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b0fc3e72 | 1 | /* Subroutines shared by all languages that are variants of C. |
3aea1f79 | 2 | Copyright (C) 1992-2014 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 | |
20 | #include "config.h" | |
405711de | 21 | #include "system.h" |
805e22b2 | 22 | #include "coretypes.h" |
23 | #include "tm.h" | |
e48d0f41 | 24 | #include "intl.h" |
b0fc3e72 | 25 | #include "tree.h" |
9ed99284 | 26 | #include "fold-const.h" |
27 | #include "stor-layout.h" | |
28 | #include "calls.h" | |
29 | #include "stringpool.h" | |
30 | #include "attribs.h" | |
31 | #include "varasm.h" | |
32 | #include "trans-mem.h" | |
b0fc3e72 | 33 | #include "flags.h" |
a3fa7feb | 34 | #include "c-pragma.h" |
e41f0d80 | 35 | #include "c-common.h" |
6c536c4f | 36 | #include "c-objc.h" |
d8c9779c | 37 | #include "tm_p.h" |
4e91a871 | 38 | #include "obstack.h" |
a654e028 | 39 | #include "cpplib.h" |
8ee295a7 | 40 | #include "target.h" |
218e3e4e | 41 | #include "common/common-target.h" |
96554925 | 42 | #include "langhooks.h" |
f3dde807 | 43 | #include "tree-inline.h" |
69579044 | 44 | #include "toplev.h" |
7f5f3953 | 45 | #include "diagnostic.h" |
4ee9c684 | 46 | #include "tree-iterator.h" |
47 | #include "hashtab.h" | |
e08bd2f4 | 48 | #include "opts.h" |
62eec3b4 | 49 | #include "cgraph.h" |
b9fc964a | 50 | #include "target-def.h" |
a8783bee | 51 | #include "gimplify.h" |
e913b5cd | 52 | #include "wide-int-print.h" |
fd6f6435 | 53 | |
90cc7820 | 54 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
a654e028 | 55 | |
72040e7e | 56 | /* The following symbols are subsumed in the c_global_trees array, and |
44e9fa65 | 57 | listed here individually for documentation purposes. |
72040e7e | 58 | |
59 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
60 | ||
61 | tree short_integer_type_node; | |
62 | tree long_integer_type_node; | |
63 | tree long_long_integer_type_node; | |
6388cfe2 | 64 | tree int128_integer_type_node; |
72040e7e | 65 | |
66 | tree short_unsigned_type_node; | |
67 | tree long_unsigned_type_node; | |
68 | tree long_long_unsigned_type_node; | |
6388cfe2 | 69 | tree int128_unsigned_type_node; |
72040e7e | 70 | |
3c2239cf | 71 | tree truthvalue_type_node; |
72 | tree truthvalue_false_node; | |
73 | tree truthvalue_true_node; | |
72040e7e | 74 | |
75 | tree ptrdiff_type_node; | |
76 | ||
77 | tree unsigned_char_type_node; | |
78 | tree signed_char_type_node; | |
79 | tree wchar_type_node; | |
72040e7e | 80 | |
924bbf02 | 81 | tree char16_type_node; |
82 | tree char32_type_node; | |
83 | ||
72040e7e | 84 | tree float_type_node; |
85 | tree double_type_node; | |
86 | tree long_double_type_node; | |
87 | ||
88 | tree complex_integer_type_node; | |
89 | tree complex_float_type_node; | |
90 | tree complex_double_type_node; | |
91 | tree complex_long_double_type_node; | |
92 | ||
c4503c0a | 93 | tree dfloat32_type_node; |
94 | tree dfloat64_type_node; | |
95 | tree_dfloat128_type_node; | |
96 | ||
72040e7e | 97 | tree intQI_type_node; |
98 | tree intHI_type_node; | |
99 | tree intSI_type_node; | |
100 | tree intDI_type_node; | |
101 | tree intTI_type_node; | |
102 | ||
103 | tree unsigned_intQI_type_node; | |
104 | tree unsigned_intHI_type_node; | |
105 | tree unsigned_intSI_type_node; | |
106 | tree unsigned_intDI_type_node; | |
107 | tree unsigned_intTI_type_node; | |
108 | ||
109 | tree widest_integer_literal_type_node; | |
110 | tree widest_unsigned_literal_type_node; | |
111 | ||
112 | Nodes for types `void *' and `const void *'. | |
113 | ||
114 | tree ptr_type_node, const_ptr_type_node; | |
115 | ||
116 | Nodes for types `char *' and `const char *'. | |
117 | ||
118 | tree string_type_node, const_string_type_node; | |
119 | ||
120 | Type `char[SOMENUMBER]'. | |
121 | Used when an array of char is needed and the size is irrelevant. | |
122 | ||
123 | tree char_array_type_node; | |
124 | ||
72040e7e | 125 | Type `wchar_t[SOMENUMBER]' or something like it. |
126 | Used when a wide string literal is created. | |
127 | ||
128 | tree wchar_array_type_node; | |
129 | ||
924bbf02 | 130 | Type `char16_t[SOMENUMBER]' or something like it. |
131 | Used when a UTF-16 string literal is created. | |
132 | ||
133 | tree char16_array_type_node; | |
134 | ||
135 | Type `char32_t[SOMENUMBER]' or something like it. | |
136 | Used when a UTF-32 string literal is created. | |
137 | ||
138 | tree char32_array_type_node; | |
139 | ||
72040e7e | 140 | Type `int ()' -- used for implicit declaration of functions. |
141 | ||
142 | tree default_function_type; | |
143 | ||
72040e7e | 144 | A VOID_TYPE node, packaged in a TREE_LIST. |
145 | ||
146 | tree void_list_node; | |
147 | ||
734c98be | 148 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
65b7f83f | 149 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
150 | VAR_DECLS, but C++ does.) | |
71d9fc9b | 151 | |
65b7f83f | 152 | tree function_name_decl_node; |
734c98be | 153 | tree pretty_function_name_decl_node; |
65b7f83f | 154 | tree c99_function_name_decl_node; |
155 | ||
156 | Stack of nested function name VAR_DECLs. | |
1cae46be | 157 | |
65b7f83f | 158 | tree saved_function_name_decls; |
71d9fc9b | 159 | |
72040e7e | 160 | */ |
161 | ||
162 | tree c_global_trees[CTI_MAX]; | |
573aba85 | 163 | \f |
574a6990 | 164 | /* Switches common to the C front ends. */ |
165 | ||
f7070933 | 166 | /* Nonzero means don't output line number information. */ |
167 | ||
168 | char flag_no_line_commands; | |
169 | ||
170 | /* Nonzero causes -E output not to be done, but directives such as | |
171 | #define that have side effects are still obeyed. */ | |
172 | ||
173 | char flag_no_output; | |
174 | ||
175 | /* Nonzero means dump macros in some fashion. */ | |
176 | ||
177 | char flag_dump_macros; | |
178 | ||
179 | /* Nonzero means pass #include lines through to the output. */ | |
180 | ||
181 | char flag_dump_includes; | |
182 | ||
d718b525 | 183 | /* Nonzero means process PCH files while preprocessing. */ |
184 | ||
185 | bool flag_pch_preprocess; | |
186 | ||
573aba85 | 187 | /* The file name to which we should write a precompiled header, or |
188 | NULL if no header will be written in this compile. */ | |
189 | ||
190 | const char *pch_file; | |
191 | ||
1ed9d5f5 | 192 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
193 | user's namespace. */ | |
194 | int flag_iso; | |
195 | ||
574a6990 | 196 | /* C/ObjC language option variables. */ |
197 | ||
198 | ||
574a6990 | 199 | /* Nonzero means allow type mismatches in conditional expressions; |
200 | just make their values `void'. */ | |
201 | ||
202 | int flag_cond_mismatch; | |
203 | ||
204 | /* Nonzero means enable C89 Amendment 1 features. */ | |
205 | ||
206 | int flag_isoc94; | |
207 | ||
32074525 | 208 | /* Nonzero means use the ISO C99 (or C11) dialect of C. */ |
574a6990 | 209 | |
210 | int flag_isoc99; | |
211 | ||
32074525 | 212 | /* Nonzero means use the ISO C11 dialect of C. */ |
39012afb | 213 | |
32074525 | 214 | int flag_isoc11; |
39012afb | 215 | |
8b332087 | 216 | /* Nonzero means that we have builtin functions, and main is an int. */ |
574a6990 | 217 | |
218 | int flag_hosted = 1; | |
219 | ||
574a6990 | 220 | |
221 | /* ObjC language option variables. */ | |
222 | ||
223 | ||
574a6990 | 224 | /* Tells the compiler that this is a special run. Do not perform any |
225 | compiling, instead we are to test some platform dependent features | |
226 | and output a C header file with appropriate definitions. */ | |
227 | ||
228 | int print_struct_values; | |
229 | ||
f0b5f617 | 230 | /* Tells the compiler what is the constant string class for ObjC. */ |
574a6990 | 231 | |
232 | const char *constant_string_class_name; | |
233 | ||
574a6990 | 234 | |
235 | /* C++ language option variables. */ | |
236 | ||
237 | ||
574a6990 | 238 | /* Nonzero means generate separate instantiation control files and |
239 | juggle them at link time. */ | |
240 | ||
241 | int flag_use_repository; | |
242 | ||
6dcdb5de | 243 | /* The C++ dialect being used. C++98 is the default. */ |
0fe6eeac | 244 | |
6dcdb5de | 245 | enum cxx_dialect cxx_dialect = cxx98; |
0fe6eeac | 246 | |
9dcd0d49 | 247 | /* Maximum template instantiation depth. This limit exists to limit the |
8ce59854 | 248 | time it takes to notice excessively recursive template instantiations. |
574a6990 | 249 | |
8ce59854 | 250 | The default is lower than the 1024 recommended by the C++0x standard |
251 | because G++ runs out of stack before 1024 with highly recursive template | |
252 | argument deduction substitution (g++.dg/cpp0x/enum11.C). */ | |
253 | ||
254 | int max_tinst_depth = 900; | |
574a6990 | 255 | |
988fc1d1 | 256 | /* The elements of `ridpointers' are identifier nodes for the reserved |
257 | type names and storage classes. It is indexed by a RID_... value. */ | |
258 | tree *ridpointers; | |
259 | ||
e60a6f7b | 260 | tree (*make_fname_decl) (location_t, tree, int); |
9e5a737d | 261 | |
48d94ede | 262 | /* Nonzero means don't warn about problems that occur when the code is |
263 | executed. */ | |
264 | int c_inhibit_evaluation_warnings; | |
e78703c1 | 265 | |
93be21c0 | 266 | /* Whether we are building a boolean conversion inside |
267 | convert_for_assignment, or some other late binary operation. If | |
268 | build_binary_op is called for C (from code shared by C and C++) in | |
269 | this case, then the operands have already been folded and the | |
270 | result will not be folded again, so C_MAYBE_CONST_EXPR should not | |
271 | be generated. */ | |
272 | bool in_late_binary_op; | |
273 | ||
7f5f3953 | 274 | /* Whether lexing has been completed, so subsequent preprocessor |
275 | errors should use the compiler's input_location. */ | |
276 | bool done_lexing = false; | |
277 | ||
2c0e001b | 278 | /* Information about how a function name is generated. */ |
65b7f83f | 279 | struct fname_var_t |
280 | { | |
e99c3a1d | 281 | tree *const decl; /* pointer to the VAR_DECL. */ |
282 | const unsigned rid; /* RID number for the identifier. */ | |
283 | const int pretty; /* How pretty is it? */ | |
65b7f83f | 284 | }; |
285 | ||
2c0e001b | 286 | /* The three ways of getting then name of the current function. */ |
65b7f83f | 287 | |
288 | const struct fname_var_t fname_vars[] = | |
289 | { | |
2c0e001b | 290 | /* C99 compliant __func__, must be first. */ |
65b7f83f | 291 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
2c0e001b | 292 | /* GCC __FUNCTION__ compliant. */ |
65b7f83f | 293 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
2c0e001b | 294 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
65b7f83f | 295 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
296 | {NULL, 0, 0}, | |
297 | }; | |
298 | ||
79396169 | 299 | /* Global visibility options. */ |
300 | struct visibility_flags visibility_options; | |
301 | ||
a75b1c71 | 302 | static tree c_fully_fold_internal (tree expr, bool, bool *, bool *); |
2d2f6a15 | 303 | static tree check_case_value (location_t, tree); |
f61a9bc2 | 304 | static bool check_case_bounds (location_t, tree, tree, tree *, tree *); |
be43ff5a | 305 | |
1cae46be | 306 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
307 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
308 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
309 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
5de92639 | 310 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
311 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
a9196da9 | 312 | static tree handle_no_sanitize_address_attribute (tree *, tree, tree, |
313 | int, bool *); | |
d413ffdd | 314 | static tree handle_no_address_safety_analysis_attribute (tree *, tree, tree, |
315 | int, bool *); | |
05f893e1 | 316 | static tree handle_no_sanitize_undefined_attribute (tree *, tree, tree, int, |
317 | bool *); | |
1cae46be | 318 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
bdb1f0d1 | 319 | static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); |
7bd95dfd | 320 | static tree handle_leaf_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 321 | static tree handle_always_inline_attribute (tree *, tree, tree, int, |
322 | bool *); | |
1b16fc45 | 323 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
324 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0cdd9887 | 325 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
10fc867f | 326 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 327 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
328 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
62eec3b4 | 329 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
330 | bool *); | |
1cae46be | 331 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
332 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
333 | int, bool *); | |
334 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
335 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
336 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
337 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
338 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
339 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
85c0a25c | 340 | static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); |
341 | static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); | |
1cae46be | 342 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); |
f4a30bd7 | 343 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
1cae46be | 344 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
345 | bool *); | |
346 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
347 | bool *); | |
348 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
349 | tree, int, bool *); | |
350 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
26d1c5ff | 351 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 352 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
353 | bool *); | |
354 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
4c0315d0 | 355 | static tree handle_tm_attribute (tree *, tree, tree, int, bool *); |
356 | static tree handle_tm_wrap_attribute (tree *, tree, tree, int, bool *); | |
fc09b200 | 357 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 358 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
359 | bool *); | |
360 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
361 | bool *); | |
362 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
363 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
364 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
8a8cdb8d | 365 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
366 | bool *); | |
bf6c8de0 | 367 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5c26b42 | 368 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
4a29c97c | 369 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
237e78b1 | 370 | static tree handle_alloc_align_attribute (tree *, tree, tree, int, bool *); |
371 | static tree handle_assume_aligned_attribute (tree *, tree, tree, int, bool *); | |
24470055 | 372 | static tree handle_target_attribute (tree *, tree, tree, int, bool *); |
46f8e3b0 | 373 | static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); |
4c0315d0 | 374 | static tree ignore_attribute (tree *, tree, tree, int, bool *); |
48b14f50 | 375 | static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); |
8ce86007 | 376 | static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); |
a96c3cc1 | 377 | static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *); |
d7dcba40 | 378 | static tree handle_returns_nonnull_attribute (tree *, tree, tree, int, bool *); |
bc7bff74 | 379 | static tree handle_omp_declare_simd_attribute (tree *, tree, tree, int, |
380 | bool *); | |
381 | static tree handle_omp_declare_target_attribute (tree *, tree, tree, int, | |
382 | bool *); | |
74691f46 | 383 | static tree handle_designated_init_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 384 | |
d01f58f9 | 385 | static void check_function_nonnull (tree, int, tree *); |
1cae46be | 386 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
387 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
388 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
860251be | 389 | static int resort_field_decl_cmp (const void *, const void *); |
dbf6c367 | 390 | |
5c6e5756 | 391 | /* Reserved words. The third field is a mask: keywords are disabled |
392 | if they match the mask. | |
393 | ||
394 | Masks for languages: | |
395 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
396 | C --std=c99: D_CXXONLY | D_OBJC | |
397 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
398 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
399 | C++ --std=c0x: D_CONLY | D_OBJC | |
400 | ObjC++ is like C++ except that D_OBJC is not set | |
401 | ||
402 | If -fno-asm is used, D_ASM is added to the mask. If | |
403 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
404 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
b27e241e | 405 | In C with -Wc++-compat, we warn if D_CXXWARN is set. |
5c6e5756 | 406 | |
b27e241e | 407 | Note the complication of the D_CXX_OBJC keywords. These are |
408 | reserved words such as 'class'. In C++, 'class' is a reserved | |
409 | word. In Objective-C++ it is too. In Objective-C, it is a | |
410 | reserved word too, but only if it follows an '@' sign. | |
411 | */ | |
5c6e5756 | 412 | const struct c_common_resword c_common_reswords[] = |
413 | { | |
83e25171 | 414 | { "_Alignas", RID_ALIGNAS, D_CONLY }, |
415 | { "_Alignof", RID_ALIGNOF, D_CONLY }, | |
b560fabd | 416 | { "_Atomic", RID_ATOMIC, D_CONLY }, |
5c6e5756 | 417 | { "_Bool", RID_BOOL, D_CONLY }, |
418 | { "_Complex", RID_COMPLEX, 0 }, | |
d037099f | 419 | { "_Cilk_spawn", RID_CILK_SPAWN, 0 }, |
420 | { "_Cilk_sync", RID_CILK_SYNC, 0 }, | |
c1800156 | 421 | { "_Imaginary", RID_IMAGINARY, D_CONLY }, |
5c6e5756 | 422 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, |
423 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
424 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
425 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
426 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
427 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
f80e7755 | 428 | { "_Static_assert", RID_STATIC_ASSERT, D_CONLY }, |
985c6e3a | 429 | { "_Noreturn", RID_NORETURN, D_CONLY }, |
7aa04c8d | 430 | { "_Generic", RID_GENERIC, D_CONLY }, |
d184e0c0 | 431 | { "_Thread_local", RID_THREAD, D_CONLY }, |
5c6e5756 | 432 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, |
433 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
434 | { "__alignof", RID_ALIGNOF, 0 }, | |
435 | { "__alignof__", RID_ALIGNOF, 0 }, | |
436 | { "__asm", RID_ASM, 0 }, | |
437 | { "__asm__", RID_ASM, 0 }, | |
438 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
439 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
4fba5eb9 | 440 | { "__auto_type", RID_AUTO_TYPE, D_CONLY }, |
e6014a82 | 441 | { "__bases", RID_BASES, D_CXXONLY }, |
5c6e5756 | 442 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, |
bff4ad11 | 443 | { "__builtin_complex", RID_BUILTIN_COMPLEX, D_CONLY }, |
bf0cb017 | 444 | { "__builtin_shuffle", RID_BUILTIN_SHUFFLE, 0 }, |
5c6e5756 | 445 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, |
446 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
447 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
448 | { "__complex", RID_COMPLEX, 0 }, | |
449 | { "__complex__", RID_COMPLEX, 0 }, | |
450 | { "__const", RID_CONST, 0 }, | |
451 | { "__const__", RID_CONST, 0 }, | |
452 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
e6014a82 | 453 | { "__direct_bases", RID_DIRECT_BASES, D_CXXONLY }, |
5c6e5756 | 454 | { "__extension__", RID_EXTENSION, 0 }, |
455 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
456 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
457 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
458 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
459 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
460 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
461 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
462 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
463 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
23407dc9 | 464 | { "__imag", RID_IMAGPART, 0 }, |
465 | { "__imag__", RID_IMAGPART, 0 }, | |
466 | { "__inline", RID_INLINE, 0 }, | |
467 | { "__inline__", RID_INLINE, 0 }, | |
6388cfe2 | 468 | { "__int128", RID_INT128, 0 }, |
5c6e5756 | 469 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, |
470 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
471 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
472 | { "__is_convertible_to", RID_IS_CONVERTIBLE_TO, D_CXXONLY }, | |
473 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, | |
474 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
aa4313eb | 475 | { "__is_final", RID_IS_FINAL, D_CXXONLY }, |
23407dc9 | 476 | { "__is_literal_type", RID_IS_LITERAL_TYPE, D_CXXONLY }, |
5c6e5756 | 477 | { "__is_pod", RID_IS_POD, D_CXXONLY }, |
478 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
c1c67b4f | 479 | { "__is_standard_layout", RID_IS_STD_LAYOUT, D_CXXONLY }, |
480 | { "__is_trivial", RID_IS_TRIVIAL, D_CXXONLY }, | |
5c6e5756 | 481 | { "__is_union", RID_IS_UNION, D_CXXONLY }, |
5c6e5756 | 482 | { "__label__", RID_LABEL, 0 }, |
483 | { "__null", RID_NULL, 0 }, | |
484 | { "__real", RID_REALPART, 0 }, | |
485 | { "__real__", RID_REALPART, 0 }, | |
486 | { "__restrict", RID_RESTRICT, 0 }, | |
487 | { "__restrict__", RID_RESTRICT, 0 }, | |
488 | { "__signed", RID_SIGNED, 0 }, | |
489 | { "__signed__", RID_SIGNED, 0 }, | |
490 | { "__thread", RID_THREAD, 0 }, | |
4c0315d0 | 491 | { "__transaction_atomic", RID_TRANSACTION_ATOMIC, 0 }, |
492 | { "__transaction_relaxed", RID_TRANSACTION_RELAXED, 0 }, | |
493 | { "__transaction_cancel", RID_TRANSACTION_CANCEL, 0 }, | |
5c6e5756 | 494 | { "__typeof", RID_TYPEOF, 0 }, |
495 | { "__typeof__", RID_TYPEOF, 0 }, | |
23407dc9 | 496 | { "__underlying_type", RID_UNDERLYING_TYPE, D_CXXONLY }, |
5c6e5756 | 497 | { "__volatile", RID_VOLATILE, 0 }, |
498 | { "__volatile__", RID_VOLATILE, 0 }, | |
ffcdbf9c | 499 | { "alignas", RID_ALIGNAS, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
e463efd7 | 500 | { "alignof", RID_ALIGNOF, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 501 | { "asm", RID_ASM, D_ASM }, |
502 | { "auto", RID_AUTO, 0 }, | |
dbd982c9 | 503 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 504 | { "break", RID_BREAK, 0 }, |
505 | { "case", RID_CASE, 0 }, | |
51030405 | 506 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
5c6e5756 | 507 | { "char", RID_CHAR, 0 }, |
51030405 | 508 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
509 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
510 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 511 | { "const", RID_CONST, 0 }, |
17814aca | 512 | { "constexpr", RID_CONSTEXPR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 513 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, |
514 | { "continue", RID_CONTINUE, 0 }, | |
51030405 | 515 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 516 | { "default", RID_DEFAULT, 0 }, |
51030405 | 517 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 518 | { "do", RID_DO, 0 }, |
519 | { "double", RID_DOUBLE, 0 }, | |
520 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
521 | { "else", RID_ELSE, 0 }, | |
522 | { "enum", RID_ENUM, 0 }, | |
51030405 | 523 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
524 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 525 | { "extern", RID_EXTERN, 0 }, |
51030405 | 526 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 527 | { "float", RID_FLOAT, 0 }, |
528 | { "for", RID_FOR, 0 }, | |
51030405 | 529 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 530 | { "goto", RID_GOTO, 0 }, |
531 | { "if", RID_IF, 0 }, | |
532 | { "inline", RID_INLINE, D_EXT89 }, | |
533 | { "int", RID_INT, 0 }, | |
534 | { "long", RID_LONG, 0 }, | |
535 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
51030405 | 536 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
537 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
98fe9664 | 538 | { "noexcept", RID_NOEXCEPT, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
6fe11077 | 539 | { "nullptr", RID_NULLPTR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
51030405 | 540 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, |
541 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
542 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
543 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 544 | { "register", RID_REGISTER, 0 }, |
545 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
546 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
547 | { "return", RID_RETURN, 0 }, | |
548 | { "short", RID_SHORT, 0 }, | |
549 | { "signed", RID_SIGNED, 0 }, | |
550 | { "sizeof", RID_SIZEOF, 0 }, | |
551 | { "static", RID_STATIC, 0 }, | |
552 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
553 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, | |
554 | { "struct", RID_STRUCT, 0 }, | |
555 | { "switch", RID_SWITCH, 0 }, | |
51030405 | 556 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
557 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
3740094c | 558 | { "thread_local", RID_THREAD, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
51030405 | 559 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, |
560 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
561 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 562 | { "typedef", RID_TYPEDEF, 0 }, |
51030405 | 563 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
564 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 565 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
566 | { "union", RID_UNION, 0 }, | |
567 | { "unsigned", RID_UNSIGNED, 0 }, | |
51030405 | 568 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
569 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 570 | { "void", RID_VOID, 0 }, |
571 | { "volatile", RID_VOLATILE, 0 }, | |
572 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
573 | { "while", RID_WHILE, 0 }, | |
574 | /* These Objective-C keywords are recognized only immediately after | |
575 | an '@'. */ | |
576 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
577 | { "defs", RID_AT_DEFS, D_OBJC }, | |
578 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
579 | { "end", RID_AT_END, D_OBJC }, | |
580 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
581 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
582 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
583 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
584 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
585 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
069761fb | 586 | { "optional", RID_AT_OPTIONAL, D_OBJC }, |
587 | { "required", RID_AT_REQUIRED, D_OBJC }, | |
86c110ac | 588 | { "property", RID_AT_PROPERTY, D_OBJC }, |
4a8875ed | 589 | { "package", RID_AT_PACKAGE, D_OBJC }, |
e1f293c0 | 590 | { "synthesize", RID_AT_SYNTHESIZE, D_OBJC }, |
591 | { "dynamic", RID_AT_DYNAMIC, D_OBJC }, | |
5c6e5756 | 592 | /* These are recognized only in protocol-qualifier context |
593 | (see above) */ | |
594 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
595 | { "byref", RID_BYREF, D_OBJC }, | |
596 | { "in", RID_IN, D_OBJC }, | |
597 | { "inout", RID_INOUT, D_OBJC }, | |
598 | { "oneway", RID_ONEWAY, D_OBJC }, | |
599 | { "out", RID_OUT, D_OBJC }, | |
86c110ac | 600 | /* These are recognized inside a property attribute list */ |
7590f0e5 | 601 | { "assign", RID_ASSIGN, D_OBJC }, |
602 | { "copy", RID_COPY, D_OBJC }, | |
86c110ac | 603 | { "getter", RID_GETTER, D_OBJC }, |
7590f0e5 | 604 | { "nonatomic", RID_NONATOMIC, D_OBJC }, |
605 | { "readonly", RID_READONLY, D_OBJC }, | |
606 | { "readwrite", RID_READWRITE, D_OBJC }, | |
607 | { "retain", RID_RETAIN, D_OBJC }, | |
86c110ac | 608 | { "setter", RID_SETTER, D_OBJC }, |
5c6e5756 | 609 | }; |
610 | ||
611 | const unsigned int num_c_common_reswords = | |
612 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
613 | ||
f8e93a2e | 614 | /* Table of machine-independent attributes common to all C-like languages. */ |
615 | const struct attribute_spec c_common_attribute_table[] = | |
616 | { | |
ac86af5d | 617 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
618 | affects_type_identity } */ | |
f8e93a2e | 619 | { "packed", 0, 0, false, false, false, |
ac86af5d | 620 | handle_packed_attribute , false}, |
f8e93a2e | 621 | { "nocommon", 0, 0, true, false, false, |
ac86af5d | 622 | handle_nocommon_attribute, false}, |
f8e93a2e | 623 | { "common", 0, 0, true, false, false, |
ac86af5d | 624 | handle_common_attribute, false }, |
f8e93a2e | 625 | /* FIXME: logically, noreturn attributes should be listed as |
626 | "false, true, true" and apply to function types. But implementing this | |
627 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
628 | on a decl to identify non-returning functions to be located and fixed | |
629 | to check the function type instead. */ | |
630 | { "noreturn", 0, 0, true, false, false, | |
ac86af5d | 631 | handle_noreturn_attribute, false }, |
f8e93a2e | 632 | { "volatile", 0, 0, true, false, false, |
ac86af5d | 633 | handle_noreturn_attribute, false }, |
f8e93a2e | 634 | { "noinline", 0, 0, true, false, false, |
ac86af5d | 635 | handle_noinline_attribute, false }, |
bdb1f0d1 | 636 | { "noclone", 0, 0, true, false, false, |
ac86af5d | 637 | handle_noclone_attribute, false }, |
7bd95dfd | 638 | { "leaf", 0, 0, true, false, false, |
ac86af5d | 639 | handle_leaf_attribute, false }, |
f8e93a2e | 640 | { "always_inline", 0, 0, true, false, false, |
ac86af5d | 641 | handle_always_inline_attribute, false }, |
541e4101 | 642 | { "gnu_inline", 0, 0, true, false, false, |
ac86af5d | 643 | handle_gnu_inline_attribute, false }, |
1b16fc45 | 644 | { "artificial", 0, 0, true, false, false, |
ac86af5d | 645 | handle_artificial_attribute, false }, |
0cdd9887 | 646 | { "flatten", 0, 0, true, false, false, |
ac86af5d | 647 | handle_flatten_attribute, false }, |
f8e93a2e | 648 | { "used", 0, 0, true, false, false, |
ac86af5d | 649 | handle_used_attribute, false }, |
f8e93a2e | 650 | { "unused", 0, 0, false, false, false, |
ac86af5d | 651 | handle_unused_attribute, false }, |
62eec3b4 | 652 | { "externally_visible", 0, 0, true, false, false, |
ac86af5d | 653 | handle_externally_visible_attribute, false }, |
f8e93a2e | 654 | /* The same comments as for noreturn attributes apply to const ones. */ |
655 | { "const", 0, 0, true, false, false, | |
ac86af5d | 656 | handle_const_attribute, false }, |
f8e93a2e | 657 | { "transparent_union", 0, 0, false, false, false, |
ac86af5d | 658 | handle_transparent_union_attribute, false }, |
9af7fd5b | 659 | { "constructor", 0, 1, true, false, false, |
ac86af5d | 660 | handle_constructor_attribute, false }, |
9af7fd5b | 661 | { "destructor", 0, 1, true, false, false, |
ac86af5d | 662 | handle_destructor_attribute, false }, |
f8e93a2e | 663 | { "mode", 1, 1, false, true, false, |
ac86af5d | 664 | handle_mode_attribute, false }, |
f8e93a2e | 665 | { "section", 1, 1, true, false, false, |
ac86af5d | 666 | handle_section_attribute, false }, |
f8e93a2e | 667 | { "aligned", 0, 1, false, false, false, |
ac86af5d | 668 | handle_aligned_attribute, false }, |
f8e93a2e | 669 | { "weak", 0, 0, true, false, false, |
ac86af5d | 670 | handle_weak_attribute, false }, |
85c0a25c | 671 | { "ifunc", 1, 1, true, false, false, |
ac86af5d | 672 | handle_ifunc_attribute, false }, |
f8e93a2e | 673 | { "alias", 1, 1, true, false, false, |
ac86af5d | 674 | handle_alias_attribute, false }, |
f4a30bd7 | 675 | { "weakref", 0, 1, true, false, false, |
ac86af5d | 676 | handle_weakref_attribute, false }, |
f8e93a2e | 677 | { "no_instrument_function", 0, 0, true, false, false, |
ac86af5d | 678 | handle_no_instrument_function_attribute, |
679 | false }, | |
f8e93a2e | 680 | { "malloc", 0, 0, true, false, false, |
ac86af5d | 681 | handle_malloc_attribute, false }, |
26d1c5ff | 682 | { "returns_twice", 0, 0, true, false, false, |
ac86af5d | 683 | handle_returns_twice_attribute, false }, |
f8e93a2e | 684 | { "no_stack_limit", 0, 0, true, false, false, |
ac86af5d | 685 | handle_no_limit_stack_attribute, false }, |
f8e93a2e | 686 | { "pure", 0, 0, true, false, false, |
ac86af5d | 687 | handle_pure_attribute, false }, |
4c0315d0 | 688 | { "transaction_callable", 0, 0, false, true, false, |
689 | handle_tm_attribute, false }, | |
690 | { "transaction_unsafe", 0, 0, false, true, false, | |
691 | handle_tm_attribute, false }, | |
692 | { "transaction_safe", 0, 0, false, true, false, | |
693 | handle_tm_attribute, false }, | |
694 | { "transaction_may_cancel_outer", 0, 0, false, true, false, | |
695 | handle_tm_attribute, false }, | |
696 | /* ??? These two attributes didn't make the transition from the | |
697 | Intel language document to the multi-vendor language document. */ | |
698 | { "transaction_pure", 0, 0, false, true, false, | |
699 | handle_tm_attribute, false }, | |
700 | { "transaction_wrap", 1, 1, true, false, false, | |
701 | handle_tm_wrap_attribute, false }, | |
fc09b200 | 702 | /* For internal use (marking of builtins) only. The name contains space |
703 | to prevent its usage in source code. */ | |
704 | { "no vops", 0, 0, true, false, false, | |
ac86af5d | 705 | handle_novops_attribute, false }, |
45c4e798 | 706 | { "deprecated", 0, 1, false, false, false, |
ac86af5d | 707 | handle_deprecated_attribute, false }, |
f8e93a2e | 708 | { "vector_size", 1, 1, false, true, false, |
ac86af5d | 709 | handle_vector_size_attribute, false }, |
b212f378 | 710 | { "visibility", 1, 1, false, false, false, |
ac86af5d | 711 | handle_visibility_attribute, false }, |
24dfead4 | 712 | { "tls_model", 1, 1, true, false, false, |
ac86af5d | 713 | handle_tls_model_attribute, false }, |
dbf6c367 | 714 | { "nonnull", 0, -1, false, true, true, |
ac86af5d | 715 | handle_nonnull_attribute, false }, |
fa987697 | 716 | { "nothrow", 0, 0, true, false, false, |
ac86af5d | 717 | handle_nothrow_attribute, false }, |
718 | { "may_alias", 0, 0, false, true, false, NULL, false }, | |
7acb29a3 | 719 | { "cleanup", 1, 1, true, false, false, |
ac86af5d | 720 | handle_cleanup_attribute, false }, |
8a8cdb8d | 721 | { "warn_unused_result", 0, 0, false, true, true, |
ac86af5d | 722 | handle_warn_unused_result_attribute, false }, |
50ca527f | 723 | { "sentinel", 0, 1, false, true, true, |
ac86af5d | 724 | handle_sentinel_attribute, false }, |
b5c26b42 | 725 | /* For internal use (marking of builtins) only. The name contains space |
726 | to prevent its usage in source code. */ | |
727 | { "type generic", 0, 0, false, true, true, | |
ac86af5d | 728 | handle_type_generic_attribute, false }, |
4a29c97c | 729 | { "alloc_size", 1, 2, false, true, true, |
ac86af5d | 730 | handle_alloc_size_attribute, false }, |
5de92639 | 731 | { "cold", 0, 0, true, false, false, |
ac86af5d | 732 | handle_cold_attribute, false }, |
5de92639 | 733 | { "hot", 0, 0, true, false, false, |
ac86af5d | 734 | handle_hot_attribute, false }, |
d413ffdd | 735 | { "no_address_safety_analysis", |
736 | 0, 0, true, false, false, | |
737 | handle_no_address_safety_analysis_attribute, | |
738 | false }, | |
a9196da9 | 739 | { "no_sanitize_address", 0, 0, true, false, false, |
740 | handle_no_sanitize_address_attribute, | |
741 | false }, | |
05f893e1 | 742 | { "no_sanitize_undefined", 0, 0, true, false, false, |
743 | handle_no_sanitize_undefined_attribute, | |
744 | false }, | |
10fc867f | 745 | { "warning", 1, 1, true, false, false, |
ac86af5d | 746 | handle_error_attribute, false }, |
10fc867f | 747 | { "error", 1, 1, true, false, false, |
ac86af5d | 748 | handle_error_attribute, false }, |
24470055 | 749 | { "target", 1, -1, true, false, false, |
ac86af5d | 750 | handle_target_attribute, false }, |
46f8e3b0 | 751 | { "optimize", 1, -1, true, false, false, |
ac86af5d | 752 | handle_optimize_attribute, false }, |
4c0315d0 | 753 | /* For internal use only. The leading '*' both prevents its usage in |
754 | source code and signals that it may be overridden by machine tables. */ | |
755 | { "*tm regparm", 0, 0, false, true, true, | |
756 | ignore_attribute, false }, | |
48b14f50 | 757 | { "no_split_stack", 0, 0, true, false, false, |
ac86af5d | 758 | handle_no_split_stack_attribute, false }, |
8ce86007 | 759 | /* For internal use (marking of builtins and runtime functions) only. |
760 | The name contains space to prevent its usage in source code. */ | |
761 | { "fn spec", 1, 1, false, true, true, | |
ac86af5d | 762 | handle_fnspec_attribute, false }, |
a96c3cc1 | 763 | { "warn_unused", 0, 0, false, false, false, |
764 | handle_warn_unused_attribute, false }, | |
d7dcba40 | 765 | { "returns_nonnull", 0, 0, false, true, true, |
766 | handle_returns_nonnull_attribute, false }, | |
bc7bff74 | 767 | { "omp declare simd", 0, -1, true, false, false, |
768 | handle_omp_declare_simd_attribute, false }, | |
74acc703 | 769 | { "cilk simd function", 0, -1, true, false, false, |
770 | handle_omp_declare_simd_attribute, false }, | |
bc7bff74 | 771 | { "omp declare target", 0, 0, true, false, false, |
772 | handle_omp_declare_target_attribute, false }, | |
237e78b1 | 773 | { "alloc_align", 1, 1, false, true, true, |
774 | handle_alloc_align_attribute, false }, | |
775 | { "assume_aligned", 1, 2, false, true, true, | |
776 | handle_assume_aligned_attribute, false }, | |
74691f46 | 777 | { "designated_init", 0, 0, false, true, false, |
778 | handle_designated_init_attribute, false }, | |
ac86af5d | 779 | { NULL, 0, 0, false, false, false, NULL, false } |
f8e93a2e | 780 | }; |
781 | ||
782 | /* Give the specifications for the format attributes, used by C and all | |
d716ce75 | 783 | descendants. */ |
f8e93a2e | 784 | |
785 | const struct attribute_spec c_common_format_attribute_table[] = | |
786 | { | |
ac86af5d | 787 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
788 | affects_type_identity } */ | |
f8e93a2e | 789 | { "format", 3, 3, false, true, true, |
ac86af5d | 790 | handle_format_attribute, false }, |
f8e93a2e | 791 | { "format_arg", 1, 1, false, true, true, |
ac86af5d | 792 | handle_format_arg_attribute, false }, |
793 | { NULL, 0, 0, false, false, false, NULL, false } | |
f8e93a2e | 794 | }; |
795 | ||
6d5d708e | 796 | /* Return identifier for address space AS. */ |
34208e18 | 797 | |
6d5d708e | 798 | const char * |
799 | c_addr_space_name (addr_space_t as) | |
800 | { | |
34208e18 | 801 | int rid = RID_FIRST_ADDR_SPACE + as; |
802 | gcc_assert (ridpointers [rid]); | |
803 | return IDENTIFIER_POINTER (ridpointers [rid]); | |
6d5d708e | 804 | } |
805 | ||
2c0e001b | 806 | /* Push current bindings for the function name VAR_DECLS. */ |
f4e3c278 | 807 | |
808 | void | |
1cae46be | 809 | start_fname_decls (void) |
f4e3c278 | 810 | { |
65b7f83f | 811 | unsigned ix; |
812 | tree saved = NULL_TREE; | |
1cae46be | 813 | |
65b7f83f | 814 | for (ix = 0; fname_vars[ix].decl; ix++) |
815 | { | |
816 | tree decl = *fname_vars[ix].decl; | |
f4e3c278 | 817 | |
65b7f83f | 818 | if (decl) |
819 | { | |
ceb7b692 | 820 | saved = tree_cons (decl, build_int_cst (integer_type_node, ix), |
821 | saved); | |
65b7f83f | 822 | *fname_vars[ix].decl = NULL_TREE; |
823 | } | |
824 | } | |
825 | if (saved || saved_function_name_decls) | |
826 | /* Normally they'll have been NULL, so only push if we've got a | |
827 | stack, or they are non-NULL. */ | |
828 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
829 | saved_function_name_decls); | |
830 | } | |
831 | ||
2363ef00 | 832 | /* Finish up the current bindings, adding them into the current function's |
833 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
834 | If there is no current function, we must be at file scope and no statements | |
835 | are involved. Pop the previous bindings. */ | |
65b7f83f | 836 | |
837 | void | |
1cae46be | 838 | finish_fname_decls (void) |
65b7f83f | 839 | { |
840 | unsigned ix; | |
2363ef00 | 841 | tree stmts = NULL_TREE; |
65b7f83f | 842 | tree stack = saved_function_name_decls; |
843 | ||
844 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
2363ef00 | 845 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
1cae46be | 846 | |
2363ef00 | 847 | if (stmts) |
65b7f83f | 848 | { |
2363ef00 | 849 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
5c423bd6 | 850 | |
2363ef00 | 851 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
852 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
81010c97 | 853 | |
bc2b76e0 | 854 | append_to_statement_list_force (*bodyp, &stmts); |
2363ef00 | 855 | *bodyp = stmts; |
65b7f83f | 856 | } |
1cae46be | 857 | |
65b7f83f | 858 | for (ix = 0; fname_vars[ix].decl; ix++) |
859 | *fname_vars[ix].decl = NULL_TREE; | |
1cae46be | 860 | |
65b7f83f | 861 | if (stack) |
f4e3c278 | 862 | { |
2c0e001b | 863 | /* We had saved values, restore them. */ |
65b7f83f | 864 | tree saved; |
865 | ||
866 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
867 | { | |
868 | tree decl = TREE_PURPOSE (saved); | |
f9ae6f95 | 869 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); |
1cae46be | 870 | |
65b7f83f | 871 | *fname_vars[ix].decl = decl; |
872 | } | |
873 | stack = TREE_CHAIN (stack); | |
f4e3c278 | 874 | } |
65b7f83f | 875 | saved_function_name_decls = stack; |
876 | } | |
877 | ||
81010c97 | 878 | /* Return the text name of the current function, suitably prettified |
5fc7fa69 | 879 | by PRETTY_P. Return string must be freed by caller. */ |
65b7f83f | 880 | |
881 | const char * | |
1cae46be | 882 | fname_as_string (int pretty_p) |
65b7f83f | 883 | { |
9ad4bb1e | 884 | const char *name = "top level"; |
5fc7fa69 | 885 | char *namep; |
8115b8be | 886 | int vrb = 2, len; |
887 | cpp_string cstr = { 0, 0 }, strname; | |
9ad4bb1e | 888 | |
84166705 | 889 | if (!pretty_p) |
9ad4bb1e | 890 | { |
891 | name = ""; | |
892 | vrb = 0; | |
893 | } | |
894 | ||
895 | if (current_function_decl) | |
dc24ddbd | 896 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
9ad4bb1e | 897 | |
8115b8be | 898 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
5fc7fa69 | 899 | |
8115b8be | 900 | namep = XNEWVEC (char, len); |
901 | snprintf (namep, len, "\"%s\"", name); | |
902 | strname.text = (unsigned char *) namep; | |
903 | strname.len = len - 1; | |
5fc7fa69 | 904 | |
924bbf02 | 905 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
8115b8be | 906 | { |
907 | XDELETEVEC (namep); | |
908 | return (const char *) cstr.text; | |
5fc7fa69 | 909 | } |
5fc7fa69 | 910 | |
911 | return namep; | |
65b7f83f | 912 | } |
913 | ||
65b7f83f | 914 | /* Return the VAR_DECL for a const char array naming the current |
915 | function. If the VAR_DECL has not yet been created, create it | |
916 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
917 | ID is its name (unfortunately C and C++ hold the RID values of | |
918 | keywords in different places, so we can't derive RID from ID in | |
e3b80d49 | 919 | this language independent code. LOC is the location of the |
920 | function. */ | |
65b7f83f | 921 | |
922 | tree | |
e3b80d49 | 923 | fname_decl (location_t loc, unsigned int rid, tree id) |
65b7f83f | 924 | { |
925 | unsigned ix; | |
926 | tree decl = NULL_TREE; | |
927 | ||
928 | for (ix = 0; fname_vars[ix].decl; ix++) | |
929 | if (fname_vars[ix].rid == rid) | |
930 | break; | |
931 | ||
932 | decl = *fname_vars[ix].decl; | |
933 | if (!decl) | |
f4e3c278 | 934 | { |
2222b3c6 | 935 | /* If a tree is built here, it would normally have the lineno of |
936 | the current statement. Later this tree will be moved to the | |
937 | beginning of the function and this line number will be wrong. | |
938 | To avoid this problem set the lineno to 0 here; that prevents | |
7299020b | 939 | it from appearing in the RTL. */ |
2363ef00 | 940 | tree stmts; |
9a6486a6 | 941 | location_t saved_location = input_location; |
9a6486a6 | 942 | input_location = UNKNOWN_LOCATION; |
1cae46be | 943 | |
2363ef00 | 944 | stmts = push_stmt_list (); |
e60a6f7b | 945 | decl = (*make_fname_decl) (loc, id, fname_vars[ix].pretty); |
2363ef00 | 946 | stmts = pop_stmt_list (stmts); |
947 | if (!IS_EMPTY_STMT (stmts)) | |
948 | saved_function_name_decls | |
949 | = tree_cons (decl, stmts, saved_function_name_decls); | |
65b7f83f | 950 | *fname_vars[ix].decl = decl; |
9a6486a6 | 951 | input_location = saved_location; |
f4e3c278 | 952 | } |
65b7f83f | 953 | if (!ix && !current_function_decl) |
e3b80d49 | 954 | pedwarn (loc, 0, "%qD is not defined outside of function scope", decl); |
81010c97 | 955 | |
65b7f83f | 956 | return decl; |
f4e3c278 | 957 | } |
958 | ||
070236f0 | 959 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b0fc3e72 | 960 | |
961 | tree | |
1cae46be | 962 | fix_string_type (tree value) |
b0fc3e72 | 963 | { |
070236f0 | 964 | int length = TREE_STRING_LENGTH (value); |
965 | int nchars; | |
00d26680 | 966 | tree e_type, i_type, a_type; |
967 | ||
73be5127 | 968 | /* Compute the number of elements, for the array type. */ |
924bbf02 | 969 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
970 | { | |
971 | nchars = length; | |
972 | e_type = char_type_node; | |
973 | } | |
974 | else if (TREE_TYPE (value) == char16_array_type_node) | |
975 | { | |
976 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
977 | e_type = char16_type_node; | |
978 | } | |
979 | else if (TREE_TYPE (value) == char32_array_type_node) | |
980 | { | |
981 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
982 | e_type = char32_type_node; | |
983 | } | |
984 | else | |
985 | { | |
986 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
987 | e_type = wchar_type_node; | |
988 | } | |
b0fc3e72 | 989 | |
1d752508 | 990 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
991 | limit in C++98 Annex B is very large (65536) and is not normative, | |
992 | so we do not diagnose it (warn_overlength_strings is forced off | |
993 | in c_common_post_options). */ | |
994 | if (warn_overlength_strings) | |
995 | { | |
996 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
997 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
998 | if (nchars - 1 > nchars_max) | |
999 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
1000 | separate the %d from the 'C'. 'ISO' should not be | |
1001 | translated, but it may be moved after 'C%d' in languages | |
1002 | where modifiers follow nouns. */ | |
21ca8540 | 1003 | pedwarn (input_location, OPT_Woverlength_strings, |
8864917d | 1004 | "string length %qd is greater than the length %qd " |
1d752508 | 1005 | "ISO C%d compilers are required to support", |
1006 | nchars - 1, nchars_max, relevant_std); | |
1007 | } | |
82cfc7f7 | 1008 | |
390be14e | 1009 | /* Create the array type for the string constant. The ISO C++ |
1010 | standard says that a string literal has type `const char[N]' or | |
1011 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
1012 | front-end with -Wwrite-strings. | |
1013 | ??? We should change the type of an expression depending on the | |
1014 | state of a warning flag. We should just be warning -- see how | |
1015 | this is handled in the C++ front-end for the deprecated implicit | |
1016 | conversion from string literals to `char*' or `wchar_t*'. | |
00d26680 | 1017 | |
1018 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
1019 | array type being the unqualified version of that type. | |
1020 | Therefore, if we are constructing an array of const char, we must | |
1021 | construct the matching unqualified array type first. The C front | |
1022 | end does not require this, but it does no harm, so we do it | |
1023 | unconditionally. */ | |
ceb7b692 | 1024 | i_type = build_index_type (size_int (nchars - 1)); |
00d26680 | 1025 | a_type = build_array_type (e_type, i_type); |
390be14e | 1026 | if (c_dialect_cxx() || warn_write_strings) |
aebc8537 | 1027 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
3a10ba35 | 1028 | |
00d26680 | 1029 | TREE_TYPE (value) = a_type; |
b8e3b7ad | 1030 | TREE_CONSTANT (value) = 1; |
a814bad5 | 1031 | TREE_READONLY (value) = 1; |
b0fc3e72 | 1032 | TREE_STATIC (value) = 1; |
1033 | return value; | |
1034 | } | |
1035 | \f | |
fc501191 | 1036 | /* If DISABLE is true, stop issuing warnings. This is used when |
1037 | parsing code that we know will not be executed. This function may | |
1038 | be called multiple times, and works as a stack. */ | |
1039 | ||
1040 | static void | |
1041 | c_disable_warnings (bool disable) | |
1042 | { | |
1043 | if (disable) | |
1044 | { | |
1045 | ++c_inhibit_evaluation_warnings; | |
1046 | fold_defer_overflow_warnings (); | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | /* If ENABLE is true, reenable issuing warnings. */ | |
1051 | ||
1052 | static void | |
1053 | c_enable_warnings (bool enable) | |
1054 | { | |
1055 | if (enable) | |
1056 | { | |
1057 | --c_inhibit_evaluation_warnings; | |
1058 | fold_undefer_and_ignore_overflow_warnings (); | |
1059 | } | |
1060 | } | |
1061 | ||
a75b1c71 | 1062 | /* Fully fold EXPR, an expression that was not folded (beyond integer |
1063 | constant expressions and null pointer constants) when being built | |
1064 | up. If IN_INIT, this is in a static initializer and certain | |
1065 | changes are made to the folding done. Clear *MAYBE_CONST if | |
1066 | MAYBE_CONST is not NULL and EXPR is definitely not a constant | |
1067 | expression because it contains an evaluated operator (in C99) or an | |
1068 | operator outside of sizeof returning an integer constant (in C90) | |
1069 | not permitted in constant expressions, or because it contains an | |
1070 | evaluated arithmetic overflow. (*MAYBE_CONST should typically be | |
1071 | set to true by callers before calling this function.) Return the | |
1072 | folded expression. Function arguments have already been folded | |
1073 | before calling this function, as have the contents of SAVE_EXPR, | |
1074 | TARGET_EXPR, BIND_EXPR, VA_ARG_EXPR, OBJ_TYPE_REF and | |
1075 | C_MAYBE_CONST_EXPR. */ | |
1076 | ||
1077 | tree | |
1078 | c_fully_fold (tree expr, bool in_init, bool *maybe_const) | |
1079 | { | |
1080 | tree ret; | |
c6418a4e | 1081 | tree eptype = NULL_TREE; |
a75b1c71 | 1082 | bool dummy = true; |
1083 | bool maybe_const_itself = true; | |
389dd41b | 1084 | location_t loc = EXPR_LOCATION (expr); |
a75b1c71 | 1085 | |
1086 | /* This function is not relevant to C++ because C++ folds while | |
1087 | parsing, and may need changes to be correct for C++ when C++ | |
1088 | stops folding while parsing. */ | |
1089 | if (c_dialect_cxx ()) | |
1090 | gcc_unreachable (); | |
1091 | ||
1092 | if (!maybe_const) | |
1093 | maybe_const = &dummy; | |
c6418a4e | 1094 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) |
1095 | { | |
1096 | eptype = TREE_TYPE (expr); | |
1097 | expr = TREE_OPERAND (expr, 0); | |
1098 | } | |
a75b1c71 | 1099 | ret = c_fully_fold_internal (expr, in_init, maybe_const, |
1100 | &maybe_const_itself); | |
c6418a4e | 1101 | if (eptype) |
389dd41b | 1102 | ret = fold_convert_loc (loc, eptype, ret); |
a75b1c71 | 1103 | *maybe_const &= maybe_const_itself; |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | /* Internal helper for c_fully_fold. EXPR and IN_INIT are as for | |
1108 | c_fully_fold. *MAYBE_CONST_OPERANDS is cleared because of operands | |
1109 | not permitted, while *MAYBE_CONST_ITSELF is cleared because of | |
1110 | arithmetic overflow (for C90, *MAYBE_CONST_OPERANDS is carried from | |
1111 | both evaluated and unevaluated subexpressions while | |
1112 | *MAYBE_CONST_ITSELF is carried from only evaluated | |
1113 | subexpressions). */ | |
1114 | ||
1115 | static tree | |
1116 | c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands, | |
1117 | bool *maybe_const_itself) | |
1118 | { | |
1119 | tree ret = expr; | |
1120 | enum tree_code code = TREE_CODE (expr); | |
1121 | enum tree_code_class kind = TREE_CODE_CLASS (code); | |
1122 | location_t loc = EXPR_LOCATION (expr); | |
1123 | tree op0, op1, op2, op3; | |
1124 | tree orig_op0, orig_op1, orig_op2; | |
1125 | bool op0_const = true, op1_const = true, op2_const = true; | |
1126 | bool op0_const_self = true, op1_const_self = true, op2_const_self = true; | |
1127 | bool nowarning = TREE_NO_WARNING (expr); | |
fc501191 | 1128 | bool unused_p; |
a75b1c71 | 1129 | |
1130 | /* This function is not relevant to C++ because C++ folds while | |
1131 | parsing, and may need changes to be correct for C++ when C++ | |
1132 | stops folding while parsing. */ | |
1133 | if (c_dialect_cxx ()) | |
1134 | gcc_unreachable (); | |
1135 | ||
1136 | /* Constants, declarations, statements, errors, SAVE_EXPRs and | |
1137 | anything else not counted as an expression cannot usefully be | |
1138 | folded further at this point. */ | |
1139 | if (!IS_EXPR_CODE_CLASS (kind) | |
1140 | || kind == tcc_statement | |
1141 | || code == SAVE_EXPR) | |
1142 | return expr; | |
1143 | ||
1144 | /* Operands of variable-length expressions (function calls) have | |
1145 | already been folded, as have __builtin_* function calls, and such | |
1146 | expressions cannot occur in constant expressions. */ | |
1147 | if (kind == tcc_vl_exp) | |
1148 | { | |
1149 | *maybe_const_operands = false; | |
1150 | ret = fold (expr); | |
1151 | goto out; | |
1152 | } | |
1153 | ||
1154 | if (code == C_MAYBE_CONST_EXPR) | |
1155 | { | |
1156 | tree pre = C_MAYBE_CONST_EXPR_PRE (expr); | |
1157 | tree inner = C_MAYBE_CONST_EXPR_EXPR (expr); | |
1158 | if (C_MAYBE_CONST_EXPR_NON_CONST (expr)) | |
1159 | *maybe_const_operands = false; | |
1160 | if (C_MAYBE_CONST_EXPR_INT_OPERANDS (expr)) | |
1161 | *maybe_const_itself = false; | |
1162 | if (pre && !in_init) | |
1163 | ret = build2 (COMPOUND_EXPR, TREE_TYPE (expr), pre, inner); | |
1164 | else | |
1165 | ret = inner; | |
1166 | goto out; | |
1167 | } | |
1168 | ||
1169 | /* Assignment, increment, decrement, function call and comma | |
1170 | operators, and statement expressions, cannot occur in constant | |
1171 | expressions if evaluated / outside of sizeof. (Function calls | |
1172 | were handled above, though VA_ARG_EXPR is treated like a function | |
1173 | call here, and statement expressions are handled through | |
1174 | C_MAYBE_CONST_EXPR to avoid folding inside them.) */ | |
1175 | switch (code) | |
1176 | { | |
1177 | case MODIFY_EXPR: | |
1178 | case PREDECREMENT_EXPR: | |
1179 | case PREINCREMENT_EXPR: | |
1180 | case POSTDECREMENT_EXPR: | |
1181 | case POSTINCREMENT_EXPR: | |
1182 | case COMPOUND_EXPR: | |
1183 | *maybe_const_operands = false; | |
1184 | break; | |
1185 | ||
1186 | case VA_ARG_EXPR: | |
1187 | case TARGET_EXPR: | |
1188 | case BIND_EXPR: | |
1189 | case OBJ_TYPE_REF: | |
1190 | *maybe_const_operands = false; | |
1191 | ret = fold (expr); | |
1192 | goto out; | |
1193 | ||
1194 | default: | |
1195 | break; | |
1196 | } | |
1197 | ||
1198 | /* Fold individual tree codes as appropriate. */ | |
1199 | switch (code) | |
1200 | { | |
1201 | case COMPOUND_LITERAL_EXPR: | |
1202 | /* Any non-constancy will have been marked in a containing | |
1203 | C_MAYBE_CONST_EXPR; there is no more folding to do here. */ | |
1204 | goto out; | |
1205 | ||
1206 | case COMPONENT_REF: | |
1207 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1208 | op1 = TREE_OPERAND (expr, 1); | |
1209 | op2 = TREE_OPERAND (expr, 2); | |
1210 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1211 | maybe_const_itself); | |
f59e3889 | 1212 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1213 | if (op0 != orig_op0) |
1214 | ret = build3 (COMPONENT_REF, TREE_TYPE (expr), op0, op1, op2); | |
1215 | if (ret != expr) | |
1216 | { | |
1217 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1218 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1219 | } | |
1220 | goto out; | |
1221 | ||
1222 | case ARRAY_REF: | |
1223 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1224 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1225 | op2 = TREE_OPERAND (expr, 2); | |
1226 | op3 = TREE_OPERAND (expr, 3); | |
1227 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1228 | maybe_const_itself); | |
f59e3889 | 1229 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1230 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, |
1231 | maybe_const_itself); | |
f59e3889 | 1232 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1233 | op1 = decl_constant_value_for_optimization (op1); |
1234 | if (op0 != orig_op0 || op1 != orig_op1) | |
1235 | ret = build4 (ARRAY_REF, TREE_TYPE (expr), op0, op1, op2, op3); | |
1236 | if (ret != expr) | |
1237 | { | |
1238 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1239 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1240 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1241 | } | |
1242 | ret = fold (ret); | |
1243 | goto out; | |
1244 | ||
1245 | case COMPOUND_EXPR: | |
1246 | case MODIFY_EXPR: | |
1247 | case PREDECREMENT_EXPR: | |
1248 | case PREINCREMENT_EXPR: | |
1249 | case POSTDECREMENT_EXPR: | |
1250 | case POSTINCREMENT_EXPR: | |
1251 | case PLUS_EXPR: | |
1252 | case MINUS_EXPR: | |
1253 | case MULT_EXPR: | |
1254 | case POINTER_PLUS_EXPR: | |
1255 | case TRUNC_DIV_EXPR: | |
1256 | case CEIL_DIV_EXPR: | |
1257 | case FLOOR_DIV_EXPR: | |
1258 | case TRUNC_MOD_EXPR: | |
1259 | case RDIV_EXPR: | |
1260 | case EXACT_DIV_EXPR: | |
1261 | case LSHIFT_EXPR: | |
1262 | case RSHIFT_EXPR: | |
1263 | case BIT_IOR_EXPR: | |
1264 | case BIT_XOR_EXPR: | |
1265 | case BIT_AND_EXPR: | |
1266 | case LT_EXPR: | |
1267 | case LE_EXPR: | |
1268 | case GT_EXPR: | |
1269 | case GE_EXPR: | |
1270 | case EQ_EXPR: | |
1271 | case NE_EXPR: | |
1272 | case COMPLEX_EXPR: | |
1273 | case TRUTH_AND_EXPR: | |
1274 | case TRUTH_OR_EXPR: | |
1275 | case TRUTH_XOR_EXPR: | |
1276 | case UNORDERED_EXPR: | |
1277 | case ORDERED_EXPR: | |
1278 | case UNLT_EXPR: | |
1279 | case UNLE_EXPR: | |
1280 | case UNGT_EXPR: | |
1281 | case UNGE_EXPR: | |
1282 | case UNEQ_EXPR: | |
1283 | /* Binary operations evaluating both arguments (increment and | |
1284 | decrement are binary internally in GCC). */ | |
1285 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1286 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1287 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1288 | maybe_const_itself); | |
f59e3889 | 1289 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1290 | if (code != MODIFY_EXPR |
1291 | && code != PREDECREMENT_EXPR | |
1292 | && code != PREINCREMENT_EXPR | |
1293 | && code != POSTDECREMENT_EXPR | |
1294 | && code != POSTINCREMENT_EXPR) | |
1295 | op0 = decl_constant_value_for_optimization (op0); | |
1296 | /* The RHS of a MODIFY_EXPR was fully folded when building that | |
1297 | expression for the sake of conversion warnings. */ | |
1298 | if (code != MODIFY_EXPR) | |
1299 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, | |
1300 | maybe_const_itself); | |
f59e3889 | 1301 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1302 | op1 = decl_constant_value_for_optimization (op1); |
1303 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) | |
1304 | ret = in_init | |
389dd41b | 1305 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1306 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1307 | else |
1308 | ret = fold (expr); | |
672d914b | 1309 | if (TREE_OVERFLOW_P (ret) |
1310 | && !TREE_OVERFLOW_P (op0) | |
1311 | && !TREE_OVERFLOW_P (op1)) | |
1312 | overflow_warning (EXPR_LOCATION (expr), ret); | |
7c834436 | 1313 | if ((code == LSHIFT_EXPR || code == RSHIFT_EXPR) |
1314 | && TREE_CODE (orig_op1) != INTEGER_CST | |
1315 | && TREE_CODE (op1) == INTEGER_CST | |
1316 | && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE | |
1317 | || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE) | |
1318 | && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE | |
1319 | && c_inhibit_evaluation_warnings == 0) | |
1320 | { | |
1321 | if (tree_int_cst_sgn (op1) < 0) | |
1322 | warning_at (loc, 0, (code == LSHIFT_EXPR | |
1323 | ? G_("left shift count is negative") | |
1324 | : G_("right shift count is negative"))); | |
1325 | else if (compare_tree_int (op1, | |
1326 | TYPE_PRECISION (TREE_TYPE (orig_op0))) | |
1327 | >= 0) | |
1328 | warning_at (loc, 0, (code == LSHIFT_EXPR | |
1329 | ? G_("left shift count >= width of type") | |
1330 | : G_("right shift count >= width of type"))); | |
1331 | } | |
a75b1c71 | 1332 | goto out; |
1333 | ||
1334 | case INDIRECT_REF: | |
1335 | case FIX_TRUNC_EXPR: | |
1336 | case FLOAT_EXPR: | |
1337 | CASE_CONVERT: | |
e66325ea | 1338 | case ADDR_SPACE_CONVERT_EXPR: |
2b19dfe4 | 1339 | case VIEW_CONVERT_EXPR: |
a75b1c71 | 1340 | case NON_LVALUE_EXPR: |
1341 | case NEGATE_EXPR: | |
1342 | case BIT_NOT_EXPR: | |
1343 | case TRUTH_NOT_EXPR: | |
1344 | case ADDR_EXPR: | |
1345 | case CONJ_EXPR: | |
1346 | case REALPART_EXPR: | |
1347 | case IMAGPART_EXPR: | |
1348 | /* Unary operations. */ | |
1349 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1350 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1351 | maybe_const_itself); | |
f59e3889 | 1352 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1353 | if (code != ADDR_EXPR && code != REALPART_EXPR && code != IMAGPART_EXPR) |
1354 | op0 = decl_constant_value_for_optimization (op0); | |
737a23cc | 1355 | /* ??? Cope with user tricks that amount to offsetof. The middle-end is |
1356 | not prepared to deal with them if they occur in initializers. */ | |
1357 | if (op0 != orig_op0 | |
1358 | && code == ADDR_EXPR | |
1359 | && (op1 = get_base_address (op0)) != NULL_TREE | |
1360 | && TREE_CODE (op1) == INDIRECT_REF | |
1361 | && TREE_CONSTANT (TREE_OPERAND (op1, 0))) | |
7549df0d | 1362 | ret = fold_convert_loc (loc, TREE_TYPE (expr), fold_offsetof_1 (op0)); |
737a23cc | 1363 | else if (op0 != orig_op0 || in_init) |
a75b1c71 | 1364 | ret = in_init |
389dd41b | 1365 | ? fold_build1_initializer_loc (loc, code, TREE_TYPE (expr), op0) |
1366 | : fold_build1_loc (loc, code, TREE_TYPE (expr), op0); | |
a75b1c71 | 1367 | else |
1368 | ret = fold (expr); | |
1369 | if (code == INDIRECT_REF | |
1370 | && ret != expr | |
1371 | && TREE_CODE (ret) == INDIRECT_REF) | |
1372 | { | |
1373 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1374 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1375 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1376 | } | |
672d914b | 1377 | switch (code) |
1378 | { | |
1379 | case FIX_TRUNC_EXPR: | |
1380 | case FLOAT_EXPR: | |
1381 | CASE_CONVERT: | |
1382 | /* Don't warn about explicit conversions. We will already | |
1383 | have warned about suspect implicit conversions. */ | |
1384 | break; | |
1385 | ||
1386 | default: | |
1387 | if (TREE_OVERFLOW_P (ret) && !TREE_OVERFLOW_P (op0)) | |
1388 | overflow_warning (EXPR_LOCATION (expr), ret); | |
1389 | break; | |
1390 | } | |
a75b1c71 | 1391 | goto out; |
1392 | ||
1393 | case TRUTH_ANDIF_EXPR: | |
1394 | case TRUTH_ORIF_EXPR: | |
1395 | /* Binary operations not necessarily evaluating both | |
1396 | arguments. */ | |
1397 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1398 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1399 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self); | |
f59e3889 | 1400 | STRIP_TYPE_NOPS (op0); |
672d914b | 1401 | |
1402 | unused_p = (op0 == (code == TRUTH_ANDIF_EXPR | |
1403 | ? truthvalue_false_node | |
1404 | : truthvalue_true_node)); | |
fc501191 | 1405 | c_disable_warnings (unused_p); |
a75b1c71 | 1406 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self); |
f59e3889 | 1407 | STRIP_TYPE_NOPS (op1); |
fc501191 | 1408 | c_enable_warnings (unused_p); |
672d914b | 1409 | |
a75b1c71 | 1410 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1411 | ret = in_init | |
389dd41b | 1412 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1413 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1414 | else |
1415 | ret = fold (expr); | |
1416 | *maybe_const_operands &= op0_const; | |
1417 | *maybe_const_itself &= op0_const_self; | |
1418 | if (!(flag_isoc99 | |
1419 | && op0_const | |
1420 | && op0_const_self | |
1421 | && (code == TRUTH_ANDIF_EXPR | |
1422 | ? op0 == truthvalue_false_node | |
1423 | : op0 == truthvalue_true_node))) | |
1424 | *maybe_const_operands &= op1_const; | |
1425 | if (!(op0_const | |
1426 | && op0_const_self | |
1427 | && (code == TRUTH_ANDIF_EXPR | |
1428 | ? op0 == truthvalue_false_node | |
1429 | : op0 == truthvalue_true_node))) | |
1430 | *maybe_const_itself &= op1_const_self; | |
1431 | goto out; | |
1432 | ||
1433 | case COND_EXPR: | |
1434 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1435 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1436 | orig_op2 = op2 = TREE_OPERAND (expr, 2); | |
1437 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self); | |
672d914b | 1438 | |
f59e3889 | 1439 | STRIP_TYPE_NOPS (op0); |
fc501191 | 1440 | c_disable_warnings (op0 == truthvalue_false_node); |
a75b1c71 | 1441 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self); |
f59e3889 | 1442 | STRIP_TYPE_NOPS (op1); |
fc501191 | 1443 | c_enable_warnings (op0 == truthvalue_false_node); |
672d914b | 1444 | |
fc501191 | 1445 | c_disable_warnings (op0 == truthvalue_true_node); |
a75b1c71 | 1446 | op2 = c_fully_fold_internal (op2, in_init, &op2_const, &op2_const_self); |
f59e3889 | 1447 | STRIP_TYPE_NOPS (op2); |
fc501191 | 1448 | c_enable_warnings (op0 == truthvalue_true_node); |
672d914b | 1449 | |
a75b1c71 | 1450 | if (op0 != orig_op0 || op1 != orig_op1 || op2 != orig_op2) |
389dd41b | 1451 | ret = fold_build3_loc (loc, code, TREE_TYPE (expr), op0, op1, op2); |
a75b1c71 | 1452 | else |
1453 | ret = fold (expr); | |
1454 | *maybe_const_operands &= op0_const; | |
1455 | *maybe_const_itself &= op0_const_self; | |
1456 | if (!(flag_isoc99 | |
1457 | && op0_const | |
1458 | && op0_const_self | |
1459 | && op0 == truthvalue_false_node)) | |
1460 | *maybe_const_operands &= op1_const; | |
1461 | if (!(op0_const | |
1462 | && op0_const_self | |
1463 | && op0 == truthvalue_false_node)) | |
1464 | *maybe_const_itself &= op1_const_self; | |
1465 | if (!(flag_isoc99 | |
1466 | && op0_const | |
1467 | && op0_const_self | |
1468 | && op0 == truthvalue_true_node)) | |
1469 | *maybe_const_operands &= op2_const; | |
1470 | if (!(op0_const | |
1471 | && op0_const_self | |
1472 | && op0 == truthvalue_true_node)) | |
1473 | *maybe_const_itself &= op2_const_self; | |
1474 | goto out; | |
1475 | ||
c6418a4e | 1476 | case EXCESS_PRECISION_EXPR: |
1477 | /* Each case where an operand with excess precision may be | |
1478 | encountered must remove the EXCESS_PRECISION_EXPR around | |
1479 | inner operands and possibly put one around the whole | |
1480 | expression or possibly convert to the semantic type (which | |
1481 | c_fully_fold does); we cannot tell at this stage which is | |
1482 | appropriate in any particular case. */ | |
1483 | gcc_unreachable (); | |
1484 | ||
a75b1c71 | 1485 | default: |
1486 | /* Various codes may appear through folding built-in functions | |
1487 | and their arguments. */ | |
1488 | goto out; | |
1489 | } | |
1490 | ||
1491 | out: | |
1492 | /* Some folding may introduce NON_LVALUE_EXPRs; all lvalue checks | |
1493 | have been done by this point, so remove them again. */ | |
1494 | nowarning |= TREE_NO_WARNING (ret); | |
1495 | STRIP_TYPE_NOPS (ret); | |
1496 | if (nowarning && !TREE_NO_WARNING (ret)) | |
1497 | { | |
1498 | if (!CAN_HAVE_LOCATION_P (ret)) | |
1499 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
1500 | TREE_NO_WARNING (ret) = 1; | |
1501 | } | |
1502 | if (ret != expr) | |
1503 | protected_set_expr_location (ret, loc); | |
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | /* If not optimizing, EXP is not a VAR_DECL, or EXP has array type, | |
1508 | return EXP. Otherwise, return either EXP or its known constant | |
1509 | value (if it has one), but return EXP if EXP has mode BLKmode. ??? | |
1510 | Is the BLKmode test appropriate? */ | |
1511 | ||
1512 | tree | |
1513 | decl_constant_value_for_optimization (tree exp) | |
1514 | { | |
1515 | tree ret; | |
1516 | ||
1517 | /* This function is only used by C, for c_fully_fold and other | |
1518 | optimization, and may not be correct for C++. */ | |
1519 | if (c_dialect_cxx ()) | |
1520 | gcc_unreachable (); | |
1521 | ||
1522 | if (!optimize | |
1523 | || TREE_CODE (exp) != VAR_DECL | |
1524 | || TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1525 | || DECL_MODE (exp) == BLKmode) | |
1526 | return exp; | |
1527 | ||
1528 | ret = decl_constant_value (exp); | |
1529 | /* Avoid unwanted tree sharing between the initializer and current | |
1530 | function's body where the tree can be modified e.g. by the | |
1531 | gimplifier. */ | |
1532 | if (ret != exp && TREE_STATIC (exp)) | |
1533 | ret = unshare_expr (ret); | |
1534 | return ret; | |
1535 | } | |
1536 | ||
2a1736ed | 1537 | /* Print a warning if a constant expression had overflow in folding. |
1538 | Invoke this function on every expression that the language | |
1539 | requires to be a constant expression. | |
1540 | Note the ANSI C standard says it is erroneous for a | |
1541 | constant expression to overflow. */ | |
b2806639 | 1542 | |
1543 | void | |
1cae46be | 1544 | constant_expression_warning (tree value) |
07317e69 | 1545 | { |
48e1416a | 1546 | if (warn_overflow && pedantic |
07317e69 | 1547 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
1548 | || TREE_CODE (value) == FIXED_CST | |
1549 | || TREE_CODE (value) == VECTOR_CST | |
1550 | || TREE_CODE (value) == COMPLEX_CST) | |
1551 | && TREE_OVERFLOW (value)) | |
21ca8540 | 1552 | pedwarn (input_location, OPT_Woverflow, "overflow in constant expression"); |
07317e69 | 1553 | } |
1554 | ||
1555 | /* The same as above but print an unconditional error. */ | |
1556 | void | |
1557 | constant_expression_error (tree value) | |
b2806639 | 1558 | { |
837e1122 | 1559 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
9421ebb9 | 1560 | || TREE_CODE (value) == FIXED_CST |
886cfd4f | 1561 | || TREE_CODE (value) == VECTOR_CST |
837e1122 | 1562 | || TREE_CODE (value) == COMPLEX_CST) |
07317e69 | 1563 | && TREE_OVERFLOW (value)) |
1564 | error ("overflow in constant expression"); | |
2a1736ed | 1565 | } |
1566 | ||
f170d67f | 1567 | /* Print a warning if an expression had overflow in folding and its |
1568 | operands hadn't. | |
1569 | ||
2a1736ed | 1570 | Invoke this function on every expression that |
1571 | (1) appears in the source code, and | |
f170d67f | 1572 | (2) is a constant expression that overflowed, and |
2a1736ed | 1573 | (3) is not already checked by convert_and_check; |
f170d67f | 1574 | however, do not invoke this function on operands of explicit casts |
1575 | or when the expression is the result of an operator and any operand | |
1576 | already overflowed. */ | |
2a1736ed | 1577 | |
1578 | void | |
e60a6f7b | 1579 | overflow_warning (location_t loc, tree value) |
2a1736ed | 1580 | { |
48d94ede | 1581 | if (c_inhibit_evaluation_warnings != 0) |
1582 | return; | |
f170d67f | 1583 | |
1584 | switch (TREE_CODE (value)) | |
886cfd4f | 1585 | { |
f170d67f | 1586 | case INTEGER_CST: |
e60a6f7b | 1587 | warning_at (loc, OPT_Woverflow, "integer overflow in expression"); |
f170d67f | 1588 | break; |
48e1416a | 1589 | |
f170d67f | 1590 | case REAL_CST: |
e60a6f7b | 1591 | warning_at (loc, OPT_Woverflow, |
1592 | "floating point overflow in expression"); | |
f170d67f | 1593 | break; |
48e1416a | 1594 | |
9421ebb9 | 1595 | case FIXED_CST: |
e60a6f7b | 1596 | warning_at (loc, OPT_Woverflow, "fixed-point overflow in expression"); |
9421ebb9 | 1597 | break; |
1598 | ||
f170d67f | 1599 | case VECTOR_CST: |
e60a6f7b | 1600 | warning_at (loc, OPT_Woverflow, "vector overflow in expression"); |
f170d67f | 1601 | break; |
48e1416a | 1602 | |
f170d67f | 1603 | case COMPLEX_CST: |
1604 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
e60a6f7b | 1605 | warning_at (loc, OPT_Woverflow, |
1606 | "complex integer overflow in expression"); | |
f170d67f | 1607 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) |
e60a6f7b | 1608 | warning_at (loc, OPT_Woverflow, |
1609 | "complex floating point overflow in expression"); | |
f170d67f | 1610 | break; |
1611 | ||
1612 | default: | |
1613 | break; | |
886cfd4f | 1614 | } |
2a1736ed | 1615 | } |
1616 | ||
03033af4 | 1617 | /* Warn about uses of logical || / && operator in a context where it |
1618 | is likely that the bitwise equivalent was intended by the | |
1619 | programmer. We have seen an expression in which CODE is a binary | |
9c20c4fc | 1620 | operator used to combine expressions OP_LEFT and OP_RIGHT, which before folding |
1621 | had CODE_LEFT and CODE_RIGHT, into an expression of type TYPE. */ | |
b13d1547 | 1622 | void |
9c20c4fc | 1623 | warn_logical_operator (location_t location, enum tree_code code, tree type, |
48e1416a | 1624 | enum tree_code code_left, tree op_left, |
03033af4 | 1625 | enum tree_code ARG_UNUSED (code_right), tree op_right) |
b13d1547 | 1626 | { |
9c20c4fc | 1627 | int or_op = (code == TRUTH_ORIF_EXPR || code == TRUTH_OR_EXPR); |
1628 | int in0_p, in1_p, in_p; | |
1629 | tree low0, low1, low, high0, high1, high, lhs, rhs, tem; | |
1630 | bool strict_overflow_p = false; | |
1631 | ||
03033af4 | 1632 | if (code != TRUTH_ANDIF_EXPR |
1633 | && code != TRUTH_AND_EXPR | |
1634 | && code != TRUTH_ORIF_EXPR | |
1635 | && code != TRUTH_OR_EXPR) | |
1636 | return; | |
1637 | ||
1638 | /* Warn if &&/|| are being used in a context where it is | |
1639 | likely that the bitwise equivalent was intended by the | |
1640 | programmer. That is, an expression such as op && MASK | |
1641 | where op should not be any boolean expression, nor a | |
1642 | constant, and mask seems to be a non-boolean integer constant. */ | |
1643 | if (!truth_value_p (code_left) | |
1644 | && INTEGRAL_TYPE_P (TREE_TYPE (op_left)) | |
1645 | && !CONSTANT_CLASS_P (op_left) | |
1646 | && !TREE_NO_WARNING (op_left) | |
1647 | && TREE_CODE (op_right) == INTEGER_CST | |
1648 | && !integer_zerop (op_right) | |
1649 | && !integer_onep (op_right)) | |
b13d1547 | 1650 | { |
9c20c4fc | 1651 | if (or_op) |
03033af4 | 1652 | warning_at (location, OPT_Wlogical_op, "logical %<or%>" |
1653 | " applied to non-boolean constant"); | |
1654 | else | |
1655 | warning_at (location, OPT_Wlogical_op, "logical %<and%>" | |
1656 | " applied to non-boolean constant"); | |
1657 | TREE_NO_WARNING (op_left) = true; | |
9c20c4fc | 1658 | return; |
1659 | } | |
1660 | ||
1661 | /* We do not warn for constants because they are typical of macro | |
1662 | expansions that test for features. */ | |
1663 | if (CONSTANT_CLASS_P (op_left) || CONSTANT_CLASS_P (op_right)) | |
1664 | return; | |
1665 | ||
1666 | /* This warning only makes sense with logical operands. */ | |
1667 | if (!(truth_value_p (TREE_CODE (op_left)) | |
1668 | || INTEGRAL_TYPE_P (TREE_TYPE (op_left))) | |
1669 | || !(truth_value_p (TREE_CODE (op_right)) | |
1670 | || INTEGRAL_TYPE_P (TREE_TYPE (op_right)))) | |
1671 | return; | |
1672 | ||
9c20c4fc | 1673 | |
686369e8 | 1674 | /* We first test whether either side separately is trivially true |
1675 | (with OR) or trivially false (with AND). If so, do not warn. | |
1676 | This is a common idiom for testing ranges of data types in | |
1677 | portable code. */ | |
1678 | lhs = make_range (op_left, &in0_p, &low0, &high0, &strict_overflow_p); | |
1679 | if (!lhs) | |
1680 | return; | |
1681 | if (TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) | |
9c20c4fc | 1682 | lhs = C_MAYBE_CONST_EXPR_EXPR (lhs); |
1683 | ||
686369e8 | 1684 | /* If this is an OR operation, invert both sides; now, the result |
1685 | should be always false to get a warning. */ | |
1686 | if (or_op) | |
1687 | in0_p = !in0_p; | |
1688 | ||
1689 | tem = build_range_check (UNKNOWN_LOCATION, type, lhs, in0_p, low0, high0); | |
d42e7c5a | 1690 | if (tem && integer_zerop (tem)) |
686369e8 | 1691 | return; |
1692 | ||
1693 | rhs = make_range (op_right, &in1_p, &low1, &high1, &strict_overflow_p); | |
1694 | if (!rhs) | |
1695 | return; | |
1696 | if (TREE_CODE (rhs) == C_MAYBE_CONST_EXPR) | |
9c20c4fc | 1697 | rhs = C_MAYBE_CONST_EXPR_EXPR (rhs); |
48e1416a | 1698 | |
686369e8 | 1699 | /* If this is an OR operation, invert both sides; now, the result |
1700 | should be always false to get a warning. */ | |
9c20c4fc | 1701 | if (or_op) |
686369e8 | 1702 | in1_p = !in1_p; |
48e1416a | 1703 | |
686369e8 | 1704 | tem = build_range_check (UNKNOWN_LOCATION, type, rhs, in1_p, low1, high1); |
d42e7c5a | 1705 | if (tem && integer_zerop (tem)) |
686369e8 | 1706 | return; |
1707 | ||
1708 | /* If both expressions have the same operand, if we can merge the | |
1709 | ranges, and if the range test is always false, then warn. */ | |
1710 | if (operand_equal_p (lhs, rhs, 0) | |
9c20c4fc | 1711 | && merge_ranges (&in_p, &low, &high, in0_p, low0, high0, |
1712 | in1_p, low1, high1) | |
389dd41b | 1713 | && 0 != (tem = build_range_check (UNKNOWN_LOCATION, |
686369e8 | 1714 | type, lhs, in_p, low, high)) |
1715 | && integer_zerop (tem)) | |
9c20c4fc | 1716 | { |
9c20c4fc | 1717 | if (or_op) |
1718 | warning_at (location, OPT_Wlogical_op, | |
1719 | "logical %<or%> " | |
1720 | "of collectively exhaustive tests is always true"); | |
1721 | else | |
1722 | warning_at (location, OPT_Wlogical_op, | |
1723 | "logical %<and%> " | |
1724 | "of mutually exclusive tests is always false"); | |
b13d1547 | 1725 | } |
1726 | } | |
1727 | ||
32dc1512 | 1728 | /* Warn about logical not used on the left hand side operand of a comparison. |
1729 | This function assumes that the LHS is inside of TRUTH_NOT_EXPR. | |
1730 | Do not warn if the LHS or RHS is of a boolean or a vector type. */ | |
1731 | ||
1732 | void | |
1733 | warn_logical_not_parentheses (location_t location, enum tree_code code, | |
1734 | tree lhs, tree rhs) | |
1735 | { | |
1736 | if (TREE_CODE_CLASS (code) != tcc_comparison) | |
1737 | return; | |
1738 | if (TREE_TYPE (lhs) == NULL_TREE | |
1739 | || TREE_TYPE (rhs) == NULL_TREE) | |
1740 | ; | |
1741 | else if (TREE_CODE (TREE_TYPE (lhs)) == BOOLEAN_TYPE | |
1742 | || TREE_CODE (TREE_TYPE (rhs)) == BOOLEAN_TYPE | |
1743 | || VECTOR_TYPE_P (TREE_TYPE (lhs)) | |
1744 | || VECTOR_TYPE_P (TREE_TYPE (rhs))) | |
1745 | return; | |
1746 | ||
1747 | warning_at (location, OPT_Wlogical_not_parentheses, | |
1748 | "logical not is only applied to the left hand side of " | |
1749 | "comparison"); | |
1750 | } | |
b13d1547 | 1751 | |
3d177e8c | 1752 | /* Warn if EXP contains any computations whose results are not used. |
1753 | Return true if a warning is printed; false otherwise. LOCUS is the | |
1754 | (potential) location of the expression. */ | |
1755 | ||
1756 | bool | |
1757 | warn_if_unused_value (const_tree exp, location_t locus) | |
1758 | { | |
1759 | restart: | |
1760 | if (TREE_USED (exp) || TREE_NO_WARNING (exp)) | |
1761 | return false; | |
1762 | ||
1763 | /* Don't warn about void constructs. This includes casting to void, | |
1764 | void function calls, and statement expressions with a final cast | |
1765 | to void. */ | |
1766 | if (VOID_TYPE_P (TREE_TYPE (exp))) | |
1767 | return false; | |
1768 | ||
1769 | if (EXPR_HAS_LOCATION (exp)) | |
1770 | locus = EXPR_LOCATION (exp); | |
1771 | ||
1772 | switch (TREE_CODE (exp)) | |
1773 | { | |
1774 | case PREINCREMENT_EXPR: | |
1775 | case POSTINCREMENT_EXPR: | |
1776 | case PREDECREMENT_EXPR: | |
1777 | case POSTDECREMENT_EXPR: | |
1778 | case MODIFY_EXPR: | |
1779 | case INIT_EXPR: | |
1780 | case TARGET_EXPR: | |
1781 | case CALL_EXPR: | |
1782 | case TRY_CATCH_EXPR: | |
1783 | case WITH_CLEANUP_EXPR: | |
1784 | case EXIT_EXPR: | |
1785 | case VA_ARG_EXPR: | |
1786 | return false; | |
1787 | ||
1788 | case BIND_EXPR: | |
1789 | /* For a binding, warn if no side effect within it. */ | |
1790 | exp = BIND_EXPR_BODY (exp); | |
1791 | goto restart; | |
1792 | ||
1793 | case SAVE_EXPR: | |
1794 | case NON_LVALUE_EXPR: | |
d85dbdb3 | 1795 | case NOP_EXPR: |
3d177e8c | 1796 | exp = TREE_OPERAND (exp, 0); |
1797 | goto restart; | |
1798 | ||
1799 | case TRUTH_ORIF_EXPR: | |
1800 | case TRUTH_ANDIF_EXPR: | |
1801 | /* In && or ||, warn if 2nd operand has no side effect. */ | |
1802 | exp = TREE_OPERAND (exp, 1); | |
1803 | goto restart; | |
1804 | ||
1805 | case COMPOUND_EXPR: | |
1806 | if (warn_if_unused_value (TREE_OPERAND (exp, 0), locus)) | |
1807 | return true; | |
1808 | /* Let people do `(foo (), 0)' without a warning. */ | |
1809 | if (TREE_CONSTANT (TREE_OPERAND (exp, 1))) | |
1810 | return false; | |
1811 | exp = TREE_OPERAND (exp, 1); | |
1812 | goto restart; | |
1813 | ||
1814 | case COND_EXPR: | |
1815 | /* If this is an expression with side effects, don't warn; this | |
1816 | case commonly appears in macro expansions. */ | |
1817 | if (TREE_SIDE_EFFECTS (exp)) | |
1818 | return false; | |
1819 | goto warn; | |
1820 | ||
1821 | case INDIRECT_REF: | |
1822 | /* Don't warn about automatic dereferencing of references, since | |
1823 | the user cannot control it. */ | |
1824 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == REFERENCE_TYPE) | |
1825 | { | |
1826 | exp = TREE_OPERAND (exp, 0); | |
1827 | goto restart; | |
1828 | } | |
1829 | /* Fall through. */ | |
1830 | ||
1831 | default: | |
1832 | /* Referencing a volatile value is a side effect, so don't warn. */ | |
1833 | if ((DECL_P (exp) || REFERENCE_CLASS_P (exp)) | |
1834 | && TREE_THIS_VOLATILE (exp)) | |
1835 | return false; | |
1836 | ||
1837 | /* If this is an expression which has no operands, there is no value | |
1838 | to be unused. There are no such language-independent codes, | |
1839 | but front ends may define such. */ | |
1840 | if (EXPRESSION_CLASS_P (exp) && TREE_OPERAND_LENGTH (exp) == 0) | |
1841 | return false; | |
1842 | ||
1843 | warn: | |
1844 | return warning_at (locus, OPT_Wunused_value, "value computed is not used"); | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | ||
bcf22371 | 1849 | /* Print a warning about casts that might indicate violation |
1850 | of strict aliasing rules if -Wstrict-aliasing is used and | |
1e31ff37 | 1851 | strict aliasing mode is in effect. OTYPE is the original |
1852 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
bcf22371 | 1853 | |
e6fa0ea6 | 1854 | bool |
1e31ff37 | 1855 | strict_aliasing_warning (tree otype, tree type, tree expr) |
bcf22371 | 1856 | { |
45bb3afb | 1857 | /* Strip pointer conversion chains and get to the correct original type. */ |
1858 | STRIP_NOPS (expr); | |
1859 | otype = TREE_TYPE (expr); | |
1860 | ||
f06537f2 | 1861 | if (!(flag_strict_aliasing |
1862 | && POINTER_TYPE_P (type) | |
1863 | && POINTER_TYPE_P (otype) | |
1864 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
1865 | /* If the type we are casting to is a ref-all pointer | |
1866 | dereferencing it is always valid. */ | |
1867 | || TYPE_REF_CAN_ALIAS_ALL (type)) | |
e6fa0ea6 | 1868 | return false; |
1869 | ||
1870 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
bcf22371 | 1871 | && (DECL_P (TREE_OPERAND (expr, 0)) |
e6fa0ea6 | 1872 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
bcf22371 | 1873 | { |
1874 | /* Casting the address of an object to non void pointer. Warn | |
1875 | if the cast breaks type based aliasing. */ | |
e6fa0ea6 | 1876 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
1877 | { | |
1878 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
1879 | "might break strict-aliasing rules"); | |
1880 | return true; | |
1881 | } | |
bcf22371 | 1882 | else |
1883 | { | |
48e1416a | 1884 | /* warn_strict_aliasing >= 3. This includes the default (3). |
e6fa0ea6 | 1885 | Only warn if the cast is dereferenced immediately. */ |
32c2fdea | 1886 | alias_set_type set1 = |
e6fa0ea6 | 1887 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
32c2fdea | 1888 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
bcf22371 | 1889 | |
62d823d0 | 1890 | if (set1 != set2 && set2 != 0 |
1891 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
e6fa0ea6 | 1892 | { |
1893 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1894 | "pointer will break strict-aliasing rules"); | |
1895 | return true; | |
1896 | } | |
1897 | else if (warn_strict_aliasing == 2 | |
879f881c | 1898 | && !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 1899 | { |
1900 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1901 | "pointer might break strict-aliasing rules"); | |
1902 | return true; | |
1903 | } | |
bcf22371 | 1904 | } |
1905 | } | |
e6fa0ea6 | 1906 | else |
1907 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
1908 | { | |
1909 | /* At this level, warn for any conversions, even if an address is | |
1910 | not taken in the same statement. This will likely produce many | |
1911 | false positives, but could be useful to pinpoint problems that | |
1912 | are not revealed at higher levels. */ | |
32c2fdea | 1913 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
1914 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
1915 | if (!COMPLETE_TYPE_P (type) | |
879f881c | 1916 | || !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 1917 | { |
1918 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1919 | "pointer might break strict-aliasing rules"); | |
1920 | return true; | |
1921 | } | |
1922 | } | |
1923 | ||
1924 | return false; | |
bcf22371 | 1925 | } |
1926 | ||
f003f5dc | 1927 | /* Warn about memset (&a, 0, sizeof (&a)); and similar mistakes with |
1928 | sizeof as last operand of certain builtins. */ | |
1929 | ||
1930 | void | |
57f872a2 | 1931 | sizeof_pointer_memaccess_warning (location_t *sizeof_arg_loc, tree callee, |
f1f41a6c | 1932 | vec<tree, va_gc> *params, tree *sizeof_arg, |
f003f5dc | 1933 | bool (*comp_types) (tree, tree)) |
1934 | { | |
1935 | tree type, dest = NULL_TREE, src = NULL_TREE, tem; | |
57f872a2 | 1936 | bool strop = false, cmp = false; |
1937 | unsigned int idx = ~0; | |
1938 | location_t loc; | |
f003f5dc | 1939 | |
1940 | if (TREE_CODE (callee) != FUNCTION_DECL | |
1941 | || DECL_BUILT_IN_CLASS (callee) != BUILT_IN_NORMAL | |
f1f41a6c | 1942 | || vec_safe_length (params) <= 1) |
f003f5dc | 1943 | return; |
1944 | ||
f003f5dc | 1945 | switch (DECL_FUNCTION_CODE (callee)) |
1946 | { | |
1947 | case BUILT_IN_STRNCMP: | |
1948 | case BUILT_IN_STRNCASECMP: | |
57f872a2 | 1949 | cmp = true; |
1950 | /* FALLTHRU */ | |
f003f5dc | 1951 | case BUILT_IN_STRNCPY: |
57f872a2 | 1952 | case BUILT_IN_STRNCPY_CHK: |
f003f5dc | 1953 | case BUILT_IN_STRNCAT: |
57f872a2 | 1954 | case BUILT_IN_STRNCAT_CHK: |
1955 | case BUILT_IN_STPNCPY: | |
1956 | case BUILT_IN_STPNCPY_CHK: | |
f003f5dc | 1957 | strop = true; |
1958 | /* FALLTHRU */ | |
1959 | case BUILT_IN_MEMCPY: | |
57f872a2 | 1960 | case BUILT_IN_MEMCPY_CHK: |
f003f5dc | 1961 | case BUILT_IN_MEMMOVE: |
57f872a2 | 1962 | case BUILT_IN_MEMMOVE_CHK: |
f1f41a6c | 1963 | if (params->length () < 3) |
57f872a2 | 1964 | return; |
f1f41a6c | 1965 | src = (*params)[1]; |
1966 | dest = (*params)[0]; | |
57f872a2 | 1967 | idx = 2; |
1968 | break; | |
1969 | case BUILT_IN_BCOPY: | |
f1f41a6c | 1970 | if (params->length () < 3) |
57f872a2 | 1971 | return; |
f1f41a6c | 1972 | src = (*params)[0]; |
1973 | dest = (*params)[1]; | |
57f872a2 | 1974 | idx = 2; |
1975 | break; | |
f003f5dc | 1976 | case BUILT_IN_MEMCMP: |
57f872a2 | 1977 | case BUILT_IN_BCMP: |
f1f41a6c | 1978 | if (params->length () < 3) |
f003f5dc | 1979 | return; |
f1f41a6c | 1980 | src = (*params)[1]; |
1981 | dest = (*params)[0]; | |
57f872a2 | 1982 | idx = 2; |
1983 | cmp = true; | |
f003f5dc | 1984 | break; |
1985 | case BUILT_IN_MEMSET: | |
57f872a2 | 1986 | case BUILT_IN_MEMSET_CHK: |
f1f41a6c | 1987 | if (params->length () < 3) |
f003f5dc | 1988 | return; |
f1f41a6c | 1989 | dest = (*params)[0]; |
57f872a2 | 1990 | idx = 2; |
1991 | break; | |
1992 | case BUILT_IN_BZERO: | |
f1f41a6c | 1993 | dest = (*params)[0]; |
57f872a2 | 1994 | idx = 1; |
f003f5dc | 1995 | break; |
1996 | case BUILT_IN_STRNDUP: | |
f1f41a6c | 1997 | src = (*params)[0]; |
f003f5dc | 1998 | strop = true; |
57f872a2 | 1999 | idx = 1; |
2000 | break; | |
2001 | case BUILT_IN_MEMCHR: | |
f1f41a6c | 2002 | if (params->length () < 3) |
57f872a2 | 2003 | return; |
f1f41a6c | 2004 | src = (*params)[0]; |
57f872a2 | 2005 | idx = 2; |
2006 | break; | |
2007 | case BUILT_IN_SNPRINTF: | |
2008 | case BUILT_IN_SNPRINTF_CHK: | |
2009 | case BUILT_IN_VSNPRINTF: | |
2010 | case BUILT_IN_VSNPRINTF_CHK: | |
f1f41a6c | 2011 | dest = (*params)[0]; |
57f872a2 | 2012 | idx = 1; |
2013 | strop = true; | |
f003f5dc | 2014 | break; |
2015 | default: | |
2016 | break; | |
2017 | } | |
2018 | ||
57f872a2 | 2019 | if (idx >= 3) |
2020 | return; | |
2021 | ||
2022 | if (sizeof_arg[idx] == NULL || sizeof_arg[idx] == error_mark_node) | |
2023 | return; | |
2024 | ||
2025 | type = TYPE_P (sizeof_arg[idx]) | |
2026 | ? sizeof_arg[idx] : TREE_TYPE (sizeof_arg[idx]); | |
2027 | if (!POINTER_TYPE_P (type)) | |
2028 | return; | |
2029 | ||
f003f5dc | 2030 | if (dest |
2031 | && (tem = tree_strip_nop_conversions (dest)) | |
2032 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2033 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2034 | return; | |
2035 | ||
2036 | if (src | |
2037 | && (tem = tree_strip_nop_conversions (src)) | |
2038 | && POINTER_TYPE_P (TREE_TYPE (tem)) | |
2039 | && comp_types (TREE_TYPE (TREE_TYPE (tem)), type)) | |
2040 | return; | |
2041 | ||
57f872a2 | 2042 | loc = sizeof_arg_loc[idx]; |
2043 | ||
2044 | if (dest && !cmp) | |
f003f5dc | 2045 | { |
57f872a2 | 2046 | if (!TYPE_P (sizeof_arg[idx]) |
2047 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
f003f5dc | 2048 | && comp_types (TREE_TYPE (dest), type)) |
2049 | { | |
57f872a2 | 2050 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
f003f5dc | 2051 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2052 | "argument to %<sizeof%> in %qD call is the same " | |
2053 | "expression as the destination; did you mean to " | |
2054 | "remove the addressof?", callee); | |
2055 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2056 | == TYPE_PRECISION (char_type_node)) | |
2057 | || strop) | |
2058 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2059 | "argument to %<sizeof%> in %qD call is the same " | |
2060 | "expression as the destination; did you mean to " | |
2061 | "provide an explicit length?", callee); | |
2062 | else | |
2063 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2064 | "argument to %<sizeof%> in %qD call is the same " | |
2065 | "expression as the destination; did you mean to " | |
2066 | "dereference it?", callee); | |
2067 | return; | |
2068 | } | |
2069 | ||
2070 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2071 | && !strop | |
2072 | && comp_types (TREE_TYPE (dest), type) | |
2073 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2074 | { | |
2075 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2076 | "argument to %<sizeof%> in %qD call is the same " | |
2077 | "pointer type %qT as the destination; expected %qT " | |
2078 | "or an explicit length", callee, TREE_TYPE (dest), | |
2079 | TREE_TYPE (TREE_TYPE (dest))); | |
2080 | return; | |
2081 | } | |
2082 | } | |
2083 | ||
57f872a2 | 2084 | if (src && !cmp) |
f003f5dc | 2085 | { |
57f872a2 | 2086 | if (!TYPE_P (sizeof_arg[idx]) |
2087 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
f003f5dc | 2088 | && comp_types (TREE_TYPE (src), type)) |
2089 | { | |
57f872a2 | 2090 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) |
f003f5dc | 2091 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, |
2092 | "argument to %<sizeof%> in %qD call is the same " | |
2093 | "expression as the source; did you mean to " | |
2094 | "remove the addressof?", callee); | |
2095 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2096 | == TYPE_PRECISION (char_type_node)) | |
2097 | || strop) | |
2098 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2099 | "argument to %<sizeof%> in %qD call is the same " | |
2100 | "expression as the source; did you mean to " | |
2101 | "provide an explicit length?", callee); | |
2102 | else | |
2103 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2104 | "argument to %<sizeof%> in %qD call is the same " | |
2105 | "expression as the source; did you mean to " | |
2106 | "dereference it?", callee); | |
2107 | return; | |
2108 | } | |
2109 | ||
2110 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2111 | && !strop | |
2112 | && comp_types (TREE_TYPE (src), type) | |
2113 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2114 | { | |
2115 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2116 | "argument to %<sizeof%> in %qD call is the same " | |
2117 | "pointer type %qT as the source; expected %qT " | |
2118 | "or an explicit length", callee, TREE_TYPE (src), | |
2119 | TREE_TYPE (TREE_TYPE (src))); | |
2120 | return; | |
2121 | } | |
2122 | } | |
57f872a2 | 2123 | |
2124 | if (dest) | |
2125 | { | |
2126 | if (!TYPE_P (sizeof_arg[idx]) | |
2127 | && operand_equal_p (dest, sizeof_arg[idx], 0) | |
2128 | && comp_types (TREE_TYPE (dest), type)) | |
2129 | { | |
2130 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2131 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2132 | "argument to %<sizeof%> in %qD call is the same " | |
2133 | "expression as the first source; did you mean to " | |
2134 | "remove the addressof?", callee); | |
2135 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2136 | == TYPE_PRECISION (char_type_node)) | |
2137 | || strop) | |
2138 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2139 | "argument to %<sizeof%> in %qD call is the same " | |
2140 | "expression as the first source; did you mean to " | |
2141 | "provide an explicit length?", callee); | |
2142 | else | |
2143 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2144 | "argument to %<sizeof%> in %qD call is the same " | |
2145 | "expression as the first source; did you mean to " | |
2146 | "dereference it?", callee); | |
2147 | return; | |
2148 | } | |
2149 | ||
2150 | if (POINTER_TYPE_P (TREE_TYPE (dest)) | |
2151 | && !strop | |
2152 | && comp_types (TREE_TYPE (dest), type) | |
2153 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2154 | { | |
2155 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2156 | "argument to %<sizeof%> in %qD call is the same " | |
2157 | "pointer type %qT as the first source; expected %qT " | |
2158 | "or an explicit length", callee, TREE_TYPE (dest), | |
2159 | TREE_TYPE (TREE_TYPE (dest))); | |
2160 | return; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | if (src) | |
2165 | { | |
2166 | if (!TYPE_P (sizeof_arg[idx]) | |
2167 | && operand_equal_p (src, sizeof_arg[idx], 0) | |
2168 | && comp_types (TREE_TYPE (src), type)) | |
2169 | { | |
2170 | if (TREE_CODE (sizeof_arg[idx]) == ADDR_EXPR && !strop) | |
2171 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2172 | "argument to %<sizeof%> in %qD call is the same " | |
2173 | "expression as the second source; did you mean to " | |
2174 | "remove the addressof?", callee); | |
2175 | else if ((TYPE_PRECISION (TREE_TYPE (type)) | |
2176 | == TYPE_PRECISION (char_type_node)) | |
2177 | || strop) | |
2178 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2179 | "argument to %<sizeof%> in %qD call is the same " | |
2180 | "expression as the second source; did you mean to " | |
2181 | "provide an explicit length?", callee); | |
2182 | else | |
2183 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2184 | "argument to %<sizeof%> in %qD call is the same " | |
2185 | "expression as the second source; did you mean to " | |
2186 | "dereference it?", callee); | |
2187 | return; | |
2188 | } | |
2189 | ||
2190 | if (POINTER_TYPE_P (TREE_TYPE (src)) | |
2191 | && !strop | |
2192 | && comp_types (TREE_TYPE (src), type) | |
2193 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
2194 | { | |
2195 | warning_at (loc, OPT_Wsizeof_pointer_memaccess, | |
2196 | "argument to %<sizeof%> in %qD call is the same " | |
2197 | "pointer type %qT as the second source; expected %qT " | |
2198 | "or an explicit length", callee, TREE_TYPE (src), | |
2199 | TREE_TYPE (TREE_TYPE (src))); | |
2200 | return; | |
2201 | } | |
2202 | } | |
2203 | ||
f003f5dc | 2204 | } |
2205 | ||
3f08e399 | 2206 | /* Warn for unlikely, improbable, or stupid DECL declarations |
2207 | of `main'. */ | |
2208 | ||
2209 | void | |
2210 | check_main_parameter_types (tree decl) | |
2211 | { | |
d0af78c5 | 2212 | function_args_iterator iter; |
2213 | tree type; | |
3f08e399 | 2214 | int argct = 0; |
2215 | ||
d0af78c5 | 2216 | FOREACH_FUNCTION_ARGS (TREE_TYPE (decl), type, iter) |
2217 | { | |
2218 | /* XXX void_type_node belies the abstraction. */ | |
2219 | if (type == void_type_node || type == error_mark_node ) | |
2220 | break; | |
2221 | ||
2026249a | 2222 | tree t = type; |
2223 | if (TYPE_ATOMIC (t)) | |
2224 | pedwarn (input_location, OPT_Wmain, | |
2225 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2226 | type, decl); | |
2227 | while (POINTER_TYPE_P (t)) | |
2228 | { | |
2229 | t = TREE_TYPE (t); | |
2230 | if (TYPE_ATOMIC (t)) | |
2231 | pedwarn (input_location, OPT_Wmain, | |
2232 | "%<_Atomic%>-qualified parameter type %qT of %q+D", | |
2233 | type, decl); | |
2234 | } | |
2235 | ||
d0af78c5 | 2236 | ++argct; |
2237 | switch (argct) | |
2238 | { | |
2239 | case 1: | |
2240 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
2241 | pedwarn (input_location, OPT_Wmain, | |
2242 | "first argument of %q+D should be %<int%>", decl); | |
2243 | break; | |
2244 | ||
2245 | case 2: | |
2246 | if (TREE_CODE (type) != POINTER_TYPE | |
2247 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2248 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2249 | != char_type_node)) | |
2250 | pedwarn (input_location, OPT_Wmain, | |
2251 | "second argument of %q+D should be %<char **%>", decl); | |
2252 | break; | |
2253 | ||
2254 | case 3: | |
2255 | if (TREE_CODE (type) != POINTER_TYPE | |
2256 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
2257 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
2258 | != char_type_node)) | |
2259 | pedwarn (input_location, OPT_Wmain, | |
2260 | "third argument of %q+D should probably be " | |
2261 | "%<char **%>", decl); | |
2262 | break; | |
2263 | } | |
2264 | } | |
3f08e399 | 2265 | |
2266 | /* It is intentional that this message does not mention the third | |
2267 | argument because it's only mentioned in an appendix of the | |
2268 | standard. */ | |
2269 | if (argct > 0 && (argct < 2 || argct > 3)) | |
d0af78c5 | 2270 | pedwarn (input_location, OPT_Wmain, |
2271 | "%q+D takes only zero or two arguments", decl); | |
90e645fa | 2272 | |
2273 | if (stdarg_p (TREE_TYPE (decl))) | |
2274 | pedwarn (input_location, OPT_Wmain, | |
2275 | "%q+D declared as variadic function", decl); | |
3f08e399 | 2276 | } |
2277 | ||
73437615 | 2278 | /* vector_targets_convertible_p is used for vector pointer types. The |
2279 | callers perform various checks that the qualifiers are satisfactory, | |
2280 | while OTOH vector_targets_convertible_p ignores the number of elements | |
2281 | in the vectors. That's fine with vector pointers as we can consider, | |
2282 | say, a vector of 8 elements as two consecutive vectors of 4 elements, | |
2283 | and that does not require and conversion of the pointer values. | |
2284 | In contrast, vector_types_convertible_p and | |
2285 | vector_types_compatible_elements_p are used for vector value types. */ | |
ed7c4e62 | 2286 | /* True if pointers to distinct types T1 and T2 can be converted to |
2287 | each other without an explicit cast. Only returns true for opaque | |
2288 | vector types. */ | |
2289 | bool | |
2290 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
2291 | { | |
2292 | if (TREE_CODE (t1) == VECTOR_TYPE && TREE_CODE (t2) == VECTOR_TYPE | |
8d125f7d | 2293 | && (TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ed7c4e62 | 2294 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2295 | return true; | |
2296 | ||
2297 | return false; | |
2298 | } | |
2299 | ||
73437615 | 2300 | /* vector_types_convertible_p is used for vector value types. |
2301 | It could in principle call vector_targets_convertible_p as a subroutine, | |
2302 | but then the check for vector type would be duplicated with its callers, | |
2303 | and also the purpose of vector_targets_convertible_p would become | |
2304 | muddled. | |
2305 | Where vector_types_convertible_p returns true, a conversion might still be | |
2306 | needed to make the types match. | |
2307 | In contrast, vector_targets_convertible_p is used for vector pointer | |
2308 | values, and vector_types_compatible_elements_p is used specifically | |
2309 | in the context for binary operators, as a check if use is possible without | |
2310 | conversion. */ | |
546c4794 | 2311 | /* True if vector types T1 and T2 can be converted to each other |
2312 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
2313 | can only be converted with -flax-vector-conversions yet that is not | |
2314 | in effect, emit a note telling the user about that option if such | |
2315 | a note has not previously been emitted. */ | |
2316 | bool | |
9f627b1a | 2317 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
8b4b9810 | 2318 | { |
546c4794 | 2319 | static bool emitted_lax_note = false; |
ae6db8ab | 2320 | bool convertible_lax; |
2321 | ||
8d125f7d | 2322 | if ((TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ae6db8ab | 2323 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
2324 | return true; | |
2325 | ||
2326 | convertible_lax = | |
2327 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
2328 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
432dd330 | 2329 | TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2)) |
ae6db8ab | 2330 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) |
2331 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
546c4794 | 2332 | |
2333 | if (!convertible_lax || flag_lax_vector_conversions) | |
2334 | return convertible_lax; | |
2335 | ||
2336 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
29f51994 | 2337 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
546c4794 | 2338 | return true; |
2339 | ||
2340 | if (emit_lax_note && !emitted_lax_note) | |
2341 | { | |
2342 | emitted_lax_note = true; | |
5bcc316e | 2343 | inform (input_location, "use -flax-vector-conversions to permit " |
546c4794 | 2344 | "conversions between vectors with differing " |
2345 | "element types or numbers of subparts"); | |
2346 | } | |
2347 | ||
2348 | return false; | |
8b4b9810 | 2349 | } |
2350 | ||
bf0cb017 | 2351 | /* Build a VEC_PERM_EXPR if V0, V1 and MASK are not error_mark_nodes |
2352 | and have vector types, V0 has the same type as V1, and the number of | |
2353 | elements of V0, V1, MASK is the same. | |
2354 | ||
2355 | In case V1 is a NULL_TREE it is assumed that __builtin_shuffle was | |
2356 | called with two arguments. In this case implementation passes the | |
2357 | first argument twice in order to share the same tree code. This fact | |
2358 | could enable the mask-values being twice the vector length. This is | |
2359 | an implementation accident and this semantics is not guaranteed to | |
2360 | the user. */ | |
2361 | tree | |
68ea4406 | 2362 | c_build_vec_perm_expr (location_t loc, tree v0, tree v1, tree mask, |
2363 | bool complain) | |
bf0cb017 | 2364 | { |
2365 | tree ret; | |
2366 | bool wrap = true; | |
2367 | bool maybe_const = false; | |
2368 | bool two_arguments = false; | |
2369 | ||
2370 | if (v1 == NULL_TREE) | |
2371 | { | |
2372 | two_arguments = true; | |
2373 | v1 = v0; | |
2374 | } | |
2375 | ||
2376 | if (v0 == error_mark_node || v1 == error_mark_node | |
2377 | || mask == error_mark_node) | |
2378 | return error_mark_node; | |
2379 | ||
2380 | if (TREE_CODE (TREE_TYPE (mask)) != VECTOR_TYPE | |
2381 | || TREE_CODE (TREE_TYPE (TREE_TYPE (mask))) != INTEGER_TYPE) | |
2382 | { | |
68ea4406 | 2383 | if (complain) |
2384 | error_at (loc, "__builtin_shuffle last argument must " | |
2385 | "be an integer vector"); | |
bf0cb017 | 2386 | return error_mark_node; |
2387 | } | |
2388 | ||
2389 | if (TREE_CODE (TREE_TYPE (v0)) != VECTOR_TYPE | |
2390 | || TREE_CODE (TREE_TYPE (v1)) != VECTOR_TYPE) | |
2391 | { | |
68ea4406 | 2392 | if (complain) |
2393 | error_at (loc, "__builtin_shuffle arguments must be vectors"); | |
bf0cb017 | 2394 | return error_mark_node; |
2395 | } | |
2396 | ||
2397 | if (TYPE_MAIN_VARIANT (TREE_TYPE (v0)) != TYPE_MAIN_VARIANT (TREE_TYPE (v1))) | |
2398 | { | |
68ea4406 | 2399 | if (complain) |
2400 | error_at (loc, "__builtin_shuffle argument vectors must be of " | |
2401 | "the same type"); | |
bf0cb017 | 2402 | return error_mark_node; |
2403 | } | |
2404 | ||
2405 | if (TYPE_VECTOR_SUBPARTS (TREE_TYPE (v0)) | |
2406 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask)) | |
2407 | && TYPE_VECTOR_SUBPARTS (TREE_TYPE (v1)) | |
2408 | != TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask))) | |
2409 | { | |
68ea4406 | 2410 | if (complain) |
2411 | error_at (loc, "__builtin_shuffle number of elements of the " | |
2412 | "argument vector(s) and the mask vector should " | |
2413 | "be the same"); | |
bf0cb017 | 2414 | return error_mark_node; |
2415 | } | |
2416 | ||
2417 | if (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (v0)))) | |
2418 | != GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (mask))))) | |
2419 | { | |
68ea4406 | 2420 | if (complain) |
2421 | error_at (loc, "__builtin_shuffle argument vector(s) inner type " | |
2422 | "must have the same size as inner type of the mask"); | |
bf0cb017 | 2423 | return error_mark_node; |
2424 | } | |
2425 | ||
2426 | if (!c_dialect_cxx ()) | |
2427 | { | |
2428 | /* Avoid C_MAYBE_CONST_EXPRs inside VEC_PERM_EXPR. */ | |
2429 | v0 = c_fully_fold (v0, false, &maybe_const); | |
2430 | wrap &= maybe_const; | |
2431 | ||
2432 | if (two_arguments) | |
2433 | v1 = v0 = save_expr (v0); | |
2434 | else | |
2435 | { | |
2436 | v1 = c_fully_fold (v1, false, &maybe_const); | |
2437 | wrap &= maybe_const; | |
2438 | } | |
2439 | ||
2440 | mask = c_fully_fold (mask, false, &maybe_const); | |
2441 | wrap &= maybe_const; | |
2442 | } | |
68ea4406 | 2443 | else if (two_arguments) |
2444 | v1 = v0 = save_expr (v0); | |
bf0cb017 | 2445 | |
2446 | ret = build3_loc (loc, VEC_PERM_EXPR, TREE_TYPE (v0), v0, v1, mask); | |
2447 | ||
2448 | if (!c_dialect_cxx () && !wrap) | |
2449 | ret = c_wrap_maybe_const (ret, true); | |
2450 | ||
2451 | return ret; | |
2452 | } | |
2453 | ||
7f506bca | 2454 | /* Like tree.c:get_narrower, but retain conversion from C++0x scoped enum |
2455 | to integral type. */ | |
2456 | ||
2457 | static tree | |
2458 | c_common_get_narrower (tree op, int *unsignedp_ptr) | |
2459 | { | |
2460 | op = get_narrower (op, unsignedp_ptr); | |
2461 | ||
2462 | if (TREE_CODE (TREE_TYPE (op)) == ENUMERAL_TYPE | |
2463 | && ENUM_IS_SCOPED (TREE_TYPE (op))) | |
2464 | { | |
2465 | /* C++0x scoped enumerations don't implicitly convert to integral | |
2466 | type; if we stripped an explicit conversion to a larger type we | |
2467 | need to replace it so common_type will still work. */ | |
a51edb4c | 2468 | tree type = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op)), |
2469 | TYPE_UNSIGNED (TREE_TYPE (op))); | |
7f506bca | 2470 | op = fold_convert (type, op); |
2471 | } | |
2472 | return op; | |
2473 | } | |
2474 | ||
2561cea2 | 2475 | /* This is a helper function of build_binary_op. |
2476 | ||
2477 | For certain operations if both args were extended from the same | |
2478 | smaller type, do the arithmetic in that type and then extend. | |
2479 | ||
2480 | BITWISE indicates a bitwise operation. | |
2481 | For them, this optimization is safe only if | |
2482 | both args are zero-extended or both are sign-extended. | |
2483 | Otherwise, we might change the result. | |
2484 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
48e1416a | 2485 | but calculated in (unsigned short) it would be (unsigned short)-1. |
2561cea2 | 2486 | */ |
7f506bca | 2487 | tree |
2488 | shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
2561cea2 | 2489 | { |
2490 | int unsigned0, unsigned1; | |
2491 | tree arg0, arg1; | |
2492 | int uns; | |
2493 | tree type; | |
2494 | ||
2495 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
2496 | excessive narrowing when we call get_narrower below. For | |
2497 | example, suppose that OP0 is of unsigned int extended | |
2498 | from signed char and that RESULT_TYPE is long long int. | |
2499 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
2500 | like | |
48e1416a | 2501 | |
2561cea2 | 2502 | (long long int) (unsigned int) signed_char |
2503 | ||
2504 | which get_narrower would narrow down to | |
48e1416a | 2505 | |
2561cea2 | 2506 | (unsigned int) signed char |
48e1416a | 2507 | |
2561cea2 | 2508 | If we do not cast OP0 first, get_narrower would return |
2509 | signed_char, which is inconsistent with the case of the | |
2510 | explicit cast. */ | |
2511 | op0 = convert (result_type, op0); | |
2512 | op1 = convert (result_type, op1); | |
2513 | ||
7f506bca | 2514 | arg0 = c_common_get_narrower (op0, &unsigned0); |
2515 | arg1 = c_common_get_narrower (op1, &unsigned1); | |
ab2c1de8 | 2516 | |
2561cea2 | 2517 | /* UNS is 1 if the operation to be done is an unsigned one. */ |
2518 | uns = TYPE_UNSIGNED (result_type); | |
2519 | ||
2520 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
2521 | but it *requires* conversion to FINAL_TYPE. */ | |
48e1416a | 2522 | |
2561cea2 | 2523 | if ((TYPE_PRECISION (TREE_TYPE (op0)) |
2524 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2525 | && TREE_TYPE (op0) != result_type) | |
2526 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
2527 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
2528 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
2529 | && TREE_TYPE (op1) != result_type) | |
2530 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
48e1416a | 2531 | |
2561cea2 | 2532 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ |
48e1416a | 2533 | |
2561cea2 | 2534 | /* For bitwise operations, signedness of nominal type |
2535 | does not matter. Consider only how operands were extended. */ | |
2536 | if (bitwise) | |
2537 | uns = unsigned0; | |
48e1416a | 2538 | |
2561cea2 | 2539 | /* Note that in all three cases below we refrain from optimizing |
2540 | an unsigned operation on sign-extended args. | |
2541 | That would not be valid. */ | |
48e1416a | 2542 | |
2561cea2 | 2543 | /* Both args variable: if both extended in same way |
2544 | from same width, do it in that width. | |
2545 | Do it unsigned if args were zero-extended. */ | |
2546 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
2547 | < TYPE_PRECISION (result_type)) | |
2548 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2549 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
2550 | && unsigned0 == unsigned1 | |
2551 | && (unsigned0 || !uns)) | |
2552 | return c_common_signed_or_unsigned_type | |
2553 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
2554 | ||
2555 | else if (TREE_CODE (arg0) == INTEGER_CST | |
2556 | && (unsigned1 || !uns) | |
2557 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
2558 | < TYPE_PRECISION (result_type)) | |
2559 | && (type | |
2560 | = c_common_signed_or_unsigned_type (unsigned1, | |
2561 | TREE_TYPE (arg1))) | |
2562 | && !POINTER_TYPE_P (type) | |
2563 | && int_fits_type_p (arg0, type)) | |
2564 | return type; | |
2565 | ||
2566 | else if (TREE_CODE (arg1) == INTEGER_CST | |
2567 | && (unsigned0 || !uns) | |
2568 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
2569 | < TYPE_PRECISION (result_type)) | |
2570 | && (type | |
2571 | = c_common_signed_or_unsigned_type (unsigned0, | |
2572 | TREE_TYPE (arg0))) | |
2573 | && !POINTER_TYPE_P (type) | |
2574 | && int_fits_type_p (arg1, type)) | |
2575 | return type; | |
2576 | ||
2577 | return result_type; | |
2578 | } | |
2579 | ||
22a75734 | 2580 | /* Checks if expression EXPR of real/integer type cannot be converted |
ca9d7d74 | 2581 | to the real/integer type TYPE. Function returns non-zero when: |
22a75734 | 2582 | * EXPR is a constant which cannot be exactly converted to TYPE. |
2583 | * EXPR is not a constant and size of EXPR's type > than size of TYPE, | |
7dfa155b | 2584 | for EXPR type and TYPE being both integers or both real. |
22a75734 | 2585 | * EXPR is not a constant of real type and TYPE is an integer. |
2586 | * EXPR is not a constant of integer type which cannot be | |
2587 | exactly converted to real type. | |
7dfa155b | 2588 | Function allows conversions between types of different signedness and |
ca9d7d74 | 2589 | can return SAFE_CONVERSION (zero) in that case. Function can produce |
2590 | signedness warnings if PRODUCE_WARNS is true. */ | |
22a75734 | 2591 | |
ca9d7d74 | 2592 | enum conversion_safety |
22a75734 | 2593 | unsafe_conversion_p (location_t loc, tree type, tree expr, bool produce_warns) |
d31d55f0 | 2594 | { |
ca9d7d74 | 2595 | enum conversion_safety give_warning = SAFE_CONVERSION; /* is 0 or false */ |
27259707 | 2596 | tree expr_type = TREE_TYPE (expr); |
22a75734 | 2597 | loc = expansion_point_location_if_in_system_header (loc); |
d31d55f0 | 2598 | |
7dfa155b | 2599 | if (TREE_CODE (expr) == REAL_CST || TREE_CODE (expr) == INTEGER_CST) |
5b16c152 | 2600 | { |
d31d55f0 | 2601 | /* Warn for real constant that is not an exact integer converted |
7dfa155b | 2602 | to integer type. */ |
27259707 | 2603 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2604 | && TREE_CODE (type) == INTEGER_TYPE) |
2605 | { | |
2606 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) | |
ca9d7d74 | 2607 | give_warning = UNSAFE_REAL; |
7dfa155b | 2608 | } |
da1fb07b | 2609 | /* Warn for an integer constant that does not fit into integer type. */ |
27259707 | 2610 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2611 | && TREE_CODE (type) == INTEGER_TYPE |
2612 | && !int_fits_type_p (expr, type)) | |
2613 | { | |
2614 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) | |
27259707 | 2615 | && tree_int_cst_sgn (expr) < 0) |
7dfa155b | 2616 | { |
2617 | if (produce_warns) | |
2618 | warning_at (loc, OPT_Wsign_conversion, "negative integer" | |
2619 | " implicitly converted to unsigned type"); | |
2620 | } | |
2621 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) | |
2622 | { | |
2623 | if (produce_warns) | |
2624 | warning_at (loc, OPT_Wsign_conversion, "conversion of unsigned" | |
2625 | " constant value to negative integer"); | |
2626 | } | |
7ee0d227 | 2627 | else |
ca9d7d74 | 2628 | give_warning = UNSAFE_OTHER; |
7dfa155b | 2629 | } |
d31d55f0 | 2630 | else if (TREE_CODE (type) == REAL_TYPE) |
7dfa155b | 2631 | { |
2632 | /* Warn for an integer constant that does not fit into real type. */ | |
2633 | if (TREE_CODE (expr_type) == INTEGER_TYPE) | |
2634 | { | |
2635 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
2636 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 2637 | give_warning = UNSAFE_REAL; |
7dfa155b | 2638 | } |
2639 | /* Warn for a real constant that does not fit into a smaller | |
2640 | real type. */ | |
2641 | else if (TREE_CODE (expr_type) == REAL_TYPE | |
2642 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
2643 | { | |
2644 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
2645 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 2646 | give_warning = UNSAFE_REAL; |
7dfa155b | 2647 | } |
2648 | } | |
2649 | } | |
2650 | else | |
2651 | { | |
d31d55f0 | 2652 | /* Warn for real types converted to integer types. */ |
2561cea2 | 2653 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2654 | && TREE_CODE (type) == INTEGER_TYPE) |
ca9d7d74 | 2655 | give_warning = UNSAFE_REAL; |
d31d55f0 | 2656 | |
2561cea2 | 2657 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2658 | && TREE_CODE (type) == INTEGER_TYPE) |
2659 | { | |
69609004 | 2660 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
f9d856a4 | 2661 | expr = get_unwidened (expr, 0); |
2561cea2 | 2662 | expr_type = TREE_TYPE (expr); |
69609004 | 2663 | |
2561cea2 | 2664 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
48e1416a | 2665 | if (TREE_CODE (expr) == BIT_AND_EXPR |
7dfa155b | 2666 | || TREE_CODE (expr) == BIT_IOR_EXPR |
2561cea2 | 2667 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
2668 | { | |
27259707 | 2669 | /* If both args were extended from a shortest type, |
2670 | use that type if that is safe. */ | |
48e1416a | 2671 | expr_type = shorten_binary_op (expr_type, |
2672 | TREE_OPERAND (expr, 0), | |
2673 | TREE_OPERAND (expr, 1), | |
2561cea2 | 2674 | /* bitwise */1); |
2675 | ||
2561cea2 | 2676 | if (TREE_CODE (expr) == BIT_AND_EXPR) |
2677 | { | |
2678 | tree op0 = TREE_OPERAND (expr, 0); | |
2679 | tree op1 = TREE_OPERAND (expr, 1); | |
30de145b | 2680 | bool unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
2681 | bool unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
2682 | ||
2683 | /* If one of the operands is a non-negative constant | |
2684 | that fits in the target type, then the type of the | |
2685 | other operand does not matter. */ | |
2561cea2 | 2686 | if ((TREE_CODE (op0) == INTEGER_CST |
2687 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
2688 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
2689 | || (TREE_CODE (op1) == INTEGER_CST | |
27259707 | 2690 | && int_fits_type_p (op1, c_common_signed_type (type)) |
48e1416a | 2691 | && int_fits_type_p (op1, |
27259707 | 2692 | c_common_unsigned_type (type)))) |
ca9d7d74 | 2693 | return SAFE_CONVERSION; |
30de145b | 2694 | /* If constant is unsigned and fits in the target |
2695 | type, then the result will also fit. */ | |
2696 | else if ((TREE_CODE (op0) == INTEGER_CST | |
48e1416a | 2697 | && unsigned0 |
30de145b | 2698 | && int_fits_type_p (op0, type)) |
2699 | || (TREE_CODE (op1) == INTEGER_CST | |
2700 | && unsigned1 | |
2701 | && int_fits_type_p (op1, type))) | |
ca9d7d74 | 2702 | return SAFE_CONVERSION; |
2561cea2 | 2703 | } |
2704 | } | |
7dfa155b | 2705 | /* Warn for integer types converted to smaller integer types. */ |
48e1416a | 2706 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
ca9d7d74 | 2707 | give_warning = UNSAFE_OTHER; |
7ee0d227 | 2708 | |
2709 | /* When they are the same width but different signedness, | |
2710 | then the value may change. */ | |
7dfa155b | 2711 | else if (((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
2561cea2 | 2712 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7ee0d227 | 2713 | /* Even when converted to a bigger type, if the type is |
2714 | unsigned but expr is signed, then negative values | |
2715 | will be changed. */ | |
7dfa155b | 2716 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
2717 | && produce_warns) | |
200dd99c | 2718 | warning_at (loc, OPT_Wsign_conversion, "conversion to %qT from %qT " |
2719 | "may change the sign of the result", | |
2720 | type, expr_type); | |
7dfa155b | 2721 | } |
d31d55f0 | 2722 | |
2723 | /* Warn for integer types converted to real types if and only if | |
7dfa155b | 2724 | all the range of values of the integer type cannot be |
2725 | represented by the real type. */ | |
2561cea2 | 2726 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 2727 | && TREE_CODE (type) == REAL_TYPE) |
2728 | { | |
4c2cfa81 | 2729 | tree type_low_bound, type_high_bound; |
7dfa155b | 2730 | REAL_VALUE_TYPE real_low_bound, real_high_bound; |
4c2cfa81 | 2731 | |
2732 | /* Don't warn about char y = 0xff; float x = (int) y; */ | |
2733 | expr = get_unwidened (expr, 0); | |
2734 | expr_type = TREE_TYPE (expr); | |
2735 | ||
7dfa155b | 2736 | type_low_bound = TYPE_MIN_VALUE (expr_type); |
2737 | type_high_bound = TYPE_MAX_VALUE (expr_type); | |
2738 | real_low_bound = real_value_from_int_cst (0, type_low_bound); | |
2739 | real_high_bound = real_value_from_int_cst (0, type_high_bound); | |
d31d55f0 | 2740 | |
7dfa155b | 2741 | if (!exact_real_truncate (TYPE_MODE (type), &real_low_bound) |
2742 | || !exact_real_truncate (TYPE_MODE (type), &real_high_bound)) | |
ca9d7d74 | 2743 | give_warning = UNSAFE_OTHER; |
7dfa155b | 2744 | } |
d31d55f0 | 2745 | |
2746 | /* Warn for real types converted to smaller real types. */ | |
2561cea2 | 2747 | else if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 2748 | && TREE_CODE (type) == REAL_TYPE |
2749 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
ca9d7d74 | 2750 | give_warning = UNSAFE_REAL; |
7dfa155b | 2751 | } |
2752 | ||
2753 | return give_warning; | |
2754 | } | |
2755 | ||
2756 | /* Warns if the conversion of EXPR to TYPE may alter a value. | |
2757 | This is a helper function for warnings_for_convert_and_check. */ | |
2758 | ||
2759 | static void | |
22a75734 | 2760 | conversion_warning (location_t loc, tree type, tree expr) |
7dfa155b | 2761 | { |
7dfa155b | 2762 | tree expr_type = TREE_TYPE (expr); |
ca9d7d74 | 2763 | enum conversion_safety conversion_kind; |
d31d55f0 | 2764 | |
ca9d7d74 | 2765 | if (!warn_conversion && !warn_sign_conversion && !warn_float_conversion) |
7dfa155b | 2766 | return; |
d31d55f0 | 2767 | |
ec704957 | 2768 | /* This may happen, because for LHS op= RHS we preevaluate |
2769 | RHS and create C_MAYBE_CONST_EXPR <SAVE_EXPR <RHS>>, which | |
2770 | means we could no longer see the code of the EXPR. */ | |
2771 | if (TREE_CODE (expr) == C_MAYBE_CONST_EXPR) | |
2772 | expr = C_MAYBE_CONST_EXPR_EXPR (expr); | |
2773 | if (TREE_CODE (expr) == SAVE_EXPR) | |
2774 | expr = TREE_OPERAND (expr, 0); | |
2775 | ||
7dfa155b | 2776 | switch (TREE_CODE (expr)) |
2777 | { | |
2778 | case EQ_EXPR: | |
2779 | case NE_EXPR: | |
2780 | case LE_EXPR: | |
2781 | case GE_EXPR: | |
2782 | case LT_EXPR: | |
2783 | case GT_EXPR: | |
2784 | case TRUTH_ANDIF_EXPR: | |
2785 | case TRUTH_ORIF_EXPR: | |
2786 | case TRUTH_AND_EXPR: | |
2787 | case TRUTH_OR_EXPR: | |
2788 | case TRUTH_XOR_EXPR: | |
2789 | case TRUTH_NOT_EXPR: | |
2790 | /* Conversion from boolean to a signed:1 bit-field (which only | |
2791 | can hold the values 0 and -1) doesn't lose information - but | |
2792 | it does change the value. */ | |
2793 | if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type)) | |
2794 | warning_at (loc, OPT_Wconversion, | |
2795 | "conversion to %qT from boolean expression", type); | |
2796 | return; | |
2797 | ||
2798 | case REAL_CST: | |
2799 | case INTEGER_CST: | |
22a75734 | 2800 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
ca9d7d74 | 2801 | if (conversion_kind == UNSAFE_REAL) |
2802 | warning_at (loc, OPT_Wfloat_conversion, | |
2803 | "conversion to %qT alters %qT constant value", | |
2804 | type, expr_type); | |
2805 | else if (conversion_kind) | |
7dfa155b | 2806 | warning_at (loc, OPT_Wconversion, |
2807 | "conversion to %qT alters %qT constant value", | |
2808 | type, expr_type); | |
2809 | return; | |
2810 | ||
2811 | case COND_EXPR: | |
2812 | { | |
0e4e775a | 2813 | /* In case of COND_EXPR, we do not care about the type of |
2814 | COND_EXPR, only about the conversion of each operand. */ | |
2815 | tree op1 = TREE_OPERAND (expr, 1); | |
2816 | tree op2 = TREE_OPERAND (expr, 2); | |
2817 | ||
22a75734 | 2818 | conversion_warning (loc, type, op1); |
2819 | conversion_warning (loc, type, op2); | |
0e4e775a | 2820 | return; |
7dfa155b | 2821 | } |
2822 | ||
2823 | default: /* 'expr' is not a constant. */ | |
22a75734 | 2824 | conversion_kind = unsafe_conversion_p (loc, type, expr, true); |
ca9d7d74 | 2825 | if (conversion_kind == UNSAFE_REAL) |
2826 | warning_at (loc, OPT_Wfloat_conversion, | |
2827 | "conversion to %qT from %qT may alter its value", | |
2828 | type, expr_type); | |
2829 | else if (conversion_kind) | |
7dfa155b | 2830 | warning_at (loc, OPT_Wconversion, |
200dd99c | 2831 | "conversion to %qT from %qT may alter its value", |
2832 | type, expr_type); | |
d31d55f0 | 2833 | } |
2834 | } | |
2835 | ||
59dd8856 | 2836 | /* Produce warnings after a conversion. RESULT is the result of |
2837 | converting EXPR to TYPE. This is a helper function for | |
2838 | convert_and_check and cp_convert_and_check. */ | |
2a1736ed | 2839 | |
59dd8856 | 2840 | void |
22a75734 | 2841 | warnings_for_convert_and_check (location_t loc, tree type, tree expr, |
2842 | tree result) | |
2a1736ed | 2843 | { |
22a75734 | 2844 | loc = expansion_point_location_if_in_system_header (loc); |
61f69bc9 | 2845 | |
da1fb07b | 2846 | if (TREE_CODE (expr) == INTEGER_CST |
2847 | && (TREE_CODE (type) == INTEGER_TYPE | |
2848 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
2849 | && !int_fits_type_p (expr, type)) | |
2850 | { | |
d31d55f0 | 2851 | /* Do not diagnose overflow in a constant expression merely |
2852 | because a conversion overflowed. */ | |
da1fb07b | 2853 | if (TREE_OVERFLOW (result)) |
eddad94a | 2854 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
2855 | ||
da1fb07b | 2856 | if (TYPE_UNSIGNED (type)) |
d31d55f0 | 2857 | { |
da1fb07b | 2858 | /* This detects cases like converting -129 or 256 to |
2859 | unsigned char. */ | |
2860 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
61f69bc9 | 2861 | warning_at (loc, OPT_Woverflow, |
2862 | "large integer implicitly truncated to unsigned type"); | |
7ee0d227 | 2863 | else |
22a75734 | 2864 | conversion_warning (loc, type, expr); |
da1fb07b | 2865 | } |
48e1416a | 2866 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
22a75734 | 2867 | warning_at (loc, OPT_Woverflow, |
e0913805 | 2868 | "overflow in implicit constant conversion"); |
2869 | /* No warning for converting 0x80000000 to int. */ | |
2870 | else if (pedantic | |
2871 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
2872 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
2873 | != TYPE_PRECISION (type))) | |
61f69bc9 | 2874 | warning_at (loc, OPT_Woverflow, |
2875 | "overflow in implicit constant conversion"); | |
e0913805 | 2876 | |
7ee0d227 | 2877 | else |
22a75734 | 2878 | conversion_warning (loc, type, expr); |
2a1736ed | 2879 | } |
9421ebb9 | 2880 | else if ((TREE_CODE (result) == INTEGER_CST |
2881 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
61f69bc9 | 2882 | warning_at (loc, OPT_Woverflow, |
2883 | "overflow in implicit constant conversion"); | |
7ee0d227 | 2884 | else |
22a75734 | 2885 | conversion_warning (loc, type, expr); |
59dd8856 | 2886 | } |
2887 | ||
2888 | ||
2889 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
2890 | Invoke this function on every expression that is converted implicitly, | |
2891 | i.e. because of language rules and not because of an explicit cast. */ | |
2892 | ||
2893 | tree | |
22a75734 | 2894 | convert_and_check (location_t loc, tree type, tree expr) |
59dd8856 | 2895 | { |
2896 | tree result; | |
c6418a4e | 2897 | tree expr_for_warning; |
2898 | ||
2899 | /* Convert from a value with possible excess precision rather than | |
2900 | via the semantic type, but do not warn about values not fitting | |
2901 | exactly in the semantic type. */ | |
2902 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
2903 | { | |
2904 | tree orig_type = TREE_TYPE (expr); | |
2905 | expr = TREE_OPERAND (expr, 0); | |
2906 | expr_for_warning = convert (orig_type, expr); | |
2907 | if (orig_type == type) | |
2908 | return expr_for_warning; | |
2909 | } | |
2910 | else | |
2911 | expr_for_warning = expr; | |
59dd8856 | 2912 | |
2913 | if (TREE_TYPE (expr) == type) | |
2914 | return expr; | |
48e1416a | 2915 | |
59dd8856 | 2916 | result = convert (type, expr); |
2917 | ||
48d94ede | 2918 | if (c_inhibit_evaluation_warnings == 0 |
2919 | && !TREE_OVERFLOW_P (expr) | |
2920 | && result != error_mark_node) | |
22a75734 | 2921 | warnings_for_convert_and_check (loc, type, expr_for_warning, result); |
59dd8856 | 2922 | |
da1fb07b | 2923 | return result; |
b2806639 | 2924 | } |
2925 | \f | |
4e91a871 | 2926 | /* A node in a list that describes references to variables (EXPR), which are |
2927 | either read accesses if WRITER is zero, or write accesses, in which case | |
2928 | WRITER is the parent of EXPR. */ | |
2929 | struct tlist | |
2930 | { | |
2931 | struct tlist *next; | |
2932 | tree expr, writer; | |
2933 | }; | |
2934 | ||
2935 | /* Used to implement a cache the results of a call to verify_tree. We only | |
2936 | use this for SAVE_EXPRs. */ | |
2937 | struct tlist_cache | |
2938 | { | |
2939 | struct tlist_cache *next; | |
2940 | struct tlist *cache_before_sp; | |
2941 | struct tlist *cache_after_sp; | |
2942 | tree expr; | |
481c6ce6 | 2943 | }; |
2944 | ||
4e91a871 | 2945 | /* Obstack to use when allocating tlist structures, and corresponding |
2946 | firstobj. */ | |
2947 | static struct obstack tlist_obstack; | |
2948 | static char *tlist_firstobj = 0; | |
2949 | ||
2950 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
2951 | warnings. */ | |
2952 | static struct tlist *warned_ids; | |
2953 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
2954 | cache the results. */ | |
2955 | static struct tlist_cache *save_expr_cache; | |
2956 | ||
1cae46be | 2957 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
2958 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
2959 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
2960 | static int warning_candidate_p (tree); | |
79973b57 | 2961 | static bool candidate_equal_p (const_tree, const_tree); |
1cae46be | 2962 | static void warn_for_collisions (struct tlist *); |
2963 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
2964 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
481c6ce6 | 2965 | |
4e91a871 | 2966 | /* Create a new struct tlist and fill in its fields. */ |
2967 | static struct tlist * | |
1cae46be | 2968 | new_tlist (struct tlist *next, tree t, tree writer) |
4e91a871 | 2969 | { |
2970 | struct tlist *l; | |
9318f22c | 2971 | l = XOBNEW (&tlist_obstack, struct tlist); |
4e91a871 | 2972 | l->next = next; |
2973 | l->expr = t; | |
2974 | l->writer = writer; | |
2975 | return l; | |
2976 | } | |
2977 | ||
2978 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
2979 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
2980 | ||
2981 | static void | |
1cae46be | 2982 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
4e91a871 | 2983 | { |
2984 | while (add) | |
2985 | { | |
2986 | struct tlist *next = add->next; | |
84166705 | 2987 | if (!copy) |
4e91a871 | 2988 | add->next = *to; |
79973b57 | 2989 | if (!exclude_writer || !candidate_equal_p (add->writer, exclude_writer)) |
4e91a871 | 2990 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
2991 | add = next; | |
2992 | } | |
2993 | } | |
2994 | ||
2995 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
2996 | each variable that already exists in TO, no new node is added; however if | |
2997 | there is a write access recorded in ADD, and an occurrence on TO is only | |
2998 | a read access, then the occurrence in TO will be modified to record the | |
2999 | write. */ | |
481c6ce6 | 3000 | |
3001 | static void | |
1cae46be | 3002 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
4e91a871 | 3003 | { |
3004 | struct tlist **end = to; | |
3005 | ||
3006 | while (*end) | |
3007 | end = &(*end)->next; | |
3008 | ||
3009 | while (add) | |
3010 | { | |
3011 | int found = 0; | |
3012 | struct tlist *tmp2; | |
3013 | struct tlist *next = add->next; | |
3014 | ||
3015 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
79973b57 | 3016 | if (candidate_equal_p (tmp2->expr, add->expr)) |
4e91a871 | 3017 | { |
3018 | found = 1; | |
84166705 | 3019 | if (!tmp2->writer) |
4e91a871 | 3020 | tmp2->writer = add->writer; |
3021 | } | |
84166705 | 3022 | if (!found) |
4e91a871 | 3023 | { |
312243bb | 3024 | *end = copy ? new_tlist (NULL, add->expr, add->writer) : add; |
4e91a871 | 3025 | end = &(*end)->next; |
3026 | *end = 0; | |
3027 | } | |
3028 | add = next; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
3033 | references in list LIST conflict with it, excluding reads if ONLY writers | |
3034 | is nonzero. */ | |
3035 | ||
3036 | static void | |
1cae46be | 3037 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
3038 | int only_writes) | |
4e91a871 | 3039 | { |
3040 | struct tlist *tmp; | |
3041 | ||
3042 | /* Avoid duplicate warnings. */ | |
3043 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
79973b57 | 3044 | if (candidate_equal_p (tmp->expr, written)) |
4e91a871 | 3045 | return; |
3046 | ||
3047 | while (list) | |
3048 | { | |
79973b57 | 3049 | if (candidate_equal_p (list->expr, written) |
3050 | && !candidate_equal_p (list->writer, writer) | |
3051 | && (!only_writes || list->writer)) | |
4e91a871 | 3052 | { |
3053 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
3df42822 | 3054 | warning_at (EXPR_LOC_OR_LOC (writer, input_location), |
6513b50d | 3055 | OPT_Wsequence_point, "operation on %qE may be undefined", |
3056 | list->expr); | |
4e91a871 | 3057 | } |
3058 | list = list->next; | |
3059 | } | |
3060 | } | |
3061 | ||
3062 | /* Given a list LIST of references to variables, find whether any of these | |
3063 | can cause conflicts due to missing sequence points. */ | |
3064 | ||
3065 | static void | |
1cae46be | 3066 | warn_for_collisions (struct tlist *list) |
4e91a871 | 3067 | { |
3068 | struct tlist *tmp; | |
1cae46be | 3069 | |
4e91a871 | 3070 | for (tmp = list; tmp; tmp = tmp->next) |
3071 | { | |
3072 | if (tmp->writer) | |
3073 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
3074 | } | |
3075 | } | |
3076 | ||
734c98be | 3077 | /* Return nonzero if X is a tree that can be verified by the sequence point |
4e91a871 | 3078 | warnings. */ |
3079 | static int | |
1cae46be | 3080 | warning_candidate_p (tree x) |
481c6ce6 | 3081 | { |
6ef8d12f | 3082 | if (DECL_P (x) && DECL_ARTIFICIAL (x)) |
3083 | return 0; | |
3084 | ||
027fc6ef | 3085 | if (TREE_CODE (x) == BLOCK) |
3086 | return 0; | |
3087 | ||
6ef8d12f | 3088 | /* VOID_TYPE_P (TREE_TYPE (x)) is workaround for cp/tree.c |
79973b57 | 3089 | (lvalue_p) crash on TRY/CATCH. */ |
6ef8d12f | 3090 | if (TREE_TYPE (x) == NULL_TREE || VOID_TYPE_P (TREE_TYPE (x))) |
3091 | return 0; | |
3092 | ||
3093 | if (!lvalue_p (x)) | |
3094 | return 0; | |
3095 | ||
3096 | /* No point to track non-const calls, they will never satisfy | |
3097 | operand_equal_p. */ | |
3098 | if (TREE_CODE (x) == CALL_EXPR && (call_expr_flags (x) & ECF_CONST) == 0) | |
3099 | return 0; | |
3100 | ||
3101 | if (TREE_CODE (x) == STRING_CST) | |
3102 | return 0; | |
3103 | ||
3104 | return 1; | |
79973b57 | 3105 | } |
3106 | ||
3107 | /* Return nonzero if X and Y appear to be the same candidate (or NULL) */ | |
3108 | static bool | |
3109 | candidate_equal_p (const_tree x, const_tree y) | |
3110 | { | |
3111 | return (x == y) || (x && y && operand_equal_p (x, y, 0)); | |
4e91a871 | 3112 | } |
481c6ce6 | 3113 | |
4e91a871 | 3114 | /* Walk the tree X, and record accesses to variables. If X is written by the |
3115 | parent tree, WRITER is the parent. | |
3116 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
3117 | expression or its only operand forces a sequence point, then everything up | |
3118 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
3119 | in PNO_SP. | |
3120 | Once we return, we will have emitted warnings if any subexpression before | |
3121 | such a sequence point could be undefined. On a higher level, however, the | |
3122 | sequence point may not be relevant, and we'll merge the two lists. | |
3123 | ||
3124 | Example: (b++, a) + b; | |
3125 | The call that processes the COMPOUND_EXPR will store the increment of B | |
3126 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
3127 | processes the PLUS_EXPR will need to merge the two lists so that | |
3128 | eventually, all accesses end up on the same list (and we'll warn about the | |
3129 | unordered subexpressions b++ and b. | |
3130 | ||
3131 | A note on merging. If we modify the former example so that our expression | |
3132 | becomes | |
3133 | (b++, b) + a | |
3134 | care must be taken not simply to add all three expressions into the final | |
3135 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
3136 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
3137 | way, so that no more than one access to B is recorded. */ | |
481c6ce6 | 3138 | |
4e91a871 | 3139 | static void |
1cae46be | 3140 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
3141 | tree writer) | |
4e91a871 | 3142 | { |
3143 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
3144 | enum tree_code code; | |
ce45a448 | 3145 | enum tree_code_class cl; |
481c6ce6 | 3146 | |
e5b75768 | 3147 | /* X may be NULL if it is the operand of an empty statement expression |
3148 | ({ }). */ | |
3149 | if (x == NULL) | |
3150 | return; | |
3151 | ||
4e91a871 | 3152 | restart: |
3153 | code = TREE_CODE (x); | |
e916c70c | 3154 | cl = TREE_CODE_CLASS (code); |
481c6ce6 | 3155 | |
4e91a871 | 3156 | if (warning_candidate_p (x)) |
79973b57 | 3157 | *pno_sp = new_tlist (*pno_sp, x, writer); |
4e91a871 | 3158 | |
3159 | switch (code) | |
3160 | { | |
67b28e3e | 3161 | case CONSTRUCTOR: |
8e71dad2 | 3162 | case SIZEOF_EXPR: |
67b28e3e | 3163 | return; |
3164 | ||
4e91a871 | 3165 | case COMPOUND_EXPR: |
3166 | case TRUTH_ANDIF_EXPR: | |
3167 | case TRUTH_ORIF_EXPR: | |
3168 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3169 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3170 | warn_for_collisions (tmp_nosp); | |
3171 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3172 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
3173 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
3174 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3175 | return; | |
3176 | ||
3177 | case COND_EXPR: | |
3178 | tmp_before = tmp_list2 = 0; | |
3179 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
3180 | warn_for_collisions (tmp_list2); | |
3181 | merge_tlist (pbefore_sp, tmp_before, 0); | |
312243bb | 3182 | merge_tlist (pbefore_sp, tmp_list2, 0); |
4e91a871 | 3183 | |
3184 | tmp_list3 = tmp_nosp = 0; | |
3185 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
3186 | warn_for_collisions (tmp_nosp); | |
3187 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3188 | ||
3189 | tmp_list3 = tmp_list2 = 0; | |
3190 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
3191 | warn_for_collisions (tmp_list2); | |
3192 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
3193 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
3194 | two first, to avoid warning for (a ? b++ : b++). */ | |
3195 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
3196 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3197 | return; | |
3198 | ||
481c6ce6 | 3199 | case PREDECREMENT_EXPR: |
3200 | case PREINCREMENT_EXPR: | |
3201 | case POSTDECREMENT_EXPR: | |
3202 | case POSTINCREMENT_EXPR: | |
4e91a871 | 3203 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
3204 | return; | |
3205 | ||
3206 | case MODIFY_EXPR: | |
3207 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
3208 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
3209 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
3210 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
3211 | in the RHS. Example: | |
3212 | *a = (a++, 2) | |
3213 | Despite the fact that the modification of "a" is in the before_sp | |
3214 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
3215 | We can handle this by adding the contents of tmp_list3 | |
3216 | to those of tmp_before, and redoing the collision warnings for that | |
3217 | list. */ | |
3218 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
3219 | warn_for_collisions (tmp_before); | |
3220 | /* Exclude the LHS itself here; we first have to merge it into the | |
3221 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
3222 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
3223 | as a write. */ | |
3224 | add_tlist (pno_sp, tmp_list3, x, 0); | |
3225 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
3226 | ||
3227 | merge_tlist (pbefore_sp, tmp_before, 0); | |
3228 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
3229 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
3230 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
3231 | return; | |
481c6ce6 | 3232 | |
3233 | case CALL_EXPR: | |
4e91a871 | 3234 | /* We need to warn about conflicts among arguments and conflicts between |
3235 | args and the function address. Side effects of the function address, | |
3236 | however, are not ordered by the sequence point of the call. */ | |
c2f47e15 | 3237 | { |
3238 | call_expr_arg_iterator iter; | |
3239 | tree arg; | |
48e1416a | 3240 | tmp_before = tmp_nosp = 0; |
c2f47e15 | 3241 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); |
3242 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
3243 | { | |
3244 | tmp_list2 = tmp_list3 = 0; | |
3245 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
3246 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
3247 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
3248 | } | |
3249 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
3250 | warn_for_collisions (tmp_before); | |
3251 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
3252 | return; | |
3253 | } | |
481c6ce6 | 3254 | |
3255 | case TREE_LIST: | |
3256 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
3257 | while (x) | |
3258 | { | |
4e91a871 | 3259 | tmp_before = tmp_nosp = 0; |
3260 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
3261 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3262 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
481c6ce6 | 3263 | x = TREE_CHAIN (x); |
3264 | } | |
4e91a871 | 3265 | return; |
481c6ce6 | 3266 | |
4e91a871 | 3267 | case SAVE_EXPR: |
3268 | { | |
3269 | struct tlist_cache *t; | |
3270 | for (t = save_expr_cache; t; t = t->next) | |
79973b57 | 3271 | if (candidate_equal_p (t->expr, x)) |
4e91a871 | 3272 | break; |
481c6ce6 | 3273 | |
84166705 | 3274 | if (!t) |
481c6ce6 | 3275 | { |
9318f22c | 3276 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
4e91a871 | 3277 | t->next = save_expr_cache; |
3278 | t->expr = x; | |
3279 | save_expr_cache = t; | |
3280 | ||
3281 | tmp_before = tmp_nosp = 0; | |
3282 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
3283 | warn_for_collisions (tmp_nosp); | |
3284 | ||
3285 | tmp_list3 = 0; | |
312243bb | 3286 | merge_tlist (&tmp_list3, tmp_nosp, 0); |
4e91a871 | 3287 | t->cache_before_sp = tmp_before; |
3288 | t->cache_after_sp = tmp_list3; | |
481c6ce6 | 3289 | } |
4e91a871 | 3290 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
3291 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
3292 | return; | |
3293 | } | |
481c6ce6 | 3294 | |
012916cb | 3295 | case ADDR_EXPR: |
3296 | x = TREE_OPERAND (x, 0); | |
3297 | if (DECL_P (x)) | |
3298 | return; | |
3299 | writer = 0; | |
3300 | goto restart; | |
3301 | ||
ce45a448 | 3302 | default: |
3303 | /* For other expressions, simply recurse on their operands. | |
a0c938f0 | 3304 | Manual tail recursion for unary expressions. |
ce45a448 | 3305 | Other non-expressions need not be processed. */ |
3306 | if (cl == tcc_unary) | |
3307 | { | |
ce45a448 | 3308 | x = TREE_OPERAND (x, 0); |
3309 | writer = 0; | |
3310 | goto restart; | |
3311 | } | |
3312 | else if (IS_EXPR_CODE_CLASS (cl)) | |
3313 | { | |
3314 | int lp; | |
c2f47e15 | 3315 | int max = TREE_OPERAND_LENGTH (x); |
ce45a448 | 3316 | for (lp = 0; lp < max; lp++) |
3317 | { | |
3318 | tmp_before = tmp_nosp = 0; | |
3319 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
3320 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
3321 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
3322 | } | |
3323 | } | |
3324 | return; | |
481c6ce6 | 3325 | } |
481c6ce6 | 3326 | } |
3327 | ||
974e2c0c | 3328 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
481c6ce6 | 3329 | points. */ |
3330 | ||
4b987fac | 3331 | DEBUG_FUNCTION void |
1cae46be | 3332 | verify_sequence_points (tree expr) |
481c6ce6 | 3333 | { |
4e91a871 | 3334 | struct tlist *before_sp = 0, *after_sp = 0; |
481c6ce6 | 3335 | |
4e91a871 | 3336 | warned_ids = 0; |
3337 | save_expr_cache = 0; | |
3338 | if (tlist_firstobj == 0) | |
481c6ce6 | 3339 | { |
4e91a871 | 3340 | gcc_obstack_init (&tlist_obstack); |
4fd61bc6 | 3341 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
481c6ce6 | 3342 | } |
3343 | ||
4e91a871 | 3344 | verify_tree (expr, &before_sp, &after_sp, 0); |
3345 | warn_for_collisions (after_sp); | |
3346 | obstack_free (&tlist_obstack, tlist_firstobj); | |
481c6ce6 | 3347 | } |
b0fc3e72 | 3348 | \f |
3349 | /* Validate the expression after `case' and apply default promotions. */ | |
3350 | ||
2ca392fd | 3351 | static tree |
2d2f6a15 | 3352 | check_case_value (location_t loc, tree value) |
b0fc3e72 | 3353 | { |
3354 | if (value == NULL_TREE) | |
3355 | return value; | |
3356 | ||
b96dc121 | 3357 | if (TREE_CODE (value) == INTEGER_CST) |
3358 | /* Promote char or short to int. */ | |
3359 | value = perform_integral_promotions (value); | |
3360 | else if (value != error_mark_node) | |
b0fc3e72 | 3361 | { |
2d2f6a15 | 3362 | error_at (loc, "case label does not reduce to an integer constant"); |
b0fc3e72 | 3363 | value = error_mark_node; |
3364 | } | |
b0fc3e72 | 3365 | |
6433f1c2 | 3366 | constant_expression_warning (value); |
3367 | ||
b0fc3e72 | 3368 | return value; |
3369 | } | |
3370 | \f | |
2ca392fd | 3371 | /* See if the case values LOW and HIGH are in the range of the original |
5c9dae64 | 3372 | type (i.e. before the default conversion to int) of the switch testing |
2ca392fd | 3373 | expression. |
3374 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
91275768 | 3375 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
2ca392fd | 3376 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
3377 | if the case is not a case range. | |
3378 | The caller has to make sure that we are not called with NULL for | |
5c9dae64 | 3379 | CASE_LOW_P (i.e. the default case). |
442e3cb9 | 3380 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
2ca392fd | 3381 | untouched) or false if the label is out of range. */ |
3382 | ||
3383 | static bool | |
f61a9bc2 | 3384 | check_case_bounds (location_t loc, tree type, tree orig_type, |
2ca392fd | 3385 | tree *case_low_p, tree *case_high_p) |
3386 | { | |
3387 | tree min_value, max_value; | |
3388 | tree case_low = *case_low_p; | |
3389 | tree case_high = case_high_p ? *case_high_p : case_low; | |
3390 | ||
3391 | /* If there was a problem with the original type, do nothing. */ | |
3392 | if (orig_type == error_mark_node) | |
3393 | return true; | |
3394 | ||
3395 | min_value = TYPE_MIN_VALUE (orig_type); | |
3396 | max_value = TYPE_MAX_VALUE (orig_type); | |
3397 | ||
3398 | /* Case label is less than minimum for type. */ | |
3399 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
3400 | && tree_int_cst_compare (case_high, min_value) < 0) | |
3401 | { | |
f61a9bc2 | 3402 | warning_at (loc, 0, "case label value is less than minimum value " |
3403 | "for type"); | |
2ca392fd | 3404 | return false; |
3405 | } | |
b27ac6b5 | 3406 | |
2ca392fd | 3407 | /* Case value is greater than maximum for type. */ |
3408 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
3409 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3410 | { | |
f61a9bc2 | 3411 | warning_at (loc, 0, "case label value exceeds maximum value for type"); |
2ca392fd | 3412 | return false; |
3413 | } | |
3414 | ||
3415 | /* Saturate lower case label value to minimum. */ | |
3416 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
3417 | && tree_int_cst_compare (case_low, min_value) < 0) | |
3418 | { | |
f61a9bc2 | 3419 | warning_at (loc, 0, "lower value in case label range" |
3420 | " less than minimum value for type"); | |
2ca392fd | 3421 | case_low = min_value; |
3422 | } | |
b27ac6b5 | 3423 | |
2ca392fd | 3424 | /* Saturate upper case label value to maximum. */ |
3425 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
3426 | && tree_int_cst_compare (case_high, max_value) > 0) | |
3427 | { | |
f61a9bc2 | 3428 | warning_at (loc, 0, "upper value in case label range" |
3429 | " exceeds maximum value for type"); | |
2ca392fd | 3430 | case_high = max_value; |
3431 | } | |
3432 | ||
3433 | if (*case_low_p != case_low) | |
3434 | *case_low_p = convert (type, case_low); | |
3435 | if (case_high_p && *case_high_p != case_high) | |
3436 | *case_high_p = convert (type, case_high); | |
3437 | ||
3438 | return true; | |
3439 | } | |
3440 | \f | |
b0fc3e72 | 3441 | /* Return an integer type with BITS bits of precision, |
3442 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
3443 | ||
3444 | tree | |
1cae46be | 3445 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b0fc3e72 | 3446 | { |
46375237 | 3447 | if (bits == TYPE_PRECISION (integer_type_node)) |
3448 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3449 | ||
bacde65a | 3450 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b0fc3e72 | 3451 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
3452 | ||
bacde65a | 3453 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b0fc3e72 | 3454 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
3455 | ||
bacde65a | 3456 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b0fc3e72 | 3457 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
3458 | ||
bacde65a | 3459 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b0fc3e72 | 3460 | return (unsignedp ? long_long_unsigned_type_node |
3461 | : long_long_integer_type_node); | |
3462 | ||
6388cfe2 | 3463 | if (int128_integer_type_node |
3464 | && bits == TYPE_PRECISION (int128_integer_type_node)) | |
3465 | return (unsignedp ? int128_unsigned_type_node | |
3466 | : int128_integer_type_node); | |
3467 | ||
f57fa2ea | 3468 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
3469 | return (unsignedp ? widest_unsigned_literal_type_node | |
3470 | : widest_integer_literal_type_node); | |
3471 | ||
bacde65a | 3472 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
3473 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
3474 | ||
3475 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
3476 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
3477 | ||
3478 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
3479 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
3480 | ||
3481 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
3482 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
3483 | ||
b0fc3e72 | 3484 | return 0; |
3485 | } | |
3486 | ||
9421ebb9 | 3487 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
3488 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
3489 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
3490 | ||
3491 | tree | |
3492 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
3493 | int unsignedp, int satp) | |
3494 | { | |
3495 | enum machine_mode mode; | |
3496 | if (ibit == 0) | |
3497 | mode = unsignedp ? UQQmode : QQmode; | |
3498 | else | |
3499 | mode = unsignedp ? UHAmode : HAmode; | |
3500 | ||
3501 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
3502 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
3503 | break; | |
3504 | ||
3505 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
3506 | { | |
3507 | sorry ("GCC cannot support operators with integer types and " | |
3508 | "fixed-point types that have too many integral and " | |
3509 | "fractional bits together"); | |
3510 | return 0; | |
3511 | } | |
3512 | ||
3513 | return c_common_type_for_mode (mode, satp); | |
3514 | } | |
3515 | ||
5b247e9f | 3516 | /* Used for communication between c_common_type_for_mode and |
3517 | c_register_builtin_type. */ | |
c1917557 | 3518 | tree registered_builtin_types; |
5b247e9f | 3519 | |
b0fc3e72 | 3520 | /* Return a data type that has machine mode MODE. |
3521 | If the mode is an integer, | |
9421ebb9 | 3522 | then UNSIGNEDP selects between signed and unsigned types. |
3523 | If the mode is a fixed-point mode, | |
3524 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b0fc3e72 | 3525 | |
3526 | tree | |
1cae46be | 3527 | c_common_type_for_mode (enum machine_mode mode, int unsignedp) |
b0fc3e72 | 3528 | { |
5b247e9f | 3529 | tree t; |
3530 | ||
46375237 | 3531 | if (mode == TYPE_MODE (integer_type_node)) |
3532 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3533 | ||
b0fc3e72 | 3534 | if (mode == TYPE_MODE (signed_char_type_node)) |
3535 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3536 | ||
3537 | if (mode == TYPE_MODE (short_integer_type_node)) | |
3538 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3539 | ||
b0fc3e72 | 3540 | if (mode == TYPE_MODE (long_integer_type_node)) |
3541 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3542 | ||
3543 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
3544 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
3545 | ||
6388cfe2 | 3546 | if (int128_integer_type_node |
3547 | && mode == TYPE_MODE (int128_integer_type_node)) | |
3548 | return unsignedp ? int128_unsigned_type_node : int128_integer_type_node; | |
3549 | ||
f57fa2ea | 3550 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
44e9fa65 | 3551 | return unsignedp ? widest_unsigned_literal_type_node |
4ee9c684 | 3552 | : widest_integer_literal_type_node; |
f57fa2ea | 3553 | |
88ae7f04 | 3554 | if (mode == QImode) |
bacde65a | 3555 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
3556 | ||
88ae7f04 | 3557 | if (mode == HImode) |
bacde65a | 3558 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
3559 | ||
88ae7f04 | 3560 | if (mode == SImode) |
bacde65a | 3561 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
3562 | ||
88ae7f04 | 3563 | if (mode == DImode) |
bacde65a | 3564 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
ab2c1de8 | 3565 | |
cc1cc1c7 | 3566 | #if HOST_BITS_PER_WIDE_INT >= 64 |
6274009c | 3567 | if (mode == TYPE_MODE (intTI_type_node)) |
3568 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
cc1cc1c7 | 3569 | #endif |
6274009c | 3570 | |
b0fc3e72 | 3571 | if (mode == TYPE_MODE (float_type_node)) |
3572 | return float_type_node; | |
3573 | ||
3574 | if (mode == TYPE_MODE (double_type_node)) | |
3575 | return double_type_node; | |
3576 | ||
3577 | if (mode == TYPE_MODE (long_double_type_node)) | |
3578 | return long_double_type_node; | |
3579 | ||
545c2bde | 3580 | if (mode == TYPE_MODE (void_type_node)) |
3581 | return void_type_node; | |
b27ac6b5 | 3582 | |
b0fc3e72 | 3583 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
61b9b73c | 3584 | return (unsignedp |
3585 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3586 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 3587 | |
3588 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
61b9b73c | 3589 | return (unsignedp |
3590 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
3591 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 3592 | |
0dfc45b5 | 3593 | if (COMPLEX_MODE_P (mode)) |
3594 | { | |
3595 | enum machine_mode inner_mode; | |
3596 | tree inner_type; | |
3597 | ||
3598 | if (mode == TYPE_MODE (complex_float_type_node)) | |
3599 | return complex_float_type_node; | |
3600 | if (mode == TYPE_MODE (complex_double_type_node)) | |
3601 | return complex_double_type_node; | |
3602 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
3603 | return complex_long_double_type_node; | |
3604 | ||
3605 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
3606 | return complex_integer_type_node; | |
3607 | ||
3608 | inner_mode = GET_MODE_INNER (mode); | |
3609 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
3610 | if (inner_type != NULL_TREE) | |
3611 | return build_complex_type (inner_type); | |
3612 | } | |
3613 | else if (VECTOR_MODE_P (mode)) | |
4917c376 | 3614 | { |
3615 | enum machine_mode inner_mode = GET_MODE_INNER (mode); | |
3616 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
3617 | if (inner_type != NULL_TREE) | |
3618 | return build_vector_type_for_mode (inner_type, mode); | |
88ae7f04 | 3619 | } |
e2ea7e3a | 3620 | |
c4503c0a | 3621 | if (mode == TYPE_MODE (dfloat32_type_node)) |
3622 | return dfloat32_type_node; | |
3623 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
3624 | return dfloat64_type_node; | |
3625 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
3626 | return dfloat128_type_node; | |
3627 | ||
9421ebb9 | 3628 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
3629 | { | |
3630 | if (mode == TYPE_MODE (short_fract_type_node)) | |
3631 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
3632 | if (mode == TYPE_MODE (fract_type_node)) | |
3633 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
3634 | if (mode == TYPE_MODE (long_fract_type_node)) | |
3635 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
3636 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
3637 | return unsignedp ? sat_long_long_fract_type_node | |
3638 | : long_long_fract_type_node; | |
3639 | ||
3640 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
3641 | return unsignedp ? sat_unsigned_short_fract_type_node | |
3642 | : unsigned_short_fract_type_node; | |
3643 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
3644 | return unsignedp ? sat_unsigned_fract_type_node | |
3645 | : unsigned_fract_type_node; | |
3646 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
3647 | return unsignedp ? sat_unsigned_long_fract_type_node | |
3648 | : unsigned_long_fract_type_node; | |
3649 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
3650 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
3651 | : unsigned_long_long_fract_type_node; | |
3652 | ||
3653 | if (mode == TYPE_MODE (short_accum_type_node)) | |
3654 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
3655 | if (mode == TYPE_MODE (accum_type_node)) | |
3656 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
3657 | if (mode == TYPE_MODE (long_accum_type_node)) | |
3658 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
3659 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
3660 | return unsignedp ? sat_long_long_accum_type_node | |
3661 | : long_long_accum_type_node; | |
3662 | ||
3663 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
3664 | return unsignedp ? sat_unsigned_short_accum_type_node | |
3665 | : unsigned_short_accum_type_node; | |
3666 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
3667 | return unsignedp ? sat_unsigned_accum_type_node | |
3668 | : unsigned_accum_type_node; | |
3669 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
3670 | return unsignedp ? sat_unsigned_long_accum_type_node | |
3671 | : unsigned_long_accum_type_node; | |
3672 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
3673 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
3674 | : unsigned_long_long_accum_type_node; | |
3675 | ||
3676 | if (mode == QQmode) | |
3677 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
3678 | if (mode == HQmode) | |
3679 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
3680 | if (mode == SQmode) | |
3681 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
3682 | if (mode == DQmode) | |
3683 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
3684 | if (mode == TQmode) | |
3685 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
3686 | ||
3687 | if (mode == UQQmode) | |
3688 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
3689 | if (mode == UHQmode) | |
3690 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
3691 | if (mode == USQmode) | |
3692 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
3693 | if (mode == UDQmode) | |
3694 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
3695 | if (mode == UTQmode) | |
3696 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
3697 | ||
3698 | if (mode == HAmode) | |
3699 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
3700 | if (mode == SAmode) | |
3701 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
3702 | if (mode == DAmode) | |
3703 | return unsignedp ? sat_da_type_node : da_type_node; | |
3704 | if (mode == TAmode) | |
3705 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
3706 | ||
3707 | if (mode == UHAmode) | |
3708 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
3709 | if (mode == USAmode) | |
3710 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
3711 | if (mode == UDAmode) | |
3712 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
3713 | if (mode == UTAmode) | |
3714 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
3715 | } | |
3716 | ||
5b247e9f | 3717 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
baec58e1 | 3718 | if (TYPE_MODE (TREE_VALUE (t)) == mode |
3719 | && !!unsignedp == !!TYPE_UNSIGNED (TREE_VALUE (t))) | |
5b247e9f | 3720 | return TREE_VALUE (t); |
3721 | ||
b0fc3e72 | 3722 | return 0; |
3723 | } | |
20d39783 | 3724 | |
11773141 | 3725 | tree |
3726 | c_common_unsigned_type (tree type) | |
3727 | { | |
3728 | return c_common_signed_or_unsigned_type (1, type); | |
3729 | } | |
3730 | ||
20d39783 | 3731 | /* Return a signed type the same as TYPE in other respects. */ |
3732 | ||
3733 | tree | |
1cae46be | 3734 | c_common_signed_type (tree type) |
20d39783 | 3735 | { |
4070745f | 3736 | return c_common_signed_or_unsigned_type (0, type); |
20d39783 | 3737 | } |
3738 | ||
3739 | /* Return a type the same as TYPE except unsigned or | |
3740 | signed according to UNSIGNEDP. */ | |
3741 | ||
3742 | tree | |
1cae46be | 3743 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
20d39783 | 3744 | { |
7a91101f | 3745 | tree type1; |
20d39783 | 3746 | |
7a91101f | 3747 | /* This block of code emulates the behavior of the old |
3748 | c_common_unsigned_type. In particular, it returns | |
3749 | long_unsigned_type_node if passed a long, even when a int would | |
3750 | have the same size. This is necessary for warnings to work | |
3751 | correctly in archs where sizeof(int) == sizeof(long) */ | |
3752 | ||
3753 | type1 = TYPE_MAIN_VARIANT (type); | |
3754 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
3755 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3756 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
3757 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3758 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
3759 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3760 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
3761 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3762 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
3763 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
6388cfe2 | 3764 | if (int128_integer_type_node |
3765 | && (type1 == int128_integer_type_node | |
3766 | || type1 == int128_unsigned_type_node)) | |
3767 | return unsignedp ? int128_unsigned_type_node : int128_integer_type_node; | |
7a91101f | 3768 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) |
3769 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
3770 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
3771 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
3772 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
3773 | #endif | |
3774 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
3775 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
3776 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
3777 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
3778 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
3779 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
3780 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
3781 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
3782 | ||
9f92e1a2 | 3783 | #define C_COMMON_FIXED_TYPES(NAME) \ |
3784 | if (type1 == short_ ## NAME ## _type_node \ | |
3785 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
3786 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
3787 | : short_ ## NAME ## _type_node; \ | |
3788 | if (type1 == NAME ## _type_node \ | |
3789 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
3790 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
3791 | : NAME ## _type_node; \ | |
3792 | if (type1 == long_ ## NAME ## _type_node \ | |
3793 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
3794 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
3795 | : long_ ## NAME ## _type_node; \ | |
3796 | if (type1 == long_long_ ## NAME ## _type_node \ | |
3797 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
3798 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
3799 | : long_long_ ## NAME ## _type_node; | |
3800 | ||
3801 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
3802 | if (type1 == NAME ## _type_node \ | |
3803 | || type1 == u ## NAME ## _type_node) \ | |
3804 | return unsignedp ? u ## NAME ## _type_node \ | |
3805 | : NAME ## _type_node; | |
3806 | ||
3807 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
3808 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
3809 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
3810 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
3811 | : sat_ ## short_ ## NAME ## _type_node; \ | |
3812 | if (type1 == sat_ ## NAME ## _type_node \ | |
3813 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
3814 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
3815 | : sat_ ## NAME ## _type_node; \ | |
3816 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
3817 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
3818 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
3819 | : sat_ ## long_ ## NAME ## _type_node; \ | |
3820 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
3821 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
3822 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
3823 | : sat_ ## long_long_ ## NAME ## _type_node; | |
3824 | ||
3825 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
3826 | if (type1 == sat_ ## NAME ## _type_node \ | |
3827 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
3828 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
3829 | : sat_ ## NAME ## _type_node; | |
3830 | ||
3831 | C_COMMON_FIXED_TYPES (fract); | |
3832 | C_COMMON_FIXED_TYPES_SAT (fract); | |
3833 | C_COMMON_FIXED_TYPES (accum); | |
3834 | C_COMMON_FIXED_TYPES_SAT (accum); | |
3835 | ||
3836 | C_COMMON_FIXED_MODE_TYPES (qq); | |
3837 | C_COMMON_FIXED_MODE_TYPES (hq); | |
3838 | C_COMMON_FIXED_MODE_TYPES (sq); | |
3839 | C_COMMON_FIXED_MODE_TYPES (dq); | |
3840 | C_COMMON_FIXED_MODE_TYPES (tq); | |
3841 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
3842 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
3843 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
3844 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
3845 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
3846 | C_COMMON_FIXED_MODE_TYPES (ha); | |
3847 | C_COMMON_FIXED_MODE_TYPES (sa); | |
3848 | C_COMMON_FIXED_MODE_TYPES (da); | |
3849 | C_COMMON_FIXED_MODE_TYPES (ta); | |
3850 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
3851 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
3852 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
3853 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
9421ebb9 | 3854 | |
4f7f7efd | 3855 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
3856 | the precision; they have precision set to match their range, but | |
3857 | may use a wider mode to match an ABI. If we change modes, we may | |
3858 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
3859 | the precision as well, so as to yield correct results for | |
3860 | bit-field types. C++ does not have these separate bit-field | |
3861 | types, and producing a signed or unsigned variant of an | |
3862 | ENUMERAL_TYPE may cause other problems as well. */ | |
3863 | ||
ac265864 | 3864 | if (!INTEGRAL_TYPE_P (type) |
3865 | || TYPE_UNSIGNED (type) == unsignedp) | |
3866 | return type; | |
3867 | ||
4f7f7efd | 3868 | #define TYPE_OK(node) \ |
3869 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
0c4abe5b | 3870 | && TYPE_PRECISION (type) == TYPE_PRECISION (node)) |
4f7f7efd | 3871 | if (TYPE_OK (signed_char_type_node)) |
20d39783 | 3872 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
4f7f7efd | 3873 | if (TYPE_OK (integer_type_node)) |
20d39783 | 3874 | return unsignedp ? unsigned_type_node : integer_type_node; |
4f7f7efd | 3875 | if (TYPE_OK (short_integer_type_node)) |
20d39783 | 3876 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
4f7f7efd | 3877 | if (TYPE_OK (long_integer_type_node)) |
20d39783 | 3878 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
4f7f7efd | 3879 | if (TYPE_OK (long_long_integer_type_node)) |
20d39783 | 3880 | return (unsignedp ? long_long_unsigned_type_node |
3881 | : long_long_integer_type_node); | |
6388cfe2 | 3882 | if (int128_integer_type_node && TYPE_OK (int128_integer_type_node)) |
3883 | return (unsignedp ? int128_unsigned_type_node | |
3884 | : int128_integer_type_node); | |
4f7f7efd | 3885 | if (TYPE_OK (widest_integer_literal_type_node)) |
20d39783 | 3886 | return (unsignedp ? widest_unsigned_literal_type_node |
3887 | : widest_integer_literal_type_node); | |
ef11801e | 3888 | |
3889 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
4f7f7efd | 3890 | if (TYPE_OK (intTI_type_node)) |
ef11801e | 3891 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
3892 | #endif | |
4f7f7efd | 3893 | if (TYPE_OK (intDI_type_node)) |
ef11801e | 3894 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
4f7f7efd | 3895 | if (TYPE_OK (intSI_type_node)) |
ef11801e | 3896 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
4f7f7efd | 3897 | if (TYPE_OK (intHI_type_node)) |
ef11801e | 3898 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
4f7f7efd | 3899 | if (TYPE_OK (intQI_type_node)) |
ef11801e | 3900 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
4f7f7efd | 3901 | #undef TYPE_OK |
ef11801e | 3902 | |
0c4abe5b | 3903 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); |
20d39783 | 3904 | } |
b268e47e | 3905 | |
c0e47fd4 | 3906 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
3907 | ||
3908 | tree | |
3909 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
3910 | { | |
3911 | /* Extended integer types of the same width as a standard type have | |
3912 | lesser rank, so those of the same width as int promote to int or | |
3913 | unsigned int and are valid for printf formats expecting int or | |
3914 | unsigned int. To avoid such special cases, avoid creating | |
3915 | extended integer types for bit-fields if a standard integer type | |
3916 | is available. */ | |
3917 | if (width == TYPE_PRECISION (integer_type_node)) | |
3918 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3919 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
3920 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3921 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
3922 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3923 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
3924 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3925 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
3926 | return (unsignedp ? long_long_unsigned_type_node | |
3927 | : long_long_integer_type_node); | |
6388cfe2 | 3928 | if (int128_integer_type_node |
3929 | && width == TYPE_PRECISION (int128_integer_type_node)) | |
3930 | return (unsignedp ? int128_unsigned_type_node | |
3931 | : int128_integer_type_node); | |
c0e47fd4 | 3932 | return build_nonstandard_integer_type (width, unsignedp); |
3933 | } | |
3934 | ||
b268e47e | 3935 | /* The C version of the register_builtin_type langhook. */ |
3936 | ||
3937 | void | |
3938 | c_register_builtin_type (tree type, const char* name) | |
3939 | { | |
3940 | tree decl; | |
3941 | ||
e60a6f7b | 3942 | decl = build_decl (UNKNOWN_LOCATION, |
3943 | TYPE_DECL, get_identifier (name), type); | |
b268e47e | 3944 | DECL_ARTIFICIAL (decl) = 1; |
3945 | if (!TYPE_NAME (type)) | |
3946 | TYPE_NAME (type) = decl; | |
3947 | pushdecl (decl); | |
5b247e9f | 3948 | |
3949 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
b268e47e | 3950 | } |
a9b9d10c | 3951 | \f |
aff9e656 | 3952 | /* Print an error message for invalid operands to arith operation |
8e70fb09 | 3953 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. |
3954 | LOCATION is the location of the message. */ | |
b0fc3e72 | 3955 | |
3956 | void | |
8e70fb09 | 3957 | binary_op_error (location_t location, enum tree_code code, |
3958 | tree type0, tree type1) | |
b0fc3e72 | 3959 | { |
19cb6b50 | 3960 | const char *opname; |
f03946e4 | 3961 | |
b0fc3e72 | 3962 | switch (code) |
3963 | { | |
b0fc3e72 | 3964 | case PLUS_EXPR: |
3965 | opname = "+"; break; | |
3966 | case MINUS_EXPR: | |
3967 | opname = "-"; break; | |
3968 | case MULT_EXPR: | |
3969 | opname = "*"; break; | |
3970 | case MAX_EXPR: | |
3971 | opname = "max"; break; | |
3972 | case MIN_EXPR: | |
3973 | opname = "min"; break; | |
3974 | case EQ_EXPR: | |
3975 | opname = "=="; break; | |
3976 | case NE_EXPR: | |
3977 | opname = "!="; break; | |
3978 | case LE_EXPR: | |
3979 | opname = "<="; break; | |
3980 | case GE_EXPR: | |
3981 | opname = ">="; break; | |
3982 | case LT_EXPR: | |
3983 | opname = "<"; break; | |
3984 | case GT_EXPR: | |
3985 | opname = ">"; break; | |
3986 | case LSHIFT_EXPR: | |
3987 | opname = "<<"; break; | |
3988 | case RSHIFT_EXPR: | |
3989 | opname = ">>"; break; | |
3990 | case TRUNC_MOD_EXPR: | |
66618a1e | 3991 | case FLOOR_MOD_EXPR: |
b0fc3e72 | 3992 | opname = "%"; break; |
3993 | case TRUNC_DIV_EXPR: | |
66618a1e | 3994 | case FLOOR_DIV_EXPR: |
b0fc3e72 | 3995 | opname = "/"; break; |
3996 | case BIT_AND_EXPR: | |
3997 | opname = "&"; break; | |
3998 | case BIT_IOR_EXPR: | |
3999 | opname = "|"; break; | |
4000 | case TRUTH_ANDIF_EXPR: | |
4001 | opname = "&&"; break; | |
4002 | case TRUTH_ORIF_EXPR: | |
4003 | opname = "||"; break; | |
4004 | case BIT_XOR_EXPR: | |
4005 | opname = "^"; break; | |
31f820d2 | 4006 | default: |
315ba355 | 4007 | gcc_unreachable (); |
b0fc3e72 | 4008 | } |
8e70fb09 | 4009 | error_at (location, |
4010 | "invalid operands to binary %s (have %qT and %qT)", opname, | |
4011 | type0, type1); | |
b0fc3e72 | 4012 | } |
4013 | \f | |
03fe1dc2 | 4014 | /* Given an expression as a tree, return its original type. Do this |
4015 | by stripping any conversion that preserves the sign and precision. */ | |
4016 | static tree | |
4017 | expr_original_type (tree expr) | |
4018 | { | |
4019 | STRIP_SIGN_NOPS (expr); | |
4020 | return TREE_TYPE (expr); | |
4021 | } | |
4022 | ||
b0fc3e72 | 4023 | /* Subroutine of build_binary_op, used for comparison operations. |
4024 | See if the operands have both been converted from subword integer types | |
4025 | and, if so, perhaps change them both back to their original type. | |
5b511807 | 4026 | This function is also responsible for converting the two operands |
4027 | to the proper common type for comparison. | |
b0fc3e72 | 4028 | |
4029 | The arguments of this function are all pointers to local variables | |
4030 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
4031 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
4032 | ||
2623625f | 4033 | LOC is the location of the comparison. |
4034 | ||
b0fc3e72 | 4035 | If this function returns nonzero, it means that the comparison has |
4036 | a constant value. What this function returns is an expression for | |
4037 | that value. */ | |
4038 | ||
4039 | tree | |
2623625f | 4040 | shorten_compare (location_t loc, tree *op0_ptr, tree *op1_ptr, |
4041 | tree *restype_ptr, enum tree_code *rescode_ptr) | |
b0fc3e72 | 4042 | { |
19cb6b50 | 4043 | tree type; |
b0fc3e72 | 4044 | tree op0 = *op0_ptr; |
4045 | tree op1 = *op1_ptr; | |
4046 | int unsignedp0, unsignedp1; | |
4047 | int real1, real2; | |
4048 | tree primop0, primop1; | |
4049 | enum tree_code code = *rescode_ptr; | |
4050 | ||
4051 | /* Throw away any conversions to wider types | |
4052 | already present in the operands. */ | |
4053 | ||
7f506bca | 4054 | primop0 = c_common_get_narrower (op0, &unsignedp0); |
4055 | primop1 = c_common_get_narrower (op1, &unsignedp1); | |
b0fc3e72 | 4056 | |
119d06b2 | 4057 | /* If primopN is first sign-extended from primopN's precision to opN's |
4058 | precision, then zero-extended from opN's precision to | |
4059 | *restype_ptr precision, shortenings might be invalid. */ | |
4060 | if (TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (TREE_TYPE (op0)) | |
4061 | && TYPE_PRECISION (TREE_TYPE (op0)) < TYPE_PRECISION (*restype_ptr) | |
4062 | && !unsignedp0 | |
4063 | && TYPE_UNSIGNED (TREE_TYPE (op0))) | |
4064 | primop0 = op0; | |
4065 | if (TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (TREE_TYPE (op1)) | |
4066 | && TYPE_PRECISION (TREE_TYPE (op1)) < TYPE_PRECISION (*restype_ptr) | |
4067 | && !unsignedp1 | |
4068 | && TYPE_UNSIGNED (TREE_TYPE (op1))) | |
4069 | primop1 = op1; | |
4070 | ||
b0fc3e72 | 4071 | /* Handle the case that OP0 does not *contain* a conversion |
4072 | but it *requires* conversion to FINAL_TYPE. */ | |
4073 | ||
4074 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
78a8ed03 | 4075 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b0fc3e72 | 4076 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
78a8ed03 | 4077 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b0fc3e72 | 4078 | |
4079 | /* If one of the operands must be floated, we cannot optimize. */ | |
4080 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
4081 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
ab2c1de8 | 4082 | |
b0fc3e72 | 4083 | /* If first arg is constant, swap the args (changing operation |
2bd278cc | 4084 | so value is preserved), for canonicalization. Don't do this if |
4085 | the second arg is 0. */ | |
b0fc3e72 | 4086 | |
2bd278cc | 4087 | if (TREE_CONSTANT (primop0) |
9421ebb9 | 4088 | && !integer_zerop (primop1) && !real_zerop (primop1) |
4089 | && !fixed_zerop (primop1)) | |
b0fc3e72 | 4090 | { |
19cb6b50 | 4091 | tree tem = primop0; |
4092 | int temi = unsignedp0; | |
b0fc3e72 | 4093 | primop0 = primop1; |
4094 | primop1 = tem; | |
4095 | tem = op0; | |
4096 | op0 = op1; | |
4097 | op1 = tem; | |
4098 | *op0_ptr = op0; | |
4099 | *op1_ptr = op1; | |
4100 | unsignedp0 = unsignedp1; | |
4101 | unsignedp1 = temi; | |
4102 | temi = real1; | |
4103 | real1 = real2; | |
4104 | real2 = temi; | |
4105 | ||
4106 | switch (code) | |
4107 | { | |
4108 | case LT_EXPR: | |
4109 | code = GT_EXPR; | |
4110 | break; | |
4111 | case GT_EXPR: | |
4112 | code = LT_EXPR; | |
4113 | break; | |
4114 | case LE_EXPR: | |
4115 | code = GE_EXPR; | |
4116 | break; | |
4117 | case GE_EXPR: | |
4118 | code = LE_EXPR; | |
4119 | break; | |
31f820d2 | 4120 | default: |
4121 | break; | |
b0fc3e72 | 4122 | } |
4123 | *rescode_ptr = code; | |
4124 | } | |
4125 | ||
4126 | /* If comparing an integer against a constant more bits wide, | |
4127 | maybe we can deduce a value of 1 or 0 independent of the data. | |
4128 | Or else truncate the constant now | |
4129 | rather than extend the variable at run time. | |
4130 | ||
4131 | This is only interesting if the constant is the wider arg. | |
4132 | Also, it is not safe if the constant is unsigned and the | |
4133 | variable arg is signed, since in this case the variable | |
4134 | would be sign-extended and then regarded as unsigned. | |
4135 | Our technique fails in this case because the lowest/highest | |
4136 | possible unsigned results don't follow naturally from the | |
4137 | lowest/highest possible values of the variable operand. | |
4138 | For just EQ_EXPR and NE_EXPR there is another technique that | |
4139 | could be used: see if the constant can be faithfully represented | |
4140 | in the other operand's type, by truncating it and reextending it | |
4141 | and see if that preserves the constant's value. */ | |
4142 | ||
4143 | if (!real1 && !real2 | |
9421ebb9 | 4144 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b0fc3e72 | 4145 | && TREE_CODE (primop1) == INTEGER_CST |
4146 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
4147 | { | |
4148 | int min_gt, max_gt, min_lt, max_lt; | |
4149 | tree maxval, minval; | |
4150 | /* 1 if comparison is nominally unsigned. */ | |
78a8ed03 | 4151 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b0fc3e72 | 4152 | tree val; |
4153 | ||
4070745f | 4154 | type = c_common_signed_or_unsigned_type (unsignedp0, |
4155 | TREE_TYPE (primop0)); | |
cda09c61 | 4156 | |
b0fc3e72 | 4157 | maxval = TYPE_MAX_VALUE (type); |
4158 | minval = TYPE_MIN_VALUE (type); | |
4159 | ||
4160 | if (unsignedp && !unsignedp0) | |
4070745f | 4161 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b0fc3e72 | 4162 | |
4163 | if (TREE_TYPE (primop1) != *restype_ptr) | |
18dbec6f | 4164 | { |
9a5e8086 | 4165 | /* Convert primop1 to target type, but do not introduce |
4166 | additional overflow. We know primop1 is an int_cst. */ | |
e913b5cd | 4167 | primop1 = force_fit_type (*restype_ptr, |
796b6678 | 4168 | wide_int::from |
4169 | (primop1, | |
4170 | TYPE_PRECISION (*restype_ptr), | |
4171 | TYPE_SIGN (TREE_TYPE (primop1))), | |
e913b5cd | 4172 | 0, TREE_OVERFLOW (primop1)); |
18dbec6f | 4173 | } |
b0fc3e72 | 4174 | if (type != *restype_ptr) |
4175 | { | |
4176 | minval = convert (*restype_ptr, minval); | |
4177 | maxval = convert (*restype_ptr, maxval); | |
4178 | } | |
4179 | ||
d99d10ca | 4180 | min_gt = tree_int_cst_lt (primop1, minval); |
4181 | max_gt = tree_int_cst_lt (primop1, maxval); | |
4182 | min_lt = tree_int_cst_lt (minval, primop1); | |
4183 | max_lt = tree_int_cst_lt (maxval, primop1); | |
b0fc3e72 | 4184 | |
4185 | val = 0; | |
4186 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
4187 | if (code == NE_EXPR) | |
4188 | { | |
4189 | if (max_lt || min_gt) | |
3c2239cf | 4190 | val = truthvalue_true_node; |
b0fc3e72 | 4191 | } |
4192 | else if (code == EQ_EXPR) | |
4193 | { | |
4194 | if (max_lt || min_gt) | |
3c2239cf | 4195 | val = truthvalue_false_node; |
b0fc3e72 | 4196 | } |
4197 | else if (code == LT_EXPR) | |
4198 | { | |
4199 | if (max_lt) | |
3c2239cf | 4200 | val = truthvalue_true_node; |
b0fc3e72 | 4201 | if (!min_lt) |
3c2239cf | 4202 | val = truthvalue_false_node; |
b0fc3e72 | 4203 | } |
4204 | else if (code == GT_EXPR) | |
4205 | { | |
4206 | if (min_gt) | |
3c2239cf | 4207 | val = truthvalue_true_node; |
b0fc3e72 | 4208 | if (!max_gt) |
3c2239cf | 4209 | val = truthvalue_false_node; |
b0fc3e72 | 4210 | } |
4211 | else if (code == LE_EXPR) | |
4212 | { | |
4213 | if (!max_gt) | |
3c2239cf | 4214 | val = truthvalue_true_node; |
b0fc3e72 | 4215 | if (min_gt) |
3c2239cf | 4216 | val = truthvalue_false_node; |
b0fc3e72 | 4217 | } |
4218 | else if (code == GE_EXPR) | |
4219 | { | |
4220 | if (!min_lt) | |
3c2239cf | 4221 | val = truthvalue_true_node; |
b0fc3e72 | 4222 | if (max_lt) |
3c2239cf | 4223 | val = truthvalue_false_node; |
b0fc3e72 | 4224 | } |
4225 | ||
4226 | /* If primop0 was sign-extended and unsigned comparison specd, | |
4227 | we did a signed comparison above using the signed type bounds. | |
4228 | But the comparison we output must be unsigned. | |
4229 | ||
4230 | Also, for inequalities, VAL is no good; but if the signed | |
4231 | comparison had *any* fixed result, it follows that the | |
4232 | unsigned comparison just tests the sign in reverse | |
4233 | (positive values are LE, negative ones GE). | |
4234 | So we can generate an unsigned comparison | |
4235 | against an extreme value of the signed type. */ | |
4236 | ||
4237 | if (unsignedp && !unsignedp0) | |
4238 | { | |
4239 | if (val != 0) | |
4240 | switch (code) | |
4241 | { | |
4242 | case LT_EXPR: | |
4243 | case GE_EXPR: | |
4244 | primop1 = TYPE_MIN_VALUE (type); | |
4245 | val = 0; | |
4246 | break; | |
4247 | ||
4248 | case LE_EXPR: | |
4249 | case GT_EXPR: | |
4250 | primop1 = TYPE_MAX_VALUE (type); | |
4251 | val = 0; | |
4252 | break; | |
31f820d2 | 4253 | |
4254 | default: | |
4255 | break; | |
b0fc3e72 | 4256 | } |
11773141 | 4257 | type = c_common_unsigned_type (type); |
b0fc3e72 | 4258 | } |
4259 | ||
734ec290 | 4260 | if (TREE_CODE (primop0) != INTEGER_CST) |
b0fc3e72 | 4261 | { |
3c2239cf | 4262 | if (val == truthvalue_false_node) |
03fe1dc2 | 4263 | warning_at (loc, OPT_Wtype_limits, |
4264 | "comparison is always false due to limited range of data type"); | |
3c2239cf | 4265 | if (val == truthvalue_true_node) |
03fe1dc2 | 4266 | warning_at (loc, OPT_Wtype_limits, |
4267 | "comparison is always true due to limited range of data type"); | |
b0fc3e72 | 4268 | } |
4269 | ||
4270 | if (val != 0) | |
4271 | { | |
4272 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4273 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 4274 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b0fc3e72 | 4275 | return val; |
4276 | } | |
4277 | ||
4278 | /* Value is not predetermined, but do the comparison | |
4279 | in the type of the operand that is not constant. | |
4280 | TYPE is already properly set. */ | |
4281 | } | |
c4503c0a | 4282 | |
4283 | /* If either arg is decimal float and the other is float, find the | |
4284 | proper common type to use for comparison. */ | |
4285 | else if (real1 && real2 | |
4286 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
4287 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
4288 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4289 | ||
b0fc3e72 | 4290 | else if (real1 && real2 |
2203bd5c | 4291 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
4292 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b0fc3e72 | 4293 | type = TREE_TYPE (primop0); |
4294 | ||
4295 | /* If args' natural types are both narrower than nominal type | |
4296 | and both extend in the same manner, compare them | |
4297 | in the type of the wider arg. | |
4298 | Otherwise must actually extend both to the nominal | |
4299 | common type lest different ways of extending | |
4300 | alter the result. | |
4301 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
4302 | ||
4303 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
4304 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
4305 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
4306 | { | |
4307 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4070745f | 4308 | type = c_common_signed_or_unsigned_type (unsignedp0 |
78a8ed03 | 4309 | || TYPE_UNSIGNED (*restype_ptr), |
4070745f | 4310 | type); |
b0fc3e72 | 4311 | /* Make sure shorter operand is extended the right way |
4312 | to match the longer operand. */ | |
4070745f | 4313 | primop0 |
4314 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
4315 | TREE_TYPE (primop0)), | |
4316 | primop0); | |
4317 | primop1 | |
4318 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
4319 | TREE_TYPE (primop1)), | |
4320 | primop1); | |
b0fc3e72 | 4321 | } |
4322 | else | |
4323 | { | |
4324 | /* Here we must do the comparison on the nominal type | |
4325 | using the args exactly as we received them. */ | |
4326 | type = *restype_ptr; | |
4327 | primop0 = op0; | |
4328 | primop1 = op1; | |
4329 | ||
4330 | if (!real1 && !real2 && integer_zerop (primop1) | |
78a8ed03 | 4331 | && TYPE_UNSIGNED (*restype_ptr)) |
b0fc3e72 | 4332 | { |
4333 | tree value = 0; | |
03fe1dc2 | 4334 | /* All unsigned values are >= 0, so we warn. However, |
4335 | if OP0 is a constant that is >= 0, the signedness of | |
4336 | the comparison isn't an issue, so suppress the | |
4337 | warning. */ | |
4338 | bool warn = | |
3df42822 | 4339 | warn_type_limits && !in_system_header_at (loc) |
03fe1dc2 | 4340 | && !(TREE_CODE (primop0) == INTEGER_CST |
4341 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
4342 | primop0))) | |
4343 | /* Do not warn for enumeration types. */ | |
4344 | && (TREE_CODE (expr_original_type (primop0)) != ENUMERAL_TYPE); | |
4345 | ||
b0fc3e72 | 4346 | switch (code) |
4347 | { | |
4348 | case GE_EXPR: | |
03fe1dc2 | 4349 | if (warn) |
4350 | warning_at (loc, OPT_Wtype_limits, | |
4351 | "comparison of unsigned expression >= 0 is always true"); | |
3c2239cf | 4352 | value = truthvalue_true_node; |
b0fc3e72 | 4353 | break; |
4354 | ||
4355 | case LT_EXPR: | |
03fe1dc2 | 4356 | if (warn) |
4357 | warning_at (loc, OPT_Wtype_limits, | |
4358 | "comparison of unsigned expression < 0 is always false"); | |
3c2239cf | 4359 | value = truthvalue_false_node; |
31f820d2 | 4360 | break; |
4361 | ||
4362 | default: | |
4363 | break; | |
b0fc3e72 | 4364 | } |
4365 | ||
4366 | if (value != 0) | |
4367 | { | |
4368 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
4369 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 4370 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
4371 | primop0, value); | |
b0fc3e72 | 4372 | return value; |
4373 | } | |
4374 | } | |
4375 | } | |
4376 | ||
4377 | *op0_ptr = convert (type, primop0); | |
4378 | *op1_ptr = convert (type, primop1); | |
4379 | ||
3c2239cf | 4380 | *restype_ptr = truthvalue_type_node; |
b0fc3e72 | 4381 | |
4382 | return 0; | |
4383 | } | |
4384 | \f | |
1c26100f | 4385 | /* Return a tree for the sum or difference (RESULTCODE says which) |
4386 | of pointer PTROP and integer INTOP. */ | |
4387 | ||
4388 | tree | |
389dd41b | 4389 | pointer_int_sum (location_t loc, enum tree_code resultcode, |
42f9a786 | 4390 | tree ptrop, tree intop, bool complain) |
1c26100f | 4391 | { |
add6ee5e | 4392 | tree size_exp, ret; |
1c26100f | 4393 | |
1c26100f | 4394 | /* The result is a pointer of the same type that is being added. */ |
1c26100f | 4395 | tree result_type = TREE_TYPE (ptrop); |
4396 | ||
4397 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
4398 | { | |
42f9a786 | 4399 | if (complain && warn_pointer_arith) |
4400 | pedwarn (loc, OPT_Wpointer_arith, | |
4401 | "pointer of type %<void *%> used in arithmetic"); | |
4402 | else if (!complain) | |
4403 | return error_mark_node; | |
1c26100f | 4404 | size_exp = integer_one_node; |
4405 | } | |
4406 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
4407 | { | |
42f9a786 | 4408 | if (complain && warn_pointer_arith) |
4409 | pedwarn (loc, OPT_Wpointer_arith, | |
4410 | "pointer to a function used in arithmetic"); | |
4411 | else if (!complain) | |
4412 | return error_mark_node; | |
1c26100f | 4413 | size_exp = integer_one_node; |
4414 | } | |
1c26100f | 4415 | else |
4416 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
4417 | ||
add6ee5e | 4418 | /* We are manipulating pointer values, so we don't need to warn |
4419 | about relying on undefined signed overflow. We disable the | |
4420 | warning here because we use integer types so fold won't know that | |
4421 | they are really pointers. */ | |
4422 | fold_defer_overflow_warnings (); | |
4423 | ||
1c26100f | 4424 | /* If what we are about to multiply by the size of the elements |
4425 | contains a constant term, apply distributive law | |
4426 | and multiply that constant term separately. | |
4427 | This helps produce common subexpressions. */ | |
1c26100f | 4428 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
84166705 | 4429 | && !TREE_CONSTANT (intop) |
1c26100f | 4430 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
4431 | && TREE_CONSTANT (size_exp) | |
4432 | /* If the constant comes from pointer subtraction, | |
4433 | skip this optimization--it would cause an error. */ | |
4434 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
4435 | /* If the constant is unsigned, and smaller than the pointer size, | |
4436 | then we must skip this optimization. This is because it could cause | |
4437 | an overflow error if the constant is negative but INTOP is not. */ | |
84166705 | 4438 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
1c26100f | 4439 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
4440 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
4441 | { | |
4442 | enum tree_code subcode = resultcode; | |
4443 | tree int_type = TREE_TYPE (intop); | |
4444 | if (TREE_CODE (intop) == MINUS_EXPR) | |
4445 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
4446 | /* Convert both subexpression types to the type of intop, | |
4447 | because weird cases involving pointer arithmetic | |
4448 | can result in a sum or difference with different type args. */ | |
8e70fb09 | 4449 | ptrop = build_binary_op (EXPR_LOCATION (TREE_OPERAND (intop, 1)), |
4450 | subcode, ptrop, | |
1c26100f | 4451 | convert (int_type, TREE_OPERAND (intop, 1)), 1); |
4452 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
4453 | } | |
4454 | ||
4455 | /* Convert the integer argument to a type the same size as sizetype | |
4456 | so the multiply won't overflow spuriously. */ | |
1c26100f | 4457 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
78a8ed03 | 4458 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
1cae46be | 4459 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
78a8ed03 | 4460 | TYPE_UNSIGNED (sizetype)), intop); |
1c26100f | 4461 | |
4462 | /* Replace the integer argument with a suitable product by the object size. | |
c6feb9f1 | 4463 | Do this multiplication as signed, then convert to the appropriate type |
8032877c | 4464 | for the pointer operation and disregard an overflow that occurred only |
c6feb9f1 | 4465 | because of the sign-extension change in the latter conversion. */ |
4466 | { | |
4467 | tree t = build_binary_op (loc, | |
4468 | MULT_EXPR, intop, | |
4469 | convert (TREE_TYPE (intop), size_exp), 1); | |
4470 | intop = convert (sizetype, t); | |
4471 | if (TREE_OVERFLOW_P (intop) && !TREE_OVERFLOW (t)) | |
e913b5cd | 4472 | intop = wide_int_to_tree (TREE_TYPE (intop), intop); |
c6feb9f1 | 4473 | } |
0de36bdb | 4474 | |
499e523f | 4475 | /* Create the sum or difference. */ |
0de36bdb | 4476 | if (resultcode == MINUS_EXPR) |
389dd41b | 4477 | intop = fold_build1_loc (loc, NEGATE_EXPR, sizetype, intop); |
1c26100f | 4478 | |
2cc66f2a | 4479 | ret = fold_build_pointer_plus_loc (loc, ptrop, intop); |
add6ee5e | 4480 | |
4481 | fold_undefer_and_ignore_overflow_warnings (); | |
4482 | ||
4483 | return ret; | |
1c26100f | 4484 | } |
4485 | \f | |
f59e3889 | 4486 | /* Wrap a C_MAYBE_CONST_EXPR around an expression that is fully folded |
4487 | and if NON_CONST is known not to be permitted in an evaluated part | |
4488 | of a constant expression. */ | |
4489 | ||
4490 | tree | |
4491 | c_wrap_maybe_const (tree expr, bool non_const) | |
4492 | { | |
4493 | bool nowarning = TREE_NO_WARNING (expr); | |
4494 | location_t loc = EXPR_LOCATION (expr); | |
4495 | ||
4496 | /* This should never be called for C++. */ | |
4497 | if (c_dialect_cxx ()) | |
4498 | gcc_unreachable (); | |
4499 | ||
4500 | /* The result of folding may have a NOP_EXPR to set TREE_NO_WARNING. */ | |
4501 | STRIP_TYPE_NOPS (expr); | |
4502 | expr = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL, expr); | |
4503 | C_MAYBE_CONST_EXPR_NON_CONST (expr) = non_const; | |
4504 | if (nowarning) | |
4505 | TREE_NO_WARNING (expr) = 1; | |
4506 | protected_set_expr_location (expr, loc); | |
4507 | ||
4508 | return expr; | |
4509 | } | |
4510 | ||
a75b1c71 | 4511 | /* Wrap a SAVE_EXPR around EXPR, if appropriate. Like save_expr, but |
4512 | for C folds the inside expression and wraps a C_MAYBE_CONST_EXPR | |
4513 | around the SAVE_EXPR if needed so that c_fully_fold does not need | |
4514 | to look inside SAVE_EXPRs. */ | |
4515 | ||
4516 | tree | |
4517 | c_save_expr (tree expr) | |
4518 | { | |
4519 | bool maybe_const = true; | |
4520 | if (c_dialect_cxx ()) | |
4521 | return save_expr (expr); | |
4522 | expr = c_fully_fold (expr, false, &maybe_const); | |
4523 | expr = save_expr (expr); | |
4524 | if (!maybe_const) | |
f59e3889 | 4525 | expr = c_wrap_maybe_const (expr, true); |
a75b1c71 | 4526 | return expr; |
4527 | } | |
4528 | ||
6b68e71a | 4529 | /* Return whether EXPR is a declaration whose address can never be |
4530 | NULL. */ | |
4531 | ||
4532 | bool | |
9f627b1a | 4533 | decl_with_nonnull_addr_p (const_tree expr) |
6b68e71a | 4534 | { |
4535 | return (DECL_P (expr) | |
4536 | && (TREE_CODE (expr) == PARM_DECL | |
4537 | || TREE_CODE (expr) == LABEL_DECL | |
4538 | || !DECL_WEAK (expr))); | |
4539 | } | |
4540 | ||
b0fc3e72 | 4541 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
45a78cc0 | 4542 | or for an `if' or `while' statement or ?..: exp. It should already |
4543 | have been validated to be of suitable type; otherwise, a bad | |
4544 | diagnostic may result. | |
b0fc3e72 | 4545 | |
8e70fb09 | 4546 | The EXPR is located at LOCATION. |
4547 | ||
b0fc3e72 | 4548 | This preparation consists of taking the ordinary |
4549 | representation of an expression expr and producing a valid tree | |
4550 | boolean expression describing whether expr is nonzero. We could | |
3c2239cf | 4551 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b0fc3e72 | 4552 | but we optimize comparisons, &&, ||, and !. |
4553 | ||
3c2239cf | 4554 | The resulting type should always be `truthvalue_type_node'. */ |
b0fc3e72 | 4555 | |
4556 | tree | |
8e70fb09 | 4557 | c_common_truthvalue_conversion (location_t location, tree expr) |
b0fc3e72 | 4558 | { |
b0fc3e72 | 4559 | switch (TREE_CODE (expr)) |
4560 | { | |
318a728f | 4561 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
e1232ce2 | 4562 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
4563 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
4564 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
ce04dcdc | 4565 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4566 | return expr; | |
e60a6f7b | 4567 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
ce04dcdc | 4568 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); |
e60a6f7b | 4569 | goto ret; |
ce04dcdc | 4570 | |
b0fc3e72 | 4571 | case TRUTH_ANDIF_EXPR: |
4572 | case TRUTH_ORIF_EXPR: | |
4573 | case TRUTH_AND_EXPR: | |
4574 | case TRUTH_OR_EXPR: | |
31f6e93c | 4575 | case TRUTH_XOR_EXPR: |
ce04dcdc | 4576 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4577 | return expr; | |
e60a6f7b | 4578 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
48e1416a | 4579 | c_common_truthvalue_conversion (location, |
e60a6f7b | 4580 | TREE_OPERAND (expr, 0)), |
4581 | c_common_truthvalue_conversion (location, | |
4582 | TREE_OPERAND (expr, 1))); | |
4583 | goto ret; | |
3e851b85 | 4584 | |
f6e28f72 | 4585 | case TRUTH_NOT_EXPR: |
ce04dcdc | 4586 | if (TREE_TYPE (expr) == truthvalue_type_node) |
4587 | return expr; | |
e60a6f7b | 4588 | expr = build1 (TREE_CODE (expr), truthvalue_type_node, |
4589 | c_common_truthvalue_conversion (location, | |
4590 | TREE_OPERAND (expr, 0))); | |
4591 | goto ret; | |
f6e28f72 | 4592 | |
b0fc3e72 | 4593 | case ERROR_MARK: |
4594 | return expr; | |
ab2c1de8 | 4595 | |
b0fc3e72 | 4596 | case INTEGER_CST: |
eddad94a | 4597 | return integer_zerop (expr) ? truthvalue_false_node |
4598 | : truthvalue_true_node; | |
b0fc3e72 | 4599 | |
4600 | case REAL_CST: | |
5000e21c | 4601 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
4602 | ? truthvalue_true_node | |
4603 | : truthvalue_false_node; | |
b0fc3e72 | 4604 | |
9421ebb9 | 4605 | case FIXED_CST: |
4606 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
4607 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
4608 | ? truthvalue_true_node | |
4609 | : truthvalue_false_node; | |
4610 | ||
ce04dcdc | 4611 | case FUNCTION_DECL: |
b6889cb0 | 4612 | expr = build_unary_op (location, ADDR_EXPR, expr, 0); |
ce04dcdc | 4613 | /* Fall through. */ |
4614 | ||
b0fc3e72 | 4615 | case ADDR_EXPR: |
ce871053 | 4616 | { |
ee7d4d6a | 4617 | tree inner = TREE_OPERAND (expr, 0); |
6b68e71a | 4618 | if (decl_with_nonnull_addr_p (inner)) |
ce871053 | 4619 | { |
6b68e71a | 4620 | /* Common Ada/Pascal programmer's mistake. */ |
8e70fb09 | 4621 | warning_at (location, |
4622 | OPT_Waddress, | |
4623 | "the address of %qD will always evaluate as %<true%>", | |
4624 | inner); | |
ce871053 | 4625 | return truthvalue_true_node; |
4626 | } | |
d473d901 | 4627 | break; |
ce871053 | 4628 | } |
b0fc3e72 | 4629 | |
2203bd5c | 4630 | case COMPLEX_EXPR: |
e60a6f7b | 4631 | expr = build_binary_op (EXPR_LOCATION (expr), |
8e70fb09 | 4632 | (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
95809de4 | 4633 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
8e70fb09 | 4634 | c_common_truthvalue_conversion (location, |
4635 | TREE_OPERAND (expr, 0)), | |
4636 | c_common_truthvalue_conversion (location, | |
4637 | TREE_OPERAND (expr, 1)), | |
2203bd5c | 4638 | 0); |
e60a6f7b | 4639 | goto ret; |
2203bd5c | 4640 | |
b0fc3e72 | 4641 | case NEGATE_EXPR: |
4642 | case ABS_EXPR: | |
4643 | case FLOAT_EXPR: | |
c6418a4e | 4644 | case EXCESS_PRECISION_EXPR: |
d10cfa8d | 4645 | /* These don't change whether an object is nonzero or zero. */ |
8e70fb09 | 4646 | return c_common_truthvalue_conversion (location, TREE_OPERAND (expr, 0)); |
b0fc3e72 | 4647 | |
4648 | case LROTATE_EXPR: | |
4649 | case RROTATE_EXPR: | |
d10cfa8d | 4650 | /* These don't change whether an object is zero or nonzero, but |
b0fc3e72 | 4651 | we can't ignore them if their second arg has side-effects. */ |
4652 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
e60a6f7b | 4653 | { |
4654 | expr = build2 (COMPOUND_EXPR, truthvalue_type_node, | |
4655 | TREE_OPERAND (expr, 1), | |
48e1416a | 4656 | c_common_truthvalue_conversion |
e60a6f7b | 4657 | (location, TREE_OPERAND (expr, 0))); |
4658 | goto ret; | |
4659 | } | |
b0fc3e72 | 4660 | else |
8e70fb09 | 4661 | return c_common_truthvalue_conversion (location, |
4662 | TREE_OPERAND (expr, 0)); | |
73be5127 | 4663 | |
b0fc3e72 | 4664 | case COND_EXPR: |
4665 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
a75b1c71 | 4666 | if (c_dialect_cxx ()) |
e60a6f7b | 4667 | { |
d0389adc | 4668 | tree op1 = TREE_OPERAND (expr, 1); |
4669 | tree op2 = TREE_OPERAND (expr, 2); | |
4670 | /* In C++ one of the arms might have void type if it is throw. */ | |
4671 | if (!VOID_TYPE_P (TREE_TYPE (op1))) | |
4672 | op1 = c_common_truthvalue_conversion (location, op1); | |
4673 | if (!VOID_TYPE_P (TREE_TYPE (op2))) | |
4674 | op2 = c_common_truthvalue_conversion (location, op2); | |
389dd41b | 4675 | expr = fold_build3_loc (location, COND_EXPR, truthvalue_type_node, |
d0389adc | 4676 | TREE_OPERAND (expr, 0), op1, op2); |
e60a6f7b | 4677 | goto ret; |
4678 | } | |
a75b1c71 | 4679 | else |
e60a6f7b | 4680 | { |
4681 | /* Folding will happen later for C. */ | |
4682 | expr = build3 (COND_EXPR, truthvalue_type_node, | |
4683 | TREE_OPERAND (expr, 0), | |
4684 | c_common_truthvalue_conversion (location, | |
4685 | TREE_OPERAND (expr, 1)), | |
4686 | c_common_truthvalue_conversion (location, | |
4687 | TREE_OPERAND (expr, 2))); | |
4688 | goto ret; | |
4689 | } | |
b0fc3e72 | 4690 | |
72dd6141 | 4691 | CASE_CONVERT: |
f8913d47 | 4692 | { |
4693 | tree totype = TREE_TYPE (expr); | |
4694 | tree fromtype = TREE_TYPE (TREE_OPERAND (expr, 0)); | |
4695 | ||
4696 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, | |
4697 | since that affects how `default_conversion' will behave. */ | |
4698 | if (TREE_CODE (totype) == REFERENCE_TYPE | |
4699 | || TREE_CODE (fromtype) == REFERENCE_TYPE) | |
4700 | break; | |
4701 | /* Don't strip a conversion from C++0x scoped enum, since they | |
4702 | don't implicitly convert to other types. */ | |
4703 | if (TREE_CODE (fromtype) == ENUMERAL_TYPE | |
4704 | && ENUM_IS_SCOPED (fromtype)) | |
4705 | break; | |
4706 | /* If this isn't narrowing the argument, we can ignore it. */ | |
4707 | if (TYPE_PRECISION (totype) >= TYPE_PRECISION (fromtype)) | |
4708 | return c_common_truthvalue_conversion (location, | |
4709 | TREE_OPERAND (expr, 0)); | |
4710 | } | |
b0fc3e72 | 4711 | break; |
4712 | ||
16837b18 | 4713 | case MODIFY_EXPR: |
60a0513e | 4714 | if (!TREE_NO_WARNING (expr) |
4715 | && warn_parentheses) | |
4716 | { | |
4717 | warning (OPT_Wparentheses, | |
4718 | "suggest parentheses around assignment used as truth value"); | |
4719 | TREE_NO_WARNING (expr) = 1; | |
4720 | } | |
16837b18 | 4721 | break; |
73be5127 | 4722 | |
31f820d2 | 4723 | default: |
4724 | break; | |
b0fc3e72 | 4725 | } |
4726 | ||
2ba726d2 | 4727 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
a0748b7d | 4728 | { |
93be21c0 | 4729 | tree t = (in_late_binary_op ? save_expr (expr) : c_save_expr (expr)); |
e60a6f7b | 4730 | expr = (build_binary_op |
8e70fb09 | 4731 | (EXPR_LOCATION (expr), |
4732 | (TREE_SIDE_EFFECTS (expr) | |
a0748b7d | 4733 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
b6889cb0 | 4734 | c_common_truthvalue_conversion |
4735 | (location, | |
4736 | build_unary_op (location, REALPART_EXPR, t, 0)), | |
4737 | c_common_truthvalue_conversion | |
4738 | (location, | |
4739 | build_unary_op (location, IMAGPART_EXPR, t, 0)), | |
a0748b7d | 4740 | 0)); |
e60a6f7b | 4741 | goto ret; |
a0748b7d | 4742 | } |
2ba726d2 | 4743 | |
9421ebb9 | 4744 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
4745 | { | |
4746 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
4747 | FCONST0 (TYPE_MODE | |
4748 | (TREE_TYPE (expr)))); | |
43158006 | 4749 | return build_binary_op (location, NE_EXPR, expr, fixed_zero_node, 1); |
9421ebb9 | 4750 | } |
e60a6f7b | 4751 | else |
4752 | return build_binary_op (location, NE_EXPR, expr, integer_zero_node, 1); | |
9421ebb9 | 4753 | |
e60a6f7b | 4754 | ret: |
4755 | protected_set_expr_location (expr, location); | |
4756 | return expr; | |
b0fc3e72 | 4757 | } |
4758 | \f | |
3237155d | 4759 | static void def_builtin_1 (enum built_in_function fncode, |
4760 | const char *name, | |
4761 | enum built_in_class fnclass, | |
4762 | tree fntype, tree libtype, | |
4763 | bool both_p, bool fallback_p, bool nonansi_p, | |
4764 | tree fnattrs, bool implicit_p); | |
0d4238dc | 4765 | |
a5b1863e | 4766 | |
4767 | /* Apply the TYPE_QUALS to the new DECL. */ | |
4768 | ||
4769 | void | |
1cae46be | 4770 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
a5b1863e | 4771 | { |
adfb367f | 4772 | tree type = TREE_TYPE (decl); |
b27ac6b5 | 4773 | |
e4eabbe4 | 4774 | if (type == error_mark_node) |
4775 | return; | |
adfb367f | 4776 | |
98a33d9f | 4777 | if ((type_quals & TYPE_QUAL_CONST) |
4778 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
4779 | /* We used to check TYPE_NEEDS_CONSTRUCTING here, but now a constexpr | |
4780 | constructor can produce constant init, so rely on cp_finish_decl to | |
4781 | clear TREE_READONLY if the variable has non-constant init. */ | |
a5b1863e | 4782 | TREE_READONLY (decl) = 1; |
4783 | if (type_quals & TYPE_QUAL_VOLATILE) | |
4784 | { | |
4785 | TREE_SIDE_EFFECTS (decl) = 1; | |
4786 | TREE_THIS_VOLATILE (decl) = 1; | |
4787 | } | |
d91a20bc | 4788 | if (type_quals & TYPE_QUAL_RESTRICT) |
a5b1863e | 4789 | { |
adfb367f | 4790 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
4791 | /* Allow 'restrict' on arrays of pointers. | |
4792 | FIXME currently we just ignore it. */ | |
4793 | type = TREE_TYPE (type); | |
4794 | if (!type | |
4795 | || !POINTER_TYPE_P (type) | |
4796 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
b0b1af64 | 4797 | error ("invalid use of %<restrict%>"); |
a5b1863e | 4798 | } |
4799 | } | |
4800 | ||
4ee9c684 | 4801 | /* Hash function for the problem of multiple type definitions in |
4802 | different files. This must hash all types that will compare | |
4803 | equal via comptypes to the same value. In practice it hashes | |
0bed3869 | 4804 | on some of the simple stuff and leaves the details to comptypes. */ |
4ee9c684 | 4805 | |
4806 | static hashval_t | |
4807 | c_type_hash (const void *p) | |
4808 | { | |
ecf2703d | 4809 | int n_elements; |
4ee9c684 | 4810 | int shift, size; |
aae87fc3 | 4811 | const_tree const t = (const_tree) p; |
4ee9c684 | 4812 | tree t2; |
4813 | switch (TREE_CODE (t)) | |
4814 | { | |
fbf0afd1 | 4815 | /* For pointers, hash on pointee type plus some swizzling. */ |
2363ef00 | 4816 | case POINTER_TYPE: |
4817 | return c_type_hash (TREE_TYPE (t)) ^ 0x3003003; | |
4818 | /* Hash on number of elements and total size. */ | |
4819 | case ENUMERAL_TYPE: | |
4820 | shift = 3; | |
4821 | t2 = TYPE_VALUES (t); | |
4822 | break; | |
4823 | case RECORD_TYPE: | |
4824 | shift = 0; | |
4825 | t2 = TYPE_FIELDS (t); | |
4826 | break; | |
4827 | case QUAL_UNION_TYPE: | |
4828 | shift = 1; | |
4829 | t2 = TYPE_FIELDS (t); | |
4830 | break; | |
4831 | case UNION_TYPE: | |
4832 | shift = 2; | |
4833 | t2 = TYPE_FIELDS (t); | |
4834 | break; | |
4835 | default: | |
231bd014 | 4836 | gcc_unreachable (); |
4ee9c684 | 4837 | } |
ecf2703d | 4838 | /* FIXME: We want to use a DECL_CHAIN iteration method here, but |
4839 | TYPE_VALUES of ENUMERAL_TYPEs is stored as a TREE_LIST. */ | |
4840 | n_elements = list_length (t2); | |
78c2e180 | 4841 | /* We might have a VLA here. */ |
4842 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
4843 | size = 0; | |
4844 | else | |
f9ae6f95 | 4845 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); |
ecf2703d | 4846 | return ((size << 24) | (n_elements << shift)); |
4ee9c684 | 4847 | } |
4848 | ||
1ecd4018 | 4849 | static GTY((param_is (union tree_node))) htab_t type_hash_table; |
4850 | ||
b5ba9f3a | 4851 | /* Return the typed-based alias set for T, which may be an expression |
f7c44134 | 4852 | or a type. Return -1 if we don't do anything special. */ |
ab2c1de8 | 4853 | |
32c2fdea | 4854 | alias_set_type |
1cae46be | 4855 | c_common_get_alias_set (tree t) |
b5ba9f3a | 4856 | { |
be4f2de7 | 4857 | tree u; |
4ee9c684 | 4858 | PTR *slot; |
1cae46be | 4859 | |
e58c17e7 | 4860 | /* For VLAs, use the alias set of the element type rather than the |
4861 | default of alias set 0 for types compared structurally. */ | |
4862 | if (TYPE_P (t) && TYPE_STRUCTURAL_EQUALITY_P (t)) | |
4863 | { | |
4864 | if (TREE_CODE (t) == ARRAY_TYPE) | |
4865 | return get_alias_set (TREE_TYPE (t)); | |
4866 | return -1; | |
4867 | } | |
4868 | ||
be4f2de7 | 4869 | /* Permit type-punning when accessing a union, provided the access |
4870 | is directly through the union. For example, this code does not | |
4871 | permit taking the address of a union member and then storing | |
4872 | through it. Even the type-punning allowed here is a GCC | |
4873 | extension, albeit a common and useful one; the C standard says | |
4874 | that such accesses have implementation-defined behavior. */ | |
4875 | for (u = t; | |
4876 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
4877 | u = TREE_OPERAND (u, 0)) | |
4878 | if (TREE_CODE (u) == COMPONENT_REF | |
4879 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
4880 | return 0; | |
1e2513d9 | 4881 | |
9fcc3e54 | 4882 | /* That's all the expressions we handle specially. */ |
84166705 | 4883 | if (!TYPE_P (t)) |
9fcc3e54 | 4884 | return -1; |
4885 | ||
d716ce75 | 4886 | /* The C standard guarantees that any object may be accessed via an |
9fcc3e54 | 4887 | lvalue that has character type. */ |
4888 | if (t == char_type_node | |
4889 | || t == signed_char_type_node | |
4890 | || t == unsigned_char_type_node) | |
f7c44134 | 4891 | return 0; |
a5b1863e | 4892 | |
1607663f | 4893 | /* The C standard specifically allows aliasing between signed and |
4894 | unsigned variants of the same type. We treat the signed | |
4895 | variant as canonical. */ | |
78a8ed03 | 4896 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
a8868e19 | 4897 | { |
4070745f | 4898 | tree t1 = c_common_signed_type (t); |
1607663f | 4899 | |
a8868e19 | 4900 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
4901 | if (t1 != t) | |
4902 | return get_alias_set (t1); | |
4903 | } | |
1e2513d9 | 4904 | |
4ee9c684 | 4905 | /* Handle the case of multiple type nodes referring to "the same" type, |
4906 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
4907 | C90 is handled. (In C99 type compatibility is not transitive, which | |
4908 | complicates things mightily. The alias set splay trees can theoretically | |
4909 | represent this, but insertion is tricky when you consider all the | |
4910 | different orders things might arrive in.) */ | |
4911 | ||
4912 | if (c_language != clk_c || flag_isoc99) | |
4913 | return -1; | |
4914 | ||
0bed3869 | 4915 | /* Save time if there's only one input file. */ |
e08bd2f4 | 4916 | if (num_in_fnames == 1) |
4ee9c684 | 4917 | return -1; |
4918 | ||
4919 | /* Pointers need special handling if they point to any type that | |
4920 | needs special handling (below). */ | |
4921 | if (TREE_CODE (t) == POINTER_TYPE) | |
4922 | { | |
4923 | tree t2; | |
4924 | /* Find bottom type under any nested POINTERs. */ | |
b27ac6b5 | 4925 | for (t2 = TREE_TYPE (t); |
af592f67 | 4926 | TREE_CODE (t2) == POINTER_TYPE; |
4927 | t2 = TREE_TYPE (t2)) | |
4928 | ; | |
b27ac6b5 | 4929 | if (TREE_CODE (t2) != RECORD_TYPE |
af592f67 | 4930 | && TREE_CODE (t2) != ENUMERAL_TYPE |
4931 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
4932 | && TREE_CODE (t2) != UNION_TYPE) | |
4933 | return -1; | |
4ee9c684 | 4934 | if (TYPE_SIZE (t2) == 0) |
af592f67 | 4935 | return -1; |
4ee9c684 | 4936 | } |
4937 | /* These are the only cases that need special handling. */ | |
b27ac6b5 | 4938 | if (TREE_CODE (t) != RECORD_TYPE |
4ee9c684 | 4939 | && TREE_CODE (t) != ENUMERAL_TYPE |
4940 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
4941 | && TREE_CODE (t) != UNION_TYPE | |
4942 | && TREE_CODE (t) != POINTER_TYPE) | |
4943 | return -1; | |
4944 | /* Undefined? */ | |
4945 | if (TYPE_SIZE (t) == 0) | |
4946 | return -1; | |
4947 | ||
b27ac6b5 | 4948 | /* Look up t in hash table. Only one of the compatible types within each |
4ee9c684 | 4949 | alias set is recorded in the table. */ |
4950 | if (!type_hash_table) | |
1ecd4018 | 4951 | type_hash_table = htab_create_ggc (1021, c_type_hash, |
4ee9c684 | 4952 | (htab_eq) lang_hooks.types_compatible_p, |
4953 | NULL); | |
4954 | slot = htab_find_slot (type_hash_table, t, INSERT); | |
4955 | if (*slot != NULL) | |
ad16cb2c | 4956 | { |
4957 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
4958 | return TYPE_ALIAS_SET ((tree)*slot); | |
4959 | } | |
4ee9c684 | 4960 | else |
4961 | /* Our caller will assign and record (in t) a new alias set; all we need | |
4962 | to do is remember t in the hash table. */ | |
4963 | *slot = t; | |
4964 | ||
f7c44134 | 4965 | return -1; |
b5ba9f3a | 4966 | } |
902b4e01 | 4967 | \f |
e60a6f7b | 4968 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where |
a179a7dc | 4969 | the IS_SIZEOF parameter indicates which operator is being applied. |
e60a6f7b | 4970 | The COMPLAIN flag controls whether we should diagnose possibly |
4971 | ill-formed constructs or not. LOC is the location of the SIZEOF or | |
a179a7dc | 4972 | TYPEOF operator. If MIN_ALIGNOF, the least alignment required for |
4973 | a type in any context should be returned, rather than the normal | |
4974 | alignment for that type. */ | |
908c697e | 4975 | |
902b4e01 | 4976 | tree |
e60a6f7b | 4977 | c_sizeof_or_alignof_type (location_t loc, |
a179a7dc | 4978 | tree type, bool is_sizeof, bool min_alignof, |
4979 | int complain) | |
902b4e01 | 4980 | { |
d4c4d95c | 4981 | const char *op_name; |
4982 | tree value = NULL; | |
4983 | enum tree_code type_code = TREE_CODE (type); | |
1cae46be | 4984 | |
908c697e | 4985 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
1cae46be | 4986 | |
d4c4d95c | 4987 | if (type_code == FUNCTION_TYPE) |
902b4e01 | 4988 | { |
908c697e | 4989 | if (is_sizeof) |
d4c4d95c | 4990 | { |
9205a6cc | 4991 | if (complain && warn_pointer_arith) |
4992 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 4993 | "invalid application of %<sizeof%> to a function type"); |
ebd21de4 | 4994 | else if (!complain) |
4995 | return error_mark_node; | |
d4c4d95c | 4996 | value = size_one_node; |
4997 | } | |
4998 | else | |
83e25171 | 4999 | { |
5000 | if (complain) | |
5001 | { | |
5002 | if (c_dialect_cxx ()) | |
29438999 | 5003 | pedwarn (loc, OPT_Wpedantic, "ISO C++ does not permit " |
83e25171 | 5004 | "%<alignof%> applied to a function type"); |
5005 | else | |
29438999 | 5006 | pedwarn (loc, OPT_Wpedantic, "ISO C does not permit " |
83e25171 | 5007 | "%<_Alignof%> applied to a function type"); |
5008 | } | |
5009 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
5010 | } | |
d4c4d95c | 5011 | } |
5012 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
5013 | { | |
1cae46be | 5014 | if (type_code == VOID_TYPE |
9205a6cc | 5015 | && complain && warn_pointer_arith) |
5016 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 5017 | "invalid application of %qs to a void type", op_name); |
ebd21de4 | 5018 | else if (!complain) |
5019 | return error_mark_node; | |
d4c4d95c | 5020 | value = size_one_node; |
902b4e01 | 5021 | } |
3df19e1b | 5022 | else if (!COMPLETE_TYPE_P (type) |
5023 | && (!c_dialect_cxx () || is_sizeof || type_code != ARRAY_TYPE)) | |
902b4e01 | 5024 | { |
d3a4d008 | 5025 | if (complain) |
3df19e1b | 5026 | error_at (loc, "invalid application of %qs to incomplete type %qT", |
e60a6f7b | 5027 | op_name, type); |
9c719c74 | 5028 | return error_mark_node; |
902b4e01 | 5029 | } |
3df19e1b | 5030 | else if (c_dialect_cxx () && type_code == ARRAY_TYPE |
5031 | && !COMPLETE_TYPE_P (TREE_TYPE (type))) | |
5032 | { | |
5033 | if (complain) | |
5034 | error_at (loc, "invalid application of %qs to array type %qT of " | |
5035 | "incomplete element type", op_name, type); | |
5036 | return error_mark_node; | |
5037 | } | |
902b4e01 | 5038 | else |
d4c4d95c | 5039 | { |
908c697e | 5040 | if (is_sizeof) |
d4c4d95c | 5041 | /* Convert in case a char is more than one unit. */ |
389dd41b | 5042 | value = size_binop_loc (loc, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
5043 | size_int (TYPE_PRECISION (char_type_node) | |
5044 | / BITS_PER_UNIT)); | |
a179a7dc | 5045 | else if (min_alignof) |
c2c4ae8d | 5046 | value = size_int (min_align_of_type (type)); |
d4c4d95c | 5047 | else |
d37625c0 | 5048 | value = size_int (TYPE_ALIGN_UNIT (type)); |
d4c4d95c | 5049 | } |
902b4e01 | 5050 | |
5a1fe2db | 5051 | /* VALUE will have the middle-end integer type sizetype. |
5052 | However, we should really return a value of type `size_t', | |
5053 | which is just a typedef for an ordinary integer type. */ | |
389dd41b | 5054 | value = fold_convert_loc (loc, size_type_node, value); |
1cae46be | 5055 | |
d4c4d95c | 5056 | return value; |
902b4e01 | 5057 | } |
5058 | ||
5059 | /* Implement the __alignof keyword: Return the minimum required | |
097b5c8b | 5060 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
5061 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
e60a6f7b | 5062 | from an "aligned" __attribute__ specification). LOC is the |
5063 | location of the ALIGNOF operator. */ | |
72040e7e | 5064 | |
902b4e01 | 5065 | tree |
e60a6f7b | 5066 | c_alignof_expr (location_t loc, tree expr) |
902b4e01 | 5067 | { |
5068 | tree t; | |
5069 | ||
097b5c8b | 5070 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
d37625c0 | 5071 | t = size_int (DECL_ALIGN_UNIT (expr)); |
1cae46be | 5072 | |
902b4e01 | 5073 | else if (TREE_CODE (expr) == COMPONENT_REF |
5074 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
5075 | { | |
e60a6f7b | 5076 | error_at (loc, "%<__alignof%> applied to a bit-field"); |
902b4e01 | 5077 | t = size_one_node; |
5078 | } | |
5079 | else if (TREE_CODE (expr) == COMPONENT_REF | |
7cc7e163 | 5080 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
d37625c0 | 5081 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
1cae46be | 5082 | |
902b4e01 | 5083 | else if (TREE_CODE (expr) == INDIRECT_REF) |
5084 | { | |
5085 | tree t = TREE_OPERAND (expr, 0); | |
5086 | tree best = t; | |
5087 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
1cae46be | 5088 | |
72dd6141 | 5089 | while (CONVERT_EXPR_P (t) |
7cc7e163 | 5090 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
902b4e01 | 5091 | { |
5092 | int thisalign; | |
5093 | ||
5094 | t = TREE_OPERAND (t, 0); | |
5095 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
5096 | if (thisalign > bestalign) | |
5097 | best = t, bestalign = thisalign; | |
5098 | } | |
e60a6f7b | 5099 | return c_alignof (loc, TREE_TYPE (TREE_TYPE (best))); |
902b4e01 | 5100 | } |
5101 | else | |
e60a6f7b | 5102 | return c_alignof (loc, TREE_TYPE (expr)); |
902b4e01 | 5103 | |
389dd41b | 5104 | return fold_convert_loc (loc, size_type_node, t); |
902b4e01 | 5105 | } |
5106 | \f | |
8fe4a266 | 5107 | /* Handle C and C++ default attributes. */ |
5108 | ||
5109 | enum built_in_attribute | |
5110 | { | |
5111 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
5112 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
c8010b80 | 5113 | #define DEF_ATTR_STRING(ENUM, VALUE) ENUM, |
8fe4a266 | 5114 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, |
5115 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
8fe4a266 | 5116 | #include "builtin-attrs.def" |
5117 | #undef DEF_ATTR_NULL_TREE | |
5118 | #undef DEF_ATTR_INT | |
c8010b80 | 5119 | #undef DEF_ATTR_STRING |
8fe4a266 | 5120 | #undef DEF_ATTR_IDENT |
5121 | #undef DEF_ATTR_TREE_LIST | |
8fe4a266 | 5122 | ATTR_LAST |
5123 | }; | |
5124 | ||
5125 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
5126 | ||
1cae46be | 5127 | static void c_init_attributes (void); |
8fe4a266 | 5128 | |
27213ba3 | 5129 | enum c_builtin_type |
72040e7e | 5130 | { |
d2d4bdde | 5131 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
5132 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
5133 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
5134 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
5135 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
5136 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
0a39fd54 | 5137 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
3c77ca67 | 5138 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5139 | ARG6) NAME, | |
5140 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5141 | ARG6, ARG7) NAME, | |
5142 | #define DEF_FUNCTION_TYPE_8(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5143 | ARG6, ARG7, ARG8) NAME, | |
d2d4bdde | 5144 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
5145 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
5146 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
03901330 | 5147 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
0a39fd54 | 5148 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
3c77ca67 | 5149 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ |
0a39fd54 | 5150 | NAME, |
d2d4bdde | 5151 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
5152 | #include "builtin-types.def" | |
5153 | #undef DEF_PRIMITIVE_TYPE | |
5154 | #undef DEF_FUNCTION_TYPE_0 | |
5155 | #undef DEF_FUNCTION_TYPE_1 | |
5156 | #undef DEF_FUNCTION_TYPE_2 | |
5157 | #undef DEF_FUNCTION_TYPE_3 | |
5158 | #undef DEF_FUNCTION_TYPE_4 | |
0a39fd54 | 5159 | #undef DEF_FUNCTION_TYPE_5 |
5160 | #undef DEF_FUNCTION_TYPE_6 | |
27213ba3 | 5161 | #undef DEF_FUNCTION_TYPE_7 |
bc7bff74 | 5162 | #undef DEF_FUNCTION_TYPE_8 |
d2d4bdde | 5163 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5164 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5165 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
03901330 | 5166 | #undef DEF_FUNCTION_TYPE_VAR_3 |
0a39fd54 | 5167 | #undef DEF_FUNCTION_TYPE_VAR_4 |
5168 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
d2d4bdde | 5169 | #undef DEF_POINTER_TYPE |
27213ba3 | 5170 | BT_LAST |
5171 | }; | |
5172 | ||
5173 | typedef enum c_builtin_type builtin_type; | |
d2d4bdde | 5174 | |
27213ba3 | 5175 | /* A temporary array for c_common_nodes_and_builtins. Used in |
5176 | communication with def_fn_type. */ | |
5177 | static tree builtin_types[(int) BT_LAST + 1]; | |
d2d4bdde | 5178 | |
27213ba3 | 5179 | /* A helper function for c_common_nodes_and_builtins. Build function type |
5180 | for DEF with return type RET and N arguments. If VAR is true, then the | |
5181 | function should be variadic after those N arguments. | |
5182 | ||
5183 | Takes special care not to ICE if any of the types involved are | |
5184 | error_mark_node, which indicates that said type is not in fact available | |
5185 | (see builtin_type_for_size). In which case the function type as a whole | |
5186 | should be error_mark_node. */ | |
5187 | ||
5188 | static void | |
5189 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
5190 | { | |
3a939d12 | 5191 | tree t; |
5192 | tree *args = XALLOCAVEC (tree, n); | |
27213ba3 | 5193 | va_list list; |
5194 | int i; | |
5195 | ||
5196 | va_start (list, n); | |
5197 | for (i = 0; i < n; ++i) | |
5198 | { | |
7d339f93 | 5199 | builtin_type a = (builtin_type) va_arg (list, int); |
27213ba3 | 5200 | t = builtin_types[a]; |
5201 | if (t == error_mark_node) | |
5202 | goto egress; | |
3a939d12 | 5203 | args[i] = t; |
27213ba3 | 5204 | } |
27213ba3 | 5205 | |
27213ba3 | 5206 | t = builtin_types[ret]; |
5207 | if (t == error_mark_node) | |
5208 | goto egress; | |
3a939d12 | 5209 | if (var) |
5210 | t = build_varargs_function_type_array (t, n, args); | |
5211 | else | |
5212 | t = build_function_type_array (t, n, args); | |
27213ba3 | 5213 | |
5214 | egress: | |
5215 | builtin_types[def] = t; | |
451c8e2f | 5216 | va_end (list); |
27213ba3 | 5217 | } |
5218 | ||
dce22712 | 5219 | /* Build builtin functions common to both C and C++ language |
5220 | frontends. */ | |
5221 | ||
5222 | static void | |
5223 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
5224 | { | |
5225 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
5226 | builtin_types[ENUM] = VALUE; | |
5227 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
5228 | def_fn_type (ENUM, RETURN, 0, 0); | |
5229 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
5230 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
5231 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
5232 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
5233 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5234 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
5235 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5236 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
5237 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5238 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
5239 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5240 | ARG6) \ | |
5241 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
5242 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
5243 | ARG6, ARG7) \ | |
5244 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
bc7bff74 | 5245 | #define DEF_FUNCTION_TYPE_8(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
5246 | ARG6, ARG7, ARG8) \ | |
5247 | def_fn_type (ENUM, RETURN, 0, 8, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
5248 | ARG7, ARG8); | |
dce22712 | 5249 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ |
5250 | def_fn_type (ENUM, RETURN, 1, 0); | |
5251 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
5252 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
5253 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
5254 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
5255 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
5256 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
5257 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
5258 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
5259 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
5260 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
5261 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ | |
5262 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
5263 | ||
5264 | #include "builtin-types.def" | |
5265 | ||
5266 | #undef DEF_PRIMITIVE_TYPE | |
3c77ca67 | 5267 | #undef DEF_FUNCTION_TYPE_0 |
dce22712 | 5268 | #undef DEF_FUNCTION_TYPE_1 |
5269 | #undef DEF_FUNCTION_TYPE_2 | |
5270 | #undef DEF_FUNCTION_TYPE_3 | |
5271 | #undef DEF_FUNCTION_TYPE_4 | |
5272 | #undef DEF_FUNCTION_TYPE_5 | |
5273 | #undef DEF_FUNCTION_TYPE_6 | |
3c77ca67 | 5274 | #undef DEF_FUNCTION_TYPE_7 |
5275 | #undef DEF_FUNCTION_TYPE_8 | |
dce22712 | 5276 | #undef DEF_FUNCTION_TYPE_VAR_0 |
5277 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
5278 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
5279 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
5280 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
5281 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
5282 | #undef DEF_POINTER_TYPE | |
5283 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
5284 | ||
5285 | c_init_attributes (); | |
5286 | ||
5287 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
5288 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
5289 | if (NAME && COND) \ | |
5290 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
5291 | builtin_types[(int) TYPE], \ | |
5292 | builtin_types[(int) LIBTYPE], \ | |
5293 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
5294 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
5295 | #include "builtins.def" | |
5296 | #undef DEF_BUILTIN | |
5297 | ||
87eb1c28 | 5298 | targetm.init_builtins (); |
5299 | ||
471eff36 | 5300 | build_common_builtin_nodes (); |
dce22712 | 5301 | |
a89e6c15 | 5302 | if (flag_cilkplus) |
d037099f | 5303 | cilk_init_builtins (); |
dce22712 | 5304 | } |
5305 | ||
9e6687c8 | 5306 | /* Like get_identifier, but avoid warnings about null arguments when |
5307 | the argument may be NULL for targets where GCC lacks stdint.h type | |
5308 | information. */ | |
5309 | ||
5310 | static inline tree | |
5311 | c_get_ident (const char *id) | |
5312 | { | |
5313 | return get_identifier (id); | |
5314 | } | |
5315 | ||
27213ba3 | 5316 | /* Build tree nodes and builtin functions common to both C and C++ language |
5317 | frontends. */ | |
5318 | ||
5319 | void | |
5320 | c_common_nodes_and_builtins (void) | |
5321 | { | |
924bbf02 | 5322 | int char16_type_size; |
5323 | int char32_type_size; | |
174fcc61 | 5324 | int wchar_type_size; |
5325 | tree array_domain_type; | |
2d47cc32 | 5326 | tree va_list_ref_type_node; |
8a15c04a | 5327 | tree va_list_arg_type_node; |
a66c9326 | 5328 | |
c38a75b7 | 5329 | build_common_tree_nodes (flag_signed_char, flag_short_double); |
e593356b | 5330 | |
174fcc61 | 5331 | /* Define `int' and `char' first so that dbx will output them first. */ |
d946ea19 | 5332 | record_builtin_type (RID_INT, NULL, integer_type_node); |
174fcc61 | 5333 | record_builtin_type (RID_CHAR, "char", char_type_node); |
5334 | ||
5335 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
5336 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
5337 | but not C. Are the conditionals here needed? */ | |
c0f19401 | 5338 | if (c_dialect_cxx ()) |
d946ea19 | 5339 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
174fcc61 | 5340 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
5341 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
5342 | record_builtin_type (RID_MAX, "long unsigned int", | |
5343 | long_unsigned_type_node); | |
6388cfe2 | 5344 | if (int128_integer_type_node != NULL_TREE) |
5345 | { | |
5346 | record_builtin_type (RID_INT128, "__int128", | |
5347 | int128_integer_type_node); | |
5348 | record_builtin_type (RID_MAX, "__int128 unsigned", | |
5349 | int128_unsigned_type_node); | |
5350 | } | |
c0f19401 | 5351 | if (c_dialect_cxx ()) |
174fcc61 | 5352 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
5353 | record_builtin_type (RID_MAX, "long long int", | |
5354 | long_long_integer_type_node); | |
5355 | record_builtin_type (RID_MAX, "long long unsigned int", | |
5356 | long_long_unsigned_type_node); | |
c0f19401 | 5357 | if (c_dialect_cxx ()) |
174fcc61 | 5358 | record_builtin_type (RID_MAX, "long long unsigned", |
5359 | long_long_unsigned_type_node); | |
5360 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
5361 | record_builtin_type (RID_MAX, "short unsigned int", | |
5362 | short_unsigned_type_node); | |
c0f19401 | 5363 | if (c_dialect_cxx ()) |
174fcc61 | 5364 | record_builtin_type (RID_MAX, "unsigned short", |
5365 | short_unsigned_type_node); | |
5366 | ||
5367 | /* Define both `signed char' and `unsigned char'. */ | |
5368 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
5369 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
5370 | ||
771d21fa | 5371 | /* These are types that c_common_type_for_size and |
5372 | c_common_type_for_mode use. */ | |
e60a6f7b | 5373 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5374 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5375 | intQI_type_node)); |
e60a6f7b | 5376 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5377 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5378 | intHI_type_node)); |
e60a6f7b | 5379 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5380 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5381 | intSI_type_node)); |
e60a6f7b | 5382 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5383 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5384 | intDI_type_node)); |
174fcc61 | 5385 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 5386 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 5387 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5388 | TYPE_DECL, | |
f1515a39 | 5389 | get_identifier ("__int128_t"), |
5390 | intTI_type_node)); | |
174fcc61 | 5391 | #endif |
e60a6f7b | 5392 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5393 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5394 | unsigned_intQI_type_node)); |
e60a6f7b | 5395 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5396 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5397 | unsigned_intHI_type_node)); |
e60a6f7b | 5398 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5399 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5400 | unsigned_intSI_type_node)); |
e60a6f7b | 5401 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5402 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5403 | unsigned_intDI_type_node)); |
174fcc61 | 5404 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 5405 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 5406 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5407 | TYPE_DECL, | |
f1515a39 | 5408 | get_identifier ("__uint128_t"), |
5409 | unsigned_intTI_type_node)); | |
174fcc61 | 5410 | #endif |
5411 | ||
5412 | /* Create the widest literal types. */ | |
5413 | widest_integer_literal_type_node | |
5414 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 5415 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5416 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5417 | widest_integer_literal_type_node)); |
174fcc61 | 5418 | |
5419 | widest_unsigned_literal_type_node | |
5420 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 5421 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5422 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 5423 | widest_unsigned_literal_type_node)); |
174fcc61 | 5424 | |
654ef926 | 5425 | signed_size_type_node = c_common_signed_type (size_type_node); |
174fcc61 | 5426 | |
73673831 | 5427 | pid_type_node = |
5428 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
5429 | ||
d946ea19 | 5430 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
5431 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
174fcc61 | 5432 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
5433 | ||
c4503c0a | 5434 | /* Only supported decimal floating point extension if the target |
5435 | actually supports underlying modes. */ | |
48e1416a | 5436 | if (targetm.scalar_mode_supported_p (SDmode) |
c4503c0a | 5437 | && targetm.scalar_mode_supported_p (DDmode) |
5438 | && targetm.scalar_mode_supported_p (TDmode)) | |
5439 | { | |
5440 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
5441 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
5442 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
5443 | } | |
5444 | ||
9421ebb9 | 5445 | if (targetm.fixed_point_supported_p ()) |
5446 | { | |
5447 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
5448 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
5449 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
5450 | record_builtin_type (RID_MAX, "long long _Fract", | |
5451 | long_long_fract_type_node); | |
5452 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
5453 | unsigned_short_fract_type_node); | |
5454 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
5455 | unsigned_fract_type_node); | |
5456 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
5457 | unsigned_long_fract_type_node); | |
5458 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
5459 | unsigned_long_long_fract_type_node); | |
5460 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
5461 | sat_short_fract_type_node); | |
5462 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
5463 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
5464 | sat_long_fract_type_node); | |
5465 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
5466 | sat_long_long_fract_type_node); | |
5467 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
5468 | sat_unsigned_short_fract_type_node); | |
5469 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
5470 | sat_unsigned_fract_type_node); | |
5471 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
5472 | sat_unsigned_long_fract_type_node); | |
5473 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
5474 | sat_unsigned_long_long_fract_type_node); | |
5475 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
5476 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
5477 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
5478 | record_builtin_type (RID_MAX, "long long _Accum", | |
5479 | long_long_accum_type_node); | |
5480 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
5481 | unsigned_short_accum_type_node); | |
5482 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
5483 | unsigned_accum_type_node); | |
5484 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
5485 | unsigned_long_accum_type_node); | |
5486 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
5487 | unsigned_long_long_accum_type_node); | |
5488 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
5489 | sat_short_accum_type_node); | |
5490 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
5491 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
5492 | sat_long_accum_type_node); | |
5493 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
5494 | sat_long_long_accum_type_node); | |
5495 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
5496 | sat_unsigned_short_accum_type_node); | |
5497 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
5498 | sat_unsigned_accum_type_node); | |
5499 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
5500 | sat_unsigned_long_accum_type_node); | |
5501 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
5502 | sat_unsigned_long_long_accum_type_node); | |
5503 | ||
5504 | } | |
5505 | ||
e60a6f7b | 5506 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5507 | TYPE_DECL, | |
dc24ddbd | 5508 | get_identifier ("complex int"), |
5509 | complex_integer_type_node)); | |
e60a6f7b | 5510 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5511 | TYPE_DECL, | |
dc24ddbd | 5512 | get_identifier ("complex float"), |
5513 | complex_float_type_node)); | |
e60a6f7b | 5514 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
5515 | TYPE_DECL, | |
dc24ddbd | 5516 | get_identifier ("complex double"), |
5517 | complex_double_type_node)); | |
5518 | lang_hooks.decls.pushdecl | |
e60a6f7b | 5519 | (build_decl (UNKNOWN_LOCATION, |
5520 | TYPE_DECL, get_identifier ("complex long double"), | |
20325f61 | 5521 | complex_long_double_type_node)); |
174fcc61 | 5522 | |
e256d445 | 5523 | if (c_dialect_cxx ()) |
5524 | /* For C++, make fileptr_type_node a distinct void * type until | |
5525 | FILE type is defined. */ | |
e086912e | 5526 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
e256d445 | 5527 | |
d946ea19 | 5528 | record_builtin_type (RID_VOID, NULL, void_type_node); |
174fcc61 | 5529 | |
6753bca0 | 5530 | /* Set the TYPE_NAME for any variants that were built before |
5531 | record_builtin_type gave names to the built-in types. */ | |
5532 | { | |
5533 | tree void_name = TYPE_NAME (void_type_node); | |
5534 | TYPE_NAME (void_type_node) = NULL_TREE; | |
5535 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
5536 | = void_name; | |
5537 | TYPE_NAME (void_type_node) = void_name; | |
5538 | } | |
5539 | ||
174fcc61 | 5540 | void_list_node = build_void_list_node (); |
5541 | ||
5542 | /* Make a type to be the domain of a few array types | |
5543 | whose domains don't really matter. | |
5544 | 200 is small enough that it always fits in size_t | |
5545 | and large enough that it can hold most function names for the | |
5546 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
5547 | array_domain_type = build_index_type (size_int (200)); | |
5548 | ||
5549 | /* Make a type for arrays of characters. | |
5550 | With luck nothing will ever really depend on the length of this | |
5551 | array type. */ | |
5552 | char_array_type_node | |
5553 | = build_array_type (char_type_node, array_domain_type); | |
5554 | ||
d2d4bdde | 5555 | string_type_node = build_pointer_type (char_type_node); |
5556 | const_string_type_node | |
5557 | = build_pointer_type (build_qualified_type | |
5558 | (char_type_node, TYPE_QUAL_CONST)); | |
5559 | ||
174fcc61 | 5560 | /* This is special for C++ so functions can be overloaded. */ |
18ef7ac2 | 5561 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
174fcc61 | 5562 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
5563 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
f3449a3c | 5564 | underlying_wchar_type_node = wchar_type_node; |
c0f19401 | 5565 | if (c_dialect_cxx ()) |
174fcc61 | 5566 | { |
78a8ed03 | 5567 | if (TYPE_UNSIGNED (wchar_type_node)) |
174fcc61 | 5568 | wchar_type_node = make_unsigned_type (wchar_type_size); |
5569 | else | |
5570 | wchar_type_node = make_signed_type (wchar_type_size); | |
5571 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
5572 | } | |
174fcc61 | 5573 | |
5574 | /* This is for wide string constants. */ | |
5575 | wchar_array_type_node | |
5576 | = build_array_type (wchar_type_node, array_domain_type); | |
5577 | ||
924bbf02 | 5578 | /* Define 'char16_t'. */ |
5579 | char16_type_node = get_identifier (CHAR16_TYPE); | |
5580 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
5581 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
5582 | if (c_dialect_cxx ()) | |
5583 | { | |
5584 | char16_type_node = make_unsigned_type (char16_type_size); | |
5585 | ||
60777f69 | 5586 | if (cxx_dialect >= cxx11) |
924bbf02 | 5587 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); |
5588 | } | |
5589 | ||
5590 | /* This is for UTF-16 string constants. */ | |
5591 | char16_array_type_node | |
5592 | = build_array_type (char16_type_node, array_domain_type); | |
5593 | ||
5594 | /* Define 'char32_t'. */ | |
5595 | char32_type_node = get_identifier (CHAR32_TYPE); | |
5596 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
5597 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
5598 | if (c_dialect_cxx ()) | |
5599 | { | |
5600 | char32_type_node = make_unsigned_type (char32_type_size); | |
5601 | ||
60777f69 | 5602 | if (cxx_dialect >= cxx11) |
924bbf02 | 5603 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); |
5604 | } | |
5605 | ||
5606 | /* This is for UTF-32 string constants. */ | |
5607 | char32_array_type_node | |
5608 | = build_array_type (char32_type_node, array_domain_type); | |
5609 | ||
6bf5ed8d | 5610 | wint_type_node = |
5611 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
5612 | ||
5613 | intmax_type_node = | |
5614 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
5615 | uintmax_type_node = | |
5616 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
5617 | ||
f3449a3c | 5618 | if (SIG_ATOMIC_TYPE) |
5619 | sig_atomic_type_node = | |
9e6687c8 | 5620 | TREE_TYPE (identifier_global_value (c_get_ident (SIG_ATOMIC_TYPE))); |
f3449a3c | 5621 | if (INT8_TYPE) |
5622 | int8_type_node = | |
9e6687c8 | 5623 | TREE_TYPE (identifier_global_value (c_get_ident (INT8_TYPE))); |
f3449a3c | 5624 | if (INT16_TYPE) |
5625 | int16_type_node = | |
9e6687c8 | 5626 | TREE_TYPE (identifier_global_value (c_get_ident (INT16_TYPE))); |
f3449a3c | 5627 | if (INT32_TYPE) |
5628 | int32_type_node = | |
9e6687c8 | 5629 | TREE_TYPE (identifier_global_value (c_get_ident (INT32_TYPE))); |
f3449a3c | 5630 | if (INT64_TYPE) |
5631 | int64_type_node = | |
9e6687c8 | 5632 | TREE_TYPE (identifier_global_value (c_get_ident (INT64_TYPE))); |
f3449a3c | 5633 | if (UINT8_TYPE) |
5634 | uint8_type_node = | |
9e6687c8 | 5635 | TREE_TYPE (identifier_global_value (c_get_ident (UINT8_TYPE))); |
f3449a3c | 5636 | if (UINT16_TYPE) |
d1081017 | 5637 | c_uint16_type_node = uint16_type_node = |
9e6687c8 | 5638 | TREE_TYPE (identifier_global_value (c_get_ident (UINT16_TYPE))); |
f3449a3c | 5639 | if (UINT32_TYPE) |
d1081017 | 5640 | c_uint32_type_node = uint32_type_node = |
9e6687c8 | 5641 | TREE_TYPE (identifier_global_value (c_get_ident (UINT32_TYPE))); |
f3449a3c | 5642 | if (UINT64_TYPE) |
d1081017 | 5643 | c_uint64_type_node = uint64_type_node = |
9e6687c8 | 5644 | TREE_TYPE (identifier_global_value (c_get_ident (UINT64_TYPE))); |
f3449a3c | 5645 | if (INT_LEAST8_TYPE) |
5646 | int_least8_type_node = | |
9e6687c8 | 5647 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST8_TYPE))); |
f3449a3c | 5648 | if (INT_LEAST16_TYPE) |
5649 | int_least16_type_node = | |
9e6687c8 | 5650 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST16_TYPE))); |
f3449a3c | 5651 | if (INT_LEAST32_TYPE) |
5652 | int_least32_type_node = | |
9e6687c8 | 5653 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST32_TYPE))); |
f3449a3c | 5654 | if (INT_LEAST64_TYPE) |
5655 | int_least64_type_node = | |
9e6687c8 | 5656 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST64_TYPE))); |
f3449a3c | 5657 | if (UINT_LEAST8_TYPE) |
5658 | uint_least8_type_node = | |
9e6687c8 | 5659 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST8_TYPE))); |
f3449a3c | 5660 | if (UINT_LEAST16_TYPE) |
5661 | uint_least16_type_node = | |
9e6687c8 | 5662 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST16_TYPE))); |
f3449a3c | 5663 | if (UINT_LEAST32_TYPE) |
5664 | uint_least32_type_node = | |
9e6687c8 | 5665 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST32_TYPE))); |
f3449a3c | 5666 | if (UINT_LEAST64_TYPE) |
5667 | uint_least64_type_node = | |
9e6687c8 | 5668 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST64_TYPE))); |
f3449a3c | 5669 | if (INT_FAST8_TYPE) |
5670 | int_fast8_type_node = | |
9e6687c8 | 5671 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST8_TYPE))); |
f3449a3c | 5672 | if (INT_FAST16_TYPE) |
5673 | int_fast16_type_node = | |
9e6687c8 | 5674 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST16_TYPE))); |
f3449a3c | 5675 | if (INT_FAST32_TYPE) |
5676 | int_fast32_type_node = | |
9e6687c8 | 5677 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST32_TYPE))); |
f3449a3c | 5678 | if (INT_FAST64_TYPE) |
5679 | int_fast64_type_node = | |
9e6687c8 | 5680 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST64_TYPE))); |
f3449a3c | 5681 | if (UINT_FAST8_TYPE) |
5682 | uint_fast8_type_node = | |
9e6687c8 | 5683 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST8_TYPE))); |
f3449a3c | 5684 | if (UINT_FAST16_TYPE) |
5685 | uint_fast16_type_node = | |
9e6687c8 | 5686 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST16_TYPE))); |
f3449a3c | 5687 | if (UINT_FAST32_TYPE) |
5688 | uint_fast32_type_node = | |
9e6687c8 | 5689 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST32_TYPE))); |
f3449a3c | 5690 | if (UINT_FAST64_TYPE) |
5691 | uint_fast64_type_node = | |
9e6687c8 | 5692 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST64_TYPE))); |
f3449a3c | 5693 | if (INTPTR_TYPE) |
5694 | intptr_type_node = | |
9e6687c8 | 5695 | TREE_TYPE (identifier_global_value (c_get_ident (INTPTR_TYPE))); |
f3449a3c | 5696 | if (UINTPTR_TYPE) |
5697 | uintptr_type_node = | |
9e6687c8 | 5698 | TREE_TYPE (identifier_global_value (c_get_ident (UINTPTR_TYPE))); |
f3449a3c | 5699 | |
3a939d12 | 5700 | default_function_type |
5701 | = build_varargs_function_type_list (integer_type_node, NULL_TREE); | |
6bf5ed8d | 5702 | ptrdiff_type_node |
5703 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
11773141 | 5704 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
6bf5ed8d | 5705 | |
dc24ddbd | 5706 | lang_hooks.decls.pushdecl |
e60a6f7b | 5707 | (build_decl (UNKNOWN_LOCATION, |
5708 | TYPE_DECL, get_identifier ("__builtin_va_list"), | |
20325f61 | 5709 | va_list_type_node)); |
202d6e5f | 5710 | if (targetm.enum_va_list_p) |
acd6f472 | 5711 | { |
5712 | int l; | |
5713 | const char *pname; | |
5714 | tree ptype; | |
5f57a8b1 | 5715 | |
202d6e5f | 5716 | for (l = 0; targetm.enum_va_list_p (l, &pname, &ptype); ++l) |
acd6f472 | 5717 | { |
5718 | lang_hooks.decls.pushdecl | |
5719 | (build_decl (UNKNOWN_LOCATION, | |
5720 | TYPE_DECL, get_identifier (pname), | |
5721 | ptype)); | |
ab2c1de8 | 5722 | |
acd6f472 | 5723 | } |
5724 | } | |
8a15c04a | 5725 | |
8a15c04a | 5726 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
2d47cc32 | 5727 | { |
5728 | va_list_arg_type_node = va_list_ref_type_node = | |
5729 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
5730 | } | |
8a15c04a | 5731 | else |
2d47cc32 | 5732 | { |
5733 | va_list_arg_type_node = va_list_type_node; | |
5734 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
5735 | } | |
1cae46be | 5736 | |
dce22712 | 5737 | if (!flag_preprocess_only) |
5738 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
ffa8918b | 5739 | |
5c62f199 | 5740 | main_identifier_node = get_identifier ("main"); |
ae84079f | 5741 | |
5742 | /* Create the built-in __null node. It is important that this is | |
5743 | not shared. */ | |
271e739a | 5744 | null_node = make_int_cst (1, 1); |
ae84079f | 5745 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); |
27213ba3 | 5746 | |
5747 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
5748 | memset (builtin_types, 0, sizeof (builtin_types)); | |
72040e7e | 5749 | } |
a66c9326 | 5750 | |
79b01846 | 5751 | /* The number of named compound-literals generated thus far. */ |
5752 | static GTY(()) int compound_literal_number; | |
5753 | ||
5754 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
5755 | ||
5756 | void | |
5757 | set_compound_literal_name (tree decl) | |
5758 | { | |
5759 | char *name; | |
5760 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
5761 | compound_literal_number); | |
5762 | compound_literal_number++; | |
5763 | DECL_NAME (decl) = get_identifier (name); | |
5764 | } | |
5765 | ||
a66c9326 | 5766 | tree |
e60a6f7b | 5767 | build_va_arg (location_t loc, tree expr, tree type) |
a66c9326 | 5768 | { |
e60a6f7b | 5769 | expr = build1 (VA_ARG_EXPR, type, expr); |
5770 | SET_EXPR_LOCATION (expr, loc); | |
5771 | return expr; | |
a66c9326 | 5772 | } |
0d4238dc | 5773 | |
5774 | ||
dd878098 | 5775 | /* Linked list of disabled built-in functions. */ |
5776 | ||
5777 | typedef struct disabled_builtin | |
5778 | { | |
5779 | const char *name; | |
5780 | struct disabled_builtin *next; | |
5781 | } disabled_builtin; | |
5782 | static disabled_builtin *disabled_builtins = NULL; | |
5783 | ||
1cae46be | 5784 | static bool builtin_function_disabled_p (const char *); |
dd878098 | 5785 | |
5786 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
5787 | begins with "__builtin_", give an error. */ | |
5788 | ||
5789 | void | |
1cae46be | 5790 | disable_builtin_function (const char *name) |
dd878098 | 5791 | { |
5792 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
b0b1af64 | 5793 | error ("cannot disable built-in function %qs", name); |
dd878098 | 5794 | else |
5795 | { | |
e85905e5 | 5796 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
5797 | new_disabled_builtin->name = name; | |
5798 | new_disabled_builtin->next = disabled_builtins; | |
5799 | disabled_builtins = new_disabled_builtin; | |
dd878098 | 5800 | } |
5801 | } | |
5802 | ||
5803 | ||
5804 | /* Return true if the built-in function NAME has been disabled, false | |
5805 | otherwise. */ | |
5806 | ||
5807 | static bool | |
1cae46be | 5808 | builtin_function_disabled_p (const char *name) |
dd878098 | 5809 | { |
5810 | disabled_builtin *p; | |
5811 | for (p = disabled_builtins; p != NULL; p = p->next) | |
5812 | { | |
5813 | if (strcmp (name, p->name) == 0) | |
5814 | return true; | |
5815 | } | |
5816 | return false; | |
5817 | } | |
5818 | ||
5819 | ||
3237155d | 5820 | /* Worker for DEF_BUILTIN. |
5821 | Possibly define a builtin function with one or two names. | |
5822 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
5823 | nonansi_p and flag_no_nonansi_builtin. */ | |
0d4238dc | 5824 | |
3237155d | 5825 | static void |
5826 | def_builtin_1 (enum built_in_function fncode, | |
5827 | const char *name, | |
5828 | enum built_in_class fnclass, | |
5829 | tree fntype, tree libtype, | |
5830 | bool both_p, bool fallback_p, bool nonansi_p, | |
5831 | tree fnattrs, bool implicit_p) | |
0d4238dc | 5832 | { |
3237155d | 5833 | tree decl; |
5834 | const char *libname; | |
5835 | ||
27213ba3 | 5836 | if (fntype == error_mark_node) |
5837 | return; | |
5838 | ||
3237155d | 5839 | gcc_assert ((!both_p && !fallback_p) |
5840 | || !strncmp (name, "__builtin_", | |
5841 | strlen ("__builtin_"))); | |
5842 | ||
5843 | libname = name + strlen ("__builtin_"); | |
54be5d7e | 5844 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
5845 | (fallback_p ? libname : NULL), | |
5846 | fnattrs); | |
b9a16870 | 5847 | |
5848 | set_builtin_decl (fncode, decl, implicit_p); | |
5849 | ||
3237155d | 5850 | if (both_p |
5851 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
dd878098 | 5852 | && !(nonansi_p && flag_no_nonansi_builtin)) |
54be5d7e | 5853 | add_builtin_function (libname, libtype, fncode, fnclass, |
5854 | NULL, fnattrs); | |
0d4238dc | 5855 | } |
e94026da | 5856 | \f |
d7aeef06 | 5857 | /* Nonzero if the type T promotes to int. This is (nearly) the |
5858 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
5859 | ||
5860 | bool | |
9f627b1a | 5861 | c_promoting_integer_type_p (const_tree t) |
d7aeef06 | 5862 | { |
5863 | switch (TREE_CODE (t)) | |
5864 | { | |
5865 | case INTEGER_TYPE: | |
5866 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
5867 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
5868 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
5869 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
7aa1e6eb | 5870 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
5871 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d7aeef06 | 5872 | |
5873 | case ENUMERAL_TYPE: | |
5874 | /* ??? Technically all enumerations not larger than an int | |
5875 | promote to an int. But this is used along code paths | |
5876 | that only want to notice a size change. */ | |
5877 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
5878 | ||
5879 | case BOOLEAN_TYPE: | |
5880 | return 1; | |
5881 | ||
5882 | default: | |
5883 | return 0; | |
5884 | } | |
5885 | } | |
5886 | ||
e94026da | 5887 | /* Return 1 if PARMS specifies a fixed number of parameters |
5888 | and none of their types is affected by default promotions. */ | |
5889 | ||
5890 | int | |
9f627b1a | 5891 | self_promoting_args_p (const_tree parms) |
e94026da | 5892 | { |
9f627b1a | 5893 | const_tree t; |
e94026da | 5894 | for (t = parms; t; t = TREE_CHAIN (t)) |
5895 | { | |
19cb6b50 | 5896 | tree type = TREE_VALUE (t); |
43f74bc4 | 5897 | |
e1d8e198 | 5898 | if (type == error_mark_node) |
5899 | continue; | |
5900 | ||
e94026da | 5901 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
5902 | return 0; | |
5903 | ||
5904 | if (type == 0) | |
5905 | return 0; | |
5906 | ||
5907 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
5908 | return 0; | |
5909 | ||
d7aeef06 | 5910 | if (c_promoting_integer_type_p (type)) |
e94026da | 5911 | return 0; |
5912 | } | |
5913 | return 1; | |
5914 | } | |
605fb01e | 5915 | |
c10de5e7 | 5916 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
5917 | tree | |
5918 | strip_pointer_operator (tree t) | |
5919 | { | |
5920 | while (POINTER_TYPE_P (t)) | |
5921 | t = TREE_TYPE (t); | |
5922 | return t; | |
5923 | } | |
5924 | ||
57a0ed23 | 5925 | /* Recursively remove pointer or array type from TYPE. */ |
5926 | tree | |
5927 | strip_pointer_or_array_types (tree t) | |
5928 | { | |
5929 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
5930 | t = TREE_TYPE (t); | |
5931 | return t; | |
5932 | } | |
5933 | ||
e41f0d80 | 5934 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
5935 | representing case labels, or NULL_TREE for a `default' label. | |
5936 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
5937 | K2, and 0 if K1 and K2 are equal. */ | |
5938 | ||
5939 | int | |
1cae46be | 5940 | case_compare (splay_tree_key k1, splay_tree_key k2) |
e41f0d80 | 5941 | { |
5942 | /* Consider a NULL key (such as arises with a `default' label) to be | |
5943 | smaller than anything else. */ | |
5944 | if (!k1) | |
5945 | return k2 ? -1 : 0; | |
5946 | else if (!k2) | |
5947 | return k1 ? 1 : 0; | |
5948 | ||
5949 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
5950 | } | |
5951 | ||
e60a6f7b | 5952 | /* Process a case label, located at LOC, for the range LOW_VALUE |
5953 | ... HIGH_VALUE. If LOW_VALUE and HIGH_VALUE are both NULL_TREE | |
5954 | then this case label is actually a `default' label. If only | |
5955 | HIGH_VALUE is NULL_TREE, then case label was declared using the | |
5956 | usual C/C++ syntax, rather than the GNU case range extension. | |
5957 | CASES is a tree containing all the case ranges processed so far; | |
5958 | COND is the condition for the switch-statement itself. Returns the | |
5959 | CASE_LABEL_EXPR created, or ERROR_MARK_NODE if no CASE_LABEL_EXPR | |
5960 | is created. */ | |
e41f0d80 | 5961 | |
5962 | tree | |
e60a6f7b | 5963 | c_add_case_label (location_t loc, splay_tree cases, tree cond, tree orig_type, |
2ca392fd | 5964 | tree low_value, tree high_value) |
e41f0d80 | 5965 | { |
5966 | tree type; | |
5967 | tree label; | |
5968 | tree case_label; | |
5969 | splay_tree_node node; | |
5970 | ||
5971 | /* Create the LABEL_DECL itself. */ | |
e60a6f7b | 5972 | label = create_artificial_label (loc); |
e41f0d80 | 5973 | |
5974 | /* If there was an error processing the switch condition, bail now | |
5975 | before we get more confused. */ | |
5976 | if (!cond || cond == error_mark_node) | |
4ee9c684 | 5977 | goto error_out; |
e41f0d80 | 5978 | |
1cae46be | 5979 | if ((low_value && TREE_TYPE (low_value) |
5980 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
e41f0d80 | 5981 | || (high_value && TREE_TYPE (high_value) |
5982 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
b96dc121 | 5983 | { |
e60a6f7b | 5984 | error_at (loc, "pointers are not permitted as case values"); |
b96dc121 | 5985 | goto error_out; |
5986 | } | |
e41f0d80 | 5987 | |
5988 | /* Case ranges are a GNU extension. */ | |
8864917d | 5989 | if (high_value) |
29438999 | 5990 | pedwarn (loc, OPT_Wpedantic, |
8864917d | 5991 | "range expressions in switch statements are non-standard"); |
e41f0d80 | 5992 | |
5993 | type = TREE_TYPE (cond); | |
5994 | if (low_value) | |
5995 | { | |
2d2f6a15 | 5996 | low_value = check_case_value (loc, low_value); |
22a75734 | 5997 | low_value = convert_and_check (loc, type, low_value); |
96722196 | 5998 | if (low_value == error_mark_node) |
5999 | goto error_out; | |
e41f0d80 | 6000 | } |
6001 | if (high_value) | |
6002 | { | |
2d2f6a15 | 6003 | high_value = check_case_value (loc, high_value); |
22a75734 | 6004 | high_value = convert_and_check (loc, type, high_value); |
96722196 | 6005 | if (high_value == error_mark_node) |
6006 | goto error_out; | |
e41f0d80 | 6007 | } |
6008 | ||
96722196 | 6009 | if (low_value && high_value) |
6010 | { | |
6011 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
a0c938f0 | 6012 | really a case range, even though it was written that way. |
6013 | Remove the HIGH_VALUE to simplify later processing. */ | |
96722196 | 6014 | if (tree_int_cst_equal (low_value, high_value)) |
6015 | high_value = NULL_TREE; | |
6016 | else if (!tree_int_cst_lt (low_value, high_value)) | |
e60a6f7b | 6017 | warning_at (loc, 0, "empty range specified"); |
96722196 | 6018 | } |
e41f0d80 | 6019 | |
2ca392fd | 6020 | /* See if the case is in range of the type of the original testing |
6021 | expression. If both low_value and high_value are out of range, | |
6022 | don't insert the case label and return NULL_TREE. */ | |
6023 | if (low_value | |
f61a9bc2 | 6024 | && !check_case_bounds (loc, type, orig_type, |
84166705 | 6025 | &low_value, high_value ? &high_value : NULL)) |
2ca392fd | 6026 | return NULL_TREE; |
6027 | ||
e41f0d80 | 6028 | /* Look up the LOW_VALUE in the table of case labels we already |
6029 | have. */ | |
6030 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
6031 | /* If there was not an exact match, check for overlapping ranges. | |
6032 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
6033 | that's a `default' label and the only overlap is an exact match. */ | |
6034 | if (!node && (low_value || high_value)) | |
6035 | { | |
6036 | splay_tree_node low_bound; | |
6037 | splay_tree_node high_bound; | |
6038 | ||
6039 | /* Even though there wasn't an exact match, there might be an | |
6040 | overlap between this case range and another case range. | |
6041 | Since we've (inductively) not allowed any overlapping case | |
6042 | ranges, we simply need to find the greatest low case label | |
6043 | that is smaller that LOW_VALUE, and the smallest low case | |
6044 | label that is greater than LOW_VALUE. If there is an overlap | |
6045 | it will occur in one of these two ranges. */ | |
6046 | low_bound = splay_tree_predecessor (cases, | |
6047 | (splay_tree_key) low_value); | |
6048 | high_bound = splay_tree_successor (cases, | |
6049 | (splay_tree_key) low_value); | |
6050 | ||
6051 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
6052 | the LOW_VALUE, so there is no need to check unless the | |
6053 | LOW_BOUND is in fact itself a case range. */ | |
6054 | if (low_bound | |
6055 | && CASE_HIGH ((tree) low_bound->value) | |
6056 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
6057 | low_value) >= 0) | |
6058 | node = low_bound; | |
6059 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
6060 | range is bigger than the low end of the current range, so we | |
6061 | are only interested if the current range is a real range, and | |
6062 | not an ordinary case label. */ | |
1cae46be | 6063 | else if (high_bound |
e41f0d80 | 6064 | && high_value |
6065 | && (tree_int_cst_compare ((tree) high_bound->key, | |
6066 | high_value) | |
6067 | <= 0)) | |
6068 | node = high_bound; | |
6069 | } | |
6070 | /* If there was an overlap, issue an error. */ | |
6071 | if (node) | |
6072 | { | |
eaae3b75 | 6073 | tree duplicate = CASE_LABEL ((tree) node->value); |
e41f0d80 | 6074 | |
6075 | if (high_value) | |
6076 | { | |
e60a6f7b | 6077 | error_at (loc, "duplicate (or overlapping) case value"); |
6078 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6079 | "this is the first entry overlapping that value"); | |
e41f0d80 | 6080 | } |
6081 | else if (low_value) | |
6082 | { | |
e60a6f7b | 6083 | error_at (loc, "duplicate case value") ; |
6084 | error_at (DECL_SOURCE_LOCATION (duplicate), "previously used here"); | |
e41f0d80 | 6085 | } |
6086 | else | |
6087 | { | |
e60a6f7b | 6088 | error_at (loc, "multiple default labels in one switch"); |
6089 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
6090 | "this is the first default label"); | |
e41f0d80 | 6091 | } |
4ee9c684 | 6092 | goto error_out; |
e41f0d80 | 6093 | } |
6094 | ||
6095 | /* Add a CASE_LABEL to the statement-tree. */ | |
b6e3dd65 | 6096 | case_label = add_stmt (build_case_label (low_value, high_value, label)); |
e41f0d80 | 6097 | /* Register this case label in the splay tree. */ |
1cae46be | 6098 | splay_tree_insert (cases, |
e41f0d80 | 6099 | (splay_tree_key) low_value, |
6100 | (splay_tree_value) case_label); | |
6101 | ||
6102 | return case_label; | |
4ee9c684 | 6103 | |
6104 | error_out: | |
daf6dff5 | 6105 | /* Add a label so that the back-end doesn't think that the beginning of |
4ee9c684 | 6106 | the switch is unreachable. Note that we do not add a case label, as |
a53ff4c1 | 6107 | that just leads to duplicates and thence to failure later on. */ |
4ee9c684 | 6108 | if (!cases->root) |
6109 | { | |
e60a6f7b | 6110 | tree t = create_artificial_label (loc); |
6111 | add_stmt (build_stmt (loc, LABEL_EXPR, t)); | |
4ee9c684 | 6112 | } |
6113 | return error_mark_node; | |
6114 | } | |
6115 | ||
6116 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
6117 | Used to verify that case values match up with enumerator values. */ | |
6118 | ||
6119 | static void | |
6120 | match_case_to_enum_1 (tree key, tree type, tree label) | |
6121 | { | |
e913b5cd | 6122 | char buf[WIDE_INT_PRINT_BUFFER_SIZE]; |
6123 | ||
dd76621f | 6124 | if (tree_fits_uhwi_p (key)) |
6125 | print_dec (key, buf, UNSIGNED); | |
6126 | else if (tree_fits_shwi_p (key)) | |
6127 | print_dec (key, buf, SIGNED); | |
4ee9c684 | 6128 | else |
e913b5cd | 6129 | print_hex (key, buf); |
4ee9c684 | 6130 | |
6131 | if (TYPE_NAME (type) == 0) | |
712d2297 | 6132 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6133 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6134 | "case value %qs not in enumerated type", | |
6135 | buf); | |
4ee9c684 | 6136 | else |
712d2297 | 6137 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
6138 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
6139 | "case value %qs not in enumerated type %qT", | |
6140 | buf, type); | |
4ee9c684 | 6141 | } |
6142 | ||
359d87c6 | 6143 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
6144 | Used to verify that case values match up with enumerator values. */ | |
6145 | ||
4ee9c684 | 6146 | static int |
6147 | match_case_to_enum (splay_tree_node node, void *data) | |
6148 | { | |
6149 | tree label = (tree) node->value; | |
4fd61bc6 | 6150 | tree type = (tree) data; |
4ee9c684 | 6151 | |
6152 | /* Skip default case. */ | |
6153 | if (!CASE_LOW (label)) | |
6154 | return 0; | |
6155 | ||
359d87c6 | 6156 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
4ee9c684 | 6157 | when we did our enum->case scan. Reset our scratch bit after. */ |
359d87c6 | 6158 | if (!CASE_LOW_SEEN (label)) |
4ee9c684 | 6159 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
6160 | else | |
359d87c6 | 6161 | CASE_LOW_SEEN (label) = 0; |
4ee9c684 | 6162 | |
359d87c6 | 6163 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
6164 | not set, that means that CASE_HIGH did not appear when we did our | |
6165 | enum->case scan. Reset our scratch bit after. */ | |
4ee9c684 | 6166 | if (CASE_HIGH (label)) |
6167 | { | |
359d87c6 | 6168 | if (!CASE_HIGH_SEEN (label)) |
6169 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
6170 | else | |
6171 | CASE_HIGH_SEEN (label) = 0; | |
4ee9c684 | 6172 | } |
6173 | ||
6174 | return 0; | |
6175 | } | |
6176 | ||
e7911019 | 6177 | /* Handle -Wswitch*. Called from the front end after parsing the |
6178 | switch construct. */ | |
6179 | /* ??? Should probably be somewhere generic, since other languages | |
6180 | besides C and C++ would want this. At the moment, however, C/C++ | |
6181 | are the only tree-ssa languages that support enumerations at all, | |
6182 | so the point is moot. */ | |
4ee9c684 | 6183 | |
e7911019 | 6184 | void |
6185 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
6186 | tree type, tree cond) | |
4ee9c684 | 6187 | { |
b27ac6b5 | 6188 | splay_tree_node default_node; |
359d87c6 | 6189 | splay_tree_node node; |
6190 | tree chain; | |
4ee9c684 | 6191 | |
6192 | if (!warn_switch && !warn_switch_enum && !warn_switch_default) | |
6193 | return; | |
6194 | ||
4ee9c684 | 6195 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
8b6866af | 6196 | if (!default_node) |
5fb6a912 | 6197 | warning_at (switch_location, OPT_Wswitch_default, |
6198 | "switch missing default case"); | |
4ee9c684 | 6199 | |
359d87c6 | 6200 | /* From here on, we only care about about enumerated types. */ |
6201 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) | |
6202 | return; | |
6203 | ||
561017b5 | 6204 | /* From here on, we only care about -Wswitch and -Wswitch-enum. */ |
6205 | if (!warn_switch_enum && !warn_switch) | |
359d87c6 | 6206 | return; |
6207 | ||
561017b5 | 6208 | /* Check the cases. Warn about case values which are not members of |
6209 | the enumerated type. For -Wswitch-enum, or for -Wswitch when | |
6210 | there is no default case, check that exactly all enumeration | |
6211 | literals are covered by the cases. */ | |
6212 | ||
359d87c6 | 6213 | /* Clearing COND if it is not an integer constant simplifies |
6214 | the tests inside the loop below. */ | |
6215 | if (TREE_CODE (cond) != INTEGER_CST) | |
6216 | cond = NULL_TREE; | |
6217 | ||
6218 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
6219 | common case of monotonically increasing enumerators, it is | |
6220 | O(N), since the nature of the splay tree will keep the next | |
6221 | element adjacent to the root at all times. */ | |
4ee9c684 | 6222 | |
359d87c6 | 6223 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
6224 | { | |
6225 | tree value = TREE_VALUE (chain); | |
3f00a6c0 | 6226 | if (TREE_CODE (value) == CONST_DECL) |
6227 | value = DECL_INITIAL (value); | |
359d87c6 | 6228 | node = splay_tree_lookup (cases, (splay_tree_key) value); |
6229 | if (node) | |
4ee9c684 | 6230 | { |
359d87c6 | 6231 | /* Mark the CASE_LOW part of the case entry as seen. */ |
6232 | tree label = (tree) node->value; | |
6233 | CASE_LOW_SEEN (label) = 1; | |
6234 | continue; | |
6235 | } | |
6236 | ||
6237 | /* Even though there wasn't an exact match, there might be a | |
f0b5f617 | 6238 | case range which includes the enumerator's value. */ |
359d87c6 | 6239 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
6240 | if (node && CASE_HIGH ((tree) node->value)) | |
6241 | { | |
6242 | tree label = (tree) node->value; | |
6243 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
6244 | if (cmp >= 0) | |
4ee9c684 | 6245 | { |
359d87c6 | 6246 | /* If we match the upper bound exactly, mark the CASE_HIGH |
6247 | part of the case entry as seen. */ | |
6248 | if (cmp == 0) | |
6249 | CASE_HIGH_SEEN (label) = 1; | |
6250 | continue; | |
4ee9c684 | 6251 | } |
6252 | } | |
6253 | ||
359d87c6 | 6254 | /* We've now determined that this enumerated literal isn't |
6255 | handled by the case labels of the switch statement. */ | |
4ee9c684 | 6256 | |
359d87c6 | 6257 | /* If the switch expression is a constant, we only really care |
6258 | about whether that constant is handled by the switch. */ | |
6259 | if (cond && tree_int_cst_compare (cond, value)) | |
6260 | continue; | |
4ee9c684 | 6261 | |
6cbbbc89 | 6262 | /* If there is a default_node, the only relevant option is |
561017b5 | 6263 | Wswitch-enum. Otherwise, if both are enabled then we prefer |
6cbbbc89 | 6264 | to warn using -Wswitch because -Wswitch is enabled by -Wall |
6265 | while -Wswitch-enum is explicit. */ | |
561017b5 | 6266 | warning_at (switch_location, |
6267 | (default_node || !warn_switch | |
6268 | ? OPT_Wswitch_enum | |
6269 | : OPT_Wswitch), | |
6270 | "enumeration value %qE not handled in switch", | |
6271 | TREE_PURPOSE (chain)); | |
4ee9c684 | 6272 | } |
359d87c6 | 6273 | |
6274 | /* Warn if there are case expressions that don't correspond to | |
6275 | enumerators. This can occur since C and C++ don't enforce | |
6276 | type-checking of assignments to enumeration variables. | |
6277 | ||
6278 | The time complexity here is now always O(N) worst case, since | |
6279 | we should have marked both the lower bound and upper bound of | |
6280 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
6281 | above. This scan also resets those fields. */ | |
6cbbbc89 | 6282 | |
359d87c6 | 6283 | splay_tree_foreach (cases, match_case_to_enum, type); |
e41f0d80 | 6284 | } |
6285 | ||
9dd48740 | 6286 | /* Finish an expression taking the address of LABEL (an |
dda49785 | 6287 | IDENTIFIER_NODE). Returns an expression for the address. |
6288 | ||
6289 | LOC is the location for the expression returned. */ | |
d0a47c8d | 6290 | |
1cae46be | 6291 | tree |
dda49785 | 6292 | finish_label_address_expr (tree label, location_t loc) |
d0a47c8d | 6293 | { |
6294 | tree result; | |
6295 | ||
29438999 | 6296 | pedwarn (input_location, OPT_Wpedantic, "taking the address of a label is non-standard"); |
d0a47c8d | 6297 | |
9dd48740 | 6298 | if (label == error_mark_node) |
6299 | return error_mark_node; | |
6300 | ||
d0a47c8d | 6301 | label = lookup_label (label); |
6302 | if (label == NULL_TREE) | |
6303 | result = null_pointer_node; | |
6304 | else | |
6305 | { | |
6306 | TREE_USED (label) = 1; | |
6307 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
344cd9b2 | 6308 | /* The current function is not necessarily uninlinable. |
d0a47c8d | 6309 | Computed gotos are incompatible with inlining, but the value |
6310 | here could be used only in a diagnostic, for example. */ | |
dda49785 | 6311 | protected_set_expr_location (result, loc); |
d0a47c8d | 6312 | } |
6313 | ||
6314 | return result; | |
6315 | } | |
4f9a1c9b | 6316 | \f |
6317 | ||
6318 | /* Given a boolean expression ARG, return a tree representing an increment | |
6319 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
6320 | invalid cases (e.g., decrement in C++). */ | |
6321 | tree | |
1cae46be | 6322 | boolean_increment (enum tree_code code, tree arg) |
4f9a1c9b | 6323 | { |
6324 | tree val; | |
69db191c | 6325 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
c0f19401 | 6326 | |
4f9a1c9b | 6327 | arg = stabilize_reference (arg); |
6328 | switch (code) | |
6329 | { | |
6330 | case PREINCREMENT_EXPR: | |
14ae0310 | 6331 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 6332 | break; |
6333 | case POSTINCREMENT_EXPR: | |
14ae0310 | 6334 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 6335 | arg = save_expr (arg); |
14ae0310 | 6336 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6337 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 6338 | break; |
6339 | case PREDECREMENT_EXPR: | |
14ae0310 | 6340 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 6341 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 6342 | break; |
6343 | case POSTDECREMENT_EXPR: | |
14ae0310 | 6344 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 6345 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 6346 | arg = save_expr (arg); |
14ae0310 | 6347 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
6348 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 6349 | break; |
6350 | default: | |
231bd014 | 6351 | gcc_unreachable (); |
4f9a1c9b | 6352 | } |
6353 | TREE_SIDE_EFFECTS (val) = 1; | |
6354 | return val; | |
6355 | } | |
76a6e674 | 6356 | \f |
f3449a3c | 6357 | /* Built-in macros for stddef.h and stdint.h, that require macros |
6358 | defined in this file. */ | |
79cf3ec1 | 6359 | void |
1cae46be | 6360 | c_stddef_cpp_builtins(void) |
1ed9d5f5 | 6361 | { |
63994318 | 6362 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
6363 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
6364 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
6365 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
36bccbfc | 6366 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
6367 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
b0726616 | 6368 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
6369 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
f3449a3c | 6370 | if (SIG_ATOMIC_TYPE) |
6371 | builtin_define_with_value ("__SIG_ATOMIC_TYPE__", SIG_ATOMIC_TYPE, 0); | |
6372 | if (INT8_TYPE) | |
6373 | builtin_define_with_value ("__INT8_TYPE__", INT8_TYPE, 0); | |
6374 | if (INT16_TYPE) | |
6375 | builtin_define_with_value ("__INT16_TYPE__", INT16_TYPE, 0); | |
6376 | if (INT32_TYPE) | |
6377 | builtin_define_with_value ("__INT32_TYPE__", INT32_TYPE, 0); | |
6378 | if (INT64_TYPE) | |
6379 | builtin_define_with_value ("__INT64_TYPE__", INT64_TYPE, 0); | |
6380 | if (UINT8_TYPE) | |
6381 | builtin_define_with_value ("__UINT8_TYPE__", UINT8_TYPE, 0); | |
6382 | if (UINT16_TYPE) | |
6383 | builtin_define_with_value ("__UINT16_TYPE__", UINT16_TYPE, 0); | |
6384 | if (UINT32_TYPE) | |
6385 | builtin_define_with_value ("__UINT32_TYPE__", UINT32_TYPE, 0); | |
6386 | if (UINT64_TYPE) | |
6387 | builtin_define_with_value ("__UINT64_TYPE__", UINT64_TYPE, 0); | |
6388 | if (INT_LEAST8_TYPE) | |
6389 | builtin_define_with_value ("__INT_LEAST8_TYPE__", INT_LEAST8_TYPE, 0); | |
6390 | if (INT_LEAST16_TYPE) | |
6391 | builtin_define_with_value ("__INT_LEAST16_TYPE__", INT_LEAST16_TYPE, 0); | |
6392 | if (INT_LEAST32_TYPE) | |
6393 | builtin_define_with_value ("__INT_LEAST32_TYPE__", INT_LEAST32_TYPE, 0); | |
6394 | if (INT_LEAST64_TYPE) | |
6395 | builtin_define_with_value ("__INT_LEAST64_TYPE__", INT_LEAST64_TYPE, 0); | |
6396 | if (UINT_LEAST8_TYPE) | |
6397 | builtin_define_with_value ("__UINT_LEAST8_TYPE__", UINT_LEAST8_TYPE, 0); | |
6398 | if (UINT_LEAST16_TYPE) | |
6399 | builtin_define_with_value ("__UINT_LEAST16_TYPE__", UINT_LEAST16_TYPE, 0); | |
6400 | if (UINT_LEAST32_TYPE) | |
6401 | builtin_define_with_value ("__UINT_LEAST32_TYPE__", UINT_LEAST32_TYPE, 0); | |
6402 | if (UINT_LEAST64_TYPE) | |
6403 | builtin_define_with_value ("__UINT_LEAST64_TYPE__", UINT_LEAST64_TYPE, 0); | |
6404 | if (INT_FAST8_TYPE) | |
6405 | builtin_define_with_value ("__INT_FAST8_TYPE__", INT_FAST8_TYPE, 0); | |
6406 | if (INT_FAST16_TYPE) | |
6407 | builtin_define_with_value ("__INT_FAST16_TYPE__", INT_FAST16_TYPE, 0); | |
6408 | if (INT_FAST32_TYPE) | |
6409 | builtin_define_with_value ("__INT_FAST32_TYPE__", INT_FAST32_TYPE, 0); | |
6410 | if (INT_FAST64_TYPE) | |
6411 | builtin_define_with_value ("__INT_FAST64_TYPE__", INT_FAST64_TYPE, 0); | |
6412 | if (UINT_FAST8_TYPE) | |
6413 | builtin_define_with_value ("__UINT_FAST8_TYPE__", UINT_FAST8_TYPE, 0); | |
6414 | if (UINT_FAST16_TYPE) | |
6415 | builtin_define_with_value ("__UINT_FAST16_TYPE__", UINT_FAST16_TYPE, 0); | |
6416 | if (UINT_FAST32_TYPE) | |
6417 | builtin_define_with_value ("__UINT_FAST32_TYPE__", UINT_FAST32_TYPE, 0); | |
6418 | if (UINT_FAST64_TYPE) | |
6419 | builtin_define_with_value ("__UINT_FAST64_TYPE__", UINT_FAST64_TYPE, 0); | |
6420 | if (INTPTR_TYPE) | |
6421 | builtin_define_with_value ("__INTPTR_TYPE__", INTPTR_TYPE, 0); | |
6422 | if (UINTPTR_TYPE) | |
6423 | builtin_define_with_value ("__UINTPTR_TYPE__", UINTPTR_TYPE, 0); | |
574006c3 | 6424 | } |
6425 | ||
7d3b509a | 6426 | static void |
1cae46be | 6427 | c_init_attributes (void) |
7d3b509a | 6428 | { |
6429 | /* Fill in the built_in_attributes array. */ | |
7c446c95 | 6430 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
7d3b509a | 6431 | built_in_attributes[(int) ENUM] = NULL_TREE; |
7c446c95 | 6432 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
ceb7b692 | 6433 | built_in_attributes[(int) ENUM] = build_int_cst (integer_type_node, VALUE); |
c8010b80 | 6434 | #define DEF_ATTR_STRING(ENUM, VALUE) \ |
6435 | built_in_attributes[(int) ENUM] = build_string (strlen (VALUE), VALUE); | |
7d3b509a | 6436 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
6437 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
6438 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
6439 | built_in_attributes[(int) ENUM] \ | |
6440 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
6441 | built_in_attributes[(int) VALUE], \ | |
6442 | built_in_attributes[(int) CHAIN]); | |
7d3b509a | 6443 | #include "builtin-attrs.def" |
6444 | #undef DEF_ATTR_NULL_TREE | |
6445 | #undef DEF_ATTR_INT | |
6446 | #undef DEF_ATTR_IDENT | |
6447 | #undef DEF_ATTR_TREE_LIST | |
76a6e674 | 6448 | } |
5f3cead1 | 6449 | |
33199a81 | 6450 | /* Returns TRUE iff the attribute indicated by ATTR_ID takes a plain |
6451 | identifier as an argument, so the front end shouldn't look it up. */ | |
6452 | ||
6453 | bool | |
47b19b94 | 6454 | attribute_takes_identifier_p (const_tree attr_id) |
33199a81 | 6455 | { |
9bf1c74e | 6456 | const struct attribute_spec *spec = lookup_attribute_spec (attr_id); |
02cb1060 | 6457 | if (spec == NULL) |
6458 | /* Unknown attribute that we'll end up ignoring, return true so we | |
6459 | don't complain about an identifier argument. */ | |
6460 | return true; | |
6461 | else if (!strcmp ("mode", spec->name) | |
6462 | || !strcmp ("format", spec->name) | |
6463 | || !strcmp ("cleanup", spec->name)) | |
47b19b94 | 6464 | return true; |
6465 | else | |
6466 | return targetm.attribute_takes_identifier_p (attr_id); | |
33199a81 | 6467 | } |
6468 | ||
f8e93a2e | 6469 | /* Attribute handlers common to C front ends. */ |
6470 | ||
6471 | /* Handle a "packed" attribute; arguments as in | |
6472 | struct attribute_spec.handler. */ | |
6473 | ||
6474 | static tree | |
9a03a746 | 6475 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
09347743 | 6476 | int flags, bool *no_add_attrs) |
f8e93a2e | 6477 | { |
f40175cb | 6478 | if (TYPE_P (*node)) |
f8e93a2e | 6479 | { |
6480 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 6481 | *node = build_variant_type_copy (*node); |
f40175cb | 6482 | TYPE_PACKED (*node) = 1; |
f8e93a2e | 6483 | } |
6484 | else if (TREE_CODE (*node) == FIELD_DECL) | |
c2ab04f9 | 6485 | { |
9fd767c5 | 6486 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT |
6487 | /* Still pack bitfields. */ | |
6488 | && ! DECL_INITIAL (*node)) | |
c2ab04f9 | 6489 | warning (OPT_Wattributes, |
6490 | "%qE attribute ignored for field of type %qT", | |
6491 | name, TREE_TYPE (*node)); | |
6492 | else | |
6493 | DECL_PACKED (*node) = 1; | |
6494 | } | |
f8e93a2e | 6495 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
f40175cb | 6496 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
6497 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
6498 | that changes what the typedef is typing. */ | |
f8e93a2e | 6499 | else |
6500 | { | |
9b2d6d13 | 6501 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6502 | *no_add_attrs = true; |
6503 | } | |
6504 | ||
6505 | return NULL_TREE; | |
6506 | } | |
6507 | ||
6508 | /* Handle a "nocommon" attribute; arguments as in | |
6509 | struct attribute_spec.handler. */ | |
6510 | ||
6511 | static tree | |
1cae46be | 6512 | handle_nocommon_attribute (tree *node, tree name, |
9a03a746 | 6513 | tree ARG_UNUSED (args), |
6514 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6515 | { |
6516 | if (TREE_CODE (*node) == VAR_DECL) | |
6517 | DECL_COMMON (*node) = 0; | |
6518 | else | |
6519 | { | |
9b2d6d13 | 6520 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6521 | *no_add_attrs = true; |
6522 | } | |
6523 | ||
6524 | return NULL_TREE; | |
6525 | } | |
6526 | ||
6527 | /* Handle a "common" attribute; arguments as in | |
6528 | struct attribute_spec.handler. */ | |
6529 | ||
6530 | static tree | |
9a03a746 | 6531 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6532 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6533 | { |
6534 | if (TREE_CODE (*node) == VAR_DECL) | |
6535 | DECL_COMMON (*node) = 1; | |
6536 | else | |
6537 | { | |
9b2d6d13 | 6538 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6539 | *no_add_attrs = true; |
6540 | } | |
6541 | ||
6542 | return NULL_TREE; | |
6543 | } | |
6544 | ||
6545 | /* Handle a "noreturn" attribute; arguments as in | |
6546 | struct attribute_spec.handler. */ | |
6547 | ||
6548 | static tree | |
9a03a746 | 6549 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6550 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6551 | { |
6552 | tree type = TREE_TYPE (*node); | |
6553 | ||
6554 | /* See FIXME comment in c_common_attribute_table. */ | |
8c582e4f | 6555 | if (TREE_CODE (*node) == FUNCTION_DECL |
6556 | || objc_method_decl (TREE_CODE (*node))) | |
f8e93a2e | 6557 | TREE_THIS_VOLATILE (*node) = 1; |
6558 | else if (TREE_CODE (type) == POINTER_TYPE | |
6559 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
6560 | TREE_TYPE (*node) | |
9d4eeb52 | 6561 | = (build_qualified_type |
6562 | (build_pointer_type | |
6563 | (build_type_variant (TREE_TYPE (type), | |
6564 | TYPE_READONLY (TREE_TYPE (type)), 1)), | |
6565 | TYPE_QUALS (type))); | |
f8e93a2e | 6566 | else |
6567 | { | |
9b2d6d13 | 6568 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6569 | *no_add_attrs = true; |
6570 | } | |
6571 | ||
6572 | return NULL_TREE; | |
6573 | } | |
6574 | ||
5de92639 | 6575 | /* Handle a "hot" and attribute; arguments as in |
6576 | struct attribute_spec.handler. */ | |
6577 | ||
6578 | static tree | |
6579 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
46f8e3b0 | 6580 | int ARG_UNUSED (flags), bool *no_add_attrs) |
5de92639 | 6581 | { |
758a38ab | 6582 | if (TREE_CODE (*node) == FUNCTION_DECL |
6583 | || TREE_CODE (*node) == LABEL_DECL) | |
5de92639 | 6584 | { |
6585 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
6586 | { | |
4a026b48 | 6587 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
6588 | "with attribute %qs", name, "cold"); | |
5de92639 | 6589 | *no_add_attrs = true; |
6590 | } | |
24470055 | 6591 | /* Most of the rest of the hot processing is done later with |
6592 | lookup_attribute. */ | |
5de92639 | 6593 | } |
6594 | else | |
6595 | { | |
6596 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6597 | *no_add_attrs = true; | |
6598 | } | |
6599 | ||
6600 | return NULL_TREE; | |
6601 | } | |
758a38ab | 6602 | |
5de92639 | 6603 | /* Handle a "cold" and attribute; arguments as in |
6604 | struct attribute_spec.handler. */ | |
6605 | ||
6606 | static tree | |
6607 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
6608 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6609 | { | |
758a38ab | 6610 | if (TREE_CODE (*node) == FUNCTION_DECL |
6611 | || TREE_CODE (*node) == LABEL_DECL) | |
5de92639 | 6612 | { |
6613 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
6614 | { | |
4a026b48 | 6615 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
6616 | "with attribute %qs", name, "hot"); | |
5de92639 | 6617 | *no_add_attrs = true; |
6618 | } | |
24470055 | 6619 | /* Most of the rest of the cold processing is done later with |
6620 | lookup_attribute. */ | |
5de92639 | 6621 | } |
6622 | else | |
6623 | { | |
6624 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6625 | *no_add_attrs = true; | |
6626 | } | |
6627 | ||
6628 | return NULL_TREE; | |
6629 | } | |
6630 | ||
a9196da9 | 6631 | /* Handle a "no_sanitize_address" attribute; arguments as in |
d413ffdd | 6632 | struct attribute_spec.handler. */ |
6633 | ||
6634 | static tree | |
a9196da9 | 6635 | handle_no_sanitize_address_attribute (tree *node, tree name, tree, int, |
6636 | bool *no_add_attrs) | |
d413ffdd | 6637 | { |
6638 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
6639 | { | |
6640 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6641 | *no_add_attrs = true; | |
6642 | } | |
6643 | ||
6644 | return NULL_TREE; | |
6645 | } | |
6646 | ||
a9196da9 | 6647 | /* Handle a "no_address_safety_analysis" attribute; arguments as in |
6648 | struct attribute_spec.handler. */ | |
6649 | ||
6650 | static tree | |
6651 | handle_no_address_safety_analysis_attribute (tree *node, tree name, tree, int, | |
6652 | bool *no_add_attrs) | |
6653 | { | |
6654 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
6655 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6656 | else if (!lookup_attribute ("no_sanitize_address", DECL_ATTRIBUTES (*node))) | |
6657 | DECL_ATTRIBUTES (*node) | |
6658 | = tree_cons (get_identifier ("no_sanitize_address"), | |
6659 | NULL_TREE, DECL_ATTRIBUTES (*node)); | |
6660 | *no_add_attrs = true; | |
6661 | return NULL_TREE; | |
6662 | } | |
6663 | ||
05f893e1 | 6664 | /* Handle a "no_sanitize_undefined" attribute; arguments as in |
6665 | struct attribute_spec.handler. */ | |
6666 | ||
6667 | static tree | |
6668 | handle_no_sanitize_undefined_attribute (tree *node, tree name, tree, int, | |
6669 | bool *no_add_attrs) | |
6670 | { | |
6671 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
6672 | { | |
6673 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6674 | *no_add_attrs = true; | |
6675 | } | |
6676 | ||
6677 | return NULL_TREE; | |
6678 | } | |
6679 | ||
f8e93a2e | 6680 | /* Handle a "noinline" attribute; arguments as in |
6681 | struct attribute_spec.handler. */ | |
6682 | ||
6683 | static tree | |
1cae46be | 6684 | handle_noinline_attribute (tree *node, tree name, |
9a03a746 | 6685 | tree ARG_UNUSED (args), |
6686 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6687 | { |
6688 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
4a026b48 | 6689 | { |
6690 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (*node))) | |
6691 | { | |
6692 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
6693 | "with attribute %qs", name, "always_inline"); | |
6694 | *no_add_attrs = true; | |
6695 | } | |
6696 | else | |
6697 | DECL_UNINLINABLE (*node) = 1; | |
6698 | } | |
f8e93a2e | 6699 | else |
6700 | { | |
9b2d6d13 | 6701 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6702 | *no_add_attrs = true; |
6703 | } | |
6704 | ||
6705 | return NULL_TREE; | |
6706 | } | |
6707 | ||
bdb1f0d1 | 6708 | /* Handle a "noclone" attribute; arguments as in |
6709 | struct attribute_spec.handler. */ | |
6710 | ||
6711 | static tree | |
6712 | handle_noclone_attribute (tree *node, tree name, | |
6713 | tree ARG_UNUSED (args), | |
6714 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6715 | { | |
6716 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
6717 | { | |
6718 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6719 | *no_add_attrs = true; | |
6720 | } | |
6721 | ||
6722 | return NULL_TREE; | |
6723 | } | |
6724 | ||
f8e93a2e | 6725 | /* Handle a "always_inline" attribute; arguments as in |
6726 | struct attribute_spec.handler. */ | |
6727 | ||
6728 | static tree | |
1cae46be | 6729 | handle_always_inline_attribute (tree *node, tree name, |
9a03a746 | 6730 | tree ARG_UNUSED (args), |
6731 | int ARG_UNUSED (flags), | |
09347743 | 6732 | bool *no_add_attrs) |
f8e93a2e | 6733 | { |
6734 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6735 | { | |
4a026b48 | 6736 | if (lookup_attribute ("noinline", DECL_ATTRIBUTES (*node))) |
6737 | { | |
6738 | warning (OPT_Wattributes, "%qE attribute ignored due to conflict " | |
6739 | "with %qs attribute", name, "noinline"); | |
6740 | *no_add_attrs = true; | |
6741 | } | |
6742 | else | |
6743 | /* Set the attribute and mark it for disregarding inline | |
6744 | limits. */ | |
6745 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
f8e93a2e | 6746 | } |
6747 | else | |
6748 | { | |
9b2d6d13 | 6749 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6750 | *no_add_attrs = true; |
541e4101 | 6751 | } |
6752 | ||
6753 | return NULL_TREE; | |
6754 | } | |
6755 | ||
6756 | /* Handle a "gnu_inline" attribute; arguments as in | |
6757 | struct attribute_spec.handler. */ | |
6758 | ||
6759 | static tree | |
6760 | handle_gnu_inline_attribute (tree *node, tree name, | |
6761 | tree ARG_UNUSED (args), | |
6762 | int ARG_UNUSED (flags), | |
6763 | bool *no_add_attrs) | |
6764 | { | |
6765 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
6766 | { | |
6767 | /* Do nothing else, just set the attribute. We'll get at | |
6768 | it later with lookup_attribute. */ | |
6769 | } | |
6770 | else | |
6771 | { | |
6772 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6773 | *no_add_attrs = true; | |
7bd95dfd | 6774 | } |
6775 | ||
6776 | return NULL_TREE; | |
6777 | } | |
6778 | ||
6779 | /* Handle a "leaf" attribute; arguments as in | |
6780 | struct attribute_spec.handler. */ | |
6781 | ||
6782 | static tree | |
6783 | handle_leaf_attribute (tree *node, tree name, | |
6784 | tree ARG_UNUSED (args), | |
6785 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6786 | { | |
6787 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
6788 | { | |
6789 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6790 | *no_add_attrs = true; | |
6791 | } | |
6792 | if (!TREE_PUBLIC (*node)) | |
6793 | { | |
6794 | warning (OPT_Wattributes, "%qE attribute has no effect on unit local functions", name); | |
6795 | *no_add_attrs = true; | |
f8e93a2e | 6796 | } |
6797 | ||
6798 | return NULL_TREE; | |
6799 | } | |
6800 | ||
1b16fc45 | 6801 | /* Handle an "artificial" attribute; arguments as in |
6802 | struct attribute_spec.handler. */ | |
6803 | ||
6804 | static tree | |
6805 | handle_artificial_attribute (tree *node, tree name, | |
6806 | tree ARG_UNUSED (args), | |
6807 | int ARG_UNUSED (flags), | |
6808 | bool *no_add_attrs) | |
6809 | { | |
6810 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
6811 | { | |
6812 | /* Do nothing else, just set the attribute. We'll get at | |
6813 | it later with lookup_attribute. */ | |
6814 | } | |
6815 | else | |
6816 | { | |
6817 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6818 | *no_add_attrs = true; | |
6819 | } | |
6820 | ||
6821 | return NULL_TREE; | |
6822 | } | |
6823 | ||
0cdd9887 | 6824 | /* Handle a "flatten" attribute; arguments as in |
6825 | struct attribute_spec.handler. */ | |
6826 | ||
6827 | static tree | |
6828 | handle_flatten_attribute (tree *node, tree name, | |
a0c938f0 | 6829 | tree args ATTRIBUTE_UNUSED, |
6830 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0cdd9887 | 6831 | { |
6832 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6833 | /* Do nothing else, just set the attribute. We'll get at | |
6834 | it later with lookup_attribute. */ | |
6835 | ; | |
6836 | else | |
6837 | { | |
6838 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6839 | *no_add_attrs = true; | |
6840 | } | |
6841 | ||
6842 | return NULL_TREE; | |
6843 | } | |
6844 | ||
10fc867f | 6845 | /* Handle a "warning" or "error" attribute; arguments as in |
6846 | struct attribute_spec.handler. */ | |
6847 | ||
6848 | static tree | |
6849 | handle_error_attribute (tree *node, tree name, tree args, | |
6850 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6851 | { | |
6852 | if (TREE_CODE (*node) == FUNCTION_DECL | |
df936998 | 6853 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) |
10fc867f | 6854 | /* Do nothing else, just set the attribute. We'll get at |
6855 | it later with lookup_attribute. */ | |
6856 | ; | |
6857 | else | |
6858 | { | |
6859 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6860 | *no_add_attrs = true; | |
6861 | } | |
6862 | ||
6863 | return NULL_TREE; | |
6864 | } | |
0cdd9887 | 6865 | |
f8e93a2e | 6866 | /* Handle a "used" attribute; arguments as in |
6867 | struct attribute_spec.handler. */ | |
6868 | ||
6869 | static tree | |
9a03a746 | 6870 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
6871 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6872 | { |
d0a31bd8 | 6873 | tree node = *pnode; |
6874 | ||
6875 | if (TREE_CODE (node) == FUNCTION_DECL | |
a4e3ffad | 6876 | || (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node)) |
6877 | || (TREE_CODE (node) == TYPE_DECL)) | |
f54ed8bc | 6878 | { |
f54ed8bc | 6879 | TREE_USED (node) = 1; |
9423c9b7 | 6880 | DECL_PRESERVE_P (node) = 1; |
abc6c64f | 6881 | if (TREE_CODE (node) == VAR_DECL) |
6882 | DECL_READ_P (node) = 1; | |
f54ed8bc | 6883 | } |
f8e93a2e | 6884 | else |
6885 | { | |
9b2d6d13 | 6886 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6887 | *no_add_attrs = true; |
6888 | } | |
6889 | ||
6890 | return NULL_TREE; | |
6891 | } | |
6892 | ||
6893 | /* Handle a "unused" attribute; arguments as in | |
6894 | struct attribute_spec.handler. */ | |
6895 | ||
6896 | static tree | |
9a03a746 | 6897 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6898 | int flags, bool *no_add_attrs) | |
f8e93a2e | 6899 | { |
6900 | if (DECL_P (*node)) | |
6901 | { | |
6902 | tree decl = *node; | |
6903 | ||
6904 | if (TREE_CODE (decl) == PARM_DECL | |
6905 | || TREE_CODE (decl) == VAR_DECL | |
6906 | || TREE_CODE (decl) == FUNCTION_DECL | |
6907 | || TREE_CODE (decl) == LABEL_DECL | |
6908 | || TREE_CODE (decl) == TYPE_DECL) | |
abc6c64f | 6909 | { |
6910 | TREE_USED (decl) = 1; | |
6911 | if (TREE_CODE (decl) == VAR_DECL | |
6912 | || TREE_CODE (decl) == PARM_DECL) | |
6913 | DECL_READ_P (decl) = 1; | |
6914 | } | |
f8e93a2e | 6915 | else |
6916 | { | |
9b2d6d13 | 6917 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6918 | *no_add_attrs = true; |
6919 | } | |
6920 | } | |
6921 | else | |
6922 | { | |
6923 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 6924 | *node = build_variant_type_copy (*node); |
f8e93a2e | 6925 | TREE_USED (*node) = 1; |
6926 | } | |
6927 | ||
6928 | return NULL_TREE; | |
6929 | } | |
6930 | ||
62eec3b4 | 6931 | /* Handle a "externally_visible" attribute; arguments as in |
6932 | struct attribute_spec.handler. */ | |
6933 | ||
6934 | static tree | |
6935 | handle_externally_visible_attribute (tree *pnode, tree name, | |
6936 | tree ARG_UNUSED (args), | |
6937 | int ARG_UNUSED (flags), | |
6938 | bool *no_add_attrs) | |
6939 | { | |
6940 | tree node = *pnode; | |
6941 | ||
ba12ea31 | 6942 | if (TREE_CODE (node) == FUNCTION_DECL || TREE_CODE (node) == VAR_DECL) |
62eec3b4 | 6943 | { |
ba12ea31 | 6944 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
6945 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
6946 | { | |
6947 | warning (OPT_Wattributes, | |
6948 | "%qE attribute have effect only on public objects", name); | |
6949 | *no_add_attrs = true; | |
6950 | } | |
62eec3b4 | 6951 | } |
62eec3b4 | 6952 | else |
6953 | { | |
6954 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6955 | *no_add_attrs = true; | |
6956 | } | |
6957 | ||
6958 | return NULL_TREE; | |
6959 | } | |
6960 | ||
f8e93a2e | 6961 | /* Handle a "const" attribute; arguments as in |
6962 | struct attribute_spec.handler. */ | |
6963 | ||
6964 | static tree | |
9a03a746 | 6965 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6966 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6967 | { |
6968 | tree type = TREE_TYPE (*node); | |
6969 | ||
6970 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
6971 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6972 | TREE_READONLY (*node) = 1; | |
6973 | else if (TREE_CODE (type) == POINTER_TYPE | |
6974 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
6975 | TREE_TYPE (*node) | |
9d4eeb52 | 6976 | = (build_qualified_type |
6977 | (build_pointer_type | |
6978 | (build_type_variant (TREE_TYPE (type), 1, | |
6979 | TREE_THIS_VOLATILE (TREE_TYPE (type)))), | |
6980 | TYPE_QUALS (type))); | |
f8e93a2e | 6981 | else |
6982 | { | |
9b2d6d13 | 6983 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6984 | *no_add_attrs = true; |
6985 | } | |
6986 | ||
6987 | return NULL_TREE; | |
6988 | } | |
6989 | ||
6990 | /* Handle a "transparent_union" attribute; arguments as in | |
6991 | struct attribute_spec.handler. */ | |
6992 | ||
6993 | static tree | |
1cae46be | 6994 | handle_transparent_union_attribute (tree *node, tree name, |
9a03a746 | 6995 | tree ARG_UNUSED (args), int flags, |
09347743 | 6996 | bool *no_add_attrs) |
f8e93a2e | 6997 | { |
881eb642 | 6998 | tree type; |
03908818 | 6999 | |
7000 | *no_add_attrs = true; | |
f8e93a2e | 7001 | |
ffcdbf9c | 7002 | |
7003 | if (TREE_CODE (*node) == TYPE_DECL | |
7004 | && ! (flags & ATTR_FLAG_CXX11)) | |
881eb642 | 7005 | node = &TREE_TYPE (*node); |
7006 | type = *node; | |
f8e93a2e | 7007 | |
03908818 | 7008 | if (TREE_CODE (type) == UNION_TYPE) |
f8e93a2e | 7009 | { |
fca86134 | 7010 | /* Make sure that the first field will work for a transparent union. |
7011 | If the type isn't complete yet, leave the check to the code in | |
7012 | finish_struct. */ | |
7013 | if (TYPE_SIZE (type)) | |
7014 | { | |
7015 | tree first = first_field (type); | |
7016 | if (first == NULL_TREE | |
7017 | || DECL_ARTIFICIAL (first) | |
7018 | || TYPE_MODE (type) != DECL_MODE (first)) | |
7019 | goto ignored; | |
7020 | } | |
7021 | ||
f8e93a2e | 7022 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
03908818 | 7023 | { |
fca86134 | 7024 | /* If the type isn't complete yet, setting the flag |
7025 | on a variant wouldn't ever be checked. */ | |
7026 | if (!TYPE_SIZE (type)) | |
7027 | goto ignored; | |
7028 | ||
7029 | /* build_duplicate_type doesn't work for C++. */ | |
7030 | if (c_dialect_cxx ()) | |
03908818 | 7031 | goto ignored; |
7032 | ||
7033 | /* A type variant isn't good enough, since we don't a cast | |
7034 | to such a type removed as a no-op. */ | |
7035 | *node = type = build_duplicate_type (type); | |
7036 | } | |
7037 | ||
8df5a43d | 7038 | TYPE_TRANSPARENT_AGGR (type) = 1; |
03908818 | 7039 | return NULL_TREE; |
f8e93a2e | 7040 | } |
7041 | ||
03908818 | 7042 | ignored: |
7043 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 7044 | return NULL_TREE; |
7045 | } | |
7046 | ||
9af7fd5b | 7047 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
7048 | get the requested priority for a constructor or destructor, | |
7049 | possibly issuing diagnostics for invalid or reserved | |
7050 | priorities. */ | |
7051 | ||
7052 | static priority_type | |
7053 | get_priority (tree args, bool is_destructor) | |
7054 | { | |
7055 | HOST_WIDE_INT pri; | |
6c181a06 | 7056 | tree arg; |
9af7fd5b | 7057 | |
7058 | if (!args) | |
7059 | return DEFAULT_INIT_PRIORITY; | |
48e1416a | 7060 | |
28fbc04f | 7061 | if (!SUPPORTS_INIT_PRIORITY) |
7062 | { | |
7063 | if (is_destructor) | |
7064 | error ("destructor priorities are not supported"); | |
7065 | else | |
7066 | error ("constructor priorities are not supported"); | |
7067 | return DEFAULT_INIT_PRIORITY; | |
7068 | } | |
7069 | ||
6c181a06 | 7070 | arg = TREE_VALUE (args); |
253e1cae | 7071 | if (TREE_CODE (arg) == IDENTIFIER_NODE) |
7072 | goto invalid; | |
7073 | if (arg == error_mark_node) | |
7074 | return DEFAULT_INIT_PRIORITY; | |
c28ddc97 | 7075 | arg = default_conversion (arg); |
e913b5cd | 7076 | if (!tree_fits_shwi_p (arg) |
6c181a06 | 7077 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) |
9af7fd5b | 7078 | goto invalid; |
7079 | ||
e913b5cd | 7080 | pri = tree_to_shwi (arg); |
9af7fd5b | 7081 | if (pri < 0 || pri > MAX_INIT_PRIORITY) |
7082 | goto invalid; | |
7083 | ||
7084 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
7085 | { | |
7086 | if (is_destructor) | |
7087 | warning (0, | |
7088 | "destructor priorities from 0 to %d are reserved " | |
48e1416a | 7089 | "for the implementation", |
9af7fd5b | 7090 | MAX_RESERVED_INIT_PRIORITY); |
7091 | else | |
7092 | warning (0, | |
7093 | "constructor priorities from 0 to %d are reserved " | |
48e1416a | 7094 | "for the implementation", |
9af7fd5b | 7095 | MAX_RESERVED_INIT_PRIORITY); |
7096 | } | |
7097 | return pri; | |
7098 | ||
7099 | invalid: | |
7100 | if (is_destructor) | |
7101 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
7102 | MAX_INIT_PRIORITY); | |
7103 | else | |
7104 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
7105 | MAX_INIT_PRIORITY); | |
7106 | return DEFAULT_INIT_PRIORITY; | |
7107 | } | |
7108 | ||
f8e93a2e | 7109 | /* Handle a "constructor" attribute; arguments as in |
7110 | struct attribute_spec.handler. */ | |
7111 | ||
7112 | static tree | |
9af7fd5b | 7113 | handle_constructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 7114 | int ARG_UNUSED (flags), |
09347743 | 7115 | bool *no_add_attrs) |
f8e93a2e | 7116 | { |
7117 | tree decl = *node; | |
7118 | tree type = TREE_TYPE (decl); | |
7119 | ||
7120 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7121 | && TREE_CODE (type) == FUNCTION_TYPE | |
7122 | && decl_function_context (decl) == 0) | |
7123 | { | |
9af7fd5b | 7124 | priority_type priority; |
f8e93a2e | 7125 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
9af7fd5b | 7126 | priority = get_priority (args, /*is_destructor=*/false); |
7127 | SET_DECL_INIT_PRIORITY (decl, priority); | |
f8e93a2e | 7128 | TREE_USED (decl) = 1; |
7129 | } | |
7130 | else | |
7131 | { | |
9b2d6d13 | 7132 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7133 | *no_add_attrs = true; |
7134 | } | |
7135 | ||
7136 | return NULL_TREE; | |
7137 | } | |
7138 | ||
7139 | /* Handle a "destructor" attribute; arguments as in | |
7140 | struct attribute_spec.handler. */ | |
7141 | ||
7142 | static tree | |
9af7fd5b | 7143 | handle_destructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 7144 | int ARG_UNUSED (flags), |
09347743 | 7145 | bool *no_add_attrs) |
f8e93a2e | 7146 | { |
7147 | tree decl = *node; | |
7148 | tree type = TREE_TYPE (decl); | |
7149 | ||
7150 | if (TREE_CODE (decl) == FUNCTION_DECL | |
7151 | && TREE_CODE (type) == FUNCTION_TYPE | |
7152 | && decl_function_context (decl) == 0) | |
7153 | { | |
9af7fd5b | 7154 | priority_type priority; |
f8e93a2e | 7155 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
9af7fd5b | 7156 | priority = get_priority (args, /*is_destructor=*/true); |
7157 | SET_DECL_FINI_PRIORITY (decl, priority); | |
f8e93a2e | 7158 | TREE_USED (decl) = 1; |
7159 | } | |
7160 | else | |
7161 | { | |
9b2d6d13 | 7162 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7163 | *no_add_attrs = true; |
7164 | } | |
7165 | ||
7166 | return NULL_TREE; | |
7167 | } | |
7168 | ||
1c58e3f1 | 7169 | /* Nonzero if the mode is a valid vector mode for this architecture. |
7170 | This returns nonzero even if there is no hardware support for the | |
7171 | vector mode, but we can emulate with narrower modes. */ | |
7172 | ||
7173 | static int | |
7174 | vector_mode_valid_p (enum machine_mode mode) | |
7175 | { | |
7176 | enum mode_class mclass = GET_MODE_CLASS (mode); | |
7177 | enum machine_mode innermode; | |
7178 | ||
7179 | /* Doh! What's going on? */ | |
7180 | if (mclass != MODE_VECTOR_INT | |
7181 | && mclass != MODE_VECTOR_FLOAT | |
7182 | && mclass != MODE_VECTOR_FRACT | |
7183 | && mclass != MODE_VECTOR_UFRACT | |
7184 | && mclass != MODE_VECTOR_ACCUM | |
7185 | && mclass != MODE_VECTOR_UACCUM) | |
7186 | return 0; | |
7187 | ||
7188 | /* Hardware support. Woo hoo! */ | |
7189 | if (targetm.vector_mode_supported_p (mode)) | |
7190 | return 1; | |
7191 | ||
7192 | innermode = GET_MODE_INNER (mode); | |
7193 | ||
7194 | /* We should probably return 1 if requesting V4DI and we have no DI, | |
7195 | but we have V2DI, but this is probably very unlikely. */ | |
7196 | ||
7197 | /* If we have support for the inner mode, we can safely emulate it. | |
7198 | We may not have V2DI, but me can emulate with a pair of DIs. */ | |
7199 | return targetm.scalar_mode_supported_p (innermode); | |
7200 | } | |
7201 | ||
7202 | ||
f8e93a2e | 7203 | /* Handle a "mode" attribute; arguments as in |
7204 | struct attribute_spec.handler. */ | |
7205 | ||
7206 | static tree | |
9a03a746 | 7207 | handle_mode_attribute (tree *node, tree name, tree args, |
7208 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7209 | { |
7210 | tree type = *node; | |
d1dd9ac0 | 7211 | tree ident = TREE_VALUE (args); |
f8e93a2e | 7212 | |
7213 | *no_add_attrs = true; | |
ab2c1de8 | 7214 | |
d1dd9ac0 | 7215 | if (TREE_CODE (ident) != IDENTIFIER_NODE) |
9b2d6d13 | 7216 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7217 | else |
7218 | { | |
7219 | int j; | |
d1dd9ac0 | 7220 | const char *p = IDENTIFIER_POINTER (ident); |
f8e93a2e | 7221 | int len = strlen (p); |
7222 | enum machine_mode mode = VOIDmode; | |
7223 | tree typefm; | |
b2aef146 | 7224 | bool valid_mode; |
f8e93a2e | 7225 | |
7226 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
7227 | && p[len - 1] == '_' && p[len - 2] == '_') | |
7228 | { | |
4fd61bc6 | 7229 | char *newp = (char *) alloca (len - 1); |
f8e93a2e | 7230 | |
7231 | strcpy (newp, &p[2]); | |
7232 | newp[len - 4] = '\0'; | |
7233 | p = newp; | |
7234 | } | |
7235 | ||
7236 | /* Change this type to have a type with the specified mode. | |
7237 | First check for the special modes. */ | |
84166705 | 7238 | if (!strcmp (p, "byte")) |
f8e93a2e | 7239 | mode = byte_mode; |
7240 | else if (!strcmp (p, "word")) | |
7241 | mode = word_mode; | |
84166705 | 7242 | else if (!strcmp (p, "pointer")) |
f8e93a2e | 7243 | mode = ptr_mode; |
0ef89dfd | 7244 | else if (!strcmp (p, "libgcc_cmp_return")) |
7245 | mode = targetm.libgcc_cmp_return_mode (); | |
7246 | else if (!strcmp (p, "libgcc_shift_count")) | |
7247 | mode = targetm.libgcc_shift_count_mode (); | |
1bd43494 | 7248 | else if (!strcmp (p, "unwind_word")) |
7249 | mode = targetm.unwind_word_mode (); | |
f8e93a2e | 7250 | else |
7251 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
7252 | if (!strcmp (p, GET_MODE_NAME (j))) | |
743a6f47 | 7253 | { |
7254 | mode = (enum machine_mode) j; | |
7255 | break; | |
7256 | } | |
f8e93a2e | 7257 | |
7258 | if (mode == VOIDmode) | |
4917c376 | 7259 | { |
d1dd9ac0 | 7260 | error ("unknown machine mode %qE", ident); |
4917c376 | 7261 | return NULL_TREE; |
7262 | } | |
7263 | ||
b2aef146 | 7264 | valid_mode = false; |
7265 | switch (GET_MODE_CLASS (mode)) | |
4917c376 | 7266 | { |
b2aef146 | 7267 | case MODE_INT: |
7268 | case MODE_PARTIAL_INT: | |
7269 | case MODE_FLOAT: | |
c4503c0a | 7270 | case MODE_DECIMAL_FLOAT: |
9421ebb9 | 7271 | case MODE_FRACT: |
7272 | case MODE_UFRACT: | |
7273 | case MODE_ACCUM: | |
7274 | case MODE_UACCUM: | |
b2aef146 | 7275 | valid_mode = targetm.scalar_mode_supported_p (mode); |
7276 | break; | |
7277 | ||
7278 | case MODE_COMPLEX_INT: | |
7279 | case MODE_COMPLEX_FLOAT: | |
7280 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
7281 | break; | |
7282 | ||
7283 | case MODE_VECTOR_INT: | |
7284 | case MODE_VECTOR_FLOAT: | |
9421ebb9 | 7285 | case MODE_VECTOR_FRACT: |
7286 | case MODE_VECTOR_UFRACT: | |
7287 | case MODE_VECTOR_ACCUM: | |
7288 | case MODE_VECTOR_UACCUM: | |
9b2d6d13 | 7289 | warning (OPT_Wattributes, "specifying vector types with " |
7290 | "__attribute__ ((mode)) is deprecated"); | |
7291 | warning (OPT_Wattributes, | |
7292 | "use __attribute__ ((vector_size)) instead"); | |
b2aef146 | 7293 | valid_mode = vector_mode_valid_p (mode); |
7294 | break; | |
4917c376 | 7295 | |
b2aef146 | 7296 | default: |
7297 | break; | |
7298 | } | |
7299 | if (!valid_mode) | |
7300 | { | |
1e5fcbe2 | 7301 | error ("unable to emulate %qs", p); |
b2aef146 | 7302 | return NULL_TREE; |
7303 | } | |
4917c376 | 7304 | |
b2aef146 | 7305 | if (POINTER_TYPE_P (type)) |
ead34f59 | 7306 | { |
6d5d708e | 7307 | addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type)); |
b2aef146 | 7308 | tree (*fn)(tree, enum machine_mode, bool); |
7309 | ||
6d5d708e | 7310 | if (!targetm.addr_space.valid_pointer_mode (mode, as)) |
ead34f59 | 7311 | { |
1e5fcbe2 | 7312 | error ("invalid pointer mode %qs", p); |
ead34f59 | 7313 | return NULL_TREE; |
7314 | } | |
7315 | ||
a0c938f0 | 7316 | if (TREE_CODE (type) == POINTER_TYPE) |
b2aef146 | 7317 | fn = build_pointer_type_for_mode; |
805e22b2 | 7318 | else |
b2aef146 | 7319 | fn = build_reference_type_for_mode; |
7320 | typefm = fn (TREE_TYPE (type), mode, false); | |
ead34f59 | 7321 | } |
b2aef146 | 7322 | else |
9421ebb9 | 7323 | { |
7324 | /* For fixed-point modes, we need to test if the signness of type | |
7325 | and the machine mode are consistent. */ | |
7326 | if (ALL_FIXED_POINT_MODE_P (mode) | |
7327 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
7328 | { | |
bf776685 | 7329 | error ("signedness of type and machine mode %qs don%'t match", p); |
9421ebb9 | 7330 | return NULL_TREE; |
7331 | } | |
7332 | /* For fixed-point modes, we need to pass saturating info. */ | |
7333 | typefm = lang_hooks.types.type_for_mode (mode, | |
7334 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
7335 | : TYPE_UNSIGNED (type)); | |
7336 | } | |
3a648ab9 | 7337 | |
b2aef146 | 7338 | if (typefm == NULL_TREE) |
7339 | { | |
743a6f47 | 7340 | error ("no data type for mode %qs", p); |
b2aef146 | 7341 | return NULL_TREE; |
7342 | } | |
3a648ab9 | 7343 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
7344 | { | |
7345 | /* For enumeral types, copy the precision from the integer | |
7346 | type returned above. If not an INTEGER_TYPE, we can't use | |
7347 | this mode for this type. */ | |
7348 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
7349 | { | |
743a6f47 | 7350 | error ("cannot use mode %qs for enumeral types", p); |
3a648ab9 | 7351 | return NULL_TREE; |
7352 | } | |
7353 | ||
10080eac | 7354 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
7355 | { | |
7356 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
7357 | typefm = type; | |
7358 | } | |
7359 | else | |
7360 | { | |
7361 | /* We cannot build a type variant, as there's code that assumes | |
7362 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
7363 | debug generators. Instead, create a subrange type. This | |
7364 | results in all of the enumeral values being emitted only once | |
7365 | in the original, and the subtype gets them by reference. */ | |
7366 | if (TYPE_UNSIGNED (type)) | |
7367 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
7368 | else | |
7369 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
7370 | TREE_TYPE (typefm) = type; | |
7371 | } | |
3a648ab9 | 7372 | } |
4bf450a1 | 7373 | else if (VECTOR_MODE_P (mode) |
7374 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
7375 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
743a6f47 | 7376 | { |
7377 | error ("mode %qs applied to inappropriate type", p); | |
7378 | return NULL_TREE; | |
7379 | } | |
7380 | ||
b2aef146 | 7381 | *node = typefm; |
f8e93a2e | 7382 | } |
7383 | ||
7384 | return NULL_TREE; | |
7385 | } | |
7386 | ||
7387 | /* Handle a "section" attribute; arguments as in | |
7388 | struct attribute_spec.handler. */ | |
7389 | ||
7390 | static tree | |
9a03a746 | 7391 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
7392 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7393 | { |
7394 | tree decl = *node; | |
7395 | ||
218e3e4e | 7396 | if (targetm_common.have_named_sections) |
f8e93a2e | 7397 | { |
065efcb1 | 7398 | user_defined_section_attribute = true; |
7399 | ||
f8e93a2e | 7400 | if ((TREE_CODE (decl) == FUNCTION_DECL |
7401 | || TREE_CODE (decl) == VAR_DECL) | |
7402 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
7403 | { | |
7404 | if (TREE_CODE (decl) == VAR_DECL | |
7405 | && current_function_decl != NULL_TREE | |
84166705 | 7406 | && !TREE_STATIC (decl)) |
f8e93a2e | 7407 | { |
48e1416a | 7408 | error_at (DECL_SOURCE_LOCATION (decl), |
712d2297 | 7409 | "section attribute cannot be specified for " |
7410 | "local variables"); | |
f8e93a2e | 7411 | *no_add_attrs = true; |
7412 | } | |
7413 | ||
7414 | /* The decl may have already been given a section attribute | |
7415 | from a previous declaration. Ensure they match. */ | |
738a6bda | 7416 | else if (DECL_SECTION_NAME (decl) != NULL |
7417 | && strcmp (DECL_SECTION_NAME (decl), | |
f8e93a2e | 7418 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) |
7419 | { | |
3cf8b391 | 7420 | error ("section of %q+D conflicts with previous declaration", |
7421 | *node); | |
f8e93a2e | 7422 | *no_add_attrs = true; |
7423 | } | |
38475469 | 7424 | else if (TREE_CODE (decl) == VAR_DECL |
7425 | && !targetm.have_tls && targetm.emutls.tmpl_section | |
7426 | && DECL_THREAD_LOCAL_P (decl)) | |
7427 | { | |
7428 | error ("section of %q+D cannot be overridden", *node); | |
7429 | *no_add_attrs = true; | |
7430 | } | |
f8e93a2e | 7431 | else |
738a6bda | 7432 | set_decl_section_name (decl, |
7433 | TREE_STRING_POINTER (TREE_VALUE (args))); | |
f8e93a2e | 7434 | } |
7435 | else | |
7436 | { | |
3cf8b391 | 7437 | error ("section attribute not allowed for %q+D", *node); |
f8e93a2e | 7438 | *no_add_attrs = true; |
7439 | } | |
7440 | } | |
7441 | else | |
7442 | { | |
712d2297 | 7443 | error_at (DECL_SOURCE_LOCATION (*node), |
7444 | "section attributes are not supported for this target"); | |
f8e93a2e | 7445 | *no_add_attrs = true; |
7446 | } | |
7447 | ||
7448 | return NULL_TREE; | |
7449 | } | |
7450 | ||
83e25171 | 7451 | /* Check whether ALIGN is a valid user-specified alignment. If so, |
7452 | return its base-2 log; if not, output an error and return -1. If | |
7453 | ALLOW_ZERO then 0 is valid and should result in a return of -1 with | |
7454 | no error. */ | |
7455 | int | |
7456 | check_user_alignment (const_tree align, bool allow_zero) | |
7457 | { | |
7458 | int i; | |
7459 | ||
3e5a8b00 | 7460 | if (error_operand_p (align)) |
7461 | return -1; | |
5abaa10a | 7462 | if (TREE_CODE (align) != INTEGER_CST |
7463 | || !INTEGRAL_TYPE_P (TREE_TYPE (align))) | |
83e25171 | 7464 | { |
7465 | error ("requested alignment is not an integer constant"); | |
7466 | return -1; | |
7467 | } | |
7468 | else if (allow_zero && integer_zerop (align)) | |
7469 | return -1; | |
1a087624 | 7470 | else if (tree_int_cst_sgn (align) == -1 |
7471 | || (i = tree_log2 (align)) == -1) | |
83e25171 | 7472 | { |
1a087624 | 7473 | error ("requested alignment is not a positive power of 2"); |
83e25171 | 7474 | return -1; |
7475 | } | |
7476 | else if (i >= HOST_BITS_PER_INT - BITS_PER_UNIT_LOG) | |
7477 | { | |
7478 | error ("requested alignment is too large"); | |
7479 | return -1; | |
7480 | } | |
7481 | return i; | |
7482 | } | |
7483 | ||
ffcdbf9c | 7484 | /* |
7485 | If in c++-11, check if the c++-11 alignment constraint with respect | |
7486 | to fundamental alignment (in [dcl.align]) are satisfied. If not in | |
7487 | c++-11 mode, does nothing. | |
7488 | ||
7489 | [dcl.align]2/ says: | |
7490 | ||
7491 | [* if the constant expression evaluates to a fundamental alignment, | |
7492 | the alignment requirement of the declared entity shall be the | |
7493 | specified fundamental alignment. | |
7494 | ||
7495 | * if the constant expression evaluates to an extended alignment | |
7496 | and the implementation supports that alignment in the context | |
7497 | of the declaration, the alignment of the declared entity shall | |
7498 | be that alignment | |
7499 | ||
7500 | * if the constant expression evaluates to an extended alignment | |
7501 | and the implementation does not support that alignment in the | |
7502 | context of the declaration, the program is ill-formed]. */ | |
7503 | ||
7504 | static bool | |
7505 | check_cxx_fundamental_alignment_constraints (tree node, | |
7506 | unsigned align_log, | |
7507 | int flags) | |
7508 | { | |
7509 | bool alignment_too_large_p = false; | |
7510 | unsigned requested_alignment = 1U << align_log; | |
7511 | unsigned max_align = 0; | |
7512 | ||
7513 | if ((!(flags & ATTR_FLAG_CXX11) && !warn_cxx_compat) | |
7514 | || (node == NULL_TREE || node == error_mark_node)) | |
7515 | return true; | |
7516 | ||
7517 | if (cxx_fundamental_alignment_p (requested_alignment)) | |
7518 | return true; | |
7519 | ||
7520 | if (DECL_P (node)) | |
7521 | { | |
7522 | if (TREE_STATIC (node)) | |
7523 | { | |
7524 | /* For file scope variables and static members, the target | |
7525 | supports alignments that are at most | |
7526 | MAX_OFILE_ALIGNMENT. */ | |
7527 | if (requested_alignment > (max_align = MAX_OFILE_ALIGNMENT)) | |
7528 | alignment_too_large_p = true; | |
7529 | } | |
7530 | else | |
7531 | { | |
7532 | #ifdef BIGGEST_FIELD_ALIGNMENT | |
7533 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_FIELD_ALIGNMENT | |
7534 | #else | |
7535 | #define MAX_TARGET_FIELD_ALIGNMENT BIGGEST_ALIGNMENT | |
7536 | #endif | |
7537 | /* For non-static members, the target supports either | |
7538 | alignments that at most either BIGGEST_FIELD_ALIGNMENT | |
7539 | if it is defined or BIGGEST_ALIGNMENT. */ | |
7540 | max_align = MAX_TARGET_FIELD_ALIGNMENT; | |
7541 | if (TREE_CODE (node) == FIELD_DECL | |
7542 | && requested_alignment > (max_align = MAX_TARGET_FIELD_ALIGNMENT)) | |
7543 | alignment_too_large_p = true; | |
7544 | #undef MAX_TARGET_FIELD_ALIGNMENT | |
7545 | /* For stack variables, the target supports at most | |
7546 | MAX_STACK_ALIGNMENT. */ | |
7547 | else if (decl_function_context (node) != NULL | |
7548 | && requested_alignment > (max_align = MAX_STACK_ALIGNMENT)) | |
7549 | alignment_too_large_p = true; | |
7550 | } | |
7551 | } | |
7552 | else if (TYPE_P (node)) | |
7553 | { | |
7554 | /* Let's be liberal for types. */ | |
7555 | if (requested_alignment > (max_align = BIGGEST_ALIGNMENT)) | |
7556 | alignment_too_large_p = true; | |
7557 | } | |
7558 | ||
7559 | if (alignment_too_large_p) | |
7560 | pedwarn (input_location, OPT_Wattributes, | |
7561 | "requested alignment %d is larger than %d", | |
7562 | requested_alignment, max_align); | |
7563 | ||
7564 | return !alignment_too_large_p; | |
7565 | } | |
7566 | ||
f8e93a2e | 7567 | /* Handle a "aligned" attribute; arguments as in |
7568 | struct attribute_spec.handler. */ | |
7569 | ||
7570 | static tree | |
9a03a746 | 7571 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
09347743 | 7572 | int flags, bool *no_add_attrs) |
f8e93a2e | 7573 | { |
7574 | tree decl = NULL_TREE; | |
7575 | tree *type = NULL; | |
7576 | int is_type = 0; | |
caf62483 | 7577 | tree align_expr; |
f8e93a2e | 7578 | int i; |
7579 | ||
caf62483 | 7580 | if (args) |
7581 | { | |
7582 | align_expr = TREE_VALUE (args); | |
3e5a8b00 | 7583 | if (align_expr && TREE_CODE (align_expr) != IDENTIFIER_NODE |
7584 | && TREE_CODE (align_expr) != FUNCTION_DECL) | |
caf62483 | 7585 | align_expr = default_conversion (align_expr); |
7586 | } | |
7587 | else | |
7588 | align_expr = size_int (ATTRIBUTE_ALIGNED_VALUE / BITS_PER_UNIT); | |
7589 | ||
f8e93a2e | 7590 | if (DECL_P (*node)) |
7591 | { | |
7592 | decl = *node; | |
7593 | type = &TREE_TYPE (decl); | |
7594 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
7595 | } | |
7596 | else if (TYPE_P (*node)) | |
7597 | type = node, is_type = 1; | |
7598 | ||
ffcdbf9c | 7599 | if ((i = check_user_alignment (align_expr, false)) == -1 |
7600 | || !check_cxx_fundamental_alignment_constraints (*node, i, flags)) | |
83e25171 | 7601 | *no_add_attrs = true; |
f8e93a2e | 7602 | else if (is_type) |
7603 | { | |
2ec3af9c | 7604 | if ((flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
7605 | /* OK, modify the type in place. */; | |
f8e93a2e | 7606 | /* If we have a TYPE_DECL, then copy the type, so that we |
7607 | don't accidentally modify a builtin type. See pushdecl. */ | |
2ec3af9c | 7608 | else if (decl && TREE_TYPE (decl) != error_mark_node |
7609 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
f8e93a2e | 7610 | { |
7611 | tree tt = TREE_TYPE (decl); | |
e086912e | 7612 | *type = build_variant_type_copy (*type); |
f8e93a2e | 7613 | DECL_ORIGINAL_TYPE (decl) = tt; |
7614 | TYPE_NAME (*type) = decl; | |
7615 | TREE_USED (*type) = TREE_USED (decl); | |
7616 | TREE_TYPE (decl) = *type; | |
7617 | } | |
2ec3af9c | 7618 | else |
e086912e | 7619 | *type = build_variant_type_copy (*type); |
f8e93a2e | 7620 | |
7cfdc2f0 | 7621 | TYPE_ALIGN (*type) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 7622 | TYPE_USER_ALIGN (*type) = 1; |
7623 | } | |
097b5c8b | 7624 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
f8e93a2e | 7625 | && TREE_CODE (decl) != FIELD_DECL) |
7626 | { | |
3cf8b391 | 7627 | error ("alignment may not be specified for %q+D", decl); |
f8e93a2e | 7628 | *no_add_attrs = true; |
7629 | } | |
ffcdbf9c | 7630 | else if (DECL_USER_ALIGN (decl) |
7631 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) | |
7632 | /* C++-11 [dcl.align/4]: | |
7633 | ||
7634 | When multiple alignment-specifiers are specified for an | |
7635 | entity, the alignment requirement shall be set to the | |
7636 | strictest specified alignment. | |
7637 | ||
7638 | This formally comes from the c++11 specification but we are | |
7639 | doing it for the GNU attribute syntax as well. */ | |
7640 | *no_add_attrs = true; | |
097b5c8b | 7641 | else if (TREE_CODE (decl) == FUNCTION_DECL |
7cfdc2f0 | 7642 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
097b5c8b | 7643 | { |
7644 | if (DECL_USER_ALIGN (decl)) | |
7645 | error ("alignment for %q+D was previously specified as %d " | |
7646 | "and may not be decreased", decl, | |
7647 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
7648 | else | |
7649 | error ("alignment for %q+D must be at least %d", decl, | |
7650 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
7651 | *no_add_attrs = true; | |
7652 | } | |
f8e93a2e | 7653 | else |
7654 | { | |
7cfdc2f0 | 7655 | DECL_ALIGN (decl) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 7656 | DECL_USER_ALIGN (decl) = 1; |
7657 | } | |
7658 | ||
7659 | return NULL_TREE; | |
7660 | } | |
7661 | ||
7662 | /* Handle a "weak" attribute; arguments as in | |
7663 | struct attribute_spec.handler. */ | |
7664 | ||
7665 | static tree | |
f948b309 | 7666 | handle_weak_attribute (tree *node, tree name, |
9a03a746 | 7667 | tree ARG_UNUSED (args), |
7668 | int ARG_UNUSED (flags), | |
7669 | bool * ARG_UNUSED (no_add_attrs)) | |
f8e93a2e | 7670 | { |
f948b309 | 7671 | if (TREE_CODE (*node) == FUNCTION_DECL |
059a60f3 | 7672 | && DECL_DECLARED_INLINE_P (*node)) |
7673 | { | |
0725e25c | 7674 | warning (OPT_Wattributes, "inline function %q+D declared weak", *node); |
059a60f3 | 7675 | *no_add_attrs = true; |
7676 | } | |
85c0a25c | 7677 | else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
7678 | { | |
7679 | error ("indirect function %q+D cannot be declared weak", *node); | |
7680 | *no_add_attrs = true; | |
7681 | return NULL_TREE; | |
7682 | } | |
059a60f3 | 7683 | else if (TREE_CODE (*node) == FUNCTION_DECL |
7684 | || TREE_CODE (*node) == VAR_DECL) | |
f948b309 | 7685 | declare_weak (*node); |
7686 | else | |
7687 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 7688 | |
7689 | return NULL_TREE; | |
7690 | } | |
7691 | ||
85c0a25c | 7692 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
7693 | struct attribute_spec.handler, except that IS_ALIAS tells us | |
7694 | whether this is an alias as opposed to ifunc attribute. */ | |
f8e93a2e | 7695 | |
7696 | static tree | |
85c0a25c | 7697 | handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args, |
7698 | bool *no_add_attrs) | |
f8e93a2e | 7699 | { |
7700 | tree decl = *node; | |
7701 | ||
85c0a25c | 7702 | if (TREE_CODE (decl) != FUNCTION_DECL |
7703 | && (!is_alias || TREE_CODE (decl) != VAR_DECL)) | |
9e830260 | 7704 | { |
7705 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7706 | *no_add_attrs = true; | |
7707 | } | |
7708 | else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
48e1416a | 7709 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 7710 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) |
7711 | /* A static variable declaration is always a tentative definition, | |
7712 | but the alias is a non-tentative definition which overrides. */ | |
48e1416a | 7713 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 7714 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) |
f8e93a2e | 7715 | { |
85c0a25c | 7716 | error ("%q+D defined both normally and as %qE attribute", decl, name); |
f8e93a2e | 7717 | *no_add_attrs = true; |
85c0a25c | 7718 | return NULL_TREE; |
f8e93a2e | 7719 | } |
85c0a25c | 7720 | else if (!is_alias |
7721 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) | |
7722 | || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))) | |
7723 | { | |
7724 | error ("weak %q+D cannot be defined %qE", decl, name); | |
7725 | *no_add_attrs = true; | |
7726 | return NULL_TREE; | |
7727 | } | |
8c42f0d9 | 7728 | |
7729 | /* Note that the very first time we process a nested declaration, | |
7730 | decl_function_context will not be set. Indeed, *would* never | |
7731 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
7732 | we do below. After such frobbery, pushdecl would set the context. | |
7733 | In any case, this is never what we want. */ | |
7734 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
f8e93a2e | 7735 | { |
7736 | tree id; | |
7737 | ||
7738 | id = TREE_VALUE (args); | |
7739 | if (TREE_CODE (id) != STRING_CST) | |
7740 | { | |
85c0a25c | 7741 | error ("attribute %qE argument not a string", name); |
f8e93a2e | 7742 | *no_add_attrs = true; |
7743 | return NULL_TREE; | |
7744 | } | |
7745 | id = get_identifier (TREE_STRING_POINTER (id)); | |
7746 | /* This counts as a use of the object pointed to. */ | |
7747 | TREE_USED (id) = 1; | |
7748 | ||
7749 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
7750 | DECL_INITIAL (decl) = error_mark_node; | |
7751 | else | |
f2526cce | 7752 | TREE_STATIC (decl) = 1; |
85c0a25c | 7753 | |
7754 | if (!is_alias) | |
7755 | /* ifuncs are also aliases, so set that attribute too. */ | |
7756 | DECL_ATTRIBUTES (decl) | |
7757 | = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl)); | |
f8e93a2e | 7758 | } |
7759 | else | |
7760 | { | |
9b2d6d13 | 7761 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7762 | *no_add_attrs = true; |
7763 | } | |
7764 | ||
7765 | return NULL_TREE; | |
7766 | } | |
7767 | ||
85c0a25c | 7768 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
7769 | struct attribute_spec.handler. */ | |
7770 | ||
7771 | static tree | |
7772 | handle_ifunc_attribute (tree *node, tree name, tree args, | |
7773 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7774 | { | |
7775 | return handle_alias_ifunc_attribute (false, node, name, args, no_add_attrs); | |
7776 | } | |
7777 | ||
7778 | /* Handle an "alias" or "ifunc" attribute; arguments as in | |
7779 | struct attribute_spec.handler. */ | |
7780 | ||
7781 | static tree | |
7782 | handle_alias_attribute (tree *node, tree name, tree args, | |
7783 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7784 | { | |
7785 | return handle_alias_ifunc_attribute (true, node, name, args, no_add_attrs); | |
7786 | } | |
7787 | ||
f4a30bd7 | 7788 | /* Handle a "weakref" attribute; arguments as in struct |
7789 | attribute_spec.handler. */ | |
7790 | ||
7791 | static tree | |
7792 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
7793 | int flags, bool *no_add_attrs) | |
7794 | { | |
7795 | tree attr = NULL_TREE; | |
7796 | ||
83852912 | 7797 | /* We must ignore the attribute when it is associated with |
7798 | local-scoped decls, since attribute alias is ignored and many | |
7799 | such symbols do not even have a DECL_WEAK field. */ | |
64a7bd81 | 7800 | if (decl_function_context (*node) |
7801 | || current_function_decl | |
7802 | || (TREE_CODE (*node) != VAR_DECL && TREE_CODE (*node) != FUNCTION_DECL)) | |
83852912 | 7803 | { |
7804 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7805 | *no_add_attrs = true; | |
7806 | return NULL_TREE; | |
7807 | } | |
7808 | ||
85c0a25c | 7809 | if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
7810 | { | |
7811 | error ("indirect function %q+D cannot be declared weakref", *node); | |
7812 | *no_add_attrs = true; | |
7813 | return NULL_TREE; | |
7814 | } | |
7815 | ||
f4a30bd7 | 7816 | /* The idea here is that `weakref("name")' mutates into `weakref, |
7817 | alias("name")', and weakref without arguments, in turn, | |
7818 | implicitly adds weak. */ | |
7819 | ||
7820 | if (args) | |
7821 | { | |
7822 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
7823 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
7824 | ||
7825 | *no_add_attrs = true; | |
0a3ecdc1 | 7826 | |
7827 | decl_attributes (node, attr, flags); | |
f4a30bd7 | 7828 | } |
7829 | else | |
7830 | { | |
7831 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
712d2297 | 7832 | error_at (DECL_SOURCE_LOCATION (*node), |
7833 | "weakref attribute must appear before alias attribute"); | |
f4a30bd7 | 7834 | |
0a3ecdc1 | 7835 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
7836 | and that isn't supported; and because it wants to add it to | |
7837 | the list of weak decls, which isn't helpful. */ | |
7838 | DECL_WEAK (*node) = 1; | |
f4a30bd7 | 7839 | } |
7840 | ||
f4a30bd7 | 7841 | return NULL_TREE; |
7842 | } | |
7843 | ||
f8e93a2e | 7844 | /* Handle an "visibility" attribute; arguments as in |
7845 | struct attribute_spec.handler. */ | |
7846 | ||
7847 | static tree | |
1cae46be | 7848 | handle_visibility_attribute (tree *node, tree name, tree args, |
9a03a746 | 7849 | int ARG_UNUSED (flags), |
4a2849cb | 7850 | bool *ARG_UNUSED (no_add_attrs)) |
f8e93a2e | 7851 | { |
7852 | tree decl = *node; | |
9c40570a | 7853 | tree id = TREE_VALUE (args); |
4a2849cb | 7854 | enum symbol_visibility vis; |
f8e93a2e | 7855 | |
b212f378 | 7856 | if (TYPE_P (*node)) |
7857 | { | |
4a2849cb | 7858 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
7859 | /* OK */; | |
7860 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
7861 | { | |
7862 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
7863 | name); | |
7864 | return NULL_TREE; | |
7865 | } | |
7866 | else if (TYPE_FIELDS (*node)) | |
7867 | { | |
7868 | error ("%qE attribute ignored because %qT is already defined", | |
7869 | name, *node); | |
7870 | return NULL_TREE; | |
7871 | } | |
b212f378 | 7872 | } |
84166705 | 7873 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
f8e93a2e | 7874 | { |
9b2d6d13 | 7875 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
9c40570a | 7876 | return NULL_TREE; |
f8e93a2e | 7877 | } |
f8e93a2e | 7878 | |
9c40570a | 7879 | if (TREE_CODE (id) != STRING_CST) |
7880 | { | |
07e3a3d2 | 7881 | error ("visibility argument not a string"); |
9c40570a | 7882 | return NULL_TREE; |
f8e93a2e | 7883 | } |
b27ac6b5 | 7884 | |
b212f378 | 7885 | /* If this is a type, set the visibility on the type decl. */ |
7886 | if (TYPE_P (decl)) | |
7887 | { | |
7888 | decl = TYPE_NAME (decl); | |
84166705 | 7889 | if (!decl) |
a0c938f0 | 7890 | return NULL_TREE; |
e147aab3 | 7891 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
7892 | { | |
9b2d6d13 | 7893 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e147aab3 | 7894 | name); |
7895 | return NULL_TREE; | |
7896 | } | |
b212f378 | 7897 | } |
f8e93a2e | 7898 | |
9c40570a | 7899 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
4a2849cb | 7900 | vis = VISIBILITY_DEFAULT; |
9c40570a | 7901 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
4a2849cb | 7902 | vis = VISIBILITY_INTERNAL; |
9c40570a | 7903 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
4a2849cb | 7904 | vis = VISIBILITY_HIDDEN; |
9c40570a | 7905 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
4a2849cb | 7906 | vis = VISIBILITY_PROTECTED; |
9c40570a | 7907 | else |
4a2849cb | 7908 | { |
7909 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
7910 | vis = VISIBILITY_DEFAULT; | |
7911 | } | |
7912 | ||
7913 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
098a01e7 | 7914 | && vis != DECL_VISIBILITY (decl)) |
7915 | { | |
7916 | tree attributes = (TYPE_P (*node) | |
7917 | ? TYPE_ATTRIBUTES (*node) | |
7918 | : DECL_ATTRIBUTES (decl)); | |
7919 | if (lookup_attribute ("visibility", attributes)) | |
7920 | error ("%qD redeclared with different visibility", decl); | |
7921 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
7922 | && lookup_attribute ("dllimport", attributes)) | |
7923 | error ("%qD was declared %qs which implies default visibility", | |
7924 | decl, "dllimport"); | |
7925 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
7926 | && lookup_attribute ("dllexport", attributes)) | |
7927 | error ("%qD was declared %qs which implies default visibility", | |
7928 | decl, "dllexport"); | |
7929 | } | |
4a2849cb | 7930 | |
7931 | DECL_VISIBILITY (decl) = vis; | |
b212f378 | 7932 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
7933 | ||
4a2849cb | 7934 | /* Go ahead and attach the attribute to the node as well. This is needed |
7935 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
7936 | visibility was not specified, or because it was explicitly overridden | |
7937 | from the containing scope. */ | |
9c40570a | 7938 | |
f8e93a2e | 7939 | return NULL_TREE; |
7940 | } | |
7941 | ||
3aa0c315 | 7942 | /* Determine the ELF symbol visibility for DECL, which is either a |
7943 | variable or a function. It is an error to use this function if a | |
7944 | definition of DECL is not available in this translation unit. | |
7945 | Returns true if the final visibility has been determined by this | |
7946 | function; false if the caller is free to make additional | |
7947 | modifications. */ | |
7948 | ||
7949 | bool | |
7950 | c_determine_visibility (tree decl) | |
7951 | { | |
1d8fc210 | 7952 | gcc_assert (TREE_CODE (decl) == VAR_DECL |
7953 | || TREE_CODE (decl) == FUNCTION_DECL); | |
3aa0c315 | 7954 | |
7955 | /* If the user explicitly specified the visibility with an | |
7956 | attribute, honor that. DECL_VISIBILITY will have been set during | |
920f5a70 | 7957 | the processing of the attribute. We check for an explicit |
7958 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
7959 | to distinguish the use of an attribute from the use of a "#pragma | |
7960 | GCC visibility push(...)"; in the latter case we still want other | |
7961 | considerations to be able to overrule the #pragma. */ | |
7962 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) | |
7963 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
7964 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
7965 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
3aa0c315 | 7966 | return true; |
7967 | ||
4a2849cb | 7968 | /* Set default visibility to whatever the user supplied with |
7969 | visibility_specified depending on #pragma GCC visibility. */ | |
7970 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
7971 | { | |
2d9d8740 | 7972 | if (visibility_options.inpragma |
7973 | || DECL_VISIBILITY (decl) != default_visibility) | |
7974 | { | |
7975 | DECL_VISIBILITY (decl) = default_visibility; | |
7976 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
7977 | /* If visibility changed and DECL already has DECL_RTL, ensure | |
7978 | symbol flags are updated. */ | |
7979 | if (((TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) | |
7980 | || TREE_CODE (decl) == FUNCTION_DECL) | |
7981 | && DECL_RTL_SET_P (decl)) | |
7982 | make_decl_rtl (decl); | |
7983 | } | |
4a2849cb | 7984 | } |
3aa0c315 | 7985 | return false; |
7986 | } | |
7987 | ||
24dfead4 | 7988 | /* Handle an "tls_model" attribute; arguments as in |
7989 | struct attribute_spec.handler. */ | |
7990 | ||
7991 | static tree | |
1cae46be | 7992 | handle_tls_model_attribute (tree *node, tree name, tree args, |
9a03a746 | 7993 | int ARG_UNUSED (flags), bool *no_add_attrs) |
24dfead4 | 7994 | { |
1b53eb20 | 7995 | tree id; |
24dfead4 | 7996 | tree decl = *node; |
1b53eb20 | 7997 | enum tls_model kind; |
24dfead4 | 7998 | |
1b53eb20 | 7999 | *no_add_attrs = true; |
8000 | ||
c34f8a78 | 8001 | if (TREE_CODE (decl) != VAR_DECL || !DECL_THREAD_LOCAL_P (decl)) |
24dfead4 | 8002 | { |
9b2d6d13 | 8003 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
1b53eb20 | 8004 | return NULL_TREE; |
24dfead4 | 8005 | } |
24dfead4 | 8006 | |
1b53eb20 | 8007 | kind = DECL_TLS_MODEL (decl); |
8008 | id = TREE_VALUE (args); | |
8009 | if (TREE_CODE (id) != STRING_CST) | |
8010 | { | |
8011 | error ("tls_model argument not a string"); | |
8012 | return NULL_TREE; | |
24dfead4 | 8013 | } |
8014 | ||
1b53eb20 | 8015 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
8016 | kind = TLS_MODEL_LOCAL_EXEC; | |
8017 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
8018 | kind = TLS_MODEL_INITIAL_EXEC; | |
8019 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
8020 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
8021 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
8022 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
8023 | else | |
8024 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
8025 | ||
5e68df57 | 8026 | set_decl_tls_model (decl, kind); |
24dfead4 | 8027 | return NULL_TREE; |
8028 | } | |
8029 | ||
f8e93a2e | 8030 | /* Handle a "no_instrument_function" attribute; arguments as in |
8031 | struct attribute_spec.handler. */ | |
8032 | ||
8033 | static tree | |
1cae46be | 8034 | handle_no_instrument_function_attribute (tree *node, tree name, |
9a03a746 | 8035 | tree ARG_UNUSED (args), |
8036 | int ARG_UNUSED (flags), | |
09347743 | 8037 | bool *no_add_attrs) |
f8e93a2e | 8038 | { |
8039 | tree decl = *node; | |
8040 | ||
8041 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8042 | { | |
712d2297 | 8043 | error_at (DECL_SOURCE_LOCATION (decl), |
8044 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 8045 | *no_add_attrs = true; |
8046 | } | |
f8e93a2e | 8047 | else |
8048 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
8049 | ||
8050 | return NULL_TREE; | |
8051 | } | |
8052 | ||
8053 | /* Handle a "malloc" attribute; arguments as in | |
8054 | struct attribute_spec.handler. */ | |
8055 | ||
8056 | static tree | |
9a03a746 | 8057 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8058 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 8059 | { |
a5147fca | 8060 | if (TREE_CODE (*node) == FUNCTION_DECL |
8061 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
f8e93a2e | 8062 | DECL_IS_MALLOC (*node) = 1; |
f8e93a2e | 8063 | else |
8064 | { | |
9b2d6d13 | 8065 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8066 | *no_add_attrs = true; |
8067 | } | |
8068 | ||
8069 | return NULL_TREE; | |
8070 | } | |
8071 | ||
4a29c97c | 8072 | /* Handle a "alloc_size" attribute; arguments as in |
8073 | struct attribute_spec.handler. */ | |
8074 | ||
8075 | static tree | |
8076 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
8077 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8078 | { | |
2802826e | 8079 | unsigned arg_count = type_num_arguments (*node); |
4a29c97c | 8080 | for (; args; args = TREE_CHAIN (args)) |
8081 | { | |
8082 | tree position = TREE_VALUE (args); | |
caf62483 | 8083 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
8084 | && TREE_CODE (position) != FUNCTION_DECL) | |
8085 | position = default_conversion (position); | |
4a29c97c | 8086 | |
237e78b1 | 8087 | if (!tree_fits_uhwi_p (position) |
8088 | || !arg_count | |
8089 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
4a29c97c | 8090 | { |
48e1416a | 8091 | warning (OPT_Wattributes, |
4a29c97c | 8092 | "alloc_size parameter outside range"); |
8093 | *no_add_attrs = true; | |
8094 | return NULL_TREE; | |
8095 | } | |
8096 | } | |
8097 | return NULL_TREE; | |
8098 | } | |
8099 | ||
237e78b1 | 8100 | /* Handle a "alloc_align" attribute; arguments as in |
8101 | struct attribute_spec.handler. */ | |
8102 | ||
8103 | static tree | |
8104 | handle_alloc_align_attribute (tree *node, tree, tree args, int, | |
8105 | bool *no_add_attrs) | |
8106 | { | |
8107 | unsigned arg_count = type_num_arguments (*node); | |
8108 | tree position = TREE_VALUE (args); | |
8109 | if (position && TREE_CODE (position) != IDENTIFIER_NODE) | |
8110 | position = default_conversion (position); | |
8111 | ||
8112 | if (!tree_fits_uhwi_p (position) | |
8113 | || !arg_count | |
8114 | || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) | |
8115 | { | |
8116 | warning (OPT_Wattributes, | |
8117 | "alloc_align parameter outside range"); | |
8118 | *no_add_attrs = true; | |
8119 | return NULL_TREE; | |
8120 | } | |
8121 | return NULL_TREE; | |
8122 | } | |
8123 | ||
8124 | /* Handle a "assume_aligned" attribute; arguments as in | |
8125 | struct attribute_spec.handler. */ | |
8126 | ||
8127 | static tree | |
8128 | handle_assume_aligned_attribute (tree *, tree, tree args, int, | |
8129 | bool *no_add_attrs) | |
8130 | { | |
8131 | for (; args; args = TREE_CHAIN (args)) | |
8132 | { | |
8133 | tree position = TREE_VALUE (args); | |
8134 | if (position && TREE_CODE (position) != IDENTIFIER_NODE | |
8135 | && TREE_CODE (position) != FUNCTION_DECL) | |
8136 | position = default_conversion (position); | |
8137 | ||
8138 | if (TREE_CODE (position) != INTEGER_CST) | |
8139 | { | |
8140 | warning (OPT_Wattributes, | |
8141 | "assume_aligned parameter not integer constant"); | |
8142 | *no_add_attrs = true; | |
8143 | return NULL_TREE; | |
8144 | } | |
8145 | } | |
8146 | return NULL_TREE; | |
8147 | } | |
8148 | ||
8ce86007 | 8149 | /* Handle a "fn spec" attribute; arguments as in |
8150 | struct attribute_spec.handler. */ | |
8151 | ||
8152 | static tree | |
8153 | handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), | |
8154 | tree args, int ARG_UNUSED (flags), | |
8155 | bool *no_add_attrs ATTRIBUTE_UNUSED) | |
8156 | { | |
8157 | gcc_assert (args | |
8158 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST | |
8159 | && !TREE_CHAIN (args)); | |
8160 | return NULL_TREE; | |
8161 | } | |
8162 | ||
a96c3cc1 | 8163 | /* Handle a "warn_unused" attribute; arguments as in |
8164 | struct attribute_spec.handler. */ | |
8165 | ||
8166 | static tree | |
8167 | handle_warn_unused_attribute (tree *node, tree name, | |
8168 | tree args ATTRIBUTE_UNUSED, | |
8169 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
8170 | { | |
8171 | if (TYPE_P (*node)) | |
8172 | /* Do nothing else, just set the attribute. We'll get at | |
8173 | it later with lookup_attribute. */ | |
8174 | ; | |
8175 | else | |
8176 | { | |
8177 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8178 | *no_add_attrs = true; | |
8179 | } | |
8180 | ||
8181 | return NULL_TREE; | |
8182 | } | |
8183 | ||
bc7bff74 | 8184 | /* Handle an "omp declare simd" attribute; arguments as in |
8185 | struct attribute_spec.handler. */ | |
8186 | ||
8187 | static tree | |
8188 | handle_omp_declare_simd_attribute (tree *, tree, tree, int, bool *) | |
8189 | { | |
8190 | return NULL_TREE; | |
8191 | } | |
8192 | ||
8193 | /* Handle an "omp declare target" attribute; arguments as in | |
8194 | struct attribute_spec.handler. */ | |
8195 | ||
8196 | static tree | |
8197 | handle_omp_declare_target_attribute (tree *, tree, tree, int, bool *) | |
8198 | { | |
8199 | return NULL_TREE; | |
8200 | } | |
8201 | ||
26d1c5ff | 8202 | /* Handle a "returns_twice" attribute; arguments as in |
8203 | struct attribute_spec.handler. */ | |
8204 | ||
8205 | static tree | |
8206 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
8207 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8208 | { | |
8209 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
8210 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
8211 | else | |
8212 | { | |
9b2d6d13 | 8213 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
26d1c5ff | 8214 | *no_add_attrs = true; |
8215 | } | |
8216 | ||
8217 | return NULL_TREE; | |
8218 | } | |
8219 | ||
f8e93a2e | 8220 | /* Handle a "no_limit_stack" attribute; arguments as in |
8221 | struct attribute_spec.handler. */ | |
8222 | ||
8223 | static tree | |
1cae46be | 8224 | handle_no_limit_stack_attribute (tree *node, tree name, |
9a03a746 | 8225 | tree ARG_UNUSED (args), |
8226 | int ARG_UNUSED (flags), | |
09347743 | 8227 | bool *no_add_attrs) |
f8e93a2e | 8228 | { |
8229 | tree decl = *node; | |
8230 | ||
8231 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8232 | { | |
712d2297 | 8233 | error_at (DECL_SOURCE_LOCATION (decl), |
8234 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 8235 | *no_add_attrs = true; |
8236 | } | |
8237 | else if (DECL_INITIAL (decl)) | |
8238 | { | |
712d2297 | 8239 | error_at (DECL_SOURCE_LOCATION (decl), |
8240 | "can%'t set %qE attribute after definition", name); | |
f8e93a2e | 8241 | *no_add_attrs = true; |
8242 | } | |
8243 | else | |
8244 | DECL_NO_LIMIT_STACK (decl) = 1; | |
8245 | ||
8246 | return NULL_TREE; | |
8247 | } | |
8248 | ||
8249 | /* Handle a "pure" attribute; arguments as in | |
8250 | struct attribute_spec.handler. */ | |
8251 | ||
8252 | static tree | |
9a03a746 | 8253 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8254 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 8255 | { |
8256 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
9c2a0c05 | 8257 | DECL_PURE_P (*node) = 1; |
f8e93a2e | 8258 | /* ??? TODO: Support types. */ |
8259 | else | |
8260 | { | |
9b2d6d13 | 8261 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8262 | *no_add_attrs = true; |
8263 | } | |
8264 | ||
8265 | return NULL_TREE; | |
8266 | } | |
8267 | ||
4c0315d0 | 8268 | /* Digest an attribute list destined for a transactional memory statement. |
8269 | ALLOWED is the set of attributes that are allowed for this statement; | |
8270 | return the attribute we parsed. Multiple attributes are never allowed. */ | |
8271 | ||
8272 | int | |
8273 | parse_tm_stmt_attr (tree attrs, int allowed) | |
8274 | { | |
8275 | tree a_seen = NULL; | |
8276 | int m_seen = 0; | |
8277 | ||
8278 | for ( ; attrs ; attrs = TREE_CHAIN (attrs)) | |
8279 | { | |
8280 | tree a = TREE_PURPOSE (attrs); | |
8281 | int m = 0; | |
8282 | ||
8283 | if (is_attribute_p ("outer", a)) | |
8284 | m = TM_STMT_ATTR_OUTER; | |
8285 | ||
8286 | if ((m & allowed) == 0) | |
8287 | { | |
8288 | warning (OPT_Wattributes, "%qE attribute directive ignored", a); | |
8289 | continue; | |
8290 | } | |
8291 | ||
8292 | if (m_seen == 0) | |
8293 | { | |
8294 | a_seen = a; | |
8295 | m_seen = m; | |
8296 | } | |
8297 | else if (m_seen == m) | |
8298 | warning (OPT_Wattributes, "%qE attribute duplicated", a); | |
8299 | else | |
8300 | warning (OPT_Wattributes, "%qE attribute follows %qE", a, a_seen); | |
8301 | } | |
8302 | ||
8303 | return m_seen; | |
8304 | } | |
8305 | ||
8306 | /* Transform a TM attribute name into a maskable integer and back. | |
8307 | Note that NULL (i.e. no attribute) is mapped to UNKNOWN, corresponding | |
8308 | to how the lack of an attribute is treated. */ | |
8309 | ||
8310 | int | |
8311 | tm_attr_to_mask (tree attr) | |
8312 | { | |
8313 | if (attr == NULL) | |
8314 | return 0; | |
8315 | if (is_attribute_p ("transaction_safe", attr)) | |
8316 | return TM_ATTR_SAFE; | |
8317 | if (is_attribute_p ("transaction_callable", attr)) | |
8318 | return TM_ATTR_CALLABLE; | |
8319 | if (is_attribute_p ("transaction_pure", attr)) | |
8320 | return TM_ATTR_PURE; | |
8321 | if (is_attribute_p ("transaction_unsafe", attr)) | |
8322 | return TM_ATTR_IRREVOCABLE; | |
8323 | if (is_attribute_p ("transaction_may_cancel_outer", attr)) | |
8324 | return TM_ATTR_MAY_CANCEL_OUTER; | |
8325 | return 0; | |
8326 | } | |
8327 | ||
8328 | tree | |
8329 | tm_mask_to_attr (int mask) | |
8330 | { | |
8331 | const char *str; | |
8332 | switch (mask) | |
8333 | { | |
8334 | case TM_ATTR_SAFE: | |
8335 | str = "transaction_safe"; | |
8336 | break; | |
8337 | case TM_ATTR_CALLABLE: | |
8338 | str = "transaction_callable"; | |
8339 | break; | |
8340 | case TM_ATTR_PURE: | |
8341 | str = "transaction_pure"; | |
8342 | break; | |
8343 | case TM_ATTR_IRREVOCABLE: | |
8344 | str = "transaction_unsafe"; | |
8345 | break; | |
8346 | case TM_ATTR_MAY_CANCEL_OUTER: | |
8347 | str = "transaction_may_cancel_outer"; | |
8348 | break; | |
8349 | default: | |
8350 | gcc_unreachable (); | |
8351 | } | |
8352 | return get_identifier (str); | |
8353 | } | |
8354 | ||
8355 | /* Return the first TM attribute seen in LIST. */ | |
8356 | ||
8357 | tree | |
8358 | find_tm_attribute (tree list) | |
8359 | { | |
8360 | for (; list ; list = TREE_CHAIN (list)) | |
8361 | { | |
8362 | tree name = TREE_PURPOSE (list); | |
8363 | if (tm_attr_to_mask (name) != 0) | |
8364 | return name; | |
8365 | } | |
8366 | return NULL_TREE; | |
8367 | } | |
8368 | ||
8369 | /* Handle the TM attributes; arguments as in struct attribute_spec.handler. | |
8370 | Here we accept only function types, and verify that none of the other | |
8371 | function TM attributes are also applied. */ | |
8372 | /* ??? We need to accept class types for C++, but not C. This greatly | |
8373 | complicates this function, since we can no longer rely on the extra | |
8374 | processing given by function_type_required. */ | |
8375 | ||
8376 | static tree | |
8377 | handle_tm_attribute (tree *node, tree name, tree args, | |
8378 | int flags, bool *no_add_attrs) | |
8379 | { | |
8380 | /* Only one path adds the attribute; others don't. */ | |
8381 | *no_add_attrs = true; | |
8382 | ||
8383 | switch (TREE_CODE (*node)) | |
8384 | { | |
8385 | case RECORD_TYPE: | |
8386 | case UNION_TYPE: | |
8387 | /* Only tm_callable and tm_safe apply to classes. */ | |
8388 | if (tm_attr_to_mask (name) & ~(TM_ATTR_SAFE | TM_ATTR_CALLABLE)) | |
8389 | goto ignored; | |
8390 | /* FALLTHRU */ | |
8391 | ||
8392 | case FUNCTION_TYPE: | |
8393 | case METHOD_TYPE: | |
8394 | { | |
8395 | tree old_name = find_tm_attribute (TYPE_ATTRIBUTES (*node)); | |
8396 | if (old_name == name) | |
8397 | ; | |
8398 | else if (old_name != NULL_TREE) | |
8399 | error ("type was previously declared %qE", old_name); | |
8400 | else | |
8401 | *no_add_attrs = false; | |
8402 | } | |
8403 | break; | |
8404 | ||
8405 | case POINTER_TYPE: | |
8406 | { | |
8407 | enum tree_code subcode = TREE_CODE (TREE_TYPE (*node)); | |
8408 | if (subcode == FUNCTION_TYPE || subcode == METHOD_TYPE) | |
8409 | { | |
8410 | tree fn_tmp = TREE_TYPE (*node); | |
8411 | decl_attributes (&fn_tmp, tree_cons (name, args, NULL), 0); | |
8412 | *node = build_pointer_type (fn_tmp); | |
8413 | break; | |
8414 | } | |
8415 | } | |
8416 | /* FALLTHRU */ | |
8417 | ||
8418 | default: | |
8419 | /* If a function is next, pass it on to be tried next. */ | |
8420 | if (flags & (int) ATTR_FLAG_FUNCTION_NEXT) | |
8421 | return tree_cons (name, args, NULL); | |
8422 | ||
8423 | ignored: | |
8424 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8425 | break; | |
8426 | } | |
8427 | ||
8428 | return NULL_TREE; | |
8429 | } | |
8430 | ||
8431 | /* Handle the TM_WRAP attribute; arguments as in | |
8432 | struct attribute_spec.handler. */ | |
8433 | ||
8434 | static tree | |
8435 | handle_tm_wrap_attribute (tree *node, tree name, tree args, | |
8436 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8437 | { | |
8438 | tree decl = *node; | |
8439 | ||
8440 | /* We don't need the attribute even on success, since we | |
8441 | record the entry in an external table. */ | |
8442 | *no_add_attrs = true; | |
8443 | ||
8444 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
8445 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
8446 | else | |
8447 | { | |
8448 | tree wrap_decl = TREE_VALUE (args); | |
3e5a8b00 | 8449 | if (error_operand_p (wrap_decl)) |
8450 | ; | |
8451 | else if (TREE_CODE (wrap_decl) != IDENTIFIER_NODE | |
8452 | && TREE_CODE (wrap_decl) != VAR_DECL | |
8453 | && TREE_CODE (wrap_decl) != FUNCTION_DECL) | |
4c0315d0 | 8454 | error ("%qE argument not an identifier", name); |
8455 | else | |
8456 | { | |
8457 | if (TREE_CODE (wrap_decl) == IDENTIFIER_NODE) | |
8458 | wrap_decl = lookup_name (wrap_decl); | |
8459 | if (wrap_decl && TREE_CODE (wrap_decl) == FUNCTION_DECL) | |
8460 | { | |
8461 | if (lang_hooks.types_compatible_p (TREE_TYPE (decl), | |
8462 | TREE_TYPE (wrap_decl))) | |
8463 | record_tm_replacement (wrap_decl, decl); | |
8464 | else | |
8465 | error ("%qD is not compatible with %qD", wrap_decl, decl); | |
8466 | } | |
8467 | else | |
cdf34fca | 8468 | error ("%qE argument is not a function", name); |
4c0315d0 | 8469 | } |
8470 | } | |
8471 | ||
8472 | return NULL_TREE; | |
8473 | } | |
8474 | ||
8475 | /* Ignore the given attribute. Used when this attribute may be usefully | |
8476 | overridden by the target, but is not used generically. */ | |
8477 | ||
8478 | static tree | |
8479 | ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name), | |
8480 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
8481 | bool *no_add_attrs) | |
8482 | { | |
8483 | *no_add_attrs = true; | |
8484 | return NULL_TREE; | |
8485 | } | |
8486 | ||
fc09b200 | 8487 | /* Handle a "no vops" attribute; arguments as in |
8488 | struct attribute_spec.handler. */ | |
8489 | ||
8490 | static tree | |
8491 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
8492 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
8493 | bool *ARG_UNUSED (no_add_attrs)) | |
8494 | { | |
8495 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
8496 | DECL_IS_NOVOPS (*node) = 1; | |
8497 | return NULL_TREE; | |
8498 | } | |
8499 | ||
f8e93a2e | 8500 | /* Handle a "deprecated" attribute; arguments as in |
8501 | struct attribute_spec.handler. */ | |
1cae46be | 8502 | |
f8e93a2e | 8503 | static tree |
1cae46be | 8504 | handle_deprecated_attribute (tree *node, tree name, |
45c4e798 | 8505 | tree args, int flags, |
09347743 | 8506 | bool *no_add_attrs) |
f8e93a2e | 8507 | { |
8508 | tree type = NULL_TREE; | |
8509 | int warn = 0; | |
782858b8 | 8510 | tree what = NULL_TREE; |
1cae46be | 8511 | |
45c4e798 | 8512 | if (!args) |
8513 | *no_add_attrs = true; | |
8514 | else if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
8515 | { | |
8516 | error ("deprecated message is not a string"); | |
8517 | *no_add_attrs = true; | |
8518 | } | |
8519 | ||
f8e93a2e | 8520 | if (DECL_P (*node)) |
8521 | { | |
8522 | tree decl = *node; | |
8523 | type = TREE_TYPE (decl); | |
1cae46be | 8524 | |
f8e93a2e | 8525 | if (TREE_CODE (decl) == TYPE_DECL |
8526 | || TREE_CODE (decl) == PARM_DECL | |
8527 | || TREE_CODE (decl) == VAR_DECL | |
8528 | || TREE_CODE (decl) == FUNCTION_DECL | |
40c8d1dd | 8529 | || TREE_CODE (decl) == FIELD_DECL |
8530 | || objc_method_decl (TREE_CODE (decl))) | |
f8e93a2e | 8531 | TREE_DEPRECATED (decl) = 1; |
8532 | else | |
8533 | warn = 1; | |
8534 | } | |
8535 | else if (TYPE_P (*node)) | |
8536 | { | |
8537 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 8538 | *node = build_variant_type_copy (*node); |
f8e93a2e | 8539 | TREE_DEPRECATED (*node) = 1; |
8540 | type = *node; | |
8541 | } | |
8542 | else | |
8543 | warn = 1; | |
1cae46be | 8544 | |
f8e93a2e | 8545 | if (warn) |
8546 | { | |
8547 | *no_add_attrs = true; | |
8548 | if (type && TYPE_NAME (type)) | |
8549 | { | |
8550 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
782858b8 | 8551 | what = TYPE_NAME (*node); |
f8e93a2e | 8552 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
8553 | && DECL_NAME (TYPE_NAME (type))) | |
782858b8 | 8554 | what = DECL_NAME (TYPE_NAME (type)); |
f8e93a2e | 8555 | } |
8556 | if (what) | |
9b2d6d13 | 8557 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
f8e93a2e | 8558 | else |
9b2d6d13 | 8559 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8560 | } |
8561 | ||
8562 | return NULL_TREE; | |
8563 | } | |
8564 | ||
f8e93a2e | 8565 | /* Handle a "vector_size" attribute; arguments as in |
8566 | struct attribute_spec.handler. */ | |
8567 | ||
8568 | static tree | |
1cae46be | 8569 | handle_vector_size_attribute (tree *node, tree name, tree args, |
9a03a746 | 8570 | int ARG_UNUSED (flags), |
09347743 | 8571 | bool *no_add_attrs) |
f8e93a2e | 8572 | { |
8573 | unsigned HOST_WIDE_INT vecsize, nunits; | |
83e2a11b | 8574 | enum machine_mode orig_mode; |
4917c376 | 8575 | tree type = *node, new_type, size; |
f8e93a2e | 8576 | |
8577 | *no_add_attrs = true; | |
8578 | ||
4917c376 | 8579 | size = TREE_VALUE (args); |
3e5a8b00 | 8580 | if (size && TREE_CODE (size) != IDENTIFIER_NODE |
8581 | && TREE_CODE (size) != FUNCTION_DECL) | |
caf62483 | 8582 | size = default_conversion (size); |
4917c376 | 8583 | |
e913b5cd | 8584 | if (!tree_fits_uhwi_p (size)) |
f8e93a2e | 8585 | { |
9b2d6d13 | 8586 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 8587 | return NULL_TREE; |
8588 | } | |
8589 | ||
8590 | /* Get the vector size (in bytes). */ | |
e913b5cd | 8591 | vecsize = tree_to_uhwi (size); |
f8e93a2e | 8592 | |
8593 | /* We need to provide for vector pointers, vector arrays, and | |
8594 | functions returning vectors. For example: | |
8595 | ||
8596 | __attribute__((vector_size(16))) short *foo; | |
8597 | ||
8598 | In this case, the mode is SI, but the type being modified is | |
8599 | HI, so we need to look further. */ | |
8600 | ||
8601 | while (POINTER_TYPE_P (type) | |
8602 | || TREE_CODE (type) == FUNCTION_TYPE | |
5bfb0742 | 8603 | || TREE_CODE (type) == METHOD_TYPE |
2cb0e5d9 | 8604 | || TREE_CODE (type) == ARRAY_TYPE |
8605 | || TREE_CODE (type) == OFFSET_TYPE) | |
f8e93a2e | 8606 | type = TREE_TYPE (type); |
8607 | ||
8608 | /* Get the mode of the type being modified. */ | |
8609 | orig_mode = TYPE_MODE (type); | |
8610 | ||
2cb0e5d9 | 8611 | if ((!INTEGRAL_TYPE_P (type) |
8612 | && !SCALAR_FLOAT_TYPE_P (type) | |
8613 | && !FIXED_POINT_TYPE_P (type)) | |
cee7491d | 8614 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
9421ebb9 | 8615 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
8616 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
e913b5cd | 8617 | || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type)) |
7ec31215 | 8618 | || TREE_CODE (type) == BOOLEAN_TYPE) |
f8e93a2e | 8619 | { |
782858b8 | 8620 | error ("invalid vector type for attribute %qE", name); |
f8e93a2e | 8621 | return NULL_TREE; |
8622 | } | |
8623 | ||
e913b5cd | 8624 | if (vecsize % tree_to_uhwi (TYPE_SIZE_UNIT (type))) |
39cc3e6d | 8625 | { |
8626 | error ("vector size not an integral multiple of component size"); | |
8627 | return NULL; | |
8628 | } | |
8629 | ||
8630 | if (vecsize == 0) | |
8631 | { | |
8632 | error ("zero vector size"); | |
8633 | return NULL; | |
8634 | } | |
8635 | ||
f8e93a2e | 8636 | /* Calculate how many units fit in the vector. */ |
e913b5cd | 8637 | nunits = vecsize / tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
83e2a11b | 8638 | if (nunits & (nunits - 1)) |
f8e93a2e | 8639 | { |
83e2a11b | 8640 | error ("number of components of the vector not a power of two"); |
f8e93a2e | 8641 | return NULL_TREE; |
8642 | } | |
8643 | ||
83e2a11b | 8644 | new_type = build_vector_type (type, nunits); |
f8e93a2e | 8645 | |
8646 | /* Build back pointers if needed. */ | |
d991e6e8 | 8647 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
f8e93a2e | 8648 | |
8649 | return NULL_TREE; | |
8650 | } | |
8651 | ||
dbf6c367 | 8652 | /* Handle the "nonnull" attribute. */ |
8653 | static tree | |
9a03a746 | 8654 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
8655 | tree args, int ARG_UNUSED (flags), | |
09347743 | 8656 | bool *no_add_attrs) |
dbf6c367 | 8657 | { |
8658 | tree type = *node; | |
8659 | unsigned HOST_WIDE_INT attr_arg_num; | |
8660 | ||
8661 | /* If no arguments are specified, all pointer arguments should be | |
d716ce75 | 8662 | non-null. Verify a full prototype is given so that the arguments |
dbf6c367 | 8663 | will have the correct types when we actually check them later. */ |
84166705 | 8664 | if (!args) |
dbf6c367 | 8665 | { |
a36cf284 | 8666 | if (!prototype_p (type)) |
dbf6c367 | 8667 | { |
8668 | error ("nonnull attribute without arguments on a non-prototype"); | |
4ee9c684 | 8669 | *no_add_attrs = true; |
dbf6c367 | 8670 | } |
8671 | return NULL_TREE; | |
8672 | } | |
8673 | ||
8674 | /* Argument list specified. Verify that each argument number references | |
8675 | a pointer argument. */ | |
caf62483 | 8676 | for (attr_arg_num = 1; args; attr_arg_num++, args = TREE_CHAIN (args)) |
dbf6c367 | 8677 | { |
4ee9c684 | 8678 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
dbf6c367 | 8679 | |
caf62483 | 8680 | tree arg = TREE_VALUE (args); |
8681 | if (arg && TREE_CODE (arg) != IDENTIFIER_NODE | |
8682 | && TREE_CODE (arg) != FUNCTION_DECL) | |
8683 | arg = default_conversion (arg); | |
8684 | ||
8685 | if (!get_nonnull_operand (arg, &arg_num)) | |
dbf6c367 | 8686 | { |
07e3a3d2 | 8687 | error ("nonnull argument has invalid operand number (argument %lu)", |
dbf6c367 | 8688 | (unsigned long) attr_arg_num); |
8689 | *no_add_attrs = true; | |
8690 | return NULL_TREE; | |
8691 | } | |
8692 | ||
d0af78c5 | 8693 | if (prototype_p (type)) |
dbf6c367 | 8694 | { |
d0af78c5 | 8695 | function_args_iterator iter; |
8696 | tree argument; | |
8697 | ||
8698 | function_args_iter_init (&iter, type); | |
8699 | for (ck_num = 1; ; ck_num++, function_args_iter_next (&iter)) | |
dbf6c367 | 8700 | { |
d0af78c5 | 8701 | argument = function_args_iter_cond (&iter); |
8702 | if (argument == NULL_TREE || ck_num == arg_num) | |
dbf6c367 | 8703 | break; |
dbf6c367 | 8704 | } |
8705 | ||
84166705 | 8706 | if (!argument |
d0af78c5 | 8707 | || TREE_CODE (argument) == VOID_TYPE) |
dbf6c367 | 8708 | { |
07e3a3d2 | 8709 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
dbf6c367 | 8710 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
8711 | *no_add_attrs = true; | |
8712 | return NULL_TREE; | |
8713 | } | |
8714 | ||
d0af78c5 | 8715 | if (TREE_CODE (argument) != POINTER_TYPE) |
dbf6c367 | 8716 | { |
07e3a3d2 | 8717 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
dbf6c367 | 8718 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
8719 | *no_add_attrs = true; | |
8720 | return NULL_TREE; | |
8721 | } | |
8722 | } | |
8723 | } | |
8724 | ||
8725 | return NULL_TREE; | |
8726 | } | |
8727 | ||
8728 | /* Check the argument list of a function call for null in argument slots | |
d01f58f9 | 8729 | that are marked as requiring a non-null pointer argument. The NARGS |
8730 | arguments are passed in the array ARGARRAY. | |
8731 | */ | |
dbf6c367 | 8732 | |
8733 | static void | |
d01f58f9 | 8734 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
dbf6c367 | 8735 | { |
9ca77b08 | 8736 | tree a; |
d01f58f9 | 8737 | int i; |
dbf6c367 | 8738 | |
9ca77b08 | 8739 | attrs = lookup_attribute ("nonnull", attrs); |
8740 | if (attrs == NULL_TREE) | |
8741 | return; | |
8742 | ||
8743 | a = attrs; | |
8744 | /* See if any of the nonnull attributes has no arguments. If so, | |
8745 | then every pointer argument is checked (in which case the check | |
8746 | for pointer type is done in check_nonnull_arg). */ | |
8747 | if (TREE_VALUE (a) != NULL_TREE) | |
8748 | do | |
8749 | a = lookup_attribute ("nonnull", TREE_CHAIN (a)); | |
8750 | while (a != NULL_TREE && TREE_VALUE (a) != NULL_TREE); | |
8751 | ||
8752 | if (a != NULL_TREE) | |
8753 | for (i = 0; i < nargs; i++) | |
8754 | check_function_arguments_recurse (check_nonnull_arg, NULL, argarray[i], | |
8755 | i + 1); | |
8756 | else | |
dbf6c367 | 8757 | { |
9ca77b08 | 8758 | /* Walk the argument list. If we encounter an argument number we |
8759 | should check for non-null, do it. */ | |
8760 | for (i = 0; i < nargs; i++) | |
dbf6c367 | 8761 | { |
9ca77b08 | 8762 | for (a = attrs; ; a = TREE_CHAIN (a)) |
4ee9c684 | 8763 | { |
9ca77b08 | 8764 | a = lookup_attribute ("nonnull", a); |
8765 | if (a == NULL_TREE || nonnull_check_p (TREE_VALUE (a), i + 1)) | |
8766 | break; | |
4ee9c684 | 8767 | } |
9ca77b08 | 8768 | |
8769 | if (a != NULL_TREE) | |
8770 | check_function_arguments_recurse (check_nonnull_arg, NULL, | |
8771 | argarray[i], i + 1); | |
dbf6c367 | 8772 | } |
8773 | } | |
8774 | } | |
8775 | ||
50ca527f | 8776 | /* Check that the Nth argument of a function call (counting backwards |
d01f58f9 | 8777 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
8778 | array ARGARRAY. */ | |
bf6c8de0 | 8779 | |
8780 | static void | |
774e9d58 | 8781 | check_function_sentinel (const_tree fntype, int nargs, tree *argarray) |
bf6c8de0 | 8782 | { |
774e9d58 | 8783 | tree attr = lookup_attribute ("sentinel", TYPE_ATTRIBUTES (fntype)); |
bf6c8de0 | 8784 | |
8785 | if (attr) | |
8786 | { | |
d01f58f9 | 8787 | int len = 0; |
8788 | int pos = 0; | |
8789 | tree sentinel; | |
774e9d58 | 8790 | function_args_iterator iter; |
8791 | tree t; | |
a0c938f0 | 8792 | |
d01f58f9 | 8793 | /* Skip over the named arguments. */ |
774e9d58 | 8794 | FOREACH_FUNCTION_ARGS (fntype, t, iter) |
a0c938f0 | 8795 | { |
774e9d58 | 8796 | if (len == nargs) |
8797 | break; | |
d01f58f9 | 8798 | len++; |
8799 | } | |
50ca527f | 8800 | |
d01f58f9 | 8801 | if (TREE_VALUE (attr)) |
8802 | { | |
8803 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
f9ae6f95 | 8804 | pos = TREE_INT_CST_LOW (p); |
d01f58f9 | 8805 | } |
50ca527f | 8806 | |
d01f58f9 | 8807 | /* The sentinel must be one of the varargs, i.e. |
8808 | in position >= the number of fixed arguments. */ | |
8809 | if ((nargs - 1 - pos) < len) | |
8810 | { | |
77a357e3 | 8811 | warning (OPT_Wformat_, |
d01f58f9 | 8812 | "not enough variable arguments to fit a sentinel"); |
8813 | return; | |
bf6c8de0 | 8814 | } |
d01f58f9 | 8815 | |
8816 | /* Validate the sentinel. */ | |
8817 | sentinel = argarray[nargs - 1 - pos]; | |
8818 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
8819 | || !integer_zerop (sentinel)) | |
8820 | /* Although __null (in C++) is only an integer we allow it | |
8821 | nevertheless, as we are guaranteed that it's exactly | |
8822 | as wide as a pointer, and we don't want to force | |
8823 | users to cast the NULL they have written there. | |
8824 | We warn with -Wstrict-null-sentinel, though. */ | |
8825 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
77a357e3 | 8826 | warning (OPT_Wformat_, "missing sentinel in function call"); |
bf6c8de0 | 8827 | } |
8828 | } | |
8829 | ||
dbf6c367 | 8830 | /* Helper for check_function_nonnull; given a list of operands which |
8831 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
8832 | checked. */ | |
8833 | ||
8834 | static bool | |
1cae46be | 8835 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 8836 | { |
4ee9c684 | 8837 | unsigned HOST_WIDE_INT arg_num = 0; |
dbf6c367 | 8838 | |
8839 | for (; args; args = TREE_CHAIN (args)) | |
8840 | { | |
231bd014 | 8841 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
8842 | ||
8843 | gcc_assert (found); | |
dbf6c367 | 8844 | |
8845 | if (arg_num == param_num) | |
8846 | return true; | |
8847 | } | |
8848 | return false; | |
8849 | } | |
8850 | ||
8851 | /* Check that the function argument PARAM (which is operand number | |
8852 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
8853 | via check_function_arguments_recurse. */ | |
8854 | ||
8855 | static void | |
9a03a746 | 8856 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
1cae46be | 8857 | unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 8858 | { |
8859 | /* Just skip checking the argument if it's not a pointer. This can | |
8860 | happen if the "nonnull" attribute was given without an operand | |
8861 | list (which means to check every pointer argument). */ | |
8862 | ||
8863 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
8864 | return; | |
8865 | ||
8866 | if (integer_zerop (param)) | |
155b601b | 8867 | warning (OPT_Wnonnull, "null argument where non-null required " |
8868 | "(argument %lu)", (unsigned long) param_num); | |
dbf6c367 | 8869 | } |
8870 | ||
8871 | /* Helper for nonnull attribute handling; fetch the operand number | |
8872 | from the attribute argument list. */ | |
8873 | ||
8874 | static bool | |
1cae46be | 8875 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
dbf6c367 | 8876 | { |
e913b5cd | 8877 | /* Verify the arg number is a small constant. */ |
e1d65c9f | 8878 | if (tree_fits_uhwi_p (arg_num_expr)) |
e913b5cd | 8879 | { |
f9ae6f95 | 8880 | *valp = TREE_INT_CST_LOW (arg_num_expr); |
e913b5cd | 8881 | return true; |
8882 | } | |
8883 | else | |
dbf6c367 | 8884 | return false; |
dbf6c367 | 8885 | } |
fa987697 | 8886 | |
8887 | /* Handle a "nothrow" attribute; arguments as in | |
8888 | struct attribute_spec.handler. */ | |
8889 | ||
8890 | static tree | |
9a03a746 | 8891 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
8892 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
fa987697 | 8893 | { |
8894 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
8895 | TREE_NOTHROW (*node) = 1; | |
8896 | /* ??? TODO: Support types. */ | |
8897 | else | |
8898 | { | |
9b2d6d13 | 8899 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
fa987697 | 8900 | *no_add_attrs = true; |
8901 | } | |
8902 | ||
8903 | return NULL_TREE; | |
8904 | } | |
7acb29a3 | 8905 | |
8906 | /* Handle a "cleanup" attribute; arguments as in | |
8907 | struct attribute_spec.handler. */ | |
8908 | ||
8909 | static tree | |
1cae46be | 8910 | handle_cleanup_attribute (tree *node, tree name, tree args, |
9a03a746 | 8911 | int ARG_UNUSED (flags), bool *no_add_attrs) |
7acb29a3 | 8912 | { |
8913 | tree decl = *node; | |
8914 | tree cleanup_id, cleanup_decl; | |
8915 | ||
8916 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
8917 | for global destructors in C++. This requires infrastructure that | |
8918 | we don't have generically at the moment. It's also not a feature | |
8919 | we'd be missing too much, since we do have attribute constructor. */ | |
8920 | if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)) | |
8921 | { | |
9b2d6d13 | 8922 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
7acb29a3 | 8923 | *no_add_attrs = true; |
8924 | return NULL_TREE; | |
8925 | } | |
8926 | ||
8927 | /* Verify that the argument is a function in scope. */ | |
8928 | /* ??? We could support pointers to functions here as well, if | |
8929 | that was considered desirable. */ | |
8930 | cleanup_id = TREE_VALUE (args); | |
8931 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
8932 | { | |
07e3a3d2 | 8933 | error ("cleanup argument not an identifier"); |
7acb29a3 | 8934 | *no_add_attrs = true; |
8935 | return NULL_TREE; | |
8936 | } | |
d1c41717 | 8937 | cleanup_decl = lookup_name (cleanup_id); |
7acb29a3 | 8938 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
8939 | { | |
07e3a3d2 | 8940 | error ("cleanup argument not a function"); |
7acb29a3 | 8941 | *no_add_attrs = true; |
8942 | return NULL_TREE; | |
8943 | } | |
8944 | ||
1cae46be | 8945 | /* That the function has proper type is checked with the |
7acb29a3 | 8946 | eventual call to build_function_call. */ |
8947 | ||
8948 | return NULL_TREE; | |
8949 | } | |
8a8cdb8d | 8950 | |
8951 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
8952 | ||
8953 | static tree | |
8954 | handle_warn_unused_result_attribute (tree *node, tree name, | |
9a03a746 | 8955 | tree ARG_UNUSED (args), |
8956 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8a8cdb8d | 8957 | { |
8958 | /* Ignore the attribute for functions not returning any value. */ | |
8959 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
8960 | { | |
9b2d6d13 | 8961 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
8a8cdb8d | 8962 | *no_add_attrs = true; |
8963 | } | |
8964 | ||
8965 | return NULL_TREE; | |
8966 | } | |
bf6c8de0 | 8967 | |
8968 | /* Handle a "sentinel" attribute. */ | |
8969 | ||
8970 | static tree | |
50ca527f | 8971 | handle_sentinel_attribute (tree *node, tree name, tree args, |
bf6c8de0 | 8972 | int ARG_UNUSED (flags), bool *no_add_attrs) |
8973 | { | |
a36cf284 | 8974 | if (!prototype_p (*node)) |
bf6c8de0 | 8975 | { |
9b2d6d13 | 8976 | warning (OPT_Wattributes, |
8977 | "%qE attribute requires prototypes with named arguments", name); | |
bf6c8de0 | 8978 | *no_add_attrs = true; |
bf6c8de0 | 8979 | } |
50ca527f | 8980 | else |
8981 | { | |
c33080b9 | 8982 | if (!stdarg_p (*node)) |
a0c938f0 | 8983 | { |
9b2d6d13 | 8984 | warning (OPT_Wattributes, |
8985 | "%qE attribute only applies to variadic functions", name); | |
50ca527f | 8986 | *no_add_attrs = true; |
8987 | } | |
8988 | } | |
a0c938f0 | 8989 | |
50ca527f | 8990 | if (args) |
bf6c8de0 | 8991 | { |
50ca527f | 8992 | tree position = TREE_VALUE (args); |
3e5a8b00 | 8993 | if (position && TREE_CODE (position) != IDENTIFIER_NODE |
8994 | && TREE_CODE (position) != FUNCTION_DECL) | |
8995 | position = default_conversion (position); | |
50ca527f | 8996 | |
3e5a8b00 | 8997 | if (TREE_CODE (position) != INTEGER_CST |
8998 | || !INTEGRAL_TYPE_P (TREE_TYPE (position))) | |
a0c938f0 | 8999 | { |
48e1416a | 9000 | warning (OPT_Wattributes, |
01b54db5 | 9001 | "requested position is not an integer constant"); |
50ca527f | 9002 | *no_add_attrs = true; |
9003 | } | |
9004 | else | |
a0c938f0 | 9005 | { |
50ca527f | 9006 | if (tree_int_cst_lt (position, integer_zero_node)) |
9007 | { | |
01b54db5 | 9008 | warning (OPT_Wattributes, |
9009 | "requested position is less than zero"); | |
50ca527f | 9010 | *no_add_attrs = true; |
9011 | } | |
9012 | } | |
bf6c8de0 | 9013 | } |
a0c938f0 | 9014 | |
bf6c8de0 | 9015 | return NULL_TREE; |
9016 | } | |
b5c26b42 | 9017 | |
9018 | /* Handle a "type_generic" attribute. */ | |
9019 | ||
9020 | static tree | |
9021 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
9022 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
9023 | bool * ARG_UNUSED (no_add_attrs)) | |
9024 | { | |
19fbe3a4 | 9025 | /* Ensure we have a function type. */ |
9026 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
48e1416a | 9027 | |
19fbe3a4 | 9028 | /* Ensure we have a variadic function. */ |
c33080b9 | 9029 | gcc_assert (!prototype_p (*node) || stdarg_p (*node)); |
b5c26b42 | 9030 | |
9031 | return NULL_TREE; | |
9032 | } | |
46f8e3b0 | 9033 | |
24470055 | 9034 | /* Handle a "target" attribute. */ |
46f8e3b0 | 9035 | |
9036 | static tree | |
24470055 | 9037 | handle_target_attribute (tree *node, tree name, tree args, int flags, |
46f8e3b0 | 9038 | bool *no_add_attrs) |
9039 | { | |
9040 | /* Ensure we have a function type. */ | |
9041 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9042 | { | |
9043 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9044 | *no_add_attrs = true; | |
9045 | } | |
46f8e3b0 | 9046 | else if (! targetm.target_option.valid_attribute_p (*node, name, args, |
ae0c3984 | 9047 | flags)) |
46f8e3b0 | 9048 | *no_add_attrs = true; |
9049 | ||
9050 | return NULL_TREE; | |
9051 | } | |
9052 | ||
9053 | /* Arguments being collected for optimization. */ | |
9054 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
f1f41a6c | 9055 | static GTY(()) vec<const_char_p, va_gc> *optimize_args; |
46f8e3b0 | 9056 | |
9057 | ||
9058 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
9059 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
9060 | false for #pragma GCC optimize. */ | |
9061 | ||
9062 | bool | |
9063 | parse_optimize_options (tree args, bool attr_p) | |
9064 | { | |
9065 | bool ret = true; | |
9066 | unsigned opt_argc; | |
9067 | unsigned i; | |
2becf397 | 9068 | int saved_flag_strict_aliasing; |
46f8e3b0 | 9069 | const char **opt_argv; |
615ef0bb | 9070 | struct cl_decoded_option *decoded_options; |
9071 | unsigned int decoded_options_count; | |
46f8e3b0 | 9072 | tree ap; |
9073 | ||
9074 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
9075 | collected strings. */ | |
f1f41a6c | 9076 | vec_safe_truncate (optimize_args, 0); |
9077 | vec_safe_push (optimize_args, (const char *) NULL); | |
46f8e3b0 | 9078 | |
9079 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
9080 | { | |
9081 | tree value = TREE_VALUE (ap); | |
9082 | ||
9083 | if (TREE_CODE (value) == INTEGER_CST) | |
9084 | { | |
9085 | char buffer[20]; | |
f9ae6f95 | 9086 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); |
f1f41a6c | 9087 | vec_safe_push (optimize_args, ggc_strdup (buffer)); |
46f8e3b0 | 9088 | } |
9089 | ||
9090 | else if (TREE_CODE (value) == STRING_CST) | |
9091 | { | |
9092 | /* Split string into multiple substrings. */ | |
9093 | size_t len = TREE_STRING_LENGTH (value); | |
9094 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
9095 | char *end = p + len; | |
9096 | char *comma; | |
9097 | char *next_p = p; | |
9098 | ||
9099 | while (next_p != NULL) | |
9100 | { | |
9101 | size_t len2; | |
9102 | char *q, *r; | |
9103 | ||
9104 | p = next_p; | |
9105 | comma = strchr (p, ','); | |
9106 | if (comma) | |
9107 | { | |
9108 | len2 = comma - p; | |
9109 | *comma = '\0'; | |
9110 | next_p = comma+1; | |
9111 | } | |
9112 | else | |
9113 | { | |
9114 | len2 = end - p; | |
9115 | next_p = NULL; | |
9116 | } | |
9117 | ||
ba72912a | 9118 | r = q = (char *) ggc_alloc_atomic (len2 + 3); |
46f8e3b0 | 9119 | |
9120 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx | |
9121 | options. */ | |
9122 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
9123 | { | |
9124 | ret = false; | |
9125 | if (attr_p) | |
9126 | warning (OPT_Wattributes, | |
ebd7c4c1 | 9127 | "bad option %s to optimize attribute", p); |
46f8e3b0 | 9128 | else |
9129 | warning (OPT_Wpragmas, | |
e44b0a1f | 9130 | "bad option %s to pragma attribute", p); |
46f8e3b0 | 9131 | continue; |
9132 | } | |
9133 | ||
9134 | if (*p != '-') | |
9135 | { | |
9136 | *r++ = '-'; | |
9137 | ||
9138 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
9139 | itself is -Os, and any other switch begins with a -f. */ | |
9140 | if ((*p >= '0' && *p <= '9') | |
9141 | || (p[0] == 's' && p[1] == '\0')) | |
9142 | *r++ = 'O'; | |
9143 | else if (*p != 'O') | |
9144 | *r++ = 'f'; | |
9145 | } | |
9146 | ||
9147 | memcpy (r, p, len2); | |
9148 | r[len2] = '\0'; | |
f1f41a6c | 9149 | vec_safe_push (optimize_args, (const char *) q); |
46f8e3b0 | 9150 | } |
9151 | ||
9152 | } | |
9153 | } | |
9154 | ||
f1f41a6c | 9155 | opt_argc = optimize_args->length (); |
46f8e3b0 | 9156 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); |
9157 | ||
9158 | for (i = 1; i < opt_argc; i++) | |
f1f41a6c | 9159 | opt_argv[i] = (*optimize_args)[i]; |
46f8e3b0 | 9160 | |
2becf397 | 9161 | saved_flag_strict_aliasing = flag_strict_aliasing; |
9162 | ||
46f8e3b0 | 9163 | /* Now parse the options. */ |
f3f006ad | 9164 | decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv, |
9165 | &decoded_options, | |
9166 | &decoded_options_count); | |
9167 | decode_options (&global_options, &global_options_set, | |
3c6c0e40 | 9168 | decoded_options, decoded_options_count, |
9169 | input_location, global_dc); | |
46f8e3b0 | 9170 | |
4bec06b3 | 9171 | targetm.override_options_after_change(); |
9172 | ||
2becf397 | 9173 | /* Don't allow changing -fstrict-aliasing. */ |
9174 | flag_strict_aliasing = saved_flag_strict_aliasing; | |
9175 | ||
f1f41a6c | 9176 | optimize_args->truncate (0); |
46f8e3b0 | 9177 | return ret; |
9178 | } | |
9179 | ||
9180 | /* For handling "optimize" attribute. arguments as in | |
9181 | struct attribute_spec.handler. */ | |
9182 | ||
9183 | static tree | |
9184 | handle_optimize_attribute (tree *node, tree name, tree args, | |
9185 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
9186 | { | |
9187 | /* Ensure we have a function type. */ | |
9188 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
9189 | { | |
9190 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
9191 | *no_add_attrs = true; | |
9192 | } | |
9193 | else | |
9194 | { | |
9195 | struct cl_optimization cur_opts; | |
9196 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
9197 | ||
9198 | /* Save current options. */ | |
2c5d2e39 | 9199 | cl_optimization_save (&cur_opts, &global_options); |
46f8e3b0 | 9200 | |
9201 | /* If we previously had some optimization options, use them as the | |
9202 | default. */ | |
9203 | if (old_opts) | |
2c5d2e39 | 9204 | cl_optimization_restore (&global_options, |
9205 | TREE_OPTIMIZATION (old_opts)); | |
46f8e3b0 | 9206 | |
9207 | /* Parse options, and update the vector. */ | |
9208 | parse_optimize_options (args, true); | |
9209 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
55310327 | 9210 | = build_optimization_node (&global_options); |
46f8e3b0 | 9211 | |
9212 | /* Restore current options. */ | |
2c5d2e39 | 9213 | cl_optimization_restore (&global_options, &cur_opts); |
46f8e3b0 | 9214 | } |
9215 | ||
9216 | return NULL_TREE; | |
9217 | } | |
48b14f50 | 9218 | |
9219 | /* Handle a "no_split_stack" attribute. */ | |
9220 | ||
9221 | static tree | |
9222 | handle_no_split_stack_attribute (tree *node, tree name, | |
9223 | tree ARG_UNUSED (args), | |
9224 | int ARG_UNUSED (flags), | |
9225 | bool *no_add_attrs) | |
9226 | { | |
9227 | tree decl = *node; | |
9228 | ||
9229 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
9230 | { | |
9231 | error_at (DECL_SOURCE_LOCATION (decl), | |
9232 | "%qE attribute applies only to functions", name); | |
9233 | *no_add_attrs = true; | |
9234 | } | |
9235 | else if (DECL_INITIAL (decl)) | |
9236 | { | |
9237 | error_at (DECL_SOURCE_LOCATION (decl), | |
9238 | "can%'t set %qE attribute after definition", name); | |
9239 | *no_add_attrs = true; | |
9240 | } | |
9241 | ||
9242 | return NULL_TREE; | |
9243 | } | |
d7dcba40 | 9244 | |
9245 | /* Handle a "returns_nonnull" attribute; arguments as in | |
9246 | struct attribute_spec.handler. */ | |
9247 | ||
9248 | static tree | |
9249 | handle_returns_nonnull_attribute (tree *node, tree, tree, int, | |
9250 | bool *no_add_attrs) | |
9251 | { | |
9252 | // Even without a prototype we still have a return type we can check. | |
9253 | if (TREE_CODE (TREE_TYPE (*node)) != POINTER_TYPE) | |
9254 | { | |
9255 | error ("returns_nonnull attribute on a function not returning a pointer"); | |
9256 | *no_add_attrs = true; | |
9257 | } | |
9258 | return NULL_TREE; | |
9259 | } | |
9260 | ||
74691f46 | 9261 | /* Handle a "designated_init" attribute; arguments as in |
9262 | struct attribute_spec.handler. */ | |
9263 | ||
9264 | static tree | |
9265 | handle_designated_init_attribute (tree *node, tree name, tree, int, | |
9266 | bool *no_add_attrs) | |
9267 | { | |
9268 | if (TREE_CODE (*node) != RECORD_TYPE) | |
9269 | { | |
9270 | error ("%qE attribute is only valid on %<struct%> type", name); | |
9271 | *no_add_attrs = true; | |
9272 | } | |
9273 | return NULL_TREE; | |
9274 | } | |
9275 | ||
dbf6c367 | 9276 | \f |
774e9d58 | 9277 | /* Check for valid arguments being passed to a function with FNTYPE. |
9278 | There are NARGS arguments in the array ARGARRAY. */ | |
dbf6c367 | 9279 | void |
774e9d58 | 9280 | check_function_arguments (const_tree fntype, int nargs, tree *argarray) |
dbf6c367 | 9281 | { |
9282 | /* Check for null being passed in a pointer argument that must be | |
9283 | non-null. We also need to do this if format checking is enabled. */ | |
9284 | ||
9285 | if (warn_nonnull) | |
774e9d58 | 9286 | check_function_nonnull (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
dbf6c367 | 9287 | |
9288 | /* Check for errors in format strings. */ | |
9289 | ||
068bea1e | 9290 | if (warn_format || warn_suggest_attribute_format) |
774e9d58 | 9291 | check_function_format (TYPE_ATTRIBUTES (fntype), nargs, argarray); |
95c90e04 | 9292 | |
9293 | if (warn_format) | |
774e9d58 | 9294 | check_function_sentinel (fntype, nargs, argarray); |
dbf6c367 | 9295 | } |
9296 | ||
9297 | /* Generic argument checking recursion routine. PARAM is the argument to | |
9298 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
9299 | once the argument is resolved. CTX is context for the callback. */ | |
9300 | void | |
1cae46be | 9301 | check_function_arguments_recurse (void (*callback) |
9302 | (void *, tree, unsigned HOST_WIDE_INT), | |
9303 | void *ctx, tree param, | |
9304 | unsigned HOST_WIDE_INT param_num) | |
dbf6c367 | 9305 | { |
72dd6141 | 9306 | if (CONVERT_EXPR_P (param) |
c44afe23 | 9307 | && (TYPE_PRECISION (TREE_TYPE (param)) |
9308 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
dbf6c367 | 9309 | { |
9310 | /* Strip coercion. */ | |
9311 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 9312 | TREE_OPERAND (param, 0), param_num); |
dbf6c367 | 9313 | return; |
9314 | } | |
9315 | ||
9316 | if (TREE_CODE (param) == CALL_EXPR) | |
9317 | { | |
c2f47e15 | 9318 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
dbf6c367 | 9319 | tree attrs; |
9320 | bool found_format_arg = false; | |
9321 | ||
9322 | /* See if this is a call to a known internationalization function | |
9323 | that modifies a format arg. Such a function may have multiple | |
9324 | format_arg attributes (for example, ngettext). */ | |
9325 | ||
9326 | for (attrs = TYPE_ATTRIBUTES (type); | |
9327 | attrs; | |
9328 | attrs = TREE_CHAIN (attrs)) | |
9329 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
9330 | { | |
c2f47e15 | 9331 | tree inner_arg; |
dbf6c367 | 9332 | tree format_num_expr; |
9333 | int format_num; | |
9334 | int i; | |
c2f47e15 | 9335 | call_expr_arg_iterator iter; |
dbf6c367 | 9336 | |
9337 | /* Extract the argument number, which was previously checked | |
9338 | to be valid. */ | |
9339 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
ddb1be65 | 9340 | |
e913b5cd | 9341 | format_num = tree_to_uhwi (format_num_expr); |
dbf6c367 | 9342 | |
c2f47e15 | 9343 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
9344 | inner_arg != 0; | |
9345 | inner_arg = next_call_expr_arg (&iter), i++) | |
dbf6c367 | 9346 | if (i == format_num) |
9347 | { | |
9348 | check_function_arguments_recurse (callback, ctx, | |
c2f47e15 | 9349 | inner_arg, param_num); |
dbf6c367 | 9350 | found_format_arg = true; |
9351 | break; | |
9352 | } | |
9353 | } | |
9354 | ||
9355 | /* If we found a format_arg attribute and did a recursive check, | |
9356 | we are done with checking this argument. Otherwise, we continue | |
9357 | and this will be considered a non-literal. */ | |
9358 | if (found_format_arg) | |
9359 | return; | |
9360 | } | |
9361 | ||
9362 | if (TREE_CODE (param) == COND_EXPR) | |
9363 | { | |
9364 | /* Check both halves of the conditional expression. */ | |
9365 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 9366 | TREE_OPERAND (param, 1), param_num); |
dbf6c367 | 9367 | check_function_arguments_recurse (callback, ctx, |
4ee9c684 | 9368 | TREE_OPERAND (param, 2), param_num); |
dbf6c367 | 9369 | return; |
9370 | } | |
9371 | ||
9372 | (*callback) (ctx, param, param_num); | |
9373 | } | |
1f3233d1 | 9374 | |
60cce472 | 9375 | /* Checks for a builtin function FNDECL that the number of arguments |
9376 | NARGS against the required number REQUIRED and issues an error if | |
9377 | there is a mismatch. Returns true if the number of arguments is | |
9378 | correct, otherwise false. */ | |
d43cee80 | 9379 | |
9380 | static bool | |
60cce472 | 9381 | builtin_function_validate_nargs (tree fndecl, int nargs, int required) |
d43cee80 | 9382 | { |
9383 | if (nargs < required) | |
9384 | { | |
60cce472 | 9385 | error_at (input_location, |
9386 | "not enough arguments to function %qE", fndecl); | |
d43cee80 | 9387 | return false; |
9388 | } | |
9389 | else if (nargs > required) | |
9390 | { | |
60cce472 | 9391 | error_at (input_location, |
9392 | "too many arguments to function %qE", fndecl); | |
d43cee80 | 9393 | return false; |
9394 | } | |
9395 | return true; | |
9396 | } | |
9397 | ||
9398 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
9399 | Returns false if there was an error, otherwise true. */ | |
9400 | ||
9401 | bool | |
9402 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
9403 | { | |
9404 | if (!DECL_BUILT_IN (fndecl) | |
9405 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
9406 | return true; | |
9407 | ||
9408 | switch (DECL_FUNCTION_CODE (fndecl)) | |
9409 | { | |
9410 | case BUILT_IN_CONSTANT_P: | |
60cce472 | 9411 | return builtin_function_validate_nargs (fndecl, nargs, 1); |
d43cee80 | 9412 | |
9413 | case BUILT_IN_ISFINITE: | |
9414 | case BUILT_IN_ISINF: | |
c319d56a | 9415 | case BUILT_IN_ISINF_SIGN: |
d43cee80 | 9416 | case BUILT_IN_ISNAN: |
9417 | case BUILT_IN_ISNORMAL: | |
60cce472 | 9418 | if (builtin_function_validate_nargs (fndecl, nargs, 1)) |
d43cee80 | 9419 | { |
9420 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
9421 | { | |
9422 | error ("non-floating-point argument in call to " | |
9423 | "function %qE", fndecl); | |
9424 | return false; | |
9425 | } | |
9426 | return true; | |
9427 | } | |
9428 | return false; | |
9429 | ||
9430 | case BUILT_IN_ISGREATER: | |
9431 | case BUILT_IN_ISGREATEREQUAL: | |
9432 | case BUILT_IN_ISLESS: | |
9433 | case BUILT_IN_ISLESSEQUAL: | |
9434 | case BUILT_IN_ISLESSGREATER: | |
9435 | case BUILT_IN_ISUNORDERED: | |
60cce472 | 9436 | if (builtin_function_validate_nargs (fndecl, nargs, 2)) |
d43cee80 | 9437 | { |
9438 | enum tree_code code0, code1; | |
9439 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
9440 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
9441 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
9442 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
9443 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
9444 | { | |
9445 | error ("non-floating-point arguments in call to " | |
9446 | "function %qE", fndecl); | |
9447 | return false; | |
9448 | } | |
9449 | return true; | |
9450 | } | |
9451 | return false; | |
9452 | ||
19fbe3a4 | 9453 | case BUILT_IN_FPCLASSIFY: |
60cce472 | 9454 | if (builtin_function_validate_nargs (fndecl, nargs, 6)) |
19fbe3a4 | 9455 | { |
9456 | unsigned i; | |
48e1416a | 9457 | |
19fbe3a4 | 9458 | for (i=0; i<5; i++) |
9459 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
9460 | { | |
9461 | error ("non-const integer argument %u in call to function %qE", | |
9462 | i+1, fndecl); | |
9463 | return false; | |
9464 | } | |
9465 | ||
9466 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
9467 | { | |
9468 | error ("non-floating-point argument in call to function %qE", | |
9469 | fndecl); | |
9470 | return false; | |
9471 | } | |
9472 | return true; | |
9473 | } | |
9474 | return false; | |
9475 | ||
fca0886c | 9476 | case BUILT_IN_ASSUME_ALIGNED: |
9477 | if (builtin_function_validate_nargs (fndecl, nargs, 2 + (nargs > 2))) | |
9478 | { | |
9479 | if (nargs >= 3 && TREE_CODE (TREE_TYPE (args[2])) != INTEGER_TYPE) | |
9480 | { | |
9481 | error ("non-integer argument 3 in call to function %qE", fndecl); | |
9482 | return false; | |
9483 | } | |
9484 | return true; | |
9485 | } | |
9486 | return false; | |
9487 | ||
d43cee80 | 9488 | default: |
9489 | return true; | |
9490 | } | |
9491 | } | |
9492 | ||
860251be | 9493 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
9494 | ||
9495 | int | |
9496 | field_decl_cmp (const void *x_p, const void *y_p) | |
9497 | { | |
4fd61bc6 | 9498 | const tree *const x = (const tree *const) x_p; |
9499 | const tree *const y = (const tree *const) y_p; | |
9500 | ||
860251be | 9501 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
9502 | /* A nontype is "greater" than a type. */ | |
9503 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
9504 | if (DECL_NAME (*x) == NULL_TREE) | |
9505 | return -1; | |
9506 | if (DECL_NAME (*y) == NULL_TREE) | |
9507 | return 1; | |
9508 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
9509 | return -1; | |
9510 | return 1; | |
9511 | } | |
9512 | ||
9513 | static struct { | |
9514 | gt_pointer_operator new_value; | |
9515 | void *cookie; | |
9516 | } resort_data; | |
9517 | ||
9518 | /* This routine compares two fields like field_decl_cmp but using the | |
9519 | pointer operator in resort_data. */ | |
9520 | ||
9521 | static int | |
9522 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
9523 | { | |
4fd61bc6 | 9524 | const tree *const x = (const tree *const) x_p; |
9525 | const tree *const y = (const tree *const) y_p; | |
860251be | 9526 | |
9527 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
9528 | /* A nontype is "greater" than a type. */ | |
9529 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
9530 | if (DECL_NAME (*x) == NULL_TREE) | |
9531 | return -1; | |
9532 | if (DECL_NAME (*y) == NULL_TREE) | |
9533 | return 1; | |
9534 | { | |
9535 | tree d1 = DECL_NAME (*x); | |
9536 | tree d2 = DECL_NAME (*y); | |
9537 | resort_data.new_value (&d1, resort_data.cookie); | |
9538 | resort_data.new_value (&d2, resort_data.cookie); | |
9539 | if (d1 < d2) | |
9540 | return -1; | |
9541 | } | |
9542 | return 1; | |
9543 | } | |
9544 | ||
9545 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
9546 | ||
9547 | void | |
9548 | resort_sorted_fields (void *obj, | |
9a03a746 | 9549 | void * ARG_UNUSED (orig_obj), |
4ee9c684 | 9550 | gt_pointer_operator new_value, |
9551 | void *cookie) | |
860251be | 9552 | { |
9a03a746 | 9553 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
860251be | 9554 | resort_data.new_value = new_value; |
9555 | resort_data.cookie = cookie; | |
9556 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
4ee9c684 | 9557 | resort_field_decl_cmp); |
860251be | 9558 | } |
9559 | ||
209c9752 | 9560 | /* Subroutine of c_parse_error. |
9561 | Return the result of concatenating LHS and RHS. RHS is really | |
9562 | a string literal, its first character is indicated by RHS_START and | |
cfee01e3 | 9563 | RHS_SIZE is its length (including the terminating NUL character). |
209c9752 | 9564 | |
9565 | The caller is responsible for deleting the returned pointer. */ | |
9566 | ||
9567 | static char * | |
9568 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
9569 | { | |
9570 | const int lhs_size = strlen (lhs); | |
9571 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
9572 | strncpy (result, lhs, lhs_size); | |
9573 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
9574 | return result; | |
9575 | } | |
9576 | ||
380c6697 | 9577 | /* Issue the error given by GMSGID, indicating that it occurred before |
92b128ed | 9578 | TOKEN, which had the associated VALUE. */ |
9579 | ||
9580 | void | |
48e1416a | 9581 | c_parse_error (const char *gmsgid, enum cpp_ttype token_type, |
ba99525e | 9582 | tree value, unsigned char token_flags) |
92b128ed | 9583 | { |
209c9752 | 9584 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
9585 | ||
9586 | char *message = NULL; | |
92b128ed | 9587 | |
ba99525e | 9588 | if (token_type == CPP_EOF) |
380c6697 | 9589 | message = catenate_messages (gmsgid, " at end of input"); |
48e1416a | 9590 | else if (token_type == CPP_CHAR |
9591 | || token_type == CPP_WCHAR | |
ba99525e | 9592 | || token_type == CPP_CHAR16 |
9593 | || token_type == CPP_CHAR32) | |
92b128ed | 9594 | { |
f9ae6f95 | 9595 | unsigned int val = TREE_INT_CST_LOW (value); |
924bbf02 | 9596 | const char *prefix; |
9597 | ||
ba99525e | 9598 | switch (token_type) |
924bbf02 | 9599 | { |
9600 | default: | |
9601 | prefix = ""; | |
9602 | break; | |
9603 | case CPP_WCHAR: | |
9604 | prefix = "L"; | |
9605 | break; | |
9606 | case CPP_CHAR16: | |
9607 | prefix = "u"; | |
9608 | break; | |
9609 | case CPP_CHAR32: | |
9610 | prefix = "U"; | |
9611 | break; | |
9612 | } | |
9613 | ||
92b128ed | 9614 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
a0c938f0 | 9615 | message = catenate_messages (gmsgid, " before %s'%c'"); |
92b128ed | 9616 | else |
a0c938f0 | 9617 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
209c9752 | 9618 | |
924bbf02 | 9619 | error (message, prefix, val); |
209c9752 | 9620 | free (message); |
9621 | message = NULL; | |
92b128ed | 9622 | } |
1898176c | 9623 | else if (token_type == CPP_CHAR_USERDEF |
9624 | || token_type == CPP_WCHAR_USERDEF | |
9625 | || token_type == CPP_CHAR16_USERDEF | |
9626 | || token_type == CPP_CHAR32_USERDEF) | |
9627 | message = catenate_messages (gmsgid, | |
9628 | " before user-defined character literal"); | |
9629 | else if (token_type == CPP_STRING_USERDEF | |
9630 | || token_type == CPP_WSTRING_USERDEF | |
9631 | || token_type == CPP_STRING16_USERDEF | |
9632 | || token_type == CPP_STRING32_USERDEF | |
9633 | || token_type == CPP_UTF8STRING_USERDEF) | |
9634 | message = catenate_messages (gmsgid, " before user-defined string literal"); | |
48e1416a | 9635 | else if (token_type == CPP_STRING |
9636 | || token_type == CPP_WSTRING | |
ba99525e | 9637 | || token_type == CPP_STRING16 |
538ba11a | 9638 | || token_type == CPP_STRING32 |
9639 | || token_type == CPP_UTF8STRING) | |
380c6697 | 9640 | message = catenate_messages (gmsgid, " before string constant"); |
ba99525e | 9641 | else if (token_type == CPP_NUMBER) |
380c6697 | 9642 | message = catenate_messages (gmsgid, " before numeric constant"); |
ba99525e | 9643 | else if (token_type == CPP_NAME) |
209c9752 | 9644 | { |
380c6697 | 9645 | message = catenate_messages (gmsgid, " before %qE"); |
782858b8 | 9646 | error (message, value); |
209c9752 | 9647 | free (message); |
9648 | message = NULL; | |
9649 | } | |
ba99525e | 9650 | else if (token_type == CPP_PRAGMA) |
b75b98aa | 9651 | message = catenate_messages (gmsgid, " before %<#pragma%>"); |
ba99525e | 9652 | else if (token_type == CPP_PRAGMA_EOL) |
b75b98aa | 9653 | message = catenate_messages (gmsgid, " before end of line"); |
07b8f133 | 9654 | else if (token_type == CPP_DECLTYPE) |
9655 | message = catenate_messages (gmsgid, " before %<decltype%>"); | |
ba99525e | 9656 | else if (token_type < N_TTYPES) |
209c9752 | 9657 | { |
380c6697 | 9658 | message = catenate_messages (gmsgid, " before %qs token"); |
ba99525e | 9659 | error (message, cpp_type2name (token_type, token_flags)); |
209c9752 | 9660 | free (message); |
9661 | message = NULL; | |
9662 | } | |
92b128ed | 9663 | else |
380c6697 | 9664 | error (gmsgid); |
209c9752 | 9665 | |
9666 | if (message) | |
9667 | { | |
9668 | error (message); | |
9669 | free (message); | |
9670 | } | |
a0c938f0 | 9671 | #undef catenate_messages |
92b128ed | 9672 | } |
9673 | ||
3a79f5da | 9674 | /* Mapping for cpp message reasons to the options that enable them. */ |
9675 | ||
9676 | struct reason_option_codes_t | |
9677 | { | |
9678 | const int reason; /* cpplib message reason. */ | |
9679 | const int option_code; /* gcc option that controls this message. */ | |
9680 | }; | |
9681 | ||
9682 | static const struct reason_option_codes_t option_codes[] = { | |
1babed5f | 9683 | {CPP_W_BUILTIN_MACRO_REDEFINED, OPT_Wbuiltin_macro_redefined}, |
67089c6b | 9684 | {CPP_W_COMMENTS, OPT_Wcomment}, |
1babed5f | 9685 | {CPP_W_CXX_OPERATOR_NAMES, OPT_Wc___compat}, |
9686 | {CPP_W_DATE_TIME, OPT_Wdate_time}, | |
9687 | {CPP_W_DEPRECATED, OPT_Wdeprecated}, | |
9688 | {CPP_W_ENDIF_LABELS, OPT_Wendif_labels}, | |
9689 | {CPP_W_INVALID_PCH, OPT_Winvalid_pch}, | |
9690 | {CPP_W_LITERAL_SUFFIX, OPT_Wliteral_suffix}, | |
9691 | {CPP_W_LONG_LONG, OPT_Wlong_long}, | |
9692 | {CPP_W_MISSING_INCLUDE_DIRS, OPT_Wmissing_include_dirs}, | |
3a79f5da | 9693 | {CPP_W_MULTICHAR, OPT_Wmultichar}, |
1babed5f | 9694 | {CPP_W_NORMALIZE, OPT_Wnormalized_}, |
3a79f5da | 9695 | {CPP_W_TRADITIONAL, OPT_Wtraditional}, |
1babed5f | 9696 | {CPP_W_TRIGRAPHS, OPT_Wtrigraphs}, |
3a79f5da | 9697 | {CPP_W_UNDEF, OPT_Wundef}, |
9698 | {CPP_W_UNUSED_MACROS, OPT_Wunused_macros}, | |
1babed5f | 9699 | {CPP_W_VARIADIC_MACROS, OPT_Wvariadic_macros}, |
3a79f5da | 9700 | {CPP_W_WARNING_DIRECTIVE, OPT_Wcpp}, |
9701 | {CPP_W_NONE, 0} | |
9702 | }; | |
9703 | ||
9704 | /* Return the gcc option code associated with the reason for a cpp | |
9705 | message, or 0 if none. */ | |
9706 | ||
9707 | static int | |
9708 | c_option_controlling_cpp_error (int reason) | |
9709 | { | |
9710 | const struct reason_option_codes_t *entry; | |
9711 | ||
9712 | for (entry = option_codes; entry->reason != CPP_W_NONE; entry++) | |
9713 | { | |
9714 | if (entry->reason == reason) | |
9715 | return entry->option_code; | |
9716 | } | |
9717 | return 0; | |
9718 | } | |
9719 | ||
7f5f3953 | 9720 | /* Callback from cpp_error for PFILE to print diagnostics from the |
3a79f5da | 9721 | preprocessor. The diagnostic is of type LEVEL, with REASON set |
9722 | to the reason code if LEVEL is represents a warning, at location | |
7f5f3953 | 9723 | LOCATION unless this is after lexing and the compiler's location |
9724 | should be used instead, with column number possibly overridden by | |
9725 | COLUMN_OVERRIDE if not zero; MSG is the translated message and AP | |
9726 | the arguments. Returns true if a diagnostic was emitted, false | |
9727 | otherwise. */ | |
9728 | ||
9729 | bool | |
3a79f5da | 9730 | c_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level, int reason, |
7f5f3953 | 9731 | location_t location, unsigned int column_override, |
9732 | const char *msg, va_list *ap) | |
9733 | { | |
9734 | diagnostic_info diagnostic; | |
9735 | diagnostic_t dlevel; | |
5ae82d58 | 9736 | bool save_warn_system_headers = global_dc->dc_warn_system_headers; |
7f5f3953 | 9737 | bool ret; |
9738 | ||
9739 | switch (level) | |
9740 | { | |
9741 | case CPP_DL_WARNING_SYSHDR: | |
9742 | if (flag_no_output) | |
9743 | return false; | |
5ae82d58 | 9744 | global_dc->dc_warn_system_headers = 1; |
7f5f3953 | 9745 | /* Fall through. */ |
9746 | case CPP_DL_WARNING: | |
9747 | if (flag_no_output) | |
9748 | return false; | |
9749 | dlevel = DK_WARNING; | |
9750 | break; | |
9751 | case CPP_DL_PEDWARN: | |
9752 | if (flag_no_output && !flag_pedantic_errors) | |
9753 | return false; | |
9754 | dlevel = DK_PEDWARN; | |
9755 | break; | |
9756 | case CPP_DL_ERROR: | |
9757 | dlevel = DK_ERROR; | |
9758 | break; | |
9759 | case CPP_DL_ICE: | |
9760 | dlevel = DK_ICE; | |
9761 | break; | |
9762 | case CPP_DL_NOTE: | |
9763 | dlevel = DK_NOTE; | |
9764 | break; | |
ff903809 | 9765 | case CPP_DL_FATAL: |
9766 | dlevel = DK_FATAL; | |
9767 | break; | |
7f5f3953 | 9768 | default: |
9769 | gcc_unreachable (); | |
9770 | } | |
9771 | if (done_lexing) | |
9772 | location = input_location; | |
9773 | diagnostic_set_info_translated (&diagnostic, msg, ap, | |
9774 | location, dlevel); | |
9775 | if (column_override) | |
9776 | diagnostic_override_column (&diagnostic, column_override); | |
3a79f5da | 9777 | diagnostic_override_option_index (&diagnostic, |
9778 | c_option_controlling_cpp_error (reason)); | |
7f5f3953 | 9779 | ret = report_diagnostic (&diagnostic); |
9780 | if (level == CPP_DL_WARNING_SYSHDR) | |
5ae82d58 | 9781 | global_dc->dc_warn_system_headers = save_warn_system_headers; |
7f5f3953 | 9782 | return ret; |
9783 | } | |
9784 | ||
624d37a6 | 9785 | /* Convert a character from the host to the target execution character |
9786 | set. cpplib handles this, mostly. */ | |
9787 | ||
9788 | HOST_WIDE_INT | |
9789 | c_common_to_target_charset (HOST_WIDE_INT c) | |
9790 | { | |
9791 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
9792 | zero-extended under -fno-signed-char. cpplib insists that characters | |
9793 | and character constants are always unsigned. Hence we must convert | |
9794 | back and forth. */ | |
9795 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
9796 | ||
9797 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
9798 | ||
9799 | if (flag_signed_char) | |
9800 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
9801 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
9802 | else | |
9803 | return uc; | |
9804 | } | |
9805 | ||
7549df0d | 9806 | /* Fold an offsetof-like expression. EXPR is a nested sequence of component |
9807 | references with an INDIRECT_REF of a constant at the bottom; much like the | |
9808 | traditional rendering of offsetof as a macro. Return the folded result. */ | |
af28855b | 9809 | |
7549df0d | 9810 | tree |
9811 | fold_offsetof_1 (tree expr) | |
af28855b | 9812 | { |
af28855b | 9813 | tree base, off, t; |
9814 | ||
9815 | switch (TREE_CODE (expr)) | |
9816 | { | |
9817 | case ERROR_MARK: | |
9818 | return expr; | |
9819 | ||
6b11d2e3 | 9820 | case VAR_DECL: |
9821 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
9822 | return error_mark_node; | |
9823 | ||
d897f7c2 | 9824 | case CALL_EXPR: |
cf1a89a3 | 9825 | case TARGET_EXPR: |
d897f7c2 | 9826 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); |
9827 | return error_mark_node; | |
9828 | ||
d897f7c2 | 9829 | case NOP_EXPR: |
9830 | case INDIRECT_REF: | |
7549df0d | 9831 | if (!TREE_CONSTANT (TREE_OPERAND (expr, 0))) |
64ed018c | 9832 | { |
9833 | error ("cannot apply %<offsetof%> to a non constant address"); | |
9834 | return error_mark_node; | |
9835 | } | |
7549df0d | 9836 | return TREE_OPERAND (expr, 0); |
d897f7c2 | 9837 | |
af28855b | 9838 | case COMPONENT_REF: |
7549df0d | 9839 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
af28855b | 9840 | if (base == error_mark_node) |
9841 | return base; | |
9842 | ||
9843 | t = TREE_OPERAND (expr, 1); | |
9844 | if (DECL_C_BIT_FIELD (t)) | |
9845 | { | |
9846 | error ("attempt to take address of bit-field structure " | |
782858b8 | 9847 | "member %qD", t); |
af28855b | 9848 | return error_mark_node; |
9849 | } | |
389dd41b | 9850 | off = size_binop_loc (input_location, PLUS_EXPR, DECL_FIELD_OFFSET (t), |
e913b5cd | 9851 | size_int (tree_to_uhwi (DECL_FIELD_BIT_OFFSET (t)) |
389dd41b | 9852 | / BITS_PER_UNIT)); |
af28855b | 9853 | break; |
9854 | ||
9855 | case ARRAY_REF: | |
7549df0d | 9856 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0)); |
af28855b | 9857 | if (base == error_mark_node) |
9858 | return base; | |
9859 | ||
9860 | t = TREE_OPERAND (expr, 1); | |
64ed018c | 9861 | |
9862 | /* Check if the offset goes beyond the upper bound of the array. */ | |
7549df0d | 9863 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) >= 0) |
e0559d69 | 9864 | { |
9865 | tree upbound = array_ref_up_bound (expr); | |
9866 | if (upbound != NULL_TREE | |
9867 | && TREE_CODE (upbound) == INTEGER_CST | |
9868 | && !tree_int_cst_equal (upbound, | |
9869 | TYPE_MAX_VALUE (TREE_TYPE (upbound)))) | |
9870 | { | |
9871 | upbound = size_binop (PLUS_EXPR, upbound, | |
9872 | build_int_cst (TREE_TYPE (upbound), 1)); | |
9873 | if (tree_int_cst_lt (upbound, t)) | |
9874 | { | |
9875 | tree v; | |
9876 | ||
9877 | for (v = TREE_OPERAND (expr, 0); | |
9878 | TREE_CODE (v) == COMPONENT_REF; | |
9879 | v = TREE_OPERAND (v, 0)) | |
9880 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (v, 0))) | |
9881 | == RECORD_TYPE) | |
9882 | { | |
1767a056 | 9883 | tree fld_chain = DECL_CHAIN (TREE_OPERAND (v, 1)); |
9884 | for (; fld_chain; fld_chain = DECL_CHAIN (fld_chain)) | |
e0559d69 | 9885 | if (TREE_CODE (fld_chain) == FIELD_DECL) |
9886 | break; | |
9887 | ||
9888 | if (fld_chain) | |
9889 | break; | |
9890 | } | |
9891 | /* Don't warn if the array might be considered a poor | |
9892 | man's flexible array member with a very permissive | |
9893 | definition thereof. */ | |
9894 | if (TREE_CODE (v) == ARRAY_REF | |
9895 | || TREE_CODE (v) == COMPONENT_REF) | |
9896 | warning (OPT_Warray_bounds, | |
9897 | "index %E denotes an offset " | |
9898 | "greater than size of %qT", | |
9899 | t, TREE_TYPE (TREE_OPERAND (expr, 0))); | |
9900 | } | |
9901 | } | |
9902 | } | |
7549df0d | 9903 | |
9904 | t = convert (sizetype, t); | |
9905 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
af28855b | 9906 | break; |
9907 | ||
ede90cc2 | 9908 | case COMPOUND_EXPR: |
9909 | /* Handle static members of volatile structs. */ | |
9910 | t = TREE_OPERAND (expr, 1); | |
9911 | gcc_assert (TREE_CODE (t) == VAR_DECL); | |
7549df0d | 9912 | return fold_offsetof_1 (t); |
ede90cc2 | 9913 | |
af28855b | 9914 | default: |
231bd014 | 9915 | gcc_unreachable (); |
af28855b | 9916 | } |
9917 | ||
7549df0d | 9918 | return fold_build_pointer_plus (base, off); |
af28855b | 9919 | } |
9920 | ||
7549df0d | 9921 | /* Likewise, but convert it to the return type of offsetof. */ |
9922 | ||
af28855b | 9923 | tree |
7549df0d | 9924 | fold_offsetof (tree expr) |
af28855b | 9925 | { |
7549df0d | 9926 | return convert (size_type_node, fold_offsetof_1 (expr)); |
af28855b | 9927 | } |
9928 | ||
b9bdfa0b | 9929 | /* Warn for A ?: C expressions (with B omitted) where A is a boolean |
9930 | expression, because B will always be true. */ | |
9931 | ||
9932 | void | |
9933 | warn_for_omitted_condop (location_t location, tree cond) | |
9934 | { | |
9935 | if (truth_value_p (TREE_CODE (cond))) | |
9936 | warning_at (location, OPT_Wparentheses, | |
9937 | "the omitted middle operand in ?: will always be %<true%>, " | |
9938 | "suggest explicit middle operand"); | |
9939 | } | |
9940 | ||
a1f90215 | 9941 | /* Give an error for storing into ARG, which is 'const'. USE indicates |
9942 | how ARG was being used. */ | |
9943 | ||
9944 | void | |
f2697631 | 9945 | readonly_error (location_t loc, tree arg, enum lvalue_use use) |
a1f90215 | 9946 | { |
9947 | gcc_assert (use == lv_assign || use == lv_increment || use == lv_decrement | |
9948 | || use == lv_asm); | |
9949 | /* Using this macro rather than (for example) arrays of messages | |
9950 | ensures that all the format strings are checked at compile | |
9951 | time. */ | |
9952 | #define READONLY_MSG(A, I, D, AS) (use == lv_assign ? (A) \ | |
9953 | : (use == lv_increment ? (I) \ | |
9954 | : (use == lv_decrement ? (D) : (AS)))) | |
9955 | if (TREE_CODE (arg) == COMPONENT_REF) | |
9956 | { | |
9957 | if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0)))) | |
f2697631 | 9958 | error_at (loc, READONLY_MSG (G_("assignment of member " |
9959 | "%qD in read-only object"), | |
9960 | G_("increment of member " | |
9961 | "%qD in read-only object"), | |
9962 | G_("decrement of member " | |
9963 | "%qD in read-only object"), | |
9964 | G_("member %qD in read-only object " | |
9965 | "used as %<asm%> output")), | |
9966 | TREE_OPERAND (arg, 1)); | |
a1f90215 | 9967 | else |
f2697631 | 9968 | error_at (loc, READONLY_MSG (G_("assignment of read-only member %qD"), |
9969 | G_("increment of read-only member %qD"), | |
9970 | G_("decrement of read-only member %qD"), | |
9971 | G_("read-only member %qD used as %<asm%> output")), | |
9972 | TREE_OPERAND (arg, 1)); | |
a1f90215 | 9973 | } |
9974 | else if (TREE_CODE (arg) == VAR_DECL) | |
f2697631 | 9975 | error_at (loc, READONLY_MSG (G_("assignment of read-only variable %qD"), |
9976 | G_("increment of read-only variable %qD"), | |
9977 | G_("decrement of read-only variable %qD"), | |
9978 | G_("read-only variable %qD used as %<asm%> output")), | |
9979 | arg); | |
a1f90215 | 9980 | else if (TREE_CODE (arg) == PARM_DECL) |
f2697631 | 9981 | error_at (loc, READONLY_MSG (G_("assignment of read-only parameter %qD"), |
9982 | G_("increment of read-only parameter %qD"), | |
9983 | G_("decrement of read-only parameter %qD"), | |
9984 | G_("read-only parameter %qD use as %<asm%> output")), | |
9985 | arg); | |
a1f90215 | 9986 | else if (TREE_CODE (arg) == RESULT_DECL) |
9987 | { | |
9988 | gcc_assert (c_dialect_cxx ()); | |
f2697631 | 9989 | error_at (loc, READONLY_MSG (G_("assignment of " |
9990 | "read-only named return value %qD"), | |
9991 | G_("increment of " | |
9992 | "read-only named return value %qD"), | |
9993 | G_("decrement of " | |
9994 | "read-only named return value %qD"), | |
9995 | G_("read-only named return value %qD " | |
9996 | "used as %<asm%>output")), | |
9997 | arg); | |
a1f90215 | 9998 | } |
9999 | else if (TREE_CODE (arg) == FUNCTION_DECL) | |
f2697631 | 10000 | error_at (loc, READONLY_MSG (G_("assignment of function %qD"), |
10001 | G_("increment of function %qD"), | |
10002 | G_("decrement of function %qD"), | |
10003 | G_("function %qD used as %<asm%> output")), | |
10004 | arg); | |
a1f90215 | 10005 | else |
f2697631 | 10006 | error_at (loc, READONLY_MSG (G_("assignment of read-only location %qE"), |
10007 | G_("increment of read-only location %qE"), | |
10008 | G_("decrement of read-only location %qE"), | |
10009 | G_("read-only location %qE used as %<asm%> output")), | |
10010 | arg); | |
a1f90215 | 10011 | } |
10012 | ||
e35976b1 | 10013 | /* Print an error message for an invalid lvalue. USE says |
fdd84b77 | 10014 | how the lvalue is being used and so selects the error message. LOC |
10015 | is the location for the error. */ | |
ab6bb714 | 10016 | |
e35976b1 | 10017 | void |
fdd84b77 | 10018 | lvalue_error (location_t loc, enum lvalue_use use) |
ab6bb714 | 10019 | { |
e35976b1 | 10020 | switch (use) |
ab6bb714 | 10021 | { |
e35976b1 | 10022 | case lv_assign: |
fdd84b77 | 10023 | error_at (loc, "lvalue required as left operand of assignment"); |
e35976b1 | 10024 | break; |
10025 | case lv_increment: | |
fdd84b77 | 10026 | error_at (loc, "lvalue required as increment operand"); |
e35976b1 | 10027 | break; |
10028 | case lv_decrement: | |
fdd84b77 | 10029 | error_at (loc, "lvalue required as decrement operand"); |
e35976b1 | 10030 | break; |
10031 | case lv_addressof: | |
fdd84b77 | 10032 | error_at (loc, "lvalue required as unary %<&%> operand"); |
e35976b1 | 10033 | break; |
10034 | case lv_asm: | |
fdd84b77 | 10035 | error_at (loc, "lvalue required in asm statement"); |
e35976b1 | 10036 | break; |
10037 | default: | |
10038 | gcc_unreachable (); | |
ab6bb714 | 10039 | } |
ab6bb714 | 10040 | } |
b1bbc8e5 | 10041 | |
10042 | /* Print an error message for an invalid indirection of type TYPE. | |
10043 | ERRSTRING is the name of the operator for the indirection. */ | |
10044 | ||
10045 | void | |
10046 | invalid_indirection_error (location_t loc, tree type, ref_operator errstring) | |
10047 | { | |
10048 | switch (errstring) | |
10049 | { | |
10050 | case RO_NULL: | |
10051 | gcc_assert (c_dialect_cxx ()); | |
10052 | error_at (loc, "invalid type argument (have %qT)", type); | |
10053 | break; | |
10054 | case RO_ARRAY_INDEXING: | |
10055 | error_at (loc, | |
10056 | "invalid type argument of array indexing (have %qT)", | |
10057 | type); | |
10058 | break; | |
10059 | case RO_UNARY_STAR: | |
10060 | error_at (loc, | |
10061 | "invalid type argument of unary %<*%> (have %qT)", | |
10062 | type); | |
10063 | break; | |
10064 | case RO_ARROW: | |
10065 | error_at (loc, | |
10066 | "invalid type argument of %<->%> (have %qT)", | |
10067 | type); | |
10068 | break; | |
7354a89b | 10069 | case RO_ARROW_STAR: |
10070 | error_at (loc, | |
10071 | "invalid type argument of %<->*%> (have %qT)", | |
10072 | type); | |
10073 | break; | |
b1bbc8e5 | 10074 | case RO_IMPLICIT_CONVERSION: |
10075 | error_at (loc, | |
10076 | "invalid type argument of implicit conversion (have %qT)", | |
10077 | type); | |
10078 | break; | |
10079 | default: | |
10080 | gcc_unreachable (); | |
10081 | } | |
10082 | } | |
c271bdb2 | 10083 | \f |
10084 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
10085 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
10086 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
10087 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
10088 | ||
10089 | int | |
10090 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
10091 | { | |
10092 | tree maxindex, type, main_type, elt, unqual_elt; | |
10093 | int failure = 0, quals; | |
6753bca0 | 10094 | hashval_t hashcode = 0; |
f5298614 | 10095 | bool overflow_p = false; |
c271bdb2 | 10096 | |
10097 | maxindex = size_zero_node; | |
10098 | if (initial_value) | |
10099 | { | |
10100 | if (TREE_CODE (initial_value) == STRING_CST) | |
10101 | { | |
10102 | int eltsize | |
10103 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
10104 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
10105 | } | |
10106 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
10107 | { | |
f1f41a6c | 10108 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initial_value); |
c271bdb2 | 10109 | |
f1f41a6c | 10110 | if (vec_safe_is_empty (v)) |
c271bdb2 | 10111 | { |
10112 | if (pedantic) | |
10113 | failure = 3; | |
7542c3b4 | 10114 | maxindex = ssize_int (-1); |
c271bdb2 | 10115 | } |
10116 | else | |
10117 | { | |
10118 | tree curindex; | |
c75b4594 | 10119 | unsigned HOST_WIDE_INT cnt; |
10120 | constructor_elt *ce; | |
cee43f7e | 10121 | bool fold_p = false; |
c271bdb2 | 10122 | |
f1f41a6c | 10123 | if ((*v)[0].index) |
f5298614 | 10124 | maxindex = (*v)[0].index, fold_p = true; |
10125 | ||
c271bdb2 | 10126 | curindex = maxindex; |
10127 | ||
f1f41a6c | 10128 | for (cnt = 1; vec_safe_iterate (v, cnt, &ce); cnt++) |
c271bdb2 | 10129 | { |
cee43f7e | 10130 | bool curfold_p = false; |
c75b4594 | 10131 | if (ce->index) |
cee43f7e | 10132 | curindex = ce->index, curfold_p = true; |
c271bdb2 | 10133 | else |
cee43f7e | 10134 | { |
10135 | if (fold_p) | |
f5298614 | 10136 | { |
10137 | /* Since we treat size types now as ordinary | |
10138 | unsigned types, we need an explicit overflow | |
10139 | check. */ | |
10140 | tree orig = curindex; | |
10141 | curindex = fold_convert (sizetype, curindex); | |
10142 | overflow_p |= tree_int_cst_lt (curindex, orig); | |
10143 | } | |
389dd41b | 10144 | curindex = size_binop (PLUS_EXPR, curindex, |
10145 | size_one_node); | |
cee43f7e | 10146 | } |
c271bdb2 | 10147 | if (tree_int_cst_lt (maxindex, curindex)) |
cee43f7e | 10148 | maxindex = curindex, fold_p = curfold_p; |
c271bdb2 | 10149 | } |
f5298614 | 10150 | if (fold_p) |
10151 | { | |
10152 | tree orig = maxindex; | |
10153 | maxindex = fold_convert (sizetype, maxindex); | |
10154 | overflow_p |= tree_int_cst_lt (maxindex, orig); | |
10155 | } | |
c271bdb2 | 10156 | } |
10157 | } | |
10158 | else | |
10159 | { | |
10160 | /* Make an error message unless that happened already. */ | |
10161 | if (initial_value != error_mark_node) | |
10162 | failure = 1; | |
10163 | } | |
10164 | } | |
10165 | else | |
10166 | { | |
10167 | failure = 2; | |
10168 | if (!do_default) | |
10169 | return failure; | |
10170 | } | |
10171 | ||
10172 | type = *ptype; | |
10173 | elt = TREE_TYPE (type); | |
10174 | quals = TYPE_QUALS (strip_array_types (elt)); | |
10175 | if (quals == 0) | |
10176 | unqual_elt = elt; | |
10177 | else | |
6d5d708e | 10178 | unqual_elt = c_build_qualified_type (elt, KEEP_QUAL_ADDR_SPACE (quals)); |
c271bdb2 | 10179 | |
10180 | /* Using build_distinct_type_copy and modifying things afterward instead | |
10181 | of using build_array_type to create a new type preserves all of the | |
10182 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
10183 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
10184 | TREE_TYPE (main_type) = unqual_elt; | |
783bb57e | 10185 | TYPE_DOMAIN (main_type) |
10186 | = build_range_type (TREE_TYPE (maxindex), | |
10187 | build_int_cst (TREE_TYPE (maxindex), 0), maxindex); | |
c271bdb2 | 10188 | layout_type (main_type); |
10189 | ||
6753bca0 | 10190 | /* Make sure we have the canonical MAIN_TYPE. */ |
10191 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
48e1416a | 10192 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), |
6753bca0 | 10193 | hashcode); |
10194 | main_type = type_hash_canon (hashcode, main_type); | |
10195 | ||
796735dc | 10196 | /* Fix the canonical type. */ |
10197 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
10198 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
10199 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
10200 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
10201 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
10202 | != TYPE_DOMAIN (main_type))) | |
48e1416a | 10203 | TYPE_CANONICAL (main_type) |
796735dc | 10204 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), |
10205 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
10206 | else | |
10207 | TYPE_CANONICAL (main_type) = main_type; | |
10208 | ||
c271bdb2 | 10209 | if (quals == 0) |
10210 | type = main_type; | |
10211 | else | |
10212 | type = c_build_qualified_type (main_type, quals); | |
10213 | ||
4f5b8f2a | 10214 | if (COMPLETE_TYPE_P (type) |
10215 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
f5298614 | 10216 | && (overflow_p || TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))) |
4f5b8f2a | 10217 | { |
10218 | error ("size of array is too large"); | |
10219 | /* If we proceed with the array type as it is, we'll eventually | |
08f817b3 | 10220 | crash in tree_to_[su]hwi(). */ |
4f5b8f2a | 10221 | type = error_mark_node; |
10222 | } | |
10223 | ||
c271bdb2 | 10224 | *ptype = type; |
10225 | return failure; | |
10226 | } | |
ab6bb714 | 10227 | |
93426222 | 10228 | /* Like c_mark_addressable but don't check register qualifier. */ |
10229 | void | |
10230 | c_common_mark_addressable_vec (tree t) | |
10231 | { | |
10232 | while (handled_component_p (t)) | |
10233 | t = TREE_OPERAND (t, 0); | |
10234 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
10235 | return; | |
10236 | TREE_ADDRESSABLE (t) = 1; | |
10237 | } | |
10238 | ||
10239 | ||
b6a5fc45 | 10240 | \f |
10241 | /* Used to help initialize the builtin-types.def table. When a type of | |
10242 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
10243 | The later results in segfaults even when a decl using the type doesn't | |
10244 | get invoked. */ | |
10245 | ||
10246 | tree | |
10247 | builtin_type_for_size (int size, bool unsignedp) | |
10248 | { | |
a51edb4c | 10249 | tree type = c_common_type_for_size (size, unsignedp); |
b6a5fc45 | 10250 | return type ? type : error_mark_node; |
10251 | } | |
10252 | ||
10253 | /* A helper function for resolve_overloaded_builtin in resolving the | |
10254 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
10255 | first operand of PARAMS is a pointer to a supported data type. | |
10256 | Returns 0 if an error is encountered. */ | |
10257 | ||
10258 | static int | |
f1f41a6c | 10259 | sync_resolve_size (tree function, vec<tree, va_gc> *params) |
b6a5fc45 | 10260 | { |
10261 | tree type; | |
10262 | int size; | |
10263 | ||
f1f41a6c | 10264 | if (!params) |
b6a5fc45 | 10265 | { |
10266 | error ("too few arguments to function %qE", function); | |
10267 | return 0; | |
10268 | } | |
10269 | ||
f1f41a6c | 10270 | type = TREE_TYPE ((*params)[0]); |
0d284870 | 10271 | if (TREE_CODE (type) == ARRAY_TYPE) |
10272 | { | |
10273 | /* Force array-to-pointer decay for C++. */ | |
10274 | gcc_assert (c_dialect_cxx()); | |
10275 | (*params)[0] = default_conversion ((*params)[0]); | |
10276 | type = TREE_TYPE ((*params)[0]); | |
10277 | } | |
b6a5fc45 | 10278 | if (TREE_CODE (type) != POINTER_TYPE) |
10279 | goto incompatible; | |
10280 | ||
10281 | type = TREE_TYPE (type); | |
10282 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
10283 | goto incompatible; | |
10284 | ||
e913b5cd | 10285 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
27213ba3 | 10286 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
b6a5fc45 | 10287 | return size; |
10288 | ||
10289 | incompatible: | |
10290 | error ("incompatible type for argument %d of %qE", 1, function); | |
10291 | return 0; | |
10292 | } | |
10293 | ||
a0c938f0 | 10294 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
b6a5fc45 | 10295 | PARAMS to make arguments match up with those of FUNCTION. Drops |
10296 | the variadic arguments at the end. Returns false if some error | |
10297 | was encountered; true on success. */ | |
10298 | ||
10299 | static bool | |
1cd6e20d | 10300 | sync_resolve_params (location_t loc, tree orig_function, tree function, |
f1f41a6c | 10301 | vec<tree, va_gc> *params, bool orig_format) |
b6a5fc45 | 10302 | { |
d0af78c5 | 10303 | function_args_iterator iter; |
b6a5fc45 | 10304 | tree ptype; |
b9c74b4d | 10305 | unsigned int parmnum; |
b6a5fc45 | 10306 | |
d0af78c5 | 10307 | function_args_iter_init (&iter, TREE_TYPE (function)); |
b6a5fc45 | 10308 | /* We've declared the implementation functions to use "volatile void *" |
10309 | as the pointer parameter, so we shouldn't get any complaints from the | |
10310 | call to check_function_arguments what ever type the user used. */ | |
d0af78c5 | 10311 | function_args_iter_next (&iter); |
f1f41a6c | 10312 | ptype = TREE_TYPE (TREE_TYPE ((*params)[0])); |
b560fabd | 10313 | ptype = TYPE_MAIN_VARIANT (ptype); |
b6a5fc45 | 10314 | |
10315 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
10316 | don't get warnings for passing pointer types, etc. */ | |
b9c74b4d | 10317 | parmnum = 0; |
d0af78c5 | 10318 | while (1) |
b6a5fc45 | 10319 | { |
d0af78c5 | 10320 | tree val, arg_type; |
10321 | ||
10322 | arg_type = function_args_iter_cond (&iter); | |
10323 | /* XXX void_type_node belies the abstraction. */ | |
10324 | if (arg_type == void_type_node) | |
10325 | break; | |
b6a5fc45 | 10326 | |
b9c74b4d | 10327 | ++parmnum; |
f1f41a6c | 10328 | if (params->length () <= parmnum) |
b6a5fc45 | 10329 | { |
1cd6e20d | 10330 | error_at (loc, "too few arguments to function %qE", orig_function); |
b6a5fc45 | 10331 | return false; |
10332 | } | |
10333 | ||
0f6a7cb7 | 10334 | /* Only convert parameters if arg_type is unsigned integer type with |
10335 | new format sync routines, i.e. don't attempt to convert pointer | |
10336 | arguments (e.g. EXPECTED argument of __atomic_compare_exchange_n), | |
10337 | bool arguments (e.g. WEAK argument) or signed int arguments (memmodel | |
10338 | kinds). */ | |
10339 | if (TREE_CODE (arg_type) == INTEGER_TYPE && TYPE_UNSIGNED (arg_type)) | |
1cd6e20d | 10340 | { |
10341 | /* Ideally for the first conversion we'd use convert_for_assignment | |
10342 | so that we get warnings for anything that doesn't match the pointer | |
10343 | type. This isn't portable across the C and C++ front ends atm. */ | |
f1f41a6c | 10344 | val = (*params)[parmnum]; |
1cd6e20d | 10345 | val = convert (ptype, val); |
10346 | val = convert (arg_type, val); | |
f1f41a6c | 10347 | (*params)[parmnum] = val; |
1cd6e20d | 10348 | } |
b6a5fc45 | 10349 | |
d0af78c5 | 10350 | function_args_iter_next (&iter); |
b6a5fc45 | 10351 | } |
10352 | ||
1cd6e20d | 10353 | /* __atomic routines are not variadic. */ |
f1f41a6c | 10354 | if (!orig_format && params->length () != parmnum + 1) |
1cd6e20d | 10355 | { |
10356 | error_at (loc, "too many arguments to function %qE", orig_function); | |
10357 | return false; | |
10358 | } | |
10359 | ||
b6a5fc45 | 10360 | /* The definition of these primitives is variadic, with the remaining |
10361 | being "an optional list of variables protected by the memory barrier". | |
10362 | No clue what that's supposed to mean, precisely, but we consider all | |
10363 | call-clobbered variables to be protected so we're safe. */ | |
f1f41a6c | 10364 | params->truncate (parmnum + 1); |
b6a5fc45 | 10365 | |
10366 | return true; | |
10367 | } | |
10368 | ||
a0c938f0 | 10369 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
b6a5fc45 | 10370 | RESULT to make it match the type of the first pointer argument in |
10371 | PARAMS. */ | |
10372 | ||
10373 | static tree | |
1cd6e20d | 10374 | sync_resolve_return (tree first_param, tree result, bool orig_format) |
b6a5fc45 | 10375 | { |
b9c74b4d | 10376 | tree ptype = TREE_TYPE (TREE_TYPE (first_param)); |
1cd6e20d | 10377 | tree rtype = TREE_TYPE (result); |
10080eac | 10378 | ptype = TYPE_MAIN_VARIANT (ptype); |
1cd6e20d | 10379 | |
10380 | /* New format doesn't require casting unless the types are the same size. */ | |
10381 | if (orig_format || tree_int_cst_equal (TYPE_SIZE (ptype), TYPE_SIZE (rtype))) | |
10382 | return convert (ptype, result); | |
10383 | else | |
10384 | return result; | |
10385 | } | |
10386 | ||
10387 | /* This function verifies the PARAMS to generic atomic FUNCTION. | |
10388 | It returns the size if all the parameters are the same size, otherwise | |
10389 | 0 is returned if the parameters are invalid. */ | |
10390 | ||
10391 | static int | |
f1f41a6c | 10392 | get_atomic_generic_size (location_t loc, tree function, |
10393 | vec<tree, va_gc> *params) | |
1cd6e20d | 10394 | { |
10395 | unsigned int n_param; | |
10396 | unsigned int n_model; | |
10397 | unsigned int x; | |
10398 | int size_0; | |
10399 | tree type_0; | |
10400 | ||
10401 | /* Determine the parameter makeup. */ | |
10402 | switch (DECL_FUNCTION_CODE (function)) | |
10403 | { | |
10404 | case BUILT_IN_ATOMIC_EXCHANGE: | |
10405 | n_param = 4; | |
10406 | n_model = 1; | |
10407 | break; | |
10408 | case BUILT_IN_ATOMIC_LOAD: | |
10409 | case BUILT_IN_ATOMIC_STORE: | |
10410 | n_param = 3; | |
10411 | n_model = 1; | |
10412 | break; | |
10413 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
10414 | n_param = 6; | |
10415 | n_model = 2; | |
10416 | break; | |
10417 | default: | |
1d581089 | 10418 | gcc_unreachable (); |
1cd6e20d | 10419 | } |
10420 | ||
f1f41a6c | 10421 | if (vec_safe_length (params) != n_param) |
1cd6e20d | 10422 | { |
10423 | error_at (loc, "incorrect number of arguments to function %qE", function); | |
10424 | return 0; | |
10425 | } | |
10426 | ||
10427 | /* Get type of first parameter, and determine its size. */ | |
f1f41a6c | 10428 | type_0 = TREE_TYPE ((*params)[0]); |
0d284870 | 10429 | if (TREE_CODE (type_0) == ARRAY_TYPE) |
10430 | { | |
10431 | /* Force array-to-pointer decay for C++. */ | |
10432 | gcc_assert (c_dialect_cxx()); | |
10433 | (*params)[0] = default_conversion ((*params)[0]); | |
10434 | type_0 = TREE_TYPE ((*params)[0]); | |
10435 | } | |
1d581089 | 10436 | if (TREE_CODE (type_0) != POINTER_TYPE || VOID_TYPE_P (TREE_TYPE (type_0))) |
10437 | { | |
10438 | error_at (loc, "argument 1 of %qE must be a non-void pointer type", | |
10439 | function); | |
10440 | return 0; | |
10441 | } | |
10442 | ||
10443 | /* Types must be compile time constant sizes. */ | |
10444 | if (TREE_CODE ((TYPE_SIZE_UNIT (TREE_TYPE (type_0)))) != INTEGER_CST) | |
1cd6e20d | 10445 | { |
1d581089 | 10446 | error_at (loc, |
10447 | "argument 1 of %qE must be a pointer to a constant size type", | |
10448 | function); | |
1cd6e20d | 10449 | return 0; |
10450 | } | |
1d581089 | 10451 | |
e913b5cd | 10452 | size_0 = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type_0))); |
1cd6e20d | 10453 | |
1d581089 | 10454 | /* Zero size objects are not allowed. */ |
10455 | if (size_0 == 0) | |
10456 | { | |
10457 | error_at (loc, | |
10458 | "argument 1 of %qE must be a pointer to a nonzero size object", | |
10459 | function); | |
10460 | return 0; | |
10461 | } | |
10462 | ||
1cd6e20d | 10463 | /* Check each other parameter is a pointer and the same size. */ |
10464 | for (x = 0; x < n_param - n_model; x++) | |
10465 | { | |
10466 | int size; | |
f1f41a6c | 10467 | tree type = TREE_TYPE ((*params)[x]); |
a04e8d62 | 10468 | /* __atomic_compare_exchange has a bool in the 4th position, skip it. */ |
1cd6e20d | 10469 | if (n_param == 6 && x == 3) |
10470 | continue; | |
10471 | if (!POINTER_TYPE_P (type)) | |
10472 | { | |
10473 | error_at (loc, "argument %d of %qE must be a pointer type", x + 1, | |
10474 | function); | |
10475 | return 0; | |
10476 | } | |
1f6be080 | 10477 | tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
10478 | size = type_size ? tree_to_uhwi (type_size) : 0; | |
1cd6e20d | 10479 | if (size != size_0) |
10480 | { | |
10481 | error_at (loc, "size mismatch in argument %d of %qE", x + 1, | |
10482 | function); | |
10483 | return 0; | |
10484 | } | |
10485 | } | |
10486 | ||
10487 | /* Check memory model parameters for validity. */ | |
10488 | for (x = n_param - n_model ; x < n_param; x++) | |
10489 | { | |
f1f41a6c | 10490 | tree p = (*params)[x]; |
1cd6e20d | 10491 | if (TREE_CODE (p) == INTEGER_CST) |
10492 | { | |
e913b5cd | 10493 | int i = tree_to_uhwi (p); |
72d65da9 | 10494 | if (i < 0 || (i & MEMMODEL_MASK) >= MEMMODEL_LAST) |
1cd6e20d | 10495 | { |
10496 | warning_at (loc, OPT_Winvalid_memory_model, | |
10497 | "invalid memory model argument %d of %qE", x + 1, | |
10498 | function); | |
1cd6e20d | 10499 | } |
10500 | } | |
10501 | else | |
10502 | if (!INTEGRAL_TYPE_P (TREE_TYPE (p))) | |
10503 | { | |
10504 | error_at (loc, "non-integer memory model argument %d of %qE", x + 1, | |
10505 | function); | |
10506 | return 0; | |
10507 | } | |
10508 | } | |
10509 | ||
10510 | return size_0; | |
10511 | } | |
10512 | ||
10513 | ||
10514 | /* This will take an __atomic_ generic FUNCTION call, and add a size parameter N | |
10515 | at the beginning of the parameter list PARAMS representing the size of the | |
10516 | objects. This is to match the library ABI requirement. LOC is the location | |
10517 | of the function call. | |
10518 | The new function is returned if it needed rebuilding, otherwise NULL_TREE is | |
10519 | returned to allow the external call to be constructed. */ | |
10520 | ||
10521 | static tree | |
10522 | add_atomic_size_parameter (unsigned n, location_t loc, tree function, | |
f1f41a6c | 10523 | vec<tree, va_gc> *params) |
1cd6e20d | 10524 | { |
10525 | tree size_node; | |
10526 | ||
10527 | /* Insert a SIZE_T parameter as the first param. If there isn't | |
10528 | enough space, allocate a new vector and recursively re-build with that. */ | |
f1f41a6c | 10529 | if (!params->space (1)) |
1cd6e20d | 10530 | { |
10531 | unsigned int z, len; | |
f1f41a6c | 10532 | vec<tree, va_gc> *v; |
1cd6e20d | 10533 | tree f; |
10534 | ||
f1f41a6c | 10535 | len = params->length (); |
10536 | vec_alloc (v, len + 1); | |
5a672e62 | 10537 | v->quick_push (build_int_cst (size_type_node, n)); |
1cd6e20d | 10538 | for (z = 0; z < len; z++) |
f1f41a6c | 10539 | v->quick_push ((*params)[z]); |
ec761d5a | 10540 | f = build_function_call_vec (loc, vNULL, function, v, NULL); |
f1f41a6c | 10541 | vec_free (v); |
1cd6e20d | 10542 | return f; |
10543 | } | |
10544 | ||
10545 | /* Add the size parameter and leave as a function call for processing. */ | |
10546 | size_node = build_int_cst (size_type_node, n); | |
f1f41a6c | 10547 | params->quick_insert (0, size_node); |
1cd6e20d | 10548 | return NULL_TREE; |
10549 | } | |
10550 | ||
10551 | ||
a056826c | 10552 | /* Return whether atomic operations for naturally aligned N-byte |
10553 | arguments are supported, whether inline or through libatomic. */ | |
10554 | static bool | |
10555 | atomic_size_supported_p (int n) | |
10556 | { | |
10557 | switch (n) | |
10558 | { | |
10559 | case 1: | |
10560 | case 2: | |
10561 | case 4: | |
10562 | case 8: | |
10563 | return true; | |
10564 | ||
10565 | case 16: | |
10566 | return targetm.scalar_mode_supported_p (TImode); | |
10567 | ||
10568 | default: | |
10569 | return false; | |
10570 | } | |
10571 | } | |
10572 | ||
1cd6e20d | 10573 | /* This will process an __atomic_exchange function call, determine whether it |
10574 | needs to be mapped to the _N variation, or turned into a library call. | |
10575 | LOC is the location of the builtin call. | |
10576 | FUNCTION is the DECL that has been invoked; | |
10577 | PARAMS is the argument list for the call. The return value is non-null | |
10578 | TRUE is returned if it is translated into the proper format for a call to the | |
10579 | external library, and NEW_RETURN is set the tree for that function. | |
10580 | FALSE is returned if processing for the _N variation is required, and | |
10581 | NEW_RETURN is set to the the return value the result is copied into. */ | |
10582 | static bool | |
10583 | resolve_overloaded_atomic_exchange (location_t loc, tree function, | |
f1f41a6c | 10584 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 10585 | { |
10586 | tree p0, p1, p2, p3; | |
10587 | tree I_type, I_type_ptr; | |
10588 | int n = get_atomic_generic_size (loc, function, params); | |
10589 | ||
1d581089 | 10590 | /* Size of 0 is an error condition. */ |
10591 | if (n == 0) | |
10592 | { | |
10593 | *new_return = error_mark_node; | |
10594 | return true; | |
10595 | } | |
10596 | ||
1cd6e20d | 10597 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 10598 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 10599 | { |
10600 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
10601 | return true; | |
10602 | } | |
10603 | ||
10604 | /* Otherwise there is a lockfree match, transform the call from: | |
10605 | void fn(T* mem, T* desired, T* return, model) | |
10606 | into | |
10607 | *return = (T) (fn (In* mem, (In) *desired, model)) */ | |
10608 | ||
f1f41a6c | 10609 | p0 = (*params)[0]; |
10610 | p1 = (*params)[1]; | |
10611 | p2 = (*params)[2]; | |
10612 | p3 = (*params)[3]; | |
1cd6e20d | 10613 | |
10614 | /* Create pointer to appropriate size. */ | |
10615 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
10616 | I_type_ptr = build_pointer_type (I_type); | |
10617 | ||
10618 | /* Convert object pointer to required type. */ | |
10619 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 10620 | (*params)[0] = p0; |
1cd6e20d | 10621 | /* Convert new value to required type, and dereference it. */ |
10622 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
10623 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 10624 | (*params)[1] = p1; |
1cd6e20d | 10625 | |
10626 | /* Move memory model to the 3rd position, and end param list. */ | |
f1f41a6c | 10627 | (*params)[2] = p3; |
10628 | params->truncate (3); | |
1cd6e20d | 10629 | |
10630 | /* Convert return pointer and dereference it for later assignment. */ | |
10631 | *new_return = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
10632 | ||
10633 | return false; | |
b6a5fc45 | 10634 | } |
10635 | ||
1cd6e20d | 10636 | |
10637 | /* This will process an __atomic_compare_exchange function call, determine | |
10638 | whether it needs to be mapped to the _N variation, or turned into a lib call. | |
10639 | LOC is the location of the builtin call. | |
10640 | FUNCTION is the DECL that has been invoked; | |
10641 | PARAMS is the argument list for the call. The return value is non-null | |
10642 | TRUE is returned if it is translated into the proper format for a call to the | |
10643 | external library, and NEW_RETURN is set the tree for that function. | |
10644 | FALSE is returned if processing for the _N variation is required. */ | |
10645 | ||
10646 | static bool | |
10647 | resolve_overloaded_atomic_compare_exchange (location_t loc, tree function, | |
f1f41a6c | 10648 | vec<tree, va_gc> *params, |
1cd6e20d | 10649 | tree *new_return) |
10650 | { | |
10651 | tree p0, p1, p2; | |
10652 | tree I_type, I_type_ptr; | |
10653 | int n = get_atomic_generic_size (loc, function, params); | |
10654 | ||
1d581089 | 10655 | /* Size of 0 is an error condition. */ |
10656 | if (n == 0) | |
10657 | { | |
10658 | *new_return = error_mark_node; | |
10659 | return true; | |
10660 | } | |
10661 | ||
1cd6e20d | 10662 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 10663 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 10664 | { |
10665 | /* The library generic format does not have the weak parameter, so | |
10666 | remove it from the param list. Since a parameter has been removed, | |
10667 | we can be sure that there is room for the SIZE_T parameter, meaning | |
10668 | there will not be a recursive rebuilding of the parameter list, so | |
10669 | there is no danger this will be done twice. */ | |
10670 | if (n > 0) | |
10671 | { | |
f1f41a6c | 10672 | (*params)[3] = (*params)[4]; |
10673 | (*params)[4] = (*params)[5]; | |
10674 | params->truncate (5); | |
1cd6e20d | 10675 | } |
10676 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
10677 | return true; | |
10678 | } | |
10679 | ||
10680 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
10681 | bool fn(T* mem, T* desired, T* return, weak, success, failure) | |
10682 | into | |
10683 | bool fn ((In *)mem, (In *)expected, (In) *desired, weak, succ, fail) */ | |
ab2c1de8 | 10684 | |
f1f41a6c | 10685 | p0 = (*params)[0]; |
10686 | p1 = (*params)[1]; | |
10687 | p2 = (*params)[2]; | |
1cd6e20d | 10688 | |
10689 | /* Create pointer to appropriate size. */ | |
10690 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
10691 | I_type_ptr = build_pointer_type (I_type); | |
10692 | ||
10693 | /* Convert object pointer to required type. */ | |
10694 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 10695 | (*params)[0] = p0; |
1cd6e20d | 10696 | |
10697 | /* Convert expected pointer to required type. */ | |
10698 | p1 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p1); | |
f1f41a6c | 10699 | (*params)[1] = p1; |
1cd6e20d | 10700 | |
10701 | /* Convert desired value to required type, and dereference it. */ | |
10702 | p2 = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
10703 | p2 = build1 (VIEW_CONVERT_EXPR, I_type, p2); | |
f1f41a6c | 10704 | (*params)[2] = p2; |
1cd6e20d | 10705 | |
10706 | /* The rest of the parameters are fine. NULL means no special return value | |
10707 | processing.*/ | |
10708 | *new_return = NULL; | |
10709 | return false; | |
10710 | } | |
10711 | ||
10712 | ||
10713 | /* This will process an __atomic_load function call, determine whether it | |
10714 | needs to be mapped to the _N variation, or turned into a library call. | |
10715 | LOC is the location of the builtin call. | |
10716 | FUNCTION is the DECL that has been invoked; | |
10717 | PARAMS is the argument list for the call. The return value is non-null | |
10718 | TRUE is returned if it is translated into the proper format for a call to the | |
10719 | external library, and NEW_RETURN is set the tree for that function. | |
10720 | FALSE is returned if processing for the _N variation is required, and | |
10721 | NEW_RETURN is set to the the return value the result is copied into. */ | |
10722 | ||
10723 | static bool | |
10724 | resolve_overloaded_atomic_load (location_t loc, tree function, | |
f1f41a6c | 10725 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 10726 | { |
10727 | tree p0, p1, p2; | |
10728 | tree I_type, I_type_ptr; | |
10729 | int n = get_atomic_generic_size (loc, function, params); | |
10730 | ||
1d581089 | 10731 | /* Size of 0 is an error condition. */ |
10732 | if (n == 0) | |
10733 | { | |
10734 | *new_return = error_mark_node; | |
10735 | return true; | |
10736 | } | |
10737 | ||
1cd6e20d | 10738 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 10739 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 10740 | { |
10741 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
10742 | return true; | |
10743 | } | |
10744 | ||
10745 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
10746 | void fn(T* mem, T* return, model) | |
10747 | into | |
10748 | *return = (T) (fn ((In *) mem, model)) */ | |
10749 | ||
f1f41a6c | 10750 | p0 = (*params)[0]; |
10751 | p1 = (*params)[1]; | |
10752 | p2 = (*params)[2]; | |
1cd6e20d | 10753 | |
10754 | /* Create pointer to appropriate size. */ | |
10755 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
10756 | I_type_ptr = build_pointer_type (I_type); | |
10757 | ||
10758 | /* Convert object pointer to required type. */ | |
10759 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 10760 | (*params)[0] = p0; |
1cd6e20d | 10761 | |
10762 | /* Move memory model to the 2nd position, and end param list. */ | |
f1f41a6c | 10763 | (*params)[1] = p2; |
10764 | params->truncate (2); | |
1cd6e20d | 10765 | |
10766 | /* Convert return pointer and dereference it for later assignment. */ | |
10767 | *new_return = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
10768 | ||
10769 | return false; | |
10770 | } | |
10771 | ||
10772 | ||
10773 | /* This will process an __atomic_store function call, determine whether it | |
10774 | needs to be mapped to the _N variation, or turned into a library call. | |
10775 | LOC is the location of the builtin call. | |
10776 | FUNCTION is the DECL that has been invoked; | |
10777 | PARAMS is the argument list for the call. The return value is non-null | |
10778 | TRUE is returned if it is translated into the proper format for a call to the | |
10779 | external library, and NEW_RETURN is set the tree for that function. | |
10780 | FALSE is returned if processing for the _N variation is required, and | |
10781 | NEW_RETURN is set to the the return value the result is copied into. */ | |
10782 | ||
10783 | static bool | |
10784 | resolve_overloaded_atomic_store (location_t loc, tree function, | |
f1f41a6c | 10785 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 10786 | { |
10787 | tree p0, p1; | |
10788 | tree I_type, I_type_ptr; | |
10789 | int n = get_atomic_generic_size (loc, function, params); | |
10790 | ||
1d581089 | 10791 | /* Size of 0 is an error condition. */ |
10792 | if (n == 0) | |
10793 | { | |
10794 | *new_return = error_mark_node; | |
10795 | return true; | |
10796 | } | |
10797 | ||
1cd6e20d | 10798 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 10799 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 10800 | { |
10801 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
10802 | return true; | |
10803 | } | |
10804 | ||
10805 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
10806 | void fn(T* mem, T* value, model) | |
10807 | into | |
10808 | fn ((In *) mem, (In) *value, model) */ | |
10809 | ||
f1f41a6c | 10810 | p0 = (*params)[0]; |
10811 | p1 = (*params)[1]; | |
1cd6e20d | 10812 | |
10813 | /* Create pointer to appropriate size. */ | |
10814 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
10815 | I_type_ptr = build_pointer_type (I_type); | |
10816 | ||
10817 | /* Convert object pointer to required type. */ | |
10818 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 10819 | (*params)[0] = p0; |
1cd6e20d | 10820 | |
10821 | /* Convert new value to required type, and dereference it. */ | |
10822 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
10823 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 10824 | (*params)[1] = p1; |
1cd6e20d | 10825 | |
10826 | /* The memory model is in the right spot already. Return is void. */ | |
10827 | *new_return = NULL_TREE; | |
10828 | ||
10829 | return false; | |
10830 | } | |
10831 | ||
10832 | ||
b6a5fc45 | 10833 | /* Some builtin functions are placeholders for other expressions. This |
10834 | function should be called immediately after parsing the call expression | |
10835 | before surrounding code has committed to the type of the expression. | |
10836 | ||
e60a6f7b | 10837 | LOC is the location of the builtin call. |
10838 | ||
b6a5fc45 | 10839 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. |
10840 | PARAMS is the argument list for the call. The return value is non-null | |
10841 | when expansion is complete, and null if normal processing should | |
10842 | continue. */ | |
10843 | ||
10844 | tree | |
f1f41a6c | 10845 | resolve_overloaded_builtin (location_t loc, tree function, |
10846 | vec<tree, va_gc> *params) | |
b6a5fc45 | 10847 | { |
10848 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
1cd6e20d | 10849 | bool orig_format = true; |
10850 | tree new_return = NULL_TREE; | |
10851 | ||
65441f6f | 10852 | switch (DECL_BUILT_IN_CLASS (function)) |
10853 | { | |
10854 | case BUILT_IN_NORMAL: | |
10855 | break; | |
10856 | case BUILT_IN_MD: | |
10857 | if (targetm.resolve_overloaded_builtin) | |
e60a6f7b | 10858 | return targetm.resolve_overloaded_builtin (loc, function, params); |
65441f6f | 10859 | else |
a0c938f0 | 10860 | return NULL_TREE; |
65441f6f | 10861 | default: |
10862 | return NULL_TREE; | |
10863 | } | |
a0c938f0 | 10864 | |
65441f6f | 10865 | /* Handle BUILT_IN_NORMAL here. */ |
b6a5fc45 | 10866 | switch (orig_code) |
10867 | { | |
1cd6e20d | 10868 | case BUILT_IN_ATOMIC_EXCHANGE: |
10869 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
10870 | case BUILT_IN_ATOMIC_LOAD: | |
10871 | case BUILT_IN_ATOMIC_STORE: | |
10872 | { | |
10873 | /* Handle these 4 together so that they can fall through to the next | |
10874 | case if the call is transformed to an _N variant. */ | |
10875 | switch (orig_code) | |
10876 | { | |
10877 | case BUILT_IN_ATOMIC_EXCHANGE: | |
10878 | { | |
10879 | if (resolve_overloaded_atomic_exchange (loc, function, params, | |
10880 | &new_return)) | |
10881 | return new_return; | |
10882 | /* Change to the _N variant. */ | |
10883 | orig_code = BUILT_IN_ATOMIC_EXCHANGE_N; | |
10884 | break; | |
10885 | } | |
10886 | ||
10887 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
10888 | { | |
10889 | if (resolve_overloaded_atomic_compare_exchange (loc, function, | |
10890 | params, | |
10891 | &new_return)) | |
10892 | return new_return; | |
10893 | /* Change to the _N variant. */ | |
10894 | orig_code = BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N; | |
10895 | break; | |
10896 | } | |
10897 | case BUILT_IN_ATOMIC_LOAD: | |
10898 | { | |
10899 | if (resolve_overloaded_atomic_load (loc, function, params, | |
10900 | &new_return)) | |
10901 | return new_return; | |
10902 | /* Change to the _N variant. */ | |
10903 | orig_code = BUILT_IN_ATOMIC_LOAD_N; | |
10904 | break; | |
10905 | } | |
10906 | case BUILT_IN_ATOMIC_STORE: | |
10907 | { | |
10908 | if (resolve_overloaded_atomic_store (loc, function, params, | |
10909 | &new_return)) | |
10910 | return new_return; | |
10911 | /* Change to the _N variant. */ | |
10912 | orig_code = BUILT_IN_ATOMIC_STORE_N; | |
10913 | break; | |
10914 | } | |
10915 | default: | |
10916 | gcc_unreachable (); | |
10917 | } | |
10918 | /* Fallthrough to the normal processing. */ | |
10919 | } | |
10920 | case BUILT_IN_ATOMIC_EXCHANGE_N: | |
10921 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N: | |
10922 | case BUILT_IN_ATOMIC_LOAD_N: | |
10923 | case BUILT_IN_ATOMIC_STORE_N: | |
10924 | case BUILT_IN_ATOMIC_ADD_FETCH_N: | |
10925 | case BUILT_IN_ATOMIC_SUB_FETCH_N: | |
10926 | case BUILT_IN_ATOMIC_AND_FETCH_N: | |
10927 | case BUILT_IN_ATOMIC_NAND_FETCH_N: | |
10928 | case BUILT_IN_ATOMIC_XOR_FETCH_N: | |
10929 | case BUILT_IN_ATOMIC_OR_FETCH_N: | |
10930 | case BUILT_IN_ATOMIC_FETCH_ADD_N: | |
10931 | case BUILT_IN_ATOMIC_FETCH_SUB_N: | |
10932 | case BUILT_IN_ATOMIC_FETCH_AND_N: | |
10933 | case BUILT_IN_ATOMIC_FETCH_NAND_N: | |
10934 | case BUILT_IN_ATOMIC_FETCH_XOR_N: | |
10935 | case BUILT_IN_ATOMIC_FETCH_OR_N: | |
10936 | { | |
10937 | orig_format = false; | |
10938 | /* Fallthru for parameter processing. */ | |
10939 | } | |
2797f13a | 10940 | case BUILT_IN_SYNC_FETCH_AND_ADD_N: |
10941 | case BUILT_IN_SYNC_FETCH_AND_SUB_N: | |
10942 | case BUILT_IN_SYNC_FETCH_AND_OR_N: | |
10943 | case BUILT_IN_SYNC_FETCH_AND_AND_N: | |
10944 | case BUILT_IN_SYNC_FETCH_AND_XOR_N: | |
10945 | case BUILT_IN_SYNC_FETCH_AND_NAND_N: | |
10946 | case BUILT_IN_SYNC_ADD_AND_FETCH_N: | |
10947 | case BUILT_IN_SYNC_SUB_AND_FETCH_N: | |
10948 | case BUILT_IN_SYNC_OR_AND_FETCH_N: | |
10949 | case BUILT_IN_SYNC_AND_AND_FETCH_N: | |
10950 | case BUILT_IN_SYNC_XOR_AND_FETCH_N: | |
10951 | case BUILT_IN_SYNC_NAND_AND_FETCH_N: | |
10952 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N: | |
10953 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N: | |
10954 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_N: | |
10955 | case BUILT_IN_SYNC_LOCK_RELEASE_N: | |
b6a5fc45 | 10956 | { |
10957 | int n = sync_resolve_size (function, params); | |
b9c74b4d | 10958 | tree new_function, first_param, result; |
b9a16870 | 10959 | enum built_in_function fncode; |
b6a5fc45 | 10960 | |
10961 | if (n == 0) | |
10962 | return error_mark_node; | |
10963 | ||
b9a16870 | 10964 | fncode = (enum built_in_function)((int)orig_code + exact_log2 (n) + 1); |
10965 | new_function = builtin_decl_explicit (fncode); | |
1cd6e20d | 10966 | if (!sync_resolve_params (loc, function, new_function, params, |
10967 | orig_format)) | |
b6a5fc45 | 10968 | return error_mark_node; |
10969 | ||
f1f41a6c | 10970 | first_param = (*params)[0]; |
ec761d5a | 10971 | result = build_function_call_vec (loc, vNULL, new_function, params, |
10972 | NULL); | |
1cd6e20d | 10973 | if (result == error_mark_node) |
10974 | return result; | |
2797f13a | 10975 | if (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N |
1cd6e20d | 10976 | && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N |
10977 | && orig_code != BUILT_IN_ATOMIC_STORE_N) | |
10978 | result = sync_resolve_return (first_param, result, orig_format); | |
b6a5fc45 | 10979 | |
1cd6e20d | 10980 | /* If new_return is set, assign function to that expr and cast the |
10981 | result to void since the generic interface returned void. */ | |
10982 | if (new_return) | |
10983 | { | |
10984 | /* Cast function result from I{1,2,4,8,16} to the required type. */ | |
10985 | result = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (new_return), result); | |
10986 | result = build2 (MODIFY_EXPR, TREE_TYPE (new_return), new_return, | |
10987 | result); | |
10988 | TREE_SIDE_EFFECTS (result) = 1; | |
10989 | protected_set_expr_location (result, loc); | |
10990 | result = convert (void_type_node, result); | |
10991 | } | |
b6a5fc45 | 10992 | return result; |
10993 | } | |
10994 | ||
10995 | default: | |
65441f6f | 10996 | return NULL_TREE; |
b6a5fc45 | 10997 | } |
10998 | } | |
10999 | ||
73437615 | 11000 | /* vector_types_compatible_elements_p is used in type checks of vectors |
11001 | values used as operands of binary operators. Where it returns true, and | |
11002 | the other checks of the caller succeed (being vector types in he first | |
11003 | place, and matching number of elements), we can just treat the types | |
11004 | as essentially the same. | |
11005 | Contrast with vector_targets_convertible_p, which is used for vector | |
11006 | pointer types, and vector_types_convertible_p, which will allow | |
11007 | language-specific matches under the control of flag_lax_vector_conversions, | |
11008 | and might still require a conversion. */ | |
11009 | /* True if vector types T1 and T2 can be inputs to the same binary | |
11010 | operator without conversion. | |
11011 | We don't check the overall vector size here because some of our callers | |
11012 | want to give different error messages when the vectors are compatible | |
11013 | except for the element count. */ | |
11014 | ||
491255f5 | 11015 | bool |
73437615 | 11016 | vector_types_compatible_elements_p (tree t1, tree t2) |
491255f5 | 11017 | { |
73437615 | 11018 | bool opaque = TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2); |
11019 | t1 = TREE_TYPE (t1); | |
11020 | t2 = TREE_TYPE (t2); | |
11021 | ||
491255f5 | 11022 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); |
11023 | ||
9421ebb9 | 11024 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
11025 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
11026 | || c2 == FIXED_POINT_TYPE)); | |
491255f5 | 11027 | |
73437615 | 11028 | t1 = c_common_signed_type (t1); |
11029 | t2 = c_common_signed_type (t2); | |
491255f5 | 11030 | /* Equality works here because c_common_signed_type uses |
11031 | TYPE_MAIN_VARIANT. */ | |
73437615 | 11032 | if (t1 == t2) |
11033 | return true; | |
11034 | if (opaque && c1 == c2 | |
11035 | && (c1 == INTEGER_TYPE || c1 == REAL_TYPE) | |
11036 | && TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
11037 | return true; | |
11038 | return false; | |
491255f5 | 11039 | } |
11040 | ||
be7350e7 | 11041 | /* Check for missing format attributes on function pointers. LTYPE is |
11042 | the new type or left-hand side type. RTYPE is the old type or | |
11043 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
11044 | attribute. */ | |
11045 | ||
11046 | bool | |
11047 | check_missing_format_attribute (tree ltype, tree rtype) | |
11048 | { | |
11049 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
11050 | tree ra; | |
11051 | ||
11052 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
11053 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
11054 | break; | |
11055 | if (ra) | |
11056 | { | |
11057 | tree la; | |
11058 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
11059 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
11060 | break; | |
11061 | return !la; | |
11062 | } | |
11063 | else | |
11064 | return false; | |
11065 | } | |
11066 | ||
2840aae4 | 11067 | /* Subscripting with type char is likely to lose on a machine where |
11068 | chars are signed. So warn on any machine, but optionally. Don't | |
11069 | warn for unsigned char since that type is safe. Don't warn for | |
11070 | signed char because anyone who uses that must have done so | |
11071 | deliberately. Furthermore, we reduce the false positive load by | |
11072 | warning only for non-constant value of type char. */ | |
11073 | ||
11074 | void | |
11075 | warn_array_subscript_with_type_char (tree index) | |
11076 | { | |
11077 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
11078 | && TREE_CODE (index) != INTEGER_CST) | |
11079 | warning (OPT_Wchar_subscripts, "array subscript has type %<char%>"); | |
11080 | } | |
11081 | ||
e534436e | 11082 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
11083 | cover cases like x + y << z which readers are likely to | |
11084 | misinterpret. We have seen an expression in which CODE is a binary | |
82012ffe | 11085 | operator used to combine expressions ARG_LEFT and ARG_RIGHT, which |
11086 | before folding had CODE_LEFT and CODE_RIGHT. CODE_LEFT and | |
11087 | CODE_RIGHT may be ERROR_MARK, which means that that side of the | |
11088 | expression was not formed using a binary or unary operator, or it | |
11089 | was enclosed in parentheses. */ | |
e534436e | 11090 | |
11091 | void | |
b0e7825e | 11092 | warn_about_parentheses (location_t loc, enum tree_code code, |
269f7979 | 11093 | enum tree_code code_left, tree arg_left, |
82012ffe | 11094 | enum tree_code code_right, tree arg_right) |
e534436e | 11095 | { |
11096 | if (!warn_parentheses) | |
11097 | return; | |
11098 | ||
82012ffe | 11099 | /* This macro tests that the expression ARG with original tree code |
11100 | CODE appears to be a boolean expression. or the result of folding a | |
11101 | boolean expression. */ | |
11102 | #define APPEARS_TO_BE_BOOLEAN_EXPR_P(CODE, ARG) \ | |
11103 | (truth_value_p (TREE_CODE (ARG)) \ | |
11104 | || TREE_CODE (TREE_TYPE (ARG)) == BOOLEAN_TYPE \ | |
11105 | /* Folding may create 0 or 1 integers from other expressions. */ \ | |
11106 | || ((CODE) != INTEGER_CST \ | |
11107 | && (integer_onep (ARG) || integer_zerop (ARG)))) | |
11108 | ||
48e1416a | 11109 | switch (code) |
e534436e | 11110 | { |
82012ffe | 11111 | case LSHIFT_EXPR: |
b0e7825e | 11112 | if (code_left == PLUS_EXPR) |
11113 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11114 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11115 | else if (code_right == PLUS_EXPR) | |
11116 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11117 | "suggest parentheses around %<+%> inside %<<<%>"); | |
11118 | else if (code_left == MINUS_EXPR) | |
11119 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11120 | "suggest parentheses around %<-%> inside %<<<%>"); | |
11121 | else if (code_right == MINUS_EXPR) | |
11122 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11123 | "suggest parentheses around %<-%> inside %<<<%>"); | |
82012ffe | 11124 | return; |
e534436e | 11125 | |
82012ffe | 11126 | case RSHIFT_EXPR: |
b0e7825e | 11127 | if (code_left == PLUS_EXPR) |
11128 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11129 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11130 | else if (code_right == PLUS_EXPR) | |
11131 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11132 | "suggest parentheses around %<+%> inside %<>>%>"); | |
11133 | else if (code_left == MINUS_EXPR) | |
11134 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11135 | "suggest parentheses around %<-%> inside %<>>%>"); | |
11136 | else if (code_right == MINUS_EXPR) | |
11137 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11138 | "suggest parentheses around %<-%> inside %<>>%>"); | |
82012ffe | 11139 | return; |
e534436e | 11140 | |
82012ffe | 11141 | case TRUTH_ORIF_EXPR: |
b0e7825e | 11142 | if (code_left == TRUTH_ANDIF_EXPR) |
11143 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11144 | "suggest parentheses around %<&&%> within %<||%>"); | |
11145 | else if (code_right == TRUTH_ANDIF_EXPR) | |
11146 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11147 | "suggest parentheses around %<&&%> within %<||%>"); | |
82012ffe | 11148 | return; |
11149 | ||
11150 | case BIT_IOR_EXPR: | |
e534436e | 11151 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR |
b0e7825e | 11152 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11153 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11154 | "suggest parentheses around arithmetic in operand of %<|%>"); | |
11155 | else if (code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
11156 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11157 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11158 | "suggest parentheses around arithmetic in operand of %<|%>"); |
e534436e | 11159 | /* Check cases like x|y==z */ |
b0e7825e | 11160 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11161 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11162 | "suggest parentheses around comparison in operand of %<|%>"); | |
11163 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11164 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11165 | "suggest parentheses around comparison in operand of %<|%>"); |
11166 | /* Check cases like !x | y */ | |
11167 | else if (code_left == TRUTH_NOT_EXPR | |
11168 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
b0e7825e | 11169 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11170 | "suggest parentheses around operand of " | |
11171 | "%<!%> or change %<|%> to %<||%> or %<!%> to %<~%>"); | |
82012ffe | 11172 | return; |
e534436e | 11173 | |
82012ffe | 11174 | case BIT_XOR_EXPR: |
e534436e | 11175 | if (code_left == BIT_AND_EXPR |
b0e7825e | 11176 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR) |
11177 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11178 | "suggest parentheses around arithmetic in operand of %<^%>"); | |
11179 | else if (code_right == BIT_AND_EXPR | |
11180 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
11181 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11182 | "suggest parentheses around arithmetic in operand of %<^%>"); |
e534436e | 11183 | /* Check cases like x^y==z */ |
b0e7825e | 11184 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11185 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11186 | "suggest parentheses around comparison in operand of %<^%>"); | |
11187 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11188 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11189 | "suggest parentheses around comparison in operand of %<^%>"); |
11190 | return; | |
e534436e | 11191 | |
82012ffe | 11192 | case BIT_AND_EXPR: |
b0e7825e | 11193 | if (code_left == PLUS_EXPR) |
11194 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11195 | "suggest parentheses around %<+%> in operand of %<&%>"); | |
11196 | else if (code_right == PLUS_EXPR) | |
11197 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11198 | "suggest parentheses around %<+%> in operand of %<&%>"); |
b0e7825e | 11199 | else if (code_left == MINUS_EXPR) |
11200 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11201 | "suggest parentheses around %<-%> in operand of %<&%>"); | |
11202 | else if (code_right == MINUS_EXPR) | |
11203 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11204 | "suggest parentheses around %<-%> in operand of %<&%>"); |
e534436e | 11205 | /* Check cases like x&y==z */ |
b0e7825e | 11206 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11207 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11208 | "suggest parentheses around comparison in operand of %<&%>"); | |
11209 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11210 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11211 | "suggest parentheses around comparison in operand of %<&%>"); |
11212 | /* Check cases like !x & y */ | |
11213 | else if (code_left == TRUTH_NOT_EXPR | |
11214 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
b0e7825e | 11215 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11216 | "suggest parentheses around operand of " | |
11217 | "%<!%> or change %<&%> to %<&&%> or %<!%> to %<~%>"); | |
82012ffe | 11218 | return; |
e534436e | 11219 | |
82012ffe | 11220 | case EQ_EXPR: |
b0e7825e | 11221 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11222 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11223 | "suggest parentheses around comparison in operand of %<==%>"); | |
11224 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11225 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11226 | "suggest parentheses around comparison in operand of %<==%>"); |
11227 | return; | |
11228 | case NE_EXPR: | |
b0e7825e | 11229 | if (TREE_CODE_CLASS (code_left) == tcc_comparison) |
11230 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, | |
11231 | "suggest parentheses around comparison in operand of %<!=%>"); | |
11232 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison) | |
11233 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
82012ffe | 11234 | "suggest parentheses around comparison in operand of %<!=%>"); |
11235 | return; | |
11236 | ||
11237 | default: | |
b0e7825e | 11238 | if (TREE_CODE_CLASS (code) == tcc_comparison) |
11239 | { | |
11240 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
269f7979 | 11241 | && code_left != NE_EXPR && code_left != EQ_EXPR |
11242 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_left))) | |
b0e7825e | 11243 | warning_at (EXPR_LOC_OR_LOC (arg_left, loc), OPT_Wparentheses, |
11244 | "comparisons like %<X<=Y<=Z%> do not " | |
11245 | "have their mathematical meaning"); | |
11246 | else if (TREE_CODE_CLASS (code_right) == tcc_comparison | |
269f7979 | 11247 | && code_right != NE_EXPR && code_right != EQ_EXPR |
b0e7825e | 11248 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_right))) |
11249 | warning_at (EXPR_LOC_OR_LOC (arg_right, loc), OPT_Wparentheses, | |
11250 | "comparisons like %<X<=Y<=Z%> do not " | |
11251 | "have their mathematical meaning"); | |
11252 | } | |
82012ffe | 11253 | return; |
6ce0c450 | 11254 | } |
82012ffe | 11255 | #undef NOT_A_BOOLEAN_EXPR_P |
e534436e | 11256 | } |
11257 | ||
92fccaaa | 11258 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
11259 | ||
11260 | void | |
11261 | warn_for_unused_label (tree label) | |
11262 | { | |
11263 | if (!TREE_USED (label)) | |
11264 | { | |
11265 | if (DECL_INITIAL (label)) | |
11266 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
11267 | else | |
11268 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
11269 | } | |
11270 | } | |
2840aae4 | 11271 | |
b6889cb0 | 11272 | /* Warn for division by zero according to the value of DIVISOR. LOC |
11273 | is the location of the division operator. */ | |
f092582b | 11274 | |
11275 | void | |
b6889cb0 | 11276 | warn_for_div_by_zero (location_t loc, tree divisor) |
f092582b | 11277 | { |
9421ebb9 | 11278 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
11279 | about division by zero. Do not issue a warning if DIVISOR has a | |
f092582b | 11280 | floating-point type, since we consider 0.0/0.0 a valid way of |
11281 | generating a NaN. */ | |
48d94ede | 11282 | if (c_inhibit_evaluation_warnings == 0 |
9421ebb9 | 11283 | && (integer_zerop (divisor) || fixed_zerop (divisor))) |
b6889cb0 | 11284 | warning_at (loc, OPT_Wdiv_by_zero, "division by zero"); |
f092582b | 11285 | } |
11286 | ||
13869a99 | 11287 | /* Subroutine of build_binary_op. Give warnings for comparisons |
11288 | between signed and unsigned quantities that may fail. Do the | |
11289 | checking based on the original operand trees ORIG_OP0 and ORIG_OP1, | |
11290 | so that casts will be considered, but default promotions won't | |
8e70fb09 | 11291 | be. |
11292 | ||
11293 | LOCATION is the location of the comparison operator. | |
13869a99 | 11294 | |
11295 | The arguments of this function map directly to local variables | |
11296 | of build_binary_op. */ | |
11297 | ||
48e1416a | 11298 | void |
8e70fb09 | 11299 | warn_for_sign_compare (location_t location, |
48e1416a | 11300 | tree orig_op0, tree orig_op1, |
11301 | tree op0, tree op1, | |
13869a99 | 11302 | tree result_type, enum tree_code resultcode) |
11303 | { | |
11304 | int op0_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op0)); | |
11305 | int op1_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op1)); | |
11306 | int unsignedp0, unsignedp1; | |
48e1416a | 11307 | |
13869a99 | 11308 | /* In C++, check for comparison of different enum types. */ |
11309 | if (c_dialect_cxx() | |
11310 | && TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE | |
11311 | && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE | |
11312 | && TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0)) | |
895b662f | 11313 | != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1))) |
13869a99 | 11314 | { |
8e70fb09 | 11315 | warning_at (location, |
11316 | OPT_Wsign_compare, "comparison between types %qT and %qT", | |
11317 | TREE_TYPE (orig_op0), TREE_TYPE (orig_op1)); | |
13869a99 | 11318 | } |
11319 | ||
11320 | /* Do not warn if the comparison is being done in a signed type, | |
11321 | since the signed type will only be chosen if it can represent | |
11322 | all the values of the unsigned type. */ | |
11323 | if (!TYPE_UNSIGNED (result_type)) | |
11324 | /* OK */; | |
11325 | /* Do not warn if both operands are unsigned. */ | |
11326 | else if (op0_signed == op1_signed) | |
11327 | /* OK */; | |
11328 | else | |
11329 | { | |
895b662f | 11330 | tree sop, uop, base_type; |
13869a99 | 11331 | bool ovf; |
895b662f | 11332 | |
13869a99 | 11333 | if (op0_signed) |
11334 | sop = orig_op0, uop = orig_op1; | |
48e1416a | 11335 | else |
13869a99 | 11336 | sop = orig_op1, uop = orig_op0; |
11337 | ||
48e1416a | 11338 | STRIP_TYPE_NOPS (sop); |
13869a99 | 11339 | STRIP_TYPE_NOPS (uop); |
895b662f | 11340 | base_type = (TREE_CODE (result_type) == COMPLEX_TYPE |
11341 | ? TREE_TYPE (result_type) : result_type); | |
13869a99 | 11342 | |
11343 | /* Do not warn if the signed quantity is an unsuffixed integer | |
11344 | literal (or some static constant expression involving such | |
11345 | literals or a conditional expression involving such literals) | |
11346 | and it is non-negative. */ | |
11347 | if (tree_expr_nonnegative_warnv_p (sop, &ovf)) | |
11348 | /* OK */; | |
11349 | /* Do not warn if the comparison is an equality operation, the | |
11350 | unsigned quantity is an integral constant, and it would fit | |
11351 | in the result if the result were signed. */ | |
11352 | else if (TREE_CODE (uop) == INTEGER_CST | |
11353 | && (resultcode == EQ_EXPR || resultcode == NE_EXPR) | |
895b662f | 11354 | && int_fits_type_p (uop, c_common_signed_type (base_type))) |
13869a99 | 11355 | /* OK */; |
11356 | /* In C, do not warn if the unsigned quantity is an enumeration | |
11357 | constant and its maximum value would fit in the result if the | |
11358 | result were signed. */ | |
11359 | else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST | |
11360 | && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE | |
11361 | && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)), | |
895b662f | 11362 | c_common_signed_type (base_type))) |
13869a99 | 11363 | /* OK */; |
48e1416a | 11364 | else |
8e70fb09 | 11365 | warning_at (location, |
48e1416a | 11366 | OPT_Wsign_compare, |
8e70fb09 | 11367 | "comparison between signed and unsigned integer expressions"); |
13869a99 | 11368 | } |
48e1416a | 11369 | |
13869a99 | 11370 | /* Warn if two unsigned values are being compared in a size larger |
11371 | than their original size, and one (and only one) is the result of | |
11372 | a `~' operator. This comparison will always fail. | |
48e1416a | 11373 | |
13869a99 | 11374 | Also warn if one operand is a constant, and the constant does not |
11375 | have all bits set that are set in the ~ operand when it is | |
11376 | extended. */ | |
11377 | ||
7f506bca | 11378 | op0 = c_common_get_narrower (op0, &unsignedp0); |
11379 | op1 = c_common_get_narrower (op1, &unsignedp1); | |
48e1416a | 11380 | |
13869a99 | 11381 | if ((TREE_CODE (op0) == BIT_NOT_EXPR) |
11382 | ^ (TREE_CODE (op1) == BIT_NOT_EXPR)) | |
11383 | { | |
11384 | if (TREE_CODE (op0) == BIT_NOT_EXPR) | |
7f506bca | 11385 | op0 = c_common_get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); |
13869a99 | 11386 | if (TREE_CODE (op1) == BIT_NOT_EXPR) |
7f506bca | 11387 | op1 = c_common_get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); |
13869a99 | 11388 | |
e913b5cd | 11389 | if (tree_fits_shwi_p (op0) || tree_fits_shwi_p (op1)) |
13869a99 | 11390 | { |
11391 | tree primop; | |
11392 | HOST_WIDE_INT constant, mask; | |
11393 | int unsignedp; | |
11394 | unsigned int bits; | |
48e1416a | 11395 | |
e913b5cd | 11396 | if (tree_fits_shwi_p (op0)) |
13869a99 | 11397 | { |
11398 | primop = op1; | |
11399 | unsignedp = unsignedp1; | |
e913b5cd | 11400 | constant = tree_to_shwi (op0); |
13869a99 | 11401 | } |
11402 | else | |
11403 | { | |
11404 | primop = op0; | |
11405 | unsignedp = unsignedp0; | |
e913b5cd | 11406 | constant = tree_to_shwi (op1); |
13869a99 | 11407 | } |
48e1416a | 11408 | |
13869a99 | 11409 | bits = TYPE_PRECISION (TREE_TYPE (primop)); |
11410 | if (bits < TYPE_PRECISION (result_type) | |
11411 | && bits < HOST_BITS_PER_LONG && unsignedp) | |
11412 | { | |
11413 | mask = (~ (HOST_WIDE_INT) 0) << bits; | |
11414 | if ((mask & constant) != mask) | |
11415 | { | |
11416 | if (constant == 0) | |
76fdceeb | 11417 | warning_at (location, OPT_Wsign_compare, |
11418 | "promoted ~unsigned is always non-zero"); | |
13869a99 | 11419 | else |
48e1416a | 11420 | warning_at (location, OPT_Wsign_compare, |
8e70fb09 | 11421 | "comparison of promoted ~unsigned with constant"); |
13869a99 | 11422 | } |
11423 | } | |
11424 | } | |
11425 | else if (unsignedp0 && unsignedp1 | |
11426 | && (TYPE_PRECISION (TREE_TYPE (op0)) | |
11427 | < TYPE_PRECISION (result_type)) | |
11428 | && (TYPE_PRECISION (TREE_TYPE (op1)) | |
11429 | < TYPE_PRECISION (result_type))) | |
8e70fb09 | 11430 | warning_at (location, OPT_Wsign_compare, |
13869a99 | 11431 | "comparison of promoted ~unsigned with unsigned"); |
11432 | } | |
11433 | } | |
11434 | ||
5ba33bf4 | 11435 | /* RESULT_TYPE is the result of converting TYPE1 and TYPE2 to a common |
11436 | type via c_common_type. If -Wdouble-promotion is in use, and the | |
11437 | conditions for warning have been met, issue a warning. GMSGID is | |
11438 | the warning message. It must have two %T specifiers for the type | |
11439 | that was converted (generally "float") and the type to which it was | |
11440 | converted (generally "double), respectively. LOC is the location | |
11441 | to which the awrning should refer. */ | |
11442 | ||
11443 | void | |
11444 | do_warn_double_promotion (tree result_type, tree type1, tree type2, | |
11445 | const char *gmsgid, location_t loc) | |
11446 | { | |
11447 | tree source_type; | |
11448 | ||
11449 | if (!warn_double_promotion) | |
11450 | return; | |
11451 | /* If the conversion will not occur at run-time, there is no need to | |
11452 | warn about it. */ | |
11453 | if (c_inhibit_evaluation_warnings) | |
11454 | return; | |
11455 | if (TYPE_MAIN_VARIANT (result_type) != double_type_node | |
11456 | && TYPE_MAIN_VARIANT (result_type) != complex_double_type_node) | |
11457 | return; | |
11458 | if (TYPE_MAIN_VARIANT (type1) == float_type_node | |
11459 | || TYPE_MAIN_VARIANT (type1) == complex_float_type_node) | |
11460 | source_type = type1; | |
11461 | else if (TYPE_MAIN_VARIANT (type2) == float_type_node | |
11462 | || TYPE_MAIN_VARIANT (type2) == complex_float_type_node) | |
11463 | source_type = type2; | |
11464 | else | |
11465 | return; | |
11466 | warning_at (loc, OPT_Wdouble_promotion, gmsgid, source_type, result_type); | |
11467 | } | |
11468 | ||
41771881 | 11469 | /* Setup a TYPE_DECL node as a typedef representation. |
11470 | ||
11471 | X is a TYPE_DECL for a typedef statement. Create a brand new | |
11472 | ..._TYPE node (which will be just a variant of the existing | |
11473 | ..._TYPE node with identical properties) and then install X | |
11474 | as the TYPE_NAME of this brand new (duplicate) ..._TYPE node. | |
11475 | ||
11476 | The whole point here is to end up with a situation where each | |
11477 | and every ..._TYPE node the compiler creates will be uniquely | |
11478 | associated with AT MOST one node representing a typedef name. | |
11479 | This way, even though the compiler substitutes corresponding | |
11480 | ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very | |
11481 | early on, later parts of the compiler can always do the reverse | |
11482 | translation and get back the corresponding typedef name. For | |
11483 | example, given: | |
ab2c1de8 | 11484 | |
41771881 | 11485 | typedef struct S MY_TYPE; |
11486 | MY_TYPE object; | |
11487 | ||
11488 | Later parts of the compiler might only know that `object' was of | |
11489 | type `struct S' if it were not for code just below. With this | |
11490 | code however, later parts of the compiler see something like: | |
11491 | ||
11492 | struct S' == struct S | |
11493 | typedef struct S' MY_TYPE; | |
11494 | struct S' object; | |
11495 | ||
11496 | And they can then deduce (from the node for type struct S') that | |
11497 | the original object declaration was: | |
11498 | ||
11499 | MY_TYPE object; | |
11500 | ||
11501 | Being able to do this is important for proper support of protoize, | |
11502 | and also for generating precise symbolic debugging information | |
11503 | which takes full account of the programmer's (typedef) vocabulary. | |
11504 | ||
11505 | Obviously, we don't want to generate a duplicate ..._TYPE node if | |
11506 | the TYPE_DECL node that we are now processing really represents a | |
11507 | standard built-in type. */ | |
11508 | ||
11509 | void | |
11510 | set_underlying_type (tree x) | |
11511 | { | |
11512 | if (x == error_mark_node) | |
11513 | return; | |
11514 | if (DECL_IS_BUILTIN (x)) | |
11515 | { | |
11516 | if (TYPE_NAME (TREE_TYPE (x)) == 0) | |
11517 | TYPE_NAME (TREE_TYPE (x)) = x; | |
11518 | } | |
11519 | else if (TREE_TYPE (x) != error_mark_node | |
11520 | && DECL_ORIGINAL_TYPE (x) == NULL_TREE) | |
11521 | { | |
11522 | tree tt = TREE_TYPE (x); | |
11523 | DECL_ORIGINAL_TYPE (x) = tt; | |
11524 | tt = build_variant_type_copy (tt); | |
11525 | TYPE_STUB_DECL (tt) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x)); | |
11526 | TYPE_NAME (tt) = x; | |
11527 | TREE_USED (tt) = TREE_USED (x); | |
11528 | TREE_TYPE (x) = tt; | |
11529 | } | |
11530 | } | |
11531 | ||
1a4c44c5 | 11532 | /* Record the types used by the current global variable declaration |
11533 | being parsed, so that we can decide later to emit their debug info. | |
11534 | Those types are in types_used_by_cur_var_decl, and we are going to | |
11535 | store them in the types_used_by_vars_hash hash table. | |
11536 | DECL is the declaration of the global variable that has been parsed. */ | |
11537 | ||
11538 | void | |
11539 | record_types_used_by_current_var_decl (tree decl) | |
11540 | { | |
11541 | gcc_assert (decl && DECL_P (decl) && TREE_STATIC (decl)); | |
11542 | ||
f1f41a6c | 11543 | while (types_used_by_cur_var_decl && !types_used_by_cur_var_decl->is_empty ()) |
1a4c44c5 | 11544 | { |
f1f41a6c | 11545 | tree type = types_used_by_cur_var_decl->pop (); |
aef48c9a | 11546 | types_used_by_var_decl_insert (type, decl); |
1a4c44c5 | 11547 | } |
11548 | } | |
11549 | ||
a4e3ffad | 11550 | /* If DECL is a typedef that is declared in the current function, |
11551 | record it for the purpose of -Wunused-local-typedefs. */ | |
11552 | ||
11553 | void | |
11554 | record_locally_defined_typedef (tree decl) | |
11555 | { | |
11556 | struct c_language_function *l; | |
11557 | ||
11558 | if (!warn_unused_local_typedefs | |
11559 | || cfun == NULL | |
11560 | /* if this is not a locally defined typedef then we are not | |
11561 | interested. */ | |
11562 | || !is_typedef_decl (decl) | |
11563 | || !decl_function_context (decl)) | |
11564 | return; | |
11565 | ||
11566 | l = (struct c_language_function *) cfun->language; | |
f1f41a6c | 11567 | vec_safe_push (l->local_typedefs, decl); |
a4e3ffad | 11568 | } |
11569 | ||
11570 | /* If T is a TYPE_DECL declared locally, mark it as used. */ | |
11571 | ||
11572 | void | |
11573 | maybe_record_typedef_use (tree t) | |
11574 | { | |
11575 | if (!is_typedef_decl (t)) | |
11576 | return; | |
11577 | ||
11578 | TREE_USED (t) = true; | |
11579 | } | |
11580 | ||
11581 | /* Warn if there are some unused locally defined typedefs in the | |
11582 | current function. */ | |
11583 | ||
11584 | void | |
11585 | maybe_warn_unused_local_typedefs (void) | |
11586 | { | |
11587 | int i; | |
11588 | tree decl; | |
11589 | /* The number of times we have emitted -Wunused-local-typedefs | |
11590 | warnings. If this is different from errorcount, that means some | |
11591 | unrelated errors have been issued. In which case, we'll avoid | |
11592 | emitting "unused-local-typedefs" warnings. */ | |
11593 | static int unused_local_typedefs_warn_count; | |
11594 | struct c_language_function *l; | |
11595 | ||
11596 | if (cfun == NULL) | |
11597 | return; | |
11598 | ||
11599 | if ((l = (struct c_language_function *) cfun->language) == NULL) | |
11600 | return; | |
11601 | ||
11602 | if (warn_unused_local_typedefs | |
11603 | && errorcount == unused_local_typedefs_warn_count) | |
11604 | { | |
f1f41a6c | 11605 | FOR_EACH_VEC_SAFE_ELT (l->local_typedefs, i, decl) |
a4e3ffad | 11606 | if (!TREE_USED (decl)) |
11607 | warning_at (DECL_SOURCE_LOCATION (decl), | |
11608 | OPT_Wunused_local_typedefs, | |
11609 | "typedef %qD locally defined but not used", decl); | |
11610 | unused_local_typedefs_warn_count = errorcount; | |
11611 | } | |
11612 | ||
f1f41a6c | 11613 | vec_free (l->local_typedefs); |
a4e3ffad | 11614 | } |
11615 | ||
78bf4156 | 11616 | /* Warn about boolean expression compared with an integer value different |
11617 | from true/false. Warns also e.g. about "(i1 == i2) == 2". | |
11618 | LOC is the location of the comparison, CODE is its code, OP0 and OP1 | |
11619 | are the operands of the comparison. The caller must ensure that | |
11620 | either operand is a boolean expression. */ | |
11621 | ||
11622 | void | |
11623 | maybe_warn_bool_compare (location_t loc, enum tree_code code, tree op0, | |
11624 | tree op1) | |
11625 | { | |
11626 | if (TREE_CODE_CLASS (code) != tcc_comparison) | |
11627 | return; | |
11628 | ||
11629 | tree cst = (TREE_CODE (op0) == INTEGER_CST) | |
11630 | ? op0 : (TREE_CODE (op1) == INTEGER_CST) ? op1 : NULL_TREE; | |
11631 | if (!cst) | |
11632 | return; | |
11633 | ||
11634 | if (!integer_zerop (cst) && !integer_onep (cst)) | |
11635 | { | |
11636 | int sign = (TREE_CODE (op0) == INTEGER_CST) | |
11637 | ? tree_int_cst_sgn (cst) : -tree_int_cst_sgn (cst); | |
11638 | if (code == EQ_EXPR | |
11639 | || ((code == GT_EXPR || code == GE_EXPR) && sign < 0) | |
11640 | || ((code == LT_EXPR || code == LE_EXPR) && sign > 0)) | |
11641 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
11642 | "with boolean expression is always false", cst); | |
11643 | else | |
11644 | warning_at (loc, OPT_Wbool_compare, "comparison of constant %qE " | |
11645 | "with boolean expression is always true", cst); | |
11646 | } | |
11647 | } | |
11648 | ||
f352a3fb | 11649 | /* The C and C++ parsers both use vectors to hold function arguments. |
11650 | For efficiency, we keep a cache of unused vectors. This is the | |
11651 | cache. */ | |
11652 | ||
f1f41a6c | 11653 | typedef vec<tree, va_gc> *tree_gc_vec; |
11654 | static GTY((deletable)) vec<tree_gc_vec, va_gc> *tree_vector_cache; | |
f352a3fb | 11655 | |
11656 | /* Return a new vector from the cache. If the cache is empty, | |
11657 | allocate a new vector. These vectors are GC'ed, so it is OK if the | |
11658 | pointer is not released.. */ | |
11659 | ||
f1f41a6c | 11660 | vec<tree, va_gc> * |
f352a3fb | 11661 | make_tree_vector (void) |
11662 | { | |
f1f41a6c | 11663 | if (tree_vector_cache && !tree_vector_cache->is_empty ()) |
11664 | return tree_vector_cache->pop (); | |
f352a3fb | 11665 | else |
11666 | { | |
f1f41a6c | 11667 | /* Passing 0 to vec::alloc returns NULL, and our callers require |
f352a3fb | 11668 | that we always return a non-NULL value. The vector code uses |
11669 | 4 when growing a NULL vector, so we do too. */ | |
f1f41a6c | 11670 | vec<tree, va_gc> *v; |
11671 | vec_alloc (v, 4); | |
11672 | return v; | |
f352a3fb | 11673 | } |
11674 | } | |
11675 | ||
11676 | /* Release a vector of trees back to the cache. */ | |
11677 | ||
11678 | void | |
f1f41a6c | 11679 | release_tree_vector (vec<tree, va_gc> *vec) |
f352a3fb | 11680 | { |
11681 | if (vec != NULL) | |
11682 | { | |
f1f41a6c | 11683 | vec->truncate (0); |
11684 | vec_safe_push (tree_vector_cache, vec); | |
f352a3fb | 11685 | } |
11686 | } | |
11687 | ||
11688 | /* Get a new tree vector holding a single tree. */ | |
11689 | ||
f1f41a6c | 11690 | vec<tree, va_gc> * |
f352a3fb | 11691 | make_tree_vector_single (tree t) |
11692 | { | |
f1f41a6c | 11693 | vec<tree, va_gc> *ret = make_tree_vector (); |
11694 | ret->quick_push (t); | |
f352a3fb | 11695 | return ret; |
11696 | } | |
11697 | ||
c66c81be | 11698 | /* Get a new tree vector of the TREE_VALUEs of a TREE_LIST chain. */ |
11699 | ||
f1f41a6c | 11700 | vec<tree, va_gc> * |
c66c81be | 11701 | make_tree_vector_from_list (tree list) |
11702 | { | |
f1f41a6c | 11703 | vec<tree, va_gc> *ret = make_tree_vector (); |
c66c81be | 11704 | for (; list; list = TREE_CHAIN (list)) |
f1f41a6c | 11705 | vec_safe_push (ret, TREE_VALUE (list)); |
c66c81be | 11706 | return ret; |
11707 | } | |
11708 | ||
f352a3fb | 11709 | /* Get a new tree vector which is a copy of an existing one. */ |
11710 | ||
f1f41a6c | 11711 | vec<tree, va_gc> * |
11712 | make_tree_vector_copy (const vec<tree, va_gc> *orig) | |
f352a3fb | 11713 | { |
f1f41a6c | 11714 | vec<tree, va_gc> *ret; |
f352a3fb | 11715 | unsigned int ix; |
11716 | tree t; | |
11717 | ||
11718 | ret = make_tree_vector (); | |
f1f41a6c | 11719 | vec_safe_reserve (ret, vec_safe_length (orig)); |
11720 | FOR_EACH_VEC_SAFE_ELT (orig, ix, t) | |
11721 | ret->quick_push (t); | |
f352a3fb | 11722 | return ret; |
11723 | } | |
11724 | ||
a9ffdd35 | 11725 | /* Return true if KEYWORD starts a type specifier. */ |
11726 | ||
11727 | bool | |
11728 | keyword_begins_type_specifier (enum rid keyword) | |
11729 | { | |
11730 | switch (keyword) | |
11731 | { | |
4fba5eb9 | 11732 | case RID_AUTO_TYPE: |
a9ffdd35 | 11733 | case RID_INT: |
11734 | case RID_CHAR: | |
11735 | case RID_FLOAT: | |
11736 | case RID_DOUBLE: | |
11737 | case RID_VOID: | |
11738 | case RID_INT128: | |
11739 | case RID_UNSIGNED: | |
11740 | case RID_LONG: | |
11741 | case RID_SHORT: | |
11742 | case RID_SIGNED: | |
11743 | case RID_DFLOAT32: | |
11744 | case RID_DFLOAT64: | |
11745 | case RID_DFLOAT128: | |
11746 | case RID_FRACT: | |
11747 | case RID_ACCUM: | |
11748 | case RID_BOOL: | |
11749 | case RID_WCHAR: | |
11750 | case RID_CHAR16: | |
11751 | case RID_CHAR32: | |
11752 | case RID_SAT: | |
11753 | case RID_COMPLEX: | |
11754 | case RID_TYPEOF: | |
11755 | case RID_STRUCT: | |
11756 | case RID_CLASS: | |
11757 | case RID_UNION: | |
11758 | case RID_ENUM: | |
11759 | return true; | |
11760 | default: | |
11761 | return false; | |
11762 | } | |
11763 | } | |
11764 | ||
11765 | /* Return true if KEYWORD names a type qualifier. */ | |
11766 | ||
11767 | bool | |
11768 | keyword_is_type_qualifier (enum rid keyword) | |
11769 | { | |
11770 | switch (keyword) | |
11771 | { | |
11772 | case RID_CONST: | |
11773 | case RID_VOLATILE: | |
11774 | case RID_RESTRICT: | |
b560fabd | 11775 | case RID_ATOMIC: |
a9ffdd35 | 11776 | return true; |
11777 | default: | |
11778 | return false; | |
11779 | } | |
11780 | } | |
11781 | ||
11782 | /* Return true if KEYWORD names a storage class specifier. | |
11783 | ||
11784 | RID_TYPEDEF is not included in this list despite `typedef' being | |
11785 | listed in C99 6.7.1.1. 6.7.1.3 indicates that `typedef' is listed as | |
11786 | such for syntactic convenience only. */ | |
11787 | ||
11788 | bool | |
11789 | keyword_is_storage_class_specifier (enum rid keyword) | |
11790 | { | |
11791 | switch (keyword) | |
11792 | { | |
11793 | case RID_STATIC: | |
11794 | case RID_EXTERN: | |
11795 | case RID_REGISTER: | |
11796 | case RID_AUTO: | |
11797 | case RID_MUTABLE: | |
11798 | case RID_THREAD: | |
11799 | return true; | |
11800 | default: | |
11801 | return false; | |
11802 | } | |
11803 | } | |
11804 | ||
fad3f658 | 11805 | /* Return true if KEYWORD names a function-specifier [dcl.fct.spec]. */ |
11806 | ||
11807 | static bool | |
11808 | keyword_is_function_specifier (enum rid keyword) | |
11809 | { | |
11810 | switch (keyword) | |
11811 | { | |
11812 | case RID_INLINE: | |
985c6e3a | 11813 | case RID_NORETURN: |
fad3f658 | 11814 | case RID_VIRTUAL: |
11815 | case RID_EXPLICIT: | |
11816 | return true; | |
11817 | default: | |
11818 | return false; | |
11819 | } | |
11820 | } | |
11821 | ||
11822 | /* Return true if KEYWORD names a decl-specifier [dcl.spec] or a | |
11823 | declaration-specifier (C99 6.7). */ | |
11824 | ||
11825 | bool | |
11826 | keyword_is_decl_specifier (enum rid keyword) | |
11827 | { | |
11828 | if (keyword_is_storage_class_specifier (keyword) | |
11829 | || keyword_is_type_qualifier (keyword) | |
11830 | || keyword_is_function_specifier (keyword)) | |
11831 | return true; | |
11832 | ||
11833 | switch (keyword) | |
11834 | { | |
11835 | case RID_TYPEDEF: | |
11836 | case RID_FRIEND: | |
11837 | case RID_CONSTEXPR: | |
11838 | return true; | |
11839 | default: | |
11840 | return false; | |
11841 | } | |
11842 | } | |
11843 | ||
9b88d08d | 11844 | /* Initialize language-specific-bits of tree_contains_struct. */ |
11845 | ||
11846 | void | |
11847 | c_common_init_ts (void) | |
11848 | { | |
11849 | MARK_TS_TYPED (C_MAYBE_CONST_EXPR); | |
11850 | MARK_TS_TYPED (EXCESS_PRECISION_EXPR); | |
3c6d4197 | 11851 | MARK_TS_TYPED (ARRAY_NOTATION_REF); |
9b88d08d | 11852 | } |
11853 | ||
244db24d | 11854 | /* Build a user-defined numeric literal out of an integer constant type VALUE |
11855 | with identifier SUFFIX. */ | |
11856 | ||
11857 | tree | |
324ca377 | 11858 | build_userdef_literal (tree suffix_id, tree value, |
11859 | enum overflow_type overflow, tree num_string) | |
244db24d | 11860 | { |
11861 | tree literal = make_node (USERDEF_LITERAL); | |
11862 | USERDEF_LITERAL_SUFFIX_ID (literal) = suffix_id; | |
11863 | USERDEF_LITERAL_VALUE (literal) = value; | |
324ca377 | 11864 | USERDEF_LITERAL_OVERFLOW (literal) = overflow; |
244db24d | 11865 | USERDEF_LITERAL_NUM_STRING (literal) = num_string; |
11866 | return literal; | |
11867 | } | |
11868 | ||
7059d45d | 11869 | /* For vector[index], convert the vector to a |
11870 | pointer of the underlying type. */ | |
11871 | void | |
11872 | convert_vector_to_pointer_for_subscript (location_t loc, | |
11873 | tree* vecp, tree index) | |
11874 | { | |
11875 | if (TREE_CODE (TREE_TYPE (*vecp)) == VECTOR_TYPE) | |
11876 | { | |
11877 | tree type = TREE_TYPE (*vecp); | |
11878 | tree type1; | |
11879 | ||
11880 | if (TREE_CODE (index) == INTEGER_CST) | |
e913b5cd | 11881 | if (!tree_fits_uhwi_p (index) |
aa59f000 | 11882 | || tree_to_uhwi (index) >= TYPE_VECTOR_SUBPARTS (type)) |
7059d45d | 11883 | warning_at (loc, OPT_Warray_bounds, "index value is out of bound"); |
11884 | ||
11885 | c_common_mark_addressable_vec (*vecp); | |
11886 | type = build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type)); | |
7059d45d | 11887 | type1 = build_pointer_type (TREE_TYPE (*vecp)); |
b2ca6510 | 11888 | bool ref_all = TYPE_REF_CAN_ALIAS_ALL (type1); |
11889 | if (!ref_all | |
11890 | && !DECL_P (*vecp)) | |
11891 | { | |
11892 | /* If the original vector isn't declared may_alias and it | |
11893 | isn't a bare vector look if the subscripting would | |
11894 | alias the vector we subscript, and if not, force ref-all. */ | |
11895 | alias_set_type vecset = get_alias_set (*vecp); | |
11896 | alias_set_type sset = get_alias_set (type); | |
11897 | if (!alias_sets_must_conflict_p (sset, vecset) | |
11898 | && !alias_set_subset_of (sset, vecset)) | |
11899 | ref_all = true; | |
11900 | } | |
11901 | type = build_pointer_type_for_mode (type, ptr_mode, ref_all); | |
7059d45d | 11902 | *vecp = build1 (ADDR_EXPR, type1, *vecp); |
11903 | *vecp = convert (type, *vecp); | |
11904 | } | |
11905 | } | |
11906 | ||
41ed701a | 11907 | /* Determine which of the operands, if any, is a scalar that needs to be |
11908 | converted to a vector, for the range of operations. */ | |
11909 | enum stv_conv | |
11910 | scalar_to_vector (location_t loc, enum tree_code code, tree op0, tree op1, | |
11911 | bool complain) | |
11912 | { | |
11913 | tree type0 = TREE_TYPE (op0); | |
11914 | tree type1 = TREE_TYPE (op1); | |
11915 | bool integer_only_op = false; | |
11916 | enum stv_conv ret = stv_firstarg; | |
11917 | ||
11918 | gcc_assert (TREE_CODE (type0) == VECTOR_TYPE | |
11919 | || TREE_CODE (type1) == VECTOR_TYPE); | |
11920 | switch (code) | |
11921 | { | |
11922 | /* Most GENERIC binary expressions require homogeneous arguments. | |
11923 | LSHIFT_EXPR and RSHIFT_EXPR are exceptions and accept a first | |
11924 | argument that is a vector and a second one that is a scalar, so | |
11925 | we never return stv_secondarg for them. */ | |
11926 | case RSHIFT_EXPR: | |
11927 | case LSHIFT_EXPR: | |
11928 | if (TREE_CODE (type0) == INTEGER_TYPE | |
11929 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
11930 | { | |
22a75734 | 11931 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 11932 | { |
11933 | if (complain) | |
11934 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
11935 | "involves truncation", type0, type1); | |
11936 | return stv_error; | |
11937 | } | |
11938 | else | |
11939 | return stv_firstarg; | |
11940 | } | |
11941 | break; | |
11942 | ||
11943 | case BIT_IOR_EXPR: | |
11944 | case BIT_XOR_EXPR: | |
11945 | case BIT_AND_EXPR: | |
11946 | integer_only_op = true; | |
11947 | /* ... fall through ... */ | |
11948 | ||
7b463b19 | 11949 | case VEC_COND_EXPR: |
11950 | ||
41ed701a | 11951 | case PLUS_EXPR: |
11952 | case MINUS_EXPR: | |
11953 | case MULT_EXPR: | |
11954 | case TRUNC_DIV_EXPR: | |
11955 | case CEIL_DIV_EXPR: | |
11956 | case FLOOR_DIV_EXPR: | |
11957 | case ROUND_DIV_EXPR: | |
11958 | case EXACT_DIV_EXPR: | |
11959 | case TRUNC_MOD_EXPR: | |
11960 | case FLOOR_MOD_EXPR: | |
11961 | case RDIV_EXPR: | |
11962 | case EQ_EXPR: | |
11963 | case NE_EXPR: | |
11964 | case LE_EXPR: | |
11965 | case GE_EXPR: | |
11966 | case LT_EXPR: | |
11967 | case GT_EXPR: | |
11968 | /* What about UNLT_EXPR? */ | |
11969 | if (TREE_CODE (type0) == VECTOR_TYPE) | |
11970 | { | |
11971 | tree tmp; | |
11972 | ret = stv_secondarg; | |
11973 | /* Swap TYPE0 with TYPE1 and OP0 with OP1 */ | |
11974 | tmp = type0; type0 = type1; type1 = tmp; | |
11975 | tmp = op0; op0 = op1; op1 = tmp; | |
11976 | } | |
11977 | ||
11978 | if (TREE_CODE (type0) == INTEGER_TYPE | |
11979 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
11980 | { | |
22a75734 | 11981 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 11982 | { |
11983 | if (complain) | |
11984 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
11985 | "involves truncation", type0, type1); | |
11986 | return stv_error; | |
11987 | } | |
11988 | return ret; | |
11989 | } | |
11990 | else if (!integer_only_op | |
11991 | /* Allow integer --> real conversion if safe. */ | |
11992 | && (TREE_CODE (type0) == REAL_TYPE | |
11993 | || TREE_CODE (type0) == INTEGER_TYPE) | |
11994 | && SCALAR_FLOAT_TYPE_P (TREE_TYPE (type1))) | |
11995 | { | |
22a75734 | 11996 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, false)) |
41ed701a | 11997 | { |
11998 | if (complain) | |
11999 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
12000 | "involves truncation", type0, type1); | |
12001 | return stv_error; | |
12002 | } | |
12003 | return ret; | |
12004 | } | |
12005 | default: | |
12006 | break; | |
12007 | } | |
12008 | ||
12009 | return stv_nothing; | |
12010 | } | |
12011 | ||
ffcdbf9c | 12012 | /* Return true iff ALIGN is an integral constant that is a fundamental |
12013 | alignment, as defined by [basic.align] in the c++-11 | |
12014 | specifications. | |
12015 | ||
12016 | That is: | |
12017 | ||
12018 | [A fundamental alignment is represented by an alignment less than or | |
12019 | equal to the greatest alignment supported by the implementation | |
12020 | in all contexts, which is equal to | |
12021 | alignof(max_align_t)]. */ | |
12022 | ||
12023 | bool | |
12024 | cxx_fundamental_alignment_p (unsigned align) | |
12025 | { | |
12026 | return (align <= MAX (TYPE_ALIGN (long_long_integer_type_node), | |
12027 | TYPE_ALIGN (long_double_type_node))); | |
12028 | } | |
12029 | ||
46da3601 | 12030 | /* Return true if T is a pointer to a zero-sized aggregate. */ |
12031 | ||
12032 | bool | |
12033 | pointer_to_zero_sized_aggr_p (tree t) | |
12034 | { | |
12035 | if (!POINTER_TYPE_P (t)) | |
12036 | return false; | |
12037 | t = TREE_TYPE (t); | |
12038 | return (TYPE_SIZE (t) && integer_zerop (TYPE_SIZE (t))); | |
12039 | } | |
12040 | ||
7bedc3a0 | 12041 | #include "gt-c-family-c-common.h" |