665 | { | |
3666 | int lp; | |
5039610b | 3667 | int max = TREE_OPERAND_LENGTH (x); |
6615c446 JO |
3668 | for (lp = 0; lp < max; lp++) |
3669 | { | |
3670 | tmp_before = tmp_nosp = 0; | |
3671 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
3672 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3673 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3674 | } | |
3675 | } | |
3676 | return; | |
2683ed8d | 3677 | } |
2683ed8d BS |
3678 | } |
3679 | ||
8d9afc4e | 3680 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
2683ed8d BS |
3681 | points. */ |
3682 | ||
24e47c76 | 3683 | DEBUG_FUNCTION void |
35b1a6fa | 3684 | verify_sequence_points (tree expr) |
2683ed8d | 3685 | { |
235cfbc4 | 3686 | struct tlist *before_sp = 0, *after_sp = 0; |
2683ed8d | 3687 | |
235cfbc4 BS |
3688 | warned_ids = 0; |
3689 | save_expr_cache = 0; | |
3690 | if (tlist_firstobj == 0) | |
2683ed8d | 3691 | { |
235cfbc4 | 3692 | gcc_obstack_init (&tlist_obstack); |
28dab132 | 3693 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
2683ed8d BS |
3694 | } |
3695 | ||
235cfbc4 BS |
3696 | verify_tree (expr, &before_sp, &after_sp, 0); |
3697 | warn_for_collisions (after_sp); | |
3698 | obstack_free (&tlist_obstack, tlist_firstobj); | |
2683ed8d | 3699 | } |
b30f223b RS |
3700 | \f |
3701 | /* Validate the expression after `case' and apply default promotions. */ | |
3702 | ||
a6c0a76c | 3703 | static tree |
62e4eb35 | 3704 | check_case_value (location_t loc, tree value) |
b30f223b RS |
3705 | { |
3706 | if (value == NULL_TREE) | |
3707 | return value; | |
3708 | ||
522ddfa2 JM |
3709 | if (TREE_CODE (value) == INTEGER_CST) |
3710 | /* Promote char or short to int. */ | |
3711 | value = perform_integral_promotions (value); | |
3712 | else if (value != error_mark_node) | |
b30f223b | 3713 | { |
62e4eb35 | 3714 | error_at (loc, "case label does not reduce to an integer constant"); |
b30f223b RS |
3715 | value = error_mark_node; |
3716 | } | |
b30f223b | 3717 | |
bc690db1 RS |
3718 | constant_expression_warning (value); |
3719 | ||
b30f223b RS |
3720 | return value; |
3721 | } | |
3722 | \f | |
a6c0a76c | 3723 | /* See if the case values LOW and HIGH are in the range of the original |
89dbed81 | 3724 | type (i.e. before the default conversion to int) of the switch testing |
a6c0a76c SB |
3725 | expression. |
3726 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
2a7e31df | 3727 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
a6c0a76c SB |
3728 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
3729 | if the case is not a case range. | |
3730 | The caller has to make sure that we are not called with NULL for | |
b155cfd9 MP |
3731 | CASE_LOW_P (i.e. the default case). OUTSIDE_RANGE_P says whether there |
3732 | was a case value that doesn't fit into the range of the ORIG_TYPE. | |
0fa2e4df | 3733 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
a6c0a76c SB |
3734 | untouched) or false if the label is out of range. */ |
3735 | ||
3736 | static bool | |
9d548dfb | 3737 | check_case_bounds (location_t loc, tree type, tree orig_type, |
b155cfd9 MP |
3738 | tree *case_low_p, tree *case_high_p, |
3739 | bool *outside_range_p) | |
a6c0a76c SB |
3740 | { |
3741 | tree min_value, max_value; | |
3742 | tree case_low = *case_low_p; | |
3743 | tree case_high = case_high_p ? *case_high_p : case_low; | |
3744 | ||
3745 | /* If there was a problem with the original type, do nothing. */ | |
3746 | if (orig_type == error_mark_node) | |
3747 | return true; | |
3748 | ||
3749 | min_value = TYPE_MIN_VALUE (orig_type); | |
3750 | max_value = TYPE_MAX_VALUE (orig_type); | |
3751 | ||
3752 | /* Case label is less than minimum for type. */ | |
3753 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
3754 | && tree_int_cst_compare (case_high, min_value) < 0) | |
3755 | { | |
9d548dfb MP |
3756 | warning_at (loc, 0, "case label value is less than minimum value " |
3757 | "for type"); | |
b155cfd9 | 3758 | *outside_range_p = true; |
a6c0a76c SB |
3759 | return false; |
3760 | } | |
9f63daea | 3761 | |
a6c0a76c SB |
3762 | /* Case value is greater than maximum for type. */ |
3763 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
3764 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3765 | { | |
9d548dfb | 3766 | warning_at (loc, 0, "case label value exceeds maximum value for type"); |
b155cfd9 | 3767 | *outside_range_p = true; |
a6c0a76c SB |
3768 | return false; |
3769 | } | |
3770 | ||
3771 | /* Saturate lower case label value to minimum. */ | |
3772 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
3773 | && tree_int_cst_compare (case_low, min_value) < 0) | |
3774 | { | |
9d548dfb MP |
3775 | warning_at (loc, 0, "lower value in case label range" |
3776 | " less than minimum value for type"); | |
b155cfd9 | 3777 | *outside_range_p = true; |
a6c0a76c SB |
3778 | case_low = min_value; |
3779 | } | |
9f63daea | 3780 | |
a6c0a76c SB |
3781 | /* Saturate upper case label value to maximum. */ |
3782 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
3783 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3784 | { | |
9d548dfb MP |
3785 | warning_at (loc, 0, "upper value in case label range" |
3786 | " exceeds maximum value for type"); | |
b155cfd9 | 3787 | *outside_range_p = true; |
a6c0a76c SB |
3788 | case_high = max_value; |
3789 | } | |
3790 | ||
3791 | if (*case_low_p != case_low) | |
3792 | *case_low_p = convert (type, case_low); | |
3793 | if (case_high_p && *case_high_p != case_high) | |
3794 | *case_high_p = convert (type, case_high); | |
3795 | ||
3796 | return true; | |
3797 | } | |
3798 | \f | |
b30f223b RS |
3799 | /* Return an integer type with BITS bits of precision, |
3800 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
3801 | ||
3802 | tree | |
35b1a6fa | 3803 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b30f223b | 3804 | { |
78a7c317 DD |
3805 | int i; |
3806 | ||
a311b52c JM |
3807 | if (bits == TYPE_PRECISION (integer_type_node)) |
3808 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3809 | ||
3fc7e390 | 3810 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b30f223b RS |
3811 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
3812 | ||
3fc7e390 | 3813 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b30f223b RS |
3814 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
3815 | ||
3fc7e390 | 3816 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b30f223b RS |
3817 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
3818 | ||
3fc7e390 | 3819 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b30f223b RS |
3820 | return (unsignedp ? long_long_unsigned_type_node |
3821 | : long_long_integer_type_node); | |
3822 | ||
78a7c317 DD |
3823 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
3824 | if (int_n_enabled_p[i] | |
3825 | && bits == int_n_data[i].bitsize) | |
3826 | return (unsignedp ? int_n_trees[i].unsigned_type | |
3827 | : int_n_trees[i].signed_type); | |
a6766312 | 3828 | |
835f9b4d GRK |
3829 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
3830 | return (unsignedp ? widest_unsigned_literal_type_node | |
3831 | : widest_integer_literal_type_node); | |
3832 | ||
3fc7e390 RS |
3833 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
3834 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
3835 | ||
3836 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
3837 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
3838 | ||
3839 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
3840 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
3841 | ||
3842 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
3843 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
3844 | ||
b30f223b RS |
3845 | return 0; |
3846 | } | |
3847 | ||
ab22c1fa CF |
3848 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
3849 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
3850 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
3851 | ||
3852 | tree | |
3853 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
3854 | int unsignedp, int satp) | |
3855 | { | |
ef4bddc2 | 3856 | machine_mode mode; |
ab22c1fa CF |
3857 | if (ibit == 0) |
3858 | mode = unsignedp ? UQQmode : QQmode; | |
3859 | else | |
3860 | mode = unsignedp ? UHAmode : HAmode; | |
3861 | ||
3862 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
3863 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
3864 | break; | |
3865 | ||
3866 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
3867 | { | |
3868 | sorry ("GCC cannot support operators with integer types and " | |
3869 | "fixed-point types that have too many integral and " | |
3870 | "fractional bits together"); | |
3871 | return 0; | |
3872 | } | |
3873 | ||
3874 | return c_common_type_for_mode (mode, satp); | |
3875 | } | |
3876 | ||
d1d3865f ZW |
3877 | /* Used for communication between c_common_type_for_mode and |
3878 | c_register_builtin_type. */ | |
793c625f | 3879 | tree registered_builtin_types; |
d1d3865f | 3880 | |
b30f223b RS |
3881 | /* Return a data type that has machine mode MODE. |
3882 | If the mode is an integer, | |
ab22c1fa CF |
3883 | then UNSIGNEDP selects between signed and unsigned types. |
3884 | If the mode is a fixed-point mode, | |
3885 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b30f223b RS |
3886 | |
3887 | tree | |
ef4bddc2 | 3888 | c_common_type_for_mode (machine_mode mode, int unsignedp) |
b30f223b | 3889 | { |
d1d3865f | 3890 | tree t; |
78a7c317 | 3891 | int i; |
d1d3865f | 3892 | |
a311b52c JM |
3893 | if (mode == TYPE_MODE (integer_type_node)) |
3894 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3895 | ||
b30f223b RS |
3896 | if (mode == TYPE_MODE (signed_char_type_node)) |
3897 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3898 | ||
3899 | if (mode == TYPE_MODE (short_integer_type_node)) | |
3900 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3901 | ||
b30f223b RS |
3902 | if (mode == TYPE_MODE (long_integer_type_node)) |
3903 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3904 | ||
3905 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
3906 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
3907 | ||
78a7c317 DD |
3908 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
3909 | if (int_n_enabled_p[i] | |
3910 | && mode == int_n_data[i].m) | |
3911 | return (unsignedp ? int_n_trees[i].unsigned_type | |
3912 | : int_n_trees[i].signed_type); | |
a6766312 | 3913 | |
835f9b4d | 3914 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
d125d268 | 3915 | return unsignedp ? widest_unsigned_literal_type_node |
6de9cd9a | 3916 | : widest_integer_literal_type_node; |
835f9b4d | 3917 | |
0afeef64 | 3918 | if (mode == QImode) |
3fc7e390 RS |
3919 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
3920 | ||
0afeef64 | 3921 | if (mode == HImode) |
3fc7e390 RS |
3922 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
3923 | ||
0afeef64 | 3924 | if (mode == SImode) |
3fc7e390 RS |
3925 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
3926 | ||
0afeef64 | 3927 | if (mode == DImode) |
3fc7e390 RS |
3928 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
3929 | ||
21a9616b | 3930 | #if HOST_BITS_PER_WIDE_INT >= 64 |
a6d7e156 JL |
3931 | if (mode == TYPE_MODE (intTI_type_node)) |
3932 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
21a9616b | 3933 | #endif |
a6d7e156 | 3934 | |
b30f223b RS |
3935 | if (mode == TYPE_MODE (float_type_node)) |
3936 | return float_type_node; | |
3937 | ||
3938 | if (mode == TYPE_MODE (double_type_node)) | |
3939 | return double_type_node; | |
3940 | ||
3941 | if (mode == TYPE_MODE (long_double_type_node)) | |
3942 | return long_double_type_node; | |
3943 | ||
ff42324e NS |
3944 | if (mode == TYPE_MODE (void_type_node)) |
3945 | return void_type_node; | |
9f63daea | 3946 | |
b30f223b | 3947 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
19b3ffbc DD |
3948 | return (unsignedp |
3949 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3950 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b RS |
3951 | |
3952 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
19b3ffbc DD |
3953 | return (unsignedp |
3954 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3955 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b | 3956 | |
7e7e470f RH |
3957 | if (COMPLEX_MODE_P (mode)) |
3958 | { | |
ef4bddc2 | 3959 | machine_mode inner_mode; |
7e7e470f RH |
3960 | tree inner_type; |
3961 | ||
3962 | if (mode == TYPE_MODE (complex_float_type_node)) | |
3963 | return complex_float_type_node; | |
3964 | if (mode == TYPE_MODE (complex_double_type_node)) | |
3965 | return complex_double_type_node; | |
3966 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
3967 | return complex_long_double_type_node; | |
3968 | ||
3969 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
3970 | return complex_integer_type_node; | |
3971 | ||
3972 | inner_mode = GET_MODE_INNER (mode); | |
3973 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
3974 | if (inner_type != NULL_TREE) | |
3975 | return build_complex_type (inner_type); | |
3976 | } | |
3977 | else if (VECTOR_MODE_P (mode)) | |
4a5eab38 | 3978 | { |
ef4bddc2 | 3979 | machine_mode inner_mode = GET_MODE_INNER (mode); |
4a5eab38 PB |
3980 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); |
3981 | if (inner_type != NULL_TREE) | |
3982 | return build_vector_type_for_mode (inner_type, mode); | |
0afeef64 | 3983 | } |
4061f623 | 3984 | |
9a8ce21f JG |
3985 | if (mode == TYPE_MODE (dfloat32_type_node)) |
3986 | return dfloat32_type_node; | |
3987 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
3988 | return dfloat64_type_node; | |
3989 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
3990 | return dfloat128_type_node; | |
3991 | ||
ab22c1fa CF |
3992 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
3993 | { | |
3994 | if (mode == TYPE_MODE (short_fract_type_node)) | |
3995 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
3996 | if (mode == TYPE_MODE (fract_type_node)) | |
3997 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
3998 | if (mode == TYPE_MODE (long_fract_type_node)) | |
3999 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
4000 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
4001 | return unsignedp ? sat_long_long_fract_type_node | |
4002 | : long_long_fract_type_node; | |
4003 | ||
4004 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
4005 | return unsignedp ? sat_unsigned_short_fract_type_node | |
4006 | : unsigned_short_fract_type_node; | |
4007 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
4008 | return unsignedp ? sat_unsigned_fract_type_node | |
4009 | : unsigned_fract_type_node; | |
4010 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
4011 | return unsignedp ? sat_unsigned_long_fract_type_node | |
4012 | : unsigned_long_fract_type_node; | |
4013 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
4014 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
4015 | : unsigned_long_long_fract_type_node; | |
4016 | ||
4017 | if (mode == TYPE_MODE (short_accum_type_node)) | |
4018 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
4019 | if (mode == TYPE_MODE (accum_type_node)) | |
4020 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
4021 | if (mode == TYPE_MODE (long_accum_type_node)) | |
4022 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
4023 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
4024 | return unsignedp ? sat_long_long_accum_type_node | |
4025 | : long_long_accum_type_node; | |
4026 | ||
4027 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
4028 | return unsignedp ? sat_unsigned_short_accum_type_node | |
4029 | : unsigned_short_accum_type_node; | |
4030 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
4031 | return unsignedp ? sat_unsigned_accum_type_node | |
4032 | : unsigned_accum_type_node; | |
4033 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
4034 | return unsignedp ? sat_unsigned_long_accum_type_node | |
4035 | : unsigned_long_accum_type_node; | |
4036 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
4037 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
4038 | : unsigned_long_long_accum_type_node; | |
4039 | ||
4040 | if (mode == QQmode) | |
4041 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
4042 | if (mode == HQmode) | |
4043 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
4044 | if (mode == SQmode) | |
4045 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
4046 | if (mode == DQmode) | |
4047 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
4048 | if (mode == TQmode) | |
4049 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
4050 | ||
4051 | if (mode == UQQmode) | |
4052 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
4053 | if (mode == UHQmode) | |
4054 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
4055 | if (mode == USQmode) | |
4056 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
4057 | if (mode == UDQmode) | |
4058 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
4059 | if (mode == UTQmode) | |
4060 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
4061 | ||
4062 | if (mode == HAmode) | |
4063 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
4064 | if (mode == SAmode) | |
4065 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
4066 | if (mode == DAmode) | |
4067 | return unsignedp ? sat_da_type_node : da_type_node; | |
4068 | if (mode == TAmode) | |
4069 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
4070 | ||
4071 | if (mode == UHAmode) | |
4072 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
4073 | if (mode == USAmode) | |
4074 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
4075 | if (mode == UDAmode) | |
4076 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
4077 | if (mode == UTAmode) | |
4078 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
4079 | } | |
4080 | ||
d1d3865f | 4081 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
7a421706 MS |
4082 | if (TYPE_MODE (TREE_VALUE (t)) == mode |
4083 | && !!unsignedp == !!TYPE_UNSIGNED (TREE_VALUE (t))) | |
d1d3865f ZW |
4084 | return TREE_VALUE (t); |
4085 | ||
b30f223b RS |
4086 | return 0; |
4087 | } | |
693a6128 | 4088 | |
12753674 RE |
4089 | tree |
4090 | c_common_unsigned_type (tree type) | |
4091 | { | |
4092 | return c_common_signed_or_unsigned_type (1, type); | |
4093 | } | |
4094 | ||
693a6128 GRK |
4095 | /* Return a signed type the same as TYPE in other respects. */ |
4096 | ||
4097 | tree | |
35b1a6fa | 4098 | c_common_signed_type (tree type) |
693a6128 | 4099 | { |
ceef8ce4 | 4100 | return c_common_signed_or_unsigned_type (0, type); |
693a6128 GRK |
4101 | } |
4102 | ||
4103 | /* Return a type the same as TYPE except unsigned or | |
4104 | signed according to UNSIGNEDP. */ | |
4105 | ||
4106 | tree | |
35b1a6fa | 4107 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
693a6128 | 4108 | { |
c74a03d2 | 4109 | tree type1; |
78a7c317 | 4110 | int i; |
693a6128 | 4111 | |
c74a03d2 RAE |
4112 | /* This block of code emulates the behavior of the old |
4113 | c_common_unsigned_type. In particular, it returns | |
4114 | long_unsigned_type_node if passed a long, even when a int would | |
4115 | have the same size. This is necessary for warnings to work | |
4116 | correctly in archs where sizeof(int) == sizeof(long) */ | |
4117 | ||
4118 | type1 = TYPE_MAIN_VARIANT (type); | |
4119 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
4120 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
4121 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
4122 | return unsignedp ? unsigned_type_node : integer_type_node; | |
4123 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
4124 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
4125 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
4126 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
4127 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
4128 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
78a7c317 DD |
4129 | |
4130 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
4131 | if (int_n_enabled_p[i] | |
4132 | && (type1 == int_n_trees[i].unsigned_type | |
4133 | || type1 == int_n_trees[i].signed_type)) | |
4134 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4135 | : int_n_trees[i].signed_type); | |
4136 | ||
c74a03d2 RAE |
4137 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) |
4138 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
4139 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
4140 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
4141 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
4142 | #endif | |
4143 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
4144 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
4145 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
4146 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
4147 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
4148 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
4149 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
4150 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
4151 | ||
70d3fcab AH |
4152 | #define C_COMMON_FIXED_TYPES(NAME) \ |
4153 | if (type1 == short_ ## NAME ## _type_node \ | |
4154 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
4155 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
4156 | : short_ ## NAME ## _type_node; \ | |
4157 | if (type1 == NAME ## _type_node \ | |
4158 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
4159 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
4160 | : NAME ## _type_node; \ | |
4161 | if (type1 == long_ ## NAME ## _type_node \ | |
4162 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
4163 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
4164 | : long_ ## NAME ## _type_node; \ | |
4165 | if (type1 == long_long_ ## NAME ## _type_node \ | |
4166 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
4167 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
4168 | : long_long_ ## NAME ## _type_node; | |
4169 | ||
4170 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
4171 | if (type1 == NAME ## _type_node \ | |
4172 | || type1 == u ## NAME ## _type_node) \ | |
4173 | return unsignedp ? u ## NAME ## _type_node \ | |
4174 | : NAME ## _type_node; | |
4175 | ||
4176 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
4177 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
4178 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
4179 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
4180 | : sat_ ## short_ ## NAME ## _type_node; \ | |
4181 | if (type1 == sat_ ## NAME ## _type_node \ | |
4182 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
4183 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
4184 | : sat_ ## NAME ## _type_node; \ | |
4185 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
4186 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
4187 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
4188 | : sat_ ## long_ ## NAME ## _type_node; \ | |
4189 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
4190 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
4191 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
4192 | : sat_ ## long_long_ ## NAME ## _type_node; | |
4193 | ||
4194 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
4195 | if (type1 == sat_ ## NAME ## _type_node \ | |
4196 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
4197 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
4198 | : sat_ ## NAME ## _type_node; | |
4199 | ||
4200 | C_COMMON_FIXED_TYPES (fract); | |
4201 | C_COMMON_FIXED_TYPES_SAT (fract); | |
4202 | C_COMMON_FIXED_TYPES (accum); | |
4203 | C_COMMON_FIXED_TYPES_SAT (accum); | |
4204 | ||
4205 | C_COMMON_FIXED_MODE_TYPES (qq); | |
4206 | C_COMMON_FIXED_MODE_TYPES (hq); | |
4207 | C_COMMON_FIXED_MODE_TYPES (sq); | |
4208 | C_COMMON_FIXED_MODE_TYPES (dq); | |
4209 | C_COMMON_FIXED_MODE_TYPES (tq); | |
4210 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
4211 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
4212 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
4213 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
4214 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
4215 | C_COMMON_FIXED_MODE_TYPES (ha); | |
4216 | C_COMMON_FIXED_MODE_TYPES (sa); | |
4217 | C_COMMON_FIXED_MODE_TYPES (da); | |
4218 | C_COMMON_FIXED_MODE_TYPES (ta); | |
4219 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
4220 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
4221 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
4222 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
ab22c1fa | 4223 | |
bc15d0ef JM |
4224 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
4225 | the precision; they have precision set to match their range, but | |
4226 | may use a wider mode to match an ABI. If we change modes, we may | |
4227 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
4228 | the precision as well, so as to yield correct results for | |
4229 | bit-field types. C++ does not have these separate bit-field | |
4230 | types, and producing a signed or unsigned variant of an | |
4231 | ENUMERAL_TYPE may cause other problems as well. */ | |
4232 | ||
1e204133 RAE |
4233 | if (!INTEGRAL_TYPE_P (type) |
4234 | || TYPE_UNSIGNED (type) == unsignedp) | |
4235 | return type; | |
4236 | ||
bc15d0ef JM |
4237 | #define TYPE_OK(node) \ |
4238 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
41b81065 | 4239 | && TYPE_PRECISION (type) == TYPE_PRECISION (node)) |
bc15d0ef | 4240 | if (TYPE_OK (signed_char_type_node)) |
693a6128 | 4241 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
bc15d0ef | 4242 | if (TYPE_OK (integer_type_node)) |
693a6128 | 4243 | return unsignedp ? unsigned_type_node : integer_type_node; |
bc15d0ef | 4244 | if (TYPE_OK (short_integer_type_node)) |
693a6128 | 4245 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
bc15d0ef | 4246 | if (TYPE_OK (long_integer_type_node)) |
693a6128 | 4247 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
bc15d0ef | 4248 | if (TYPE_OK (long_long_integer_type_node)) |
693a6128 GRK |
4249 | return (unsignedp ? long_long_unsigned_type_node |
4250 | : long_long_integer_type_node); | |
78a7c317 DD |
4251 | |
4252 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
4253 | if (int_n_enabled_p[i] | |
4254 | && TYPE_MODE (type) == int_n_data[i].m | |
4255 | && TYPE_PRECISION (type) == int_n_data[i].bitsize) | |
4256 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4257 | : int_n_trees[i].signed_type); | |
4258 | ||
bc15d0ef | 4259 | if (TYPE_OK (widest_integer_literal_type_node)) |
693a6128 GRK |
4260 | return (unsignedp ? widest_unsigned_literal_type_node |
4261 | : widest_integer_literal_type_node); | |
4a063bec RH |
4262 | |
4263 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
bc15d0ef | 4264 | if (TYPE_OK (intTI_type_node)) |
4a063bec RH |
4265 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
4266 | #endif | |
bc15d0ef | 4267 | if (TYPE_OK (intDI_type_node)) |
4a063bec | 4268 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
bc15d0ef | 4269 | if (TYPE_OK (intSI_type_node)) |
4a063bec | 4270 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
bc15d0ef | 4271 | if (TYPE_OK (intHI_type_node)) |
4a063bec | 4272 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
bc15d0ef | 4273 | if (TYPE_OK (intQI_type_node)) |
4a063bec | 4274 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
bc15d0ef | 4275 | #undef TYPE_OK |
4a063bec | 4276 | |
41b81065 | 4277 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); |
693a6128 | 4278 | } |
9649812a | 4279 | |
38a4afee MM |
4280 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
4281 | ||
4282 | tree | |
4283 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
4284 | { | |
78a7c317 DD |
4285 | int i; |
4286 | ||
38a4afee MM |
4287 | /* Extended integer types of the same width as a standard type have |
4288 | lesser rank, so those of the same width as int promote to int or | |
4289 | unsigned int and are valid for printf formats expecting int or | |
4290 | unsigned int. To avoid such special cases, avoid creating | |
4291 | extended integer types for bit-fields if a standard integer type | |
4292 | is available. */ | |
4293 | if (width == TYPE_PRECISION (integer_type_node)) | |
4294 | return unsignedp ? unsigned_type_node : integer_type_node; | |
4295 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
4296 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
4297 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
4298 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
4299 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
4300 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
4301 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
4302 | return (unsignedp ? long_long_unsigned_type_node | |
4303 | : long_long_integer_type_node); | |
78a7c317 DD |
4304 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
4305 | if (int_n_enabled_p[i] | |
4306 | && width == int_n_data[i].bitsize) | |
4307 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4308 | : int_n_trees[i].signed_type); | |
38a4afee MM |
4309 | return build_nonstandard_integer_type (width, unsignedp); |
4310 | } | |
4311 | ||
9649812a MM |
4312 | /* The C version of the register_builtin_type langhook. */ |
4313 | ||
4314 | void | |
4315 | c_register_builtin_type (tree type, const char* name) | |
4316 | { | |
4317 | tree decl; | |
4318 | ||
c2255bc4 AH |
4319 | decl = build_decl (UNKNOWN_LOCATION, |
4320 | TYPE_DECL, get_identifier (name), type); | |
9649812a MM |
4321 | DECL_ARTIFICIAL (decl) = 1; |
4322 | if (!TYPE_NAME (type)) | |
4323 | TYPE_NAME (type) = decl; | |
4324 | pushdecl (decl); | |
d1d3865f ZW |
4325 | |
4326 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
9649812a | 4327 | } |
6acfe908 | 4328 | \f |
78ef5b89 | 4329 | /* Print an error message for invalid operands to arith operation |
ba47d38d AH |
4330 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. |
4331 | LOCATION is the location of the message. */ | |
b30f223b RS |
4332 | |
4333 | void | |
ba47d38d AH |
4334 | binary_op_error (location_t location, enum tree_code code, |
4335 | tree type0, tree type1) | |
b30f223b | 4336 | { |
b3694847 | 4337 | const char *opname; |
89c78d7d | 4338 | |
b30f223b RS |
4339 | switch (code) |
4340 | { | |
b30f223b RS |
4341 | case PLUS_EXPR: |
4342 | opname = "+"; break; | |
4343 | case MINUS_EXPR: | |
4344 | opname = "-"; break; | |
4345 | case MULT_EXPR: | |
4346 | opname = "*"; break; | |
4347 | case MAX_EXPR: | |
4348 | opname = "max"; break; | |
4349 | case MIN_EXPR: | |
4350 | opname = "min"; break; | |
4351 | case EQ_EXPR: | |
4352 | opname = "=="; break; | |
4353 | case NE_EXPR: | |
4354 | opname = "!="; break; | |
4355 | case LE_EXPR: | |
4356 | opname = "<="; break; | |
4357 | case GE_EXPR: | |
4358 | opname = ">="; break; | |
4359 | case LT_EXPR: | |
4360 | opname = "<"; break; | |
4361 | case GT_EXPR: | |
4362 | opname = ">"; break; | |
4363 | case LSHIFT_EXPR: | |
4364 | opname = "<<"; break; | |
4365 | case RSHIFT_EXPR: | |
4366 | opname = ">>"; break; | |
4367 | case TRUNC_MOD_EXPR: | |
047de90b | 4368 | case FLOOR_MOD_EXPR: |
b30f223b RS |
4369 | opname = "%"; break; |
4370 | case TRUNC_DIV_EXPR: | |
047de90b | 4371 | case FLOOR_DIV_EXPR: |
b30f223b RS |
4372 | opname = "/"; break; |
4373 | case BIT_AND_EXPR: | |
4374 | opname = "&"; break; | |
4375 | case BIT_IOR_EXPR: | |
4376 | opname = "|"; break; | |
4377 | case TRUTH_ANDIF_EXPR: | |
4378 | opname = "&&"; break; | |
4379 | case TRUTH_ORIF_EXPR: | |
4380 | opname = "||"; break; | |
4381 | case BIT_XOR_EXPR: | |
4382 | opname = "^"; break; | |
6d819282 | 4383 | default: |
37b2f290 | 4384 | gcc_unreachable (); |
b30f223b | 4385 | } |
ba47d38d AH |
4386 | error_at (location, |
4387 | "invalid operands to binary %s (have %qT and %qT)", opname, | |
4388 | type0, type1); | |
b30f223b RS |
4389 | } |
4390 | \f | |
50f305ca MLI |
4391 | /* Given an expression as a tree, return its original type. Do this |
4392 | by stripping any conversion that preserves the sign and precision. */ | |
4393 | static tree | |
4394 | expr_original_type (tree expr) | |
4395 | { | |
4396 | STRIP_SIGN_NOPS (expr); | |
4397 | return TREE_TYPE (expr); | |
4398 | } | |
4399 | ||
b30f223b RS |
4400 | /* Subroutine of build_binary_op, used for comparison operations. |
4401 | See if the operands have both been converted from subword integer types | |
4402 | and, if so, perhaps change them both back to their original type. | |
94dccd9d RS |
4403 | This function is also responsible for converting the two operands |
4404 | to the proper common type for comparison. | |
b30f223b RS |
4405 | |
4406 | The arguments of this function are all pointers to local variables | |
4407 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
4408 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
4409 | ||
393e8e8b MP |
4410 | LOC is the location of the comparison. |
4411 | ||
b30f223b RS |
4412 | If this function returns nonzero, it means that the comparison has |
4413 | a constant value. What this function returns is an expression for | |
4414 | that value. */ | |
4415 | ||
4416 | tree | |
393e8e8b MP |
4417 | shorten_compare (location_t loc, tree *op0_ptr, tree *op1_ptr, |
4418 | tree *restype_ptr, enum tree_code *rescode_ptr) | |
b30f223b | 4419 | { |
b3694847 | 4420 | tree type; |
b30f223b RS |
4421 | tree op0 = *op0_ptr; |
4422 | tree op1 = *op1_ptr; | |
4423 | int unsignedp0, unsignedp1; | |
4424 | int real1, real2; | |
4425 | tree primop0, primop1; | |
4426 | enum tree_code code = *rescode_ptr; | |
4427 | ||
4428 | /* Throw away any conversions to wider types | |
4429 | already present in the operands. */ | |
4430 | ||
828fb3ba JM |
4431 | primop0 = c_common_get_narrower (op0, &unsignedp0); |
4432 | primop1 = c_common_get_narrower (op1, &unsignedp1); | |
b30f223b | 4433 | |
126e6609 JJ |
4434 | /* If primopN is first sign-extended from primopN's precision to opN's |
4435 | precision, then zero-extended from opN's precision to | |
4436 | *restype_ptr precision, shortenings might be invalid. */ | |
4437 | if (TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (TREE_TYPE (op0)) | |
4438 | && TYPE_PRECISION (TREE_TYPE (op0)) < TYPE_PRECISION (*restype_ptr) | |
4439 | && !unsignedp0 | |
4440 | && TYPE_UNSIGNED (TREE_TYPE (op0))) | |
4441 | primop0 = op0; | |
4442 | if (TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (TREE_TYPE (op1)) | |
4443 | && TYPE_PRECISION (TREE_TYPE (op1)) < TYPE_PRECISION (*restype_ptr) | |
4444 | && !unsignedp1 | |
4445 | && TYPE_UNSIGNED (TREE_TYPE (op1))) | |
4446 | primop1 = op1; | |
4447 | ||
b30f223b RS |
4448 | /* Handle the case that OP0 does not *contain* a conversion |
4449 | but it *requires* conversion to FINAL_TYPE. */ | |
4450 | ||
4451 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
8df83eae | 4452 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b30f223b | 4453 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
8df83eae | 4454 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b30f223b RS |
4455 | |
4456 | /* If one of the operands must be floated, we cannot optimize. */ | |
4457 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
4458 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
4459 | ||
4460 | /* If first arg is constant, swap the args (changing operation | |
5af6001b RK |
4461 | so value is preserved), for canonicalization. Don't do this if |
4462 | the second arg is 0. */ | |
b30f223b | 4463 | |
5af6001b | 4464 | if (TREE_CONSTANT (primop0) |
ab22c1fa CF |
4465 | && !integer_zerop (primop1) && !real_zerop (primop1) |
4466 | && !fixed_zerop (primop1)) | |
b30f223b | 4467 | { |
fab27f52 MM |
4468 | std::swap (primop0, primop1); |
4469 | std::swap (op0, op1); | |
b30f223b RS |
4470 | *op0_ptr = op0; |
4471 | *op1_ptr = op1; | |
fab27f52 MM |
4472 | std::swap (unsignedp0, unsignedp1); |
4473 | std::swap (real1, real2); | |
b30f223b RS |
4474 | |
4475 | switch (code) | |
4476 | { | |
4477 | case LT_EXPR: | |
4478 | code = GT_EXPR; | |
4479 | break; | |
4480 | case GT_EXPR: | |
4481 | code = LT_EXPR; | |
4482 | break; | |
4483 | case LE_EXPR: | |
4484 | code = GE_EXPR; | |
4485 | break; | |
4486 | case GE_EXPR: | |
4487 | code = LE_EXPR; | |
4488 | break; | |
6d819282 MK |
4489 | default: |
4490 | break; | |
b30f223b RS |
4491 | } |
4492 | *rescode_ptr = code; | |
4493 | } | |
4494 | ||
4495 | /* If comparing an integer against a constant more bits wide, | |
4496 | maybe we can deduce a value of 1 or 0 independent of the data. | |
4497 | Or else truncate the constant now | |
4498 | rather than extend the variable at run time. | |
4499 | ||
4500 | This is only interesting if the constant is the wider arg. | |
4501 | Also, it is not safe if the constant is unsigned and the | |
4502 | variable arg is signed, since in this case the variable | |
4503 | would be sign-extended and then regarded as unsigned. | |
4504 | Our technique fails in this case because the lowest/highest | |
4505 | possible unsigned results don't follow naturally from the | |
4506 | lowest/highest possible values of the variable operand. | |
4507 | For just EQ_EXPR and NE_EXPR there is another technique that | |
4508 | could be used: see if the constant can be faithfully represented | |
4509 | in the other operand's type, by truncating it and reextending it | |
4510 | and see if that preserves the constant's value. */ | |
4511 | ||
4512 | if (!real1 && !real2 | |
ab22c1fa | 4513 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b30f223b RS |
4514 | && TREE_CODE (primop1) == INTEGER_CST |
4515 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
4516 | { | |
4517 | int min_gt, max_gt, min_lt, max_lt; | |
4518 | tree maxval, minval; | |
4519 | /* 1 if comparison is nominally unsigned. */ | |
8df83eae | 4520 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b30f223b RS |
4521 | tree val; |
4522 | ||
ceef8ce4 NB |
4523 | type = c_common_signed_or_unsigned_type (unsignedp0, |
4524 | TREE_TYPE (primop0)); | |
8bbd5685 | 4525 | |
b30f223b RS |
4526 | maxval = TYPE_MAX_VALUE (type); |
4527 | minval = TYPE_MIN_VALUE (type); | |
4528 | ||
4529 | if (unsignedp && !unsignedp0) | |
ceef8ce4 | 4530 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b30f223b RS |
4531 | |
4532 | if (TREE_TYPE (primop1) != *restype_ptr) | |
fae1b38d | 4533 | { |
af9c6659 NS |
4534 | /* Convert primop1 to target type, but do not introduce |
4535 | additional overflow. We know primop1 is an int_cst. */ | |
807e902e KZ |
4536 | primop1 = force_fit_type (*restype_ptr, |
4537 | wide_int::from | |
4538 | (primop1, | |
4539 | TYPE_PRECISION (*restype_ptr), | |
4540 | TYPE_SIGN (TREE_TYPE (primop1))), | |
4541 | 0, TREE_OVERFLOW (primop1)); | |
fae1b38d | 4542 | } |
b30f223b RS |
4543 | if (type != *restype_ptr) |
4544 | { | |
4545 | minval = convert (*restype_ptr, minval); | |
4546 | maxval = convert (*restype_ptr, maxval); | |
4547 | } | |
4548 | ||
807e902e KZ |
4549 | min_gt = tree_int_cst_lt (primop1, minval); |
4550 | max_gt = tree_int_cst_lt (primop1, maxval); | |
4551 | min_lt = tree_int_cst_lt (minval, primop1); | |
4552 | max_lt = tree_int_cst_lt (maxval, primop1); | |
b30f223b RS |
4553 | |
4554 | val = 0; | |
4555 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
4556 | if (code == NE_EXPR) | |
4557 | { | |
4558 | if (max_lt || min_gt) | |
de7df9eb | 4559 | val = truthvalue_true_node; |
b30f223b RS |
4560 | } |
4561 | else if (code == EQ_EXPR) | |
4562 | { | |
4563 | if (max_lt || min_gt) | |
de7df9eb | 4564 | val = truthvalue_false_node; |
b30f223b RS |
4565 | } |
4566 | else if (code == LT_EXPR) | |
4567 | { | |
4568 | if (max_lt) | |
de7df9eb | 4569 | val = truthvalue_true_node; |
b30f223b | 4570 | if (!min_lt) |
de7df9eb | 4571 | val = truthvalue_false_node; |
b30f223b RS |
4572 | } |
4573 | else if (code == GT_EXPR) | |
4574 | { | |
4575 | if (min_gt) | |
de7df9eb | 4576 | val = truthvalue_true_node; |
b30f223b | 4577 | if (!max_gt) |
de7df9eb | 4578 | val = truthvalue_false_node; |
b30f223b RS |
4579 | } |
4580 | else if (code == LE_EXPR) | |
4581 | { | |
4582 | if (!max_gt) | |
de7df9eb | 4583 | val = truthvalue_true_node; |
b30f223b | 4584 | if (min_gt) |
de7df9eb | 4585 | val = truthvalue_false_node; |
b30f223b RS |
4586 | } |
4587 | else if (code == GE_EXPR) | |
4588 | { | |
4589 | if (!min_lt) | |
de7df9eb | 4590 | val = truthvalue_true_node; |
b30f223b | 4591 | if (max_lt) |
de7df9eb | 4592 | val = truthvalue_false_node; |
b30f223b RS |
4593 | } |
4594 | ||
4595 | /* If primop0 was sign-extended and unsigned comparison specd, | |
4596 | we did a signed comparison above using the signed type bounds. | |
4597 | But the comparison we output must be unsigned. | |
4598 | ||
4599 | Also, for inequalities, VAL is no good; but if the signed | |
4600 | comparison had *any* fixed result, it follows that the | |
4601 | unsigned comparison just tests the sign in reverse | |
4602 | (positive values are LE, negative ones GE). | |
4603 | So we can generate an unsigned comparison | |
4604 | against an extreme value of the signed type. */ | |
4605 | ||
4606 | if (unsignedp && !unsignedp0) | |
4607 | { | |
4608 | if (val != 0) | |
4609 | switch (code) | |
4610 | { | |
4611 | case LT_EXPR: | |
4612 | case GE_EXPR: | |
4613 | primop1 = TYPE_MIN_VALUE (type); | |
4614 | val = 0; | |
4615 | break; | |
4616 | ||
4617 | case LE_EXPR: | |
4618 | case GT_EXPR: | |
4619 | primop1 = TYPE_MAX_VALUE (type); | |
4620 | val = 0; | |
4621 | break; | |
6d819282 MK |
4622 | |
4623 | default: | |
4624 | break; | |
b30f223b | 4625 | } |
12753674 | 4626 | type = c_common_unsigned_type (type); |
b30f223b RS |
4627 | } |
4628 | ||
ca7e759d | 4629 | if (TREE_CODE (primop0) != INTEGER_CST) |
b30f223b | 4630 | { |
de7df9eb | 4631 | if (val == truthvalue_false_node) |
50f305ca MLI |
4632 | warning_at (loc, OPT_Wtype_limits, |
4633 | "comparison is always false due to limited range of data type"); | |
de7df9eb | 4634 | if (val == truthvalue_true_node) |
50f305ca MLI |
4635 | warning_at (loc, OPT_Wtype_limits, |
4636 | "comparison is always true due to limited range of data type"); | |
b30f223b RS |
4637 | } |
4638 | ||
4639 | if (val != 0) | |
4640 | { | |
4641 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4642 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 | 4643 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b30f223b RS |
4644 | return val; |
4645 | } | |
4646 | ||
4647 | /* Value is not predetermined, but do the comparison | |
4648 | in the type of the operand that is not constant. | |
4649 | TYPE is already properly set. */ | |
4650 | } | |
9a8ce21f JG |
4651 | |
4652 | /* If either arg is decimal float and the other is float, find the | |
4653 | proper common type to use for comparison. */ | |
6f450181 RB |
4654 | else if (real1 && real2 |
4655 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
4656 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1)))) | |
4657 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4658 | ||
4659 | /* If either arg is decimal float and the other is float, fail. */ | |
9a8ce21f JG |
4660 | else if (real1 && real2 |
4661 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
4662 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
6f450181 | 4663 | return 0; |
9a8ce21f | 4664 | |
b30f223b | 4665 | else if (real1 && real2 |
766f6c30 RS |
4666 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
4667 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b30f223b RS |
4668 | type = TREE_TYPE (primop0); |
4669 | ||
4670 | /* If args' natural types are both narrower than nominal type | |
4671 | and both extend in the same manner, compare them | |
4672 | in the type of the wider arg. | |
4673 | Otherwise must actually extend both to the nominal | |
4674 | common type lest different ways of extending | |
4675 | alter the result. | |
4676 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
4677 | ||
4678 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
4679 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
4680 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
4681 | { | |
4682 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
ceef8ce4 | 4683 | type = c_common_signed_or_unsigned_type (unsignedp0 |
8df83eae | 4684 | || TYPE_UNSIGNED (*restype_ptr), |
ceef8ce4 | 4685 | type); |
b30f223b RS |
4686 | /* Make sure shorter operand is extended the right way |
4687 | to match the longer operand. */ | |
ceef8ce4 NB |
4688 | primop0 |
4689 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
4690 | TREE_TYPE (primop0)), | |
4691 | primop0); | |
4692 | primop1 | |
4693 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
4694 | TREE_TYPE (primop1)), | |
4695 | primop1); | |
b30f223b RS |
4696 | } |
4697 | else | |
4698 | { | |
4699 | /* Here we must do the comparison on the nominal type | |
4700 | using the args exactly as we received them. */ | |
4701 | type = *restype_ptr; | |
4702 | primop0 = op0; | |
4703 | primop1 = op1; | |
4704 | ||
4705 | if (!real1 && !real2 && integer_zerop (primop1) | |
8df83eae | 4706 | && TYPE_UNSIGNED (*restype_ptr)) |
b30f223b RS |
4707 | { |
4708 | tree value = 0; | |
50f305ca MLI |
4709 | /* All unsigned values are >= 0, so we warn. However, |
4710 | if OP0 is a constant that is >= 0, the signedness of | |
4711 | the comparison isn't an issue, so suppress the | |
4712 | warning. */ | |
4713 | bool warn = | |
8400e75e | 4714 | warn_type_limits && !in_system_header_at (loc) |
50f305ca MLI |
4715 | && !(TREE_CODE (primop0) == INTEGER_CST |
4716 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
4717 | primop0))) | |
4718 | /* Do not warn for enumeration types. */ | |
4719 | && (TREE_CODE (expr_original_type (primop0)) != ENUMERAL_TYPE); | |
4720 | ||
b30f223b RS |
4721 | switch (code) |
4722 | { | |
4723 | case GE_EXPR: | |
50f305ca MLI |
4724 | if (warn) |
4725 | warning_at (loc, OPT_Wtype_limits, | |
4726 | "comparison of unsigned expression >= 0 is always true"); | |
de7df9eb | 4727 | value = truthvalue_true_node; |
b30f223b RS |
4728 | break; |
4729 | ||
4730 | case LT_EXPR: | |
50f305ca MLI |
4731 | if (warn) |
4732 | warning_at (loc, OPT_Wtype_limits, | |
4733 | "comparison of unsigned expression < 0 is always false"); | |
de7df9eb | 4734 | value = truthvalue_false_node; |
6d819282 MK |
4735 | break; |
4736 | ||
4737 | default: | |
4738 | break; | |
b30f223b RS |
4739 | } |
4740 | ||
4741 | if (value != 0) | |
4742 | { | |
4743 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4744 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 RS |
4745 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
4746 | primop0, value); | |
b30f223b RS |
4747 | return value; |
4748 | } | |
4749 | } | |
4750 | } | |
4751 | ||
4752 | *op0_ptr = convert (type, primop0); | |
4753 | *op1_ptr = convert (type, primop1); | |
4754 | ||
de7df9eb | 4755 | *restype_ptr = truthvalue_type_node; |
b30f223b RS |
4756 | |
4757 | return 0; | |
4758 | } | |
4759 | \f | |
7552da58 JJ |
4760 | /* Return a tree for the sum or difference (RESULTCODE says which) |
4761 | of pointer PTROP and integer INTOP. */ | |
4762 | ||
4763 | tree | |
db3927fb | 4764 | pointer_int_sum (location_t loc, enum tree_code resultcode, |
fd9b0f32 | 4765 | tree ptrop, tree intop, bool complain) |
7552da58 | 4766 | { |
6ac01510 | 4767 | tree size_exp, ret; |
7552da58 | 4768 | |
7552da58 | 4769 | /* The result is a pointer of the same type that is being added. */ |
7552da58 JJ |
4770 | tree result_type = TREE_TYPE (ptrop); |
4771 | ||
4772 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
4773 | { | |
fd9b0f32 PC |
4774 | if (complain && warn_pointer_arith) |
4775 | pedwarn (loc, OPT_Wpointer_arith, | |
4776 | "pointer of type %<void *%> used in arithmetic"); | |
4777 | else if (!complain) | |
4778 | return error_mark_node; | |
7552da58 JJ |
4779 | size_exp = integer_one_node; |
4780 | } | |
4781 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
4782 | { | |
fd9b0f32 PC |
4783 | if (complain && warn_pointer_arith) |
4784 | pedwarn (loc, OPT_Wpointer_arith, | |
4785 | "pointer to a function used in arithmetic"); | |
4786 | else if (!complain) | |
4787 | return error_mark_node; | |
7552da58 JJ |
4788 | size_exp = integer_one_node; |
4789 | } | |
7552da58 JJ |
4790 | else |
4791 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
4792 | ||
6ac01510 ILT |
4793 | /* We are manipulating pointer values, so we don't need to warn |
4794 | about relying on undefined signed overflow. We disable the | |
4795 | warning here because we use integer types so fold won't know that | |
4796 | they are really pointers. */ | |
4797 | fold_defer_overflow_warnings (); | |
4798 | ||
7552da58 JJ |
4799 | /* If what we are about to multiply by the size of the elements |
4800 | contains a constant term, apply distributive law | |
4801 | and multiply that constant term separately. | |
4802 | This helps produce common subexpressions. */ | |
7552da58 | 4803 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
3f75a254 | 4804 | && !TREE_CONSTANT (intop) |
7552da58 JJ |
4805 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
4806 | && TREE_CONSTANT (size_exp) | |
4807 | /* If the constant comes from pointer subtraction, | |
4808 | skip this optimization--it would cause an error. */ | |
4809 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
4810 | /* If the constant is unsigned, and smaller than the pointer size, | |
4811 | then we must skip this optimization. This is because it could cause | |
4812 | an overflow error if the constant is negative but INTOP is not. */ | |
3f75a254 | 4813 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
7552da58 JJ |
4814 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
4815 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
4816 | { | |
4817 | enum tree_code subcode = resultcode; | |
4818 | tree int_type = TREE_TYPE (intop); | |
4819 | if (TREE_CODE (intop) == MINUS_EXPR) | |
4820 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
4821 | /* Convert both subexpression types to the type of intop, | |
4822 | because weird cases involving pointer arithmetic | |
4823 | can result in a sum or difference with different type args. */ | |
ba47d38d AH |
4824 | ptrop = build_binary_op (EXPR_LOCATION (TREE_OPERAND (intop, 1)), |
4825 | subcode, ptrop, | |
7552da58 JJ |
4826 | convert (int_type, TREE_OPERAND (intop, 1)), 1); |
4827 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
4828 | } | |
4829 | ||
4830 | /* Convert the integer argument to a type the same size as sizetype | |
4831 | so the multiply won't overflow spuriously. */ | |
7552da58 | 4832 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
8df83eae | 4833 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
35b1a6fa | 4834 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
8df83eae | 4835 | TYPE_UNSIGNED (sizetype)), intop); |
7552da58 JJ |
4836 | |
4837 | /* Replace the integer argument with a suitable product by the object size. | |
9e9ef331 | 4838 | Do this multiplication as signed, then convert to the appropriate type |
65de6659 | 4839 | for the pointer operation and disregard an overflow that occurred only |
9e9ef331 EB |
4840 | because of the sign-extension change in the latter conversion. */ |
4841 | { | |
4842 | tree t = build_binary_op (loc, | |
4843 | MULT_EXPR, intop, | |
4844 | convert (TREE_TYPE (intop), size_exp), 1); | |
4845 | intop = convert (sizetype, t); | |
4846 | if (TREE_OVERFLOW_P (intop) && !TREE_OVERFLOW (t)) | |
807e902e | 4847 | intop = wide_int_to_tree (TREE_TYPE (intop), intop); |
9e9ef331 | 4848 | } |
5be014d5 | 4849 | |
280f1ffa | 4850 | /* Create the sum or difference. */ |
5be014d5 | 4851 | if (resultcode == MINUS_EXPR) |
db3927fb | 4852 | intop = fold_build1_loc (loc, NEGATE_EXPR, sizetype, intop); |
7552da58 | 4853 | |
5d49b6a7 | 4854 | ret = fold_build_pointer_plus_loc (loc, ptrop, intop); |
6ac01510 ILT |
4855 | |
4856 | fold_undefer_and_ignore_overflow_warnings (); | |
4857 | ||
4858 | return ret; | |
7552da58 JJ |
4859 | } |
4860 | \f | |
e5a94231 JM |
4861 | /* Wrap a C_MAYBE_CONST_EXPR around an expression that is fully folded |
4862 | and if NON_CONST is known not to be permitted in an evaluated part | |
4863 | of a constant expression. */ | |
4864 | ||
4865 | tree | |
4866 | c_wrap_maybe_const (tree expr, bool non_const) | |
4867 | { | |
4868 | bool nowarning = TREE_NO_WARNING (expr); | |
4869 | location_t loc = EXPR_LOCATION (expr); | |
4870 | ||
4871 | /* This should never be called for C++. */ | |
4872 | if (c_dialect_cxx ()) | |
4873 | gcc_unreachable (); | |
4874 | ||
4875 | /* The result of folding may have a NOP_EXPR to set TREE_NO_WARNING. */ | |
4876 | STRIP_TYPE_NOPS (expr); | |
4877 | expr = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL, expr); | |
4878 | C_MAYBE_CONST_EXPR_NON_CONST (expr) = non_const; | |
4879 | if (nowarning) | |
4880 | TREE_NO_WARNING (expr) = 1; | |
4881 | protected_set_expr_location (expr, loc); | |
4882 | ||
4883 | return expr; | |
4884 | } | |
4885 | ||
928c19bb JM |
4886 | /* Wrap a SAVE_EXPR around EXPR, if appropriate. Like save_expr, but |
4887 | for C folds the inside expression and wraps a C_MAYBE_CONST_EXPR | |
4888 | around the SAVE_EXPR if needed so that c_fully_fold does not need | |
4889 | to look inside SAVE_EXPRs. */ | |
4890 | ||
4891 | tree | |
4892 | c_save_expr (tree expr) | |
4893 | { | |
4894 | bool maybe_const = true; | |
4895 | if (c_dialect_cxx ()) | |
4896 | return save_expr (expr); | |
4897 | expr = c_fully_fold (expr, false, &maybe_const); | |
4898 | expr = save_expr (expr); | |
4899 | if (!maybe_const) | |
e5a94231 | 4900 | expr = c_wrap_maybe_const (expr, true); |
928c19bb JM |
4901 | return expr; |
4902 | } | |
4903 | ||
b3c6d2ea ILT |
4904 | /* Return whether EXPR is a declaration whose address can never be |
4905 | NULL. */ | |
4906 | ||
4907 | bool | |
58f9752a | 4908 | decl_with_nonnull_addr_p (const_tree expr) |
b3c6d2ea ILT |
4909 | { |
4910 | return (DECL_P (expr) | |
4911 | && (TREE_CODE (expr) == PARM_DECL | |
4912 | || TREE_CODE (expr) == LABEL_DECL | |
4913 | || !DECL_WEAK (expr))); | |
4914 | } | |
4915 | ||
b30f223b | 4916 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
85498824 JM |
4917 | or for an `if' or `while' statement or ?..: exp. It should already |
4918 | have been validated to be of suitable type; otherwise, a bad | |
4919 | diagnostic may result. | |
b30f223b | 4920 | |
ba47d38d AH |
4921 | The EXPR is located at LOCATION. |
4922 | ||
b30f223b RS |
4923 | This preparation consists of taking the ordinary |
4924 | representation of an expression expr and producing a valid tree | |
4925 | boolean expression describing whether expr is nonzero. We could | |
de7df9eb | 4926 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b30f223b RS |
4927 | but we optimize comparisons, &&, ||, and !. |
4928 | ||
de7df9eb | 4929 | The resulting type should always be `truthvalue_type_node'. */ |
b30f223b RS |
4930 | |
4931 | tree | |
ba47d38d | 4932 | c_common_truthvalue_conversion (location_t location, tree expr) |
b30f223b | 4933 | { |
b30f223b RS |
4934 | switch (TREE_CODE (expr)) |
4935 | { | |
d1a7edaf | 4936 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
6f312d18 ZW |
4937 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
4938 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
4939 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
90ec750d RS |
4940 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4941 | return expr; | |
c2255bc4 | 4942 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
90ec750d | 4943 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); |
c2255bc4 | 4944 | goto ret; |
90ec750d | 4945 | |
b30f223b RS |
4946 | case TRUTH_ANDIF_EXPR: |
4947 | case TRUTH_ORIF_EXPR: | |
4948 | case TRUTH_AND_EXPR: | |
4949 | case TRUTH_OR_EXPR: | |
9379fac9 | 4950 | case TRUTH_XOR_EXPR: |
90ec750d RS |
4951 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4952 | return expr; | |
c2255bc4 | 4953 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
b8698a0f | 4954 | c_common_truthvalue_conversion (location, |
c2255bc4 AH |
4955 | TREE_OPERAND (expr, 0)), |
4956 | c_common_truthvalue_conversion (location, | |
4957 | TREE_OPERAND (expr, 1))); | |
4958 | goto ret; | |
18c0f675 | 4959 | |
18d00205 | 4960 | case TRUTH_NOT_EXPR: |
90ec750d RS |
4961 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4962 | return expr; | |
c2255bc4 AH |
4963 | expr = build1 (TREE_CODE (expr), truthvalue_type_node, |
4964 | c_common_truthvalue_conversion (location, | |
4965 | TREE_OPERAND (expr, 0))); | |
4966 | goto ret; | |
18d00205 | 4967 | |
b30f223b RS |
4968 | case ERROR_MARK: |
4969 | return expr; | |
4970 | ||
4971 | case INTEGER_CST: | |
d95787e6 RS |
4972 | return integer_zerop (expr) ? truthvalue_false_node |
4973 | : truthvalue_true_node; | |
b30f223b RS |
4974 | |
4975 | case REAL_CST: | |
010c4d9c RS |
4976 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
4977 | ? truthvalue_true_node | |
4978 | : truthvalue_false_node; | |
b30f223b | 4979 | |
ab22c1fa CF |
4980 | case FIXED_CST: |
4981 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
4982 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
4983 | ? truthvalue_true_node | |
4984 | : truthvalue_false_node; | |
4985 | ||
90ec750d | 4986 | case FUNCTION_DECL: |
c9f9eb5d | 4987 | expr = build_unary_op (location, ADDR_EXPR, expr, 0); |
90ec750d RS |
4988 | /* Fall through. */ |
4989 | ||
b30f223b | 4990 | case ADDR_EXPR: |
1998463c | 4991 | { |
f6f08360 | 4992 | tree inner = TREE_OPERAND (expr, 0); |
b3c6d2ea | 4993 | if (decl_with_nonnull_addr_p (inner)) |
1998463c | 4994 | { |
b3c6d2ea | 4995 | /* Common Ada/Pascal programmer's mistake. */ |
ba47d38d AH |
4996 | warning_at (location, |
4997 | OPT_Waddress, | |
4998 | "the address of %qD will always evaluate as %<true%>", | |
4999 | inner); | |
1998463c SB |
5000 | return truthvalue_true_node; |
5001 | } | |
33766b66 | 5002 | break; |
1998463c | 5003 | } |
b30f223b | 5004 | |
766f6c30 | 5005 | case COMPLEX_EXPR: |
c2255bc4 | 5006 | expr = build_binary_op (EXPR_LOCATION (expr), |
ba47d38d | 5007 | (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
b839fb3f | 5008 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
ba47d38d AH |
5009 | c_common_truthvalue_conversion (location, |
5010 | TREE_OPERAND (expr, 0)), | |
5011 | c_common_truthvalue_conversion (location, | |
5012 | TREE_OPERAND (expr, 1)), | |
766f6c30 | 5013 | 0); |
c2255bc4 | 5014 | goto ret; |
766f6c30 | 5015 | |
b30f223b RS |
5016 | case NEGATE_EXPR: |
5017 | case ABS_EXPR: | |
5018 | case FLOAT_EXPR: | |
8ce94e44 | 5019 | case EXCESS_PRECISION_EXPR: |
da7d8304 | 5020 | /* These don't change whether an object is nonzero or zero. */ |
ba47d38d | 5021 | return c_common_truthvalue_conversion (location, TREE_OPERAND (expr, 0)); |
b30f223b RS |
5022 | |
5023 | case LROTATE_EXPR: | |
5024 | case RROTATE_EXPR: | |
da7d8304 | 5025 | /* These don't change whether an object is zero or nonzero, but |
b30f223b RS |
5026 | we can't ignore them if their second arg has side-effects. */ |
5027 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
c2255bc4 AH |
5028 | { |
5029 | expr = build2 (COMPOUND_EXPR, truthvalue_type_node, | |
5030 | TREE_OPERAND (expr, 1), | |
b8698a0f | 5031 | c_common_truthvalue_conversion |
c2255bc4 AH |
5032 | (location, TREE_OPERAND (expr, 0))); |
5033 | goto ret; | |
5034 | } | |
b30f223b | 5035 | else |
ba47d38d AH |
5036 | return c_common_truthvalue_conversion (location, |
5037 | TREE_OPERAND (expr, 0)); | |
b57062ca | 5038 | |
b30f223b RS |
5039 | case COND_EXPR: |
5040 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
928c19bb | 5041 | if (c_dialect_cxx ()) |
c2255bc4 | 5042 | { |
4cc4f2f4 JJ |
5043 | tree op1 = TREE_OPERAND (expr, 1); |
5044 | tree op2 = TREE_OPERAND (expr, 2); | |
5045 | /* In C++ one of the arms might have void type if it is throw. */ | |
5046 | if (!VOID_TYPE_P (TREE_TYPE (op1))) | |
5047 | op1 = c_common_truthvalue_conversion (location, op1); | |
5048 | if (!VOID_TYPE_P (TREE_TYPE (op2))) | |
5049 | op2 = c_common_truthvalue_conversion (location, op2); | |
db3927fb | 5050 | expr = fold_build3_loc (location, COND_EXPR, truthvalue_type_node, |
4cc4f2f4 | 5051 | TREE_OPERAND (expr, 0), op1, op2); |
c2255bc4 AH |
5052 | goto ret; |
5053 | } | |
928c19bb | 5054 | else |
c2255bc4 AH |
5055 | { |
5056 | /* Folding will happen later for C. */ | |
5057 | expr = build3 (COND_EXPR, truthvalue_type_node, | |
5058 | TREE_OPERAND (expr, 0), | |
5059 | c_common_truthvalue_conversion (location, | |
5060 | TREE_OPERAND (expr, 1)), | |
5061 | c_common_truthvalue_conversion (location, | |
5062 | TREE_OPERAND (expr, 2))); | |
5063 | goto ret; | |
5064 | } | |
b30f223b | 5065 | |
1043771b | 5066 | CASE_CONVERT: |
1ee44b26 JM |
5067 | { |
5068 | tree totype = TREE_TYPE (expr); | |
5069 | tree fromtype = TREE_TYPE (TREE_OPERAND (expr, 0)); | |
5070 | ||
076fecad PP |
5071 | if (POINTER_TYPE_P (totype) |
5072 | && TREE_CODE (fromtype) == REFERENCE_TYPE) | |
5073 | { | |
5074 | tree inner = expr; | |
5075 | STRIP_NOPS (inner); | |
5076 | ||
5077 | if (DECL_P (inner)) | |
5078 | warning_at (location, | |
5079 | OPT_Waddress, | |
5080 | "the compiler can assume that the address of " | |
5081 | "%qD will always evaluate to %<true%>", | |
5082 | inner); | |
5083 | } | |
5084 | ||
1ee44b26 JM |
5085 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
5086 | since that affects how `default_conversion' will behave. */ | |
5087 | if (TREE_CODE (totype) == REFERENCE_TYPE | |
5088 | || TREE_CODE (fromtype) == REFERENCE_TYPE) | |
5089 | break; | |
5090 | /* Don't strip a conversion from C++0x scoped enum, since they | |
5091 | don't implicitly convert to other types. */ | |
5092 | if (TREE_CODE (fromtype) == ENUMERAL_TYPE | |
5093 | && ENUM_IS_SCOPED (fromtype)) | |
5094 | break; | |
5095 | /* If this isn't narrowing the argument, we can ignore it. */ | |
5096 | if (TYPE_PRECISION (totype) >= TYPE_PRECISION (fromtype)) | |
5097 | return c_common_truthvalue_conversion (location, | |
5098 | TREE_OPERAND (expr, 0)); | |
5099 | } | |
b30f223b RS |
5100 | break; |
5101 | ||
e2aab13d | 5102 | case MODIFY_EXPR: |
fbc8d2d3 ILT |
5103 | if (!TREE_NO_WARNING (expr) |
5104 | && warn_parentheses) | |
5105 | { | |
5106 | warning (OPT_Wparentheses, | |
5107 | "suggest parentheses around assignment used as truth value"); | |
5108 | TREE_NO_WARNING (expr) = 1; | |
5109 | } | |
e2aab13d | 5110 | break; |
b57062ca | 5111 | |
6d819282 MK |
5112 | default: |
5113 | break; | |
b30f223b RS |
5114 | } |
5115 | ||
f0b996c5 | 5116 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
f0b8d9aa | 5117 | { |
5386338c | 5118 | tree t = (in_late_binary_op ? save_expr (expr) : c_save_expr (expr)); |
c2255bc4 | 5119 | expr = (build_binary_op |
ba47d38d AH |
5120 | (EXPR_LOCATION (expr), |
5121 | (TREE_SIDE_EFFECTS (expr) | |
f0b8d9aa | 5122 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
c9f9eb5d AH |
5123 | c_common_truthvalue_conversion |
5124 | (location, | |
5125 | build_unary_op (location, REALPART_EXPR, t, 0)), | |
5126 | c_common_truthvalue_conversion | |
5127 | (location, | |
5128 | build_unary_op (location, IMAGPART_EXPR, t, 0)), | |
f0b8d9aa | 5129 | 0)); |
c2255bc4 | 5130 | goto ret; |
f0b8d9aa | 5131 | } |
f0b996c5 | 5132 | |
ab22c1fa CF |
5133 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
5134 | { | |
5135 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
5136 | FCONST0 (TYPE_MODE | |
5137 | (TREE_TYPE (expr)))); | |
ca80e52b | 5138 | return build_binary_op (location, NE_EXPR, expr, fixed_zero_node, 1); |
ab22c1fa | 5139 | } |
c2255bc4 AH |
5140 | else |
5141 | return build_binary_op (location, NE_EXPR, expr, integer_zero_node, 1); | |
ab22c1fa | 5142 | |
c2255bc4 AH |
5143 | ret: |
5144 | protected_set_expr_location (expr, location); | |
5145 | return expr; | |
b30f223b RS |
5146 | } |
5147 | \f | |
9bc15050 RG |
5148 | static void def_builtin_1 (enum built_in_function fncode, |
5149 | const char *name, | |
5150 | enum built_in_class fnclass, | |
5151 | tree fntype, tree libtype, | |
5152 | bool both_p, bool fallback_p, bool nonansi_p, | |
5153 | tree fnattrs, bool implicit_p); | |
fc2aaf30 | 5154 | |
3932261a MM |
5155 | |
5156 | /* Apply the TYPE_QUALS to the new DECL. */ | |
5157 | ||
5158 | void | |
35b1a6fa | 5159 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
3932261a | 5160 | { |
4b011bbf | 5161 | tree type = TREE_TYPE (decl); |
9f63daea | 5162 | |
5a6159dd AP |
5163 | if (type == error_mark_node) |
5164 | return; | |
4b011bbf | 5165 | |
329af3c7 JM |
5166 | if ((type_quals & TYPE_QUAL_CONST) |
5167 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
5168 | /* We used to check TYPE_NEEDS_CONSTRUCTING here, but now a constexpr | |
5169 | constructor can produce constant init, so rely on cp_finish_decl to | |
5170 | clear TREE_READONLY if the variable has non-constant init. */ | |
3932261a MM |
5171 | TREE_READONLY (decl) = 1; |
5172 | if (type_quals & TYPE_QUAL_VOLATILE) | |
5173 | { | |
5174 | TREE_SIDE_EFFECTS (decl) = 1; | |
5175 | TREE_THIS_VOLATILE (decl) = 1; | |
5176 | } | |
6946bc60 | 5177 | if (type_quals & TYPE_QUAL_RESTRICT) |
3932261a | 5178 | { |
4b011bbf JM |
5179 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
5180 | /* Allow 'restrict' on arrays of pointers. | |
5181 | FIXME currently we just ignore it. */ | |
5182 | type = TREE_TYPE (type); | |
5183 | if (!type | |
5184 | || !POINTER_TYPE_P (type) | |
5185 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
bda67431 | 5186 | error ("invalid use of %<restrict%>"); |
3932261a MM |
5187 | } |
5188 | } | |
5189 | ||
ca752f39 | 5190 | struct c_type_hasher : ggc_ptr_hash<tree_node> |
2a22f99c TS |
5191 | { |
5192 | static hashval_t hash (tree); | |
5193 | static bool equal (tree, tree); | |
5194 | }; | |
5195 | ||
6de9cd9a DN |
5196 | /* Hash function for the problem of multiple type definitions in |
5197 | different files. This must hash all types that will compare | |
5198 | equal via comptypes to the same value. In practice it hashes | |
9cf737f8 | 5199 | on some of the simple stuff and leaves the details to comptypes. */ |
6de9cd9a | 5200 | |
2a22f99c TS |
5201 | hashval_t |
5202 | c_type_hasher::hash (tree t) | |
6de9cd9a | 5203 | { |
a19e4d44 | 5204 | int n_elements; |
6de9cd9a | 5205 | int shift, size; |
6de9cd9a DN |
5206 | tree t2; |
5207 | switch (TREE_CODE (t)) | |
5208 | { | |
8c27b7d4 | 5209 | /* For pointers, hash on pointee type plus some swizzling. */ |
325c3691 | 5210 | case POINTER_TYPE: |
2a22f99c | 5211 | return hash (TREE_TYPE (t)) ^ 0x3003003; |
325c3691 RH |
5212 | /* Hash on number of elements and total size. */ |
5213 | case ENUMERAL_TYPE: | |
5214 | shift = 3; | |
5215 | t2 = TYPE_VALUES (t); | |
5216 | break; | |
5217 | case RECORD_TYPE: | |
5218 | shift = 0; | |
5219 | t2 = TYPE_FIELDS (t); | |
5220 | break; | |
5221 | case QUAL_UNION_TYPE: | |
5222 | shift = 1; | |
5223 | t2 = TYPE_FIELDS (t); | |
5224 | break; | |
5225 | case UNION_TYPE: | |
5226 | shift = 2; | |
5227 | t2 = TYPE_FIELDS (t); | |
5228 | break; | |
5229 | default: | |
366de0ce | 5230 | gcc_unreachable (); |
6de9cd9a | 5231 | } |
a19e4d44 NF |
5232 | /* FIXME: We want to use a DECL_CHAIN iteration method here, but |
5233 | TYPE_VALUES of ENUMERAL_TYPEs is stored as a TREE_LIST. */ | |
5234 | n_elements = list_length (t2); | |
6fc3c3c0 TT |
5235 | /* We might have a VLA here. */ |
5236 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
5237 | size = 0; | |
5238 | else | |
5239 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); | |
a19e4d44 | 5240 | return ((size << 24) | (n_elements << shift)); |
6de9cd9a DN |
5241 | } |
5242 | ||
2a22f99c TS |
5243 | bool |
5244 | c_type_hasher::equal (tree t1, tree t2) | |
5245 | { | |
5246 | return lang_hooks.types_compatible_p (t1, t2); | |
5247 | } | |
5248 | ||
5249 | static GTY(()) hash_table<c_type_hasher> *type_hash_table; | |
4fe52ce9 | 5250 | |
41472af8 | 5251 | /* Return the typed-based alias set for T, which may be an expression |
3bdf5ad1 | 5252 | or a type. Return -1 if we don't do anything special. */ |
41472af8 | 5253 | |
4862826d | 5254 | alias_set_type |
35b1a6fa | 5255 | c_common_get_alias_set (tree t) |
41472af8 | 5256 | { |
08bc2431 | 5257 | tree u; |
35b1a6fa | 5258 | |
cb9c2485 JM |
5259 | /* For VLAs, use the alias set of the element type rather than the |
5260 | default of alias set 0 for types compared structurally. */ | |
5261 | if (TYPE_P (t) && TYPE_STRUCTURAL_EQUALITY_P (t)) | |
5262 | { | |
5263 | if (TREE_CODE (t) == ARRAY_TYPE) | |
5264 | return get_alias_set (TREE_TYPE (t)); | |
5265 | return -1; | |
5266 | } | |
5267 | ||
08bc2431 MM |
5268 | /* Permit type-punning when accessing a union, provided the access |
5269 | is directly through the union. For example, this code does not | |
5270 | permit taking the address of a union member and then storing | |
5271 | through it. Even the type-punning allowed here is a GCC | |
5272 | extension, albeit a common and useful one; the C standard says | |
5273 | that such accesses have implementation-defined behavior. */ | |
5274 | for (u = t; | |
5275 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
5276 | u = TREE_OPERAND (u, 0)) | |
5277 | if (TREE_CODE (u) == COMPONENT_REF | |
5278 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
5279 | return 0; | |
ece32014 | 5280 | |
74d86f4f | 5281 | /* That's all the expressions we handle specially. */ |
3f75a254 | 5282 | if (!TYPE_P (t)) |
74d86f4f RH |
5283 | return -1; |
5284 | ||
95bd1dd7 | 5285 | /* The C standard guarantees that any object may be accessed via an |
74d86f4f RH |
5286 | lvalue that has character type. */ |
5287 | if (t == char_type_node | |
5288 | || t == signed_char_type_node | |
5289 | || t == unsigned_char_type_node) | |
3bdf5ad1 | 5290 | return 0; |
3932261a | 5291 | |
f824e5c3 RK |
5292 | /* The C standard specifically allows aliasing between signed and |
5293 | unsigned variants of the same type. We treat the signed | |
5294 | variant as canonical. */ | |
8df83eae | 5295 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
8f215dce | 5296 | { |
ceef8ce4 | 5297 | tree t1 = c_common_signed_type (t); |
f824e5c3 | 5298 | |
8f215dce JJ |
5299 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
5300 | if (t1 != t) | |
5301 | return get_alias_set (t1); | |
5302 | } | |
ece32014 | 5303 | |
6de9cd9a DN |
5304 | /* Handle the case of multiple type nodes referring to "the same" type, |
5305 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
5306 | C90 is handled. (In C99 type compatibility is not transitive, which | |
5307 | complicates things mightily. The alias set splay trees can theoretically | |
5308 | represent this, but insertion is tricky when you consider all the | |
5309 | different orders things might arrive in.) */ | |
5310 | ||
5311 | if (c_language != clk_c || flag_isoc99) | |
5312 | return -1; | |
5313 | ||
9cf737f8 | 5314 | /* Save time if there's only one input file. */ |
d974312d | 5315 | if (num_in_fnames == 1) |
6de9cd9a DN |
5316 | return -1; |
5317 | ||
5318 | /* Pointers need special handling if they point to any type that | |
5319 | needs special handling (below). */ | |
5320 | if (TREE_CODE (t) == POINTER_TYPE) | |
5321 | { | |
5322 | tree t2; | |
5323 | /* Find bottom type under any nested POINTERs. */ | |
9f63daea | 5324 | for (t2 = TREE_TYPE (t); |
762f7d9d TT |
5325 | TREE_CODE (t2) == POINTER_TYPE; |
5326 | t2 = TREE_TYPE (t2)) | |
5327 | ; | |
9f63daea | 5328 | if (TREE_CODE (t2) != RECORD_TYPE |
762f7d9d TT |
5329 | && TREE_CODE (t2) != ENUMERAL_TYPE |
5330 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
5331 | && TREE_CODE (t2) != UNION_TYPE) | |
5332 | return -1; | |
6de9cd9a | 5333 | if (TYPE_SIZE (t2) == 0) |
762f7d9d | 5334 | return -1; |
6de9cd9a DN |
5335 | } |
5336 | /* These are the only cases that need special handling. */ | |
9f63daea | 5337 | if (TREE_CODE (t) != RECORD_TYPE |
6de9cd9a DN |
5338 | && TREE_CODE (t) != ENUMERAL_TYPE |
5339 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
5340 | && TREE_CODE (t) != UNION_TYPE | |
5341 | && TREE_CODE (t) != POINTER_TYPE) | |
5342 | return -1; | |
5343 | /* Undefined? */ | |
5344 | if (TYPE_SIZE (t) == 0) | |
5345 | return -1; | |
5346 | ||
9f63daea | 5347 | /* Look up t in hash table. Only one of the compatible types within each |
6de9cd9a DN |
5348 | alias set is recorded in the table. */ |
5349 | if (!type_hash_table) | |
2a22f99c TS |
5350 | type_hash_table = hash_table<c_type_hasher>::create_ggc (1021); |
5351 | tree *slot = type_hash_table->find_slot (t, INSERT); | |
6de9cd9a | 5352 | if (*slot != NULL) |
6a3203c8 AP |
5353 | { |
5354 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
5355 | return TYPE_ALIAS_SET ((tree)*slot); | |
5356 | } | |
6de9cd9a DN |
5357 | else |
5358 | /* Our caller will assign and record (in t) a new alias set; all we need | |
5359 | to do is remember t in the hash table. */ | |
5360 | *slot = t; | |
5361 | ||
3bdf5ad1 | 5362 | return -1; |
41472af8 | 5363 | } |
0213a355 | 5364 | \f |
c2255bc4 | 5365 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where |
296674db | 5366 | the IS_SIZEOF parameter indicates which operator is being applied. |
c2255bc4 AH |
5367 | The COMPLAIN flag controls whether we should diagnose possibly |
5368 | ill-formed constructs or not. LOC is the location of the SIZEOF or | |
296674db JM |
5369 | TYPEOF operator. If MIN_ALIGNOF, the least alignment required for |
5370 | a type in any context should be returned, rather than the normal | |
5371 | alignment for that type. */ | |
03a08664 | 5372 | |
0213a355 | 5373 | tree |
c2255bc4 | 5374 | c_sizeof_or_alignof_type (location_t loc, |
296674db JM |
5375 | tree type, bool is_sizeof, bool min_alignof, |
5376 | int complain) | |
0213a355 | 5377 | { |
fa72b064 GDR |
5378 | const char *op_name; |
5379 | tree value = NULL; | |
5380 | enum tree_code type_code = TREE_CODE (type); | |
35b1a6fa | 5381 | |
03a08664 | 5382 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
35b1a6fa | 5383 | |
fa72b064 | 5384 | if (type_code == FUNCTION_TYPE) |
0213a355 | 5385 | { |
03a08664 | 5386 | if (is_sizeof) |
fa72b064 | 5387 | { |
44d90fe1 PC |
5388 | if (complain && warn_pointer_arith) |
5389 | pedwarn (loc, OPT_Wpointer_arith, | |
fcf73884 | 5390 | "invalid application of %<sizeof%> to a function type"); |
5ade1ed2 DG |
5391 | else if (!complain) |
5392 | return error_mark_node; | |
fa72b064 GDR |
5393 | value = size_one_node; |
5394 | } | |
5395 | else | |
d19fa6b5 JM |
5396 | { |
5397 | if (complain) | |
5398 | { | |
5399 | if (c_dialect_cxx ()) | |
c1771a20 | 5400 | pedwarn (loc, OPT_Wpedantic, "ISO C++ does not permit " |
d19fa6b5 JM |
5401 | "%<alignof%> applied to a function type"); |
5402 | else | |
c1771a20 | 5403 | pedwarn (loc, OPT_Wpedantic, "ISO C does not permit " |
d19fa6b5 JM |
5404 | "%<_Alignof%> applied to a function type"); |
5405 | } | |
5406 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
5407 | } | |
fa72b064 GDR |
5408 | } |
5409 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
5410 | { | |
35b1a6fa | 5411 | if (type_code == VOID_TYPE |
44d90fe1 PC |
5412 | && complain && warn_pointer_arith) |
5413 | pedwarn (loc, OPT_Wpointer_arith, | |
fcf73884 | 5414 | "invalid application of %qs to a void type", op_name); |
5ade1ed2 DG |
5415 | else if (!complain) |
5416 | return error_mark_node; | |
fa72b064 | 5417 | value = size_one_node; |
0213a355 | 5418 | } |
73ac190a PC |
5419 | else if (!COMPLETE_TYPE_P (type) |
5420 | && (!c_dialect_cxx () || is_sizeof || type_code != ARRAY_TYPE)) | |
0213a355 | 5421 | { |
ea793912 | 5422 | if (complain) |
73ac190a | 5423 | error_at (loc, "invalid application of %qs to incomplete type %qT", |
c2255bc4 | 5424 | op_name, type); |
cb6addf4 | 5425 | return error_mark_node; |
0213a355 | 5426 | } |
73ac190a PC |
5427 | else if (c_dialect_cxx () && type_code == ARRAY_TYPE |
5428 | && !COMPLETE_TYPE_P (TREE_TYPE (type))) | |
5429 | { | |
5430 | if (complain) | |
5431 | error_at (loc, "invalid application of %qs to array type %qT of " | |
5432 | "incomplete element type", op_name, type); | |
5433 | return error_mark_node; | |
5434 | } | |
0213a355 | 5435 | else |
fa72b064 | 5436 | { |
03a08664 | 5437 | if (is_sizeof) |
fa72b064 | 5438 | /* Convert in case a char is more than one unit. */ |
db3927fb AH |
5439 | value = size_binop_loc (loc, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
5440 | size_int (TYPE_PRECISION (char_type_node) | |
5441 | / BITS_PER_UNIT)); | |
296674db | 5442 | else if (min_alignof) |
2793eeab | 5443 | value = size_int (min_align_of_type (type)); |
fa72b064 | 5444 | else |
a4e9ffe5 | 5445 | value = size_int (TYPE_ALIGN_UNIT (type)); |
fa72b064 | 5446 | } |
0213a355 | 5447 | |
3ac8781c RG |
5448 | /* VALUE will have the middle-end integer type sizetype. |
5449 | However, we should really return a value of type `size_t', | |
5450 | which is just a typedef for an ordinary integer type. */ | |
db3927fb | 5451 | value = fold_convert_loc (loc, size_type_node, value); |
35b1a6fa | 5452 | |
fa72b064 | 5453 | return value; |
0213a355 JM |
5454 | } |
5455 | ||
5456 | /* Implement the __alignof keyword: Return the minimum required | |
837edd5f GK |
5457 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
5458 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
c2255bc4 AH |
5459 | from an "aligned" __attribute__ specification). LOC is the |
5460 | location of the ALIGNOF operator. */ | |
7f4edbcb | 5461 | |
0213a355 | 5462 | tree |
c2255bc4 | 5463 | c_alignof_expr (location_t loc, tree expr) |
0213a355 JM |
5464 | { |
5465 | tree t; | |
5466 | ||
837edd5f | 5467 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
a4e9ffe5 | 5468 | t = size_int (DECL_ALIGN_UNIT (expr)); |
35b1a6fa | 5469 | |
0213a355 JM |
5470 | else if (TREE_CODE (expr) == COMPONENT_REF |
5471 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
5472 | { | |
c2255bc4 | 5473 | error_at (loc, "%<__alignof%> applied to a bit-field"); |
0213a355 JM |
5474 | t = size_one_node; |
5475 | } | |
5476 | else if (TREE_CODE (expr) == COMPONENT_REF | |
173bf5be | 5477 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
a4e9ffe5 | 5478 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
35b1a6fa | 5479 | |
22d03525 | 5480 | else if (INDIRECT_REF_P (expr)) |
0213a355 JM |
5481 | { |
5482 | tree t = TREE_OPERAND (expr, 0); | |
5483 | tree best = t; | |
5484 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
35b1a6fa | 5485 | |
1043771b | 5486 | while (CONVERT_EXPR_P (t) |
173bf5be | 5487 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
0213a355 JM |
5488 | { |
5489 | int thisalign; | |
5490 | ||
5491 | t = TREE_OPERAND (t, 0); | |
5492 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
5493 | if (thisalign > bestalign) | |
5494 | best = t, bestalign = thisalign; | |
5495 | } | |
c2255bc4 | 5496 | return c_alignof (loc, TREE_TYPE (TREE_TYPE (best))); |
0213a355 JM |
5497 | } |
5498 | else | |
c2255bc4 | 5499 | return c_alignof (loc, TREE_TYPE (expr)); |
0213a355 | 5500 | |
db3927fb | 5501 | return fold_convert_loc (loc, size_type_node, t); |
0213a355 JM |
5502 | } |
5503 | \f | |
df061a43 RS |
5504 | /* Handle C and C++ default attributes. */ |
5505 | ||
5506 | enum built_in_attribute | |
5507 | { | |
5508 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
5509 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
e384e6b5 | 5510 | #define DEF_ATTR_STRING(ENUM, VALUE) ENUM, |
df061a43 RS |
5511 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, |
5512 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
df061a43 RS |
5513 | #include "builtin-attrs.def" |
5514 | #undef DEF_ATTR_NULL_TREE | |
5515 | #undef DEF_ATTR_INT | |
e384e6b5 | 5516 | #undef DEF_ATTR_STRING |
df061a43 RS |
5517 | #undef DEF_ATTR_IDENT |
5518 | #undef DEF_ATTR_TREE_LIST | |
df061a43 RS |
5519 | ATTR_LAST |
5520 | }; | |
5521 | ||
5522 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
5523 | ||
35b1a6fa | 5524 | static void c_init_attributes (void); |
df061a43 | 5525 | |
a0274e3e | 5526 | enum c_builtin_type |
7f4edbcb | 5527 | { |
10841285 MM |
5528 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
5529 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
5530 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
5531 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
5532 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
5533 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
10a0d495 | 5534 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
f6a7cffc TS |
5535 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5536 | ARG6) NAME, | |
5537 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5538 | ARG6, ARG7) NAME, | |
5539 | #define DEF_FUNCTION_TYPE_8(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5540 | ARG6, ARG7, ARG8) NAME, | |
10841285 MM |
5541 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
5542 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
5543 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
08291658 | 5544 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
10a0d495 | 5545 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
f6a7cffc | 5546 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ |
56a9f6bc TS |
5547 | NAME, |
5548 | #define DEF_FUNCTION_TYPE_VAR_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5549 | ARG6, ARG7) NAME, | |
5550 | #define DEF_FUNCTION_TYPE_VAR_11(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5551 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) NAME, | |
10841285 MM |
5552 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
5553 | #include "builtin-types.def" | |
5554 | #undef DEF_PRIMITIVE_TYPE | |
5555 | #undef DEF_FUNCTION_TYPE_0 | |
5556 | #undef DEF_FUNCTION_TYPE_1 | |
5557 | #undef DEF_FUNCTION_TYPE_2 | |
5558 | #undef DEF_FUNCTION_TYPE_3 | |
5559 | #undef DEF_FUNCTION_TYPE_4 | |
10a0d495 JJ |
5560 | #undef DEF_FUNCTION_TYPE_5 |
5561 | #undef DEF_FUNCTION_TYPE_6 | |
a0274e3e | 5562 | #undef DEF_FUNCTION_TYPE_7 |
acf0174b | 5563 | #undef DEF_FUNCTION_TYPE_8 |
10841285 MM |
5564 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5565 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5566 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
08291658 | 5567 | #undef DEF_FUNCTION_TYPE_VAR_3 |
10a0d495 JJ |
5568 | #undef DEF_FUNCTION_TYPE_VAR_4 |
5569 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
56a9f6bc TS |
5570 | #undef DEF_FUNCTION_TYPE_VAR_7 |
5571 | #undef DEF_FUNCTION_TYPE_VAR_11 | |
10841285 | 5572 | #undef DEF_POINTER_TYPE |
a0274e3e JJ |
5573 | BT_LAST |
5574 | }; | |
5575 | ||
5576 | typedef enum c_builtin_type builtin_type; | |
10841285 | 5577 | |
a0274e3e JJ |
5578 | /* A temporary array for c_common_nodes_and_builtins. Used in |
5579 | communication with def_fn_type. */ | |
5580 | static tree builtin_types[(int) BT_LAST + 1]; | |
10841285 | 5581 | |
a0274e3e JJ |
5582 | /* A helper function for c_common_nodes_and_builtins. Build function type |
5583 | for DEF with return type RET and N arguments. If VAR is true, then the | |
5584 | function should be variadic after those N arguments. | |
5585 | ||
5586 | Takes special care not to ICE if any of the types involved are | |
5587 | error_mark_node, which indicates that said type is not in fact available | |
5588 | (see builtin_type_for_size). In which case the function type as a whole | |
5589 | should be error_mark_node. */ | |
5590 | ||
5591 | static void | |
5592 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
5593 | { | |
8242dd04 NF |
5594 | tree t; |
5595 | tree *args = XALLOCAVEC (tree, n); | |
a0274e3e JJ |
5596 | va_list list; |
5597 | int i; | |
5598 | ||
5599 | va_start (list, n); | |
5600 | for (i = 0; i < n; ++i) | |
5601 | { | |
d75d71e0 | 5602 | builtin_type a = (builtin_type) va_arg (list, int); |
a0274e3e JJ |
5603 | t = builtin_types[a]; |
5604 | if (t == error_mark_node) | |
5605 | goto egress; | |
8242dd04 | 5606 | args[i] = t; |
a0274e3e | 5607 | } |
a0274e3e | 5608 | |
a0274e3e JJ |
5609 | t = builtin_types[ret]; |
5610 | if (t == error_mark_node) | |
5611 | goto egress; | |
8242dd04 NF |
5612 | if (var) |
5613 | t = build_varargs_function_type_array (t, n, args); | |
5614 | else | |
5615 | t = build_function_type_array (t, n, args); | |
a0274e3e JJ |
5616 | |
5617 | egress: | |
5618 | builtin_types[def] = t; | |
0edf1bb2 | 5619 | va_end (list); |
a0274e3e JJ |
5620 | } |
5621 | ||
c6d86fce ILT |
5622 | /* Build builtin functions common to both C and C++ language |
5623 | frontends. */ | |
5624 | ||
5625 | static void | |
5626 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
5627 | { | |
5628 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
5629 | builtin_types[ENUM] = VALUE; | |
5630 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
5631 | def_fn_type (ENUM, RETURN, 0, 0); | |
5632 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
5633 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
5634 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
5635 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
5636 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5637 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
5638 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5639 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
5640 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5641 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
5642 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5643 | ARG6) \ | |
5644 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
5645 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5646 | ARG6, ARG7) \ | |
5647 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
acf0174b JJ |
5648 | #define DEF_FUNCTION_TYPE_8(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5649 | ARG6, ARG7, ARG8) \ | |
5650 | def_fn_type (ENUM, RETURN, 0, 8, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
5651 | ARG7, ARG8); | |
c6d86fce ILT |
5652 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ |
5653 | def_fn_type (ENUM, RETURN, 1, 0); | |
5654 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
5655 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
5656 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
5657 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
5658 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5659 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
5660 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5661 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
5662 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5663 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
56a9f6bc TS |
5664 | #define DEF_FUNCTION_TYPE_VAR_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5665 | ARG6, ARG7) \ | |
5666 | def_fn_type (ENUM, RETURN, 1, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
5667 | #define DEF_FUNCTION_TYPE_VAR_11(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5668 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) \ | |
5669 | def_fn_type (ENUM, RETURN, 1, 11, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
5670 | ARG7, ARG8, ARG9, ARG10, ARG11); | |
c6d86fce ILT |
5671 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ |
5672 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
5673 | ||
5674 | #include "builtin-types.def" | |
5675 | ||
5676 | #undef DEF_PRIMITIVE_TYPE | |
f6a7cffc | 5677 | #undef DEF_FUNCTION_TYPE_0 |
c6d86fce ILT |
5678 | #undef DEF_FUNCTION_TYPE_1 |
5679 | #undef DEF_FUNCTION_TYPE_2 | |
5680 | #undef DEF_FUNCTION_TYPE_3 | |
5681 | #undef DEF_FUNCTION_TYPE_4 | |
5682 | #undef DEF_FUNCTION_TYPE_5 | |
5683 | #undef DEF_FUNCTION_TYPE_6 | |
f6a7cffc TS |
5684 | #undef DEF_FUNCTION_TYPE_7 |
5685 | #undef DEF_FUNCTION_TYPE_8 | |
c6d86fce ILT |
5686 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5687 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5688 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
5689 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
5690 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
5691 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
56a9f6bc TS |
5692 | #undef DEF_FUNCTION_TYPE_VAR_7 |
5693 | #undef DEF_FUNCTION_TYPE_VAR_11 | |
c6d86fce ILT |
5694 | #undef DEF_POINTER_TYPE |
5695 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
5696 | ||
5697 | c_init_attributes (); | |
5698 | ||
5699 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
5700 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
5701 | if (NAME && COND) \ | |
5702 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
5703 | builtin_types[(int) TYPE], \ | |
5704 | builtin_types[(int) LIBTYPE], \ | |
5705 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
5706 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
5707 | #include "builtins.def" | |
5708 | #undef DEF_BUILTIN | |
5709 | ||
8de7ef2a UB |
5710 | targetm.init_builtins (); |
5711 | ||
384c400a | 5712 | build_common_builtin_nodes (); |
939b37da | 5713 | |
b72271b9 | 5714 | if (flag_cilkplus) |
939b37da | 5715 | cilk_init_builtins (); |
c6d86fce ILT |
5716 | } |
5717 | ||
c1b61fca JM |
5718 | /* Like get_identifier, but avoid warnings about null arguments when |
5719 | the argument may be NULL for targets where GCC lacks stdint.h type | |
5720 | information. */ | |
5721 | ||
5722 | static inline tree | |
5723 | c_get_ident (const char *id) | |
5724 | { | |
5725 | return get_identifier (id); | |
5726 | } | |
5727 | ||
a0274e3e JJ |
5728 | /* Build tree nodes and builtin functions common to both C and C++ language |
5729 | frontends. */ | |
5730 | ||
5731 | void | |
5732 | c_common_nodes_and_builtins (void) | |
5733 | { | |
b6baa67d KVH |
5734 | int char16_type_size; |
5735 | int char32_type_size; | |
eaa7c03f JM |
5736 | int wchar_type_size; |
5737 | tree array_domain_type; | |
9f720c3e | 5738 | tree va_list_ref_type_node; |
daf68dd7 | 5739 | tree va_list_arg_type_node; |
78a7c317 | 5740 | int i; |
d3707adb | 5741 | |
1a072294 | 5742 | build_common_tree_nodes (flag_signed_char, flag_short_double); |
fce5dddd | 5743 | |
eaa7c03f | 5744 | /* Define `int' and `char' first so that dbx will output them first. */ |
6496a589 | 5745 | record_builtin_type (RID_INT, NULL, integer_type_node); |
eaa7c03f JM |
5746 | record_builtin_type (RID_CHAR, "char", char_type_node); |
5747 | ||
5748 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
5749 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
5750 | but not C. Are the conditionals here needed? */ | |
37fa72e9 | 5751 | if (c_dialect_cxx ()) |
6496a589 | 5752 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
eaa7c03f JM |
5753 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
5754 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
5755 | record_builtin_type (RID_MAX, "long unsigned int", | |
5756 | long_unsigned_type_node); | |
78a7c317 DD |
5757 | |
5758 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
a6766312 | 5759 | { |
78a7c317 DD |
5760 | char name[25]; |
5761 | ||
5762 | sprintf (name, "__int%d", int_n_data[i].bitsize); | |
17958621 | 5763 | record_builtin_type ((enum rid)(RID_FIRST_INT_N + i), name, |
78a7c317 DD |
5764 | int_n_trees[i].signed_type); |
5765 | sprintf (name, "__int%d unsigned", int_n_data[i].bitsize); | |
17958621 | 5766 | record_builtin_type (RID_MAX, name, int_n_trees[i].unsigned_type); |
a6766312 | 5767 | } |
78a7c317 | 5768 | |
37fa72e9 | 5769 | if (c_dialect_cxx ()) |
eaa7c03f JM |
5770 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
5771 | record_builtin_type (RID_MAX, "long long int", | |
5772 | long_long_integer_type_node); | |
5773 | record_builtin_type (RID_MAX, "long long unsigned int", | |
5774 | long_long_unsigned_type_node); | |
37fa72e9 | 5775 | if (c_dialect_cxx ()) |
eaa7c03f JM |
5776 | record_builtin_type (RID_MAX, "long long unsigned", |
5777 | long_long_unsigned_type_node); | |
5778 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
5779 | record_builtin_type (RID_MAX, "short unsigned int", | |
5780 | short_unsigned_type_node); | |
37fa72e9 | 5781 | if (c_dialect_cxx ()) |
eaa7c03f JM |
5782 | record_builtin_type (RID_MAX, "unsigned short", |
5783 | short_unsigned_type_node); | |
5784 | ||
5785 | /* Define both `signed char' and `unsigned char'. */ | |
5786 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
5787 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
5788 | ||
b0c48229 NB |
5789 | /* These are types that c_common_type_for_size and |
5790 | c_common_type_for_mode use. */ | |
c2255bc4 AH |
5791 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5792 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5793 | intQI_type_node)); |
c2255bc4 AH |
5794 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5795 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5796 | intHI_type_node)); |
c2255bc4 AH |
5797 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5798 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5799 | intSI_type_node)); |
c2255bc4 AH |
5800 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5801 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5802 | intDI_type_node)); |
eaa7c03f | 5803 | #if HOST_BITS_PER_WIDE_INT >= 64 |
78a7c317 DD |
5804 | /* Note that this is different than the __int128 type that's part of |
5805 | the generic __intN support. */ | |
1e1b8649 | 5806 | if (targetm.scalar_mode_supported_p (TImode)) |
c2255bc4 AH |
5807 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5808 | TYPE_DECL, | |
1e1b8649 AP |
5809 | get_identifier ("__int128_t"), |
5810 | intTI_type_node)); | |
eaa7c03f | 5811 | #endif |
c2255bc4 AH |
5812 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5813 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5814 | unsigned_intQI_type_node)); |
c2255bc4 AH |
5815 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5816 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5817 | unsigned_intHI_type_node)); |
c2255bc4 AH |
5818 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5819 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5820 | unsigned_intSI_type_node)); |
c2255bc4 AH |
5821 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5822 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5823 | unsigned_intDI_type_node)); |
eaa7c03f | 5824 | #if HOST_BITS_PER_WIDE_INT >= 64 |
1e1b8649 | 5825 | if (targetm.scalar_mode_supported_p (TImode)) |
c2255bc4 AH |
5826 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5827 | TYPE_DECL, | |
1e1b8649 AP |
5828 | get_identifier ("__uint128_t"), |
5829 | unsigned_intTI_type_node)); | |
eaa7c03f JM |
5830 | #endif |
5831 | ||
5832 | /* Create the widest literal types. */ | |
5833 | widest_integer_literal_type_node | |
5834 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
c2255bc4 AH |
5835 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5836 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5837 | widest_integer_literal_type_node)); |
eaa7c03f JM |
5838 | |
5839 | widest_unsigned_literal_type_node | |
5840 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
c2255bc4 AH |
5841 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5842 | TYPE_DECL, NULL_TREE, | |
ae2bcd98 | 5843 | widest_unsigned_literal_type_node)); |
eaa7c03f | 5844 | |
c9f8536c | 5845 | signed_size_type_node = c_common_signed_type (size_type_node); |
eaa7c03f | 5846 | |
d1c38823 ZD |
5847 | pid_type_node = |
5848 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
5849 | ||
6496a589 KG |
5850 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
5851 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
eaa7c03f JM |
5852 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
5853 | ||
9a8ce21f JG |
5854 | /* Only supported decimal floating point extension if the target |
5855 | actually supports underlying modes. */ | |
b8698a0f | 5856 | if (targetm.scalar_mode_supported_p (SDmode) |
9a8ce21f JG |
5857 | && targetm.scalar_mode_supported_p (DDmode) |
5858 | && targetm.scalar_mode_supported_p (TDmode)) | |
5859 | { | |
5860 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
5861 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
5862 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
5863 | } | |
5864 | ||
ab22c1fa CF |
5865 | if (targetm.fixed_point_supported_p ()) |
5866 | { | |
5867 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
5868 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
5869 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
5870 | record_builtin_type (RID_MAX, "long long _Fract", | |
5871 | long_long_fract_type_node); | |
5872 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
5873 | unsigned_short_fract_type_node); | |
5874 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
5875 | unsigned_fract_type_node); | |
5876 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
5877 | unsigned_long_fract_type_node); | |
5878 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
5879 | unsigned_long_long_fract_type_node); | |
5880 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
5881 | sat_short_fract_type_node); | |
5882 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
5883 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
5884 | sat_long_fract_type_node); | |
5885 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
5886 | sat_long_long_fract_type_node); | |
5887 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
5888 | sat_unsigned_short_fract_type_node); | |
5889 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
5890 | sat_unsigned_fract_type_node); | |
5891 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
5892 | sat_unsigned_long_fract_type_node); | |
5893 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
5894 | sat_unsigned_long_long_fract_type_node); | |
5895 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
5896 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
5897 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
5898 | record_builtin_type (RID_MAX, "long long _Accum", | |
5899 | long_long_accum_type_node); | |
5900 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
5901 | unsigned_short_accum_type_node); | |
5902 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
5903 | unsigned_accum_type_node); | |
5904 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
5905 | unsigned_long_accum_type_node); | |
5906 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
5907 | unsigned_long_long_accum_type_node); | |
5908 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
5909 | sat_short_accum_type_node); | |
5910 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
5911 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
5912 | sat_long_accum_type_node); | |
5913 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
5914 | sat_long_long_accum_type_node); | |
5915 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
5916 | sat_unsigned_short_accum_type_node); | |
5917 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
5918 | sat_unsigned_accum_type_node); | |
5919 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
5920 | sat_unsigned_long_accum_type_node); | |
5921 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
5922 | sat_unsigned_long_long_accum_type_node); | |
5923 | ||
5924 | } | |
5925 | ||
c2255bc4 AH |
5926 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5927 | TYPE_DECL, | |
ae2bcd98 RS |
5928 | get_identifier ("complex int"), |
5929 | complex_integer_type_node)); | |
c2255bc4 AH |
5930 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5931 | TYPE_DECL, | |
ae2bcd98 RS |
5932 | get_identifier ("complex float"), |
5933 | complex_float_type_node)); | |
c2255bc4 AH |
5934 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5935 | TYPE_DECL, | |
ae2bcd98 RS |
5936 | get_identifier ("complex double"), |
5937 | complex_double_type_node)); | |
5938 | lang_hooks.decls.pushdecl | |
c2255bc4 AH |
5939 | (build_decl (UNKNOWN_LOCATION, |
5940 | TYPE_DECL, get_identifier ("complex long double"), | |
43577e6b | 5941 | complex_long_double_type_node)); |
eaa7c03f | 5942 | |
498c0f27 JJ |
5943 | if (c_dialect_cxx ()) |
5944 | /* For C++, make fileptr_type_node a distinct void * type until | |
5945 | FILE type is defined. */ | |
8dd16ecc | 5946 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
498c0f27 | 5947 | |
6496a589 | 5948 | record_builtin_type (RID_VOID, NULL, void_type_node); |
eaa7c03f | 5949 | |
06d40de8 DG |
5950 | /* Set the TYPE_NAME for any variants that were built before |
5951 | record_builtin_type gave names to the built-in types. */ | |
5952 | { | |
5953 | tree void_name = TYPE_NAME (void_type_node); | |
5954 | TYPE_NAME (void_type_node) = NULL_TREE; | |
5955 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
5956 | = void_name; | |
5957 | TYPE_NAME (void_type_node) = void_name; | |
5958 | } | |
5959 | ||
eaa7c03f JM |
5960 | void_list_node = build_void_list_node (); |
5961 | ||
5962 | /* Make a type to be the domain of a few array types | |
5963 | whose domains don't really matter. | |
5964 | 200 is small enough that it always fits in size_t | |
5965 | and large enough that it can hold most function names for the | |
5966 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
5967 | array_domain_type = build_index_type (size_int (200)); | |
5968 | ||
5969 | /* Make a type for arrays of characters. | |
5970 | With luck nothing will ever really depend on the length of this | |
5971 | array type. */ | |
5972 | char_array_type_node | |
5973 | = build_array_type (char_type_node, array_domain_type); | |
5974 | ||
10841285 MM |
5975 | string_type_node = build_pointer_type (char_type_node); |
5976 | const_string_type_node | |
5977 | = build_pointer_type (build_qualified_type | |
5978 | (char_type_node, TYPE_QUAL_CONST)); | |
5979 | ||
eaa7c03f | 5980 | /* This is special for C++ so functions can be overloaded. */ |
a11eba95 | 5981 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
eaa7c03f JM |
5982 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
5983 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
207bf79d | 5984 | underlying_wchar_type_node = wchar_type_node; |
37fa72e9 | 5985 | if (c_dialect_cxx ()) |
eaa7c03f | 5986 | { |
8df83eae | 5987 | if (TYPE_UNSIGNED (wchar_type_node)) |
eaa7c03f JM |
5988 | wchar_type_node = make_unsigned_type (wchar_type_size); |
5989 | else | |
5990 | wchar_type_node = make_signed_type (wchar_type_size); | |
5991 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
5992 | } | |
eaa7c03f JM |
5993 | |
5994 | /* This is for wide string constants. */ | |
5995 | wchar_array_type_node | |
5996 | = build_array_type (wchar_type_node, array_domain_type); | |
5997 | ||
b6baa67d KVH |
5998 | /* Define 'char16_t'. */ |
5999 | char16_type_node = get_identifier (CHAR16_TYPE); | |
6000 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
6001 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
6002 | if (c_dialect_cxx ()) | |
6003 | { | |
6004 | char16_type_node = make_unsigned_type (char16_type_size); | |
6005 | ||
604b2bfc | 6006 | if (cxx_dialect >= cxx11) |
b6baa67d KVH |
6007 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); |
6008 | } | |
6009 | ||
6010 | /* This is for UTF-16 string constants. */ | |
6011 | char16_array_type_node | |
6012 | = build_array_type (char16_type_node, array_domain_type); | |
6013 | ||
6014 | /* Define 'char32_t'. */ | |
6015 | char32_type_node = get_identifier (CHAR32_TYPE); | |
6016 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
6017 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
6018 | if (c_dialect_cxx ()) | |
6019 | { | |
6020 | char32_type_node = make_unsigned_type (char32_type_size); | |
6021 | ||
604b2bfc | 6022 | if (cxx_dialect >= cxx11) |
b6baa67d KVH |
6023 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); |
6024 | } | |
6025 | ||
6026 | /* This is for UTF-32 string constants. */ | |
6027 | char32_array_type_node | |
6028 | = build_array_type (char32_type_node, array_domain_type); | |
6029 | ||
5fd8e536 JM |
6030 | wint_type_node = |
6031 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
6032 | ||
6033 | intmax_type_node = | |
6034 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
6035 | uintmax_type_node = | |
6036 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
6037 | ||
207bf79d JM |
6038 | if (SIG_ATOMIC_TYPE) |
6039 | sig_atomic_type_node = | |
c1b61fca | 6040 | TREE_TYPE (identifier_global_value (c_get_ident (SIG_ATOMIC_TYPE))); |
207bf79d JM |
6041 | if (INT8_TYPE) |
6042 | int8_type_node = | |
c1b61fca | 6043 | TREE_TYPE (identifier_global_value (c_get_ident (INT8_TYPE))); |
207bf79d JM |
6044 | if (INT16_TYPE) |
6045 | int16_type_node = | |
c1b61fca | 6046 | TREE_TYPE (identifier_global_value (c_get_ident (INT16_TYPE))); |
207bf79d JM |
6047 | if (INT32_TYPE) |
6048 | int32_type_node = | |
c1b61fca | 6049 | TREE_TYPE (identifier_global_value (c_get_ident (INT32_TYPE))); |
207bf79d JM |
6050 | if (INT64_TYPE) |
6051 | int64_type_node = | |
c1b61fca | 6052 | TREE_TYPE (identifier_global_value (c_get_ident (INT64_TYPE))); |
207bf79d JM |
6053 | if (UINT8_TYPE) |
6054 | uint8_type_node = | |
c1b61fca | 6055 | TREE_TYPE (identifier_global_value (c_get_ident (UINT8_TYPE))); |
207bf79d | 6056 | if (UINT16_TYPE) |
cca615af | 6057 | c_uint16_type_node = uint16_type_node = |
c1b61fca | 6058 | TREE_TYPE (identifier_global_value (c_get_ident (UINT16_TYPE))); |
207bf79d | 6059 | if (UINT32_TYPE) |
cca615af | 6060 | c_uint32_type_node = uint32_type_node = |
c1b61fca | 6061 | TREE_TYPE (identifier_global_value (c_get_ident (UINT32_TYPE))); |
207bf79d | 6062 | if (UINT64_TYPE) |
cca615af | 6063 | c_uint64_type_node = uint64_type_node = |
c1b61fca | 6064 | TREE_TYPE (identifier_global_value (c_get_ident (UINT64_TYPE))); |
207bf79d JM |
6065 | if (INT_LEAST8_TYPE) |
6066 | int_least8_type_node = | |
c1b61fca | 6067 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST8_TYPE))); |
207bf79d JM |
6068 | if (INT_LEAST16_TYPE) |
6069 | int_least16_type_node = | |
c1b61fca | 6070 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST16_TYPE))); |
207bf79d JM |
6071 | if (INT_LEAST32_TYPE) |
6072 | int_least32_type_node = | |
c1b61fca | 6073 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST32_TYPE))); |
207bf79d JM |
6074 | if (INT_LEAST64_TYPE) |
6075 | int_least64_type_node = | |
c1b61fca | 6076 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST64_TYPE))); |
207bf79d JM |
6077 | if (UINT_LEAST8_TYPE) |
6078 | uint_least8_type_node = | |
c1b61fca | 6079 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST8_TYPE))); |
207bf79d JM |
6080 | if (UINT_LEAST16_TYPE) |
6081 | uint_least16_type_node = | |
c1b61fca | 6082 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST16_TYPE))); |
207bf79d JM |
6083 | if (UINT_LEAST32_TYPE) |
6084 | uint_least32_type_node = | |
c1b61fca | 6085 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST32_TYPE))); |
207bf79d JM |
6086 | if (UINT_LEAST64_TYPE) |
6087 | uint_least64_type_node = | |
c1b61fca | 6088 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST64_TYPE))); |
207bf79d JM |
6089 | if (INT_FAST8_TYPE) |
6090 | int_fast8_type_node = | |
c1b61fca | 6091 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST8_TYPE))); |
207bf79d JM |
6092 | if (INT_FAST16_TYPE) |
6093 | int_fast16_type_node = | |
c1b61fca | 6094 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST16_TYPE))); |
207bf79d JM |
6095 | if (INT_FAST32_TYPE) |
6096 | int_fast32_type_node = | |
c1b61fca | 6097 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST32_TYPE))); |
207bf79d JM |
6098 | if (INT_FAST64_TYPE) |
6099 | int_fast64_type_node = | |
c1b61fca | 6100 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST64_TYPE))); |
207bf79d JM |
6101 | if (UINT_FAST8_TYPE) |
6102 | uint_fast8_type_node = | |
c1b61fca | 6103 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST8_TYPE))); |
207bf79d JM |
6104 | if (UINT_FAST16_TYPE) |
6105 | uint_fast16_type_node = | |
c1b61fca | 6106 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST16_TYPE))); |
207bf79d JM |
6107 | if (UINT_FAST32_TYPE) |
6108 | uint_fast32_type_node = | |
c1b61fca | 6109 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST32_TYPE))); |
207bf79d JM |
6110 | if (UINT_FAST64_TYPE) |
6111 | uint_fast64_type_node = | |
c1b61fca | 6112 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST64_TYPE))); |
207bf79d JM |
6113 | if (INTPTR_TYPE) |
6114 | intptr_type_node = | |
c1b61fca | 6115 | TREE_TYPE (identifier_global_value (c_get_ident (INTPTR_TYPE))); |
207bf79d JM |
6116 | if (UINTPTR_TYPE) |
6117 | uintptr_type_node = | |
c1b61fca | 6118 | TREE_TYPE (identifier_global_value (c_get_ident (UINTPTR_TYPE))); |
207bf79d | 6119 | |
8242dd04 NF |
6120 | default_function_type |
6121 | = build_varargs_function_type_list (integer_type_node, NULL_TREE); | |
5fd8e536 JM |
6122 | ptrdiff_type_node |
6123 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
12753674 | 6124 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
5fd8e536 | 6125 | |
ae2bcd98 | 6126 | lang_hooks.decls.pushdecl |
c2255bc4 AH |
6127 | (build_decl (UNKNOWN_LOCATION, |
6128 | TYPE_DECL, get_identifier ("__builtin_va_list"), | |
43577e6b | 6129 | va_list_type_node)); |
38f8b050 | 6130 | if (targetm.enum_va_list_p) |
d4048208 KT |
6131 | { |
6132 | int l; | |
6133 | const char *pname; | |
6134 | tree ptype; | |
35cbb299 | 6135 | |
38f8b050 | 6136 | for (l = 0; targetm.enum_va_list_p (l, &pname, &ptype); ++l) |
d4048208 KT |
6137 | { |
6138 | lang_hooks.decls.pushdecl | |
6139 | (build_decl (UNKNOWN_LOCATION, | |
6140 | TYPE_DECL, get_identifier (pname), | |
6141 | ptype)); | |
6142 | ||
6143 | } | |
6144 | } | |
daf68dd7 | 6145 | |
daf68dd7 | 6146 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
9f720c3e GK |
6147 | { |
6148 | va_list_arg_type_node = va_list_ref_type_node = | |
6149 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
6150 | } | |
daf68dd7 | 6151 | else |
9f720c3e GK |
6152 | { |
6153 | va_list_arg_type_node = va_list_type_node; | |
6154 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
6155 | } | |
35b1a6fa | 6156 | |
c6d86fce ILT |
6157 | if (!flag_preprocess_only) |
6158 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
4677862a | 6159 | |
5b47282c | 6160 | main_identifier_node = get_identifier ("main"); |
b2f97e4a MM |
6161 | |
6162 | /* Create the built-in __null node. It is important that this is | |
6163 | not shared. */ | |
807e902e | 6164 | null_node = make_int_cst (1, 1); |
b2f97e4a | 6165 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); |
a0274e3e JJ |
6166 | |
6167 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
6168 | memset (builtin_types, 0, sizeof (builtin_types)); | |
7f4edbcb | 6169 | } |
d3707adb | 6170 | |
3b2db49f MM |
6171 | /* The number of named compound-literals generated thus far. */ |
6172 | static GTY(()) int compound_literal_number; | |
6173 | ||
6174 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
6175 | ||
6176 | void | |
6177 | set_compound_literal_name (tree decl) | |
6178 | { | |
6179 | char *name; | |
6180 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
6181 | compound_literal_number); | |
6182 | compound_literal_number++; | |
6183 | DECL_NAME (decl) = get_identifier (name); | |
6184 | } | |
6185 | ||
2fe1d762 TV |
6186 | /* build_va_arg helper function. Return a VA_ARG_EXPR with location LOC, type |
6187 | TYPE and operand OP. */ | |
6188 | ||
6189 | static tree | |
6190 | build_va_arg_1 (location_t loc, tree type, tree op) | |
6191 | { | |
6192 | tree expr = build1 (VA_ARG_EXPR, type, op); | |
6193 | SET_EXPR_LOCATION (expr, loc); | |
6194 | return expr; | |
6195 | } | |
6196 | ||
6197 | /* Return a VA_ARG_EXPR corresponding to a source-level expression | |
6198 | va_arg (EXPR, TYPE) at source location LOC. */ | |
6199 | ||
d3707adb | 6200 | tree |
c2255bc4 | 6201 | build_va_arg (location_t loc, tree expr, tree type) |
d3707adb | 6202 | { |
c7b38fd5 TV |
6203 | tree va_type = TREE_TYPE (expr); |
6204 | tree canon_va_type = (va_type == error_mark_node | |
6205 | ? NULL_TREE | |
6206 | : targetm.canonical_va_list_type (va_type)); | |
6207 | ||
2fe1d762 TV |
6208 | if (va_type == error_mark_node |
6209 | || canon_va_type == NULL_TREE) | |
c7b38fd5 | 6210 | { |
2fe1d762 TV |
6211 | /* Let's handle things neutrallly, if expr: |
6212 | - has undeclared type, or | |
6213 | - is not an va_list type. */ | |
6214 | return build_va_arg_1 (loc, type, expr); | |
c7b38fd5 | 6215 | } |
ecd0e562 | 6216 | |
2fe1d762 TV |
6217 | if (TREE_CODE (canon_va_type) != ARRAY_TYPE) |
6218 | { | |
6219 | /* Case 1: Not an array type. */ | |
6220 | ||
6221 | /* Take the address, to get '&ap'. */ | |
6222 | mark_addressable (expr); | |
6223 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (expr)), expr); | |
6224 | ||
6225 | /* Verify that &ap is still recognized as having va_list type. */ | |
6226 | tree canon_expr_type | |
6227 | = targetm.canonical_va_list_type (TREE_TYPE (expr)); | |
6228 | gcc_assert (canon_expr_type != NULL_TREE); | |
6229 | ||
6230 | return build_va_arg_1 (loc, type, expr); | |
6231 | } | |
6232 | ||
6233 | /* Case 2: Array type. | |
6234 | ||
6235 | Background: | |
6236 | ||
6237 | For contrast, let's start with the simple case (case 1). If | |
6238 | canon_va_type is not an array type, but say a char *, then when | |
6239 | passing-by-value a va_list, the type of the va_list param decl is | |
6240 | the same as for another va_list decl (all ap's are char *): | |
6241 | ||
6242 | f2_1 (char * ap) | |
6243 | D.1815 = VA_ARG (&ap, 0B, 1); | |
6244 | return D.1815; | |
6245 | ||
6246 | f2 (int i) | |
6247 | char * ap.0; | |
6248 | char * ap; | |
6249 | __builtin_va_start (&ap, 0); | |
6250 | ap.0 = ap; | |
6251 | res = f2_1 (ap.0); | |
6252 | __builtin_va_end (&ap); | |
6253 | D.1812 = res; | |
6254 | return D.1812; | |
6255 | ||
6256 | However, if canon_va_type is ARRAY_TYPE, then when passing-by-value a | |
6257 | va_list the type of the va_list param decl (case 2b, struct * ap) is not | |
6258 | the same as for another va_list decl (case 2a, struct ap[1]). | |
6259 | ||
6260 | f2_1 (struct * ap) | |
6261 | D.1844 = VA_ARG (ap, 0B, 0); | |
6262 | return D.1844; | |
6263 | ||
6264 | f2 (int i) | |
6265 | struct ap[1]; | |
6266 | __builtin_va_start (&ap, 0); | |
6267 | res = f2_1 (&ap); | |
6268 | __builtin_va_end (&ap); | |
6269 | D.1841 = res; | |
6270 | return D.1841; | |
6271 | ||
6272 | Case 2b is different because: | |
6273 | - on the callee side, the parm decl has declared type va_list, but | |
6274 | grokdeclarator changes the type of the parm decl to a pointer to the | |
6275 | array elem type. | |
6276 | - on the caller side, the pass-by-value uses &ap. | |
6277 | ||
6278 | We unify these two cases (case 2a: va_list is array type, | |
6279 | case 2b: va_list is pointer to array elem type), by adding '&' for the | |
6280 | array type case, such that we have a pointer to array elem in both | |
6281 | cases. */ | |
6282 | ||
6283 | if (TREE_CODE (va_type) == ARRAY_TYPE) | |
6284 | { | |
6285 | /* Case 2a: va_list is array type. */ | |
6286 | ||
6287 | /* Take the address, to get '&ap'. Make sure it's a pointer to array | |
6288 | elem type. */ | |
6289 | mark_addressable (expr); | |
6290 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (canon_va_type)), | |
6291 | expr); | |
6292 | ||
6293 | /* Verify that &ap is still recognized as having va_list type. */ | |
6294 | tree canon_expr_type | |
6295 | = targetm.canonical_va_list_type (TREE_TYPE (expr)); | |
6296 | gcc_assert (canon_expr_type != NULL_TREE); | |
6297 | } | |
6298 | else | |
6299 | { | |
6300 | /* Case 2b: va_list is pointer to array elem type. */ | |
6301 | gcc_assert (POINTER_TYPE_P (va_type)); | |
6302 | gcc_assert (TREE_TYPE (va_type) == TREE_TYPE (canon_va_type)); | |
6303 | ||
6304 | /* Don't take the address. We've already got '&ap'. */ | |
6305 | ; | |
6306 | } | |
6307 | ||
6308 | return build_va_arg_1 (loc, type, expr); | |
d3707adb | 6309 | } |
fc2aaf30 JM |
6310 | |
6311 | ||
7d14c755 JM |
6312 | /* Linked list of disabled built-in functions. */ |
6313 | ||
a79683d5 | 6314 | struct disabled_builtin |
7d14c755 JM |
6315 | { |
6316 | const char *name; | |
6317 | struct disabled_builtin *next; | |
a79683d5 | 6318 | }; |
7d14c755 JM |
6319 | static disabled_builtin *disabled_builtins = NULL; |
6320 | ||
35b1a6fa | 6321 | static bool builtin_function_disabled_p (const char *); |
7d14c755 JM |
6322 | |
6323 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
6324 | begins with "__builtin_", give an error. */ | |
6325 | ||
6326 | void | |
35b1a6fa | 6327 | disable_builtin_function (const char *name) |
7d14c755 JM |
6328 | { |
6329 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
bda67431 | 6330 | error ("cannot disable built-in function %qs", name); |
7d14c755 JM |
6331 | else |
6332 | { | |
1ad463f4 BI |
6333 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
6334 | new_disabled_builtin->name = name; | |
6335 | new_disabled_builtin->next = disabled_builtins; | |
6336 | disabled_builtins = new_disabled_builtin; | |
7d14c755 JM |
6337 | } |
6338 | } | |
6339 | ||
6340 | ||
6341 | /* Return true if the built-in function NAME has been disabled, false | |
6342 | otherwise. */ | |
6343 | ||
6344 | static bool | |
35b1a6fa | 6345 | builtin_function_disabled_p (const char *name) |
7d14c755 JM |
6346 | { |
6347 | disabled_builtin *p; | |
6348 | for (p = disabled_builtins; p != NULL; p = p->next) | |
6349 | { | |
6350 | if (strcmp (name, p->name) == 0) | |
6351 | return true; | |
6352 | } | |
6353 | return false; | |
6354 | } | |
6355 | ||
6356 | ||
9bc15050 RG |
6357 | /* Worker for DEF_BUILTIN. |
6358 | Possibly define a builtin function with one or two names. | |
6359 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
6360 | nonansi_p and flag_no_nonansi_builtin. */ | |
fc2aaf30 | 6361 | |
9bc15050 RG |
6362 | static void |
6363 | def_builtin_1 (enum built_in_function fncode, | |
6364 | const char *name, | |
6365 | enum built_in_class fnclass, | |
6366 | tree fntype, tree libtype, | |
6367 | bool both_p, bool fallback_p, bool nonansi_p, | |
6368 | tree fnattrs, bool implicit_p) | |
fc2aaf30 | 6369 | { |
9bc15050 RG |
6370 | tree decl; |
6371 | const char *libname; | |
6372 | ||
a0274e3e JJ |
6373 | if (fntype == error_mark_node) |
6374 | return; | |
6375 | ||
9bc15050 RG |
6376 | gcc_assert ((!both_p && !fallback_p) |
6377 | || !strncmp (name, "__builtin_", | |
6378 | strlen ("__builtin_"))); | |
6379 | ||
6380 | libname = name + strlen ("__builtin_"); | |
c79efc4d RÁE |
6381 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
6382 | (fallback_p ? libname : NULL), | |
6383 | fnattrs); | |
e79983f4 MM |
6384 | |
6385 | set_builtin_decl (fncode, decl, implicit_p); | |
6386 | ||
9bc15050 RG |
6387 | if (both_p |
6388 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
7d14c755 | 6389 | && !(nonansi_p && flag_no_nonansi_builtin)) |
c79efc4d RÁE |
6390 | add_builtin_function (libname, libtype, fncode, fnclass, |
6391 | NULL, fnattrs); | |
fc2aaf30 | 6392 | } |
c530479e | 6393 | \f |
d72040f5 RH |
6394 | /* Nonzero if the type T promotes to int. This is (nearly) the |
6395 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
6396 | ||
6397 | bool | |
58f9752a | 6398 | c_promoting_integer_type_p (const_tree t) |
d72040f5 RH |
6399 | { |
6400 | switch (TREE_CODE (t)) | |
6401 | { | |
6402 | case INTEGER_TYPE: | |
6403 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
6404 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
6405 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
6406 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
c6c04fca RL |
6407 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
6408 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d72040f5 RH |
6409 | |
6410 | case ENUMERAL_TYPE: | |
6411 | /* ??? Technically all enumerations not larger than an int | |
6412 | promote to an int. But this is used along code paths | |
6413 | that only want to notice a size change. */ | |
6414 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
6415 | ||
6416 | case BOOLEAN_TYPE: | |
6417 | return 1; | |
6418 | ||
6419 | default: | |
6420 | return 0; | |
6421 | } | |
6422 | } | |
6423 | ||
c530479e RH |
6424 | /* Return 1 if PARMS specifies a fixed number of parameters |
6425 | and none of their types is affected by default promotions. */ | |
6426 | ||
6427 | int | |
58f9752a | 6428 | self_promoting_args_p (const_tree parms) |
c530479e | 6429 | { |
58f9752a | 6430 | const_tree t; |
c530479e RH |
6431 | for (t = parms; t; t = TREE_CHAIN (t)) |
6432 | { | |
b3694847 | 6433 | tree type = TREE_VALUE (t); |
7e8176d7 | 6434 | |
694fea20 VR |
6435 | if (type == error_mark_node) |
6436 | continue; | |
6437 | ||
c530479e RH |
6438 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
6439 | return 0; | |
6440 | ||
6441 | if (type == 0) | |
6442 | return 0; | |
6443 | ||
6444 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
6445 | return 0; | |
6446 | ||
d72040f5 | 6447 | if (c_promoting_integer_type_p (type)) |
c530479e RH |
6448 | return 0; |
6449 | } | |
6450 | return 1; | |
6451 | } | |
5eda3d66 | 6452 | |
12ea3302 GDR |
6453 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
6454 | tree | |
6455 | strip_pointer_operator (tree t) | |
6456 | { | |
6457 | while (POINTER_TYPE_P (t)) | |
6458 | t = TREE_TYPE (t); | |
6459 | return t; | |
6460 | } | |
6461 | ||
ba992967 SP |
6462 | /* Recursively remove pointer or array type from TYPE. */ |
6463 | tree | |
6464 | strip_pointer_or_array_types (tree t) | |
6465 | { | |
6466 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
6467 | t = TREE_TYPE (t); | |
6468 | return t; | |
6469 | } | |
6470 | ||
8f17b5c5 MM |
6471 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
6472 | representing case labels, or NULL_TREE for a `default' label. | |
6473 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
6474 | K2, and 0 if K1 and K2 are equal. */ | |
6475 | ||
6476 | int | |
35b1a6fa | 6477 | case_compare (splay_tree_key k1, splay_tree_key k2) |
8f17b5c5 MM |
6478 | { |
6479 | /* Consider a NULL key (such as arises with a `default' label) to be | |
6480 | smaller than anything else. */ | |
6481 | if (!k1) | |
6482 | return k2 ? -1 : 0; | |
6483 | else if (!k2) | |
6484 | return k1 ? 1 : 0; | |
6485 | ||
6486 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
6487 | } | |
6488 | ||
c2255bc4 AH |
6489 | /* Process a case label, located at LOC, for the range LOW_VALUE |
6490 | ... HIGH_VALUE. If LOW_VALUE and HIGH_VALUE are both NULL_TREE | |
6491 | then this case label is actually a `default' label. If only | |
6492 | HIGH_VALUE is NULL_TREE, then case label was declared using the | |
6493 | usual C/C++ syntax, rather than the GNU case range extension. | |
6494 | CASES is a tree containing all the case ranges processed so far; | |
b155cfd9 MP |
6495 | COND is the condition for the switch-statement itself. |
6496 | OUTSIDE_RANGE_P says whether there was a case value that doesn't | |
6497 | fit into the range of the ORIG_TYPE. Returns the CASE_LABEL_EXPR | |
6498 | created, or ERROR_MARK_NODE if no CASE_LABEL_EXPR is created. */ | |
8f17b5c5 MM |
6499 | |
6500 | tree | |
c2255bc4 | 6501 | c_add_case_label (location_t loc, splay_tree cases, tree cond, tree orig_type, |
b155cfd9 | 6502 | tree low_value, tree high_value, bool *outside_range_p) |
8f17b5c5 MM |
6503 | { |
6504 | tree type; | |
6505 | tree label; | |
6506 | tree case_label; | |
6507 | splay_tree_node node; | |
6508 | ||
6509 | /* Create the LABEL_DECL itself. */ | |
c2255bc4 | 6510 | label = create_artificial_label (loc); |
8f17b5c5 MM |
6511 | |
6512 | /* If there was an error processing the switch condition, bail now | |
6513 | before we get more confused. */ | |
6514 | if (!cond || cond == error_mark_node) | |
6de9cd9a | 6515 | goto error_out; |
8f17b5c5 | 6516 | |
35b1a6fa AJ |
6517 | if ((low_value && TREE_TYPE (low_value) |
6518 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
8f17b5c5 MM |
6519 | || (high_value && TREE_TYPE (high_value) |
6520 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
522ddfa2 | 6521 | { |
c2255bc4 | 6522 | error_at (loc, "pointers are not permitted as case values"); |
522ddfa2 JM |
6523 | goto error_out; |
6524 | } | |
8f17b5c5 MM |
6525 | |
6526 | /* Case ranges are a GNU extension. */ | |
fcf73884 | 6527 | if (high_value) |
c1771a20 | 6528 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 6529 | "range expressions in switch statements are non-standard"); |
8f17b5c5 MM |
6530 | |
6531 | type = TREE_TYPE (cond); | |
6532 | if (low_value) | |
6533 | { | |
62e4eb35 | 6534 | low_value = check_case_value (loc, low_value); |
68fca595 | 6535 | low_value = convert_and_check (loc, type, low_value); |
c0e22534 NS |
6536 | if (low_value == error_mark_node) |
6537 | goto error_out; | |
8f17b5c5 MM |
6538 | } |
6539 | if (high_value) | |
6540 | { | |
62e4eb35 | 6541 | high_value = check_case_value (loc, high_value); |
68fca595 | 6542 | high_value = convert_and_check (loc, type, high_value); |
c0e22534 NS |
6543 | if (high_value == error_mark_node) |
6544 | goto error_out; | |
8f17b5c5 MM |
6545 | } |
6546 | ||
c0e22534 NS |
6547 | if (low_value && high_value) |
6548 | { | |
6549 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
c22cacf3 MS |
6550 | really a case range, even though it was written that way. |
6551 | Remove the HIGH_VALUE to simplify later processing. */ | |
c0e22534 NS |
6552 | if (tree_int_cst_equal (low_value, high_value)) |
6553 | high_value = NULL_TREE; | |
6554 | else if (!tree_int_cst_lt (low_value, high_value)) | |
c2255bc4 | 6555 | warning_at (loc, 0, "empty range specified"); |
c0e22534 | 6556 | } |
8f17b5c5 | 6557 | |
a6c0a76c SB |
6558 | /* See if the case is in range of the type of the original testing |
6559 | expression. If both low_value and high_value are out of range, | |
6560 | don't insert the case label and return NULL_TREE. */ | |
6561 | if (low_value | |
9d548dfb | 6562 | && !check_case_bounds (loc, type, orig_type, |
b155cfd9 MP |
6563 | &low_value, high_value ? &high_value : NULL, |
6564 | outside_range_p)) | |
a6c0a76c SB |
6565 | return NULL_TREE; |
6566 | ||
8f17b5c5 MM |
6567 | /* Look up the LOW_VALUE in the table of case labels we already |
6568 | have. */ | |
6569 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
6570 | /* If there was not an exact match, check for overlapping ranges. | |
6571 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
6572 | that's a `default' label and the only overlap is an exact match. */ | |
6573 | if (!node && (low_value || high_value)) | |
6574 | { | |
6575 | splay_tree_node low_bound; | |
6576 | splay_tree_node high_bound; | |
6577 | ||
6578 | /* Even though there wasn't an exact match, there might be an | |
6579 | overlap between this case range and another case range. | |
6580 | Since we've (inductively) not allowed any overlapping case | |
6581 | ranges, we simply need to find the greatest low case label | |
6582 | that is smaller that LOW_VALUE, and the smallest low case | |
6583 | label that is greater than LOW_VALUE. If there is an overlap | |
6584 | it will occur in one of these two ranges. */ | |
6585 | low_bound = splay_tree_predecessor (cases, | |
6586 | (splay_tree_key) low_value); | |
6587 | high_bound = splay_tree_successor (cases, | |
6588 | (splay_tree_key) low_value); | |
6589 | ||
6590 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
6591 | the LOW_VALUE, so there is no need to check unless the | |
6592 | LOW_BOUND is in fact itself a case range. */ | |
6593 | if (low_bound | |
6594 | && CASE_HIGH ((tree) low_bound->value) | |
6595 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
6596 | low_value) >= 0) | |
6597 | node = low_bound; | |
6598 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
6599 | range is bigger than the low end of the current range, so we | |
6600 | are only interested if the current range is a real range, and | |
6601 | not an ordinary case label. */ | |
35b1a6fa | 6602 | else if (high_bound |
8f17b5c5 MM |
6603 | && high_value |
6604 | && (tree_int_cst_compare ((tree) high_bound->key, | |
6605 | high_value) | |
6606 | <= 0)) | |
6607 | node = high_bound; | |
6608 | } | |
6609 | /* If there was an overlap, issue an error. */ | |
6610 | if (node) | |
6611 | { | |
8c161995 | 6612 | tree duplicate = CASE_LABEL ((tree) node->value); |
8f17b5c5 MM |
6613 | |
6614 | if (high_value) | |
6615 | { | |
c2255bc4 AH |
6616 | error_at (loc, "duplicate (or overlapping) case value"); |
6617 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6618 | "this is the first entry overlapping that value"); | |
8f17b5c5 MM |
6619 | } |
6620 | else if (low_value) | |
6621 | { | |
c2255bc4 AH |
6622 | error_at (loc, "duplicate case value") ; |
6623 | error_at (DECL_SOURCE_LOCATION (duplicate), "previously used here"); | |
8f17b5c5 MM |
6624 | } |
6625 | else | |
6626 | { | |
c2255bc4 AH |
6627 | error_at (loc, "multiple default labels in one switch"); |
6628 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6629 | "this is the first default label"); | |
8f17b5c5 | 6630 | } |
6de9cd9a | 6631 | goto error_out; |
8f17b5c5 MM |
6632 | } |
6633 | ||
6634 | /* Add a CASE_LABEL to the statement-tree. */ | |
3d528853 | 6635 | case_label = add_stmt (build_case_label (low_value, high_value, label)); |
8f17b5c5 | 6636 | /* Register this case label in the splay tree. */ |
35b1a6fa | 6637 | splay_tree_insert (cases, |
8f17b5c5 MM |
6638 | (splay_tree_key) low_value, |
6639 | (splay_tree_value) case_label); | |
6640 | ||
6641 | return case_label; | |
6de9cd9a DN |
6642 | |
6643 | error_out: | |
9e14e18f | 6644 | /* Add a label so that the back-end doesn't think that the beginning of |
6de9cd9a | 6645 | the switch is unreachable. Note that we do not add a case label, as |
41806d92 | 6646 | that just leads to duplicates and thence to failure later on. */ |
6de9cd9a DN |
6647 | if (!cases->root) |
6648 | { | |
c2255bc4 AH |
6649 | tree t = create_artificial_label (loc); |
6650 | add_stmt (build_stmt (loc, LABEL_EXPR, t)); | |
6de9cd9a DN |
6651 | } |
6652 | return error_mark_node; | |
6653 | } | |
6654 | ||
6655 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
6656 | Used to verify that case values match up with enumerator values. */ | |
6657 | ||
6658 | static void | |
6659 | match_case_to_enum_1 (tree key, tree type, tree label) | |
6660 | { | |
807e902e KZ |
6661 | char buf[WIDE_INT_PRINT_BUFFER_SIZE]; |
6662 | ||
6663 | if (tree_fits_uhwi_p (key)) | |
6664 | print_dec (key, buf, UNSIGNED); | |
6665 | else if (tree_fits_shwi_p (key)) | |
6666 | print_dec (key, buf, SIGNED); | |
6de9cd9a | 6667 | else |
807e902e | 6668 | print_hex (key, buf); |
6de9cd9a DN |
6669 | |
6670 | if (TYPE_NAME (type) == 0) | |
c5d75364 MLI |
6671 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6672 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6673 | "case value %qs not in enumerated type", | |
6674 | buf); | |
6de9cd9a | 6675 | else |
c5d75364 MLI |
6676 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6677 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6678 | "case value %qs not in enumerated type %qT", | |
6679 | buf, type); | |
6de9cd9a DN |
6680 | } |
6681 | ||
c782c2fe RS |
6682 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
6683 | Used to verify that case values match up with enumerator values. */ | |
6684 | ||
6de9cd9a DN |
6685 | static int |
6686 | match_case_to_enum (splay_tree_node node, void *data) | |
6687 | { | |
6688 | tree label = (tree) node->value; | |
28dab132 | 6689 | tree type = (tree) data; |
6de9cd9a DN |
6690 | |
6691 | /* Skip default case. */ | |
6692 | if (!CASE_LOW (label)) | |
6693 | return 0; | |
6694 | ||
c782c2fe | 6695 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
6de9cd9a | 6696 | when we did our enum->case scan. Reset our scratch bit after. */ |
c782c2fe | 6697 | if (!CASE_LOW_SEEN (label)) |
6de9cd9a DN |
6698 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
6699 | else | |
c782c2fe | 6700 | CASE_LOW_SEEN (label) = 0; |
6de9cd9a | 6701 | |
c782c2fe RS |
6702 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
6703 | not set, that means that CASE_HIGH did not appear when we did our | |
6704 | enum->case scan. Reset our scratch bit after. */ | |
6de9cd9a DN |
6705 | if (CASE_HIGH (label)) |
6706 | { | |
c782c2fe RS |
6707 | if (!CASE_HIGH_SEEN (label)) |
6708 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
6709 | else | |
6710 | CASE_HIGH_SEEN (label) = 0; | |
6de9cd9a DN |
6711 | } |
6712 | ||
6713 | return 0; | |
6714 | } | |
6715 | ||
fbc315db ILT |
6716 | /* Handle -Wswitch*. Called from the front end after parsing the |
6717 | switch construct. */ | |
6718 | /* ??? Should probably be somewhere generic, since other languages | |
6719 | besides C and C++ would want this. At the moment, however, C/C++ | |
6720 | are the only tree-ssa languages that support enumerations at all, | |
6721 | so the point is moot. */ | |
6de9cd9a | 6722 | |
fbc315db ILT |
6723 | void |
6724 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
b155cfd9 MP |
6725 | tree type, tree cond, bool bool_cond_p, |
6726 | bool outside_range_p) | |
6de9cd9a | 6727 | { |
9f63daea | 6728 | splay_tree_node default_node; |
c782c2fe RS |
6729 | splay_tree_node node; |
6730 | tree chain; | |
6de9cd9a | 6731 | |
b155cfd9 MP |
6732 | if (!warn_switch && !warn_switch_enum && !warn_switch_default |
6733 | && !warn_switch_bool) | |
6de9cd9a DN |
6734 | return; |
6735 | ||
6de9cd9a | 6736 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
44c21c7f | 6737 | if (!default_node) |
fab922b1 MLI |
6738 | warning_at (switch_location, OPT_Wswitch_default, |
6739 | "switch missing default case"); | |
6de9cd9a | 6740 | |
b155cfd9 MP |
6741 | /* There are certain cases where -Wswitch-bool warnings aren't |
6742 | desirable, such as | |
6743 | switch (boolean) | |
6744 | { | |
6745 | case true: ... | |
6746 | case false: ... | |
6747 | } | |
6748 | so be careful here. */ | |
6749 | if (warn_switch_bool && bool_cond_p) | |
6750 | { | |
6751 | splay_tree_node min_node; | |
6752 | /* If there's a default node, it's also the value with the minimal | |
6753 | key. So look at the penultimate key (if any). */ | |
6754 | if (default_node) | |
6755 | min_node = splay_tree_successor (cases, (splay_tree_key) NULL); | |
6756 | else | |
6757 | min_node = splay_tree_min (cases); | |
6758 | tree min = min_node ? (tree) min_node->key : NULL_TREE; | |
6759 | ||
6760 | splay_tree_node max_node = splay_tree_max (cases); | |
6761 | /* This might be a case range, so look at the value with the | |
6762 | maximal key and then check CASE_HIGH. */ | |
6763 | tree max = max_node ? (tree) max_node->value : NULL_TREE; | |
6764 | if (max) | |
6765 | max = CASE_HIGH (max) ? CASE_HIGH (max) : CASE_LOW (max); | |
6766 | ||
6767 | /* If there's a case value > 1 or < 0, that is outside bool | |
6768 | range, warn. */ | |
6769 | if (outside_range_p | |
6770 | || (max && wi::gts_p (max, 1)) | |
6771 | || (min && wi::lts_p (min, 0)) | |
6772 | /* And handle the | |
6773 | switch (boolean) | |
6774 | { | |
6775 | case true: ... | |
6776 | case false: ... | |
6777 | default: ... | |
6778 | } | |
6779 | case, where we want to warn. */ | |
6780 | || (default_node | |
6781 | && max && wi::eq_p (max, 1) | |
6782 | && min && wi::eq_p (min, 0))) | |
6783 | warning_at (switch_location, OPT_Wswitch_bool, | |
6784 | "switch condition has boolean value"); | |
6785 | } | |
6786 | ||
026c3cfd | 6787 | /* From here on, we only care about enumerated types. */ |
c782c2fe RS |
6788 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) |
6789 | return; | |
6790 | ||
cdb88468 ILT |
6791 | /* From here on, we only care about -Wswitch and -Wswitch-enum. */ |
6792 | if (!warn_switch_enum && !warn_switch) | |
c782c2fe RS |
6793 | return; |
6794 | ||
cdb88468 ILT |
6795 | /* Check the cases. Warn about case values which are not members of |
6796 | the enumerated type. For -Wswitch-enum, or for -Wswitch when | |
6797 | there is no default case, check that exactly all enumeration | |
6798 | literals are covered by the cases. */ | |
6799 | ||
c782c2fe RS |
6800 | /* Clearing COND if it is not an integer constant simplifies |
6801 | the tests inside the loop below. */ | |
6802 | if (TREE_CODE (cond) != INTEGER_CST) | |
6803 | cond = NULL_TREE; | |
6804 | ||
6805 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
6806 | common case of monotonically increasing enumerators, it is | |
6807 | O(N), since the nature of the splay tree will keep the next | |
6808 | element adjacent to the root at all times. */ | |
6de9cd9a | 6809 | |
c782c2fe RS |
6810 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
6811 | { | |
6812 | tree value = TREE_VALUE (chain); | |
adf2edec DG |
6813 | if (TREE_CODE (value) == CONST_DECL) |
6814 | value = DECL_INITIAL (value); | |
c782c2fe RS |
6815 | node = splay_tree_lookup (cases, (splay_tree_key) value); |
6816 | if (node) | |
6de9cd9a | 6817 | { |
c782c2fe RS |
6818 | /* Mark the CASE_LOW part of the case entry as seen. */ |
6819 | tree label = (tree) node->value; | |
6820 | CASE_LOW_SEEN (label) = 1; | |
6821 | continue; | |
6822 | } | |
6823 | ||
6824 | /* Even though there wasn't an exact match, there might be a | |
fa10beec | 6825 | case range which includes the enumerator's value. */ |
c782c2fe RS |
6826 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
6827 | if (node && CASE_HIGH ((tree) node->value)) | |
6828 | { | |
6829 | tree label = (tree) node->value; | |
6830 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
6831 | if (cmp >= 0) | |
6de9cd9a | 6832 | { |
c782c2fe RS |
6833 | /* If we match the upper bound exactly, mark the CASE_HIGH |
6834 | part of the case entry as seen. */ | |
6835 | if (cmp == 0) | |
6836 | CASE_HIGH_SEEN (label) = 1; | |
6837 | continue; | |
6de9cd9a DN |
6838 | } |
6839 | } | |
6840 | ||
c782c2fe RS |
6841 | /* We've now determined that this enumerated literal isn't |
6842 | handled by the case labels of the switch statement. */ | |
6de9cd9a | 6843 | |
c782c2fe RS |
6844 | /* If the switch expression is a constant, we only really care |
6845 | about whether that constant is handled by the switch. */ | |
6846 | if (cond && tree_int_cst_compare (cond, value)) | |
6847 | continue; | |
6de9cd9a | 6848 | |
683d6ff9 | 6849 | /* If there is a default_node, the only relevant option is |
cdb88468 | 6850 | Wswitch-enum. Otherwise, if both are enabled then we prefer |
683d6ff9 MLI |
6851 | to warn using -Wswitch because -Wswitch is enabled by -Wall |
6852 | while -Wswitch-enum is explicit. */ | |
cdb88468 ILT |
6853 | warning_at (switch_location, |
6854 | (default_node || !warn_switch | |
6855 | ? OPT_Wswitch_enum | |
6856 | : OPT_Wswitch), | |
6857 | "enumeration value %qE not handled in switch", | |
6858 | TREE_PURPOSE (chain)); | |
6de9cd9a | 6859 | } |
c782c2fe RS |
6860 | |
6861 | /* Warn if there are case expressions that don't correspond to | |
6862 | enumerators. This can occur since C and C++ don't enforce | |
6863 | type-checking of assignments to enumeration variables. | |
6864 | ||
6865 | The time complexity here is now always O(N) worst case, since | |
6866 | we should have marked both the lower bound and upper bound of | |
6867 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
6868 | above. This scan also resets those fields. */ | |
683d6ff9 | 6869 | |
c782c2fe | 6870 | splay_tree_foreach (cases, match_case_to_enum, type); |
8f17b5c5 MM |
6871 | } |
6872 | ||
6b665219 | 6873 | /* Finish an expression taking the address of LABEL (an |
6a3799eb AH |
6874 | IDENTIFIER_NODE). Returns an expression for the address. |
6875 | ||
6876 | LOC is the location for the expression returned. */ | |
15b732b2 | 6877 | |
35b1a6fa | 6878 | tree |
6a3799eb | 6879 | finish_label_address_expr (tree label, location_t loc) |
15b732b2 NB |
6880 | { |
6881 | tree result; | |
6882 | ||
c1771a20 | 6883 | pedwarn (input_location, OPT_Wpedantic, "taking the address of a label is non-standard"); |
15b732b2 | 6884 | |
6b665219 MM |
6885 | if (label == error_mark_node) |
6886 | return error_mark_node; | |
6887 | ||
15b732b2 NB |
6888 | label = lookup_label (label); |
6889 | if (label == NULL_TREE) | |
6890 | result = null_pointer_node; | |
6891 | else | |
6892 | { | |
6893 | TREE_USED (label) = 1; | |
6894 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
5805e48d | 6895 | /* The current function is not necessarily uninlinable. |
15b732b2 NB |
6896 | Computed gotos are incompatible with inlining, but the value |
6897 | here could be used only in a diagnostic, for example. */ | |
6a3799eb | 6898 | protected_set_expr_location (result, loc); |
15b732b2 NB |
6899 | } |
6900 | ||
6901 | return result; | |
6902 | } | |
19552aa5 JM |
6903 | \f |
6904 | ||
6905 | /* Given a boolean expression ARG, return a tree representing an increment | |
6906 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
6907 | invalid cases (e.g., decrement in C++). */ | |
6908 | tree | |
35b1a6fa | 6909 | boolean_increment (enum tree_code code, tree arg) |
19552aa5 JM |
6910 | { |
6911 | tree val; | |
b5119fa1 | 6912 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
37fa72e9 | 6913 | |
19552aa5 JM |
6914 | arg = stabilize_reference (arg); |
6915 | switch (code) | |
6916 | { | |
6917 | case PREINCREMENT_EXPR: | |
53fb4de3 | 6918 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 JM |
6919 | break; |
6920 | case POSTINCREMENT_EXPR: | |
53fb4de3 | 6921 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 | 6922 | arg = save_expr (arg); |
53fb4de3 RS |
6923 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6924 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
6925 | break; |
6926 | case PREDECREMENT_EXPR: | |
53fb4de3 | 6927 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
db3927fb | 6928 | invert_truthvalue_loc (input_location, arg)); |
19552aa5 JM |
6929 | break; |
6930 | case POSTDECREMENT_EXPR: | |
53fb4de3 | 6931 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
db3927fb | 6932 | invert_truthvalue_loc (input_location, arg)); |
19552aa5 | 6933 | arg = save_expr (arg); |
53fb4de3 RS |
6934 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6935 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
6936 | break; |
6937 | default: | |
366de0ce | 6938 | gcc_unreachable (); |
19552aa5 JM |
6939 | } |
6940 | TREE_SIDE_EFFECTS (val) = 1; | |
6941 | return val; | |
6942 | } | |
03dc0325 | 6943 | \f |
207bf79d JM |
6944 | /* Built-in macros for stddef.h and stdint.h, that require macros |
6945 | defined in this file. */ | |
460bd0e3 | 6946 | void |
35b1a6fa | 6947 | c_stddef_cpp_builtins(void) |
3df89291 | 6948 | { |
5279d739 ZW |
6949 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
6950 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
6951 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
6952 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
85291069 JM |
6953 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
6954 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
c466b2cd KVH |
6955 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
6956 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
207bf79d JM |
6957 | if (SIG_ATOMIC_TYPE) |
6958 | builtin_define_with_value ("__SIG_ATOMIC_TYPE__", SIG_ATOMIC_TYPE, 0); | |
6959 | if (INT8_TYPE) | |
6960 | builtin_define_with_value ("__INT8_TYPE__", INT8_TYPE, 0); | |
6961 | if (INT16_TYPE) | |
6962 | builtin_define_with_value ("__INT16_TYPE__", INT16_TYPE, 0); | |
6963 | if (INT32_TYPE) | |
6964 | builtin_define_with_value ("__INT32_TYPE__", INT32_TYPE, 0); | |
6965 | if (INT64_TYPE) | |
6966 | builtin_define_with_value ("__INT64_TYPE__", INT64_TYPE, 0); | |
6967 | if (UINT8_TYPE) | |
6968 | builtin_define_with_value ("__UINT8_TYPE__", UINT8_TYPE, 0); | |
6969 | if (UINT16_TYPE) | |
6970 | builtin_define_with_value ("__UINT16_TYPE__", UINT16_TYPE, 0); | |
6971 | if (UINT32_TYPE) | |
6972 | builtin_define_with_value ("__UINT32_TYPE__", UINT32_TYPE, 0); | |
6973 | if (UINT64_TYPE) | |
6974 | builtin_define_with_value ("__UINT64_TYPE__", UINT64_TYPE, 0); | |
6975 | if (INT_LEAST8_TYPE) | |
6976 | builtin_define_with_value ("__INT_LEAST8_TYPE__", INT_LEAST8_TYPE, 0); | |
6977 | if (INT_LEAST16_TYPE) | |
6978 | builtin_define_with_value ("__INT_LEAST16_TYPE__", INT_LEAST16_TYPE, 0); | |
6979 | if (INT_LEAST32_TYPE) | |
6980 | builtin_define_with_value ("__INT_LEAST32_TYPE__", INT_LEAST32_TYPE, 0); | |
6981 | if (INT_LEAST64_TYPE) | |
6982 | builtin_define_with_value ("__INT_LEAST64_TYPE__", INT_LEAST64_TYPE, 0); | |
6983 | if (UINT_LEAST8_TYPE) | |
6984 | builtin_define_with_value ("__UINT_LEAST8_TYPE__", UINT_LEAST8_TYPE, 0); | |
6985 | if (UINT_LEAST16_TYPE) | |
6986 | builtin_define_with_value ("__UINT_LEAST16_TYPE__", UINT_LEAST16_TYPE, 0); | |
6987 | if (UINT_LEAST32_TYPE) | |
6988 | builtin_define_with_value ("__UINT_LEAST32_TYPE__", UINT_LEAST32_TYPE, 0); | |
6989 | if (UINT_LEAST64_TYPE) | |
6990 | builtin_define_with_value ("__UINT_LEAST64_TYPE__", UINT_LEAST64_TYPE, 0); | |
6991 | if (INT_FAST8_TYPE) | |
6992 | builtin_define_with_value ("__INT_FAST8_TYPE__", INT_FAST8_TYPE, 0); | |
6993 | if (INT_FAST16_TYPE) | |
6994 | builtin_define_with_value ("__INT_FAST16_TYPE__", INT_FAST16_TYPE, 0); | |
6995 | if (INT_FAST32_TYPE) | |
6996 | builtin_define_with_value ("__INT_FAST32_TYPE__", INT_FAST32_TYPE, 0); | |
6997 | if (INT_FAST64_TYPE) | |
6998 | builtin_define_with_value ("__INT_FAST64_TYPE__", INT_FAST64_TYPE, 0); | |
6999 | if (UINT_FAST8_TYPE) | |
7000 | builtin_define_with_value ("__UINT_FAST8_TYPE__", UINT_FAST8_TYPE, 0); | |
7001 | if (UINT_FAST16_TYPE) | |
7002 | builtin_define_with_value ("__UINT_FAST16_TYPE__", UINT_FAST16_TYPE, 0); | |
7003 | if (UINT_FAST32_TYPE) | |
7004 | builtin_define_with_value ("__UINT_FAST32_TYPE__", UINT_FAST32_TYPE, 0); | |
7005 | if (UINT_FAST64_TYPE) | |
7006 | builtin_define_with_value ("__UINT_FAST64_TYPE__", UINT_FAST64_TYPE, 0); | |
7007 | if (INTPTR_TYPE) | |
7008 | builtin_define_with_value ("__INTPTR_TYPE__", INTPTR_TYPE, 0); | |
7009 | if (UINTPTR_TYPE) | |
7010 | builtin_define_with_value ("__UINTPTR_TYPE__", UINTPTR_TYPE, 0); | |
676997cf RH |
7011 | } |
7012 | ||
6431177a | 7013 | static void |
35b1a6fa | 7014 | c_init_attributes (void) |
6431177a JM |
7015 | { |
7016 | /* Fill in the built_in_attributes array. */ | |
4a90aeeb | 7017 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
6431177a | 7018 | built_in_attributes[(int) ENUM] = NULL_TREE; |
4a90aeeb | 7019 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
c62c040f | 7020 | built_in_attributes[(int) ENUM] = build_int_cst (integer_type_node, VALUE); |
e384e6b5 BS |
7021 | #define DEF_ATTR_STRING(ENUM, VALUE) \ |
7022 | built_in_attributes[(int) ENUM] = build_string (strlen (VALUE), VALUE); | |
6431177a JM |
7023 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
7024 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
7025 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
7026 | built_in_attributes[(int) ENUM] \ | |
7027 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
7028 | built_in_attributes[(int) VALUE], \ | |
7029 | built_in_attributes[(int) CHAIN]); | |
6431177a JM |
7030 | #include "builtin-attrs.def" |
7031 | #undef DEF_ATTR_NULL_TREE | |
7032 | #undef DEF_ATTR_INT | |
7033 | #undef DEF_ATTR_IDENT | |
7034 | #undef DEF_ATTR_TREE_LIST | |
03dc0325 | 7035 | } |
26f943fd | 7036 | |
943f82e7 JM |
7037 | /* Returns TRUE iff the attribute indicated by ATTR_ID takes a plain |
7038 | identifier as an argument, so the front end shouldn't look it up. */ | |
7039 | ||
7040 | bool | |
564a129d | 7041 | attribute_takes_identifier_p (const_tree attr_id) |
943f82e7 | 7042 | { |
f231b5ff | 7043 | const struct attribute_spec *spec = lookup_attribute_spec (attr_id); |
1b9b91a6 JM |
7044 | if (spec == NULL) |
7045 | /* Unknown attribute that we'll end up ignoring, return true so we | |
7046 | don't complain about an identifier argument. */ | |
7047 | return true; | |
7048 | else if (!strcmp ("mode", spec->name) | |
7049 | || !strcmp ("format", spec->name) | |
7050 | || !strcmp ("cleanup", spec->name)) | |
564a129d JM |
7051 | return true; |
7052 | else | |
7053 | return targetm.attribute_takes_identifier_p (attr_id); | |
943f82e7 JM |
7054 | } |
7055 | ||
349ae713 NB |
7056 | /* Attribute handlers common to C front ends. */ |
7057 | ||
7058 | /* Handle a "packed" attribute; arguments as in | |
7059 | struct attribute_spec.handler. */ | |
7060 | ||
7061 | static tree | |
e18476eb | 7062 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
a742c759 | 7063 | int flags, bool *no_add_attrs) |
349ae713 | 7064 | { |
c6e4cc53 | 7065 | if (TYPE_P (*node)) |
349ae713 NB |
7066 | { |
7067 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 7068 | *node = build_variant_type_copy (*node); |
c6e4cc53 | 7069 | TYPE_PACKED (*node) = 1; |
349ae713 NB |
7070 | } |
7071 | else if (TREE_CODE (*node) == FIELD_DECL) | |
646c0835 | 7072 | { |
2cd36c22 AN |
7073 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT |
7074 | /* Still pack bitfields. */ | |
7075 | && ! DECL_INITIAL (*node)) | |
646c0835 NS |
7076 | warning (OPT_Wattributes, |
7077 | "%qE attribute ignored for field of type %qT", | |
7078 | name, TREE_TYPE (*node)); | |
7079 | else | |
7080 | DECL_PACKED (*node) = 1; | |
7081 | } | |
349ae713 | 7082 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
c6e4cc53 NS |
7083 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
7084 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
7085 | that changes what the typedef is typing. */ | |
349ae713 NB |
7086 | else |
7087 | { | |
5c498b10 | 7088 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7089 | *no_add_attrs = true; |
7090 | } | |
7091 | ||
7092 | return NULL_TREE; | |
7093 | } | |
7094 | ||
7095 | /* Handle a "nocommon" attribute; arguments as in | |
7096 | struct attribute_spec.handler. */ | |
7097 | ||
7098 | static tree | |
35b1a6fa | 7099 | handle_nocommon_attribute (tree *node, tree name, |
e18476eb BI |
7100 | tree ARG_UNUSED (args), |
7101 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 7102 | { |
0ae9bd27 | 7103 | if (VAR_P (*node)) |
349ae713 NB |
7104 | DECL_COMMON (*node) = 0; |
7105 | else | |
7106 | { | |
5c498b10 | 7107 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7108 | *no_add_attrs = true; |
7109 | } | |
7110 | ||
7111 | return NULL_TREE; | |
7112 | } | |
7113 | ||
7114 | /* Handle a "common" attribute; arguments as in | |
7115 | struct attribute_spec.handler. */ | |
7116 | ||
7117 | static tree | |
e18476eb BI |
7118 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7119 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 7120 | { |
0ae9bd27 | 7121 | if (VAR_P (*node)) |
349ae713 NB |
7122 | DECL_COMMON (*node) = 1; |
7123 | else | |
7124 | { | |
5c498b10 | 7125 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7126 | *no_add_attrs = true; |
7127 | } | |
7128 | ||
7129 | return NULL_TREE; | |
7130 | } | |
7131 | ||
7132 | /* Handle a "noreturn" attribute; arguments as in | |
7133 | struct attribute_spec.handler. */ | |
7134 | ||
7135 | static tree | |
e18476eb BI |
7136 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7137 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
7138 | { |
7139 | tree type = TREE_TYPE (*node); | |
7140 | ||
7141 | /* See FIXME comment in c_common_attribute_table. */ | |
2debdb4f NP |
7142 | if (TREE_CODE (*node) == FUNCTION_DECL |
7143 | || objc_method_decl (TREE_CODE (*node))) | |
349ae713 NB |
7144 | TREE_THIS_VOLATILE (*node) = 1; |
7145 | else if (TREE_CODE (type) == POINTER_TYPE | |
7146 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
7147 | TREE_TYPE (*node) | |
6e7ceb17 PC |
7148 | = (build_qualified_type |
7149 | (build_pointer_type | |
7150 | (build_type_variant (TREE_TYPE (type), | |
7151 | TYPE_READONLY (TREE_TYPE (type)), 1)), | |
7152 | TYPE_QUALS (type))); | |
349ae713 NB |
7153 | else |
7154 | { | |
5c498b10 | 7155 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7156 | *no_add_attrs = true; |
7157 | } | |
7158 | ||
7159 | return NULL_TREE; | |
7160 | } | |
7161 | ||
52bf96d2 JH |
7162 | /* Handle a "hot" and attribute; arguments as in |
7163 | struct attribute_spec.handler. */ | |
7164 | ||
7165 | static tree | |
7166 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
ab442df7 | 7167 | int ARG_UNUSED (flags), bool *no_add_attrs) |
52bf96d2 | 7168 | { |
e45abe1f RH |
7169 | if (TREE_CODE (*node) == FUNCTION_DECL |
7170 | || TREE_CODE (*node) == LABEL_DECL) | |
52bf96d2 JH |
7171 | { |
7172 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
7173 | { | |
45484dcf MP |
7174 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
7175 | "with attribute %qs", name, "cold"); | |
52bf96d2 JH |
7176 | *no_add_attrs = true; |
7177 | } | |
5779e713 MM |
7178 | /* Most of the rest of the hot processing is done later with |
7179 | lookup_attribute. */ | |
52bf96d2 JH |
7180 | } |
7181 | else | |
7182 | { | |
7183 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7184 | *no_add_attrs = true; | |
7185 | } | |
7186 | ||
7187 | return NULL_TREE; | |
7188 | } | |
e45abe1f | 7189 | |
52bf96d2 JH |
7190 | /* Handle a "cold" and attribute; arguments as in |
7191 | struct attribute_spec.handler. */ | |
7192 | ||
7193 | static tree | |
7194 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
7195 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7196 | { | |
e45abe1f RH |
7197 | if (TREE_CODE (*node) == FUNCTION_DECL |
7198 | || TREE_CODE (*node) == LABEL_DECL) | |
52bf96d2 JH |
7199 | { |
7200 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
7201 | { | |
45484dcf MP |
7202 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
7203 | "with attribute %qs", name, "hot"); | |
52bf96d2 JH |
7204 | *no_add_attrs = true; |
7205 | } | |
5779e713 MM |
7206 | /* Most of the rest of the cold processing is done later with |
7207 | lookup_attribute. */ | |
52bf96d2 JH |
7208 | } |
7209 | else | |
7210 | { | |
7211 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7212 | *no_add_attrs = true; | |
7213 | } | |
7214 | ||
7215 | return NULL_TREE; | |
7216 | } | |
7217 | ||
e664c61c | 7218 | /* Handle a "no_sanitize_address" attribute; arguments as in |
77bc5132 JJ |
7219 | struct attribute_spec.handler. */ |
7220 | ||
7221 | static tree | |
e664c61c KS |
7222 | handle_no_sanitize_address_attribute (tree *node, tree name, tree, int, |
7223 | bool *no_add_attrs) | |
77bc5132 JJ |
7224 | { |
7225 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7226 | { | |
7227 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7228 | *no_add_attrs = true; | |
7229 | } | |
7230 | ||
7231 | return NULL_TREE; | |
7232 | } | |
7233 | ||
e664c61c KS |
7234 | /* Handle a "no_address_safety_analysis" attribute; arguments as in |
7235 | struct attribute_spec.handler. */ | |
7236 | ||
7237 | static tree | |
7238 | handle_no_address_safety_analysis_attribute (tree *node, tree name, tree, int, | |
7239 | bool *no_add_attrs) | |
7240 | { | |
7241 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7242 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7243 | else if (!lookup_attribute ("no_sanitize_address", DECL_ATTRIBUTES (*node))) | |
7244 | DECL_ATTRIBUTES (*node) | |
7245 | = tree_cons (get_identifier ("no_sanitize_address"), | |
7246 | NULL_TREE, DECL_ATTRIBUTES (*node)); | |
7247 | *no_add_attrs = true; | |
7248 | return NULL_TREE; | |
7249 | } | |
7250 | ||
ce6923c5 MP |
7251 | /* Handle a "no_sanitize_undefined" attribute; arguments as in |
7252 | struct attribute_spec.handler. */ | |
7253 | ||
7254 | static tree | |
7255 | handle_no_sanitize_undefined_attribute (tree *node, tree name, tree, int, | |
7256 | bool *no_add_attrs) | |
7257 | { | |
7258 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7259 | { | |
7260 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7261 | *no_add_attrs = true; | |
7262 | } | |
7263 | ||
7264 | return NULL_TREE; | |
7265 | } | |
7266 | ||
5434dc07 MD |
7267 | /* Handle a "stack_protect" attribute; arguments as in |
7268 | struct attribute_spec.handler. */ | |
7269 | static tree | |
7270 | handle_stack_protect_attribute (tree *node, tree name, tree, int, | |
7271 | bool *no_add_attrs) | |
7272 | { | |
7273 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7274 | { | |
7275 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7276 | *no_add_attrs = true; | |
7277 | } | |
7278 | else | |
7279 | DECL_ATTRIBUTES (*node) | |
7280 | = tree_cons (get_identifier ("stack_protect"), | |
7281 | NULL_TREE, DECL_ATTRIBUTES (*node)); | |
7282 | ||
7283 | return NULL_TREE; | |
7284 | } | |
7285 | ||
349ae713 NB |
7286 | /* Handle a "noinline" attribute; arguments as in |
7287 | struct attribute_spec.handler. */ | |
7288 | ||
7289 | static tree | |
35b1a6fa | 7290 | handle_noinline_attribute (tree *node, tree name, |
e18476eb BI |
7291 | tree ARG_UNUSED (args), |
7292 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
7293 | { |
7294 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
45484dcf MP |
7295 | { |
7296 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (*node))) | |
7297 | { | |
7298 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
7299 | "with attribute %qs", name, "always_inline"); | |
7300 | *no_add_attrs = true; | |
7301 | } | |
7302 | else | |
7303 | DECL_UNINLINABLE (*node) = 1; | |
7304 | } | |
349ae713 NB |
7305 | else |
7306 | { | |
5c498b10 | 7307 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7308 | *no_add_attrs = true; |
7309 | } | |
7310 | ||
7311 | return NULL_TREE; | |
7312 | } | |
7313 | ||
86631ea3 MJ |
7314 | /* Handle a "noclone" attribute; arguments as in |
7315 | struct attribute_spec.handler. */ | |
7316 | ||
7317 | static tree | |
7318 | handle_noclone_attribute (tree *node, tree name, | |
7319 | tree ARG_UNUSED (args), | |
7320 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7321 | { | |
7322 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7323 | { | |
7324 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7325 | *no_add_attrs = true; | |
7326 | } | |
7327 | ||
7328 | return NULL_TREE; | |
7329 | } | |
7330 | ||
185c9e56 ML |
7331 | /* Handle a "no_icf" attribute; arguments as in |
7332 | struct attribute_spec.handler. */ | |
7333 | ||
7334 | static tree | |
7335 | handle_noicf_attribute (tree *node, tree name, | |
7336 | tree ARG_UNUSED (args), | |
7337 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7338 | { | |
7339 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7340 | { | |
7341 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7342 | *no_add_attrs = true; | |
7343 | } | |
7344 | ||
7345 | return NULL_TREE; | |
7346 | } | |
7347 | ||
7348 | ||
349ae713 NB |
7349 | /* Handle a "always_inline" attribute; arguments as in |
7350 | struct attribute_spec.handler. */ | |
7351 | ||
7352 | static tree | |
35b1a6fa | 7353 | handle_always_inline_attribute (tree *node, tree name, |
e18476eb BI |
7354 | tree ARG_UNUSED (args), |
7355 | int ARG_UNUSED (flags), | |
a742c759 | 7356 | bool *no_add_attrs) |
349ae713 NB |
7357 | { |
7358 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7359 | { | |
45484dcf MP |
7360 | if (lookup_attribute ("noinline", DECL_ATTRIBUTES (*node))) |
7361 | { | |
7362 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
7363 | "with %qs attribute", name, "noinline"); | |
7364 | *no_add_attrs = true; | |
7365 | } | |
7366 | else | |
7367 | /* Set the attribute and mark it for disregarding inline | |
7368 | limits. */ | |
7369 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
349ae713 NB |
7370 | } |
7371 | else | |
7372 | { | |
5c498b10 | 7373 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 | 7374 | *no_add_attrs = true; |
4eb7fd83 JJ |
7375 | } |
7376 | ||
7377 | return NULL_TREE; | |
7378 | } | |
7379 | ||
7380 | /* Handle a "gnu_inline" attribute; arguments as in | |
7381 | struct attribute_spec.handler. */ | |
7382 | ||
7383 | static tree | |
7384 | handle_gnu_inline_attribute (tree *node, tree name, | |
7385 | tree ARG_UNUSED (args), | |
7386 | int ARG_UNUSED (flags), | |
7387 | bool *no_add_attrs) | |
7388 | { | |
7389 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
7390 | { | |
7391 | /* Do nothing else, just set the attribute. We'll get at | |
7392 | it later with lookup_attribute. */ | |
7393 | } | |
7394 | else | |
7395 | { | |
7396 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7397 | *no_add_attrs = true; | |
46a4da10 JH |
7398 | } |
7399 | ||
7400 | return NULL_TREE; | |
7401 | } | |
7402 | ||
7403 | /* Handle a "leaf" attribute; arguments as in | |
7404 | struct attribute_spec.handler. */ | |
7405 | ||
7406 | static tree | |
7407 | handle_leaf_attribute (tree *node, tree name, | |
7408 | tree ARG_UNUSED (args), | |
7409 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7410 | { | |
7411 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7412 | { | |
7413 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7414 | *no_add_attrs = true; | |
7415 | } | |
7416 | if (!TREE_PUBLIC (*node)) | |
7417 | { | |
7418 | warning (OPT_Wattributes, "%qE attribute has no effect on unit local functions", name); | |
7419 | *no_add_attrs = true; | |
349ae713 NB |
7420 | } |
7421 | ||
7422 | return NULL_TREE; | |
7423 | } | |
7424 | ||
d752cfdb JJ |
7425 | /* Handle an "artificial" attribute; arguments as in |
7426 | struct attribute_spec.handler. */ | |
7427 | ||
7428 | static tree | |
7429 | handle_artificial_attribute (tree *node, tree name, | |
7430 | tree ARG_UNUSED (args), | |
7431 | int ARG_UNUSED (flags), | |
7432 | bool *no_add_attrs) | |
7433 | { | |
7434 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
7435 | { | |
7436 | /* Do nothing else, just set the attribute. We'll get at | |
7437 | it later with lookup_attribute. */ | |
7438 | } | |
7439 | else | |
7440 | { | |
7441 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7442 | *no_add_attrs = true; | |
7443 | } | |
7444 | ||
7445 | return NULL_TREE; | |
7446 | } | |
7447 | ||
0691d1d4 RG |
7448 | /* Handle a "flatten" attribute; arguments as in |
7449 | struct attribute_spec.handler. */ | |
7450 | ||
7451 | static tree | |
7452 | handle_flatten_attribute (tree *node, tree name, | |
c22cacf3 MS |
7453 | tree args ATTRIBUTE_UNUSED, |
7454 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0691d1d4 RG |
7455 | { |
7456 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7457 | /* Do nothing else, just set the attribute. We'll get at | |
7458 | it later with lookup_attribute. */ | |
7459 | ; | |
7460 | else | |
7461 | { | |
7462 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7463 | *no_add_attrs = true; | |
7464 | } | |
7465 | ||
7466 | return NULL_TREE; | |
7467 | } | |
7468 | ||
d2af6a68 JJ |
7469 | /* Handle a "warning" or "error" attribute; arguments as in |
7470 | struct attribute_spec.handler. */ | |
7471 | ||
7472 | static tree | |
7473 | handle_error_attribute (tree *node, tree name, tree args, | |
7474 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7475 | { | |
7476 | if (TREE_CODE (*node) == FUNCTION_DECL | |
cf35e2b1 | 7477 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) |
d2af6a68 JJ |
7478 | /* Do nothing else, just set the attribute. We'll get at |
7479 | it later with lookup_attribute. */ | |
7480 | ; | |
7481 | else | |
7482 | { | |
7483 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7484 | *no_add_attrs = true; | |
7485 | } | |
7486 | ||
7487 | return NULL_TREE; | |
7488 | } | |
0691d1d4 | 7489 | |
349ae713 NB |
7490 | /* Handle a "used" attribute; arguments as in |
7491 | struct attribute_spec.handler. */ | |
7492 | ||
7493 | static tree | |
e18476eb BI |
7494 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
7495 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 7496 | { |
d7ddbe24 RH |
7497 | tree node = *pnode; |
7498 | ||
7499 | if (TREE_CODE (node) == FUNCTION_DECL | |
0ae9bd27 | 7500 | || (VAR_P (node) && TREE_STATIC (node)) |
3797cb21 | 7501 | || (TREE_CODE (node) == TYPE_DECL)) |
4d7d0451 | 7502 | { |
4d7d0451 | 7503 | TREE_USED (node) = 1; |
8e3e233b | 7504 | DECL_PRESERVE_P (node) = 1; |
0ae9bd27 | 7505 | if (VAR_P (node)) |
ebfbbdc5 | 7506 | DECL_READ_P (node) = 1; |
4d7d0451 | 7507 | } |
349ae713 NB |
7508 | else |
7509 | { | |
5c498b10 | 7510 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7511 | *no_add_attrs = true; |
7512 | } | |
7513 | ||
7514 | return NULL_TREE; | |
7515 | } | |
7516 | ||
7517 | /* Handle a "unused" attribute; arguments as in | |
7518 | struct attribute_spec.handler. */ | |
7519 | ||
7520 | static tree | |
e18476eb BI |
7521 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7522 | int flags, bool *no_add_attrs) | |
349ae713 NB |
7523 | { |
7524 | if (DECL_P (*node)) | |
7525 | { | |
7526 | tree decl = *node; | |
7527 | ||
7528 | if (TREE_CODE (decl) == PARM_DECL | |
af05e6e5 | 7529 | || VAR_OR_FUNCTION_DECL_P (decl) |
349ae713 NB |
7530 | || TREE_CODE (decl) == LABEL_DECL |
7531 | || TREE_CODE (decl) == TYPE_DECL) | |
ebfbbdc5 JJ |
7532 | { |
7533 | TREE_USED (decl) = 1; | |
0ae9bd27 | 7534 | if (VAR_P (decl) || TREE_CODE (decl) == PARM_DECL) |
ebfbbdc5 JJ |
7535 | DECL_READ_P (decl) = 1; |
7536 | } | |
349ae713 NB |
7537 | else |
7538 | { | |
5c498b10 | 7539 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7540 | *no_add_attrs = true; |
7541 | } | |
7542 | } | |
7543 | else | |
7544 | { | |
7545 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 7546 | *node = build_variant_type_copy (*node); |
349ae713 NB |
7547 | TREE_USED (*node) = 1; |
7548 | } | |
7549 | ||
7550 | return NULL_TREE; | |
7551 | } | |
7552 | ||
ce91e74c JH |
7553 | /* Handle a "externally_visible" attribute; arguments as in |
7554 | struct attribute_spec.handler. */ | |
7555 | ||
7556 | static tree | |
7557 | handle_externally_visible_attribute (tree *pnode, tree name, | |
7558 | tree ARG_UNUSED (args), | |
7559 | int ARG_UNUSED (flags), | |
7560 | bool *no_add_attrs) | |
7561 | { | |
7562 | tree node = *pnode; | |
7563 | ||
21b634ae | 7564 | if (VAR_OR_FUNCTION_DECL_P (node)) |
ce91e74c | 7565 | { |
343d4b27 JJ |
7566 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
7567 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
7568 | { | |
7569 | warning (OPT_Wattributes, | |
7570 | "%qE attribute have effect only on public objects", name); | |
7571 | *no_add_attrs = true; | |
7572 | } | |
ce91e74c | 7573 | } |
ce91e74c JH |
7574 | else |
7575 | { | |
7576 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7577 | *no_add_attrs = true; | |
7578 | } | |
7579 | ||
7580 | return NULL_TREE; | |
7581 | } | |
7582 | ||
7861b648 AK |
7583 | /* Handle the "no_reorder" attribute. Arguments as in |
7584 | struct attribute_spec.handler. */ | |
7585 | ||
7586 | static tree | |
7587 | handle_no_reorder_attribute (tree *pnode, | |
7588 | tree name, | |
7589 | tree, | |
7590 | int, | |
7591 | bool *no_add_attrs) | |
7592 | { | |
7593 | tree node = *pnode; | |
7594 | ||
21b634ae | 7595 | if (!VAR_OR_FUNCTION_DECL_P (node) |
7861b648 AK |
7596 | && !(TREE_STATIC (node) || DECL_EXTERNAL (node))) |
7597 | { | |
7598 | warning (OPT_Wattributes, | |
7599 | "%qE attribute only affects top level objects", | |
7600 | name); | |
7601 | *no_add_attrs = true; | |
7602 | } | |
7603 | ||
7604 | return NULL_TREE; | |
7605 | } | |
7606 | ||
349ae713 NB |
7607 | /* Handle a "const" attribute; arguments as in |
7608 | struct attribute_spec.handler. */ | |
7609 | ||
7610 | static tree | |
e18476eb BI |
7611 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7612 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
7613 | { |
7614 | tree type = TREE_TYPE (*node); | |
7615 | ||
7616 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
7617 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7618 | TREE_READONLY (*node) = 1; | |
7619 | else if (TREE_CODE (type) == POINTER_TYPE | |
7620 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
7621 | TREE_TYPE (*node) | |
6e7ceb17 PC |
7622 | = (build_qualified_type |
7623 | (build_pointer_type | |
7624 | (build_type_variant (TREE_TYPE (type), 1, | |
7625 | TREE_THIS_VOLATILE (TREE_TYPE (type)))), | |
7626 | TYPE_QUALS (type))); | |
349ae713 NB |
7627 | else |
7628 | { | |
5c498b10 | 7629 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7630 | *no_add_attrs = true; |
7631 | } | |
7632 | ||
7633 | return NULL_TREE; | |
7634 | } | |
7635 | ||
7636 | /* Handle a "transparent_union" attribute; arguments as in | |
7637 | struct attribute_spec.handler. */ | |
7638 | ||
7639 | static tree | |
35b1a6fa | 7640 | handle_transparent_union_attribute (tree *node, tree name, |
e18476eb | 7641 | tree ARG_UNUSED (args), int flags, |
a742c759 | 7642 | bool *no_add_attrs) |
349ae713 | 7643 | { |
4009f2e7 | 7644 | tree type; |
52dd234b RH |
7645 | |
7646 | *no_add_attrs = true; | |
349ae713 | 7647 | |
e28d52cf DS |
7648 | |
7649 | if (TREE_CODE (*node) == TYPE_DECL | |
7650 | && ! (flags & ATTR_FLAG_CXX11)) | |
4009f2e7 JM |
7651 | node = &TREE_TYPE (*node); |
7652 | type = *node; | |
349ae713 | 7653 | |
52dd234b | 7654 | if (TREE_CODE (type) == UNION_TYPE) |
349ae713 | 7655 | { |
d58d6eb5 JM |
7656 | /* Make sure that the first field will work for a transparent union. |
7657 | If the type isn't complete yet, leave the check to the code in | |
7658 | finish_struct. */ | |
7659 | if (TYPE_SIZE (type)) | |
7660 | { | |
7661 | tree first = first_field (type); | |
7662 | if (first == NULL_TREE | |
7663 | || DECL_ARTIFICIAL (first) | |
7664 | || TYPE_MODE (type) != DECL_MODE (first)) | |
7665 | goto ignored; | |
7666 | } | |
7667 | ||
349ae713 | 7668 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
52dd234b | 7669 | { |
d58d6eb5 JM |
7670 | /* If the type isn't complete yet, setting the flag |
7671 | on a variant wouldn't ever be checked. */ | |
7672 | if (!TYPE_SIZE (type)) | |
7673 | goto ignored; | |
7674 | ||
7675 | /* build_duplicate_type doesn't work for C++. */ | |
7676 | if (c_dialect_cxx ()) | |
52dd234b RH |
7677 | goto ignored; |
7678 | ||
7679 | /* A type variant isn't good enough, since we don't a cast | |
7680 | to such a type removed as a no-op. */ | |
7681 | *node = type = build_duplicate_type (type); | |
7682 | } | |
7683 | ||
ebf0bf7f | 7684 | TYPE_TRANSPARENT_AGGR (type) = 1; |
52dd234b | 7685 | return NULL_TREE; |
349ae713 NB |
7686 | } |
7687 | ||
52dd234b RH |
7688 | ignored: |
7689 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
7690 | return NULL_TREE; |
7691 | } | |
7692 | ||
fc8600f9 MM |
7693 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
7694 | get the requested priority for a constructor or destructor, | |
7695 | possibly issuing diagnostics for invalid or reserved | |
7696 | priorities. */ | |
7697 | ||
7698 | static priority_type | |
7699 | get_priority (tree args, bool is_destructor) | |
7700 | { | |
7701 | HOST_WIDE_INT pri; | |
b2f4bed8 | 7702 | tree arg; |
fc8600f9 MM |
7703 | |
7704 | if (!args) | |
7705 | return DEFAULT_INIT_PRIORITY; | |
b8698a0f | 7706 | |
f6fc5c86 MM |
7707 | if (!SUPPORTS_INIT_PRIORITY) |
7708 | { | |
7709 | if (is_destructor) | |
7710 | error ("destructor priorities are not supported"); | |
7711 | else | |
7712 | error ("constructor priorities are not supported"); | |
7713 | return DEFAULT_INIT_PRIORITY; | |
7714 | } | |
7715 | ||
b2f4bed8 | 7716 | arg = TREE_VALUE (args); |
fad7652e JJ |
7717 | if (TREE_CODE (arg) == IDENTIFIER_NODE) |
7718 | goto invalid; | |
7719 | if (arg == error_mark_node) | |
7720 | return DEFAULT_INIT_PRIORITY; | |
8d0d1915 | 7721 | arg = default_conversion (arg); |
9541ffee | 7722 | if (!tree_fits_shwi_p (arg) |
b2f4bed8 | 7723 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) |
fc8600f9 MM |
7724 | goto invalid; |
7725 | ||
9439e9a1 | 7726 | pri = tree_to_shwi (arg); |
fc8600f9 MM |
7727 | if (pri < 0 || pri > MAX_INIT_PRIORITY) |
7728 | goto invalid; | |
7729 | ||
7730 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
7731 | { | |
7732 | if (is_destructor) | |
7733 | warning (0, | |
7734 | "destructor priorities from 0 to %d are reserved " | |
b8698a0f | 7735 | "for the implementation", |
fc8600f9 MM |
7736 | MAX_RESERVED_INIT_PRIORITY); |
7737 | else | |
7738 | warning (0, | |
7739 | "constructor priorities from 0 to %d are reserved " | |
b8698a0f | 7740 | "for the implementation", |
fc8600f9 MM |
7741 | MAX_RESERVED_INIT_PRIORITY); |
7742 | } | |
7743 | return pri; | |
7744 | ||
7745 | invalid: | |
7746 | if (is_destructor) | |
7747 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
7748 | MAX_INIT_PRIORITY); | |
7749 | else | |
7750 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
7751 | MAX_INIT_PRIORITY); | |
7752 | return DEFAULT_INIT_PRIORITY; | |
7753 | } | |
7754 | ||
349ae713 NB |
7755 | /* Handle a "constructor" attribute; arguments as in |
7756 | struct attribute_spec.handler. */ | |
7757 | ||
7758 | static tree | |
fc8600f9 | 7759 | handle_constructor_attribute (tree *node, tree name, tree args, |
e18476eb | 7760 | int ARG_UNUSED (flags), |
a742c759 | 7761 | bool *no_add_attrs) |
349ae713 NB |
7762 | { |
7763 | tree decl = *node; | |
7764 | tree type = TREE_TYPE (decl); | |
7765 | ||
7766 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7767 | && TREE_CODE (type) == FUNCTION_TYPE | |
7768 | && decl_function_context (decl) == 0) | |
7769 | { | |
fc8600f9 | 7770 | priority_type priority; |
349ae713 | 7771 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
fc8600f9 MM |
7772 | priority = get_priority (args, /*is_destructor=*/false); |
7773 | SET_DECL_INIT_PRIORITY (decl, priority); | |
349ae713 NB |
7774 | TREE_USED (decl) = 1; |
7775 | } | |
7776 | else | |
7777 | { | |
5c498b10 | 7778 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7779 | *no_add_attrs = true; |
7780 | } | |
7781 | ||
7782 | return NULL_TREE; | |
7783 | } | |
7784 | ||
7785 | /* Handle a "destructor" attribute; arguments as in | |
7786 | struct attribute_spec.handler. */ | |
7787 | ||
7788 | static tree | |
fc8600f9 | 7789 | handle_destructor_attribute (tree *node, tree name, tree args, |
e18476eb | 7790 | int ARG_UNUSED (flags), |
a742c759 | 7791 | bool *no_add_attrs) |
349ae713 NB |
7792 | { |
7793 | tree decl = *node; | |
7794 | tree type = TREE_TYPE (decl); | |
7795 | ||
7796 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7797 | && TREE_CODE (type) == FUNCTION_TYPE | |
7798 | && decl_function_context (decl) == 0) | |
7799 | { | |
fc8600f9 | 7800 | priority_type priority; |
349ae713 | 7801 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
fc8600f9 MM |
7802 | priority = get_priority (args, /*is_destructor=*/true); |
7803 | SET_DECL_FINI_PRIORITY (decl, priority); | |
349ae713 NB |
7804 | TREE_USED (decl) = 1; |
7805 | } | |
7806 | else | |
7807 | { | |
5c498b10 | 7808 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7809 | *no_add_attrs = true; |
7810 | } | |
7811 | ||
7812 | return NULL_TREE; | |
7813 | } | |
7814 | ||
4d451982 MLI |
7815 | /* Nonzero if the mode is a valid vector mode for this architecture. |
7816 | This returns nonzero even if there is no hardware support for the | |
7817 | vector mode, but we can emulate with narrower modes. */ | |
7818 | ||
7819 | static int | |
ef4bddc2 | 7820 | vector_mode_valid_p (machine_mode mode) |
4d451982 MLI |
7821 | { |
7822 | enum mode_class mclass = GET_MODE_CLASS (mode); | |
ef4bddc2 | 7823 | machine_mode innermode; |
4d451982 MLI |
7824 | |
7825 | /* Doh! What's going on? */ | |
7826 | if (mclass != MODE_VECTOR_INT | |
7827 | && mclass != MODE_VECTOR_FLOAT | |
7828 | && mclass != MODE_VECTOR_FRACT | |
7829 | && mclass != MODE_VECTOR_UFRACT | |
7830 | && mclass != MODE_VECTOR_ACCUM | |
7831 | && mclass != MODE_VECTOR_UACCUM) | |
7832 | return 0; | |
7833 | ||
7834 | /* Hardware support. Woo hoo! */ | |
7835 | if (targetm.vector_mode_supported_p (mode)) | |
7836 | return 1; | |
7837 | ||
7838 | innermode = GET_MODE_INNER (mode); | |
7839 | ||
7840 | /* We should probably return 1 if requesting V4DI and we have no DI, | |
7841 | but we have V2DI, but this is probably very unlikely. */ | |
7842 | ||
7843 | /* If we have support for the inner mode, we can safely emulate it. | |
7844 | We may not have V2DI, but me can emulate with a pair of DIs. */ | |
7845 | return targetm.scalar_mode_supported_p (innermode); | |
7846 | } | |
7847 | ||
7848 | ||
349ae713 NB |
7849 | /* Handle a "mode" attribute; arguments as in |
7850 | struct attribute_spec.handler. */ | |
7851 | ||
7852 | static tree | |
e18476eb BI |
7853 | handle_mode_attribute (tree *node, tree name, tree args, |
7854 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
7855 | { |
7856 | tree type = *node; | |
88388a52 | 7857 | tree ident = TREE_VALUE (args); |
349ae713 NB |
7858 | |
7859 | *no_add_attrs = true; | |
7860 | ||
88388a52 | 7861 | if (TREE_CODE (ident) != IDENTIFIER_NODE) |
5c498b10 | 7862 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
7863 | else |
7864 | { | |
7865 | int j; | |
88388a52 | 7866 | const char *p = IDENTIFIER_POINTER (ident); |
349ae713 | 7867 | int len = strlen (p); |
ef4bddc2 | 7868 | machine_mode mode = VOIDmode; |
349ae713 | 7869 | tree typefm; |
6dd53648 | 7870 | bool valid_mode; |
349ae713 NB |
7871 | |
7872 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
7873 | && p[len - 1] == '_' && p[len - 2] == '_') | |
7874 | { | |
28dab132 | 7875 | char *newp = (char *) alloca (len - 1); |
349ae713 NB |
7876 | |
7877 | strcpy (newp, &p[2]); | |
7878 | newp[len - 4] = '\0'; | |
7879 | p = newp; | |
7880 | } | |
7881 | ||
7882 | /* Change this type to have a type with the specified mode. | |
7883 | First check for the special modes. */ | |
3f75a254 | 7884 | if (!strcmp (p, "byte")) |
349ae713 NB |
7885 | mode = byte_mode; |
7886 | else if (!strcmp (p, "word")) | |
7887 | mode = word_mode; | |
3f75a254 | 7888 | else if (!strcmp (p, "pointer")) |
349ae713 | 7889 | mode = ptr_mode; |
c7ff6e7a AK |
7890 | else if (!strcmp (p, "libgcc_cmp_return")) |
7891 | mode = targetm.libgcc_cmp_return_mode (); | |
7892 | else if (!strcmp (p, "libgcc_shift_count")) | |
7893 | mode = targetm.libgcc_shift_count_mode (); | |
7b0518e3 UW |
7894 | else if (!strcmp (p, "unwind_word")) |
7895 | mode = targetm.unwind_word_mode (); | |
349ae713 NB |
7896 | else |
7897 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
7898 | if (!strcmp (p, GET_MODE_NAME (j))) | |
61f03aba | 7899 | { |
ef4bddc2 | 7900 | mode = (machine_mode) j; |
61f03aba RH |
7901 | break; |
7902 | } | |
349ae713 NB |
7903 | |
7904 | if (mode == VOIDmode) | |
4a5eab38 | 7905 | { |
88388a52 | 7906 | error ("unknown machine mode %qE", ident); |
4a5eab38 PB |
7907 | return NULL_TREE; |
7908 | } | |
7909 | ||
6dd53648 RH |
7910 | valid_mode = false; |
7911 | switch (GET_MODE_CLASS (mode)) | |
4a5eab38 | 7912 | { |
6dd53648 RH |
7913 | case MODE_INT: |
7914 | case MODE_PARTIAL_INT: | |
7915 | case MODE_FLOAT: | |
9a8ce21f | 7916 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
7917 | case MODE_FRACT: |
7918 | case MODE_UFRACT: | |
7919 | case MODE_ACCUM: | |
7920 | case MODE_UACCUM: | |
6dd53648 RH |
7921 | valid_mode = targetm.scalar_mode_supported_p (mode); |
7922 | break; | |
7923 | ||
7924 | case MODE_COMPLEX_INT: | |
7925 | case MODE_COMPLEX_FLOAT: | |
7926 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
7927 | break; | |
7928 | ||
7929 | case MODE_VECTOR_INT: | |
7930 | case MODE_VECTOR_FLOAT: | |
ab22c1fa CF |
7931 | case MODE_VECTOR_FRACT: |
7932 | case MODE_VECTOR_UFRACT: | |
7933 | case MODE_VECTOR_ACCUM: | |
7934 | case MODE_VECTOR_UACCUM: | |
5c498b10 DD |
7935 | warning (OPT_Wattributes, "specifying vector types with " |
7936 | "__attribute__ ((mode)) is deprecated"); | |
7937 | warning (OPT_Wattributes, | |
7938 | "use __attribute__ ((vector_size)) instead"); | |
6dd53648 RH |
7939 | valid_mode = vector_mode_valid_p (mode); |
7940 | break; | |
4a5eab38 | 7941 | |
6dd53648 RH |
7942 | default: |
7943 | break; | |
7944 | } | |
7945 | if (!valid_mode) | |
7946 | { | |
9e637a26 | 7947 | error ("unable to emulate %qs", p); |
6dd53648 RH |
7948 | return NULL_TREE; |
7949 | } | |
4a5eab38 | 7950 | |
6dd53648 | 7951 | if (POINTER_TYPE_P (type)) |
cb2a532e | 7952 | { |
36c5e70a | 7953 | addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type)); |
ef4bddc2 | 7954 | tree (*fn)(tree, machine_mode, bool); |
6dd53648 | 7955 | |
36c5e70a | 7956 | if (!targetm.addr_space.valid_pointer_mode (mode, as)) |
cb2a532e | 7957 | { |
9e637a26 | 7958 | error ("invalid pointer mode %qs", p); |
cb2a532e AH |
7959 | return NULL_TREE; |
7960 | } | |
7961 | ||
c22cacf3 | 7962 | if (TREE_CODE (type) == POINTER_TYPE) |
6dd53648 | 7963 | fn = build_pointer_type_for_mode; |
4977bab6 | 7964 | else |
6dd53648 RH |
7965 | fn = build_reference_type_for_mode; |
7966 | typefm = fn (TREE_TYPE (type), mode, false); | |
cb2a532e | 7967 | } |
6dd53648 | 7968 | else |
ab22c1fa CF |
7969 | { |
7970 | /* For fixed-point modes, we need to test if the signness of type | |
7971 | and the machine mode are consistent. */ | |
7972 | if (ALL_FIXED_POINT_MODE_P (mode) | |
7973 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
7974 | { | |
d8a07487 | 7975 | error ("signedness of type and machine mode %qs don%'t match", p); |
ab22c1fa CF |
7976 | return NULL_TREE; |
7977 | } | |
7978 | /* For fixed-point modes, we need to pass saturating info. */ | |
7979 | typefm = lang_hooks.types.type_for_mode (mode, | |
7980 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
7981 | : TYPE_UNSIGNED (type)); | |
7982 | } | |
ec8465a5 | 7983 | |
6dd53648 RH |
7984 | if (typefm == NULL_TREE) |
7985 | { | |
61f03aba | 7986 | error ("no data type for mode %qs", p); |
6dd53648 RH |
7987 | return NULL_TREE; |
7988 | } | |
ec8465a5 RK |
7989 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
7990 | { | |
7991 | /* For enumeral types, copy the precision from the integer | |
7992 | type returned above. If not an INTEGER_TYPE, we can't use | |
7993 | this mode for this type. */ | |
7994 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
7995 | { | |
61f03aba | 7996 | error ("cannot use mode %qs for enumeral types", p); |
ec8465a5 RK |
7997 | return NULL_TREE; |
7998 | } | |
7999 | ||
99db1ef0 RH |
8000 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
8001 | { | |
8002 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
8003 | typefm = type; | |
8004 | } | |
8005 | else | |
8006 | { | |
8007 | /* We cannot build a type variant, as there's code that assumes | |
8008 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
8009 | debug generators. Instead, create a subrange type. This | |
8010 | results in all of the enumeral values being emitted only once | |
8011 | in the original, and the subtype gets them by reference. */ | |
8012 | if (TYPE_UNSIGNED (type)) | |
8013 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
8014 | else | |
8015 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
8016 | TREE_TYPE (typefm) = type; | |
8017 | } | |
ec8465a5 | 8018 | } |
a2d36602 RH |
8019 | else if (VECTOR_MODE_P (mode) |
8020 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
8021 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
61f03aba RH |
8022 | { |
8023 | error ("mode %qs applied to inappropriate type", p); | |
8024 | return NULL_TREE; | |
8025 | } | |
8026 | ||
6dd53648 | 8027 | *node = typefm; |
349ae713 NB |
8028 | } |
8029 | ||
8030 | return NULL_TREE; | |
8031 | } | |
8032 | ||
8033 | /* Handle a "section" attribute; arguments as in | |
8034 | struct attribute_spec.handler. */ | |
8035 | ||
8036 | static tree | |
e18476eb BI |
8037 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
8038 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
8039 | { |
8040 | tree decl = *node; | |
8041 | ||
0373796b | 8042 | if (!targetm_common.have_named_sections) |
349ae713 | 8043 | { |
0373796b JT |
8044 | error_at (DECL_SOURCE_LOCATION (*node), |
8045 | "section attributes are not supported for this target"); | |
8046 | goto fail; | |
8047 | } | |
9fb32434 | 8048 | |
0373796b | 8049 | user_defined_section_attribute = true; |
349ae713 | 8050 | |
21b634ae | 8051 | if (!VAR_OR_FUNCTION_DECL_P (decl)) |
0373796b JT |
8052 | { |
8053 | error ("section attribute not allowed for %q+D", *node); | |
8054 | goto fail; | |
349ae713 | 8055 | } |
0373796b JT |
8056 | |
8057 | if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
349ae713 | 8058 | { |
0373796b JT |
8059 | error ("section attribute argument not a string constant"); |
8060 | goto fail; | |
349ae713 NB |
8061 | } |
8062 | ||
0ae9bd27 | 8063 | if (VAR_P (decl) |
0373796b JT |
8064 | && current_function_decl != NULL_TREE |
8065 | && !TREE_STATIC (decl)) | |
8066 | { | |
8067 | error_at (DECL_SOURCE_LOCATION (decl), | |
8068 | "section attribute cannot be specified for local variables"); | |
8069 | goto fail; | |
8070 | } | |
8071 | ||
8072 | /* The decl may have already been given a section attribute | |
8073 | from a previous declaration. Ensure they match. */ | |
8074 | if (DECL_SECTION_NAME (decl) != NULL | |
8075 | && strcmp (DECL_SECTION_NAME (decl), | |
8076 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) | |
8077 | { | |
8078 | error ("section of %q+D conflicts with previous declaration", *node); | |
8079 | goto fail; | |
8080 | } | |
8081 | ||
0ae9bd27 | 8082 | if (VAR_P (decl) |
0373796b JT |
8083 | && !targetm.have_tls && targetm.emutls.tmpl_section |
8084 | && DECL_THREAD_LOCAL_P (decl)) | |
8085 | { | |
8086 | error ("section of %q+D cannot be overridden", *node); | |
8087 | goto fail; | |
8088 | } | |
8089 | ||
8090 | set_decl_section_name (decl, TREE_STRING_POINTER (TREE_VALUE (args))); | |
8091 | return NULL_TREE; | |
8092 | ||
8093 | fail: | |
8094 | *no_add_attrs = true; | |
349ae713 NB |
8095 | return NULL_TREE; |
8096 | } | |
8097 | ||
d19fa6b5 JM |
8098 | /* Check whether ALIGN is a valid user-specified alignment. If so, |
8099 | return its base-2 log; if not, output an error and return -1. If | |
8100 | ALLOW_ZERO then 0 is valid and should result in a return of -1 with | |
8101 | no error. */ | |
8102 | int | |
8103 | check_user_alignment (const_tree align, bool allow_zero) | |
8104 | { | |
8105 | int i; | |
8106 | ||
661a0813 MP |
8107 | if (error_operand_p (align)) |
8108 | return -1; | |
a859517f MP |
8109 | if (TREE_CODE (align) != INTEGER_CST |
8110 | || !INTEGRAL_TYPE_P (TREE_TYPE (align))) | |
d19fa6b5 JM |
8111 | { |
8112 | error ("requested alignment is not an integer constant"); | |
8113 | return -1; | |
8114 | } | |
8115 | else if (allow_zero && integer_zerop (align)) | |
8116 | return -1; | |
3f12f6e9 SKS |
8117 | else if (tree_int_cst_sgn (align) == -1 |
8118 | || (i = tree_log2 (align)) == -1) | |
d19fa6b5 | 8119 | { |
3f12f6e9 | 8120 | error ("requested alignment is not a positive power of 2"); |
d19fa6b5 JM |
8121 | return -1; |
8122 | } | |
8123 | else if (i >= HOST_BITS_PER_INT - BITS_PER_UNIT_LOG) | |
8124 | { | |
8125 | error ("requested alignment is too large"); | |
8126 | return -1; | |
8127 | } | |
8128 | return i; | |
8129 | } | |
8130 | ||
e28d52cf DS |
8131 | /* |
8132 | If in c++-11, check if the c++-11 alignment constraint with respect | |
8133 | to fundamental alignment (in [dcl.align]) are satisfied. If not in | |
8134 | c++-11 mode, does nothing. | |
8135 | ||
8136 | [dcl.align]2/ says: | |
8137 | ||
8138 | [* if the constant expression evaluates to a fundamental alignment, | |
8139 | the alignment requirement of the declared entity shall be the | |
8140 | specified fundamental alignment. | |
8141 | ||
8142 | * if the constant expression evaluates to an extended alignment | |
8143 | and the implementation supports that alignment in the context | |
8144 | of the declaration, the alignment of the declared entity shall | |
8145 | be that alignment | |
8146 | ||
8147 | * if the constant expression evaluates to an extended alignment | |
8148 | and the implementation does not support that alignment in the | |
8149 | context of the declaration, the program is ill-formed]. */ | |
8150 | ||
8151 | static bool | |
8152 | check_cxx_fundamental_alignment_constraints (tree node, | |
8153 | unsigned align_log, | |
8154 | int flags) | |
8155 | { | |
8156 | bool alignment_too_large_p = false; | |
8157 | unsigned requested_alignment = 1U << align_log; | |
8158 | unsigned max_align = 0; | |
8159 | ||
8160 | if ((!(flags & ATTR_FLAG_CXX11) && !warn_cxx_compat) | |
8161 | || (node == NULL_TREE || node == error_mark_node)) | |
8162 | return true; | |
8163 | ||
8164 | if (cxx_fundamental_alignment_p (requested_alignment)) | |
8165 | return true; | |
8166 | ||
8167 | if (DECL_P (node)) | |
8168 | { | |
8169 | if (TREE_STATIC (node)) | |
8170 | { | |
8171 | /* For file scope variables and static members, the target | |
8172 | supports alignments that are at most | |
8173 | MAX_OFILE_ALIGNMENT. */ | |
8174 | if (requested_alignment > (max_align = MAX_OFILE_ALIGNMENT)) | |
8175 | alignment_too_large_p = true; | |
8176 | } | |
8177 | else | |
8178 | { | |
8179 | #ifdef BIGGEST_FIELD_ALIGNMENT | |
8180 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_FIELD_ALIGNMENT | |
8181 | #else | |
8182 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_ALIGNMENT | |
8183 | #endif | |
8184 | /* For non-static members, the target supports either | |
8185 | alignments that at most either BIGGEST_FIELD_ALIGNMENT | |
8186 | if it is defined or BIGGEST_ALIGNMENT. */ | |
8187 | max_align = MAX_TARGET_FIELD_ALIGNMENT; | |
8188 | if (TREE_CODE (node) == FIELD_DECL | |
8189 | && requested_alignment > (max_align = MAX_TARGET_FIELD_ALIGNMENT)) | |
8190 | alignment_too_large_p = true; | |
8191 | #undef MAX_TARGET_FIELD_ALIGNMENT | |
8192 | /* For stack variables, the target supports at most | |
8193 | MAX_STACK_ALIGNMENT. */ | |
8194 | else if (decl_function_context (node) != NULL | |
8195 | && requested_alignment > (max_align = MAX_STACK_ALIGNMENT)) | |
8196 | alignment_too_large_p = true; | |
8197 | } | |
8198 | } | |
8199 | else if (TYPE_P (node)) | |
8200 | { | |
8201 | /* Let's be liberal for types. */ | |
8202 | if (requested_alignment > (max_align = BIGGEST_ALIGNMENT)) | |
8203 | alignment_too_large_p = true; | |
8204 | } | |
8205 | ||
8206 | if (alignment_too_large_p) | |
8207 | pedwarn (input_location, OPT_Wattributes, | |
8208 | "requested alignment %d is larger than %d", | |
8209 | requested_alignment, max_align); | |
8210 | ||
8211 | return !alignment_too_large_p; | |
8212 | } | |
8213 | ||
349ae713 NB |
8214 | /* Handle a "aligned" attribute; arguments as in |
8215 | struct attribute_spec.handler. */ | |
8216 | ||
8217 | static tree | |
e18476eb | 8218 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
a742c759 | 8219 | int flags, bool *no_add_attrs) |
349ae713 NB |
8220 | { |
8221 | tree decl = NULL_TREE; | |
8222 | tree *type = NULL; | |
8223 | int is_type = 0; | |
5d77fb19 | 8224 | tree align_expr; |
349ae713 NB |
8225 | int i; |
8226 | ||
5d77fb19 MG |
8227 | if (args) |
8228 | { | |
8229 | align_expr = TREE_VALUE (args); | |
661a0813 MP |
8230 | if (align_expr && TREE_CODE (align_expr) != IDENTIFIER_NODE |
8231 | && TREE_CODE (align_expr) != FUNCTION_DECL) | |
5d77fb19 MG |
8232 | align_expr = default_conversion (align_expr); |
8233 | } | |
8234 | else | |
8235 | align_expr = size_int (ATTRIBUTE_ALIGNED_VALUE / BITS_PER_UNIT); | |
8236 | ||
349ae713 NB |
8237 | if (DECL_P (*node)) |
8238 | { | |
8239 | decl = *node; | |
8240 | type = &TREE_TYPE (decl); | |
8241 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
8242 | } | |
8243 | else if (TYPE_P (*node)) | |
8244 | type = node, is_type = 1; | |
8245 | ||
e28d52cf DS |
8246 | if ((i = check_user_alignment (align_expr, false)) == -1 |
8247 | || !check_cxx_fundamental_alignment_constraints (*node, i, flags)) | |
d19fa6b5 | 8248 | *no_add_attrs = true; |
349ae713 NB |
8249 | else if (is_type) |
8250 | { | |
0f559c16 JM |
8251 | if ((flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
8252 | /* OK, modify the type in place. */; | |
349ae713 NB |
8253 | /* If we have a TYPE_DECL, then copy the type, so that we |
8254 | don't accidentally modify a builtin type. See pushdecl. */ | |
0f559c16 JM |
8255 | else if (decl && TREE_TYPE (decl) != error_mark_node |
8256 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
349ae713 NB |
8257 | { |
8258 | tree tt = TREE_TYPE (decl); | |
8dd16ecc | 8259 | *type = build_variant_type_copy (*type); |
349ae713 NB |
8260 | DECL_ORIGINAL_TYPE (decl) = tt; |
8261 | TYPE_NAME (*type) = decl; | |
8262 | TREE_USED (*type) = TREE_USED (decl); | |
8263 | TREE_TYPE (decl) = *type; | |
8264 | } | |
0f559c16 | 8265 | else |
8dd16ecc | 8266 | *type = build_variant_type_copy (*type); |
349ae713 | 8267 | |
d9223014 | 8268 | TYPE_ALIGN (*type) = (1U << i) * BITS_PER_UNIT; |
349ae713 NB |
8269 | TYPE_USER_ALIGN (*type) = 1; |
8270 | } | |
837edd5f | 8271 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
349ae713 NB |
8272 | && TREE_CODE (decl) != FIELD_DECL) |
8273 | { | |
dee15844 | 8274 | error ("alignment may not be specified for %q+D", decl); |
349ae713 NB |
8275 | *no_add_attrs = true; |
8276 | } | |
e28d52cf DS |
8277 | else if (DECL_USER_ALIGN (decl) |
8278 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) | |
8279 | /* C++-11 [dcl.align/4]: | |
8280 | ||
8281 | When multiple alignment-specifiers are specified for an | |
8282 | entity, the alignment requirement shall be set to the | |
8283 | strictest specified alignment. | |
8284 | ||
8285 | This formally comes from the c++11 specification but we are | |
8286 | doing it for the GNU attribute syntax as well. */ | |
8287 | *no_add_attrs = true; | |
837edd5f | 8288 | else if (TREE_CODE (decl) == FUNCTION_DECL |
d9223014 | 8289 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
837edd5f GK |
8290 | { |
8291 | if (DECL_USER_ALIGN (decl)) | |
8292 | error ("alignment for %q+D was previously specified as %d " | |
8293 | "and may not be decreased", decl, | |
8294 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
8295 | else | |
8296 | error ("alignment for %q+D must be at least %d", decl, | |
8297 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
8298 | *no_add_attrs = true; | |
8299 | } | |
349ae713 NB |
8300 | else |
8301 | { | |
d9223014 | 8302 | DECL_ALIGN (decl) = (1U << i) * BITS_PER_UNIT; |
349ae713 NB |
8303 | DECL_USER_ALIGN (decl) = 1; |
8304 | } | |
8305 | ||
8306 | return NULL_TREE; | |
8307 | } | |
8308 | ||
8309 | /* Handle a "weak" attribute; arguments as in | |
8310 | struct attribute_spec.handler. */ | |
8311 | ||
8312 | static tree | |
55af93a8 | 8313 | handle_weak_attribute (tree *node, tree name, |
e18476eb BI |
8314 | tree ARG_UNUSED (args), |
8315 | int ARG_UNUSED (flags), | |
8316 | bool * ARG_UNUSED (no_add_attrs)) | |
349ae713 | 8317 | { |
55af93a8 | 8318 | if (TREE_CODE (*node) == FUNCTION_DECL |
6b4e94bc RG |
8319 | && DECL_DECLARED_INLINE_P (*node)) |
8320 | { | |
2aa9c6ae | 8321 | warning (OPT_Wattributes, "inline function %q+D declared weak", *node); |
6b4e94bc RG |
8322 | *no_add_attrs = true; |
8323 | } | |
ba885ec5 NS |
8324 | else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
8325 | { | |
8326 | error ("indirect function %q+D cannot be declared weak", *node); | |
8327 | *no_add_attrs = true; | |
8328 | return NULL_TREE; | |
8329 | } | |
21b634ae | 8330 | else if (VAR_OR_FUNCTION_DECL_P (*node)) |
c316b5e4 | 8331 | declare_weak (*node); |
55af93a8 DS |
8332 | else |
8333 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
8334 | |
8335 | return NULL_TREE; | |
8336 | } | |
8337 | ||
4bb794e2 ST |
8338 | /* Handle a "noplt" attribute; arguments as in |
8339 | struct attribute_spec.handler. */ | |
8340 | ||
8341 | static tree | |
8342 | handle_noplt_attribute (tree *node, tree name, | |
8343 | tree ARG_UNUSED (args), | |
8344 | int ARG_UNUSED (flags), | |
8345 | bool * ARG_UNUSED (no_add_attrs)) | |
8346 | { | |
8347 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8348 | { | |
8349 | warning (OPT_Wattributes, | |
8350 | "%qE attribute is only applicable on functions", name); | |
8351 | *no_add_attrs = true; | |
8352 | return NULL_TREE; | |
8353 | } | |
8354 | return NULL_TREE; | |
8355 | } | |
8356 | ||
ba885ec5 NS |
8357 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
8358 | struct attribute_spec.handler, except that IS_ALIAS tells us | |
8359 | whether this is an alias as opposed to ifunc attribute. */ | |
349ae713 NB |
8360 | |
8361 | static tree | |
ba885ec5 NS |
8362 | handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args, |
8363 | bool *no_add_attrs) | |
349ae713 NB |
8364 | { |
8365 | tree decl = *node; | |
8366 | ||
ba885ec5 | 8367 | if (TREE_CODE (decl) != FUNCTION_DECL |
0ae9bd27 | 8368 | && (!is_alias || !VAR_P (decl))) |
feab5a67 JM |
8369 | { |
8370 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8371 | *no_add_attrs = true; | |
8372 | } | |
8373 | else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
b8698a0f | 8374 | || (TREE_CODE (decl) != FUNCTION_DECL |
a9b0b825 GK |
8375 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) |
8376 | /* A static variable declaration is always a tentative definition, | |
8377 | but the alias is a non-tentative definition which overrides. */ | |
b8698a0f | 8378 | || (TREE_CODE (decl) != FUNCTION_DECL |
a9b0b825 | 8379 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) |
349ae713 | 8380 | { |
ba885ec5 | 8381 | error ("%q+D defined both normally and as %qE attribute", decl, name); |
349ae713 | 8382 | *no_add_attrs = true; |
ba885ec5 | 8383 | return NULL_TREE; |
349ae713 | 8384 | } |
ba885ec5 NS |
8385 | else if (!is_alias |
8386 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) | |
8387 | || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))) | |
8388 | { | |
8389 | error ("weak %q+D cannot be defined %qE", decl, name); | |
8390 | *no_add_attrs = true; | |
8391 | return NULL_TREE; | |
8392 | } | |
f6a76b9f RH |
8393 | |
8394 | /* Note that the very first time we process a nested declaration, | |
8395 | decl_function_context will not be set. Indeed, *would* never | |
8396 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
8397 | we do below. After such frobbery, pushdecl would set the context. | |
8398 | In any case, this is never what we want. */ | |
8399 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
349ae713 NB |
8400 | { |
8401 | tree id; | |
8402 | ||
8403 | id = TREE_VALUE (args); | |
8404 | if (TREE_CODE (id) != STRING_CST) | |
8405 | { | |
ba885ec5 | 8406 | error ("attribute %qE argument not a string", name); |
349ae713 NB |
8407 | *no_add_attrs = true; |
8408 | return NULL_TREE; | |
8409 | } | |
8410 | id = get_identifier (TREE_STRING_POINTER (id)); | |
8411 | /* This counts as a use of the object pointed to. */ | |
8412 | TREE_USED (id) = 1; | |
8413 | ||
8414 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
8415 | DECL_INITIAL (decl) = error_mark_node; | |
8416 | else | |
08346abd | 8417 | TREE_STATIC (decl) = 1; |
ba885ec5 NS |
8418 | |
8419 | if (!is_alias) | |
8420 | /* ifuncs are also aliases, so set that attribute too. */ | |
8421 | DECL_ATTRIBUTES (decl) | |
8422 | = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl)); | |
349ae713 NB |
8423 | } |
8424 | else | |
8425 | { | |
5c498b10 | 8426 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
8427 | *no_add_attrs = true; |
8428 | } | |
8429 | ||
f7217cde JH |
8430 | if (decl_in_symtab_p (*node)) |
8431 | { | |
8432 | struct symtab_node *n = symtab_node::get (decl); | |
8433 | if (n && n->refuse_visibility_changes) | |
8434 | { | |
8435 | if (is_alias) | |
8436 | error ("%+D declared alias after being used", decl); | |
8437 | else | |
8438 | error ("%+D declared ifunc after being used", decl); | |
8439 | } | |
8440 | } | |
8441 | ||
8442 | ||
349ae713 NB |
8443 | return NULL_TREE; |
8444 | } | |
8445 | ||
ba885ec5 NS |
8446 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
8447 | struct attribute_spec.handler. */ | |
8448 | ||
8449 | static tree | |
8450 | handle_ifunc_attribute (tree *node, tree name, tree args, | |
8451 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8452 | { | |
8453 | return handle_alias_ifunc_attribute (false, node, name, args, no_add_attrs); | |
8454 | } | |
8455 | ||
8456 | /* Handle an "alias" or "ifunc" attribute; arguments as in | |
8457 | struct attribute_spec.handler. */ | |
8458 | ||
8459 | static tree | |
8460 | handle_alias_attribute (tree *node, tree name, tree args, | |
8461 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8462 | { | |
8463 | return handle_alias_ifunc_attribute (true, node, name, args, no_add_attrs); | |
8464 | } | |
8465 | ||
a0203ca7 AO |
8466 | /* Handle a "weakref" attribute; arguments as in struct |
8467 | attribute_spec.handler. */ | |
8468 | ||
8469 | static tree | |
8470 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
8471 | int flags, bool *no_add_attrs) | |
8472 | { | |
8473 | tree attr = NULL_TREE; | |
8474 | ||
e1cf56b1 AO |
8475 | /* We must ignore the attribute when it is associated with |
8476 | local-scoped decls, since attribute alias is ignored and many | |
8477 | such symbols do not even have a DECL_WEAK field. */ | |
e7b012c0 JJ |
8478 | if (decl_function_context (*node) |
8479 | || current_function_decl | |
21b634ae | 8480 | || !VAR_OR_FUNCTION_DECL_P (*node)) |
e1cf56b1 AO |
8481 | { |
8482 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8483 | *no_add_attrs = true; | |
8484 | return NULL_TREE; | |
8485 | } | |
8486 | ||
ba885ec5 NS |
8487 | if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
8488 | { | |
8489 | error ("indirect function %q+D cannot be declared weakref", *node); | |
8490 | *no_add_attrs = true; | |
8491 | return NULL_TREE; | |
8492 | } | |
8493 | ||
a0203ca7 AO |
8494 | /* The idea here is that `weakref("name")' mutates into `weakref, |
8495 | alias("name")', and weakref without arguments, in turn, | |
8496 | implicitly adds weak. */ | |
8497 | ||
8498 | if (args) | |
8499 | { | |
8500 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
8501 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
8502 | ||
8503 | *no_add_attrs = true; | |
a9b0b825 GK |
8504 | |
8505 | decl_attributes (node, attr, flags); | |
a0203ca7 AO |
8506 | } |
8507 | else | |
8508 | { | |
8509 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
c5d75364 MLI |
8510 | error_at (DECL_SOURCE_LOCATION (*node), |
8511 | "weakref attribute must appear before alias attribute"); | |
a0203ca7 | 8512 | |
a9b0b825 GK |
8513 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
8514 | and that isn't supported; and because it wants to add it to | |
8515 | the list of weak decls, which isn't helpful. */ | |
8516 | DECL_WEAK (*node) = 1; | |
a0203ca7 AO |
8517 | } |
8518 | ||
f7217cde JH |
8519 | if (decl_in_symtab_p (*node)) |
8520 | { | |
8521 | struct symtab_node *n = symtab_node::get (*node); | |
8522 | if (n && n->refuse_visibility_changes) | |
8523 | error ("%+D declared weakref after being used", *node); | |
8524 | } | |
8525 | ||
a0203ca7 AO |
8526 | return NULL_TREE; |
8527 | } | |
8528 | ||
349ae713 NB |
8529 | /* Handle an "visibility" attribute; arguments as in |
8530 | struct attribute_spec.handler. */ | |
8531 | ||
8532 | static tree | |
35b1a6fa | 8533 | handle_visibility_attribute (tree *node, tree name, tree args, |
e18476eb | 8534 | int ARG_UNUSED (flags), |
b9e75696 | 8535 | bool *ARG_UNUSED (no_add_attrs)) |
349ae713 NB |
8536 | { |
8537 | tree decl = *node; | |
968b41a1 | 8538 | tree id = TREE_VALUE (args); |
b9e75696 | 8539 | enum symbol_visibility vis; |
349ae713 | 8540 | |
d7afec4b ND |
8541 | if (TYPE_P (*node)) |
8542 | { | |
b9e75696 JM |
8543 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
8544 | /* OK */; | |
8545 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
8546 | { | |
8547 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
8548 | name); | |
8549 | return NULL_TREE; | |
8550 | } | |
8551 | else if (TYPE_FIELDS (*node)) | |
8552 | { | |
8553 | error ("%qE attribute ignored because %qT is already defined", | |
8554 | name, *node); | |
8555 | return NULL_TREE; | |
8556 | } | |
d7afec4b | 8557 | } |
3f75a254 | 8558 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
349ae713 | 8559 | { |
5c498b10 | 8560 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
968b41a1 | 8561 | return NULL_TREE; |
349ae713 | 8562 | } |
349ae713 | 8563 | |
968b41a1 MA |
8564 | if (TREE_CODE (id) != STRING_CST) |
8565 | { | |
40b97a2e | 8566 | error ("visibility argument not a string"); |
968b41a1 | 8567 | return NULL_TREE; |
349ae713 | 8568 | } |
9f63daea | 8569 | |
d7afec4b ND |
8570 | /* If this is a type, set the visibility on the type decl. */ |
8571 | if (TYPE_P (decl)) | |
8572 | { | |
8573 | decl = TYPE_NAME (decl); | |
3f75a254 | 8574 | if (!decl) |
c22cacf3 | 8575 | return NULL_TREE; |
e8233ac2 AP |
8576 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
8577 | { | |
5c498b10 | 8578 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e8233ac2 AP |
8579 | name); |
8580 | return NULL_TREE; | |
8581 | } | |
d7afec4b | 8582 | } |
349ae713 | 8583 | |
968b41a1 | 8584 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
b9e75696 | 8585 | vis = VISIBILITY_DEFAULT; |
968b41a1 | 8586 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
b9e75696 | 8587 | vis = VISIBILITY_INTERNAL; |
968b41a1 | 8588 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
b9e75696 | 8589 | vis = VISIBILITY_HIDDEN; |
968b41a1 | 8590 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
b9e75696 | 8591 | vis = VISIBILITY_PROTECTED; |
968b41a1 | 8592 | else |
b9e75696 JM |
8593 | { |
8594 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
8595 | vis = VISIBILITY_DEFAULT; | |
8596 | } | |
8597 | ||
8598 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
3a687f8b MM |
8599 | && vis != DECL_VISIBILITY (decl)) |
8600 | { | |
8601 | tree attributes = (TYPE_P (*node) | |
8602 | ? TYPE_ATTRIBUTES (*node) | |
8603 | : DECL_ATTRIBUTES (decl)); | |
8604 | if (lookup_attribute ("visibility", attributes)) | |
8605 | error ("%qD redeclared with different visibility", decl); | |
8606 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8607 | && lookup_attribute ("dllimport", attributes)) | |
8608 | error ("%qD was declared %qs which implies default visibility", | |
8609 | decl, "dllimport"); | |
8610 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8611 | && lookup_attribute ("dllexport", attributes)) | |
8612 | error ("%qD was declared %qs which implies default visibility", | |
8613 | decl, "dllexport"); | |
8614 | } | |
b9e75696 JM |
8615 | |
8616 | DECL_VISIBILITY (decl) = vis; | |
d7afec4b ND |
8617 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
8618 | ||
b9e75696 JM |
8619 | /* Go ahead and attach the attribute to the node as well. This is needed |
8620 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
8621 | visibility was not specified, or because it was explicitly overridden | |
8622 | from the containing scope. */ | |
968b41a1 | 8623 | |
349ae713 NB |
8624 | return NULL_TREE; |
8625 | } | |
8626 | ||
b2ca3702 MM |
8627 | /* Determine the ELF symbol visibility for DECL, which is either a |
8628 | variable or a function. It is an error to use this function if a | |
8629 | definition of DECL is not available in this translation unit. | |
8630 | Returns true if the final visibility has been determined by this | |
8631 | function; false if the caller is free to make additional | |
8632 | modifications. */ | |
8633 | ||
8634 | bool | |
8635 | c_determine_visibility (tree decl) | |
8636 | { | |
21b634ae | 8637 | gcc_assert (VAR_OR_FUNCTION_DECL_P (decl)); |
b2ca3702 MM |
8638 | |
8639 | /* If the user explicitly specified the visibility with an | |
8640 | attribute, honor that. DECL_VISIBILITY will have been set during | |
6d87092d JM |
8641 | the processing of the attribute. We check for an explicit |
8642 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
8643 | to distinguish the use of an attribute from the use of a "#pragma | |
8644 | GCC visibility push(...)"; in the latter case we still want other | |
8645 | considerations to be able to overrule the #pragma. */ | |
8646 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) | |
8647 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8648 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
8649 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
b2ca3702 MM |
8650 | return true; |
8651 | ||
b9e75696 JM |
8652 | /* Set default visibility to whatever the user supplied with |
8653 | visibility_specified depending on #pragma GCC visibility. */ | |
8654 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
8655 | { | |
09812622 JJ |
8656 | if (visibility_options.inpragma |
8657 | || DECL_VISIBILITY (decl) != default_visibility) | |
8658 | { | |
8659 | DECL_VISIBILITY (decl) = default_visibility; | |
8660 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
8661 | /* If visibility changed and DECL already has DECL_RTL, ensure | |
8662 | symbol flags are updated. */ | |
0ae9bd27 | 8663 | if (((VAR_P (decl) && TREE_STATIC (decl)) |
09812622 JJ |
8664 | || TREE_CODE (decl) == FUNCTION_DECL) |
8665 | && DECL_RTL_SET_P (decl)) | |
8666 | make_decl_rtl (decl); | |
8667 | } | |
b9e75696 | 8668 | } |
b2ca3702 MM |
8669 | return false; |
8670 | } | |
8671 | ||
dce81a1a JJ |
8672 | /* Handle an "tls_model" attribute; arguments as in |
8673 | struct attribute_spec.handler. */ | |
8674 | ||
8675 | static tree | |
35b1a6fa | 8676 | handle_tls_model_attribute (tree *node, tree name, tree args, |
e18476eb | 8677 | int ARG_UNUSED (flags), bool *no_add_attrs) |
dce81a1a | 8678 | { |
c2f7fa15 | 8679 | tree id; |
dce81a1a | 8680 | tree decl = *node; |
c2f7fa15 | 8681 | enum tls_model kind; |
dce81a1a | 8682 | |
c2f7fa15 SB |
8683 | *no_add_attrs = true; |
8684 | ||
0ae9bd27 | 8685 | if (!VAR_P (decl) || !DECL_THREAD_LOCAL_P (decl)) |
dce81a1a | 8686 | { |
5c498b10 | 8687 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
c2f7fa15 | 8688 | return NULL_TREE; |
dce81a1a | 8689 | } |
dce81a1a | 8690 | |
c2f7fa15 SB |
8691 | kind = DECL_TLS_MODEL (decl); |
8692 | id = TREE_VALUE (args); | |
8693 | if (TREE_CODE (id) != STRING_CST) | |
8694 | { | |
8695 | error ("tls_model argument not a string"); | |
8696 | return NULL_TREE; | |
dce81a1a JJ |
8697 | } |
8698 | ||
c2f7fa15 SB |
8699 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
8700 | kind = TLS_MODEL_LOCAL_EXEC; | |
8701 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
8702 | kind = TLS_MODEL_INITIAL_EXEC; | |
8703 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
8704 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
8705 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
8706 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
8707 | else | |
8708 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
8709 | ||
56363ffd | 8710 | set_decl_tls_model (decl, kind); |
dce81a1a JJ |
8711 | return NULL_TREE; |
8712 | } | |
8713 | ||
349ae713 NB |
8714 | /* Handle a "no_instrument_function" attribute; arguments as in |
8715 | struct attribute_spec.handler. */ | |
8716 | ||
8717 | static tree | |
35b1a6fa | 8718 | handle_no_instrument_function_attribute (tree *node, tree name, |
e18476eb BI |
8719 | tree ARG_UNUSED (args), |
8720 | int ARG_UNUSED (flags), | |
a742c759 | 8721 | bool *no_add_attrs) |
349ae713 NB |
8722 | { |
8723 | tree decl = *node; | |
8724 | ||
8725 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8726 | { | |
c5d75364 MLI |
8727 | error_at (DECL_SOURCE_LOCATION (decl), |
8728 | "%qE attribute applies only to functions", name); | |
349ae713 NB |
8729 | *no_add_attrs = true; |
8730 | } | |
349ae713 NB |
8731 | else |
8732 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
8733 | ||
8734 | return NULL_TREE; | |
8735 | } | |
8736 | ||
8737 | /* Handle a "malloc" attribute; arguments as in | |
8738 | struct attribute_spec.handler. */ | |
8739 | ||
8740 | static tree | |
e18476eb BI |
8741 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8742 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 8743 | { |
3425638a JM |
8744 | if (TREE_CODE (*node) == FUNCTION_DECL |
8745 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
349ae713 | 8746 | DECL_IS_MALLOC (*node) = 1; |
349ae713 NB |
8747 | else |
8748 | { | |
5c498b10 | 8749 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
8750 | *no_add_attrs = true; |
8751 | } | |
8752 | ||
8753 | return NULL_TREE; | |
8754 | } | |
8755 | ||
51bc54a6 DM |
8756 | /* Handle a "alloc_size" attribute; arguments as in |
8757 | struct attribute_spec.handler. */ | |
8758 | ||
8759 | static tree | |
8760 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
8761 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8762 | { | |
f3f75f69 | 8763 | unsigned arg_count = type_num_arguments (*node); |
51bc54a6 DM |
8764 | for (; args; args = TREE_CHAIN (args)) |
8765 | { | |
8766 | tree position = TREE_VALUE (args); | |
5d77fb19 MG |
8767 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
8768 | && TREE_CODE (position) != FUNCTION_DECL) | |
8769 | position = default_conversion (position); | |
51bc54a6 | 8770 | |
8fcbce72 JJ |
8771 | if (!tree_fits_uhwi_p (position) |
8772 | || !arg_count | |
8773 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
51bc54a6 | 8774 | { |
b8698a0f | 8775 | warning (OPT_Wattributes, |
51bc54a6 DM |
8776 | "alloc_size parameter outside range"); |
8777 | *no_add_attrs = true; | |
8778 | return NULL_TREE; | |
8779 | } | |
8780 | } | |
8781 | return NULL_TREE; | |
8782 | } | |
8783 | ||
8fcbce72 JJ |
8784 | /* Handle a "alloc_align" attribute; arguments as in |
8785 | struct attribute_spec.handler. */ | |
8786 | ||
8787 | static tree | |
8788 | handle_alloc_align_attribute (tree *node, tree, tree args, int, | |
8789 | bool *no_add_attrs) | |
8790 | { | |
8791 | unsigned arg_count = type_num_arguments (*node); | |
8792 | tree position = TREE_VALUE (args); | |
8793 | if (position && TREE_CODE (position) != IDENTIFIER_NODE) | |
8794 | position = default_conversion (position); | |
8795 | ||
8796 | if (!tree_fits_uhwi_p (position) | |
8797 | || !arg_count | |
8798 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
8799 | { | |
8800 | warning (OPT_Wattributes, | |
8801 | "alloc_align parameter outside range"); | |
8802 | *no_add_attrs = true; | |
8803 | return NULL_TREE; | |
8804 | } | |
8805 | return NULL_TREE; | |
8806 | } | |
8807 | ||
8808 | /* Handle a "assume_aligned" attribute; arguments as in | |
8809 | struct attribute_spec.handler. */ | |
8810 | ||
8811 | static tree | |
8812 | handle_assume_aligned_attribute (tree *, tree, tree args, int, | |
8813 | bool *no_add_attrs) | |
8814 | { | |
8815 | for (; args; args = TREE_CHAIN (args)) | |
8816 | { | |
8817 | tree position = TREE_VALUE (args); | |
8818 | if (position && TREE_CODE (position) != IDENTIFIER_NODE | |
8819 | && TREE_CODE (position) != FUNCTION_DECL) | |
8820 | position = default_conversion (position); | |
8821 | ||
8822 | if (TREE_CODE (position) != INTEGER_CST) | |
8823 | { | |
8824 | warning (OPT_Wattributes, | |
8825 | "assume_aligned parameter not integer constant"); | |
8826 | *no_add_attrs = true; | |
8827 | return NULL_TREE; | |
8828 | } | |
8829 | } | |
8830 | return NULL_TREE; | |
8831 | } | |
8832 | ||
0b7b376d RG |
8833 | /* Handle a "fn spec" attribute; arguments as in |
8834 | struct attribute_spec.handler. */ | |
8835 | ||
8836 | static tree | |
8837 | handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), | |
8838 | tree args, int ARG_UNUSED (flags), | |
8839 | bool *no_add_attrs ATTRIBUTE_UNUSED) | |
8840 | { | |
8841 | gcc_assert (args | |
8842 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST | |
8843 | && !TREE_CHAIN (args)); | |
8844 | return NULL_TREE; | |
8845 | } | |
8846 | ||
d5e254e1 IE |
8847 | /* Handle a "bnd_variable_size" attribute; arguments as in |
8848 | struct attribute_spec.handler. */ | |
8849 | ||
8850 | static tree | |
8851 | handle_bnd_variable_size_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
8852 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8853 | { | |
8854 | if (TREE_CODE (*node) != FIELD_DECL) | |
8855 | { | |
8856 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8857 | *no_add_attrs = true; | |
8858 | } | |
8859 | ||
8860 | return NULL_TREE; | |
8861 | } | |
8862 | ||
8863 | /* Handle a "bnd_legacy" attribute; arguments as in | |
8864 | struct attribute_spec.handler. */ | |
8865 | ||
8866 | static tree | |
8867 | handle_bnd_legacy (tree *node, tree name, tree ARG_UNUSED (args), | |
8868 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8869 | { | |
8870 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8871 | { | |
8872 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8873 | *no_add_attrs = true; | |
8874 | } | |
8875 | ||
8876 | return NULL_TREE; | |
8877 | } | |
8878 | ||
8879 | /* Handle a "bnd_instrument" attribute; arguments as in | |
8880 | struct attribute_spec.handler. */ | |
8881 | ||
8882 | static tree | |
8883 | handle_bnd_instrument (tree *node, tree name, tree ARG_UNUSED (args), | |
8884 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8885 | { | |
8886 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8887 | { | |
8888 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8889 | *no_add_attrs = true; | |
8890 | } | |
8891 | ||
8892 | return NULL_TREE; | |
8893 | } | |
8894 | ||
2a99e5e6 LL |
8895 | /* Handle a "warn_unused" attribute; arguments as in |
8896 | struct attribute_spec.handler. */ | |
8897 | ||
8898 | static tree | |
8899 | handle_warn_unused_attribute (tree *node, tree name, | |
8900 | tree args ATTRIBUTE_UNUSED, | |
8901 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
8902 | { | |
8903 | if (TYPE_P (*node)) | |
8904 | /* Do nothing else, just set the attribute. We'll get at | |
8905 | it later with lookup_attribute. */ | |
8906 | ; | |
8907 | else | |
8908 | { | |
8909 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8910 | *no_add_attrs = true; | |
8911 | } | |
8912 | ||
8913 | return NULL_TREE; | |
8914 | } | |
8915 | ||
acf0174b JJ |
8916 | /* Handle an "omp declare simd" attribute; arguments as in |
8917 | struct attribute_spec.handler. */ | |
8918 | ||
8919 | static tree | |
8920 | handle_omp_declare_simd_attribute (tree *, tree, tree, int, bool *) | |
8921 | { | |
8922 | return NULL_TREE; | |
8923 | } | |
8924 | ||
8925 | /* Handle an "omp declare target" attribute; arguments as in | |
8926 | struct attribute_spec.handler. */ | |
8927 | ||
8928 | static tree | |
8929 | handle_omp_declare_target_attribute (tree *, tree, tree, int, bool *) | |
8930 | { | |
8931 | return NULL_TREE; | |
8932 | } | |
8933 | ||
6e9a3221 AN |
8934 | /* Handle a "returns_twice" attribute; arguments as in |
8935 | struct attribute_spec.handler. */ | |
8936 | ||
8937 | static tree | |
8938 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
8939 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8940 | { | |
8941 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
8942 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
8943 | else | |
8944 | { | |
5c498b10 | 8945 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
6e9a3221 AN |
8946 | *no_add_attrs = true; |
8947 | } | |
8948 | ||
8949 | return NULL_TREE; | |
8950 | } | |
8951 | ||
349ae713 NB |
8952 | /* Handle a "no_limit_stack" attribute; arguments as in |
8953 | struct attribute_spec.handler. */ | |
8954 | ||
8955 | static tree | |
35b1a6fa | 8956 | handle_no_limit_stack_attribute (tree *node, tree name, |
e18476eb BI |
8957 | tree ARG_UNUSED (args), |
8958 | int ARG_UNUSED (flags), | |
a742c759 | 8959 | bool *no_add_attrs) |
349ae713 NB |
8960 | { |
8961 | tree decl = *node; | |
8962 | ||
8963 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8964 | { | |
c5d75364 MLI |
8965 | error_at (DECL_SOURCE_LOCATION (decl), |
8966 | "%qE attribute applies only to functions", name); | |
349ae713 NB |
8967 | *no_add_attrs = true; |
8968 | } | |
8969 | else if (DECL_INITIAL (decl)) | |
8970 | { | |
c5d75364 MLI |
8971 | error_at (DECL_SOURCE_LOCATION (decl), |
8972 | "can%'t set %qE attribute after definition", name); | |
349ae713 NB |
8973 | *no_add_attrs = true; |
8974 | } | |
8975 | else | |
8976 | DECL_NO_LIMIT_STACK (decl) = 1; | |
8977 | ||
8978 | return NULL_TREE; | |
8979 | } | |
8980 | ||
8981 | /* Handle a "pure" attribute; arguments as in | |
8982 | struct attribute_spec.handler. */ | |
8983 | ||
8984 | static tree | |
e18476eb BI |
8985 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8986 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
8987 | { |
8988 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
becfd6e5 | 8989 | DECL_PURE_P (*node) = 1; |
349ae713 NB |
8990 | /* ??? TODO: Support types. */ |
8991 | else | |
8992 | { | |
5c498b10 | 8993 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
8994 | *no_add_attrs = true; |
8995 | } | |
8996 | ||
8997 | return NULL_TREE; | |
8998 | } | |
8999 | ||
0a35513e AH |
9000 | /* Digest an attribute list destined for a transactional memory statement. |
9001 | ALLOWED is the set of attributes that are allowed for this statement; | |
9002 | return the attribute we parsed. Multiple attributes are never allowed. */ | |
9003 | ||
9004 | int | |
9005 | parse_tm_stmt_attr (tree attrs, int allowed) | |
9006 | { | |
9007 | tree a_seen = NULL; | |
9008 | int m_seen = 0; | |
9009 | ||
9010 | for ( ; attrs ; attrs = TREE_CHAIN (attrs)) | |
9011 | { | |
9012 | tree a = TREE_PURPOSE (attrs); | |
9013 | int m = 0; | |
9014 | ||
9015 | if (is_attribute_p ("outer", a)) | |
9016 | m = TM_STMT_ATTR_OUTER; | |
9017 | ||
9018 | if ((m & allowed) == 0) | |
9019 | { | |
9020 | warning (OPT_Wattributes, "%qE attribute directive ignored", a); | |
9021 | continue; | |
9022 | } | |
9023 | ||
9024 | if (m_seen == 0) | |
9025 | { | |
9026 | a_seen = a; | |
9027 | m_seen = m; | |
9028 | } | |
9029 | else if (m_seen == m) | |
9030 | warning (OPT_Wattributes, "%qE attribute duplicated", a); | |
9031 | else | |
9032 | warning (OPT_Wattributes, "%qE attribute follows %qE", a, a_seen); | |
9033 | } | |
9034 | ||
9035 | return m_seen; | |
9036 | } | |
9037 | ||
9038 | /* Transform a TM attribute name into a maskable integer and back. | |
9039 | Note that NULL (i.e. no attribute) is mapped to UNKNOWN, corresponding | |
9040 | to how the lack of an attribute is treated. */ | |
9041 | ||
9042 | int | |
9043 | tm_attr_to_mask (tree attr) | |
9044 | { | |
9045 | if (attr == NULL) | |
9046 | return 0; | |
9047 | if (is_attribute_p ("transaction_safe", attr)) | |
9048 | return TM_ATTR_SAFE; | |
9049 | if (is_attribute_p ("transaction_callable", attr)) | |
9050 | return TM_ATTR_CALLABLE; | |
9051 | if (is_attribute_p ("transaction_pure", attr)) | |
9052 | return TM_ATTR_PURE; | |
9053 | if (is_attribute_p ("transaction_unsafe", attr)) | |
9054 | return TM_ATTR_IRREVOCABLE; | |
9055 | if (is_attribute_p ("transaction_may_cancel_outer", attr)) | |
9056 | return TM_ATTR_MAY_CANCEL_OUTER; | |
9057 | return 0; | |
9058 | } | |
9059 | ||
9060 | tree | |
9061 | tm_mask_to_attr (int mask) | |
9062 | { | |
9063 | const char *str; | |
9064 | switch (mask) | |
9065 | { | |
9066 | case TM_ATTR_SAFE: | |
9067 | str = "transaction_safe"; | |
9068 | break; | |
9069 | case TM_ATTR_CALLABLE: | |
9070 | str = "transaction_callable"; | |
9071 | break; | |
9072 | case TM_ATTR_PURE: | |
9073 | str = "transaction_pure"; | |
9074 | break; | |
9075 | case TM_ATTR_IRREVOCABLE: | |
9076 | str = "transaction_unsafe"; | |
9077 | break; | |
9078 | case TM_ATTR_MAY_CANCEL_OUTER: | |
9079 | str = "transaction_may_cancel_outer"; | |
9080 | break; | |
9081 | default: | |
9082 | gcc_unreachable (); | |
9083 | } | |
9084 | return get_identifier (str); | |
9085 | } | |
9086 | ||
9087 | /* Return the first TM attribute seen in LIST. */ | |
9088 | ||
9089 | tree | |
9090 | find_tm_attribute (tree list) | |
9091 | { | |
9092 | for (; list ; list = TREE_CHAIN (list)) | |
9093 | { | |
9094 | tree name = TREE_PURPOSE (list); | |
9095 | if (tm_attr_to_mask (name) != 0) | |
9096 | return name; | |
9097 | } | |
9098 | return NULL_TREE; | |
9099 | } | |
9100 | ||
9101 | /* Handle the TM attributes; arguments as in struct attribute_spec.handler. | |
9102 | Here we accept only function types, and verify that none of the other | |
9103 | function TM attributes are also applied. */ | |
9104 | /* ??? We need to accept class types for C++, but not C. This greatly | |
9105 | complicates this function, since we can no longer rely on the extra | |
9106 | processing given by function_type_required. */ | |
9107 | ||
9108 | static tree | |
9109 | handle_tm_attribute (tree *node, tree name, tree args, | |
9110 | int flags, bool *no_add_attrs) | |
9111 | { | |
9112 | /* Only one path adds the attribute; others don't. */ | |
9113 | *no_add_attrs = true; | |
9114 | ||
9115 | switch (TREE_CODE (*node)) | |
9116 | { | |
9117 | case RECORD_TYPE: | |
9118 | case UNION_TYPE: | |
9119 | /* Only tm_callable and tm_safe apply to classes. */ | |
9120 | if (tm_attr_to_mask (name) & ~(TM_ATTR_SAFE | TM_ATTR_CALLABLE)) | |
9121 | goto ignored; | |
9122 | /* FALLTHRU */ | |
9123 | ||
9124 | case FUNCTION_TYPE: | |
9125 | case METHOD_TYPE: | |
9126 | { | |
9127 | tree old_name = find_tm_attribute (TYPE_ATTRIBUTES (*node)); | |
9128 | if (old_name == name) | |
9129 | ; | |
9130 | else if (old_name != NULL_TREE) | |
9131 | error ("type was previously declared %qE", old_name); | |
9132 | else | |
9133 | *no_add_attrs = false; | |
9134 | } | |
9135 | break; | |
9136 | ||
9137 | case POINTER_TYPE: | |
9138 | { | |
9139 | enum tree_code subcode = TREE_CODE (TREE_TYPE (*node)); | |
9140 | if (subcode == FUNCTION_TYPE || subcode == METHOD_TYPE) | |
9141 | { | |
9142 | tree fn_tmp = TREE_TYPE (*node); | |
9143 | decl_attributes (&fn_tmp, tree_cons (name, args, NULL), 0); | |
9144 | *node = build_pointer_type (fn_tmp); | |
9145 | break; | |
9146 | } | |
9147 | } | |
9148 | /* FALLTHRU */ | |
9149 | ||
9150 | default: | |
9151 | /* If a function is next, pass it on to be tried next. */ | |
9152 | if (flags & (int) ATTR_FLAG_FUNCTION_NEXT) | |
9153 | return tree_cons (name, args, NULL); | |
9154 | ||
9155 | ignored: | |
9156 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9157 | break; | |
9158 | } | |
9159 | ||
9160 | return NULL_TREE; | |
9161 | } | |
9162 | ||
9163 | /* Handle the TM_WRAP attribute; arguments as in | |
9164 | struct attribute_spec.handler. */ | |
9165 | ||
9166 | static tree | |
9167 | handle_tm_wrap_attribute (tree *node, tree name, tree args, | |
9168 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
9169 | { | |
9170 | tree decl = *node; | |
9171 | ||
9172 | /* We don't need the attribute even on success, since we | |
9173 | record the entry in an external table. */ | |
9174 | *no_add_attrs = true; | |
9175 | ||
9176 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
9177 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9178 | else | |
9179 | { | |
9180 | tree wrap_decl = TREE_VALUE (args); | |
661a0813 MP |
9181 | if (error_operand_p (wrap_decl)) |
9182 | ; | |
9183 | else if (TREE_CODE (wrap_decl) != IDENTIFIER_NODE | |
21b634ae | 9184 | && !VAR_OR_FUNCTION_DECL_P (wrap_decl)) |
0a35513e AH |
9185 | error ("%qE argument not an identifier", name); |
9186 | else | |
9187 | { | |
9188 | if (TREE_CODE (wrap_decl) == IDENTIFIER_NODE) | |
9189 | wrap_decl = lookup_name (wrap_decl); | |
9190 | if (wrap_decl && TREE_CODE (wrap_decl) == FUNCTION_DECL) | |
9191 | { | |
9192 | if (lang_hooks.types_compatible_p (TREE_TYPE (decl), | |
9193 | TREE_TYPE (wrap_decl))) | |
9194 | record_tm_replacement (wrap_decl, decl); | |
9195 | else | |
9196 | error ("%qD is not compatible with %qD", wrap_decl, decl); | |
9197 | } | |
9198 | else | |
c07d7c02 | 9199 | error ("%qE argument is not a function", name); |
0a35513e AH |
9200 | } |
9201 | } | |
9202 | ||
9203 | return NULL_TREE; | |
9204 | } | |
9205 | ||
9206 | /* Ignore the given attribute. Used when this attribute may be usefully | |
9207 | overridden by the target, but is not used generically. */ | |
9208 | ||
9209 | static tree | |
9210 | ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name), | |
9211 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9212 | bool *no_add_attrs) | |
9213 | { | |
9214 | *no_add_attrs = true; | |
9215 | return NULL_TREE; | |
9216 | } | |
9217 | ||
dcd6de6d ZD |
9218 | /* Handle a "no vops" attribute; arguments as in |
9219 | struct attribute_spec.handler. */ | |
9220 | ||
9221 | static tree | |
9222 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
9223 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9224 | bool *ARG_UNUSED (no_add_attrs)) | |
9225 | { | |
9226 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
9227 | DECL_IS_NOVOPS (*node) = 1; | |
9228 | return NULL_TREE; | |
9229 | } | |
9230 | ||
349ae713 NB |
9231 | /* Handle a "deprecated" attribute; arguments as in |
9232 | struct attribute_spec.handler. */ | |
35b1a6fa | 9233 | |
349ae713 | 9234 | static tree |
35b1a6fa | 9235 | handle_deprecated_attribute (tree *node, tree name, |
9b86d6bb | 9236 | tree args, int flags, |
a742c759 | 9237 | bool *no_add_attrs) |
349ae713 NB |
9238 | { |
9239 | tree type = NULL_TREE; | |
9240 | int warn = 0; | |
c51a1ba9 | 9241 | tree what = NULL_TREE; |
35b1a6fa | 9242 | |
9b86d6bb L |
9243 | if (!args) |
9244 | *no_add_attrs = true; | |
9245 | else if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
9246 | { | |
9247 | error ("deprecated message is not a string"); | |
9248 | *no_add_attrs = true; | |
9249 | } | |
9250 | ||
349ae713 NB |
9251 | if (DECL_P (*node)) |
9252 | { | |
9253 | tree decl = *node; | |
9254 | type = TREE_TYPE (decl); | |
35b1a6fa | 9255 | |
349ae713 NB |
9256 | if (TREE_CODE (decl) == TYPE_DECL |
9257 | || TREE_CODE (decl) == PARM_DECL | |
21b634ae | 9258 | || VAR_OR_FUNCTION_DECL_P (decl) |
a1178b30 | 9259 | || TREE_CODE (decl) == FIELD_DECL |
fd5c817a | 9260 | || TREE_CODE (decl) == CONST_DECL |
a1178b30 | 9261 | || objc_method_decl (TREE_CODE (decl))) |
349ae713 NB |
9262 | TREE_DEPRECATED (decl) = 1; |
9263 | else | |
9264 | warn = 1; | |
9265 | } | |
9266 | else if (TYPE_P (*node)) | |
9267 | { | |
9268 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 9269 | *node = build_variant_type_copy (*node); |
349ae713 NB |
9270 | TREE_DEPRECATED (*node) = 1; |
9271 | type = *node; | |
9272 | } | |
9273 | else | |
9274 | warn = 1; | |
35b1a6fa | 9275 | |
349ae713 NB |
9276 | if (warn) |
9277 | { | |
9278 | *no_add_attrs = true; | |
9279 | if (type && TYPE_NAME (type)) | |
9280 | { | |
9281 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
c51a1ba9 | 9282 | what = TYPE_NAME (*node); |
349ae713 NB |
9283 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
9284 | && DECL_NAME (TYPE_NAME (type))) | |
c51a1ba9 | 9285 | what = DECL_NAME (TYPE_NAME (type)); |
349ae713 NB |
9286 | } |
9287 | if (what) | |
5c498b10 | 9288 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
349ae713 | 9289 | else |
5c498b10 | 9290 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
9291 | } |
9292 | ||
9293 | return NULL_TREE; | |
9294 | } | |
9295 | ||
349ae713 NB |
9296 | /* Handle a "vector_size" attribute; arguments as in |
9297 | struct attribute_spec.handler. */ | |
9298 | ||
9299 | static tree | |
35b1a6fa | 9300 | handle_vector_size_attribute (tree *node, tree name, tree args, |
e18476eb | 9301 | int ARG_UNUSED (flags), |
a742c759 | 9302 | bool *no_add_attrs) |
349ae713 NB |
9303 | { |
9304 | unsigned HOST_WIDE_INT vecsize, nunits; | |
ef4bddc2 | 9305 | machine_mode orig_mode; |
4a5eab38 | 9306 | tree type = *node, new_type, size; |
349ae713 NB |
9307 | |
9308 | *no_add_attrs = true; | |
9309 | ||
4a5eab38 | 9310 | size = TREE_VALUE (args); |
661a0813 MP |
9311 | if (size && TREE_CODE (size) != IDENTIFIER_NODE |
9312 | && TREE_CODE (size) != FUNCTION_DECL) | |
5d77fb19 | 9313 | size = default_conversion (size); |
4a5eab38 | 9314 | |
cc269bb6 | 9315 | if (!tree_fits_uhwi_p (size)) |
349ae713 | 9316 | { |
5c498b10 | 9317 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
9318 | return NULL_TREE; |
9319 | } | |
9320 | ||
9321 | /* Get the vector size (in bytes). */ | |
ae7e9ddd | 9322 | vecsize = tree_to_uhwi (size); |
349ae713 NB |
9323 | |
9324 | /* We need to provide for vector pointers, vector arrays, and | |
9325 | functions returning vectors. For example: | |
9326 | ||
9327 | __attribute__((vector_size(16))) short *foo; | |
9328 | ||
9329 | In this case, the mode is SI, but the type being modified is | |
9330 | HI, so we need to look further. */ | |
9331 | ||
9332 | while (POINTER_TYPE_P (type) | |
9333 | || TREE_CODE (type) == FUNCTION_TYPE | |
43dc123f | 9334 | || TREE_CODE (type) == METHOD_TYPE |
270e749d JJ |
9335 | || TREE_CODE (type) == ARRAY_TYPE |
9336 | || TREE_CODE (type) == OFFSET_TYPE) | |
349ae713 NB |
9337 | type = TREE_TYPE (type); |
9338 | ||
9339 | /* Get the mode of the type being modified. */ | |
9340 | orig_mode = TYPE_MODE (type); | |
9341 | ||
270e749d JJ |
9342 | if ((!INTEGRAL_TYPE_P (type) |
9343 | && !SCALAR_FLOAT_TYPE_P (type) | |
9344 | && !FIXED_POINT_TYPE_P (type)) | |
3d8bf70f | 9345 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
ab22c1fa CF |
9346 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
9347 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
cc269bb6 | 9348 | || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type)) |
e4e5261f | 9349 | || TREE_CODE (type) == BOOLEAN_TYPE) |
349ae713 | 9350 | { |
c51a1ba9 | 9351 | error ("invalid vector type for attribute %qE", name); |
349ae713 NB |
9352 | return NULL_TREE; |
9353 | } | |
9354 | ||
ae7e9ddd | 9355 | if (vecsize % tree_to_uhwi (TYPE_SIZE_UNIT (type))) |
ee8960e5 JJ |
9356 | { |
9357 | error ("vector size not an integral multiple of component size"); | |
9358 | return NULL; | |
9359 | } | |
9360 | ||
9361 | if (vecsize == 0) | |
9362 | { | |
9363 | error ("zero vector size"); | |
9364 | return NULL; | |
9365 | } | |
9366 | ||
349ae713 | 9367 | /* Calculate how many units fit in the vector. */ |
ae7e9ddd | 9368 | nunits = vecsize / tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
26277d41 | 9369 | if (nunits & (nunits - 1)) |
349ae713 | 9370 | { |
26277d41 | 9371 | error ("number of components of the vector not a power of two"); |
349ae713 NB |
9372 | return NULL_TREE; |
9373 | } | |
9374 | ||
26277d41 | 9375 | new_type = build_vector_type (type, nunits); |
349ae713 NB |
9376 | |
9377 | /* Build back pointers if needed. */ | |
5dc11954 | 9378 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
349ae713 NB |
9379 | |
9380 | return NULL_TREE; | |
9381 | } | |
9382 | ||
b34c7881 JT |
9383 | /* Handle the "nonnull" attribute. */ |
9384 | static tree | |
e18476eb BI |
9385 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
9386 | tree args, int ARG_UNUSED (flags), | |
a742c759 | 9387 | bool *no_add_attrs) |
b34c7881 JT |
9388 | { |
9389 | tree type = *node; | |
9390 | unsigned HOST_WIDE_INT attr_arg_num; | |
9391 | ||
9392 | /* If no arguments are specified, all pointer arguments should be | |
95bd1dd7 | 9393 | non-null. Verify a full prototype is given so that the arguments |
b34c7881 | 9394 | will have the correct types when we actually check them later. */ |
3f75a254 | 9395 | if (!args) |
b34c7881 | 9396 | { |
f4da8dce | 9397 | if (!prototype_p (type)) |
b34c7881 JT |
9398 | { |
9399 | error ("nonnull attribute without arguments on a non-prototype"); | |
6de9cd9a | 9400 | *no_add_attrs = true; |
b34c7881 JT |
9401 | } |
9402 | return NULL_TREE; | |
9403 | } | |
9404 | ||
9405 | /* Argument list specified. Verify that each argument number references | |
9406 | a pointer argument. */ | |
5d77fb19 | 9407 | for (attr_arg_num = 1; args; attr_arg_num++, args = TREE_CHAIN (args)) |
b34c7881 | 9408 | { |
6de9cd9a | 9409 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
b34c7881 | 9410 | |
5d77fb19 MG |
9411 | tree arg = TREE_VALUE (args); |
9412 | if (arg && TREE_CODE (arg) != IDENTIFIER_NODE | |
9413 | && TREE_CODE (arg) != FUNCTION_DECL) | |
9414 | arg = default_conversion (arg); | |
9415 | ||
9416 | if (!get_nonnull_operand (arg, &arg_num)) | |
b34c7881 | 9417 | { |
40b97a2e | 9418 | error ("nonnull argument has invalid operand number (argument %lu)", |
b34c7881 JT |
9419 | (unsigned long) attr_arg_num); |
9420 | *no_add_attrs = true; | |
9421 | return NULL_TREE; | |
9422 | } | |
9423 | ||
e19a18d4 | 9424 | if (prototype_p (type)) |
b34c7881 | 9425 | { |
e19a18d4 NF |
9426 | function_args_iterator iter; |
9427 | tree argument; | |
9428 | ||
9429 | function_args_iter_init (&iter, type); | |
9430 | for (ck_num = 1; ; ck_num++, function_args_iter_next (&iter)) | |
b34c7881 | 9431 | { |
e19a18d4 NF |
9432 | argument = function_args_iter_cond (&iter); |
9433 | if (argument == NULL_TREE || ck_num == arg_num) | |
b34c7881 | 9434 | break; |
b34c7881 JT |
9435 | } |
9436 | ||
3f75a254 | 9437 | if (!argument |
e19a18d4 | 9438 | || TREE_CODE (argument) == VOID_TYPE) |
b34c7881 | 9439 | { |
40b97a2e | 9440 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
b34c7881 JT |
9441 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
9442 | *no_add_attrs = true; | |
9443 | return NULL_TREE; | |
9444 | } | |
9445 | ||
e19a18d4 | 9446 | if (TREE_CODE (argument) != POINTER_TYPE) |
b34c7881 | 9447 | { |
40b97a2e | 9448 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
b34c7881 JT |
9449 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
9450 | *no_add_attrs = true; | |
9451 | return NULL_TREE; | |
9452 | } | |
9453 | } | |
9454 | } | |
9455 | ||
9456 | return NULL_TREE; | |
9457 | } | |
9458 | ||
9459 | /* Check the argument list of a function call for null in argument slots | |
94a0dd7b SL |
9460 | that are marked as requiring a non-null pointer argument. The NARGS |
9461 | arguments are passed in the array ARGARRAY. | |
9462 | */ | |
b34c7881 JT |
9463 | |
9464 | static void | |
94a0dd7b | 9465 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
b34c7881 | 9466 | { |
332f1d24 | 9467 | tree a; |
94a0dd7b | 9468 | int i; |
b34c7881 | 9469 | |
332f1d24 JJ |
9470 | attrs = lookup_attribute ("nonnull", attrs); |
9471 | if (attrs == NULL_TREE) | |
9472 | return; | |
9473 | ||
9474 | a = attrs; | |
9475 | /* See if any of the nonnull attributes has no arguments. If so, | |
9476 | then every pointer argument is checked (in which case the check | |
9477 | for pointer type is done in check_nonnull_arg). */ | |
9478 | if (TREE_VALUE (a) != NULL_TREE) | |
9479 | do | |
9480 | a = lookup_attribute ("nonnull", TREE_CHAIN (a)); | |
9481 | while (a != NULL_TREE && TREE_VALUE (a) != NULL_TREE); | |
9482 | ||
9483 | if (a != NULL_TREE) | |
9484 | for (i = 0; i < nargs; i++) | |
9485 | check_function_arguments_recurse (check_nonnull_arg, NULL, argarray[i], | |
9486 | i + 1); | |
9487 | else | |
b34c7881 | 9488 | { |
332f1d24 JJ |
9489 | /* Walk the argument list. If we encounter an argument number we |
9490 | should check for non-null, do it. */ | |
9491 | for (i = 0; i < nargs; i++) | |
b34c7881 | 9492 | { |
332f1d24 | 9493 | for (a = attrs; ; a = TREE_CHAIN (a)) |
6de9cd9a | 9494 | { |
332f1d24 JJ |
9495 | a = lookup_attribute ("nonnull", a); |
9496 | if (a == NULL_TREE || nonnull_check_p (TREE_VALUE (a), i + 1)) | |
9497 | break; | |
6de9cd9a | 9498 | } |
332f1d24 JJ |
9499 | |
9500 | if (a != NULL_TREE) | |
9501 | check_function_arguments_recurse (check_nonnull_arg, NULL, | |
9502 | argarray[i], i + 1); | |
b34c7881 JT |
9503 | } |
9504 | } | |
9505 | } | |
9506 | ||
254986c7 | 9507 | /* Check that the Nth argument of a function call (counting backwards |
94a0dd7b SL |
9508 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
9509 | array ARGARRAY. */ | |
3d091dac KG |
9510 | |
9511 | static void | |
dde05067 | 9512 | check_function_sentinel (const_tree fntype, int nargs, tree *argarray) |
3d091dac | 9513 | { |
dde05067 | 9514 | tree attr = lookup_attribute ("sentinel", TYPE_ATTRIBUTES (fntype)); |
3d091dac KG |
9515 | |
9516 | if (attr) | |
9517 | { | |
94a0dd7b SL |
9518 | int len = 0; |
9519 | int pos = 0; | |
9520 | tree sentinel; | |
dde05067 NF |
9521 | function_args_iterator iter; |
9522 | tree t; | |
c22cacf3 | 9523 | |
94a0dd7b | 9524 | /* Skip over the named arguments. */ |
dde05067 | 9525 | FOREACH_FUNCTION_ARGS (fntype, t, iter) |
c22cacf3 | 9526 | { |
dde05067 NF |
9527 | if (len == nargs) |
9528 | break; | |
94a0dd7b SL |
9529 | len++; |
9530 | } | |
254986c7 | 9531 | |
94a0dd7b SL |
9532 | if (TREE_VALUE (attr)) |
9533 | { | |
9534 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
9535 | pos = TREE_INT_CST_LOW (p); | |
9536 | } | |
254986c7 | 9537 | |
94a0dd7b SL |
9538 | /* The sentinel must be one of the varargs, i.e. |
9539 | in position >= the number of fixed arguments. */ | |
9540 | if ((nargs - 1 - pos) < len) | |
9541 | { | |
7332899a | 9542 | warning (OPT_Wformat_, |
94a0dd7b SL |
9543 | "not enough variable arguments to fit a sentinel"); |
9544 | return; | |
3d091dac | 9545 | } |
94a0dd7b SL |
9546 | |
9547 | /* Validate the sentinel. */ | |
9548 | sentinel = argarray[nargs - 1 - pos]; | |
9549 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
9550 | || !integer_zerop (sentinel)) | |
9551 | /* Although __null (in C++) is only an integer we allow it | |
9552 | nevertheless, as we are guaranteed that it's exactly | |
9553 | as wide as a pointer, and we don't want to force | |
9554 | users to cast the NULL they have written there. | |
9555 | We warn with -Wstrict-null-sentinel, though. */ | |
9556 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
7332899a | 9557 | warning (OPT_Wformat_, "missing sentinel in function call"); |
3d091dac KG |
9558 | } |
9559 | } | |
9560 | ||
b34c7881 JT |
9561 | /* Helper for check_function_nonnull; given a list of operands which |
9562 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
9563 | checked. */ | |
9564 | ||
9565 | static bool | |
35b1a6fa | 9566 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
b34c7881 | 9567 | { |
6de9cd9a | 9568 | unsigned HOST_WIDE_INT arg_num = 0; |
b34c7881 JT |
9569 | |
9570 | for (; args; args = TREE_CHAIN (args)) | |
9571 | { | |
366de0ce NS |
9572 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
9573 | ||
9574 | gcc_assert (found); | |
b34c7881 JT |
9575 | |
9576 | if (arg_num == param_num) | |
9577 | return true; | |
9578 | } | |
9579 | return false; | |
9580 | } | |
9581 | ||
9582 | /* Check that the function argument PARAM (which is operand number | |
9583 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
9584 | via check_function_arguments_recurse. */ | |
9585 | ||
9586 | static void | |
e18476eb | 9587 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
35b1a6fa | 9588 | unsigned HOST_WIDE_INT param_num) |
b34c7881 JT |
9589 | { |
9590 | /* Just skip checking the argument if it's not a pointer. This can | |
9591 | happen if the "nonnull" attribute was given without an operand | |
9592 | list (which means to check every pointer argument). */ | |
9593 | ||
9594 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
9595 | return; | |
9596 | ||
9597 | if (integer_zerop (param)) | |
30480ec4 DD |
9598 | warning (OPT_Wnonnull, "null argument where non-null required " |
9599 | "(argument %lu)", (unsigned long) param_num); | |
b34c7881 JT |
9600 | } |
9601 | ||
9602 | /* Helper for nonnull attribute handling; fetch the operand number | |
9603 | from the attribute argument list. */ | |
9604 | ||
9605 | static bool | |
35b1a6fa | 9606 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
b34c7881 | 9607 | { |
807e902e KZ |
9608 | /* Verify the arg number is a small constant. */ |
9609 | if (tree_fits_uhwi_p (arg_num_expr)) | |
9610 | { | |
9611 | *valp = TREE_INT_CST_LOW (arg_num_expr); | |
9612 | return true; | |
9613 | } | |
9614 | else | |
b34c7881 | 9615 | return false; |
b34c7881 | 9616 | } |
39f2f3c8 RS |
9617 | |
9618 | /* Handle a "nothrow" attribute; arguments as in | |
9619 | struct attribute_spec.handler. */ | |
9620 | ||
9621 | static tree | |
e18476eb BI |
9622 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
9623 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
39f2f3c8 RS |
9624 | { |
9625 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
9626 | TREE_NOTHROW (*node) = 1; | |
9627 | /* ??? TODO: Support types. */ | |
9628 | else | |
9629 | { | |
5c498b10 | 9630 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
39f2f3c8 RS |
9631 | *no_add_attrs = true; |
9632 | } | |
9633 | ||
9634 | return NULL_TREE; | |
9635 | } | |
0bfa5f65 RH |
9636 | |
9637 | /* Handle a "cleanup" attribute; arguments as in | |
9638 | struct attribute_spec.handler. */ | |
9639 | ||
9640 | static tree | |
35b1a6fa | 9641 | handle_cleanup_attribute (tree *node, tree name, tree args, |
e18476eb | 9642 | int ARG_UNUSED (flags), bool *no_add_attrs) |
0bfa5f65 RH |
9643 | { |
9644 | tree decl = *node; | |
9645 | tree cleanup_id, cleanup_decl; | |
9646 | ||
9647 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
9648 | for global destructors in C++. This requires infrastructure that | |
9649 | we don't have generically at the moment. It's also not a feature | |
9650 | we'd be missing too much, since we do have attribute constructor. */ | |
0ae9bd27 | 9651 | if (!VAR_P (decl) || TREE_STATIC (decl)) |
0bfa5f65 | 9652 | { |
5c498b10 | 9653 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
0bfa5f65 RH |
9654 | *no_add_attrs = true; |
9655 | return NULL_TREE; | |
9656 | } | |
9657 | ||
9658 | /* Verify that the argument is a function in scope. */ | |
9659 | /* ??? We could support pointers to functions here as well, if | |
9660 | that was considered desirable. */ | |
9661 | cleanup_id = TREE_VALUE (args); | |
9662 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
9663 | { | |
40b97a2e | 9664 | error ("cleanup argument not an identifier"); |
0bfa5f65 RH |
9665 | *no_add_attrs = true; |
9666 | return NULL_TREE; | |
9667 | } | |
10e6657a | 9668 | cleanup_decl = lookup_name (cleanup_id); |
0bfa5f65 RH |
9669 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
9670 | { | |
40b97a2e | 9671 | error ("cleanup argument not a function"); |
0bfa5f65 RH |
9672 | *no_add_attrs = true; |
9673 | return NULL_TREE; | |
9674 | } | |
9675 | ||
35b1a6fa | 9676 | /* That the function has proper type is checked with the |
0bfa5f65 RH |
9677 | eventual call to build_function_call. */ |
9678 | ||
9679 | return NULL_TREE; | |
9680 | } | |
72954a4f JM |
9681 | |
9682 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
9683 | ||
9684 | static tree | |
9685 | handle_warn_unused_result_attribute (tree *node, tree name, | |
e18476eb BI |
9686 | tree ARG_UNUSED (args), |
9687 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
72954a4f JM |
9688 | { |
9689 | /* Ignore the attribute for functions not returning any value. */ | |
9690 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
9691 | { | |
5c498b10 | 9692 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
72954a4f JM |
9693 | *no_add_attrs = true; |
9694 | } | |
9695 | ||
9696 | return NULL_TREE; | |
9697 | } | |
3d091dac KG |
9698 | |
9699 | /* Handle a "sentinel" attribute. */ | |
9700 | ||
9701 | static tree | |
254986c7 | 9702 | handle_sentinel_attribute (tree *node, tree name, tree args, |
3d091dac KG |
9703 | int ARG_UNUSED (flags), bool *no_add_attrs) |
9704 | { | |
f4da8dce | 9705 | if (!prototype_p (*node)) |
3d091dac | 9706 | { |
5c498b10 DD |
9707 | warning (OPT_Wattributes, |
9708 | "%qE attribute requires prototypes with named arguments", name); | |
3d091dac | 9709 | *no_add_attrs = true; |
3d091dac | 9710 | } |
254986c7 KG |
9711 | else |
9712 | { | |
dcf0c47e | 9713 | if (!stdarg_p (*node)) |
c22cacf3 | 9714 | { |
5c498b10 DD |
9715 | warning (OPT_Wattributes, |
9716 | "%qE attribute only applies to variadic functions", name); | |
254986c7 KG |
9717 | *no_add_attrs = true; |
9718 | } | |
9719 | } | |
c22cacf3 | 9720 | |
254986c7 | 9721 | if (args) |
3d091dac | 9722 | { |
254986c7 | 9723 | tree position = TREE_VALUE (args); |
661a0813 MP |
9724 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
9725 | && TREE_CODE (position) != FUNCTION_DECL) | |
9726 | position = default_conversion (position); | |
254986c7 | 9727 | |
661a0813 MP |
9728 | if (TREE_CODE (position) != INTEGER_CST |
9729 | || !INTEGRAL_TYPE_P (TREE_TYPE (position))) | |
c22cacf3 | 9730 | { |
b8698a0f | 9731 | warning (OPT_Wattributes, |
aa86a51b | 9732 | "requested position is not an integer constant"); |
254986c7 KG |
9733 | *no_add_attrs = true; |
9734 | } | |
9735 | else | |
c22cacf3 | 9736 | { |
254986c7 KG |
9737 | if (tree_int_cst_lt (position, integer_zero_node)) |
9738 | { | |
aa86a51b DM |
9739 | warning (OPT_Wattributes, |
9740 | "requested position is less than zero"); | |
254986c7 KG |
9741 | *no_add_attrs = true; |
9742 | } | |
9743 | } | |
3d091dac | 9744 | } |
c22cacf3 | 9745 | |
3d091dac KG |
9746 | return NULL_TREE; |
9747 | } | |
b5d32c25 KG |
9748 | |
9749 | /* Handle a "type_generic" attribute. */ | |
9750 | ||
9751 | static tree | |
9752 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
9753 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9754 | bool * ARG_UNUSED (no_add_attrs)) | |
9755 | { | |
3bf5906b KG |
9756 | /* Ensure we have a function type. */ |
9757 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
b8698a0f | 9758 | |
3bf5906b | 9759 | /* Ensure we have a variadic function. */ |
dcf0c47e | 9760 | gcc_assert (!prototype_p (*node) || stdarg_p (*node)); |
b5d32c25 KG |
9761 | |
9762 | return NULL_TREE; | |
9763 | } | |
ab442df7 | 9764 | |
5779e713 | 9765 | /* Handle a "target" attribute. */ |
ab442df7 MM |
9766 | |
9767 | static tree | |
5779e713 | 9768 | handle_target_attribute (tree *node, tree name, tree args, int flags, |
ab442df7 MM |
9769 | bool *no_add_attrs) |
9770 | { | |
9771 | /* Ensure we have a function type. */ | |
9772 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9773 | { | |
9774 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9775 | *no_add_attrs = true; | |
9776 | } | |
ab442df7 | 9777 | else if (! targetm.target_option.valid_attribute_p (*node, name, args, |
32887460 | 9778 | flags)) |
ab442df7 MM |
9779 | *no_add_attrs = true; |
9780 | ||
9781 | return NULL_TREE; | |
9782 | } | |
9783 | ||
9784 | /* Arguments being collected for optimization. */ | |
9785 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
9771b263 | 9786 | static GTY(()) vec<const_char_p, va_gc> *optimize_args; |
ab442df7 MM |
9787 | |
9788 | ||
9789 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
9790 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
9791 | false for #pragma GCC optimize. */ | |
9792 | ||
9793 | bool | |
9794 | parse_optimize_options (tree args, bool attr_p) | |
9795 | { | |
9796 | bool ret = true; | |
9797 | unsigned opt_argc; | |
9798 | unsigned i; | |
cbc19f39 | 9799 | int saved_flag_strict_aliasing; |
ab442df7 | 9800 | const char **opt_argv; |
6e2f1956 JM |
9801 | struct cl_decoded_option *decoded_options; |
9802 | unsigned int decoded_options_count; | |
ab442df7 MM |
9803 | tree ap; |
9804 | ||
9805 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
9806 | collected strings. */ | |
9771b263 DN |
9807 | vec_safe_truncate (optimize_args, 0); |
9808 | vec_safe_push (optimize_args, (const char *) NULL); | |
ab442df7 MM |
9809 | |
9810 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
9811 | { | |
9812 | tree value = TREE_VALUE (ap); | |
9813 | ||
9814 | if (TREE_CODE (value) == INTEGER_CST) | |
9815 | { | |
9816 | char buffer[20]; | |
9817 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); | |
9771b263 | 9818 | vec_safe_push (optimize_args, ggc_strdup (buffer)); |
ab442df7 MM |
9819 | } |
9820 | ||
9821 | else if (TREE_CODE (value) == STRING_CST) | |
9822 | { | |
9823 | /* Split string into multiple substrings. */ | |
9824 | size_t len = TREE_STRING_LENGTH (value); | |
9825 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
9826 | char *end = p + len; | |
9827 | char *comma; | |
9828 | char *next_p = p; | |
9829 | ||
9830 | while (next_p != NULL) | |
9831 | { | |
9832 | size_t len2; | |
9833 | char *q, *r; | |
9834 | ||
9835 | p = next_p; | |
9836 | comma = strchr (p, ','); | |
9837 | if (comma) | |
9838 | { | |
9839 | len2 = comma - p; | |
9840 | *comma = '\0'; | |
9841 | next_p = comma+1; | |
9842 | } | |
9843 | else | |
9844 | { | |
9845 | len2 = end - p; | |
9846 | next_p = NULL; | |
9847 | } | |
9848 | ||
a9429e29 | 9849 | r = q = (char *) ggc_alloc_atomic (len2 + 3); |
ab442df7 MM |
9850 | |
9851 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx | |
9852 | options. */ | |
9853 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
9854 | { | |
9855 | ret = false; | |
9856 | if (attr_p) | |
9857 | warning (OPT_Wattributes, | |
06730c5d | 9858 | "bad option %s to optimize attribute", p); |
ab442df7 MM |
9859 | else |
9860 | warning (OPT_Wpragmas, | |
de621752 | 9861 | "bad option %s to pragma attribute", p); |
ab442df7 MM |
9862 | continue; |
9863 | } | |
9864 | ||
9865 | if (*p != '-') | |
9866 | { | |
9867 | *r++ = '-'; | |
9868 | ||
9869 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
9870 | itself is -Os, and any other switch begins with a -f. */ | |
9871 | if ((*p >= '0' && *p <= '9') | |
9872 | || (p[0] == 's' && p[1] == '\0')) | |
9873 | *r++ = 'O'; | |
9874 | else if (*p != 'O') | |
9875 | *r++ = 'f'; | |
9876 | } | |
9877 | ||
9878 | memcpy (r, p, len2); | |
9879 | r[len2] = '\0'; | |
9771b263 | 9880 | vec_safe_push (optimize_args, (const char *) q); |
ab442df7 MM |
9881 | } |
9882 | ||
9883 | } | |
9884 | } | |
9885 | ||
9771b263 | 9886 | opt_argc = optimize_args->length (); |
ab442df7 MM |
9887 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); |
9888 | ||
9889 | for (i = 1; i < opt_argc; i++) | |
9771b263 | 9890 | opt_argv[i] = (*optimize_args)[i]; |
ab442df7 | 9891 | |
cbc19f39 JJ |
9892 | saved_flag_strict_aliasing = flag_strict_aliasing; |
9893 | ||
ab442df7 | 9894 | /* Now parse the options. */ |
a75bfaa6 JM |
9895 | decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv, |
9896 | &decoded_options, | |
9897 | &decoded_options_count); | |
9898 | decode_options (&global_options, &global_options_set, | |
a4d8c676 JM |
9899 | decoded_options, decoded_options_count, |
9900 | input_location, global_dc); | |
ab442df7 | 9901 | |
2b7e2984 SE |
9902 | targetm.override_options_after_change(); |
9903 | ||
cbc19f39 JJ |
9904 | /* Don't allow changing -fstrict-aliasing. */ |
9905 | flag_strict_aliasing = saved_flag_strict_aliasing; | |
9906 | ||
9771b263 | 9907 | optimize_args->truncate (0); |
ab442df7 MM |
9908 | return ret; |
9909 | } | |
9910 | ||
9911 | /* For handling "optimize" attribute. arguments as in | |
9912 | struct attribute_spec.handler. */ | |
9913 | ||
9914 | static tree | |
9915 | handle_optimize_attribute (tree *node, tree name, tree args, | |
9916 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
9917 | { | |
9918 | /* Ensure we have a function type. */ | |
9919 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9920 | { | |
9921 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9922 | *no_add_attrs = true; | |
9923 | } | |
9924 | else | |
9925 | { | |
9926 | struct cl_optimization cur_opts; | |
9927 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
9928 | ||
9929 | /* Save current options. */ | |
46625112 | 9930 | cl_optimization_save (&cur_opts, &global_options); |
ab442df7 MM |
9931 | |
9932 | /* If we previously had some optimization options, use them as the | |
9933 | default. */ | |
9934 | if (old_opts) | |
46625112 JM |
9935 | cl_optimization_restore (&global_options, |
9936 | TREE_OPTIMIZATION (old_opts)); | |
ab442df7 MM |
9937 | |
9938 | /* Parse options, and update the vector. */ | |
9939 | parse_optimize_options (args, true); | |
9940 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
bf7b5747 | 9941 | = build_optimization_node (&global_options); |
ab442df7 MM |
9942 | |
9943 | /* Restore current options. */ | |
46625112 | 9944 | cl_optimization_restore (&global_options, &cur_opts); |
ab442df7 MM |
9945 | } |
9946 | ||
9947 | return NULL_TREE; | |
9948 | } | |
7458026b ILT |
9949 | |
9950 | /* Handle a "no_split_stack" attribute. */ | |
9951 | ||
9952 | static tree | |
9953 | handle_no_split_stack_attribute (tree *node, tree name, | |
9954 | tree ARG_UNUSED (args), | |
9955 | int ARG_UNUSED (flags), | |
9956 | bool *no_add_attrs) | |
9957 | { | |
9958 | tree decl = *node; | |
9959 | ||
9960 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
9961 | { | |
9962 | error_at (DECL_SOURCE_LOCATION (decl), | |
9963 | "%qE attribute applies only to functions", name); | |
9964 | *no_add_attrs = true; | |
9965 | } | |
9966 | else if (DECL_INITIAL (decl)) | |
9967 | { | |
9968 | error_at (DECL_SOURCE_LOCATION (decl), | |
9969 | "can%'t set %qE attribute after definition", name); | |
9970 | *no_add_attrs = true; | |
9971 | } | |
9972 | ||
9973 | return NULL_TREE; | |
9974 | } | |
826cacfe MG |
9975 | |
9976 | /* Handle a "returns_nonnull" attribute; arguments as in | |
9977 | struct attribute_spec.handler. */ | |
9978 | ||
9979 | static tree | |
9980 | handle_returns_nonnull_attribute (tree *node, tree, tree, int, | |
9981 | bool *no_add_attrs) | |
9982 | { | |
9983 | // Even without a prototype we still have a return type we can check. | |
9984 | if (TREE_CODE (TREE_TYPE (*node)) != POINTER_TYPE) | |
9985 | { | |
9986 | error ("returns_nonnull attribute on a function not returning a pointer"); | |
9987 | *no_add_attrs = true; | |
9988 | } | |
9989 | return NULL_TREE; | |
9990 | } | |
9991 | ||
976d5a22 TT |
9992 | /* Handle a "designated_init" attribute; arguments as in |
9993 | struct attribute_spec.handler. */ | |
9994 | ||
9995 | static tree | |
9996 | handle_designated_init_attribute (tree *node, tree name, tree, int, | |
9997 | bool *no_add_attrs) | |
9998 | { | |
9999 | if (TREE_CODE (*node) != RECORD_TYPE) | |
10000 | { | |
10001 | error ("%qE attribute is only valid on %<struct%> type", name); | |
10002 | *no_add_attrs = true; | |
10003 | } | |
10004 | return NULL_TREE; | |
10005 | } | |
10006 | ||
b34c7881 | 10007 | \f |
dde05067 NF |
10008 | /* Check for valid arguments being passed to a function with FNTYPE. |
10009 | There are NARGS arguments in the array ARGARRAY. */ | |
b34c7881 | 10010 | void |
dde05067 | 10011 | check_function_arguments (const_tree fntype, int nargs, tree *argarray) |
b34c7881 JT |
10012 | { |
10013 | /* Check for null being passed in a pointer argument that must be | |
10014 | non-null. We also need to do this if format checking is enabled. */ | |
10015 | ||
10016 | if (warn_nonnull) | |
dde05067 | 10017 | check_function_nonnull (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
b34c7881 JT |
10018 | |
10019 | /* Check for errors in format strings. */ | |
10020 | ||
e6c69da0 | 10021 | if (warn_format || warn_suggest_attribute_format) |
dde05067 | 10022 | check_function_format (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
7876a414 KG |
10023 | |
10024 | if (warn_format) | |
dde05067 | 10025 | check_function_sentinel (fntype, nargs, argarray); |
b34c7881 JT |
10026 | } |
10027 | ||
10028 | /* Generic argument checking recursion routine. PARAM is the argument to | |
10029 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
10030 | once the argument is resolved. CTX is context for the callback. */ | |
10031 | void | |
35b1a6fa AJ |
10032 | check_function_arguments_recurse (void (*callback) |
10033 | (void *, tree, unsigned HOST_WIDE_INT), | |
10034 | void *ctx, tree param, | |
10035 | unsigned HOST_WIDE_INT param_num) | |
b34c7881 | 10036 | { |
1043771b | 10037 | if (CONVERT_EXPR_P (param) |
1344f9a3 JM |
10038 | && (TYPE_PRECISION (TREE_TYPE (param)) |
10039 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
b34c7881 JT |
10040 | { |
10041 | /* Strip coercion. */ | |
10042 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 10043 | TREE_OPERAND (param, 0), param_num); |
b34c7881 JT |
10044 | return; |
10045 | } | |
10046 | ||
10047 | if (TREE_CODE (param) == CALL_EXPR) | |
10048 | { | |
5039610b | 10049 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
b34c7881 JT |
10050 | tree attrs; |
10051 | bool found_format_arg = false; | |
10052 | ||
10053 | /* See if this is a call to a known internationalization function | |
10054 | that modifies a format arg. Such a function may have multiple | |
10055 | format_arg attributes (for example, ngettext). */ | |
10056 | ||
10057 | for (attrs = TYPE_ATTRIBUTES (type); | |
10058 | attrs; | |
10059 | attrs = TREE_CHAIN (attrs)) | |
10060 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
10061 | { | |
5039610b | 10062 | tree inner_arg; |
b34c7881 JT |
10063 | tree format_num_expr; |
10064 | int format_num; | |
10065 | int i; | |
5039610b | 10066 | call_expr_arg_iterator iter; |
b34c7881 JT |
10067 | |
10068 | /* Extract the argument number, which was previously checked | |
10069 | to be valid. */ | |
10070 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
b34c7881 | 10071 | |
6b3b8c27 | 10072 | format_num = tree_to_uhwi (format_num_expr); |
b34c7881 | 10073 | |
5039610b SL |
10074 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
10075 | inner_arg != 0; | |
10076 | inner_arg = next_call_expr_arg (&iter), i++) | |
b34c7881 JT |
10077 | if (i == format_num) |
10078 | { | |
10079 | check_function_arguments_recurse (callback, ctx, | |
5039610b | 10080 | inner_arg, param_num); |
b34c7881 JT |
10081 | found_format_arg = true; |
10082 | break; | |
10083 | } | |
10084 | } | |
10085 | ||
10086 | /* If we found a format_arg attribute and did a recursive check, | |
10087 | we are done with checking this argument. Otherwise, we continue | |
10088 | and this will be considered a non-literal. */ | |
10089 | if (found_format_arg) | |
10090 | return; | |
10091 | } | |
10092 | ||
10093 | if (TREE_CODE (param) == COND_EXPR) | |
10094 | { | |
10095 | /* Check both halves of the conditional expression. */ | |
10096 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 10097 | TREE_OPERAND (param, 1), param_num); |
b34c7881 | 10098 | check_function_arguments_recurse (callback, ctx, |
6de9cd9a | 10099 | TREE_OPERAND (param, 2), param_num); |
b34c7881 JT |
10100 | return; |
10101 | } | |
10102 | ||
10103 | (*callback) (ctx, param, param_num); | |
10104 | } | |
e2500fed | 10105 | |
a98c2819 MLI |
10106 | /* Checks for a builtin function FNDECL that the number of arguments |
10107 | NARGS against the required number REQUIRED and issues an error if | |
10108 | there is a mismatch. Returns true if the number of arguments is | |
10109 | correct, otherwise false. */ | |
83322951 RG |
10110 | |
10111 | static bool | |
a98c2819 | 10112 | builtin_function_validate_nargs (tree fndecl, int nargs, int required) |
83322951 RG |
10113 | { |
10114 | if (nargs < required) | |
10115 | { | |
a98c2819 MLI |
10116 | error_at (input_location, |
10117 | "not enough arguments to function %qE", fndecl); | |
83322951 RG |
10118 | return false; |
10119 | } | |
10120 | else if (nargs > required) | |
10121 | { | |
a98c2819 MLI |
10122 | error_at (input_location, |
10123 | "too many arguments to function %qE", fndecl); | |
83322951 RG |
10124 | return false; |
10125 | } | |
10126 | return true; | |
10127 | } | |
10128 | ||
10129 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
10130 | Returns false if there was an error, otherwise true. */ | |
10131 | ||
10132 | bool | |
10133 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
10134 | { | |
10135 | if (!DECL_BUILT_IN (fndecl) | |
10136 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
10137 | return true; | |
10138 | ||
10139 | switch (DECL_FUNCTION_CODE (fndecl)) | |
10140 | { | |
10141 | case BUILT_IN_CONSTANT_P: | |
a98c2819 | 10142 | return builtin_function_validate_nargs (fndecl, nargs, 1); |
83322951 RG |
10143 | |
10144 | case BUILT_IN_ISFINITE: | |
10145 | case BUILT_IN_ISINF: | |
05f41289 | 10146 | case BUILT_IN_ISINF_SIGN: |
83322951 RG |
10147 | case BUILT_IN_ISNAN: |
10148 | case BUILT_IN_ISNORMAL: | |
61717a45 | 10149 | case BUILT_IN_SIGNBIT: |
a98c2819 | 10150 | if (builtin_function_validate_nargs (fndecl, nargs, 1)) |
83322951 RG |
10151 | { |
10152 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
10153 | { | |
10154 | error ("non-floating-point argument in call to " | |
10155 | "function %qE", fndecl); | |
10156 | return false; | |
10157 | } | |
10158 | return true; | |
10159 | } | |
10160 | return false; | |
10161 | ||
10162 | case BUILT_IN_ISGREATER: | |
10163 | case BUILT_IN_ISGREATEREQUAL: | |
10164 | case BUILT_IN_ISLESS: | |
10165 | case BUILT_IN_ISLESSEQUAL: | |
10166 | case BUILT_IN_ISLESSGREATER: | |
10167 | case BUILT_IN_ISUNORDERED: | |
a98c2819 | 10168 | if (builtin_function_validate_nargs (fndecl, nargs, 2)) |
83322951 RG |
10169 | { |
10170 | enum tree_code code0, code1; | |
10171 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
10172 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
10173 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
10174 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
10175 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
10176 | { | |
10177 | error ("non-floating-point arguments in call to " | |
10178 | "function %qE", fndecl); | |
10179 | return false; | |
10180 | } | |
10181 | return true; | |
10182 | } | |
10183 | return false; | |
10184 | ||
3bf5906b | 10185 | case BUILT_IN_FPCLASSIFY: |
a98c2819 | 10186 | if (builtin_function_validate_nargs (fndecl, nargs, 6)) |
3bf5906b KG |
10187 | { |
10188 | unsigned i; | |
b8698a0f | 10189 | |
3bf5906b KG |
10190 | for (i=0; i<5; i++) |
10191 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
10192 | { | |
10193 | error ("non-const integer argument %u in call to function %qE", | |
10194 | i+1, fndecl); | |
10195 | return false; | |
10196 | } | |
10197 | ||
10198 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
10199 | { | |
10200 | error ("non-floating-point argument in call to function %qE", | |
10201 | fndecl); | |
10202 | return false; | |
10203 | } | |
10204 | return true; | |
10205 | } | |
10206 | return false; | |
10207 | ||
45d439ac JJ |
10208 | case BUILT_IN_ASSUME_ALIGNED: |
10209 | if (builtin_function_validate_nargs (fndecl, nargs, 2 + (nargs > 2))) | |
10210 | { | |
10211 | if (nargs >= 3 && TREE_CODE (TREE_TYPE (args[2])) != INTEGER_TYPE) | |
10212 | { | |
10213 | error ("non-integer argument 3 in call to function %qE", fndecl); | |
10214 | return false; | |
10215 | } | |
10216 | return true; | |
10217 | } | |
10218 | return false; | |
10219 | ||
1304953e JJ |
10220 | case BUILT_IN_ADD_OVERFLOW: |
10221 | case BUILT_IN_SUB_OVERFLOW: | |
10222 | case BUILT_IN_MUL_OVERFLOW: | |
10223 | if (builtin_function_validate_nargs (fndecl, nargs, 3)) | |
10224 | { | |
10225 | unsigned i; | |
10226 | for (i = 0; i < 2; i++) | |
10227 | if (!INTEGRAL_TYPE_P (TREE_TYPE (args[i]))) | |
10228 | { | |
10229 | error ("argument %u in call to function %qE does not have " | |
10230 | "integral type", i + 1, fndecl); | |
10231 | return false; | |
10232 | } | |
10233 | if (TREE_CODE (TREE_TYPE (args[2])) != POINTER_TYPE | |
10234 | || TREE_CODE (TREE_TYPE (TREE_TYPE (args[2]))) != INTEGER_TYPE) | |
10235 | { | |
10236 | error ("argument 3 in call to function %qE does not have " | |
10237 | "pointer to integer type", fndecl); | |
10238 | return false; | |
10239 | } | |
10240 | return true; | |
10241 | } | |
10242 | return false; | |
10243 | ||
83322951 RG |
10244 | default: |
10245 | return true; | |
10246 | } | |
10247 | } | |
10248 | ||
d07605f5 AP |
10249 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
10250 | ||
10251 | int | |
10252 | field_decl_cmp (const void *x_p, const void *y_p) | |
10253 | { | |
28dab132 BI |
10254 | const tree *const x = (const tree *const) x_p; |
10255 | const tree *const y = (const tree *const) y_p; | |
10256 | ||
d07605f5 AP |
10257 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
10258 | /* A nontype is "greater" than a type. */ | |
10259 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
10260 | if (DECL_NAME (*x) == NULL_TREE) | |
10261 | return -1; | |
10262 | if (DECL_NAME (*y) == NULL_TREE) | |
10263 | return 1; | |
10264 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
10265 | return -1; | |
10266 | return 1; | |
10267 | } | |
10268 | ||
10269 | static struct { | |
10270 | gt_pointer_operator new_value; | |
10271 | void *cookie; | |
10272 | } resort_data; | |
10273 | ||
10274 | /* This routine compares two fields like field_decl_cmp but using the | |
10275 | pointer operator in resort_data. */ | |
10276 | ||
10277 | static int | |
10278 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
10279 | { | |
28dab132 BI |
10280 | const tree *const x = (const tree *const) x_p; |
10281 | const tree *const y = (const tree *const) y_p; | |
d07605f5 AP |
10282 | |
10283 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
10284 | /* A nontype is "greater" than a type. */ | |
10285 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
10286 | if (DECL_NAME (*x) == NULL_TREE) | |
10287 | return -1; | |
10288 | if (DECL_NAME (*y) == NULL_TREE) | |
10289 | return 1; | |
10290 | { | |
10291 | tree d1 = DECL_NAME (*x); | |
10292 | tree d2 = DECL_NAME (*y); | |
10293 | resort_data.new_value (&d1, resort_data.cookie); | |
10294 | resort_data.new_value (&d2, resort_data.cookie); | |
10295 | if (d1 < d2) | |
10296 | return -1; | |
10297 | } | |
10298 | return 1; | |
10299 | } | |
10300 | ||
10301 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
10302 | ||
10303 | void | |
10304 | resort_sorted_fields (void *obj, | |
e18476eb | 10305 | void * ARG_UNUSED (orig_obj), |
6de9cd9a DN |
10306 | gt_pointer_operator new_value, |
10307 | void *cookie) | |
d07605f5 | 10308 | { |
e18476eb | 10309 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
d07605f5 AP |
10310 | resort_data.new_value = new_value; |
10311 | resort_data.cookie = cookie; | |
10312 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
6de9cd9a | 10313 | resort_field_decl_cmp); |
d07605f5 AP |
10314 | } |
10315 | ||
0a3ee0fd GDR |
10316 | /* Subroutine of c_parse_error. |
10317 | Return the result of concatenating LHS and RHS. RHS is really | |
10318 | a string literal, its first character is indicated by RHS_START and | |
3292fb42 | 10319 | RHS_SIZE is its length (including the terminating NUL character). |
0a3ee0fd GDR |
10320 | |
10321 | The caller is responsible for deleting the returned pointer. */ | |
10322 | ||
10323 | static char * | |
10324 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
10325 | { | |
10326 | const int lhs_size = strlen (lhs); | |
10327 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
10328 | strncpy (result, lhs, lhs_size); | |
10329 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
10330 | return result; | |
10331 | } | |
10332 | ||
4b794eaf | 10333 | /* Issue the error given by GMSGID, indicating that it occurred before |
4bb8ca28 MM |
10334 | TOKEN, which had the associated VALUE. */ |
10335 | ||
10336 | void | |
b8698a0f | 10337 | c_parse_error (const char *gmsgid, enum cpp_ttype token_type, |
cfc93532 | 10338 | tree value, unsigned char token_flags) |
4bb8ca28 | 10339 | { |
0a3ee0fd GDR |
10340 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
10341 | ||
10342 | char *message = NULL; | |
4bb8ca28 | 10343 | |
cfc93532 | 10344 | if (token_type == CPP_EOF) |
4b794eaf | 10345 | message = catenate_messages (gmsgid, " at end of input"); |
b8698a0f L |
10346 | else if (token_type == CPP_CHAR |
10347 | || token_type == CPP_WCHAR | |
cfc93532 | 10348 | || token_type == CPP_CHAR16 |
fe95b036 ESR |
10349 | || token_type == CPP_CHAR32 |
10350 | || token_type == CPP_UTF8CHAR) | |
4bb8ca28 MM |
10351 | { |
10352 | unsigned int val = TREE_INT_CST_LOW (value); | |
b6baa67d KVH |
10353 | const char *prefix; |
10354 | ||
cfc93532 | 10355 | switch (token_type) |
b6baa67d KVH |
10356 | { |
10357 | default: | |
10358 | prefix = ""; | |
10359 | break; | |
10360 | case CPP_WCHAR: | |
10361 | prefix = "L"; | |
10362 | break; | |
10363 | case CPP_CHAR16: | |
10364 | prefix = "u"; | |
10365 | break; | |
10366 | case CPP_CHAR32: | |
10367 | prefix = "U"; | |
10368 | break; | |
fe95b036 ESR |
10369 | case CPP_UTF8CHAR: |
10370 | prefix = "u8"; | |
10371 | break; | |
b6baa67d KVH |
10372 | } |
10373 | ||
4bb8ca28 | 10374 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
c22cacf3 | 10375 | message = catenate_messages (gmsgid, " before %s'%c'"); |
4bb8ca28 | 10376 | else |
c22cacf3 | 10377 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
0a3ee0fd | 10378 | |
b6baa67d | 10379 | error (message, prefix, val); |
0a3ee0fd GDR |
10380 | free (message); |
10381 | message = NULL; | |
4bb8ca28 | 10382 | } |
65e5a578 ESR |
10383 | else if (token_type == CPP_CHAR_USERDEF |
10384 | || token_type == CPP_WCHAR_USERDEF | |
10385 | || token_type == CPP_CHAR16_USERDEF | |
fe95b036 ESR |
10386 | || token_type == CPP_CHAR32_USERDEF |
10387 | || token_type == CPP_UTF8CHAR_USERDEF) | |
65e5a578 ESR |
10388 | message = catenate_messages (gmsgid, |
10389 | " before user-defined character literal"); | |
10390 | else if (token_type == CPP_STRING_USERDEF | |
10391 | || token_type == CPP_WSTRING_USERDEF | |
10392 | || token_type == CPP_STRING16_USERDEF | |
10393 | || token_type == CPP_STRING32_USERDEF | |
10394 | || token_type == CPP_UTF8STRING_USERDEF) | |
10395 | message = catenate_messages (gmsgid, " before user-defined string literal"); | |
b8698a0f L |
10396 | else if (token_type == CPP_STRING |
10397 | || token_type == CPP_WSTRING | |
cfc93532 | 10398 | || token_type == CPP_STRING16 |
2c6e3f55 JJ |
10399 | || token_type == CPP_STRING32 |
10400 | || token_type == CPP_UTF8STRING) | |
4b794eaf | 10401 | message = catenate_messages (gmsgid, " before string constant"); |
cfc93532 | 10402 | else if (token_type == CPP_NUMBER) |
4b794eaf | 10403 | message = catenate_messages (gmsgid, " before numeric constant"); |
cfc93532 | 10404 | else if (token_type == CPP_NAME) |
0a3ee0fd | 10405 | { |
4b794eaf | 10406 | message = catenate_messages (gmsgid, " before %qE"); |
c51a1ba9 | 10407 | error (message, value); |
0a3ee0fd GDR |
10408 | free (message); |
10409 | message = NULL; | |
10410 | } | |
cfc93532 | 10411 | else if (token_type == CPP_PRAGMA) |
bc4071dd | 10412 | message = catenate_messages (gmsgid, " before %<#pragma%>"); |
cfc93532 | 10413 | else if (token_type == CPP_PRAGMA_EOL) |
bc4071dd | 10414 | message = catenate_messages (gmsgid, " before end of line"); |
34429675 JM |
10415 | else if (token_type == CPP_DECLTYPE) |
10416 | message = catenate_messages (gmsgid, " before %<decltype%>"); | |
cfc93532 | 10417 | else if (token_type < N_TTYPES) |
0a3ee0fd | 10418 | { |
4b794eaf | 10419 | message = catenate_messages (gmsgid, " before %qs token"); |
cfc93532 | 10420 | error (message, cpp_type2name (token_type, token_flags)); |
0a3ee0fd GDR |
10421 | free (message); |
10422 | message = NULL; | |
10423 | } | |
4bb8ca28 | 10424 | else |
4b794eaf | 10425 | error (gmsgid); |
0a3ee0fd GDR |
10426 | |
10427 | if (message) | |
10428 | { | |
10429 | error (message); | |
10430 | free (message); | |
10431 | } | |
c22cacf3 | 10432 | #undef catenate_messages |
4bb8ca28 MM |
10433 | } |
10434 | ||
87cf0651 SB |
10435 | /* Return the gcc option code associated with the reason for a cpp |
10436 | message, or 0 if none. */ | |
10437 | ||
10438 | static int | |
10439 | c_option_controlling_cpp_error (int reason) | |
10440 | { | |
b559c810 | 10441 | const struct cpp_reason_option_codes_t *entry; |
87cf0651 | 10442 | |
b559c810 | 10443 | for (entry = cpp_reason_option_codes; entry->reason != CPP_W_NONE; entry++) |
87cf0651 SB |
10444 | { |
10445 | if (entry->reason == reason) | |
10446 | return entry->option_code; | |
10447 | } | |
10448 | return 0; | |
10449 | } | |
10450 | ||
148e4216 | 10451 | /* Callback from cpp_error for PFILE to print diagnostics from the |
87cf0651 SB |
10452 | preprocessor. The diagnostic is of type LEVEL, with REASON set |
10453 | to the reason code if LEVEL is represents a warning, at location | |
148e4216 JM |
10454 | LOCATION unless this is after lexing and the compiler's location |
10455 | should be used instead, with column number possibly overridden by | |
10456 | COLUMN_OVERRIDE if not zero; MSG is the translated message and AP | |
10457 | the arguments. Returns true if a diagnostic was emitted, false | |
10458 | otherwise. */ | |
10459 | ||
10460 | bool | |
87cf0651 | 10461 | c_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level, int reason, |
148e4216 JM |
10462 | location_t location, unsigned int column_override, |
10463 | const char *msg, va_list *ap) | |
10464 | { | |
10465 | diagnostic_info diagnostic; | |
10466 | diagnostic_t dlevel; | |
e3339d0f | 10467 | bool save_warn_system_headers = global_dc->dc_warn_system_headers; |
148e4216 JM |
10468 | bool ret; |
10469 | ||
10470 | switch (level) | |
10471 | { | |
10472 | case CPP_DL_WARNING_SYSHDR: | |
10473 | if (flag_no_output) | |
10474 | return false; | |
e3339d0f | 10475 | global_dc->dc_warn_system_headers = 1; |
148e4216 JM |
10476 | /* Fall through. */ |
10477 | case CPP_DL_WARNING: | |
10478 | if (flag_no_output) | |
10479 | return false; | |
10480 | dlevel = DK_WARNING; | |
10481 | break; | |
10482 | case CPP_DL_PEDWARN: | |
10483 | if (flag_no_output && !flag_pedantic_errors) | |
10484 | return false; | |
10485 | dlevel = DK_PEDWARN; | |
10486 | break; | |
10487 | case CPP_DL_ERROR: | |
10488 | dlevel = DK_ERROR; | |
10489 | break; | |
10490 | case CPP_DL_ICE: | |
10491 | dlevel = DK_ICE; | |
10492 | break; | |
10493 | case CPP_DL_NOTE: | |
10494 | dlevel = DK_NOTE; | |
10495 | break; | |
47580d22 JM |
10496 | case CPP_DL_FATAL: |
10497 | dlevel = DK_FATAL; | |
10498 | break; | |
148e4216 JM |
10499 | default: |
10500 | gcc_unreachable (); | |
10501 | } | |
10502 | if (done_lexing) | |
10503 | location = input_location; | |
10504 | diagnostic_set_info_translated (&diagnostic, msg, ap, | |
10505 | location, dlevel); | |
10506 | if (column_override) | |
10507 | diagnostic_override_column (&diagnostic, column_override); | |
87cf0651 SB |
10508 | diagnostic_override_option_index (&diagnostic, |
10509 | c_option_controlling_cpp_error (reason)); | |
148e4216 JM |
10510 | ret = report_diagnostic (&diagnostic); |
10511 | if (level == CPP_DL_WARNING_SYSHDR) | |
e3339d0f | 10512 | global_dc->dc_warn_system_headers = save_warn_system_headers; |
148e4216 JM |
10513 | return ret; |
10514 | } | |
10515 | ||
c5ff069d ZW |
10516 | /* Convert a character from the host to the target execution character |
10517 | set. cpplib handles this, mostly. */ | |
10518 | ||
10519 | HOST_WIDE_INT | |
10520 | c_common_to_target_charset (HOST_WIDE_INT c) | |
10521 | { | |
10522 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
10523 | zero-extended under -fno-signed-char. cpplib insists that characters | |
10524 | and character constants are always unsigned. Hence we must convert | |
10525 | back and forth. */ | |
10526 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
10527 | ||
10528 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
10529 | ||
10530 | if (flag_signed_char) | |
10531 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
10532 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
10533 | else | |
10534 | return uc; | |
10535 | } | |
10536 | ||
cf9e9959 EB |
10537 | /* Fold an offsetof-like expression. EXPR is a nested sequence of component |
10538 | references with an INDIRECT_REF of a constant at the bottom; much like the | |
10539 | traditional rendering of offsetof as a macro. Return the folded result. */ | |
ee8a6a3e | 10540 | |
cf9e9959 EB |
10541 | tree |
10542 | fold_offsetof_1 (tree expr) | |
ee8a6a3e | 10543 | { |
ee8a6a3e RH |
10544 | tree base, off, t; |
10545 | ||
10546 | switch (TREE_CODE (expr)) | |
10547 | { | |
10548 | case ERROR_MARK: | |
10549 | return expr; | |
10550 | ||
545b7d8c VR |
10551 | case VAR_DECL: |
10552 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
10553 | return error_mark_node; | |
10554 | ||
6d4d7b0e | 10555 | case CALL_EXPR: |
8d5f60ac | 10556 | case TARGET_EXPR: |
6d4d7b0e PB |
10557 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); |
10558 | return error_mark_node; | |
10559 | ||
6d4d7b0e PB |
10560 | case NOP_EXPR: |
10561 | case INDIRECT_REF: | |
cf9e9959 | 10562 | if (!TREE_CONSTANT (TREE_OPERAND (expr, 0))) |
61c3c490 DS |
10563 | { |
10564 | error ("cannot apply %<offsetof%> to a non constant address"); | |
10565 | return error_mark_node; | |
10566 | } | |
cf9e9959 | 10567 | return TREE_OPERAND (expr, 0); |
6d4d7b0e | 10568 | |
ee8a6a3e | 10569 | case COMPONENT_REF: |
cf9e9959 | 10570 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
ee8a6a3e RH |
10571 | if (base == error_mark_node) |
10572 | return base; | |
10573 | ||
10574 | t = TREE_OPERAND (expr, 1); | |
10575 | if (DECL_C_BIT_FIELD (t)) | |
10576 | { | |
10577 | error ("attempt to take address of bit-field structure " | |
c51a1ba9 | 10578 | "member %qD", t); |
ee8a6a3e RH |
10579 | return error_mark_node; |
10580 | } | |
db3927fb | 10581 | off = size_binop_loc (input_location, PLUS_EXPR, DECL_FIELD_OFFSET (t), |
386b1f1f | 10582 | size_int (tree_to_uhwi (DECL_FIELD_BIT_OFFSET (t)) |
db3927fb | 10583 | / BITS_PER_UNIT)); |
ee8a6a3e RH |
10584 | break; |
10585 | ||
10586 | case ARRAY_REF: | |
cf9e9959 | 10587 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
ee8a6a3e RH |
10588 | if (base == error_mark_node) |
10589 | return base; | |
10590 | ||
10591 | t = TREE_OPERAND (expr, 1); | |
61c3c490 DS |
10592 | |
10593 | /* Check if the offset goes beyond the upper bound of the array. */ | |
cf9e9959 | 10594 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) >= 0) |
d32599a6 JJ |
10595 | { |
10596 | tree upbound = array_ref_up_bound (expr); | |
10597 | if (upbound != NULL_TREE | |
10598 | && TREE_CODE (upbound) == INTEGER_CST | |
10599 | && !tree_int_cst_equal (upbound, | |
10600 | TYPE_MAX_VALUE (TREE_TYPE (upbound)))) | |
10601 | { | |
10602 | upbound = size_binop (PLUS_EXPR, upbound, | |
10603 | build_int_cst (TREE_TYPE (upbound), 1)); | |
10604 | if (tree_int_cst_lt (upbound, t)) | |
10605 | { | |
10606 | tree v; | |
10607 | ||
10608 | for (v = TREE_OPERAND (expr, 0); | |
10609 | TREE_CODE (v) == COMPONENT_REF; | |
10610 | v = TREE_OPERAND (v, 0)) | |
10611 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (v, 0))) | |
10612 | == RECORD_TYPE) | |
10613 | { | |
910ad8de NF |
10614 | tree fld_chain = DECL_CHAIN (TREE_OPERAND (v, 1)); |
10615 | for (; fld_chain; fld_chain = DECL_CHAIN (fld_chain)) | |
d32599a6 JJ |
10616 | if (TREE_CODE (fld_chain) == FIELD_DECL) |
10617 | break; | |
10618 | ||
10619 | if (fld_chain) | |
10620 | break; | |
10621 | } | |
10622 | /* Don't warn if the array might be considered a poor | |
10623 | man's flexible array member with a very permissive | |
10624 | definition thereof. */ | |
10625 | if (TREE_CODE (v) == ARRAY_REF | |
10626 | || TREE_CODE (v) == COMPONENT_REF) | |
10627 | warning (OPT_Warray_bounds, | |
10628 | "index %E denotes an offset " | |
10629 | "greater than size of %qT", | |
10630 | t, TREE_TYPE (TREE_OPERAND (expr, 0))); | |
10631 | } | |
10632 | } | |
10633 | } | |
cf9e9959 EB |
10634 | |
10635 | t = convert (sizetype, t); | |
10636 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
ee8a6a3e RH |
10637 | break; |
10638 | ||
1916c916 VR |
10639 | case COMPOUND_EXPR: |
10640 | /* Handle static members of volatile structs. */ | |
10641 | t = TREE_OPERAND (expr, 1); | |
0ae9bd27 | 10642 | gcc_assert (VAR_P (t)); |
cf9e9959 | 10643 | return fold_offsetof_1 (t); |
1916c916 | 10644 | |
ee8a6a3e | 10645 | default: |
366de0ce | 10646 | gcc_unreachable (); |
ee8a6a3e RH |
10647 | } |
10648 | ||
cf9e9959 | 10649 | return fold_build_pointer_plus (base, off); |
ee8a6a3e RH |
10650 | } |
10651 | ||
cf9e9959 EB |
10652 | /* Likewise, but convert it to the return type of offsetof. */ |
10653 | ||
ee8a6a3e | 10654 | tree |
cf9e9959 | 10655 | fold_offsetof (tree expr) |
ee8a6a3e | 10656 | { |
cf9e9959 | 10657 | return convert (size_type_node, fold_offsetof_1 (expr)); |
ee8a6a3e RH |
10658 | } |
10659 | ||
d166d4c3 AK |
10660 | /* Warn for A ?: C expressions (with B omitted) where A is a boolean |
10661 | expression, because B will always be true. */ | |
10662 | ||
10663 | void | |
10664 | warn_for_omitted_condop (location_t location, tree cond) | |
10665 | { | |
10666 | if (truth_value_p (TREE_CODE (cond))) | |
10667 | warning_at (location, OPT_Wparentheses, | |
10668 | "the omitted middle operand in ?: will always be %<true%>, " | |
10669 | "suggest explicit middle operand"); | |
10670 | } | |
10671 | ||
4816c593 NF |
10672 | /* Give an error for storing into ARG, which is 'const'. USE indicates |
10673 | how ARG was being used. */ | |
10674 | ||
10675 | void | |
c02065fc | 10676 | readonly_error (location_t loc, tree arg, enum lvalue_use use) |
4816c593 NF |
10677 | { |
10678 | gcc_assert (use == lv_assign || use == lv_increment || use == lv_decrement | |
10679 | || use == lv_asm); | |
10680 | /* Using this macro rather than (for example) arrays of messages | |
10681 | ensures that all the format strings are checked at compile | |
10682 | time. */ | |
10683 | #define READONLY_MSG(A, I, D, AS) (use == lv_assign ? (A) \ | |
10684 | : (use == lv_increment ? (I) \ | |
10685 | : (use == lv_decrement ? (D) : (AS)))) | |
10686 | if (TREE_CODE (arg) == COMPONENT_REF) | |
10687 | { | |
10688 | if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0)))) | |
c02065fc AH |
10689 | error_at (loc, READONLY_MSG (G_("assignment of member " |
10690 | "%qD in read-only object"), | |
10691 | G_("increment of member " | |
10692 | "%qD in read-only object"), | |
10693 | G_("decrement of member " | |
10694 | "%qD in read-only object"), | |
10695 | G_("member %qD in read-only object " | |
10696 | "used as %<asm%> output")), | |
10697 | TREE_OPERAND (arg, 1)); | |
4816c593 | 10698 | else |
c02065fc AH |
10699 | error_at (loc, READONLY_MSG (G_("assignment of read-only member %qD"), |
10700 | G_("increment of read-only member %qD"), | |
10701 | G_("decrement of read-only member %qD"), | |
10702 | G_("read-only member %qD used as %<asm%> output")), | |
10703 | TREE_OPERAND (arg, 1)); | |
4816c593 | 10704 | } |
0ae9bd27 | 10705 | else if (VAR_P (arg)) |
c02065fc AH |
10706 | error_at (loc, READONLY_MSG (G_("assignment of read-only variable %qD"), |
10707 | G_("increment of read-only variable %qD"), | |
10708 | G_("decrement of read-only variable %qD"), | |
10709 | G_("read-only variable %qD used as %<asm%> output")), | |
10710 | arg); | |
4816c593 | 10711 | else if (TREE_CODE (arg) == PARM_DECL) |
c02065fc AH |
10712 | error_at (loc, READONLY_MSG (G_("assignment of read-only parameter %qD"), |
10713 | G_("increment of read-only parameter %qD"), | |
10714 | G_("decrement of read-only parameter %qD"), | |
10715 | G_("read-only parameter %qD use as %<asm%> output")), | |
10716 | arg); | |
4816c593 NF |
10717 | else if (TREE_CODE (arg) == RESULT_DECL) |
10718 | { | |
10719 | gcc_assert (c_dialect_cxx ()); | |
c02065fc AH |
10720 | error_at (loc, READONLY_MSG (G_("assignment of " |
10721 | "read-only named return value %qD"), | |
10722 | G_("increment of " | |
10723 | "read-only named return value %qD"), | |
10724 | G_("decrement of " | |
10725 | "read-only named return value %qD"), | |
10726 | G_("read-only named return value %qD " | |
10727 | "used as %<asm%>output")), | |
10728 | arg); | |
4816c593 NF |
10729 | } |
10730 | else if (TREE_CODE (arg) == FUNCTION_DECL) | |
c02065fc AH |
10731 | error_at (loc, READONLY_MSG (G_("assignment of function %qD"), |
10732 | G_("increment of function %qD"), | |
10733 | G_("decrement of function %qD"), | |
10734 | G_("function %qD used as %<asm%> output")), | |
10735 | arg); | |
4816c593 | 10736 | else |
c02065fc AH |
10737 | error_at (loc, READONLY_MSG (G_("assignment of read-only location %qE"), |
10738 | G_("increment of read-only location %qE"), | |
10739 | G_("decrement of read-only location %qE"), | |
10740 | G_("read-only location %qE used as %<asm%> output")), | |
10741 | arg); | |
4816c593 NF |
10742 | } |
10743 | ||
37dc0d8d | 10744 | /* Print an error message for an invalid lvalue. USE says |
7bd11157 TT |
10745 | how the lvalue is being used and so selects the error message. LOC |
10746 | is the location for the error. */ | |
5ae9ba3e | 10747 | |
37dc0d8d | 10748 | void |
7bd11157 | 10749 | lvalue_error (location_t loc, enum lvalue_use use) |
5ae9ba3e | 10750 | { |
37dc0d8d | 10751 | switch (use) |
5ae9ba3e | 10752 | { |
37dc0d8d | 10753 | case lv_assign: |
7bd11157 | 10754 | error_at (loc, "lvalue required as left operand of assignment"); |
37dc0d8d JM |
10755 | break; |
10756 | case lv_increment: | |
7bd11157 | 10757 | error_at (loc, "lvalue required as increment operand"); |
37dc0d8d JM |
10758 | break; |
10759 | case lv_decrement: | |
7bd11157 | 10760 | error_at (loc, "lvalue required as decrement operand"); |
37dc0d8d JM |
10761 | break; |
10762 | case lv_addressof: | |
7bd11157 | 10763 | error_at (loc, "lvalue required as unary %<&%> operand"); |
37dc0d8d JM |
10764 | break; |
10765 | case lv_asm: | |
7bd11157 | 10766 | error_at (loc, "lvalue required in asm statement"); |
37dc0d8d JM |
10767 | break; |
10768 | default: | |
10769 | gcc_unreachable (); | |
5ae9ba3e | 10770 | } |
5ae9ba3e | 10771 | } |
7a6daeb0 NF |
10772 | |
10773 | /* Print an error message for an invalid indirection of type TYPE. | |
10774 | ERRSTRING is the name of the operator for the indirection. */ | |
10775 | ||
10776 | void | |
10777 | invalid_indirection_error (location_t loc, tree type, ref_operator errstring) | |
10778 | { | |
10779 | switch (errstring) | |
10780 | { | |
10781 | case RO_NULL: | |
10782 | gcc_assert (c_dialect_cxx ()); | |
10783 | error_at (loc, "invalid type argument (have %qT)", type); | |
10784 | break; | |
10785 | case RO_ARRAY_INDEXING: | |
10786 | error_at (loc, | |
10787 | "invalid type argument of array indexing (have %qT)", | |
10788 | type); | |
10789 | break; | |
10790 | case RO_UNARY_STAR: | |
10791 | error_at (loc, | |
10792 | "invalid type argument of unary %<*%> (have %qT)", | |
10793 | type); | |
10794 | break; | |
10795 | case RO_ARROW: | |
10796 | error_at (loc, | |
10797 | "invalid type argument of %<->%> (have %qT)", | |
10798 | type); | |
10799 | break; | |
55a7f02f MP |
10800 | case RO_ARROW_STAR: |
10801 | error_at (loc, | |
10802 | "invalid type argument of %<->*%> (have %qT)", | |
10803 | type); | |
10804 | break; | |
7a6daeb0 NF |
10805 | case RO_IMPLICIT_CONVERSION: |
10806 | error_at (loc, | |
10807 | "invalid type argument of implicit conversion (have %qT)", | |
10808 | type); | |
10809 | break; | |
10810 | default: | |
10811 | gcc_unreachable (); | |
10812 | } | |
10813 | } | |
aab038d5 RH |
10814 | \f |
10815 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
10816 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
10817 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
10818 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
10819 | ||
10820 | int | |
10821 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
10822 | { | |
10823 | tree maxindex, type, main_type, elt, unqual_elt; | |
10824 | int failure = 0, quals; | |
06d40de8 | 10825 | hashval_t hashcode = 0; |
40d3d530 | 10826 | bool overflow_p = false; |
aab038d5 RH |
10827 | |
10828 | maxindex = size_zero_node; | |
10829 | if (initial_value) | |
10830 | { | |
10831 | if (TREE_CODE (initial_value) == STRING_CST) | |
10832 | { | |
10833 | int eltsize | |
10834 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
10835 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
10836 | } | |
10837 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
10838 | { | |
9771b263 | 10839 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initial_value); |
aab038d5 | 10840 | |
9771b263 | 10841 | if (vec_safe_is_empty (v)) |
aab038d5 RH |
10842 | { |
10843 | if (pedantic) | |
10844 | failure = 3; | |
830c740f | 10845 | maxindex = ssize_int (-1); |
aab038d5 RH |
10846 | } |
10847 | else | |
10848 | { | |
10849 | tree curindex; | |
4038c495 GB |
10850 | unsigned HOST_WIDE_INT cnt; |
10851 | constructor_elt *ce; | |
cff7525f | 10852 | bool fold_p = false; |
aab038d5 | 10853 | |
9771b263 | 10854 | if ((*v)[0].index) |
40d3d530 JR |
10855 | maxindex = (*v)[0].index, fold_p = true; |
10856 | ||
aab038d5 RH |
10857 | curindex = maxindex; |
10858 | ||
9771b263 | 10859 | for (cnt = 1; vec_safe_iterate (v, cnt, &ce); cnt++) |
aab038d5 | 10860 | { |
cff7525f | 10861 | bool curfold_p = false; |
4038c495 | 10862 | if (ce->index) |
cff7525f | 10863 | curindex = ce->index, curfold_p = true; |
aab038d5 | 10864 | else |
cff7525f JH |
10865 | { |
10866 | if (fold_p) | |
40d3d530 JR |
10867 | { |
10868 | /* Since we treat size types now as ordinary | |
10869 | unsigned types, we need an explicit overflow | |
10870 | check. */ | |
10871 | tree orig = curindex; | |
10872 | curindex = fold_convert (sizetype, curindex); | |
10873 | overflow_p |= tree_int_cst_lt (curindex, orig); | |
10874 | } | |
db3927fb AH |
10875 | curindex = size_binop (PLUS_EXPR, curindex, |
10876 | size_one_node); | |
cff7525f | 10877 | } |
aab038d5 | 10878 | if (tree_int_cst_lt (maxindex, curindex)) |
cff7525f | 10879 | maxindex = curindex, fold_p = curfold_p; |
aab038d5 | 10880 | } |
40d3d530 JR |
10881 | if (fold_p) |
10882 | { | |
10883 | tree orig = maxindex; | |
10884 | maxindex = fold_convert (sizetype, maxindex); | |
10885 | overflow_p |= tree_int_cst_lt (maxindex, orig); | |
10886 | } | |
aab038d5 RH |
10887 | } |
10888 | } | |
10889 | else | |
10890 | { | |
10891 | /* Make an error message unless that happened already. */ | |
10892 | if (initial_value != error_mark_node) | |
10893 | failure = 1; | |
10894 | } | |
10895 | } | |
10896 | else | |
10897 | { | |
10898 | failure = 2; | |
10899 | if (!do_default) | |
10900 | return failure; | |
10901 | } | |
10902 | ||
10903 | type = *ptype; | |
10904 | elt = TREE_TYPE (type); | |
10905 | quals = TYPE_QUALS (strip_array_types (elt)); | |
10906 | if (quals == 0) | |
10907 | unqual_elt = elt; | |
10908 | else | |
36c5e70a | 10909 | unqual_elt = c_build_qualified_type (elt, KEEP_QUAL_ADDR_SPACE (quals)); |
aab038d5 RH |
10910 | |
10911 | /* Using build_distinct_type_copy and modifying things afterward instead | |
10912 | of using build_array_type to create a new type preserves all of the | |
10913 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
10914 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
10915 | TREE_TYPE (main_type) = unqual_elt; | |
e6313a78 RG |
10916 | TYPE_DOMAIN (main_type) |
10917 | = build_range_type (TREE_TYPE (maxindex), | |
10918 | build_int_cst (TREE_TYPE (maxindex), 0), maxindex); | |
aab038d5 RH |
10919 | layout_type (main_type); |
10920 | ||
06d40de8 DG |
10921 | /* Make sure we have the canonical MAIN_TYPE. */ |
10922 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
b8698a0f | 10923 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), |
06d40de8 DG |
10924 | hashcode); |
10925 | main_type = type_hash_canon (hashcode, main_type); | |
10926 | ||
9ae165a0 DG |
10927 | /* Fix the canonical type. */ |
10928 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
10929 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
10930 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
10931 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
10932 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
10933 | != TYPE_DOMAIN (main_type))) | |
b8698a0f | 10934 | TYPE_CANONICAL (main_type) |
9ae165a0 DG |
10935 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), |
10936 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
10937 | else | |
10938 | TYPE_CANONICAL (main_type) = main_type; | |
10939 | ||
aab038d5 RH |
10940 | if (quals == 0) |
10941 | type = main_type; | |
10942 | else | |
10943 | type = c_build_qualified_type (main_type, quals); | |
10944 | ||
7bfcb402 JM |
10945 | if (COMPLETE_TYPE_P (type) |
10946 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
40d3d530 | 10947 | && (overflow_p || TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))) |
7bfcb402 JM |
10948 | { |
10949 | error ("size of array is too large"); | |
10950 | /* If we proceed with the array type as it is, we'll eventually | |
386b1f1f | 10951 | crash in tree_to_[su]hwi(). */ |
7bfcb402 JM |
10952 | type = error_mark_node; |
10953 | } | |
10954 | ||
aab038d5 RH |
10955 | *ptype = type; |
10956 | return failure; | |
10957 | } | |
5ae9ba3e | 10958 | |
30cd1c5d AS |
10959 | /* Like c_mark_addressable but don't check register qualifier. */ |
10960 | void | |
10961 | c_common_mark_addressable_vec (tree t) | |
10962 | { | |
10963 | while (handled_component_p (t)) | |
10964 | t = TREE_OPERAND (t, 0); | |
0ae9bd27 | 10965 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
30cd1c5d AS |
10966 | return; |
10967 | TREE_ADDRESSABLE (t) = 1; | |
10968 | } | |
10969 | ||
10970 | ||
48ae6c13 RH |
10971 | \f |
10972 | /* Used to help initialize the builtin-types.def table. When a type of | |
10973 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
10974 | The later results in segfaults even when a decl using the type doesn't | |
10975 | get invoked. */ | |
10976 | ||
10977 | tree | |
10978 | builtin_type_for_size (int size, bool unsignedp) | |
10979 | { | |
21fa2faf | 10980 | tree type = c_common_type_for_size (size, unsignedp); |
48ae6c13 RH |
10981 | return type ? type : error_mark_node; |
10982 | } | |
10983 | ||
10984 | /* A helper function for resolve_overloaded_builtin in resolving the | |
10985 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
10986 | first operand of PARAMS is a pointer to a supported data type. | |
10987 | Returns 0 if an error is encountered. */ | |
10988 | ||
10989 | static int | |
9771b263 | 10990 | sync_resolve_size (tree function, vec<tree, va_gc> *params) |
48ae6c13 RH |
10991 | { |
10992 | tree type; | |
10993 | int size; | |
10994 | ||
9771b263 | 10995 | if (!params) |
48ae6c13 RH |
10996 | { |
10997 | error ("too few arguments to function %qE", function); | |
10998 | return 0; | |
10999 | } | |
11000 | ||
9771b263 | 11001 | type = TREE_TYPE ((*params)[0]); |
6415bd5d JM |
11002 | if (TREE_CODE (type) == ARRAY_TYPE) |
11003 | { | |
11004 | /* Force array-to-pointer decay for C++. */ | |
11005 | gcc_assert (c_dialect_cxx()); | |
11006 | (*params)[0] = default_conversion ((*params)[0]); | |
11007 | type = TREE_TYPE ((*params)[0]); | |
11008 | } | |
48ae6c13 RH |
11009 | if (TREE_CODE (type) != POINTER_TYPE) |
11010 | goto incompatible; | |
11011 | ||
11012 | type = TREE_TYPE (type); | |
11013 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
11014 | goto incompatible; | |
11015 | ||
ae7e9ddd | 11016 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
a0274e3e | 11017 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
48ae6c13 RH |
11018 | return size; |
11019 | ||
11020 | incompatible: | |
11021 | error ("incompatible type for argument %d of %qE", 1, function); | |
11022 | return 0; | |
11023 | } | |
11024 | ||
c22cacf3 | 11025 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
48ae6c13 RH |
11026 | PARAMS to make arguments match up with those of FUNCTION. Drops |
11027 | the variadic arguments at the end. Returns false if some error | |
11028 | was encountered; true on success. */ | |
11029 | ||
11030 | static bool | |
86951993 | 11031 | sync_resolve_params (location_t loc, tree orig_function, tree function, |
9771b263 | 11032 | vec<tree, va_gc> *params, bool orig_format) |
48ae6c13 | 11033 | { |
e19a18d4 | 11034 | function_args_iterator iter; |
48ae6c13 | 11035 | tree ptype; |
bbbbb16a | 11036 | unsigned int parmnum; |
48ae6c13 | 11037 | |
e19a18d4 | 11038 | function_args_iter_init (&iter, TREE_TYPE (function)); |
48ae6c13 RH |
11039 | /* We've declared the implementation functions to use "volatile void *" |
11040 | as the pointer parameter, so we shouldn't get any complaints from the | |
11041 | call to check_function_arguments what ever type the user used. */ | |
e19a18d4 | 11042 | function_args_iter_next (&iter); |
9771b263 | 11043 | ptype = TREE_TYPE (TREE_TYPE ((*params)[0])); |
267bac10 | 11044 | ptype = TYPE_MAIN_VARIANT (ptype); |
48ae6c13 RH |
11045 | |
11046 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
11047 | don't get warnings for passing pointer types, etc. */ | |
bbbbb16a | 11048 | parmnum = 0; |
e19a18d4 | 11049 | while (1) |
48ae6c13 | 11050 | { |
e19a18d4 NF |
11051 | tree val, arg_type; |
11052 | ||
11053 | arg_type = function_args_iter_cond (&iter); | |
11054 | /* XXX void_type_node belies the abstraction. */ | |
11055 | if (arg_type == void_type_node) | |
11056 | break; | |
48ae6c13 | 11057 | |
bbbbb16a | 11058 | ++parmnum; |
9771b263 | 11059 | if (params->length () <= parmnum) |
48ae6c13 | 11060 | { |
86951993 | 11061 | error_at (loc, "too few arguments to function %qE", orig_function); |
48ae6c13 RH |
11062 | return false; |
11063 | } | |
11064 | ||
e3793c6f JJ |
11065 | /* Only convert parameters if arg_type is unsigned integer type with |
11066 | new format sync routines, i.e. don't attempt to convert pointer | |
11067 | arguments (e.g. EXPECTED argument of __atomic_compare_exchange_n), | |
11068 | bool arguments (e.g. WEAK argument) or signed int arguments (memmodel | |
11069 | kinds). */ | |
11070 | if (TREE_CODE (arg_type) == INTEGER_TYPE && TYPE_UNSIGNED (arg_type)) | |
86951993 AM |
11071 | { |
11072 | /* Ideally for the first conversion we'd use convert_for_assignment | |
11073 | so that we get warnings for anything that doesn't match the pointer | |
11074 | type. This isn't portable across the C and C++ front ends atm. */ | |
9771b263 | 11075 | val = (*params)[parmnum]; |
86951993 AM |
11076 | val = convert (ptype, val); |
11077 | val = convert (arg_type, val); | |
9771b263 | 11078 | (*params)[parmnum] = val; |
86951993 | 11079 | } |
48ae6c13 | 11080 | |
e19a18d4 | 11081 | function_args_iter_next (&iter); |
48ae6c13 RH |
11082 | } |
11083 | ||
86951993 | 11084 | /* __atomic routines are not variadic. */ |
9771b263 | 11085 | if (!orig_format && params->length () != parmnum + 1) |
86951993 AM |
11086 | { |
11087 | error_at (loc, "too many arguments to function %qE", orig_function); | |
11088 | return false; | |
11089 | } | |
11090 | ||
48ae6c13 RH |
11091 | /* The definition of these primitives is variadic, with the remaining |
11092 | being "an optional list of variables protected by the memory barrier". | |
11093 | No clue what that's supposed to mean, precisely, but we consider all | |
11094 | call-clobbered variables to be protected so we're safe. */ | |
9771b263 | 11095 | params->truncate (parmnum + 1); |
48ae6c13 RH |
11096 | |
11097 | return true; | |
11098 | } | |
11099 | ||
c22cacf3 | 11100 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
48ae6c13 RH |
11101 | RESULT to make it match the type of the first pointer argument in |
11102 | PARAMS. */ | |
11103 | ||
11104 | static tree | |
86951993 | 11105 | sync_resolve_return (tree first_param, tree result, bool orig_format) |
48ae6c13 | 11106 | { |
bbbbb16a | 11107 | tree ptype = TREE_TYPE (TREE_TYPE (first_param)); |
86951993 | 11108 | tree rtype = TREE_TYPE (result); |
99db1ef0 | 11109 | ptype = TYPE_MAIN_VARIANT (ptype); |
86951993 AM |
11110 | |
11111 | /* New format doesn't require casting unless the types are the same size. */ | |
11112 | if (orig_format || tree_int_cst_equal (TYPE_SIZE (ptype), TYPE_SIZE (rtype))) | |
11113 | return convert (ptype, result); | |
11114 | else | |
11115 | return result; | |
11116 | } | |
11117 | ||
11118 | /* This function verifies the PARAMS to generic atomic FUNCTION. | |
11119 | It returns the size if all the parameters are the same size, otherwise | |
11120 | 0 is returned if the parameters are invalid. */ | |
11121 | ||
11122 | static int | |
9771b263 DN |
11123 | get_atomic_generic_size (location_t loc, tree function, |
11124 | vec<tree, va_gc> *params) | |
86951993 AM |
11125 | { |
11126 | unsigned int n_param; | |
11127 | unsigned int n_model; | |
11128 | unsigned int x; | |
11129 | int size_0; | |
11130 | tree type_0; | |
11131 | ||
11132 | /* Determine the parameter makeup. */ | |
11133 | switch (DECL_FUNCTION_CODE (function)) | |
11134 | { | |
11135 | case BUILT_IN_ATOMIC_EXCHANGE: | |
11136 | n_param = 4; | |
11137 | n_model = 1; | |
11138 | break; | |
11139 | case BUILT_IN_ATOMIC_LOAD: | |
11140 | case BUILT_IN_ATOMIC_STORE: | |
11141 | n_param = 3; | |
11142 | n_model = 1; | |
11143 | break; | |
11144 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
11145 | n_param = 6; | |
11146 | n_model = 2; | |
11147 | break; | |
11148 | default: | |
c466c4ff | 11149 | gcc_unreachable (); |
86951993 AM |
11150 | } |
11151 | ||
9771b263 | 11152 | if (vec_safe_length (params) != n_param) |
86951993 AM |
11153 | { |
11154 | error_at (loc, "incorrect number of arguments to function %qE", function); | |
11155 | return 0; | |
11156 | } | |
11157 | ||
11158 | /* Get type of first parameter, and determine its size. */ | |
9771b263 | 11159 | type_0 = TREE_TYPE ((*params)[0]); |
6415bd5d JM |
11160 | if (TREE_CODE (type_0) == ARRAY_TYPE) |
11161 | { | |
11162 | /* Force array-to-pointer decay for C++. */ | |
11163 | gcc_assert (c_dialect_cxx()); | |
11164 | (*params)[0] = default_conversion ((*params)[0]); | |
11165 | type_0 = TREE_TYPE ((*params)[0]); | |
11166 | } | |
c466c4ff AM |
11167 | if (TREE_CODE (type_0) != POINTER_TYPE || VOID_TYPE_P (TREE_TYPE (type_0))) |
11168 | { | |
11169 | error_at (loc, "argument 1 of %qE must be a non-void pointer type", | |
11170 | function); | |
11171 | return 0; | |
11172 | } | |
11173 | ||
11174 | /* Types must be compile time constant sizes. */ | |
11175 | if (TREE_CODE ((TYPE_SIZE_UNIT (TREE_TYPE (type_0)))) != INTEGER_CST) | |
86951993 | 11176 | { |
c466c4ff AM |
11177 | error_at (loc, |
11178 | "argument 1 of %qE must be a pointer to a constant size type", | |
11179 | function); | |
86951993 AM |
11180 | return 0; |
11181 | } | |
c466c4ff | 11182 | |
ae7e9ddd | 11183 | size_0 = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type_0))); |
86951993 | 11184 | |
c466c4ff AM |
11185 | /* Zero size objects are not allowed. */ |
11186 | if (size_0 == 0) | |
11187 | { | |
11188 | error_at (loc, | |
11189 | "argument 1 of %qE must be a pointer to a nonzero size object", | |
11190 | function); | |
11191 | return 0; | |
11192 | } | |
11193 | ||
86951993 AM |
11194 | /* Check each other parameter is a pointer and the same size. */ |
11195 | for (x = 0; x < n_param - n_model; x++) | |
11196 | { | |
11197 | int size; | |
9771b263 | 11198 | tree type = TREE_TYPE ((*params)[x]); |
688010ba | 11199 | /* __atomic_compare_exchange has a bool in the 4th position, skip it. */ |
86951993 AM |
11200 | if (n_param == 6 && x == 3) |
11201 | continue; | |
11202 | if (!POINTER_TYPE_P (type)) | |
11203 | { | |
11204 | error_at (loc, "argument %d of %qE must be a pointer type", x + 1, | |
11205 | function); | |
11206 | return 0; | |
11207 | } | |
7b56b2f8 MP |
11208 | tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
11209 | size = type_size ? tree_to_uhwi (type_size) : 0; | |
86951993 AM |
11210 | if (size != size_0) |
11211 | { | |
11212 | error_at (loc, "size mismatch in argument %d of %qE", x + 1, | |
11213 | function); | |
11214 | return 0; | |
11215 | } | |
11216 | } | |
11217 | ||
11218 | /* Check memory model parameters for validity. */ | |
11219 | for (x = n_param - n_model ; x < n_param; x++) | |
11220 | { | |
9771b263 | 11221 | tree p = (*params)[x]; |
86951993 AM |
11222 | if (TREE_CODE (p) == INTEGER_CST) |
11223 | { | |
ae7e9ddd | 11224 | int i = tree_to_uhwi (p); |
46b35980 | 11225 | if (i < 0 || (memmodel_base (i) >= MEMMODEL_LAST)) |
86951993 AM |
11226 | { |
11227 | warning_at (loc, OPT_Winvalid_memory_model, | |
11228 | "invalid memory model argument %d of %qE", x + 1, | |
11229 | function); | |
86951993 AM |
11230 | } |
11231 | } | |
11232 | else | |
11233 | if (!INTEGRAL_TYPE_P (TREE_TYPE (p))) | |
11234 | { | |
11235 | error_at (loc, "non-integer memory model argument %d of %qE", x + 1, | |
11236 | function); | |
11237 | return 0; | |
11238 | } | |
11239 | } | |
11240 | ||
11241 | return size_0; | |
11242 | } | |
11243 | ||
11244 | ||
11245 | /* This will take an __atomic_ generic FUNCTION call, and add a size parameter N | |
11246 | at the beginning of the parameter list PARAMS representing the size of the | |
11247 | objects. This is to match the library ABI requirement. LOC is the location | |
11248 | of the function call. | |
11249 | The new function is returned if it needed rebuilding, otherwise NULL_TREE is | |
11250 | returned to allow the external call to be constructed. */ | |
11251 | ||
11252 | static tree | |
11253 | add_atomic_size_parameter (unsigned n, location_t loc, tree function, | |
9771b263 | 11254 | vec<tree, va_gc> *params) |
86951993 AM |
11255 | { |
11256 | tree size_node; | |
11257 | ||
11258 | /* Insert a SIZE_T parameter as the first param. If there isn't | |
11259 | enough space, allocate a new vector and recursively re-build with that. */ | |
9771b263 | 11260 | if (!params->space (1)) |
86951993 AM |
11261 | { |
11262 | unsigned int z, len; | |
9771b263 | 11263 | vec<tree, va_gc> *v; |
86951993 AM |
11264 | tree f; |
11265 | ||
9771b263 DN |
11266 | len = params->length (); |
11267 | vec_alloc (v, len + 1); | |
8edbfaa6 | 11268 | v->quick_push (build_int_cst (size_type_node, n)); |
86951993 | 11269 | for (z = 0; z < len; z++) |
9771b263 | 11270 | v->quick_push ((*params)[z]); |
81e5eca8 | 11271 | f = build_function_call_vec (loc, vNULL, function, v, NULL); |
9771b263 | 11272 | vec_free (v); |
86951993 AM |
11273 | return f; |
11274 | } | |
11275 | ||
11276 | /* Add the size parameter and leave as a function call for processing. */ | |
11277 | size_node = build_int_cst (size_type_node, n); | |
9771b263 | 11278 | params->quick_insert (0, size_node); |
86951993 AM |
11279 | return NULL_TREE; |
11280 | } | |
11281 | ||
11282 | ||
6b28e197 JM |
11283 | /* Return whether atomic operations for naturally aligned N-byte |
11284 | arguments are supported, whether inline or through libatomic. */ | |
11285 | static bool | |
11286 | atomic_size_supported_p (int n) | |
11287 | { | |
11288 | switch (n) | |
11289 | { | |
11290 | case 1: | |
11291 | case 2: | |
11292 | case 4: | |
11293 | case 8: | |
11294 | return true; | |
11295 | ||
11296 | case 16: | |
11297 | return targetm.scalar_mode_supported_p (TImode); | |
11298 | ||
11299 | default: | |
11300 | return false; | |
11301 | } | |
11302 | } | |
11303 | ||
86951993 AM |
11304 | /* This will process an __atomic_exchange function call, determine whether it |
11305 | needs to be mapped to the _N variation, or turned into a library call. | |
11306 | LOC is the location of the builtin call. | |
11307 | FUNCTION is the DECL that has been invoked; | |
11308 | PARAMS is the argument list for the call. The return value is non-null | |
11309 | TRUE is returned if it is translated into the proper format for a call to the | |
11310 | external library, and NEW_RETURN is set the tree for that function. | |
11311 | FALSE is returned if processing for the _N variation is required, and | |
026c3cfd | 11312 | NEW_RETURN is set to the return value the result is copied into. */ |
86951993 AM |
11313 | static bool |
11314 | resolve_overloaded_atomic_exchange (location_t loc, tree function, | |
9771b263 | 11315 | vec<tree, va_gc> *params, tree *new_return) |
86951993 AM |
11316 | { |
11317 | tree p0, p1, p2, p3; | |
11318 | tree I_type, I_type_ptr; | |
11319 | int n = get_atomic_generic_size (loc, function, params); | |
11320 | ||
c466c4ff AM |
11321 | /* Size of 0 is an error condition. */ |
11322 | if (n == 0) | |
11323 | { | |
11324 | *new_return = error_mark_node; | |
11325 | return true; | |
11326 | } | |
11327 | ||
86951993 | 11328 | /* If not a lock-free size, change to the library generic format. */ |
6b28e197 | 11329 | if (!atomic_size_supported_p (n)) |
86951993 AM |
11330 | { |
11331 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11332 | return true; | |
11333 | } | |
11334 | ||
11335 | /* Otherwise there is a lockfree match, transform the call from: | |
11336 | void fn(T* mem, T* desired, T* return, model) | |
11337 | into | |
11338 | *return = (T) (fn (In* mem, (In) *desired, model)) */ | |
11339 | ||
9771b263 DN |
11340 | p0 = (*params)[0]; |
11341 | p1 = (*params)[1]; | |
11342 | p2 = (*params)[2]; | |
11343 | p3 = (*params)[3]; | |
86951993 AM |
11344 | |
11345 | /* Create pointer to appropriate size. */ | |
11346 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11347 | I_type_ptr = build_pointer_type (I_type); | |
11348 | ||
11349 | /* Convert object pointer to required type. */ | |
11350 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
9771b263 | 11351 | (*params)[0] = p0; |
86951993 AM |
11352 | /* Convert new value to required type, and dereference it. */ |
11353 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11354 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
9771b263 | 11355 | (*params)[1] = p1; |
86951993 AM |
11356 | |
11357 | /* Move memory model to the 3rd position, and end param list. */ | |
9771b263 DN |
11358 | (*params)[2] = p3; |
11359 | params->truncate (3); | |
86951993 AM |
11360 | |
11361 | /* Convert return pointer and dereference it for later assignment. */ | |
11362 | *new_return = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
11363 | ||
11364 | return false; | |
48ae6c13 RH |
11365 | } |
11366 | ||
86951993 AM |
11367 | |
11368 | /* This will process an __atomic_compare_exchange function call, determine | |
11369 | whether it needs to be mapped to the _N variation, or turned into a lib call. | |
11370 | LOC is the location of the builtin call. | |
11371 | FUNCTION is the DECL that has been invoked; | |
11372 | PARAMS is the argument list for the call. The return value is non-null | |
11373 | TRUE is returned if it is translated into the proper format for a call to the | |
11374 | external library, and NEW_RETURN is set the tree for that function. | |
11375 | FALSE is returned if processing for the _N variation is required. */ | |
11376 | ||
11377 | static bool | |
11378 | resolve_overloaded_atomic_compare_exchange (location_t loc, tree function, | |
9771b263 | 11379 | vec<tree, va_gc> *params, |
86951993 AM |
11380 | tree *new_return) |
11381 | { | |
11382 | tree p0, p1, p2; | |
11383 | tree I_type, I_type_ptr; | |
11384 | int n = get_atomic_generic_size (loc, function, params); | |
11385 | ||
c466c4ff AM |
11386 | /* Size of 0 is an error condition. */ |
11387 | if (n == 0) | |
11388 | { | |
11389 | *new_return = error_mark_node; | |
11390 | return true; | |
11391 | } | |
11392 | ||
86951993 | 11393 | /* If not a lock-free size, change to the library generic format. */ |
6b28e197 | 11394 | if (!atomic_size_supported_p (n)) |
86951993 AM |
11395 | { |
11396 | /* The library generic format does not have the weak parameter, so | |
11397 | remove it from the param list. Since a parameter has been removed, | |
11398 | we can be sure that there is room for the SIZE_T parameter, meaning | |
11399 | there will not be a recursive rebuilding of the parameter list, so | |
11400 | there is no danger this will be done twice. */ | |
11401 | if (n > 0) | |
11402 | { | |
9771b263 DN |
11403 | (*params)[3] = (*params)[4]; |
11404 | (*params)[4] = (*params)[5]; | |
11405 | params->truncate (5); | |
86951993 AM |
11406 | } |
11407 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11408 | return true; | |
11409 | } | |
11410 | ||
11411 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11412 | bool fn(T* mem, T* desired, T* return, weak, success, failure) | |
11413 | into | |
11414 | bool fn ((In *)mem, (In *)expected, (In) *desired, weak, succ, fail) */ | |
11415 | ||
9771b263 DN |
11416 | p0 = (*params)[0]; |
11417 | p1 = (*params)[1]; | |
11418 | p2 = (*params)[2]; | |
86951993 AM |
11419 | |
11420 | /* Create pointer to appropriate size. */ | |
11421 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11422 | I_type_ptr = build_pointer_type (I_type); | |
11423 | ||
11424 | /* Convert object pointer to required type. */ | |
11425 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
9771b263 | 11426 | (*params)[0] = p0; |
86951993 AM |
11427 | |
11428 | /* Convert expected pointer to required type. */ | |
11429 | p1 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p1); | |
9771b263 | 11430 | (*params)[1] = p1; |
86951993 AM |
11431 | |
11432 | /* Convert desired value to required type, and dereference it. */ | |
11433 | p2 = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
11434 | p2 = build1 (VIEW_CONVERT_EXPR, I_type, p2); | |
9771b263 | 11435 | (*params)[2] = p2; |
86951993 AM |
11436 | |
11437 | /* The rest of the parameters are fine. NULL means no special return value | |
11438 | processing.*/ | |
11439 | *new_return = NULL; | |
11440 | return false; | |
11441 | } | |
11442 | ||
11443 | ||
11444 | /* This will process an __atomic_load function call, determine whether it | |
11445 | needs to be mapped to the _N variation, or turned into a library call. | |
11446 | LOC is the location of the builtin call. | |
11447 | FUNCTION is the DECL that has been invoked; | |
11448 | PARAMS is the argument list for the call. The return value is non-null | |
11449 | TRUE is returned if it is translated into the proper format for a call to the | |
11450 | external library, and NEW_RETURN is set the tree for that function. | |
11451 | FALSE is returned if processing for the _N variation is required, and | |
026c3cfd | 11452 | NEW_RETURN is set to the return value the result is copied into. */ |
86951993 AM |
11453 | |
11454 | static bool | |
11455 | resolve_overloaded_atomic_load (location_t loc, tree function, | |
9771b263 | 11456 | vec<tree, va_gc> *params, tree *new_return) |
86951993 AM |
11457 | { |
11458 | tree p0, p1, p2; | |
11459 | tree I_type, I_type_ptr; | |
11460 | int n = get_atomic_generic_size (loc, function, params); | |
11461 | ||
c466c4ff AM |
11462 | /* Size of 0 is an error condition. */ |
11463 | if (n == 0) | |
11464 | { | |
11465 | *new_return = error_mark_node; | |
11466 | return true; | |
11467 | } | |
11468 | ||
86951993 | 11469 | /* If not a lock-free size, change to the library generic format. */ |
6b28e197 | 11470 | if (!atomic_size_supported_p (n)) |
86951993 AM |
11471 | { |
11472 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11473 | return true; | |
11474 | } | |
11475 | ||
11476 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11477 | void fn(T* mem, T* return, model) | |
11478 | into | |
11479 | *return = (T) (fn ((In *) mem, model)) */ | |
11480 | ||
9771b263 DN |
11481 | p0 = (*params)[0]; |
11482 | p1 = (*params)[1]; | |
11483 | p2 = (*params)[2]; | |
86951993 AM |
11484 | |
11485 | /* Create pointer to appropriate size. */ | |
11486 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11487 | I_type_ptr = build_pointer_type (I_type); | |
11488 | ||
11489 | /* Convert object pointer to required type. */ | |
11490 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
9771b263 | 11491 | (*params)[0] = p0; |
86951993 AM |
11492 | |
11493 | /* Move memory model to the 2nd position, and end param list. */ | |
9771b263 DN |
11494 | (*params)[1] = p2; |
11495 | params->truncate (2); | |
86951993 AM |
11496 | |
11497 | /* Convert return pointer and dereference it for later assignment. */ | |
11498 | *new_return = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11499 | ||
11500 | return false; | |
11501 | } | |
11502 | ||
11503 | ||
11504 | /* This will process an __atomic_store function call, determine whether it | |
11505 | needs to be mapped to the _N variation, or turned into a library call. | |
11506 | LOC is the location of the builtin call. | |
11507 | FUNCTION is the DECL that has been invoked; | |
11508 | PARAMS is the argument list for the call. The return value is non-null | |
11509 | TRUE is returned if it is translated into the proper format for a call to the | |
11510 | external library, and NEW_RETURN is set the tree for that function. | |
11511 | FALSE is returned if processing for the _N variation is required, and | |
026c3cfd | 11512 | NEW_RETURN is set to the return value the result is copied into. */ |
86951993 AM |
11513 | |
11514 | static bool | |
11515 | resolve_overloaded_atomic_store (location_t loc, tree function, | |
9771b263 | 11516 | vec<tree, va_gc> *params, tree *new_return) |
86951993 AM |
11517 | { |
11518 | tree p0, p1; | |
11519 | tree I_type, I_type_ptr; | |
11520 | int n = get_atomic_generic_size (loc, function, params); | |
11521 | ||
c466c4ff AM |
11522 | /* Size of 0 is an error condition. */ |
11523 | if (n == 0) | |
11524 | { | |
11525 | *new_return = error_mark_node; | |
11526 | return true; | |
11527 | } | |
11528 | ||
86951993 | 11529 | /* If not a lock-free size, change to the library generic format. */ |
6b28e197 | 11530 | if (!atomic_size_supported_p (n)) |
86951993 AM |
11531 | { |
11532 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11533 | return true; | |
11534 | } | |
11535 | ||
11536 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11537 | void fn(T* mem, T* value, model) | |
11538 | into | |
11539 | fn ((In *) mem, (In) *value, model) */ | |
11540 | ||
9771b263 DN |
11541 | p0 = (*params)[0]; |
11542 | p1 = (*params)[1]; | |
86951993 AM |
11543 | |
11544 | /* Create pointer to appropriate size. */ | |
11545 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11546 | I_type_ptr = build_pointer_type (I_type); | |
11547 | ||
11548 | /* Convert object pointer to required type. */ | |
11549 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
9771b263 | 11550 | (*params)[0] = p0; |
86951993 AM |
11551 | |
11552 | /* Convert new value to required type, and dereference it. */ | |
11553 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11554 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
9771b263 | 11555 | (*params)[1] = p1; |
86951993 AM |
11556 | |
11557 | /* The memory model is in the right spot already. Return is void. */ | |
11558 | *new_return = NULL_TREE; | |
11559 | ||
11560 | return false; | |
11561 | } | |
11562 | ||
11563 | ||
48ae6c13 RH |
11564 | /* Some builtin functions are placeholders for other expressions. This |
11565 | function should be called immediately after parsing the call expression | |
11566 | before surrounding code has committed to the type of the expression. | |
11567 | ||
c2255bc4 AH |
11568 | LOC is the location of the builtin call. |
11569 | ||
48ae6c13 RH |
11570 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. |
11571 | PARAMS is the argument list for the call. The return value is non-null | |
11572 | when expansion is complete, and null if normal processing should | |
11573 | continue. */ | |
11574 | ||
11575 | tree | |
9771b263 DN |
11576 | resolve_overloaded_builtin (location_t loc, tree function, |
11577 | vec<tree, va_gc> *params) | |
48ae6c13 RH |
11578 | { |
11579 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
86951993 AM |
11580 | bool orig_format = true; |
11581 | tree new_return = NULL_TREE; | |
11582 | ||
58646b77 PB |
11583 | switch (DECL_BUILT_IN_CLASS (function)) |
11584 | { | |
11585 | case BUILT_IN_NORMAL: | |
11586 | break; | |
11587 | case BUILT_IN_MD: | |
11588 | if (targetm.resolve_overloaded_builtin) | |
c2255bc4 | 11589 | return targetm.resolve_overloaded_builtin (loc, function, params); |
58646b77 | 11590 | else |
c22cacf3 | 11591 | return NULL_TREE; |
58646b77 PB |
11592 | default: |
11593 | return NULL_TREE; | |
11594 | } | |
c22cacf3 | 11595 | |
58646b77 | 11596 | /* Handle BUILT_IN_NORMAL here. */ |
48ae6c13 RH |
11597 | switch (orig_code) |
11598 | { | |
86951993 AM |
11599 | case BUILT_IN_ATOMIC_EXCHANGE: |
11600 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
11601 | case BUILT_IN_ATOMIC_LOAD: | |
11602 | case BUILT_IN_ATOMIC_STORE: | |
11603 | { | |
11604 | /* Handle these 4 together so that they can fall through to the next | |
11605 | case if the call is transformed to an _N variant. */ | |
11606 | switch (orig_code) | |
11607 | { | |
11608 | case BUILT_IN_ATOMIC_EXCHANGE: | |
11609 | { | |
11610 | if (resolve_overloaded_atomic_exchange (loc, function, params, | |
11611 | &new_return)) | |
11612 | return new_return; | |
11613 | /* Change to the _N variant. */ | |
11614 | orig_code = BUILT_IN_ATOMIC_EXCHANGE_N; | |
11615 | break; | |
11616 | } | |
11617 | ||
11618 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
11619 | { | |
11620 | if (resolve_overloaded_atomic_compare_exchange (loc, function, | |
11621 | params, | |
11622 | &new_return)) | |
11623 | return new_return; | |
11624 | /* Change to the _N variant. */ | |
11625 | orig_code = BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N; | |
11626 | break; | |
11627 | } | |
11628 | case BUILT_IN_ATOMIC_LOAD: | |
11629 | { | |
11630 | if (resolve_overloaded_atomic_load (loc, function, params, | |
11631 | &new_return)) | |
11632 | return new_return; | |
11633 | /* Change to the _N variant. */ | |
11634 | orig_code = BUILT_IN_ATOMIC_LOAD_N; | |
11635 | break; | |
11636 | } | |
11637 | case BUILT_IN_ATOMIC_STORE: | |
11638 | { | |
11639 | if (resolve_overloaded_atomic_store (loc, function, params, | |
11640 | &new_return)) | |
11641 | return new_return; | |
11642 | /* Change to the _N variant. */ | |
11643 | orig_code = BUILT_IN_ATOMIC_STORE_N; | |
11644 | break; | |
11645 | } | |
11646 | default: | |
11647 | gcc_unreachable (); | |
11648 | } | |
11649 | /* Fallthrough to the normal processing. */ | |
11650 | } | |
11651 | case BUILT_IN_ATOMIC_EXCHANGE_N: | |
11652 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N: | |
11653 | case BUILT_IN_ATOMIC_LOAD_N: | |
11654 | case BUILT_IN_ATOMIC_STORE_N: | |
11655 | case BUILT_IN_ATOMIC_ADD_FETCH_N: | |
11656 | case BUILT_IN_ATOMIC_SUB_FETCH_N: | |
11657 | case BUILT_IN_ATOMIC_AND_FETCH_N: | |
11658 | case BUILT_IN_ATOMIC_NAND_FETCH_N: | |
11659 | case BUILT_IN_ATOMIC_XOR_FETCH_N: | |
11660 | case BUILT_IN_ATOMIC_OR_FETCH_N: | |
11661 | case BUILT_IN_ATOMIC_FETCH_ADD_N: | |
11662 | case BUILT_IN_ATOMIC_FETCH_SUB_N: | |
11663 | case BUILT_IN_ATOMIC_FETCH_AND_N: | |
11664 | case BUILT_IN_ATOMIC_FETCH_NAND_N: | |
11665 | case BUILT_IN_ATOMIC_FETCH_XOR_N: | |
11666 | case BUILT_IN_ATOMIC_FETCH_OR_N: | |
11667 | { | |
11668 | orig_format = false; | |
11669 | /* Fallthru for parameter processing. */ | |
11670 | } | |
e0a8ecf2 AM |
11671 | case BUILT_IN_SYNC_FETCH_AND_ADD_N: |
11672 | case BUILT_IN_SYNC_FETCH_AND_SUB_N: | |
11673 | case BUILT_IN_SYNC_FETCH_AND_OR_N: | |
11674 | case BUILT_IN_SYNC_FETCH_AND_AND_N: | |
11675 | case BUILT_IN_SYNC_FETCH_AND_XOR_N: | |
11676 | case BUILT_IN_SYNC_FETCH_AND_NAND_N: | |
11677 | case BUILT_IN_SYNC_ADD_AND_FETCH_N: | |
11678 | case BUILT_IN_SYNC_SUB_AND_FETCH_N: | |
11679 | case BUILT_IN_SYNC_OR_AND_FETCH_N: | |
11680 | case BUILT_IN_SYNC_AND_AND_FETCH_N: | |
11681 | case BUILT_IN_SYNC_XOR_AND_FETCH_N: | |
11682 | case BUILT_IN_SYNC_NAND_AND_FETCH_N: | |
11683 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N: | |
11684 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N: | |
11685 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_N: | |
11686 | case BUILT_IN_SYNC_LOCK_RELEASE_N: | |
48ae6c13 RH |
11687 | { |
11688 | int n = sync_resolve_size (function, params); | |
bbbbb16a | 11689 | tree new_function, first_param, result; |
e79983f4 | 11690 | enum built_in_function fncode; |
48ae6c13 RH |
11691 | |
11692 | if (n == 0) | |
11693 | return error_mark_node; | |
11694 | ||
e79983f4 MM |
11695 | fncode = (enum built_in_function)((int)orig_code + exact_log2 (n) + 1); |
11696 | new_function = builtin_decl_explicit (fncode); | |
86951993 AM |
11697 | if (!sync_resolve_params (loc, function, new_function, params, |
11698 | orig_format)) | |
48ae6c13 RH |
11699 | return error_mark_node; |
11700 | ||
9771b263 | 11701 | first_param = (*params)[0]; |
81e5eca8 MP |
11702 | result = build_function_call_vec (loc, vNULL, new_function, params, |
11703 | NULL); | |
86951993 AM |
11704 | if (result == error_mark_node) |
11705 | return result; | |
e0a8ecf2 | 11706 | if (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N |
86951993 AM |
11707 | && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N |
11708 | && orig_code != BUILT_IN_ATOMIC_STORE_N) | |
11709 | result = sync_resolve_return (first_param, result, orig_format); | |
48ae6c13 | 11710 | |
86951993 AM |
11711 | /* If new_return is set, assign function to that expr and cast the |
11712 | result to void since the generic interface returned void. */ | |
11713 | if (new_return) | |
11714 | { | |
11715 | /* Cast function result from I{1,2,4,8,16} to the required type. */ | |
11716 | result = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (new_return), result); | |
11717 | result = build2 (MODIFY_EXPR, TREE_TYPE (new_return), new_return, | |
11718 | result); | |
11719 | TREE_SIDE_EFFECTS (result) = 1; | |
11720 | protected_set_expr_location (result, loc); | |
11721 | result = convert (void_type_node, result); | |
11722 | } | |
48ae6c13 RH |
11723 | return result; |
11724 | } | |
11725 | ||
11726 | default: | |
58646b77 | 11727 | return NULL_TREE; |
48ae6c13 RH |
11728 | } |
11729 | } | |
11730 | ||
0af94e6f JR |
11731 | /* vector_types_compatible_elements_p is used in type checks of vectors |
11732 | values used as operands of binary operators. Where it returns true, and | |
11733 | the other checks of the caller succeed (being vector types in he first | |
11734 | place, and matching number of elements), we can just treat the types | |
11735 | as essentially the same. | |
11736 | Contrast with vector_targets_convertible_p, which is used for vector | |
11737 | pointer types, and vector_types_convertible_p, which will allow | |
11738 | language-specific matches under the control of flag_lax_vector_conversions, | |
11739 | and might still require a conversion. */ | |
11740 | /* True if vector types T1 and T2 can be inputs to the same binary | |
11741 | operator without conversion. | |
11742 | We don't check the overall vector size here because some of our callers | |
11743 | want to give different error messages when the vectors are compatible | |
11744 | except for the element count. */ | |
11745 | ||
5bed876a | 11746 | bool |
0af94e6f | 11747 | vector_types_compatible_elements_p (tree t1, tree t2) |
5bed876a | 11748 | { |
0af94e6f JR |
11749 | bool opaque = TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2); |
11750 | t1 = TREE_TYPE (t1); | |
11751 | t2 = TREE_TYPE (t2); | |
11752 | ||
5bed876a AH |
11753 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); |
11754 | ||
ab22c1fa CF |
11755 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
11756 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
11757 | || c2 == FIXED_POINT_TYPE)); | |
5bed876a | 11758 | |
0af94e6f JR |
11759 | t1 = c_common_signed_type (t1); |
11760 | t2 = c_common_signed_type (t2); | |
5bed876a AH |
11761 | /* Equality works here because c_common_signed_type uses |
11762 | TYPE_MAIN_VARIANT. */ | |
0af94e6f JR |
11763 | if (t1 == t2) |
11764 | return true; | |
11765 | if (opaque && c1 == c2 | |
11766 | && (c1 == INTEGER_TYPE || c1 == REAL_TYPE) | |
11767 | && TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
11768 | return true; | |
11769 | return false; | |
5bed876a AH |
11770 | } |
11771 | ||
104f8784 KG |
11772 | /* Check for missing format attributes on function pointers. LTYPE is |
11773 | the new type or left-hand side type. RTYPE is the old type or | |
11774 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
11775 | attribute. */ | |
11776 | ||
11777 | bool | |
11778 | check_missing_format_attribute (tree ltype, tree rtype) | |
11779 | { | |
11780 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
11781 | tree ra; | |
11782 | ||
11783 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
11784 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
11785 | break; | |
11786 | if (ra) | |
11787 | { | |
11788 | tree la; | |
11789 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
11790 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
11791 | break; | |
11792 | return !la; | |
11793 | } | |
11794 | else | |
11795 | return false; | |
11796 | } | |
11797 | ||
ff6b6641 GDR |
11798 | /* Subscripting with type char is likely to lose on a machine where |
11799 | chars are signed. So warn on any machine, but optionally. Don't | |
11800 | warn for unsigned char since that type is safe. Don't warn for | |
11801 | signed char because anyone who uses that must have done so | |
11802 | deliberately. Furthermore, we reduce the false positive load by | |
11803 | warning only for non-constant value of type char. */ | |
11804 | ||
11805 | void | |
5bd012f8 | 11806 | warn_array_subscript_with_type_char (location_t loc, tree index) |
ff6b6641 GDR |
11807 | { |
11808 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
11809 | && TREE_CODE (index) != INTEGER_CST) | |
5bd012f8 MP |
11810 | warning_at (loc, OPT_Wchar_subscripts, |
11811 | "array subscript has type %<char%>"); | |
ff6b6641 GDR |
11812 | } |
11813 | ||
2a67bec2 ILT |
11814 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
11815 | cover cases like x + y << z which readers are likely to | |
11816 | misinterpret. We have seen an expression in which CODE is a binary | |
100d537d MLI |
11817 | operator used to combine expressions ARG_LEFT and ARG_RIGHT, which |
11818 | before folding had CODE_LEFT and CODE_RIGHT. CODE_LEFT and | |
11819 | CODE_RIGHT may be ERROR_MARK, which means that that side of the | |
11820 | expression was not formed using a binary or unary operator, or it | |
11821 | was enclosed in parentheses. */ | |
2a67bec2 ILT |
11822 | |
11823 | void | |
5d9de0d0 | 11824 | warn_about_parentheses (location_t loc, enum tree_code code, |
fb3e178a | 11825 | enum tree_code code_left, tree arg_left, |
100d537d | 11826 | enum tree_code code_right, tree arg_right) |
2a67bec2 ILT |
11827 | { |
11828 | if (!warn_parentheses) | |
11829 | return; | |
11830 | ||
100d537d MLI |
11831 | /* This macro tests that the expression ARG with original tree code |
11832 | CODE appears to be a boolean expression. or the result of folding a | |
11833 | boolean expression. */ | |
11834 | #define APPEARS_TO_BE_BOOLEAN_EXPR_P(CODE, ARG) \ | |
11835 | (truth_value_p (TREE_CODE (ARG)) \ | |
11836 | || TREE_CODE (TREE_TYPE (ARG)) == BOOLEAN_TYPE \ | |
11837 | /* Folding may create 0 or 1 integers from other expressions. */ \ | |
11838 | || ((CODE) != INTEGER_CST \ | |
11839 | && (integer_onep (ARG) || integer_zerop (ARG)))) | |
11840 | ||
b8698a0f | 11841 | switch (code) |
2a67bec2 | 11842 | { |
100d537d | 11843 | case LSHIFT_EXPR: |
5d9de0d0 PC |
11844 | if (code_left == PLUS_EXPR) |
11845 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11846 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11847 | else if (code_right == PLUS_EXPR) | |
11848 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11849 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11850 | else if (code_left == MINUS_EXPR) | |
11851 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11852 | "suggest parentheses around %<-%> inside %<<<%>"); | |
11853 | else if (code_right == MINUS_EXPR) | |
11854 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11855 | "suggest parentheses around %<-%> inside %<<<%>"); | |
100d537d | 11856 | return; |
2a67bec2 | 11857 | |
100d537d | 11858 | case RSHIFT_EXPR: |
5d9de0d0 PC |
11859 | if (code_left == PLUS_EXPR) |
11860 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11861 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11862 | else if (code_right == PLUS_EXPR) | |
11863 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11864 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11865 | else if (code_left == MINUS_EXPR) | |
11866 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11867 | "suggest parentheses around %<-%> inside %<>>%>"); | |
11868 | else if (code_right == MINUS_EXPR) | |
11869 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11870 | "suggest parentheses around %<-%> inside %<>>%>"); | |
100d537d | 11871 | return; |
2a67bec2 | 11872 | |
100d537d | 11873 | case TRUTH_ORIF_EXPR: |
5d9de0d0 PC |
11874 | if (code_left == TRUTH_ANDIF_EXPR) |
11875 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11876 | "suggest parentheses around %<&&%> within %<||%>"); | |
11877 | else if (code_right == TRUTH_ANDIF_EXPR) | |
11878 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11879 | "suggest parentheses around %<&&%> within %<||%>"); | |
100d537d MLI |
11880 | return; |
11881 | ||
11882 | case BIT_IOR_EXPR: | |
2a67bec2 | 11883 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR |
5d9de0d0 PC |
11884 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11885 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11886 | "suggest parentheses around arithmetic in operand of %<|%>"); | |
11887 | else if (code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
11888 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11889 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d | 11890 | "suggest parentheses around arithmetic in operand of %<|%>"); |
2a67bec2 | 11891 | /* Check cases like x|y==z */ |
5d9de0d0 PC |
11892 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11893 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11894 | "suggest parentheses around comparison in operand of %<|%>"); | |
11895 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11896 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d MLI |
11897 | "suggest parentheses around comparison in operand of %<|%>"); |
11898 | /* Check cases like !x | y */ | |
11899 | else if (code_left == TRUTH_NOT_EXPR | |
11900 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
5d9de0d0 PC |
11901 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11902 | "suggest parentheses around operand of " | |
11903 | "%<!%> or change %<|%> to %<||%> or %<!%> to %<~%>"); | |
100d537d | 11904 | return; |
2a67bec2 | 11905 | |
100d537d | 11906 | case BIT_XOR_EXPR: |
2a67bec2 | 11907 | if (code_left == BIT_AND_EXPR |
5d9de0d0 PC |
11908 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11909 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11910 | "suggest parentheses around arithmetic in operand of %<^%>"); | |
11911 | else if (code_right == BIT_AND_EXPR | |
11912 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11913 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d | 11914 | "suggest parentheses around arithmetic in operand of %<^%>"); |
2a67bec2 | 11915 | /* Check cases like x^y==z */ |
5d9de0d0 PC |
11916 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11917 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11918 | "suggest parentheses around comparison in operand of %<^%>"); | |
11919 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11920 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d MLI |
11921 | "suggest parentheses around comparison in operand of %<^%>"); |
11922 | return; | |
2a67bec2 | 11923 | |
100d537d | 11924 | case BIT_AND_EXPR: |
5d9de0d0 PC |
11925 | if (code_left == PLUS_EXPR) |
11926 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11927 | "suggest parentheses around %<+%> in operand of %<&%>"); | |
11928 | else if (code_right == PLUS_EXPR) | |
11929 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d | 11930 | "suggest parentheses around %<+%> in operand of %<&%>"); |
5d9de0d0 PC |
11931 | else if (code_left == MINUS_EXPR) |
11932 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11933 | "suggest parentheses around %<-%> in operand of %<&%>"); | |
11934 | else if (code_right == MINUS_EXPR) | |
11935 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d | 11936 | "suggest parentheses around %<-%> in operand of %<&%>"); |
2a67bec2 | 11937 | /* Check cases like x&y==z */ |
5d9de0d0 PC |
11938 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11939 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11940 | "suggest parentheses around comparison in operand of %<&%>"); | |
11941 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11942 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d MLI |
11943 | "suggest parentheses around comparison in operand of %<&%>"); |
11944 | /* Check cases like !x & y */ | |
11945 | else if (code_left == TRUTH_NOT_EXPR | |
11946 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
5d9de0d0 PC |
11947 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11948 | "suggest parentheses around operand of " | |
11949 | "%<!%> or change %<&%> to %<&&%> or %<!%> to %<~%>"); | |
100d537d | 11950 | return; |
2a67bec2 | 11951 | |
100d537d | 11952 | case EQ_EXPR: |
5d9de0d0 PC |
11953 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11954 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11955 | "suggest parentheses around comparison in operand of %<==%>"); | |
11956 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11957 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d MLI |
11958 | "suggest parentheses around comparison in operand of %<==%>"); |
11959 | return; | |
11960 | case NE_EXPR: | |
5d9de0d0 PC |
11961 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11962 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11963 | "suggest parentheses around comparison in operand of %<!=%>"); | |
11964 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11965 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
100d537d MLI |
11966 | "suggest parentheses around comparison in operand of %<!=%>"); |
11967 | return; | |
11968 | ||
11969 | default: | |
5d9de0d0 PC |
11970 | if (TREE_CODE_CLASS (code) == tcc_comparison) |
11971 | { | |
11972 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
fb3e178a JJ |
11973 | && code_left != NE_EXPR && code_left != EQ_EXPR |
11974 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_left))) | |
5d9de0d0 PC |
11975 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11976 | "comparisons like %<X<=Y<=Z%> do not " | |
11977 | "have their mathematical meaning"); | |
11978 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison | |
fb3e178a | 11979 | && code_right != NE_EXPR && code_right != EQ_EXPR |
5d9de0d0 PC |
11980 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_right))) |
11981 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11982 | "comparisons like %<X<=Y<=Z%> do not " | |
11983 | "have their mathematical meaning"); | |
11984 | } | |
100d537d | 11985 | return; |
e7917d06 | 11986 | } |
100d537d | 11987 | #undef NOT_A_BOOLEAN_EXPR_P |
2a67bec2 ILT |
11988 | } |
11989 | ||
c616e51b MLI |
11990 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
11991 | ||
11992 | void | |
11993 | warn_for_unused_label (tree label) | |
11994 | { | |
11995 | if (!TREE_USED (label)) | |
11996 | { | |
11997 | if (DECL_INITIAL (label)) | |
11998 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
11999 | else | |
12000 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
12001 | } | |
12002 | } | |
ff6b6641 | 12003 | |
c9f9eb5d AH |
12004 | /* Warn for division by zero according to the value of DIVISOR. LOC |
12005 | is the location of the division operator. */ | |
2e9cb75e MLI |
12006 | |
12007 | void | |
c9f9eb5d | 12008 | warn_for_div_by_zero (location_t loc, tree divisor) |
2e9cb75e | 12009 | { |
ab22c1fa CF |
12010 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
12011 | about division by zero. Do not issue a warning if DIVISOR has a | |
2e9cb75e MLI |
12012 | floating-point type, since we consider 0.0/0.0 a valid way of |
12013 | generating a NaN. */ | |
7d882b83 | 12014 | if (c_inhibit_evaluation_warnings == 0 |
ab22c1fa | 12015 | && (integer_zerop (divisor) || fixed_zerop (divisor))) |
c9f9eb5d | 12016 | warning_at (loc, OPT_Wdiv_by_zero, "division by zero"); |
2e9cb75e MLI |
12017 | } |
12018 | ||
2d12797c MLI |
12019 | /* Subroutine of build_binary_op. Give warnings for comparisons |
12020 | between signed and unsigned quantities that may fail. Do the | |
12021 | checking based on the original operand trees ORIG_OP0 and ORIG_OP1, | |
12022 | so that casts will be considered, but default promotions won't | |
ba47d38d AH |
12023 | be. |
12024 | ||
12025 | LOCATION is the location of the comparison operator. | |
2d12797c MLI |
12026 | |
12027 | The arguments of this function map directly to local variables | |
12028 | of build_binary_op. */ | |
12029 | ||
b8698a0f | 12030 | void |
ba47d38d | 12031 | warn_for_sign_compare (location_t location, |
b8698a0f L |
12032 | tree orig_op0, tree orig_op1, |
12033 | tree op0, tree op1, | |
2d12797c MLI |
12034 | tree result_type, enum tree_code resultcode) |
12035 | { | |
12036 | int op0_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op0)); | |
12037 | int op1_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op1)); | |
12038 | int unsignedp0, unsignedp1; | |
b8698a0f | 12039 | |
2d12797c MLI |
12040 | /* In C++, check for comparison of different enum types. */ |
12041 | if (c_dialect_cxx() | |
12042 | && TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE | |
12043 | && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE | |
12044 | && TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0)) | |
ead51d36 | 12045 | != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1))) |
2d12797c | 12046 | { |
ba47d38d AH |
12047 | warning_at (location, |
12048 | OPT_Wsign_compare, "comparison between types %qT and %qT", | |
12049 | TREE_TYPE (orig_op0), TREE_TYPE (orig_op1)); | |
2d12797c MLI |
12050 | } |
12051 | ||
12052 | /* Do not warn if the comparison is being done in a signed type, | |
12053 | since the signed type will only be chosen if it can represent | |
12054 | all the values of the unsigned type. */ | |
12055 | if (!TYPE_UNSIGNED (result_type)) | |
12056 | /* OK */; | |
12057 | /* Do not warn if both operands are unsigned. */ | |
12058 | else if (op0_signed == op1_signed) | |
12059 | /* OK */; | |
12060 | else | |
12061 | { | |
ead51d36 | 12062 | tree sop, uop, base_type; |
2d12797c | 12063 | bool ovf; |
ead51d36 | 12064 | |
2d12797c MLI |
12065 | if (op0_signed) |
12066 | sop = orig_op0, uop = orig_op1; | |
b8698a0f | 12067 | else |
2d12797c MLI |
12068 | sop = orig_op1, uop = orig_op0; |
12069 | ||
b8698a0f | 12070 | STRIP_TYPE_NOPS (sop); |
2d12797c | 12071 | STRIP_TYPE_NOPS (uop); |
ead51d36 JJ |
12072 | base_type = (TREE_CODE (result_type) == COMPLEX_TYPE |
12073 | ? TREE_TYPE (result_type) : result_type); | |
2d12797c MLI |
12074 | |
12075 | /* Do not warn if the signed quantity is an unsuffixed integer | |
12076 | literal (or some static constant expression involving such | |
12077 | literals or a conditional expression involving such literals) | |
12078 | and it is non-negative. */ | |
12079 | if (tree_expr_nonnegative_warnv_p (sop, &ovf)) | |
12080 | /* OK */; | |
12081 | /* Do not warn if the comparison is an equality operation, the | |
12082 | unsigned quantity is an integral constant, and it would fit | |
12083 | in the result if the result were signed. */ | |
12084 | else if (TREE_CODE (uop) == INTEGER_CST | |
12085 | && (resultcode == EQ_EXPR || resultcode == NE_EXPR) | |
ead51d36 | 12086 | && int_fits_type_p (uop, c_common_signed_type (base_type))) |
2d12797c MLI |
12087 | /* OK */; |
12088 | /* In C, do not warn if the unsigned quantity is an enumeration | |
12089 | constant and its maximum value would fit in the result if the | |
12090 | result were signed. */ | |
12091 | else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST | |
12092 | && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE | |
12093 | && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)), | |
ead51d36 | 12094 | c_common_signed_type (base_type))) |
2d12797c | 12095 | /* OK */; |
b8698a0f | 12096 | else |
ba47d38d | 12097 | warning_at (location, |
b8698a0f | 12098 | OPT_Wsign_compare, |
ba47d38d | 12099 | "comparison between signed and unsigned integer expressions"); |
2d12797c | 12100 | } |
b8698a0f | 12101 | |
2d12797c MLI |
12102 | /* Warn if two unsigned values are being compared in a size larger |
12103 | than their original size, and one (and only one) is the result of | |
12104 | a `~' operator. This comparison will always fail. | |
b8698a0f | 12105 | |
2d12797c MLI |
12106 | Also warn if one operand is a constant, and the constant does not |
12107 | have all bits set that are set in the ~ operand when it is | |
12108 | extended. */ | |
12109 | ||
828fb3ba JM |
12110 | op0 = c_common_get_narrower (op0, &unsignedp0); |
12111 | op1 = c_common_get_narrower (op1, &unsignedp1); | |
b8698a0f | 12112 | |
2d12797c MLI |
12113 | if ((TREE_CODE (op0) == BIT_NOT_EXPR) |
12114 | ^ (TREE_CODE (op1) == BIT_NOT_EXPR)) | |
12115 | { | |
12116 | if (TREE_CODE (op0) == BIT_NOT_EXPR) | |
828fb3ba | 12117 | op0 = c_common_get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); |
2d12797c | 12118 | if (TREE_CODE (op1) == BIT_NOT_EXPR) |
828fb3ba | 12119 | op1 = c_common_get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); |
2d12797c | 12120 | |
9541ffee | 12121 | if (tree_fits_shwi_p (op0) || tree_fits_shwi_p (op1)) |
2d12797c MLI |
12122 | { |
12123 | tree primop; | |
12124 | HOST_WIDE_INT constant, mask; | |
12125 | int unsignedp; | |
12126 | unsigned int bits; | |
b8698a0f | 12127 | |
9541ffee | 12128 | if (tree_fits_shwi_p (op0)) |
2d12797c MLI |
12129 | { |
12130 | primop = op1; | |
12131 | unsignedp = unsignedp1; | |
9439e9a1 | 12132 | constant = tree_to_shwi (op0); |
2d12797c MLI |
12133 | } |
12134 | else | |
12135 | { | |
12136 | primop = op0; | |
12137 | unsignedp = unsignedp0; | |
9439e9a1 | 12138 | constant = tree_to_shwi (op1); |
2d12797c | 12139 | } |
b8698a0f | 12140 | |
2d12797c MLI |
12141 | bits = TYPE_PRECISION (TREE_TYPE (primop)); |
12142 | if (bits < TYPE_PRECISION (result_type) | |
12143 | && bits < HOST_BITS_PER_LONG && unsignedp) | |
12144 | { | |
aa256c4a | 12145 | mask = (~ (unsigned HOST_WIDE_INT) 0) << bits; |
2d12797c MLI |
12146 | if ((mask & constant) != mask) |
12147 | { | |
12148 | if (constant == 0) | |
0a756a3f MP |
12149 | warning_at (location, OPT_Wsign_compare, |
12150 | "promoted ~unsigned is always non-zero"); | |
2d12797c | 12151 | else |
b8698a0f | 12152 | warning_at (location, OPT_Wsign_compare, |
ba47d38d | 12153 | "comparison of promoted ~unsigned with constant"); |
2d12797c MLI |
12154 | } |
12155 | } | |
12156 | } | |
12157 | else if (unsignedp0 && unsignedp1 | |
12158 | && (TYPE_PRECISION (TREE_TYPE (op0)) | |
12159 | < TYPE_PRECISION (result_type)) | |
12160 | && (TYPE_PRECISION (TREE_TYPE (op1)) | |
12161 | < TYPE_PRECISION (result_type))) | |
ba47d38d | 12162 | warning_at (location, OPT_Wsign_compare, |
2d12797c MLI |
12163 | "comparison of promoted ~unsigned with unsigned"); |
12164 | } | |
12165 | } | |
12166 | ||
c5ee1358 MM |
12167 | /* RESULT_TYPE is the result of converting TYPE1 and TYPE2 to a common |
12168 | type via c_common_type. If -Wdouble-promotion is in use, and the | |
12169 | conditions for warning have been met, issue a warning. GMSGID is | |
12170 | the warning message. It must have two %T specifiers for the type | |
12171 | that was converted (generally "float") and the type to which it was | |
12172 | converted (generally "double), respectively. LOC is the location | |
12173 | to which the awrning should refer. */ | |
12174 | ||
12175 | void | |
12176 | do_warn_double_promotion (tree result_type, tree type1, tree type2, | |
12177 | const char *gmsgid, location_t loc) | |
12178 | { | |
12179 | tree source_type; | |
12180 | ||
12181 | if (!warn_double_promotion) | |
12182 | return; | |
12183 | /* If the conversion will not occur at run-time, there is no need to | |
12184 | warn about it. */ | |
12185 | if (c_inhibit_evaluation_warnings) | |
12186 | return; | |
12187 | if (TYPE_MAIN_VARIANT (result_type) != double_type_node | |
12188 | && TYPE_MAIN_VARIANT (result_type) != complex_double_type_node) | |
12189 | return; | |
12190 | if (TYPE_MAIN_VARIANT (type1) == float_type_node | |
12191 | || TYPE_MAIN_VARIANT (type1) == complex_float_type_node) | |
12192 | source_type = type1; | |
12193 | else if (TYPE_MAIN_VARIANT (type2) == float_type_node | |
12194 | || TYPE_MAIN_VARIANT (type2) == complex_float_type_node) | |
12195 | source_type = type2; | |
12196 | else | |
12197 | return; | |
12198 | warning_at (loc, OPT_Wdouble_promotion, gmsgid, source_type, result_type); | |
12199 | } | |
12200 | ||
da2e71c9 MLI |
12201 | /* Possibly warn about unused parameters. */ |
12202 | ||
12203 | void | |
12204 | do_warn_unused_parameter (tree fn) | |
12205 | { | |
12206 | tree decl; | |
12207 | ||
12208 | for (decl = DECL_ARGUMENTS (fn); | |
12209 | decl; decl = DECL_CHAIN (decl)) | |
12210 | if (!TREE_USED (decl) && TREE_CODE (decl) == PARM_DECL | |
12211 | && DECL_NAME (decl) && !DECL_ARTIFICIAL (decl) | |
12212 | && !TREE_NO_WARNING (decl)) | |
12213 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wunused_parameter, | |
12214 | "unused parameter %qD", decl); | |
12215 | } | |
12216 | ||
12217 | ||
d0940d56 DS |
12218 | /* Setup a TYPE_DECL node as a typedef representation. |
12219 | ||
12220 | X is a TYPE_DECL for a typedef statement. Create a brand new | |
12221 | ..._TYPE node (which will be just a variant of the existing | |
12222 | ..._TYPE node with identical properties) and then install X | |
12223 | as the TYPE_NAME of this brand new (duplicate) ..._TYPE node. | |
12224 | ||
12225 | The whole point here is to end up with a situation where each | |
12226 | and every ..._TYPE node the compiler creates will be uniquely | |
12227 | associated with AT MOST one node representing a typedef name. | |
12228 | This way, even though the compiler substitutes corresponding | |
12229 | ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very | |
12230 | early on, later parts of the compiler can always do the reverse | |
12231 | translation and get back the corresponding typedef name. For | |
12232 | example, given: | |
12233 | ||
12234 | typedef struct S MY_TYPE; | |
12235 | MY_TYPE object; | |
12236 | ||
12237 | Later parts of the compiler might only know that `object' was of | |
12238 | type `struct S' if it were not for code just below. With this | |
12239 | code however, later parts of the compiler see something like: | |
12240 | ||
12241 | struct S' == struct S | |
12242 | typedef struct S' MY_TYPE; | |
12243 | struct S' object; | |
12244 | ||
12245 | And they can then deduce (from the node for type struct S') that | |
12246 | the original object declaration was: | |
12247 | ||
12248 | MY_TYPE object; | |
12249 | ||
12250 | Being able to do this is important for proper support of protoize, | |
12251 | and also for generating precise symbolic debugging information | |
12252 | which takes full account of the programmer's (typedef) vocabulary. | |
12253 | ||
12254 | Obviously, we don't want to generate a duplicate ..._TYPE node if | |
12255 | the TYPE_DECL node that we are now processing really represents a | |
12256 | standard built-in type. */ | |
12257 | ||
12258 | void | |
12259 | set_underlying_type (tree x) | |
12260 | { | |
12261 | if (x == error_mark_node) | |
12262 | return; | |
12263 | if (DECL_IS_BUILTIN (x)) | |
12264 | { | |
12265 | if (TYPE_NAME (TREE_TYPE (x)) == 0) | |
12266 | TYPE_NAME (TREE_TYPE (x)) = x; | |
12267 | } | |
12268 | else if (TREE_TYPE (x) != error_mark_node | |
12269 | && DECL_ORIGINAL_TYPE (x) == NULL_TREE) | |
12270 | { | |
12271 | tree tt = TREE_TYPE (x); | |
12272 | DECL_ORIGINAL_TYPE (x) = tt; | |
12273 | tt = build_variant_type_copy (tt); | |
12274 | TYPE_STUB_DECL (tt) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x)); | |
12275 | TYPE_NAME (tt) = x; | |
12276 | TREE_USED (tt) = TREE_USED (x); | |
12277 | TREE_TYPE (x) = tt; | |
12278 | } | |
12279 | } | |
12280 | ||
b646ba3f DS |
12281 | /* Record the types used by the current global variable declaration |
12282 | being parsed, so that we can decide later to emit their debug info. | |
12283 | Those types are in types_used_by_cur_var_decl, and we are going to | |
12284 | store them in the types_used_by_vars_hash hash table. | |
12285 | DECL is the declaration of the global variable that has been parsed. */ | |
12286 | ||
12287 | void | |
12288 | record_types_used_by_current_var_decl (tree decl) | |
12289 | { | |
12290 | gcc_assert (decl && DECL_P (decl) && TREE_STATIC (decl)); | |
12291 | ||
9771b263 | 12292 | while (types_used_by_cur_var_decl && !types_used_by_cur_var_decl->is_empty ()) |
b646ba3f | 12293 | { |
9771b263 | 12294 | tree type = types_used_by_cur_var_decl->pop (); |
bc87224e | 12295 | types_used_by_var_decl_insert (type, decl); |
b646ba3f DS |
12296 | } |
12297 | } | |
12298 | ||
3797cb21 DS |
12299 | /* If DECL is a typedef that is declared in the current function, |
12300 | record it for the purpose of -Wunused-local-typedefs. */ | |
12301 | ||
12302 | void | |
12303 | record_locally_defined_typedef (tree decl) | |
12304 | { | |
12305 | struct c_language_function *l; | |
12306 | ||
12307 | if (!warn_unused_local_typedefs | |
12308 | || cfun == NULL | |
12309 | /* if this is not a locally defined typedef then we are not | |
12310 | interested. */ | |
12311 | || !is_typedef_decl (decl) | |
12312 | || !decl_function_context (decl)) | |
12313 | return; | |
12314 | ||
12315 | l = (struct c_language_function *) cfun->language; | |
9771b263 | 12316 | vec_safe_push (l->local_typedefs, decl); |
3797cb21 DS |
12317 | } |
12318 | ||
12319 | /* If T is a TYPE_DECL declared locally, mark it as used. */ | |
12320 | ||
12321 | void | |
12322 | maybe_record_typedef_use (tree t) | |
12323 | { | |
12324 | if (!is_typedef_decl (t)) | |
12325 | return; | |
12326 | ||
12327 | TREE_USED (t) = true; | |
12328 | } | |
12329 | ||
12330 | /* Warn if there are some unused locally defined typedefs in the | |
12331 | current function. */ | |
12332 | ||
12333 | void | |
12334 | maybe_warn_unused_local_typedefs (void) | |
12335 | { | |
12336 | int i; | |
12337 | tree decl; | |
12338 | /* The number of times we have emitted -Wunused-local-typedefs | |
12339 | warnings. If this is different from errorcount, that means some | |
12340 | unrelated errors have been issued. In which case, we'll avoid | |
12341 | emitting "unused-local-typedefs" warnings. */ | |
12342 | static int unused_local_typedefs_warn_count; | |
12343 | struct c_language_function *l; | |
12344 | ||
12345 | if (cfun == NULL) | |
12346 | return; | |
12347 | ||
12348 | if ((l = (struct c_language_function *) cfun->language) == NULL) | |
12349 | return; | |
12350 | ||
12351 | if (warn_unused_local_typedefs | |
12352 | && errorcount == unused_local_typedefs_warn_count) | |
12353 | { | |
9771b263 | 12354 | FOR_EACH_VEC_SAFE_ELT (l->local_typedefs, i, decl) |
3797cb21 DS |
12355 | if (!TREE_USED (decl)) |
12356 | warning_at (DECL_SOURCE_LOCATION (decl), | |
12357 | OPT_Wunused_local_typedefs, | |
12358 | "typedef %qD locally defined but not used", decl); | |
12359 | unused_local_typedefs_warn_count = errorcount; | |
12360 | } | |
12361 | ||
9771b263 | 12362 | vec_free (l->local_typedefs); |
3797cb21 DS |
12363 | } |
12364 | ||
04159acf MP |
12365 | /* Warn about boolean expression compared with an integer value different |
12366 | from true/false. Warns also e.g. about "(i1 == i2) == 2". | |
12367 | LOC is the location of the comparison, CODE is its code, OP0 and OP1 | |
12368 | are the operands of the comparison. The caller must ensure that | |
12369 | either operand is a boolean expression. */ | |
12370 | ||
12371 | void | |
12372 | maybe_warn_bool_compare (location_t loc, enum tree_code code, tree op0, | |
12373 | tree op1) | |
12374 | { | |
12375 | if (TREE_CODE_CLASS (code) != tcc_comparison) | |
12376 | return; | |
12377 | ||
12378 | tree cst = (TREE_CODE (op0) == INTEGER_CST) | |
12379 | ? op0 : (TREE_CODE (op1) == INTEGER_CST) ? op1 : NULL_TREE; | |
12380 | if (!cst) | |
12381 | return; | |
12382 | ||
12383 | if (!integer_zerop (cst) && !integer_onep (cst)) | |
12384 | { | |
716c0ba6 MP |
12385 | int sign = (TREE_CODE (op0) == INTEGER_CST |
12386 | ? tree_int_cst_sgn (cst) : -tree_int_cst_sgn (cst)); | |
04159acf MP |
12387 | if (code == EQ_EXPR |
12388 | || ((code == GT_EXPR || code == GE_EXPR) && sign < 0) | |
12389 | || ((code == LT_EXPR || code == LE_EXPR) && sign > 0)) | |
12390 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12391 | "with boolean expression is always false", cst); | |
12392 | else | |
12393 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12394 | "with boolean expression is always true", cst); | |
12395 | } | |
716c0ba6 MP |
12396 | else if (integer_zerop (cst) || integer_onep (cst)) |
12397 | { | |
577cd070 MP |
12398 | /* If the non-constant operand isn't of a boolean type, we |
12399 | don't want to warn here. */ | |
12400 | tree noncst = TREE_CODE (op0) == INTEGER_CST ? op1 : op0; | |
12401 | /* Handle booleans promoted to integers. */ | |
12402 | if (CONVERT_EXPR_P (noncst) | |
12403 | && TREE_TYPE (noncst) == integer_type_node | |
12404 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (noncst, 0))) == BOOLEAN_TYPE) | |
12405 | /* Warn. */; | |
12406 | else if (TREE_CODE (TREE_TYPE (noncst)) != BOOLEAN_TYPE | |
12407 | && !truth_value_p (TREE_CODE (noncst))) | |
12408 | return; | |
716c0ba6 MP |
12409 | /* Do some magic to get the right diagnostics. */ |
12410 | bool flag = TREE_CODE (op0) == INTEGER_CST; | |
12411 | flag = integer_zerop (cst) ? flag : !flag; | |
12412 | if ((code == GE_EXPR && !flag) || (code == LE_EXPR && flag)) | |
12413 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12414 | "with boolean expression is always true", cst); | |
12415 | else if ((code == LT_EXPR && !flag) || (code == GT_EXPR && flag)) | |
12416 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12417 | "with boolean expression is always false", cst); | |
12418 | } | |
04159acf MP |
12419 | } |
12420 | ||
451b5e48 MP |
12421 | /* Warn if signed left shift overflows. We don't warn |
12422 | about left-shifting 1 into the sign bit in C++14; cf. | |
12423 | <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3367.html#1457> | |
12424 | LOC is a location of the shift; OP0 and OP1 are the operands. | |
12425 | Return true if an overflow is detected, false otherwise. */ | |
12426 | ||
12427 | bool | |
12428 | maybe_warn_shift_overflow (location_t loc, tree op0, tree op1) | |
12429 | { | |
12430 | if (TREE_CODE (op0) != INTEGER_CST | |
12431 | || TREE_CODE (op1) != INTEGER_CST) | |
12432 | return false; | |
12433 | ||
12434 | tree type0 = TREE_TYPE (op0); | |
12435 | unsigned int prec0 = TYPE_PRECISION (type0); | |
12436 | ||
12437 | /* Left-hand operand must be signed. */ | |
12438 | if (TYPE_UNSIGNED (type0)) | |
12439 | return false; | |
12440 | ||
b893e375 MP |
12441 | unsigned int min_prec = (wi::min_precision (op0, SIGNED) |
12442 | + TREE_INT_CST_LOW (op1)); | |
451b5e48 | 12443 | /* Handle the left-shifting 1 into the sign bit case. */ |
b893e375 | 12444 | if (min_prec == prec0 + 1) |
451b5e48 MP |
12445 | { |
12446 | /* Never warn for C++14 onwards. */ | |
12447 | if (cxx_dialect >= cxx14) | |
12448 | return false; | |
12449 | /* Otherwise only if -Wshift-overflow=2. But return | |
12450 | true to signal an overflow for the sake of integer | |
12451 | constant expressions. */ | |
12452 | if (warn_shift_overflow < 2) | |
12453 | return true; | |
12454 | } | |
12455 | ||
451b5e48 MP |
12456 | bool overflowed = min_prec > prec0; |
12457 | if (overflowed && c_inhibit_evaluation_warnings == 0) | |
12458 | warning_at (loc, OPT_Wshift_overflow_, | |
12459 | "result of %qE requires %u bits to represent, " | |
12460 | "but %qT only has %u bits", | |
12461 | build2_loc (loc, LSHIFT_EXPR, type0, op0, op1), | |
12462 | min_prec, type0, prec0); | |
12463 | ||
12464 | return overflowed; | |
12465 | } | |
12466 | ||
c166b898 ILT |
12467 | /* The C and C++ parsers both use vectors to hold function arguments. |
12468 | For efficiency, we keep a cache of unused vectors. This is the | |
12469 | cache. */ | |
12470 | ||
9771b263 DN |
12471 | typedef vec<tree, va_gc> *tree_gc_vec; |
12472 | static GTY((deletable)) vec<tree_gc_vec, va_gc> *tree_vector_cache; | |
c166b898 ILT |
12473 | |
12474 | /* Return a new vector from the cache. If the cache is empty, | |
12475 | allocate a new vector. These vectors are GC'ed, so it is OK if the | |
12476 | pointer is not released.. */ | |
12477 | ||
9771b263 | 12478 | vec<tree, va_gc> * |
c166b898 ILT |
12479 | make_tree_vector (void) |
12480 | { | |
9771b263 DN |
12481 | if (tree_vector_cache && !tree_vector_cache->is_empty ()) |
12482 | return tree_vector_cache->pop (); | |
c166b898 ILT |
12483 | else |
12484 | { | |
9771b263 | 12485 | /* Passing 0 to vec::alloc returns NULL, and our callers require |
c166b898 ILT |
12486 | that we always return a non-NULL value. The vector code uses |
12487 | 4 when growing a NULL vector, so we do too. */ | |
9771b263 DN |
12488 | vec<tree, va_gc> *v; |
12489 | vec_alloc (v, 4); | |
12490 | return v; | |
c166b898 ILT |
12491 | } |
12492 | } | |
12493 | ||
12494 | /* Release a vector of trees back to the cache. */ | |
12495 | ||
12496 | void | |
9771b263 | 12497 | release_tree_vector (vec<tree, va_gc> *vec) |
c166b898 ILT |
12498 | { |
12499 | if (vec != NULL) | |
12500 | { | |
9771b263 DN |
12501 | vec->truncate (0); |
12502 | vec_safe_push (tree_vector_cache, vec); | |
c166b898 ILT |
12503 | } |
12504 | } | |
12505 | ||
12506 | /* Get a new tree vector holding a single tree. */ | |
12507 | ||
9771b263 | 12508 | vec<tree, va_gc> * |
c166b898 ILT |
12509 | make_tree_vector_single (tree t) |
12510 | { | |
9771b263 DN |
12511 | vec<tree, va_gc> *ret = make_tree_vector (); |
12512 | ret->quick_push (t); | |
c166b898 ILT |
12513 | return ret; |
12514 | } | |
12515 | ||
c12ff9d8 JM |
12516 | /* Get a new tree vector of the TREE_VALUEs of a TREE_LIST chain. */ |
12517 | ||
9771b263 | 12518 | vec<tree, va_gc> * |
c12ff9d8 JM |
12519 | make_tree_vector_from_list (tree list) |
12520 | { | |
9771b263 | 12521 | vec<tree, va_gc> *ret = make_tree_vector (); |
c12ff9d8 | 12522 | for (; list; list = TREE_CHAIN (list)) |
9771b263 | 12523 | vec_safe_push (ret, TREE_VALUE (list)); |
c12ff9d8 JM |
12524 | return ret; |
12525 | } | |
12526 | ||
c166b898 ILT |
12527 | /* Get a new tree vector which is a copy of an existing one. */ |
12528 | ||
9771b263 DN |
12529 | vec<tree, va_gc> * |
12530 | make_tree_vector_copy (const vec<tree, va_gc> *orig) | |
c166b898 | 12531 | { |
9771b263 | 12532 | vec<tree, va_gc> *ret; |
c166b898 ILT |
12533 | unsigned int ix; |
12534 | tree t; | |
12535 | ||
12536 | ret = make_tree_vector (); | |
9771b263 DN |
12537 | vec_safe_reserve (ret, vec_safe_length (orig)); |
12538 | FOR_EACH_VEC_SAFE_ELT (orig, ix, t) | |
12539 | ret->quick_push (t); | |
c166b898 ILT |
12540 | return ret; |
12541 | } | |
12542 | ||
a9aa2c3a NF |
12543 | /* Return true if KEYWORD starts a type specifier. */ |
12544 | ||
12545 | bool | |
12546 | keyword_begins_type_specifier (enum rid keyword) | |
12547 | { | |
12548 | switch (keyword) | |
12549 | { | |
38b7bc7f | 12550 | case RID_AUTO_TYPE: |
a9aa2c3a NF |
12551 | case RID_INT: |
12552 | case RID_CHAR: | |
12553 | case RID_FLOAT: | |
12554 | case RID_DOUBLE: | |
12555 | case RID_VOID: | |
a9aa2c3a NF |
12556 | case RID_UNSIGNED: |
12557 | case RID_LONG: | |
12558 | case RID_SHORT: | |
12559 | case RID_SIGNED: | |
12560 | case RID_DFLOAT32: | |
12561 | case RID_DFLOAT64: | |
12562 | case RID_DFLOAT128: | |
12563 | case RID_FRACT: | |
12564 | case RID_ACCUM: | |
12565 | case RID_BOOL: | |
12566 | case RID_WCHAR: | |
12567 | case RID_CHAR16: | |
12568 | case RID_CHAR32: | |
12569 | case RID_SAT: | |
12570 | case RID_COMPLEX: | |
12571 | case RID_TYPEOF: | |
12572 | case RID_STRUCT: | |
12573 | case RID_CLASS: | |
12574 | case RID_UNION: | |
12575 | case RID_ENUM: | |
12576 | return true; | |
12577 | default: | |
78a7c317 DD |
12578 | if (keyword >= RID_FIRST_INT_N |
12579 | && keyword < RID_FIRST_INT_N + NUM_INT_N_ENTS | |
12580 | && int_n_enabled_p[keyword-RID_FIRST_INT_N]) | |
12581 | return true; | |
a9aa2c3a NF |
12582 | return false; |
12583 | } | |
12584 | } | |
12585 | ||
12586 | /* Return true if KEYWORD names a type qualifier. */ | |
12587 | ||
12588 | bool | |
12589 | keyword_is_type_qualifier (enum rid keyword) | |
12590 | { | |
12591 | switch (keyword) | |
12592 | { | |
12593 | case RID_CONST: | |
12594 | case RID_VOLATILE: | |
12595 | case RID_RESTRICT: | |
267bac10 | 12596 | case RID_ATOMIC: |
a9aa2c3a NF |
12597 | return true; |
12598 | default: | |
12599 | return false; | |
12600 | } | |
12601 | } | |
12602 | ||
12603 | /* Return true if KEYWORD names a storage class specifier. | |
12604 | ||
12605 | RID_TYPEDEF is not included in this list despite `typedef' being | |
12606 | listed in C99 6.7.1.1. 6.7.1.3 indicates that `typedef' is listed as | |
12607 | such for syntactic convenience only. */ | |
12608 | ||
12609 | bool | |
12610 | keyword_is_storage_class_specifier (enum rid keyword) | |
12611 | { | |
12612 | switch (keyword) | |
12613 | { | |
12614 | case RID_STATIC: | |
12615 | case RID_EXTERN: | |
12616 | case RID_REGISTER: | |
12617 | case RID_AUTO: | |
12618 | case RID_MUTABLE: | |
12619 | case RID_THREAD: | |
12620 | return true; | |
12621 | default: | |
12622 | return false; | |
12623 | } | |
12624 | } | |
12625 | ||
ba9e6dd5 NF |
12626 | /* Return true if KEYWORD names a function-specifier [dcl.fct.spec]. */ |
12627 | ||
12628 | static bool | |
12629 | keyword_is_function_specifier (enum rid keyword) | |
12630 | { | |
12631 | switch (keyword) | |
12632 | { | |
12633 | case RID_INLINE: | |
bbceee64 | 12634 | case RID_NORETURN: |
ba9e6dd5 NF |
12635 | case RID_VIRTUAL: |
12636 | case RID_EXPLICIT: | |
12637 | return true; | |
12638 | default: | |
12639 | return false; | |
12640 | } | |
12641 | } | |
12642 | ||
12643 | /* Return true if KEYWORD names a decl-specifier [dcl.spec] or a | |
12644 | declaration-specifier (C99 6.7). */ | |
12645 | ||
12646 | bool | |
12647 | keyword_is_decl_specifier (enum rid keyword) | |
12648 | { | |
12649 | if (keyword_is_storage_class_specifier (keyword) | |
12650 | || keyword_is_type_qualifier (keyword) | |
12651 | || keyword_is_function_specifier (keyword)) | |
12652 | return true; | |
12653 | ||
12654 | switch (keyword) | |
12655 | { | |
12656 | case RID_TYPEDEF: | |
12657 | case RID_FRIEND: | |
12658 | case RID_CONSTEXPR: | |
12659 | return true; | |
12660 | default: | |
12661 | return false; | |
12662 | } | |
12663 | } | |
12664 | ||
81f653d6 NF |
12665 | /* Initialize language-specific-bits of tree_contains_struct. */ |
12666 | ||
12667 | void | |
12668 | c_common_init_ts (void) | |
12669 | { | |
12670 | MARK_TS_TYPED (C_MAYBE_CONST_EXPR); | |
12671 | MARK_TS_TYPED (EXCESS_PRECISION_EXPR); | |
36536d79 | 12672 | MARK_TS_TYPED (ARRAY_NOTATION_REF); |
81f653d6 NF |
12673 | } |
12674 | ||
3ce4f9e4 ESR |
12675 | /* Build a user-defined numeric literal out of an integer constant type VALUE |
12676 | with identifier SUFFIX. */ | |
12677 | ||
12678 | tree | |
2d7aa578 ESR |
12679 | build_userdef_literal (tree suffix_id, tree value, |
12680 | enum overflow_type overflow, tree num_string) | |
3ce4f9e4 ESR |
12681 | { |
12682 | tree literal = make_node (USERDEF_LITERAL); | |
12683 | USERDEF_LITERAL_SUFFIX_ID (literal) = suffix_id; | |
12684 | USERDEF_LITERAL_VALUE (literal) = value; | |
2d7aa578 | 12685 | USERDEF_LITERAL_OVERFLOW (literal) = overflow; |
3ce4f9e4 ESR |
12686 | USERDEF_LITERAL_NUM_STRING (literal) = num_string; |
12687 | return literal; | |
12688 | } | |
12689 | ||
7edaa4d2 | 12690 | /* For vector[index], convert the vector to a |
aa7da51a JJ |
12691 | pointer of the underlying type. Return true if the resulting |
12692 | ARRAY_REF should not be an lvalue. */ | |
12693 | ||
12694 | bool | |
7edaa4d2 | 12695 | convert_vector_to_pointer_for_subscript (location_t loc, |
aa7da51a | 12696 | tree *vecp, tree index) |
7edaa4d2 | 12697 | { |
aa7da51a | 12698 | bool ret = false; |
31521951 | 12699 | if (VECTOR_TYPE_P (TREE_TYPE (*vecp))) |
7edaa4d2 MG |
12700 | { |
12701 | tree type = TREE_TYPE (*vecp); | |
12702 | tree type1; | |
12703 | ||
aa7da51a | 12704 | ret = !lvalue_p (*vecp); |
7edaa4d2 | 12705 | if (TREE_CODE (index) == INTEGER_CST) |
cc269bb6 | 12706 | if (!tree_fits_uhwi_p (index) |
7d362f6c | 12707 | || tree_to_uhwi (index) >= TYPE_VECTOR_SUBPARTS (type)) |
7edaa4d2 MG |
12708 | warning_at (loc, OPT_Warray_bounds, "index value is out of bound"); |
12709 | ||
aa7da51a JJ |
12710 | if (ret) |
12711 | { | |
b731b390 | 12712 | tree tmp = create_tmp_var_raw (type); |
aa7da51a JJ |
12713 | DECL_SOURCE_LOCATION (tmp) = loc; |
12714 | *vecp = c_save_expr (*vecp); | |
12715 | if (TREE_CODE (*vecp) == C_MAYBE_CONST_EXPR) | |
12716 | { | |
12717 | bool non_const = C_MAYBE_CONST_EXPR_NON_CONST (*vecp); | |
12718 | *vecp = C_MAYBE_CONST_EXPR_EXPR (*vecp); | |
12719 | *vecp | |
12720 | = c_wrap_maybe_const (build4 (TARGET_EXPR, type, tmp, | |
12721 | *vecp, NULL_TREE, NULL_TREE), | |
12722 | non_const); | |
12723 | } | |
12724 | else | |
12725 | *vecp = build4 (TARGET_EXPR, type, tmp, *vecp, | |
12726 | NULL_TREE, NULL_TREE); | |
12727 | SET_EXPR_LOCATION (*vecp, loc); | |
12728 | c_common_mark_addressable_vec (tmp); | |
12729 | } | |
12730 | else | |
12731 | c_common_mark_addressable_vec (*vecp); | |
7edaa4d2 | 12732 | type = build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type)); |
7edaa4d2 | 12733 | type1 = build_pointer_type (TREE_TYPE (*vecp)); |
b0f1bf36 RB |
12734 | bool ref_all = TYPE_REF_CAN_ALIAS_ALL (type1); |
12735 | if (!ref_all | |
12736 | && !DECL_P (*vecp)) | |
12737 | { | |
12738 | /* If the original vector isn't declared may_alias and it | |
12739 | isn't a bare vector look if the subscripting would | |
12740 | alias the vector we subscript, and if not, force ref-all. */ | |
12741 | alias_set_type vecset = get_alias_set (*vecp); | |
12742 | alias_set_type sset = get_alias_set (type); | |
12743 | if (!alias_sets_must_conflict_p (sset, vecset) | |
12744 | && !alias_set_subset_of (sset, vecset)) | |
12745 | ref_all = true; | |
12746 | } | |
12747 | type = build_pointer_type_for_mode (type, ptr_mode, ref_all); | |
7edaa4d2 MG |
12748 | *vecp = build1 (ADDR_EXPR, type1, *vecp); |
12749 | *vecp = convert (type, *vecp); | |
12750 | } | |
aa7da51a | 12751 | return ret; |
7edaa4d2 MG |
12752 | } |
12753 | ||
a212e43f MG |
12754 | /* Determine which of the operands, if any, is a scalar that needs to be |
12755 | converted to a vector, for the range of operations. */ | |
12756 | enum stv_conv | |
12757 | scalar_to_vector (location_t loc, enum tree_code code, tree op0, tree op1, | |
12758 | bool complain) | |
12759 | { | |
12760 | tree type0 = TREE_TYPE (op0); | |
12761 | tree type1 = TREE_TYPE (op1); | |
12762 | bool integer_only_op = false; | |
12763 | enum stv_conv ret = stv_firstarg; | |
12764 | ||
31521951 | 12765 | gcc_assert (VECTOR_TYPE_P (type0) || VECTOR_TYPE_P (type1)); |
a212e43f MG |
12766 | switch (code) |
12767 | { | |
12768 | /* Most GENERIC binary expressions require homogeneous arguments. | |
12769 | LSHIFT_EXPR and RSHIFT_EXPR are exceptions and accept a first | |
12770 | argument that is a vector and a second one that is a scalar, so | |
12771 | we never return stv_secondarg for them. */ | |
12772 | case RSHIFT_EXPR: | |
12773 | case LSHIFT_EXPR: | |
12774 | if (TREE_CODE (type0) == INTEGER_TYPE | |
12775 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
12776 | { | |
68fca595 | 12777 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
a212e43f MG |
12778 | { |
12779 | if (complain) | |
12780 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12781 | "involves truncation", type0, type1); | |
12782 | return stv_error; | |
12783 | } | |
12784 | else | |
12785 | return stv_firstarg; | |
12786 | } | |
12787 | break; | |
12788 | ||
12789 | case BIT_IOR_EXPR: | |
12790 | case BIT_XOR_EXPR: | |
12791 | case BIT_AND_EXPR: | |
12792 | integer_only_op = true; | |
12793 | /* ... fall through ... */ | |
12794 | ||
93100c6b MG |
12795 | case VEC_COND_EXPR: |
12796 | ||
a212e43f MG |
12797 | case PLUS_EXPR: |
12798 | case MINUS_EXPR: | |
12799 | case MULT_EXPR: | |
12800 | case TRUNC_DIV_EXPR: | |
12801 | case CEIL_DIV_EXPR: | |
12802 | case FLOOR_DIV_EXPR: | |
12803 | case ROUND_DIV_EXPR: | |
12804 | case EXACT_DIV_EXPR: | |
12805 | case TRUNC_MOD_EXPR: | |
12806 | case FLOOR_MOD_EXPR: | |
12807 | case RDIV_EXPR: | |
12808 | case EQ_EXPR: | |
12809 | case NE_EXPR: | |
12810 | case LE_EXPR: | |
12811 | case GE_EXPR: | |
12812 | case LT_EXPR: | |
12813 | case GT_EXPR: | |
12814 | /* What about UNLT_EXPR? */ | |
31521951 | 12815 | if (VECTOR_TYPE_P (type0)) |
a212e43f | 12816 | { |
a212e43f | 12817 | ret = stv_secondarg; |
6b4db501 MM |
12818 | std::swap (type0, type1); |
12819 | std::swap (op0, op1); | |
a212e43f MG |
12820 | } |
12821 | ||
12822 | if (TREE_CODE (type0) == INTEGER_TYPE | |
12823 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
12824 | { | |
68fca595 | 12825 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
a212e43f MG |
12826 | { |
12827 | if (complain) | |
12828 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12829 | "involves truncation", type0, type1); | |
12830 | return stv_error; | |
12831 | } | |
12832 | return ret; | |
12833 | } | |
12834 | else if (!integer_only_op | |
12835 | /* Allow integer --> real conversion if safe. */ | |
12836 | && (TREE_CODE (type0) == REAL_TYPE | |
12837 | || TREE_CODE (type0) == INTEGER_TYPE) | |
12838 | && SCALAR_FLOAT_TYPE_P (TREE_TYPE (type1))) | |
12839 | { | |
68fca595 | 12840 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
a212e43f MG |
12841 | { |
12842 | if (complain) | |
12843 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12844 | "involves truncation", type0, type1); | |
12845 | return stv_error; | |
12846 | } | |
12847 | return ret; | |
12848 | } | |
12849 | default: | |
12850 | break; | |
12851 | } | |
12852 | ||
12853 | return stv_nothing; | |
12854 | } | |
12855 | ||
e28d52cf DS |
12856 | /* Return true iff ALIGN is an integral constant that is a fundamental |
12857 | alignment, as defined by [basic.align] in the c++-11 | |
12858 | specifications. | |
12859 | ||
12860 | That is: | |
12861 | ||
12862 | [A fundamental alignment is represented by an alignment less than or | |
12863 | equal to the greatest alignment supported by the implementation | |
12864 | in all contexts, which is equal to | |
12865 | alignof(max_align_t)]. */ | |
12866 | ||
12867 | bool | |
12868 | cxx_fundamental_alignment_p (unsigned align) | |
12869 | { | |
12870 | return (align <= MAX (TYPE_ALIGN (long_long_integer_type_node), | |
12871 | TYPE_ALIGN (long_double_type_node))); | |
12872 | } | |
12873 | ||
f04dda30 MP |
12874 | /* Return true if T is a pointer to a zero-sized aggregate. */ |
12875 | ||
12876 | bool | |
12877 | pointer_to_zero_sized_aggr_p (tree t) | |
12878 | { | |
12879 | if (!POINTER_TYPE_P (t)) | |
12880 | return false; | |
12881 | t = TREE_TYPE (t); | |
12882 | return (TYPE_SIZE (t) && integer_zerop (TYPE_SIZE (t))); | |
12883 | } | |
12884 | ||
1807ffc1 MS |
12885 | /* For an EXPR of a FUNCTION_TYPE that references a GCC built-in function |
12886 | with no library fallback or for an ADDR_EXPR whose operand is such type | |
12887 | issues an error pointing to the location LOC. | |
12888 | Returns true when the expression has been diagnosed and false | |
12889 | otherwise. */ | |
12890 | bool | |
12891 | reject_gcc_builtin (const_tree expr, location_t loc /* = UNKNOWN_LOCATION */) | |
12892 | { | |
12893 | if (TREE_CODE (expr) == ADDR_EXPR) | |
12894 | expr = TREE_OPERAND (expr, 0); | |
12895 | ||
12896 | if (TREE_TYPE (expr) | |
12897 | && TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE | |
12898 | && DECL_P (expr) | |
12899 | /* The intersection of DECL_BUILT_IN and DECL_IS_BUILTIN avoids | |
12900 | false positives for user-declared built-ins such as abs or | |
12901 | strlen, and for C++ operators new and delete. | |
12902 | The c_decl_implicit() test avoids false positives for implicitly | |
12903 | declared built-ins with library fallbacks (such as abs). */ | |
12904 | && DECL_BUILT_IN (expr) | |
12905 | && DECL_IS_BUILTIN (expr) | |
12906 | && !c_decl_implicit (expr) | |
12907 | && !DECL_ASSEMBLER_NAME_SET_P (expr)) | |
12908 | { | |
12909 | if (loc == UNKNOWN_LOCATION) | |
12910 | loc = EXPR_LOC_OR_LOC (expr, input_location); | |
12911 | ||
12912 | /* Reject arguments that are built-in functions with | |
12913 | no library fallback. */ | |
12914 | error_at (loc, "built-in function %qE must be directly called", expr); | |
12915 | ||
12916 | return true; | |
12917 | } | |
12918 | ||
12919 | return false; | |
12920 | } | |
12921 | ||
39dabefd | 12922 | #include "gt-c-family-c-common.h" |