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b0fc3e72 | 1 | /* Subroutines shared by all languages that are variants of C. |
d353bf18 | 2 | Copyright (C) 1992-2015 Free Software Foundation, Inc. |
b0fc3e72 | 3 | |
f12b58b3 | 4 | This file is part of GCC. |
b0fc3e72 | 5 | |
f12b58b3 | 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 | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 9 | version. |
b0fc3e72 | 10 | |
f12b58b3 | 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. | |
b0fc3e72 | 15 | |
16 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
b0fc3e72 | 19 | |
b20a8bb4 | 20 | #define GCC_C_COMMON_C |
21 | ||
b0fc3e72 | 22 | #include "config.h" |
405711de | 23 | #include "system.h" |
805e22b2 | 24 | #include "coretypes.h" |
7ff8db31 | 25 | #include "c-common.h" |
805e22b2 | 26 | #include "tm.h" |
e48d0f41 | 27 | #include "intl.h" |
b0fc3e72 | 28 | #include "tree.h" |
9ed99284 | 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" | |
b0fc3e72 | 36 | #include "flags.h" |
a3fa7feb | 37 | #include "c-pragma.h" |
6c536c4f | 38 | #include "c-objc.h" |
d8c9779c | 39 | #include "tm_p.h" |
4e91a871 | 40 | #include "obstack.h" |
a654e028 | 41 | #include "cpplib.h" |
8ee295a7 | 42 | #include "target.h" |
218e3e4e | 43 | #include "common/common-target.h" |
96554925 | 44 | #include "langhooks.h" |
f3dde807 | 45 | #include "tree-inline.h" |
69579044 | 46 | #include "toplev.h" |
7f5f3953 | 47 | #include "diagnostic.h" |
4ee9c684 | 48 | #include "tree-iterator.h" |
e08bd2f4 | 49 | #include "opts.h" |
1140c305 | 50 | #include "plugin-api.h" |
1140c305 | 51 | #include "hard-reg-set.h" |
1140c305 | 52 | #include "function.h" |
53 | #include "ipa-ref.h" | |
62eec3b4 | 54 | #include "cgraph.h" |
b9fc964a | 55 | #include "target-def.h" |
a8783bee | 56 | #include "gimplify.h" |
e913b5cd | 57 | #include "wide-int-print.h" |
c61ef207 | 58 | #include "gimple-expr.h" |
fd6f6435 | 59 | |
90cc7820 | 60 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
a654e028 | 61 | |
de801c28 | 62 | /* Mode used to build pointers (VOIDmode means ptr_mode). */ |
63 | ||
64 | machine_mode c_default_pointer_mode = VOIDmode; | |
65 | ||
72040e7e | 66 | /* The following symbols are subsumed in the c_global_trees array, and |
44e9fa65 | 67 | listed here individually for documentation purposes. |
72040e7e | 68 | |
69 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
70 | ||
71 | tree short_integer_type_node; | |
72 | tree long_integer_type_node; | |
73 | tree long_long_integer_type_node; | |
74 | ||
75 | tree short_unsigned_type_node; | |
76 | tree long_unsigned_type_node; | |
77 | tree long_long_unsigned_type_node; | |
78 | ||
3c2239cf | 79 | tree truthvalue_type_node; |
80 | tree truthvalue_false_node; | |
81 | tree truthvalue_true_node; | |
72040e7e | 82 | |
83 | tree ptrdiff_type_node; | |
84 | ||
85 | tree unsigned_char_type_node; | |
86 | tree signed_char_type_node; | |
87 | tree wchar_type_node; | |
72040e7e | 88 | |
924bbf02 | 89 | tree char16_type_node; |
90 | tree char32_type_node; | |
91 | ||
72040e7e | 92 | tree float_type_node; |
93 | tree double_type_node; | |
94 | tree long_double_type_node; | |
95 | ||
96 | tree complex_integer_type_node; | |
97 | tree complex_float_type_node; | |
98 | tree complex_double_type_node; | |
99 | tree complex_long_double_type_node; | |
100 | ||
c4503c0a | 101 | tree dfloat32_type_node; |
102 | tree dfloat64_type_node; | |
103 | tree_dfloat128_type_node; | |
104 | ||
72040e7e | 105 | tree intQI_type_node; |
106 | tree intHI_type_node; | |
107 | tree intSI_type_node; | |
108 | tree intDI_type_node; | |
109 | tree intTI_type_node; | |
110 | ||
111 | tree unsigned_intQI_type_node; | |
112 | tree unsigned_intHI_type_node; | |
113 | tree unsigned_intSI_type_node; | |
114 | tree unsigned_intDI_type_node; | |
115 | tree unsigned_intTI_type_node; | |
116 | ||
117 | tree widest_integer_literal_type_node; | |
118 | tree widest_unsigned_literal_type_node; | |
119 | ||
120 | Nodes for types `void *' and `const void *'. | |
121 | ||
122 | tree ptr_type_node, const_ptr_type_node; | |
123 | ||
124 | Nodes for types `char *' and `const char *'. | |
125 | ||
126 | tree string_type_node, const_string_type_node; | |
127 | ||
128 | Type `char[SOMENUMBER]'. | |
129 | Used when an array of char is needed and the size is irrelevant. | |
130 | ||
131 | tree char_array_type_node; | |
132 | ||
72040e7e | 133 | Type `wchar_t[SOMENUMBER]' or something like it. |
134 | Used when a wide string literal is created. | |
135 | ||
136 | tree wchar_array_type_node; | |
137 | ||
924bbf02 | 138 | Type `char16_t[SOMENUMBER]' or something like it. |
139 | Used when a UTF-16 string literal is created. | |
140 | ||
141 | tree char16_array_type_node; | |
142 | ||
143 | Type `char32_t[SOMENUMBER]' or something like it. | |
144 | Used when a UTF-32 string literal is created. | |
145 | ||
146 | tree char32_array_type_node; | |
147 | ||
72040e7e | 148 | Type `int ()' -- used for implicit declaration of functions. |
149 | ||
150 | tree default_function_type; | |
151 | ||
72040e7e | 152 | A VOID_TYPE node, packaged in a TREE_LIST. |
153 | ||
154 | tree void_list_node; | |
155 | ||
734c98be | 156 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
65b7f83f | 157 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
158 | VAR_DECLS, but C++ does.) | |
71d9fc9b | 159 | |
65b7f83f | 160 | tree function_name_decl_node; |
734c98be | 161 | tree pretty_function_name_decl_node; |
65b7f83f | 162 | tree c99_function_name_decl_node; |
163 | ||
164 | Stack of nested function name VAR_DECLs. | |
1cae46be | 165 | |
65b7f83f | 166 | tree saved_function_name_decls; |
71d9fc9b | 167 | |
72040e7e | 168 | */ |
169 | ||
170 | tree c_global_trees[CTI_MAX]; | |
573aba85 | 171 | \f |
574a6990 | 172 | /* Switches common to the C front ends. */ |
173 | ||
f7070933 | 174 | /* Nonzero means don't output line number information. */ |
175 | ||
176 | char flag_no_line_commands; | |
177 | ||
178 | /* Nonzero causes -E output not to be done, but directives such as | |
179 | #define that have side effects are still obeyed. */ | |
180 | ||
181 | char flag_no_output; | |
182 | ||
183 | /* Nonzero means dump macros in some fashion. */ | |
184 | ||
185 | char flag_dump_macros; | |
186 | ||
187 | /* Nonzero means pass #include lines through to the output. */ | |
188 | ||
189 | char flag_dump_includes; | |
190 | ||
d718b525 | 191 | /* Nonzero means process PCH files while preprocessing. */ |
192 | ||
193 | bool flag_pch_preprocess; | |
194 | ||
573aba85 | 195 | /* The file name to which we should write a precompiled header, or |
196 | NULL if no header will be written in this compile. */ | |
197 | ||
198 | const char *pch_file; | |
199 | ||
1ed9d5f5 | 200 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
201 | user's namespace. */ | |
202 | int flag_iso; | |
203 | ||
574a6990 | 204 | /* C/ObjC language option variables. */ |
205 | ||
206 | ||
574a6990 | 207 | /* Nonzero means allow type mismatches in conditional expressions; |
208 | just make their values `void'. */ | |
209 | ||
210 | int flag_cond_mismatch; | |
211 | ||
212 | /* Nonzero means enable C89 Amendment 1 features. */ | |
213 | ||
214 | int flag_isoc94; | |
215 | ||
32074525 | 216 | /* Nonzero means use the ISO C99 (or C11) dialect of C. */ |
574a6990 | 217 | |
218 | int flag_isoc99; | |
219 | ||
32074525 | 220 | /* Nonzero means use the ISO C11 dialect of C. */ |
39012afb | 221 | |
32074525 | 222 | int flag_isoc11; |
39012afb | 223 | |
8b332087 | 224 | /* Nonzero means that we have builtin functions, and main is an int. */ |
574a6990 | 225 | |
226 | int flag_hosted = 1; | |
227 | ||
574a6990 | 228 | |
229 | /* ObjC language option variables. */ | |
230 | ||
231 | ||
574a6990 | 232 | /* Tells the compiler that this is a special run. Do not perform any |
233 | compiling, instead we are to test some platform dependent features | |
234 | and output a C header file with appropriate definitions. */ | |
235 | ||
236 | int print_struct_values; | |
237 | ||
f0b5f617 | 238 | /* Tells the compiler what is the constant string class for ObjC. */ |
574a6990 | 239 | |
240 | const char *constant_string_class_name; | |
241 | ||
574a6990 | 242 | |
243 | /* C++ language option variables. */ | |
244 | ||
245 | ||
574a6990 | 246 | /* Nonzero means generate separate instantiation control files and |
247 | juggle them at link time. */ | |
248 | ||
249 | int flag_use_repository; | |
250 | ||
d875b9d2 | 251 | /* The C++ dialect being used. Default set in c_common_post_options. */ |
0fe6eeac | 252 | |
d875b9d2 | 253 | enum cxx_dialect cxx_dialect = cxx_unset; |
0fe6eeac | 254 | |
9dcd0d49 | 255 | /* Maximum template instantiation depth. This limit exists to limit the |
8ce59854 | 256 | time it takes to notice excessively recursive template instantiations. |
574a6990 | 257 | |
8ce59854 | 258 | The default is lower than the 1024 recommended by the C++0x standard |
259 | because G++ runs out of stack before 1024 with highly recursive template | |
260 | argument deduction substitution (g++.dg/cpp0x/enum11.C). */ | |
261 | ||
262 | int max_tinst_depth = 900; | |
574a6990 | 263 | |
988fc1d1 | 264 | /* The elements of `ridpointers' are identifier nodes for the reserved |
265 | type names and storage classes. It is indexed by a RID_... value. */ | |
266 | tree *ridpointers; | |
267 | ||
e60a6f7b | 268 | tree (*make_fname_decl) (location_t, tree, int); |
9e5a737d | 269 | |
48d94ede | 270 | /* Nonzero means don't warn about problems that occur when the code is |
271 | executed. */ | |
272 | int c_inhibit_evaluation_warnings; | |
e78703c1 | 273 | |
93be21c0 | 274 | /* Whether we are building a boolean conversion inside |
275 | convert_for_assignment, or some other late binary operation. If | |
276 | build_binary_op is called for C (from code shared by C and C++) in | |
277 | this case, then the operands have already been folded and the | |
278 | result will not be folded again, so C_MAYBE_CONST_EXPR should not | |
279 | be generated. */ | |
280 | bool in_late_binary_op; | |
281 | ||
7f5f3953 | 282 | /* Whether lexing has been completed, so subsequent preprocessor |
283 | errors should use the compiler's input_location. */ | |
284 | bool done_lexing = false; | |
285 | ||
2c0e001b | 286 | /* Information about how a function name is generated. */ |
65b7f83f | 287 | struct fname_var_t |
288 | { | |
e99c3a1d | 289 | tree *const decl; /* pointer to the VAR_DECL. */ |
290 | const unsigned rid; /* RID number for the identifier. */ | |
291 | const int pretty; /* How pretty is it? */ | |
65b7f83f | 292 | }; |
293 | ||
2c0e001b | 294 | /* The three ways of getting then name of the current function. */ |
65b7f83f | 295 | |
296 | const struct fname_var_t fname_vars[] = | |
297 | { | |
2c0e001b | 298 | /* C99 compliant __func__, must be first. */ |
65b7f83f | 299 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
2c0e001b | 300 | /* GCC __FUNCTION__ compliant. */ |
65b7f83f | 301 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
2c0e001b | 302 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
65b7f83f | 303 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
304 | {NULL, 0, 0}, | |
305 | }; | |
306 | ||
79396169 | 307 | /* Global visibility options. */ |
308 | struct visibility_flags visibility_options; | |
309 | ||
aac24642 | 310 | static tree c_fully_fold_internal (tree expr, bool, bool *, bool *, bool); |
2d2f6a15 | 311 | static tree check_case_value (location_t, tree); |
f61a9bc2 | 312 | static bool check_case_bounds (location_t, tree, tree, tree *, tree *); |
be43ff5a | 313 | |
1cae46be | 314 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
315 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
316 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
317 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
5de92639 | 318 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
319 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
a9196da9 | 320 | static tree handle_no_sanitize_address_attribute (tree *, tree, tree, |
321 | int, bool *); | |
d413ffdd | 322 | static tree handle_no_address_safety_analysis_attribute (tree *, tree, tree, |
323 | int, bool *); | |
05f893e1 | 324 | static tree handle_no_sanitize_undefined_attribute (tree *, tree, tree, int, |
325 | bool *); | |
947aa916 | 326 | static tree handle_stack_protect_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 327 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
bdb1f0d1 | 328 | static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); |
85fbea97 | 329 | static tree handle_noicf_attribute (tree *, tree, tree, int, bool *); |
7bd95dfd | 330 | static tree handle_leaf_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 331 | static tree handle_always_inline_attribute (tree *, tree, tree, int, |
332 | bool *); | |
1b16fc45 | 333 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
334 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0cdd9887 | 335 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
10fc867f | 336 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 337 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
338 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
62eec3b4 | 339 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
340 | bool *); | |
6b722052 | 341 | static tree handle_no_reorder_attribute (tree *, tree, tree, int, |
342 | bool *); | |
1cae46be | 343 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
344 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
345 | int, bool *); | |
346 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
347 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
348 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
349 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
350 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
351 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
4641882f | 352 | static tree handle_noplt_attribute (tree *, tree, tree, int, bool *) ; |
85c0a25c | 353 | static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); |
354 | static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); | |
1cae46be | 355 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); |
f4a30bd7 | 356 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
1cae46be | 357 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
358 | bool *); | |
359 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
360 | bool *); | |
361 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
362 | tree, int, bool *); | |
363 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
26d1c5ff | 364 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 365 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
366 | bool *); | |
367 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
4c0315d0 | 368 | static tree handle_tm_attribute (tree *, tree, tree, int, bool *); |
369 | static tree handle_tm_wrap_attribute (tree *, tree, tree, int, bool *); | |
fc09b200 | 370 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 371 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
372 | bool *); | |
373 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
374 | bool *); | |
375 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
376 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
377 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
8a8cdb8d | 378 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
379 | bool *); | |
bf6c8de0 | 380 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5c26b42 | 381 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
4a29c97c | 382 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
237e78b1 | 383 | static tree handle_alloc_align_attribute (tree *, tree, tree, int, bool *); |
384 | static tree handle_assume_aligned_attribute (tree *, tree, tree, int, bool *); | |
24470055 | 385 | static tree handle_target_attribute (tree *, tree, tree, int, bool *); |
46f8e3b0 | 386 | static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); |
4c0315d0 | 387 | static tree ignore_attribute (tree *, tree, tree, int, bool *); |
48b14f50 | 388 | static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); |
8ce86007 | 389 | static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); |
a96c3cc1 | 390 | static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *); |
d7dcba40 | 391 | static tree handle_returns_nonnull_attribute (tree *, tree, tree, int, bool *); |
bc7bff74 | 392 | static tree handle_omp_declare_simd_attribute (tree *, tree, tree, int, |
393 | bool *); | |
394 | static tree handle_omp_declare_target_attribute (tree *, tree, tree, int, | |
395 | bool *); | |
74691f46 | 396 | static tree handle_designated_init_attribute (tree *, tree, tree, int, bool *); |
058a1b7a | 397 | static tree handle_bnd_variable_size_attribute (tree *, tree, tree, int, bool *); |
398 | static tree handle_bnd_legacy (tree *, tree, tree, int, bool *); | |
399 | static tree handle_bnd_instrument (tree *, tree, tree, int, bool *); | |
1cae46be | 400 | |
d01f58f9 | 401 | static void check_function_nonnull (tree, int, tree *); |
1cae46be | 402 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
403 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
404 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
860251be | 405 | static int resort_field_decl_cmp (const void *, const void *); |
dbf6c367 | 406 | |
5c6e5756 | 407 | /* Reserved words. The third field is a mask: keywords are disabled |
408 | if they match the mask. | |
409 | ||
410 | Masks for languages: | |
411 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
412 | C --std=c99: D_CXXONLY | D_OBJC | |
413 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
414 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
415 | C++ --std=c0x: D_CONLY | D_OBJC | |
416 | ObjC++ is like C++ except that D_OBJC is not set | |
417 | ||
418 | If -fno-asm is used, D_ASM is added to the mask. If | |
419 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
420 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
b27e241e | 421 | In C with -Wc++-compat, we warn if D_CXXWARN is set. |
5c6e5756 | 422 | |
b27e241e | 423 | Note the complication of the D_CXX_OBJC keywords. These are |
424 | reserved words such as 'class'. In C++, 'class' is a reserved | |
425 | word. In Objective-C++ it is too. In Objective-C, it is a | |
426 | reserved word too, but only if it follows an '@' sign. | |
427 | */ | |
5c6e5756 | 428 | const struct c_common_resword c_common_reswords[] = |
429 | { | |
83e25171 | 430 | { "_Alignas", RID_ALIGNAS, D_CONLY }, |
431 | { "_Alignof", RID_ALIGNOF, D_CONLY }, | |
b560fabd | 432 | { "_Atomic", RID_ATOMIC, D_CONLY }, |
5c6e5756 | 433 | { "_Bool", RID_BOOL, D_CONLY }, |
434 | { "_Complex", RID_COMPLEX, 0 }, | |
d037099f | 435 | { "_Cilk_spawn", RID_CILK_SPAWN, 0 }, |
436 | { "_Cilk_sync", RID_CILK_SYNC, 0 }, | |
40750995 | 437 | { "_Cilk_for", RID_CILK_FOR, 0 }, |
c1800156 | 438 | { "_Imaginary", RID_IMAGINARY, D_CONLY }, |
5c6e5756 | 439 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, |
440 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
441 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
442 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
443 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
444 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
f80e7755 | 445 | { "_Static_assert", RID_STATIC_ASSERT, D_CONLY }, |
985c6e3a | 446 | { "_Noreturn", RID_NORETURN, D_CONLY }, |
7aa04c8d | 447 | { "_Generic", RID_GENERIC, D_CONLY }, |
d184e0c0 | 448 | { "_Thread_local", RID_THREAD, D_CONLY }, |
5c6e5756 | 449 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, |
450 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
451 | { "__alignof", RID_ALIGNOF, 0 }, | |
452 | { "__alignof__", RID_ALIGNOF, 0 }, | |
453 | { "__asm", RID_ASM, 0 }, | |
454 | { "__asm__", RID_ASM, 0 }, | |
455 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
456 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
4fba5eb9 | 457 | { "__auto_type", RID_AUTO_TYPE, D_CONLY }, |
e6014a82 | 458 | { "__bases", RID_BASES, D_CXXONLY }, |
6f58cf06 | 459 | { "__builtin_call_with_static_chain", |
460 | RID_BUILTIN_CALL_WITH_STATIC_CHAIN, D_CONLY }, | |
5c6e5756 | 461 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, |
bff4ad11 | 462 | { "__builtin_complex", RID_BUILTIN_COMPLEX, D_CONLY }, |
bf0cb017 | 463 | { "__builtin_shuffle", RID_BUILTIN_SHUFFLE, 0 }, |
5c6e5756 | 464 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, |
465 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
466 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
467 | { "__complex", RID_COMPLEX, 0 }, | |
468 | { "__complex__", RID_COMPLEX, 0 }, | |
469 | { "__const", RID_CONST, 0 }, | |
470 | { "__const__", RID_CONST, 0 }, | |
471 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
e6014a82 | 472 | { "__direct_bases", RID_DIRECT_BASES, D_CXXONLY }, |
5c6e5756 | 473 | { "__extension__", RID_EXTENSION, 0 }, |
474 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
475 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
476 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
477 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
478 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
479 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
480 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
481 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
482 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
23407dc9 | 483 | { "__imag", RID_IMAGPART, 0 }, |
484 | { "__imag__", RID_IMAGPART, 0 }, | |
485 | { "__inline", RID_INLINE, 0 }, | |
486 | { "__inline__", RID_INLINE, 0 }, | |
5c6e5756 | 487 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, |
488 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
489 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
5c6e5756 | 490 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, |
491 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
aa4313eb | 492 | { "__is_final", RID_IS_FINAL, D_CXXONLY }, |
23407dc9 | 493 | { "__is_literal_type", RID_IS_LITERAL_TYPE, D_CXXONLY }, |
5c6e5756 | 494 | { "__is_pod", RID_IS_POD, D_CXXONLY }, |
495 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
c1c67b4f | 496 | { "__is_standard_layout", RID_IS_STD_LAYOUT, D_CXXONLY }, |
497 | { "__is_trivial", RID_IS_TRIVIAL, D_CXXONLY }, | |
f76a9aa8 | 498 | { "__is_trivially_assignable", RID_IS_TRIVIALLY_ASSIGNABLE, D_CXXONLY }, |
499 | { "__is_trivially_constructible", RID_IS_TRIVIALLY_CONSTRUCTIBLE, D_CXXONLY }, | |
717e52f9 | 500 | { "__is_trivially_copyable", RID_IS_TRIVIALLY_COPYABLE, D_CXXONLY }, |
5c6e5756 | 501 | { "__is_union", RID_IS_UNION, D_CXXONLY }, |
5c6e5756 | 502 | { "__label__", RID_LABEL, 0 }, |
503 | { "__null", RID_NULL, 0 }, | |
504 | { "__real", RID_REALPART, 0 }, | |
505 | { "__real__", RID_REALPART, 0 }, | |
506 | { "__restrict", RID_RESTRICT, 0 }, | |
507 | { "__restrict__", RID_RESTRICT, 0 }, | |
508 | { "__signed", RID_SIGNED, 0 }, | |
509 | { "__signed__", RID_SIGNED, 0 }, | |
510 | { "__thread", RID_THREAD, 0 }, | |
4c0315d0 | 511 | { "__transaction_atomic", RID_TRANSACTION_ATOMIC, 0 }, |
512 | { "__transaction_relaxed", RID_TRANSACTION_RELAXED, 0 }, | |
513 | { "__transaction_cancel", RID_TRANSACTION_CANCEL, 0 }, | |
5c6e5756 | 514 | { "__typeof", RID_TYPEOF, 0 }, |
515 | { "__typeof__", RID_TYPEOF, 0 }, | |
23407dc9 | 516 | { "__underlying_type", RID_UNDERLYING_TYPE, D_CXXONLY }, |
5c6e5756 | 517 | { "__volatile", RID_VOLATILE, 0 }, |
518 | { "__volatile__", RID_VOLATILE, 0 }, | |
ffcdbf9c | 519 | { "alignas", RID_ALIGNAS, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
e463efd7 | 520 | { "alignof", RID_ALIGNOF, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 521 | { "asm", RID_ASM, D_ASM }, |
522 | { "auto", RID_AUTO, 0 }, | |
dbd982c9 | 523 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 524 | { "break", RID_BREAK, 0 }, |
525 | { "case", RID_CASE, 0 }, | |
51030405 | 526 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
5c6e5756 | 527 | { "char", RID_CHAR, 0 }, |
51030405 | 528 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
529 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
530 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 531 | { "const", RID_CONST, 0 }, |
17814aca | 532 | { "constexpr", RID_CONSTEXPR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 533 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, |
534 | { "continue", RID_CONTINUE, 0 }, | |
51030405 | 535 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 536 | { "default", RID_DEFAULT, 0 }, |
51030405 | 537 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 538 | { "do", RID_DO, 0 }, |
539 | { "double", RID_DOUBLE, 0 }, | |
540 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
541 | { "else", RID_ELSE, 0 }, | |
542 | { "enum", RID_ENUM, 0 }, | |
51030405 | 543 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
544 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 545 | { "extern", RID_EXTERN, 0 }, |
51030405 | 546 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 547 | { "float", RID_FLOAT, 0 }, |
548 | { "for", RID_FOR, 0 }, | |
51030405 | 549 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 550 | { "goto", RID_GOTO, 0 }, |
551 | { "if", RID_IF, 0 }, | |
552 | { "inline", RID_INLINE, D_EXT89 }, | |
553 | { "int", RID_INT, 0 }, | |
554 | { "long", RID_LONG, 0 }, | |
555 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
51030405 | 556 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
557 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
98fe9664 | 558 | { "noexcept", RID_NOEXCEPT, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
6fe11077 | 559 | { "nullptr", RID_NULLPTR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
51030405 | 560 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, |
561 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
562 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
563 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 564 | { "register", RID_REGISTER, 0 }, |
565 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
566 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
567 | { "return", RID_RETURN, 0 }, | |
568 | { "short", RID_SHORT, 0 }, | |
569 | { "signed", RID_SIGNED, 0 }, | |
570 | { "sizeof", RID_SIZEOF, 0 }, | |
571 | { "static", RID_STATIC, 0 }, | |
572 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
573 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, | |
574 | { "struct", RID_STRUCT, 0 }, | |
575 | { "switch", RID_SWITCH, 0 }, | |
51030405 | 576 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
577 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
3740094c | 578 | { "thread_local", RID_THREAD, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
51030405 | 579 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, |
580 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
581 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 582 | { "typedef", RID_TYPEDEF, 0 }, |
51030405 | 583 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
584 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 585 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
586 | { "union", RID_UNION, 0 }, | |
587 | { "unsigned", RID_UNSIGNED, 0 }, | |
51030405 | 588 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
589 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 590 | { "void", RID_VOID, 0 }, |
591 | { "volatile", RID_VOLATILE, 0 }, | |
592 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
593 | { "while", RID_WHILE, 0 }, | |
594 | /* These Objective-C keywords are recognized only immediately after | |
595 | an '@'. */ | |
596 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
597 | { "defs", RID_AT_DEFS, D_OBJC }, | |
598 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
599 | { "end", RID_AT_END, D_OBJC }, | |
600 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
601 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
602 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
603 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
604 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
605 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
069761fb | 606 | { "optional", RID_AT_OPTIONAL, D_OBJC }, |
607 | { "required", RID_AT_REQUIRED, D_OBJC }, | |
86c110ac | 608 | { "property", RID_AT_PROPERTY, D_OBJC }, |
4a8875ed | 609 | { "package", RID_AT_PACKAGE, D_OBJC }, |
e1f293c0 | 610 | { "synthesize", RID_AT_SYNTHESIZE, D_OBJC }, |
611 | { "dynamic", RID_AT_DYNAMIC, D_OBJC }, | |
5c6e5756 | 612 | /* These are recognized only in protocol-qualifier context |
613 | (see above) */ | |
614 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
615 | { "byref", RID_BYREF, D_OBJC }, | |
616 | { "in", RID_IN, D_OBJC }, | |
617 | { "inout", RID_INOUT, D_OBJC }, | |
618 | { "oneway", RID_ONEWAY, D_OBJC }, | |
619 | { "out", RID_OUT, D_OBJC }, | |
86c110ac | 620 | /* These are recognized inside a property attribute list */ |
7590f0e5 | 621 | { "assign", RID_ASSIGN, D_OBJC }, |
622 | { "copy", RID_COPY, D_OBJC }, | |
86c110ac | 623 | { "getter", RID_GETTER, D_OBJC }, |
7590f0e5 | 624 | { "nonatomic", RID_NONATOMIC, D_OBJC }, |
625 | { "readonly", RID_READONLY, D_OBJC }, | |
626 | { "readwrite", RID_READWRITE, D_OBJC }, | |
627 | { "retain", RID_RETAIN, D_OBJC }, | |
86c110ac | 628 | { "setter", RID_SETTER, D_OBJC }, |
5c6e5756 | 629 | }; |
630 | ||
631 | const unsigned int num_c_common_reswords = | |
632 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
633 | ||
058a1b7a | 634 | /* Table of machine-independent attributes common to all C-like languages. |
635 | ||
636 | All attributes referencing arguments should be additionally processed | |
637 | in chkp_copy_function_type_adding_bounds for correct instrumentation | |
638 | by Pointer Bounds Checker. | |
639 | Current list of processed common attributes: nonnull. */ | |
f8e93a2e | 640 | const struct attribute_spec c_common_attribute_table[] = |
641 | { | |
ac86af5d | 642 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
643 | affects_type_identity } */ | |
f8e93a2e | 644 | { "packed", 0, 0, false, false, false, |
ac86af5d | 645 | handle_packed_attribute , false}, |
f8e93a2e | 646 | { "nocommon", 0, 0, true, false, false, |
ac86af5d | 647 | handle_nocommon_attribute, false}, |
f8e93a2e | 648 | { "common", 0, 0, true, false, false, |
ac86af5d | 649 | handle_common_attribute, false }, |
f8e93a2e | 650 | /* FIXME: logically, noreturn attributes should be listed as |
651 | "false, true, true" and apply to function types. But implementing this | |
652 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
653 | on a decl to identify non-returning functions to be located and fixed | |
654 | to check the function type instead. */ | |
655 | { "noreturn", 0, 0, true, false, false, | |
ac86af5d | 656 | handle_noreturn_attribute, false }, |
f8e93a2e | 657 | { "volatile", 0, 0, true, false, false, |
ac86af5d | 658 | handle_noreturn_attribute, false }, |
947aa916 | 659 | { "stack_protect", 0, 0, true, false, false, |
660 | handle_stack_protect_attribute, false }, | |
f8e93a2e | 661 | { "noinline", 0, 0, true, false, false, |
ac86af5d | 662 | handle_noinline_attribute, false }, |
bdb1f0d1 | 663 | { "noclone", 0, 0, true, false, false, |
ac86af5d | 664 | handle_noclone_attribute, false }, |
85fbea97 | 665 | { "no_icf", 0, 0, true, false, false, |
666 | handle_noicf_attribute, false }, | |
7bd95dfd | 667 | { "leaf", 0, 0, true, false, false, |
ac86af5d | 668 | handle_leaf_attribute, false }, |
f8e93a2e | 669 | { "always_inline", 0, 0, true, false, false, |
ac86af5d | 670 | handle_always_inline_attribute, false }, |
541e4101 | 671 | { "gnu_inline", 0, 0, true, false, false, |
ac86af5d | 672 | handle_gnu_inline_attribute, false }, |
1b16fc45 | 673 | { "artificial", 0, 0, true, false, false, |
ac86af5d | 674 | handle_artificial_attribute, false }, |
0cdd9887 | 675 | { "flatten", 0, 0, true, false, false, |
ac86af5d | 676 | handle_flatten_attribute, false }, |
f8e93a2e | 677 | { "used", 0, 0, true, false, false, |
ac86af5d | 678 | handle_used_attribute, false }, |
f8e93a2e | 679 | { "unused", 0, 0, false, false, false, |
ac86af5d | 680 | handle_unused_attribute, false }, |
62eec3b4 | 681 | { "externally_visible", 0, 0, true, false, false, |
ac86af5d | 682 | handle_externally_visible_attribute, false }, |
6b722052 | 683 | { "no_reorder", 0, 0, true, false, false, |
684 | handle_no_reorder_attribute, false }, | |
f8e93a2e | 685 | /* The same comments as for noreturn attributes apply to const ones. */ |
686 | { "const", 0, 0, true, false, false, | |
ac86af5d | 687 | handle_const_attribute, false }, |
f8e93a2e | 688 | { "transparent_union", 0, 0, false, false, false, |
ac86af5d | 689 | handle_transparent_union_attribute, false }, |
9af7fd5b | 690 | { "constructor", 0, 1, true, false, false, |
ac86af5d | 691 | handle_constructor_attribute, false }, |
9af7fd5b | 692 | { "destructor", 0, 1, true, false, false, |
ac86af5d | 693 | handle_destructor_attribute, false }, |
f8e93a2e | 694 | { "mode", 1, 1, false, true, false, |
ac86af5d | 695 | handle_mode_attribute, false }, |
f8e93a2e | 696 | { "section", 1, 1, true, false, false, |
ac86af5d | 697 | handle_section_attribute, false }, |
f8e93a2e | 698 | { "aligned", 0, 1, false, false, false, |
ac86af5d | 699 | handle_aligned_attribute, false }, |
f8e93a2e | 700 | { "weak", 0, 0, true, false, false, |
ac86af5d | 701 | handle_weak_attribute, false }, |
4641882f | 702 | { "noplt", 0, 0, true, false, false, |
703 | handle_noplt_attribute, false }, | |
85c0a25c | 704 | { "ifunc", 1, 1, true, false, false, |
ac86af5d | 705 | handle_ifunc_attribute, false }, |
f8e93a2e | 706 | { "alias", 1, 1, true, false, false, |
ac86af5d | 707 | handle_alias_attribute, false }, |
f4a30bd7 | 708 | { "weakref", 0, 1, true, false, false, |
ac86af5d | 709 | handle_weakref_attribute, false }, |
f8e93a2e | 710 | { "no_instrument_function", 0, 0, true, false, false, |
ac86af5d | 711 | handle_no_instrument_function_attribute, |
712 | false }, | |
f8e93a2e | 713 | { "malloc", 0, 0, true, false, false, |
ac86af5d | 714 | handle_malloc_attribute, false }, |
26d1c5ff | 715 | { "returns_twice", 0, 0, true, false, false, |
ac86af5d | 716 | handle_returns_twice_attribute, false }, |
f8e93a2e | 717 | { "no_stack_limit", 0, 0, true, false, false, |
ac86af5d | 718 | handle_no_limit_stack_attribute, false }, |
f8e93a2e | 719 | { "pure", 0, 0, true, false, false, |
ac86af5d | 720 | handle_pure_attribute, false }, |
4c0315d0 | 721 | { "transaction_callable", 0, 0, false, true, false, |
722 | handle_tm_attribute, false }, | |
723 | { "transaction_unsafe", 0, 0, false, true, false, | |
724 | handle_tm_attribute, false }, | |
725 | { "transaction_safe", 0, 0, false, true, false, | |
726 | handle_tm_attribute, false }, | |
727 | { "transaction_may_cancel_outer", 0, 0, false, true, false, | |
728 | handle_tm_attribute, false }, | |
729 | /* ??? These two attributes didn't make the transition from the | |
730 | Intel language document to the multi-vendor language document. */ | |
731 | { "transaction_pure", 0, 0, false, true, false, | |
732 | handle_tm_attribute, false }, | |
733 | { "transaction_wrap", 1, 1, true, false, false, | |
734 | handle_tm_wrap_attribute, false }, | |
fc09b200 | 735 | /* For internal use (marking of builtins) only. The name contains space |
736 | to prevent its usage in source code. */ | |
737 | { "no vops", 0, 0, true, false, false, | |
ac86af5d | 738 | handle_novops_attribute, false }, |
45c4e798 | 739 | { "deprecated", 0, 1, false, false, false, |
ac86af5d | 740 | handle_deprecated_attribute, false }, |
f8e93a2e | 741 | { "vector_size", 1, 1, false, true, false, |
ac86af5d | 742 | handle_vector_size_attribute, false }, |
b212f378 | 743 | { "visibility", 1, 1, false, false, false, |
ac86af5d | 744 | handle_visibility_attribute, false }, |
24dfead4 | 745 | { "tls_model", 1, 1, true, false, false, |
ac86af5d | 746 | handle_tls_model_attribute, false }, |
dbf6c367 | 747 | { "nonnull", 0, -1, false, true, true, |
ac86af5d | 748 | handle_nonnull_attribute, false }, |
fa987697 | 749 | { "nothrow", 0, 0, true, false, false, |
ac86af5d | 750 | handle_nothrow_attribute, false }, |
751 | { "may_alias", 0, 0, false, true, false, NULL, false }, | |
7acb29a3 | 752 | { "cleanup", 1, 1, true, false, false, |
ac86af5d | 753 | handle_cleanup_attribute, false }, |
8a8cdb8d | 754 | { "warn_unused_result", 0, 0, false, true, true, |
ac86af5d | 755 | handle_warn_unused_result_attribute, false }, |
50ca527f | 756 | { "sentinel", 0, 1, false, true, true, |
ac86af5d | 757 | handle_sentinel_attribute, false }, |
b5c26b42 | 758 | /* For internal use (marking of builtins) only. The name contains space |
759 | to prevent its usage in source code. */ | |
760 | { "type generic", 0, 0, false, true, true, | |
ac86af5d | 761 | handle_type_generic_attribute, false }, |
4a29c97c | 762 | { "alloc_size", 1, 2, false, true, true, |
ac86af5d | 763 | handle_alloc_size_attribute, false }, |
5de92639 | 764 | { "cold", 0, 0, true, false, false, |
ac86af5d | 765 | handle_cold_attribute, false }, |
5de92639 | 766 | { "hot", 0, 0, true, false, false, |
ac86af5d | 767 | handle_hot_attribute, false }, |
d413ffdd | 768 | { "no_address_safety_analysis", |
769 | 0, 0, true, false, false, | |
770 | handle_no_address_safety_analysis_attribute, | |
771 | false }, | |
a9196da9 | 772 | { "no_sanitize_address", 0, 0, true, false, false, |
773 | handle_no_sanitize_address_attribute, | |
774 | false }, | |
d1e96383 | 775 | { "no_sanitize_thread", 0, 0, true, false, false, |
776 | handle_no_sanitize_address_attribute, | |
777 | false }, | |
05f893e1 | 778 | { "no_sanitize_undefined", 0, 0, true, false, false, |
779 | handle_no_sanitize_undefined_attribute, | |
780 | false }, | |
10fc867f | 781 | { "warning", 1, 1, true, false, false, |
ac86af5d | 782 | handle_error_attribute, false }, |
10fc867f | 783 | { "error", 1, 1, true, false, false, |
ac86af5d | 784 | handle_error_attribute, false }, |
24470055 | 785 | { "target", 1, -1, true, false, false, |
ac86af5d | 786 | handle_target_attribute, false }, |
46f8e3b0 | 787 | { "optimize", 1, -1, true, false, false, |
ac86af5d | 788 | handle_optimize_attribute, false }, |
4c0315d0 | 789 | /* For internal use only. The leading '*' both prevents its usage in |
790 | source code and signals that it may be overridden by machine tables. */ | |
791 | { "*tm regparm", 0, 0, false, true, true, | |
792 | ignore_attribute, false }, | |
48b14f50 | 793 | { "no_split_stack", 0, 0, true, false, false, |
ac86af5d | 794 | handle_no_split_stack_attribute, false }, |
8ce86007 | 795 | /* For internal use (marking of builtins and runtime functions) only. |
796 | The name contains space to prevent its usage in source code. */ | |
797 | { "fn spec", 1, 1, false, true, true, | |
ac86af5d | 798 | handle_fnspec_attribute, false }, |
a96c3cc1 | 799 | { "warn_unused", 0, 0, false, false, false, |
800 | handle_warn_unused_attribute, false }, | |
d7dcba40 | 801 | { "returns_nonnull", 0, 0, false, true, true, |
802 | handle_returns_nonnull_attribute, false }, | |
bc7bff74 | 803 | { "omp declare simd", 0, -1, true, false, false, |
804 | handle_omp_declare_simd_attribute, false }, | |
74acc703 | 805 | { "cilk simd function", 0, -1, true, false, false, |
806 | handle_omp_declare_simd_attribute, false }, | |
bc7bff74 | 807 | { "omp declare target", 0, 0, true, false, false, |
808 | handle_omp_declare_target_attribute, false }, | |
237e78b1 | 809 | { "alloc_align", 1, 1, false, true, true, |
810 | handle_alloc_align_attribute, false }, | |
811 | { "assume_aligned", 1, 2, false, true, true, | |
812 | handle_assume_aligned_attribute, false }, | |
74691f46 | 813 | { "designated_init", 0, 0, false, true, false, |
814 | handle_designated_init_attribute, false }, | |
058a1b7a | 815 | { "bnd_variable_size", 0, 0, true, false, false, |
816 | handle_bnd_variable_size_attribute, false }, | |
817 | { "bnd_legacy", 0, 0, true, false, false, | |
818 | handle_bnd_legacy, false }, | |
819 | { "bnd_instrument", 0, 0, true, false, false, | |
820 | handle_bnd_instrument, false }, | |
ac86af5d | 821 | { NULL, 0, 0, false, false, false, NULL, false } |
f8e93a2e | 822 | }; |
823 | ||
824 | /* Give the specifications for the format attributes, used by C and all | |
058a1b7a | 825 | descendants. |
f8e93a2e | 826 | |
058a1b7a | 827 | All attributes referencing arguments should be additionally processed |
828 | in chkp_copy_function_type_adding_bounds for correct instrumentation | |
829 | by Pointer Bounds Checker. | |
830 | Current list of processed format attributes: format, format_arg. */ | |
f8e93a2e | 831 | const struct attribute_spec c_common_format_attribute_table[] = |
832 | { | |
ac86af5d | 833 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
834 | affects_type_identity } */ | |
f8e93a2e | 835 | { "format", 3, 3, false, true, true, |
ac86af5d | 836 | handle_format_attribute, false }, |
f8e93a2e | 837 | { "format_arg", 1, 1, false, true, true, |
ac86af5d | 838 | handle_format_arg_attribute, false }, |
839 | { NULL, 0, 0, false, false, false, NULL, false } | |
f8e93a2e | 840 | }; |
841 | ||
6d5d708e | 842 | /* Return identifier for address space AS. */ |
34208e18 | 843 | |
6d5d708e | 844 | const char * |
845 | c_addr_space_name (addr_space_t as) | |
846 | { | |
34208e18 | 847 | int rid = RID_FIRST_ADDR_SPACE + as; |
848 | gcc_assert (ridpointers [rid]); | |
849 | return IDENTIFIER_POINTER (ridpointers [rid]); | |
6d5d708e | 850 | } |
851 | ||
2c0e001b | 852 | /* Push current bindings for the function name VAR_DECLS. */ |
f4e3c278 | 853 | |
854 | void | |
1cae46be | 855 | start_fname_decls (void) |
f4e3c278 | 856 | { |
65b7f83f | 857 | unsigned ix; |
858 | tree saved = NULL_TREE; | |
1cae46be | 859 | |
65b7f83f | 860 | for (ix = 0; fname_vars[ix].decl; ix++) |
861 | { | |
862 | tree decl = *fname_vars[ix].decl; | |
f4e3c278 | 863 | |
65b7f83f | 864 | if (decl) |
865 | { | |
ceb7b692 | 866 | saved = tree_cons (decl, build_int_cst (integer_type_node, ix), |
867 | saved); | |
65b7f83f | 868 | *fname_vars[ix].decl = NULL_TREE; |
869 | } | |
870 | } | |
871 | if (saved || saved_function_name_decls) | |
872 | /* Normally they'll have been NULL, so only push if we've got a | |
873 | stack, or they are non-NULL. */ | |
874 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
875 | saved_function_name_decls); | |
876 | } | |
877 | ||
2363ef00 | 878 | /* Finish up the current bindings, adding them into the current function's |
879 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
880 | If there is no current function, we must be at file scope and no statements | |
881 | are involved. Pop the previous bindings. */ | |
65b7f83f | 882 | |
883 | void | |
1cae46be | 884 | finish_fname_decls (void) |
65b7f83f | 885 | { |
886 | unsigned ix; | |
2363ef00 | 887 | tree stmts = NULL_TREE; |
65b7f83f | 888 | tree stack = saved_function_name_decls; |
889 | ||
890 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
2363ef00 | 891 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
1cae46be | 892 | |
2363ef00 | 893 | if (stmts) |
65b7f83f | 894 | { |
2363ef00 | 895 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
5c423bd6 | 896 | |
2363ef00 | 897 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
898 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
81010c97 | 899 | |
bc2b76e0 | 900 | append_to_statement_list_force (*bodyp, &stmts); |
2363ef00 | 901 | *bodyp = stmts; |
65b7f83f | 902 | } |
1cae46be | 903 | |
65b7f83f | 904 | for (ix = 0; fname_vars[ix].decl; ix++) |
905 | *fname_vars[ix].decl = NULL_TREE; | |
1cae46be | 906 | |
65b7f83f | 907 | if (stack) |
f4e3c278 | 908 | { |
2c0e001b | 909 | /* We had saved values, restore them. */ |
65b7f83f | 910 | tree saved; |
911 | ||
912 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
913 | { | |
914 | tree decl = TREE_PURPOSE (saved); | |
f9ae6f95 | 915 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); |
1cae46be | 916 | |
65b7f83f | 917 | *fname_vars[ix].decl = decl; |
918 | } | |
919 | stack = TREE_CHAIN (stack); | |
f4e3c278 | 920 | } |
65b7f83f | 921 | saved_function_name_decls = stack; |
922 | } | |
923 | ||
81010c97 | 924 | /* Return the text name of the current function, suitably prettified |
5fc7fa69 | 925 | by PRETTY_P. Return string must be freed by caller. */ |
65b7f83f | 926 | |
927 | const char * | |
1cae46be | 928 | fname_as_string (int pretty_p) |
65b7f83f | 929 | { |
9ad4bb1e | 930 | const char *name = "top level"; |
5fc7fa69 | 931 | char *namep; |
8115b8be | 932 | int vrb = 2, len; |
933 | cpp_string cstr = { 0, 0 }, strname; | |
9ad4bb1e | 934 | |
84166705 | 935 | if (!pretty_p) |
9ad4bb1e | 936 | { |
937 | name = ""; | |
938 | vrb = 0; | |
939 | } | |
940 | ||
941 | if (current_function_decl) | |
dc24ddbd | 942 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
9ad4bb1e | 943 | |
8115b8be | 944 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
5fc7fa69 | 945 | |
8115b8be | 946 | namep = XNEWVEC (char, len); |
947 | snprintf (namep, len, "\"%s\"", name); | |
948 | strname.text = (unsigned char *) namep; | |
949 | strname.len = len - 1; | |
5fc7fa69 | 950 | |
924bbf02 | 951 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
8115b8be | 952 | { |
953 | XDELETEVEC (namep); | |
954 | return (const char *) cstr.text; | |
5fc7fa69 | 955 | } |
5fc7fa69 | 956 | |
957 | return namep; | |
65b7f83f | 958 | } |
959 | ||
65b7f83f | 960 | /* Return the VAR_DECL for a const char array naming the current |
961 | function. If the VAR_DECL has not yet been created, create it | |
962 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
963 | ID is its name (unfortunately C and C++ hold the RID values of | |
964 | keywords in different places, so we can't derive RID from ID in | |
e3b80d49 | 965 | this language independent code. LOC is the location of the |
966 | function. */ | |
65b7f83f | 967 | |
968 | tree | |
e3b80d49 | 969 | fname_decl (location_t loc, unsigned int rid, tree id) |
65b7f83f | 970 | { |
971 | unsigned ix; | |
972 | tree decl = NULL_TREE; | |
973 | ||
974 | for (ix = 0; fname_vars[ix].decl; ix++) | |
975 | if (fname_vars[ix].rid == rid) | |
976 | break; | |
977 | ||
978 | decl = *fname_vars[ix].decl; | |
979 | if (!decl) | |
f4e3c278 | 980 | { |
2222b3c6 | 981 | /* If a tree is built here, it would normally have the lineno of |
982 | the current statement. Later this tree will be moved to the | |
983 | beginning of the function and this line number will be wrong. | |
984 | To avoid this problem set the lineno to 0 here; that prevents | |
7299020b | 985 | it from appearing in the RTL. */ |
2363ef00 | 986 | tree stmts; |
9a6486a6 | 987 | location_t saved_location = input_location; |
9a6486a6 | 988 | input_location = UNKNOWN_LOCATION; |
1cae46be | 989 | |
2363ef00 | 990 | stmts = push_stmt_list (); |
e60a6f7b | 991 | decl = (*make_fname_decl) (loc, id, fname_vars[ix].pretty); |
2363ef00 | 992 | stmts = pop_stmt_list (stmts); |
993 | if (!IS_EMPTY_STMT (stmts)) | |
994 | saved_function_name_decls | |
995 | = tree_cons (decl, stmts, saved_function_name_decls); | |
65b7f83f | 996 | *fname_vars[ix].decl = decl; |
9a6486a6 | 997 | input_location = saved_location; |
f4e3c278 | 998 | } |
65b7f83f | 999 | if (!ix && !current_function_decl) |
e3b80d49 | 1000 | pedwarn (loc, 0, "%qD is not defined outside of function scope", decl); |
81010c97 | 1001 | |
65b7f83f | 1002 | return decl; |
f4e3c278 | 1003 | } |
1004 | ||
070236f0 | 1005 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b0fc3e72 | 1006 | |
1007 | tree | |
1cae46be | 1008 | fix_string_type (tree value) |
b0fc3e72 | 1009 | { |
070236f0 | 1010 | int length = TREE_STRING_LENGTH (value); |
1011 | int nchars; | |
00d26680 | 1012 | tree e_type, i_type, a_type; |
1013 | ||
73be5127 | 1014 | /* Compute the number of elements, for the array type. */ |
924bbf02 | 1015 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
1016 | { | |
1017 | nchars = length; | |
1018 | e_type = char_type_node; | |
1019 | } | |
1020 | else if (TREE_TYPE (value) == char16_array_type_node) | |
1021 | { | |
1022 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
1023 | e_type = char16_type_node; | |
1024 | } | |
1025 | else if (TREE_TYPE (value) == char32_array_type_node) | |
1026 | { | |
1027 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
1028 | e_type = char32_type_node; | |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
1033 | e_type = wchar_type_node; | |
1034 | } | |
b0fc3e72 | 1035 | |
1d752508 | 1036 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
1037 | limit in C++98 Annex B is very large (65536) and is not normative, | |
1038 | so we do not diagnose it (warn_overlength_strings is forced off | |
1039 | in c_common_post_options). */ | |
1040 | if (warn_overlength_strings) | |
1041 | { | |
1042 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
1043 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
1044 | if (nchars - 1 > nchars_max) | |
1045 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
1046 | separate the %d from the 'C'. 'ISO' should not be | |
1047 | translated, but it may be moved after 'C%d' in languages | |
1048 | where modifiers follow nouns. */ | |
21ca8540 | 1049 | pedwarn (input_location, OPT_Woverlength_strings, |
8864917d | 1050 | "string length %qd is greater than the length %qd " |
1d752508 | 1051 | "ISO C%d compilers are required to support", |
1052 | nchars - 1, nchars_max, relevant_std); | |
1053 | } | |
82cfc7f7 | 1054 | |
390be14e | 1055 | /* Create the array type for the string constant. The ISO C++ |
1056 | standard says that a string literal has type `const char[N]' or | |
1057 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
1058 | front-end with -Wwrite-strings. | |
1059 | ??? We should change the type of an expression depending on the | |
1060 | state of a warning flag. We should just be warning -- see how | |
1061 | this is handled in the C++ front-end for the deprecated implicit | |
1062 | conversion from string literals to `char*' or `wchar_t*'. | |
00d26680 | 1063 | |
1064 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
1065 | array type being the unqualified version of that type. | |
1066 | Therefore, if we are constructing an array of const char, we must | |
1067 | construct the matching unqualified array type first. The C front | |
1068 | end does not require this, but it does no harm, so we do it | |
1069 | unconditionally. */ | |
ceb7b692 | 1070 | i_type = build_index_type (size_int (nchars - 1)); |
00d26680 | 1071 | a_type = build_array_type (e_type, i_type); |
390be14e | 1072 | if (c_dialect_cxx() || warn_write_strings) |
aebc8537 | 1073 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
3a10ba35 | 1074 | |
00d26680 | 1075 | TREE_TYPE (value) = a_type; |
b8e3b7ad | 1076 | TREE_CONSTANT (value) = 1; |
a814bad5 | 1077 | TREE_READONLY (value) = 1; |
b0fc3e72 | 1078 | TREE_STATIC (value) = 1; |
1079 | return value; | |
1080 | } | |
1081 | \f | |
fc501191 | 1082 | /* If DISABLE is true, stop issuing warnings. This is used when |
1083 | parsing code that we know will not be executed. This function may | |
1084 | be called multiple times, and works as a stack. */ | |
1085 | ||
1086 | static void | |
1087 | c_disable_warnings (bool disable) | |
1088 | { | |
1089 | if (disable) | |
1090 | { | |
1091 | ++c_inhibit_evaluation_warnings; | |
1092 | fold_defer_overflow_warnings (); | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | /* If ENABLE is true, reenable issuing warnings. */ | |
1097 | ||
1098 | static void | |
1099 | c_enable_warnings (bool enable) | |
1100 | { | |
1101 | if (enable) | |
1102 | { | |
1103 | --c_inhibit_evaluation_warnings; | |
1104 | fold_undefer_and_ignore_overflow_warnings (); | |
1105 | } | |
1106 | } | |
1107 | ||
a75b1c71 | 1108 | /* Fully fold EXPR, an expression that was not folded (beyond integer |
1109 | constant expressions and null pointer constants) when being built | |
1110 | up. If IN_INIT, this is in a static initializer and certain | |
1111 | changes are made to the folding done. Clear *MAYBE_CONST if | |
1112 | MAYBE_CONST is not NULL and EXPR is definitely not a constant | |
1113 | expression because it contains an evaluated operator (in C99) or an | |
1114 | operator outside of sizeof returning an integer constant (in C90) | |
1115 | not permitted in constant expressions, or because it contains an | |
1116 | evaluated arithmetic overflow. (*MAYBE_CONST should typically be | |
1117 | set to true by callers before calling this function.) Return the | |
1118 | folded expression. Function arguments have already been folded | |
1119 | before calling this function, as have the contents of SAVE_EXPR, | |
1120 | TARGET_EXPR, BIND_EXPR, VA_ARG_EXPR, OBJ_TYPE_REF and | |
1121 | C_MAYBE_CONST_EXPR. */ | |
1122 | ||
1123 | tree | |
1124 | c_fully_fold (tree expr, bool in_init, bool *maybe_const) | |
1125 | { | |
1126 | tree ret; | |
c6418a4e | 1127 | tree eptype = NULL_TREE; |
a75b1c71 | 1128 | bool dummy = true; |
1129 | bool maybe_const_itself = true; | |
389dd41b | 1130 | location_t loc = EXPR_LOCATION (expr); |
a75b1c71 | 1131 | |
1132 | /* This function is not relevant to C++ because C++ folds while | |
1133 | parsing, and may need changes to be correct for C++ when C++ | |
1134 | stops folding while parsing. */ | |
1135 | if (c_dialect_cxx ()) | |
1136 | gcc_unreachable (); | |
1137 | ||
1138 | if (!maybe_const) | |
1139 | maybe_const = &dummy; | |
c6418a4e | 1140 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) |
1141 | { | |
1142 | eptype = TREE_TYPE (expr); | |
1143 | expr = TREE_OPERAND (expr, 0); | |
1144 | } | |
a75b1c71 | 1145 | ret = c_fully_fold_internal (expr, in_init, maybe_const, |
aac24642 | 1146 | &maybe_const_itself, false); |
c6418a4e | 1147 | if (eptype) |
389dd41b | 1148 | ret = fold_convert_loc (loc, eptype, ret); |
a75b1c71 | 1149 | *maybe_const &= maybe_const_itself; |
1150 | return ret; | |
1151 | } | |
1152 | ||
1153 | /* Internal helper for c_fully_fold. EXPR and IN_INIT are as for | |
1154 | c_fully_fold. *MAYBE_CONST_OPERANDS is cleared because of operands | |
1155 | not permitted, while *MAYBE_CONST_ITSELF is cleared because of | |
1156 | arithmetic overflow (for C90, *MAYBE_CONST_OPERANDS is carried from | |
1157 | both evaluated and unevaluated subexpressions while | |
1158 | *MAYBE_CONST_ITSELF is carried from only evaluated | |
aac24642 | 1159 | subexpressions). FOR_INT_CONST indicates if EXPR is an expression |
1160 | with integer constant operands, and if any of the operands doesn't | |
1161 | get folded to an integer constant, don't fold the expression itself. */ | |
a75b1c71 | 1162 | |
1163 | static tree | |
1164 | c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands, | |
aac24642 | 1165 | bool *maybe_const_itself, bool for_int_const) |
a75b1c71 | 1166 | { |
1167 | tree ret = expr; | |
1168 | enum tree_code code = TREE_CODE (expr); | |
1169 | enum tree_code_class kind = TREE_CODE_CLASS (code); | |
1170 | location_t loc = EXPR_LOCATION (expr); | |
1171 | tree op0, op1, op2, op3; | |
1172 | tree orig_op0, orig_op1, orig_op2; | |
1173 | bool op0_const = true, op1_const = true, op2_const = true; | |
1174 | bool op0_const_self = true, op1_const_self = true, op2_const_self = true; | |
1175 | bool nowarning = TREE_NO_WARNING (expr); | |
fc501191 | 1176 | bool unused_p; |
a75b1c71 | 1177 | |
1178 | /* This function is not relevant to C++ because C++ folds while | |
1179 | parsing, and may need changes to be correct for C++ when C++ | |
1180 | stops folding while parsing. */ | |
1181 | if (c_dialect_cxx ()) | |
1182 | gcc_unreachable (); | |
1183 | ||
1184 | /* Constants, declarations, statements, errors, SAVE_EXPRs and | |
1185 | anything else not counted as an expression cannot usefully be | |
1186 | folded further at this point. */ | |
1187 | if (!IS_EXPR_CODE_CLASS (kind) | |
1188 | || kind == tcc_statement | |
1189 | || code == SAVE_EXPR) | |
1190 | return expr; | |
1191 | ||
1192 | /* Operands of variable-length expressions (function calls) have | |
1193 | already been folded, as have __builtin_* function calls, and such | |
1194 | expressions cannot occur in constant expressions. */ | |
1195 | if (kind == tcc_vl_exp) | |
1196 | { | |
1197 | *maybe_const_operands = false; | |
1198 | ret = fold (expr); | |
1199 | goto out; | |
1200 | } | |
1201 | ||
1202 | if (code == C_MAYBE_CONST_EXPR) | |
1203 | { | |
1204 | tree pre = C_MAYBE_CONST_EXPR_PRE (expr); | |
1205 | tree inner = C_MAYBE_CONST_EXPR_EXPR (expr); | |
1206 | if (C_MAYBE_CONST_EXPR_NON_CONST (expr)) | |
1207 | *maybe_const_operands = false; | |
1208 | if (C_MAYBE_CONST_EXPR_INT_OPERANDS (expr)) | |
aac24642 | 1209 | { |
1210 | *maybe_const_itself = false; | |
1211 | inner = c_fully_fold_internal (inner, in_init, maybe_const_operands, | |
1212 | maybe_const_itself, true); | |
1213 | } | |
a75b1c71 | 1214 | if (pre && !in_init) |
1215 | ret = build2 (COMPOUND_EXPR, TREE_TYPE (expr), pre, inner); | |
1216 | else | |
1217 | ret = inner; | |
1218 | goto out; | |
1219 | } | |
1220 | ||
1221 | /* Assignment, increment, decrement, function call and comma | |
1222 | operators, and statement expressions, cannot occur in constant | |
1223 | expressions if evaluated / outside of sizeof. (Function calls | |
1224 | were handled above, though VA_ARG_EXPR is treated like a function | |
1225 | call here, and statement expressions are handled through | |
1226 | C_MAYBE_CONST_EXPR to avoid folding inside them.) */ | |
1227 | switch (code) | |
1228 | { | |
1229 | case MODIFY_EXPR: | |
1230 | case PREDECREMENT_EXPR: | |
1231 | case PREINCREMENT_EXPR: | |
1232 | case POSTDECREMENT_EXPR: | |
1233 | case POSTINCREMENT_EXPR: | |
1234 | case COMPOUND_EXPR: | |
1235 | *maybe_const_operands = false; | |
1236 | break; | |
1237 | ||
1238 | case VA_ARG_EXPR: | |
1239 | case TARGET_EXPR: | |
1240 | case BIND_EXPR: | |
1241 | case OBJ_TYPE_REF: | |
1242 | *maybe_const_operands = false; | |
1243 | ret = fold (expr); | |
1244 | goto out; | |
1245 | ||
1246 | default: | |
1247 | break; | |
1248 | } | |
1249 | ||
1250 | /* Fold individual tree codes as appropriate. */ | |
1251 | switch (code) | |
1252 | { | |
1253 | case COMPOUND_LITERAL_EXPR: | |
1254 | /* Any non-constancy will have been marked in a containing | |
1255 | C_MAYBE_CONST_EXPR; there is no more folding to do here. */ | |
1256 | goto out; | |
1257 | ||
1258 | case COMPONENT_REF: | |
1259 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1260 | op1 = TREE_OPERAND (expr, 1); | |
1261 | op2 = TREE_OPERAND (expr, 2); | |
1262 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
aac24642 | 1263 | maybe_const_itself, for_int_const); |
f59e3889 | 1264 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1265 | if (op0 != orig_op0) |
1266 | ret = build3 (COMPONENT_REF, TREE_TYPE (expr), op0, op1, op2); | |
1267 | if (ret != expr) | |
1268 | { | |
1269 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1270 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1271 | } | |
1272 | goto out; | |
1273 | ||
1274 | case ARRAY_REF: | |
1275 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1276 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1277 | op2 = TREE_OPERAND (expr, 2); | |
1278 | op3 = TREE_OPERAND (expr, 3); | |
1279 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
aac24642 | 1280 | maybe_const_itself, for_int_const); |
f59e3889 | 1281 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1282 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, |
aac24642 | 1283 | maybe_const_itself, for_int_const); |
f59e3889 | 1284 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1285 | op1 = decl_constant_value_for_optimization (op1); |
1286 | if (op0 != orig_op0 || op1 != orig_op1) | |
1287 | ret = build4 (ARRAY_REF, TREE_TYPE (expr), op0, op1, op2, op3); | |
1288 | if (ret != expr) | |
1289 | { | |
1290 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1291 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1292 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1293 | } | |
1294 | ret = fold (ret); | |
1295 | goto out; | |
1296 | ||
1297 | case COMPOUND_EXPR: | |
1298 | case MODIFY_EXPR: | |
1299 | case PREDECREMENT_EXPR: | |
1300 | case PREINCREMENT_EXPR: | |
1301 | case POSTDECREMENT_EXPR: | |
1302 | case POSTINCREMENT_EXPR: | |
1303 | case PLUS_EXPR: | |
1304 | case MINUS_EXPR: | |
1305 | case MULT_EXPR: | |
1306 | case POINTER_PLUS_EXPR: | |
1307 | case TRUNC_DIV_EXPR: | |
1308 | case CEIL_DIV_EXPR: | |
1309 | case FLOOR_DIV_EXPR: | |
1310 | case TRUNC_MOD_EXPR: | |
1311 | case RDIV_EXPR: | |
1312 | case EXACT_DIV_EXPR: | |
1313 | case LSHIFT_EXPR: | |
1314 | case RSHIFT_EXPR: | |
1315 | case BIT_IOR_EXPR: | |
1316 | case BIT_XOR_EXPR: | |
1317 | case BIT_AND_EXPR: | |
1318 | case LT_EXPR: | |
1319 | case LE_EXPR: | |
1320 | case GT_EXPR: | |
1321 | case GE_EXPR: | |
1322 | case EQ_EXPR: | |
1323 | case NE_EXPR: | |
1324 | case COMPLEX_EXPR: | |
1325 | case TRUTH_AND_EXPR: | |
1326 | case TRUTH_OR_EXPR: | |
1327 | case TRUTH_XOR_EXPR: | |
1328 | case UNORDERED_EXPR: | |
1329 | case ORDERED_EXPR: | |
1330 | case UNLT_EXPR: | |
1331 | case UNLE_EXPR: | |
1332 | case UNGT_EXPR: | |
1333 | case UNGE_EXPR: | |
1334 | case UNEQ_EXPR: | |
1335 | /* Binary operations evaluating both arguments (increment and | |
1336 | decrement are binary internally in GCC). */ | |
1337 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1338 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1339 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
aac24642 | 1340 | maybe_const_itself, for_int_const); |
f59e3889 | 1341 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1342 | if (code != MODIFY_EXPR |
1343 | && code != PREDECREMENT_EXPR | |
1344 | && code != PREINCREMENT_EXPR | |
1345 | && code != POSTDECREMENT_EXPR | |
1346 | && code != POSTINCREMENT_EXPR) | |
1347 | op0 = decl_constant_value_for_optimization (op0); | |
1348 | /* The RHS of a MODIFY_EXPR was fully folded when building that | |
1349 | expression for the sake of conversion warnings. */ | |
1350 | if (code != MODIFY_EXPR) | |
1351 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, | |
aac24642 | 1352 | maybe_const_itself, for_int_const); |
f59e3889 | 1353 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1354 | op1 = decl_constant_value_for_optimization (op1); |
aac24642 | 1355 | |
1356 | if (for_int_const && (TREE_CODE (op0) != INTEGER_CST | |
1357 | || TREE_CODE (op1) != INTEGER_CST)) | |
1358 | goto out; | |
1359 | ||
a75b1c71 | 1360 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1361 | ret = in_init | |
389dd41b | 1362 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1363 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1364 | else |
1365 | ret = fold (expr); | |
672d914b | 1366 | if (TREE_OVERFLOW_P (ret) |
1367 | && !TREE_OVERFLOW_P (op0) | |
1368 | && !TREE_OVERFLOW_P (op1)) | |
1369 | overflow_warning (EXPR_LOCATION (expr), ret); | |
cdc64059 | 1370 | if (code == LSHIFT_EXPR |
1371 | && TREE_CODE (orig_op0) != INTEGER_CST | |
1372 | && TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1373 | && TREE_CODE (op0) == INTEGER_CST | |
1374 | && c_inhibit_evaluation_warnings == 0 | |
1375 | && tree_int_cst_sgn (op0) < 0) | |
1376 | warning_at (loc, OPT_Wshift_negative_value, | |
1377 | "left shift of negative value"); | |
7c834436 | 1378 | if ((code == LSHIFT_EXPR || code == RSHIFT_EXPR) |
1379 | && TREE_CODE (orig_op1) != INTEGER_CST | |
1380 | && TREE_CODE (op1) == INTEGER_CST | |
1381 | && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1382 | || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE) | |
1383 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE | |
1384 | && c_inhibit_evaluation_warnings == 0) | |
1385 | { | |
1386 | if (tree_int_cst_sgn (op1) < 0) | |
f11bdffb | 1387 | warning_at (loc, OPT_Wshift_count_negative, |
1388 | (code == LSHIFT_EXPR | |
1389 | ? G_("left shift count is negative") | |
1390 | : G_("right shift count is negative"))); | |
7c834436 | 1391 | else if (compare_tree_int (op1, |
1392 | TYPE_PRECISION (TREE_TYPE (orig_op0))) | |
1393 | >= 0) | |
f11bdffb | 1394 | warning_at (loc, OPT_Wshift_count_overflow, |
1395 | (code == LSHIFT_EXPR | |
1396 | ? G_("left shift count >= width of type") | |
1397 | : G_("right shift count >= width of type"))); | |
7c834436 | 1398 | } |
b57910fa | 1399 | if ((code == TRUNC_DIV_EXPR |
1400 | || code == CEIL_DIV_EXPR | |
1401 | || code == FLOOR_DIV_EXPR | |
1402 | || code == EXACT_DIV_EXPR | |
1403 | || code == TRUNC_MOD_EXPR) | |
1404 | && TREE_CODE (orig_op1) != INTEGER_CST | |
1405 | && TREE_CODE (op1) == INTEGER_CST | |
1406 | && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1407 | || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE) | |
1408 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE) | |
1409 | warn_for_div_by_zero (loc, op1); | |
a75b1c71 | 1410 | goto out; |
1411 | ||
1412 | case INDIRECT_REF: | |
1413 | case FIX_TRUNC_EXPR: | |
1414 | case FLOAT_EXPR: | |
1415 | CASE_CONVERT: | |
e66325ea | 1416 | case ADDR_SPACE_CONVERT_EXPR: |
2b19dfe4 | 1417 | case VIEW_CONVERT_EXPR: |
a75b1c71 | 1418 | case NON_LVALUE_EXPR: |
1419 | case NEGATE_EXPR: | |
1420 | case BIT_NOT_EXPR: | |
1421 | case TRUTH_NOT_EXPR: | |
1422 | case ADDR_EXPR: | |
1423 | case CONJ_EXPR: | |
1424 | case REALPART_EXPR: | |
1425 | case IMAGPART_EXPR: | |
1426 | /* Unary operations. */ | |
1427 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1428 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
aac24642 | 1429 | maybe_const_itself, for_int_const); |
f59e3889 | 1430 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1431 | if (code != ADDR_EXPR && code != REALPART_EXPR && code != IMAGPART_EXPR) |
1432 | op0 = decl_constant_value_for_optimization (op0); | |
aac24642 | 1433 | |
1434 | if (for_int_const && TREE_CODE (op0) != INTEGER_CST) | |
1435 | goto out; | |
1436 | ||
737a23cc | 1437 | /* ??? Cope with user tricks that amount to offsetof. The middle-end is |
1438 | not prepared to deal with them if they occur in initializers. */ | |
1439 | if (op0 != orig_op0 | |
1440 | && code == ADDR_EXPR | |
1441 | && (op1 = get_base_address (op0)) != NULL_TREE | |
1442 | && TREE_CODE (op1) == INDIRECT_REF | |
1443 | && TREE_CONSTANT (TREE_OPERAND (op1, 0))) | |
7549df0d | 1444 | ret = fold_convert_loc (loc, TREE_TYPE (expr), fold_offsetof_1 (op0)); |
737a23cc | 1445 | else if (op0 != orig_op0 || in_init) |
a75b1c71 | 1446 | ret = in_init |
389dd41b | 1447 | ? fold_build1_initializer_loc (loc, code, TREE_TYPE (expr), op0) |
1448 | : fold_build1_loc (loc, code, TREE_TYPE (expr), op0); | |
a75b1c71 | 1449 | else |
1450 | ret = fold (expr); | |
1451 | if (code == INDIRECT_REF | |
1452 | && ret != expr | |
1453 | && TREE_CODE (ret) == INDIRECT_REF) | |
1454 | { | |
1455 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1456 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1457 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1458 | } | |
672d914b | 1459 | switch (code) |
1460 | { | |
1461 | case FIX_TRUNC_EXPR: | |
1462 | case FLOAT_EXPR: | |
1463 | CASE_CONVERT: | |
1464 | /* Don't warn about explicit conversions. We will already | |
1465 | have warned about suspect implicit conversions. */ | |
1466 | break; | |
1467 | ||
1468 | default: | |
1469 | if (TREE_OVERFLOW_P (ret) && !TREE_OVERFLOW_P (op0)) | |
1470 | overflow_warning (EXPR_LOCATION (expr), ret); | |
1471 | break; | |
1472 | } | |
a75b1c71 | 1473 | goto out; |
1474 | ||
1475 | case TRUTH_ANDIF_EXPR: | |
1476 | case TRUTH_ORIF_EXPR: | |
1477 | /* Binary operations not necessarily evaluating both | |
1478 | arguments. */ | |
1479 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1480 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
aac24642 | 1481 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self, |
1482 | for_int_const); | |
f59e3889 | 1483 | STRIP_TYPE_NOPS (op0); |
672d914b | 1484 | |
1485 | unused_p = (op0 == (code == TRUTH_ANDIF_EXPR | |
1486 | ? truthvalue_false_node | |
1487 | : truthvalue_true_node)); | |
fc501191 | 1488 | c_disable_warnings (unused_p); |
aac24642 | 1489 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self, |
1490 | for_int_const); | |
f59e3889 | 1491 | STRIP_TYPE_NOPS (op1); |
fc501191 | 1492 | c_enable_warnings (unused_p); |
672d914b | 1493 | |
aac24642 | 1494 | if (for_int_const |
1495 | && (TREE_CODE (op0) != INTEGER_CST | |
1496 | /* Require OP1 be an INTEGER_CST only if it's evaluated. */ | |
1497 | || (!unused_p && TREE_CODE (op1) != INTEGER_CST))) | |
1498 | goto out; | |
1499 | ||
a75b1c71 | 1500 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1501 | ret = in_init | |
389dd41b | 1502 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1503 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1504 | else |
1505 | ret = fold (expr); | |
1506 | *maybe_const_operands &= op0_const; | |
1507 | *maybe_const_itself &= op0_const_self; | |
1508 | if (!(flag_isoc99 | |
1509 | && op0_const | |
1510 | && op0_const_self | |
1511 | && (code == TRUTH_ANDIF_EXPR | |
1512 | ? op0 == truthvalue_false_node | |
1513 | : op0 == truthvalue_true_node))) | |
1514 | *maybe_const_operands &= op1_const; | |
1515 | if (!(op0_const | |
1516 | && op0_const_self | |
1517 | && (code == TRUTH_ANDIF_EXPR | |
1518 | ? op0 == truthvalue_false_node | |
1519 | : op0 == truthvalue_true_node))) | |
1520 | *maybe_const_itself &= op1_const_self; | |
1521 | goto out; | |
1522 | ||
1523 | case COND_EXPR: | |
1524 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1525 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1526 | orig_op2 = op2 = TREE_OPERAND (expr, 2); | |
aac24642 | 1527 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self, |
1528 | for_int_const); | |
672d914b | 1529 | |
f59e3889 | 1530 | STRIP_TYPE_NOPS (op0); |
fc501191 | 1531 | c_disable_warnings (op0 == truthvalue_false_node); |
aac24642 | 1532 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self, |
1533 | for_int_const); | |
f59e3889 | 1534 | STRIP_TYPE_NOPS (op1); |
fc501191 | 1535 | c_enable_warnings (op0 == truthvalue_false_node); |
672d914b | 1536 | |
fc501191 | 1537 | c_disable_warnings (op0 == truthvalue_true_node); |
aac24642 | 1538 | op2 = c_fully_fold_internal (op2, in_init, &op2_const, &op2_const_self, |
1539 | for_int_const); | |
f59e3889 | 1540 | STRIP_TYPE_NOPS (op2); |
fc501191 | 1541 | c_enable_warnings (op0 == truthvalue_true_node); |
672d914b | 1542 | |
aac24642 | 1543 | if (for_int_const |
1544 | && (TREE_CODE (op0) != INTEGER_CST | |
1545 | /* Only the evaluated operand must be an INTEGER_CST. */ | |
1546 | || (op0 == truthvalue_true_node | |
1547 | ? TREE_CODE (op1) != INTEGER_CST | |
1548 | : TREE_CODE (op2) != INTEGER_CST))) | |
1549 | goto out; | |
1550 | ||
a75b1c71 | 1551 | if (op0 != orig_op0 || op1 != orig_op1 || op2 != orig_op2) |
389dd41b | 1552 | ret = fold_build3_loc (loc, code, TREE_TYPE (expr), op0, op1, op2); |
a75b1c71 | 1553 | else |
1554 | ret = fold (expr); | |
1555 | *maybe_const_operands &= op0_const; | |
1556 | *maybe_const_itself &= op0_const_self; | |
1557 | if (!(flag_isoc99 | |
1558 | && op0_const | |
1559 | && op0_const_self | |
1560 | && op0 == truthvalue_false_node)) | |
1561 | *maybe_const_operands &= op1_const; | |
1562 | if (!(op0_const | |
1563 | && op0_const_self | |
1564 | && op0 == truthvalue_false_node)) | |
1565 | *maybe_const_itself &= op1_const_self; | |
1566 | if (!(flag_isoc99 | |
1567 | && op0_const | |
1568 | && op0_const_self | |
1569 | && op0 == truthvalue_true_node)) | |
1570 | *maybe_const_operands &= op2_const; | |
1571 | if (!(op0_const | |
1572 | && op0_const_self | |
1573 | && op0 == truthvalue_true_node)) | |
1574 | *maybe_const_itself &= op2_const_self; | |
1575 | goto out; | |
1576 | ||
c6418a4e | 1577 | case EXCESS_PRECISION_EXPR: |
1578 | /* Each case where an operand with excess precision may be | |
1579 | encountered must remove the EXCESS_PRECISION_EXPR around | |
1580 | inner operands and possibly put one around the whole | |
1581 | expression or possibly convert to the semantic type (which | |
1582 | c_fully_fold does); we cannot tell at this stage which is | |
1583 | appropriate in any particular case. */ | |
1584 | gcc_unreachable (); | |
1585 | ||
a75b1c71 | 1586 | default: |
1587 | /* Various codes may appear through folding built-in functions | |
1588 | and their arguments. */ | |
1589 | goto out; | |
1590 | } | |
1591 | ||
1592 | out: | |
1593 | /* Some folding may introduce NON_LVALUE_EXPRs; all lvalue checks | |
1594 | have been done by this point, so remove them again. */ | |
1595 | nowarning |= TREE_NO_WARNING (ret); | |
1596 | STRIP_TYPE_NOPS (ret); | |
1597 | if (nowarning && !TREE_NO_WARNING (ret)) | |
1598 | { | |
1599 | if (!CAN_HAVE_LOCATION_P (ret)) | |
1600 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
1601 | TREE_NO_WARNING (ret) = 1; | |
1602 | } | |
1603 | if (ret != expr) | |
1604 | protected_set_expr_location (ret, loc); | |
1605 | return ret; | |
1606 | } | |
1607 | ||
1608 | /* If not optimizing, EXP is not a VAR_DECL, or EXP has array type, | |
1609 | return EXP. Otherwise, return either EXP or its known constant | |
1610 | value (if it has one), but return EXP if EXP has mode BLKmode. ??? | |
1611 | Is the BLKmode test appropriate? */ | |
1612 | ||
1613 | tree | |
1614 | decl_constant_value_for_optimization (tree exp) | |
1615 | { | |
1616 | tree ret; | |
1617 | ||
1618 | /* This function is only used by C, for c_fully_fold and other | |
1619 | optimization, and may not be correct for C++. */ | |
1620 | if (c_dialect_cxx ()) | |
1621 | gcc_unreachable (); | |
1622 | ||
1623 | if (!optimize | |
1624 | || TREE_CODE (exp) != VAR_DECL | |
1625 | || TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1626 | || DECL_MODE (exp) == BLKmode) | |
1627 | return exp; | |
1628 | ||
1629 | ret = decl_constant_value (exp); | |
1630 | /* Avoid unwanted tree sharing between the initializer and current | |
1631 | function's body where the tree can be modified e.g. by the | |
1632 | gimplifier. */ | |
1633 | if (ret != exp && TREE_STATIC (exp)) | |
1634 | ret = unshare_expr (ret); | |
1635 | return ret; | |
1636 | } | |
1637 | ||
2a1736ed | 1638 | /* Print a warning if a constant expression had overflow in folding. |
1639 | Invoke this function on every expression that the language | |
1640 | requires to be a constant expression. | |
1641 | Note the ANSI C standard says it is erroneous for a | |
1642 | constant expression to overflow. */ | |
b2806639 | 1643 | |
1644 | void | |
1cae46be | 1645 | constant_expression_warning (tree value) |
07317e69 | 1646 | { |
48e1416a | 1647 | if (warn_overflow && pedantic |
07317e69 | 1648 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
1649 | || TREE_CODE (value) == FIXED_CST | |
1650 | || TREE_CODE (value) == VECTOR_CST | |
1651 | || TREE_CODE (value) == COMPLEX_CST) | |
1652 | && TREE_OVERFLOW (value)) | |
21ca8540 | 1653 | pedwarn (input_location, OPT_Woverflow, "overflow in constant expression"); |
07317e69 | 1654 | } |
1655 | ||
1656 | /* The same as above but print an unconditional error. */ | |
1657 | void | |
1658 | constant_expression_error (tree value) | |
b2806639 | 1659 | { |
837e1122 | 1660 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
9421ebb9 | 1661 | || TREE_CODE (value) == FIXED_CST |
886cfd4f | 1662 | || TREE_CODE (value) == VECTOR_CST |
837e1122 | 1663 | || TREE_CODE (value) == COMPLEX_CST) |
07317e69 | 1664 | && TREE_OVERFLOW (value)) |
1665 | error ("overflow in constant expression"); | |
2a1736ed | 1666 | } |
1667 | ||
f170d67f | 1668 | /* Print a warning if an expression had overflow in folding and its |
1669 | operands hadn't. | |
1670 | ||
2a1736ed | 1671 | Invoke this function on every expression that |
1672 | (1) appears in the source code, and | |
f170d67f | 1673 | (2) is a constant expression that overflowed, and |
2a1736ed | 1674 | (3) is not already checked by convert_and_check; |
f170d67f | 1675 | however, do not invoke this function on operands of explicit casts |
1676 | or when the expression is the result of an operator and any operand | |
1677 | already overflowed. */ | |
2a1736ed | 1678 | |
1679 | void | |
e60a6f7b | 1680 | overflow_warning (location_t loc, tree value) |
2a1736ed | 1681 | { |
48d94ede | 1682 | if (c_inhibit_evaluation_warnings != 0) |
1683 | return; | |
f170d67f | 1684 | |
1685 | switch (TREE_CODE (value)) | |
886cfd4f | 1686 | { |
f170d67f | 1687 | case INTEGER_CST: |
e60a6f7b | 1688 | warning_at (loc, OPT_Woverflow, "integer overflow in expression"); |
f170d67f | 1689 | break; |
48e1416a | 1690 | |
f170d67f | 1691 | case REAL_CST: |
e60a6f7b | 1692 | warning_at (loc, OPT_Woverflow, |
1693 | "floating point overflow in expression"); | |
f170d67f | 1694 | break; |
48e1416a | 1695 | |
9421ebb9 | 1696 | case FIXED_CST: |
e60a6f7b | 1697 | warning_at (loc, OPT_Woverflow, "fixed-point overflow in expression"); |
9421ebb9 | 1698 | break; |
1699 | ||
f170d67f | 1700 | case VECTOR_CST: |
e60a6f7b | 1701 | warning_at (loc, OPT_Woverflow, "vector overflow in expression"); |
f170d67f | 1702 | break; |
48e1416a | 1703 | |
f170d67f | 1704 | case COMPLEX_CST: |
1705 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
e60a6f7b | 1706 | warning_at (loc, OPT_Woverflow, |
1707 | "complex integer overflow in expression"); | |
f170d67f | 1708 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) |
e60a6f7b | 1709 | warning_at (loc, OPT_Woverflow, |
1710 | "complex floating point overflow in expression"); | |
f170d67f | 1711 | break; |
1712 | ||
1713 | default: | |
1714 | break; | |
886cfd4f | 1715 | } |
2a1736ed | 1716 | } |
1717 | ||
03033af4 | 1718 | /* Warn about uses of logical || / && operator in a context where it |
1719 | is likely that the bitwise equivalent was intended by the | |
1720 | programmer. We have seen an expression in which CODE is a binary | |
9c20c4fc | 1721 | operator used to combine expressions OP_LEFT and OP_RIGHT, which before folding |
1722 | had CODE_LEFT and CODE_RIGHT, into an expression of type TYPE. */ | |
b13d1547 | 1723 | void |
9c20c4fc | 1724 | warn_logical_operator (location_t location, enum tree_code code, tree type, |
48e1416a | 1725 | enum tree_code code_left, tree op_left, |
03033af4 | 1726 | enum tree_code ARG_UNUSED (code_right), tree op_right) |
b13d1547 | 1727 | { |
9c20c4fc | 1728 | int or_op = (code == TRUTH_ORIF_EXPR || code == TRUTH_OR_EXPR); |
1729 | int in0_p, in1_p, in_p; | |
1730 | tree low0, low1, low, high0, high1, high, lhs, rhs, tem; | |
1731 | bool strict_overflow_p = false; | |
1732 | ||
03033af4 | 1733 | if (code != TRUTH_ANDIF_EXPR |
1734 | && code != TRUTH_AND_EXPR | |
1735 | && code != TRUTH_ORIF_EXPR | |
1736 | && code != TRUTH_OR_EXPR) | |
1737 | return; | |
1738 | ||
439606a9 | 1739 | /* We don't want to warn if either operand comes from a macro |
1740 | expansion. ??? This doesn't work with e.g. NEGATE_EXPR yet; | |
1741 | see PR61534. */ | |
1742 | if (from_macro_expansion_at (EXPR_LOCATION (op_left)) | |
1743 | || from_macro_expansion_at (EXPR_LOCATION (op_right))) | |
1744 | return; | |
1745 | ||
03033af4 | 1746 | /* Warn if &&/|| are being used in a context where it is |
1747 | likely that the bitwise equivalent was intended by the | |
1748 | programmer. That is, an expression such as op && MASK | |
1749 | where op should not be any boolean expression, nor a | |
1750 | constant, and mask seems to be a non-boolean integer constant. */ | |
1751 | if (!truth_value_p (code_left) | |
1752 | && INTEGRAL_TYPE_P (TREE_TYPE (op_left)) | |
1753 | && !CONSTANT_CLASS_P (op_left) | |
1754 | && !TREE_NO_WARNING (op_left) | |
1755 | && TREE_CODE (op_right) == INTEGER_CST | |
1756 | && !integer_zerop (op_right) | |
1757 | && !integer_onep (op_right)) | |
b13d1547 | 1758 | { |
9c20c4fc | 1759 | if (or_op) |
03033af4 | 1760 | warning_at (location, OPT_Wlogical_op, "logical %<or%>" |
1761 | " applied to non-boolean constant"); | |
1762 | else | |
1763 | warning_at (location, OPT_Wlogical_op, "logical %<and%>" | |
1764 | " applied to non-boolean constant"); | |
1765 | TREE_NO_WARNING (op_left) = true; | |
9c20c4fc | 1766 | return; |
1767 | } | |
1768 | ||
1769 | /* We do not warn for constants because they are typical of macro | |
1770 | expansions that test for features. */ | |
1771 | if (CONSTANT_CLASS_P (op_left) || CONSTANT_CLASS_P (op_right)) | |
1772 | return; | |
1773 | ||
1774 | /* This warning only makes sense with logical operands. */ | |
1775 | if (!(truth_value_p (TREE_CODE (op_left)) | |
1776 | || INTEGRAL_TYPE_P (TREE_TYPE (op_left))) | |
1777 | || !(truth_value_p (TREE_CODE (op_right)) | |
1778 | || INTEGRAL_TYPE_P (TREE_TYPE (op_right)))) | |
1779 | return; | |
1780 | ||
5e84569c | 1781 | /* The range computations only work with scalars. */ |
1782 | if (VECTOR_TYPE_P (TREE_TYPE (op_left)) | |
1783 | || VECTOR_TYPE_P (TREE_TYPE (op_right))) | |
1784 | return; | |
9c20c4fc | 1785 | |
686369e8 | 1786 | /* We first test whether either side separately is trivially true |
1787 | (with OR) or trivially false (with AND). If so, do not warn. | |
1788 | This is a common idiom for testing ranges of data types in | |
1789 | portable code. */ | |
1790 | lhs = make_range (op_left, &in0_p, &low0, &high0, &strict_overflow_p); | |
1791 | if (!lhs) | |
1792 | return; | |
1793 | if (TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) | |
9c20c4fc | 1794 | lhs = C_MAYBE_CONST_EXPR_EXPR (lhs); |
1795 | ||
686369e8 | 1796 | /* If this is an OR operation, invert both sides; now, the result |
1797 | should be always false to get a warning. */ | |
1798 | if (or_op) | |
1799 | in0_p = !in0_p; | |
1800 | ||
1801 | tem = build_range_check (UNKNOWN_LOCATION, type, lhs, in0_p, low0, high0); | |
d42e7c5a | 1802 | if (tem && integer_zerop (tem)) |
686369e8 | 1803 | return; |
1804 | ||
1805 | rhs = make_range (op_right, &in1_p, &low1, &high1, &strict_overflow_p); | |
1806 | if (!rhs) | |
1807 | return; | |
1808 | if (TREE_CODE (rhs) == C_MAYBE_CONST_EXPR) | |
9c20c4fc | 1809 | rhs = C_MAYBE_CONST_EXPR_EXPR (rhs); |
48e1416a | 1810 | |
686369e8 | 1811 | /* If this is an OR operation, invert both sides; now, the result |
1812 | should be always false to get a warning. */ | |
9c20c4fc | 1813 | if (or_op) |
686369e8 | 1814 | in1_p = !in1_p; |
48e1416a | 1815 | |
686369e8 | 1816 | tem = build_range_check (UNKNOWN_LOCATION, type, rhs, in1_p, low1, high1); |
d42e7c5a | 1817 | if (tem && integer_zerop (tem)) |
686369e8 | 1818 | return; |
1819 | ||
1820 | /* If both expressions have the same operand, if we can merge the | |
485f6b9c | 1821 | ranges, ... */ |
686369e8 | 1822 | if (operand_equal_p (lhs, rhs, 0) |
9c20c4fc | 1823 | && merge_ranges (&in_p, &low, &high, in0_p, low0, high0, |
485f6b9c | 1824 | in1_p, low1, high1)) |
9c20c4fc | 1825 | { |
485f6b9c | 1826 | tem = build_range_check (UNKNOWN_LOCATION, type, lhs, in_p, low, high); |
1827 | /* ... and if the range test is always false, then warn. */ | |
1828 | if (tem && integer_zerop (tem)) | |
1829 | { | |
1830 | if (or_op) | |
1831 | warning_at (location, OPT_Wlogical_op, | |
1832 | "logical %<or%> of collectively exhaustive tests is " | |
1833 | "always true"); | |
1834 | else | |
1835 | warning_at (location, OPT_Wlogical_op, | |
1836 | "logical %<and%> of mutually exclusive tests is " | |
1837 | "always false"); | |
1838 | } | |
1839 | /* Or warn if the operands have exactly the same range, e.g. | |
1840 | A > 0 && A > 0. */ | |
1841 | else if (low0 == low1 && high0 == high1) | |
1842 | { | |
1843 | if (or_op) | |
1844 | warning_at (location, OPT_Wlogical_op, | |
1845 | "logical %<or%> of equal expressions"); | |
1846 | else | |
1847 | warning_at (location, OPT_Wlogical_op, | |
1848 | "logical %<and%> of equal expressions"); | |
1849 | } | |
b13d1547 | 1850 | } |
1851 | } | |
1852 | ||
32dc1512 | 1853 | /* Warn about logical not used on the left hand side operand of a comparison. |
1854 | This function assumes that the LHS is inside of TRUTH_NOT_EXPR. | |
dc6229e8 | 1855 | Do not warn if RHS is of a boolean type. */ |
32dc1512 | 1856 | |
1857 | void | |
1858 | warn_logical_not_parentheses (location_t location, enum tree_code code, | |
dc6229e8 | 1859 | tree rhs) |
32dc1512 | 1860 | { |
dc6229e8 | 1861 | if (TREE_CODE_CLASS (code) != tcc_comparison |
1862 | || TREE_TYPE (rhs) == NULL_TREE | |
1863 | || TREE_CODE (TREE_TYPE (rhs)) == BOOLEAN_TYPE) | |
32dc1512 | 1864 | return; |
1865 | ||
16f958b3 | 1866 | /* Don't warn for !x == 0 or !y != 0, those are equivalent to |
1867 | !(x == 0) or !(y != 0). */ | |
1868 | if ((code == EQ_EXPR || code == NE_EXPR) | |
1869 | && integer_zerop (rhs)) | |
1870 | return; | |
1871 | ||
32dc1512 | 1872 | warning_at (location, OPT_Wlogical_not_parentheses, |
1873 | "logical not is only applied to the left hand side of " | |
1874 | "comparison"); | |
1875 | } | |
b13d1547 | 1876 | |
3d177e8c | 1877 | /* Warn if EXP contains any computations whose results are not used. |
1878 | Return true if a warning is printed; false otherwise. LOCUS is the | |
1879 | (potential) location of the expression. */ | |
1880 | ||
1881 | bool | |
1882 | warn_if_unused_value (const_tree exp, location_t locus) | |
1883 | { | |
1884 | restart: | |
1885 | if (TREE_USED (exp) || TREE_NO_WARNING (exp)) | |
1886 | return false; | |
1887 | ||
1888 | /* Don't warn about void constructs. This includes casting to void, | |
1889 | void function calls, and statement expressions with a final cast | |
1890 | to void. */ | |
1891 | if (VOID_TYPE_P (TREE_TYPE (exp))) | |
1892 | return false; | |
1893 | ||
1894 | if (EXPR_HAS_LOCATION (exp)) | |
1895 | locus = EXPR_LOCATION (exp); | |
1896 | ||
1897 | switch (TREE_CODE (exp)) | |
1898 | { | |
1899 | case PREINCREMENT_EXPR: | |
1900 | case POSTINCREMENT_EXPR: | |
1901 | case PREDECREMENT_EXPR: | |
1902 | case POSTDECREMENT_EXPR: | |
1903 | case MODIFY_EXPR: | |
1904 | case INIT_EXPR: | |
1905 | case TARGET_EXPR: | |
1906 | case CALL_EXPR: | |
1907 | case TRY_CATCH_EXPR: | |
1908 | case WITH_CLEANUP_EXPR: | |
1909 | case EXIT_EXPR: | |
1910 | case VA_ARG_EXPR: | |
1911 | return false; | |
1912 | ||
1913 | case BIND_EXPR: | |
1914 | /* For a binding, warn if no side effect within it. */ | |
1915 | exp = BIND_EXPR_BODY (exp); | |
1916 | goto restart; | |
1917 | ||
1918 | case SAVE_EXPR: | |
1919 | case NON_LVALUE_EXPR: | |
d85dbdb3 | 1920 | case NOP_EXPR: |
3d177e8c | 1921 | exp = TREE_OPERAND (exp, 0); |
1922 | goto restart; | |
1923 | ||
1924 | case TRUTH_ORIF_EXPR: | |
1925 | case TRUTH_ANDIF_EXPR: | |
1926 | /* In && or ||, warn if 2nd operand has no side effect. */ | |
1927 | exp = TREE_OPERAND (exp, 1); | |
1928 | goto restart; | |
1929 | ||
1930 | case COMPOUND_EXPR: | |
1931 | if (warn_if_unused_value (TREE_OPERAND (exp, 0), locus)) | |
1932 | return true; | |
1933 | /* Let people do `(foo (), 0)' without a warning. */ | |
1934 | if (TREE_CONSTANT (TREE_OPERAND (exp, 1))) | |
1935 | return false; | |
1936 | exp = TREE_OPERAND (exp, 1); | |
1937 | goto restart; | |
1938 | ||
1939 | case COND_EXPR: | |
1940 | /* If this is an expression with side effects, don't warn; this | |
1941 | case commonly appears in macro expansions. */ | |
1942 | if (TREE_SIDE_EFFECTS (exp)) | |
1943 | return false; | |
1944 | goto warn; | |
1945 | ||
1946 | case INDIRECT_REF: | |
1947 | /* Don't warn about automatic dereferencing of references, since | |
1948 | the user cannot control it. */ | |
1949 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == REFERENCE_TYPE) | |
1950 | { | |
1951 | exp = TREE_OPERAND (exp, 0); | |
1952 | goto restart; | |
1953 | } | |
1954 | /* Fall through. */ | |
1955 | ||
1956 | default: | |
1957 | /* Referencing a volatile value is a side effect, so don't warn. */ | |
1958 | if ((DECL_P (exp) || REFERENCE_CLASS_P (exp)) | |
1959 | && TREE_THIS_VOLATILE (exp)) | |
1960 | return false; | |
1961 | ||
1962 | /* If this is an expression which has no operands, there is no value | |
1963 | to be unused. There are no such language-independent codes, | |
1964 | but front ends may define such. */ | |
1965 | if (EXPRESSION_CLASS_P (exp) && TREE_OPERAND_LENGTH (exp) == 0) | |
1966 | return false; | |
1967 | ||
1968 | warn: | |
1969 | return warning_at (locus, OPT_Wunused_value, "value computed is not used"); | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | ||
bcf22371 | 1974 | /* Print a warning about casts that might indicate violation |
1975 | of strict aliasing rules if -Wstrict-aliasing is used and | |
1e31ff37 | 1976 | strict aliasing mode is in effect. OTYPE is the original |
1977 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
bcf22371 | 1978 | |
e6fa0ea6 | 1979 | bool |
1e31ff37 | 1980 | strict_aliasing_warning (tree otype, tree type, tree expr) |
bcf22371 | 1981 | { |
45bb3afb | 1982 | /* Strip pointer conversion chains and get to the correct original type. */ |
1983 | STRIP_NOPS (expr); | |
1984 | otype = TREE_TYPE (expr); | |
1985 | ||
f06537f2 | 1986 | if (!(flag_strict_aliasing |
1987 | && POINTER_TYPE_P (type) | |
1988 | && POINTER_TYPE_P (otype) | |
1989 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
1990 | /* If the type we are casting to is a ref-all pointer | |
1991 | dereferencing it is always valid. */ | |
1992 | || TYPE_REF_CAN_ALIAS_ALL (type)) | |
e6fa0ea6 | 1993 | return false; |
1994 | ||
1995 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
bcf22371 | 1996 | && (DECL_P (TREE_OPERAND (expr, 0)) |
e6fa0ea6 | 1997 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
bcf22371 | 1998 | { |
1999 | /* Casting the address of an object to non void pointer. Warn | |
2000 | if the cast breaks type based aliasing. */ | |
e6fa0ea6 | 2001 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
2002 | { | |
2003 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
2004 | "might break strict-aliasing rules"); | |
2005 | return true; | |
2006 | } | |
bcf22371 | 2007 | else |
2008 | { | |
48e1416a | 2009 | /* warn_strict_aliasing >= 3. This includes the default (3). |
e6fa0ea6 | 2010 | Only warn if the cast is dereferenced immediately. */ |
32c2fdea | 2011 | alias_set_type set1 = |
e6fa0ea6 | 2012 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
32c2fdea | 2013 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
bcf22371 | 2014 | |
62d823d0 | 2015 | if (set1 != set2 && set2 != 0 |
2016 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
e6fa0ea6 | 2017 | { |
2018 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2019 | "pointer will break strict-aliasing rules"); | |
2020 | return true; | |
2021 | } | |
2022 | else if (warn_strict_aliasing == 2 | |
879f881c | 2023 | && !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 2024 | { |
2025 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2026 | "pointer might break strict-aliasing rules"); | |
2027 | return true; | |
2028 | } | |
bcf22371 | 2029 | } |
2030 | } | |
e6fa0ea6 | 2031 | else |
2032 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
2033 | { | |
2034 | /* At this level, warn for any conversions, even if an address is | |
2035 | not taken in the same statement. This will likely produce many | |
2036 | false positives, but could be useful to pinpoint problems that | |
2037 | are not revealed at higher levels. */ | |
32c2fdea | 2038 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
2039 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
2040 | if (!COMPLETE_TYPE_P (type) | |
879f881c | 2041 | || !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 2042 | { |
2043 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
2044 | "pointer might break strict-aliasing rules"); | |
2045 | return true; | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | return false; | |
bcf22371 | 2050 | } |
2051 | ||
f003f5dc | 2052 | /* Warn about memset (&a, 0, sizeof (&a)); and similar mistakes with |
2053 | sizeof as last operand of certain builtins. */ | |
2054 | ||
2055 | void | |
57f872a2 | 2056 | sizeof_pointer_memaccess_warning (location_t *sizeof_arg_loc, tree callee, |
f1f41a6c | 2057 | vec<tree, va_gc> *params, tree *sizeof_arg, |
f003f5dc | 2058 | bool (*comp_types) (tree, tree)) |
2059 | { | |
2060 | tree type, dest = NULL_TREE, src = NULL_TREE, tem; | |
57f872a2 | 2061 | bool strop = false, cmp = false; |
2062 | unsigned int idx = ~0; | |
2063 | location_t loc; | |
f003f5dc | 2064 | |
2065 | if (TREE_CODE (callee) != FUNCTION_DECL | |
2066 | || DECL_BUILT_IN_CLASS (callee) != BUILT_IN_NORMAL | |
f1f41a6c | 2067 | || vec_safe_length (params) <= 1) |
f003f5dc | 2068 | return; |
2069 | ||
f003f5dc | 2070 | switch (DECL_FUNCTION_CODE (callee)) |
2071 | { | |
2072 | case BUILT_IN_STRNCMP: | |
2073 | case BUILT_IN_STRNCASECMP: | |
57f872a2 | 2074 | cmp = true; |
2075 | /* FALLTHRU */ | |
f003f5dc | 2076 | case BUILT_IN_STRNCPY: |
57f872a2 | 2077 | case BUILT_IN_STRNCPY_CHK: |
f003f5dc | 2078 | case BUILT_IN_STRNCAT: |
57f872a2 | 2079 | case BUILT_IN_STRNCAT_CHK: |
2080 | case BUILT_IN_STPNCPY: | |
2081 | case BUILT_IN_STPNCPY_CHK: | |
f003f5dc | 2082 | strop = true; |
2083 | /* FALLTHRU */ | |
2084 | case BUILT_IN_MEMCPY: | |
57f872a2 | 2085 | case BUILT_IN_MEMCPY_CHK: |
f003f5dc | 2086 | case BUILT_IN_MEMMOVE: |
57f872a2 | 2087 | case BUILT_IN_MEMMOVE_CHK: |
f1f41a6c | 2088 | if (params->length () < 3) |
57f872a2 | 2089 | return; |
f1f41a6c | 2090 | src = (*params)[1]; |
2091 | dest = (*params)[0]; | |
57f872a2 | 2092 | idx = 2; |
2093 | break; | |
2094 | case BUILT_IN_BCOPY: | |
f1f41a6c | 2095 | if (params->length () < 3) |
57f872a2 | 2096 | return; |
f1f41a6c | 2097 | src = (*params)[0]; |
2098 | dest = (*params)[1]; | |
57f872a2 | 2099 | idx = 2; |
2100 | break; | |
f003f5dc | 2101 | case BUILT_IN_MEMCMP: |
57f872a2 | 2102 | case BUILT_IN_BCMP: |
f1f41a6c | 2103 | if (params->length () < 3) |
f003f5dc | 2104 | return; |
f1f41a6c | 2105 | src = (*params)[1]; |
2106 | dest = (*params)[0]; | |
57f872a2 | 2107 | idx = 2; |
2108 | cmp = true; | |
f003f5dc | 2109 | break; |
2110 | case BUILT_IN_MEMSET: | |
57f872a2 | 2111 | case BUILT_IN_MEMSET_CHK: |
f1f41a6c | 2112 | if (params->length () < 3) |
f003f5dc | 2113 | return; |
f1f41a6c | 2114 | dest = (*params)[0]; |
57f872a2 | 2115 | idx = 2; |
2116 | break; | |
2117 | case BUILT_IN_BZERO: | |
f1f41a6c | 2118 | dest = (*params)[0]; |
57f872a2 | 2119 | idx = 1; |
f003f5dc | 2120 | break; |
2121 | case BUILT_IN_STRNDUP: | |
f1f41a6c | 2122 | src = (*params)[0]; |
f003f5dc | 2123 | strop = true; |
57f872a2 | 2124 | idx = 1; |
2125 | break; | |
2126 | case BUILT_IN_MEMCHR: | |
f1f41a6c | 2127 | if (params->length () < 3) |
57f872a2 | 2128 | return; |
f1f41a6c | 2129 | src = (*params)[0]; |
57f872a2 | 2130 | idx = 2; |
2131 | break; | |
2132 | case BUILT_IN_SNPRINTF: | |
2133 | case BUILT_IN_SNPRINTF_CHK: | |
2134 | case BUILT_IN_VSNPRINTF: | |
2135 | case BUILT_IN_VSNPRINTF_CHK: | |
f1f41a6c | 2136 | dest = (*params)[0]; |
57f872a2 | 2137 | idx = 1; |
2138 | strop = true; | |
f003f5dc | 2139 | break; |
2140 | default: | |
2141 | break; | |
2142 | } | |
2143 | ||
57f872a2 | 2144 | if (idx >= 3) |
2145 | return; | |
2146 | ||
2147 | if (sizeof_arg[idx] == NULL || sizeof_arg[idx] == error_mark_node) | |
2148 | return; | |
2149 | ||
2150 | type = TYPE_P (sizeof_arg[idx]) | |
2151 | ? sizeof_arg[idx] : TREE_TYPE (sizeof_arg[idx]); | |
2152 | if (!POINTER_TYPE_P (type)) | |
2153 | return; | |
2154 | ||
f003f5dc | 2155 | if (dest |
2156 | && (tem = tree_strip_nop_conversions (dest)) | |
2157 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2158 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2159 | return; | |
2160 | ||
2161 | if (src | |
2162 | && (tem = tree_strip_nop_conversions (src)) | |
2163 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2164 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2165 | return; | |
2166 | ||
57f872a2 | 2167 | loc = sizeof_arg_loc[idx]; |
2168 | ||
2169 | if (dest && !cmp) | |
f003f5dc | 2170 | { |
57f872a2 | 2171 | if (!TYPE_P (sizeof_arg[idx]) |
2172 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
f003f5dc | 2173 | && comp_types (TREE_TYPE (dest), type)) |
2174 | { | |
57f872a2 | 2175 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
f003f5dc | 2176 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2177 | "argument to %<sizeof%> in %qD call is the same " | |
2178 | "expression as the destination; did you mean to " | |
2179 | "remove the addressof?", callee); | |
2180 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2181 | == TYPE_PRECISION (char_type_node)) | |
2182 | || strop) | |
2183 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2184 | "argument to %<sizeof%> in %qD call is the same " | |
2185 | "expression as the destination; did you mean to " | |
2186 | "provide an explicit length?", callee); | |
2187 | else | |
2188 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2189 | "argument to %<sizeof%> in %qD call is the same " | |
2190 | "expression as the destination; did you mean to " | |
2191 | "dereference it?", callee); | |
2192 | return; | |
2193 | } | |
2194 | ||
2195 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2196 | && !strop | |
2197 | && comp_types (TREE_TYPE (dest), type) | |
2198 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2199 | { | |
2200 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2201 | "argument to %<sizeof%> in %qD call is the same " | |
2202 | "pointer type %qT as the destination; expected %qT " | |
2203 | "or an explicit length", callee, TREE_TYPE (dest), | |
2204 | TREE_TYPE (TREE_TYPE (dest))); | |
2205 | return; | |
2206 | } | |
2207 | } | |
2208 | ||
57f872a2 | 2209 | if (src && !cmp) |
f003f5dc | 2210 | { |
57f872a2 | 2211 | if (!TYPE_P (sizeof_arg[idx]) |
2212 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
f003f5dc | 2213 | && comp_types (TREE_TYPE (src), type)) |
2214 | { | |
57f872a2 | 2215 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
f003f5dc | 2216 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2217 | "argument to %<sizeof%> in %qD call is the same " | |
2218 | "expression as the source; did you mean to " | |
2219 | "remove the addressof?", callee); | |
2220 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2221 | == TYPE_PRECISION (char_type_node)) | |
2222 | || strop) | |
2223 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2224 | "argument to %<sizeof%> in %qD call is the same " | |
2225 | "expression as the source; did you mean to " | |
2226 | "provide an explicit length?", callee); | |
2227 | else | |
2228 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2229 | "argument to %<sizeof%> in %qD call is the same " | |
2230 | "expression as the source; did you mean to " | |
2231 | "dereference it?", callee); | |
2232 | return; | |
2233 | } | |
2234 | ||
2235 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2236 | && !strop | |
2237 | && comp_types (TREE_TYPE (src), type) | |
2238 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2239 | { | |
2240 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2241 | "argument to %<sizeof%> in %qD call is the same " | |
2242 | "pointer type %qT as the source; expected %qT " | |
2243 | "or an explicit length", callee, TREE_TYPE (src), | |
2244 | TREE_TYPE (TREE_TYPE (src))); | |
2245 | return; | |
2246 | } | |
2247 | } | |
57f872a2 | 2248 | |
2249 | if (dest) | |
2250 | { | |
2251 | if (!TYPE_P (sizeof_arg[idx]) | |
2252 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
2253 | && comp_types (TREE_TYPE (dest), type)) | |
2254 | { | |
2255 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2256 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2257 | "argument to %<sizeof%> in %qD call is the same " | |
2258 | "expression as the first source; did you mean to " | |
2259 | "remove the addressof?", callee); | |
2260 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2261 | == TYPE_PRECISION (char_type_node)) | |
2262 | || strop) | |
2263 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2264 | "argument to %<sizeof%> in %qD call is the same " | |
2265 | "expression as the first source; did you mean to " | |
2266 | "provide an explicit length?", callee); | |
2267 | else | |
2268 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2269 | "argument to %<sizeof%> in %qD call is the same " | |
2270 | "expression as the first source; did you mean to " | |
2271 | "dereference it?", callee); | |
2272 | return; | |
2273 | } | |
2274 | ||
2275 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2276 | && !strop | |
2277 | && comp_types (TREE_TYPE (dest), type) | |
2278 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2279 | { | |
2280 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2281 | "argument to %<sizeof%> in %qD call is the same " | |
2282 | "pointer type %qT as the first source; expected %qT " | |
2283 | "or an explicit length", callee, TREE_TYPE (dest), | |
2284 | TREE_TYPE (TREE_TYPE (dest))); | |
2285 | return; | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | if (src) | |
2290 | { | |
2291 | if (!TYPE_P (sizeof_arg[idx]) | |
2292 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
2293 | && comp_types (TREE_TYPE (src), type)) | |
2294 | { | |
2295 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2296 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2297 | "argument to %<sizeof%> in %qD call is the same " | |
2298 | "expression as the second source; did you mean to " | |
2299 | "remove the addressof?", callee); | |
2300 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2301 | == TYPE_PRECISION (char_type_node)) | |
2302 | || strop) | |
2303 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2304 | "argument to %<sizeof%> in %qD call is the same " | |
2305 | "expression as the second source; did you mean to " | |
2306 | "provide an explicit length?", callee); | |
2307 | else | |
2308 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2309 | "argument to %<sizeof%> in %qD call is the same " | |
2310 | "expression as the second source; did you mean to " | |
2311 | "dereference it?", callee); | |
2312 | return; | |
2313 | } | |
2314 | ||
2315 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2316 | && !strop | |
2317 | && comp_types (TREE_TYPE (src), type) | |
2318 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2319 | { | |
2320 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2321 | "argument to %<sizeof%> in %qD call is the same " | |
2322 | "pointer type %qT as the second source; expected %qT " | |
2323 | "or an explicit length", callee, TREE_TYPE (src), | |
2324 | TREE_TYPE (TREE_TYPE (src))); | |
2325 | return; | |
2326 | } | |
2327 | } | |
2328 | ||
f003f5dc | 2329 | } |
2330 | ||
3f08e399 | 2331 | /* Warn for unlikely, improbable, or stupid DECL declarations |
2332 | of `main'. */ | |
2333 | ||
2334 | void | |
2335 | check_main_parameter_types (tree decl) | |
2336 | { | |
d0af78c5 | 2337 | function_args_iterator iter; |
2338 | tree type; | |
3f08e399 | 2339 | int argct = 0; |
2340 | ||
d0af78c5 | 2341 | FOREACH_FUNCTION_ARGS (TREE_TYPE (decl), type, iter) |
2342 | { | |
2343 | /* XXX void_type_node belies the abstraction. */ | |
2344 | if (type == void_type_node || type == error_mark_node ) | |
2345 | break; | |
2346 | ||
2026249a | 2347 | tree t = type; |
2348 | if (TYPE_ATOMIC (t)) | |
2349 | pedwarn (input_location, OPT_Wmain, | |
2350 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2351 | type, decl); | |
2352 | while (POINTER_TYPE_P (t)) | |
2353 | { | |
2354 | t = TREE_TYPE (t); | |
2355 | if (TYPE_ATOMIC (t)) | |
2356 | pedwarn (input_location, OPT_Wmain, | |
2357 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2358 | type, decl); | |
2359 | } | |
2360 | ||
d0af78c5 | 2361 | ++argct; |
2362 | switch (argct) | |
2363 | { | |
2364 | case 1: | |
2365 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
2366 | pedwarn (input_location, OPT_Wmain, | |
2367 | "first argument of %q+D should be %<int%>", decl); | |
2368 | break; | |
2369 | ||
2370 | case 2: | |
2371 | if (TREE_CODE (type) != POINTER_TYPE | |
2372 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2373 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2374 | != char_type_node)) | |
2375 | pedwarn (input_location, OPT_Wmain, | |
2376 | "second argument of %q+D should be %<char **%>", decl); | |
2377 | break; | |
2378 | ||
2379 | case 3: | |
2380 | if (TREE_CODE (type) != POINTER_TYPE | |
2381 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2382 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2383 | != char_type_node)) | |
2384 | pedwarn (input_location, OPT_Wmain, | |
2385 | "third argument of %q+D should probably be " | |
2386 | "%<char **%>", decl); | |
2387 | break; | |
2388 | } | |
2389 | } | |
3f08e399 | 2390 | |
2391 | /* It is intentional that this message does not mention the third | |
2392 | argument because it's only mentioned in an appendix of the | |
2393 | standard. */ | |
2394 | if (argct > 0 && (argct < 2 || argct > 3)) | |
d0af78c5 | 2395 | pedwarn (input_location, OPT_Wmain, |
2396 | "%q+D takes only zero or two arguments", decl); | |
90e645fa | 2397 | |
2398 | if (stdarg_p (TREE_TYPE (decl))) | |
2399 | pedwarn (input_location, OPT_Wmain, | |
2400 | "%q+D declared as variadic function", decl); | |
3f08e399 | 2401 | } |
2402 | ||
73437615 | 2403 | /* vector_targets_convertible_p is used for vector pointer types. The |
2404 | callers perform various checks that the qualifiers are satisfactory, | |
2405 | while OTOH vector_targets_convertible_p ignores the number of elements | |
2406 | in the vectors. That's fine with vector pointers as we can consider, | |
2407 | say, a vector of 8 elements as two consecutive vectors of 4 elements, | |
2408 | and that does not require and conversion of the pointer values. | |
2409 | In contrast, vector_types_convertible_p and | |
2410 | vector_types_compatible_elements_p are used for vector value types. */ | |
ed7c4e62 | 2411 | /* True if pointers to distinct types T1 and T2 can be converted to |
2412 | each other without an explicit cast. Only returns true for opaque | |
2413 | vector types. */ | |
2414 | bool | |
2415 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
2416 | { | |
2417 | if (TREE_CODE (t1) == VECTOR_TYPE && TREE_CODE (t2) == VECTOR_TYPE | |
8d125f7d | 2418 | && (TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ed7c4e62 | 2419 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2420 | return true; | |
2421 | ||
2422 | return false; | |
2423 | } | |
2424 | ||
73437615 | 2425 | /* vector_types_convertible_p is used for vector value types. |
2426 | It could in principle call vector_targets_convertible_p as a subroutine, | |
2427 | but then the check for vector type would be duplicated with its callers, | |
2428 | and also the purpose of vector_targets_convertible_p would become | |
2429 | muddled. | |
2430 | Where vector_types_convertible_p returns true, a conversion might still be | |
2431 | needed to make the types match. | |
2432 | In contrast, vector_targets_convertible_p is used for vector pointer | |
2433 | values, and vector_types_compatible_elements_p is used specifically | |
2434 | in the context for binary operators, as a check if use is possible without | |
2435 | conversion. */ | |
546c4794 | 2436 | /* True if vector types T1 and T2 can be converted to each other |
2437 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
2438 | can only be converted with -flax-vector-conversions yet that is not | |
2439 | in effect, emit a note telling the user about that option if such | |
2440 | a note has not previously been emitted. */ | |
2441 | bool | |
9f627b1a | 2442 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
8b4b9810 | 2443 | { |
546c4794 | 2444 | static bool emitted_lax_note = false; |
ae6db8ab | 2445 | bool convertible_lax; |
2446 | ||
8d125f7d | 2447 | if ((TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ae6db8ab | 2448 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2449 | return true; | |
2450 | ||
2451 | convertible_lax = | |
2452 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
2453 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
432dd330 | 2454 | TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2)) |
ae6db8ab | 2455 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) |
2456 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
546c4794 | 2457 | |
2458 | if (!convertible_lax || flag_lax_vector_conversions) | |
2459 | return convertible_lax; | |
2460 | ||
2461 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
29f51994 | 2462 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
546c4794 | 2463 | return true; |
2464 | ||
2465 | if (emit_lax_note && !emitted_lax_note) | |
2466 | { | |
2467 | emitted_lax_note = true; | |
5bcc316e | 2468 | inform (input_location, "use -flax-vector-conversions to permit " |
546c4794 | 2469 | "conversions between vectors with differing " |
2470 | "element types or numbers of subparts"); | |
2471 | } | |
2472 | ||
2473 | return false; | |
8b4b9810 | 2474 | } |
2475 | ||
bf0cb017 | 2476 | /* Build a VEC_PERM_EXPR if V0, V1 and MASK are not error_mark_nodes |
2477 | and have vector types, V0 has the same type as V1, and the number of | |
2478 | elements of V0, V1, MASK is the same. | |
2479 | ||
2480 | In case V1 is a NULL_TREE it is assumed that __builtin_shuffle was | |
2481 | called with two arguments. In this case implementation passes the | |
2482 | first argument twice in order to share the same tree code. This fact | |
2483 | could enable the mask-values being twice the vector length. This is | |
2484 | an implementation accident and this semantics is not guaranteed to | |
2485 | the user. */ | |
2486 | tree | |
68ea4406 | 2487 | c_build_vec_perm_expr (location_t loc, tree v0, tree v1, tree mask, |
2488 | bool complain) | |
bf0cb017 | 2489 | { |
2490 | tree ret; | |
2491 | bool wrap = true; | |
2492 | bool maybe_const = false; | |
2493 | bool two_arguments = false; | |
2494 | ||
2495 | if (v1 == NULL_TREE) | |
2496 | { | |
2497 | two_arguments = true; | |
2498 | v1 = v0; | |
2499 | } | |
2500 | ||
2501 | if (v0 == error_mark_node || v1 == error_mark_node | |
2502 | || mask == error_mark_node) | |
2503 | return error_mark_node; | |
2504 | ||
2505 | if (TREE_CODE (TREE_TYPE (mask)) != VECTOR_TYPE | |
2506 | || TREE_CODE (TREE_TYPE (TREE_TYPE (mask))) != INTEGER_TYPE) | |
2507 | { | |
68ea4406 | 2508 | if (complain) |
2509 | error_at (loc, "__builtin_shuffle last argument must " | |
2510 | "be an integer vector"); | |
bf0cb017 | 2511 | return error_mark_node; |
2512 | } | |
2513 | ||
2514 | if (TREE_CODE (TREE_TYPE (v0)) != VECTOR_TYPE | |
2515 | || TREE_CODE (TREE_TYPE (v1)) != VECTOR_TYPE) | |
2516 | { | |
68ea4406 | 2517 | if (complain) |
2518 | error_at (loc, "__builtin_shuffle arguments must be vectors"); | |
bf0cb017 | 2519 | return error_mark_node; |
2520 | } | |
2521 | ||
2522 | if (TYPE_MAIN_VARIANT (TREE_TYPE (v0)) != TYPE_MAIN_VARIANT (TREE_TYPE (v1))) | |
2523 | { | |
68ea4406 | 2524 | if (complain) |
2525 | error_at (loc, "__builtin_shuffle argument vectors must be of " | |
2526 | "the same type"); | |
bf0cb017 | 2527 | return error_mark_node; |
2528 | } | |
2529 | ||
2530 | if (TYPE_VECTOR_SUBPARTS (TREE_TYPE (v0)) | |
2531 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask)) | |
2532 | && TYPE_VECTOR_SUBPARTS (TREE_TYPE (v1)) | |
2533 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask))) | |
2534 | { | |
68ea4406 | 2535 | if (complain) |
2536 | error_at (loc, "__builtin_shuffle number of elements of the " | |
2537 | "argument vector(s) and the mask vector should " | |
2538 | "be the same"); | |
bf0cb017 | 2539 | return error_mark_node; |
2540 | } | |
2541 | ||
2542 | if (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (v0)))) | |
2543 | != GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (mask))))) | |
2544 | { | |
68ea4406 | 2545 | if (complain) |
2546 | error_at (loc, "__builtin_shuffle argument vector(s) inner type " | |
2547 | "must have the same size as inner type of the mask"); | |
bf0cb017 | 2548 | return error_mark_node; |
2549 | } | |
2550 | ||
2551 | if (!c_dialect_cxx ()) | |
2552 | { | |
2553 | /* Avoid C_MAYBE_CONST_EXPRs inside VEC_PERM_EXPR. */ | |
2554 | v0 = c_fully_fold (v0, false, &maybe_const); | |
2555 | wrap &= maybe_const; | |
2556 | ||
2557 | if (two_arguments) | |
2558 | v1 = v0 = save_expr (v0); | |
2559 | else | |
2560 | { | |
2561 | v1 = c_fully_fold (v1, false, &maybe_const); | |
2562 | wrap &= maybe_const; | |
2563 | } | |
2564 | ||
2565 | mask = c_fully_fold (mask, false, &maybe_const); | |
2566 | wrap &= maybe_const; | |
2567 | } | |
68ea4406 | 2568 | else if (two_arguments) |
2569 | v1 = v0 = save_expr (v0); | |
bf0cb017 | 2570 | |
2571 | ret = build3_loc (loc, VEC_PERM_EXPR, TREE_TYPE (v0), v0, v1, mask); | |
2572 | ||
2573 | if (!c_dialect_cxx () && !wrap) | |
2574 | ret = c_wrap_maybe_const (ret, true); | |
2575 | ||
2576 | return ret; | |
2577 | } | |
2578 | ||
7f506bca | 2579 | /* Like tree.c:get_narrower, but retain conversion from C++0x scoped enum |
2580 | to integral type. */ | |
2581 | ||
2582 | static tree | |
2583 | c_common_get_narrower (tree op, int *unsignedp_ptr) | |
2584 | { | |
2585 | op = get_narrower (op, unsignedp_ptr); | |
2586 | ||
2587 | if (TREE_CODE (TREE_TYPE (op)) == ENUMERAL_TYPE | |
2588 | && ENUM_IS_SCOPED (TREE_TYPE (op))) | |
2589 | { | |
2590 | /* C++0x scoped enumerations don't implicitly convert to integral | |
2591 | type; if we stripped an explicit conversion to a larger type we | |
2592 | need to replace it so common_type will still work. */ | |
a51edb4c | 2593 | tree type = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op)), |
2594 | TYPE_UNSIGNED (TREE_TYPE (op))); | |
7f506bca | 2595 | op = fold_convert (type, op); |
2596 | } | |
2597 | return op; | |
2598 | } | |
2599 | ||
2561cea2 | 2600 | /* This is a helper function of build_binary_op. |
2601 | ||
2602 | For certain operations if both args were extended from the same | |
2603 | smaller type, do the arithmetic in that type and then extend. | |
2604 | ||
2605 | BITWISE indicates a bitwise operation. | |
2606 | For them, this optimization is safe only if | |
2607 | both args are zero-extended or both are sign-extended. | |
2608 | Otherwise, we might change the result. | |
2609 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
48e1416a | 2610 | but calculated in (unsigned short) it would be (unsigned short)-1. |
2561cea2 | 2611 | */ |
7f506bca | 2612 | tree |
2613 | shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
2561cea2 | 2614 | { |
2615 | int unsigned0, unsigned1; | |
2616 | tree arg0, arg1; | |
2617 | int uns; | |
2618 | tree type; | |
2619 | ||
2620 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
2621 | excessive narrowing when we call get_narrower below. For | |
2622 | example, suppose that OP0 is of unsigned int extended | |
2623 | from signed char and that RESULT_TYPE is long long int. | |
2624 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
2625 | like | |
48e1416a | 2626 | |
2561cea2 | 2627 | (long long int) (unsigned int) signed_char |
2628 | ||
2629 | which get_narrower would narrow down to | |
48e1416a | 2630 | |
2561cea2 | 2631 | (unsigned int) signed char |
48e1416a | 2632 | |
2561cea2 | 2633 | If we do not cast OP0 first, get_narrower would return |
2634 | signed_char, which is inconsistent with the case of the | |
2635 | explicit cast. */ | |
2636 | op0 = convert (result_type, op0); | |
2637 | op1 = convert (result_type, op1); | |
2638 | ||
7f506bca | 2639 | arg0 = c_common_get_narrower (op0, &unsigned0); |
2640 | arg1 = c_common_get_narrower (op1, &unsigned1); | |
ab2c1de8 | 2641 | |
2561cea2 | 2642 | /* UNS is 1 if the operation to be done is an unsigned one. */ |
2643 | uns = TYPE_UNSIGNED (result_type); | |
2644 | ||
2645 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
2646 | but it *requires* conversion to FINAL_TYPE. */ | |
48e1416a | 2647 | |
2561cea2 | 2648 | if ((TYPE_PRECISION (TREE_TYPE (op0)) |
2649 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2650 | && TREE_TYPE (op0) != result_type) | |
2651 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
2652 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
2653 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
2654 | && TREE_TYPE (op1) != result_type) | |
2655 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
48e1416a | 2656 | |
2561cea2 | 2657 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ |
48e1416a | 2658 | |
2561cea2 | 2659 | /* For bitwise operations, signedness of nominal type |
2660 | does not matter. Consider only how operands were extended. */ | |
2661 | if (bitwise) | |
2662 | uns = unsigned0; | |
48e1416a | 2663 | |
2561cea2 | 2664 | /* Note that in all three cases below we refrain from optimizing |
2665 | an unsigned operation on sign-extended args. | |
2666 | That would not be valid. */ | |
48e1416a | 2667 | |
2561cea2 | 2668 | /* Both args variable: if both extended in same way |
2669 | from same width, do it in that width. | |
2670 | Do it unsigned if args were zero-extended. */ | |
2671 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
2672 | < TYPE_PRECISION (result_type)) | |
2673 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2674 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2675 | && unsigned0 == unsigned1 | |
2676 | && (unsigned0 || !uns)) | |
2677 | return c_common_signed_or_unsigned_type | |
2678 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
2679 | ||
2680 | else if (TREE_CODE (arg0) == INTEGER_CST | |
2681 | && (unsigned1 || !uns) | |
2682 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2683 | < TYPE_PRECISION (result_type)) | |
2684 | && (type | |
2685 | = c_common_signed_or_unsigned_type (unsigned1, | |
2686 | TREE_TYPE (arg1))) | |
2687 | && !POINTER_TYPE_P (type) | |
2688 | && int_fits_type_p (arg0, type)) | |
2689 | return type; | |
2690 | ||
2691 | else if (TREE_CODE (arg1) == INTEGER_CST | |
2692 | && (unsigned0 || !uns) | |
2693 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
2694 | < TYPE_PRECISION (result_type)) | |
2695 | && (type | |
2696 | = c_common_signed_or_unsigned_type (unsigned0, | |
2697 | TREE_TYPE (arg0))) | |
2698 | && !POINTER_TYPE_P (type) | |
2699 | && int_fits_type_p (arg1, type)) | |
2700 | return type; | |
2701 | ||
2702 | return result_type; | |
2703 | } | |
2704 | ||
e53013a8 | 2705 | /* Returns true iff any integer value of type FROM_TYPE can be represented as |
2706 | real of type TO_TYPE. This is a helper function for unsafe_conversion_p. */ | |
2707 | ||
2708 | static bool | |
2709 | int_safely_convertible_to_real_p (const_tree from_type, const_tree to_type) | |
2710 | { | |
2711 | tree type_low_bound = TYPE_MIN_VALUE (from_type); | |
2712 | tree type_high_bound = TYPE_MAX_VALUE (from_type); | |
2713 | REAL_VALUE_TYPE real_low_bound = | |
2714 | real_value_from_int_cst (0, type_low_bound); | |
2715 | REAL_VALUE_TYPE real_high_bound = | |
2716 | real_value_from_int_cst (0, type_high_bound); | |
2717 | ||
2718 | return exact_real_truncate (TYPE_MODE (to_type), &real_low_bound) | |
2719 | && exact_real_truncate (TYPE_MODE (to_type), &real_high_bound); | |
2720 | } | |
2721 | ||
2722 | /* Checks if expression EXPR of complex/real/integer type cannot be converted | |
2723 | to the complex/real/integer type TYPE. Function returns non-zero when: | |
22a75734 | 2724 | * EXPR is a constant which cannot be exactly converted to TYPE. |
2725 | * EXPR is not a constant and size of EXPR's type > than size of TYPE, | |
e53013a8 | 2726 | for EXPR type and TYPE being both integers or both real, or both |
2727 | complex. | |
2728 | * EXPR is not a constant of complex type and TYPE is a real or | |
2729 | an integer. | |
22a75734 | 2730 | * EXPR is not a constant of real type and TYPE is an integer. |
2731 | * EXPR is not a constant of integer type which cannot be | |
2732 | exactly converted to real type. | |
e53013a8 | 2733 | |
7dfa155b | 2734 | Function allows conversions between types of different signedness and |
ca9d7d74 | 2735 | can return SAFE_CONVERSION (zero) in that case. Function can produce |
e53013a8 | 2736 | signedness warnings if PRODUCE_WARNS is true. |
2737 | ||
2738 | Function allows conversions from complex constants to non-complex types, | |
2739 | provided that imaginary part is zero and real part can be safely converted | |
2740 | to TYPE. */ | |
22a75734 | 2741 | |
ca9d7d74 | 2742 | enum conversion_safety |
22a75734 | 2743 | unsafe_conversion_p (location_t loc, tree type, tree expr, bool produce_warns) |
d31d55f0 | 2744 | { |
ca9d7d74 | 2745 | enum conversion_safety give_warning = SAFE_CONVERSION; /* is 0 or false */ |
27259707 | 2746 | tree expr_type = TREE_TYPE (expr); |
22a75734 | 2747 | loc = expansion_point_location_if_in_system_header (loc); |
d31d55f0 | 2748 | |
7dfa155b | 2749 | if (TREE_CODE (expr) == REAL_CST || TREE_CODE (expr) == INTEGER_CST) |
5b16c152 | 2750 | { |
e53013a8 | 2751 | /* If type is complex, we are interested in compatibility with |
2752 | underlying type. */ | |
2753 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
2754 | type = TREE_TYPE (type); | |
2755 | ||
d31d55f0 | 2756 | /* Warn for real constant that is not an exact integer converted |
7dfa155b | 2757 | to integer type. */ |
27259707 | 2758 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2759 | && TREE_CODE (type) == INTEGER_TYPE) |
2760 | { | |
2761 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) | |
ca9d7d74 | 2762 | give_warning = UNSAFE_REAL; |
7dfa155b | 2763 | } |
da1fb07b | 2764 | /* Warn for an integer constant that does not fit into integer type. */ |
27259707 | 2765 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2766 | && TREE_CODE (type) == INTEGER_TYPE |
2767 | && !int_fits_type_p (expr, type)) | |
2768 | { | |
2769 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) | |
27259707 | 2770 | && tree_int_cst_sgn (expr) < 0) |
7dfa155b | 2771 | { |
2772 | if (produce_warns) | |
2773 | warning_at (loc, OPT_Wsign_conversion, "negative integer" | |
2774 | " implicitly converted to unsigned type"); | |
2775 | } | |
2776 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) | |
2777 | { | |
2778 | if (produce_warns) | |
2779 | warning_at (loc, OPT_Wsign_conversion, "conversion of unsigned" | |
2780 | " constant value to negative integer"); | |
2781 | } | |
7ee0d227 | 2782 | else |
ca9d7d74 | 2783 | give_warning = UNSAFE_OTHER; |
7dfa155b | 2784 | } |
d31d55f0 | 2785 | else if (TREE_CODE (type) == REAL_TYPE) |
7dfa155b | 2786 | { |
2787 | /* Warn for an integer constant that does not fit into real type. */ | |
2788 | if (TREE_CODE (expr_type) == INTEGER_TYPE) | |
2789 | { | |
2790 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
2791 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 2792 | give_warning = UNSAFE_REAL; |
7dfa155b | 2793 | } |
2794 | /* Warn for a real constant that does not fit into a smaller | |
2795 | real type. */ | |
2796 | else if (TREE_CODE (expr_type) == REAL_TYPE | |
2797 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
2798 | { | |
2799 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
2800 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 2801 | give_warning = UNSAFE_REAL; |
7dfa155b | 2802 | } |
2803 | } | |
2804 | } | |
e53013a8 | 2805 | |
2806 | else if (TREE_CODE (expr) == COMPLEX_CST) | |
2807 | { | |
2808 | tree imag_part = TREE_IMAGPART (expr); | |
2809 | /* Conversion from complex constant with zero imaginary part, | |
2810 | perform check for conversion of real part. */ | |
2811 | if ((TREE_CODE (imag_part) == REAL_CST | |
2812 | && real_zerop (imag_part)) | |
2813 | || (TREE_CODE (imag_part) == INTEGER_CST | |
2814 | && integer_zerop (imag_part))) | |
2815 | /* Note: in this branch we use recursive call to unsafe_conversion_p | |
2816 | with different type of EXPR, but it is still safe, because when EXPR | |
2817 | is a constant, it's type is not used in text of generated warnings | |
2818 | (otherwise they could sound misleading). */ | |
2819 | return unsafe_conversion_p (loc, type, TREE_REALPART (expr), | |
2820 | produce_warns); | |
2821 | /* Conversion from complex constant with non-zero imaginary part. */ | |
2822 | else | |
2823 | { | |
2824 | /* Conversion to complex type. | |
2825 | Perform checks for both real and imaginary parts. */ | |
2826 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
2827 | { | |
2828 | /* Unfortunately, produce_warns must be false in two subsequent | |
2829 | calls of unsafe_conversion_p, because otherwise we could | |
2830 | produce strange "double" warnings, if both real and imaginary | |
2831 | parts have conversion problems related to signedness. | |
2832 | ||
2833 | For example: | |
2834 | int32_t _Complex a = 0x80000000 + 0x80000000i; | |
2835 | ||
2836 | Possible solution: add a separate function for checking | |
2837 | constants and combine result of two calls appropriately. */ | |
2838 | enum conversion_safety re_safety = | |
2839 | unsafe_conversion_p (loc, type, TREE_REALPART (expr), false); | |
2840 | enum conversion_safety im_safety = | |
2841 | unsafe_conversion_p (loc, type, imag_part, false); | |
2842 | ||
2843 | /* Merge the results into appropriate single warning. */ | |
2844 | ||
2845 | /* Note: this case includes SAFE_CONVERSION, i.e. success. */ | |
2846 | if (re_safety == im_safety) | |
2847 | give_warning = re_safety; | |
2848 | else if (!re_safety && im_safety) | |
2849 | give_warning = im_safety; | |
2850 | else if (re_safety && !im_safety) | |
2851 | give_warning = re_safety; | |
2852 | else | |
2853 | give_warning = UNSAFE_OTHER; | |
2854 | } | |
2855 | /* Warn about conversion from complex to real or integer type. */ | |
2856 | else | |
2857 | give_warning = UNSAFE_IMAGINARY; | |
2858 | } | |
2859 | } | |
2860 | ||
2861 | /* Checks for remaining case: EXPR is not constant. */ | |
7dfa155b | 2862 | else |
2863 | { | |
d31d55f0 | 2864 | /* Warn for real types converted to integer types. */ |
2561cea2 | 2865 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2866 | && TREE_CODE (type) == INTEGER_TYPE) |
ca9d7d74 | 2867 | give_warning = UNSAFE_REAL; |
d31d55f0 | 2868 | |
2561cea2 | 2869 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2870 | && TREE_CODE (type) == INTEGER_TYPE) |
2871 | { | |
69609004 | 2872 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
f9d856a4 | 2873 | expr = get_unwidened (expr, 0); |
2561cea2 | 2874 | expr_type = TREE_TYPE (expr); |
69609004 | 2875 | |
2561cea2 | 2876 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
48e1416a | 2877 | if (TREE_CODE (expr) == BIT_AND_EXPR |
7dfa155b | 2878 | || TREE_CODE (expr) == BIT_IOR_EXPR |
2561cea2 | 2879 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
2880 | { | |
27259707 | 2881 | /* If both args were extended from a shortest type, |
2882 | use that type if that is safe. */ | |
48e1416a | 2883 | expr_type = shorten_binary_op (expr_type, |
2884 | TREE_OPERAND (expr, 0), | |
2885 | TREE_OPERAND (expr, 1), | |
2561cea2 | 2886 | /* bitwise */1); |
2887 | ||
2561cea2 | 2888 | if (TREE_CODE (expr) == BIT_AND_EXPR) |
2889 | { | |
2890 | tree op0 = TREE_OPERAND (expr, 0); | |
2891 | tree op1 = TREE_OPERAND (expr, 1); | |
30de145b | 2892 | bool unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
2893 | bool unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
2894 | ||
2895 | /* If one of the operands is a non-negative constant | |
2896 | that fits in the target type, then the type of the | |
2897 | other operand does not matter. */ | |
2561cea2 | 2898 | if ((TREE_CODE (op0) == INTEGER_CST |
2899 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
2900 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
2901 | || (TREE_CODE (op1) == INTEGER_CST | |
27259707 | 2902 | && int_fits_type_p (op1, c_common_signed_type (type)) |
48e1416a | 2903 | && int_fits_type_p (op1, |
27259707 | 2904 | c_common_unsigned_type (type)))) |
ca9d7d74 | 2905 | return SAFE_CONVERSION; |
30de145b | 2906 | /* If constant is unsigned and fits in the target |
2907 | type, then the result will also fit. */ | |
2908 | else if ((TREE_CODE (op0) == INTEGER_CST | |
48e1416a | 2909 | && unsigned0 |
30de145b | 2910 | && int_fits_type_p (op0, type)) |
2911 | || (TREE_CODE (op1) == INTEGER_CST | |
2912 | && unsigned1 | |
2913 | && int_fits_type_p (op1, type))) | |
ca9d7d74 | 2914 | return SAFE_CONVERSION; |
2561cea2 | 2915 | } |
2916 | } | |
7dfa155b | 2917 | /* Warn for integer types converted to smaller integer types. */ |
48e1416a | 2918 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
ca9d7d74 | 2919 | give_warning = UNSAFE_OTHER; |
7ee0d227 | 2920 | |
2921 | /* When they are the same width but different signedness, | |
2922 | then the value may change. */ | |
7dfa155b | 2923 | else if (((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
2561cea2 | 2924 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7ee0d227 | 2925 | /* Even when converted to a bigger type, if the type is |
2926 | unsigned but expr is signed, then negative values | |
2927 | will be changed. */ | |
7dfa155b | 2928 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
2929 | && produce_warns) | |
200dd99c | 2930 | warning_at (loc, OPT_Wsign_conversion, "conversion to %qT from %qT " |
2931 | "may change the sign of the result", | |
2932 | type, expr_type); | |
7dfa155b | 2933 | } |
d31d55f0 | 2934 | |
2935 | /* Warn for integer types converted to real types if and only if | |
7dfa155b | 2936 | all the range of values of the integer type cannot be |
2937 | represented by the real type. */ | |
2561cea2 | 2938 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2939 | && TREE_CODE (type) == REAL_TYPE) |
2940 | { | |
4c2cfa81 | 2941 | /* Don't warn about char y = 0xff; float x = (int) y; */ |
2942 | expr = get_unwidened (expr, 0); | |
2943 | expr_type = TREE_TYPE (expr); | |
2944 | ||
e53013a8 | 2945 | if (!int_safely_convertible_to_real_p (expr_type, type)) |
ca9d7d74 | 2946 | give_warning = UNSAFE_OTHER; |
7dfa155b | 2947 | } |
d31d55f0 | 2948 | |
2949 | /* Warn for real types converted to smaller real types. */ | |
2561cea2 | 2950 | else if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2951 | && TREE_CODE (type) == REAL_TYPE |
2952 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
ca9d7d74 | 2953 | give_warning = UNSAFE_REAL; |
e53013a8 | 2954 | |
2955 | /* Check conversion between two complex types. */ | |
2956 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
2957 | && TREE_CODE (type) == COMPLEX_TYPE) | |
2958 | { | |
2959 | /* Extract underlying types (i.e., type of real and imaginary | |
2960 | parts) of expr_type and type. */ | |
2961 | tree from_type = TREE_TYPE (expr_type); | |
2962 | tree to_type = TREE_TYPE (type); | |
2963 | ||
2964 | /* Warn for real types converted to integer types. */ | |
2965 | if (TREE_CODE (from_type) == REAL_TYPE | |
2966 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
2967 | give_warning = UNSAFE_REAL; | |
2968 | ||
2969 | /* Warn for real types converted to smaller real types. */ | |
2970 | else if (TREE_CODE (from_type) == REAL_TYPE | |
2971 | && TREE_CODE (to_type) == REAL_TYPE | |
2972 | && TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
2973 | give_warning = UNSAFE_REAL; | |
2974 | ||
2975 | /* Check conversion for complex integer types. Here implementation | |
2976 | is simpler than for real-domain integers because it does not | |
2977 | involve sophisticated cases, such as bitmasks, casts, etc. */ | |
2978 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
2979 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
2980 | { | |
2981 | /* Warn for integer types converted to smaller integer types. */ | |
2982 | if (TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
2983 | give_warning = UNSAFE_OTHER; | |
2984 | ||
2985 | /* Check for different signedness, see case for real-domain | |
2986 | integers (above) for a more detailed comment. */ | |
2987 | else if (((TYPE_PRECISION (to_type) == TYPE_PRECISION (from_type) | |
2988 | && TYPE_UNSIGNED (to_type) != TYPE_UNSIGNED (from_type)) | |
2989 | || (TYPE_UNSIGNED (to_type) && !TYPE_UNSIGNED (from_type))) | |
2990 | && produce_warns) | |
2991 | warning_at (loc, OPT_Wsign_conversion, | |
2992 | "conversion to %qT from %qT " | |
2993 | "may change the sign of the result", | |
2994 | type, expr_type); | |
2995 | } | |
2996 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
2997 | && TREE_CODE (to_type) == REAL_TYPE | |
2998 | && !int_safely_convertible_to_real_p (from_type, to_type)) | |
2999 | give_warning = UNSAFE_OTHER; | |
3000 | } | |
3001 | ||
3002 | /* Warn for complex types converted to real or integer types. */ | |
3003 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
3004 | && TREE_CODE (type) != COMPLEX_TYPE) | |
3005 | give_warning = UNSAFE_IMAGINARY; | |
7dfa155b | 3006 | } |
3007 | ||
3008 | return give_warning; | |
3009 | } | |
3010 | ||
3011 | /* Warns if the conversion of EXPR to TYPE may alter a value. | |
3012 | This is a helper function for warnings_for_convert_and_check. */ | |
3013 | ||
3014 | static void | |
22a75734 | 3015 | conversion_warning (location_t loc, tree type, tree expr) |
7dfa155b | 3016 | { |
7dfa155b | 3017 | tree expr_type = TREE_TYPE (expr); |
ca9d7d74 | 3018 | enum conversion_safety conversion_kind; |
d31d55f0 | 3019 | |
ca9d7d74 | 3020 | if (!warn_conversion && !warn_sign_conversion && !warn_float_conversion) |
7dfa155b | 3021 | return; |
d31d55f0 | 3022 | |
ec704957 | 3023 | /* This may happen, because for LHS op= RHS we preevaluate |
3024 | RHS and create C_MAYBE_CONST_EXPR <SAVE_EXPR <RHS>>, which | |
3025 | means we could no longer see the code of the EXPR. */ | |
3026 | if (TREE_CODE (expr) == C_MAYBE_CONST_EXPR) | |
3027 | expr = C_MAYBE_CONST_EXPR_EXPR (expr); | |
3028 | if (TREE_CODE (expr) == SAVE_EXPR) | |
3029 | expr = TREE_OPERAND (expr, 0); | |
3030 | ||
7dfa155b | 3031 | switch (TREE_CODE (expr)) |
3032 | { | |
3033 | case EQ_EXPR: | |
3034 | case NE_EXPR: | |
3035 | case LE_EXPR: | |
3036 | case GE_EXPR: | |
3037 | case LT_EXPR: | |
3038 | case GT_EXPR: | |
3039 | case TRUTH_ANDIF_EXPR: | |
3040 | case TRUTH_ORIF_EXPR: | |
3041 | case TRUTH_AND_EXPR: | |
3042 | case TRUTH_OR_EXPR: | |
3043 | case TRUTH_XOR_EXPR: | |
3044 | case TRUTH_NOT_EXPR: | |
3045 | /* Conversion from boolean to a signed:1 bit-field (which only | |
3046 | can hold the values 0 and -1) doesn't lose information - but | |
3047 | it does change the value. */ | |
3048 | if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type)) | |
3049 | warning_at (loc, OPT_Wconversion, | |
3050 | "conversion to %qT from boolean expression", type); | |
3051 | return; | |
3052 | ||
3053 | case REAL_CST: | |
3054 | case INTEGER_CST: | |
e53013a8 | 3055 | case COMPLEX_CST: |
22a75734 | 3056 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
ca9d7d74 | 3057 | if (conversion_kind == UNSAFE_REAL) |
3058 | warning_at (loc, OPT_Wfloat_conversion, | |
3059 | "conversion to %qT alters %qT constant value", | |
3060 | type, expr_type); | |
3061 | else if (conversion_kind) | |
7dfa155b | 3062 | warning_at (loc, OPT_Wconversion, |
3063 | "conversion to %qT alters %qT constant value", | |
3064 | type, expr_type); | |
3065 | return; | |
3066 | ||
3067 | case COND_EXPR: | |
3068 | { | |
0e4e775a | 3069 | /* In case of COND_EXPR, we do not care about the type of |
3070 | COND_EXPR, only about the conversion of each operand. */ | |
3071 | tree op1 = TREE_OPERAND (expr, 1); | |
3072 | tree op2 = TREE_OPERAND (expr, 2); | |
3073 | ||
22a75734 | 3074 | conversion_warning (loc, type, op1); |
3075 | conversion_warning (loc, type, op2); | |
0e4e775a | 3076 | return; |
7dfa155b | 3077 | } |
3078 | ||
3079 | default: /* 'expr' is not a constant. */ | |
22a75734 | 3080 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
ca9d7d74 | 3081 | if (conversion_kind == UNSAFE_REAL) |
3082 | warning_at (loc, OPT_Wfloat_conversion, | |
3083 | "conversion to %qT from %qT may alter its value", | |
3084 | type, expr_type); | |
e53013a8 | 3085 | else if (conversion_kind == UNSAFE_IMAGINARY) |
3086 | warning_at (loc, OPT_Wconversion, | |
3087 | "conversion to %qT from %qT discards imaginary component", | |
3088 | type, expr_type); | |
ca9d7d74 | 3089 | else if (conversion_kind) |
7dfa155b | 3090 | warning_at (loc, OPT_Wconversion, |
200dd99c | 3091 | "conversion to %qT from %qT may alter its value", |
3092 | type, expr_type); | |
d31d55f0 | 3093 | } |
3094 | } | |
3095 | ||
59dd8856 | 3096 | /* Produce warnings after a conversion. RESULT is the result of |
3097 | converting EXPR to TYPE. This is a helper function for | |
3098 | convert_and_check and cp_convert_and_check. */ | |
2a1736ed | 3099 | |
59dd8856 | 3100 | void |
22a75734 | 3101 | warnings_for_convert_and_check (location_t loc, tree type, tree expr, |
3102 | tree result) | |
2a1736ed | 3103 | { |
22a75734 | 3104 | loc = expansion_point_location_if_in_system_header (loc); |
61f69bc9 | 3105 | |
da1fb07b | 3106 | if (TREE_CODE (expr) == INTEGER_CST |
3107 | && (TREE_CODE (type) == INTEGER_TYPE | |
3108 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
3109 | && !int_fits_type_p (expr, type)) | |
3110 | { | |
d31d55f0 | 3111 | /* Do not diagnose overflow in a constant expression merely |
3112 | because a conversion overflowed. */ | |
da1fb07b | 3113 | if (TREE_OVERFLOW (result)) |
eddad94a | 3114 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
3115 | ||
da1fb07b | 3116 | if (TYPE_UNSIGNED (type)) |
d31d55f0 | 3117 | { |
da1fb07b | 3118 | /* This detects cases like converting -129 or 256 to |
3119 | unsigned char. */ | |
3120 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
61f69bc9 | 3121 | warning_at (loc, OPT_Woverflow, |
3122 | "large integer implicitly truncated to unsigned type"); | |
7ee0d227 | 3123 | else |
22a75734 | 3124 | conversion_warning (loc, type, expr); |
da1fb07b | 3125 | } |
48e1416a | 3126 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
22a75734 | 3127 | warning_at (loc, OPT_Woverflow, |
e0913805 | 3128 | "overflow in implicit constant conversion"); |
3129 | /* No warning for converting 0x80000000 to int. */ | |
3130 | else if (pedantic | |
3131 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
3132 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
3133 | != TYPE_PRECISION (type))) | |
61f69bc9 | 3134 | warning_at (loc, OPT_Woverflow, |
3135 | "overflow in implicit constant conversion"); | |
e0913805 | 3136 | |
7ee0d227 | 3137 | else |
22a75734 | 3138 | conversion_warning (loc, type, expr); |
2a1736ed | 3139 | } |
9421ebb9 | 3140 | else if ((TREE_CODE (result) == INTEGER_CST |
3141 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
61f69bc9 | 3142 | warning_at (loc, OPT_Woverflow, |
3143 | "overflow in implicit constant conversion"); | |
7ee0d227 | 3144 | else |
22a75734 | 3145 | conversion_warning (loc, type, expr); |
59dd8856 | 3146 | } |
3147 | ||
3148 | ||
3149 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
3150 | Invoke this function on every expression that is converted implicitly, | |
3151 | i.e. because of language rules and not because of an explicit cast. */ | |
3152 | ||
3153 | tree | |
22a75734 | 3154 | convert_and_check (location_t loc, tree type, tree expr) |
59dd8856 | 3155 | { |
3156 | tree result; | |
c6418a4e | 3157 | tree expr_for_warning; |
3158 | ||
3159 | /* Convert from a value with possible excess precision rather than | |
3160 | via the semantic type, but do not warn about values not fitting | |
3161 | exactly in the semantic type. */ | |
3162 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
3163 | { | |
3164 | tree orig_type = TREE_TYPE (expr); | |
3165 | expr = TREE_OPERAND (expr, 0); | |
3166 | expr_for_warning = convert (orig_type, expr); | |
3167 | if (orig_type == type) | |
3168 | return expr_for_warning; | |
3169 | } | |
3170 | else | |
3171 | expr_for_warning = expr; | |
59dd8856 | 3172 | |
3173 | if (TREE_TYPE (expr) == type) | |
3174 | return expr; | |
48e1416a | 3175 | |
59dd8856 | 3176 | result = convert (type, expr); |
3177 | ||
48d94ede | 3178 | if (c_inhibit_evaluation_warnings == 0 |
3179 | && !TREE_OVERFLOW_P (expr) | |
3180 | && result != error_mark_node) | |
22a75734 | 3181 | warnings_for_convert_and_check (loc, type, expr_for_warning, result); |
59dd8856 | 3182 | |
da1fb07b | 3183 | return result; |
b2806639 | 3184 | } |
3185 | \f | |
4e91a871 | 3186 | /* A node in a list that describes references to variables (EXPR), which are |
3187 | either read accesses if WRITER is zero, or write accesses, in which case | |
3188 | WRITER is the parent of EXPR. */ | |
3189 | struct tlist | |
3190 | { | |
3191 | struct tlist *next; | |
3192 | tree expr, writer; | |
3193 | }; | |
3194 | ||
3195 | /* Used to implement a cache the results of a call to verify_tree. We only | |
3196 | use this for SAVE_EXPRs. */ | |
3197 | struct tlist_cache | |
3198 | { | |
3199 | struct tlist_cache *next; | |
3200 | struct tlist *cache_before_sp; | |
3201 | struct tlist *cache_after_sp; | |
3202 | tree expr; | |
481c6ce6 | 3203 | }; |
3204 | ||
4e91a871 | 3205 | /* Obstack to use when allocating tlist structures, and corresponding |
3206 | firstobj. */ | |
3207 | static struct obstack tlist_obstack; | |
3208 | static char *tlist_firstobj = 0; | |
3209 | ||
3210 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
3211 | warnings. */ | |
3212 | static struct tlist *warned_ids; | |
3213 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
3214 | cache the results. */ | |
3215 | static struct tlist_cache *save_expr_cache; | |
3216 | ||
1cae46be | 3217 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
3218 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
3219 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
3220 | static int warning_candidate_p (tree); | |
79973b57 | 3221 | static bool candidate_equal_p (const_tree, const_tree); |
1cae46be | 3222 | static void warn_for_collisions (struct tlist *); |
3223 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
3224 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
481c6ce6 | 3225 | |
4e91a871 | 3226 | /* Create a new struct tlist and fill in its fields. */ |
3227 | static struct tlist * | |
1cae46be | 3228 | new_tlist (struct tlist *next, tree t, tree writer) |
4e91a871 | 3229 | { |
3230 | struct tlist *l; | |
9318f22c | 3231 | l = XOBNEW (&tlist_obstack, struct tlist); |
4e91a871 | 3232 | l->next = next; |
3233 | l->expr = t; | |
3234 | l->writer = writer; | |
3235 | return l; | |
3236 | } | |
3237 | ||
3238 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
3239 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
3240 | ||
3241 | static void | |
1cae46be | 3242 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
4e91a871 | 3243 | { |
3244 | while (add) | |
3245 | { | |
3246 | struct tlist *next = add->next; | |
84166705 | 3247 | if (!copy) |
4e91a871 | 3248 | add->next = *to; |
79973b57 | 3249 | if (!exclude_writer || !candidate_equal_p (add->writer, exclude_writer)) |
4e91a871 | 3250 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
3251 | add = next; | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
3256 | each variable that already exists in TO, no new node is added; however if | |
3257 | there is a write access recorded in ADD, and an occurrence on TO is only | |
3258 | a read access, then the occurrence in TO will be modified to record the | |
3259 | write. */ | |
481c6ce6 | 3260 | |
3261 | static void | |
1cae46be | 3262 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
4e91a871 | 3263 | { |
3264 | struct tlist **end = to; | |
3265 | ||
3266 | while (*end) | |
3267 | end = &(*end)->next; | |
3268 | ||
3269 | while (add) | |
3270 | { | |
3271 | int found = 0; | |
3272 | struct tlist *tmp2; | |
3273 | struct tlist *next = add->next; | |
3274 | ||
3275 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
79973b57 | 3276 | if (candidate_equal_p (tmp2->expr, add->expr)) |
4e91a871 | 3277 | { |
3278 | found = 1; | |
84166705 | 3279 | if (!tmp2->writer) |
4e91a871 | 3280 | tmp2->writer = add->writer; |
3281 | } | |
84166705 | 3282 | if (!found) |
4e91a871 | 3283 | { |
312243bb | 3284 | *end = copy ? new_tlist (NULL, add->expr, add->writer) : add; |
4e91a871 | 3285 | end = &(*end)->next; |
3286 | *end = 0; | |
3287 | } | |
3288 | add = next; | |
3289 | } | |
3290 | } | |
3291 | ||
3292 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
3293 | references in list LIST conflict with it, excluding reads if ONLY writers | |
3294 | is nonzero. */ | |
3295 | ||
3296 | static void | |
1cae46be | 3297 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
3298 | int only_writes) | |
4e91a871 | 3299 | { |
3300 | struct tlist *tmp; | |
3301 | ||
3302 | /* Avoid duplicate warnings. */ | |
3303 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
79973b57 | 3304 | if (candidate_equal_p (tmp->expr, written)) |
4e91a871 | 3305 | return; |
3306 | ||
3307 | while (list) | |
3308 | { | |
79973b57 | 3309 | if (candidate_equal_p (list->expr, written) |
3310 | && !candidate_equal_p (list->writer, writer) | |
3311 | && (!only_writes || list->writer)) | |
4e91a871 | 3312 | { |
3313 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
3df42822 | 3314 | warning_at (EXPR_LOC_OR_LOC (writer, input_location), |
6513b50d | 3315 | OPT_Wsequence_point, "operation on %qE may be undefined", |
3316 | list->expr); | |
4e91a871 | 3317 | } |
3318 | list = list->next; | |
3319 | } | |
3320 | } | |
3321 | ||
3322 | /* Given a list LIST of references to variables, find whether any of these | |
3323 | can cause conflicts due to missing sequence points. */ | |
3324 | ||
3325 | static void | |
1cae46be | 3326 | warn_for_collisions (struct tlist *list) |
4e91a871 | 3327 | { |
3328 | struct tlist *tmp; | |
1cae46be | 3329 | |
4e91a871 | 3330 | for (tmp = list; tmp; tmp = tmp->next) |
3331 | { | |
3332 | if (tmp->writer) | |
3333 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
3334 | } | |
3335 | } | |
3336 | ||
734c98be | 3337 | /* Return nonzero if X is a tree that can be verified by the sequence point |
4e91a871 | 3338 | warnings. */ |
3339 | static int | |
1cae46be | 3340 | warning_candidate_p (tree x) |
481c6ce6 | 3341 | { |
6ef8d12f | 3342 | if (DECL_P (x) && DECL_ARTIFICIAL (x)) |
3343 | return 0; | |
3344 | ||
027fc6ef | 3345 | if (TREE_CODE (x) == BLOCK) |
3346 | return 0; | |
3347 | ||
6ef8d12f | 3348 | /* VOID_TYPE_P (TREE_TYPE (x)) is workaround for cp/tree.c |
79973b57 | 3349 | (lvalue_p) crash on TRY/CATCH. */ |
6ef8d12f | 3350 | if (TREE_TYPE (x) == NULL_TREE || VOID_TYPE_P (TREE_TYPE (x))) |
3351 | return 0; | |
3352 | ||
3353 | if (!lvalue_p (x)) | |
3354 | return 0; | |
3355 | ||
3356 | /* No point to track non-const calls, they will never satisfy | |
3357 | operand_equal_p. */ | |
3358 | if (TREE_CODE (x) == CALL_EXPR && (call_expr_flags (x) & ECF_CONST) == 0) | |
3359 | return 0; | |
3360 | ||
3361 | if (TREE_CODE (x) == STRING_CST) | |
3362 | return 0; | |
3363 | ||
3364 | return 1; | |
79973b57 | 3365 | } |
3366 | ||
3367 | /* Return nonzero if X and Y appear to be the same candidate (or NULL) */ | |
3368 | static bool | |
3369 | candidate_equal_p (const_tree x, const_tree y) | |
3370 | { | |
3371 | return (x == y) || (x && y && operand_equal_p (x, y, 0)); | |
4e91a871 | 3372 | } |
481c6ce6 | 3373 | |
4e91a871 | 3374 | /* Walk the tree X, and record accesses to variables. If X is written by the |
3375 | parent tree, WRITER is the parent. | |
3376 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
3377 | expression or its only operand forces a sequence point, then everything up | |
3378 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
3379 | in PNO_SP. | |
3380 | Once we return, we will have emitted warnings if any subexpression before | |
3381 | such a sequence point could be undefined. On a higher level, however, the | |
3382 | sequence point may not be relevant, and we'll merge the two lists. | |
3383 | ||
3384 | Example: (b++, a) + b; | |
3385 | The call that processes the COMPOUND_EXPR will store the increment of B | |
3386 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
3387 | processes the PLUS_EXPR will need to merge the two lists so that | |
3388 | eventually, all accesses end up on the same list (and we'll warn about the | |
3389 | unordered subexpressions b++ and b. | |
3390 | ||
3391 | A note on merging. If we modify the former example so that our expression | |
3392 | becomes | |
3393 | (b++, b) + a | |
3394 | care must be taken not simply to add all three expressions into the final | |
3395 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
3396 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
3397 | way, so that no more than one access to B is recorded. */ | |
481c6ce6 | 3398 | |
4e91a871 | 3399 | static void |
1cae46be | 3400 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
3401 | tree writer) | |
4e91a871 | 3402 | { |
3403 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
3404 | enum tree_code code; | |
ce45a448 | 3405 | enum tree_code_class cl; |
481c6ce6 | 3406 | |
e5b75768 | 3407 | /* X may be NULL if it is the operand of an empty statement expression |
3408 | ({ }). */ | |
3409 | if (x == NULL) | |
3410 | return; | |
3411 | ||
4e91a871 | 3412 | restart: |
3413 | code = TREE_CODE (x); | |
e916c70c | 3414 | cl = TREE_CODE_CLASS (code); |
481c6ce6 | 3415 | |
4e91a871 | 3416 | if (warning_candidate_p (x)) |
79973b57 | 3417 | *pno_sp = new_tlist (*pno_sp, x, writer); |
4e91a871 | 3418 | |
3419 | switch (code) | |
3420 | { | |
67b28e3e | 3421 | case CONSTRUCTOR: |
8e71dad2 | 3422 | case SIZEOF_EXPR: |
67b28e3e | 3423 | return; |
3424 | ||
4e91a871 | 3425 | case COMPOUND_EXPR: |
3426 | case TRUTH_ANDIF_EXPR: | |
3427 | case TRUTH_ORIF_EXPR: | |
3428 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3429 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3430 | warn_for_collisions (tmp_nosp); | |
3431 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3432 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
3433 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
3434 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3435 | return; | |
3436 | ||
3437 | case COND_EXPR: | |
3438 | tmp_before = tmp_list2 = 0; | |
3439 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
3440 | warn_for_collisions (tmp_list2); | |
3441 | merge_tlist (pbefore_sp, tmp_before, 0); | |
312243bb | 3442 | merge_tlist (pbefore_sp, tmp_list2, 0); |
4e91a871 | 3443 | |
3444 | tmp_list3 = tmp_nosp = 0; | |
3445 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
3446 | warn_for_collisions (tmp_nosp); | |
3447 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3448 | ||
3449 | tmp_list3 = tmp_list2 = 0; | |
3450 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
3451 | warn_for_collisions (tmp_list2); | |
3452 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3453 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
3454 | two first, to avoid warning for (a ? b++ : b++). */ | |
3455 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
3456 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3457 | return; | |
3458 | ||
481c6ce6 | 3459 | case PREDECREMENT_EXPR: |
3460 | case PREINCREMENT_EXPR: | |
3461 | case POSTDECREMENT_EXPR: | |
3462 | case POSTINCREMENT_EXPR: | |
4e91a871 | 3463 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
3464 | return; | |
3465 | ||
3466 | case MODIFY_EXPR: | |
3467 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3468 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
3469 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
3470 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
3471 | in the RHS. Example: | |
3472 | *a = (a++, 2) | |
3473 | Despite the fact that the modification of "a" is in the before_sp | |
3474 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
3475 | We can handle this by adding the contents of tmp_list3 | |
3476 | to those of tmp_before, and redoing the collision warnings for that | |
3477 | list. */ | |
3478 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
3479 | warn_for_collisions (tmp_before); | |
3480 | /* Exclude the LHS itself here; we first have to merge it into the | |
3481 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
3482 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
3483 | as a write. */ | |
3484 | add_tlist (pno_sp, tmp_list3, x, 0); | |
3485 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
3486 | ||
3487 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3488 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
3489 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
3490 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
3491 | return; | |
481c6ce6 | 3492 | |
3493 | case CALL_EXPR: | |
4e91a871 | 3494 | /* We need to warn about conflicts among arguments and conflicts between |
3495 | args and the function address. Side effects of the function address, | |
3496 | however, are not ordered by the sequence point of the call. */ | |
c2f47e15 | 3497 | { |
3498 | call_expr_arg_iterator iter; | |
3499 | tree arg; | |
48e1416a | 3500 | tmp_before = tmp_nosp = 0; |
c2f47e15 | 3501 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); |
3502 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
3503 | { | |
3504 | tmp_list2 = tmp_list3 = 0; | |
3505 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
3506 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
3507 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
3508 | } | |
3509 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
3510 | warn_for_collisions (tmp_before); | |
3511 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
3512 | return; | |
3513 | } | |
481c6ce6 | 3514 | |
3515 | case TREE_LIST: | |
3516 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
3517 | while (x) | |
3518 | { | |
4e91a871 | 3519 | tmp_before = tmp_nosp = 0; |
3520 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
3521 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3522 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
481c6ce6 | 3523 | x = TREE_CHAIN (x); |
3524 | } | |
4e91a871 | 3525 | return; |
481c6ce6 | 3526 | |
4e91a871 | 3527 | case SAVE_EXPR: |
3528 | { | |
3529 | struct tlist_cache *t; | |
3530 | for (t = save_expr_cache; t; t = t->next) | |
79973b57 | 3531 | if (candidate_equal_p (t->expr, x)) |
4e91a871 | 3532 | break; |
481c6ce6 | 3533 | |
84166705 | 3534 | if (!t) |
481c6ce6 | 3535 | { |
9318f22c | 3536 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
4e91a871 | 3537 | t->next = save_expr_cache; |
3538 | t->expr = x; | |
3539 | save_expr_cache = t; | |
3540 | ||
3541 | tmp_before = tmp_nosp = 0; | |
3542 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3543 | warn_for_collisions (tmp_nosp); | |
3544 | ||
3545 | tmp_list3 = 0; | |
312243bb | 3546 | merge_tlist (&tmp_list3, tmp_nosp, 0); |
4e91a871 | 3547 | t->cache_before_sp = tmp_before; |
3548 | t->cache_after_sp = tmp_list3; | |
481c6ce6 | 3549 | } |
4e91a871 | 3550 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
3551 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
3552 | return; | |
3553 | } | |
481c6ce6 | 3554 | |
012916cb | 3555 | case ADDR_EXPR: |
3556 | x = TREE_OPERAND (x, 0); | |
3557 | if (DECL_P (x)) | |
3558 | return; | |
3559 | writer = 0; | |
3560 | goto restart; | |
3561 | ||
ce45a448 | 3562 | default: |
3563 | /* For other expressions, simply recurse on their operands. | |
a0c938f0 | 3564 | Manual tail recursion for unary expressions. |
ce45a448 | 3565 | Other non-expressions need not be processed. */ |
3566 | if (cl == tcc_unary) | |
3567 | { | |
ce45a448 | 3568 | x = TREE_OPERAND (x, 0); |
3569 | writer = 0; | |
3570 | goto restart; | |
3571 | } | |
3572 | else if (IS_EXPR_CODE_CLASS (cl)) | |
3573 | { | |
3574 | int lp; | |
c2f47e15 | 3575 | int max = TREE_OPERAND_LENGTH (x); |
ce45a448 | 3576 | for (lp = 0; lp < max; lp++) |
3577 | { | |
3578 | tmp_before = tmp_nosp = 0; | |
3579 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
3580 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3581 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3582 | } | |
3583 | } | |
3584 | return; | |
481c6ce6 | 3585 | } |
481c6ce6 | 3586 | } |
3587 | ||
974e2c0c | 3588 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
481c6ce6 | 3589 | points. */ |
3590 | ||
4b987fac | 3591 | DEBUG_FUNCTION void |
1cae46be | 3592 | verify_sequence_points (tree expr) |
481c6ce6 | 3593 | { |
4e91a871 | 3594 | struct tlist *before_sp = 0, *after_sp = 0; |
481c6ce6 | 3595 | |
4e91a871 | 3596 | warned_ids = 0; |
3597 | save_expr_cache = 0; | |
3598 | if (tlist_firstobj == 0) | |
481c6ce6 | 3599 | { |
4e91a871 | 3600 | gcc_obstack_init (&tlist_obstack); |
4fd61bc6 | 3601 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
481c6ce6 | 3602 | } |
3603 | ||
4e91a871 | 3604 | verify_tree (expr, &before_sp, &after_sp, 0); |
3605 | warn_for_collisions (after_sp); | |
3606 | obstack_free (&tlist_obstack, tlist_firstobj); | |
481c6ce6 | 3607 | } |
b0fc3e72 | 3608 | \f |
3609 | /* Validate the expression after `case' and apply default promotions. */ | |
3610 | ||
2ca392fd | 3611 | static tree |
2d2f6a15 | 3612 | check_case_value (location_t loc, tree value) |
b0fc3e72 | 3613 | { |
3614 | if (value == NULL_TREE) | |
3615 | return value; | |
3616 | ||
b96dc121 | 3617 | if (TREE_CODE (value) == INTEGER_CST) |
3618 | /* Promote char or short to int. */ | |
3619 | value = perform_integral_promotions (value); | |
3620 | else if (value != error_mark_node) | |
b0fc3e72 | 3621 | { |
2d2f6a15 | 3622 | error_at (loc, "case label does not reduce to an integer constant"); |
b0fc3e72 | 3623 | value = error_mark_node; |
3624 | } | |
b0fc3e72 | 3625 | |
6433f1c2 | 3626 | constant_expression_warning (value); |
3627 | ||
b0fc3e72 | 3628 | return value; |
3629 | } | |
3630 | \f | |
2ca392fd | 3631 | /* See if the case values LOW and HIGH are in the range of the original |
5c9dae64 | 3632 | type (i.e. before the default conversion to int) of the switch testing |
2ca392fd | 3633 | expression. |
3634 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
91275768 | 3635 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
2ca392fd | 3636 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
3637 | if the case is not a case range. | |
3638 | The caller has to make sure that we are not called with NULL for | |
5c9dae64 | 3639 | CASE_LOW_P (i.e. the default case). |
442e3cb9 | 3640 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
2ca392fd | 3641 | untouched) or false if the label is out of range. */ |
3642 | ||
3643 | static bool | |
f61a9bc2 | 3644 | check_case_bounds (location_t loc, tree type, tree orig_type, |
2ca392fd | 3645 | tree *case_low_p, tree *case_high_p) |
3646 | { | |
3647 | tree min_value, max_value; | |
3648 | tree case_low = *case_low_p; | |
3649 | tree case_high = case_high_p ? *case_high_p : case_low; | |
3650 | ||
3651 | /* If there was a problem with the original type, do nothing. */ | |
3652 | if (orig_type == error_mark_node) | |
3653 | return true; | |
3654 | ||
3655 | min_value = TYPE_MIN_VALUE (orig_type); | |
3656 | max_value = TYPE_MAX_VALUE (orig_type); | |
3657 | ||
3658 | /* Case label is less than minimum for type. */ | |
3659 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
3660 | && tree_int_cst_compare (case_high, min_value) < 0) | |
3661 | { | |
f61a9bc2 | 3662 | warning_at (loc, 0, "case label value is less than minimum value " |
3663 | "for type"); | |
2ca392fd | 3664 | return false; |
3665 | } | |
b27ac6b5 | 3666 | |
2ca392fd | 3667 | /* Case value is greater than maximum for type. */ |
3668 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
3669 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3670 | { | |
f61a9bc2 | 3671 | warning_at (loc, 0, "case label value exceeds maximum value for type"); |
2ca392fd | 3672 | return false; |
3673 | } | |
3674 | ||
3675 | /* Saturate lower case label value to minimum. */ | |
3676 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
3677 | && tree_int_cst_compare (case_low, min_value) < 0) | |
3678 | { | |
f61a9bc2 | 3679 | warning_at (loc, 0, "lower value in case label range" |
3680 | " less than minimum value for type"); | |
2ca392fd | 3681 | case_low = min_value; |
3682 | } | |
b27ac6b5 | 3683 | |
2ca392fd | 3684 | /* Saturate upper case label value to maximum. */ |
3685 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
3686 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3687 | { | |
f61a9bc2 | 3688 | warning_at (loc, 0, "upper value in case label range" |
3689 | " exceeds maximum value for type"); | |
2ca392fd | 3690 | case_high = max_value; |
3691 | } | |
3692 | ||
3693 | if (*case_low_p != case_low) | |
3694 | *case_low_p = convert (type, case_low); | |
3695 | if (case_high_p && *case_high_p != case_high) | |
3696 | *case_high_p = convert (type, case_high); | |
3697 | ||
3698 | return true; | |
3699 | } | |
3700 | \f | |
b0fc3e72 | 3701 | /* Return an integer type with BITS bits of precision, |
3702 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
3703 | ||
3704 | tree | |
1cae46be | 3705 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b0fc3e72 | 3706 | { |
9f75f026 | 3707 | int i; |
3708 | ||
46375237 | 3709 | if (bits == TYPE_PRECISION (integer_type_node)) |
3710 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3711 | ||
bacde65a | 3712 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b0fc3e72 | 3713 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
3714 | ||
bacde65a | 3715 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b0fc3e72 | 3716 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
3717 | ||
bacde65a | 3718 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b0fc3e72 | 3719 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
3720 | ||
bacde65a | 3721 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b0fc3e72 | 3722 | return (unsignedp ? long_long_unsigned_type_node |
3723 | : long_long_integer_type_node); | |
3724 | ||
9f75f026 | 3725 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
3726 | if (int_n_enabled_p[i] | |
3727 | && bits == int_n_data[i].bitsize) | |
3728 | return (unsignedp ? int_n_trees[i].unsigned_type | |
3729 | : int_n_trees[i].signed_type); | |
6388cfe2 | 3730 | |
f57fa2ea | 3731 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
3732 | return (unsignedp ? widest_unsigned_literal_type_node | |
3733 | : widest_integer_literal_type_node); | |
3734 | ||
bacde65a | 3735 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
3736 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
3737 | ||
3738 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
3739 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
3740 | ||
3741 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
3742 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
3743 | ||
3744 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
3745 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
3746 | ||
b0fc3e72 | 3747 | return 0; |
3748 | } | |
3749 | ||
9421ebb9 | 3750 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
3751 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
3752 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
3753 | ||
3754 | tree | |
3755 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
3756 | int unsignedp, int satp) | |
3757 | { | |
3754d046 | 3758 | machine_mode mode; |
9421ebb9 | 3759 | if (ibit == 0) |
3760 | mode = unsignedp ? UQQmode : QQmode; | |
3761 | else | |
3762 | mode = unsignedp ? UHAmode : HAmode; | |
3763 | ||
3764 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
3765 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
3766 | break; | |
3767 | ||
3768 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
3769 | { | |
3770 | sorry ("GCC cannot support operators with integer types and " | |
3771 | "fixed-point types that have too many integral and " | |
3772 | "fractional bits together"); | |
3773 | return 0; | |
3774 | } | |
3775 | ||
3776 | return c_common_type_for_mode (mode, satp); | |
3777 | } | |
3778 | ||
5b247e9f | 3779 | /* Used for communication between c_common_type_for_mode and |
3780 | c_register_builtin_type. */ | |
c1917557 | 3781 | tree registered_builtin_types; |
5b247e9f | 3782 | |
b0fc3e72 | 3783 | /* Return a data type that has machine mode MODE. |
3784 | If the mode is an integer, | |
9421ebb9 | 3785 | then UNSIGNEDP selects between signed and unsigned types. |
3786 | If the mode is a fixed-point mode, | |
3787 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b0fc3e72 | 3788 | |
3789 | tree | |
3754d046 | 3790 | c_common_type_for_mode (machine_mode mode, int unsignedp) |
b0fc3e72 | 3791 | { |
5b247e9f | 3792 | tree t; |
9f75f026 | 3793 | int i; |
5b247e9f | 3794 | |
46375237 | 3795 | if (mode == TYPE_MODE (integer_type_node)) |
3796 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3797 | ||
b0fc3e72 | 3798 | if (mode == TYPE_MODE (signed_char_type_node)) |
3799 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3800 | ||
3801 | if (mode == TYPE_MODE (short_integer_type_node)) | |
3802 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3803 | ||
b0fc3e72 | 3804 | if (mode == TYPE_MODE (long_integer_type_node)) |
3805 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3806 | ||
3807 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
3808 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
3809 | ||
9f75f026 | 3810 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
3811 | if (int_n_enabled_p[i] | |
3812 | && mode == int_n_data[i].m) | |
3813 | return (unsignedp ? int_n_trees[i].unsigned_type | |
3814 | : int_n_trees[i].signed_type); | |
6388cfe2 | 3815 | |
f57fa2ea | 3816 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
44e9fa65 | 3817 | return unsignedp ? widest_unsigned_literal_type_node |
4ee9c684 | 3818 | : widest_integer_literal_type_node; |
f57fa2ea | 3819 | |
88ae7f04 | 3820 | if (mode == QImode) |
bacde65a | 3821 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
3822 | ||
88ae7f04 | 3823 | if (mode == HImode) |
bacde65a | 3824 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
3825 | ||
88ae7f04 | 3826 | if (mode == SImode) |
bacde65a | 3827 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
3828 | ||
88ae7f04 | 3829 | if (mode == DImode) |
bacde65a | 3830 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
ab2c1de8 | 3831 | |
cc1cc1c7 | 3832 | #if HOST_BITS_PER_WIDE_INT >= 64 |
6274009c | 3833 | if (mode == TYPE_MODE (intTI_type_node)) |
3834 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
cc1cc1c7 | 3835 | #endif |
6274009c | 3836 | |
b0fc3e72 | 3837 | if (mode == TYPE_MODE (float_type_node)) |
3838 | return float_type_node; | |
3839 | ||
3840 | if (mode == TYPE_MODE (double_type_node)) | |
3841 | return double_type_node; | |
3842 | ||
3843 | if (mode == TYPE_MODE (long_double_type_node)) | |
3844 | return long_double_type_node; | |
3845 | ||
545c2bde | 3846 | if (mode == TYPE_MODE (void_type_node)) |
3847 | return void_type_node; | |
b27ac6b5 | 3848 | |
b0fc3e72 | 3849 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
61b9b73c | 3850 | return (unsignedp |
3851 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3852 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 3853 | |
3854 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
61b9b73c | 3855 | return (unsignedp |
3856 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3857 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 3858 | |
0dfc45b5 | 3859 | if (COMPLEX_MODE_P (mode)) |
3860 | { | |
3754d046 | 3861 | machine_mode inner_mode; |
0dfc45b5 | 3862 | tree inner_type; |
3863 | ||
3864 | if (mode == TYPE_MODE (complex_float_type_node)) | |
3865 | return complex_float_type_node; | |
3866 | if (mode == TYPE_MODE (complex_double_type_node)) | |
3867 | return complex_double_type_node; | |
3868 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
3869 | return complex_long_double_type_node; | |
3870 | ||
3871 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
3872 | return complex_integer_type_node; | |
3873 | ||
3874 | inner_mode = GET_MODE_INNER (mode); | |
3875 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
3876 | if (inner_type != NULL_TREE) | |
3877 | return build_complex_type (inner_type); | |
3878 | } | |
3879 | else if (VECTOR_MODE_P (mode)) | |
4917c376 | 3880 | { |
3754d046 | 3881 | machine_mode inner_mode = GET_MODE_INNER (mode); |
4917c376 | 3882 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); |
3883 | if (inner_type != NULL_TREE) | |
3884 | return build_vector_type_for_mode (inner_type, mode); | |
88ae7f04 | 3885 | } |
e2ea7e3a | 3886 | |
c4503c0a | 3887 | if (mode == TYPE_MODE (dfloat32_type_node)) |
3888 | return dfloat32_type_node; | |
3889 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
3890 | return dfloat64_type_node; | |
3891 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
3892 | return dfloat128_type_node; | |
3893 | ||
9421ebb9 | 3894 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
3895 | { | |
3896 | if (mode == TYPE_MODE (short_fract_type_node)) | |
3897 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
3898 | if (mode == TYPE_MODE (fract_type_node)) | |
3899 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
3900 | if (mode == TYPE_MODE (long_fract_type_node)) | |
3901 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
3902 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
3903 | return unsignedp ? sat_long_long_fract_type_node | |
3904 | : long_long_fract_type_node; | |
3905 | ||
3906 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
3907 | return unsignedp ? sat_unsigned_short_fract_type_node | |
3908 | : unsigned_short_fract_type_node; | |
3909 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
3910 | return unsignedp ? sat_unsigned_fract_type_node | |
3911 | : unsigned_fract_type_node; | |
3912 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
3913 | return unsignedp ? sat_unsigned_long_fract_type_node | |
3914 | : unsigned_long_fract_type_node; | |
3915 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
3916 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
3917 | : unsigned_long_long_fract_type_node; | |
3918 | ||
3919 | if (mode == TYPE_MODE (short_accum_type_node)) | |
3920 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
3921 | if (mode == TYPE_MODE (accum_type_node)) | |
3922 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
3923 | if (mode == TYPE_MODE (long_accum_type_node)) | |
3924 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
3925 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
3926 | return unsignedp ? sat_long_long_accum_type_node | |
3927 | : long_long_accum_type_node; | |
3928 | ||
3929 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
3930 | return unsignedp ? sat_unsigned_short_accum_type_node | |
3931 | : unsigned_short_accum_type_node; | |
3932 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
3933 | return unsignedp ? sat_unsigned_accum_type_node | |
3934 | : unsigned_accum_type_node; | |
3935 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
3936 | return unsignedp ? sat_unsigned_long_accum_type_node | |
3937 | : unsigned_long_accum_type_node; | |
3938 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
3939 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
3940 | : unsigned_long_long_accum_type_node; | |
3941 | ||
3942 | if (mode == QQmode) | |
3943 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
3944 | if (mode == HQmode) | |
3945 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
3946 | if (mode == SQmode) | |
3947 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
3948 | if (mode == DQmode) | |
3949 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
3950 | if (mode == TQmode) | |
3951 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
3952 | ||
3953 | if (mode == UQQmode) | |
3954 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
3955 | if (mode == UHQmode) | |
3956 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
3957 | if (mode == USQmode) | |
3958 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
3959 | if (mode == UDQmode) | |
3960 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
3961 | if (mode == UTQmode) | |
3962 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
3963 | ||
3964 | if (mode == HAmode) | |
3965 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
3966 | if (mode == SAmode) | |
3967 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
3968 | if (mode == DAmode) | |
3969 | return unsignedp ? sat_da_type_node : da_type_node; | |
3970 | if (mode == TAmode) | |
3971 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
3972 | ||
3973 | if (mode == UHAmode) | |
3974 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
3975 | if (mode == USAmode) | |
3976 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
3977 | if (mode == UDAmode) | |
3978 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
3979 | if (mode == UTAmode) | |
3980 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
3981 | } | |
3982 | ||
5b247e9f | 3983 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
baec58e1 | 3984 | if (TYPE_MODE (TREE_VALUE (t)) == mode |
3985 | && !!unsignedp == !!TYPE_UNSIGNED (TREE_VALUE (t))) | |
5b247e9f | 3986 | return TREE_VALUE (t); |
3987 | ||
b0fc3e72 | 3988 | return 0; |
3989 | } | |
20d39783 | 3990 | |
11773141 | 3991 | tree |
3992 | c_common_unsigned_type (tree type) | |
3993 | { | |
3994 | return c_common_signed_or_unsigned_type (1, type); | |
3995 | } | |
3996 | ||
20d39783 | 3997 | /* Return a signed type the same as TYPE in other respects. */ |
3998 | ||
3999 | tree | |
1cae46be | 4000 | c_common_signed_type (tree type) |
20d39783 | 4001 | { |
4070745f | 4002 | return c_common_signed_or_unsigned_type (0, type); |
20d39783 | 4003 | } |
4004 | ||
4005 | /* Return a type the same as TYPE except unsigned or | |
4006 | signed according to UNSIGNEDP. */ | |
4007 | ||
4008 | tree | |
1cae46be | 4009 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
20d39783 | 4010 | { |
7a91101f | 4011 | tree type1; |
9f75f026 | 4012 | int i; |
20d39783 | 4013 | |
7a91101f | 4014 | /* This block of code emulates the behavior of the old |
4015 | c_common_unsigned_type. In particular, it returns | |
4016 | long_unsigned_type_node if passed a long, even when a int would | |
4017 | have the same size. This is necessary for warnings to work | |
4018 | correctly in archs where sizeof(int) == sizeof(long) */ | |
4019 | ||
4020 | type1 = TYPE_MAIN_VARIANT (type); | |
4021 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
4022 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
4023 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
4024 | return unsignedp ? unsigned_type_node : integer_type_node; | |
4025 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
4026 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
4027 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
4028 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
4029 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
4030 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
9f75f026 | 4031 | |
4032 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
4033 | if (int_n_enabled_p[i] | |
4034 | && (type1 == int_n_trees[i].unsigned_type | |
4035 | || type1 == int_n_trees[i].signed_type)) | |
4036 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4037 | : int_n_trees[i].signed_type); | |
4038 | ||
7a91101f | 4039 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) |
4040 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
4041 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
4042 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
4043 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
4044 | #endif | |
4045 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
4046 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
4047 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
4048 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
4049 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
4050 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
4051 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
4052 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
4053 | ||
9f92e1a2 | 4054 | #define C_COMMON_FIXED_TYPES(NAME) \ |
4055 | if (type1 == short_ ## NAME ## _type_node \ | |
4056 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
4057 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
4058 | : short_ ## NAME ## _type_node; \ | |
4059 | if (type1 == NAME ## _type_node \ | |
4060 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
4061 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
4062 | : NAME ## _type_node; \ | |
4063 | if (type1 == long_ ## NAME ## _type_node \ | |
4064 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
4065 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
4066 | : long_ ## NAME ## _type_node; \ | |
4067 | if (type1 == long_long_ ## NAME ## _type_node \ | |
4068 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
4069 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
4070 | : long_long_ ## NAME ## _type_node; | |
4071 | ||
4072 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
4073 | if (type1 == NAME ## _type_node \ | |
4074 | || type1 == u ## NAME ## _type_node) \ | |
4075 | return unsignedp ? u ## NAME ## _type_node \ | |
4076 | : NAME ## _type_node; | |
4077 | ||
4078 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
4079 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
4080 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
4081 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
4082 | : sat_ ## short_ ## NAME ## _type_node; \ | |
4083 | if (type1 == sat_ ## NAME ## _type_node \ | |
4084 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
4085 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
4086 | : sat_ ## NAME ## _type_node; \ | |
4087 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
4088 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
4089 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
4090 | : sat_ ## long_ ## NAME ## _type_node; \ | |
4091 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
4092 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
4093 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
4094 | : sat_ ## long_long_ ## NAME ## _type_node; | |
4095 | ||
4096 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
4097 | if (type1 == sat_ ## NAME ## _type_node \ | |
4098 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
4099 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
4100 | : sat_ ## NAME ## _type_node; | |
4101 | ||
4102 | C_COMMON_FIXED_TYPES (fract); | |
4103 | C_COMMON_FIXED_TYPES_SAT (fract); | |
4104 | C_COMMON_FIXED_TYPES (accum); | |
4105 | C_COMMON_FIXED_TYPES_SAT (accum); | |
4106 | ||
4107 | C_COMMON_FIXED_MODE_TYPES (qq); | |
4108 | C_COMMON_FIXED_MODE_TYPES (hq); | |
4109 | C_COMMON_FIXED_MODE_TYPES (sq); | |
4110 | C_COMMON_FIXED_MODE_TYPES (dq); | |
4111 | C_COMMON_FIXED_MODE_TYPES (tq); | |
4112 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
4113 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
4114 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
4115 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
4116 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
4117 | C_COMMON_FIXED_MODE_TYPES (ha); | |
4118 | C_COMMON_FIXED_MODE_TYPES (sa); | |
4119 | C_COMMON_FIXED_MODE_TYPES (da); | |
4120 | C_COMMON_FIXED_MODE_TYPES (ta); | |
4121 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
4122 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
4123 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
4124 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
9421ebb9 | 4125 | |
4f7f7efd | 4126 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
4127 | the precision; they have precision set to match their range, but | |
4128 | may use a wider mode to match an ABI. If we change modes, we may | |
4129 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
4130 | the precision as well, so as to yield correct results for | |
4131 | bit-field types. C++ does not have these separate bit-field | |
4132 | types, and producing a signed or unsigned variant of an | |
4133 | ENUMERAL_TYPE may cause other problems as well. */ | |
4134 | ||
ac265864 | 4135 | if (!INTEGRAL_TYPE_P (type) |
4136 | || TYPE_UNSIGNED (type) == unsignedp) | |
4137 | return type; | |
4138 | ||
4f7f7efd | 4139 | #define TYPE_OK(node) \ |
4140 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
0c4abe5b | 4141 | && TYPE_PRECISION (type) == TYPE_PRECISION (node)) |
4f7f7efd | 4142 | if (TYPE_OK (signed_char_type_node)) |
20d39783 | 4143 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
4f7f7efd | 4144 | if (TYPE_OK (integer_type_node)) |
20d39783 | 4145 | return unsignedp ? unsigned_type_node : integer_type_node; |
4f7f7efd | 4146 | if (TYPE_OK (short_integer_type_node)) |
20d39783 | 4147 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
4f7f7efd | 4148 | if (TYPE_OK (long_integer_type_node)) |
20d39783 | 4149 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
4f7f7efd | 4150 | if (TYPE_OK (long_long_integer_type_node)) |
20d39783 | 4151 | return (unsignedp ? long_long_unsigned_type_node |
4152 | : long_long_integer_type_node); | |
9f75f026 | 4153 | |
4154 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
4155 | if (int_n_enabled_p[i] | |
4156 | && TYPE_MODE (type) == int_n_data[i].m | |
4157 | && TYPE_PRECISION (type) == int_n_data[i].bitsize) | |
4158 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4159 | : int_n_trees[i].signed_type); | |
4160 | ||
4f7f7efd | 4161 | if (TYPE_OK (widest_integer_literal_type_node)) |
20d39783 | 4162 | return (unsignedp ? widest_unsigned_literal_type_node |
4163 | : widest_integer_literal_type_node); | |
ef11801e | 4164 | |
4165 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
4f7f7efd | 4166 | if (TYPE_OK (intTI_type_node)) |
ef11801e | 4167 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
4168 | #endif | |
4f7f7efd | 4169 | if (TYPE_OK (intDI_type_node)) |
ef11801e | 4170 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
4f7f7efd | 4171 | if (TYPE_OK (intSI_type_node)) |
ef11801e | 4172 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
4f7f7efd | 4173 | if (TYPE_OK (intHI_type_node)) |
ef11801e | 4174 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
4f7f7efd | 4175 | if (TYPE_OK (intQI_type_node)) |
ef11801e | 4176 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
4f7f7efd | 4177 | #undef TYPE_OK |
ef11801e | 4178 | |
0c4abe5b | 4179 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); |
20d39783 | 4180 | } |
b268e47e | 4181 | |
c0e47fd4 | 4182 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
4183 | ||
4184 | tree | |
4185 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
4186 | { | |
9f75f026 | 4187 | int i; |
4188 | ||
c0e47fd4 | 4189 | /* Extended integer types of the same width as a standard type have |
4190 | lesser rank, so those of the same width as int promote to int or | |
4191 | unsigned int and are valid for printf formats expecting int or | |
4192 | unsigned int. To avoid such special cases, avoid creating | |
4193 | extended integer types for bit-fields if a standard integer type | |
4194 | is available. */ | |
4195 | if (width == TYPE_PRECISION (integer_type_node)) | |
4196 | return unsignedp ? unsigned_type_node : integer_type_node; | |
4197 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
4198 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
4199 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
4200 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
4201 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
4202 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
4203 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
4204 | return (unsignedp ? long_long_unsigned_type_node | |
4205 | : long_long_integer_type_node); | |
9f75f026 | 4206 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
4207 | if (int_n_enabled_p[i] | |
4208 | && width == int_n_data[i].bitsize) | |
4209 | return (unsignedp ? int_n_trees[i].unsigned_type | |
4210 | : int_n_trees[i].signed_type); | |
c0e47fd4 | 4211 | return build_nonstandard_integer_type (width, unsignedp); |
4212 | } | |
4213 | ||
b268e47e | 4214 | /* The C version of the register_builtin_type langhook. */ |
4215 | ||
4216 | void | |
4217 | c_register_builtin_type (tree type, const char* name) | |
4218 | { | |
4219 | tree decl; | |
4220 | ||
e60a6f7b | 4221 | decl = build_decl (UNKNOWN_LOCATION, |
4222 | TYPE_DECL, get_identifier (name), type); | |
b268e47e | 4223 | DECL_ARTIFICIAL (decl) = 1; |
4224 | if (!TYPE_NAME (type)) | |
4225 | TYPE_NAME (type) = decl; | |
4226 | pushdecl (decl); | |
5b247e9f | 4227 | |
4228 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
b268e47e | 4229 | } |
a9b9d10c | 4230 | \f |
aff9e656 | 4231 | /* Print an error message for invalid operands to arith operation |
8e70fb09 | 4232 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. |
4233 | LOCATION is the location of the message. */ | |
b0fc3e72 | 4234 | |
4235 | void | |
8e70fb09 | 4236 | binary_op_error (location_t location, enum tree_code code, |
4237 | tree type0, tree type1) | |
b0fc3e72 | 4238 | { |
19cb6b50 | 4239 | const char *opname; |
f03946e4 | 4240 | |
b0fc3e72 | 4241 | switch (code) |
4242 | { | |
b0fc3e72 | 4243 | case PLUS_EXPR: |
4244 | opname = "+"; break; | |
4245 | case MINUS_EXPR: | |
4246 | opname = "-"; break; | |
4247 | case MULT_EXPR: | |
4248 | opname = "*"; break; | |
4249 | case MAX_EXPR: | |
4250 | opname = "max"; break; | |
4251 | case MIN_EXPR: | |
4252 | opname = "min"; break; | |
4253 | case EQ_EXPR: | |
4254 | opname = "=="; break; | |
4255 | case NE_EXPR: | |
4256 | opname = "!="; break; | |
4257 | case LE_EXPR: | |
4258 | opname = "<="; break; | |
4259 | case GE_EXPR: | |
4260 | opname = ">="; break; | |
4261 | case LT_EXPR: | |
4262 | opname = "<"; break; | |
4263 | case GT_EXPR: | |
4264 | opname = ">"; break; | |
4265 | case LSHIFT_EXPR: | |
4266 | opname = "<<"; break; | |
4267 | case RSHIFT_EXPR: | |
4268 | opname = ">>"; break; | |
4269 | case TRUNC_MOD_EXPR: | |
66618a1e | 4270 | case FLOOR_MOD_EXPR: |
b0fc3e72 | 4271 | opname = "%"; break; |
4272 | case TRUNC_DIV_EXPR: | |
66618a1e | 4273 | case FLOOR_DIV_EXPR: |
b0fc3e72 | 4274 | opname = "/"; break; |
4275 | case BIT_AND_EXPR: | |
4276 | opname = "&"; break; | |
4277 | case BIT_IOR_EXPR: | |
4278 | opname = "|"; break; | |
4279 | case TRUTH_ANDIF_EXPR: | |
4280 | opname = "&&"; break; | |
4281 | case TRUTH_ORIF_EXPR: | |
4282 | opname = "||"; break; | |
4283 | case BIT_XOR_EXPR: | |
4284 | opname = "^"; break; | |
31f820d2 | 4285 | default: |
315ba355 | 4286 | gcc_unreachable (); |
b0fc3e72 | 4287 | } |
8e70fb09 | 4288 | error_at (location, |
4289 | "invalid operands to binary %s (have %qT and %qT)", opname, | |
4290 | type0, type1); | |
b0fc3e72 | 4291 | } |
4292 | \f | |
03fe1dc2 | 4293 | /* Given an expression as a tree, return its original type. Do this |
4294 | by stripping any conversion that preserves the sign and precision. */ | |
4295 | static tree | |
4296 | expr_original_type (tree expr) | |
4297 | { | |
4298 | STRIP_SIGN_NOPS (expr); | |
4299 | return TREE_TYPE (expr); | |
4300 | } | |
4301 | ||
b0fc3e72 | 4302 | /* Subroutine of build_binary_op, used for comparison operations. |
4303 | See if the operands have both been converted from subword integer types | |
4304 | and, if so, perhaps change them both back to their original type. | |
5b511807 | 4305 | This function is also responsible for converting the two operands |
4306 | to the proper common type for comparison. | |
b0fc3e72 | 4307 | |
4308 | The arguments of this function are all pointers to local variables | |
4309 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
4310 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
4311 | ||
2623625f | 4312 | LOC is the location of the comparison. |
4313 | ||
b0fc3e72 | 4314 | If this function returns nonzero, it means that the comparison has |
4315 | a constant value. What this function returns is an expression for | |
4316 | that value. */ | |
4317 | ||
4318 | tree | |
2623625f | 4319 | shorten_compare (location_t loc, tree *op0_ptr, tree *op1_ptr, |
4320 | tree *restype_ptr, enum tree_code *rescode_ptr) | |
b0fc3e72 | 4321 | { |
19cb6b50 | 4322 | tree type; |
b0fc3e72 | 4323 | tree op0 = *op0_ptr; |
4324 | tree op1 = *op1_ptr; | |
4325 | int unsignedp0, unsignedp1; | |
4326 | int real1, real2; | |
4327 | tree primop0, primop1; | |
4328 | enum tree_code code = *rescode_ptr; | |
4329 | ||
4330 | /* Throw away any conversions to wider types | |
4331 | already present in the operands. */ | |
4332 | ||
7f506bca | 4333 | primop0 = c_common_get_narrower (op0, &unsignedp0); |
4334 | primop1 = c_common_get_narrower (op1, &unsignedp1); | |
b0fc3e72 | 4335 | |
119d06b2 | 4336 | /* If primopN is first sign-extended from primopN's precision to opN's |
4337 | precision, then zero-extended from opN's precision to | |
4338 | *restype_ptr precision, shortenings might be invalid. */ | |
4339 | if (TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (TREE_TYPE (op0)) | |
4340 | && TYPE_PRECISION (TREE_TYPE (op0)) < TYPE_PRECISION (*restype_ptr) | |
4341 | && !unsignedp0 | |
4342 | && TYPE_UNSIGNED (TREE_TYPE (op0))) | |
4343 | primop0 = op0; | |
4344 | if (TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (TREE_TYPE (op1)) | |
4345 | && TYPE_PRECISION (TREE_TYPE (op1)) < TYPE_PRECISION (*restype_ptr) | |
4346 | && !unsignedp1 | |
4347 | && TYPE_UNSIGNED (TREE_TYPE (op1))) | |
4348 | primop1 = op1; | |
4349 | ||
b0fc3e72 | 4350 | /* Handle the case that OP0 does not *contain* a conversion |
4351 | but it *requires* conversion to FINAL_TYPE. */ | |
4352 | ||
4353 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
78a8ed03 | 4354 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b0fc3e72 | 4355 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
78a8ed03 | 4356 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b0fc3e72 | 4357 | |
4358 | /* If one of the operands must be floated, we cannot optimize. */ | |
4359 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
4360 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
ab2c1de8 | 4361 | |
b0fc3e72 | 4362 | /* If first arg is constant, swap the args (changing operation |
2bd278cc | 4363 | so value is preserved), for canonicalization. Don't do this if |
4364 | the second arg is 0. */ | |
b0fc3e72 | 4365 | |
2bd278cc | 4366 | if (TREE_CONSTANT (primop0) |
9421ebb9 | 4367 | && !integer_zerop (primop1) && !real_zerop (primop1) |
4368 | && !fixed_zerop (primop1)) | |
b0fc3e72 | 4369 | { |
dfcf26a5 | 4370 | std::swap (primop0, primop1); |
4371 | std::swap (op0, op1); | |
b0fc3e72 | 4372 | *op0_ptr = op0; |
4373 | *op1_ptr = op1; | |
dfcf26a5 | 4374 | std::swap (unsignedp0, unsignedp1); |
4375 | std::swap (real1, real2); | |
b0fc3e72 | 4376 | |
4377 | switch (code) | |
4378 | { | |
4379 | case LT_EXPR: | |
4380 | code = GT_EXPR; | |
4381 | break; | |
4382 | case GT_EXPR: | |
4383 | code = LT_EXPR; | |
4384 | break; | |
4385 | case LE_EXPR: | |
4386 | code = GE_EXPR; | |
4387 | break; | |
4388 | case GE_EXPR: | |
4389 | code = LE_EXPR; | |
4390 | break; | |
31f820d2 | 4391 | default: |
4392 | break; | |
b0fc3e72 | 4393 | } |
4394 | *rescode_ptr = code; | |
4395 | } | |
4396 | ||
4397 | /* If comparing an integer against a constant more bits wide, | |
4398 | maybe we can deduce a value of 1 or 0 independent of the data. | |
4399 | Or else truncate the constant now | |
4400 | rather than extend the variable at run time. | |
4401 | ||
4402 | This is only interesting if the constant is the wider arg. | |
4403 | Also, it is not safe if the constant is unsigned and the | |
4404 | variable arg is signed, since in this case the variable | |
4405 | would be sign-extended and then regarded as unsigned. | |
4406 | Our technique fails in this case because the lowest/highest | |
4407 | possible unsigned results don't follow naturally from the | |
4408 | lowest/highest possible values of the variable operand. | |
4409 | For just EQ_EXPR and NE_EXPR there is another technique that | |
4410 | could be used: see if the constant can be faithfully represented | |
4411 | in the other operand's type, by truncating it and reextending it | |
4412 | and see if that preserves the constant's value. */ | |
4413 | ||
4414 | if (!real1 && !real2 | |
9421ebb9 | 4415 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b0fc3e72 | 4416 | && TREE_CODE (primop1) == INTEGER_CST |
4417 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
4418 | { | |
4419 | int min_gt, max_gt, min_lt, max_lt; | |
4420 | tree maxval, minval; | |
4421 | /* 1 if comparison is nominally unsigned. */ | |
78a8ed03 | 4422 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b0fc3e72 | 4423 | tree val; |
4424 | ||
4070745f | 4425 | type = c_common_signed_or_unsigned_type (unsignedp0, |
4426 | TREE_TYPE (primop0)); | |
cda09c61 | 4427 | |
b0fc3e72 | 4428 | maxval = TYPE_MAX_VALUE (type); |
4429 | minval = TYPE_MIN_VALUE (type); | |
4430 | ||
4431 | if (unsignedp && !unsignedp0) | |
4070745f | 4432 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b0fc3e72 | 4433 | |
4434 | if (TREE_TYPE (primop1) != *restype_ptr) | |
18dbec6f | 4435 | { |
9a5e8086 | 4436 | /* Convert primop1 to target type, but do not introduce |
4437 | additional overflow. We know primop1 is an int_cst. */ | |
e913b5cd | 4438 | primop1 = force_fit_type (*restype_ptr, |
796b6678 | 4439 | wide_int::from |
4440 | (primop1, | |
4441 | TYPE_PRECISION (*restype_ptr), | |
4442 | TYPE_SIGN (TREE_TYPE (primop1))), | |
e913b5cd | 4443 | 0, TREE_OVERFLOW (primop1)); |
18dbec6f | 4444 | } |
b0fc3e72 | 4445 | if (type != *restype_ptr) |
4446 | { | |
4447 | minval = convert (*restype_ptr, minval); | |
4448 | maxval = convert (*restype_ptr, maxval); | |
4449 | } | |
4450 | ||
d99d10ca | 4451 | min_gt = tree_int_cst_lt (primop1, minval); |
4452 | max_gt = tree_int_cst_lt (primop1, maxval); | |
4453 | min_lt = tree_int_cst_lt (minval, primop1); | |
4454 | max_lt = tree_int_cst_lt (maxval, primop1); | |
b0fc3e72 | 4455 | |
4456 | val = 0; | |
4457 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
4458 | if (code == NE_EXPR) | |
4459 | { | |
4460 | if (max_lt || min_gt) | |
3c2239cf | 4461 | val = truthvalue_true_node; |
b0fc3e72 | 4462 | } |
4463 | else if (code == EQ_EXPR) | |
4464 | { | |
4465 | if (max_lt || min_gt) | |
3c2239cf | 4466 | val = truthvalue_false_node; |
b0fc3e72 | 4467 | } |
4468 | else if (code == LT_EXPR) | |
4469 | { | |
4470 | if (max_lt) | |
3c2239cf | 4471 | val = truthvalue_true_node; |
b0fc3e72 | 4472 | if (!min_lt) |
3c2239cf | 4473 | val = truthvalue_false_node; |
b0fc3e72 | 4474 | } |
4475 | else if (code == GT_EXPR) | |
4476 | { | |
4477 | if (min_gt) | |
3c2239cf | 4478 | val = truthvalue_true_node; |
b0fc3e72 | 4479 | if (!max_gt) |
3c2239cf | 4480 | val = truthvalue_false_node; |
b0fc3e72 | 4481 | } |
4482 | else if (code == LE_EXPR) | |
4483 | { | |
4484 | if (!max_gt) | |
3c2239cf | 4485 | val = truthvalue_true_node; |
b0fc3e72 | 4486 | if (min_gt) |
3c2239cf | 4487 | val = truthvalue_false_node; |
b0fc3e72 | 4488 | } |
4489 | else if (code == GE_EXPR) | |
4490 | { | |
4491 | if (!min_lt) | |
3c2239cf | 4492 | val = truthvalue_true_node; |
b0fc3e72 | 4493 | if (max_lt) |
3c2239cf | 4494 | val = truthvalue_false_node; |
b0fc3e72 | 4495 | } |
4496 | ||
4497 | /* If primop0 was sign-extended and unsigned comparison specd, | |
4498 | we did a signed comparison above using the signed type bounds. | |
4499 | But the comparison we output must be unsigned. | |
4500 | ||
4501 | Also, for inequalities, VAL is no good; but if the signed | |
4502 | comparison had *any* fixed result, it follows that the | |
4503 | unsigned comparison just tests the sign in reverse | |
4504 | (positive values are LE, negative ones GE). | |
4505 | So we can generate an unsigned comparison | |
4506 | against an extreme value of the signed type. */ | |
4507 | ||
4508 | if (unsignedp && !unsignedp0) | |
4509 | { | |
4510 | if (val != 0) | |
4511 | switch (code) | |
4512 | { | |
4513 | case LT_EXPR: | |
4514 | case GE_EXPR: | |
4515 | primop1 = TYPE_MIN_VALUE (type); | |
4516 | val = 0; | |
4517 | break; | |
4518 | ||
4519 | case LE_EXPR: | |
4520 | case GT_EXPR: | |
4521 | primop1 = TYPE_MAX_VALUE (type); | |
4522 | val = 0; | |
4523 | break; | |
31f820d2 | 4524 | |
4525 | default: | |
4526 | break; | |
b0fc3e72 | 4527 | } |
11773141 | 4528 | type = c_common_unsigned_type (type); |
b0fc3e72 | 4529 | } |
4530 | ||
734ec290 | 4531 | if (TREE_CODE (primop0) != INTEGER_CST) |
b0fc3e72 | 4532 | { |
3c2239cf | 4533 | if (val == truthvalue_false_node) |
03fe1dc2 | 4534 | warning_at (loc, OPT_Wtype_limits, |
4535 | "comparison is always false due to limited range of data type"); | |
3c2239cf | 4536 | if (val == truthvalue_true_node) |
03fe1dc2 | 4537 | warning_at (loc, OPT_Wtype_limits, |
4538 | "comparison is always true due to limited range of data type"); | |
b0fc3e72 | 4539 | } |
4540 | ||
4541 | if (val != 0) | |
4542 | { | |
4543 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4544 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 4545 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b0fc3e72 | 4546 | return val; |
4547 | } | |
4548 | ||
4549 | /* Value is not predetermined, but do the comparison | |
4550 | in the type of the operand that is not constant. | |
4551 | TYPE is already properly set. */ | |
4552 | } | |
c4503c0a | 4553 | |
4554 | /* If either arg is decimal float and the other is float, find the | |
4555 | proper common type to use for comparison. */ | |
7fd22aae | 4556 | else if (real1 && real2 |
4557 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
4558 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1)))) | |
4559 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4560 | ||
4561 | /* If either arg is decimal float and the other is float, fail. */ | |
c4503c0a | 4562 | else if (real1 && real2 |
4563 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
4564 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
7fd22aae | 4565 | return 0; |
c4503c0a | 4566 | |
b0fc3e72 | 4567 | else if (real1 && real2 |
2203bd5c | 4568 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
4569 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b0fc3e72 | 4570 | type = TREE_TYPE (primop0); |
4571 | ||
4572 | /* If args' natural types are both narrower than nominal type | |
4573 | and both extend in the same manner, compare them | |
4574 | in the type of the wider arg. | |
4575 | Otherwise must actually extend both to the nominal | |
4576 | common type lest different ways of extending | |
4577 | alter the result. | |
4578 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
4579 | ||
4580 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
4581 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
4582 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
4583 | { | |
4584 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4070745f | 4585 | type = c_common_signed_or_unsigned_type (unsignedp0 |
78a8ed03 | 4586 | || TYPE_UNSIGNED (*restype_ptr), |
4070745f | 4587 | type); |
b0fc3e72 | 4588 | /* Make sure shorter operand is extended the right way |
4589 | to match the longer operand. */ | |
4070745f | 4590 | primop0 |
4591 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
4592 | TREE_TYPE (primop0)), | |
4593 | primop0); | |
4594 | primop1 | |
4595 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
4596 | TREE_TYPE (primop1)), | |
4597 | primop1); | |
b0fc3e72 | 4598 | } |
4599 | else | |
4600 | { | |
4601 | /* Here we must do the comparison on the nominal type | |
4602 | using the args exactly as we received them. */ | |
4603 | type = *restype_ptr; | |
4604 | primop0 = op0; | |
4605 | primop1 = op1; | |
4606 | ||
4607 | if (!real1 && !real2 && integer_zerop (primop1) | |
78a8ed03 | 4608 | && TYPE_UNSIGNED (*restype_ptr)) |
b0fc3e72 | 4609 | { |
4610 | tree value = 0; | |
03fe1dc2 | 4611 | /* All unsigned values are >= 0, so we warn. However, |
4612 | if OP0 is a constant that is >= 0, the signedness of | |
4613 | the comparison isn't an issue, so suppress the | |
4614 | warning. */ | |
4615 | bool warn = | |
3df42822 | 4616 | warn_type_limits && !in_system_header_at (loc) |
03fe1dc2 | 4617 | && !(TREE_CODE (primop0) == INTEGER_CST |
4618 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
4619 | primop0))) | |
4620 | /* Do not warn for enumeration types. */ | |
4621 | && (TREE_CODE (expr_original_type (primop0)) != ENUMERAL_TYPE); | |
4622 | ||
b0fc3e72 | 4623 | switch (code) |
4624 | { | |
4625 | case GE_EXPR: | |
03fe1dc2 | 4626 | if (warn) |
4627 | warning_at (loc, OPT_Wtype_limits, | |
4628 | "comparison of unsigned expression >= 0 is always true"); | |
3c2239cf | 4629 | value = truthvalue_true_node; |
b0fc3e72 | 4630 | break; |
4631 | ||
4632 | case LT_EXPR: | |
03fe1dc2 | 4633 | if (warn) |
4634 | warning_at (loc, OPT_Wtype_limits, | |
4635 | "comparison of unsigned expression < 0 is always false"); | |
3c2239cf | 4636 | value = truthvalue_false_node; |
31f820d2 | 4637 | break; |
4638 | ||
4639 | default: | |
4640 | break; | |
b0fc3e72 | 4641 | } |
4642 | ||
4643 | if (value != 0) | |
4644 | { | |
4645 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4646 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 4647 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
4648 | primop0, value); | |
b0fc3e72 | 4649 | return value; |
4650 | } | |
4651 | } | |
4652 | } | |
4653 | ||
4654 | *op0_ptr = convert (type, primop0); | |
4655 | *op1_ptr = convert (type, primop1); | |
4656 | ||
3c2239cf | 4657 | *restype_ptr = truthvalue_type_node; |
b0fc3e72 | 4658 | |
4659 | return 0; | |
4660 | } | |
4661 | \f | |
1c26100f | 4662 | /* Return a tree for the sum or difference (RESULTCODE says which) |
4663 | of pointer PTROP and integer INTOP. */ | |
4664 | ||
4665 | tree | |
389dd41b | 4666 | pointer_int_sum (location_t loc, enum tree_code resultcode, |
42f9a786 | 4667 | tree ptrop, tree intop, bool complain) |
1c26100f | 4668 | { |
add6ee5e | 4669 | tree size_exp, ret; |
1c26100f | 4670 | |
1c26100f | 4671 | /* The result is a pointer of the same type that is being added. */ |
1c26100f | 4672 | tree result_type = TREE_TYPE (ptrop); |
4673 | ||
4674 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
4675 | { | |
42f9a786 | 4676 | if (complain && warn_pointer_arith) |
4677 | pedwarn (loc, OPT_Wpointer_arith, | |
4678 | "pointer of type %<void *%> used in arithmetic"); | |
4679 | else if (!complain) | |
4680 | return error_mark_node; | |
1c26100f | 4681 | size_exp = integer_one_node; |
4682 | } | |
4683 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
4684 | { | |
42f9a786 | 4685 | if (complain && warn_pointer_arith) |
4686 | pedwarn (loc, OPT_Wpointer_arith, | |
4687 | "pointer to a function used in arithmetic"); | |
4688 | else if (!complain) | |
4689 | return error_mark_node; | |
1c26100f | 4690 | size_exp = integer_one_node; |
4691 | } | |
1c26100f | 4692 | else |
4693 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
4694 | ||
add6ee5e | 4695 | /* We are manipulating pointer values, so we don't need to warn |
4696 | about relying on undefined signed overflow. We disable the | |
4697 | warning here because we use integer types so fold won't know that | |
4698 | they are really pointers. */ | |
4699 | fold_defer_overflow_warnings (); | |
4700 | ||
1c26100f | 4701 | /* If what we are about to multiply by the size of the elements |
4702 | contains a constant term, apply distributive law | |
4703 | and multiply that constant term separately. | |
4704 | This helps produce common subexpressions. */ | |
1c26100f | 4705 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
84166705 | 4706 | && !TREE_CONSTANT (intop) |
1c26100f | 4707 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
4708 | && TREE_CONSTANT (size_exp) | |
4709 | /* If the constant comes from pointer subtraction, | |
4710 | skip this optimization--it would cause an error. */ | |
4711 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
4712 | /* If the constant is unsigned, and smaller than the pointer size, | |
4713 | then we must skip this optimization. This is because it could cause | |
4714 | an overflow error if the constant is negative but INTOP is not. */ | |
84166705 | 4715 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
1c26100f | 4716 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
4717 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
4718 | { | |
4719 | enum tree_code subcode = resultcode; | |
4720 | tree int_type = TREE_TYPE (intop); | |
4721 | if (TREE_CODE (intop) == MINUS_EXPR) | |
4722 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
4723 | /* Convert both subexpression types to the type of intop, | |
4724 | because weird cases involving pointer arithmetic | |
4725 | can result in a sum or difference with different type args. */ | |
8e70fb09 | 4726 | ptrop = build_binary_op (EXPR_LOCATION (TREE_OPERAND (intop, 1)), |
4727 | subcode, ptrop, | |
1c26100f | 4728 | convert (int_type, TREE_OPERAND (intop, 1)), 1); |
4729 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
4730 | } | |
4731 | ||
4732 | /* Convert the integer argument to a type the same size as sizetype | |
4733 | so the multiply won't overflow spuriously. */ | |
1c26100f | 4734 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
78a8ed03 | 4735 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
1cae46be | 4736 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
78a8ed03 | 4737 | TYPE_UNSIGNED (sizetype)), intop); |
1c26100f | 4738 | |
4739 | /* Replace the integer argument with a suitable product by the object size. | |
c6feb9f1 | 4740 | Do this multiplication as signed, then convert to the appropriate type |
8032877c | 4741 | for the pointer operation and disregard an overflow that occurred only |
c6feb9f1 | 4742 | because of the sign-extension change in the latter conversion. */ |
4743 | { | |
4744 | tree t = build_binary_op (loc, | |
4745 | MULT_EXPR, intop, | |
4746 | convert (TREE_TYPE (intop), size_exp), 1); | |
4747 | intop = convert (sizetype, t); | |
4748 | if (TREE_OVERFLOW_P (intop) && !TREE_OVERFLOW (t)) | |
e913b5cd | 4749 | intop = wide_int_to_tree (TREE_TYPE (intop), intop); |
c6feb9f1 | 4750 | } |
0de36bdb | 4751 | |
499e523f | 4752 | /* Create the sum or difference. */ |
0de36bdb | 4753 | if (resultcode == MINUS_EXPR) |
389dd41b | 4754 | intop = fold_build1_loc (loc, NEGATE_EXPR, sizetype, intop); |
1c26100f | 4755 | |
2cc66f2a | 4756 | ret = fold_build_pointer_plus_loc (loc, ptrop, intop); |
add6ee5e | 4757 | |
4758 | fold_undefer_and_ignore_overflow_warnings (); | |
4759 | ||
4760 | return ret; | |
1c26100f | 4761 | } |
4762 | \f | |
f59e3889 | 4763 | /* Wrap a C_MAYBE_CONST_EXPR around an expression that is fully folded |
4764 | and if NON_CONST is known not to be permitted in an evaluated part | |
4765 | of a constant expression. */ | |
4766 | ||
4767 | tree | |
4768 | c_wrap_maybe_const (tree expr, bool non_const) | |
4769 | { | |
4770 | bool nowarning = TREE_NO_WARNING (expr); | |
4771 | location_t loc = EXPR_LOCATION (expr); | |
4772 | ||
4773 | /* This should never be called for C++. */ | |
4774 | if (c_dialect_cxx ()) | |
4775 | gcc_unreachable (); | |
4776 | ||
4777 | /* The result of folding may have a NOP_EXPR to set TREE_NO_WARNING. */ | |
4778 | STRIP_TYPE_NOPS (expr); | |
4779 | expr = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL, expr); | |
4780 | C_MAYBE_CONST_EXPR_NON_CONST (expr) = non_const; | |
4781 | if (nowarning) | |
4782 | TREE_NO_WARNING (expr) = 1; | |
4783 | protected_set_expr_location (expr, loc); | |
4784 | ||
4785 | return expr; | |
4786 | } | |
4787 | ||
a75b1c71 | 4788 | /* Wrap a SAVE_EXPR around EXPR, if appropriate. Like save_expr, but |
4789 | for C folds the inside expression and wraps a C_MAYBE_CONST_EXPR | |
4790 | around the SAVE_EXPR if needed so that c_fully_fold does not need | |
4791 | to look inside SAVE_EXPRs. */ | |
4792 | ||
4793 | tree | |
4794 | c_save_expr (tree expr) | |
4795 | { | |
4796 | bool maybe_const = true; | |
4797 | if (c_dialect_cxx ()) | |
4798 | return save_expr (expr); | |
4799 | expr = c_fully_fold (expr, false, &maybe_const); | |
4800 | expr = save_expr (expr); | |
4801 | if (!maybe_const) | |
f59e3889 | 4802 | expr = c_wrap_maybe_const (expr, true); |
a75b1c71 | 4803 | return expr; |
4804 | } | |
4805 | ||
6b68e71a | 4806 | /* Return whether EXPR is a declaration whose address can never be |
4807 | NULL. */ | |
4808 | ||
4809 | bool | |
9f627b1a | 4810 | decl_with_nonnull_addr_p (const_tree expr) |
6b68e71a | 4811 | { |
4812 | return (DECL_P (expr) | |
4813 | && (TREE_CODE (expr) == PARM_DECL | |
4814 | || TREE_CODE (expr) == LABEL_DECL | |
4815 | || !DECL_WEAK (expr))); | |
4816 | } | |
4817 | ||
b0fc3e72 | 4818 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
45a78cc0 | 4819 | or for an `if' or `while' statement or ?..: exp. It should already |
4820 | have been validated to be of suitable type; otherwise, a bad | |
4821 | diagnostic may result. | |
b0fc3e72 | 4822 | |
8e70fb09 | 4823 | The EXPR is located at LOCATION. |
4824 | ||
b0fc3e72 | 4825 | This preparation consists of taking the ordinary |
4826 | representation of an expression expr and producing a valid tree | |
4827 | boolean expression describing whether expr is nonzero. We could | |
3c2239cf | 4828 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b0fc3e72 | 4829 | but we optimize comparisons, &&, ||, and !. |
4830 | ||
3c2239cf | 4831 | The resulting type should always be `truthvalue_type_node'. */ |
b0fc3e72 | 4832 | |
4833 | tree | |
8e70fb09 | 4834 | c_common_truthvalue_conversion (location_t location, tree expr) |
b0fc3e72 | 4835 | { |
b0fc3e72 | 4836 | switch (TREE_CODE (expr)) |
4837 | { | |
318a728f | 4838 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
e1232ce2 | 4839 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
4840 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
4841 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
ce04dcdc | 4842 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4843 | return expr; | |
e60a6f7b | 4844 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
ce04dcdc | 4845 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); |
e60a6f7b | 4846 | goto ret; |
ce04dcdc | 4847 | |
b0fc3e72 | 4848 | case TRUTH_ANDIF_EXPR: |
4849 | case TRUTH_ORIF_EXPR: | |
4850 | case TRUTH_AND_EXPR: | |
4851 | case TRUTH_OR_EXPR: | |
31f6e93c | 4852 | case TRUTH_XOR_EXPR: |
ce04dcdc | 4853 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4854 | return expr; | |
e60a6f7b | 4855 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
48e1416a | 4856 | c_common_truthvalue_conversion (location, |
e60a6f7b | 4857 | TREE_OPERAND (expr, 0)), |
4858 | c_common_truthvalue_conversion (location, | |
4859 | TREE_OPERAND (expr, 1))); | |
4860 | goto ret; | |
3e851b85 | 4861 | |
f6e28f72 | 4862 | case TRUTH_NOT_EXPR: |
ce04dcdc | 4863 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4864 | return expr; | |
e60a6f7b | 4865 | expr = build1 (TREE_CODE (expr), truthvalue_type_node, |
4866 | c_common_truthvalue_conversion (location, | |
4867 | TREE_OPERAND (expr, 0))); | |
4868 | goto ret; | |
f6e28f72 | 4869 | |
b0fc3e72 | 4870 | case ERROR_MARK: |
4871 | return expr; | |
ab2c1de8 | 4872 | |
b0fc3e72 | 4873 | case INTEGER_CST: |
eddad94a | 4874 | return integer_zerop (expr) ? truthvalue_false_node |
4875 | : truthvalue_true_node; | |
b0fc3e72 | 4876 | |
4877 | case REAL_CST: | |
5000e21c | 4878 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
4879 | ? truthvalue_true_node | |
4880 | : truthvalue_false_node; | |
b0fc3e72 | 4881 | |
9421ebb9 | 4882 | case FIXED_CST: |
4883 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
4884 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
4885 | ? truthvalue_true_node | |
4886 | : truthvalue_false_node; | |
4887 | ||
ce04dcdc | 4888 | case FUNCTION_DECL: |
b6889cb0 | 4889 | expr = build_unary_op (location, ADDR_EXPR, expr, 0); |
ce04dcdc | 4890 | /* Fall through. */ |
4891 | ||
b0fc3e72 | 4892 | case ADDR_EXPR: |
ce871053 | 4893 | { |
ee7d4d6a | 4894 | tree inner = TREE_OPERAND (expr, 0); |
6b68e71a | 4895 | if (decl_with_nonnull_addr_p (inner)) |
ce871053 | 4896 | { |
6b68e71a | 4897 | /* Common Ada/Pascal programmer's mistake. */ |
8e70fb09 | 4898 | warning_at (location, |
4899 | OPT_Waddress, | |
4900 | "the address of %qD will always evaluate as %<true%>", | |
4901 | inner); | |
ce871053 | 4902 | return truthvalue_true_node; |
4903 | } | |
d473d901 | 4904 | break; |
ce871053 | 4905 | } |
b0fc3e72 | 4906 | |
2203bd5c | 4907 | case COMPLEX_EXPR: |
e60a6f7b | 4908 | expr = build_binary_op (EXPR_LOCATION (expr), |
8e70fb09 | 4909 | (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
95809de4 | 4910 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
8e70fb09 | 4911 | c_common_truthvalue_conversion (location, |
4912 | TREE_OPERAND (expr, 0)), | |
4913 | c_common_truthvalue_conversion (location, | |
4914 | TREE_OPERAND (expr, 1)), | |
2203bd5c | 4915 | 0); |
e60a6f7b | 4916 | goto ret; |
2203bd5c | 4917 | |
b0fc3e72 | 4918 | case NEGATE_EXPR: |
4919 | case ABS_EXPR: | |
4920 | case FLOAT_EXPR: | |
c6418a4e | 4921 | case EXCESS_PRECISION_EXPR: |
d10cfa8d | 4922 | /* These don't change whether an object is nonzero or zero. */ |
8e70fb09 | 4923 | return c_common_truthvalue_conversion (location, TREE_OPERAND (expr, 0)); |
b0fc3e72 | 4924 | |
4925 | case LROTATE_EXPR: | |
4926 | case RROTATE_EXPR: | |
d10cfa8d | 4927 | /* These don't change whether an object is zero or nonzero, but |
b0fc3e72 | 4928 | we can't ignore them if their second arg has side-effects. */ |
4929 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
e60a6f7b | 4930 | { |
4931 | expr = build2 (COMPOUND_EXPR, truthvalue_type_node, | |
4932 | TREE_OPERAND (expr, 1), | |
48e1416a | 4933 | c_common_truthvalue_conversion |
e60a6f7b | 4934 | (location, TREE_OPERAND (expr, 0))); |
4935 | goto ret; | |
4936 | } | |
b0fc3e72 | 4937 | else |
8e70fb09 | 4938 | return c_common_truthvalue_conversion (location, |
4939 | TREE_OPERAND (expr, 0)); | |
73be5127 | 4940 | |
b0fc3e72 | 4941 | case COND_EXPR: |
4942 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
a75b1c71 | 4943 | if (c_dialect_cxx ()) |
e60a6f7b | 4944 | { |
d0389adc | 4945 | tree op1 = TREE_OPERAND (expr, 1); |
4946 | tree op2 = TREE_OPERAND (expr, 2); | |
4947 | /* In C++ one of the arms might have void type if it is throw. */ | |
4948 | if (!VOID_TYPE_P (TREE_TYPE (op1))) | |
4949 | op1 = c_common_truthvalue_conversion (location, op1); | |
4950 | if (!VOID_TYPE_P (TREE_TYPE (op2))) | |
4951 | op2 = c_common_truthvalue_conversion (location, op2); | |
389dd41b | 4952 | expr = fold_build3_loc (location, COND_EXPR, truthvalue_type_node, |
d0389adc | 4953 | TREE_OPERAND (expr, 0), op1, op2); |
e60a6f7b | 4954 | goto ret; |
4955 | } | |
a75b1c71 | 4956 | else |
e60a6f7b | 4957 | { |
4958 | /* Folding will happen later for C. */ | |
4959 | expr = build3 (COND_EXPR, truthvalue_type_node, | |
4960 | TREE_OPERAND (expr, 0), | |
4961 | c_common_truthvalue_conversion (location, | |
4962 | TREE_OPERAND (expr, 1)), | |
4963 | c_common_truthvalue_conversion (location, | |
4964 | TREE_OPERAND (expr, 2))); | |
4965 | goto ret; | |
4966 | } | |
b0fc3e72 | 4967 | |
72dd6141 | 4968 | CASE_CONVERT: |
f8913d47 | 4969 | { |
4970 | tree totype = TREE_TYPE (expr); | |
4971 | tree fromtype = TREE_TYPE (TREE_OPERAND (expr, 0)); | |
4972 | ||
db3d1ffc | 4973 | if (POINTER_TYPE_P (totype) |
4974 | && TREE_CODE (fromtype) == REFERENCE_TYPE) | |
4975 | { | |
4976 | tree inner = expr; | |
4977 | STRIP_NOPS (inner); | |
4978 | ||
4979 | if (DECL_P (inner)) | |
4980 | warning_at (location, | |
4981 | OPT_Waddress, | |
4982 | "the compiler can assume that the address of " | |
4983 | "%qD will always evaluate to %<true%>", | |
4984 | inner); | |
4985 | } | |
4986 | ||
f8913d47 | 4987 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
4988 | since that affects how `default_conversion' will behave. */ | |
4989 | if (TREE_CODE (totype) == REFERENCE_TYPE | |
4990 | || TREE_CODE (fromtype) == REFERENCE_TYPE) | |
4991 | break; | |
4992 | /* Don't strip a conversion from C++0x scoped enum, since they | |
4993 | don't implicitly convert to other types. */ | |
4994 | if (TREE_CODE (fromtype) == ENUMERAL_TYPE | |
4995 | && ENUM_IS_SCOPED (fromtype)) | |
4996 | break; | |
4997 | /* If this isn't narrowing the argument, we can ignore it. */ | |
4998 | if (TYPE_PRECISION (totype) >= TYPE_PRECISION (fromtype)) | |
4999 | return c_common_truthvalue_conversion (location, | |
5000 | TREE_OPERAND (expr, 0)); | |
5001 | } | |
b0fc3e72 | 5002 | break; |
5003 | ||
16837b18 | 5004 | case MODIFY_EXPR: |
60a0513e | 5005 | if (!TREE_NO_WARNING (expr) |
5006 | && warn_parentheses) | |
5007 | { | |
5008 | warning (OPT_Wparentheses, | |
5009 | "suggest parentheses around assignment used as truth value"); | |
5010 | TREE_NO_WARNING (expr) = 1; | |
5011 | } | |
16837b18 | 5012 | break; |
73be5127 | 5013 | |
31f820d2 | 5014 | default: |
5015 | break; | |
b0fc3e72 | 5016 | } |
5017 | ||
2ba726d2 | 5018 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
a0748b7d | 5019 | { |
93be21c0 | 5020 | tree t = (in_late_binary_op ? save_expr (expr) : c_save_expr (expr)); |
e60a6f7b | 5021 | expr = (build_binary_op |
8e70fb09 | 5022 | (EXPR_LOCATION (expr), |
5023 | (TREE_SIDE_EFFECTS (expr) | |
a0748b7d | 5024 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
b6889cb0 | 5025 | c_common_truthvalue_conversion |
5026 | (location, | |
5027 | build_unary_op (location, REALPART_EXPR, t, 0)), | |
5028 | c_common_truthvalue_conversion | |
5029 | (location, | |
5030 | build_unary_op (location, IMAGPART_EXPR, t, 0)), | |
a0748b7d | 5031 | 0)); |
e60a6f7b | 5032 | goto ret; |
a0748b7d | 5033 | } |
2ba726d2 | 5034 | |
9421ebb9 | 5035 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
5036 | { | |
5037 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
5038 | FCONST0 (TYPE_MODE | |
5039 | (TREE_TYPE (expr)))); | |
43158006 | 5040 | return build_binary_op (location, NE_EXPR, expr, fixed_zero_node, 1); |
9421ebb9 | 5041 | } |
e60a6f7b | 5042 | else |
5043 | return build_binary_op (location, NE_EXPR, expr, integer_zero_node, 1); | |
9421ebb9 | 5044 | |
e60a6f7b | 5045 | ret: |
5046 | protected_set_expr_location (expr, location); | |
5047 | return expr; | |
b0fc3e72 | 5048 | } |
5049 | \f | |
3237155d | 5050 | static void def_builtin_1 (enum built_in_function fncode, |
5051 | const char *name, | |
5052 | enum built_in_class fnclass, | |
5053 | tree fntype, tree libtype, | |
5054 | bool both_p, bool fallback_p, bool nonansi_p, | |
5055 | tree fnattrs, bool implicit_p); | |
0d4238dc | 5056 | |
a5b1863e | 5057 | |
5058 | /* Apply the TYPE_QUALS to the new DECL. */ | |
5059 | ||
5060 | void | |
1cae46be | 5061 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
a5b1863e | 5062 | { |
adfb367f | 5063 | tree type = TREE_TYPE (decl); |
b27ac6b5 | 5064 | |
e4eabbe4 | 5065 | if (type == error_mark_node) |
5066 | return; | |
adfb367f | 5067 | |
98a33d9f | 5068 | if ((type_quals & TYPE_QUAL_CONST) |
5069 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
5070 | /* We used to check TYPE_NEEDS_CONSTRUCTING here, but now a constexpr | |
5071 | constructor can produce constant init, so rely on cp_finish_decl to | |
5072 | clear TREE_READONLY if the variable has non-constant init. */ | |
a5b1863e | 5073 | TREE_READONLY (decl) = 1; |
5074 | if (type_quals & TYPE_QUAL_VOLATILE) | |
5075 | { | |
5076 | TREE_SIDE_EFFECTS (decl) = 1; | |
5077 | TREE_THIS_VOLATILE (decl) = 1; | |
5078 | } | |
d91a20bc | 5079 | if (type_quals & TYPE_QUAL_RESTRICT) |
a5b1863e | 5080 | { |
adfb367f | 5081 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
5082 | /* Allow 'restrict' on arrays of pointers. | |
5083 | FIXME currently we just ignore it. */ | |
5084 | type = TREE_TYPE (type); | |
5085 | if (!type | |
5086 | || !POINTER_TYPE_P (type) | |
5087 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
b0b1af64 | 5088 | error ("invalid use of %<restrict%>"); |
a5b1863e | 5089 | } |
5090 | } | |
5091 | ||
2ef51f0e | 5092 | struct c_type_hasher : ggc_hasher<tree> |
5093 | { | |
5094 | static hashval_t hash (tree); | |
5095 | static bool equal (tree, tree); | |
5096 | }; | |
5097 | ||
4ee9c684 | 5098 | /* Hash function for the problem of multiple type definitions in |
5099 | different files. This must hash all types that will compare | |
5100 | equal via comptypes to the same value. In practice it hashes | |
0bed3869 | 5101 | on some of the simple stuff and leaves the details to comptypes. */ |
4ee9c684 | 5102 | |
2ef51f0e | 5103 | hashval_t |
5104 | c_type_hasher::hash (tree t) | |
4ee9c684 | 5105 | { |
ecf2703d | 5106 | int n_elements; |
4ee9c684 | 5107 | int shift, size; |
4ee9c684 | 5108 | tree t2; |
5109 | switch (TREE_CODE (t)) | |
5110 | { | |
fbf0afd1 | 5111 | /* For pointers, hash on pointee type plus some swizzling. */ |
2363ef00 | 5112 | case POINTER_TYPE: |
2ef51f0e | 5113 | return hash (TREE_TYPE (t)) ^ 0x3003003; |
2363ef00 | 5114 | /* Hash on number of elements and total size. */ |
5115 | case ENUMERAL_TYPE: | |
5116 | shift = 3; | |
5117 | t2 = TYPE_VALUES (t); | |
5118 | break; | |
5119 | case RECORD_TYPE: | |
5120 | shift = 0; | |
5121 | t2 = TYPE_FIELDS (t); | |
5122 | break; | |
5123 | case QUAL_UNION_TYPE: | |
5124 | shift = 1; | |
5125 | t2 = TYPE_FIELDS (t); | |
5126 | break; | |
5127 | case UNION_TYPE: | |
5128 | shift = 2; | |
5129 | t2 = TYPE_FIELDS (t); | |
5130 | break; | |
5131 | default: | |
231bd014 | 5132 | gcc_unreachable (); |
4ee9c684 | 5133 | } |
ecf2703d | 5134 | /* FIXME: We want to use a DECL_CHAIN iteration method here, but |
5135 | TYPE_VALUES of ENUMERAL_TYPEs is stored as a TREE_LIST. */ | |
5136 | n_elements = list_length (t2); | |
78c2e180 | 5137 | /* We might have a VLA here. */ |
5138 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
5139 | size = 0; | |
5140 | else | |
f9ae6f95 | 5141 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); |
ecf2703d | 5142 | return ((size << 24) | (n_elements << shift)); |
4ee9c684 | 5143 | } |
5144 | ||
2ef51f0e | 5145 | bool |
5146 | c_type_hasher::equal (tree t1, tree t2) | |
5147 | { | |
5148 | return lang_hooks.types_compatible_p (t1, t2); | |
5149 | } | |
5150 | ||
5151 | static GTY(()) hash_table<c_type_hasher> *type_hash_table; | |
1ecd4018 | 5152 | |
b5ba9f3a | 5153 | /* Return the typed-based alias set for T, which may be an expression |
f7c44134 | 5154 | or a type. Return -1 if we don't do anything special. */ |
ab2c1de8 | 5155 | |
32c2fdea | 5156 | alias_set_type |
1cae46be | 5157 | c_common_get_alias_set (tree t) |
b5ba9f3a | 5158 | { |
be4f2de7 | 5159 | tree u; |
1cae46be | 5160 | |
e58c17e7 | 5161 | /* For VLAs, use the alias set of the element type rather than the |
5162 | default of alias set 0 for types compared structurally. */ | |
5163 | if (TYPE_P (t) && TYPE_STRUCTURAL_EQUALITY_P (t)) | |
5164 | { | |
5165 | if (TREE_CODE (t) == ARRAY_TYPE) | |
5166 | return get_alias_set (TREE_TYPE (t)); | |
5167 | return -1; | |
5168 | } | |
5169 | ||
be4f2de7 | 5170 | /* Permit type-punning when accessing a union, provided the access |
5171 | is directly through the union. For example, this code does not | |
5172 | permit taking the address of a union member and then storing | |
5173 | through it. Even the type-punning allowed here is a GCC | |
5174 | extension, albeit a common and useful one; the C standard says | |
5175 | that such accesses have implementation-defined behavior. */ | |
5176 | for (u = t; | |
5177 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
5178 | u = TREE_OPERAND (u, 0)) | |
5179 | if (TREE_CODE (u) == COMPONENT_REF | |
5180 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
5181 | return 0; | |
1e2513d9 | 5182 | |
9fcc3e54 | 5183 | /* That's all the expressions we handle specially. */ |
84166705 | 5184 | if (!TYPE_P (t)) |
9fcc3e54 | 5185 | return -1; |
5186 | ||
d716ce75 | 5187 | /* The C standard guarantees that any object may be accessed via an |
9fcc3e54 | 5188 | lvalue that has character type. */ |
5189 | if (t == char_type_node | |
5190 | || t == signed_char_type_node | |
5191 | || t == unsigned_char_type_node) | |
f7c44134 | 5192 | return 0; |
a5b1863e | 5193 | |
1607663f | 5194 | /* The C standard specifically allows aliasing between signed and |
5195 | unsigned variants of the same type. We treat the signed | |
5196 | variant as canonical. */ | |
78a8ed03 | 5197 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
a8868e19 | 5198 | { |
4070745f | 5199 | tree t1 = c_common_signed_type (t); |
1607663f | 5200 | |
a8868e19 | 5201 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
5202 | if (t1 != t) | |
5203 | return get_alias_set (t1); | |
5204 | } | |
1e2513d9 | 5205 | |
4ee9c684 | 5206 | /* Handle the case of multiple type nodes referring to "the same" type, |
5207 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
5208 | C90 is handled. (In C99 type compatibility is not transitive, which | |
5209 | complicates things mightily. The alias set splay trees can theoretically | |
5210 | represent this, but insertion is tricky when you consider all the | |
5211 | different orders things might arrive in.) */ | |
5212 | ||
5213 | if (c_language != clk_c || flag_isoc99) | |
5214 | return -1; | |
5215 | ||
0bed3869 | 5216 | /* Save time if there's only one input file. */ |
e08bd2f4 | 5217 | if (num_in_fnames == 1) |
4ee9c684 | 5218 | return -1; |
5219 | ||
5220 | /* Pointers need special handling if they point to any type that | |
5221 | needs special handling (below). */ | |
5222 | if (TREE_CODE (t) == POINTER_TYPE) | |
5223 | { | |
5224 | tree t2; | |
5225 | /* Find bottom type under any nested POINTERs. */ | |
b27ac6b5 | 5226 | for (t2 = TREE_TYPE (t); |
af592f67 | 5227 | TREE_CODE (t2) == POINTER_TYPE; |
5228 | t2 = TREE_TYPE (t2)) | |
5229 | ; | |
b27ac6b5 | 5230 | if (TREE_CODE (t2) != RECORD_TYPE |
af592f67 | 5231 | && TREE_CODE (t2) != ENUMERAL_TYPE |
5232 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
5233 | && TREE_CODE (t2) != UNION_TYPE) | |
5234 | return -1; | |
4ee9c684 | 5235 | if (TYPE_SIZE (t2) == 0) |
af592f67 | 5236 | return -1; |
4ee9c684 | 5237 | } |
5238 | /* These are the only cases that need special handling. */ | |
b27ac6b5 | 5239 | if (TREE_CODE (t) != RECORD_TYPE |
4ee9c684 | 5240 | && TREE_CODE (t) != ENUMERAL_TYPE |
5241 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
5242 | && TREE_CODE (t) != UNION_TYPE | |
5243 | && TREE_CODE (t) != POINTER_TYPE) | |
5244 | return -1; | |
5245 | /* Undefined? */ | |
5246 | if (TYPE_SIZE (t) == 0) | |
5247 | return -1; | |
5248 | ||
b27ac6b5 | 5249 | /* Look up t in hash table. Only one of the compatible types within each |
4ee9c684 | 5250 | alias set is recorded in the table. */ |
5251 | if (!type_hash_table) | |
2ef51f0e | 5252 | type_hash_table = hash_table<c_type_hasher>::create_ggc (1021); |
5253 | tree *slot = type_hash_table->find_slot (t, INSERT); | |
4ee9c684 | 5254 | if (*slot != NULL) |
ad16cb2c | 5255 | { |
5256 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
5257 | return TYPE_ALIAS_SET ((tree)*slot); | |
5258 | } | |
4ee9c684 | 5259 | else |
5260 | /* Our caller will assign and record (in t) a new alias set; all we need | |
5261 | to do is remember t in the hash table. */ | |
5262 | *slot = t; | |
5263 | ||
f7c44134 | 5264 | return -1; |
b5ba9f3a | 5265 | } |
902b4e01 | 5266 | \f |
e60a6f7b | 5267 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where |
a179a7dc | 5268 | the IS_SIZEOF parameter indicates which operator is being applied. |
e60a6f7b | 5269 | The COMPLAIN flag controls whether we should diagnose possibly |
5270 | ill-formed constructs or not. LOC is the location of the SIZEOF or | |
a179a7dc | 5271 | TYPEOF operator. If MIN_ALIGNOF, the least alignment required for |
5272 | a type in any context should be returned, rather than the normal | |
5273 | alignment for that type. */ | |
908c697e | 5274 | |
902b4e01 | 5275 | tree |
e60a6f7b | 5276 | c_sizeof_or_alignof_type (location_t loc, |
a179a7dc | 5277 | tree type, bool is_sizeof, bool min_alignof, |
5278 | int complain) | |
902b4e01 | 5279 | { |
d4c4d95c | 5280 | const char *op_name; |
5281 | tree value = NULL; | |
5282 | enum tree_code type_code = TREE_CODE (type); | |
1cae46be | 5283 | |
908c697e | 5284 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
1cae46be | 5285 | |
d4c4d95c | 5286 | if (type_code == FUNCTION_TYPE) |
902b4e01 | 5287 | { |
908c697e | 5288 | if (is_sizeof) |
d4c4d95c | 5289 | { |
9205a6cc | 5290 | if (complain && warn_pointer_arith) |
5291 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 5292 | "invalid application of %<sizeof%> to a function type"); |
ebd21de4 | 5293 | else if (!complain) |
5294 | return error_mark_node; | |
d4c4d95c | 5295 | value = size_one_node; |
5296 | } | |
5297 | else | |
83e25171 | 5298 | { |
5299 | if (complain) | |
5300 | { | |
5301 | if (c_dialect_cxx ()) | |
29438999 | 5302 | pedwarn (loc, OPT_Wpedantic, "ISO C++ does not permit " |
83e25171 | 5303 | "%<alignof%> applied to a function type"); |
5304 | else | |
29438999 | 5305 | pedwarn (loc, OPT_Wpedantic, "ISO C does not permit " |
83e25171 | 5306 | "%<_Alignof%> applied to a function type"); |
5307 | } | |
5308 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
5309 | } | |
d4c4d95c | 5310 | } |
5311 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
5312 | { | |
1cae46be | 5313 | if (type_code == VOID_TYPE |
9205a6cc | 5314 | && complain && warn_pointer_arith) |
5315 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 5316 | "invalid application of %qs to a void type", op_name); |
ebd21de4 | 5317 | else if (!complain) |
5318 | return error_mark_node; | |
d4c4d95c | 5319 | value = size_one_node; |
902b4e01 | 5320 | } |
3df19e1b | 5321 | else if (!COMPLETE_TYPE_P (type) |
5322 | && (!c_dialect_cxx () || is_sizeof || type_code != ARRAY_TYPE)) | |
902b4e01 | 5323 | { |
d3a4d008 | 5324 | if (complain) |
3df19e1b | 5325 | error_at (loc, "invalid application of %qs to incomplete type %qT", |
e60a6f7b | 5326 | op_name, type); |
9c719c74 | 5327 | return error_mark_node; |
902b4e01 | 5328 | } |
3df19e1b | 5329 | else if (c_dialect_cxx () && type_code == ARRAY_TYPE |
5330 | && !COMPLETE_TYPE_P (TREE_TYPE (type))) | |
5331 | { | |
5332 | if (complain) | |
5333 | error_at (loc, "invalid application of %qs to array type %qT of " | |
5334 | "incomplete element type", op_name, type); | |
5335 | return error_mark_node; | |
5336 | } | |
902b4e01 | 5337 | else |
d4c4d95c | 5338 | { |
908c697e | 5339 | if (is_sizeof) |
d4c4d95c | 5340 | /* Convert in case a char is more than one unit. */ |
389dd41b | 5341 | value = size_binop_loc (loc, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
5342 | size_int (TYPE_PRECISION (char_type_node) | |
5343 | / BITS_PER_UNIT)); | |
a179a7dc | 5344 | else if (min_alignof) |
c2c4ae8d | 5345 | value = size_int (min_align_of_type (type)); |
d4c4d95c | 5346 | else |
d37625c0 | 5347 | value = size_int (TYPE_ALIGN_UNIT (type)); |
d4c4d95c | 5348 | } |
902b4e01 | 5349 | |
5a1fe2db | 5350 | /* VALUE will have the middle-end integer type sizetype. |
5351 | However, we should really return a value of type `size_t', | |
5352 | which is just a typedef for an ordinary integer type. */ | |
389dd41b | 5353 | value = fold_convert_loc (loc, size_type_node, value); |
1cae46be | 5354 | |
d4c4d95c | 5355 | return value; |
902b4e01 | 5356 | } |
5357 | ||
5358 | /* Implement the __alignof keyword: Return the minimum required | |
097b5c8b | 5359 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
5360 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
e60a6f7b | 5361 | from an "aligned" __attribute__ specification). LOC is the |
5362 | location of the ALIGNOF operator. */ | |
72040e7e | 5363 | |
902b4e01 | 5364 | tree |
e60a6f7b | 5365 | c_alignof_expr (location_t loc, tree expr) |
902b4e01 | 5366 | { |
5367 | tree t; | |
5368 | ||
097b5c8b | 5369 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
d37625c0 | 5370 | t = size_int (DECL_ALIGN_UNIT (expr)); |
1cae46be | 5371 | |
902b4e01 | 5372 | else if (TREE_CODE (expr) == COMPONENT_REF |
5373 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
5374 | { | |
e60a6f7b | 5375 | error_at (loc, "%<__alignof%> applied to a bit-field"); |
902b4e01 | 5376 | t = size_one_node; |
5377 | } | |
5378 | else if (TREE_CODE (expr) == COMPONENT_REF | |
7cc7e163 | 5379 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
d37625c0 | 5380 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
1cae46be | 5381 | |
902b4e01 | 5382 | else if (TREE_CODE (expr) == INDIRECT_REF) |
5383 | { | |
5384 | tree t = TREE_OPERAND (expr, 0); | |
5385 | tree best = t; | |
5386 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
1cae46be | 5387 | |
72dd6141 | 5388 | while (CONVERT_EXPR_P (t) |
7cc7e163 | 5389 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
902b4e01 | 5390 | { |
5391 | int thisalign; | |
5392 | ||
5393 | t = TREE_OPERAND (t, 0); | |
5394 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
5395 | if (thisalign > bestalign) | |
5396 | best = t, bestalign = thisalign; | |
5397 | } | |
e60a6f7b | 5398 | return c_alignof (loc, TREE_TYPE (TREE_TYPE (best))); |
902b4e01 | 5399 | } |
5400 | else | |
e60a6f7b | 5401 | return c_alignof (loc, TREE_TYPE (expr)); |
902b4e01 | 5402 | |
389dd41b | 5403 | return fold_convert_loc (loc, size_type_node, t); |
902b4e01 | 5404 | } |
5405 | \f | |
8fe4a266 | 5406 | /* Handle C and C++ default attributes. */ |
5407 | ||
5408 | enum built_in_attribute | |
5409 | { | |
5410 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
5411 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
c8010b80 | 5412 | #define DEF_ATTR_STRING(ENUM, VALUE) ENUM, |
8fe4a266 | 5413 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, |
5414 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
8fe4a266 | 5415 | #include "builtin-attrs.def" |
5416 | #undef DEF_ATTR_NULL_TREE | |
5417 | #undef DEF_ATTR_INT | |
c8010b80 | 5418 | #undef DEF_ATTR_STRING |
8fe4a266 | 5419 | #undef DEF_ATTR_IDENT |
5420 | #undef DEF_ATTR_TREE_LIST | |
8fe4a266 | 5421 | ATTR_LAST |
5422 | }; | |
5423 | ||
5424 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
5425 | ||
1cae46be | 5426 | static void c_init_attributes (void); |
8fe4a266 | 5427 | |
27213ba3 | 5428 | enum c_builtin_type |
72040e7e | 5429 | { |
d2d4bdde | 5430 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
5431 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
5432 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
5433 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
5434 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
5435 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
0a39fd54 | 5436 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
3c77ca67 | 5437 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5438 | ARG6) NAME, | |
5439 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5440 | ARG6, ARG7) NAME, | |
5441 | #define DEF_FUNCTION_TYPE_8(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5442 | ARG6, ARG7, ARG8) NAME, | |
d2d4bdde | 5443 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
5444 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
5445 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
03901330 | 5446 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
0a39fd54 | 5447 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
3c77ca67 | 5448 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ |
6349b8cc | 5449 | NAME, |
5450 | #define DEF_FUNCTION_TYPE_VAR_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5451 | ARG6, ARG7) NAME, | |
5452 | #define DEF_FUNCTION_TYPE_VAR_11(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5453 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) NAME, | |
d2d4bdde | 5454 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
5455 | #include "builtin-types.def" | |
5456 | #undef DEF_PRIMITIVE_TYPE | |
5457 | #undef DEF_FUNCTION_TYPE_0 | |
5458 | #undef DEF_FUNCTION_TYPE_1 | |
5459 | #undef DEF_FUNCTION_TYPE_2 | |
5460 | #undef DEF_FUNCTION_TYPE_3 | |
5461 | #undef DEF_FUNCTION_TYPE_4 | |
0a39fd54 | 5462 | #undef DEF_FUNCTION_TYPE_5 |
5463 | #undef DEF_FUNCTION_TYPE_6 | |
27213ba3 | 5464 | #undef DEF_FUNCTION_TYPE_7 |
bc7bff74 | 5465 | #undef DEF_FUNCTION_TYPE_8 |
d2d4bdde | 5466 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5467 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5468 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
03901330 | 5469 | #undef DEF_FUNCTION_TYPE_VAR_3 |
0a39fd54 | 5470 | #undef DEF_FUNCTION_TYPE_VAR_4 |
5471 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
6349b8cc | 5472 | #undef DEF_FUNCTION_TYPE_VAR_7 |
5473 | #undef DEF_FUNCTION_TYPE_VAR_11 | |
d2d4bdde | 5474 | #undef DEF_POINTER_TYPE |
27213ba3 | 5475 | BT_LAST |
5476 | }; | |
5477 | ||
5478 | typedef enum c_builtin_type builtin_type; | |
d2d4bdde | 5479 | |
27213ba3 | 5480 | /* A temporary array for c_common_nodes_and_builtins. Used in |
5481 | communication with def_fn_type. */ | |
5482 | static tree builtin_types[(int) BT_LAST + 1]; | |
d2d4bdde | 5483 | |
27213ba3 | 5484 | /* A helper function for c_common_nodes_and_builtins. Build function type |
5485 | for DEF with return type RET and N arguments. If VAR is true, then the | |
5486 | function should be variadic after those N arguments. | |
5487 | ||
5488 | Takes special care not to ICE if any of the types involved are | |
5489 | error_mark_node, which indicates that said type is not in fact available | |
5490 | (see builtin_type_for_size). In which case the function type as a whole | |
5491 | should be error_mark_node. */ | |
5492 | ||
5493 | static void | |
5494 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
5495 | { | |
3a939d12 | 5496 | tree t; |
5497 | tree *args = XALLOCAVEC (tree, n); | |
27213ba3 | 5498 | va_list list; |
5499 | int i; | |
5500 | ||
5501 | va_start (list, n); | |
5502 | for (i = 0; i < n; ++i) | |
5503 | { | |
7d339f93 | 5504 | builtin_type a = (builtin_type) va_arg (list, int); |
27213ba3 | 5505 | t = builtin_types[a]; |
5506 | if (t == error_mark_node) | |
5507 | goto egress; | |
3a939d12 | 5508 | args[i] = t; |
27213ba3 | 5509 | } |
27213ba3 | 5510 | |
27213ba3 | 5511 | t = builtin_types[ret]; |
5512 | if (t == error_mark_node) | |
5513 | goto egress; | |
3a939d12 | 5514 | if (var) |
5515 | t = build_varargs_function_type_array (t, n, args); | |
5516 | else | |
5517 | t = build_function_type_array (t, n, args); | |
27213ba3 | 5518 | |
5519 | egress: | |
5520 | builtin_types[def] = t; | |
451c8e2f | 5521 | va_end (list); |
27213ba3 | 5522 | } |
5523 | ||
dce22712 | 5524 | /* Build builtin functions common to both C and C++ language |
5525 | frontends. */ | |
5526 | ||
5527 | static void | |
5528 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
5529 | { | |
5530 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
5531 | builtin_types[ENUM] = VALUE; | |
5532 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
5533 | def_fn_type (ENUM, RETURN, 0, 0); | |
5534 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
5535 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
5536 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
5537 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
5538 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5539 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
5540 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5541 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
5542 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5543 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
5544 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5545 | ARG6) \ | |
5546 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
5547 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5548 | ARG6, ARG7) \ | |
5549 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
bc7bff74 | 5550 | #define DEF_FUNCTION_TYPE_8(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5551 | ARG6, ARG7, ARG8) \ | |
5552 | def_fn_type (ENUM, RETURN, 0, 8, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
5553 | ARG7, ARG8); | |
dce22712 | 5554 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ |
5555 | def_fn_type (ENUM, RETURN, 1, 0); | |
5556 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
5557 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
5558 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
5559 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
5560 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5561 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
5562 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5563 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
5564 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5565 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
6349b8cc | 5566 | #define DEF_FUNCTION_TYPE_VAR_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5567 | ARG6, ARG7) \ | |
5568 | def_fn_type (ENUM, RETURN, 1, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
5569 | #define DEF_FUNCTION_TYPE_VAR_11(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5570 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) \ | |
5571 | def_fn_type (ENUM, RETURN, 1, 11, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
5572 | ARG7, ARG8, ARG9, ARG10, ARG11); | |
dce22712 | 5573 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ |
5574 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
5575 | ||
5576 | #include "builtin-types.def" | |
5577 | ||
5578 | #undef DEF_PRIMITIVE_TYPE | |
3c77ca67 | 5579 | #undef DEF_FUNCTION_TYPE_0 |
dce22712 | 5580 | #undef DEF_FUNCTION_TYPE_1 |
5581 | #undef DEF_FUNCTION_TYPE_2 | |
5582 | #undef DEF_FUNCTION_TYPE_3 | |
5583 | #undef DEF_FUNCTION_TYPE_4 | |
5584 | #undef DEF_FUNCTION_TYPE_5 | |
5585 | #undef DEF_FUNCTION_TYPE_6 | |
3c77ca67 | 5586 | #undef DEF_FUNCTION_TYPE_7 |
5587 | #undef DEF_FUNCTION_TYPE_8 | |
dce22712 | 5588 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5589 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5590 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
5591 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
5592 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
5593 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
6349b8cc | 5594 | #undef DEF_FUNCTION_TYPE_VAR_7 |
5595 | #undef DEF_FUNCTION_TYPE_VAR_11 | |
dce22712 | 5596 | #undef DEF_POINTER_TYPE |
5597 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
5598 | ||
5599 | c_init_attributes (); | |
5600 | ||
5601 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
5602 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
5603 | if (NAME && COND) \ | |
5604 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
5605 | builtin_types[(int) TYPE], \ | |
5606 | builtin_types[(int) LIBTYPE], \ | |
5607 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
5608 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
5609 | #include "builtins.def" | |
5610 | #undef DEF_BUILTIN | |
5611 | ||
87eb1c28 | 5612 | targetm.init_builtins (); |
5613 | ||
471eff36 | 5614 | build_common_builtin_nodes (); |
dce22712 | 5615 | |
a89e6c15 | 5616 | if (flag_cilkplus) |
d037099f | 5617 | cilk_init_builtins (); |
dce22712 | 5618 | } |
5619 | ||
9e6687c8 | 5620 | /* Like get_identifier, but avoid warnings about null arguments when |
5621 | the argument may be NULL for targets where GCC lacks stdint.h type | |
5622 | information. */ | |
5623 | ||
5624 | static inline tree | |
5625 | c_get_ident (const char *id) | |
5626 | { | |
5627 | return get_identifier (id); | |
5628 | } | |
5629 | ||
27213ba3 | 5630 | /* Build tree nodes and builtin functions common to both C and C++ language |
5631 | frontends. */ | |
5632 | ||
5633 | void | |
5634 | c_common_nodes_and_builtins (void) | |
5635 | { | |
924bbf02 | 5636 | int char16_type_size; |
5637 | int char32_type_size; | |
174fcc61 | 5638 | int wchar_type_size; |
5639 | tree array_domain_type; | |
2d47cc32 | 5640 | tree va_list_ref_type_node; |
8a15c04a | 5641 | tree va_list_arg_type_node; |
9f75f026 | 5642 | int i; |
a66c9326 | 5643 | |
c38a75b7 | 5644 | build_common_tree_nodes (flag_signed_char, flag_short_double); |
e593356b | 5645 | |
174fcc61 | 5646 | /* Define `int' and `char' first so that dbx will output them first. */ |
d946ea19 | 5647 | record_builtin_type (RID_INT, NULL, integer_type_node); |
174fcc61 | 5648 | record_builtin_type (RID_CHAR, "char", char_type_node); |
5649 | ||
5650 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
5651 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
5652 | but not C. Are the conditionals here needed? */ | |
c0f19401 | 5653 | if (c_dialect_cxx ()) |
d946ea19 | 5654 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
174fcc61 | 5655 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
5656 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
5657 | record_builtin_type (RID_MAX, "long unsigned int", | |
5658 | long_unsigned_type_node); | |
9f75f026 | 5659 | |
5660 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
6388cfe2 | 5661 | { |
9f75f026 | 5662 | char name[25]; |
5663 | ||
5664 | sprintf (name, "__int%d", int_n_data[i].bitsize); | |
76738f56 | 5665 | record_builtin_type ((enum rid)(RID_FIRST_INT_N + i), name, |
9f75f026 | 5666 | int_n_trees[i].signed_type); |
5667 | sprintf (name, "__int%d unsigned", int_n_data[i].bitsize); | |
76738f56 | 5668 | record_builtin_type (RID_MAX, name, int_n_trees[i].unsigned_type); |
6388cfe2 | 5669 | } |
9f75f026 | 5670 | |
c0f19401 | 5671 | if (c_dialect_cxx ()) |
174fcc61 | 5672 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
5673 | record_builtin_type (RID_MAX, "long long int", | |
5674 | long_long_integer_type_node); | |
5675 | record_builtin_type (RID_MAX, "long long unsigned int", | |
5676 | long_long_unsigned_type_node); | |
c0f19401 | 5677 | if (c_dialect_cxx ()) |
174fcc61 | 5678 | record_builtin_type (RID_MAX, "long long unsigned", |
5679 | long_long_unsigned_type_node); | |
5680 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
5681 | record_builtin_type (RID_MAX, "short unsigned int", | |
5682 | short_unsigned_type_node); | |
c0f19401 | 5683 | if (c_dialect_cxx ()) |
174fcc61 | 5684 | record_builtin_type (RID_MAX, "unsigned short", |
5685 | short_unsigned_type_node); | |
5686 | ||
5687 | /* Define both `signed char' and `unsigned char'. */ | |
5688 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
5689 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
5690 | ||
771d21fa | 5691 | /* These are types that c_common_type_for_size and |
5692 | c_common_type_for_mode use. */ | |
e60a6f7b | 5693 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5694 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5695 | intQI_type_node)); |
e60a6f7b | 5696 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5697 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5698 | intHI_type_node)); |
e60a6f7b | 5699 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5700 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5701 | intSI_type_node)); |
e60a6f7b | 5702 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5703 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5704 | intDI_type_node)); |
174fcc61 | 5705 | #if HOST_BITS_PER_WIDE_INT >= 64 |
9f75f026 | 5706 | /* Note that this is different than the __int128 type that's part of |
5707 | the generic __intN support. */ | |
f1515a39 | 5708 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 5709 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5710 | TYPE_DECL, | |
f1515a39 | 5711 | get_identifier ("__int128_t"), |
5712 | intTI_type_node)); | |
174fcc61 | 5713 | #endif |
e60a6f7b | 5714 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5715 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5716 | unsigned_intQI_type_node)); |
e60a6f7b | 5717 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5718 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5719 | unsigned_intHI_type_node)); |
e60a6f7b | 5720 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5721 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5722 | unsigned_intSI_type_node)); |
e60a6f7b | 5723 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5724 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5725 | unsigned_intDI_type_node)); |
174fcc61 | 5726 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 5727 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 5728 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5729 | TYPE_DECL, | |
f1515a39 | 5730 | get_identifier ("__uint128_t"), |
5731 | unsigned_intTI_type_node)); | |
174fcc61 | 5732 | #endif |
5733 | ||
5734 | /* Create the widest literal types. */ | |
5735 | widest_integer_literal_type_node | |
5736 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 5737 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5738 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5739 | widest_integer_literal_type_node)); |
174fcc61 | 5740 | |
5741 | widest_unsigned_literal_type_node | |
5742 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 5743 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5744 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5745 | widest_unsigned_literal_type_node)); |
174fcc61 | 5746 | |
654ef926 | 5747 | signed_size_type_node = c_common_signed_type (size_type_node); |
174fcc61 | 5748 | |
73673831 | 5749 | pid_type_node = |
5750 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
5751 | ||
d946ea19 | 5752 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
5753 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
174fcc61 | 5754 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
5755 | ||
c4503c0a | 5756 | /* Only supported decimal floating point extension if the target |
5757 | actually supports underlying modes. */ | |
48e1416a | 5758 | if (targetm.scalar_mode_supported_p (SDmode) |
c4503c0a | 5759 | && targetm.scalar_mode_supported_p (DDmode) |
5760 | && targetm.scalar_mode_supported_p (TDmode)) | |
5761 | { | |
5762 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
5763 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
5764 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
5765 | } | |
5766 | ||
9421ebb9 | 5767 | if (targetm.fixed_point_supported_p ()) |
5768 | { | |
5769 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
5770 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
5771 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
5772 | record_builtin_type (RID_MAX, "long long _Fract", | |
5773 | long_long_fract_type_node); | |
5774 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
5775 | unsigned_short_fract_type_node); | |
5776 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
5777 | unsigned_fract_type_node); | |
5778 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
5779 | unsigned_long_fract_type_node); | |
5780 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
5781 | unsigned_long_long_fract_type_node); | |
5782 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
5783 | sat_short_fract_type_node); | |
5784 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
5785 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
5786 | sat_long_fract_type_node); | |
5787 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
5788 | sat_long_long_fract_type_node); | |
5789 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
5790 | sat_unsigned_short_fract_type_node); | |
5791 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
5792 | sat_unsigned_fract_type_node); | |
5793 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
5794 | sat_unsigned_long_fract_type_node); | |
5795 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
5796 | sat_unsigned_long_long_fract_type_node); | |
5797 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
5798 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
5799 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
5800 | record_builtin_type (RID_MAX, "long long _Accum", | |
5801 | long_long_accum_type_node); | |
5802 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
5803 | unsigned_short_accum_type_node); | |
5804 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
5805 | unsigned_accum_type_node); | |
5806 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
5807 | unsigned_long_accum_type_node); | |
5808 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
5809 | unsigned_long_long_accum_type_node); | |
5810 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
5811 | sat_short_accum_type_node); | |
5812 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
5813 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
5814 | sat_long_accum_type_node); | |
5815 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
5816 | sat_long_long_accum_type_node); | |
5817 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
5818 | sat_unsigned_short_accum_type_node); | |
5819 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
5820 | sat_unsigned_accum_type_node); | |
5821 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
5822 | sat_unsigned_long_accum_type_node); | |
5823 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
5824 | sat_unsigned_long_long_accum_type_node); | |
5825 | ||
5826 | } | |
5827 | ||
e60a6f7b | 5828 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5829 | TYPE_DECL, | |
dc24ddbd | 5830 | get_identifier ("complex int"), |
5831 | complex_integer_type_node)); | |
e60a6f7b | 5832 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5833 | TYPE_DECL, | |
dc24ddbd | 5834 | get_identifier ("complex float"), |
5835 | complex_float_type_node)); | |
e60a6f7b | 5836 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5837 | TYPE_DECL, | |
dc24ddbd | 5838 | get_identifier ("complex double"), |
5839 | complex_double_type_node)); | |
5840 | lang_hooks.decls.pushdecl | |
e60a6f7b | 5841 | (build_decl (UNKNOWN_LOCATION, |
5842 | TYPE_DECL, get_identifier ("complex long double"), | |
20325f61 | 5843 | complex_long_double_type_node)); |
174fcc61 | 5844 | |
e256d445 | 5845 | if (c_dialect_cxx ()) |
5846 | /* For C++, make fileptr_type_node a distinct void * type until | |
5847 | FILE type is defined. */ | |
e086912e | 5848 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
e256d445 | 5849 | |
d946ea19 | 5850 | record_builtin_type (RID_VOID, NULL, void_type_node); |
174fcc61 | 5851 | |
6753bca0 | 5852 | /* Set the TYPE_NAME for any variants that were built before |
5853 | record_builtin_type gave names to the built-in types. */ | |
5854 | { | |
5855 | tree void_name = TYPE_NAME (void_type_node); | |
5856 | TYPE_NAME (void_type_node) = NULL_TREE; | |
5857 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
5858 | = void_name; | |
5859 | TYPE_NAME (void_type_node) = void_name; | |
5860 | } | |
5861 | ||
174fcc61 | 5862 | void_list_node = build_void_list_node (); |
5863 | ||
5864 | /* Make a type to be the domain of a few array types | |
5865 | whose domains don't really matter. | |
5866 | 200 is small enough that it always fits in size_t | |
5867 | and large enough that it can hold most function names for the | |
5868 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
5869 | array_domain_type = build_index_type (size_int (200)); | |
5870 | ||
5871 | /* Make a type for arrays of characters. | |
5872 | With luck nothing will ever really depend on the length of this | |
5873 | array type. */ | |
5874 | char_array_type_node | |
5875 | = build_array_type (char_type_node, array_domain_type); | |
5876 | ||
d2d4bdde | 5877 | string_type_node = build_pointer_type (char_type_node); |
5878 | const_string_type_node | |
5879 | = build_pointer_type (build_qualified_type | |
5880 | (char_type_node, TYPE_QUAL_CONST)); | |
5881 | ||
174fcc61 | 5882 | /* This is special for C++ so functions can be overloaded. */ |
18ef7ac2 | 5883 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
174fcc61 | 5884 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
5885 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
f3449a3c | 5886 | underlying_wchar_type_node = wchar_type_node; |
c0f19401 | 5887 | if (c_dialect_cxx ()) |
174fcc61 | 5888 | { |
78a8ed03 | 5889 | if (TYPE_UNSIGNED (wchar_type_node)) |
174fcc61 | 5890 | wchar_type_node = make_unsigned_type (wchar_type_size); |
5891 | else | |
5892 | wchar_type_node = make_signed_type (wchar_type_size); | |
5893 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
5894 | } | |
174fcc61 | 5895 | |
5896 | /* This is for wide string constants. */ | |
5897 | wchar_array_type_node | |
5898 | = build_array_type (wchar_type_node, array_domain_type); | |
5899 | ||
924bbf02 | 5900 | /* Define 'char16_t'. */ |
5901 | char16_type_node = get_identifier (CHAR16_TYPE); | |
5902 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
5903 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
5904 | if (c_dialect_cxx ()) | |
5905 | { | |
5906 | char16_type_node = make_unsigned_type (char16_type_size); | |
5907 | ||
60777f69 | 5908 | if (cxx_dialect >= cxx11) |
924bbf02 | 5909 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); |
5910 | } | |
5911 | ||
5912 | /* This is for UTF-16 string constants. */ | |
5913 | char16_array_type_node | |
5914 | = build_array_type (char16_type_node, array_domain_type); | |
5915 | ||
5916 | /* Define 'char32_t'. */ | |
5917 | char32_type_node = get_identifier (CHAR32_TYPE); | |
5918 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
5919 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
5920 | if (c_dialect_cxx ()) | |
5921 | { | |
5922 | char32_type_node = make_unsigned_type (char32_type_size); | |
5923 | ||
60777f69 | 5924 | if (cxx_dialect >= cxx11) |
924bbf02 | 5925 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); |
5926 | } | |
5927 | ||
5928 | /* This is for UTF-32 string constants. */ | |
5929 | char32_array_type_node | |
5930 | = build_array_type (char32_type_node, array_domain_type); | |
5931 | ||
6bf5ed8d | 5932 | wint_type_node = |
5933 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
5934 | ||
5935 | intmax_type_node = | |
5936 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
5937 | uintmax_type_node = | |
5938 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
5939 | ||
f3449a3c | 5940 | if (SIG_ATOMIC_TYPE) |
5941 | sig_atomic_type_node = | |
9e6687c8 | 5942 | TREE_TYPE (identifier_global_value (c_get_ident (SIG_ATOMIC_TYPE))); |
f3449a3c | 5943 | if (INT8_TYPE) |
5944 | int8_type_node = | |
9e6687c8 | 5945 | TREE_TYPE (identifier_global_value (c_get_ident (INT8_TYPE))); |
f3449a3c | 5946 | if (INT16_TYPE) |
5947 | int16_type_node = | |
9e6687c8 | 5948 | TREE_TYPE (identifier_global_value (c_get_ident (INT16_TYPE))); |
f3449a3c | 5949 | if (INT32_TYPE) |
5950 | int32_type_node = | |
9e6687c8 | 5951 | TREE_TYPE (identifier_global_value (c_get_ident (INT32_TYPE))); |
f3449a3c | 5952 | if (INT64_TYPE) |
5953 | int64_type_node = | |
9e6687c8 | 5954 | TREE_TYPE (identifier_global_value (c_get_ident (INT64_TYPE))); |
f3449a3c | 5955 | if (UINT8_TYPE) |
5956 | uint8_type_node = | |
9e6687c8 | 5957 | TREE_TYPE (identifier_global_value (c_get_ident (UINT8_TYPE))); |
f3449a3c | 5958 | if (UINT16_TYPE) |
d1081017 | 5959 | c_uint16_type_node = uint16_type_node = |
9e6687c8 | 5960 | TREE_TYPE (identifier_global_value (c_get_ident (UINT16_TYPE))); |
f3449a3c | 5961 | if (UINT32_TYPE) |
d1081017 | 5962 | c_uint32_type_node = uint32_type_node = |
9e6687c8 | 5963 | TREE_TYPE (identifier_global_value (c_get_ident (UINT32_TYPE))); |
f3449a3c | 5964 | if (UINT64_TYPE) |
d1081017 | 5965 | c_uint64_type_node = uint64_type_node = |
9e6687c8 | 5966 | TREE_TYPE (identifier_global_value (c_get_ident (UINT64_TYPE))); |
f3449a3c | 5967 | if (INT_LEAST8_TYPE) |
5968 | int_least8_type_node = | |
9e6687c8 | 5969 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST8_TYPE))); |
f3449a3c | 5970 | if (INT_LEAST16_TYPE) |
5971 | int_least16_type_node = | |
9e6687c8 | 5972 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST16_TYPE))); |
f3449a3c | 5973 | if (INT_LEAST32_TYPE) |
5974 | int_least32_type_node = | |
9e6687c8 | 5975 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST32_TYPE))); |
f3449a3c | 5976 | if (INT_LEAST64_TYPE) |
5977 | int_least64_type_node = | |
9e6687c8 | 5978 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST64_TYPE))); |
f3449a3c | 5979 | if (UINT_LEAST8_TYPE) |
5980 | uint_least8_type_node = | |
9e6687c8 | 5981 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST8_TYPE))); |
f3449a3c | 5982 | if (UINT_LEAST16_TYPE) |
5983 | uint_least16_type_node = | |
9e6687c8 | 5984 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST16_TYPE))); |
f3449a3c | 5985 | if (UINT_LEAST32_TYPE) |
5986 | uint_least32_type_node = | |
9e6687c8 | 5987 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST32_TYPE))); |
f3449a3c | 5988 | if (UINT_LEAST64_TYPE) |
5989 | uint_least64_type_node = | |
9e6687c8 | 5990 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST64_TYPE))); |
f3449a3c | 5991 | if (INT_FAST8_TYPE) |
5992 | int_fast8_type_node = | |
9e6687c8 | 5993 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST8_TYPE))); |
f3449a3c | 5994 | if (INT_FAST16_TYPE) |
5995 | int_fast16_type_node = | |
9e6687c8 | 5996 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST16_TYPE))); |
f3449a3c | 5997 | if (INT_FAST32_TYPE) |
5998 | int_fast32_type_node = | |
9e6687c8 | 5999 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST32_TYPE))); |
f3449a3c | 6000 | if (INT_FAST64_TYPE) |
6001 | int_fast64_type_node = | |
9e6687c8 | 6002 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST64_TYPE))); |
f3449a3c | 6003 | if (UINT_FAST8_TYPE) |
6004 | uint_fast8_type_node = | |
9e6687c8 | 6005 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST8_TYPE))); |
f3449a3c | 6006 | if (UINT_FAST16_TYPE) |
6007 | uint_fast16_type_node = | |
9e6687c8 | 6008 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST16_TYPE))); |
f3449a3c | 6009 | if (UINT_FAST32_TYPE) |
6010 | uint_fast32_type_node = | |
9e6687c8 | 6011 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST32_TYPE))); |
f3449a3c | 6012 | if (UINT_FAST64_TYPE) |
6013 | uint_fast64_type_node = | |
9e6687c8 | 6014 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST64_TYPE))); |
f3449a3c | 6015 | if (INTPTR_TYPE) |
6016 | intptr_type_node = | |
9e6687c8 | 6017 | TREE_TYPE (identifier_global_value (c_get_ident (INTPTR_TYPE))); |
f3449a3c | 6018 | if (UINTPTR_TYPE) |
6019 | uintptr_type_node = | |
9e6687c8 | 6020 | TREE_TYPE (identifier_global_value (c_get_ident (UINTPTR_TYPE))); |
f3449a3c | 6021 | |
3a939d12 | 6022 | default_function_type |
6023 | = build_varargs_function_type_list (integer_type_node, NULL_TREE); | |
6bf5ed8d | 6024 | ptrdiff_type_node |
6025 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
11773141 | 6026 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
6bf5ed8d | 6027 | |
dc24ddbd | 6028 | lang_hooks.decls.pushdecl |
e60a6f7b | 6029 | (build_decl (UNKNOWN_LOCATION, |
6030 | TYPE_DECL, get_identifier ("__builtin_va_list"), | |
20325f61 | 6031 | va_list_type_node)); |
202d6e5f | 6032 | if (targetm.enum_va_list_p) |
acd6f472 | 6033 | { |
6034 | int l; | |
6035 | const char *pname; | |
6036 | tree ptype; | |
5f57a8b1 | 6037 | |
202d6e5f | 6038 | for (l = 0; targetm.enum_va_list_p (l, &pname, &ptype); ++l) |
acd6f472 | 6039 | { |
6040 | lang_hooks.decls.pushdecl | |
6041 | (build_decl (UNKNOWN_LOCATION, | |
6042 | TYPE_DECL, get_identifier (pname), | |
6043 | ptype)); | |
ab2c1de8 | 6044 | |
acd6f472 | 6045 | } |
6046 | } | |
8a15c04a | 6047 | |
8a15c04a | 6048 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
2d47cc32 | 6049 | { |
6050 | va_list_arg_type_node = va_list_ref_type_node = | |
6051 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
6052 | } | |
8a15c04a | 6053 | else |
2d47cc32 | 6054 | { |
6055 | va_list_arg_type_node = va_list_type_node; | |
6056 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
6057 | } | |
1cae46be | 6058 | |
dce22712 | 6059 | if (!flag_preprocess_only) |
6060 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
ffa8918b | 6061 | |
5c62f199 | 6062 | main_identifier_node = get_identifier ("main"); |
ae84079f | 6063 | |
6064 | /* Create the built-in __null node. It is important that this is | |
6065 | not shared. */ | |
271e739a | 6066 | null_node = make_int_cst (1, 1); |
ae84079f | 6067 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); |
27213ba3 | 6068 | |
6069 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
6070 | memset (builtin_types, 0, sizeof (builtin_types)); | |
72040e7e | 6071 | } |
a66c9326 | 6072 | |
79b01846 | 6073 | /* The number of named compound-literals generated thus far. */ |
6074 | static GTY(()) int compound_literal_number; | |
6075 | ||
6076 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
6077 | ||
6078 | void | |
6079 | set_compound_literal_name (tree decl) | |
6080 | { | |
6081 | char *name; | |
6082 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
6083 | compound_literal_number); | |
6084 | compound_literal_number++; | |
6085 | DECL_NAME (decl) = get_identifier (name); | |
6086 | } | |
6087 | ||
2e474820 | 6088 | /* build_va_arg helper function. Return a VA_ARG_EXPR with location LOC, type |
6089 | TYPE and operand OP. */ | |
6090 | ||
6091 | static tree | |
6092 | build_va_arg_1 (location_t loc, tree type, tree op) | |
6093 | { | |
6094 | tree expr = build1 (VA_ARG_EXPR, type, op); | |
6095 | SET_EXPR_LOCATION (expr, loc); | |
6096 | return expr; | |
6097 | } | |
6098 | ||
6099 | /* Return a VA_ARG_EXPR corresponding to a source-level expression | |
6100 | va_arg (EXPR, TYPE) at source location LOC. */ | |
6101 | ||
a66c9326 | 6102 | tree |
e60a6f7b | 6103 | build_va_arg (location_t loc, tree expr, tree type) |
a66c9326 | 6104 | { |
c37be9ec | 6105 | tree va_type = TREE_TYPE (expr); |
6106 | tree canon_va_type = (va_type == error_mark_node | |
6107 | ? NULL_TREE | |
6108 | : targetm.canonical_va_list_type (va_type)); | |
6109 | ||
2e474820 | 6110 | if (va_type == error_mark_node |
6111 | || canon_va_type == NULL_TREE) | |
c37be9ec | 6112 | { |
2e474820 | 6113 | /* Let's handle things neutrallly, if expr: |
6114 | - has undeclared type, or | |
6115 | - is not an va_list type. */ | |
6116 | return build_va_arg_1 (loc, type, expr); | |
c37be9ec | 6117 | } |
f7fec1c7 | 6118 | |
2e474820 | 6119 | if (TREE_CODE (canon_va_type) != ARRAY_TYPE) |
6120 | { | |
6121 | /* Case 1: Not an array type. */ | |
6122 | ||
6123 | /* Take the address, to get '&ap'. */ | |
6124 | mark_addressable (expr); | |
6125 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (expr)), expr); | |
6126 | ||
6127 | /* Verify that &ap is still recognized as having va_list type. */ | |
6128 | tree canon_expr_type | |
6129 | = targetm.canonical_va_list_type (TREE_TYPE (expr)); | |
6130 | gcc_assert (canon_expr_type != NULL_TREE); | |
6131 | ||
6132 | return build_va_arg_1 (loc, type, expr); | |
6133 | } | |
6134 | ||
6135 | /* Case 2: Array type. | |
6136 | ||
6137 | Background: | |
6138 | ||
6139 | For contrast, let's start with the simple case (case 1). If | |
6140 | canon_va_type is not an array type, but say a char *, then when | |
6141 | passing-by-value a va_list, the type of the va_list param decl is | |
6142 | the same as for another va_list decl (all ap's are char *): | |
6143 | ||
6144 | f2_1 (char * ap) | |
6145 | D.1815 = VA_ARG (&ap, 0B, 1); | |
6146 | return D.1815; | |
6147 | ||
6148 | f2 (int i) | |
6149 | char * ap.0; | |
6150 | char * ap; | |
6151 | __builtin_va_start (&ap, 0); | |
6152 | ap.0 = ap; | |
6153 | res = f2_1 (ap.0); | |
6154 | __builtin_va_end (&ap); | |
6155 | D.1812 = res; | |
6156 | return D.1812; | |
6157 | ||
6158 | However, if canon_va_type is ARRAY_TYPE, then when passing-by-value a | |
6159 | va_list the type of the va_list param decl (case 2b, struct * ap) is not | |
6160 | the same as for another va_list decl (case 2a, struct ap[1]). | |
6161 | ||
6162 | f2_1 (struct * ap) | |
6163 | D.1844 = VA_ARG (ap, 0B, 0); | |
6164 | return D.1844; | |
6165 | ||
6166 | f2 (int i) | |
6167 | struct ap[1]; | |
6168 | __builtin_va_start (&ap, 0); | |
6169 | res = f2_1 (&ap); | |
6170 | __builtin_va_end (&ap); | |
6171 | D.1841 = res; | |
6172 | return D.1841; | |
6173 | ||
6174 | Case 2b is different because: | |
6175 | - on the callee side, the parm decl has declared type va_list, but | |
6176 | grokdeclarator changes the type of the parm decl to a pointer to the | |
6177 | array elem type. | |
6178 | - on the caller side, the pass-by-value uses &ap. | |
6179 | ||
6180 | We unify these two cases (case 2a: va_list is array type, | |
6181 | case 2b: va_list is pointer to array elem type), by adding '&' for the | |
6182 | array type case, such that we have a pointer to array elem in both | |
6183 | cases. */ | |
6184 | ||
6185 | if (TREE_CODE (va_type) == ARRAY_TYPE) | |
6186 | { | |
6187 | /* Case 2a: va_list is array type. */ | |
6188 | ||
6189 | /* Take the address, to get '&ap'. Make sure it's a pointer to array | |
6190 | elem type. */ | |
6191 | mark_addressable (expr); | |
6192 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (canon_va_type)), | |
6193 | expr); | |
6194 | ||
6195 | /* Verify that &ap is still recognized as having va_list type. */ | |
6196 | tree canon_expr_type | |
6197 | = targetm.canonical_va_list_type (TREE_TYPE (expr)); | |
6198 | gcc_assert (canon_expr_type != NULL_TREE); | |
6199 | } | |
6200 | else | |
6201 | { | |
6202 | /* Case 2b: va_list is pointer to array elem type. */ | |
6203 | gcc_assert (POINTER_TYPE_P (va_type)); | |
6204 | gcc_assert (TREE_TYPE (va_type) == TREE_TYPE (canon_va_type)); | |
6205 | ||
6206 | /* Don't take the address. We've already got '&ap'. */ | |
6207 | ; | |
6208 | } | |
6209 | ||
6210 | return build_va_arg_1 (loc, type, expr); | |
a66c9326 | 6211 | } |
0d4238dc | 6212 | |
6213 | ||
dd878098 | 6214 | /* Linked list of disabled built-in functions. */ |
6215 | ||
6216 | typedef struct disabled_builtin | |
6217 | { | |
6218 | const char *name; | |
6219 | struct disabled_builtin *next; | |
6220 | } disabled_builtin; | |
6221 | static disabled_builtin *disabled_builtins = NULL; | |
6222 | ||
1cae46be | 6223 | static bool builtin_function_disabled_p (const char *); |
dd878098 | 6224 | |
6225 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
6226 | begins with "__builtin_", give an error. */ | |
6227 | ||
6228 | void | |
1cae46be | 6229 | disable_builtin_function (const char *name) |
dd878098 | 6230 | { |
6231 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
b0b1af64 | 6232 | error ("cannot disable built-in function %qs", name); |
dd878098 | 6233 | else |
6234 | { | |
e85905e5 | 6235 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
6236 | new_disabled_builtin->name = name; | |
6237 | new_disabled_builtin->next = disabled_builtins; | |
6238 | disabled_builtins = new_disabled_builtin; | |
dd878098 | 6239 | } |
6240 | } | |
6241 | ||
6242 | ||
6243 | /* Return true if the built-in function NAME has been disabled, false | |
6244 | otherwise. */ | |
6245 | ||
6246 | static bool | |
1cae46be | 6247 | builtin_function_disabled_p (const char *name) |
dd878098 | 6248 | { |
6249 | disabled_builtin *p; | |
6250 | for (p = disabled_builtins; p != NULL; p = p->next) | |
6251 | { | |
6252 | if (strcmp (name, p->name) == 0) | |
6253 | return true; | |
6254 | } | |
6255 | return false; | |
6256 | } | |
6257 | ||
6258 | ||
3237155d | 6259 | /* Worker for DEF_BUILTIN. |
6260 | Possibly define a builtin function with one or two names. | |
6261 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
6262 | nonansi_p and flag_no_nonansi_builtin. */ | |
0d4238dc | 6263 | |
3237155d | 6264 | static void |
6265 | def_builtin_1 (enum built_in_function fncode, | |
6266 | const char *name, | |
6267 | enum built_in_class fnclass, | |
6268 | tree fntype, tree libtype, | |
6269 | bool both_p, bool fallback_p, bool nonansi_p, | |
6270 | tree fnattrs, bool implicit_p) | |
0d4238dc | 6271 | { |
3237155d | 6272 | tree decl; |
6273 | const char *libname; | |
6274 | ||
27213ba3 | 6275 | if (fntype == error_mark_node) |
6276 | return; | |
6277 | ||
3237155d | 6278 | gcc_assert ((!both_p && !fallback_p) |
6279 | || !strncmp (name, "__builtin_", | |
6280 | strlen ("__builtin_"))); | |
6281 | ||
6282 | libname = name + strlen ("__builtin_"); | |
54be5d7e | 6283 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
6284 | (fallback_p ? libname : NULL), | |
6285 | fnattrs); | |
b9a16870 | 6286 | |
6287 | set_builtin_decl (fncode, decl, implicit_p); | |
6288 | ||
3237155d | 6289 | if (both_p |
6290 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
dd878098 | 6291 | && !(nonansi_p && flag_no_nonansi_builtin)) |
54be5d7e | 6292 | add_builtin_function (libname, libtype, fncode, fnclass, |
6293 | NULL, fnattrs); | |
0d4238dc | 6294 | } |
e94026da | 6295 | \f |
d7aeef06 | 6296 | /* Nonzero if the type T promotes to int. This is (nearly) the |
6297 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
6298 | ||
6299 | bool | |
9f627b1a | 6300 | c_promoting_integer_type_p (const_tree t) |
d7aeef06 | 6301 | { |
6302 | switch (TREE_CODE (t)) | |
6303 | { | |
6304 | case INTEGER_TYPE: | |
6305 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
6306 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
6307 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
6308 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
7aa1e6eb | 6309 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
6310 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d7aeef06 | 6311 | |
6312 | case ENUMERAL_TYPE: | |
6313 | /* ??? Technically all enumerations not larger than an int | |
6314 | promote to an int. But this is used along code paths | |
6315 | that only want to notice a size change. */ | |
6316 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
6317 | ||
6318 | case BOOLEAN_TYPE: | |
6319 | return 1; | |
6320 | ||
6321 | default: | |
6322 | return 0; | |
6323 | } | |
6324 | } | |
6325 | ||
e94026da | 6326 | /* Return 1 if PARMS specifies a fixed number of parameters |
6327 | and none of their types is affected by default promotions. */ | |
6328 | ||
6329 | int | |
9f627b1a | 6330 | self_promoting_args_p (const_tree parms) |
e94026da | 6331 | { |
9f627b1a | 6332 | const_tree t; |
e94026da | 6333 | for (t = parms; t; t = TREE_CHAIN (t)) |
6334 | { | |
19cb6b50 | 6335 | tree type = TREE_VALUE (t); |
43f74bc4 | 6336 | |
e1d8e198 | 6337 | if (type == error_mark_node) |
6338 | continue; | |
6339 | ||
e94026da | 6340 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
6341 | return 0; | |
6342 | ||
6343 | if (type == 0) | |
6344 | return 0; | |
6345 | ||
6346 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
6347 | return 0; | |
6348 | ||
d7aeef06 | 6349 | if (c_promoting_integer_type_p (type)) |
e94026da | 6350 | return 0; |
6351 | } | |
6352 | return 1; | |
6353 | } | |
605fb01e | 6354 | |
c10de5e7 | 6355 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
6356 | tree | |
6357 | strip_pointer_operator (tree t) | |
6358 | { | |
6359 | while (POINTER_TYPE_P (t)) | |
6360 | t = TREE_TYPE (t); | |
6361 | return t; | |
6362 | } | |
6363 | ||
57a0ed23 | 6364 | /* Recursively remove pointer or array type from TYPE. */ |
6365 | tree | |
6366 | strip_pointer_or_array_types (tree t) | |
6367 | { | |
6368 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
6369 | t = TREE_TYPE (t); | |
6370 | return t; | |
6371 | } | |
6372 | ||
e41f0d80 | 6373 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
6374 | representing case labels, or NULL_TREE for a `default' label. | |
6375 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
6376 | K2, and 0 if K1 and K2 are equal. */ | |
6377 | ||
6378 | int | |
1cae46be | 6379 | case_compare (splay_tree_key k1, splay_tree_key k2) |
e41f0d80 | 6380 | { |
6381 | /* Consider a NULL key (such as arises with a `default' label) to be | |
6382 | smaller than anything else. */ | |
6383 | if (!k1) | |
6384 | return k2 ? -1 : 0; | |
6385 | else if (!k2) | |
6386 | return k1 ? 1 : 0; | |
6387 | ||
6388 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
6389 | } | |
6390 | ||
e60a6f7b | 6391 | /* Process a case label, located at LOC, for the range LOW_VALUE |
6392 | ... HIGH_VALUE. If LOW_VALUE and HIGH_VALUE are both NULL_TREE | |
6393 | then this case label is actually a `default' label. If only | |
6394 | HIGH_VALUE is NULL_TREE, then case label was declared using the | |
6395 | usual C/C++ syntax, rather than the GNU case range extension. | |
6396 | CASES is a tree containing all the case ranges processed so far; | |
6397 | COND is the condition for the switch-statement itself. Returns the | |
6398 | CASE_LABEL_EXPR created, or ERROR_MARK_NODE if no CASE_LABEL_EXPR | |
6399 | is created. */ | |
e41f0d80 | 6400 | |
6401 | tree | |
e60a6f7b | 6402 | c_add_case_label (location_t loc, splay_tree cases, tree cond, tree orig_type, |
2ca392fd | 6403 | tree low_value, tree high_value) |
e41f0d80 | 6404 | { |
6405 | tree type; | |
6406 | tree label; | |
6407 | tree case_label; | |
6408 | splay_tree_node node; | |
6409 | ||
6410 | /* Create the LABEL_DECL itself. */ | |
e60a6f7b | 6411 | label = create_artificial_label (loc); |
e41f0d80 | 6412 | |
6413 | /* If there was an error processing the switch condition, bail now | |
6414 | before we get more confused. */ | |
6415 | if (!cond || cond == error_mark_node) | |
4ee9c684 | 6416 | goto error_out; |
e41f0d80 | 6417 | |
1cae46be | 6418 | if ((low_value && TREE_TYPE (low_value) |
6419 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
e41f0d80 | 6420 | || (high_value && TREE_TYPE (high_value) |
6421 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
b96dc121 | 6422 | { |
e60a6f7b | 6423 | error_at (loc, "pointers are not permitted as case values"); |
b96dc121 | 6424 | goto error_out; |
6425 | } | |
e41f0d80 | 6426 | |
6427 | /* Case ranges are a GNU extension. */ | |
8864917d | 6428 | if (high_value) |
29438999 | 6429 | pedwarn (loc, OPT_Wpedantic, |
8864917d | 6430 | "range expressions in switch statements are non-standard"); |
e41f0d80 | 6431 | |
6432 | type = TREE_TYPE (cond); | |
6433 | if (low_value) | |
6434 | { | |
2d2f6a15 | 6435 | low_value = check_case_value (loc, low_value); |
22a75734 | 6436 | low_value = convert_and_check (loc, type, low_value); |
96722196 | 6437 | if (low_value == error_mark_node) |
6438 | goto error_out; | |
e41f0d80 | 6439 | } |
6440 | if (high_value) | |
6441 | { | |
2d2f6a15 | 6442 | high_value = check_case_value (loc, high_value); |
22a75734 | 6443 | high_value = convert_and_check (loc, type, high_value); |
96722196 | 6444 | if (high_value == error_mark_node) |
6445 | goto error_out; | |
e41f0d80 | 6446 | } |
6447 | ||
96722196 | 6448 | if (low_value && high_value) |
6449 | { | |
6450 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
a0c938f0 | 6451 | really a case range, even though it was written that way. |
6452 | Remove the HIGH_VALUE to simplify later processing. */ | |
96722196 | 6453 | if (tree_int_cst_equal (low_value, high_value)) |
6454 | high_value = NULL_TREE; | |
6455 | else if (!tree_int_cst_lt (low_value, high_value)) | |
e60a6f7b | 6456 | warning_at (loc, 0, "empty range specified"); |
96722196 | 6457 | } |
e41f0d80 | 6458 | |
2ca392fd | 6459 | /* See if the case is in range of the type of the original testing |
6460 | expression. If both low_value and high_value are out of range, | |
6461 | don't insert the case label and return NULL_TREE. */ | |
6462 | if (low_value | |
f61a9bc2 | 6463 | && !check_case_bounds (loc, type, orig_type, |
84166705 | 6464 | &low_value, high_value ? &high_value : NULL)) |
2ca392fd | 6465 | return NULL_TREE; |
6466 | ||
e41f0d80 | 6467 | /* Look up the LOW_VALUE in the table of case labels we already |
6468 | have. */ | |
6469 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
6470 | /* If there was not an exact match, check for overlapping ranges. | |
6471 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
6472 | that's a `default' label and the only overlap is an exact match. */ | |
6473 | if (!node && (low_value || high_value)) | |
6474 | { | |
6475 | splay_tree_node low_bound; | |
6476 | splay_tree_node high_bound; | |
6477 | ||
6478 | /* Even though there wasn't an exact match, there might be an | |
6479 | overlap between this case range and another case range. | |
6480 | Since we've (inductively) not allowed any overlapping case | |
6481 | ranges, we simply need to find the greatest low case label | |
6482 | that is smaller that LOW_VALUE, and the smallest low case | |
6483 | label that is greater than LOW_VALUE. If there is an overlap | |
6484 | it will occur in one of these two ranges. */ | |
6485 | low_bound = splay_tree_predecessor (cases, | |
6486 | (splay_tree_key) low_value); | |
6487 | high_bound = splay_tree_successor (cases, | |
6488 | (splay_tree_key) low_value); | |
6489 | ||
6490 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
6491 | the LOW_VALUE, so there is no need to check unless the | |
6492 | LOW_BOUND is in fact itself a case range. */ | |
6493 | if (low_bound | |
6494 | && CASE_HIGH ((tree) low_bound->value) | |
6495 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
6496 | low_value) >= 0) | |
6497 | node = low_bound; | |
6498 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
6499 | range is bigger than the low end of the current range, so we | |
6500 | are only interested if the current range is a real range, and | |
6501 | not an ordinary case label. */ | |
1cae46be | 6502 | else if (high_bound |
e41f0d80 | 6503 | && high_value |
6504 | && (tree_int_cst_compare ((tree) high_bound->key, | |
6505 | high_value) | |
6506 | <= 0)) | |
6507 | node = high_bound; | |
6508 | } | |
6509 | /* If there was an overlap, issue an error. */ | |
6510 | if (node) | |
6511 | { | |
eaae3b75 | 6512 | tree duplicate = CASE_LABEL ((tree) node->value); |
e41f0d80 | 6513 | |
6514 | if (high_value) | |
6515 | { | |
e60a6f7b | 6516 | error_at (loc, "duplicate (or overlapping) case value"); |
6517 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6518 | "this is the first entry overlapping that value"); | |
e41f0d80 | 6519 | } |
6520 | else if (low_value) | |
6521 | { | |
e60a6f7b | 6522 | error_at (loc, "duplicate case value") ; |
6523 | error_at (DECL_SOURCE_LOCATION (duplicate), "previously used here"); | |
e41f0d80 | 6524 | } |
6525 | else | |
6526 | { | |
e60a6f7b | 6527 | error_at (loc, "multiple default labels in one switch"); |
6528 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6529 | "this is the first default label"); | |
e41f0d80 | 6530 | } |
4ee9c684 | 6531 | goto error_out; |
e41f0d80 | 6532 | } |
6533 | ||
6534 | /* Add a CASE_LABEL to the statement-tree. */ | |
b6e3dd65 | 6535 | case_label = add_stmt (build_case_label (low_value, high_value, label)); |
e41f0d80 | 6536 | /* Register this case label in the splay tree. */ |
1cae46be | 6537 | splay_tree_insert (cases, |
e41f0d80 | 6538 | (splay_tree_key) low_value, |
6539 | (splay_tree_value) case_label); | |
6540 | ||
6541 | return case_label; | |
4ee9c684 | 6542 | |
6543 | error_out: | |
daf6dff5 | 6544 | /* Add a label so that the back-end doesn't think that the beginning of |
4ee9c684 | 6545 | the switch is unreachable. Note that we do not add a case label, as |
a53ff4c1 | 6546 | that just leads to duplicates and thence to failure later on. */ |
4ee9c684 | 6547 | if (!cases->root) |
6548 | { | |
e60a6f7b | 6549 | tree t = create_artificial_label (loc); |
6550 | add_stmt (build_stmt (loc, LABEL_EXPR, t)); | |
4ee9c684 | 6551 | } |
6552 | return error_mark_node; | |
6553 | } | |
6554 | ||
6555 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
6556 | Used to verify that case values match up with enumerator values. */ | |
6557 | ||
6558 | static void | |
6559 | match_case_to_enum_1 (tree key, tree type, tree label) | |
6560 | { | |
e913b5cd | 6561 | char buf[WIDE_INT_PRINT_BUFFER_SIZE]; |
6562 | ||
dd76621f | 6563 | if (tree_fits_uhwi_p (key)) |
6564 | print_dec (key, buf, UNSIGNED); | |
6565 | else if (tree_fits_shwi_p (key)) | |
6566 | print_dec (key, buf, SIGNED); | |
4ee9c684 | 6567 | else |
e913b5cd | 6568 | print_hex (key, buf); |
4ee9c684 | 6569 | |
6570 | if (TYPE_NAME (type) == 0) | |
712d2297 | 6571 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6572 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6573 | "case value %qs not in enumerated type", | |
6574 | buf); | |
4ee9c684 | 6575 | else |
712d2297 | 6576 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6577 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6578 | "case value %qs not in enumerated type %qT", | |
6579 | buf, type); | |
4ee9c684 | 6580 | } |
6581 | ||
359d87c6 | 6582 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
6583 | Used to verify that case values match up with enumerator values. */ | |
6584 | ||
4ee9c684 | 6585 | static int |
6586 | match_case_to_enum (splay_tree_node node, void *data) | |
6587 | { | |
6588 | tree label = (tree) node->value; | |
4fd61bc6 | 6589 | tree type = (tree) data; |
4ee9c684 | 6590 | |
6591 | /* Skip default case. */ | |
6592 | if (!CASE_LOW (label)) | |
6593 | return 0; | |
6594 | ||
359d87c6 | 6595 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
4ee9c684 | 6596 | when we did our enum->case scan. Reset our scratch bit after. */ |
359d87c6 | 6597 | if (!CASE_LOW_SEEN (label)) |
4ee9c684 | 6598 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
6599 | else | |
359d87c6 | 6600 | CASE_LOW_SEEN (label) = 0; |
4ee9c684 | 6601 | |
359d87c6 | 6602 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
6603 | not set, that means that CASE_HIGH did not appear when we did our | |
6604 | enum->case scan. Reset our scratch bit after. */ | |
4ee9c684 | 6605 | if (CASE_HIGH (label)) |
6606 | { | |
359d87c6 | 6607 | if (!CASE_HIGH_SEEN (label)) |
6608 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
6609 | else | |
6610 | CASE_HIGH_SEEN (label) = 0; | |
4ee9c684 | 6611 | } |
6612 | ||
6613 | return 0; | |
6614 | } | |
6615 | ||
e7911019 | 6616 | /* Handle -Wswitch*. Called from the front end after parsing the |
6617 | switch construct. */ | |
6618 | /* ??? Should probably be somewhere generic, since other languages | |
6619 | besides C and C++ would want this. At the moment, however, C/C++ | |
6620 | are the only tree-ssa languages that support enumerations at all, | |
6621 | so the point is moot. */ | |
4ee9c684 | 6622 | |
e7911019 | 6623 | void |
6624 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
6625 | tree type, tree cond) | |
4ee9c684 | 6626 | { |
b27ac6b5 | 6627 | splay_tree_node default_node; |
359d87c6 | 6628 | splay_tree_node node; |
6629 | tree chain; | |
4ee9c684 | 6630 | |
6631 | if (!warn_switch && !warn_switch_enum && !warn_switch_default) | |
6632 | return; | |
6633 | ||
4ee9c684 | 6634 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
8b6866af | 6635 | if (!default_node) |
5fb6a912 | 6636 | warning_at (switch_location, OPT_Wswitch_default, |
6637 | "switch missing default case"); | |
4ee9c684 | 6638 | |
359d87c6 | 6639 | /* From here on, we only care about about enumerated types. */ |
6640 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) | |
6641 | return; | |
6642 | ||
561017b5 | 6643 | /* From here on, we only care about -Wswitch and -Wswitch-enum. */ |
6644 | if (!warn_switch_enum && !warn_switch) | |
359d87c6 | 6645 | return; |
6646 | ||
561017b5 | 6647 | /* Check the cases. Warn about case values which are not members of |
6648 | the enumerated type. For -Wswitch-enum, or for -Wswitch when | |
6649 | there is no default case, check that exactly all enumeration | |
6650 | literals are covered by the cases. */ | |
6651 | ||
359d87c6 | 6652 | /* Clearing COND if it is not an integer constant simplifies |
6653 | the tests inside the loop below. */ | |
6654 | if (TREE_CODE (cond) != INTEGER_CST) | |
6655 | cond = NULL_TREE; | |
6656 | ||
6657 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
6658 | common case of monotonically increasing enumerators, it is | |
6659 | O(N), since the nature of the splay tree will keep the next | |
6660 | element adjacent to the root at all times. */ | |
4ee9c684 | 6661 | |
359d87c6 | 6662 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
6663 | { | |
6664 | tree value = TREE_VALUE (chain); | |
3f00a6c0 | 6665 | if (TREE_CODE (value) == CONST_DECL) |
6666 | value = DECL_INITIAL (value); | |
359d87c6 | 6667 | node = splay_tree_lookup (cases, (splay_tree_key) value); |
6668 | if (node) | |
4ee9c684 | 6669 | { |
359d87c6 | 6670 | /* Mark the CASE_LOW part of the case entry as seen. */ |
6671 | tree label = (tree) node->value; | |
6672 | CASE_LOW_SEEN (label) = 1; | |
6673 | continue; | |
6674 | } | |
6675 | ||
6676 | /* Even though there wasn't an exact match, there might be a | |
f0b5f617 | 6677 | case range which includes the enumerator's value. */ |
359d87c6 | 6678 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
6679 | if (node && CASE_HIGH ((tree) node->value)) | |
6680 | { | |
6681 | tree label = (tree) node->value; | |
6682 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
6683 | if (cmp >= 0) | |
4ee9c684 | 6684 | { |
359d87c6 | 6685 | /* If we match the upper bound exactly, mark the CASE_HIGH |
6686 | part of the case entry as seen. */ | |
6687 | if (cmp == 0) | |
6688 | CASE_HIGH_SEEN (label) = 1; | |
6689 | continue; | |
4ee9c684 | 6690 | } |
6691 | } | |
6692 | ||
359d87c6 | 6693 | /* We've now determined that this enumerated literal isn't |
6694 | handled by the case labels of the switch statement. */ | |
4ee9c684 | 6695 | |
359d87c6 | 6696 | /* If the switch expression is a constant, we only really care |
6697 | about whether that constant is handled by the switch. */ | |
6698 | if (cond && tree_int_cst_compare (cond, value)) | |
6699 | continue; | |
4ee9c684 | 6700 | |
6cbbbc89 | 6701 | /* If there is a default_node, the only relevant option is |
561017b5 | 6702 | Wswitch-enum. Otherwise, if both are enabled then we prefer |
6cbbbc89 | 6703 | to warn using -Wswitch because -Wswitch is enabled by -Wall |
6704 | while -Wswitch-enum is explicit. */ | |
561017b5 | 6705 | warning_at (switch_location, |
6706 | (default_node || !warn_switch | |
6707 | ? OPT_Wswitch_enum | |
6708 | : OPT_Wswitch), | |
6709 | "enumeration value %qE not handled in switch", | |
6710 | TREE_PURPOSE (chain)); | |
4ee9c684 | 6711 | } |
359d87c6 | 6712 | |
6713 | /* Warn if there are case expressions that don't correspond to | |
6714 | enumerators. This can occur since C and C++ don't enforce | |
6715 | type-checking of assignments to enumeration variables. | |
6716 | ||
6717 | The time complexity here is now always O(N) worst case, since | |
6718 | we should have marked both the lower bound and upper bound of | |
6719 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
6720 | above. This scan also resets those fields. */ | |
6cbbbc89 | 6721 | |
359d87c6 | 6722 | splay_tree_foreach (cases, match_case_to_enum, type); |
e41f0d80 | 6723 | } |
6724 | ||
9dd48740 | 6725 | /* Finish an expression taking the address of LABEL (an |
dda49785 | 6726 | IDENTIFIER_NODE). Returns an expression for the address. |
6727 | ||
6728 | LOC is the location for the expression returned. */ | |
d0a47c8d | 6729 | |
1cae46be | 6730 | tree |
dda49785 | 6731 | finish_label_address_expr (tree label, location_t loc) |
d0a47c8d | 6732 | { |
6733 | tree result; | |
6734 | ||
29438999 | 6735 | pedwarn (input_location, OPT_Wpedantic, "taking the address of a label is non-standard"); |
d0a47c8d | 6736 | |
9dd48740 | 6737 | if (label == error_mark_node) |
6738 | return error_mark_node; | |
6739 | ||
d0a47c8d | 6740 | label = lookup_label (label); |
6741 | if (label == NULL_TREE) | |
6742 | result = null_pointer_node; | |
6743 | else | |
6744 | { | |
6745 | TREE_USED (label) = 1; | |
6746 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
344cd9b2 | 6747 | /* The current function is not necessarily uninlinable. |
d0a47c8d | 6748 | Computed gotos are incompatible with inlining, but the value |
6749 | here could be used only in a diagnostic, for example. */ | |
dda49785 | 6750 | protected_set_expr_location (result, loc); |
d0a47c8d | 6751 | } |
6752 | ||
6753 | return result; | |
6754 | } | |
4f9a1c9b | 6755 | \f |
6756 | ||
6757 | /* Given a boolean expression ARG, return a tree representing an increment | |
6758 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
6759 | invalid cases (e.g., decrement in C++). */ | |
6760 | tree | |
1cae46be | 6761 | boolean_increment (enum tree_code code, tree arg) |
4f9a1c9b | 6762 | { |
6763 | tree val; | |
69db191c | 6764 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
c0f19401 | 6765 | |
4f9a1c9b | 6766 | arg = stabilize_reference (arg); |
6767 | switch (code) | |
6768 | { | |
6769 | case PREINCREMENT_EXPR: | |
14ae0310 | 6770 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 6771 | break; |
6772 | case POSTINCREMENT_EXPR: | |
14ae0310 | 6773 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 6774 | arg = save_expr (arg); |
14ae0310 | 6775 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6776 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 6777 | break; |
6778 | case PREDECREMENT_EXPR: | |
14ae0310 | 6779 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 6780 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 6781 | break; |
6782 | case POSTDECREMENT_EXPR: | |
14ae0310 | 6783 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 6784 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 6785 | arg = save_expr (arg); |
14ae0310 | 6786 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6787 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 6788 | break; |
6789 | default: | |
231bd014 | 6790 | gcc_unreachable (); |
4f9a1c9b | 6791 | } |
6792 | TREE_SIDE_EFFECTS (val) = 1; | |
6793 | return val; | |
6794 | } | |
76a6e674 | 6795 | \f |
f3449a3c | 6796 | /* Built-in macros for stddef.h and stdint.h, that require macros |
6797 | defined in this file. */ | |
79cf3ec1 | 6798 | void |
1cae46be | 6799 | c_stddef_cpp_builtins(void) |
1ed9d5f5 | 6800 | { |
63994318 | 6801 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
6802 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
6803 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
6804 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
36bccbfc | 6805 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
6806 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
b0726616 | 6807 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
6808 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
f3449a3c | 6809 | if (SIG_ATOMIC_TYPE) |
6810 | builtin_define_with_value ("__SIG_ATOMIC_TYPE__", SIG_ATOMIC_TYPE, 0); | |
6811 | if (INT8_TYPE) | |
6812 | builtin_define_with_value ("__INT8_TYPE__", INT8_TYPE, 0); | |
6813 | if (INT16_TYPE) | |
6814 | builtin_define_with_value ("__INT16_TYPE__", INT16_TYPE, 0); | |
6815 | if (INT32_TYPE) | |
6816 | builtin_define_with_value ("__INT32_TYPE__", INT32_TYPE, 0); | |
6817 | if (INT64_TYPE) | |
6818 | builtin_define_with_value ("__INT64_TYPE__", INT64_TYPE, 0); | |
6819 | if (UINT8_TYPE) | |
6820 | builtin_define_with_value ("__UINT8_TYPE__", UINT8_TYPE, 0); | |
6821 | if (UINT16_TYPE) | |
6822 | builtin_define_with_value ("__UINT16_TYPE__", UINT16_TYPE, 0); | |
6823 | if (UINT32_TYPE) | |
6824 | builtin_define_with_value ("__UINT32_TYPE__", UINT32_TYPE, 0); | |
6825 | if (UINT64_TYPE) | |
6826 | builtin_define_with_value ("__UINT64_TYPE__", UINT64_TYPE, 0); | |
6827 | if (INT_LEAST8_TYPE) | |
6828 | builtin_define_with_value ("__INT_LEAST8_TYPE__", INT_LEAST8_TYPE, 0); | |
6829 | if (INT_LEAST16_TYPE) | |
6830 | builtin_define_with_value ("__INT_LEAST16_TYPE__", INT_LEAST16_TYPE, 0); | |
6831 | if (INT_LEAST32_TYPE) | |
6832 | builtin_define_with_value ("__INT_LEAST32_TYPE__", INT_LEAST32_TYPE, 0); | |
6833 | if (INT_LEAST64_TYPE) | |
6834 | builtin_define_with_value ("__INT_LEAST64_TYPE__", INT_LEAST64_TYPE, 0); | |
6835 | if (UINT_LEAST8_TYPE) | |
6836 | builtin_define_with_value ("__UINT_LEAST8_TYPE__", UINT_LEAST8_TYPE, 0); | |
6837 | if (UINT_LEAST16_TYPE) | |
6838 | builtin_define_with_value ("__UINT_LEAST16_TYPE__", UINT_LEAST16_TYPE, 0); | |
6839 | if (UINT_LEAST32_TYPE) | |
6840 | builtin_define_with_value ("__UINT_LEAST32_TYPE__", UINT_LEAST32_TYPE, 0); | |
6841 | if (UINT_LEAST64_TYPE) | |
6842 | builtin_define_with_value ("__UINT_LEAST64_TYPE__", UINT_LEAST64_TYPE, 0); | |
6843 | if (INT_FAST8_TYPE) | |
6844 | builtin_define_with_value ("__INT_FAST8_TYPE__", INT_FAST8_TYPE, 0); | |
6845 | if (INT_FAST16_TYPE) | |
6846 | builtin_define_with_value ("__INT_FAST16_TYPE__", INT_FAST16_TYPE, 0); | |
6847 | if (INT_FAST32_TYPE) | |
6848 | builtin_define_with_value ("__INT_FAST32_TYPE__", INT_FAST32_TYPE, 0); | |
6849 | if (INT_FAST64_TYPE) | |
6850 | builtin_define_with_value ("__INT_FAST64_TYPE__", INT_FAST64_TYPE, 0); | |
6851 | if (UINT_FAST8_TYPE) | |
6852 | builtin_define_with_value ("__UINT_FAST8_TYPE__", UINT_FAST8_TYPE, 0); | |
6853 | if (UINT_FAST16_TYPE) | |
6854 | builtin_define_with_value ("__UINT_FAST16_TYPE__", UINT_FAST16_TYPE, 0); | |
6855 | if (UINT_FAST32_TYPE) | |
6856 | builtin_define_with_value ("__UINT_FAST32_TYPE__", UINT_FAST32_TYPE, 0); | |
6857 | if (UINT_FAST64_TYPE) | |
6858 | builtin_define_with_value ("__UINT_FAST64_TYPE__", UINT_FAST64_TYPE, 0); | |
6859 | if (INTPTR_TYPE) | |
6860 | builtin_define_with_value ("__INTPTR_TYPE__", INTPTR_TYPE, 0); | |
6861 | if (UINTPTR_TYPE) | |
6862 | builtin_define_with_value ("__UINTPTR_TYPE__", UINTPTR_TYPE, 0); | |
574006c3 | 6863 | } |
6864 | ||
7d3b509a | 6865 | static void |
1cae46be | 6866 | c_init_attributes (void) |
7d3b509a | 6867 | { |
6868 | /* Fill in the built_in_attributes array. */ | |
7c446c95 | 6869 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
7d3b509a | 6870 | built_in_attributes[(int) ENUM] = NULL_TREE; |
7c446c95 | 6871 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
ceb7b692 | 6872 | built_in_attributes[(int) ENUM] = build_int_cst (integer_type_node, VALUE); |
c8010b80 | 6873 | #define DEF_ATTR_STRING(ENUM, VALUE) \ |
6874 | built_in_attributes[(int) ENUM] = build_string (strlen (VALUE), VALUE); | |
7d3b509a | 6875 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
6876 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
6877 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
6878 | built_in_attributes[(int) ENUM] \ | |
6879 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
6880 | built_in_attributes[(int) VALUE], \ | |
6881 | built_in_attributes[(int) CHAIN]); | |
7d3b509a | 6882 | #include "builtin-attrs.def" |
6883 | #undef DEF_ATTR_NULL_TREE | |
6884 | #undef DEF_ATTR_INT | |
6885 | #undef DEF_ATTR_IDENT | |
6886 | #undef DEF_ATTR_TREE_LIST | |
76a6e674 | 6887 | } |
5f3cead1 | 6888 | |
33199a81 | 6889 | /* Returns TRUE iff the attribute indicated by ATTR_ID takes a plain |
6890 | identifier as an argument, so the front end shouldn't look it up. */ | |
6891 | ||
6892 | bool | |
47b19b94 | 6893 | attribute_takes_identifier_p (const_tree attr_id) |
33199a81 | 6894 | { |
9bf1c74e | 6895 | const struct attribute_spec *spec = lookup_attribute_spec (attr_id); |
02cb1060 | 6896 | if (spec == NULL) |
6897 | /* Unknown attribute that we'll end up ignoring, return true so we | |
6898 | don't complain about an identifier argument. */ | |
6899 | return true; | |
6900 | else if (!strcmp ("mode", spec->name) | |
6901 | || !strcmp ("format", spec->name) | |
6902 | || !strcmp ("cleanup", spec->name)) | |
47b19b94 | 6903 | return true; |
6904 | else | |
6905 | return targetm.attribute_takes_identifier_p (attr_id); | |
33199a81 | 6906 | } |
6907 | ||
f8e93a2e | 6908 | /* Attribute handlers common to C front ends. */ |
6909 | ||
6910 | /* Handle a "packed" attribute; arguments as in | |
6911 | struct attribute_spec.handler. */ | |
6912 | ||
6913 | static tree | |
9a03a746 | 6914 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
09347743 | 6915 | int flags, bool *no_add_attrs) |
f8e93a2e | 6916 | { |
f40175cb | 6917 | if (TYPE_P (*node)) |
f8e93a2e | 6918 | { |
6919 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 6920 | *node = build_variant_type_copy (*node); |
f40175cb | 6921 | TYPE_PACKED (*node) = 1; |
f8e93a2e | 6922 | } |
6923 | else if (TREE_CODE (*node) == FIELD_DECL) | |
c2ab04f9 | 6924 | { |
9fd767c5 | 6925 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT |
6926 | /* Still pack bitfields. */ | |
6927 | && ! DECL_INITIAL (*node)) | |
c2ab04f9 | 6928 | warning (OPT_Wattributes, |
6929 | "%qE attribute ignored for field of type %qT", | |
6930 | name, TREE_TYPE (*node)); | |
6931 | else | |
6932 | DECL_PACKED (*node) = 1; | |
6933 | } | |
f8e93a2e | 6934 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
f40175cb | 6935 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
6936 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
6937 | that changes what the typedef is typing. */ | |
f8e93a2e | 6938 | else |
6939 | { | |
9b2d6d13 | 6940 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6941 | *no_add_attrs = true; |
6942 | } | |
6943 | ||
6944 | return NULL_TREE; | |
6945 | } | |
6946 | ||
6947 | /* Handle a "nocommon" attribute; arguments as in | |
6948 | struct attribute_spec.handler. */ | |
6949 | ||
6950 | static tree | |
1cae46be | 6951 | handle_nocommon_attribute (tree *node, tree name, |
9a03a746 | 6952 | tree ARG_UNUSED (args), |
6953 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6954 | { |
6955 | if (TREE_CODE (*node) == VAR_DECL) | |
6956 | DECL_COMMON (*node) = 0; | |
6957 | else | |
6958 | { | |
9b2d6d13 | 6959 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6960 | *no_add_attrs = true; |
6961 | } | |
6962 | ||
6963 | return NULL_TREE; | |
6964 | } | |
6965 | ||
6966 | /* Handle a "common" attribute; arguments as in | |
6967 | struct attribute_spec.handler. */ | |
6968 | ||
6969 | static tree | |
9a03a746 | 6970 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6971 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6972 | { |
6973 | if (TREE_CODE (*node) == VAR_DECL) | |
6974 | DECL_COMMON (*node) = 1; | |
6975 | else | |
6976 | { | |
9b2d6d13 | 6977 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6978 | *no_add_attrs = true; |
6979 | } | |
6980 | ||
6981 | return NULL_TREE; | |
6982 | } | |
6983 | ||
6984 | /* Handle a "noreturn" attribute; arguments as in | |
6985 | struct attribute_spec.handler. */ | |
6986 | ||
6987 | static tree | |
9a03a746 | 6988 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6989 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6990 | { |
6991 | tree type = TREE_TYPE (*node); | |
6992 | ||
6993 | /* See FIXME comment in c_common_attribute_table. */ | |
8c582e4f | 6994 | if (TREE_CODE (*node) == FUNCTION_DECL |
6995 | || objc_method_decl (TREE_CODE (*node))) | |
f8e93a2e | 6996 | TREE_THIS_VOLATILE (*node) = 1; |
6997 | else if (TREE_CODE (type) == POINTER_TYPE | |
6998 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
6999 | TREE_TYPE (*node) | |
9d4eeb52 | 7000 | = (build_qualified_type |
7001 | (build_pointer_type | |
7002 | (build_type_variant (TREE_TYPE (type), | |
7003 | TYPE_READONLY (TREE_TYPE (type)), 1)), | |
7004 | TYPE_QUALS (type))); | |
f8e93a2e | 7005 | else |
7006 | { | |
9b2d6d13 | 7007 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7008 | *no_add_attrs = true; |
7009 | } | |
7010 | ||
7011 | return NULL_TREE; | |
7012 | } | |
7013 | ||
5de92639 | 7014 | /* Handle a "hot" and attribute; arguments as in |
7015 | struct attribute_spec.handler. */ | |
7016 | ||
7017 | static tree | |
7018 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
46f8e3b0 | 7019 | int ARG_UNUSED (flags), bool *no_add_attrs) |
5de92639 | 7020 | { |
758a38ab | 7021 | if (TREE_CODE (*node) == FUNCTION_DECL |
7022 | || TREE_CODE (*node) == LABEL_DECL) | |
5de92639 | 7023 | { |
7024 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
7025 | { | |
4a026b48 | 7026 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
7027 | "with attribute %qs", name, "cold"); | |
5de92639 | 7028 | *no_add_attrs = true; |
7029 | } | |
24470055 | 7030 | /* Most of the rest of the hot processing is done later with |
7031 | lookup_attribute. */ | |
5de92639 | 7032 | } |
7033 | else | |
7034 | { | |
7035 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7036 | *no_add_attrs = true; | |
7037 | } | |
7038 | ||
7039 | return NULL_TREE; | |
7040 | } | |
758a38ab | 7041 | |
5de92639 | 7042 | /* Handle a "cold" and attribute; arguments as in |
7043 | struct attribute_spec.handler. */ | |
7044 | ||
7045 | static tree | |
7046 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
7047 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7048 | { | |
758a38ab | 7049 | if (TREE_CODE (*node) == FUNCTION_DECL |
7050 | || TREE_CODE (*node) == LABEL_DECL) | |
5de92639 | 7051 | { |
7052 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
7053 | { | |
4a026b48 | 7054 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
7055 | "with attribute %qs", name, "hot"); | |
5de92639 | 7056 | *no_add_attrs = true; |
7057 | } | |
24470055 | 7058 | /* Most of the rest of the cold processing is done later with |
7059 | lookup_attribute. */ | |
5de92639 | 7060 | } |
7061 | else | |
7062 | { | |
7063 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7064 | *no_add_attrs = true; | |
7065 | } | |
7066 | ||
7067 | return NULL_TREE; | |
7068 | } | |
7069 | ||
a9196da9 | 7070 | /* Handle a "no_sanitize_address" attribute; arguments as in |
d413ffdd | 7071 | struct attribute_spec.handler. */ |
7072 | ||
7073 | static tree | |
a9196da9 | 7074 | handle_no_sanitize_address_attribute (tree *node, tree name, tree, int, |
7075 | bool *no_add_attrs) | |
d413ffdd | 7076 | { |
7077 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7078 | { | |
7079 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7080 | *no_add_attrs = true; | |
7081 | } | |
7082 | ||
7083 | return NULL_TREE; | |
7084 | } | |
7085 | ||
a9196da9 | 7086 | /* Handle a "no_address_safety_analysis" attribute; arguments as in |
7087 | struct attribute_spec.handler. */ | |
7088 | ||
7089 | static tree | |
7090 | handle_no_address_safety_analysis_attribute (tree *node, tree name, tree, int, | |
7091 | bool *no_add_attrs) | |
7092 | { | |
7093 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7094 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7095 | else if (!lookup_attribute ("no_sanitize_address", DECL_ATTRIBUTES (*node))) | |
7096 | DECL_ATTRIBUTES (*node) | |
7097 | = tree_cons (get_identifier ("no_sanitize_address"), | |
7098 | NULL_TREE, DECL_ATTRIBUTES (*node)); | |
7099 | *no_add_attrs = true; | |
7100 | return NULL_TREE; | |
7101 | } | |
7102 | ||
05f893e1 | 7103 | /* Handle a "no_sanitize_undefined" attribute; arguments as in |
7104 | struct attribute_spec.handler. */ | |
7105 | ||
7106 | static tree | |
7107 | handle_no_sanitize_undefined_attribute (tree *node, tree name, tree, int, | |
7108 | bool *no_add_attrs) | |
7109 | { | |
7110 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7111 | { | |
7112 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7113 | *no_add_attrs = true; | |
7114 | } | |
7115 | ||
7116 | return NULL_TREE; | |
7117 | } | |
7118 | ||
947aa916 | 7119 | /* Handle a "stack_protect" attribute; arguments as in |
7120 | struct attribute_spec.handler. */ | |
7121 | static tree | |
7122 | handle_stack_protect_attribute (tree *node, tree name, tree, int, | |
7123 | bool *no_add_attrs) | |
7124 | { | |
7125 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7126 | { | |
7127 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7128 | *no_add_attrs = true; | |
7129 | } | |
7130 | else | |
7131 | DECL_ATTRIBUTES (*node) | |
7132 | = tree_cons (get_identifier ("stack_protect"), | |
7133 | NULL_TREE, DECL_ATTRIBUTES (*node)); | |
7134 | ||
7135 | return NULL_TREE; | |
7136 | } | |
7137 | ||
f8e93a2e | 7138 | /* Handle a "noinline" attribute; arguments as in |
7139 | struct attribute_spec.handler. */ | |
7140 | ||
7141 | static tree | |
1cae46be | 7142 | handle_noinline_attribute (tree *node, tree name, |
9a03a746 | 7143 | tree ARG_UNUSED (args), |
7144 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7145 | { |
7146 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
4a026b48 | 7147 | { |
7148 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (*node))) | |
7149 | { | |
7150 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
7151 | "with attribute %qs", name, "always_inline"); | |
7152 | *no_add_attrs = true; | |
7153 | } | |
7154 | else | |
7155 | DECL_UNINLINABLE (*node) = 1; | |
7156 | } | |
f8e93a2e | 7157 | else |
7158 | { | |
9b2d6d13 | 7159 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7160 | *no_add_attrs = true; |
7161 | } | |
7162 | ||
7163 | return NULL_TREE; | |
7164 | } | |
7165 | ||
bdb1f0d1 | 7166 | /* Handle a "noclone" attribute; arguments as in |
7167 | struct attribute_spec.handler. */ | |
7168 | ||
7169 | static tree | |
7170 | handle_noclone_attribute (tree *node, tree name, | |
7171 | tree ARG_UNUSED (args), | |
7172 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7173 | { | |
7174 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7175 | { | |
7176 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7177 | *no_add_attrs = true; | |
7178 | } | |
7179 | ||
7180 | return NULL_TREE; | |
7181 | } | |
7182 | ||
85fbea97 | 7183 | /* Handle a "no_icf" attribute; arguments as in |
7184 | struct attribute_spec.handler. */ | |
7185 | ||
7186 | static tree | |
7187 | handle_noicf_attribute (tree *node, tree name, | |
7188 | tree ARG_UNUSED (args), | |
7189 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7190 | { | |
7191 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7192 | { | |
7193 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7194 | *no_add_attrs = true; | |
7195 | } | |
7196 | ||
7197 | return NULL_TREE; | |
7198 | } | |
7199 | ||
7200 | ||
f8e93a2e | 7201 | /* Handle a "always_inline" attribute; arguments as in |
7202 | struct attribute_spec.handler. */ | |
7203 | ||
7204 | static tree | |
1cae46be | 7205 | handle_always_inline_attribute (tree *node, tree name, |
9a03a746 | 7206 | tree ARG_UNUSED (args), |
7207 | int ARG_UNUSED (flags), | |
09347743 | 7208 | bool *no_add_attrs) |
f8e93a2e | 7209 | { |
7210 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7211 | { | |
4a026b48 | 7212 | if (lookup_attribute ("noinline", DECL_ATTRIBUTES (*node))) |
7213 | { | |
7214 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
7215 | "with %qs attribute", name, "noinline"); | |
7216 | *no_add_attrs = true; | |
7217 | } | |
7218 | else | |
7219 | /* Set the attribute and mark it for disregarding inline | |
7220 | limits. */ | |
7221 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
f8e93a2e | 7222 | } |
7223 | else | |
7224 | { | |
9b2d6d13 | 7225 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7226 | *no_add_attrs = true; |
541e4101 | 7227 | } |
7228 | ||
7229 | return NULL_TREE; | |
7230 | } | |
7231 | ||
7232 | /* Handle a "gnu_inline" attribute; arguments as in | |
7233 | struct attribute_spec.handler. */ | |
7234 | ||
7235 | static tree | |
7236 | handle_gnu_inline_attribute (tree *node, tree name, | |
7237 | tree ARG_UNUSED (args), | |
7238 | int ARG_UNUSED (flags), | |
7239 | bool *no_add_attrs) | |
7240 | { | |
7241 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
7242 | { | |
7243 | /* Do nothing else, just set the attribute. We'll get at | |
7244 | it later with lookup_attribute. */ | |
7245 | } | |
7246 | else | |
7247 | { | |
7248 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7249 | *no_add_attrs = true; | |
7bd95dfd | 7250 | } |
7251 | ||
7252 | return NULL_TREE; | |
7253 | } | |
7254 | ||
7255 | /* Handle a "leaf" attribute; arguments as in | |
7256 | struct attribute_spec.handler. */ | |
7257 | ||
7258 | static tree | |
7259 | handle_leaf_attribute (tree *node, tree name, | |
7260 | tree ARG_UNUSED (args), | |
7261 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7262 | { | |
7263 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7264 | { | |
7265 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7266 | *no_add_attrs = true; | |
7267 | } | |
7268 | if (!TREE_PUBLIC (*node)) | |
7269 | { | |
7270 | warning (OPT_Wattributes, "%qE attribute has no effect on unit local functions", name); | |
7271 | *no_add_attrs = true; | |
f8e93a2e | 7272 | } |
7273 | ||
7274 | return NULL_TREE; | |
7275 | } | |
7276 | ||
1b16fc45 | 7277 | /* Handle an "artificial" attribute; arguments as in |
7278 | struct attribute_spec.handler. */ | |
7279 | ||
7280 | static tree | |
7281 | handle_artificial_attribute (tree *node, tree name, | |
7282 | tree ARG_UNUSED (args), | |
7283 | int ARG_UNUSED (flags), | |
7284 | bool *no_add_attrs) | |
7285 | { | |
7286 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
7287 | { | |
7288 | /* Do nothing else, just set the attribute. We'll get at | |
7289 | it later with lookup_attribute. */ | |
7290 | } | |
7291 | else | |
7292 | { | |
7293 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7294 | *no_add_attrs = true; | |
7295 | } | |
7296 | ||
7297 | return NULL_TREE; | |
7298 | } | |
7299 | ||
0cdd9887 | 7300 | /* Handle a "flatten" attribute; arguments as in |
7301 | struct attribute_spec.handler. */ | |
7302 | ||
7303 | static tree | |
7304 | handle_flatten_attribute (tree *node, tree name, | |
a0c938f0 | 7305 | tree args ATTRIBUTE_UNUSED, |
7306 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0cdd9887 | 7307 | { |
7308 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7309 | /* Do nothing else, just set the attribute. We'll get at | |
7310 | it later with lookup_attribute. */ | |
7311 | ; | |
7312 | else | |
7313 | { | |
7314 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7315 | *no_add_attrs = true; | |
7316 | } | |
7317 | ||
7318 | return NULL_TREE; | |
7319 | } | |
7320 | ||
10fc867f | 7321 | /* Handle a "warning" or "error" attribute; arguments as in |
7322 | struct attribute_spec.handler. */ | |
7323 | ||
7324 | static tree | |
7325 | handle_error_attribute (tree *node, tree name, tree args, | |
7326 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7327 | { | |
7328 | if (TREE_CODE (*node) == FUNCTION_DECL | |
df936998 | 7329 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) |
10fc867f | 7330 | /* Do nothing else, just set the attribute. We'll get at |
7331 | it later with lookup_attribute. */ | |
7332 | ; | |
7333 | else | |
7334 | { | |
7335 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7336 | *no_add_attrs = true; | |
7337 | } | |
7338 | ||
7339 | return NULL_TREE; | |
7340 | } | |
0cdd9887 | 7341 | |
f8e93a2e | 7342 | /* Handle a "used" attribute; arguments as in |
7343 | struct attribute_spec.handler. */ | |
7344 | ||
7345 | static tree | |
9a03a746 | 7346 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
7347 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7348 | { |
d0a31bd8 | 7349 | tree node = *pnode; |
7350 | ||
7351 | if (TREE_CODE (node) == FUNCTION_DECL | |
a4e3ffad | 7352 | || (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node)) |
7353 | || (TREE_CODE (node) == TYPE_DECL)) | |
f54ed8bc | 7354 | { |
f54ed8bc | 7355 | TREE_USED (node) = 1; |
9423c9b7 | 7356 | DECL_PRESERVE_P (node) = 1; |
abc6c64f | 7357 | if (TREE_CODE (node) == VAR_DECL) |
7358 | DECL_READ_P (node) = 1; | |
f54ed8bc | 7359 | } |
f8e93a2e | 7360 | else |
7361 | { | |
9b2d6d13 | 7362 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7363 | *no_add_attrs = true; |
7364 | } | |
7365 | ||
7366 | return NULL_TREE; | |
7367 | } | |
7368 | ||
7369 | /* Handle a "unused" attribute; arguments as in | |
7370 | struct attribute_spec.handler. */ | |
7371 | ||
7372 | static tree | |
9a03a746 | 7373 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7374 | int flags, bool *no_add_attrs) | |
f8e93a2e | 7375 | { |
7376 | if (DECL_P (*node)) | |
7377 | { | |
7378 | tree decl = *node; | |
7379 | ||
7380 | if (TREE_CODE (decl) == PARM_DECL | |
7381 | || TREE_CODE (decl) == VAR_DECL | |
7382 | || TREE_CODE (decl) == FUNCTION_DECL | |
7383 | || TREE_CODE (decl) == LABEL_DECL | |
7384 | || TREE_CODE (decl) == TYPE_DECL) | |
abc6c64f | 7385 | { |
7386 | TREE_USED (decl) = 1; | |
7387 | if (TREE_CODE (decl) == VAR_DECL | |
7388 | || TREE_CODE (decl) == PARM_DECL) | |
7389 | DECL_READ_P (decl) = 1; | |
7390 | } | |
f8e93a2e | 7391 | else |
7392 | { | |
9b2d6d13 | 7393 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7394 | *no_add_attrs = true; |
7395 | } | |
7396 | } | |
7397 | else | |
7398 | { | |
7399 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 7400 | *node = build_variant_type_copy (*node); |
f8e93a2e | 7401 | TREE_USED (*node) = 1; |
7402 | } | |
7403 | ||
7404 | return NULL_TREE; | |
7405 | } | |
7406 | ||
62eec3b4 | 7407 | /* Handle a "externally_visible" attribute; arguments as in |
7408 | struct attribute_spec.handler. */ | |
7409 | ||
7410 | static tree | |
7411 | handle_externally_visible_attribute (tree *pnode, tree name, | |
7412 | tree ARG_UNUSED (args), | |
7413 | int ARG_UNUSED (flags), | |
7414 | bool *no_add_attrs) | |
7415 | { | |
7416 | tree node = *pnode; | |
7417 | ||
b443c459 | 7418 | if (VAR_OR_FUNCTION_DECL_P (node)) |
62eec3b4 | 7419 | { |
ba12ea31 | 7420 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
7421 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
7422 | { | |
7423 | warning (OPT_Wattributes, | |
7424 | "%qE attribute have effect only on public objects", name); | |
7425 | *no_add_attrs = true; | |
7426 | } | |
62eec3b4 | 7427 | } |
62eec3b4 | 7428 | else |
7429 | { | |
7430 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7431 | *no_add_attrs = true; | |
7432 | } | |
7433 | ||
7434 | return NULL_TREE; | |
7435 | } | |
7436 | ||
6b722052 | 7437 | /* Handle the "no_reorder" attribute. Arguments as in |
7438 | struct attribute_spec.handler. */ | |
7439 | ||
7440 | static tree | |
7441 | handle_no_reorder_attribute (tree *pnode, | |
7442 | tree name, | |
7443 | tree, | |
7444 | int, | |
7445 | bool *no_add_attrs) | |
7446 | { | |
7447 | tree node = *pnode; | |
7448 | ||
b443c459 | 7449 | if (!VAR_OR_FUNCTION_DECL_P (node) |
6b722052 | 7450 | && !(TREE_STATIC (node) || DECL_EXTERNAL (node))) |
7451 | { | |
7452 | warning (OPT_Wattributes, | |
7453 | "%qE attribute only affects top level objects", | |
7454 | name); | |
7455 | *no_add_attrs = true; | |
7456 | } | |
7457 | ||
7458 | return NULL_TREE; | |
7459 | } | |
7460 | ||
f8e93a2e | 7461 | /* Handle a "const" attribute; arguments as in |
7462 | struct attribute_spec.handler. */ | |
7463 | ||
7464 | static tree | |
9a03a746 | 7465 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7466 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7467 | { |
7468 | tree type = TREE_TYPE (*node); | |
7469 | ||
7470 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
7471 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7472 | TREE_READONLY (*node) = 1; | |
7473 | else if (TREE_CODE (type) == POINTER_TYPE | |
7474 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
7475 | TREE_TYPE (*node) | |
9d4eeb52 | 7476 | = (build_qualified_type |
7477 | (build_pointer_type | |
7478 | (build_type_variant (TREE_TYPE (type), 1, | |
7479 | TREE_THIS_VOLATILE (TREE_TYPE (type)))), | |
7480 | TYPE_QUALS (type))); | |
f8e93a2e | 7481 | else |
7482 | { | |
9b2d6d13 | 7483 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7484 | *no_add_attrs = true; |
7485 | } | |
7486 | ||
7487 | return NULL_TREE; | |
7488 | } | |
7489 | ||
7490 | /* Handle a "transparent_union" attribute; arguments as in | |
7491 | struct attribute_spec.handler. */ | |
7492 | ||
7493 | static tree | |
1cae46be | 7494 | handle_transparent_union_attribute (tree *node, tree name, |
9a03a746 | 7495 | tree ARG_UNUSED (args), int flags, |
09347743 | 7496 | bool *no_add_attrs) |
f8e93a2e | 7497 | { |
881eb642 | 7498 | tree type; |
03908818 | 7499 | |
7500 | *no_add_attrs = true; | |
f8e93a2e | 7501 | |
ffcdbf9c | 7502 | |
7503 | if (TREE_CODE (*node) == TYPE_DECL | |
7504 | && ! (flags & ATTR_FLAG_CXX11)) | |
881eb642 | 7505 | node = &TREE_TYPE (*node); |
7506 | type = *node; | |
f8e93a2e | 7507 | |
03908818 | 7508 | if (TREE_CODE (type) == UNION_TYPE) |
f8e93a2e | 7509 | { |
fca86134 | 7510 | /* Make sure that the first field will work for a transparent union. |
7511 | If the type isn't complete yet, leave the check to the code in | |
7512 | finish_struct. */ | |
7513 | if (TYPE_SIZE (type)) | |
7514 | { | |
7515 | tree first = first_field (type); | |
7516 | if (first == NULL_TREE | |
7517 | || DECL_ARTIFICIAL (first) | |
7518 | || TYPE_MODE (type) != DECL_MODE (first)) | |
7519 | goto ignored; | |
7520 | } | |
7521 | ||
f8e93a2e | 7522 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
03908818 | 7523 | { |
fca86134 | 7524 | /* If the type isn't complete yet, setting the flag |
7525 | on a variant wouldn't ever be checked. */ | |
7526 | if (!TYPE_SIZE (type)) | |
7527 | goto ignored; | |
7528 | ||
7529 | /* build_duplicate_type doesn't work for C++. */ | |
7530 | if (c_dialect_cxx ()) | |
03908818 | 7531 | goto ignored; |
7532 | ||
7533 | /* A type variant isn't good enough, since we don't a cast | |
7534 | to such a type removed as a no-op. */ | |
7535 | *node = type = build_duplicate_type (type); | |
7536 | } | |
7537 | ||
8df5a43d | 7538 | TYPE_TRANSPARENT_AGGR (type) = 1; |
03908818 | 7539 | return NULL_TREE; |
f8e93a2e | 7540 | } |
7541 | ||
03908818 | 7542 | ignored: |
7543 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 7544 | return NULL_TREE; |
7545 | } | |
7546 | ||
9af7fd5b | 7547 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
7548 | get the requested priority for a constructor or destructor, | |
7549 | possibly issuing diagnostics for invalid or reserved | |
7550 | priorities. */ | |
7551 | ||
7552 | static priority_type | |
7553 | get_priority (tree args, bool is_destructor) | |
7554 | { | |
7555 | HOST_WIDE_INT pri; | |
6c181a06 | 7556 | tree arg; |
9af7fd5b | 7557 | |
7558 | if (!args) | |
7559 | return DEFAULT_INIT_PRIORITY; | |
48e1416a | 7560 | |
28fbc04f | 7561 | if (!SUPPORTS_INIT_PRIORITY) |
7562 | { | |
7563 | if (is_destructor) | |
7564 | error ("destructor priorities are not supported"); | |
7565 | else | |
7566 | error ("constructor priorities are not supported"); | |
7567 | return DEFAULT_INIT_PRIORITY; | |
7568 | } | |
7569 | ||
6c181a06 | 7570 | arg = TREE_VALUE (args); |
253e1cae | 7571 | if (TREE_CODE (arg) == IDENTIFIER_NODE) |
7572 | goto invalid; | |
7573 | if (arg == error_mark_node) | |
7574 | return DEFAULT_INIT_PRIORITY; | |
c28ddc97 | 7575 | arg = default_conversion (arg); |
e913b5cd | 7576 | if (!tree_fits_shwi_p (arg) |
6c181a06 | 7577 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) |
9af7fd5b | 7578 | goto invalid; |
7579 | ||
e913b5cd | 7580 | pri = tree_to_shwi (arg); |
9af7fd5b | 7581 | if (pri < 0 || pri > MAX_INIT_PRIORITY) |
7582 | goto invalid; | |
7583 | ||
7584 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
7585 | { | |
7586 | if (is_destructor) | |
7587 | warning (0, | |
7588 | "destructor priorities from 0 to %d are reserved " | |
48e1416a | 7589 | "for the implementation", |
9af7fd5b | 7590 | MAX_RESERVED_INIT_PRIORITY); |
7591 | else | |
7592 | warning (0, | |
7593 | "constructor priorities from 0 to %d are reserved " | |
48e1416a | 7594 | "for the implementation", |
9af7fd5b | 7595 | MAX_RESERVED_INIT_PRIORITY); |
7596 | } | |
7597 | return pri; | |
7598 | ||
7599 | invalid: | |
7600 | if (is_destructor) | |
7601 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
7602 | MAX_INIT_PRIORITY); | |
7603 | else | |
7604 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
7605 | MAX_INIT_PRIORITY); | |
7606 | return DEFAULT_INIT_PRIORITY; | |
7607 | } | |
7608 | ||
f8e93a2e | 7609 | /* Handle a "constructor" attribute; arguments as in |
7610 | struct attribute_spec.handler. */ | |
7611 | ||
7612 | static tree | |
9af7fd5b | 7613 | handle_constructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 7614 | int ARG_UNUSED (flags), |
09347743 | 7615 | bool *no_add_attrs) |
f8e93a2e | 7616 | { |
7617 | tree decl = *node; | |
7618 | tree type = TREE_TYPE (decl); | |
7619 | ||
7620 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7621 | && TREE_CODE (type) == FUNCTION_TYPE | |
7622 | && decl_function_context (decl) == 0) | |
7623 | { | |
9af7fd5b | 7624 | priority_type priority; |
f8e93a2e | 7625 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
9af7fd5b | 7626 | priority = get_priority (args, /*is_destructor=*/false); |
7627 | SET_DECL_INIT_PRIORITY (decl, priority); | |
f8e93a2e | 7628 | TREE_USED (decl) = 1; |
7629 | } | |
7630 | else | |
7631 | { | |
9b2d6d13 | 7632 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7633 | *no_add_attrs = true; |
7634 | } | |
7635 | ||
7636 | return NULL_TREE; | |
7637 | } | |
7638 | ||
7639 | /* Handle a "destructor" attribute; arguments as in | |
7640 | struct attribute_spec.handler. */ | |
7641 | ||
7642 | static tree | |
9af7fd5b | 7643 | handle_destructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 7644 | int ARG_UNUSED (flags), |
09347743 | 7645 | bool *no_add_attrs) |
f8e93a2e | 7646 | { |
7647 | tree decl = *node; | |
7648 | tree type = TREE_TYPE (decl); | |
7649 | ||
7650 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7651 | && TREE_CODE (type) == FUNCTION_TYPE | |
7652 | && decl_function_context (decl) == 0) | |
7653 | { | |
9af7fd5b | 7654 | priority_type priority; |
f8e93a2e | 7655 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
9af7fd5b | 7656 | priority = get_priority (args, /*is_destructor=*/true); |
7657 | SET_DECL_FINI_PRIORITY (decl, priority); | |
f8e93a2e | 7658 | TREE_USED (decl) = 1; |
7659 | } | |
7660 | else | |
7661 | { | |
9b2d6d13 | 7662 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7663 | *no_add_attrs = true; |
7664 | } | |
7665 | ||
7666 | return NULL_TREE; | |
7667 | } | |
7668 | ||
1c58e3f1 | 7669 | /* Nonzero if the mode is a valid vector mode for this architecture. |
7670 | This returns nonzero even if there is no hardware support for the | |
7671 | vector mode, but we can emulate with narrower modes. */ | |
7672 | ||
7673 | static int | |
3754d046 | 7674 | vector_mode_valid_p (machine_mode mode) |
1c58e3f1 | 7675 | { |
7676 | enum mode_class mclass = GET_MODE_CLASS (mode); | |
3754d046 | 7677 | machine_mode innermode; |
1c58e3f1 | 7678 | |
7679 | /* Doh! What's going on? */ | |
7680 | if (mclass != MODE_VECTOR_INT | |
7681 | && mclass != MODE_VECTOR_FLOAT | |
7682 | && mclass != MODE_VECTOR_FRACT | |
7683 | && mclass != MODE_VECTOR_UFRACT | |
7684 | && mclass != MODE_VECTOR_ACCUM | |
7685 | && mclass != MODE_VECTOR_UACCUM) | |
7686 | return 0; | |
7687 | ||
7688 | /* Hardware support. Woo hoo! */ | |
7689 | if (targetm.vector_mode_supported_p (mode)) | |
7690 | return 1; | |
7691 | ||
7692 | innermode = GET_MODE_INNER (mode); | |
7693 | ||
7694 | /* We should probably return 1 if requesting V4DI and we have no DI, | |
7695 | but we have V2DI, but this is probably very unlikely. */ | |
7696 | ||
7697 | /* If we have support for the inner mode, we can safely emulate it. | |
7698 | We may not have V2DI, but me can emulate with a pair of DIs. */ | |
7699 | return targetm.scalar_mode_supported_p (innermode); | |
7700 | } | |
7701 | ||
7702 | ||
f8e93a2e | 7703 | /* Handle a "mode" attribute; arguments as in |
7704 | struct attribute_spec.handler. */ | |
7705 | ||
7706 | static tree | |
9a03a746 | 7707 | handle_mode_attribute (tree *node, tree name, tree args, |
7708 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7709 | { |
7710 | tree type = *node; | |
d1dd9ac0 | 7711 | tree ident = TREE_VALUE (args); |
f8e93a2e | 7712 | |
7713 | *no_add_attrs = true; | |
ab2c1de8 | 7714 | |
d1dd9ac0 | 7715 | if (TREE_CODE (ident) != IDENTIFIER_NODE) |
9b2d6d13 | 7716 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7717 | else |
7718 | { | |
7719 | int j; | |
d1dd9ac0 | 7720 | const char *p = IDENTIFIER_POINTER (ident); |
f8e93a2e | 7721 | int len = strlen (p); |
3754d046 | 7722 | machine_mode mode = VOIDmode; |
f8e93a2e | 7723 | tree typefm; |
b2aef146 | 7724 | bool valid_mode; |
f8e93a2e | 7725 | |
7726 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
7727 | && p[len - 1] == '_' && p[len - 2] == '_') | |
7728 | { | |
4fd61bc6 | 7729 | char *newp = (char *) alloca (len - 1); |
f8e93a2e | 7730 | |
7731 | strcpy (newp, &p[2]); | |
7732 | newp[len - 4] = '\0'; | |
7733 | p = newp; | |
7734 | } | |
7735 | ||
7736 | /* Change this type to have a type with the specified mode. | |
7737 | First check for the special modes. */ | |
84166705 | 7738 | if (!strcmp (p, "byte")) |
f8e93a2e | 7739 | mode = byte_mode; |
7740 | else if (!strcmp (p, "word")) | |
7741 | mode = word_mode; | |
84166705 | 7742 | else if (!strcmp (p, "pointer")) |
f8e93a2e | 7743 | mode = ptr_mode; |
0ef89dfd | 7744 | else if (!strcmp (p, "libgcc_cmp_return")) |
7745 | mode = targetm.libgcc_cmp_return_mode (); | |
7746 | else if (!strcmp (p, "libgcc_shift_count")) | |
7747 | mode = targetm.libgcc_shift_count_mode (); | |
1bd43494 | 7748 | else if (!strcmp (p, "unwind_word")) |
7749 | mode = targetm.unwind_word_mode (); | |
f8e93a2e | 7750 | else |
7751 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
7752 | if (!strcmp (p, GET_MODE_NAME (j))) | |
743a6f47 | 7753 | { |
3754d046 | 7754 | mode = (machine_mode) j; |
743a6f47 | 7755 | break; |
7756 | } | |
f8e93a2e | 7757 | |
7758 | if (mode == VOIDmode) | |
4917c376 | 7759 | { |
d1dd9ac0 | 7760 | error ("unknown machine mode %qE", ident); |
4917c376 | 7761 | return NULL_TREE; |
7762 | } | |
7763 | ||
b2aef146 | 7764 | valid_mode = false; |
7765 | switch (GET_MODE_CLASS (mode)) | |
4917c376 | 7766 | { |
b2aef146 | 7767 | case MODE_INT: |
7768 | case MODE_PARTIAL_INT: | |
7769 | case MODE_FLOAT: | |
c4503c0a | 7770 | case MODE_DECIMAL_FLOAT: |
9421ebb9 | 7771 | case MODE_FRACT: |
7772 | case MODE_UFRACT: | |
7773 | case MODE_ACCUM: | |
7774 | case MODE_UACCUM: | |
b2aef146 | 7775 | valid_mode = targetm.scalar_mode_supported_p (mode); |
7776 | break; | |
7777 | ||
7778 | case MODE_COMPLEX_INT: | |
7779 | case MODE_COMPLEX_FLOAT: | |
7780 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
7781 | break; | |
7782 | ||
7783 | case MODE_VECTOR_INT: | |
7784 | case MODE_VECTOR_FLOAT: | |
9421ebb9 | 7785 | case MODE_VECTOR_FRACT: |
7786 | case MODE_VECTOR_UFRACT: | |
7787 | case MODE_VECTOR_ACCUM: | |
7788 | case MODE_VECTOR_UACCUM: | |
9b2d6d13 | 7789 | warning (OPT_Wattributes, "specifying vector types with " |
7790 | "__attribute__ ((mode)) is deprecated"); | |
7791 | warning (OPT_Wattributes, | |
7792 | "use __attribute__ ((vector_size)) instead"); | |
b2aef146 | 7793 | valid_mode = vector_mode_valid_p (mode); |
7794 | break; | |
4917c376 | 7795 | |
b2aef146 | 7796 | default: |
7797 | break; | |
7798 | } | |
7799 | if (!valid_mode) | |
7800 | { | |
1e5fcbe2 | 7801 | error ("unable to emulate %qs", p); |
b2aef146 | 7802 | return NULL_TREE; |
7803 | } | |
4917c376 | 7804 | |
b2aef146 | 7805 | if (POINTER_TYPE_P (type)) |
ead34f59 | 7806 | { |
6d5d708e | 7807 | addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type)); |
3754d046 | 7808 | tree (*fn)(tree, machine_mode, bool); |
b2aef146 | 7809 | |
6d5d708e | 7810 | if (!targetm.addr_space.valid_pointer_mode (mode, as)) |
ead34f59 | 7811 | { |
1e5fcbe2 | 7812 | error ("invalid pointer mode %qs", p); |
ead34f59 | 7813 | return NULL_TREE; |
7814 | } | |
7815 | ||
a0c938f0 | 7816 | if (TREE_CODE (type) == POINTER_TYPE) |
b2aef146 | 7817 | fn = build_pointer_type_for_mode; |
805e22b2 | 7818 | else |
b2aef146 | 7819 | fn = build_reference_type_for_mode; |
7820 | typefm = fn (TREE_TYPE (type), mode, false); | |
ead34f59 | 7821 | } |
b2aef146 | 7822 | else |
9421ebb9 | 7823 | { |
7824 | /* For fixed-point modes, we need to test if the signness of type | |
7825 | and the machine mode are consistent. */ | |
7826 | if (ALL_FIXED_POINT_MODE_P (mode) | |
7827 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
7828 | { | |
bf776685 | 7829 | error ("signedness of type and machine mode %qs don%'t match", p); |
9421ebb9 | 7830 | return NULL_TREE; |
7831 | } | |
7832 | /* For fixed-point modes, we need to pass saturating info. */ | |
7833 | typefm = lang_hooks.types.type_for_mode (mode, | |
7834 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
7835 | : TYPE_UNSIGNED (type)); | |
7836 | } | |
3a648ab9 | 7837 | |
b2aef146 | 7838 | if (typefm == NULL_TREE) |
7839 | { | |
743a6f47 | 7840 | error ("no data type for mode %qs", p); |
b2aef146 | 7841 | return NULL_TREE; |
7842 | } | |
3a648ab9 | 7843 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
7844 | { | |
7845 | /* For enumeral types, copy the precision from the integer | |
7846 | type returned above. If not an INTEGER_TYPE, we can't use | |
7847 | this mode for this type. */ | |
7848 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
7849 | { | |
743a6f47 | 7850 | error ("cannot use mode %qs for enumeral types", p); |
3a648ab9 | 7851 | return NULL_TREE; |
7852 | } | |
7853 | ||
10080eac | 7854 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
7855 | { | |
7856 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
7857 | typefm = type; | |
7858 | } | |
7859 | else | |
7860 | { | |
7861 | /* We cannot build a type variant, as there's code that assumes | |
7862 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
7863 | debug generators. Instead, create a subrange type. This | |
7864 | results in all of the enumeral values being emitted only once | |
7865 | in the original, and the subtype gets them by reference. */ | |
7866 | if (TYPE_UNSIGNED (type)) | |
7867 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
7868 | else | |
7869 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
7870 | TREE_TYPE (typefm) = type; | |
7871 | } | |
3a648ab9 | 7872 | } |
4bf450a1 | 7873 | else if (VECTOR_MODE_P (mode) |
7874 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
7875 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
743a6f47 | 7876 | { |
7877 | error ("mode %qs applied to inappropriate type", p); | |
7878 | return NULL_TREE; | |
7879 | } | |
7880 | ||
b2aef146 | 7881 | *node = typefm; |
f8e93a2e | 7882 | } |
7883 | ||
7884 | return NULL_TREE; | |
7885 | } | |
7886 | ||
7887 | /* Handle a "section" attribute; arguments as in | |
7888 | struct attribute_spec.handler. */ | |
7889 | ||
7890 | static tree | |
9a03a746 | 7891 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
7892 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7893 | { |
7894 | tree decl = *node; | |
7895 | ||
9866562d | 7896 | if (!targetm_common.have_named_sections) |
f8e93a2e | 7897 | { |
9866562d | 7898 | error_at (DECL_SOURCE_LOCATION (*node), |
7899 | "section attributes are not supported for this target"); | |
7900 | goto fail; | |
7901 | } | |
065efcb1 | 7902 | |
9866562d | 7903 | user_defined_section_attribute = true; |
f8e93a2e | 7904 | |
b443c459 | 7905 | if (!VAR_OR_FUNCTION_DECL_P (decl)) |
9866562d | 7906 | { |
7907 | error ("section attribute not allowed for %q+D", *node); | |
7908 | goto fail; | |
f8e93a2e | 7909 | } |
9866562d | 7910 | |
7911 | if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
f8e93a2e | 7912 | { |
9866562d | 7913 | error ("section attribute argument not a string constant"); |
7914 | goto fail; | |
f8e93a2e | 7915 | } |
7916 | ||
9866562d | 7917 | if (TREE_CODE (decl) == VAR_DECL |
7918 | && current_function_decl != NULL_TREE | |
7919 | && !TREE_STATIC (decl)) | |
7920 | { | |
7921 | error_at (DECL_SOURCE_LOCATION (decl), | |
7922 | "section attribute cannot be specified for local variables"); | |
7923 | goto fail; | |
7924 | } | |
7925 | ||
7926 | /* The decl may have already been given a section attribute | |
7927 | from a previous declaration. Ensure they match. */ | |
7928 | if (DECL_SECTION_NAME (decl) != NULL | |
7929 | && strcmp (DECL_SECTION_NAME (decl), | |
7930 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) | |
7931 | { | |
7932 | error ("section of %q+D conflicts with previous declaration", *node); | |
7933 | goto fail; | |
7934 | } | |
7935 | ||
7936 | if (TREE_CODE (decl) == VAR_DECL | |
7937 | && !targetm.have_tls && targetm.emutls.tmpl_section | |
7938 | && DECL_THREAD_LOCAL_P (decl)) | |
7939 | { | |
7940 | error ("section of %q+D cannot be overridden", *node); | |
7941 | goto fail; | |
7942 | } | |
7943 | ||
7944 | set_decl_section_name (decl, TREE_STRING_POINTER (TREE_VALUE (args))); | |
7945 | return NULL_TREE; | |
7946 | ||
7947 | fail: | |
7948 | *no_add_attrs = true; | |
f8e93a2e | 7949 | return NULL_TREE; |
7950 | } | |
7951 | ||
83e25171 | 7952 | /* Check whether ALIGN is a valid user-specified alignment. If so, |
7953 | return its base-2 log; if not, output an error and return -1. If | |
7954 | ALLOW_ZERO then 0 is valid and should result in a return of -1 with | |
7955 | no error. */ | |
7956 | int | |
7957 | check_user_alignment (const_tree align, bool allow_zero) | |
7958 | { | |
7959 | int i; | |
7960 | ||
3e5a8b00 | 7961 | if (error_operand_p (align)) |
7962 | return -1; | |
5abaa10a | 7963 | if (TREE_CODE (align) != INTEGER_CST |
7964 | || !INTEGRAL_TYPE_P (TREE_TYPE (align))) | |
83e25171 | 7965 | { |
7966 | error ("requested alignment is not an integer constant"); | |
7967 | return -1; | |
7968 | } | |
7969 | else if (allow_zero && integer_zerop (align)) | |
7970 | return -1; | |
1a087624 | 7971 | else if (tree_int_cst_sgn (align) == -1 |
7972 | || (i = tree_log2 (align)) == -1) | |
83e25171 | 7973 | { |
1a087624 | 7974 | error ("requested alignment is not a positive power of 2"); |
83e25171 | 7975 | return -1; |
7976 | } | |
7977 | else if (i >= HOST_BITS_PER_INT - BITS_PER_UNIT_LOG) | |
7978 | { | |
7979 | error ("requested alignment is too large"); | |
7980 | return -1; | |
7981 | } | |
7982 | return i; | |
7983 | } | |
7984 | ||
ffcdbf9c | 7985 | /* |
7986 | If in c++-11, check if the c++-11 alignment constraint with respect | |
7987 | to fundamental alignment (in [dcl.align]) are satisfied. If not in | |
7988 | c++-11 mode, does nothing. | |
7989 | ||
7990 | [dcl.align]2/ says: | |
7991 | ||
7992 | [* if the constant expression evaluates to a fundamental alignment, | |
7993 | the alignment requirement of the declared entity shall be the | |
7994 | specified fundamental alignment. | |
7995 | ||
7996 | * if the constant expression evaluates to an extended alignment | |
7997 | and the implementation supports that alignment in the context | |
7998 | of the declaration, the alignment of the declared entity shall | |
7999 | be that alignment | |
8000 | ||
8001 | * if the constant expression evaluates to an extended alignment | |
8002 | and the implementation does not support that alignment in the | |
8003 | context of the declaration, the program is ill-formed]. */ | |
8004 | ||
8005 | static bool | |
8006 | check_cxx_fundamental_alignment_constraints (tree node, | |
8007 | unsigned align_log, | |
8008 | int flags) | |
8009 | { | |
8010 | bool alignment_too_large_p = false; | |
8011 | unsigned requested_alignment = 1U << align_log; | |
8012 | unsigned max_align = 0; | |
8013 | ||
8014 | if ((!(flags & ATTR_FLAG_CXX11) && !warn_cxx_compat) | |
8015 | || (node == NULL_TREE || node == error_mark_node)) | |
8016 | return true; | |
8017 | ||
8018 | if (cxx_fundamental_alignment_p (requested_alignment)) | |
8019 | return true; | |
8020 | ||
8021 | if (DECL_P (node)) | |
8022 | { | |
8023 | if (TREE_STATIC (node)) | |
8024 | { | |
8025 | /* For file scope variables and static members, the target | |
8026 | supports alignments that are at most | |
8027 | MAX_OFILE_ALIGNMENT. */ | |
8028 | if (requested_alignment > (max_align = MAX_OFILE_ALIGNMENT)) | |
8029 | alignment_too_large_p = true; | |
8030 | } | |
8031 | else | |
8032 | { | |
8033 | #ifdef BIGGEST_FIELD_ALIGNMENT | |
8034 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_FIELD_ALIGNMENT | |
8035 | #else | |
8036 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_ALIGNMENT | |
8037 | #endif | |
8038 | /* For non-static members, the target supports either | |
8039 | alignments that at most either BIGGEST_FIELD_ALIGNMENT | |
8040 | if it is defined or BIGGEST_ALIGNMENT. */ | |
8041 | max_align = MAX_TARGET_FIELD_ALIGNMENT; | |
8042 | if (TREE_CODE (node) == FIELD_DECL | |
8043 | && requested_alignment > (max_align = MAX_TARGET_FIELD_ALIGNMENT)) | |
8044 | alignment_too_large_p = true; | |
8045 | #undef MAX_TARGET_FIELD_ALIGNMENT | |
8046 | /* For stack variables, the target supports at most | |
8047 | MAX_STACK_ALIGNMENT. */ | |
8048 | else if (decl_function_context (node) != NULL | |
8049 | && requested_alignment > (max_align = MAX_STACK_ALIGNMENT)) | |
8050 | alignment_too_large_p = true; | |
8051 | } | |
8052 | } | |
8053 | else if (TYPE_P (node)) | |
8054 | { | |
8055 | /* Let's be liberal for types. */ | |
8056 | if (requested_alignment > (max_align = BIGGEST_ALIGNMENT)) | |
8057 | alignment_too_large_p = true; | |
8058 | } | |
8059 | ||
8060 | if (alignment_too_large_p) | |
8061 | pedwarn (input_location, OPT_Wattributes, | |
8062 | "requested alignment %d is larger than %d", | |
8063 | requested_alignment, max_align); | |
8064 | ||
8065 | return !alignment_too_large_p; | |
8066 | } | |
8067 | ||
f8e93a2e | 8068 | /* Handle a "aligned" attribute; arguments as in |
8069 | struct attribute_spec.handler. */ | |
8070 | ||
8071 | static tree | |
9a03a746 | 8072 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
09347743 | 8073 | int flags, bool *no_add_attrs) |
f8e93a2e | 8074 | { |
8075 | tree decl = NULL_TREE; | |
8076 | tree *type = NULL; | |
8077 | int is_type = 0; | |
caf62483 | 8078 | tree align_expr; |
f8e93a2e | 8079 | int i; |
8080 | ||
caf62483 | 8081 | if (args) |
8082 | { | |
8083 | align_expr = TREE_VALUE (args); | |
3e5a8b00 | 8084 | if (align_expr && TREE_CODE (align_expr) != IDENTIFIER_NODE |
8085 | && TREE_CODE (align_expr) != FUNCTION_DECL) | |
caf62483 | 8086 | align_expr = default_conversion (align_expr); |
8087 | } | |
8088 | else | |
8089 | align_expr = size_int (ATTRIBUTE_ALIGNED_VALUE / BITS_PER_UNIT); | |
8090 | ||
f8e93a2e | 8091 | if (DECL_P (*node)) |
8092 | { | |
8093 | decl = *node; | |
8094 | type = &TREE_TYPE (decl); | |
8095 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
8096 | } | |
8097 | else if (TYPE_P (*node)) | |
8098 | type = node, is_type = 1; | |
8099 | ||
ffcdbf9c | 8100 | if ((i = check_user_alignment (align_expr, false)) == -1 |
8101 | || !check_cxx_fundamental_alignment_constraints (*node, i, flags)) | |
83e25171 | 8102 | *no_add_attrs = true; |
f8e93a2e | 8103 | else if (is_type) |
8104 | { | |
2ec3af9c | 8105 | if ((flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
8106 | /* OK, modify the type in place. */; | |
f8e93a2e | 8107 | /* If we have a TYPE_DECL, then copy the type, so that we |
8108 | don't accidentally modify a builtin type. See pushdecl. */ | |
2ec3af9c | 8109 | else if (decl && TREE_TYPE (decl) != error_mark_node |
8110 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
f8e93a2e | 8111 | { |
8112 | tree tt = TREE_TYPE (decl); | |
e086912e | 8113 | *type = build_variant_type_copy (*type); |
f8e93a2e | 8114 | DECL_ORIGINAL_TYPE (decl) = tt; |
8115 | TYPE_NAME (*type) = decl; | |
8116 | TREE_USED (*type) = TREE_USED (decl); | |
8117 | TREE_TYPE (decl) = *type; | |
8118 | } | |
2ec3af9c | 8119 | else |
e086912e | 8120 | *type = build_variant_type_copy (*type); |
f8e93a2e | 8121 | |
7cfdc2f0 | 8122 | TYPE_ALIGN (*type) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 8123 | TYPE_USER_ALIGN (*type) = 1; |
8124 | } | |
097b5c8b | 8125 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
f8e93a2e | 8126 | && TREE_CODE (decl) != FIELD_DECL) |
8127 | { | |
3cf8b391 | 8128 | error ("alignment may not be specified for %q+D", decl); |
f8e93a2e | 8129 | *no_add_attrs = true; |
8130 | } | |
ffcdbf9c | 8131 | else if (DECL_USER_ALIGN (decl) |
8132 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) | |
8133 | /* C++-11 [dcl.align/4]: | |
8134 | ||
8135 | When multiple alignment-specifiers are specified for an | |
8136 | entity, the alignment requirement shall be set to the | |
8137 | strictest specified alignment. | |
8138 | ||
8139 | This formally comes from the c++11 specification but we are | |
8140 | doing it for the GNU attribute syntax as well. */ | |
8141 | *no_add_attrs = true; | |
097b5c8b | 8142 | else if (TREE_CODE (decl) == FUNCTION_DECL |
7cfdc2f0 | 8143 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
097b5c8b | 8144 | { |
8145 | if (DECL_USER_ALIGN (decl)) | |
8146 | error ("alignment for %q+D was previously specified as %d " | |
8147 | "and may not be decreased", decl, | |
8148 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
8149 | else | |
8150 | error ("alignment for %q+D must be at least %d", decl, | |
8151 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
8152 | *no_add_attrs = true; | |
8153 | } | |
f8e93a2e | 8154 | else |
8155 | { | |
7cfdc2f0 | 8156 | DECL_ALIGN (decl) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 8157 | DECL_USER_ALIGN (decl) = 1; |
8158 | } | |
8159 | ||
8160 | return NULL_TREE; | |
8161 | } | |
8162 | ||
8163 | /* Handle a "weak" attribute; arguments as in | |
8164 | struct attribute_spec.handler. */ | |
8165 | ||
8166 | static tree | |
f948b309 | 8167 | handle_weak_attribute (tree *node, tree name, |
9a03a746 | 8168 | tree ARG_UNUSED (args), |
8169 | int ARG_UNUSED (flags), | |
8170 | bool * ARG_UNUSED (no_add_attrs)) | |
f8e93a2e | 8171 | { |
f948b309 | 8172 | if (TREE_CODE (*node) == FUNCTION_DECL |
059a60f3 | 8173 | && DECL_DECLARED_INLINE_P (*node)) |
8174 | { | |
0725e25c | 8175 | warning (OPT_Wattributes, "inline function %q+D declared weak", *node); |
059a60f3 | 8176 | *no_add_attrs = true; |
8177 | } | |
85c0a25c | 8178 | else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
8179 | { | |
8180 | error ("indirect function %q+D cannot be declared weak", *node); | |
8181 | *no_add_attrs = true; | |
8182 | return NULL_TREE; | |
8183 | } | |
b443c459 | 8184 | else if (VAR_OR_FUNCTION_DECL_P (*node)) |
c11b875d | 8185 | { |
8186 | struct symtab_node *n = symtab_node::get (*node); | |
8187 | if (n && n->refuse_visibility_changes) | |
8188 | error ("%+D declared weak after being used", *node); | |
8189 | declare_weak (*node); | |
8190 | } | |
f948b309 | 8191 | else |
8192 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 8193 | |
8194 | return NULL_TREE; | |
8195 | } | |
8196 | ||
4641882f | 8197 | /* Handle a "noplt" attribute; arguments as in |
8198 | struct attribute_spec.handler. */ | |
8199 | ||
8200 | static tree | |
8201 | handle_noplt_attribute (tree *node, tree name, | |
8202 | tree ARG_UNUSED (args), | |
8203 | int ARG_UNUSED (flags), | |
8204 | bool * ARG_UNUSED (no_add_attrs)) | |
8205 | { | |
8206 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8207 | { | |
8208 | warning (OPT_Wattributes, | |
8209 | "%qE attribute is only applicable on functions", name); | |
8210 | *no_add_attrs = true; | |
8211 | return NULL_TREE; | |
8212 | } | |
8213 | return NULL_TREE; | |
8214 | } | |
8215 | ||
85c0a25c | 8216 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
8217 | struct attribute_spec.handler, except that IS_ALIAS tells us | |
8218 | whether this is an alias as opposed to ifunc attribute. */ | |
f8e93a2e | 8219 | |
8220 | static tree | |
85c0a25c | 8221 | handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args, |
8222 | bool *no_add_attrs) | |
f8e93a2e | 8223 | { |
8224 | tree decl = *node; | |
8225 | ||
85c0a25c | 8226 | if (TREE_CODE (decl) != FUNCTION_DECL |
8227 | && (!is_alias || TREE_CODE (decl) != VAR_DECL)) | |
9e830260 | 8228 | { |
8229 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8230 | *no_add_attrs = true; | |
8231 | } | |
8232 | else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
48e1416a | 8233 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 8234 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) |
8235 | /* A static variable declaration is always a tentative definition, | |
8236 | but the alias is a non-tentative definition which overrides. */ | |
48e1416a | 8237 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 8238 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) |
f8e93a2e | 8239 | { |
85c0a25c | 8240 | error ("%q+D defined both normally and as %qE attribute", decl, name); |
f8e93a2e | 8241 | *no_add_attrs = true; |
85c0a25c | 8242 | return NULL_TREE; |
f8e93a2e | 8243 | } |
85c0a25c | 8244 | else if (!is_alias |
8245 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) | |
8246 | || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))) | |
8247 | { | |
8248 | error ("weak %q+D cannot be defined %qE", decl, name); | |
8249 | *no_add_attrs = true; | |
8250 | return NULL_TREE; | |
8251 | } | |
8c42f0d9 | 8252 | |
8253 | /* Note that the very first time we process a nested declaration, | |
8254 | decl_function_context will not be set. Indeed, *would* never | |
8255 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
8256 | we do below. After such frobbery, pushdecl would set the context. | |
8257 | In any case, this is never what we want. */ | |
8258 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
f8e93a2e | 8259 | { |
8260 | tree id; | |
8261 | ||
8262 | id = TREE_VALUE (args); | |
8263 | if (TREE_CODE (id) != STRING_CST) | |
8264 | { | |
85c0a25c | 8265 | error ("attribute %qE argument not a string", name); |
f8e93a2e | 8266 | *no_add_attrs = true; |
8267 | return NULL_TREE; | |
8268 | } | |
8269 | id = get_identifier (TREE_STRING_POINTER (id)); | |
8270 | /* This counts as a use of the object pointed to. */ | |
8271 | TREE_USED (id) = 1; | |
8272 | ||
8273 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
8274 | DECL_INITIAL (decl) = error_mark_node; | |
8275 | else | |
f2526cce | 8276 | TREE_STATIC (decl) = 1; |
85c0a25c | 8277 | |
8278 | if (!is_alias) | |
8279 | /* ifuncs are also aliases, so set that attribute too. */ | |
8280 | DECL_ATTRIBUTES (decl) | |
8281 | = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl)); | |
f8e93a2e | 8282 | } |
8283 | else | |
8284 | { | |
9b2d6d13 | 8285 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8286 | *no_add_attrs = true; |
8287 | } | |
8288 | ||
8e857c41 | 8289 | if (decl_in_symtab_p (*node)) |
8290 | { | |
8291 | struct symtab_node *n = symtab_node::get (decl); | |
8292 | if (n && n->refuse_visibility_changes) | |
8293 | { | |
8294 | if (is_alias) | |
8295 | error ("%+D declared alias after being used", decl); | |
8296 | else | |
8297 | error ("%+D declared ifunc after being used", decl); | |
8298 | } | |
8299 | } | |
8300 | ||
8301 | ||
f8e93a2e | 8302 | return NULL_TREE; |
8303 | } | |
8304 | ||
85c0a25c | 8305 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
8306 | struct attribute_spec.handler. */ | |
8307 | ||
8308 | static tree | |
8309 | handle_ifunc_attribute (tree *node, tree name, tree args, | |
8310 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8311 | { | |
8312 | return handle_alias_ifunc_attribute (false, node, name, args, no_add_attrs); | |
8313 | } | |
8314 | ||
8315 | /* Handle an "alias" or "ifunc" attribute; arguments as in | |
8316 | struct attribute_spec.handler. */ | |
8317 | ||
8318 | static tree | |
8319 | handle_alias_attribute (tree *node, tree name, tree args, | |
8320 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8321 | { | |
8322 | return handle_alias_ifunc_attribute (true, node, name, args, no_add_attrs); | |
8323 | } | |
8324 | ||
f4a30bd7 | 8325 | /* Handle a "weakref" attribute; arguments as in struct |
8326 | attribute_spec.handler. */ | |
8327 | ||
8328 | static tree | |
8329 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
8330 | int flags, bool *no_add_attrs) | |
8331 | { | |
8332 | tree attr = NULL_TREE; | |
8333 | ||
83852912 | 8334 | /* We must ignore the attribute when it is associated with |
8335 | local-scoped decls, since attribute alias is ignored and many | |
8336 | such symbols do not even have a DECL_WEAK field. */ | |
64a7bd81 | 8337 | if (decl_function_context (*node) |
8338 | || current_function_decl | |
b443c459 | 8339 | || !VAR_OR_FUNCTION_DECL_P (*node)) |
83852912 | 8340 | { |
8341 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8342 | *no_add_attrs = true; | |
8343 | return NULL_TREE; | |
8344 | } | |
8345 | ||
85c0a25c | 8346 | if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
8347 | { | |
8348 | error ("indirect function %q+D cannot be declared weakref", *node); | |
8349 | *no_add_attrs = true; | |
8350 | return NULL_TREE; | |
8351 | } | |
8352 | ||
f4a30bd7 | 8353 | /* The idea here is that `weakref("name")' mutates into `weakref, |
8354 | alias("name")', and weakref without arguments, in turn, | |
8355 | implicitly adds weak. */ | |
8356 | ||
8357 | if (args) | |
8358 | { | |
8359 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
8360 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
8361 | ||
8362 | *no_add_attrs = true; | |
0a3ecdc1 | 8363 | |
8364 | decl_attributes (node, attr, flags); | |
f4a30bd7 | 8365 | } |
8366 | else | |
8367 | { | |
8368 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
712d2297 | 8369 | error_at (DECL_SOURCE_LOCATION (*node), |
8370 | "weakref attribute must appear before alias attribute"); | |
f4a30bd7 | 8371 | |
0a3ecdc1 | 8372 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
8373 | and that isn't supported; and because it wants to add it to | |
8374 | the list of weak decls, which isn't helpful. */ | |
8375 | DECL_WEAK (*node) = 1; | |
f4a30bd7 | 8376 | } |
8377 | ||
8e857c41 | 8378 | if (decl_in_symtab_p (*node)) |
8379 | { | |
8380 | struct symtab_node *n = symtab_node::get (*node); | |
8381 | if (n && n->refuse_visibility_changes) | |
8382 | error ("%+D declared weakref after being used", *node); | |
8383 | } | |
8384 | ||
f4a30bd7 | 8385 | return NULL_TREE; |
8386 | } | |
8387 | ||
f8e93a2e | 8388 | /* Handle an "visibility" attribute; arguments as in |
8389 | struct attribute_spec.handler. */ | |
8390 | ||
8391 | static tree | |
1cae46be | 8392 | handle_visibility_attribute (tree *node, tree name, tree args, |
9a03a746 | 8393 | int ARG_UNUSED (flags), |
4a2849cb | 8394 | bool *ARG_UNUSED (no_add_attrs)) |
f8e93a2e | 8395 | { |
8396 | tree decl = *node; | |
9c40570a | 8397 | tree id = TREE_VALUE (args); |
4a2849cb | 8398 | enum symbol_visibility vis; |
f8e93a2e | 8399 | |
b212f378 | 8400 | if (TYPE_P (*node)) |
8401 | { | |
4a2849cb | 8402 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
8403 | /* OK */; | |
8404 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
8405 | { | |
8406 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
8407 | name); | |
8408 | return NULL_TREE; | |
8409 | } | |
8410 | else if (TYPE_FIELDS (*node)) | |
8411 | { | |
8412 | error ("%qE attribute ignored because %qT is already defined", | |
8413 | name, *node); | |
8414 | return NULL_TREE; | |
8415 | } | |
b212f378 | 8416 | } |
84166705 | 8417 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
f8e93a2e | 8418 | { |
9b2d6d13 | 8419 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
9c40570a | 8420 | return NULL_TREE; |
f8e93a2e | 8421 | } |
f8e93a2e | 8422 | |
9c40570a | 8423 | if (TREE_CODE (id) != STRING_CST) |
8424 | { | |
07e3a3d2 | 8425 | error ("visibility argument not a string"); |
9c40570a | 8426 | return NULL_TREE; |
f8e93a2e | 8427 | } |
b27ac6b5 | 8428 | |
b212f378 | 8429 | /* If this is a type, set the visibility on the type decl. */ |
8430 | if (TYPE_P (decl)) | |
8431 | { | |
8432 | decl = TYPE_NAME (decl); | |
84166705 | 8433 | if (!decl) |
a0c938f0 | 8434 | return NULL_TREE; |
e147aab3 | 8435 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
8436 | { | |
9b2d6d13 | 8437 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e147aab3 | 8438 | name); |
8439 | return NULL_TREE; | |
8440 | } | |
b212f378 | 8441 | } |
f8e93a2e | 8442 | |
9c40570a | 8443 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
4a2849cb | 8444 | vis = VISIBILITY_DEFAULT; |
9c40570a | 8445 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
4a2849cb | 8446 | vis = VISIBILITY_INTERNAL; |
9c40570a | 8447 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
4a2849cb | 8448 | vis = VISIBILITY_HIDDEN; |
9c40570a | 8449 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
4a2849cb | 8450 | vis = VISIBILITY_PROTECTED; |
9c40570a | 8451 | else |
4a2849cb | 8452 | { |
8453 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
8454 | vis = VISIBILITY_DEFAULT; | |
8455 | } | |
8456 | ||
8457 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
098a01e7 | 8458 | && vis != DECL_VISIBILITY (decl)) |
8459 | { | |
8460 | tree attributes = (TYPE_P (*node) | |
8461 | ? TYPE_ATTRIBUTES (*node) | |
8462 | : DECL_ATTRIBUTES (decl)); | |
8463 | if (lookup_attribute ("visibility", attributes)) | |
8464 | error ("%qD redeclared with different visibility", decl); | |
8465 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8466 | && lookup_attribute ("dllimport", attributes)) | |
8467 | error ("%qD was declared %qs which implies default visibility", | |
8468 | decl, "dllimport"); | |
8469 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8470 | && lookup_attribute ("dllexport", attributes)) | |
8471 | error ("%qD was declared %qs which implies default visibility", | |
8472 | decl, "dllexport"); | |
8473 | } | |
4a2849cb | 8474 | |
8475 | DECL_VISIBILITY (decl) = vis; | |
b212f378 | 8476 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
8477 | ||
4a2849cb | 8478 | /* Go ahead and attach the attribute to the node as well. This is needed |
8479 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
8480 | visibility was not specified, or because it was explicitly overridden | |
8481 | from the containing scope. */ | |
9c40570a | 8482 | |
f8e93a2e | 8483 | return NULL_TREE; |
8484 | } | |
8485 | ||
3aa0c315 | 8486 | /* Determine the ELF symbol visibility for DECL, which is either a |
8487 | variable or a function. It is an error to use this function if a | |
8488 | definition of DECL is not available in this translation unit. | |
8489 | Returns true if the final visibility has been determined by this | |
8490 | function; false if the caller is free to make additional | |
8491 | modifications. */ | |
8492 | ||
8493 | bool | |
8494 | c_determine_visibility (tree decl) | |
8495 | { | |
b443c459 | 8496 | gcc_assert (VAR_OR_FUNCTION_DECL_P (decl)); |
3aa0c315 | 8497 | |
8498 | /* If the user explicitly specified the visibility with an | |
8499 | attribute, honor that. DECL_VISIBILITY will have been set during | |
920f5a70 | 8500 | the processing of the attribute. We check for an explicit |
8501 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
8502 | to distinguish the use of an attribute from the use of a "#pragma | |
8503 | GCC visibility push(...)"; in the latter case we still want other | |
8504 | considerations to be able to overrule the #pragma. */ | |
8505 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) | |
8506 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
8507 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
8508 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
3aa0c315 | 8509 | return true; |
8510 | ||
4a2849cb | 8511 | /* Set default visibility to whatever the user supplied with |
8512 | visibility_specified depending on #pragma GCC visibility. */ | |
8513 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
8514 | { | |
2d9d8740 | 8515 | if (visibility_options.inpragma |
8516 | || DECL_VISIBILITY (decl) != default_visibility) | |
8517 | { | |
8518 | DECL_VISIBILITY (decl) = default_visibility; | |
8519 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
8520 | /* If visibility changed and DECL already has DECL_RTL, ensure | |
8521 | symbol flags are updated. */ | |
8522 | if (((TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) | |
8523 | || TREE_CODE (decl) == FUNCTION_DECL) | |
8524 | && DECL_RTL_SET_P (decl)) | |
8525 | make_decl_rtl (decl); | |
8526 | } | |
4a2849cb | 8527 | } |
3aa0c315 | 8528 | return false; |
8529 | } | |
8530 | ||
24dfead4 | 8531 | /* Handle an "tls_model" attribute; arguments as in |
8532 | struct attribute_spec.handler. */ | |
8533 | ||
8534 | static tree | |
1cae46be | 8535 | handle_tls_model_attribute (tree *node, tree name, tree args, |
9a03a746 | 8536 | int ARG_UNUSED (flags), bool *no_add_attrs) |
24dfead4 | 8537 | { |
1b53eb20 | 8538 | tree id; |
24dfead4 | 8539 | tree decl = *node; |
1b53eb20 | 8540 | enum tls_model kind; |
24dfead4 | 8541 | |
1b53eb20 | 8542 | *no_add_attrs = true; |
8543 | ||
c34f8a78 | 8544 | if (TREE_CODE (decl) != VAR_DECL || !DECL_THREAD_LOCAL_P (decl)) |
24dfead4 | 8545 | { |
9b2d6d13 | 8546 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
1b53eb20 | 8547 | return NULL_TREE; |
24dfead4 | 8548 | } |
24dfead4 | 8549 | |
1b53eb20 | 8550 | kind = DECL_TLS_MODEL (decl); |
8551 | id = TREE_VALUE (args); | |
8552 | if (TREE_CODE (id) != STRING_CST) | |
8553 | { | |
8554 | error ("tls_model argument not a string"); | |
8555 | return NULL_TREE; | |
24dfead4 | 8556 | } |
8557 | ||
1b53eb20 | 8558 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
8559 | kind = TLS_MODEL_LOCAL_EXEC; | |
8560 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
8561 | kind = TLS_MODEL_INITIAL_EXEC; | |
8562 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
8563 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
8564 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
8565 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
8566 | else | |
8567 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
8568 | ||
5e68df57 | 8569 | set_decl_tls_model (decl, kind); |
24dfead4 | 8570 | return NULL_TREE; |
8571 | } | |
8572 | ||
f8e93a2e | 8573 | /* Handle a "no_instrument_function" attribute; arguments as in |
8574 | struct attribute_spec.handler. */ | |
8575 | ||
8576 | static tree | |
1cae46be | 8577 | handle_no_instrument_function_attribute (tree *node, tree name, |
9a03a746 | 8578 | tree ARG_UNUSED (args), |
8579 | int ARG_UNUSED (flags), | |
09347743 | 8580 | bool *no_add_attrs) |
f8e93a2e | 8581 | { |
8582 | tree decl = *node; | |
8583 | ||
8584 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8585 | { | |
712d2297 | 8586 | error_at (DECL_SOURCE_LOCATION (decl), |
8587 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 8588 | *no_add_attrs = true; |
8589 | } | |
f8e93a2e | 8590 | else |
8591 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
8592 | ||
8593 | return NULL_TREE; | |
8594 | } | |
8595 | ||
8596 | /* Handle a "malloc" attribute; arguments as in | |
8597 | struct attribute_spec.handler. */ | |
8598 | ||
8599 | static tree | |
9a03a746 | 8600 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8601 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 8602 | { |
a5147fca | 8603 | if (TREE_CODE (*node) == FUNCTION_DECL |
8604 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
f8e93a2e | 8605 | DECL_IS_MALLOC (*node) = 1; |
f8e93a2e | 8606 | else |
8607 | { | |
9b2d6d13 | 8608 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8609 | *no_add_attrs = true; |
8610 | } | |
8611 | ||
8612 | return NULL_TREE; | |
8613 | } | |
8614 | ||
4a29c97c | 8615 | /* Handle a "alloc_size" attribute; arguments as in |
8616 | struct attribute_spec.handler. */ | |
8617 | ||
8618 | static tree | |
8619 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
8620 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8621 | { | |
2802826e | 8622 | unsigned arg_count = type_num_arguments (*node); |
4a29c97c | 8623 | for (; args; args = TREE_CHAIN (args)) |
8624 | { | |
8625 | tree position = TREE_VALUE (args); | |
caf62483 | 8626 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
8627 | && TREE_CODE (position) != FUNCTION_DECL) | |
8628 | position = default_conversion (position); | |
4a29c97c | 8629 | |
237e78b1 | 8630 | if (!tree_fits_uhwi_p (position) |
8631 | || !arg_count | |
8632 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
4a29c97c | 8633 | { |
48e1416a | 8634 | warning (OPT_Wattributes, |
4a29c97c | 8635 | "alloc_size parameter outside range"); |
8636 | *no_add_attrs = true; | |
8637 | return NULL_TREE; | |
8638 | } | |
8639 | } | |
8640 | return NULL_TREE; | |
8641 | } | |
8642 | ||
237e78b1 | 8643 | /* Handle a "alloc_align" attribute; arguments as in |
8644 | struct attribute_spec.handler. */ | |
8645 | ||
8646 | static tree | |
8647 | handle_alloc_align_attribute (tree *node, tree, tree args, int, | |
8648 | bool *no_add_attrs) | |
8649 | { | |
8650 | unsigned arg_count = type_num_arguments (*node); | |
8651 | tree position = TREE_VALUE (args); | |
8652 | if (position && TREE_CODE (position) != IDENTIFIER_NODE) | |
8653 | position = default_conversion (position); | |
8654 | ||
8655 | if (!tree_fits_uhwi_p (position) | |
8656 | || !arg_count | |
8657 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
8658 | { | |
8659 | warning (OPT_Wattributes, | |
8660 | "alloc_align parameter outside range"); | |
8661 | *no_add_attrs = true; | |
8662 | return NULL_TREE; | |
8663 | } | |
8664 | return NULL_TREE; | |
8665 | } | |
8666 | ||
8667 | /* Handle a "assume_aligned" attribute; arguments as in | |
8668 | struct attribute_spec.handler. */ | |
8669 | ||
8670 | static tree | |
8671 | handle_assume_aligned_attribute (tree *, tree, tree args, int, | |
8672 | bool *no_add_attrs) | |
8673 | { | |
8674 | for (; args; args = TREE_CHAIN (args)) | |
8675 | { | |
8676 | tree position = TREE_VALUE (args); | |
8677 | if (position && TREE_CODE (position) != IDENTIFIER_NODE | |
8678 | && TREE_CODE (position) != FUNCTION_DECL) | |
8679 | position = default_conversion (position); | |
8680 | ||
8681 | if (TREE_CODE (position) != INTEGER_CST) | |
8682 | { | |
8683 | warning (OPT_Wattributes, | |
8684 | "assume_aligned parameter not integer constant"); | |
8685 | *no_add_attrs = true; | |
8686 | return NULL_TREE; | |
8687 | } | |
8688 | } | |
8689 | return NULL_TREE; | |
8690 | } | |
8691 | ||
8ce86007 | 8692 | /* Handle a "fn spec" attribute; arguments as in |
8693 | struct attribute_spec.handler. */ | |
8694 | ||
8695 | static tree | |
8696 | handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), | |
8697 | tree args, int ARG_UNUSED (flags), | |
8698 | bool *no_add_attrs ATTRIBUTE_UNUSED) | |
8699 | { | |
8700 | gcc_assert (args | |
8701 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST | |
8702 | && !TREE_CHAIN (args)); | |
8703 | return NULL_TREE; | |
8704 | } | |
8705 | ||
058a1b7a | 8706 | /* Handle a "bnd_variable_size" attribute; arguments as in |
8707 | struct attribute_spec.handler. */ | |
8708 | ||
8709 | static tree | |
8710 | handle_bnd_variable_size_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
8711 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8712 | { | |
8713 | if (TREE_CODE (*node) != FIELD_DECL) | |
8714 | { | |
8715 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8716 | *no_add_attrs = true; | |
8717 | } | |
8718 | ||
8719 | return NULL_TREE; | |
8720 | } | |
8721 | ||
8722 | /* Handle a "bnd_legacy" attribute; arguments as in | |
8723 | struct attribute_spec.handler. */ | |
8724 | ||
8725 | static tree | |
8726 | handle_bnd_legacy (tree *node, tree name, tree ARG_UNUSED (args), | |
8727 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8728 | { | |
8729 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8730 | { | |
8731 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8732 | *no_add_attrs = true; | |
8733 | } | |
8734 | ||
8735 | return NULL_TREE; | |
8736 | } | |
8737 | ||
8738 | /* Handle a "bnd_instrument" attribute; arguments as in | |
8739 | struct attribute_spec.handler. */ | |
8740 | ||
8741 | static tree | |
8742 | handle_bnd_instrument (tree *node, tree name, tree ARG_UNUSED (args), | |
8743 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8744 | { | |
8745 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
8746 | { | |
8747 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8748 | *no_add_attrs = true; | |
8749 | } | |
8750 | ||
8751 | return NULL_TREE; | |
8752 | } | |
8753 | ||
a96c3cc1 | 8754 | /* Handle a "warn_unused" attribute; arguments as in |
8755 | struct attribute_spec.handler. */ | |
8756 | ||
8757 | static tree | |
8758 | handle_warn_unused_attribute (tree *node, tree name, | |
8759 | tree args ATTRIBUTE_UNUSED, | |
8760 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
8761 | { | |
8762 | if (TYPE_P (*node)) | |
8763 | /* Do nothing else, just set the attribute. We'll get at | |
8764 | it later with lookup_attribute. */ | |
8765 | ; | |
8766 | else | |
8767 | { | |
8768 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8769 | *no_add_attrs = true; | |
8770 | } | |
8771 | ||
8772 | return NULL_TREE; | |
8773 | } | |
8774 | ||
bc7bff74 | 8775 | /* Handle an "omp declare simd" attribute; arguments as in |
8776 | struct attribute_spec.handler. */ | |
8777 | ||
8778 | static tree | |
8779 | handle_omp_declare_simd_attribute (tree *, tree, tree, int, bool *) | |
8780 | { | |
8781 | return NULL_TREE; | |
8782 | } | |
8783 | ||
8784 | /* Handle an "omp declare target" attribute; arguments as in | |
8785 | struct attribute_spec.handler. */ | |
8786 | ||
8787 | static tree | |
8788 | handle_omp_declare_target_attribute (tree *, tree, tree, int, bool *) | |
8789 | { | |
8790 | return NULL_TREE; | |
8791 | } | |
8792 | ||
26d1c5ff | 8793 | /* Handle a "returns_twice" attribute; arguments as in |
8794 | struct attribute_spec.handler. */ | |
8795 | ||
8796 | static tree | |
8797 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
8798 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8799 | { | |
8800 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
8801 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
8802 | else | |
8803 | { | |
9b2d6d13 | 8804 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
26d1c5ff | 8805 | *no_add_attrs = true; |
8806 | } | |
8807 | ||
8808 | return NULL_TREE; | |
8809 | } | |
8810 | ||
f8e93a2e | 8811 | /* Handle a "no_limit_stack" attribute; arguments as in |
8812 | struct attribute_spec.handler. */ | |
8813 | ||
8814 | static tree | |
1cae46be | 8815 | handle_no_limit_stack_attribute (tree *node, tree name, |
9a03a746 | 8816 | tree ARG_UNUSED (args), |
8817 | int ARG_UNUSED (flags), | |
09347743 | 8818 | bool *no_add_attrs) |
f8e93a2e | 8819 | { |
8820 | tree decl = *node; | |
8821 | ||
8822 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8823 | { | |
712d2297 | 8824 | error_at (DECL_SOURCE_LOCATION (decl), |
8825 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 8826 | *no_add_attrs = true; |
8827 | } | |
8828 | else if (DECL_INITIAL (decl)) | |
8829 | { | |
712d2297 | 8830 | error_at (DECL_SOURCE_LOCATION (decl), |
8831 | "can%'t set %qE attribute after definition", name); | |
f8e93a2e | 8832 | *no_add_attrs = true; |
8833 | } | |
8834 | else | |
8835 | DECL_NO_LIMIT_STACK (decl) = 1; | |
8836 | ||
8837 | return NULL_TREE; | |
8838 | } | |
8839 | ||
8840 | /* Handle a "pure" attribute; arguments as in | |
8841 | struct attribute_spec.handler. */ | |
8842 | ||
8843 | static tree | |
9a03a746 | 8844 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8845 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 8846 | { |
8847 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
9c2a0c05 | 8848 | DECL_PURE_P (*node) = 1; |
f8e93a2e | 8849 | /* ??? TODO: Support types. */ |
8850 | else | |
8851 | { | |
9b2d6d13 | 8852 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8853 | *no_add_attrs = true; |
8854 | } | |
8855 | ||
8856 | return NULL_TREE; | |
8857 | } | |
8858 | ||
4c0315d0 | 8859 | /* Digest an attribute list destined for a transactional memory statement. |
8860 | ALLOWED is the set of attributes that are allowed for this statement; | |
8861 | return the attribute we parsed. Multiple attributes are never allowed. */ | |
8862 | ||
8863 | int | |
8864 | parse_tm_stmt_attr (tree attrs, int allowed) | |
8865 | { | |
8866 | tree a_seen = NULL; | |
8867 | int m_seen = 0; | |
8868 | ||
8869 | for ( ; attrs ; attrs = TREE_CHAIN (attrs)) | |
8870 | { | |
8871 | tree a = TREE_PURPOSE (attrs); | |
8872 | int m = 0; | |
8873 | ||
8874 | if (is_attribute_p ("outer", a)) | |
8875 | m = TM_STMT_ATTR_OUTER; | |
8876 | ||
8877 | if ((m & allowed) == 0) | |
8878 | { | |
8879 | warning (OPT_Wattributes, "%qE attribute directive ignored", a); | |
8880 | continue; | |
8881 | } | |
8882 | ||
8883 | if (m_seen == 0) | |
8884 | { | |
8885 | a_seen = a; | |
8886 | m_seen = m; | |
8887 | } | |
8888 | else if (m_seen == m) | |
8889 | warning (OPT_Wattributes, "%qE attribute duplicated", a); | |
8890 | else | |
8891 | warning (OPT_Wattributes, "%qE attribute follows %qE", a, a_seen); | |
8892 | } | |
8893 | ||
8894 | return m_seen; | |
8895 | } | |
8896 | ||
8897 | /* Transform a TM attribute name into a maskable integer and back. | |
8898 | Note that NULL (i.e. no attribute) is mapped to UNKNOWN, corresponding | |
8899 | to how the lack of an attribute is treated. */ | |
8900 | ||
8901 | int | |
8902 | tm_attr_to_mask (tree attr) | |
8903 | { | |
8904 | if (attr == NULL) | |
8905 | return 0; | |
8906 | if (is_attribute_p ("transaction_safe", attr)) | |
8907 | return TM_ATTR_SAFE; | |
8908 | if (is_attribute_p ("transaction_callable", attr)) | |
8909 | return TM_ATTR_CALLABLE; | |
8910 | if (is_attribute_p ("transaction_pure", attr)) | |
8911 | return TM_ATTR_PURE; | |
8912 | if (is_attribute_p ("transaction_unsafe", attr)) | |
8913 | return TM_ATTR_IRREVOCABLE; | |
8914 | if (is_attribute_p ("transaction_may_cancel_outer", attr)) | |
8915 | return TM_ATTR_MAY_CANCEL_OUTER; | |
8916 | return 0; | |
8917 | } | |
8918 | ||
8919 | tree | |
8920 | tm_mask_to_attr (int mask) | |
8921 | { | |
8922 | const char *str; | |
8923 | switch (mask) | |
8924 | { | |
8925 | case TM_ATTR_SAFE: | |
8926 | str = "transaction_safe"; | |
8927 | break; | |
8928 | case TM_ATTR_CALLABLE: | |
8929 | str = "transaction_callable"; | |
8930 | break; | |
8931 | case TM_ATTR_PURE: | |
8932 | str = "transaction_pure"; | |
8933 | break; | |
8934 | case TM_ATTR_IRREVOCABLE: | |
8935 | str = "transaction_unsafe"; | |
8936 | break; | |
8937 | case TM_ATTR_MAY_CANCEL_OUTER: | |
8938 | str = "transaction_may_cancel_outer"; | |
8939 | break; | |
8940 | default: | |
8941 | gcc_unreachable (); | |
8942 | } | |
8943 | return get_identifier (str); | |
8944 | } | |
8945 | ||
8946 | /* Return the first TM attribute seen in LIST. */ | |
8947 | ||
8948 | tree | |
8949 | find_tm_attribute (tree list) | |
8950 | { | |
8951 | for (; list ; list = TREE_CHAIN (list)) | |
8952 | { | |
8953 | tree name = TREE_PURPOSE (list); | |
8954 | if (tm_attr_to_mask (name) != 0) | |
8955 | return name; | |
8956 | } | |
8957 | return NULL_TREE; | |
8958 | } | |
8959 | ||
8960 | /* Handle the TM attributes; arguments as in struct attribute_spec.handler. | |
8961 | Here we accept only function types, and verify that none of the other | |
8962 | function TM attributes are also applied. */ | |
8963 | /* ??? We need to accept class types for C++, but not C. This greatly | |
8964 | complicates this function, since we can no longer rely on the extra | |
8965 | processing given by function_type_required. */ | |
8966 | ||
8967 | static tree | |
8968 | handle_tm_attribute (tree *node, tree name, tree args, | |
8969 | int flags, bool *no_add_attrs) | |
8970 | { | |
8971 | /* Only one path adds the attribute; others don't. */ | |
8972 | *no_add_attrs = true; | |
8973 | ||
8974 | switch (TREE_CODE (*node)) | |
8975 | { | |
8976 | case RECORD_TYPE: | |
8977 | case UNION_TYPE: | |
8978 | /* Only tm_callable and tm_safe apply to classes. */ | |
8979 | if (tm_attr_to_mask (name) & ~(TM_ATTR_SAFE | TM_ATTR_CALLABLE)) | |
8980 | goto ignored; | |
8981 | /* FALLTHRU */ | |
8982 | ||
8983 | case FUNCTION_TYPE: | |
8984 | case METHOD_TYPE: | |
8985 | { | |
8986 | tree old_name = find_tm_attribute (TYPE_ATTRIBUTES (*node)); | |
8987 | if (old_name == name) | |
8988 | ; | |
8989 | else if (old_name != NULL_TREE) | |
8990 | error ("type was previously declared %qE", old_name); | |
8991 | else | |
8992 | *no_add_attrs = false; | |
8993 | } | |
8994 | break; | |
8995 | ||
8996 | case POINTER_TYPE: | |
8997 | { | |
8998 | enum tree_code subcode = TREE_CODE (TREE_TYPE (*node)); | |
8999 | if (subcode == FUNCTION_TYPE || subcode == METHOD_TYPE) | |
9000 | { | |
9001 | tree fn_tmp = TREE_TYPE (*node); | |
9002 | decl_attributes (&fn_tmp, tree_cons (name, args, NULL), 0); | |
9003 | *node = build_pointer_type (fn_tmp); | |
9004 | break; | |
9005 | } | |
9006 | } | |
9007 | /* FALLTHRU */ | |
9008 | ||
9009 | default: | |
9010 | /* If a function is next, pass it on to be tried next. */ | |
9011 | if (flags & (int) ATTR_FLAG_FUNCTION_NEXT) | |
9012 | return tree_cons (name, args, NULL); | |
9013 | ||
9014 | ignored: | |
9015 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9016 | break; | |
9017 | } | |
9018 | ||
9019 | return NULL_TREE; | |
9020 | } | |
9021 | ||
9022 | /* Handle the TM_WRAP attribute; arguments as in | |
9023 | struct attribute_spec.handler. */ | |
9024 | ||
9025 | static tree | |
9026 | handle_tm_wrap_attribute (tree *node, tree name, tree args, | |
9027 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
9028 | { | |
9029 | tree decl = *node; | |
9030 | ||
9031 | /* We don't need the attribute even on success, since we | |
9032 | record the entry in an external table. */ | |
9033 | *no_add_attrs = true; | |
9034 | ||
9035 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
9036 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9037 | else | |
9038 | { | |
9039 | tree wrap_decl = TREE_VALUE (args); | |
3e5a8b00 | 9040 | if (error_operand_p (wrap_decl)) |
9041 | ; | |
9042 | else if (TREE_CODE (wrap_decl) != IDENTIFIER_NODE | |
b443c459 | 9043 | && !VAR_OR_FUNCTION_DECL_P (wrap_decl)) |
4c0315d0 | 9044 | error ("%qE argument not an identifier", name); |
9045 | else | |
9046 | { | |
9047 | if (TREE_CODE (wrap_decl) == IDENTIFIER_NODE) | |
9048 | wrap_decl = lookup_name (wrap_decl); | |
9049 | if (wrap_decl && TREE_CODE (wrap_decl) == FUNCTION_DECL) | |
9050 | { | |
9051 | if (lang_hooks.types_compatible_p (TREE_TYPE (decl), | |
9052 | TREE_TYPE (wrap_decl))) | |
9053 | record_tm_replacement (wrap_decl, decl); | |
9054 | else | |
9055 | error ("%qD is not compatible with %qD", wrap_decl, decl); | |
9056 | } | |
9057 | else | |
cdf34fca | 9058 | error ("%qE argument is not a function", name); |
4c0315d0 | 9059 | } |
9060 | } | |
9061 | ||
9062 | return NULL_TREE; | |
9063 | } | |
9064 | ||
9065 | /* Ignore the given attribute. Used when this attribute may be usefully | |
9066 | overridden by the target, but is not used generically. */ | |
9067 | ||
9068 | static tree | |
9069 | ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name), | |
9070 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9071 | bool *no_add_attrs) | |
9072 | { | |
9073 | *no_add_attrs = true; | |
9074 | return NULL_TREE; | |
9075 | } | |
9076 | ||
fc09b200 | 9077 | /* Handle a "no vops" attribute; arguments as in |
9078 | struct attribute_spec.handler. */ | |
9079 | ||
9080 | static tree | |
9081 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
9082 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9083 | bool *ARG_UNUSED (no_add_attrs)) | |
9084 | { | |
9085 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
9086 | DECL_IS_NOVOPS (*node) = 1; | |
9087 | return NULL_TREE; | |
9088 | } | |
9089 | ||
f8e93a2e | 9090 | /* Handle a "deprecated" attribute; arguments as in |
9091 | struct attribute_spec.handler. */ | |
1cae46be | 9092 | |
f8e93a2e | 9093 | static tree |
1cae46be | 9094 | handle_deprecated_attribute (tree *node, tree name, |
45c4e798 | 9095 | tree args, int flags, |
09347743 | 9096 | bool *no_add_attrs) |
f8e93a2e | 9097 | { |
9098 | tree type = NULL_TREE; | |
9099 | int warn = 0; | |
782858b8 | 9100 | tree what = NULL_TREE; |
1cae46be | 9101 | |
45c4e798 | 9102 | if (!args) |
9103 | *no_add_attrs = true; | |
9104 | else if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
9105 | { | |
9106 | error ("deprecated message is not a string"); | |
9107 | *no_add_attrs = true; | |
9108 | } | |
9109 | ||
f8e93a2e | 9110 | if (DECL_P (*node)) |
9111 | { | |
9112 | tree decl = *node; | |
9113 | type = TREE_TYPE (decl); | |
1cae46be | 9114 | |
f8e93a2e | 9115 | if (TREE_CODE (decl) == TYPE_DECL |
9116 | || TREE_CODE (decl) == PARM_DECL | |
b443c459 | 9117 | || VAR_OR_FUNCTION_DECL_P (decl) |
40c8d1dd | 9118 | || TREE_CODE (decl) == FIELD_DECL |
5a4c69dd | 9119 | || TREE_CODE (decl) == CONST_DECL |
40c8d1dd | 9120 | || objc_method_decl (TREE_CODE (decl))) |
f8e93a2e | 9121 | TREE_DEPRECATED (decl) = 1; |
9122 | else | |
9123 | warn = 1; | |
9124 | } | |
9125 | else if (TYPE_P (*node)) | |
9126 | { | |
9127 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 9128 | *node = build_variant_type_copy (*node); |
f8e93a2e | 9129 | TREE_DEPRECATED (*node) = 1; |
9130 | type = *node; | |
9131 | } | |
9132 | else | |
9133 | warn = 1; | |
1cae46be | 9134 | |
f8e93a2e | 9135 | if (warn) |
9136 | { | |
9137 | *no_add_attrs = true; | |
9138 | if (type && TYPE_NAME (type)) | |
9139 | { | |
9140 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
782858b8 | 9141 | what = TYPE_NAME (*node); |
f8e93a2e | 9142 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
9143 | && DECL_NAME (TYPE_NAME (type))) | |
782858b8 | 9144 | what = DECL_NAME (TYPE_NAME (type)); |
f8e93a2e | 9145 | } |
9146 | if (what) | |
9b2d6d13 | 9147 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
f8e93a2e | 9148 | else |
9b2d6d13 | 9149 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 9150 | } |
9151 | ||
9152 | return NULL_TREE; | |
9153 | } | |
9154 | ||
f8e93a2e | 9155 | /* Handle a "vector_size" attribute; arguments as in |
9156 | struct attribute_spec.handler. */ | |
9157 | ||
9158 | static tree | |
1cae46be | 9159 | handle_vector_size_attribute (tree *node, tree name, tree args, |
9a03a746 | 9160 | int ARG_UNUSED (flags), |
09347743 | 9161 | bool *no_add_attrs) |
f8e93a2e | 9162 | { |
9163 | unsigned HOST_WIDE_INT vecsize, nunits; | |
3754d046 | 9164 | machine_mode orig_mode; |
4917c376 | 9165 | tree type = *node, new_type, size; |
f8e93a2e | 9166 | |
9167 | *no_add_attrs = true; | |
9168 | ||
4917c376 | 9169 | size = TREE_VALUE (args); |
3e5a8b00 | 9170 | if (size && TREE_CODE (size) != IDENTIFIER_NODE |
9171 | && TREE_CODE (size) != FUNCTION_DECL) | |
caf62483 | 9172 | size = default_conversion (size); |
4917c376 | 9173 | |
e913b5cd | 9174 | if (!tree_fits_uhwi_p (size)) |
f8e93a2e | 9175 | { |
9b2d6d13 | 9176 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 9177 | return NULL_TREE; |
9178 | } | |
9179 | ||
9180 | /* Get the vector size (in bytes). */ | |
e913b5cd | 9181 | vecsize = tree_to_uhwi (size); |
f8e93a2e | 9182 | |
9183 | /* We need to provide for vector pointers, vector arrays, and | |
9184 | functions returning vectors. For example: | |
9185 | ||
9186 | __attribute__((vector_size(16))) short *foo; | |
9187 | ||
9188 | In this case, the mode is SI, but the type being modified is | |
9189 | HI, so we need to look further. */ | |
9190 | ||
9191 | while (POINTER_TYPE_P (type) | |
9192 | || TREE_CODE (type) == FUNCTION_TYPE | |
5bfb0742 | 9193 | || TREE_CODE (type) == METHOD_TYPE |
2cb0e5d9 | 9194 | || TREE_CODE (type) == ARRAY_TYPE |
9195 | || TREE_CODE (type) == OFFSET_TYPE) | |
f8e93a2e | 9196 | type = TREE_TYPE (type); |
9197 | ||
9198 | /* Get the mode of the type being modified. */ | |
9199 | orig_mode = TYPE_MODE (type); | |
9200 | ||
2cb0e5d9 | 9201 | if ((!INTEGRAL_TYPE_P (type) |
9202 | && !SCALAR_FLOAT_TYPE_P (type) | |
9203 | && !FIXED_POINT_TYPE_P (type)) | |
cee7491d | 9204 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
9421ebb9 | 9205 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
9206 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
e913b5cd | 9207 | || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type)) |
7ec31215 | 9208 | || TREE_CODE (type) == BOOLEAN_TYPE) |
f8e93a2e | 9209 | { |
782858b8 | 9210 | error ("invalid vector type for attribute %qE", name); |
f8e93a2e | 9211 | return NULL_TREE; |
9212 | } | |
9213 | ||
e913b5cd | 9214 | if (vecsize % tree_to_uhwi (TYPE_SIZE_UNIT (type))) |
39cc3e6d | 9215 | { |
9216 | error ("vector size not an integral multiple of component size"); | |
9217 | return NULL; | |
9218 | } | |
9219 | ||
9220 | if (vecsize == 0) | |
9221 | { | |
9222 | error ("zero vector size"); | |
9223 | return NULL; | |
9224 | } | |
9225 | ||
f8e93a2e | 9226 | /* Calculate how many units fit in the vector. */ |
e913b5cd | 9227 | nunits = vecsize / tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
83e2a11b | 9228 | if (nunits & (nunits - 1)) |
f8e93a2e | 9229 | { |
83e2a11b | 9230 | error ("number of components of the vector not a power of two"); |
f8e93a2e | 9231 | return NULL_TREE; |
9232 | } | |
9233 | ||
83e2a11b | 9234 | new_type = build_vector_type (type, nunits); |
f8e93a2e | 9235 | |
9236 | /* Build back pointers if needed. */ | |
d991e6e8 | 9237 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
f8e93a2e | 9238 | |
9239 | return NULL_TREE; | |
9240 | } | |
9241 | ||
dbf6c367 | 9242 | /* Handle the "nonnull" attribute. */ |
9243 | static tree | |
9a03a746 | 9244 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
9245 | tree args, int ARG_UNUSED (flags), | |
09347743 | 9246 | bool *no_add_attrs) |
dbf6c367 | 9247 | { |
9248 | tree type = *node; | |
9249 | unsigned HOST_WIDE_INT attr_arg_num; | |
9250 | ||
9251 | /* If no arguments are specified, all pointer arguments should be | |
d716ce75 | 9252 | non-null. Verify a full prototype is given so that the arguments |
dbf6c367 | 9253 | will have the correct types when we actually check them later. */ |
84166705 | 9254 | if (!args) |
dbf6c367 | 9255 | { |
a36cf284 | 9256 | if (!prototype_p (type)) |
dbf6c367 | 9257 | { |
9258 | error ("nonnull attribute without arguments on a non-prototype"); | |
4ee9c684 | 9259 | *no_add_attrs = true; |
dbf6c367 | 9260 | } |
9261 | return NULL_TREE; | |
9262 | } | |
9263 | ||
9264 | /* Argument list specified. Verify that each argument number references | |
9265 | a pointer argument. */ | |
caf62483 | 9266 | for (attr_arg_num = 1; args; attr_arg_num++, args = TREE_CHAIN (args)) |
dbf6c367 | 9267 | { |
4ee9c684 | 9268 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
dbf6c367 | 9269 | |
caf62483 | 9270 | tree arg = TREE_VALUE (args); |
9271 | if (arg && TREE_CODE (arg) != IDENTIFIER_NODE | |
9272 | && TREE_CODE (arg) != FUNCTION_DECL) | |
9273 | arg = default_conversion (arg); | |
9274 | ||
9275 | if (!get_nonnull_operand (arg, &arg_num)) | |
dbf6c367 | 9276 | { |
07e3a3d2 | 9277 | error ("nonnull argument has invalid operand number (argument %lu)", |
dbf6c367 | 9278 | (unsigned long) attr_arg_num); |
9279 | *no_add_attrs = true; | |
9280 | return NULL_TREE; | |
9281 | } | |
9282 | ||
d0af78c5 | 9283 | if (prototype_p (type)) |
dbf6c367 | 9284 | { |
d0af78c5 | 9285 | function_args_iterator iter; |
9286 | tree argument; | |
9287 | ||
9288 | function_args_iter_init (&iter, type); | |
9289 | for (ck_num = 1; ; ck_num++, function_args_iter_next (&iter)) | |
dbf6c367 | 9290 | { |
d0af78c5 | 9291 | argument = function_args_iter_cond (&iter); |
9292 | if (argument == NULL_TREE || ck_num == arg_num) | |
dbf6c367 | 9293 | break; |
dbf6c367 | 9294 | } |
9295 | ||
84166705 | 9296 | if (!argument |
d0af78c5 | 9297 | || TREE_CODE (argument) == VOID_TYPE) |
dbf6c367 | 9298 | { |
07e3a3d2 | 9299 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
dbf6c367 | 9300 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
9301 | *no_add_attrs = true; | |
9302 | return NULL_TREE; | |
9303 | } | |
9304 | ||
d0af78c5 | 9305 | if (TREE_CODE (argument) != POINTER_TYPE) |
dbf6c367 | 9306 | { |
07e3a3d2 | 9307 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
dbf6c367 | 9308 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
9309 | *no_add_attrs = true; | |
9310 | return NULL_TREE; | |
9311 | } | |
9312 | } | |
9313 | } | |
9314 | ||
9315 | return NULL_TREE; | |
9316 | } | |
9317 | ||
9318 | /* Check the argument list of a function call for null in argument slots | |
d01f58f9 | 9319 | that are marked as requiring a non-null pointer argument. The NARGS |
9320 | arguments are passed in the array ARGARRAY. | |
9321 | */ | |
dbf6c367 | 9322 | |
9323 | static void | |
d01f58f9 | 9324 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
dbf6c367 | 9325 | { |
9ca77b08 | 9326 | tree a; |
d01f58f9 | 9327 | int i; |
dbf6c367 | 9328 | |
9ca77b08 | 9329 | attrs = lookup_attribute ("nonnull", attrs); |
9330 | if (attrs == NULL_TREE) | |
9331 | return; | |
9332 | ||
9333 | a = attrs; | |
9334 | /* See if any of the nonnull attributes has no arguments. If so, | |
9335 | then every pointer argument is checked (in which case the check | |
9336 | for pointer type is done in check_nonnull_arg). */ | |
9337 | if (TREE_VALUE (a) != NULL_TREE) | |
9338 | do | |
9339 | a = lookup_attribute ("nonnull", TREE_CHAIN (a)); | |
9340 | while (a != NULL_TREE && TREE_VALUE (a) != NULL_TREE); | |
9341 | ||
9342 | if (a != NULL_TREE) | |
9343 | for (i = 0; i < nargs; i++) | |
9344 | check_function_arguments_recurse (check_nonnull_arg, NULL, argarray[i], | |
9345 | i + 1); | |
9346 | else | |
dbf6c367 | 9347 | { |
9ca77b08 | 9348 | /* Walk the argument list. If we encounter an argument number we |
9349 | should check for non-null, do it. */ | |
9350 | for (i = 0; i < nargs; i++) | |
dbf6c367 | 9351 | { |
9ca77b08 | 9352 | for (a = attrs; ; a = TREE_CHAIN (a)) |
4ee9c684 | 9353 | { |
9ca77b08 | 9354 | a = lookup_attribute ("nonnull", a); |
9355 | if (a == NULL_TREE || nonnull_check_p (TREE_VALUE (a), i + 1)) | |
9356 | break; | |
4ee9c684 | 9357 | } |
9ca77b08 | 9358 | |
9359 | if (a != NULL_TREE) | |
9360 | check_function_arguments_recurse (check_nonnull_arg, NULL, | |
9361 | argarray[i], i + 1); | |
dbf6c367 | 9362 | } |
9363 | } | |
9364 | } | |
9365 | ||
50ca527f | 9366 | /* Check that the Nth argument of a function call (counting backwards |
d01f58f9 | 9367 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
9368 | array ARGARRAY. */ | |
bf6c8de0 | 9369 | |
9370 | static void | |
774e9d58 | 9371 | check_function_sentinel (const_tree fntype, int nargs, tree *argarray) |
bf6c8de0 | 9372 | { |
774e9d58 | 9373 | tree attr = lookup_attribute ("sentinel", TYPE_ATTRIBUTES (fntype)); |
bf6c8de0 | 9374 | |
9375 | if (attr) | |
9376 | { | |
d01f58f9 | 9377 | int len = 0; |
9378 | int pos = 0; | |
9379 | tree sentinel; | |
774e9d58 | 9380 | function_args_iterator iter; |
9381 | tree t; | |
a0c938f0 | 9382 | |
d01f58f9 | 9383 | /* Skip over the named arguments. */ |
774e9d58 | 9384 | FOREACH_FUNCTION_ARGS (fntype, t, iter) |
a0c938f0 | 9385 | { |
774e9d58 | 9386 | if (len == nargs) |
9387 | break; | |
d01f58f9 | 9388 | len++; |
9389 | } | |
50ca527f | 9390 | |
d01f58f9 | 9391 | if (TREE_VALUE (attr)) |
9392 | { | |
9393 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
f9ae6f95 | 9394 | pos = TREE_INT_CST_LOW (p); |
d01f58f9 | 9395 | } |
50ca527f | 9396 | |
d01f58f9 | 9397 | /* The sentinel must be one of the varargs, i.e. |
9398 | in position >= the number of fixed arguments. */ | |
9399 | if ((nargs - 1 - pos) < len) | |
9400 | { | |
77a357e3 | 9401 | warning (OPT_Wformat_, |
d01f58f9 | 9402 | "not enough variable arguments to fit a sentinel"); |
9403 | return; | |
bf6c8de0 | 9404 | } |
d01f58f9 | 9405 | |
9406 | /* Validate the sentinel. */ | |
9407 | sentinel = argarray[nargs - 1 - pos]; | |
9408 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
9409 | || !integer_zerop (sentinel)) | |
9410 | /* Although __null (in C++) is only an integer we allow it | |
9411 | nevertheless, as we are guaranteed that it's exactly | |
9412 | as wide as a pointer, and we don't want to force | |
9413 | users to cast the NULL they have written there. | |
9414 | We warn with -Wstrict-null-sentinel, though. */ | |
9415 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
77a357e3 | 9416 | warning (OPT_Wformat_, "missing sentinel in function call"); |
bf6c8de0 | 9417 | } |
9418 | } | |
9419 | ||
dbf6c367 | 9420 | /* Helper for check_function_nonnull; given a list of operands which |
9421 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
9422 | checked. */ | |
9423 | ||
9424 | static bool | |
1cae46be | 9425 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 9426 | { |
4ee9c684 | 9427 | unsigned HOST_WIDE_INT arg_num = 0; |
dbf6c367 | 9428 | |
9429 | for (; args; args = TREE_CHAIN (args)) | |
9430 | { | |
231bd014 | 9431 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
9432 | ||
9433 | gcc_assert (found); | |
dbf6c367 | 9434 | |
9435 | if (arg_num == param_num) | |
9436 | return true; | |
9437 | } | |
9438 | return false; | |
9439 | } | |
9440 | ||
9441 | /* Check that the function argument PARAM (which is operand number | |
9442 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
9443 | via check_function_arguments_recurse. */ | |
9444 | ||
9445 | static void | |
9a03a746 | 9446 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
1cae46be | 9447 | unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 9448 | { |
9449 | /* Just skip checking the argument if it's not a pointer. This can | |
9450 | happen if the "nonnull" attribute was given without an operand | |
9451 | list (which means to check every pointer argument). */ | |
9452 | ||
9453 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
9454 | return; | |
9455 | ||
9456 | if (integer_zerop (param)) | |
155b601b | 9457 | warning (OPT_Wnonnull, "null argument where non-null required " |
9458 | "(argument %lu)", (unsigned long) param_num); | |
dbf6c367 | 9459 | } |
9460 | ||
9461 | /* Helper for nonnull attribute handling; fetch the operand number | |
9462 | from the attribute argument list. */ | |
9463 | ||
9464 | static bool | |
1cae46be | 9465 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
dbf6c367 | 9466 | { |
e913b5cd | 9467 | /* Verify the arg number is a small constant. */ |
e1d65c9f | 9468 | if (tree_fits_uhwi_p (arg_num_expr)) |
e913b5cd | 9469 | { |
f9ae6f95 | 9470 | *valp = TREE_INT_CST_LOW (arg_num_expr); |
e913b5cd | 9471 | return true; |
9472 | } | |
9473 | else | |
dbf6c367 | 9474 | return false; |
dbf6c367 | 9475 | } |
fa987697 | 9476 | |
9477 | /* Handle a "nothrow" attribute; arguments as in | |
9478 | struct attribute_spec.handler. */ | |
9479 | ||
9480 | static tree | |
9a03a746 | 9481 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
9482 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
fa987697 | 9483 | { |
9484 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
9485 | TREE_NOTHROW (*node) = 1; | |
9486 | /* ??? TODO: Support types. */ | |
9487 | else | |
9488 | { | |
9b2d6d13 | 9489 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
fa987697 | 9490 | *no_add_attrs = true; |
9491 | } | |
9492 | ||
9493 | return NULL_TREE; | |
9494 | } | |
7acb29a3 | 9495 | |
9496 | /* Handle a "cleanup" attribute; arguments as in | |
9497 | struct attribute_spec.handler. */ | |
9498 | ||
9499 | static tree | |
1cae46be | 9500 | handle_cleanup_attribute (tree *node, tree name, tree args, |
9a03a746 | 9501 | int ARG_UNUSED (flags), bool *no_add_attrs) |
7acb29a3 | 9502 | { |
9503 | tree decl = *node; | |
9504 | tree cleanup_id, cleanup_decl; | |
9505 | ||
9506 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
9507 | for global destructors in C++. This requires infrastructure that | |
9508 | we don't have generically at the moment. It's also not a feature | |
9509 | we'd be missing too much, since we do have attribute constructor. */ | |
9510 | if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)) | |
9511 | { | |
9b2d6d13 | 9512 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
7acb29a3 | 9513 | *no_add_attrs = true; |
9514 | return NULL_TREE; | |
9515 | } | |
9516 | ||
9517 | /* Verify that the argument is a function in scope. */ | |
9518 | /* ??? We could support pointers to functions here as well, if | |
9519 | that was considered desirable. */ | |
9520 | cleanup_id = TREE_VALUE (args); | |
9521 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
9522 | { | |
07e3a3d2 | 9523 | error ("cleanup argument not an identifier"); |
7acb29a3 | 9524 | *no_add_attrs = true; |
9525 | return NULL_TREE; | |
9526 | } | |
d1c41717 | 9527 | cleanup_decl = lookup_name (cleanup_id); |
7acb29a3 | 9528 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
9529 | { | |
07e3a3d2 | 9530 | error ("cleanup argument not a function"); |
7acb29a3 | 9531 | *no_add_attrs = true; |
9532 | return NULL_TREE; | |
9533 | } | |
9534 | ||
1cae46be | 9535 | /* That the function has proper type is checked with the |
7acb29a3 | 9536 | eventual call to build_function_call. */ |
9537 | ||
9538 | return NULL_TREE; | |
9539 | } | |
8a8cdb8d | 9540 | |
9541 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
9542 | ||
9543 | static tree | |
9544 | handle_warn_unused_result_attribute (tree *node, tree name, | |
9a03a746 | 9545 | tree ARG_UNUSED (args), |
9546 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8a8cdb8d | 9547 | { |
9548 | /* Ignore the attribute for functions not returning any value. */ | |
9549 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
9550 | { | |
9b2d6d13 | 9551 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
8a8cdb8d | 9552 | *no_add_attrs = true; |
9553 | } | |
9554 | ||
9555 | return NULL_TREE; | |
9556 | } | |
bf6c8de0 | 9557 | |
9558 | /* Handle a "sentinel" attribute. */ | |
9559 | ||
9560 | static tree | |
50ca527f | 9561 | handle_sentinel_attribute (tree *node, tree name, tree args, |
bf6c8de0 | 9562 | int ARG_UNUSED (flags), bool *no_add_attrs) |
9563 | { | |
a36cf284 | 9564 | if (!prototype_p (*node)) |
bf6c8de0 | 9565 | { |
9b2d6d13 | 9566 | warning (OPT_Wattributes, |
9567 | "%qE attribute requires prototypes with named arguments", name); | |
bf6c8de0 | 9568 | *no_add_attrs = true; |
bf6c8de0 | 9569 | } |
50ca527f | 9570 | else |
9571 | { | |
c33080b9 | 9572 | if (!stdarg_p (*node)) |
a0c938f0 | 9573 | { |
9b2d6d13 | 9574 | warning (OPT_Wattributes, |
9575 | "%qE attribute only applies to variadic functions", name); | |
50ca527f | 9576 | *no_add_attrs = true; |
9577 | } | |
9578 | } | |
a0c938f0 | 9579 | |
50ca527f | 9580 | if (args) |
bf6c8de0 | 9581 | { |
50ca527f | 9582 | tree position = TREE_VALUE (args); |
3e5a8b00 | 9583 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
9584 | && TREE_CODE (position) != FUNCTION_DECL) | |
9585 | position = default_conversion (position); | |
50ca527f | 9586 | |
3e5a8b00 | 9587 | if (TREE_CODE (position) != INTEGER_CST |
9588 | || !INTEGRAL_TYPE_P (TREE_TYPE (position))) | |
a0c938f0 | 9589 | { |
48e1416a | 9590 | warning (OPT_Wattributes, |
01b54db5 | 9591 | "requested position is not an integer constant"); |
50ca527f | 9592 | *no_add_attrs = true; |
9593 | } | |
9594 | else | |
a0c938f0 | 9595 | { |
50ca527f | 9596 | if (tree_int_cst_lt (position, integer_zero_node)) |
9597 | { | |
01b54db5 | 9598 | warning (OPT_Wattributes, |
9599 | "requested position is less than zero"); | |
50ca527f | 9600 | *no_add_attrs = true; |
9601 | } | |
9602 | } | |
bf6c8de0 | 9603 | } |
a0c938f0 | 9604 | |
bf6c8de0 | 9605 | return NULL_TREE; |
9606 | } | |
b5c26b42 | 9607 | |
9608 | /* Handle a "type_generic" attribute. */ | |
9609 | ||
9610 | static tree | |
9611 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
9612 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9613 | bool * ARG_UNUSED (no_add_attrs)) | |
9614 | { | |
19fbe3a4 | 9615 | /* Ensure we have a function type. */ |
9616 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
48e1416a | 9617 | |
19fbe3a4 | 9618 | /* Ensure we have a variadic function. */ |
c33080b9 | 9619 | gcc_assert (!prototype_p (*node) || stdarg_p (*node)); |
b5c26b42 | 9620 | |
9621 | return NULL_TREE; | |
9622 | } | |
46f8e3b0 | 9623 | |
24470055 | 9624 | /* Handle a "target" attribute. */ |
46f8e3b0 | 9625 | |
9626 | static tree | |
24470055 | 9627 | handle_target_attribute (tree *node, tree name, tree args, int flags, |
46f8e3b0 | 9628 | bool *no_add_attrs) |
9629 | { | |
9630 | /* Ensure we have a function type. */ | |
9631 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9632 | { | |
9633 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9634 | *no_add_attrs = true; | |
9635 | } | |
46f8e3b0 | 9636 | else if (! targetm.target_option.valid_attribute_p (*node, name, args, |
ae0c3984 | 9637 | flags)) |
46f8e3b0 | 9638 | *no_add_attrs = true; |
9639 | ||
9640 | return NULL_TREE; | |
9641 | } | |
9642 | ||
9643 | /* Arguments being collected for optimization. */ | |
9644 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
f1f41a6c | 9645 | static GTY(()) vec<const_char_p, va_gc> *optimize_args; |
46f8e3b0 | 9646 | |
9647 | ||
9648 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
9649 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
9650 | false for #pragma GCC optimize. */ | |
9651 | ||
9652 | bool | |
9653 | parse_optimize_options (tree args, bool attr_p) | |
9654 | { | |
9655 | bool ret = true; | |
9656 | unsigned opt_argc; | |
9657 | unsigned i; | |
2becf397 | 9658 | int saved_flag_strict_aliasing; |
46f8e3b0 | 9659 | const char **opt_argv; |
615ef0bb | 9660 | struct cl_decoded_option *decoded_options; |
9661 | unsigned int decoded_options_count; | |
46f8e3b0 | 9662 | tree ap; |
9663 | ||
9664 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
9665 | collected strings. */ | |
f1f41a6c | 9666 | vec_safe_truncate (optimize_args, 0); |
9667 | vec_safe_push (optimize_args, (const char *) NULL); | |
46f8e3b0 | 9668 | |
9669 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
9670 | { | |
9671 | tree value = TREE_VALUE (ap); | |
9672 | ||
9673 | if (TREE_CODE (value) == INTEGER_CST) | |
9674 | { | |
9675 | char buffer[20]; | |
f9ae6f95 | 9676 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); |
f1f41a6c | 9677 | vec_safe_push (optimize_args, ggc_strdup (buffer)); |
46f8e3b0 | 9678 | } |
9679 | ||
9680 | else if (TREE_CODE (value) == STRING_CST) | |
9681 | { | |
9682 | /* Split string into multiple substrings. */ | |
9683 | size_t len = TREE_STRING_LENGTH (value); | |
9684 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
9685 | char *end = p + len; | |
9686 | char *comma; | |
9687 | char *next_p = p; | |
9688 | ||
9689 | while (next_p != NULL) | |
9690 | { | |
9691 | size_t len2; | |
9692 | char *q, *r; | |
9693 | ||
9694 | p = next_p; | |
9695 | comma = strchr (p, ','); | |
9696 | if (comma) | |
9697 | { | |
9698 | len2 = comma - p; | |
9699 | *comma = '\0'; | |
9700 | next_p = comma+1; | |
9701 | } | |
9702 | else | |
9703 | { | |
9704 | len2 = end - p; | |
9705 | next_p = NULL; | |
9706 | } | |
9707 | ||
ba72912a | 9708 | r = q = (char *) ggc_alloc_atomic (len2 + 3); |
46f8e3b0 | 9709 | |
9710 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx | |
9711 | options. */ | |
9712 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
9713 | { | |
9714 | ret = false; | |
9715 | if (attr_p) | |
9716 | warning (OPT_Wattributes, | |
ebd7c4c1 | 9717 | "bad option %s to optimize attribute", p); |
46f8e3b0 | 9718 | else |
9719 | warning (OPT_Wpragmas, | |
e44b0a1f | 9720 | "bad option %s to pragma attribute", p); |
46f8e3b0 | 9721 | continue; |
9722 | } | |
9723 | ||
9724 | if (*p != '-') | |
9725 | { | |
9726 | *r++ = '-'; | |
9727 | ||
9728 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
9729 | itself is -Os, and any other switch begins with a -f. */ | |
9730 | if ((*p >= '0' && *p <= '9') | |
9731 | || (p[0] == 's' && p[1] == '\0')) | |
9732 | *r++ = 'O'; | |
9733 | else if (*p != 'O') | |
9734 | *r++ = 'f'; | |
9735 | } | |
9736 | ||
9737 | memcpy (r, p, len2); | |
9738 | r[len2] = '\0'; | |
f1f41a6c | 9739 | vec_safe_push (optimize_args, (const char *) q); |
46f8e3b0 | 9740 | } |
9741 | ||
9742 | } | |
9743 | } | |
9744 | ||
f1f41a6c | 9745 | opt_argc = optimize_args->length (); |
46f8e3b0 | 9746 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); |
9747 | ||
9748 | for (i = 1; i < opt_argc; i++) | |
f1f41a6c | 9749 | opt_argv[i] = (*optimize_args)[i]; |
46f8e3b0 | 9750 | |
2becf397 | 9751 | saved_flag_strict_aliasing = flag_strict_aliasing; |
9752 | ||
46f8e3b0 | 9753 | /* Now parse the options. */ |
f3f006ad | 9754 | decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv, |
9755 | &decoded_options, | |
9756 | &decoded_options_count); | |
9757 | decode_options (&global_options, &global_options_set, | |
3c6c0e40 | 9758 | decoded_options, decoded_options_count, |
9759 | input_location, global_dc); | |
46f8e3b0 | 9760 | |
4bec06b3 | 9761 | targetm.override_options_after_change(); |
9762 | ||
2becf397 | 9763 | /* Don't allow changing -fstrict-aliasing. */ |
9764 | flag_strict_aliasing = saved_flag_strict_aliasing; | |
9765 | ||
f1f41a6c | 9766 | optimize_args->truncate (0); |
46f8e3b0 | 9767 | return ret; |
9768 | } | |
9769 | ||
9770 | /* For handling "optimize" attribute. arguments as in | |
9771 | struct attribute_spec.handler. */ | |
9772 | ||
9773 | static tree | |
9774 | handle_optimize_attribute (tree *node, tree name, tree args, | |
9775 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
9776 | { | |
9777 | /* Ensure we have a function type. */ | |
9778 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9779 | { | |
9780 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9781 | *no_add_attrs = true; | |
9782 | } | |
9783 | else | |
9784 | { | |
9785 | struct cl_optimization cur_opts; | |
9786 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
9787 | ||
9788 | /* Save current options. */ | |
2c5d2e39 | 9789 | cl_optimization_save (&cur_opts, &global_options); |
46f8e3b0 | 9790 | |
9791 | /* If we previously had some optimization options, use them as the | |
9792 | default. */ | |
9793 | if (old_opts) | |
2c5d2e39 | 9794 | cl_optimization_restore (&global_options, |
9795 | TREE_OPTIMIZATION (old_opts)); | |
46f8e3b0 | 9796 | |
9797 | /* Parse options, and update the vector. */ | |
9798 | parse_optimize_options (args, true); | |
9799 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
55310327 | 9800 | = build_optimization_node (&global_options); |
46f8e3b0 | 9801 | |
9802 | /* Restore current options. */ | |
2c5d2e39 | 9803 | cl_optimization_restore (&global_options, &cur_opts); |
46f8e3b0 | 9804 | } |
9805 | ||
9806 | return NULL_TREE; | |
9807 | } | |
48b14f50 | 9808 | |
9809 | /* Handle a "no_split_stack" attribute. */ | |
9810 | ||
9811 | static tree | |
9812 | handle_no_split_stack_attribute (tree *node, tree name, | |
9813 | tree ARG_UNUSED (args), | |
9814 | int ARG_UNUSED (flags), | |
9815 | bool *no_add_attrs) | |
9816 | { | |
9817 | tree decl = *node; | |
9818 | ||
9819 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
9820 | { | |
9821 | error_at (DECL_SOURCE_LOCATION (decl), | |
9822 | "%qE attribute applies only to functions", name); | |
9823 | *no_add_attrs = true; | |
9824 | } | |
9825 | else if (DECL_INITIAL (decl)) | |
9826 | { | |
9827 | error_at (DECL_SOURCE_LOCATION (decl), | |
9828 | "can%'t set %qE attribute after definition", name); | |
9829 | *no_add_attrs = true; | |
9830 | } | |
9831 | ||
9832 | return NULL_TREE; | |
9833 | } | |
d7dcba40 | 9834 | |
9835 | /* Handle a "returns_nonnull" attribute; arguments as in | |
9836 | struct attribute_spec.handler. */ | |
9837 | ||
9838 | static tree | |
9839 | handle_returns_nonnull_attribute (tree *node, tree, tree, int, | |
9840 | bool *no_add_attrs) | |
9841 | { | |
9842 | // Even without a prototype we still have a return type we can check. | |
9843 | if (TREE_CODE (TREE_TYPE (*node)) != POINTER_TYPE) | |
9844 | { | |
9845 | error ("returns_nonnull attribute on a function not returning a pointer"); | |
9846 | *no_add_attrs = true; | |
9847 | } | |
9848 | return NULL_TREE; | |
9849 | } | |
9850 | ||
74691f46 | 9851 | /* Handle a "designated_init" attribute; arguments as in |
9852 | struct attribute_spec.handler. */ | |
9853 | ||
9854 | static tree | |
9855 | handle_designated_init_attribute (tree *node, tree name, tree, int, | |
9856 | bool *no_add_attrs) | |
9857 | { | |
9858 | if (TREE_CODE (*node) != RECORD_TYPE) | |
9859 | { | |
9860 | error ("%qE attribute is only valid on %<struct%> type", name); | |
9861 | *no_add_attrs = true; | |
9862 | } | |
9863 | return NULL_TREE; | |
9864 | } | |
9865 | ||
dbf6c367 | 9866 | \f |
774e9d58 | 9867 | /* Check for valid arguments being passed to a function with FNTYPE. |
9868 | There are NARGS arguments in the array ARGARRAY. */ | |
dbf6c367 | 9869 | void |
774e9d58 | 9870 | check_function_arguments (const_tree fntype, int nargs, tree *argarray) |
dbf6c367 | 9871 | { |
9872 | /* Check for null being passed in a pointer argument that must be | |
9873 | non-null. We also need to do this if format checking is enabled. */ | |
9874 | ||
9875 | if (warn_nonnull) | |
774e9d58 | 9876 | check_function_nonnull (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
dbf6c367 | 9877 | |
9878 | /* Check for errors in format strings. */ | |
9879 | ||
068bea1e | 9880 | if (warn_format || warn_suggest_attribute_format) |
774e9d58 | 9881 | check_function_format (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
95c90e04 | 9882 | |
9883 | if (warn_format) | |
774e9d58 | 9884 | check_function_sentinel (fntype, nargs, argarray); |
dbf6c367 | 9885 | } |
9886 | ||
9887 | /* Generic argument checking recursion routine. PARAM is the argument to | |
9888 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
9889 | once the argument is resolved. CTX is context for the callback. */ | |
9890 | void | |
1cae46be | 9891 | check_function_arguments_recurse (void (*callback) |
9892 | (void *, tree, unsigned HOST_WIDE_INT), | |
9893 | void *ctx, tree param, | |
9894 | unsigned HOST_WIDE_INT param_num) | |
dbf6c367 | 9895 | { |
72dd6141 | 9896 | if (CONVERT_EXPR_P (param) |
c44afe23 | 9897 | && (TYPE_PRECISION (TREE_TYPE (param)) |
9898 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
dbf6c367 | 9899 | { |
9900 | /* Strip coercion. */ | |
9901 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 9902 | TREE_OPERAND (param, 0), param_num); |
dbf6c367 | 9903 | return; |
9904 | } | |
9905 | ||
9906 | if (TREE_CODE (param) == CALL_EXPR) | |
9907 | { | |
c2f47e15 | 9908 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
dbf6c367 | 9909 | tree attrs; |
9910 | bool found_format_arg = false; | |
9911 | ||
9912 | /* See if this is a call to a known internationalization function | |
9913 | that modifies a format arg. Such a function may have multiple | |
9914 | format_arg attributes (for example, ngettext). */ | |
9915 | ||
9916 | for (attrs = TYPE_ATTRIBUTES (type); | |
9917 | attrs; | |
9918 | attrs = TREE_CHAIN (attrs)) | |
9919 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
9920 | { | |
c2f47e15 | 9921 | tree inner_arg; |
dbf6c367 | 9922 | tree format_num_expr; |
9923 | int format_num; | |
9924 | int i; | |
c2f47e15 | 9925 | call_expr_arg_iterator iter; |
dbf6c367 | 9926 | |
9927 | /* Extract the argument number, which was previously checked | |
9928 | to be valid. */ | |
9929 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
ddb1be65 | 9930 | |
e913b5cd | 9931 | format_num = tree_to_uhwi (format_num_expr); |
dbf6c367 | 9932 | |
c2f47e15 | 9933 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
9934 | inner_arg != 0; | |
9935 | inner_arg = next_call_expr_arg (&iter), i++) | |
dbf6c367 | 9936 | if (i == format_num) |
9937 | { | |
9938 | check_function_arguments_recurse (callback, ctx, | |
c2f47e15 | 9939 | inner_arg, param_num); |
dbf6c367 | 9940 | found_format_arg = true; |
9941 | break; | |
9942 | } | |
9943 | } | |
9944 | ||
9945 | /* If we found a format_arg attribute and did a recursive check, | |
9946 | we are done with checking this argument. Otherwise, we continue | |
9947 | and this will be considered a non-literal. */ | |
9948 | if (found_format_arg) | |
9949 | return; | |
9950 | } | |
9951 | ||
9952 | if (TREE_CODE (param) == COND_EXPR) | |
9953 | { | |
9954 | /* Check both halves of the conditional expression. */ | |
9955 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 9956 | TREE_OPERAND (param, 1), param_num); |
dbf6c367 | 9957 | check_function_arguments_recurse (callback, ctx, |
4ee9c684 | 9958 | TREE_OPERAND (param, 2), param_num); |
dbf6c367 | 9959 | return; |
9960 | } | |
9961 | ||
9962 | (*callback) (ctx, param, param_num); | |
9963 | } | |
1f3233d1 | 9964 | |
60cce472 | 9965 | /* Checks for a builtin function FNDECL that the number of arguments |
9966 | NARGS against the required number REQUIRED and issues an error if | |
9967 | there is a mismatch. Returns true if the number of arguments is | |
9968 | correct, otherwise false. */ | |
d43cee80 | 9969 | |
9970 | static bool | |
60cce472 | 9971 | builtin_function_validate_nargs (tree fndecl, int nargs, int required) |
d43cee80 | 9972 | { |
9973 | if (nargs < required) | |
9974 | { | |
60cce472 | 9975 | error_at (input_location, |
9976 | "not enough arguments to function %qE", fndecl); | |
d43cee80 | 9977 | return false; |
9978 | } | |
9979 | else if (nargs > required) | |
9980 | { | |
60cce472 | 9981 | error_at (input_location, |
9982 | "too many arguments to function %qE", fndecl); | |
d43cee80 | 9983 | return false; |
9984 | } | |
9985 | return true; | |
9986 | } | |
9987 | ||
9988 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
9989 | Returns false if there was an error, otherwise true. */ | |
9990 | ||
9991 | bool | |
9992 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
9993 | { | |
9994 | if (!DECL_BUILT_IN (fndecl) | |
9995 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
9996 | return true; | |
9997 | ||
9998 | switch (DECL_FUNCTION_CODE (fndecl)) | |
9999 | { | |
10000 | case BUILT_IN_CONSTANT_P: | |
60cce472 | 10001 | return builtin_function_validate_nargs (fndecl, nargs, 1); |
d43cee80 | 10002 | |
10003 | case BUILT_IN_ISFINITE: | |
10004 | case BUILT_IN_ISINF: | |
c319d56a | 10005 | case BUILT_IN_ISINF_SIGN: |
d43cee80 | 10006 | case BUILT_IN_ISNAN: |
10007 | case BUILT_IN_ISNORMAL: | |
60cce472 | 10008 | if (builtin_function_validate_nargs (fndecl, nargs, 1)) |
d43cee80 | 10009 | { |
10010 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
10011 | { | |
10012 | error ("non-floating-point argument in call to " | |
10013 | "function %qE", fndecl); | |
10014 | return false; | |
10015 | } | |
10016 | return true; | |
10017 | } | |
10018 | return false; | |
10019 | ||
10020 | case BUILT_IN_ISGREATER: | |
10021 | case BUILT_IN_ISGREATEREQUAL: | |
10022 | case BUILT_IN_ISLESS: | |
10023 | case BUILT_IN_ISLESSEQUAL: | |
10024 | case BUILT_IN_ISLESSGREATER: | |
10025 | case BUILT_IN_ISUNORDERED: | |
60cce472 | 10026 | if (builtin_function_validate_nargs (fndecl, nargs, 2)) |
d43cee80 | 10027 | { |
10028 | enum tree_code code0, code1; | |
10029 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
10030 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
10031 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
10032 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
10033 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
10034 | { | |
10035 | error ("non-floating-point arguments in call to " | |
10036 | "function %qE", fndecl); | |
10037 | return false; | |
10038 | } | |
10039 | return true; | |
10040 | } | |
10041 | return false; | |
10042 | ||
19fbe3a4 | 10043 | case BUILT_IN_FPCLASSIFY: |
60cce472 | 10044 | if (builtin_function_validate_nargs (fndecl, nargs, 6)) |
19fbe3a4 | 10045 | { |
10046 | unsigned i; | |
48e1416a | 10047 | |
19fbe3a4 | 10048 | for (i=0; i<5; i++) |
10049 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
10050 | { | |
10051 | error ("non-const integer argument %u in call to function %qE", | |
10052 | i+1, fndecl); | |
10053 | return false; | |
10054 | } | |
10055 | ||
10056 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
10057 | { | |
10058 | error ("non-floating-point argument in call to function %qE", | |
10059 | fndecl); | |
10060 | return false; | |
10061 | } | |
10062 | return true; | |
10063 | } | |
10064 | return false; | |
10065 | ||
fca0886c | 10066 | case BUILT_IN_ASSUME_ALIGNED: |
10067 | if (builtin_function_validate_nargs (fndecl, nargs, 2 + (nargs > 2))) | |
10068 | { | |
10069 | if (nargs >= 3 && TREE_CODE (TREE_TYPE (args[2])) != INTEGER_TYPE) | |
10070 | { | |
10071 | error ("non-integer argument 3 in call to function %qE", fndecl); | |
10072 | return false; | |
10073 | } | |
10074 | return true; | |
10075 | } | |
10076 | return false; | |
10077 | ||
0c93c8a9 | 10078 | case BUILT_IN_ADD_OVERFLOW: |
10079 | case BUILT_IN_SUB_OVERFLOW: | |
10080 | case BUILT_IN_MUL_OVERFLOW: | |
10081 | if (builtin_function_validate_nargs (fndecl, nargs, 3)) | |
10082 | { | |
10083 | unsigned i; | |
10084 | for (i = 0; i < 2; i++) | |
10085 | if (!INTEGRAL_TYPE_P (TREE_TYPE (args[i]))) | |
10086 | { | |
10087 | error ("argument %u in call to function %qE does not have " | |
10088 | "integral type", i + 1, fndecl); | |
10089 | return false; | |
10090 | } | |
10091 | if (TREE_CODE (TREE_TYPE (args[2])) != POINTER_TYPE | |
10092 | || TREE_CODE (TREE_TYPE (TREE_TYPE (args[2]))) != INTEGER_TYPE) | |
10093 | { | |
10094 | error ("argument 3 in call to function %qE does not have " | |
10095 | "pointer to integer type", fndecl); | |
10096 | return false; | |
10097 | } | |
10098 | return true; | |
10099 | } | |
10100 | return false; | |
10101 | ||
d43cee80 | 10102 | default: |
10103 | return true; | |
10104 | } | |
10105 | } | |
10106 | ||
860251be | 10107 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
10108 | ||
10109 | int | |
10110 | field_decl_cmp (const void *x_p, const void *y_p) | |
10111 | { | |
4fd61bc6 | 10112 | const tree *const x = (const tree *const) x_p; |
10113 | const tree *const y = (const tree *const) y_p; | |
10114 | ||
860251be | 10115 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
10116 | /* A nontype is "greater" than a type. */ | |
10117 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
10118 | if (DECL_NAME (*x) == NULL_TREE) | |
10119 | return -1; | |
10120 | if (DECL_NAME (*y) == NULL_TREE) | |
10121 | return 1; | |
10122 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
10123 | return -1; | |
10124 | return 1; | |
10125 | } | |
10126 | ||
10127 | static struct { | |
10128 | gt_pointer_operator new_value; | |
10129 | void *cookie; | |
10130 | } resort_data; | |
10131 | ||
10132 | /* This routine compares two fields like field_decl_cmp but using the | |
10133 | pointer operator in resort_data. */ | |
10134 | ||
10135 | static int | |
10136 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
10137 | { | |
4fd61bc6 | 10138 | const tree *const x = (const tree *const) x_p; |
10139 | const tree *const y = (const tree *const) y_p; | |
860251be | 10140 | |
10141 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
10142 | /* A nontype is "greater" than a type. */ | |
10143 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
10144 | if (DECL_NAME (*x) == NULL_TREE) | |
10145 | return -1; | |
10146 | if (DECL_NAME (*y) == NULL_TREE) | |
10147 | return 1; | |
10148 | { | |
10149 | tree d1 = DECL_NAME (*x); | |
10150 | tree d2 = DECL_NAME (*y); | |
10151 | resort_data.new_value (&d1, resort_data.cookie); | |
10152 | resort_data.new_value (&d2, resort_data.cookie); | |
10153 | if (d1 < d2) | |
10154 | return -1; | |
10155 | } | |
10156 | return 1; | |
10157 | } | |
10158 | ||
10159 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
10160 | ||
10161 | void | |
10162 | resort_sorted_fields (void *obj, | |
9a03a746 | 10163 | void * ARG_UNUSED (orig_obj), |
4ee9c684 | 10164 | gt_pointer_operator new_value, |
10165 | void *cookie) | |
860251be | 10166 | { |
9a03a746 | 10167 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
860251be | 10168 | resort_data.new_value = new_value; |
10169 | resort_data.cookie = cookie; | |
10170 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
4ee9c684 | 10171 | resort_field_decl_cmp); |
860251be | 10172 | } |
10173 | ||
209c9752 | 10174 | /* Subroutine of c_parse_error. |
10175 | Return the result of concatenating LHS and RHS. RHS is really | |
10176 | a string literal, its first character is indicated by RHS_START and | |
cfee01e3 | 10177 | RHS_SIZE is its length (including the terminating NUL character). |
209c9752 | 10178 | |
10179 | The caller is responsible for deleting the returned pointer. */ | |
10180 | ||
10181 | static char * | |
10182 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
10183 | { | |
10184 | const int lhs_size = strlen (lhs); | |
10185 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
10186 | strncpy (result, lhs, lhs_size); | |
10187 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
10188 | return result; | |
10189 | } | |
10190 | ||
380c6697 | 10191 | /* Issue the error given by GMSGID, indicating that it occurred before |
92b128ed | 10192 | TOKEN, which had the associated VALUE. */ |
10193 | ||
10194 | void | |
48e1416a | 10195 | c_parse_error (const char *gmsgid, enum cpp_ttype token_type, |
ba99525e | 10196 | tree value, unsigned char token_flags) |
92b128ed | 10197 | { |
209c9752 | 10198 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
10199 | ||
10200 | char *message = NULL; | |
92b128ed | 10201 | |
ba99525e | 10202 | if (token_type == CPP_EOF) |
380c6697 | 10203 | message = catenate_messages (gmsgid, " at end of input"); |
48e1416a | 10204 | else if (token_type == CPP_CHAR |
10205 | || token_type == CPP_WCHAR | |
ba99525e | 10206 | || token_type == CPP_CHAR16 |
10207 | || token_type == CPP_CHAR32) | |
92b128ed | 10208 | { |
f9ae6f95 | 10209 | unsigned int val = TREE_INT_CST_LOW (value); |
924bbf02 | 10210 | const char *prefix; |
10211 | ||
ba99525e | 10212 | switch (token_type) |
924bbf02 | 10213 | { |
10214 | default: | |
10215 | prefix = ""; | |
10216 | break; | |
10217 | case CPP_WCHAR: | |
10218 | prefix = "L"; | |
10219 | break; | |
10220 | case CPP_CHAR16: | |
10221 | prefix = "u"; | |
10222 | break; | |
10223 | case CPP_CHAR32: | |
10224 | prefix = "U"; | |
10225 | break; | |
10226 | } | |
10227 | ||
92b128ed | 10228 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
a0c938f0 | 10229 | message = catenate_messages (gmsgid, " before %s'%c'"); |
92b128ed | 10230 | else |
a0c938f0 | 10231 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
209c9752 | 10232 | |
924bbf02 | 10233 | error (message, prefix, val); |
209c9752 | 10234 | free (message); |
10235 | message = NULL; | |
92b128ed | 10236 | } |
1898176c | 10237 | else if (token_type == CPP_CHAR_USERDEF |
10238 | || token_type == CPP_WCHAR_USERDEF | |
10239 | || token_type == CPP_CHAR16_USERDEF | |
10240 | || token_type == CPP_CHAR32_USERDEF) | |
10241 | message = catenate_messages (gmsgid, | |
10242 | " before user-defined character literal"); | |
10243 | else if (token_type == CPP_STRING_USERDEF | |
10244 | || token_type == CPP_WSTRING_USERDEF | |
10245 | || token_type == CPP_STRING16_USERDEF | |
10246 | || token_type == CPP_STRING32_USERDEF | |
10247 | || token_type == CPP_UTF8STRING_USERDEF) | |
10248 | message = catenate_messages (gmsgid, " before user-defined string literal"); | |
48e1416a | 10249 | else if (token_type == CPP_STRING |
10250 | || token_type == CPP_WSTRING | |
ba99525e | 10251 | || token_type == CPP_STRING16 |
538ba11a | 10252 | || token_type == CPP_STRING32 |
10253 | || token_type == CPP_UTF8STRING) | |
380c6697 | 10254 | message = catenate_messages (gmsgid, " before string constant"); |
ba99525e | 10255 | else if (token_type == CPP_NUMBER) |
380c6697 | 10256 | message = catenate_messages (gmsgid, " before numeric constant"); |
ba99525e | 10257 | else if (token_type == CPP_NAME) |
209c9752 | 10258 | { |
380c6697 | 10259 | message = catenate_messages (gmsgid, " before %qE"); |
782858b8 | 10260 | error (message, value); |
209c9752 | 10261 | free (message); |
10262 | message = NULL; | |
10263 | } | |
ba99525e | 10264 | else if (token_type == CPP_PRAGMA) |
b75b98aa | 10265 | message = catenate_messages (gmsgid, " before %<#pragma%>"); |
ba99525e | 10266 | else if (token_type == CPP_PRAGMA_EOL) |
b75b98aa | 10267 | message = catenate_messages (gmsgid, " before end of line"); |
07b8f133 | 10268 | else if (token_type == CPP_DECLTYPE) |
10269 | message = catenate_messages (gmsgid, " before %<decltype%>"); | |
ba99525e | 10270 | else if (token_type < N_TTYPES) |
209c9752 | 10271 | { |
380c6697 | 10272 | message = catenate_messages (gmsgid, " before %qs token"); |
ba99525e | 10273 | error (message, cpp_type2name (token_type, token_flags)); |
209c9752 | 10274 | free (message); |
10275 | message = NULL; | |
10276 | } | |
92b128ed | 10277 | else |
380c6697 | 10278 | error (gmsgid); |
209c9752 | 10279 | |
10280 | if (message) | |
10281 | { | |
10282 | error (message); | |
10283 | free (message); | |
10284 | } | |
a0c938f0 | 10285 | #undef catenate_messages |
92b128ed | 10286 | } |
10287 | ||
3a79f5da | 10288 | /* Return the gcc option code associated with the reason for a cpp |
10289 | message, or 0 if none. */ | |
10290 | ||
10291 | static int | |
10292 | c_option_controlling_cpp_error (int reason) | |
10293 | { | |
7ff8db31 | 10294 | const struct cpp_reason_option_codes_t *entry; |
3a79f5da | 10295 | |
7ff8db31 | 10296 | for (entry = cpp_reason_option_codes; entry->reason != CPP_W_NONE; entry++) |
3a79f5da | 10297 | { |
10298 | if (entry->reason == reason) | |
10299 | return entry->option_code; | |
10300 | } | |
10301 | return 0; | |
10302 | } | |
10303 | ||
7f5f3953 | 10304 | /* Callback from cpp_error for PFILE to print diagnostics from the |
3a79f5da | 10305 | preprocessor. The diagnostic is of type LEVEL, with REASON set |
10306 | to the reason code if LEVEL is represents a warning, at location | |
7f5f3953 | 10307 | LOCATION unless this is after lexing and the compiler's location |
10308 | should be used instead, with column number possibly overridden by | |
10309 | COLUMN_OVERRIDE if not zero; MSG is the translated message and AP | |
10310 | the arguments. Returns true if a diagnostic was emitted, false | |
10311 | otherwise. */ | |
10312 | ||
10313 | bool | |
3a79f5da | 10314 | c_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level, int reason, |
7f5f3953 | 10315 | location_t location, unsigned int column_override, |
10316 | const char *msg, va_list *ap) | |
10317 | { | |
10318 | diagnostic_info diagnostic; | |
10319 | diagnostic_t dlevel; | |
5ae82d58 | 10320 | bool save_warn_system_headers = global_dc->dc_warn_system_headers; |
7f5f3953 | 10321 | bool ret; |
10322 | ||
10323 | switch (level) | |
10324 | { | |
10325 | case CPP_DL_WARNING_SYSHDR: | |
10326 | if (flag_no_output) | |
10327 | return false; | |
5ae82d58 | 10328 | global_dc->dc_warn_system_headers = 1; |
7f5f3953 | 10329 | /* Fall through. */ |
10330 | case CPP_DL_WARNING: | |
10331 | if (flag_no_output) | |
10332 | return false; | |
10333 | dlevel = DK_WARNING; | |
10334 | break; | |
10335 | case CPP_DL_PEDWARN: | |
10336 | if (flag_no_output && !flag_pedantic_errors) | |
10337 | return false; | |
10338 | dlevel = DK_PEDWARN; | |
10339 | break; | |
10340 | case CPP_DL_ERROR: | |
10341 | dlevel = DK_ERROR; | |
10342 | break; | |
10343 | case CPP_DL_ICE: | |
10344 | dlevel = DK_ICE; | |
10345 | break; | |
10346 | case CPP_DL_NOTE: | |
10347 | dlevel = DK_NOTE; | |
10348 | break; | |
ff903809 | 10349 | case CPP_DL_FATAL: |
10350 | dlevel = DK_FATAL; | |
10351 | break; | |
7f5f3953 | 10352 | default: |
10353 | gcc_unreachable (); | |
10354 | } | |
10355 | if (done_lexing) | |
10356 | location = input_location; | |
10357 | diagnostic_set_info_translated (&diagnostic, msg, ap, | |
10358 | location, dlevel); | |
10359 | if (column_override) | |
10360 | diagnostic_override_column (&diagnostic, column_override); | |
3a79f5da | 10361 | diagnostic_override_option_index (&diagnostic, |
10362 | c_option_controlling_cpp_error (reason)); | |
7f5f3953 | 10363 | ret = report_diagnostic (&diagnostic); |
10364 | if (level == CPP_DL_WARNING_SYSHDR) | |
5ae82d58 | 10365 | global_dc->dc_warn_system_headers = save_warn_system_headers; |
7f5f3953 | 10366 | return ret; |
10367 | } | |
10368 | ||
624d37a6 | 10369 | /* Convert a character from the host to the target execution character |
10370 | set. cpplib handles this, mostly. */ | |
10371 | ||
10372 | HOST_WIDE_INT | |
10373 | c_common_to_target_charset (HOST_WIDE_INT c) | |
10374 | { | |
10375 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
10376 | zero-extended under -fno-signed-char. cpplib insists that characters | |
10377 | and character constants are always unsigned. Hence we must convert | |
10378 | back and forth. */ | |
10379 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
10380 | ||
10381 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
10382 | ||
10383 | if (flag_signed_char) | |
10384 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
10385 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
10386 | else | |
10387 | return uc; | |
10388 | } | |
10389 | ||
7549df0d | 10390 | /* Fold an offsetof-like expression. EXPR is a nested sequence of component |
10391 | references with an INDIRECT_REF of a constant at the bottom; much like the | |
10392 | traditional rendering of offsetof as a macro. Return the folded result. */ | |
af28855b | 10393 | |
7549df0d | 10394 | tree |
10395 | fold_offsetof_1 (tree expr) | |
af28855b | 10396 | { |
af28855b | 10397 | tree base, off, t; |
10398 | ||
10399 | switch (TREE_CODE (expr)) | |
10400 | { | |
10401 | case ERROR_MARK: | |
10402 | return expr; | |
10403 | ||
6b11d2e3 | 10404 | case VAR_DECL: |
10405 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
10406 | return error_mark_node; | |
10407 | ||
d897f7c2 | 10408 | case CALL_EXPR: |
cf1a89a3 | 10409 | case TARGET_EXPR: |
d897f7c2 | 10410 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); |
10411 | return error_mark_node; | |
10412 | ||
d897f7c2 | 10413 | case NOP_EXPR: |
10414 | case INDIRECT_REF: | |
7549df0d | 10415 | if (!TREE_CONSTANT (TREE_OPERAND (expr, 0))) |
64ed018c | 10416 | { |
10417 | error ("cannot apply %<offsetof%> to a non constant address"); | |
10418 | return error_mark_node; | |
10419 | } | |
7549df0d | 10420 | return TREE_OPERAND (expr, 0); |
d897f7c2 | 10421 | |
af28855b | 10422 | case COMPONENT_REF: |
7549df0d | 10423 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
af28855b | 10424 | if (base == error_mark_node) |
10425 | return base; | |
10426 | ||
10427 | t = TREE_OPERAND (expr, 1); | |
10428 | if (DECL_C_BIT_FIELD (t)) | |
10429 | { | |
10430 | error ("attempt to take address of bit-field structure " | |
782858b8 | 10431 | "member %qD", t); |
af28855b | 10432 | return error_mark_node; |
10433 | } | |
389dd41b | 10434 | off = size_binop_loc (input_location, PLUS_EXPR, DECL_FIELD_OFFSET (t), |
e913b5cd | 10435 | size_int (tree_to_uhwi (DECL_FIELD_BIT_OFFSET (t)) |
389dd41b | 10436 | / BITS_PER_UNIT)); |
af28855b | 10437 | break; |
10438 | ||
10439 | case ARRAY_REF: | |
7549df0d | 10440 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
af28855b | 10441 | if (base == error_mark_node) |
10442 | return base; | |
10443 | ||
10444 | t = TREE_OPERAND (expr, 1); | |
64ed018c | 10445 | |
10446 | /* Check if the offset goes beyond the upper bound of the array. */ | |
7549df0d | 10447 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) >= 0) |
e0559d69 | 10448 | { |
10449 | tree upbound = array_ref_up_bound (expr); | |
10450 | if (upbound != NULL_TREE | |
10451 | && TREE_CODE (upbound) == INTEGER_CST | |
10452 | && !tree_int_cst_equal (upbound, | |
10453 | TYPE_MAX_VALUE (TREE_TYPE (upbound)))) | |
10454 | { | |
10455 | upbound = size_binop (PLUS_EXPR, upbound, | |
10456 | build_int_cst (TREE_TYPE (upbound), 1)); | |
10457 | if (tree_int_cst_lt (upbound, t)) | |
10458 | { | |
10459 | tree v; | |
10460 | ||
10461 | for (v = TREE_OPERAND (expr, 0); | |
10462 | TREE_CODE (v) == COMPONENT_REF; | |
10463 | v = TREE_OPERAND (v, 0)) | |
10464 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (v, 0))) | |
10465 | == RECORD_TYPE) | |
10466 | { | |
1767a056 | 10467 | tree fld_chain = DECL_CHAIN (TREE_OPERAND (v, 1)); |
10468 | for (; fld_chain; fld_chain = DECL_CHAIN (fld_chain)) | |
e0559d69 | 10469 | if (TREE_CODE (fld_chain) == FIELD_DECL) |
10470 | break; | |
10471 | ||
10472 | if (fld_chain) | |
10473 | break; | |
10474 | } | |
10475 | /* Don't warn if the array might be considered a poor | |
10476 | man's flexible array member with a very permissive | |
10477 | definition thereof. */ | |
10478 | if (TREE_CODE (v) == ARRAY_REF | |
10479 | || TREE_CODE (v) == COMPONENT_REF) | |
10480 | warning (OPT_Warray_bounds, | |
10481 | "index %E denotes an offset " | |
10482 | "greater than size of %qT", | |
10483 | t, TREE_TYPE (TREE_OPERAND (expr, 0))); | |
10484 | } | |
10485 | } | |
10486 | } | |
7549df0d | 10487 | |
10488 | t = convert (sizetype, t); | |
10489 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
af28855b | 10490 | break; |
10491 | ||
ede90cc2 | 10492 | case COMPOUND_EXPR: |
10493 | /* Handle static members of volatile structs. */ | |
10494 | t = TREE_OPERAND (expr, 1); | |
10495 | gcc_assert (TREE_CODE (t) == VAR_DECL); | |
7549df0d | 10496 | return fold_offsetof_1 (t); |
ede90cc2 | 10497 | |
af28855b | 10498 | default: |
231bd014 | 10499 | gcc_unreachable (); |
af28855b | 10500 | } |
10501 | ||
7549df0d | 10502 | return fold_build_pointer_plus (base, off); |
af28855b | 10503 | } |
10504 | ||
7549df0d | 10505 | /* Likewise, but convert it to the return type of offsetof. */ |
10506 | ||
af28855b | 10507 | tree |
7549df0d | 10508 | fold_offsetof (tree expr) |
af28855b | 10509 | { |
7549df0d | 10510 | return convert (size_type_node, fold_offsetof_1 (expr)); |
af28855b | 10511 | } |
10512 | ||
b9bdfa0b | 10513 | /* Warn for A ?: C expressions (with B omitted) where A is a boolean |
10514 | expression, because B will always be true. */ | |
10515 | ||
10516 | void | |
10517 | warn_for_omitted_condop (location_t location, tree cond) | |
10518 | { | |
10519 | if (truth_value_p (TREE_CODE (cond))) | |
10520 | warning_at (location, OPT_Wparentheses, | |
10521 | "the omitted middle operand in ?: will always be %<true%>, " | |
10522 | "suggest explicit middle operand"); | |
10523 | } | |
10524 | ||
a1f90215 | 10525 | /* Give an error for storing into ARG, which is 'const'. USE indicates |
10526 | how ARG was being used. */ | |
10527 | ||
10528 | void | |
f2697631 | 10529 | readonly_error (location_t loc, tree arg, enum lvalue_use use) |
a1f90215 | 10530 | { |
10531 | gcc_assert (use == lv_assign || use == lv_increment || use == lv_decrement | |
10532 | || use == lv_asm); | |
10533 | /* Using this macro rather than (for example) arrays of messages | |
10534 | ensures that all the format strings are checked at compile | |
10535 | time. */ | |
10536 | #define READONLY_MSG(A, I, D, AS) (use == lv_assign ? (A) \ | |
10537 | : (use == lv_increment ? (I) \ | |
10538 | : (use == lv_decrement ? (D) : (AS)))) | |
10539 | if (TREE_CODE (arg) == COMPONENT_REF) | |
10540 | { | |
10541 | if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0)))) | |
f2697631 | 10542 | error_at (loc, READONLY_MSG (G_("assignment of member " |
10543 | "%qD in read-only object"), | |
10544 | G_("increment of member " | |
10545 | "%qD in read-only object"), | |
10546 | G_("decrement of member " | |
10547 | "%qD in read-only object"), | |
10548 | G_("member %qD in read-only object " | |
10549 | "used as %<asm%> output")), | |
10550 | TREE_OPERAND (arg, 1)); | |
a1f90215 | 10551 | else |
f2697631 | 10552 | error_at (loc, READONLY_MSG (G_("assignment of read-only member %qD"), |
10553 | G_("increment of read-only member %qD"), | |
10554 | G_("decrement of read-only member %qD"), | |
10555 | G_("read-only member %qD used as %<asm%> output")), | |
10556 | TREE_OPERAND (arg, 1)); | |
a1f90215 | 10557 | } |
10558 | else if (TREE_CODE (arg) == VAR_DECL) | |
f2697631 | 10559 | error_at (loc, READONLY_MSG (G_("assignment of read-only variable %qD"), |
10560 | G_("increment of read-only variable %qD"), | |
10561 | G_("decrement of read-only variable %qD"), | |
10562 | G_("read-only variable %qD used as %<asm%> output")), | |
10563 | arg); | |
a1f90215 | 10564 | else if (TREE_CODE (arg) == PARM_DECL) |
f2697631 | 10565 | error_at (loc, READONLY_MSG (G_("assignment of read-only parameter %qD"), |
10566 | G_("increment of read-only parameter %qD"), | |
10567 | G_("decrement of read-only parameter %qD"), | |
10568 | G_("read-only parameter %qD use as %<asm%> output")), | |
10569 | arg); | |
a1f90215 | 10570 | else if (TREE_CODE (arg) == RESULT_DECL) |
10571 | { | |
10572 | gcc_assert (c_dialect_cxx ()); | |
f2697631 | 10573 | error_at (loc, READONLY_MSG (G_("assignment of " |
10574 | "read-only named return value %qD"), | |
10575 | G_("increment of " | |
10576 | "read-only named return value %qD"), | |
10577 | G_("decrement of " | |
10578 | "read-only named return value %qD"), | |
10579 | G_("read-only named return value %qD " | |
10580 | "used as %<asm%>output")), | |
10581 | arg); | |
a1f90215 | 10582 | } |
10583 | else if (TREE_CODE (arg) == FUNCTION_DECL) | |
f2697631 | 10584 | error_at (loc, READONLY_MSG (G_("assignment of function %qD"), |
10585 | G_("increment of function %qD"), | |
10586 | G_("decrement of function %qD"), | |
10587 | G_("function %qD used as %<asm%> output")), | |
10588 | arg); | |
a1f90215 | 10589 | else |
f2697631 | 10590 | error_at (loc, READONLY_MSG (G_("assignment of read-only location %qE"), |
10591 | G_("increment of read-only location %qE"), | |
10592 | G_("decrement of read-only location %qE"), | |
10593 | G_("read-only location %qE used as %<asm%> output")), | |
10594 | arg); | |
a1f90215 | 10595 | } |
10596 | ||
e35976b1 | 10597 | /* Print an error message for an invalid lvalue. USE says |
fdd84b77 | 10598 | how the lvalue is being used and so selects the error message. LOC |
10599 | is the location for the error. */ | |
ab6bb714 | 10600 | |
e35976b1 | 10601 | void |
fdd84b77 | 10602 | lvalue_error (location_t loc, enum lvalue_use use) |
ab6bb714 | 10603 | { |
e35976b1 | 10604 | switch (use) |
ab6bb714 | 10605 | { |
e35976b1 | 10606 | case lv_assign: |
fdd84b77 | 10607 | error_at (loc, "lvalue required as left operand of assignment"); |
e35976b1 | 10608 | break; |
10609 | case lv_increment: | |
fdd84b77 | 10610 | error_at (loc, "lvalue required as increment operand"); |
e35976b1 | 10611 | break; |
10612 | case lv_decrement: | |
fdd84b77 | 10613 | error_at (loc, "lvalue required as decrement operand"); |
e35976b1 | 10614 | break; |
10615 | case lv_addressof: | |
fdd84b77 | 10616 | error_at (loc, "lvalue required as unary %<&%> operand"); |
e35976b1 | 10617 | break; |
10618 | case lv_asm: | |
fdd84b77 | 10619 | error_at (loc, "lvalue required in asm statement"); |
e35976b1 | 10620 | break; |
10621 | default: | |
10622 | gcc_unreachable (); | |
ab6bb714 | 10623 | } |
ab6bb714 | 10624 | } |
b1bbc8e5 | 10625 | |
10626 | /* Print an error message for an invalid indirection of type TYPE. | |
10627 | ERRSTRING is the name of the operator for the indirection. */ | |
10628 | ||
10629 | void | |
10630 | invalid_indirection_error (location_t loc, tree type, ref_operator errstring) | |
10631 | { | |
10632 | switch (errstring) | |
10633 | { | |
10634 | case RO_NULL: | |
10635 | gcc_assert (c_dialect_cxx ()); | |
10636 | error_at (loc, "invalid type argument (have %qT)", type); | |
10637 | break; | |
10638 | case RO_ARRAY_INDEXING: | |
10639 | error_at (loc, | |
10640 | "invalid type argument of array indexing (have %qT)", | |
10641 | type); | |
10642 | break; | |
10643 | case RO_UNARY_STAR: | |
10644 | error_at (loc, | |
10645 | "invalid type argument of unary %<*%> (have %qT)", | |
10646 | type); | |
10647 | break; | |
10648 | case RO_ARROW: | |
10649 | error_at (loc, | |
10650 | "invalid type argument of %<->%> (have %qT)", | |
10651 | type); | |
10652 | break; | |
7354a89b | 10653 | case RO_ARROW_STAR: |
10654 | error_at (loc, | |
10655 | "invalid type argument of %<->*%> (have %qT)", | |
10656 | type); | |
10657 | break; | |
b1bbc8e5 | 10658 | case RO_IMPLICIT_CONVERSION: |
10659 | error_at (loc, | |
10660 | "invalid type argument of implicit conversion (have %qT)", | |
10661 | type); | |
10662 | break; | |
10663 | default: | |
10664 | gcc_unreachable (); | |
10665 | } | |
10666 | } | |
c271bdb2 | 10667 | \f |
10668 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
10669 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
10670 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
10671 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
10672 | ||
10673 | int | |
10674 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
10675 | { | |
10676 | tree maxindex, type, main_type, elt, unqual_elt; | |
10677 | int failure = 0, quals; | |
6753bca0 | 10678 | hashval_t hashcode = 0; |
f5298614 | 10679 | bool overflow_p = false; |
c271bdb2 | 10680 | |
10681 | maxindex = size_zero_node; | |
10682 | if (initial_value) | |
10683 | { | |
10684 | if (TREE_CODE (initial_value) == STRING_CST) | |
10685 | { | |
10686 | int eltsize | |
10687 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
10688 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
10689 | } | |
10690 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
10691 | { | |
f1f41a6c | 10692 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initial_value); |
c271bdb2 | 10693 | |
f1f41a6c | 10694 | if (vec_safe_is_empty (v)) |
c271bdb2 | 10695 | { |
10696 | if (pedantic) | |
10697 | failure = 3; | |
7542c3b4 | 10698 | maxindex = ssize_int (-1); |
c271bdb2 | 10699 | } |
10700 | else | |
10701 | { | |
10702 | tree curindex; | |
c75b4594 | 10703 | unsigned HOST_WIDE_INT cnt; |
10704 | constructor_elt *ce; | |
cee43f7e | 10705 | bool fold_p = false; |
c271bdb2 | 10706 | |
f1f41a6c | 10707 | if ((*v)[0].index) |
f5298614 | 10708 | maxindex = (*v)[0].index, fold_p = true; |
10709 | ||
c271bdb2 | 10710 | curindex = maxindex; |
10711 | ||
f1f41a6c | 10712 | for (cnt = 1; vec_safe_iterate (v, cnt, &ce); cnt++) |
c271bdb2 | 10713 | { |
cee43f7e | 10714 | bool curfold_p = false; |
c75b4594 | 10715 | if (ce->index) |
cee43f7e | 10716 | curindex = ce->index, curfold_p = true; |
c271bdb2 | 10717 | else |
cee43f7e | 10718 | { |
10719 | if (fold_p) | |
f5298614 | 10720 | { |
10721 | /* Since we treat size types now as ordinary | |
10722 | unsigned types, we need an explicit overflow | |
10723 | check. */ | |
10724 | tree orig = curindex; | |
10725 | curindex = fold_convert (sizetype, curindex); | |
10726 | overflow_p |= tree_int_cst_lt (curindex, orig); | |
10727 | } | |
389dd41b | 10728 | curindex = size_binop (PLUS_EXPR, curindex, |
10729 | size_one_node); | |
cee43f7e | 10730 | } |
c271bdb2 | 10731 | if (tree_int_cst_lt (maxindex, curindex)) |
cee43f7e | 10732 | maxindex = curindex, fold_p = curfold_p; |
c271bdb2 | 10733 | } |
f5298614 | 10734 | if (fold_p) |
10735 | { | |
10736 | tree orig = maxindex; | |
10737 | maxindex = fold_convert (sizetype, maxindex); | |
10738 | overflow_p |= tree_int_cst_lt (maxindex, orig); | |
10739 | } | |
c271bdb2 | 10740 | } |
10741 | } | |
10742 | else | |
10743 | { | |
10744 | /* Make an error message unless that happened already. */ | |
10745 | if (initial_value != error_mark_node) | |
10746 | failure = 1; | |
10747 | } | |
10748 | } | |
10749 | else | |
10750 | { | |
10751 | failure = 2; | |
10752 | if (!do_default) | |
10753 | return failure; | |
10754 | } | |
10755 | ||
10756 | type = *ptype; | |
10757 | elt = TREE_TYPE (type); | |
10758 | quals = TYPE_QUALS (strip_array_types (elt)); | |
10759 | if (quals == 0) | |
10760 | unqual_elt = elt; | |
10761 | else | |
6d5d708e | 10762 | unqual_elt = c_build_qualified_type (elt, KEEP_QUAL_ADDR_SPACE (quals)); |
c271bdb2 | 10763 | |
10764 | /* Using build_distinct_type_copy and modifying things afterward instead | |
10765 | of using build_array_type to create a new type preserves all of the | |
10766 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
10767 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
10768 | TREE_TYPE (main_type) = unqual_elt; | |
783bb57e | 10769 | TYPE_DOMAIN (main_type) |
10770 | = build_range_type (TREE_TYPE (maxindex), | |
10771 | build_int_cst (TREE_TYPE (maxindex), 0), maxindex); | |
c271bdb2 | 10772 | layout_type (main_type); |
10773 | ||
6753bca0 | 10774 | /* Make sure we have the canonical MAIN_TYPE. */ |
10775 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
48e1416a | 10776 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), |
6753bca0 | 10777 | hashcode); |
10778 | main_type = type_hash_canon (hashcode, main_type); | |
10779 | ||
796735dc | 10780 | /* Fix the canonical type. */ |
10781 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
10782 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
10783 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
10784 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
10785 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
10786 | != TYPE_DOMAIN (main_type))) | |
48e1416a | 10787 | TYPE_CANONICAL (main_type) |
796735dc | 10788 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), |
10789 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
10790 | else | |
10791 | TYPE_CANONICAL (main_type) = main_type; | |
10792 | ||
c271bdb2 | 10793 | if (quals == 0) |
10794 | type = main_type; | |
10795 | else | |
10796 | type = c_build_qualified_type (main_type, quals); | |
10797 | ||
4f5b8f2a | 10798 | if (COMPLETE_TYPE_P (type) |
10799 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
f5298614 | 10800 | && (overflow_p || TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))) |
4f5b8f2a | 10801 | { |
10802 | error ("size of array is too large"); | |
10803 | /* If we proceed with the array type as it is, we'll eventually | |
08f817b3 | 10804 | crash in tree_to_[su]hwi(). */ |
4f5b8f2a | 10805 | type = error_mark_node; |
10806 | } | |
10807 | ||
c271bdb2 | 10808 | *ptype = type; |
10809 | return failure; | |
10810 | } | |
ab6bb714 | 10811 | |
93426222 | 10812 | /* Like c_mark_addressable but don't check register qualifier. */ |
10813 | void | |
10814 | c_common_mark_addressable_vec (tree t) | |
10815 | { | |
10816 | while (handled_component_p (t)) | |
10817 | t = TREE_OPERAND (t, 0); | |
10818 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
10819 | return; | |
10820 | TREE_ADDRESSABLE (t) = 1; | |
10821 | } | |
10822 | ||
10823 | ||
b6a5fc45 | 10824 | \f |
10825 | /* Used to help initialize the builtin-types.def table. When a type of | |
10826 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
10827 | The later results in segfaults even when a decl using the type doesn't | |
10828 | get invoked. */ | |
10829 | ||
10830 | tree | |
10831 | builtin_type_for_size (int size, bool unsignedp) | |
10832 | { | |
a51edb4c | 10833 | tree type = c_common_type_for_size (size, unsignedp); |
b6a5fc45 | 10834 | return type ? type : error_mark_node; |
10835 | } | |
10836 | ||
10837 | /* A helper function for resolve_overloaded_builtin in resolving the | |
10838 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
10839 | first operand of PARAMS is a pointer to a supported data type. | |
10840 | Returns 0 if an error is encountered. */ | |
10841 | ||
10842 | static int | |
f1f41a6c | 10843 | sync_resolve_size (tree function, vec<tree, va_gc> *params) |
b6a5fc45 | 10844 | { |
10845 | tree type; | |
10846 | int size; | |
10847 | ||
f1f41a6c | 10848 | if (!params) |
b6a5fc45 | 10849 | { |
10850 | error ("too few arguments to function %qE", function); | |
10851 | return 0; | |
10852 | } | |
10853 | ||
f1f41a6c | 10854 | type = TREE_TYPE ((*params)[0]); |
0d284870 | 10855 | if (TREE_CODE (type) == ARRAY_TYPE) |
10856 | { | |
10857 | /* Force array-to-pointer decay for C++. */ | |
10858 | gcc_assert (c_dialect_cxx()); | |
10859 | (*params)[0] = default_conversion ((*params)[0]); | |
10860 | type = TREE_TYPE ((*params)[0]); | |
10861 | } | |
b6a5fc45 | 10862 | if (TREE_CODE (type) != POINTER_TYPE) |
10863 | goto incompatible; | |
10864 | ||
10865 | type = TREE_TYPE (type); | |
10866 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
10867 | goto incompatible; | |
10868 | ||
e913b5cd | 10869 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
27213ba3 | 10870 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
b6a5fc45 | 10871 | return size; |
10872 | ||
10873 | incompatible: | |
10874 | error ("incompatible type for argument %d of %qE", 1, function); | |
10875 | return 0; | |
10876 | } | |
10877 | ||
a0c938f0 | 10878 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
b6a5fc45 | 10879 | PARAMS to make arguments match up with those of FUNCTION. Drops |
10880 | the variadic arguments at the end. Returns false if some error | |
10881 | was encountered; true on success. */ | |
10882 | ||
10883 | static bool | |
1cd6e20d | 10884 | sync_resolve_params (location_t loc, tree orig_function, tree function, |
f1f41a6c | 10885 | vec<tree, va_gc> *params, bool orig_format) |
b6a5fc45 | 10886 | { |
d0af78c5 | 10887 | function_args_iterator iter; |
b6a5fc45 | 10888 | tree ptype; |
b9c74b4d | 10889 | unsigned int parmnum; |
b6a5fc45 | 10890 | |
d0af78c5 | 10891 | function_args_iter_init (&iter, TREE_TYPE (function)); |
b6a5fc45 | 10892 | /* We've declared the implementation functions to use "volatile void *" |
10893 | as the pointer parameter, so we shouldn't get any complaints from the | |
10894 | call to check_function_arguments what ever type the user used. */ | |
d0af78c5 | 10895 | function_args_iter_next (&iter); |
f1f41a6c | 10896 | ptype = TREE_TYPE (TREE_TYPE ((*params)[0])); |
b560fabd | 10897 | ptype = TYPE_MAIN_VARIANT (ptype); |
b6a5fc45 | 10898 | |
10899 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
10900 | don't get warnings for passing pointer types, etc. */ | |
b9c74b4d | 10901 | parmnum = 0; |
d0af78c5 | 10902 | while (1) |
b6a5fc45 | 10903 | { |
d0af78c5 | 10904 | tree val, arg_type; |
10905 | ||
10906 | arg_type = function_args_iter_cond (&iter); | |
10907 | /* XXX void_type_node belies the abstraction. */ | |
10908 | if (arg_type == void_type_node) | |
10909 | break; | |
b6a5fc45 | 10910 | |
b9c74b4d | 10911 | ++parmnum; |
f1f41a6c | 10912 | if (params->length () <= parmnum) |
b6a5fc45 | 10913 | { |
1cd6e20d | 10914 | error_at (loc, "too few arguments to function %qE", orig_function); |
b6a5fc45 | 10915 | return false; |
10916 | } | |
10917 | ||
0f6a7cb7 | 10918 | /* Only convert parameters if arg_type is unsigned integer type with |
10919 | new format sync routines, i.e. don't attempt to convert pointer | |
10920 | arguments (e.g. EXPECTED argument of __atomic_compare_exchange_n), | |
10921 | bool arguments (e.g. WEAK argument) or signed int arguments (memmodel | |
10922 | kinds). */ | |
10923 | if (TREE_CODE (arg_type) == INTEGER_TYPE && TYPE_UNSIGNED (arg_type)) | |
1cd6e20d | 10924 | { |
10925 | /* Ideally for the first conversion we'd use convert_for_assignment | |
10926 | so that we get warnings for anything that doesn't match the pointer | |
10927 | type. This isn't portable across the C and C++ front ends atm. */ | |
f1f41a6c | 10928 | val = (*params)[parmnum]; |
1cd6e20d | 10929 | val = convert (ptype, val); |
10930 | val = convert (arg_type, val); | |
f1f41a6c | 10931 | (*params)[parmnum] = val; |
1cd6e20d | 10932 | } |
b6a5fc45 | 10933 | |
d0af78c5 | 10934 | function_args_iter_next (&iter); |
b6a5fc45 | 10935 | } |
10936 | ||
1cd6e20d | 10937 | /* __atomic routines are not variadic. */ |
f1f41a6c | 10938 | if (!orig_format && params->length () != parmnum + 1) |
1cd6e20d | 10939 | { |
10940 | error_at (loc, "too many arguments to function %qE", orig_function); | |
10941 | return false; | |
10942 | } | |
10943 | ||
b6a5fc45 | 10944 | /* The definition of these primitives is variadic, with the remaining |
10945 | being "an optional list of variables protected by the memory barrier". | |
10946 | No clue what that's supposed to mean, precisely, but we consider all | |
10947 | call-clobbered variables to be protected so we're safe. */ | |
f1f41a6c | 10948 | params->truncate (parmnum + 1); |
b6a5fc45 | 10949 | |
10950 | return true; | |
10951 | } | |
10952 | ||
a0c938f0 | 10953 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
b6a5fc45 | 10954 | RESULT to make it match the type of the first pointer argument in |
10955 | PARAMS. */ | |
10956 | ||
10957 | static tree | |
1cd6e20d | 10958 | sync_resolve_return (tree first_param, tree result, bool orig_format) |
b6a5fc45 | 10959 | { |
b9c74b4d | 10960 | tree ptype = TREE_TYPE (TREE_TYPE (first_param)); |
1cd6e20d | 10961 | tree rtype = TREE_TYPE (result); |
10080eac | 10962 | ptype = TYPE_MAIN_VARIANT (ptype); |
1cd6e20d | 10963 | |
10964 | /* New format doesn't require casting unless the types are the same size. */ | |
10965 | if (orig_format || tree_int_cst_equal (TYPE_SIZE (ptype), TYPE_SIZE (rtype))) | |
10966 | return convert (ptype, result); | |
10967 | else | |
10968 | return result; | |
10969 | } | |
10970 | ||
10971 | /* This function verifies the PARAMS to generic atomic FUNCTION. | |
10972 | It returns the size if all the parameters are the same size, otherwise | |
10973 | 0 is returned if the parameters are invalid. */ | |
10974 | ||
10975 | static int | |
f1f41a6c | 10976 | get_atomic_generic_size (location_t loc, tree function, |
10977 | vec<tree, va_gc> *params) | |
1cd6e20d | 10978 | { |
10979 | unsigned int n_param; | |
10980 | unsigned int n_model; | |
10981 | unsigned int x; | |
10982 | int size_0; | |
10983 | tree type_0; | |
10984 | ||
10985 | /* Determine the parameter makeup. */ | |
10986 | switch (DECL_FUNCTION_CODE (function)) | |
10987 | { | |
10988 | case BUILT_IN_ATOMIC_EXCHANGE: | |
10989 | n_param = 4; | |
10990 | n_model = 1; | |
10991 | break; | |
10992 | case BUILT_IN_ATOMIC_LOAD: | |
10993 | case BUILT_IN_ATOMIC_STORE: | |
10994 | n_param = 3; | |
10995 | n_model = 1; | |
10996 | break; | |
10997 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
10998 | n_param = 6; | |
10999 | n_model = 2; | |
11000 | break; | |
11001 | default: | |
1d581089 | 11002 | gcc_unreachable (); |
1cd6e20d | 11003 | } |
11004 | ||
f1f41a6c | 11005 | if (vec_safe_length (params) != n_param) |
1cd6e20d | 11006 | { |
11007 | error_at (loc, "incorrect number of arguments to function %qE", function); | |
11008 | return 0; | |
11009 | } | |
11010 | ||
11011 | /* Get type of first parameter, and determine its size. */ | |
f1f41a6c | 11012 | type_0 = TREE_TYPE ((*params)[0]); |
0d284870 | 11013 | if (TREE_CODE (type_0) == ARRAY_TYPE) |
11014 | { | |
11015 | /* Force array-to-pointer decay for C++. */ | |
11016 | gcc_assert (c_dialect_cxx()); | |
11017 | (*params)[0] = default_conversion ((*params)[0]); | |
11018 | type_0 = TREE_TYPE ((*params)[0]); | |
11019 | } | |
1d581089 | 11020 | if (TREE_CODE (type_0) != POINTER_TYPE || VOID_TYPE_P (TREE_TYPE (type_0))) |
11021 | { | |
11022 | error_at (loc, "argument 1 of %qE must be a non-void pointer type", | |
11023 | function); | |
11024 | return 0; | |
11025 | } | |
11026 | ||
11027 | /* Types must be compile time constant sizes. */ | |
11028 | if (TREE_CODE ((TYPE_SIZE_UNIT (TREE_TYPE (type_0)))) != INTEGER_CST) | |
1cd6e20d | 11029 | { |
1d581089 | 11030 | error_at (loc, |
11031 | "argument 1 of %qE must be a pointer to a constant size type", | |
11032 | function); | |
1cd6e20d | 11033 | return 0; |
11034 | } | |
1d581089 | 11035 | |
e913b5cd | 11036 | size_0 = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type_0))); |
1cd6e20d | 11037 | |
1d581089 | 11038 | /* Zero size objects are not allowed. */ |
11039 | if (size_0 == 0) | |
11040 | { | |
11041 | error_at (loc, | |
11042 | "argument 1 of %qE must be a pointer to a nonzero size object", | |
11043 | function); | |
11044 | return 0; | |
11045 | } | |
11046 | ||
1cd6e20d | 11047 | /* Check each other parameter is a pointer and the same size. */ |
11048 | for (x = 0; x < n_param - n_model; x++) | |
11049 | { | |
11050 | int size; | |
f1f41a6c | 11051 | tree type = TREE_TYPE ((*params)[x]); |
a04e8d62 | 11052 | /* __atomic_compare_exchange has a bool in the 4th position, skip it. */ |
1cd6e20d | 11053 | if (n_param == 6 && x == 3) |
11054 | continue; | |
11055 | if (!POINTER_TYPE_P (type)) | |
11056 | { | |
11057 | error_at (loc, "argument %d of %qE must be a pointer type", x + 1, | |
11058 | function); | |
11059 | return 0; | |
11060 | } | |
1f6be080 | 11061 | tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
11062 | size = type_size ? tree_to_uhwi (type_size) : 0; | |
1cd6e20d | 11063 | if (size != size_0) |
11064 | { | |
11065 | error_at (loc, "size mismatch in argument %d of %qE", x + 1, | |
11066 | function); | |
11067 | return 0; | |
11068 | } | |
11069 | } | |
11070 | ||
11071 | /* Check memory model parameters for validity. */ | |
11072 | for (x = n_param - n_model ; x < n_param; x++) | |
11073 | { | |
f1f41a6c | 11074 | tree p = (*params)[x]; |
1cd6e20d | 11075 | if (TREE_CODE (p) == INTEGER_CST) |
11076 | { | |
e913b5cd | 11077 | int i = tree_to_uhwi (p); |
a372f7ca | 11078 | if (i < 0 || (memmodel_base (i) >= MEMMODEL_LAST)) |
1cd6e20d | 11079 | { |
11080 | warning_at (loc, OPT_Winvalid_memory_model, | |
11081 | "invalid memory model argument %d of %qE", x + 1, | |
11082 | function); | |
1cd6e20d | 11083 | } |
11084 | } | |
11085 | else | |
11086 | if (!INTEGRAL_TYPE_P (TREE_TYPE (p))) | |
11087 | { | |
11088 | error_at (loc, "non-integer memory model argument %d of %qE", x + 1, | |
11089 | function); | |
11090 | return 0; | |
11091 | } | |
11092 | } | |
11093 | ||
11094 | return size_0; | |
11095 | } | |
11096 | ||
11097 | ||
11098 | /* This will take an __atomic_ generic FUNCTION call, and add a size parameter N | |
11099 | at the beginning of the parameter list PARAMS representing the size of the | |
11100 | objects. This is to match the library ABI requirement. LOC is the location | |
11101 | of the function call. | |
11102 | The new function is returned if it needed rebuilding, otherwise NULL_TREE is | |
11103 | returned to allow the external call to be constructed. */ | |
11104 | ||
11105 | static tree | |
11106 | add_atomic_size_parameter (unsigned n, location_t loc, tree function, | |
f1f41a6c | 11107 | vec<tree, va_gc> *params) |
1cd6e20d | 11108 | { |
11109 | tree size_node; | |
11110 | ||
11111 | /* Insert a SIZE_T parameter as the first param. If there isn't | |
11112 | enough space, allocate a new vector and recursively re-build with that. */ | |
f1f41a6c | 11113 | if (!params->space (1)) |
1cd6e20d | 11114 | { |
11115 | unsigned int z, len; | |
f1f41a6c | 11116 | vec<tree, va_gc> *v; |
1cd6e20d | 11117 | tree f; |
11118 | ||
f1f41a6c | 11119 | len = params->length (); |
11120 | vec_alloc (v, len + 1); | |
5a672e62 | 11121 | v->quick_push (build_int_cst (size_type_node, n)); |
1cd6e20d | 11122 | for (z = 0; z < len; z++) |
f1f41a6c | 11123 | v->quick_push ((*params)[z]); |
ec761d5a | 11124 | f = build_function_call_vec (loc, vNULL, function, v, NULL); |
f1f41a6c | 11125 | vec_free (v); |
1cd6e20d | 11126 | return f; |
11127 | } | |
11128 | ||
11129 | /* Add the size parameter and leave as a function call for processing. */ | |
11130 | size_node = build_int_cst (size_type_node, n); | |
f1f41a6c | 11131 | params->quick_insert (0, size_node); |
1cd6e20d | 11132 | return NULL_TREE; |
11133 | } | |
11134 | ||
11135 | ||
a056826c | 11136 | /* Return whether atomic operations for naturally aligned N-byte |
11137 | arguments are supported, whether inline or through libatomic. */ | |
11138 | static bool | |
11139 | atomic_size_supported_p (int n) | |
11140 | { | |
11141 | switch (n) | |
11142 | { | |
11143 | case 1: | |
11144 | case 2: | |
11145 | case 4: | |
11146 | case 8: | |
11147 | return true; | |
11148 | ||
11149 | case 16: | |
11150 | return targetm.scalar_mode_supported_p (TImode); | |
11151 | ||
11152 | default: | |
11153 | return false; | |
11154 | } | |
11155 | } | |
11156 | ||
1cd6e20d | 11157 | /* This will process an __atomic_exchange function call, determine whether it |
11158 | needs to be mapped to the _N variation, or turned into a library call. | |
11159 | LOC is the location of the builtin call. | |
11160 | FUNCTION is the DECL that has been invoked; | |
11161 | PARAMS is the argument list for the call. The return value is non-null | |
11162 | TRUE is returned if it is translated into the proper format for a call to the | |
11163 | external library, and NEW_RETURN is set the tree for that function. | |
11164 | FALSE is returned if processing for the _N variation is required, and | |
11165 | NEW_RETURN is set to the the return value the result is copied into. */ | |
11166 | static bool | |
11167 | resolve_overloaded_atomic_exchange (location_t loc, tree function, | |
f1f41a6c | 11168 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 11169 | { |
11170 | tree p0, p1, p2, p3; | |
11171 | tree I_type, I_type_ptr; | |
11172 | int n = get_atomic_generic_size (loc, function, params); | |
11173 | ||
1d581089 | 11174 | /* Size of 0 is an error condition. */ |
11175 | if (n == 0) | |
11176 | { | |
11177 | *new_return = error_mark_node; | |
11178 | return true; | |
11179 | } | |
11180 | ||
1cd6e20d | 11181 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 11182 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 11183 | { |
11184 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11185 | return true; | |
11186 | } | |
11187 | ||
11188 | /* Otherwise there is a lockfree match, transform the call from: | |
11189 | void fn(T* mem, T* desired, T* return, model) | |
11190 | into | |
11191 | *return = (T) (fn (In* mem, (In) *desired, model)) */ | |
11192 | ||
f1f41a6c | 11193 | p0 = (*params)[0]; |
11194 | p1 = (*params)[1]; | |
11195 | p2 = (*params)[2]; | |
11196 | p3 = (*params)[3]; | |
1cd6e20d | 11197 | |
11198 | /* Create pointer to appropriate size. */ | |
11199 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11200 | I_type_ptr = build_pointer_type (I_type); | |
11201 | ||
11202 | /* Convert object pointer to required type. */ | |
11203 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 11204 | (*params)[0] = p0; |
1cd6e20d | 11205 | /* Convert new value to required type, and dereference it. */ |
11206 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11207 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 11208 | (*params)[1] = p1; |
1cd6e20d | 11209 | |
11210 | /* Move memory model to the 3rd position, and end param list. */ | |
f1f41a6c | 11211 | (*params)[2] = p3; |
11212 | params->truncate (3); | |
1cd6e20d | 11213 | |
11214 | /* Convert return pointer and dereference it for later assignment. */ | |
11215 | *new_return = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
11216 | ||
11217 | return false; | |
b6a5fc45 | 11218 | } |
11219 | ||
1cd6e20d | 11220 | |
11221 | /* This will process an __atomic_compare_exchange function call, determine | |
11222 | whether it needs to be mapped to the _N variation, or turned into a lib call. | |
11223 | LOC is the location of the builtin call. | |
11224 | FUNCTION is the DECL that has been invoked; | |
11225 | PARAMS is the argument list for the call. The return value is non-null | |
11226 | TRUE is returned if it is translated into the proper format for a call to the | |
11227 | external library, and NEW_RETURN is set the tree for that function. | |
11228 | FALSE is returned if processing for the _N variation is required. */ | |
11229 | ||
11230 | static bool | |
11231 | resolve_overloaded_atomic_compare_exchange (location_t loc, tree function, | |
f1f41a6c | 11232 | vec<tree, va_gc> *params, |
1cd6e20d | 11233 | tree *new_return) |
11234 | { | |
11235 | tree p0, p1, p2; | |
11236 | tree I_type, I_type_ptr; | |
11237 | int n = get_atomic_generic_size (loc, function, params); | |
11238 | ||
1d581089 | 11239 | /* Size of 0 is an error condition. */ |
11240 | if (n == 0) | |
11241 | { | |
11242 | *new_return = error_mark_node; | |
11243 | return true; | |
11244 | } | |
11245 | ||
1cd6e20d | 11246 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 11247 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 11248 | { |
11249 | /* The library generic format does not have the weak parameter, so | |
11250 | remove it from the param list. Since a parameter has been removed, | |
11251 | we can be sure that there is room for the SIZE_T parameter, meaning | |
11252 | there will not be a recursive rebuilding of the parameter list, so | |
11253 | there is no danger this will be done twice. */ | |
11254 | if (n > 0) | |
11255 | { | |
f1f41a6c | 11256 | (*params)[3] = (*params)[4]; |
11257 | (*params)[4] = (*params)[5]; | |
11258 | params->truncate (5); | |
1cd6e20d | 11259 | } |
11260 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11261 | return true; | |
11262 | } | |
11263 | ||
11264 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11265 | bool fn(T* mem, T* desired, T* return, weak, success, failure) | |
11266 | into | |
11267 | bool fn ((In *)mem, (In *)expected, (In) *desired, weak, succ, fail) */ | |
ab2c1de8 | 11268 | |
f1f41a6c | 11269 | p0 = (*params)[0]; |
11270 | p1 = (*params)[1]; | |
11271 | p2 = (*params)[2]; | |
1cd6e20d | 11272 | |
11273 | /* Create pointer to appropriate size. */ | |
11274 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11275 | I_type_ptr = build_pointer_type (I_type); | |
11276 | ||
11277 | /* Convert object pointer to required type. */ | |
11278 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 11279 | (*params)[0] = p0; |
1cd6e20d | 11280 | |
11281 | /* Convert expected pointer to required type. */ | |
11282 | p1 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p1); | |
f1f41a6c | 11283 | (*params)[1] = p1; |
1cd6e20d | 11284 | |
11285 | /* Convert desired value to required type, and dereference it. */ | |
11286 | p2 = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
11287 | p2 = build1 (VIEW_CONVERT_EXPR, I_type, p2); | |
f1f41a6c | 11288 | (*params)[2] = p2; |
1cd6e20d | 11289 | |
11290 | /* The rest of the parameters are fine. NULL means no special return value | |
11291 | processing.*/ | |
11292 | *new_return = NULL; | |
11293 | return false; | |
11294 | } | |
11295 | ||
11296 | ||
11297 | /* This will process an __atomic_load function call, determine whether it | |
11298 | needs to be mapped to the _N variation, or turned into a library call. | |
11299 | LOC is the location of the builtin call. | |
11300 | FUNCTION is the DECL that has been invoked; | |
11301 | PARAMS is the argument list for the call. The return value is non-null | |
11302 | TRUE is returned if it is translated into the proper format for a call to the | |
11303 | external library, and NEW_RETURN is set the tree for that function. | |
11304 | FALSE is returned if processing for the _N variation is required, and | |
11305 | NEW_RETURN is set to the the return value the result is copied into. */ | |
11306 | ||
11307 | static bool | |
11308 | resolve_overloaded_atomic_load (location_t loc, tree function, | |
f1f41a6c | 11309 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 11310 | { |
11311 | tree p0, p1, p2; | |
11312 | tree I_type, I_type_ptr; | |
11313 | int n = get_atomic_generic_size (loc, function, params); | |
11314 | ||
1d581089 | 11315 | /* Size of 0 is an error condition. */ |
11316 | if (n == 0) | |
11317 | { | |
11318 | *new_return = error_mark_node; | |
11319 | return true; | |
11320 | } | |
11321 | ||
1cd6e20d | 11322 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 11323 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 11324 | { |
11325 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11326 | return true; | |
11327 | } | |
11328 | ||
11329 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11330 | void fn(T* mem, T* return, model) | |
11331 | into | |
11332 | *return = (T) (fn ((In *) mem, model)) */ | |
11333 | ||
f1f41a6c | 11334 | p0 = (*params)[0]; |
11335 | p1 = (*params)[1]; | |
11336 | p2 = (*params)[2]; | |
1cd6e20d | 11337 | |
11338 | /* Create pointer to appropriate size. */ | |
11339 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11340 | I_type_ptr = build_pointer_type (I_type); | |
11341 | ||
11342 | /* Convert object pointer to required type. */ | |
11343 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 11344 | (*params)[0] = p0; |
1cd6e20d | 11345 | |
11346 | /* Move memory model to the 2nd position, and end param list. */ | |
f1f41a6c | 11347 | (*params)[1] = p2; |
11348 | params->truncate (2); | |
1cd6e20d | 11349 | |
11350 | /* Convert return pointer and dereference it for later assignment. */ | |
11351 | *new_return = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11352 | ||
11353 | return false; | |
11354 | } | |
11355 | ||
11356 | ||
11357 | /* This will process an __atomic_store function call, determine whether it | |
11358 | needs to be mapped to the _N variation, or turned into a library call. | |
11359 | LOC is the location of the builtin call. | |
11360 | FUNCTION is the DECL that has been invoked; | |
11361 | PARAMS is the argument list for the call. The return value is non-null | |
11362 | TRUE is returned if it is translated into the proper format for a call to the | |
11363 | external library, and NEW_RETURN is set the tree for that function. | |
11364 | FALSE is returned if processing for the _N variation is required, and | |
11365 | NEW_RETURN is set to the the return value the result is copied into. */ | |
11366 | ||
11367 | static bool | |
11368 | resolve_overloaded_atomic_store (location_t loc, tree function, | |
f1f41a6c | 11369 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 11370 | { |
11371 | tree p0, p1; | |
11372 | tree I_type, I_type_ptr; | |
11373 | int n = get_atomic_generic_size (loc, function, params); | |
11374 | ||
1d581089 | 11375 | /* Size of 0 is an error condition. */ |
11376 | if (n == 0) | |
11377 | { | |
11378 | *new_return = error_mark_node; | |
11379 | return true; | |
11380 | } | |
11381 | ||
1cd6e20d | 11382 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 11383 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 11384 | { |
11385 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
11386 | return true; | |
11387 | } | |
11388 | ||
11389 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
11390 | void fn(T* mem, T* value, model) | |
11391 | into | |
11392 | fn ((In *) mem, (In) *value, model) */ | |
11393 | ||
f1f41a6c | 11394 | p0 = (*params)[0]; |
11395 | p1 = (*params)[1]; | |
1cd6e20d | 11396 | |
11397 | /* Create pointer to appropriate size. */ | |
11398 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
11399 | I_type_ptr = build_pointer_type (I_type); | |
11400 | ||
11401 | /* Convert object pointer to required type. */ | |
11402 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 11403 | (*params)[0] = p0; |
1cd6e20d | 11404 | |
11405 | /* Convert new value to required type, and dereference it. */ | |
11406 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
11407 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 11408 | (*params)[1] = p1; |
1cd6e20d | 11409 | |
11410 | /* The memory model is in the right spot already. Return is void. */ | |
11411 | *new_return = NULL_TREE; | |
11412 | ||
11413 | return false; | |
11414 | } | |
11415 | ||
11416 | ||
b6a5fc45 | 11417 | /* Some builtin functions are placeholders for other expressions. This |
11418 | function should be called immediately after parsing the call expression | |
11419 | before surrounding code has committed to the type of the expression. | |
11420 | ||
e60a6f7b | 11421 | LOC is the location of the builtin call. |
11422 | ||
b6a5fc45 | 11423 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. |
11424 | PARAMS is the argument list for the call. The return value is non-null | |
11425 | when expansion is complete, and null if normal processing should | |
11426 | continue. */ | |
11427 | ||
11428 | tree | |
f1f41a6c | 11429 | resolve_overloaded_builtin (location_t loc, tree function, |
11430 | vec<tree, va_gc> *params) | |
b6a5fc45 | 11431 | { |
11432 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
1cd6e20d | 11433 | bool orig_format = true; |
11434 | tree new_return = NULL_TREE; | |
11435 | ||
65441f6f | 11436 | switch (DECL_BUILT_IN_CLASS (function)) |
11437 | { | |
11438 | case BUILT_IN_NORMAL: | |
11439 | break; | |
11440 | case BUILT_IN_MD: | |
11441 | if (targetm.resolve_overloaded_builtin) | |
e60a6f7b | 11442 | return targetm.resolve_overloaded_builtin (loc, function, params); |
65441f6f | 11443 | else |
a0c938f0 | 11444 | return NULL_TREE; |
65441f6f | 11445 | default: |
11446 | return NULL_TREE; | |
11447 | } | |
a0c938f0 | 11448 | |
65441f6f | 11449 | /* Handle BUILT_IN_NORMAL here. */ |
b6a5fc45 | 11450 | switch (orig_code) |
11451 | { | |
1cd6e20d | 11452 | case BUILT_IN_ATOMIC_EXCHANGE: |
11453 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
11454 | case BUILT_IN_ATOMIC_LOAD: | |
11455 | case BUILT_IN_ATOMIC_STORE: | |
11456 | { | |
11457 | /* Handle these 4 together so that they can fall through to the next | |
11458 | case if the call is transformed to an _N variant. */ | |
11459 | switch (orig_code) | |
11460 | { | |
11461 | case BUILT_IN_ATOMIC_EXCHANGE: | |
11462 | { | |
11463 | if (resolve_overloaded_atomic_exchange (loc, function, params, | |
11464 | &new_return)) | |
11465 | return new_return; | |
11466 | /* Change to the _N variant. */ | |
11467 | orig_code = BUILT_IN_ATOMIC_EXCHANGE_N; | |
11468 | break; | |
11469 | } | |
11470 | ||
11471 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
11472 | { | |
11473 | if (resolve_overloaded_atomic_compare_exchange (loc, function, | |
11474 | params, | |
11475 | &new_return)) | |
11476 | return new_return; | |
11477 | /* Change to the _N variant. */ | |
11478 | orig_code = BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N; | |
11479 | break; | |
11480 | } | |
11481 | case BUILT_IN_ATOMIC_LOAD: | |
11482 | { | |
11483 | if (resolve_overloaded_atomic_load (loc, function, params, | |
11484 | &new_return)) | |
11485 | return new_return; | |
11486 | /* Change to the _N variant. */ | |
11487 | orig_code = BUILT_IN_ATOMIC_LOAD_N; | |
11488 | break; | |
11489 | } | |
11490 | case BUILT_IN_ATOMIC_STORE: | |
11491 | { | |
11492 | if (resolve_overloaded_atomic_store (loc, function, params, | |
11493 | &new_return)) | |
11494 | return new_return; | |
11495 | /* Change to the _N variant. */ | |
11496 | orig_code = BUILT_IN_ATOMIC_STORE_N; | |
11497 | break; | |
11498 | } | |
11499 | default: | |
11500 | gcc_unreachable (); | |
11501 | } | |
11502 | /* Fallthrough to the normal processing. */ | |
11503 | } | |
11504 | case BUILT_IN_ATOMIC_EXCHANGE_N: | |
11505 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N: | |
11506 | case BUILT_IN_ATOMIC_LOAD_N: | |
11507 | case BUILT_IN_ATOMIC_STORE_N: | |
11508 | case BUILT_IN_ATOMIC_ADD_FETCH_N: | |
11509 | case BUILT_IN_ATOMIC_SUB_FETCH_N: | |
11510 | case BUILT_IN_ATOMIC_AND_FETCH_N: | |
11511 | case BUILT_IN_ATOMIC_NAND_FETCH_N: | |
11512 | case BUILT_IN_ATOMIC_XOR_FETCH_N: | |
11513 | case BUILT_IN_ATOMIC_OR_FETCH_N: | |
11514 | case BUILT_IN_ATOMIC_FETCH_ADD_N: | |
11515 | case BUILT_IN_ATOMIC_FETCH_SUB_N: | |
11516 | case BUILT_IN_ATOMIC_FETCH_AND_N: | |
11517 | case BUILT_IN_ATOMIC_FETCH_NAND_N: | |
11518 | case BUILT_IN_ATOMIC_FETCH_XOR_N: | |
11519 | case BUILT_IN_ATOMIC_FETCH_OR_N: | |
11520 | { | |
11521 | orig_format = false; | |
11522 | /* Fallthru for parameter processing. */ | |
11523 | } | |
2797f13a | 11524 | case BUILT_IN_SYNC_FETCH_AND_ADD_N: |
11525 | case BUILT_IN_SYNC_FETCH_AND_SUB_N: | |
11526 | case BUILT_IN_SYNC_FETCH_AND_OR_N: | |
11527 | case BUILT_IN_SYNC_FETCH_AND_AND_N: | |
11528 | case BUILT_IN_SYNC_FETCH_AND_XOR_N: | |
11529 | case BUILT_IN_SYNC_FETCH_AND_NAND_N: | |
11530 | case BUILT_IN_SYNC_ADD_AND_FETCH_N: | |
11531 | case BUILT_IN_SYNC_SUB_AND_FETCH_N: | |
11532 | case BUILT_IN_SYNC_OR_AND_FETCH_N: | |
11533 | case BUILT_IN_SYNC_AND_AND_FETCH_N: | |
11534 | case BUILT_IN_SYNC_XOR_AND_FETCH_N: | |
11535 | case BUILT_IN_SYNC_NAND_AND_FETCH_N: | |
11536 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N: | |
11537 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N: | |
11538 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_N: | |
11539 | case BUILT_IN_SYNC_LOCK_RELEASE_N: | |
b6a5fc45 | 11540 | { |
11541 | int n = sync_resolve_size (function, params); | |
b9c74b4d | 11542 | tree new_function, first_param, result; |
b9a16870 | 11543 | enum built_in_function fncode; |
b6a5fc45 | 11544 | |
11545 | if (n == 0) | |
11546 | return error_mark_node; | |
11547 | ||
b9a16870 | 11548 | fncode = (enum built_in_function)((int)orig_code + exact_log2 (n) + 1); |
11549 | new_function = builtin_decl_explicit (fncode); | |
1cd6e20d | 11550 | if (!sync_resolve_params (loc, function, new_function, params, |
11551 | orig_format)) | |
b6a5fc45 | 11552 | return error_mark_node; |
11553 | ||
f1f41a6c | 11554 | first_param = (*params)[0]; |
ec761d5a | 11555 | result = build_function_call_vec (loc, vNULL, new_function, params, |
11556 | NULL); | |
1cd6e20d | 11557 | if (result == error_mark_node) |
11558 | return result; | |
2797f13a | 11559 | if (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N |
1cd6e20d | 11560 | && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N |
11561 | && orig_code != BUILT_IN_ATOMIC_STORE_N) | |
11562 | result = sync_resolve_return (first_param, result, orig_format); | |
b6a5fc45 | 11563 | |
1cd6e20d | 11564 | /* If new_return is set, assign function to that expr and cast the |
11565 | result to void since the generic interface returned void. */ | |
11566 | if (new_return) | |
11567 | { | |
11568 | /* Cast function result from I{1,2,4,8,16} to the required type. */ | |
11569 | result = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (new_return), result); | |
11570 | result = build2 (MODIFY_EXPR, TREE_TYPE (new_return), new_return, | |
11571 | result); | |
11572 | TREE_SIDE_EFFECTS (result) = 1; | |
11573 | protected_set_expr_location (result, loc); | |
11574 | result = convert (void_type_node, result); | |
11575 | } | |
b6a5fc45 | 11576 | return result; |
11577 | } | |
11578 | ||
11579 | default: | |
65441f6f | 11580 | return NULL_TREE; |
b6a5fc45 | 11581 | } |
11582 | } | |
11583 | ||
73437615 | 11584 | /* vector_types_compatible_elements_p is used in type checks of vectors |
11585 | values used as operands of binary operators. Where it returns true, and | |
11586 | the other checks of the caller succeed (being vector types in he first | |
11587 | place, and matching number of elements), we can just treat the types | |
11588 | as essentially the same. | |
11589 | Contrast with vector_targets_convertible_p, which is used for vector | |
11590 | pointer types, and vector_types_convertible_p, which will allow | |
11591 | language-specific matches under the control of flag_lax_vector_conversions, | |
11592 | and might still require a conversion. */ | |
11593 | /* True if vector types T1 and T2 can be inputs to the same binary | |
11594 | operator without conversion. | |
11595 | We don't check the overall vector size here because some of our callers | |
11596 | want to give different error messages when the vectors are compatible | |
11597 | except for the element count. */ | |
11598 | ||
491255f5 | 11599 | bool |
73437615 | 11600 | vector_types_compatible_elements_p (tree t1, tree t2) |
491255f5 | 11601 | { |
73437615 | 11602 | bool opaque = TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2); |
11603 | t1 = TREE_TYPE (t1); | |
11604 | t2 = TREE_TYPE (t2); | |
11605 | ||
491255f5 | 11606 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); |
11607 | ||
9421ebb9 | 11608 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
11609 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
11610 | || c2 == FIXED_POINT_TYPE)); | |
491255f5 | 11611 | |
73437615 | 11612 | t1 = c_common_signed_type (t1); |
11613 | t2 = c_common_signed_type (t2); | |
491255f5 | 11614 | /* Equality works here because c_common_signed_type uses |
11615 | TYPE_MAIN_VARIANT. */ | |
73437615 | 11616 | if (t1 == t2) |
11617 | return true; | |
11618 | if (opaque && c1 == c2 | |
11619 | && (c1 == INTEGER_TYPE || c1 == REAL_TYPE) | |
11620 | && TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
11621 | return true; | |
11622 | return false; | |
491255f5 | 11623 | } |
11624 | ||
be7350e7 | 11625 | /* Check for missing format attributes on function pointers. LTYPE is |
11626 | the new type or left-hand side type. RTYPE is the old type or | |
11627 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
11628 | attribute. */ | |
11629 | ||
11630 | bool | |
11631 | check_missing_format_attribute (tree ltype, tree rtype) | |
11632 | { | |
11633 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
11634 | tree ra; | |
11635 | ||
11636 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
11637 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
11638 | break; | |
11639 | if (ra) | |
11640 | { | |
11641 | tree la; | |
11642 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
11643 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
11644 | break; | |
11645 | return !la; | |
11646 | } | |
11647 | else | |
11648 | return false; | |
11649 | } | |
11650 | ||
2840aae4 | 11651 | /* Subscripting with type char is likely to lose on a machine where |
11652 | chars are signed. So warn on any machine, but optionally. Don't | |
11653 | warn for unsigned char since that type is safe. Don't warn for | |
11654 | signed char because anyone who uses that must have done so | |
11655 | deliberately. Furthermore, we reduce the false positive load by | |
11656 | warning only for non-constant value of type char. */ | |
11657 | ||
11658 | void | |
92b63884 | 11659 | warn_array_subscript_with_type_char (location_t loc, tree index) |
2840aae4 | 11660 | { |
11661 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
11662 | && TREE_CODE (index) != INTEGER_CST) | |
92b63884 | 11663 | warning_at (loc, OPT_Wchar_subscripts, |
11664 | "array subscript has type %<char%>"); | |
2840aae4 | 11665 | } |
11666 | ||
e534436e | 11667 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
11668 | cover cases like x + y << z which readers are likely to | |
11669 | misinterpret. We have seen an expression in which CODE is a binary | |
82012ffe | 11670 | operator used to combine expressions ARG_LEFT and ARG_RIGHT, which |
11671 | before folding had CODE_LEFT and CODE_RIGHT. CODE_LEFT and | |
11672 | CODE_RIGHT may be ERROR_MARK, which means that that side of the | |
11673 | expression was not formed using a binary or unary operator, or it | |
11674 | was enclosed in parentheses. */ | |
e534436e | 11675 | |
11676 | void | |
b0e7825e | 11677 | warn_about_parentheses (location_t loc, enum tree_code code, |
269f7979 | 11678 | enum tree_code code_left, tree arg_left, |
82012ffe | 11679 | enum tree_code code_right, tree arg_right) |
e534436e | 11680 | { |
11681 | if (!warn_parentheses) | |
11682 | return; | |
11683 | ||
82012ffe | 11684 | /* This macro tests that the expression ARG with original tree code |
11685 | CODE appears to be a boolean expression. or the result of folding a | |
11686 | boolean expression. */ | |
11687 | #define APPEARS_TO_BE_BOOLEAN_EXPR_P(CODE, ARG) \ | |
11688 | (truth_value_p (TREE_CODE (ARG)) \ | |
11689 | || TREE_CODE (TREE_TYPE (ARG)) == BOOLEAN_TYPE \ | |
11690 | /* Folding may create 0 or 1 integers from other expressions. */ \ | |
11691 | || ((CODE) != INTEGER_CST \ | |
11692 | && (integer_onep (ARG) || integer_zerop (ARG)))) | |
11693 | ||
48e1416a | 11694 | switch (code) |
e534436e | 11695 | { |
82012ffe | 11696 | case LSHIFT_EXPR: |
b0e7825e | 11697 | if (code_left == PLUS_EXPR) |
11698 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11699 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11700 | else if (code_right == PLUS_EXPR) | |
11701 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11702 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11703 | else if (code_left == MINUS_EXPR) | |
11704 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11705 | "suggest parentheses around %<-%> inside %<<<%>"); | |
11706 | else if (code_right == MINUS_EXPR) | |
11707 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11708 | "suggest parentheses around %<-%> inside %<<<%>"); | |
82012ffe | 11709 | return; |
e534436e | 11710 | |
82012ffe | 11711 | case RSHIFT_EXPR: |
b0e7825e | 11712 | if (code_left == PLUS_EXPR) |
11713 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11714 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11715 | else if (code_right == PLUS_EXPR) | |
11716 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11717 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11718 | else if (code_left == MINUS_EXPR) | |
11719 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11720 | "suggest parentheses around %<-%> inside %<>>%>"); | |
11721 | else if (code_right == MINUS_EXPR) | |
11722 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11723 | "suggest parentheses around %<-%> inside %<>>%>"); | |
82012ffe | 11724 | return; |
e534436e | 11725 | |
82012ffe | 11726 | case TRUTH_ORIF_EXPR: |
b0e7825e | 11727 | if (code_left == TRUTH_ANDIF_EXPR) |
11728 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11729 | "suggest parentheses around %<&&%> within %<||%>"); | |
11730 | else if (code_right == TRUTH_ANDIF_EXPR) | |
11731 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11732 | "suggest parentheses around %<&&%> within %<||%>"); | |
82012ffe | 11733 | return; |
11734 | ||
11735 | case BIT_IOR_EXPR: | |
e534436e | 11736 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR |
b0e7825e | 11737 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11738 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11739 | "suggest parentheses around arithmetic in operand of %<|%>"); | |
11740 | else if (code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
11741 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11742 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11743 | "suggest parentheses around arithmetic in operand of %<|%>"); |
e534436e | 11744 | /* Check cases like x|y==z */ |
b0e7825e | 11745 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11746 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11747 | "suggest parentheses around comparison in operand of %<|%>"); | |
11748 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11749 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11750 | "suggest parentheses around comparison in operand of %<|%>"); |
11751 | /* Check cases like !x | y */ | |
11752 | else if (code_left == TRUTH_NOT_EXPR | |
11753 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
b0e7825e | 11754 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11755 | "suggest parentheses around operand of " | |
11756 | "%<!%> or change %<|%> to %<||%> or %<!%> to %<~%>"); | |
82012ffe | 11757 | return; |
e534436e | 11758 | |
82012ffe | 11759 | case BIT_XOR_EXPR: |
e534436e | 11760 | if (code_left == BIT_AND_EXPR |
b0e7825e | 11761 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11762 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11763 | "suggest parentheses around arithmetic in operand of %<^%>"); | |
11764 | else if (code_right == BIT_AND_EXPR | |
11765 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11766 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11767 | "suggest parentheses around arithmetic in operand of %<^%>"); |
e534436e | 11768 | /* Check cases like x^y==z */ |
b0e7825e | 11769 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11770 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11771 | "suggest parentheses around comparison in operand of %<^%>"); | |
11772 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11773 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11774 | "suggest parentheses around comparison in operand of %<^%>"); |
11775 | return; | |
e534436e | 11776 | |
82012ffe | 11777 | case BIT_AND_EXPR: |
b0e7825e | 11778 | if (code_left == PLUS_EXPR) |
11779 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11780 | "suggest parentheses around %<+%> in operand of %<&%>"); | |
11781 | else if (code_right == PLUS_EXPR) | |
11782 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11783 | "suggest parentheses around %<+%> in operand of %<&%>"); |
b0e7825e | 11784 | else if (code_left == MINUS_EXPR) |
11785 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11786 | "suggest parentheses around %<-%> in operand of %<&%>"); | |
11787 | else if (code_right == MINUS_EXPR) | |
11788 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11789 | "suggest parentheses around %<-%> in operand of %<&%>"); |
e534436e | 11790 | /* Check cases like x&y==z */ |
b0e7825e | 11791 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11792 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11793 | "suggest parentheses around comparison in operand of %<&%>"); | |
11794 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11795 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11796 | "suggest parentheses around comparison in operand of %<&%>"); |
11797 | /* Check cases like !x & y */ | |
11798 | else if (code_left == TRUTH_NOT_EXPR | |
11799 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
b0e7825e | 11800 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11801 | "suggest parentheses around operand of " | |
11802 | "%<!%> or change %<&%> to %<&&%> or %<!%> to %<~%>"); | |
82012ffe | 11803 | return; |
e534436e | 11804 | |
82012ffe | 11805 | case EQ_EXPR: |
b0e7825e | 11806 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11807 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11808 | "suggest parentheses around comparison in operand of %<==%>"); | |
11809 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11810 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11811 | "suggest parentheses around comparison in operand of %<==%>"); |
11812 | return; | |
11813 | case NE_EXPR: | |
b0e7825e | 11814 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11815 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11816 | "suggest parentheses around comparison in operand of %<!=%>"); | |
11817 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11818 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11819 | "suggest parentheses around comparison in operand of %<!=%>"); |
11820 | return; | |
11821 | ||
11822 | default: | |
b0e7825e | 11823 | if (TREE_CODE_CLASS (code) == tcc_comparison) |
11824 | { | |
11825 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
269f7979 | 11826 | && code_left != NE_EXPR && code_left != EQ_EXPR |
11827 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_left))) | |
b0e7825e | 11828 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11829 | "comparisons like %<X<=Y<=Z%> do not " | |
11830 | "have their mathematical meaning"); | |
11831 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison | |
269f7979 | 11832 | && code_right != NE_EXPR && code_right != EQ_EXPR |
b0e7825e | 11833 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_right))) |
11834 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11835 | "comparisons like %<X<=Y<=Z%> do not " | |
11836 | "have their mathematical meaning"); | |
11837 | } | |
82012ffe | 11838 | return; |
6ce0c450 | 11839 | } |
82012ffe | 11840 | #undef NOT_A_BOOLEAN_EXPR_P |
e534436e | 11841 | } |
11842 | ||
92fccaaa | 11843 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
11844 | ||
11845 | void | |
11846 | warn_for_unused_label (tree label) | |
11847 | { | |
11848 | if (!TREE_USED (label)) | |
11849 | { | |
11850 | if (DECL_INITIAL (label)) | |
11851 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
11852 | else | |
11853 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
11854 | } | |
11855 | } | |
2840aae4 | 11856 | |
b6889cb0 | 11857 | /* Warn for division by zero according to the value of DIVISOR. LOC |
11858 | is the location of the division operator. */ | |
f092582b | 11859 | |
11860 | void | |
b6889cb0 | 11861 | warn_for_div_by_zero (location_t loc, tree divisor) |
f092582b | 11862 | { |
9421ebb9 | 11863 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
11864 | about division by zero. Do not issue a warning if DIVISOR has a | |
f092582b | 11865 | floating-point type, since we consider 0.0/0.0 a valid way of |
11866 | generating a NaN. */ | |
48d94ede | 11867 | if (c_inhibit_evaluation_warnings == 0 |
9421ebb9 | 11868 | && (integer_zerop (divisor) || fixed_zerop (divisor))) |
b6889cb0 | 11869 | warning_at (loc, OPT_Wdiv_by_zero, "division by zero"); |
f092582b | 11870 | } |
11871 | ||
13869a99 | 11872 | /* Subroutine of build_binary_op. Give warnings for comparisons |
11873 | between signed and unsigned quantities that may fail. Do the | |
11874 | checking based on the original operand trees ORIG_OP0 and ORIG_OP1, | |
11875 | so that casts will be considered, but default promotions won't | |
8e70fb09 | 11876 | be. |
11877 | ||
11878 | LOCATION is the location of the comparison operator. | |
13869a99 | 11879 | |
11880 | The arguments of this function map directly to local variables | |
11881 | of build_binary_op. */ | |
11882 | ||
48e1416a | 11883 | void |
8e70fb09 | 11884 | warn_for_sign_compare (location_t location, |
48e1416a | 11885 | tree orig_op0, tree orig_op1, |
11886 | tree op0, tree op1, | |
13869a99 | 11887 | tree result_type, enum tree_code resultcode) |
11888 | { | |
11889 | int op0_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op0)); | |
11890 | int op1_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op1)); | |
11891 | int unsignedp0, unsignedp1; | |
48e1416a | 11892 | |
13869a99 | 11893 | /* In C++, check for comparison of different enum types. */ |
11894 | if (c_dialect_cxx() | |
11895 | && TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE | |
11896 | && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE | |
11897 | && TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0)) | |
895b662f | 11898 | != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1))) |
13869a99 | 11899 | { |
8e70fb09 | 11900 | warning_at (location, |
11901 | OPT_Wsign_compare, "comparison between types %qT and %qT", | |
11902 | TREE_TYPE (orig_op0), TREE_TYPE (orig_op1)); | |
13869a99 | 11903 | } |
11904 | ||
11905 | /* Do not warn if the comparison is being done in a signed type, | |
11906 | since the signed type will only be chosen if it can represent | |
11907 | all the values of the unsigned type. */ | |
11908 | if (!TYPE_UNSIGNED (result_type)) | |
11909 | /* OK */; | |
11910 | /* Do not warn if both operands are unsigned. */ | |
11911 | else if (op0_signed == op1_signed) | |
11912 | /* OK */; | |
11913 | else | |
11914 | { | |
895b662f | 11915 | tree sop, uop, base_type; |
13869a99 | 11916 | bool ovf; |
895b662f | 11917 | |
13869a99 | 11918 | if (op0_signed) |
11919 | sop = orig_op0, uop = orig_op1; | |
48e1416a | 11920 | else |
13869a99 | 11921 | sop = orig_op1, uop = orig_op0; |
11922 | ||
48e1416a | 11923 | STRIP_TYPE_NOPS (sop); |
13869a99 | 11924 | STRIP_TYPE_NOPS (uop); |
895b662f | 11925 | base_type = (TREE_CODE (result_type) == COMPLEX_TYPE |
11926 | ? TREE_TYPE (result_type) : result_type); | |
13869a99 | 11927 | |
11928 | /* Do not warn if the signed quantity is an unsuffixed integer | |
11929 | literal (or some static constant expression involving such | |
11930 | literals or a conditional expression involving such literals) | |
11931 | and it is non-negative. */ | |
11932 | if (tree_expr_nonnegative_warnv_p (sop, &ovf)) | |
11933 | /* OK */; | |
11934 | /* Do not warn if the comparison is an equality operation, the | |
11935 | unsigned quantity is an integral constant, and it would fit | |
11936 | in the result if the result were signed. */ | |
11937 | else if (TREE_CODE (uop) == INTEGER_CST | |
11938 | && (resultcode == EQ_EXPR || resultcode == NE_EXPR) | |
895b662f | 11939 | && int_fits_type_p (uop, c_common_signed_type (base_type))) |
13869a99 | 11940 | /* OK */; |
11941 | /* In C, do not warn if the unsigned quantity is an enumeration | |
11942 | constant and its maximum value would fit in the result if the | |
11943 | result were signed. */ | |
11944 | else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST | |
11945 | && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE | |
11946 | && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)), | |
895b662f | 11947 | c_common_signed_type (base_type))) |
13869a99 | 11948 | /* OK */; |
48e1416a | 11949 | else |
8e70fb09 | 11950 | warning_at (location, |
48e1416a | 11951 | OPT_Wsign_compare, |
8e70fb09 | 11952 | "comparison between signed and unsigned integer expressions"); |
13869a99 | 11953 | } |
48e1416a | 11954 | |
13869a99 | 11955 | /* Warn if two unsigned values are being compared in a size larger |
11956 | than their original size, and one (and only one) is the result of | |
11957 | a `~' operator. This comparison will always fail. | |
48e1416a | 11958 | |
13869a99 | 11959 | Also warn if one operand is a constant, and the constant does not |
11960 | have all bits set that are set in the ~ operand when it is | |
11961 | extended. */ | |
11962 | ||
7f506bca | 11963 | op0 = c_common_get_narrower (op0, &unsignedp0); |
11964 | op1 = c_common_get_narrower (op1, &unsignedp1); | |
48e1416a | 11965 | |
13869a99 | 11966 | if ((TREE_CODE (op0) == BIT_NOT_EXPR) |
11967 | ^ (TREE_CODE (op1) == BIT_NOT_EXPR)) | |
11968 | { | |
11969 | if (TREE_CODE (op0) == BIT_NOT_EXPR) | |
7f506bca | 11970 | op0 = c_common_get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); |
13869a99 | 11971 | if (TREE_CODE (op1) == BIT_NOT_EXPR) |
7f506bca | 11972 | op1 = c_common_get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); |
13869a99 | 11973 | |
e913b5cd | 11974 | if (tree_fits_shwi_p (op0) || tree_fits_shwi_p (op1)) |
13869a99 | 11975 | { |
11976 | tree primop; | |
11977 | HOST_WIDE_INT constant, mask; | |
11978 | int unsignedp; | |
11979 | unsigned int bits; | |
48e1416a | 11980 | |
e913b5cd | 11981 | if (tree_fits_shwi_p (op0)) |
13869a99 | 11982 | { |
11983 | primop = op1; | |
11984 | unsignedp = unsignedp1; | |
e913b5cd | 11985 | constant = tree_to_shwi (op0); |
13869a99 | 11986 | } |
11987 | else | |
11988 | { | |
11989 | primop = op0; | |
11990 | unsignedp = unsignedp0; | |
e913b5cd | 11991 | constant = tree_to_shwi (op1); |
13869a99 | 11992 | } |
48e1416a | 11993 | |
13869a99 | 11994 | bits = TYPE_PRECISION (TREE_TYPE (primop)); |
11995 | if (bits < TYPE_PRECISION (result_type) | |
11996 | && bits < HOST_BITS_PER_LONG && unsignedp) | |
11997 | { | |
11998 | mask = (~ (HOST_WIDE_INT) 0) << bits; | |
11999 | if ((mask & constant) != mask) | |
12000 | { | |
12001 | if (constant == 0) | |
76fdceeb | 12002 | warning_at (location, OPT_Wsign_compare, |
12003 | "promoted ~unsigned is always non-zero"); | |
13869a99 | 12004 | else |
48e1416a | 12005 | warning_at (location, OPT_Wsign_compare, |
8e70fb09 | 12006 | "comparison of promoted ~unsigned with constant"); |
13869a99 | 12007 | } |
12008 | } | |
12009 | } | |
12010 | else if (unsignedp0 && unsignedp1 | |
12011 | && (TYPE_PRECISION (TREE_TYPE (op0)) | |
12012 | < TYPE_PRECISION (result_type)) | |
12013 | && (TYPE_PRECISION (TREE_TYPE (op1)) | |
12014 | < TYPE_PRECISION (result_type))) | |
8e70fb09 | 12015 | warning_at (location, OPT_Wsign_compare, |
13869a99 | 12016 | "comparison of promoted ~unsigned with unsigned"); |
12017 | } | |
12018 | } | |
12019 | ||
5ba33bf4 | 12020 | /* RESULT_TYPE is the result of converting TYPE1 and TYPE2 to a common |
12021 | type via c_common_type. If -Wdouble-promotion is in use, and the | |
12022 | conditions for warning have been met, issue a warning. GMSGID is | |
12023 | the warning message. It must have two %T specifiers for the type | |
12024 | that was converted (generally "float") and the type to which it was | |
12025 | converted (generally "double), respectively. LOC is the location | |
12026 | to which the awrning should refer. */ | |
12027 | ||
12028 | void | |
12029 | do_warn_double_promotion (tree result_type, tree type1, tree type2, | |
12030 | const char *gmsgid, location_t loc) | |
12031 | { | |
12032 | tree source_type; | |
12033 | ||
12034 | if (!warn_double_promotion) | |
12035 | return; | |
12036 | /* If the conversion will not occur at run-time, there is no need to | |
12037 | warn about it. */ | |
12038 | if (c_inhibit_evaluation_warnings) | |
12039 | return; | |
12040 | if (TYPE_MAIN_VARIANT (result_type) != double_type_node | |
12041 | && TYPE_MAIN_VARIANT (result_type) != complex_double_type_node) | |
12042 | return; | |
12043 | if (TYPE_MAIN_VARIANT (type1) == float_type_node | |
12044 | || TYPE_MAIN_VARIANT (type1) == complex_float_type_node) | |
12045 | source_type = type1; | |
12046 | else if (TYPE_MAIN_VARIANT (type2) == float_type_node | |
12047 | || TYPE_MAIN_VARIANT (type2) == complex_float_type_node) | |
12048 | source_type = type2; | |
12049 | else | |
12050 | return; | |
12051 | warning_at (loc, OPT_Wdouble_promotion, gmsgid, source_type, result_type); | |
12052 | } | |
12053 | ||
41771881 | 12054 | /* Setup a TYPE_DECL node as a typedef representation. |
12055 | ||
12056 | X is a TYPE_DECL for a typedef statement. Create a brand new | |
12057 | ..._TYPE node (which will be just a variant of the existing | |
12058 | ..._TYPE node with identical properties) and then install X | |
12059 | as the TYPE_NAME of this brand new (duplicate) ..._TYPE node. | |
12060 | ||
12061 | The whole point here is to end up with a situation where each | |
12062 | and every ..._TYPE node the compiler creates will be uniquely | |
12063 | associated with AT MOST one node representing a typedef name. | |
12064 | This way, even though the compiler substitutes corresponding | |
12065 | ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very | |
12066 | early on, later parts of the compiler can always do the reverse | |
12067 | translation and get back the corresponding typedef name. For | |
12068 | example, given: | |
ab2c1de8 | 12069 | |
41771881 | 12070 | typedef struct S MY_TYPE; |
12071 | MY_TYPE object; | |
12072 | ||
12073 | Later parts of the compiler might only know that `object' was of | |
12074 | type `struct S' if it were not for code just below. With this | |
12075 | code however, later parts of the compiler see something like: | |
12076 | ||
12077 | struct S' == struct S | |
12078 | typedef struct S' MY_TYPE; | |
12079 | struct S' object; | |
12080 | ||
12081 | And they can then deduce (from the node for type struct S') that | |
12082 | the original object declaration was: | |
12083 | ||
12084 | MY_TYPE object; | |
12085 | ||
12086 | Being able to do this is important for proper support of protoize, | |
12087 | and also for generating precise symbolic debugging information | |
12088 | which takes full account of the programmer's (typedef) vocabulary. | |
12089 | ||
12090 | Obviously, we don't want to generate a duplicate ..._TYPE node if | |
12091 | the TYPE_DECL node that we are now processing really represents a | |
12092 | standard built-in type. */ | |
12093 | ||
12094 | void | |
12095 | set_underlying_type (tree x) | |
12096 | { | |
12097 | if (x == error_mark_node) | |
12098 | return; | |
12099 | if (DECL_IS_BUILTIN (x)) | |
12100 | { | |
12101 | if (TYPE_NAME (TREE_TYPE (x)) == 0) | |
12102 | TYPE_NAME (TREE_TYPE (x)) = x; | |
12103 | } | |
12104 | else if (TREE_TYPE (x) != error_mark_node | |
12105 | && DECL_ORIGINAL_TYPE (x) == NULL_TREE) | |
12106 | { | |
12107 | tree tt = TREE_TYPE (x); | |
12108 | DECL_ORIGINAL_TYPE (x) = tt; | |
12109 | tt = build_variant_type_copy (tt); | |
12110 | TYPE_STUB_DECL (tt) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x)); | |
12111 | TYPE_NAME (tt) = x; | |
12112 | TREE_USED (tt) = TREE_USED (x); | |
12113 | TREE_TYPE (x) = tt; | |
12114 | } | |
12115 | } | |
12116 | ||
1a4c44c5 | 12117 | /* Record the types used by the current global variable declaration |
12118 | being parsed, so that we can decide later to emit their debug info. | |
12119 | Those types are in types_used_by_cur_var_decl, and we are going to | |
12120 | store them in the types_used_by_vars_hash hash table. | |
12121 | DECL is the declaration of the global variable that has been parsed. */ | |
12122 | ||
12123 | void | |
12124 | record_types_used_by_current_var_decl (tree decl) | |
12125 | { | |
12126 | gcc_assert (decl && DECL_P (decl) && TREE_STATIC (decl)); | |
12127 | ||
f1f41a6c | 12128 | while (types_used_by_cur_var_decl && !types_used_by_cur_var_decl->is_empty ()) |
1a4c44c5 | 12129 | { |
f1f41a6c | 12130 | tree type = types_used_by_cur_var_decl->pop (); |
aef48c9a | 12131 | types_used_by_var_decl_insert (type, decl); |
1a4c44c5 | 12132 | } |
12133 | } | |
12134 | ||
a4e3ffad | 12135 | /* If DECL is a typedef that is declared in the current function, |
12136 | record it for the purpose of -Wunused-local-typedefs. */ | |
12137 | ||
12138 | void | |
12139 | record_locally_defined_typedef (tree decl) | |
12140 | { | |
12141 | struct c_language_function *l; | |
12142 | ||
12143 | if (!warn_unused_local_typedefs | |
12144 | || cfun == NULL | |
12145 | /* if this is not a locally defined typedef then we are not | |
12146 | interested. */ | |
12147 | || !is_typedef_decl (decl) | |
12148 | || !decl_function_context (decl)) | |
12149 | return; | |
12150 | ||
12151 | l = (struct c_language_function *) cfun->language; | |
f1f41a6c | 12152 | vec_safe_push (l->local_typedefs, decl); |
a4e3ffad | 12153 | } |
12154 | ||
12155 | /* If T is a TYPE_DECL declared locally, mark it as used. */ | |
12156 | ||
12157 | void | |
12158 | maybe_record_typedef_use (tree t) | |
12159 | { | |
12160 | if (!is_typedef_decl (t)) | |
12161 | return; | |
12162 | ||
12163 | TREE_USED (t) = true; | |
12164 | } | |
12165 | ||
12166 | /* Warn if there are some unused locally defined typedefs in the | |
12167 | current function. */ | |
12168 | ||
12169 | void | |
12170 | maybe_warn_unused_local_typedefs (void) | |
12171 | { | |
12172 | int i; | |
12173 | tree decl; | |
12174 | /* The number of times we have emitted -Wunused-local-typedefs | |
12175 | warnings. If this is different from errorcount, that means some | |
12176 | unrelated errors have been issued. In which case, we'll avoid | |
12177 | emitting "unused-local-typedefs" warnings. */ | |
12178 | static int unused_local_typedefs_warn_count; | |
12179 | struct c_language_function *l; | |
12180 | ||
12181 | if (cfun == NULL) | |
12182 | return; | |
12183 | ||
12184 | if ((l = (struct c_language_function *) cfun->language) == NULL) | |
12185 | return; | |
12186 | ||
12187 | if (warn_unused_local_typedefs | |
12188 | && errorcount == unused_local_typedefs_warn_count) | |
12189 | { | |
f1f41a6c | 12190 | FOR_EACH_VEC_SAFE_ELT (l->local_typedefs, i, decl) |
a4e3ffad | 12191 | if (!TREE_USED (decl)) |
12192 | warning_at (DECL_SOURCE_LOCATION (decl), | |
12193 | OPT_Wunused_local_typedefs, | |
12194 | "typedef %qD locally defined but not used", decl); | |
12195 | unused_local_typedefs_warn_count = errorcount; | |
12196 | } | |
12197 | ||
f1f41a6c | 12198 | vec_free (l->local_typedefs); |
a4e3ffad | 12199 | } |
12200 | ||
78bf4156 | 12201 | /* Warn about boolean expression compared with an integer value different |
12202 | from true/false. Warns also e.g. about "(i1 == i2) == 2". | |
12203 | LOC is the location of the comparison, CODE is its code, OP0 and OP1 | |
12204 | are the operands of the comparison. The caller must ensure that | |
12205 | either operand is a boolean expression. */ | |
12206 | ||
12207 | void | |
12208 | maybe_warn_bool_compare (location_t loc, enum tree_code code, tree op0, | |
12209 | tree op1) | |
12210 | { | |
12211 | if (TREE_CODE_CLASS (code) != tcc_comparison) | |
12212 | return; | |
12213 | ||
12214 | tree cst = (TREE_CODE (op0) == INTEGER_CST) | |
12215 | ? op0 : (TREE_CODE (op1) == INTEGER_CST) ? op1 : NULL_TREE; | |
12216 | if (!cst) | |
12217 | return; | |
12218 | ||
12219 | if (!integer_zerop (cst) && !integer_onep (cst)) | |
12220 | { | |
a720ab1c | 12221 | int sign = (TREE_CODE (op0) == INTEGER_CST |
12222 | ? tree_int_cst_sgn (cst) : -tree_int_cst_sgn (cst)); | |
78bf4156 | 12223 | if (code == EQ_EXPR |
12224 | || ((code == GT_EXPR || code == GE_EXPR) && sign < 0) | |
12225 | || ((code == LT_EXPR || code == LE_EXPR) && sign > 0)) | |
12226 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12227 | "with boolean expression is always false", cst); | |
12228 | else | |
12229 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12230 | "with boolean expression is always true", cst); | |
12231 | } | |
a720ab1c | 12232 | else if (integer_zerop (cst) || integer_onep (cst)) |
12233 | { | |
14744a16 | 12234 | /* If the non-constant operand isn't of a boolean type, we |
12235 | don't want to warn here. */ | |
12236 | tree noncst = TREE_CODE (op0) == INTEGER_CST ? op1 : op0; | |
12237 | /* Handle booleans promoted to integers. */ | |
12238 | if (CONVERT_EXPR_P (noncst) | |
12239 | && TREE_TYPE (noncst) == integer_type_node | |
12240 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (noncst, 0))) == BOOLEAN_TYPE) | |
12241 | /* Warn. */; | |
12242 | else if (TREE_CODE (TREE_TYPE (noncst)) != BOOLEAN_TYPE | |
12243 | && !truth_value_p (TREE_CODE (noncst))) | |
12244 | return; | |
a720ab1c | 12245 | /* Do some magic to get the right diagnostics. */ |
12246 | bool flag = TREE_CODE (op0) == INTEGER_CST; | |
12247 | flag = integer_zerop (cst) ? flag : !flag; | |
12248 | if ((code == GE_EXPR && !flag) || (code == LE_EXPR && flag)) | |
12249 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12250 | "with boolean expression is always true", cst); | |
12251 | else if ((code == LT_EXPR && !flag) || (code == GT_EXPR && flag)) | |
12252 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
12253 | "with boolean expression is always false", cst); | |
12254 | } | |
78bf4156 | 12255 | } |
12256 | ||
f352a3fb | 12257 | /* The C and C++ parsers both use vectors to hold function arguments. |
12258 | For efficiency, we keep a cache of unused vectors. This is the | |
12259 | cache. */ | |
12260 | ||
f1f41a6c | 12261 | typedef vec<tree, va_gc> *tree_gc_vec; |
12262 | static GTY((deletable)) vec<tree_gc_vec, va_gc> *tree_vector_cache; | |
f352a3fb | 12263 | |
12264 | /* Return a new vector from the cache. If the cache is empty, | |
12265 | allocate a new vector. These vectors are GC'ed, so it is OK if the | |
12266 | pointer is not released.. */ | |
12267 | ||
f1f41a6c | 12268 | vec<tree, va_gc> * |
f352a3fb | 12269 | make_tree_vector (void) |
12270 | { | |
f1f41a6c | 12271 | if (tree_vector_cache && !tree_vector_cache->is_empty ()) |
12272 | return tree_vector_cache->pop (); | |
f352a3fb | 12273 | else |
12274 | { | |
f1f41a6c | 12275 | /* Passing 0 to vec::alloc returns NULL, and our callers require |
f352a3fb | 12276 | that we always return a non-NULL value. The vector code uses |
12277 | 4 when growing a NULL vector, so we do too. */ | |
f1f41a6c | 12278 | vec<tree, va_gc> *v; |
12279 | vec_alloc (v, 4); | |
12280 | return v; | |
f352a3fb | 12281 | } |
12282 | } | |
12283 | ||
12284 | /* Release a vector of trees back to the cache. */ | |
12285 | ||
12286 | void | |
f1f41a6c | 12287 | release_tree_vector (vec<tree, va_gc> *vec) |
f352a3fb | 12288 | { |
12289 | if (vec != NULL) | |
12290 | { | |
f1f41a6c | 12291 | vec->truncate (0); |
12292 | vec_safe_push (tree_vector_cache, vec); | |
f352a3fb | 12293 | } |
12294 | } | |
12295 | ||
12296 | /* Get a new tree vector holding a single tree. */ | |
12297 | ||
f1f41a6c | 12298 | vec<tree, va_gc> * |
f352a3fb | 12299 | make_tree_vector_single (tree t) |
12300 | { | |
f1f41a6c | 12301 | vec<tree, va_gc> *ret = make_tree_vector (); |
12302 | ret->quick_push (t); | |
f352a3fb | 12303 | return ret; |
12304 | } | |
12305 | ||
c66c81be | 12306 | /* Get a new tree vector of the TREE_VALUEs of a TREE_LIST chain. */ |
12307 | ||
f1f41a6c | 12308 | vec<tree, va_gc> * |
c66c81be | 12309 | make_tree_vector_from_list (tree list) |
12310 | { | |
f1f41a6c | 12311 | vec<tree, va_gc> *ret = make_tree_vector (); |
c66c81be | 12312 | for (; list; list = TREE_CHAIN (list)) |
f1f41a6c | 12313 | vec_safe_push (ret, TREE_VALUE (list)); |
c66c81be | 12314 | return ret; |
12315 | } | |
12316 | ||
f352a3fb | 12317 | /* Get a new tree vector which is a copy of an existing one. */ |
12318 | ||
f1f41a6c | 12319 | vec<tree, va_gc> * |
12320 | make_tree_vector_copy (const vec<tree, va_gc> *orig) | |
f352a3fb | 12321 | { |
f1f41a6c | 12322 | vec<tree, va_gc> *ret; |
f352a3fb | 12323 | unsigned int ix; |
12324 | tree t; | |
12325 | ||
12326 | ret = make_tree_vector (); | |
f1f41a6c | 12327 | vec_safe_reserve (ret, vec_safe_length (orig)); |
12328 | FOR_EACH_VEC_SAFE_ELT (orig, ix, t) | |
12329 | ret->quick_push (t); | |
f352a3fb | 12330 | return ret; |
12331 | } | |
12332 | ||
a9ffdd35 | 12333 | /* Return true if KEYWORD starts a type specifier. */ |
12334 | ||
12335 | bool | |
12336 | keyword_begins_type_specifier (enum rid keyword) | |
12337 | { | |
12338 | switch (keyword) | |
12339 | { | |
4fba5eb9 | 12340 | case RID_AUTO_TYPE: |
a9ffdd35 | 12341 | case RID_INT: |
12342 | case RID_CHAR: | |
12343 | case RID_FLOAT: | |
12344 | case RID_DOUBLE: | |
12345 | case RID_VOID: | |
a9ffdd35 | 12346 | case RID_UNSIGNED: |
12347 | case RID_LONG: | |
12348 | case RID_SHORT: | |
12349 | case RID_SIGNED: | |
12350 | case RID_DFLOAT32: | |
12351 | case RID_DFLOAT64: | |
12352 | case RID_DFLOAT128: | |
12353 | case RID_FRACT: | |
12354 | case RID_ACCUM: | |
12355 | case RID_BOOL: | |
12356 | case RID_WCHAR: | |
12357 | case RID_CHAR16: | |
12358 | case RID_CHAR32: | |
12359 | case RID_SAT: | |
12360 | case RID_COMPLEX: | |
12361 | case RID_TYPEOF: | |
12362 | case RID_STRUCT: | |
12363 | case RID_CLASS: | |
12364 | case RID_UNION: | |
12365 | case RID_ENUM: | |
12366 | return true; | |
12367 | default: | |
9f75f026 | 12368 | if (keyword >= RID_FIRST_INT_N |
12369 | && keyword < RID_FIRST_INT_N + NUM_INT_N_ENTS | |
12370 | && int_n_enabled_p[keyword-RID_FIRST_INT_N]) | |
12371 | return true; | |
a9ffdd35 | 12372 | return false; |
12373 | } | |
12374 | } | |
12375 | ||
12376 | /* Return true if KEYWORD names a type qualifier. */ | |
12377 | ||
12378 | bool | |
12379 | keyword_is_type_qualifier (enum rid keyword) | |
12380 | { | |
12381 | switch (keyword) | |
12382 | { | |
12383 | case RID_CONST: | |
12384 | case RID_VOLATILE: | |
12385 | case RID_RESTRICT: | |
b560fabd | 12386 | case RID_ATOMIC: |
a9ffdd35 | 12387 | return true; |
12388 | default: | |
12389 | return false; | |
12390 | } | |
12391 | } | |
12392 | ||
12393 | /* Return true if KEYWORD names a storage class specifier. | |
12394 | ||
12395 | RID_TYPEDEF is not included in this list despite `typedef' being | |
12396 | listed in C99 6.7.1.1. 6.7.1.3 indicates that `typedef' is listed as | |
12397 | such for syntactic convenience only. */ | |
12398 | ||
12399 | bool | |
12400 | keyword_is_storage_class_specifier (enum rid keyword) | |
12401 | { | |
12402 | switch (keyword) | |
12403 | { | |
12404 | case RID_STATIC: | |
12405 | case RID_EXTERN: | |
12406 | case RID_REGISTER: | |
12407 | case RID_AUTO: | |
12408 | case RID_MUTABLE: | |
12409 | case RID_THREAD: | |
12410 | return true; | |
12411 | default: | |
12412 | return false; | |
12413 | } | |
12414 | } | |
12415 | ||
fad3f658 | 12416 | /* Return true if KEYWORD names a function-specifier [dcl.fct.spec]. */ |
12417 | ||
12418 | static bool | |
12419 | keyword_is_function_specifier (enum rid keyword) | |
12420 | { | |
12421 | switch (keyword) | |
12422 | { | |
12423 | case RID_INLINE: | |
985c6e3a | 12424 | case RID_NORETURN: |
fad3f658 | 12425 | case RID_VIRTUAL: |
12426 | case RID_EXPLICIT: | |
12427 | return true; | |
12428 | default: | |
12429 | return false; | |
12430 | } | |
12431 | } | |
12432 | ||
12433 | /* Return true if KEYWORD names a decl-specifier [dcl.spec] or a | |
12434 | declaration-specifier (C99 6.7). */ | |
12435 | ||
12436 | bool | |
12437 | keyword_is_decl_specifier (enum rid keyword) | |
12438 | { | |
12439 | if (keyword_is_storage_class_specifier (keyword) | |
12440 | || keyword_is_type_qualifier (keyword) | |
12441 | || keyword_is_function_specifier (keyword)) | |
12442 | return true; | |
12443 | ||
12444 | switch (keyword) | |
12445 | { | |
12446 | case RID_TYPEDEF: | |
12447 | case RID_FRIEND: | |
12448 | case RID_CONSTEXPR: | |
12449 | return true; | |
12450 | default: | |
12451 | return false; | |
12452 | } | |
12453 | } | |
12454 | ||
9b88d08d | 12455 | /* Initialize language-specific-bits of tree_contains_struct. */ |
12456 | ||
12457 | void | |
12458 | c_common_init_ts (void) | |
12459 | { | |
12460 | MARK_TS_TYPED (C_MAYBE_CONST_EXPR); | |
12461 | MARK_TS_TYPED (EXCESS_PRECISION_EXPR); | |
3c6d4197 | 12462 | MARK_TS_TYPED (ARRAY_NOTATION_REF); |
9b88d08d | 12463 | } |
12464 | ||
244db24d | 12465 | /* Build a user-defined numeric literal out of an integer constant type VALUE |
12466 | with identifier SUFFIX. */ | |
12467 | ||
12468 | tree | |
324ca377 | 12469 | build_userdef_literal (tree suffix_id, tree value, |
12470 | enum overflow_type overflow, tree num_string) | |
244db24d | 12471 | { |
12472 | tree literal = make_node (USERDEF_LITERAL); | |
12473 | USERDEF_LITERAL_SUFFIX_ID (literal) = suffix_id; | |
12474 | USERDEF_LITERAL_VALUE (literal) = value; | |
324ca377 | 12475 | USERDEF_LITERAL_OVERFLOW (literal) = overflow; |
244db24d | 12476 | USERDEF_LITERAL_NUM_STRING (literal) = num_string; |
12477 | return literal; | |
12478 | } | |
12479 | ||
7059d45d | 12480 | /* For vector[index], convert the vector to a |
c61ef207 | 12481 | pointer of the underlying type. Return true if the resulting |
12482 | ARRAY_REF should not be an lvalue. */ | |
12483 | ||
12484 | bool | |
7059d45d | 12485 | convert_vector_to_pointer_for_subscript (location_t loc, |
c61ef207 | 12486 | tree *vecp, tree index) |
7059d45d | 12487 | { |
c61ef207 | 12488 | bool ret = false; |
7059d45d | 12489 | if (TREE_CODE (TREE_TYPE (*vecp)) == VECTOR_TYPE) |
12490 | { | |
12491 | tree type = TREE_TYPE (*vecp); | |
12492 | tree type1; | |
12493 | ||
c61ef207 | 12494 | ret = !lvalue_p (*vecp); |
7059d45d | 12495 | if (TREE_CODE (index) == INTEGER_CST) |
e913b5cd | 12496 | if (!tree_fits_uhwi_p (index) |
aa59f000 | 12497 | || tree_to_uhwi (index) >= TYPE_VECTOR_SUBPARTS (type)) |
7059d45d | 12498 | warning_at (loc, OPT_Warray_bounds, "index value is out of bound"); |
12499 | ||
c61ef207 | 12500 | if (ret) |
12501 | { | |
f9e245b2 | 12502 | tree tmp = create_tmp_var_raw (type); |
c61ef207 | 12503 | DECL_SOURCE_LOCATION (tmp) = loc; |
12504 | *vecp = c_save_expr (*vecp); | |
12505 | if (TREE_CODE (*vecp) == C_MAYBE_CONST_EXPR) | |
12506 | { | |
12507 | bool non_const = C_MAYBE_CONST_EXPR_NON_CONST (*vecp); | |
12508 | *vecp = C_MAYBE_CONST_EXPR_EXPR (*vecp); | |
12509 | *vecp | |
12510 | = c_wrap_maybe_const (build4 (TARGET_EXPR, type, tmp, | |
12511 | *vecp, NULL_TREE, NULL_TREE), | |
12512 | non_const); | |
12513 | } | |
12514 | else | |
12515 | *vecp = build4 (TARGET_EXPR, type, tmp, *vecp, | |
12516 | NULL_TREE, NULL_TREE); | |
12517 | SET_EXPR_LOCATION (*vecp, loc); | |
12518 | c_common_mark_addressable_vec (tmp); | |
12519 | } | |
12520 | else | |
12521 | c_common_mark_addressable_vec (*vecp); | |
7059d45d | 12522 | type = build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type)); |
7059d45d | 12523 | type1 = build_pointer_type (TREE_TYPE (*vecp)); |
b2ca6510 | 12524 | bool ref_all = TYPE_REF_CAN_ALIAS_ALL (type1); |
12525 | if (!ref_all | |
12526 | && !DECL_P (*vecp)) | |
12527 | { | |
12528 | /* If the original vector isn't declared may_alias and it | |
12529 | isn't a bare vector look if the subscripting would | |
12530 | alias the vector we subscript, and if not, force ref-all. */ | |
12531 | alias_set_type vecset = get_alias_set (*vecp); | |
12532 | alias_set_type sset = get_alias_set (type); | |
12533 | if (!alias_sets_must_conflict_p (sset, vecset) | |
12534 | && !alias_set_subset_of (sset, vecset)) | |
12535 | ref_all = true; | |
12536 | } | |
12537 | type = build_pointer_type_for_mode (type, ptr_mode, ref_all); | |
7059d45d | 12538 | *vecp = build1 (ADDR_EXPR, type1, *vecp); |
12539 | *vecp = convert (type, *vecp); | |
12540 | } | |
c61ef207 | 12541 | return ret; |
7059d45d | 12542 | } |
12543 | ||
41ed701a | 12544 | /* Determine which of the operands, if any, is a scalar that needs to be |
12545 | converted to a vector, for the range of operations. */ | |
12546 | enum stv_conv | |
12547 | scalar_to_vector (location_t loc, enum tree_code code, tree op0, tree op1, | |
12548 | bool complain) | |
12549 | { | |
12550 | tree type0 = TREE_TYPE (op0); | |
12551 | tree type1 = TREE_TYPE (op1); | |
12552 | bool integer_only_op = false; | |
12553 | enum stv_conv ret = stv_firstarg; | |
12554 | ||
12555 | gcc_assert (TREE_CODE (type0) == VECTOR_TYPE | |
12556 | || TREE_CODE (type1) == VECTOR_TYPE); | |
12557 | switch (code) | |
12558 | { | |
12559 | /* Most GENERIC binary expressions require homogeneous arguments. | |
12560 | LSHIFT_EXPR and RSHIFT_EXPR are exceptions and accept a first | |
12561 | argument that is a vector and a second one that is a scalar, so | |
12562 | we never return stv_secondarg for them. */ | |
12563 | case RSHIFT_EXPR: | |
12564 | case LSHIFT_EXPR: | |
12565 | if (TREE_CODE (type0) == INTEGER_TYPE | |
12566 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
12567 | { | |
22a75734 | 12568 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 12569 | { |
12570 | if (complain) | |
12571 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12572 | "involves truncation", type0, type1); | |
12573 | return stv_error; | |
12574 | } | |
12575 | else | |
12576 | return stv_firstarg; | |
12577 | } | |
12578 | break; | |
12579 | ||
12580 | case BIT_IOR_EXPR: | |
12581 | case BIT_XOR_EXPR: | |
12582 | case BIT_AND_EXPR: | |
12583 | integer_only_op = true; | |
12584 | /* ... fall through ... */ | |
12585 | ||
7b463b19 | 12586 | case VEC_COND_EXPR: |
12587 | ||
41ed701a | 12588 | case PLUS_EXPR: |
12589 | case MINUS_EXPR: | |
12590 | case MULT_EXPR: | |
12591 | case TRUNC_DIV_EXPR: | |
12592 | case CEIL_DIV_EXPR: | |
12593 | case FLOOR_DIV_EXPR: | |
12594 | case ROUND_DIV_EXPR: | |
12595 | case EXACT_DIV_EXPR: | |
12596 | case TRUNC_MOD_EXPR: | |
12597 | case FLOOR_MOD_EXPR: | |
12598 | case RDIV_EXPR: | |
12599 | case EQ_EXPR: | |
12600 | case NE_EXPR: | |
12601 | case LE_EXPR: | |
12602 | case GE_EXPR: | |
12603 | case LT_EXPR: | |
12604 | case GT_EXPR: | |
12605 | /* What about UNLT_EXPR? */ | |
12606 | if (TREE_CODE (type0) == VECTOR_TYPE) | |
12607 | { | |
12608 | tree tmp; | |
12609 | ret = stv_secondarg; | |
12610 | /* Swap TYPE0 with TYPE1 and OP0 with OP1 */ | |
12611 | tmp = type0; type0 = type1; type1 = tmp; | |
12612 | tmp = op0; op0 = op1; op1 = tmp; | |
12613 | } | |
12614 | ||
12615 | if (TREE_CODE (type0) == INTEGER_TYPE | |
12616 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
12617 | { | |
22a75734 | 12618 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 12619 | { |
12620 | if (complain) | |
12621 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12622 | "involves truncation", type0, type1); | |
12623 | return stv_error; | |
12624 | } | |
12625 | return ret; | |
12626 | } | |
12627 | else if (!integer_only_op | |
12628 | /* Allow integer --> real conversion if safe. */ | |
12629 | && (TREE_CODE (type0) == REAL_TYPE | |
12630 | || TREE_CODE (type0) == INTEGER_TYPE) | |
12631 | && SCALAR_FLOAT_TYPE_P (TREE_TYPE (type1))) | |
12632 | { | |
22a75734 | 12633 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 12634 | { |
12635 | if (complain) | |
12636 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12637 | "involves truncation", type0, type1); | |
12638 | return stv_error; | |
12639 | } | |
12640 | return ret; | |
12641 | } | |
12642 | default: | |
12643 | break; | |
12644 | } | |
12645 | ||
12646 | return stv_nothing; | |
12647 | } | |
12648 | ||
ffcdbf9c | 12649 | /* Return true iff ALIGN is an integral constant that is a fundamental |
12650 | alignment, as defined by [basic.align] in the c++-11 | |
12651 | specifications. | |
12652 | ||
12653 | That is: | |
12654 | ||
12655 | [A fundamental alignment is represented by an alignment less than or | |
12656 | equal to the greatest alignment supported by the implementation | |
12657 | in all contexts, which is equal to | |
12658 | alignof(max_align_t)]. */ | |
12659 | ||
12660 | bool | |
12661 | cxx_fundamental_alignment_p (unsigned align) | |
12662 | { | |
12663 | return (align <= MAX (TYPE_ALIGN (long_long_integer_type_node), | |
12664 | TYPE_ALIGN (long_double_type_node))); | |
12665 | } | |
12666 | ||
46da3601 | 12667 | /* Return true if T is a pointer to a zero-sized aggregate. */ |
12668 | ||
12669 | bool | |
12670 | pointer_to_zero_sized_aggr_p (tree t) | |
12671 | { | |
12672 | if (!POINTER_TYPE_P (t)) | |
12673 | return false; | |
12674 | t = TREE_TYPE (t); | |
12675 | return (TYPE_SIZE (t) && integer_zerop (TYPE_SIZE (t))); | |
12676 | } | |
12677 | ||
7bedc3a0 | 12678 | #include "gt-c-family-c-common.h" |