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b0fc3e72 | 1 | /* Subroutines shared by all languages that are variants of C. |
d513ec2f | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
fdd84b77 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
2d9d8740 | 4 | Free Software Foundation, Inc. |
b0fc3e72 | 5 | |
f12b58b3 | 6 | This file is part of GCC. |
b0fc3e72 | 7 | |
f12b58b3 | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 10 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 11 | version. |
b0fc3e72 | 12 | |
f12b58b3 | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
b0fc3e72 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
b0fc3e72 | 21 | |
22 | #include "config.h" | |
405711de | 23 | #include "system.h" |
805e22b2 | 24 | #include "coretypes.h" |
25 | #include "tm.h" | |
e48d0f41 | 26 | #include "intl.h" |
b0fc3e72 | 27 | #include "tree.h" |
b0fc3e72 | 28 | #include "flags.h" |
cd03a192 | 29 | #include "output.h" |
a3fa7feb | 30 | #include "c-pragma.h" |
dc12af01 | 31 | #include "ggc.h" |
e41f0d80 | 32 | #include "c-common.h" |
6c536c4f | 33 | #include "c-objc.h" |
d8c9779c | 34 | #include "tm_p.h" |
4e91a871 | 35 | #include "obstack.h" |
a654e028 | 36 | #include "cpplib.h" |
8ee295a7 | 37 | #include "target.h" |
96554925 | 38 | #include "langhooks.h" |
f3dde807 | 39 | #include "tree-inline.h" |
69579044 | 40 | #include "toplev.h" |
7f5f3953 | 41 | #include "diagnostic.h" |
4ee9c684 | 42 | #include "tree-iterator.h" |
43 | #include "hashtab.h" | |
b55af61c | 44 | #include "tree-mudflap.h" |
e08bd2f4 | 45 | #include "opts.h" |
62eec3b4 | 46 | #include "cgraph.h" |
b9fc964a | 47 | #include "target-def.h" |
979d3efc | 48 | #include "libfuncs.h" |
fd6f6435 | 49 | |
90cc7820 | 50 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
a654e028 | 51 | |
72040e7e | 52 | /* The following symbols are subsumed in the c_global_trees array, and |
44e9fa65 | 53 | listed here individually for documentation purposes. |
72040e7e | 54 | |
55 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
56 | ||
57 | tree short_integer_type_node; | |
58 | tree long_integer_type_node; | |
59 | tree long_long_integer_type_node; | |
6388cfe2 | 60 | tree int128_integer_type_node; |
72040e7e | 61 | |
62 | tree short_unsigned_type_node; | |
63 | tree long_unsigned_type_node; | |
64 | tree long_long_unsigned_type_node; | |
6388cfe2 | 65 | tree int128_unsigned_type_node; |
72040e7e | 66 | |
3c2239cf | 67 | tree truthvalue_type_node; |
68 | tree truthvalue_false_node; | |
69 | tree truthvalue_true_node; | |
72040e7e | 70 | |
71 | tree ptrdiff_type_node; | |
72 | ||
73 | tree unsigned_char_type_node; | |
74 | tree signed_char_type_node; | |
75 | tree wchar_type_node; | |
72040e7e | 76 | |
924bbf02 | 77 | tree char16_type_node; |
78 | tree char32_type_node; | |
79 | ||
72040e7e | 80 | tree float_type_node; |
81 | tree double_type_node; | |
82 | tree long_double_type_node; | |
83 | ||
84 | tree complex_integer_type_node; | |
85 | tree complex_float_type_node; | |
86 | tree complex_double_type_node; | |
87 | tree complex_long_double_type_node; | |
88 | ||
c4503c0a | 89 | tree dfloat32_type_node; |
90 | tree dfloat64_type_node; | |
91 | tree_dfloat128_type_node; | |
92 | ||
72040e7e | 93 | tree intQI_type_node; |
94 | tree intHI_type_node; | |
95 | tree intSI_type_node; | |
96 | tree intDI_type_node; | |
97 | tree intTI_type_node; | |
98 | ||
99 | tree unsigned_intQI_type_node; | |
100 | tree unsigned_intHI_type_node; | |
101 | tree unsigned_intSI_type_node; | |
102 | tree unsigned_intDI_type_node; | |
103 | tree unsigned_intTI_type_node; | |
104 | ||
105 | tree widest_integer_literal_type_node; | |
106 | tree widest_unsigned_literal_type_node; | |
107 | ||
108 | Nodes for types `void *' and `const void *'. | |
109 | ||
110 | tree ptr_type_node, const_ptr_type_node; | |
111 | ||
112 | Nodes for types `char *' and `const char *'. | |
113 | ||
114 | tree string_type_node, const_string_type_node; | |
115 | ||
116 | Type `char[SOMENUMBER]'. | |
117 | Used when an array of char is needed and the size is irrelevant. | |
118 | ||
119 | tree char_array_type_node; | |
120 | ||
121 | Type `int[SOMENUMBER]' or something like it. | |
122 | Used when an array of int needed and the size is irrelevant. | |
123 | ||
124 | tree int_array_type_node; | |
125 | ||
126 | Type `wchar_t[SOMENUMBER]' or something like it. | |
127 | Used when a wide string literal is created. | |
128 | ||
129 | tree wchar_array_type_node; | |
130 | ||
924bbf02 | 131 | Type `char16_t[SOMENUMBER]' or something like it. |
132 | Used when a UTF-16 string literal is created. | |
133 | ||
134 | tree char16_array_type_node; | |
135 | ||
136 | Type `char32_t[SOMENUMBER]' or something like it. | |
137 | Used when a UTF-32 string literal is created. | |
138 | ||
139 | tree char32_array_type_node; | |
140 | ||
72040e7e | 141 | Type `int ()' -- used for implicit declaration of functions. |
142 | ||
143 | tree default_function_type; | |
144 | ||
72040e7e | 145 | A VOID_TYPE node, packaged in a TREE_LIST. |
146 | ||
147 | tree void_list_node; | |
148 | ||
734c98be | 149 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
65b7f83f | 150 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
151 | VAR_DECLS, but C++ does.) | |
71d9fc9b | 152 | |
65b7f83f | 153 | tree function_name_decl_node; |
734c98be | 154 | tree pretty_function_name_decl_node; |
65b7f83f | 155 | tree c99_function_name_decl_node; |
156 | ||
157 | Stack of nested function name VAR_DECLs. | |
1cae46be | 158 | |
65b7f83f | 159 | tree saved_function_name_decls; |
71d9fc9b | 160 | |
72040e7e | 161 | */ |
162 | ||
163 | tree c_global_trees[CTI_MAX]; | |
573aba85 | 164 | \f |
574a6990 | 165 | /* Switches common to the C front ends. */ |
166 | ||
f7070933 | 167 | /* Nonzero means don't output line number information. */ |
168 | ||
169 | char flag_no_line_commands; | |
170 | ||
171 | /* Nonzero causes -E output not to be done, but directives such as | |
172 | #define that have side effects are still obeyed. */ | |
173 | ||
174 | char flag_no_output; | |
175 | ||
176 | /* Nonzero means dump macros in some fashion. */ | |
177 | ||
178 | char flag_dump_macros; | |
179 | ||
180 | /* Nonzero means pass #include lines through to the output. */ | |
181 | ||
182 | char flag_dump_includes; | |
183 | ||
d718b525 | 184 | /* Nonzero means process PCH files while preprocessing. */ |
185 | ||
186 | bool flag_pch_preprocess; | |
187 | ||
573aba85 | 188 | /* The file name to which we should write a precompiled header, or |
189 | NULL if no header will be written in this compile. */ | |
190 | ||
191 | const char *pch_file; | |
192 | ||
1ed9d5f5 | 193 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
194 | user's namespace. */ | |
195 | int flag_iso; | |
196 | ||
1cae46be | 197 | /* Warn about #pragma directives that are not recognized. */ |
574a6990 | 198 | |
1cae46be | 199 | int warn_unknown_pragmas; /* Tri state variable. */ |
574a6990 | 200 | |
574a6990 | 201 | /* Warn about format/argument anomalies in calls to formatted I/O functions |
202 | (*printf, *scanf, strftime, strfmon, etc.). */ | |
203 | ||
204 | int warn_format; | |
205 | ||
574a6990 | 206 | /* C/ObjC language option variables. */ |
207 | ||
208 | ||
574a6990 | 209 | /* Nonzero means allow type mismatches in conditional expressions; |
210 | just make their values `void'. */ | |
211 | ||
212 | int flag_cond_mismatch; | |
213 | ||
214 | /* Nonzero means enable C89 Amendment 1 features. */ | |
215 | ||
216 | int flag_isoc94; | |
217 | ||
39012afb | 218 | /* Nonzero means use the ISO C99 (or C1X) dialect of C. */ |
574a6990 | 219 | |
220 | int flag_isoc99; | |
221 | ||
39012afb | 222 | /* Nonzero means use the ISO C1X dialect of C. */ |
223 | ||
224 | int flag_isoc1x; | |
225 | ||
8b332087 | 226 | /* Nonzero means that we have builtin functions, and main is an int. */ |
574a6990 | 227 | |
228 | int flag_hosted = 1; | |
229 | ||
574a6990 | 230 | |
231 | /* ObjC language option variables. */ | |
232 | ||
233 | ||
574a6990 | 234 | /* Tells the compiler that this is a special run. Do not perform any |
235 | compiling, instead we are to test some platform dependent features | |
236 | and output a C header file with appropriate definitions. */ | |
237 | ||
238 | int print_struct_values; | |
239 | ||
f0b5f617 | 240 | /* Tells the compiler what is the constant string class for ObjC. */ |
574a6990 | 241 | |
242 | const char *constant_string_class_name; | |
243 | ||
574a6990 | 244 | |
245 | /* C++ language option variables. */ | |
246 | ||
247 | ||
574a6990 | 248 | /* Nonzero means generate separate instantiation control files and |
249 | juggle them at link time. */ | |
250 | ||
251 | int flag_use_repository; | |
252 | ||
6dcdb5de | 253 | /* The C++ dialect being used. C++98 is the default. */ |
0fe6eeac | 254 | |
6dcdb5de | 255 | enum cxx_dialect cxx_dialect = cxx98; |
0fe6eeac | 256 | |
9dcd0d49 | 257 | /* Maximum template instantiation depth. This limit exists to limit the |
54cf6eed | 258 | time it takes to notice excessively recursive template instantiations; |
259 | the default value of 1024 is likely to be in the next C++ standard. */ | |
574a6990 | 260 | |
9dcd0d49 | 261 | int max_tinst_depth = 1024; |
574a6990 | 262 | |
988fc1d1 | 263 | /* The elements of `ridpointers' are identifier nodes for the reserved |
264 | type names and storage classes. It is indexed by a RID_... value. */ | |
265 | tree *ridpointers; | |
266 | ||
e60a6f7b | 267 | tree (*make_fname_decl) (location_t, tree, int); |
9e5a737d | 268 | |
48d94ede | 269 | /* Nonzero means don't warn about problems that occur when the code is |
270 | executed. */ | |
271 | int c_inhibit_evaluation_warnings; | |
e78703c1 | 272 | |
93be21c0 | 273 | /* Whether we are building a boolean conversion inside |
274 | convert_for_assignment, or some other late binary operation. If | |
275 | build_binary_op is called for C (from code shared by C and C++) in | |
276 | this case, then the operands have already been folded and the | |
277 | result will not be folded again, so C_MAYBE_CONST_EXPR should not | |
278 | be generated. */ | |
279 | bool in_late_binary_op; | |
280 | ||
7f5f3953 | 281 | /* Whether lexing has been completed, so subsequent preprocessor |
282 | errors should use the compiler's input_location. */ | |
283 | bool done_lexing = false; | |
284 | ||
2c0e001b | 285 | /* Information about how a function name is generated. */ |
65b7f83f | 286 | struct fname_var_t |
287 | { | |
e99c3a1d | 288 | tree *const decl; /* pointer to the VAR_DECL. */ |
289 | const unsigned rid; /* RID number for the identifier. */ | |
290 | const int pretty; /* How pretty is it? */ | |
65b7f83f | 291 | }; |
292 | ||
2c0e001b | 293 | /* The three ways of getting then name of the current function. */ |
65b7f83f | 294 | |
295 | const struct fname_var_t fname_vars[] = | |
296 | { | |
2c0e001b | 297 | /* C99 compliant __func__, must be first. */ |
65b7f83f | 298 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
2c0e001b | 299 | /* GCC __FUNCTION__ compliant. */ |
65b7f83f | 300 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
2c0e001b | 301 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
65b7f83f | 302 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
303 | {NULL, 0, 0}, | |
304 | }; | |
305 | ||
79396169 | 306 | /* Global visibility options. */ |
307 | struct visibility_flags visibility_options; | |
308 | ||
a75b1c71 | 309 | static tree c_fully_fold_internal (tree expr, bool, bool *, bool *); |
2ca392fd | 310 | static tree check_case_value (tree); |
311 | static bool check_case_bounds (tree, tree, tree *, tree *); | |
be43ff5a | 312 | |
1cae46be | 313 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
314 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
315 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
316 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
5de92639 | 317 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
318 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
1cae46be | 319 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
bdb1f0d1 | 320 | static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); |
7bd95dfd | 321 | static tree handle_leaf_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 322 | static tree handle_always_inline_attribute (tree *, tree, tree, int, |
323 | bool *); | |
1b16fc45 | 324 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
325 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0cdd9887 | 326 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
10fc867f | 327 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 328 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
329 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
62eec3b4 | 330 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
331 | bool *); | |
1cae46be | 332 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
333 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
334 | int, bool *); | |
335 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
336 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
337 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
338 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
339 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
340 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
85c0a25c | 341 | static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); |
342 | static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); | |
1cae46be | 343 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); |
f4a30bd7 | 344 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
1cae46be | 345 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
346 | bool *); | |
347 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
348 | bool *); | |
349 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
350 | tree, int, bool *); | |
351 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
26d1c5ff | 352 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 353 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
354 | bool *); | |
355 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
fc09b200 | 356 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 357 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
358 | bool *); | |
359 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
360 | bool *); | |
361 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
362 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
363 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
8a8cdb8d | 364 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
365 | bool *); | |
bf6c8de0 | 366 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5c26b42 | 367 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
4a29c97c | 368 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
24470055 | 369 | static tree handle_target_attribute (tree *, tree, tree, int, bool *); |
46f8e3b0 | 370 | static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); |
48b14f50 | 371 | static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); |
8ce86007 | 372 | static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); |
1cae46be | 373 | |
d01f58f9 | 374 | static void check_function_nonnull (tree, int, tree *); |
1cae46be | 375 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
376 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
377 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
860251be | 378 | static int resort_field_decl_cmp (const void *, const void *); |
dbf6c367 | 379 | |
5c6e5756 | 380 | /* Reserved words. The third field is a mask: keywords are disabled |
381 | if they match the mask. | |
382 | ||
383 | Masks for languages: | |
384 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
385 | C --std=c99: D_CXXONLY | D_OBJC | |
386 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
387 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
388 | C++ --std=c0x: D_CONLY | D_OBJC | |
389 | ObjC++ is like C++ except that D_OBJC is not set | |
390 | ||
391 | If -fno-asm is used, D_ASM is added to the mask. If | |
392 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
393 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
b27e241e | 394 | In C with -Wc++-compat, we warn if D_CXXWARN is set. |
5c6e5756 | 395 | |
b27e241e | 396 | Note the complication of the D_CXX_OBJC keywords. These are |
397 | reserved words such as 'class'. In C++, 'class' is a reserved | |
398 | word. In Objective-C++ it is too. In Objective-C, it is a | |
399 | reserved word too, but only if it follows an '@' sign. | |
400 | */ | |
5c6e5756 | 401 | const struct c_common_resword c_common_reswords[] = |
402 | { | |
403 | { "_Bool", RID_BOOL, D_CONLY }, | |
404 | { "_Complex", RID_COMPLEX, 0 }, | |
c1800156 | 405 | { "_Imaginary", RID_IMAGINARY, D_CONLY }, |
5c6e5756 | 406 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, |
407 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
408 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
409 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
410 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
411 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
f80e7755 | 412 | { "_Static_assert", RID_STATIC_ASSERT, D_CONLY }, |
5c6e5756 | 413 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, |
414 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
415 | { "__alignof", RID_ALIGNOF, 0 }, | |
416 | { "__alignof__", RID_ALIGNOF, 0 }, | |
417 | { "__asm", RID_ASM, 0 }, | |
418 | { "__asm__", RID_ASM, 0 }, | |
419 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
420 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
421 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, | |
422 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, | |
423 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
424 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
425 | { "__complex", RID_COMPLEX, 0 }, | |
426 | { "__complex__", RID_COMPLEX, 0 }, | |
427 | { "__const", RID_CONST, 0 }, | |
428 | { "__const__", RID_CONST, 0 }, | |
429 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
430 | { "__extension__", RID_EXTENSION, 0 }, | |
431 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
432 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
433 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
434 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
435 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
436 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
437 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
438 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
439 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
6388cfe2 | 440 | { "__int128", RID_INT128, 0 }, |
5c6e5756 | 441 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, |
442 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
443 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
444 | { "__is_convertible_to", RID_IS_CONVERTIBLE_TO, D_CXXONLY }, | |
445 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, | |
446 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
447 | { "__is_pod", RID_IS_POD, D_CXXONLY }, | |
448 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
c1c67b4f | 449 | { "__is_standard_layout", RID_IS_STD_LAYOUT, D_CXXONLY }, |
450 | { "__is_trivial", RID_IS_TRIVIAL, D_CXXONLY }, | |
5c6e5756 | 451 | { "__is_union", RID_IS_UNION, D_CXXONLY }, |
5290e253 | 452 | { "__is_literal_type", RID_IS_LITERAL_TYPE, D_CXXONLY }, |
5c6e5756 | 453 | { "__imag", RID_IMAGPART, 0 }, |
454 | { "__imag__", RID_IMAGPART, 0 }, | |
455 | { "__inline", RID_INLINE, 0 }, | |
456 | { "__inline__", RID_INLINE, 0 }, | |
457 | { "__label__", RID_LABEL, 0 }, | |
458 | { "__null", RID_NULL, 0 }, | |
459 | { "__real", RID_REALPART, 0 }, | |
460 | { "__real__", RID_REALPART, 0 }, | |
461 | { "__restrict", RID_RESTRICT, 0 }, | |
462 | { "__restrict__", RID_RESTRICT, 0 }, | |
463 | { "__signed", RID_SIGNED, 0 }, | |
464 | { "__signed__", RID_SIGNED, 0 }, | |
465 | { "__thread", RID_THREAD, 0 }, | |
466 | { "__typeof", RID_TYPEOF, 0 }, | |
467 | { "__typeof__", RID_TYPEOF, 0 }, | |
468 | { "__volatile", RID_VOLATILE, 0 }, | |
469 | { "__volatile__", RID_VOLATILE, 0 }, | |
e463efd7 | 470 | { "alignof", RID_ALIGNOF, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 471 | { "asm", RID_ASM, D_ASM }, |
472 | { "auto", RID_AUTO, 0 }, | |
dbd982c9 | 473 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 474 | { "break", RID_BREAK, 0 }, |
475 | { "case", RID_CASE, 0 }, | |
51030405 | 476 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
5c6e5756 | 477 | { "char", RID_CHAR, 0 }, |
51030405 | 478 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
479 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
480 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 481 | { "const", RID_CONST, 0 }, |
17814aca | 482 | { "constexpr", RID_CONSTEXPR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 483 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, |
484 | { "continue", RID_CONTINUE, 0 }, | |
51030405 | 485 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
5c6e5756 | 486 | { "default", RID_DEFAULT, 0 }, |
51030405 | 487 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 488 | { "do", RID_DO, 0 }, |
489 | { "double", RID_DOUBLE, 0 }, | |
490 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
491 | { "else", RID_ELSE, 0 }, | |
492 | { "enum", RID_ENUM, 0 }, | |
51030405 | 493 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
494 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 495 | { "extern", RID_EXTERN, 0 }, |
51030405 | 496 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 497 | { "float", RID_FLOAT, 0 }, |
498 | { "for", RID_FOR, 0 }, | |
51030405 | 499 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 500 | { "goto", RID_GOTO, 0 }, |
501 | { "if", RID_IF, 0 }, | |
502 | { "inline", RID_INLINE, D_EXT89 }, | |
503 | { "int", RID_INT, 0 }, | |
504 | { "long", RID_LONG, 0 }, | |
505 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
51030405 | 506 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
507 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
98fe9664 | 508 | { "noexcept", RID_NOEXCEPT, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
6fe11077 | 509 | { "nullptr", RID_NULLPTR, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
51030405 | 510 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, |
511 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
512 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
513 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 514 | { "register", RID_REGISTER, 0 }, |
515 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
516 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
517 | { "return", RID_RETURN, 0 }, | |
518 | { "short", RID_SHORT, 0 }, | |
519 | { "signed", RID_SIGNED, 0 }, | |
520 | { "sizeof", RID_SIZEOF, 0 }, | |
521 | { "static", RID_STATIC, 0 }, | |
522 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
523 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, | |
524 | { "struct", RID_STRUCT, 0 }, | |
525 | { "switch", RID_SWITCH, 0 }, | |
51030405 | 526 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
527 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
528 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, | |
529 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
530 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 531 | { "typedef", RID_TYPEDEF, 0 }, |
51030405 | 532 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
533 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 534 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
535 | { "union", RID_UNION, 0 }, | |
536 | { "unsigned", RID_UNSIGNED, 0 }, | |
51030405 | 537 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
538 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 539 | { "void", RID_VOID, 0 }, |
540 | { "volatile", RID_VOLATILE, 0 }, | |
541 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
542 | { "while", RID_WHILE, 0 }, | |
543 | /* These Objective-C keywords are recognized only immediately after | |
544 | an '@'. */ | |
545 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
546 | { "defs", RID_AT_DEFS, D_OBJC }, | |
547 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
548 | { "end", RID_AT_END, D_OBJC }, | |
549 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
550 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
551 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
552 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
553 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
554 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
069761fb | 555 | { "optional", RID_AT_OPTIONAL, D_OBJC }, |
556 | { "required", RID_AT_REQUIRED, D_OBJC }, | |
86c110ac | 557 | { "property", RID_AT_PROPERTY, D_OBJC }, |
4a8875ed | 558 | { "package", RID_AT_PACKAGE, D_OBJC }, |
e1f293c0 | 559 | { "synthesize", RID_AT_SYNTHESIZE, D_OBJC }, |
560 | { "dynamic", RID_AT_DYNAMIC, D_OBJC }, | |
5c6e5756 | 561 | /* These are recognized only in protocol-qualifier context |
562 | (see above) */ | |
563 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
564 | { "byref", RID_BYREF, D_OBJC }, | |
565 | { "in", RID_IN, D_OBJC }, | |
566 | { "inout", RID_INOUT, D_OBJC }, | |
567 | { "oneway", RID_ONEWAY, D_OBJC }, | |
568 | { "out", RID_OUT, D_OBJC }, | |
86c110ac | 569 | /* These are recognized inside a property attribute list */ |
7590f0e5 | 570 | { "assign", RID_ASSIGN, D_OBJC }, |
571 | { "copy", RID_COPY, D_OBJC }, | |
86c110ac | 572 | { "getter", RID_GETTER, D_OBJC }, |
7590f0e5 | 573 | { "nonatomic", RID_NONATOMIC, D_OBJC }, |
574 | { "readonly", RID_READONLY, D_OBJC }, | |
575 | { "readwrite", RID_READWRITE, D_OBJC }, | |
576 | { "retain", RID_RETAIN, D_OBJC }, | |
86c110ac | 577 | { "setter", RID_SETTER, D_OBJC }, |
5c6e5756 | 578 | }; |
579 | ||
580 | const unsigned int num_c_common_reswords = | |
581 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
582 | ||
f8e93a2e | 583 | /* Table of machine-independent attributes common to all C-like languages. */ |
584 | const struct attribute_spec c_common_attribute_table[] = | |
585 | { | |
ac86af5d | 586 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
587 | affects_type_identity } */ | |
f8e93a2e | 588 | { "packed", 0, 0, false, false, false, |
ac86af5d | 589 | handle_packed_attribute , false}, |
f8e93a2e | 590 | { "nocommon", 0, 0, true, false, false, |
ac86af5d | 591 | handle_nocommon_attribute, false}, |
f8e93a2e | 592 | { "common", 0, 0, true, false, false, |
ac86af5d | 593 | handle_common_attribute, false }, |
f8e93a2e | 594 | /* FIXME: logically, noreturn attributes should be listed as |
595 | "false, true, true" and apply to function types. But implementing this | |
596 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
597 | on a decl to identify non-returning functions to be located and fixed | |
598 | to check the function type instead. */ | |
599 | { "noreturn", 0, 0, true, false, false, | |
ac86af5d | 600 | handle_noreturn_attribute, false }, |
f8e93a2e | 601 | { "volatile", 0, 0, true, false, false, |
ac86af5d | 602 | handle_noreturn_attribute, false }, |
f8e93a2e | 603 | { "noinline", 0, 0, true, false, false, |
ac86af5d | 604 | handle_noinline_attribute, false }, |
bdb1f0d1 | 605 | { "noclone", 0, 0, true, false, false, |
ac86af5d | 606 | handle_noclone_attribute, false }, |
7bd95dfd | 607 | { "leaf", 0, 0, true, false, false, |
ac86af5d | 608 | handle_leaf_attribute, false }, |
f8e93a2e | 609 | { "always_inline", 0, 0, true, false, false, |
ac86af5d | 610 | handle_always_inline_attribute, false }, |
541e4101 | 611 | { "gnu_inline", 0, 0, true, false, false, |
ac86af5d | 612 | handle_gnu_inline_attribute, false }, |
1b16fc45 | 613 | { "artificial", 0, 0, true, false, false, |
ac86af5d | 614 | handle_artificial_attribute, false }, |
0cdd9887 | 615 | { "flatten", 0, 0, true, false, false, |
ac86af5d | 616 | handle_flatten_attribute, false }, |
f8e93a2e | 617 | { "used", 0, 0, true, false, false, |
ac86af5d | 618 | handle_used_attribute, false }, |
f8e93a2e | 619 | { "unused", 0, 0, false, false, false, |
ac86af5d | 620 | handle_unused_attribute, false }, |
62eec3b4 | 621 | { "externally_visible", 0, 0, true, false, false, |
ac86af5d | 622 | handle_externally_visible_attribute, false }, |
f8e93a2e | 623 | /* The same comments as for noreturn attributes apply to const ones. */ |
624 | { "const", 0, 0, true, false, false, | |
ac86af5d | 625 | handle_const_attribute, false }, |
f8e93a2e | 626 | { "transparent_union", 0, 0, false, false, false, |
ac86af5d | 627 | handle_transparent_union_attribute, false }, |
9af7fd5b | 628 | { "constructor", 0, 1, true, false, false, |
ac86af5d | 629 | handle_constructor_attribute, false }, |
9af7fd5b | 630 | { "destructor", 0, 1, true, false, false, |
ac86af5d | 631 | handle_destructor_attribute, false }, |
f8e93a2e | 632 | { "mode", 1, 1, false, true, false, |
ac86af5d | 633 | handle_mode_attribute, false }, |
f8e93a2e | 634 | { "section", 1, 1, true, false, false, |
ac86af5d | 635 | handle_section_attribute, false }, |
f8e93a2e | 636 | { "aligned", 0, 1, false, false, false, |
ac86af5d | 637 | handle_aligned_attribute, false }, |
f8e93a2e | 638 | { "weak", 0, 0, true, false, false, |
ac86af5d | 639 | handle_weak_attribute, false }, |
85c0a25c | 640 | { "ifunc", 1, 1, true, false, false, |
ac86af5d | 641 | handle_ifunc_attribute, false }, |
f8e93a2e | 642 | { "alias", 1, 1, true, false, false, |
ac86af5d | 643 | handle_alias_attribute, false }, |
f4a30bd7 | 644 | { "weakref", 0, 1, true, false, false, |
ac86af5d | 645 | handle_weakref_attribute, false }, |
f8e93a2e | 646 | { "no_instrument_function", 0, 0, true, false, false, |
ac86af5d | 647 | handle_no_instrument_function_attribute, |
648 | false }, | |
f8e93a2e | 649 | { "malloc", 0, 0, true, false, false, |
ac86af5d | 650 | handle_malloc_attribute, false }, |
26d1c5ff | 651 | { "returns_twice", 0, 0, true, false, false, |
ac86af5d | 652 | handle_returns_twice_attribute, false }, |
f8e93a2e | 653 | { "no_stack_limit", 0, 0, true, false, false, |
ac86af5d | 654 | handle_no_limit_stack_attribute, false }, |
f8e93a2e | 655 | { "pure", 0, 0, true, false, false, |
ac86af5d | 656 | handle_pure_attribute, false }, |
fc09b200 | 657 | /* For internal use (marking of builtins) only. The name contains space |
658 | to prevent its usage in source code. */ | |
659 | { "no vops", 0, 0, true, false, false, | |
ac86af5d | 660 | handle_novops_attribute, false }, |
45c4e798 | 661 | { "deprecated", 0, 1, false, false, false, |
ac86af5d | 662 | handle_deprecated_attribute, false }, |
f8e93a2e | 663 | { "vector_size", 1, 1, false, true, false, |
ac86af5d | 664 | handle_vector_size_attribute, false }, |
b212f378 | 665 | { "visibility", 1, 1, false, false, false, |
ac86af5d | 666 | handle_visibility_attribute, false }, |
24dfead4 | 667 | { "tls_model", 1, 1, true, false, false, |
ac86af5d | 668 | handle_tls_model_attribute, false }, |
dbf6c367 | 669 | { "nonnull", 0, -1, false, true, true, |
ac86af5d | 670 | handle_nonnull_attribute, false }, |
fa987697 | 671 | { "nothrow", 0, 0, true, false, false, |
ac86af5d | 672 | handle_nothrow_attribute, false }, |
673 | { "may_alias", 0, 0, false, true, false, NULL, false }, | |
7acb29a3 | 674 | { "cleanup", 1, 1, true, false, false, |
ac86af5d | 675 | handle_cleanup_attribute, false }, |
8a8cdb8d | 676 | { "warn_unused_result", 0, 0, false, true, true, |
ac86af5d | 677 | handle_warn_unused_result_attribute, false }, |
50ca527f | 678 | { "sentinel", 0, 1, false, true, true, |
ac86af5d | 679 | handle_sentinel_attribute, false }, |
b5c26b42 | 680 | /* For internal use (marking of builtins) only. The name contains space |
681 | to prevent its usage in source code. */ | |
682 | { "type generic", 0, 0, false, true, true, | |
ac86af5d | 683 | handle_type_generic_attribute, false }, |
4a29c97c | 684 | { "alloc_size", 1, 2, false, true, true, |
ac86af5d | 685 | handle_alloc_size_attribute, false }, |
5de92639 | 686 | { "cold", 0, 0, true, false, false, |
ac86af5d | 687 | handle_cold_attribute, false }, |
5de92639 | 688 | { "hot", 0, 0, true, false, false, |
ac86af5d | 689 | handle_hot_attribute, false }, |
10fc867f | 690 | { "warning", 1, 1, true, false, false, |
ac86af5d | 691 | handle_error_attribute, false }, |
10fc867f | 692 | { "error", 1, 1, true, false, false, |
ac86af5d | 693 | handle_error_attribute, false }, |
24470055 | 694 | { "target", 1, -1, true, false, false, |
ac86af5d | 695 | handle_target_attribute, false }, |
46f8e3b0 | 696 | { "optimize", 1, -1, true, false, false, |
ac86af5d | 697 | handle_optimize_attribute, false }, |
48b14f50 | 698 | { "no_split_stack", 0, 0, true, false, false, |
ac86af5d | 699 | handle_no_split_stack_attribute, false }, |
8ce86007 | 700 | /* For internal use (marking of builtins and runtime functions) only. |
701 | The name contains space to prevent its usage in source code. */ | |
702 | { "fn spec", 1, 1, false, true, true, | |
ac86af5d | 703 | handle_fnspec_attribute, false }, |
704 | { NULL, 0, 0, false, false, false, NULL, false } | |
f8e93a2e | 705 | }; |
706 | ||
707 | /* Give the specifications for the format attributes, used by C and all | |
d716ce75 | 708 | descendants. */ |
f8e93a2e | 709 | |
710 | const struct attribute_spec c_common_format_attribute_table[] = | |
711 | { | |
ac86af5d | 712 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
713 | affects_type_identity } */ | |
f8e93a2e | 714 | { "format", 3, 3, false, true, true, |
ac86af5d | 715 | handle_format_attribute, false }, |
f8e93a2e | 716 | { "format_arg", 1, 1, false, true, true, |
ac86af5d | 717 | handle_format_arg_attribute, false }, |
718 | { NULL, 0, 0, false, false, false, NULL, false } | |
f8e93a2e | 719 | }; |
720 | ||
6d5d708e | 721 | /* Return identifier for address space AS. */ |
34208e18 | 722 | |
6d5d708e | 723 | const char * |
724 | c_addr_space_name (addr_space_t as) | |
725 | { | |
34208e18 | 726 | int rid = RID_FIRST_ADDR_SPACE + as; |
727 | gcc_assert (ridpointers [rid]); | |
728 | return IDENTIFIER_POINTER (ridpointers [rid]); | |
6d5d708e | 729 | } |
730 | ||
2c0e001b | 731 | /* Push current bindings for the function name VAR_DECLS. */ |
f4e3c278 | 732 | |
733 | void | |
1cae46be | 734 | start_fname_decls (void) |
f4e3c278 | 735 | { |
65b7f83f | 736 | unsigned ix; |
737 | tree saved = NULL_TREE; | |
1cae46be | 738 | |
65b7f83f | 739 | for (ix = 0; fname_vars[ix].decl; ix++) |
740 | { | |
741 | tree decl = *fname_vars[ix].decl; | |
f4e3c278 | 742 | |
65b7f83f | 743 | if (decl) |
744 | { | |
7016c612 | 745 | saved = tree_cons (decl, build_int_cst (NULL_TREE, ix), saved); |
65b7f83f | 746 | *fname_vars[ix].decl = NULL_TREE; |
747 | } | |
748 | } | |
749 | if (saved || saved_function_name_decls) | |
750 | /* Normally they'll have been NULL, so only push if we've got a | |
751 | stack, or they are non-NULL. */ | |
752 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
753 | saved_function_name_decls); | |
754 | } | |
755 | ||
2363ef00 | 756 | /* Finish up the current bindings, adding them into the current function's |
757 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
758 | If there is no current function, we must be at file scope and no statements | |
759 | are involved. Pop the previous bindings. */ | |
65b7f83f | 760 | |
761 | void | |
1cae46be | 762 | finish_fname_decls (void) |
65b7f83f | 763 | { |
764 | unsigned ix; | |
2363ef00 | 765 | tree stmts = NULL_TREE; |
65b7f83f | 766 | tree stack = saved_function_name_decls; |
767 | ||
768 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
2363ef00 | 769 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
1cae46be | 770 | |
2363ef00 | 771 | if (stmts) |
65b7f83f | 772 | { |
2363ef00 | 773 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
5c423bd6 | 774 | |
2363ef00 | 775 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
776 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
81010c97 | 777 | |
bc2b76e0 | 778 | append_to_statement_list_force (*bodyp, &stmts); |
2363ef00 | 779 | *bodyp = stmts; |
65b7f83f | 780 | } |
1cae46be | 781 | |
65b7f83f | 782 | for (ix = 0; fname_vars[ix].decl; ix++) |
783 | *fname_vars[ix].decl = NULL_TREE; | |
1cae46be | 784 | |
65b7f83f | 785 | if (stack) |
f4e3c278 | 786 | { |
2c0e001b | 787 | /* We had saved values, restore them. */ |
65b7f83f | 788 | tree saved; |
789 | ||
790 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
791 | { | |
792 | tree decl = TREE_PURPOSE (saved); | |
793 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); | |
1cae46be | 794 | |
65b7f83f | 795 | *fname_vars[ix].decl = decl; |
796 | } | |
797 | stack = TREE_CHAIN (stack); | |
f4e3c278 | 798 | } |
65b7f83f | 799 | saved_function_name_decls = stack; |
800 | } | |
801 | ||
81010c97 | 802 | /* Return the text name of the current function, suitably prettified |
5fc7fa69 | 803 | by PRETTY_P. Return string must be freed by caller. */ |
65b7f83f | 804 | |
805 | const char * | |
1cae46be | 806 | fname_as_string (int pretty_p) |
65b7f83f | 807 | { |
9ad4bb1e | 808 | const char *name = "top level"; |
5fc7fa69 | 809 | char *namep; |
8115b8be | 810 | int vrb = 2, len; |
811 | cpp_string cstr = { 0, 0 }, strname; | |
9ad4bb1e | 812 | |
84166705 | 813 | if (!pretty_p) |
9ad4bb1e | 814 | { |
815 | name = ""; | |
816 | vrb = 0; | |
817 | } | |
818 | ||
819 | if (current_function_decl) | |
dc24ddbd | 820 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
9ad4bb1e | 821 | |
8115b8be | 822 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
5fc7fa69 | 823 | |
8115b8be | 824 | namep = XNEWVEC (char, len); |
825 | snprintf (namep, len, "\"%s\"", name); | |
826 | strname.text = (unsigned char *) namep; | |
827 | strname.len = len - 1; | |
5fc7fa69 | 828 | |
924bbf02 | 829 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
8115b8be | 830 | { |
831 | XDELETEVEC (namep); | |
832 | return (const char *) cstr.text; | |
5fc7fa69 | 833 | } |
5fc7fa69 | 834 | |
835 | return namep; | |
65b7f83f | 836 | } |
837 | ||
65b7f83f | 838 | /* Return the VAR_DECL for a const char array naming the current |
839 | function. If the VAR_DECL has not yet been created, create it | |
840 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
841 | ID is its name (unfortunately C and C++ hold the RID values of | |
842 | keywords in different places, so we can't derive RID from ID in | |
e3b80d49 | 843 | this language independent code. LOC is the location of the |
844 | function. */ | |
65b7f83f | 845 | |
846 | tree | |
e3b80d49 | 847 | fname_decl (location_t loc, unsigned int rid, tree id) |
65b7f83f | 848 | { |
849 | unsigned ix; | |
850 | tree decl = NULL_TREE; | |
851 | ||
852 | for (ix = 0; fname_vars[ix].decl; ix++) | |
853 | if (fname_vars[ix].rid == rid) | |
854 | break; | |
855 | ||
856 | decl = *fname_vars[ix].decl; | |
857 | if (!decl) | |
f4e3c278 | 858 | { |
2222b3c6 | 859 | /* If a tree is built here, it would normally have the lineno of |
860 | the current statement. Later this tree will be moved to the | |
861 | beginning of the function and this line number will be wrong. | |
862 | To avoid this problem set the lineno to 0 here; that prevents | |
7299020b | 863 | it from appearing in the RTL. */ |
2363ef00 | 864 | tree stmts; |
9a6486a6 | 865 | location_t saved_location = input_location; |
9a6486a6 | 866 | input_location = UNKNOWN_LOCATION; |
1cae46be | 867 | |
2363ef00 | 868 | stmts = push_stmt_list (); |
e60a6f7b | 869 | decl = (*make_fname_decl) (loc, id, fname_vars[ix].pretty); |
2363ef00 | 870 | stmts = pop_stmt_list (stmts); |
871 | if (!IS_EMPTY_STMT (stmts)) | |
872 | saved_function_name_decls | |
873 | = tree_cons (decl, stmts, saved_function_name_decls); | |
65b7f83f | 874 | *fname_vars[ix].decl = decl; |
9a6486a6 | 875 | input_location = saved_location; |
f4e3c278 | 876 | } |
65b7f83f | 877 | if (!ix && !current_function_decl) |
e3b80d49 | 878 | pedwarn (loc, 0, "%qD is not defined outside of function scope", decl); |
81010c97 | 879 | |
65b7f83f | 880 | return decl; |
f4e3c278 | 881 | } |
882 | ||
070236f0 | 883 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b0fc3e72 | 884 | |
885 | tree | |
1cae46be | 886 | fix_string_type (tree value) |
b0fc3e72 | 887 | { |
070236f0 | 888 | int length = TREE_STRING_LENGTH (value); |
889 | int nchars; | |
00d26680 | 890 | tree e_type, i_type, a_type; |
891 | ||
73be5127 | 892 | /* Compute the number of elements, for the array type. */ |
924bbf02 | 893 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
894 | { | |
895 | nchars = length; | |
896 | e_type = char_type_node; | |
897 | } | |
898 | else if (TREE_TYPE (value) == char16_array_type_node) | |
899 | { | |
900 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
901 | e_type = char16_type_node; | |
902 | } | |
903 | else if (TREE_TYPE (value) == char32_array_type_node) | |
904 | { | |
905 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
906 | e_type = char32_type_node; | |
907 | } | |
908 | else | |
909 | { | |
910 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
911 | e_type = wchar_type_node; | |
912 | } | |
b0fc3e72 | 913 | |
1d752508 | 914 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
915 | limit in C++98 Annex B is very large (65536) and is not normative, | |
916 | so we do not diagnose it (warn_overlength_strings is forced off | |
917 | in c_common_post_options). */ | |
918 | if (warn_overlength_strings) | |
919 | { | |
920 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
921 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
922 | if (nchars - 1 > nchars_max) | |
923 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
924 | separate the %d from the 'C'. 'ISO' should not be | |
925 | translated, but it may be moved after 'C%d' in languages | |
926 | where modifiers follow nouns. */ | |
21ca8540 | 927 | pedwarn (input_location, OPT_Woverlength_strings, |
8864917d | 928 | "string length %qd is greater than the length %qd " |
1d752508 | 929 | "ISO C%d compilers are required to support", |
930 | nchars - 1, nchars_max, relevant_std); | |
931 | } | |
82cfc7f7 | 932 | |
390be14e | 933 | /* Create the array type for the string constant. The ISO C++ |
934 | standard says that a string literal has type `const char[N]' or | |
935 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
936 | front-end with -Wwrite-strings. | |
937 | ??? We should change the type of an expression depending on the | |
938 | state of a warning flag. We should just be warning -- see how | |
939 | this is handled in the C++ front-end for the deprecated implicit | |
940 | conversion from string literals to `char*' or `wchar_t*'. | |
00d26680 | 941 | |
942 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
943 | array type being the unqualified version of that type. | |
944 | Therefore, if we are constructing an array of const char, we must | |
945 | construct the matching unqualified array type first. The C front | |
946 | end does not require this, but it does no harm, so we do it | |
947 | unconditionally. */ | |
7016c612 | 948 | i_type = build_index_type (build_int_cst (NULL_TREE, nchars - 1)); |
00d26680 | 949 | a_type = build_array_type (e_type, i_type); |
390be14e | 950 | if (c_dialect_cxx() || warn_write_strings) |
aebc8537 | 951 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
3a10ba35 | 952 | |
00d26680 | 953 | TREE_TYPE (value) = a_type; |
b8e3b7ad | 954 | TREE_CONSTANT (value) = 1; |
a814bad5 | 955 | TREE_READONLY (value) = 1; |
b0fc3e72 | 956 | TREE_STATIC (value) = 1; |
957 | return value; | |
958 | } | |
959 | \f | |
a75b1c71 | 960 | /* Fully fold EXPR, an expression that was not folded (beyond integer |
961 | constant expressions and null pointer constants) when being built | |
962 | up. If IN_INIT, this is in a static initializer and certain | |
963 | changes are made to the folding done. Clear *MAYBE_CONST if | |
964 | MAYBE_CONST is not NULL and EXPR is definitely not a constant | |
965 | expression because it contains an evaluated operator (in C99) or an | |
966 | operator outside of sizeof returning an integer constant (in C90) | |
967 | not permitted in constant expressions, or because it contains an | |
968 | evaluated arithmetic overflow. (*MAYBE_CONST should typically be | |
969 | set to true by callers before calling this function.) Return the | |
970 | folded expression. Function arguments have already been folded | |
971 | before calling this function, as have the contents of SAVE_EXPR, | |
972 | TARGET_EXPR, BIND_EXPR, VA_ARG_EXPR, OBJ_TYPE_REF and | |
973 | C_MAYBE_CONST_EXPR. */ | |
974 | ||
975 | tree | |
976 | c_fully_fold (tree expr, bool in_init, bool *maybe_const) | |
977 | { | |
978 | tree ret; | |
c6418a4e | 979 | tree eptype = NULL_TREE; |
a75b1c71 | 980 | bool dummy = true; |
981 | bool maybe_const_itself = true; | |
389dd41b | 982 | location_t loc = EXPR_LOCATION (expr); |
a75b1c71 | 983 | |
984 | /* This function is not relevant to C++ because C++ folds while | |
985 | parsing, and may need changes to be correct for C++ when C++ | |
986 | stops folding while parsing. */ | |
987 | if (c_dialect_cxx ()) | |
988 | gcc_unreachable (); | |
989 | ||
990 | if (!maybe_const) | |
991 | maybe_const = &dummy; | |
c6418a4e | 992 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) |
993 | { | |
994 | eptype = TREE_TYPE (expr); | |
995 | expr = TREE_OPERAND (expr, 0); | |
996 | } | |
a75b1c71 | 997 | ret = c_fully_fold_internal (expr, in_init, maybe_const, |
998 | &maybe_const_itself); | |
c6418a4e | 999 | if (eptype) |
389dd41b | 1000 | ret = fold_convert_loc (loc, eptype, ret); |
a75b1c71 | 1001 | *maybe_const &= maybe_const_itself; |
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | /* Internal helper for c_fully_fold. EXPR and IN_INIT are as for | |
1006 | c_fully_fold. *MAYBE_CONST_OPERANDS is cleared because of operands | |
1007 | not permitted, while *MAYBE_CONST_ITSELF is cleared because of | |
1008 | arithmetic overflow (for C90, *MAYBE_CONST_OPERANDS is carried from | |
1009 | both evaluated and unevaluated subexpressions while | |
1010 | *MAYBE_CONST_ITSELF is carried from only evaluated | |
1011 | subexpressions). */ | |
1012 | ||
1013 | static tree | |
1014 | c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands, | |
1015 | bool *maybe_const_itself) | |
1016 | { | |
1017 | tree ret = expr; | |
1018 | enum tree_code code = TREE_CODE (expr); | |
1019 | enum tree_code_class kind = TREE_CODE_CLASS (code); | |
1020 | location_t loc = EXPR_LOCATION (expr); | |
1021 | tree op0, op1, op2, op3; | |
1022 | tree orig_op0, orig_op1, orig_op2; | |
1023 | bool op0_const = true, op1_const = true, op2_const = true; | |
1024 | bool op0_const_self = true, op1_const_self = true, op2_const_self = true; | |
1025 | bool nowarning = TREE_NO_WARNING (expr); | |
672d914b | 1026 | int unused_p; |
a75b1c71 | 1027 | |
1028 | /* This function is not relevant to C++ because C++ folds while | |
1029 | parsing, and may need changes to be correct for C++ when C++ | |
1030 | stops folding while parsing. */ | |
1031 | if (c_dialect_cxx ()) | |
1032 | gcc_unreachable (); | |
1033 | ||
1034 | /* Constants, declarations, statements, errors, SAVE_EXPRs and | |
1035 | anything else not counted as an expression cannot usefully be | |
1036 | folded further at this point. */ | |
1037 | if (!IS_EXPR_CODE_CLASS (kind) | |
1038 | || kind == tcc_statement | |
1039 | || code == SAVE_EXPR) | |
1040 | return expr; | |
1041 | ||
1042 | /* Operands of variable-length expressions (function calls) have | |
1043 | already been folded, as have __builtin_* function calls, and such | |
1044 | expressions cannot occur in constant expressions. */ | |
1045 | if (kind == tcc_vl_exp) | |
1046 | { | |
1047 | *maybe_const_operands = false; | |
1048 | ret = fold (expr); | |
1049 | goto out; | |
1050 | } | |
1051 | ||
1052 | if (code == C_MAYBE_CONST_EXPR) | |
1053 | { | |
1054 | tree pre = C_MAYBE_CONST_EXPR_PRE (expr); | |
1055 | tree inner = C_MAYBE_CONST_EXPR_EXPR (expr); | |
1056 | if (C_MAYBE_CONST_EXPR_NON_CONST (expr)) | |
1057 | *maybe_const_operands = false; | |
1058 | if (C_MAYBE_CONST_EXPR_INT_OPERANDS (expr)) | |
1059 | *maybe_const_itself = false; | |
1060 | if (pre && !in_init) | |
1061 | ret = build2 (COMPOUND_EXPR, TREE_TYPE (expr), pre, inner); | |
1062 | else | |
1063 | ret = inner; | |
1064 | goto out; | |
1065 | } | |
1066 | ||
1067 | /* Assignment, increment, decrement, function call and comma | |
1068 | operators, and statement expressions, cannot occur in constant | |
1069 | expressions if evaluated / outside of sizeof. (Function calls | |
1070 | were handled above, though VA_ARG_EXPR is treated like a function | |
1071 | call here, and statement expressions are handled through | |
1072 | C_MAYBE_CONST_EXPR to avoid folding inside them.) */ | |
1073 | switch (code) | |
1074 | { | |
1075 | case MODIFY_EXPR: | |
1076 | case PREDECREMENT_EXPR: | |
1077 | case PREINCREMENT_EXPR: | |
1078 | case POSTDECREMENT_EXPR: | |
1079 | case POSTINCREMENT_EXPR: | |
1080 | case COMPOUND_EXPR: | |
1081 | *maybe_const_operands = false; | |
1082 | break; | |
1083 | ||
1084 | case VA_ARG_EXPR: | |
1085 | case TARGET_EXPR: | |
1086 | case BIND_EXPR: | |
1087 | case OBJ_TYPE_REF: | |
1088 | *maybe_const_operands = false; | |
1089 | ret = fold (expr); | |
1090 | goto out; | |
1091 | ||
1092 | default: | |
1093 | break; | |
1094 | } | |
1095 | ||
1096 | /* Fold individual tree codes as appropriate. */ | |
1097 | switch (code) | |
1098 | { | |
1099 | case COMPOUND_LITERAL_EXPR: | |
1100 | /* Any non-constancy will have been marked in a containing | |
1101 | C_MAYBE_CONST_EXPR; there is no more folding to do here. */ | |
1102 | goto out; | |
1103 | ||
1104 | case COMPONENT_REF: | |
1105 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1106 | op1 = TREE_OPERAND (expr, 1); | |
1107 | op2 = TREE_OPERAND (expr, 2); | |
1108 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1109 | maybe_const_itself); | |
f59e3889 | 1110 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1111 | if (op0 != orig_op0) |
1112 | ret = build3 (COMPONENT_REF, TREE_TYPE (expr), op0, op1, op2); | |
1113 | if (ret != expr) | |
1114 | { | |
1115 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1116 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1117 | } | |
1118 | goto out; | |
1119 | ||
1120 | case ARRAY_REF: | |
1121 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1122 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1123 | op2 = TREE_OPERAND (expr, 2); | |
1124 | op3 = TREE_OPERAND (expr, 3); | |
1125 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1126 | maybe_const_itself); | |
f59e3889 | 1127 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1128 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, |
1129 | maybe_const_itself); | |
f59e3889 | 1130 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1131 | op1 = decl_constant_value_for_optimization (op1); |
1132 | if (op0 != orig_op0 || op1 != orig_op1) | |
1133 | ret = build4 (ARRAY_REF, TREE_TYPE (expr), op0, op1, op2, op3); | |
1134 | if (ret != expr) | |
1135 | { | |
1136 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1137 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1138 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1139 | } | |
1140 | ret = fold (ret); | |
1141 | goto out; | |
1142 | ||
1143 | case COMPOUND_EXPR: | |
1144 | case MODIFY_EXPR: | |
1145 | case PREDECREMENT_EXPR: | |
1146 | case PREINCREMENT_EXPR: | |
1147 | case POSTDECREMENT_EXPR: | |
1148 | case POSTINCREMENT_EXPR: | |
1149 | case PLUS_EXPR: | |
1150 | case MINUS_EXPR: | |
1151 | case MULT_EXPR: | |
1152 | case POINTER_PLUS_EXPR: | |
1153 | case TRUNC_DIV_EXPR: | |
1154 | case CEIL_DIV_EXPR: | |
1155 | case FLOOR_DIV_EXPR: | |
1156 | case TRUNC_MOD_EXPR: | |
1157 | case RDIV_EXPR: | |
1158 | case EXACT_DIV_EXPR: | |
1159 | case LSHIFT_EXPR: | |
1160 | case RSHIFT_EXPR: | |
1161 | case BIT_IOR_EXPR: | |
1162 | case BIT_XOR_EXPR: | |
1163 | case BIT_AND_EXPR: | |
1164 | case LT_EXPR: | |
1165 | case LE_EXPR: | |
1166 | case GT_EXPR: | |
1167 | case GE_EXPR: | |
1168 | case EQ_EXPR: | |
1169 | case NE_EXPR: | |
1170 | case COMPLEX_EXPR: | |
1171 | case TRUTH_AND_EXPR: | |
1172 | case TRUTH_OR_EXPR: | |
1173 | case TRUTH_XOR_EXPR: | |
1174 | case UNORDERED_EXPR: | |
1175 | case ORDERED_EXPR: | |
1176 | case UNLT_EXPR: | |
1177 | case UNLE_EXPR: | |
1178 | case UNGT_EXPR: | |
1179 | case UNGE_EXPR: | |
1180 | case UNEQ_EXPR: | |
1181 | /* Binary operations evaluating both arguments (increment and | |
1182 | decrement are binary internally in GCC). */ | |
1183 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1184 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1185 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1186 | maybe_const_itself); | |
f59e3889 | 1187 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1188 | if (code != MODIFY_EXPR |
1189 | && code != PREDECREMENT_EXPR | |
1190 | && code != PREINCREMENT_EXPR | |
1191 | && code != POSTDECREMENT_EXPR | |
1192 | && code != POSTINCREMENT_EXPR) | |
1193 | op0 = decl_constant_value_for_optimization (op0); | |
1194 | /* The RHS of a MODIFY_EXPR was fully folded when building that | |
1195 | expression for the sake of conversion warnings. */ | |
1196 | if (code != MODIFY_EXPR) | |
1197 | op1 = c_fully_fold_internal (op1, in_init, maybe_const_operands, | |
1198 | maybe_const_itself); | |
f59e3889 | 1199 | STRIP_TYPE_NOPS (op1); |
a75b1c71 | 1200 | op1 = decl_constant_value_for_optimization (op1); |
1201 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) | |
1202 | ret = in_init | |
389dd41b | 1203 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1204 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1205 | else |
1206 | ret = fold (expr); | |
672d914b | 1207 | if (TREE_OVERFLOW_P (ret) |
1208 | && !TREE_OVERFLOW_P (op0) | |
1209 | && !TREE_OVERFLOW_P (op1)) | |
1210 | overflow_warning (EXPR_LOCATION (expr), ret); | |
a75b1c71 | 1211 | goto out; |
1212 | ||
1213 | case INDIRECT_REF: | |
1214 | case FIX_TRUNC_EXPR: | |
1215 | case FLOAT_EXPR: | |
1216 | CASE_CONVERT: | |
2b19dfe4 | 1217 | case VIEW_CONVERT_EXPR: |
a75b1c71 | 1218 | case NON_LVALUE_EXPR: |
1219 | case NEGATE_EXPR: | |
1220 | case BIT_NOT_EXPR: | |
1221 | case TRUTH_NOT_EXPR: | |
1222 | case ADDR_EXPR: | |
1223 | case CONJ_EXPR: | |
1224 | case REALPART_EXPR: | |
1225 | case IMAGPART_EXPR: | |
1226 | /* Unary operations. */ | |
1227 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1228 | op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands, | |
1229 | maybe_const_itself); | |
f59e3889 | 1230 | STRIP_TYPE_NOPS (op0); |
a75b1c71 | 1231 | if (code != ADDR_EXPR && code != REALPART_EXPR && code != IMAGPART_EXPR) |
1232 | op0 = decl_constant_value_for_optimization (op0); | |
1233 | if (op0 != orig_op0 || in_init) | |
1234 | ret = in_init | |
389dd41b | 1235 | ? fold_build1_initializer_loc (loc, code, TREE_TYPE (expr), op0) |
1236 | : fold_build1_loc (loc, code, TREE_TYPE (expr), op0); | |
a75b1c71 | 1237 | else |
1238 | ret = fold (expr); | |
1239 | if (code == INDIRECT_REF | |
1240 | && ret != expr | |
1241 | && TREE_CODE (ret) == INDIRECT_REF) | |
1242 | { | |
1243 | TREE_READONLY (ret) = TREE_READONLY (expr); | |
1244 | TREE_SIDE_EFFECTS (ret) = TREE_SIDE_EFFECTS (expr); | |
1245 | TREE_THIS_VOLATILE (ret) = TREE_THIS_VOLATILE (expr); | |
1246 | } | |
672d914b | 1247 | switch (code) |
1248 | { | |
1249 | case FIX_TRUNC_EXPR: | |
1250 | case FLOAT_EXPR: | |
1251 | CASE_CONVERT: | |
1252 | /* Don't warn about explicit conversions. We will already | |
1253 | have warned about suspect implicit conversions. */ | |
1254 | break; | |
1255 | ||
1256 | default: | |
1257 | if (TREE_OVERFLOW_P (ret) && !TREE_OVERFLOW_P (op0)) | |
1258 | overflow_warning (EXPR_LOCATION (expr), ret); | |
1259 | break; | |
1260 | } | |
a75b1c71 | 1261 | goto out; |
1262 | ||
1263 | case TRUTH_ANDIF_EXPR: | |
1264 | case TRUTH_ORIF_EXPR: | |
1265 | /* Binary operations not necessarily evaluating both | |
1266 | arguments. */ | |
1267 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1268 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1269 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self); | |
f59e3889 | 1270 | STRIP_TYPE_NOPS (op0); |
672d914b | 1271 | |
1272 | unused_p = (op0 == (code == TRUTH_ANDIF_EXPR | |
1273 | ? truthvalue_false_node | |
1274 | : truthvalue_true_node)); | |
1275 | c_inhibit_evaluation_warnings += unused_p; | |
a75b1c71 | 1276 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self); |
f59e3889 | 1277 | STRIP_TYPE_NOPS (op1); |
672d914b | 1278 | c_inhibit_evaluation_warnings -= unused_p; |
1279 | ||
a75b1c71 | 1280 | if (op0 != orig_op0 || op1 != orig_op1 || in_init) |
1281 | ret = in_init | |
389dd41b | 1282 | ? fold_build2_initializer_loc (loc, code, TREE_TYPE (expr), op0, op1) |
1283 | : fold_build2_loc (loc, code, TREE_TYPE (expr), op0, op1); | |
a75b1c71 | 1284 | else |
1285 | ret = fold (expr); | |
1286 | *maybe_const_operands &= op0_const; | |
1287 | *maybe_const_itself &= op0_const_self; | |
1288 | if (!(flag_isoc99 | |
1289 | && op0_const | |
1290 | && op0_const_self | |
1291 | && (code == TRUTH_ANDIF_EXPR | |
1292 | ? op0 == truthvalue_false_node | |
1293 | : op0 == truthvalue_true_node))) | |
1294 | *maybe_const_operands &= op1_const; | |
1295 | if (!(op0_const | |
1296 | && op0_const_self | |
1297 | && (code == TRUTH_ANDIF_EXPR | |
1298 | ? op0 == truthvalue_false_node | |
1299 | : op0 == truthvalue_true_node))) | |
1300 | *maybe_const_itself &= op1_const_self; | |
1301 | goto out; | |
1302 | ||
1303 | case COND_EXPR: | |
1304 | orig_op0 = op0 = TREE_OPERAND (expr, 0); | |
1305 | orig_op1 = op1 = TREE_OPERAND (expr, 1); | |
1306 | orig_op2 = op2 = TREE_OPERAND (expr, 2); | |
1307 | op0 = c_fully_fold_internal (op0, in_init, &op0_const, &op0_const_self); | |
672d914b | 1308 | |
f59e3889 | 1309 | STRIP_TYPE_NOPS (op0); |
672d914b | 1310 | c_inhibit_evaluation_warnings += (op0 == truthvalue_false_node); |
a75b1c71 | 1311 | op1 = c_fully_fold_internal (op1, in_init, &op1_const, &op1_const_self); |
f59e3889 | 1312 | STRIP_TYPE_NOPS (op1); |
672d914b | 1313 | c_inhibit_evaluation_warnings -= (op0 == truthvalue_false_node); |
1314 | ||
1315 | c_inhibit_evaluation_warnings += (op0 == truthvalue_true_node); | |
a75b1c71 | 1316 | op2 = c_fully_fold_internal (op2, in_init, &op2_const, &op2_const_self); |
f59e3889 | 1317 | STRIP_TYPE_NOPS (op2); |
672d914b | 1318 | c_inhibit_evaluation_warnings -= (op0 == truthvalue_true_node); |
1319 | ||
a75b1c71 | 1320 | if (op0 != orig_op0 || op1 != orig_op1 || op2 != orig_op2) |
389dd41b | 1321 | ret = fold_build3_loc (loc, code, TREE_TYPE (expr), op0, op1, op2); |
a75b1c71 | 1322 | else |
1323 | ret = fold (expr); | |
1324 | *maybe_const_operands &= op0_const; | |
1325 | *maybe_const_itself &= op0_const_self; | |
1326 | if (!(flag_isoc99 | |
1327 | && op0_const | |
1328 | && op0_const_self | |
1329 | && op0 == truthvalue_false_node)) | |
1330 | *maybe_const_operands &= op1_const; | |
1331 | if (!(op0_const | |
1332 | && op0_const_self | |
1333 | && op0 == truthvalue_false_node)) | |
1334 | *maybe_const_itself &= op1_const_self; | |
1335 | if (!(flag_isoc99 | |
1336 | && op0_const | |
1337 | && op0_const_self | |
1338 | && op0 == truthvalue_true_node)) | |
1339 | *maybe_const_operands &= op2_const; | |
1340 | if (!(op0_const | |
1341 | && op0_const_self | |
1342 | && op0 == truthvalue_true_node)) | |
1343 | *maybe_const_itself &= op2_const_self; | |
1344 | goto out; | |
1345 | ||
c6418a4e | 1346 | case EXCESS_PRECISION_EXPR: |
1347 | /* Each case where an operand with excess precision may be | |
1348 | encountered must remove the EXCESS_PRECISION_EXPR around | |
1349 | inner operands and possibly put one around the whole | |
1350 | expression or possibly convert to the semantic type (which | |
1351 | c_fully_fold does); we cannot tell at this stage which is | |
1352 | appropriate in any particular case. */ | |
1353 | gcc_unreachable (); | |
1354 | ||
a75b1c71 | 1355 | default: |
1356 | /* Various codes may appear through folding built-in functions | |
1357 | and their arguments. */ | |
1358 | goto out; | |
1359 | } | |
1360 | ||
1361 | out: | |
1362 | /* Some folding may introduce NON_LVALUE_EXPRs; all lvalue checks | |
1363 | have been done by this point, so remove them again. */ | |
1364 | nowarning |= TREE_NO_WARNING (ret); | |
1365 | STRIP_TYPE_NOPS (ret); | |
1366 | if (nowarning && !TREE_NO_WARNING (ret)) | |
1367 | { | |
1368 | if (!CAN_HAVE_LOCATION_P (ret)) | |
1369 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
1370 | TREE_NO_WARNING (ret) = 1; | |
1371 | } | |
1372 | if (ret != expr) | |
1373 | protected_set_expr_location (ret, loc); | |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | /* If not optimizing, EXP is not a VAR_DECL, or EXP has array type, | |
1378 | return EXP. Otherwise, return either EXP or its known constant | |
1379 | value (if it has one), but return EXP if EXP has mode BLKmode. ??? | |
1380 | Is the BLKmode test appropriate? */ | |
1381 | ||
1382 | tree | |
1383 | decl_constant_value_for_optimization (tree exp) | |
1384 | { | |
1385 | tree ret; | |
1386 | ||
1387 | /* This function is only used by C, for c_fully_fold and other | |
1388 | optimization, and may not be correct for C++. */ | |
1389 | if (c_dialect_cxx ()) | |
1390 | gcc_unreachable (); | |
1391 | ||
1392 | if (!optimize | |
1393 | || TREE_CODE (exp) != VAR_DECL | |
1394 | || TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1395 | || DECL_MODE (exp) == BLKmode) | |
1396 | return exp; | |
1397 | ||
1398 | ret = decl_constant_value (exp); | |
1399 | /* Avoid unwanted tree sharing between the initializer and current | |
1400 | function's body where the tree can be modified e.g. by the | |
1401 | gimplifier. */ | |
1402 | if (ret != exp && TREE_STATIC (exp)) | |
1403 | ret = unshare_expr (ret); | |
1404 | return ret; | |
1405 | } | |
1406 | ||
2a1736ed | 1407 | /* Print a warning if a constant expression had overflow in folding. |
1408 | Invoke this function on every expression that the language | |
1409 | requires to be a constant expression. | |
1410 | Note the ANSI C standard says it is erroneous for a | |
1411 | constant expression to overflow. */ | |
b2806639 | 1412 | |
1413 | void | |
1cae46be | 1414 | constant_expression_warning (tree value) |
07317e69 | 1415 | { |
48e1416a | 1416 | if (warn_overflow && pedantic |
07317e69 | 1417 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
1418 | || TREE_CODE (value) == FIXED_CST | |
1419 | || TREE_CODE (value) == VECTOR_CST | |
1420 | || TREE_CODE (value) == COMPLEX_CST) | |
1421 | && TREE_OVERFLOW (value)) | |
21ca8540 | 1422 | pedwarn (input_location, OPT_Woverflow, "overflow in constant expression"); |
07317e69 | 1423 | } |
1424 | ||
1425 | /* The same as above but print an unconditional error. */ | |
1426 | void | |
1427 | constant_expression_error (tree value) | |
b2806639 | 1428 | { |
837e1122 | 1429 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
9421ebb9 | 1430 | || TREE_CODE (value) == FIXED_CST |
886cfd4f | 1431 | || TREE_CODE (value) == VECTOR_CST |
837e1122 | 1432 | || TREE_CODE (value) == COMPLEX_CST) |
07317e69 | 1433 | && TREE_OVERFLOW (value)) |
1434 | error ("overflow in constant expression"); | |
2a1736ed | 1435 | } |
1436 | ||
f170d67f | 1437 | /* Print a warning if an expression had overflow in folding and its |
1438 | operands hadn't. | |
1439 | ||
2a1736ed | 1440 | Invoke this function on every expression that |
1441 | (1) appears in the source code, and | |
f170d67f | 1442 | (2) is a constant expression that overflowed, and |
2a1736ed | 1443 | (3) is not already checked by convert_and_check; |
f170d67f | 1444 | however, do not invoke this function on operands of explicit casts |
1445 | or when the expression is the result of an operator and any operand | |
1446 | already overflowed. */ | |
2a1736ed | 1447 | |
1448 | void | |
e60a6f7b | 1449 | overflow_warning (location_t loc, tree value) |
2a1736ed | 1450 | { |
48d94ede | 1451 | if (c_inhibit_evaluation_warnings != 0) |
1452 | return; | |
f170d67f | 1453 | |
1454 | switch (TREE_CODE (value)) | |
886cfd4f | 1455 | { |
f170d67f | 1456 | case INTEGER_CST: |
e60a6f7b | 1457 | warning_at (loc, OPT_Woverflow, "integer overflow in expression"); |
f170d67f | 1458 | break; |
48e1416a | 1459 | |
f170d67f | 1460 | case REAL_CST: |
e60a6f7b | 1461 | warning_at (loc, OPT_Woverflow, |
1462 | "floating point overflow in expression"); | |
f170d67f | 1463 | break; |
48e1416a | 1464 | |
9421ebb9 | 1465 | case FIXED_CST: |
e60a6f7b | 1466 | warning_at (loc, OPT_Woverflow, "fixed-point overflow in expression"); |
9421ebb9 | 1467 | break; |
1468 | ||
f170d67f | 1469 | case VECTOR_CST: |
e60a6f7b | 1470 | warning_at (loc, OPT_Woverflow, "vector overflow in expression"); |
f170d67f | 1471 | break; |
48e1416a | 1472 | |
f170d67f | 1473 | case COMPLEX_CST: |
1474 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
e60a6f7b | 1475 | warning_at (loc, OPT_Woverflow, |
1476 | "complex integer overflow in expression"); | |
f170d67f | 1477 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) |
e60a6f7b | 1478 | warning_at (loc, OPT_Woverflow, |
1479 | "complex floating point overflow in expression"); | |
f170d67f | 1480 | break; |
1481 | ||
1482 | default: | |
1483 | break; | |
886cfd4f | 1484 | } |
2a1736ed | 1485 | } |
1486 | ||
03033af4 | 1487 | /* Warn about uses of logical || / && operator in a context where it |
1488 | is likely that the bitwise equivalent was intended by the | |
1489 | programmer. We have seen an expression in which CODE is a binary | |
9c20c4fc | 1490 | operator used to combine expressions OP_LEFT and OP_RIGHT, which before folding |
1491 | had CODE_LEFT and CODE_RIGHT, into an expression of type TYPE. */ | |
b13d1547 | 1492 | void |
9c20c4fc | 1493 | warn_logical_operator (location_t location, enum tree_code code, tree type, |
48e1416a | 1494 | enum tree_code code_left, tree op_left, |
03033af4 | 1495 | enum tree_code ARG_UNUSED (code_right), tree op_right) |
b13d1547 | 1496 | { |
9c20c4fc | 1497 | int or_op = (code == TRUTH_ORIF_EXPR || code == TRUTH_OR_EXPR); |
1498 | int in0_p, in1_p, in_p; | |
1499 | tree low0, low1, low, high0, high1, high, lhs, rhs, tem; | |
1500 | bool strict_overflow_p = false; | |
1501 | ||
03033af4 | 1502 | if (code != TRUTH_ANDIF_EXPR |
1503 | && code != TRUTH_AND_EXPR | |
1504 | && code != TRUTH_ORIF_EXPR | |
1505 | && code != TRUTH_OR_EXPR) | |
1506 | return; | |
1507 | ||
1508 | /* Warn if &&/|| are being used in a context where it is | |
1509 | likely that the bitwise equivalent was intended by the | |
1510 | programmer. That is, an expression such as op && MASK | |
1511 | where op should not be any boolean expression, nor a | |
1512 | constant, and mask seems to be a non-boolean integer constant. */ | |
1513 | if (!truth_value_p (code_left) | |
1514 | && INTEGRAL_TYPE_P (TREE_TYPE (op_left)) | |
1515 | && !CONSTANT_CLASS_P (op_left) | |
1516 | && !TREE_NO_WARNING (op_left) | |
1517 | && TREE_CODE (op_right) == INTEGER_CST | |
1518 | && !integer_zerop (op_right) | |
1519 | && !integer_onep (op_right)) | |
b13d1547 | 1520 | { |
9c20c4fc | 1521 | if (or_op) |
03033af4 | 1522 | warning_at (location, OPT_Wlogical_op, "logical %<or%>" |
1523 | " applied to non-boolean constant"); | |
1524 | else | |
1525 | warning_at (location, OPT_Wlogical_op, "logical %<and%>" | |
1526 | " applied to non-boolean constant"); | |
1527 | TREE_NO_WARNING (op_left) = true; | |
9c20c4fc | 1528 | return; |
1529 | } | |
1530 | ||
1531 | /* We do not warn for constants because they are typical of macro | |
1532 | expansions that test for features. */ | |
1533 | if (CONSTANT_CLASS_P (op_left) || CONSTANT_CLASS_P (op_right)) | |
1534 | return; | |
1535 | ||
1536 | /* This warning only makes sense with logical operands. */ | |
1537 | if (!(truth_value_p (TREE_CODE (op_left)) | |
1538 | || INTEGRAL_TYPE_P (TREE_TYPE (op_left))) | |
1539 | || !(truth_value_p (TREE_CODE (op_right)) | |
1540 | || INTEGRAL_TYPE_P (TREE_TYPE (op_right)))) | |
1541 | return; | |
1542 | ||
1543 | lhs = make_range (op_left, &in0_p, &low0, &high0, &strict_overflow_p); | |
1544 | rhs = make_range (op_right, &in1_p, &low1, &high1, &strict_overflow_p); | |
1545 | ||
1546 | if (lhs && TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) | |
1547 | lhs = C_MAYBE_CONST_EXPR_EXPR (lhs); | |
1548 | ||
1549 | if (rhs && TREE_CODE (rhs) == C_MAYBE_CONST_EXPR) | |
1550 | rhs = C_MAYBE_CONST_EXPR_EXPR (rhs); | |
48e1416a | 1551 | |
9c20c4fc | 1552 | /* If this is an OR operation, invert both sides; we will invert |
1553 | again at the end. */ | |
1554 | if (or_op) | |
1555 | in0_p = !in0_p, in1_p = !in1_p; | |
48e1416a | 1556 | |
9c20c4fc | 1557 | /* If both expressions are the same, if we can merge the ranges, and we |
0969aa9b | 1558 | can build the range test, return it or it inverted. */ |
1559 | if (lhs && rhs && operand_equal_p (lhs, rhs, 0) | |
9c20c4fc | 1560 | && merge_ranges (&in_p, &low, &high, in0_p, low0, high0, |
1561 | in1_p, low1, high1) | |
389dd41b | 1562 | && 0 != (tem = build_range_check (UNKNOWN_LOCATION, |
1563 | type, lhs, in_p, low, high))) | |
9c20c4fc | 1564 | { |
1565 | if (TREE_CODE (tem) != INTEGER_CST) | |
1566 | return; | |
1567 | ||
1568 | if (or_op) | |
1569 | warning_at (location, OPT_Wlogical_op, | |
1570 | "logical %<or%> " | |
1571 | "of collectively exhaustive tests is always true"); | |
1572 | else | |
1573 | warning_at (location, OPT_Wlogical_op, | |
1574 | "logical %<and%> " | |
1575 | "of mutually exclusive tests is always false"); | |
b13d1547 | 1576 | } |
1577 | } | |
1578 | ||
1579 | ||
bcf22371 | 1580 | /* Print a warning about casts that might indicate violation |
1581 | of strict aliasing rules if -Wstrict-aliasing is used and | |
1e31ff37 | 1582 | strict aliasing mode is in effect. OTYPE is the original |
1583 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
bcf22371 | 1584 | |
e6fa0ea6 | 1585 | bool |
1e31ff37 | 1586 | strict_aliasing_warning (tree otype, tree type, tree expr) |
bcf22371 | 1587 | { |
45bb3afb | 1588 | /* Strip pointer conversion chains and get to the correct original type. */ |
1589 | STRIP_NOPS (expr); | |
1590 | otype = TREE_TYPE (expr); | |
1591 | ||
f06537f2 | 1592 | if (!(flag_strict_aliasing |
1593 | && POINTER_TYPE_P (type) | |
1594 | && POINTER_TYPE_P (otype) | |
1595 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
1596 | /* If the type we are casting to is a ref-all pointer | |
1597 | dereferencing it is always valid. */ | |
1598 | || TYPE_REF_CAN_ALIAS_ALL (type)) | |
e6fa0ea6 | 1599 | return false; |
1600 | ||
1601 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
bcf22371 | 1602 | && (DECL_P (TREE_OPERAND (expr, 0)) |
e6fa0ea6 | 1603 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
bcf22371 | 1604 | { |
1605 | /* Casting the address of an object to non void pointer. Warn | |
1606 | if the cast breaks type based aliasing. */ | |
e6fa0ea6 | 1607 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
1608 | { | |
1609 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
1610 | "might break strict-aliasing rules"); | |
1611 | return true; | |
1612 | } | |
bcf22371 | 1613 | else |
1614 | { | |
48e1416a | 1615 | /* warn_strict_aliasing >= 3. This includes the default (3). |
e6fa0ea6 | 1616 | Only warn if the cast is dereferenced immediately. */ |
32c2fdea | 1617 | alias_set_type set1 = |
e6fa0ea6 | 1618 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
32c2fdea | 1619 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
bcf22371 | 1620 | |
62d823d0 | 1621 | if (set1 != set2 && set2 != 0 |
1622 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
e6fa0ea6 | 1623 | { |
1624 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1625 | "pointer will break strict-aliasing rules"); | |
1626 | return true; | |
1627 | } | |
1628 | else if (warn_strict_aliasing == 2 | |
879f881c | 1629 | && !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 1630 | { |
1631 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1632 | "pointer might break strict-aliasing rules"); | |
1633 | return true; | |
1634 | } | |
bcf22371 | 1635 | } |
1636 | } | |
e6fa0ea6 | 1637 | else |
1638 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
1639 | { | |
1640 | /* At this level, warn for any conversions, even if an address is | |
1641 | not taken in the same statement. This will likely produce many | |
1642 | false positives, but could be useful to pinpoint problems that | |
1643 | are not revealed at higher levels. */ | |
32c2fdea | 1644 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
1645 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
1646 | if (!COMPLETE_TYPE_P (type) | |
879f881c | 1647 | || !alias_sets_must_conflict_p (set1, set2)) |
e6fa0ea6 | 1648 | { |
1649 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1650 | "pointer might break strict-aliasing rules"); | |
1651 | return true; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | return false; | |
bcf22371 | 1656 | } |
1657 | ||
3f08e399 | 1658 | /* Warn for unlikely, improbable, or stupid DECL declarations |
1659 | of `main'. */ | |
1660 | ||
1661 | void | |
1662 | check_main_parameter_types (tree decl) | |
1663 | { | |
1664 | tree args; | |
1665 | int argct = 0; | |
1666 | ||
1667 | for (args = TYPE_ARG_TYPES (TREE_TYPE (decl)); args; | |
1668 | args = TREE_CHAIN (args)) | |
1669 | { | |
1670 | tree type = args ? TREE_VALUE (args) : 0; | |
1671 | ||
7accad14 | 1672 | if (type == void_type_node || type == error_mark_node ) |
3f08e399 | 1673 | break; |
1674 | ||
1675 | ++argct; | |
1676 | switch (argct) | |
1677 | { | |
1678 | case 1: | |
1679 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
48e1416a | 1680 | pedwarn (input_location, OPT_Wmain, "first argument of %q+D should be %<int%>", |
23efcc02 | 1681 | decl); |
3f08e399 | 1682 | break; |
1683 | ||
1684 | case 2: | |
1685 | if (TREE_CODE (type) != POINTER_TYPE | |
1686 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1687 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1688 | != char_type_node)) | |
21ca8540 | 1689 | pedwarn (input_location, OPT_Wmain, "second argument of %q+D should be %<char **%>", |
23efcc02 | 1690 | decl); |
3f08e399 | 1691 | break; |
1692 | ||
1693 | case 3: | |
1694 | if (TREE_CODE (type) != POINTER_TYPE | |
1695 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1696 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1697 | != char_type_node)) | |
21ca8540 | 1698 | pedwarn (input_location, OPT_Wmain, "third argument of %q+D should probably be " |
23efcc02 | 1699 | "%<char **%>", decl); |
3f08e399 | 1700 | break; |
1701 | } | |
1702 | } | |
1703 | ||
1704 | /* It is intentional that this message does not mention the third | |
1705 | argument because it's only mentioned in an appendix of the | |
1706 | standard. */ | |
1707 | if (argct > 0 && (argct < 2 || argct > 3)) | |
21ca8540 | 1708 | pedwarn (input_location, OPT_Wmain, "%q+D takes only zero or two arguments", decl); |
3f08e399 | 1709 | } |
1710 | ||
ed7c4e62 | 1711 | /* True if pointers to distinct types T1 and T2 can be converted to |
1712 | each other without an explicit cast. Only returns true for opaque | |
1713 | vector types. */ | |
1714 | bool | |
1715 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
1716 | { | |
1717 | if (TREE_CODE (t1) == VECTOR_TYPE && TREE_CODE (t2) == VECTOR_TYPE | |
8d125f7d | 1718 | && (TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ed7c4e62 | 1719 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
1720 | return true; | |
1721 | ||
1722 | return false; | |
1723 | } | |
1724 | ||
546c4794 | 1725 | /* True if vector types T1 and T2 can be converted to each other |
1726 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
1727 | can only be converted with -flax-vector-conversions yet that is not | |
1728 | in effect, emit a note telling the user about that option if such | |
1729 | a note has not previously been emitted. */ | |
1730 | bool | |
9f627b1a | 1731 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
8b4b9810 | 1732 | { |
546c4794 | 1733 | static bool emitted_lax_note = false; |
ae6db8ab | 1734 | bool convertible_lax; |
1735 | ||
8d125f7d | 1736 | if ((TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ae6db8ab | 1737 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
1738 | return true; | |
1739 | ||
1740 | convertible_lax = | |
1741 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
1742 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
1743 | TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
1744 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) | |
1745 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
546c4794 | 1746 | |
1747 | if (!convertible_lax || flag_lax_vector_conversions) | |
1748 | return convertible_lax; | |
1749 | ||
1750 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
29f51994 | 1751 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
546c4794 | 1752 | return true; |
1753 | ||
1754 | if (emit_lax_note && !emitted_lax_note) | |
1755 | { | |
1756 | emitted_lax_note = true; | |
5bcc316e | 1757 | inform (input_location, "use -flax-vector-conversions to permit " |
546c4794 | 1758 | "conversions between vectors with differing " |
1759 | "element types or numbers of subparts"); | |
1760 | } | |
1761 | ||
1762 | return false; | |
8b4b9810 | 1763 | } |
1764 | ||
2561cea2 | 1765 | /* This is a helper function of build_binary_op. |
1766 | ||
1767 | For certain operations if both args were extended from the same | |
1768 | smaller type, do the arithmetic in that type and then extend. | |
1769 | ||
1770 | BITWISE indicates a bitwise operation. | |
1771 | For them, this optimization is safe only if | |
1772 | both args are zero-extended or both are sign-extended. | |
1773 | Otherwise, we might change the result. | |
1774 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
48e1416a | 1775 | but calculated in (unsigned short) it would be (unsigned short)-1. |
2561cea2 | 1776 | */ |
1777 | tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
1778 | { | |
1779 | int unsigned0, unsigned1; | |
1780 | tree arg0, arg1; | |
1781 | int uns; | |
1782 | tree type; | |
1783 | ||
1784 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
1785 | excessive narrowing when we call get_narrower below. For | |
1786 | example, suppose that OP0 is of unsigned int extended | |
1787 | from signed char and that RESULT_TYPE is long long int. | |
1788 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
1789 | like | |
48e1416a | 1790 | |
2561cea2 | 1791 | (long long int) (unsigned int) signed_char |
1792 | ||
1793 | which get_narrower would narrow down to | |
48e1416a | 1794 | |
2561cea2 | 1795 | (unsigned int) signed char |
48e1416a | 1796 | |
2561cea2 | 1797 | If we do not cast OP0 first, get_narrower would return |
1798 | signed_char, which is inconsistent with the case of the | |
1799 | explicit cast. */ | |
1800 | op0 = convert (result_type, op0); | |
1801 | op1 = convert (result_type, op1); | |
1802 | ||
1803 | arg0 = get_narrower (op0, &unsigned0); | |
1804 | arg1 = get_narrower (op1, &unsigned1); | |
1805 | ||
1806 | /* UNS is 1 if the operation to be done is an unsigned one. */ | |
1807 | uns = TYPE_UNSIGNED (result_type); | |
1808 | ||
1809 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
1810 | but it *requires* conversion to FINAL_TYPE. */ | |
48e1416a | 1811 | |
2561cea2 | 1812 | if ((TYPE_PRECISION (TREE_TYPE (op0)) |
1813 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1814 | && TREE_TYPE (op0) != result_type) | |
1815 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
1816 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
1817 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
1818 | && TREE_TYPE (op1) != result_type) | |
1819 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
48e1416a | 1820 | |
2561cea2 | 1821 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ |
48e1416a | 1822 | |
2561cea2 | 1823 | /* For bitwise operations, signedness of nominal type |
1824 | does not matter. Consider only how operands were extended. */ | |
1825 | if (bitwise) | |
1826 | uns = unsigned0; | |
48e1416a | 1827 | |
2561cea2 | 1828 | /* Note that in all three cases below we refrain from optimizing |
1829 | an unsigned operation on sign-extended args. | |
1830 | That would not be valid. */ | |
48e1416a | 1831 | |
2561cea2 | 1832 | /* Both args variable: if both extended in same way |
1833 | from same width, do it in that width. | |
1834 | Do it unsigned if args were zero-extended. */ | |
1835 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
1836 | < TYPE_PRECISION (result_type)) | |
1837 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1838 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1839 | && unsigned0 == unsigned1 | |
1840 | && (unsigned0 || !uns)) | |
1841 | return c_common_signed_or_unsigned_type | |
1842 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
1843 | ||
1844 | else if (TREE_CODE (arg0) == INTEGER_CST | |
1845 | && (unsigned1 || !uns) | |
1846 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1847 | < TYPE_PRECISION (result_type)) | |
1848 | && (type | |
1849 | = c_common_signed_or_unsigned_type (unsigned1, | |
1850 | TREE_TYPE (arg1))) | |
1851 | && !POINTER_TYPE_P (type) | |
1852 | && int_fits_type_p (arg0, type)) | |
1853 | return type; | |
1854 | ||
1855 | else if (TREE_CODE (arg1) == INTEGER_CST | |
1856 | && (unsigned0 || !uns) | |
1857 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
1858 | < TYPE_PRECISION (result_type)) | |
1859 | && (type | |
1860 | = c_common_signed_or_unsigned_type (unsigned0, | |
1861 | TREE_TYPE (arg0))) | |
1862 | && !POINTER_TYPE_P (type) | |
1863 | && int_fits_type_p (arg1, type)) | |
1864 | return type; | |
1865 | ||
1866 | return result_type; | |
1867 | } | |
1868 | ||
d31d55f0 | 1869 | /* Warns if the conversion of EXPR to TYPE may alter a value. |
59dd8856 | 1870 | This is a helper function for warnings_for_convert_and_check. */ |
d31d55f0 | 1871 | |
1872 | static void | |
1873 | conversion_warning (tree type, tree expr) | |
1874 | { | |
1875 | bool give_warning = false; | |
1876 | ||
5b16c152 | 1877 | int i; |
1878 | const int expr_num_operands = TREE_OPERAND_LENGTH (expr); | |
27259707 | 1879 | tree expr_type = TREE_TYPE (expr); |
8637f1db | 1880 | location_t loc = EXPR_LOC_OR_HERE (expr); |
d31d55f0 | 1881 | |
7ee0d227 | 1882 | if (!warn_conversion && !warn_sign_conversion) |
1883 | return; | |
1884 | ||
5b16c152 | 1885 | /* If any operand is artificial, then this expression was generated |
1886 | by the compiler and we do not warn. */ | |
1887 | for (i = 0; i < expr_num_operands; i++) | |
1888 | { | |
1889 | tree op = TREE_OPERAND (expr, i); | |
7bdc5064 | 1890 | if (op && DECL_P (op) && DECL_ARTIFICIAL (op)) |
5b16c152 | 1891 | return; |
1892 | } | |
1893 | ||
27259707 | 1894 | switch (TREE_CODE (expr)) |
d31d55f0 | 1895 | { |
27259707 | 1896 | case EQ_EXPR: |
1897 | case NE_EXPR: | |
1898 | case LE_EXPR: | |
1899 | case GE_EXPR: | |
1900 | case LT_EXPR: | |
1901 | case GT_EXPR: | |
1902 | case TRUTH_ANDIF_EXPR: | |
1903 | case TRUTH_ORIF_EXPR: | |
1904 | case TRUTH_AND_EXPR: | |
1905 | case TRUTH_OR_EXPR: | |
1906 | case TRUTH_XOR_EXPR: | |
1907 | case TRUTH_NOT_EXPR: | |
1908 | /* Conversion from boolean to a signed:1 bit-field (which only | |
1909 | can hold the values 0 and -1) doesn't lose information - but | |
1910 | it does change the value. */ | |
48e1416a | 1911 | if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type)) |
200dd99c | 1912 | warning_at (loc, OPT_Wconversion, |
1913 | "conversion to %qT from boolean expression", type); | |
27259707 | 1914 | return; |
1915 | ||
1916 | case REAL_CST: | |
1917 | case INTEGER_CST: | |
1918 | ||
d31d55f0 | 1919 | /* Warn for real constant that is not an exact integer converted |
1920 | to integer type. */ | |
27259707 | 1921 | if (TREE_CODE (expr_type) == REAL_TYPE |
d31d55f0 | 1922 | && TREE_CODE (type) == INTEGER_TYPE) |
1923 | { | |
27259707 | 1924 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) |
d31d55f0 | 1925 | give_warning = true; |
1926 | } | |
da1fb07b | 1927 | /* Warn for an integer constant that does not fit into integer type. */ |
27259707 | 1928 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
d31d55f0 | 1929 | && TREE_CODE (type) == INTEGER_TYPE |
da1fb07b | 1930 | && !int_fits_type_p (expr, type)) |
1931 | { | |
48e1416a | 1932 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) |
27259707 | 1933 | && tree_int_cst_sgn (expr) < 0) |
200dd99c | 1934 | warning_at (loc, OPT_Wsign_conversion, "negative integer" |
1935 | " implicitly converted to unsigned type"); | |
27259707 | 1936 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) |
200dd99c | 1937 | warning_at (loc, OPT_Wsign_conversion, "conversion of unsigned" |
1938 | " constant value to negative integer"); | |
7ee0d227 | 1939 | else |
1940 | give_warning = true; | |
da1fb07b | 1941 | } |
d31d55f0 | 1942 | else if (TREE_CODE (type) == REAL_TYPE) |
1943 | { | |
1944 | /* Warn for an integer constant that does not fit into real type. */ | |
27259707 | 1945 | if (TREE_CODE (expr_type) == INTEGER_TYPE) |
d31d55f0 | 1946 | { |
1947 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
1948 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1949 | give_warning = true; | |
1950 | } | |
1951 | /* Warn for a real constant that does not fit into a smaller | |
1952 | real type. */ | |
27259707 | 1953 | else if (TREE_CODE (expr_type) == REAL_TYPE |
1954 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
d31d55f0 | 1955 | { |
1956 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
1957 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1958 | give_warning = true; | |
1959 | } | |
1960 | } | |
1961 | ||
1962 | if (give_warning) | |
200dd99c | 1963 | warning_at (loc, OPT_Wconversion, |
1964 | "conversion to %qT alters %qT constant value", | |
1965 | type, expr_type); | |
27259707 | 1966 | |
1967 | return; | |
1968 | ||
1969 | case COND_EXPR: | |
1970 | { | |
1971 | /* In case of COND_EXPR, if both operands are constants or | |
1972 | COND_EXPR, then we do not care about the type of COND_EXPR, | |
1973 | only about the conversion of each operand. */ | |
1974 | tree op1 = TREE_OPERAND (expr, 1); | |
1975 | tree op2 = TREE_OPERAND (expr, 2); | |
1976 | ||
48e1416a | 1977 | if ((TREE_CODE (op1) == REAL_CST || TREE_CODE (op1) == INTEGER_CST |
27259707 | 1978 | || TREE_CODE (op1) == COND_EXPR) |
1979 | && (TREE_CODE (op2) == REAL_CST || TREE_CODE (op2) == INTEGER_CST | |
1980 | || TREE_CODE (op2) == COND_EXPR)) | |
1981 | { | |
1982 | conversion_warning (type, op1); | |
1983 | conversion_warning (type, op2); | |
1984 | return; | |
1985 | } | |
1986 | /* Fall through. */ | |
1987 | } | |
1988 | ||
1989 | default: /* 'expr' is not a constant. */ | |
2561cea2 | 1990 | |
d31d55f0 | 1991 | /* Warn for real types converted to integer types. */ |
2561cea2 | 1992 | if (TREE_CODE (expr_type) == REAL_TYPE |
d31d55f0 | 1993 | && TREE_CODE (type) == INTEGER_TYPE) |
1994 | give_warning = true; | |
1995 | ||
2561cea2 | 1996 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
d31d55f0 | 1997 | && TREE_CODE (type) == INTEGER_TYPE) |
1998 | { | |
69609004 | 1999 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
f9d856a4 | 2000 | expr = get_unwidened (expr, 0); |
2561cea2 | 2001 | expr_type = TREE_TYPE (expr); |
69609004 | 2002 | |
2561cea2 | 2003 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
48e1416a | 2004 | if (TREE_CODE (expr) == BIT_AND_EXPR |
2005 | || TREE_CODE (expr) == BIT_IOR_EXPR | |
2561cea2 | 2006 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
2007 | { | |
27259707 | 2008 | /* If both args were extended from a shortest type, |
2009 | use that type if that is safe. */ | |
48e1416a | 2010 | expr_type = shorten_binary_op (expr_type, |
2011 | TREE_OPERAND (expr, 0), | |
2012 | TREE_OPERAND (expr, 1), | |
2561cea2 | 2013 | /* bitwise */1); |
2014 | ||
2561cea2 | 2015 | if (TREE_CODE (expr) == BIT_AND_EXPR) |
2016 | { | |
2017 | tree op0 = TREE_OPERAND (expr, 0); | |
2018 | tree op1 = TREE_OPERAND (expr, 1); | |
30de145b | 2019 | bool unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
2020 | bool unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
2021 | ||
2022 | /* If one of the operands is a non-negative constant | |
2023 | that fits in the target type, then the type of the | |
2024 | other operand does not matter. */ | |
2561cea2 | 2025 | if ((TREE_CODE (op0) == INTEGER_CST |
2026 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
2027 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
2028 | || (TREE_CODE (op1) == INTEGER_CST | |
27259707 | 2029 | && int_fits_type_p (op1, c_common_signed_type (type)) |
48e1416a | 2030 | && int_fits_type_p (op1, |
27259707 | 2031 | c_common_unsigned_type (type)))) |
2561cea2 | 2032 | return; |
30de145b | 2033 | /* If constant is unsigned and fits in the target |
2034 | type, then the result will also fit. */ | |
2035 | else if ((TREE_CODE (op0) == INTEGER_CST | |
48e1416a | 2036 | && unsigned0 |
30de145b | 2037 | && int_fits_type_p (op0, type)) |
2038 | || (TREE_CODE (op1) == INTEGER_CST | |
2039 | && unsigned1 | |
2040 | && int_fits_type_p (op1, type))) | |
2041 | return; | |
2561cea2 | 2042 | } |
2043 | } | |
d31d55f0 | 2044 | /* Warn for integer types converted to smaller integer types. */ |
48e1416a | 2045 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
7ee0d227 | 2046 | give_warning = true; |
2047 | ||
2048 | /* When they are the same width but different signedness, | |
2049 | then the value may change. */ | |
27259707 | 2050 | else if ((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
2561cea2 | 2051 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7ee0d227 | 2052 | /* Even when converted to a bigger type, if the type is |
2053 | unsigned but expr is signed, then negative values | |
2054 | will be changed. */ | |
2561cea2 | 2055 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
200dd99c | 2056 | warning_at (loc, OPT_Wsign_conversion, "conversion to %qT from %qT " |
2057 | "may change the sign of the result", | |
2058 | type, expr_type); | |
d31d55f0 | 2059 | } |
2060 | ||
2061 | /* Warn for integer types converted to real types if and only if | |
2062 | all the range of values of the integer type cannot be | |
2063 | represented by the real type. */ | |
2561cea2 | 2064 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
d31d55f0 | 2065 | && TREE_CODE (type) == REAL_TYPE) |
2066 | { | |
4c2cfa81 | 2067 | tree type_low_bound, type_high_bound; |
2068 | REAL_VALUE_TYPE real_low_bound, real_high_bound; | |
2069 | ||
2070 | /* Don't warn about char y = 0xff; float x = (int) y; */ | |
2071 | expr = get_unwidened (expr, 0); | |
2072 | expr_type = TREE_TYPE (expr); | |
2073 | ||
2074 | type_low_bound = TYPE_MIN_VALUE (expr_type); | |
2075 | type_high_bound = TYPE_MAX_VALUE (expr_type); | |
2076 | real_low_bound = real_value_from_int_cst (0, type_low_bound); | |
2077 | real_high_bound = real_value_from_int_cst (0, type_high_bound); | |
d31d55f0 | 2078 | |
2079 | if (!exact_real_truncate (TYPE_MODE (type), &real_low_bound) | |
2080 | || !exact_real_truncate (TYPE_MODE (type), &real_high_bound)) | |
2081 | give_warning = true; | |
2082 | } | |
2083 | ||
2084 | /* Warn for real types converted to smaller real types. */ | |
2561cea2 | 2085 | else if (TREE_CODE (expr_type) == REAL_TYPE |
d31d55f0 | 2086 | && TREE_CODE (type) == REAL_TYPE |
27259707 | 2087 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
d31d55f0 | 2088 | give_warning = true; |
2089 | ||
2090 | ||
2091 | if (give_warning) | |
200dd99c | 2092 | warning_at (loc, OPT_Wconversion, |
2093 | "conversion to %qT from %qT may alter its value", | |
2094 | type, expr_type); | |
d31d55f0 | 2095 | } |
2096 | } | |
2097 | ||
59dd8856 | 2098 | /* Produce warnings after a conversion. RESULT is the result of |
2099 | converting EXPR to TYPE. This is a helper function for | |
2100 | convert_and_check and cp_convert_and_check. */ | |
2a1736ed | 2101 | |
59dd8856 | 2102 | void |
2103 | warnings_for_convert_and_check (tree type, tree expr, tree result) | |
2a1736ed | 2104 | { |
da1fb07b | 2105 | if (TREE_CODE (expr) == INTEGER_CST |
2106 | && (TREE_CODE (type) == INTEGER_TYPE | |
2107 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
2108 | && !int_fits_type_p (expr, type)) | |
2109 | { | |
d31d55f0 | 2110 | /* Do not diagnose overflow in a constant expression merely |
2111 | because a conversion overflowed. */ | |
da1fb07b | 2112 | if (TREE_OVERFLOW (result)) |
eddad94a | 2113 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
2114 | ||
da1fb07b | 2115 | if (TYPE_UNSIGNED (type)) |
d31d55f0 | 2116 | { |
da1fb07b | 2117 | /* This detects cases like converting -129 or 256 to |
2118 | unsigned char. */ | |
2119 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
2120 | warning (OPT_Woverflow, | |
2121 | "large integer implicitly truncated to unsigned type"); | |
7ee0d227 | 2122 | else |
da1fb07b | 2123 | conversion_warning (type, expr); |
2124 | } | |
48e1416a | 2125 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
e0913805 | 2126 | warning (OPT_Woverflow, |
2127 | "overflow in implicit constant conversion"); | |
2128 | /* No warning for converting 0x80000000 to int. */ | |
2129 | else if (pedantic | |
2130 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
2131 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
2132 | != TYPE_PRECISION (type))) | |
2133 | warning (OPT_Woverflow, | |
2134 | "overflow in implicit constant conversion"); | |
2135 | ||
7ee0d227 | 2136 | else |
e0913805 | 2137 | conversion_warning (type, expr); |
2a1736ed | 2138 | } |
9421ebb9 | 2139 | else if ((TREE_CODE (result) == INTEGER_CST |
2140 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
da1fb07b | 2141 | warning (OPT_Woverflow, |
2142 | "overflow in implicit constant conversion"); | |
7ee0d227 | 2143 | else |
da1fb07b | 2144 | conversion_warning (type, expr); |
59dd8856 | 2145 | } |
2146 | ||
2147 | ||
2148 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
2149 | Invoke this function on every expression that is converted implicitly, | |
2150 | i.e. because of language rules and not because of an explicit cast. */ | |
2151 | ||
2152 | tree | |
2153 | convert_and_check (tree type, tree expr) | |
2154 | { | |
2155 | tree result; | |
c6418a4e | 2156 | tree expr_for_warning; |
2157 | ||
2158 | /* Convert from a value with possible excess precision rather than | |
2159 | via the semantic type, but do not warn about values not fitting | |
2160 | exactly in the semantic type. */ | |
2161 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
2162 | { | |
2163 | tree orig_type = TREE_TYPE (expr); | |
2164 | expr = TREE_OPERAND (expr, 0); | |
2165 | expr_for_warning = convert (orig_type, expr); | |
2166 | if (orig_type == type) | |
2167 | return expr_for_warning; | |
2168 | } | |
2169 | else | |
2170 | expr_for_warning = expr; | |
59dd8856 | 2171 | |
2172 | if (TREE_TYPE (expr) == type) | |
2173 | return expr; | |
48e1416a | 2174 | |
59dd8856 | 2175 | result = convert (type, expr); |
2176 | ||
48d94ede | 2177 | if (c_inhibit_evaluation_warnings == 0 |
2178 | && !TREE_OVERFLOW_P (expr) | |
2179 | && result != error_mark_node) | |
c6418a4e | 2180 | warnings_for_convert_and_check (type, expr_for_warning, result); |
59dd8856 | 2181 | |
da1fb07b | 2182 | return result; |
b2806639 | 2183 | } |
2184 | \f | |
4e91a871 | 2185 | /* A node in a list that describes references to variables (EXPR), which are |
2186 | either read accesses if WRITER is zero, or write accesses, in which case | |
2187 | WRITER is the parent of EXPR. */ | |
2188 | struct tlist | |
2189 | { | |
2190 | struct tlist *next; | |
2191 | tree expr, writer; | |
2192 | }; | |
2193 | ||
2194 | /* Used to implement a cache the results of a call to verify_tree. We only | |
2195 | use this for SAVE_EXPRs. */ | |
2196 | struct tlist_cache | |
2197 | { | |
2198 | struct tlist_cache *next; | |
2199 | struct tlist *cache_before_sp; | |
2200 | struct tlist *cache_after_sp; | |
2201 | tree expr; | |
481c6ce6 | 2202 | }; |
2203 | ||
4e91a871 | 2204 | /* Obstack to use when allocating tlist structures, and corresponding |
2205 | firstobj. */ | |
2206 | static struct obstack tlist_obstack; | |
2207 | static char *tlist_firstobj = 0; | |
2208 | ||
2209 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
2210 | warnings. */ | |
2211 | static struct tlist *warned_ids; | |
2212 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
2213 | cache the results. */ | |
2214 | static struct tlist_cache *save_expr_cache; | |
2215 | ||
1cae46be | 2216 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
2217 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
2218 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
2219 | static int warning_candidate_p (tree); | |
79973b57 | 2220 | static bool candidate_equal_p (const_tree, const_tree); |
1cae46be | 2221 | static void warn_for_collisions (struct tlist *); |
2222 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
2223 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
481c6ce6 | 2224 | |
4e91a871 | 2225 | /* Create a new struct tlist and fill in its fields. */ |
2226 | static struct tlist * | |
1cae46be | 2227 | new_tlist (struct tlist *next, tree t, tree writer) |
4e91a871 | 2228 | { |
2229 | struct tlist *l; | |
9318f22c | 2230 | l = XOBNEW (&tlist_obstack, struct tlist); |
4e91a871 | 2231 | l->next = next; |
2232 | l->expr = t; | |
2233 | l->writer = writer; | |
2234 | return l; | |
2235 | } | |
2236 | ||
2237 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
2238 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
2239 | ||
2240 | static void | |
1cae46be | 2241 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
4e91a871 | 2242 | { |
2243 | while (add) | |
2244 | { | |
2245 | struct tlist *next = add->next; | |
84166705 | 2246 | if (!copy) |
4e91a871 | 2247 | add->next = *to; |
79973b57 | 2248 | if (!exclude_writer || !candidate_equal_p (add->writer, exclude_writer)) |
4e91a871 | 2249 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
2250 | add = next; | |
2251 | } | |
2252 | } | |
2253 | ||
2254 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
2255 | each variable that already exists in TO, no new node is added; however if | |
2256 | there is a write access recorded in ADD, and an occurrence on TO is only | |
2257 | a read access, then the occurrence in TO will be modified to record the | |
2258 | write. */ | |
481c6ce6 | 2259 | |
2260 | static void | |
1cae46be | 2261 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
4e91a871 | 2262 | { |
2263 | struct tlist **end = to; | |
2264 | ||
2265 | while (*end) | |
2266 | end = &(*end)->next; | |
2267 | ||
2268 | while (add) | |
2269 | { | |
2270 | int found = 0; | |
2271 | struct tlist *tmp2; | |
2272 | struct tlist *next = add->next; | |
2273 | ||
2274 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
79973b57 | 2275 | if (candidate_equal_p (tmp2->expr, add->expr)) |
4e91a871 | 2276 | { |
2277 | found = 1; | |
84166705 | 2278 | if (!tmp2->writer) |
4e91a871 | 2279 | tmp2->writer = add->writer; |
2280 | } | |
84166705 | 2281 | if (!found) |
4e91a871 | 2282 | { |
2283 | *end = copy ? add : new_tlist (NULL, add->expr, add->writer); | |
2284 | end = &(*end)->next; | |
2285 | *end = 0; | |
2286 | } | |
2287 | add = next; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
2292 | references in list LIST conflict with it, excluding reads if ONLY writers | |
2293 | is nonzero. */ | |
2294 | ||
2295 | static void | |
1cae46be | 2296 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
2297 | int only_writes) | |
4e91a871 | 2298 | { |
2299 | struct tlist *tmp; | |
2300 | ||
2301 | /* Avoid duplicate warnings. */ | |
2302 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
79973b57 | 2303 | if (candidate_equal_p (tmp->expr, written)) |
4e91a871 | 2304 | return; |
2305 | ||
2306 | while (list) | |
2307 | { | |
79973b57 | 2308 | if (candidate_equal_p (list->expr, written) |
2309 | && !candidate_equal_p (list->writer, writer) | |
2310 | && (!only_writes || list->writer)) | |
4e91a871 | 2311 | { |
2312 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
8637f1db | 2313 | warning_at (EXPR_LOC_OR_HERE (writer), |
6513b50d | 2314 | OPT_Wsequence_point, "operation on %qE may be undefined", |
2315 | list->expr); | |
4e91a871 | 2316 | } |
2317 | list = list->next; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | /* Given a list LIST of references to variables, find whether any of these | |
2322 | can cause conflicts due to missing sequence points. */ | |
2323 | ||
2324 | static void | |
1cae46be | 2325 | warn_for_collisions (struct tlist *list) |
4e91a871 | 2326 | { |
2327 | struct tlist *tmp; | |
1cae46be | 2328 | |
4e91a871 | 2329 | for (tmp = list; tmp; tmp = tmp->next) |
2330 | { | |
2331 | if (tmp->writer) | |
2332 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
2333 | } | |
2334 | } | |
2335 | ||
734c98be | 2336 | /* Return nonzero if X is a tree that can be verified by the sequence point |
4e91a871 | 2337 | warnings. */ |
2338 | static int | |
1cae46be | 2339 | warning_candidate_p (tree x) |
481c6ce6 | 2340 | { |
6ef8d12f | 2341 | if (DECL_P (x) && DECL_ARTIFICIAL (x)) |
2342 | return 0; | |
2343 | ||
2344 | /* VOID_TYPE_P (TREE_TYPE (x)) is workaround for cp/tree.c | |
79973b57 | 2345 | (lvalue_p) crash on TRY/CATCH. */ |
6ef8d12f | 2346 | if (TREE_TYPE (x) == NULL_TREE || VOID_TYPE_P (TREE_TYPE (x))) |
2347 | return 0; | |
2348 | ||
2349 | if (!lvalue_p (x)) | |
2350 | return 0; | |
2351 | ||
2352 | /* No point to track non-const calls, they will never satisfy | |
2353 | operand_equal_p. */ | |
2354 | if (TREE_CODE (x) == CALL_EXPR && (call_expr_flags (x) & ECF_CONST) == 0) | |
2355 | return 0; | |
2356 | ||
2357 | if (TREE_CODE (x) == STRING_CST) | |
2358 | return 0; | |
2359 | ||
2360 | return 1; | |
79973b57 | 2361 | } |
2362 | ||
2363 | /* Return nonzero if X and Y appear to be the same candidate (or NULL) */ | |
2364 | static bool | |
2365 | candidate_equal_p (const_tree x, const_tree y) | |
2366 | { | |
2367 | return (x == y) || (x && y && operand_equal_p (x, y, 0)); | |
4e91a871 | 2368 | } |
481c6ce6 | 2369 | |
4e91a871 | 2370 | /* Walk the tree X, and record accesses to variables. If X is written by the |
2371 | parent tree, WRITER is the parent. | |
2372 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
2373 | expression or its only operand forces a sequence point, then everything up | |
2374 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
2375 | in PNO_SP. | |
2376 | Once we return, we will have emitted warnings if any subexpression before | |
2377 | such a sequence point could be undefined. On a higher level, however, the | |
2378 | sequence point may not be relevant, and we'll merge the two lists. | |
2379 | ||
2380 | Example: (b++, a) + b; | |
2381 | The call that processes the COMPOUND_EXPR will store the increment of B | |
2382 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
2383 | processes the PLUS_EXPR will need to merge the two lists so that | |
2384 | eventually, all accesses end up on the same list (and we'll warn about the | |
2385 | unordered subexpressions b++ and b. | |
2386 | ||
2387 | A note on merging. If we modify the former example so that our expression | |
2388 | becomes | |
2389 | (b++, b) + a | |
2390 | care must be taken not simply to add all three expressions into the final | |
2391 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
2392 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
2393 | way, so that no more than one access to B is recorded. */ | |
481c6ce6 | 2394 | |
4e91a871 | 2395 | static void |
1cae46be | 2396 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
2397 | tree writer) | |
4e91a871 | 2398 | { |
2399 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
2400 | enum tree_code code; | |
ce45a448 | 2401 | enum tree_code_class cl; |
481c6ce6 | 2402 | |
e5b75768 | 2403 | /* X may be NULL if it is the operand of an empty statement expression |
2404 | ({ }). */ | |
2405 | if (x == NULL) | |
2406 | return; | |
2407 | ||
4e91a871 | 2408 | restart: |
2409 | code = TREE_CODE (x); | |
e916c70c | 2410 | cl = TREE_CODE_CLASS (code); |
481c6ce6 | 2411 | |
4e91a871 | 2412 | if (warning_candidate_p (x)) |
79973b57 | 2413 | *pno_sp = new_tlist (*pno_sp, x, writer); |
4e91a871 | 2414 | |
2415 | switch (code) | |
2416 | { | |
67b28e3e | 2417 | case CONSTRUCTOR: |
2418 | return; | |
2419 | ||
4e91a871 | 2420 | case COMPOUND_EXPR: |
2421 | case TRUTH_ANDIF_EXPR: | |
2422 | case TRUTH_ORIF_EXPR: | |
2423 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
2424 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
2425 | warn_for_collisions (tmp_nosp); | |
2426 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2427 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
2428 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
2429 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2430 | return; | |
2431 | ||
2432 | case COND_EXPR: | |
2433 | tmp_before = tmp_list2 = 0; | |
2434 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
2435 | warn_for_collisions (tmp_list2); | |
2436 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2437 | merge_tlist (pbefore_sp, tmp_list2, 1); | |
2438 | ||
2439 | tmp_list3 = tmp_nosp = 0; | |
2440 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
2441 | warn_for_collisions (tmp_nosp); | |
2442 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2443 | ||
2444 | tmp_list3 = tmp_list2 = 0; | |
2445 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
2446 | warn_for_collisions (tmp_list2); | |
2447 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2448 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
2449 | two first, to avoid warning for (a ? b++ : b++). */ | |
2450 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
2451 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2452 | return; | |
2453 | ||
481c6ce6 | 2454 | case PREDECREMENT_EXPR: |
2455 | case PREINCREMENT_EXPR: | |
2456 | case POSTDECREMENT_EXPR: | |
2457 | case POSTINCREMENT_EXPR: | |
4e91a871 | 2458 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
2459 | return; | |
2460 | ||
2461 | case MODIFY_EXPR: | |
2462 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
2463 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
2464 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
2465 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
2466 | in the RHS. Example: | |
2467 | *a = (a++, 2) | |
2468 | Despite the fact that the modification of "a" is in the before_sp | |
2469 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
2470 | We can handle this by adding the contents of tmp_list3 | |
2471 | to those of tmp_before, and redoing the collision warnings for that | |
2472 | list. */ | |
2473 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
2474 | warn_for_collisions (tmp_before); | |
2475 | /* Exclude the LHS itself here; we first have to merge it into the | |
2476 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
2477 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
2478 | as a write. */ | |
2479 | add_tlist (pno_sp, tmp_list3, x, 0); | |
2480 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
2481 | ||
2482 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2483 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
2484 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
2485 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
2486 | return; | |
481c6ce6 | 2487 | |
2488 | case CALL_EXPR: | |
4e91a871 | 2489 | /* We need to warn about conflicts among arguments and conflicts between |
2490 | args and the function address. Side effects of the function address, | |
2491 | however, are not ordered by the sequence point of the call. */ | |
c2f47e15 | 2492 | { |
2493 | call_expr_arg_iterator iter; | |
2494 | tree arg; | |
48e1416a | 2495 | tmp_before = tmp_nosp = 0; |
c2f47e15 | 2496 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); |
2497 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
2498 | { | |
2499 | tmp_list2 = tmp_list3 = 0; | |
2500 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
2501 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
2502 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
2503 | } | |
2504 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
2505 | warn_for_collisions (tmp_before); | |
2506 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
2507 | return; | |
2508 | } | |
481c6ce6 | 2509 | |
2510 | case TREE_LIST: | |
2511 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
2512 | while (x) | |
2513 | { | |
4e91a871 | 2514 | tmp_before = tmp_nosp = 0; |
2515 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
2516 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
2517 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
481c6ce6 | 2518 | x = TREE_CHAIN (x); |
2519 | } | |
4e91a871 | 2520 | return; |
481c6ce6 | 2521 | |
4e91a871 | 2522 | case SAVE_EXPR: |
2523 | { | |
2524 | struct tlist_cache *t; | |
2525 | for (t = save_expr_cache; t; t = t->next) | |
79973b57 | 2526 | if (candidate_equal_p (t->expr, x)) |
4e91a871 | 2527 | break; |
481c6ce6 | 2528 | |
84166705 | 2529 | if (!t) |
481c6ce6 | 2530 | { |
9318f22c | 2531 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
4e91a871 | 2532 | t->next = save_expr_cache; |
2533 | t->expr = x; | |
2534 | save_expr_cache = t; | |
2535 | ||
2536 | tmp_before = tmp_nosp = 0; | |
2537 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
2538 | warn_for_collisions (tmp_nosp); | |
2539 | ||
2540 | tmp_list3 = 0; | |
2541 | while (tmp_nosp) | |
2542 | { | |
2543 | struct tlist *t = tmp_nosp; | |
2544 | tmp_nosp = t->next; | |
2545 | merge_tlist (&tmp_list3, t, 0); | |
2546 | } | |
2547 | t->cache_before_sp = tmp_before; | |
2548 | t->cache_after_sp = tmp_list3; | |
481c6ce6 | 2549 | } |
4e91a871 | 2550 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
2551 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
2552 | return; | |
2553 | } | |
481c6ce6 | 2554 | |
012916cb | 2555 | case ADDR_EXPR: |
2556 | x = TREE_OPERAND (x, 0); | |
2557 | if (DECL_P (x)) | |
2558 | return; | |
2559 | writer = 0; | |
2560 | goto restart; | |
2561 | ||
ce45a448 | 2562 | default: |
2563 | /* For other expressions, simply recurse on their operands. | |
a0c938f0 | 2564 | Manual tail recursion for unary expressions. |
ce45a448 | 2565 | Other non-expressions need not be processed. */ |
2566 | if (cl == tcc_unary) | |
2567 | { | |
ce45a448 | 2568 | x = TREE_OPERAND (x, 0); |
2569 | writer = 0; | |
2570 | goto restart; | |
2571 | } | |
2572 | else if (IS_EXPR_CODE_CLASS (cl)) | |
2573 | { | |
2574 | int lp; | |
c2f47e15 | 2575 | int max = TREE_OPERAND_LENGTH (x); |
ce45a448 | 2576 | for (lp = 0; lp < max; lp++) |
2577 | { | |
2578 | tmp_before = tmp_nosp = 0; | |
2579 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
2580 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
2581 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2582 | } | |
2583 | } | |
2584 | return; | |
481c6ce6 | 2585 | } |
481c6ce6 | 2586 | } |
2587 | ||
974e2c0c | 2588 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
481c6ce6 | 2589 | points. */ |
2590 | ||
4b987fac | 2591 | DEBUG_FUNCTION void |
1cae46be | 2592 | verify_sequence_points (tree expr) |
481c6ce6 | 2593 | { |
4e91a871 | 2594 | struct tlist *before_sp = 0, *after_sp = 0; |
481c6ce6 | 2595 | |
4e91a871 | 2596 | warned_ids = 0; |
2597 | save_expr_cache = 0; | |
2598 | if (tlist_firstobj == 0) | |
481c6ce6 | 2599 | { |
4e91a871 | 2600 | gcc_obstack_init (&tlist_obstack); |
4fd61bc6 | 2601 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
481c6ce6 | 2602 | } |
2603 | ||
4e91a871 | 2604 | verify_tree (expr, &before_sp, &after_sp, 0); |
2605 | warn_for_collisions (after_sp); | |
2606 | obstack_free (&tlist_obstack, tlist_firstobj); | |
481c6ce6 | 2607 | } |
b0fc3e72 | 2608 | \f |
2609 | /* Validate the expression after `case' and apply default promotions. */ | |
2610 | ||
2ca392fd | 2611 | static tree |
1cae46be | 2612 | check_case_value (tree value) |
b0fc3e72 | 2613 | { |
2614 | if (value == NULL_TREE) | |
2615 | return value; | |
2616 | ||
b96dc121 | 2617 | if (TREE_CODE (value) == INTEGER_CST) |
2618 | /* Promote char or short to int. */ | |
2619 | value = perform_integral_promotions (value); | |
2620 | else if (value != error_mark_node) | |
b0fc3e72 | 2621 | { |
2622 | error ("case label does not reduce to an integer constant"); | |
2623 | value = error_mark_node; | |
2624 | } | |
b0fc3e72 | 2625 | |
6433f1c2 | 2626 | constant_expression_warning (value); |
2627 | ||
b0fc3e72 | 2628 | return value; |
2629 | } | |
2630 | \f | |
2ca392fd | 2631 | /* See if the case values LOW and HIGH are in the range of the original |
5c9dae64 | 2632 | type (i.e. before the default conversion to int) of the switch testing |
2ca392fd | 2633 | expression. |
2634 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
91275768 | 2635 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
2ca392fd | 2636 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
2637 | if the case is not a case range. | |
2638 | The caller has to make sure that we are not called with NULL for | |
5c9dae64 | 2639 | CASE_LOW_P (i.e. the default case). |
442e3cb9 | 2640 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
2ca392fd | 2641 | untouched) or false if the label is out of range. */ |
2642 | ||
2643 | static bool | |
2644 | check_case_bounds (tree type, tree orig_type, | |
2645 | tree *case_low_p, tree *case_high_p) | |
2646 | { | |
2647 | tree min_value, max_value; | |
2648 | tree case_low = *case_low_p; | |
2649 | tree case_high = case_high_p ? *case_high_p : case_low; | |
2650 | ||
2651 | /* If there was a problem with the original type, do nothing. */ | |
2652 | if (orig_type == error_mark_node) | |
2653 | return true; | |
2654 | ||
2655 | min_value = TYPE_MIN_VALUE (orig_type); | |
2656 | max_value = TYPE_MAX_VALUE (orig_type); | |
2657 | ||
2658 | /* Case label is less than minimum for type. */ | |
2659 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
2660 | && tree_int_cst_compare (case_high, min_value) < 0) | |
2661 | { | |
c3ceba8e | 2662 | warning (0, "case label value is less than minimum value for type"); |
2ca392fd | 2663 | return false; |
2664 | } | |
b27ac6b5 | 2665 | |
2ca392fd | 2666 | /* Case value is greater than maximum for type. */ |
2667 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
2668 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2669 | { | |
c3ceba8e | 2670 | warning (0, "case label value exceeds maximum value for type"); |
2ca392fd | 2671 | return false; |
2672 | } | |
2673 | ||
2674 | /* Saturate lower case label value to minimum. */ | |
2675 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
2676 | && tree_int_cst_compare (case_low, min_value) < 0) | |
2677 | { | |
c3ceba8e | 2678 | warning (0, "lower value in case label range" |
2ca392fd | 2679 | " less than minimum value for type"); |
2680 | case_low = min_value; | |
2681 | } | |
b27ac6b5 | 2682 | |
2ca392fd | 2683 | /* Saturate upper case label value to maximum. */ |
2684 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
2685 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2686 | { | |
c3ceba8e | 2687 | warning (0, "upper value in case label range" |
2ca392fd | 2688 | " exceeds maximum value for type"); |
2689 | case_high = max_value; | |
2690 | } | |
2691 | ||
2692 | if (*case_low_p != case_low) | |
2693 | *case_low_p = convert (type, case_low); | |
2694 | if (case_high_p && *case_high_p != case_high) | |
2695 | *case_high_p = convert (type, case_high); | |
2696 | ||
2697 | return true; | |
2698 | } | |
2699 | \f | |
b0fc3e72 | 2700 | /* Return an integer type with BITS bits of precision, |
2701 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
2702 | ||
2703 | tree | |
1cae46be | 2704 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b0fc3e72 | 2705 | { |
46375237 | 2706 | if (bits == TYPE_PRECISION (integer_type_node)) |
2707 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2708 | ||
bacde65a | 2709 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b0fc3e72 | 2710 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
2711 | ||
bacde65a | 2712 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b0fc3e72 | 2713 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
2714 | ||
bacde65a | 2715 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b0fc3e72 | 2716 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
2717 | ||
bacde65a | 2718 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b0fc3e72 | 2719 | return (unsignedp ? long_long_unsigned_type_node |
2720 | : long_long_integer_type_node); | |
2721 | ||
6388cfe2 | 2722 | if (int128_integer_type_node |
2723 | && bits == TYPE_PRECISION (int128_integer_type_node)) | |
2724 | return (unsignedp ? int128_unsigned_type_node | |
2725 | : int128_integer_type_node); | |
2726 | ||
f57fa2ea | 2727 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
2728 | return (unsignedp ? widest_unsigned_literal_type_node | |
2729 | : widest_integer_literal_type_node); | |
2730 | ||
bacde65a | 2731 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
2732 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2733 | ||
2734 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
2735 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2736 | ||
2737 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
2738 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2739 | ||
2740 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
2741 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2742 | ||
b0fc3e72 | 2743 | return 0; |
2744 | } | |
2745 | ||
9421ebb9 | 2746 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
2747 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
2748 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
2749 | ||
2750 | tree | |
2751 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
2752 | int unsignedp, int satp) | |
2753 | { | |
2754 | enum machine_mode mode; | |
2755 | if (ibit == 0) | |
2756 | mode = unsignedp ? UQQmode : QQmode; | |
2757 | else | |
2758 | mode = unsignedp ? UHAmode : HAmode; | |
2759 | ||
2760 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
2761 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
2762 | break; | |
2763 | ||
2764 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
2765 | { | |
2766 | sorry ("GCC cannot support operators with integer types and " | |
2767 | "fixed-point types that have too many integral and " | |
2768 | "fractional bits together"); | |
2769 | return 0; | |
2770 | } | |
2771 | ||
2772 | return c_common_type_for_mode (mode, satp); | |
2773 | } | |
2774 | ||
5b247e9f | 2775 | /* Used for communication between c_common_type_for_mode and |
2776 | c_register_builtin_type. */ | |
2777 | static GTY(()) tree registered_builtin_types; | |
2778 | ||
b0fc3e72 | 2779 | /* Return a data type that has machine mode MODE. |
2780 | If the mode is an integer, | |
9421ebb9 | 2781 | then UNSIGNEDP selects between signed and unsigned types. |
2782 | If the mode is a fixed-point mode, | |
2783 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b0fc3e72 | 2784 | |
2785 | tree | |
1cae46be | 2786 | c_common_type_for_mode (enum machine_mode mode, int unsignedp) |
b0fc3e72 | 2787 | { |
5b247e9f | 2788 | tree t; |
2789 | ||
46375237 | 2790 | if (mode == TYPE_MODE (integer_type_node)) |
2791 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2792 | ||
b0fc3e72 | 2793 | if (mode == TYPE_MODE (signed_char_type_node)) |
2794 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2795 | ||
2796 | if (mode == TYPE_MODE (short_integer_type_node)) | |
2797 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2798 | ||
b0fc3e72 | 2799 | if (mode == TYPE_MODE (long_integer_type_node)) |
2800 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2801 | ||
2802 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
2803 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2804 | ||
6388cfe2 | 2805 | if (int128_integer_type_node |
2806 | && mode == TYPE_MODE (int128_integer_type_node)) | |
2807 | return unsignedp ? int128_unsigned_type_node : int128_integer_type_node; | |
2808 | ||
f57fa2ea | 2809 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
44e9fa65 | 2810 | return unsignedp ? widest_unsigned_literal_type_node |
4ee9c684 | 2811 | : widest_integer_literal_type_node; |
f57fa2ea | 2812 | |
88ae7f04 | 2813 | if (mode == QImode) |
bacde65a | 2814 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
2815 | ||
88ae7f04 | 2816 | if (mode == HImode) |
bacde65a | 2817 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
2818 | ||
88ae7f04 | 2819 | if (mode == SImode) |
bacde65a | 2820 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
2821 | ||
88ae7f04 | 2822 | if (mode == DImode) |
bacde65a | 2823 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
2824 | ||
cc1cc1c7 | 2825 | #if HOST_BITS_PER_WIDE_INT >= 64 |
6274009c | 2826 | if (mode == TYPE_MODE (intTI_type_node)) |
2827 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
cc1cc1c7 | 2828 | #endif |
6274009c | 2829 | |
b0fc3e72 | 2830 | if (mode == TYPE_MODE (float_type_node)) |
2831 | return float_type_node; | |
2832 | ||
2833 | if (mode == TYPE_MODE (double_type_node)) | |
2834 | return double_type_node; | |
2835 | ||
2836 | if (mode == TYPE_MODE (long_double_type_node)) | |
2837 | return long_double_type_node; | |
2838 | ||
545c2bde | 2839 | if (mode == TYPE_MODE (void_type_node)) |
2840 | return void_type_node; | |
b27ac6b5 | 2841 | |
b0fc3e72 | 2842 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
61b9b73c | 2843 | return (unsignedp |
2844 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2845 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 2846 | |
2847 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
61b9b73c | 2848 | return (unsignedp |
2849 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2850 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b0fc3e72 | 2851 | |
0dfc45b5 | 2852 | if (COMPLEX_MODE_P (mode)) |
2853 | { | |
2854 | enum machine_mode inner_mode; | |
2855 | tree inner_type; | |
2856 | ||
2857 | if (mode == TYPE_MODE (complex_float_type_node)) | |
2858 | return complex_float_type_node; | |
2859 | if (mode == TYPE_MODE (complex_double_type_node)) | |
2860 | return complex_double_type_node; | |
2861 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
2862 | return complex_long_double_type_node; | |
2863 | ||
2864 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
2865 | return complex_integer_type_node; | |
2866 | ||
2867 | inner_mode = GET_MODE_INNER (mode); | |
2868 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2869 | if (inner_type != NULL_TREE) | |
2870 | return build_complex_type (inner_type); | |
2871 | } | |
2872 | else if (VECTOR_MODE_P (mode)) | |
4917c376 | 2873 | { |
2874 | enum machine_mode inner_mode = GET_MODE_INNER (mode); | |
2875 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2876 | if (inner_type != NULL_TREE) | |
2877 | return build_vector_type_for_mode (inner_type, mode); | |
88ae7f04 | 2878 | } |
e2ea7e3a | 2879 | |
c4503c0a | 2880 | if (mode == TYPE_MODE (dfloat32_type_node)) |
2881 | return dfloat32_type_node; | |
2882 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
2883 | return dfloat64_type_node; | |
2884 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
2885 | return dfloat128_type_node; | |
2886 | ||
9421ebb9 | 2887 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
2888 | { | |
2889 | if (mode == TYPE_MODE (short_fract_type_node)) | |
2890 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
2891 | if (mode == TYPE_MODE (fract_type_node)) | |
2892 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
2893 | if (mode == TYPE_MODE (long_fract_type_node)) | |
2894 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
2895 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
2896 | return unsignedp ? sat_long_long_fract_type_node | |
2897 | : long_long_fract_type_node; | |
2898 | ||
2899 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
2900 | return unsignedp ? sat_unsigned_short_fract_type_node | |
2901 | : unsigned_short_fract_type_node; | |
2902 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
2903 | return unsignedp ? sat_unsigned_fract_type_node | |
2904 | : unsigned_fract_type_node; | |
2905 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
2906 | return unsignedp ? sat_unsigned_long_fract_type_node | |
2907 | : unsigned_long_fract_type_node; | |
2908 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
2909 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
2910 | : unsigned_long_long_fract_type_node; | |
2911 | ||
2912 | if (mode == TYPE_MODE (short_accum_type_node)) | |
2913 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
2914 | if (mode == TYPE_MODE (accum_type_node)) | |
2915 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
2916 | if (mode == TYPE_MODE (long_accum_type_node)) | |
2917 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
2918 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
2919 | return unsignedp ? sat_long_long_accum_type_node | |
2920 | : long_long_accum_type_node; | |
2921 | ||
2922 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
2923 | return unsignedp ? sat_unsigned_short_accum_type_node | |
2924 | : unsigned_short_accum_type_node; | |
2925 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
2926 | return unsignedp ? sat_unsigned_accum_type_node | |
2927 | : unsigned_accum_type_node; | |
2928 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
2929 | return unsignedp ? sat_unsigned_long_accum_type_node | |
2930 | : unsigned_long_accum_type_node; | |
2931 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
2932 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
2933 | : unsigned_long_long_accum_type_node; | |
2934 | ||
2935 | if (mode == QQmode) | |
2936 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
2937 | if (mode == HQmode) | |
2938 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
2939 | if (mode == SQmode) | |
2940 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
2941 | if (mode == DQmode) | |
2942 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
2943 | if (mode == TQmode) | |
2944 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
2945 | ||
2946 | if (mode == UQQmode) | |
2947 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
2948 | if (mode == UHQmode) | |
2949 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
2950 | if (mode == USQmode) | |
2951 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
2952 | if (mode == UDQmode) | |
2953 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
2954 | if (mode == UTQmode) | |
2955 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
2956 | ||
2957 | if (mode == HAmode) | |
2958 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
2959 | if (mode == SAmode) | |
2960 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
2961 | if (mode == DAmode) | |
2962 | return unsignedp ? sat_da_type_node : da_type_node; | |
2963 | if (mode == TAmode) | |
2964 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
2965 | ||
2966 | if (mode == UHAmode) | |
2967 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
2968 | if (mode == USAmode) | |
2969 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
2970 | if (mode == UDAmode) | |
2971 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
2972 | if (mode == UTAmode) | |
2973 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
2974 | } | |
2975 | ||
5b247e9f | 2976 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
2977 | if (TYPE_MODE (TREE_VALUE (t)) == mode) | |
2978 | return TREE_VALUE (t); | |
2979 | ||
b0fc3e72 | 2980 | return 0; |
2981 | } | |
20d39783 | 2982 | |
11773141 | 2983 | tree |
2984 | c_common_unsigned_type (tree type) | |
2985 | { | |
2986 | return c_common_signed_or_unsigned_type (1, type); | |
2987 | } | |
2988 | ||
20d39783 | 2989 | /* Return a signed type the same as TYPE in other respects. */ |
2990 | ||
2991 | tree | |
1cae46be | 2992 | c_common_signed_type (tree type) |
20d39783 | 2993 | { |
4070745f | 2994 | return c_common_signed_or_unsigned_type (0, type); |
20d39783 | 2995 | } |
2996 | ||
2997 | /* Return a type the same as TYPE except unsigned or | |
2998 | signed according to UNSIGNEDP. */ | |
2999 | ||
3000 | tree | |
1cae46be | 3001 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
20d39783 | 3002 | { |
7a91101f | 3003 | tree type1; |
20d39783 | 3004 | |
7a91101f | 3005 | /* This block of code emulates the behavior of the old |
3006 | c_common_unsigned_type. In particular, it returns | |
3007 | long_unsigned_type_node if passed a long, even when a int would | |
3008 | have the same size. This is necessary for warnings to work | |
3009 | correctly in archs where sizeof(int) == sizeof(long) */ | |
3010 | ||
3011 | type1 = TYPE_MAIN_VARIANT (type); | |
3012 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
3013 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3014 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
3015 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3016 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
3017 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3018 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
3019 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3020 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
3021 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
6388cfe2 | 3022 | if (int128_integer_type_node |
3023 | && (type1 == int128_integer_type_node | |
3024 | || type1 == int128_unsigned_type_node)) | |
3025 | return unsignedp ? int128_unsigned_type_node : int128_integer_type_node; | |
7a91101f | 3026 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) |
3027 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
3028 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
3029 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
3030 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
3031 | #endif | |
3032 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
3033 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
3034 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
3035 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
3036 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
3037 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
3038 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
3039 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
3040 | ||
9f92e1a2 | 3041 | #define C_COMMON_FIXED_TYPES(NAME) \ |
3042 | if (type1 == short_ ## NAME ## _type_node \ | |
3043 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
3044 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
3045 | : short_ ## NAME ## _type_node; \ | |
3046 | if (type1 == NAME ## _type_node \ | |
3047 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
3048 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
3049 | : NAME ## _type_node; \ | |
3050 | if (type1 == long_ ## NAME ## _type_node \ | |
3051 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
3052 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
3053 | : long_ ## NAME ## _type_node; \ | |
3054 | if (type1 == long_long_ ## NAME ## _type_node \ | |
3055 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
3056 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
3057 | : long_long_ ## NAME ## _type_node; | |
3058 | ||
3059 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
3060 | if (type1 == NAME ## _type_node \ | |
3061 | || type1 == u ## NAME ## _type_node) \ | |
3062 | return unsignedp ? u ## NAME ## _type_node \ | |
3063 | : NAME ## _type_node; | |
3064 | ||
3065 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
3066 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
3067 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
3068 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
3069 | : sat_ ## short_ ## NAME ## _type_node; \ | |
3070 | if (type1 == sat_ ## NAME ## _type_node \ | |
3071 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
3072 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
3073 | : sat_ ## NAME ## _type_node; \ | |
3074 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
3075 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
3076 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
3077 | : sat_ ## long_ ## NAME ## _type_node; \ | |
3078 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
3079 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
3080 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
3081 | : sat_ ## long_long_ ## NAME ## _type_node; | |
3082 | ||
3083 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
3084 | if (type1 == sat_ ## NAME ## _type_node \ | |
3085 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
3086 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
3087 | : sat_ ## NAME ## _type_node; | |
3088 | ||
3089 | C_COMMON_FIXED_TYPES (fract); | |
3090 | C_COMMON_FIXED_TYPES_SAT (fract); | |
3091 | C_COMMON_FIXED_TYPES (accum); | |
3092 | C_COMMON_FIXED_TYPES_SAT (accum); | |
3093 | ||
3094 | C_COMMON_FIXED_MODE_TYPES (qq); | |
3095 | C_COMMON_FIXED_MODE_TYPES (hq); | |
3096 | C_COMMON_FIXED_MODE_TYPES (sq); | |
3097 | C_COMMON_FIXED_MODE_TYPES (dq); | |
3098 | C_COMMON_FIXED_MODE_TYPES (tq); | |
3099 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
3100 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
3101 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
3102 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
3103 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
3104 | C_COMMON_FIXED_MODE_TYPES (ha); | |
3105 | C_COMMON_FIXED_MODE_TYPES (sa); | |
3106 | C_COMMON_FIXED_MODE_TYPES (da); | |
3107 | C_COMMON_FIXED_MODE_TYPES (ta); | |
3108 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
3109 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
3110 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
3111 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
9421ebb9 | 3112 | |
4f7f7efd | 3113 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
3114 | the precision; they have precision set to match their range, but | |
3115 | may use a wider mode to match an ABI. If we change modes, we may | |
3116 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
3117 | the precision as well, so as to yield correct results for | |
3118 | bit-field types. C++ does not have these separate bit-field | |
3119 | types, and producing a signed or unsigned variant of an | |
3120 | ENUMERAL_TYPE may cause other problems as well. */ | |
3121 | ||
ac265864 | 3122 | if (!INTEGRAL_TYPE_P (type) |
3123 | || TYPE_UNSIGNED (type) == unsignedp) | |
3124 | return type; | |
3125 | ||
4f7f7efd | 3126 | #define TYPE_OK(node) \ |
3127 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
0c4abe5b | 3128 | && TYPE_PRECISION (type) == TYPE_PRECISION (node)) |
4f7f7efd | 3129 | if (TYPE_OK (signed_char_type_node)) |
20d39783 | 3130 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
4f7f7efd | 3131 | if (TYPE_OK (integer_type_node)) |
20d39783 | 3132 | return unsignedp ? unsigned_type_node : integer_type_node; |
4f7f7efd | 3133 | if (TYPE_OK (short_integer_type_node)) |
20d39783 | 3134 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
4f7f7efd | 3135 | if (TYPE_OK (long_integer_type_node)) |
20d39783 | 3136 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
4f7f7efd | 3137 | if (TYPE_OK (long_long_integer_type_node)) |
20d39783 | 3138 | return (unsignedp ? long_long_unsigned_type_node |
3139 | : long_long_integer_type_node); | |
6388cfe2 | 3140 | if (int128_integer_type_node && TYPE_OK (int128_integer_type_node)) |
3141 | return (unsignedp ? int128_unsigned_type_node | |
3142 | : int128_integer_type_node); | |
4f7f7efd | 3143 | if (TYPE_OK (widest_integer_literal_type_node)) |
20d39783 | 3144 | return (unsignedp ? widest_unsigned_literal_type_node |
3145 | : widest_integer_literal_type_node); | |
ef11801e | 3146 | |
3147 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
4f7f7efd | 3148 | if (TYPE_OK (intTI_type_node)) |
ef11801e | 3149 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
3150 | #endif | |
4f7f7efd | 3151 | if (TYPE_OK (intDI_type_node)) |
ef11801e | 3152 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
4f7f7efd | 3153 | if (TYPE_OK (intSI_type_node)) |
ef11801e | 3154 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
4f7f7efd | 3155 | if (TYPE_OK (intHI_type_node)) |
ef11801e | 3156 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
4f7f7efd | 3157 | if (TYPE_OK (intQI_type_node)) |
ef11801e | 3158 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
4f7f7efd | 3159 | #undef TYPE_OK |
ef11801e | 3160 | |
0c4abe5b | 3161 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); |
20d39783 | 3162 | } |
b268e47e | 3163 | |
c0e47fd4 | 3164 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
3165 | ||
3166 | tree | |
3167 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
3168 | { | |
3169 | /* Extended integer types of the same width as a standard type have | |
3170 | lesser rank, so those of the same width as int promote to int or | |
3171 | unsigned int and are valid for printf formats expecting int or | |
3172 | unsigned int. To avoid such special cases, avoid creating | |
3173 | extended integer types for bit-fields if a standard integer type | |
3174 | is available. */ | |
3175 | if (width == TYPE_PRECISION (integer_type_node)) | |
3176 | return unsignedp ? unsigned_type_node : integer_type_node; | |
3177 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
3178 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
3179 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
3180 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
3181 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
3182 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
3183 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
3184 | return (unsignedp ? long_long_unsigned_type_node | |
3185 | : long_long_integer_type_node); | |
6388cfe2 | 3186 | if (int128_integer_type_node |
3187 | && width == TYPE_PRECISION (int128_integer_type_node)) | |
3188 | return (unsignedp ? int128_unsigned_type_node | |
3189 | : int128_integer_type_node); | |
c0e47fd4 | 3190 | return build_nonstandard_integer_type (width, unsignedp); |
3191 | } | |
3192 | ||
b268e47e | 3193 | /* The C version of the register_builtin_type langhook. */ |
3194 | ||
3195 | void | |
3196 | c_register_builtin_type (tree type, const char* name) | |
3197 | { | |
3198 | tree decl; | |
3199 | ||
e60a6f7b | 3200 | decl = build_decl (UNKNOWN_LOCATION, |
3201 | TYPE_DECL, get_identifier (name), type); | |
b268e47e | 3202 | DECL_ARTIFICIAL (decl) = 1; |
3203 | if (!TYPE_NAME (type)) | |
3204 | TYPE_NAME (type) = decl; | |
3205 | pushdecl (decl); | |
5b247e9f | 3206 | |
3207 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
b268e47e | 3208 | } |
a9b9d10c | 3209 | \f |
aff9e656 | 3210 | /* Print an error message for invalid operands to arith operation |
8e70fb09 | 3211 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. |
3212 | LOCATION is the location of the message. */ | |
b0fc3e72 | 3213 | |
3214 | void | |
8e70fb09 | 3215 | binary_op_error (location_t location, enum tree_code code, |
3216 | tree type0, tree type1) | |
b0fc3e72 | 3217 | { |
19cb6b50 | 3218 | const char *opname; |
f03946e4 | 3219 | |
b0fc3e72 | 3220 | switch (code) |
3221 | { | |
b0fc3e72 | 3222 | case PLUS_EXPR: |
3223 | opname = "+"; break; | |
3224 | case MINUS_EXPR: | |
3225 | opname = "-"; break; | |
3226 | case MULT_EXPR: | |
3227 | opname = "*"; break; | |
3228 | case MAX_EXPR: | |
3229 | opname = "max"; break; | |
3230 | case MIN_EXPR: | |
3231 | opname = "min"; break; | |
3232 | case EQ_EXPR: | |
3233 | opname = "=="; break; | |
3234 | case NE_EXPR: | |
3235 | opname = "!="; break; | |
3236 | case LE_EXPR: | |
3237 | opname = "<="; break; | |
3238 | case GE_EXPR: | |
3239 | opname = ">="; break; | |
3240 | case LT_EXPR: | |
3241 | opname = "<"; break; | |
3242 | case GT_EXPR: | |
3243 | opname = ">"; break; | |
3244 | case LSHIFT_EXPR: | |
3245 | opname = "<<"; break; | |
3246 | case RSHIFT_EXPR: | |
3247 | opname = ">>"; break; | |
3248 | case TRUNC_MOD_EXPR: | |
66618a1e | 3249 | case FLOOR_MOD_EXPR: |
b0fc3e72 | 3250 | opname = "%"; break; |
3251 | case TRUNC_DIV_EXPR: | |
66618a1e | 3252 | case FLOOR_DIV_EXPR: |
b0fc3e72 | 3253 | opname = "/"; break; |
3254 | case BIT_AND_EXPR: | |
3255 | opname = "&"; break; | |
3256 | case BIT_IOR_EXPR: | |
3257 | opname = "|"; break; | |
3258 | case TRUTH_ANDIF_EXPR: | |
3259 | opname = "&&"; break; | |
3260 | case TRUTH_ORIF_EXPR: | |
3261 | opname = "||"; break; | |
3262 | case BIT_XOR_EXPR: | |
3263 | opname = "^"; break; | |
31f820d2 | 3264 | default: |
315ba355 | 3265 | gcc_unreachable (); |
b0fc3e72 | 3266 | } |
8e70fb09 | 3267 | error_at (location, |
3268 | "invalid operands to binary %s (have %qT and %qT)", opname, | |
3269 | type0, type1); | |
b0fc3e72 | 3270 | } |
3271 | \f | |
3272 | /* Subroutine of build_binary_op, used for comparison operations. | |
3273 | See if the operands have both been converted from subword integer types | |
3274 | and, if so, perhaps change them both back to their original type. | |
5b511807 | 3275 | This function is also responsible for converting the two operands |
3276 | to the proper common type for comparison. | |
b0fc3e72 | 3277 | |
3278 | The arguments of this function are all pointers to local variables | |
3279 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
3280 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
3281 | ||
3282 | If this function returns nonzero, it means that the comparison has | |
3283 | a constant value. What this function returns is an expression for | |
3284 | that value. */ | |
3285 | ||
3286 | tree | |
1cae46be | 3287 | shorten_compare (tree *op0_ptr, tree *op1_ptr, tree *restype_ptr, |
3288 | enum tree_code *rescode_ptr) | |
b0fc3e72 | 3289 | { |
19cb6b50 | 3290 | tree type; |
b0fc3e72 | 3291 | tree op0 = *op0_ptr; |
3292 | tree op1 = *op1_ptr; | |
3293 | int unsignedp0, unsignedp1; | |
3294 | int real1, real2; | |
3295 | tree primop0, primop1; | |
3296 | enum tree_code code = *rescode_ptr; | |
3297 | ||
3298 | /* Throw away any conversions to wider types | |
3299 | already present in the operands. */ | |
3300 | ||
3301 | primop0 = get_narrower (op0, &unsignedp0); | |
3302 | primop1 = get_narrower (op1, &unsignedp1); | |
3303 | ||
119d06b2 | 3304 | /* If primopN is first sign-extended from primopN's precision to opN's |
3305 | precision, then zero-extended from opN's precision to | |
3306 | *restype_ptr precision, shortenings might be invalid. */ | |
3307 | if (TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (TREE_TYPE (op0)) | |
3308 | && TYPE_PRECISION (TREE_TYPE (op0)) < TYPE_PRECISION (*restype_ptr) | |
3309 | && !unsignedp0 | |
3310 | && TYPE_UNSIGNED (TREE_TYPE (op0))) | |
3311 | primop0 = op0; | |
3312 | if (TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (TREE_TYPE (op1)) | |
3313 | && TYPE_PRECISION (TREE_TYPE (op1)) < TYPE_PRECISION (*restype_ptr) | |
3314 | && !unsignedp1 | |
3315 | && TYPE_UNSIGNED (TREE_TYPE (op1))) | |
3316 | primop1 = op1; | |
3317 | ||
b0fc3e72 | 3318 | /* Handle the case that OP0 does not *contain* a conversion |
3319 | but it *requires* conversion to FINAL_TYPE. */ | |
3320 | ||
3321 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
78a8ed03 | 3322 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b0fc3e72 | 3323 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
78a8ed03 | 3324 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b0fc3e72 | 3325 | |
3326 | /* If one of the operands must be floated, we cannot optimize. */ | |
3327 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
3328 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
3329 | ||
3330 | /* If first arg is constant, swap the args (changing operation | |
2bd278cc | 3331 | so value is preserved), for canonicalization. Don't do this if |
3332 | the second arg is 0. */ | |
b0fc3e72 | 3333 | |
2bd278cc | 3334 | if (TREE_CONSTANT (primop0) |
9421ebb9 | 3335 | && !integer_zerop (primop1) && !real_zerop (primop1) |
3336 | && !fixed_zerop (primop1)) | |
b0fc3e72 | 3337 | { |
19cb6b50 | 3338 | tree tem = primop0; |
3339 | int temi = unsignedp0; | |
b0fc3e72 | 3340 | primop0 = primop1; |
3341 | primop1 = tem; | |
3342 | tem = op0; | |
3343 | op0 = op1; | |
3344 | op1 = tem; | |
3345 | *op0_ptr = op0; | |
3346 | *op1_ptr = op1; | |
3347 | unsignedp0 = unsignedp1; | |
3348 | unsignedp1 = temi; | |
3349 | temi = real1; | |
3350 | real1 = real2; | |
3351 | real2 = temi; | |
3352 | ||
3353 | switch (code) | |
3354 | { | |
3355 | case LT_EXPR: | |
3356 | code = GT_EXPR; | |
3357 | break; | |
3358 | case GT_EXPR: | |
3359 | code = LT_EXPR; | |
3360 | break; | |
3361 | case LE_EXPR: | |
3362 | code = GE_EXPR; | |
3363 | break; | |
3364 | case GE_EXPR: | |
3365 | code = LE_EXPR; | |
3366 | break; | |
31f820d2 | 3367 | default: |
3368 | break; | |
b0fc3e72 | 3369 | } |
3370 | *rescode_ptr = code; | |
3371 | } | |
3372 | ||
3373 | /* If comparing an integer against a constant more bits wide, | |
3374 | maybe we can deduce a value of 1 or 0 independent of the data. | |
3375 | Or else truncate the constant now | |
3376 | rather than extend the variable at run time. | |
3377 | ||
3378 | This is only interesting if the constant is the wider arg. | |
3379 | Also, it is not safe if the constant is unsigned and the | |
3380 | variable arg is signed, since in this case the variable | |
3381 | would be sign-extended and then regarded as unsigned. | |
3382 | Our technique fails in this case because the lowest/highest | |
3383 | possible unsigned results don't follow naturally from the | |
3384 | lowest/highest possible values of the variable operand. | |
3385 | For just EQ_EXPR and NE_EXPR there is another technique that | |
3386 | could be used: see if the constant can be faithfully represented | |
3387 | in the other operand's type, by truncating it and reextending it | |
3388 | and see if that preserves the constant's value. */ | |
3389 | ||
3390 | if (!real1 && !real2 | |
9421ebb9 | 3391 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b0fc3e72 | 3392 | && TREE_CODE (primop1) == INTEGER_CST |
3393 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
3394 | { | |
3395 | int min_gt, max_gt, min_lt, max_lt; | |
3396 | tree maxval, minval; | |
3397 | /* 1 if comparison is nominally unsigned. */ | |
78a8ed03 | 3398 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b0fc3e72 | 3399 | tree val; |
3400 | ||
4070745f | 3401 | type = c_common_signed_or_unsigned_type (unsignedp0, |
3402 | TREE_TYPE (primop0)); | |
cda09c61 | 3403 | |
b0fc3e72 | 3404 | maxval = TYPE_MAX_VALUE (type); |
3405 | minval = TYPE_MIN_VALUE (type); | |
3406 | ||
3407 | if (unsignedp && !unsignedp0) | |
4070745f | 3408 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b0fc3e72 | 3409 | |
3410 | if (TREE_TYPE (primop1) != *restype_ptr) | |
18dbec6f | 3411 | { |
9a5e8086 | 3412 | /* Convert primop1 to target type, but do not introduce |
3413 | additional overflow. We know primop1 is an int_cst. */ | |
c8110c8f | 3414 | primop1 = force_fit_type_double (*restype_ptr, |
d3237426 | 3415 | tree_to_double_int (primop1), |
3416 | 0, TREE_OVERFLOW (primop1)); | |
18dbec6f | 3417 | } |
b0fc3e72 | 3418 | if (type != *restype_ptr) |
3419 | { | |
3420 | minval = convert (*restype_ptr, minval); | |
3421 | maxval = convert (*restype_ptr, maxval); | |
3422 | } | |
3423 | ||
3424 | if (unsignedp && unsignedp0) | |
3425 | { | |
3426 | min_gt = INT_CST_LT_UNSIGNED (primop1, minval); | |
3427 | max_gt = INT_CST_LT_UNSIGNED (primop1, maxval); | |
3428 | min_lt = INT_CST_LT_UNSIGNED (minval, primop1); | |
3429 | max_lt = INT_CST_LT_UNSIGNED (maxval, primop1); | |
3430 | } | |
3431 | else | |
3432 | { | |
3433 | min_gt = INT_CST_LT (primop1, minval); | |
3434 | max_gt = INT_CST_LT (primop1, maxval); | |
3435 | min_lt = INT_CST_LT (minval, primop1); | |
3436 | max_lt = INT_CST_LT (maxval, primop1); | |
3437 | } | |
3438 | ||
3439 | val = 0; | |
3440 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
3441 | if (code == NE_EXPR) | |
3442 | { | |
3443 | if (max_lt || min_gt) | |
3c2239cf | 3444 | val = truthvalue_true_node; |
b0fc3e72 | 3445 | } |
3446 | else if (code == EQ_EXPR) | |
3447 | { | |
3448 | if (max_lt || min_gt) | |
3c2239cf | 3449 | val = truthvalue_false_node; |
b0fc3e72 | 3450 | } |
3451 | else if (code == LT_EXPR) | |
3452 | { | |
3453 | if (max_lt) | |
3c2239cf | 3454 | val = truthvalue_true_node; |
b0fc3e72 | 3455 | if (!min_lt) |
3c2239cf | 3456 | val = truthvalue_false_node; |
b0fc3e72 | 3457 | } |
3458 | else if (code == GT_EXPR) | |
3459 | { | |
3460 | if (min_gt) | |
3c2239cf | 3461 | val = truthvalue_true_node; |
b0fc3e72 | 3462 | if (!max_gt) |
3c2239cf | 3463 | val = truthvalue_false_node; |
b0fc3e72 | 3464 | } |
3465 | else if (code == LE_EXPR) | |
3466 | { | |
3467 | if (!max_gt) | |
3c2239cf | 3468 | val = truthvalue_true_node; |
b0fc3e72 | 3469 | if (min_gt) |
3c2239cf | 3470 | val = truthvalue_false_node; |
b0fc3e72 | 3471 | } |
3472 | else if (code == GE_EXPR) | |
3473 | { | |
3474 | if (!min_lt) | |
3c2239cf | 3475 | val = truthvalue_true_node; |
b0fc3e72 | 3476 | if (max_lt) |
3c2239cf | 3477 | val = truthvalue_false_node; |
b0fc3e72 | 3478 | } |
3479 | ||
3480 | /* If primop0 was sign-extended and unsigned comparison specd, | |
3481 | we did a signed comparison above using the signed type bounds. | |
3482 | But the comparison we output must be unsigned. | |
3483 | ||
3484 | Also, for inequalities, VAL is no good; but if the signed | |
3485 | comparison had *any* fixed result, it follows that the | |
3486 | unsigned comparison just tests the sign in reverse | |
3487 | (positive values are LE, negative ones GE). | |
3488 | So we can generate an unsigned comparison | |
3489 | against an extreme value of the signed type. */ | |
3490 | ||
3491 | if (unsignedp && !unsignedp0) | |
3492 | { | |
3493 | if (val != 0) | |
3494 | switch (code) | |
3495 | { | |
3496 | case LT_EXPR: | |
3497 | case GE_EXPR: | |
3498 | primop1 = TYPE_MIN_VALUE (type); | |
3499 | val = 0; | |
3500 | break; | |
3501 | ||
3502 | case LE_EXPR: | |
3503 | case GT_EXPR: | |
3504 | primop1 = TYPE_MAX_VALUE (type); | |
3505 | val = 0; | |
3506 | break; | |
31f820d2 | 3507 | |
3508 | default: | |
3509 | break; | |
b0fc3e72 | 3510 | } |
11773141 | 3511 | type = c_common_unsigned_type (type); |
b0fc3e72 | 3512 | } |
3513 | ||
fe5f2366 | 3514 | if (TREE_CODE (primop0) != INTEGER_CST) |
b0fc3e72 | 3515 | { |
3c2239cf | 3516 | if (val == truthvalue_false_node) |
e6e352cb | 3517 | warning (OPT_Wtype_limits, "comparison is always false due to limited range of data type"); |
3c2239cf | 3518 | if (val == truthvalue_true_node) |
e6e352cb | 3519 | warning (OPT_Wtype_limits, "comparison is always true due to limited range of data type"); |
b0fc3e72 | 3520 | } |
3521 | ||
3522 | if (val != 0) | |
3523 | { | |
3524 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3525 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 3526 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b0fc3e72 | 3527 | return val; |
3528 | } | |
3529 | ||
3530 | /* Value is not predetermined, but do the comparison | |
3531 | in the type of the operand that is not constant. | |
3532 | TYPE is already properly set. */ | |
3533 | } | |
c4503c0a | 3534 | |
3535 | /* If either arg is decimal float and the other is float, find the | |
3536 | proper common type to use for comparison. */ | |
3537 | else if (real1 && real2 | |
3538 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
3539 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
3540 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
3541 | ||
b0fc3e72 | 3542 | else if (real1 && real2 |
2203bd5c | 3543 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
3544 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b0fc3e72 | 3545 | type = TREE_TYPE (primop0); |
3546 | ||
3547 | /* If args' natural types are both narrower than nominal type | |
3548 | and both extend in the same manner, compare them | |
3549 | in the type of the wider arg. | |
3550 | Otherwise must actually extend both to the nominal | |
3551 | common type lest different ways of extending | |
3552 | alter the result. | |
3553 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
3554 | ||
3555 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
3556 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
3557 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
3558 | { | |
3559 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4070745f | 3560 | type = c_common_signed_or_unsigned_type (unsignedp0 |
78a8ed03 | 3561 | || TYPE_UNSIGNED (*restype_ptr), |
4070745f | 3562 | type); |
b0fc3e72 | 3563 | /* Make sure shorter operand is extended the right way |
3564 | to match the longer operand. */ | |
4070745f | 3565 | primop0 |
3566 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
3567 | TREE_TYPE (primop0)), | |
3568 | primop0); | |
3569 | primop1 | |
3570 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
3571 | TREE_TYPE (primop1)), | |
3572 | primop1); | |
b0fc3e72 | 3573 | } |
3574 | else | |
3575 | { | |
3576 | /* Here we must do the comparison on the nominal type | |
3577 | using the args exactly as we received them. */ | |
3578 | type = *restype_ptr; | |
3579 | primop0 = op0; | |
3580 | primop1 = op1; | |
3581 | ||
3582 | if (!real1 && !real2 && integer_zerop (primop1) | |
78a8ed03 | 3583 | && TYPE_UNSIGNED (*restype_ptr)) |
b0fc3e72 | 3584 | { |
3585 | tree value = 0; | |
3586 | switch (code) | |
3587 | { | |
3588 | case GE_EXPR: | |
e6e352cb | 3589 | /* All unsigned values are >= 0, so we warn. However, |
3590 | if OP0 is a constant that is >= 0, the signedness of | |
3591 | the comparison isn't an issue, so suppress the | |
3592 | warning. */ | |
3593 | if (warn_type_limits && !in_system_header | |
84166705 | 3594 | && !(TREE_CODE (primop0) == INTEGER_CST |
3595 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3596 | primop0)))) | |
48e1416a | 3597 | warning (OPT_Wtype_limits, |
e6e352cb | 3598 | "comparison of unsigned expression >= 0 is always true"); |
3c2239cf | 3599 | value = truthvalue_true_node; |
b0fc3e72 | 3600 | break; |
3601 | ||
3602 | case LT_EXPR: | |
e6e352cb | 3603 | if (warn_type_limits && !in_system_header |
84166705 | 3604 | && !(TREE_CODE (primop0) == INTEGER_CST |
3605 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3606 | primop0)))) | |
48e1416a | 3607 | warning (OPT_Wtype_limits, |
e6e352cb | 3608 | "comparison of unsigned expression < 0 is always false"); |
3c2239cf | 3609 | value = truthvalue_false_node; |
31f820d2 | 3610 | break; |
3611 | ||
3612 | default: | |
3613 | break; | |
b0fc3e72 | 3614 | } |
3615 | ||
3616 | if (value != 0) | |
3617 | { | |
3618 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3619 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 3620 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
3621 | primop0, value); | |
b0fc3e72 | 3622 | return value; |
3623 | } | |
3624 | } | |
3625 | } | |
3626 | ||
3627 | *op0_ptr = convert (type, primop0); | |
3628 | *op1_ptr = convert (type, primop1); | |
3629 | ||
3c2239cf | 3630 | *restype_ptr = truthvalue_type_node; |
b0fc3e72 | 3631 | |
3632 | return 0; | |
3633 | } | |
3634 | \f | |
1c26100f | 3635 | /* Return a tree for the sum or difference (RESULTCODE says which) |
3636 | of pointer PTROP and integer INTOP. */ | |
3637 | ||
3638 | tree | |
389dd41b | 3639 | pointer_int_sum (location_t loc, enum tree_code resultcode, |
3640 | tree ptrop, tree intop) | |
1c26100f | 3641 | { |
add6ee5e | 3642 | tree size_exp, ret; |
1c26100f | 3643 | |
1c26100f | 3644 | /* The result is a pointer of the same type that is being added. */ |
1c26100f | 3645 | tree result_type = TREE_TYPE (ptrop); |
3646 | ||
3647 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
3648 | { | |
48e1416a | 3649 | pedwarn (loc, pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
8864917d | 3650 | "pointer of type %<void *%> used in arithmetic"); |
1c26100f | 3651 | size_exp = integer_one_node; |
3652 | } | |
3653 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
3654 | { | |
48e1416a | 3655 | pedwarn (loc, pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
8864917d | 3656 | "pointer to a function used in arithmetic"); |
1c26100f | 3657 | size_exp = integer_one_node; |
3658 | } | |
3659 | else if (TREE_CODE (TREE_TYPE (result_type)) == METHOD_TYPE) | |
3660 | { | |
48e1416a | 3661 | pedwarn (loc, pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
8864917d | 3662 | "pointer to member function used in arithmetic"); |
1c26100f | 3663 | size_exp = integer_one_node; |
3664 | } | |
1c26100f | 3665 | else |
3666 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
3667 | ||
add6ee5e | 3668 | /* We are manipulating pointer values, so we don't need to warn |
3669 | about relying on undefined signed overflow. We disable the | |
3670 | warning here because we use integer types so fold won't know that | |
3671 | they are really pointers. */ | |
3672 | fold_defer_overflow_warnings (); | |
3673 | ||
1c26100f | 3674 | /* If what we are about to multiply by the size of the elements |
3675 | contains a constant term, apply distributive law | |
3676 | and multiply that constant term separately. | |
3677 | This helps produce common subexpressions. */ | |
1c26100f | 3678 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
84166705 | 3679 | && !TREE_CONSTANT (intop) |
1c26100f | 3680 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
3681 | && TREE_CONSTANT (size_exp) | |
3682 | /* If the constant comes from pointer subtraction, | |
3683 | skip this optimization--it would cause an error. */ | |
3684 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
3685 | /* If the constant is unsigned, and smaller than the pointer size, | |
3686 | then we must skip this optimization. This is because it could cause | |
3687 | an overflow error if the constant is negative but INTOP is not. */ | |
84166705 | 3688 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
1c26100f | 3689 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
3690 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
3691 | { | |
3692 | enum tree_code subcode = resultcode; | |
3693 | tree int_type = TREE_TYPE (intop); | |
3694 | if (TREE_CODE (intop) == MINUS_EXPR) | |
3695 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
3696 | /* Convert both subexpression types to the type of intop, | |
3697 | because weird cases involving pointer arithmetic | |
3698 | can result in a sum or difference with different type args. */ | |
8e70fb09 | 3699 | ptrop = build_binary_op (EXPR_LOCATION (TREE_OPERAND (intop, 1)), |
3700 | subcode, ptrop, | |
1c26100f | 3701 | convert (int_type, TREE_OPERAND (intop, 1)), 1); |
3702 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
3703 | } | |
3704 | ||
3705 | /* Convert the integer argument to a type the same size as sizetype | |
3706 | so the multiply won't overflow spuriously. */ | |
1c26100f | 3707 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
78a8ed03 | 3708 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
1cae46be | 3709 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
78a8ed03 | 3710 | TYPE_UNSIGNED (sizetype)), intop); |
1c26100f | 3711 | |
3712 | /* Replace the integer argument with a suitable product by the object size. | |
c6feb9f1 | 3713 | Do this multiplication as signed, then convert to the appropriate type |
3714 | for the pointer operation and disregard an overflow that occured only | |
3715 | because of the sign-extension change in the latter conversion. */ | |
3716 | { | |
3717 | tree t = build_binary_op (loc, | |
3718 | MULT_EXPR, intop, | |
3719 | convert (TREE_TYPE (intop), size_exp), 1); | |
3720 | intop = convert (sizetype, t); | |
3721 | if (TREE_OVERFLOW_P (intop) && !TREE_OVERFLOW (t)) | |
3722 | intop = build_int_cst_wide (TREE_TYPE (intop), TREE_INT_CST_LOW (intop), | |
3723 | TREE_INT_CST_HIGH (intop)); | |
3724 | } | |
0de36bdb | 3725 | |
499e523f | 3726 | /* Create the sum or difference. */ |
0de36bdb | 3727 | if (resultcode == MINUS_EXPR) |
389dd41b | 3728 | intop = fold_build1_loc (loc, NEGATE_EXPR, sizetype, intop); |
1c26100f | 3729 | |
389dd41b | 3730 | ret = fold_build2_loc (loc, POINTER_PLUS_EXPR, result_type, ptrop, intop); |
add6ee5e | 3731 | |
3732 | fold_undefer_and_ignore_overflow_warnings (); | |
3733 | ||
3734 | return ret; | |
1c26100f | 3735 | } |
3736 | \f | |
f59e3889 | 3737 | /* Wrap a C_MAYBE_CONST_EXPR around an expression that is fully folded |
3738 | and if NON_CONST is known not to be permitted in an evaluated part | |
3739 | of a constant expression. */ | |
3740 | ||
3741 | tree | |
3742 | c_wrap_maybe_const (tree expr, bool non_const) | |
3743 | { | |
3744 | bool nowarning = TREE_NO_WARNING (expr); | |
3745 | location_t loc = EXPR_LOCATION (expr); | |
3746 | ||
3747 | /* This should never be called for C++. */ | |
3748 | if (c_dialect_cxx ()) | |
3749 | gcc_unreachable (); | |
3750 | ||
3751 | /* The result of folding may have a NOP_EXPR to set TREE_NO_WARNING. */ | |
3752 | STRIP_TYPE_NOPS (expr); | |
3753 | expr = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL, expr); | |
3754 | C_MAYBE_CONST_EXPR_NON_CONST (expr) = non_const; | |
3755 | if (nowarning) | |
3756 | TREE_NO_WARNING (expr) = 1; | |
3757 | protected_set_expr_location (expr, loc); | |
3758 | ||
3759 | return expr; | |
3760 | } | |
3761 | ||
a75b1c71 | 3762 | /* Wrap a SAVE_EXPR around EXPR, if appropriate. Like save_expr, but |
3763 | for C folds the inside expression and wraps a C_MAYBE_CONST_EXPR | |
3764 | around the SAVE_EXPR if needed so that c_fully_fold does not need | |
3765 | to look inside SAVE_EXPRs. */ | |
3766 | ||
3767 | tree | |
3768 | c_save_expr (tree expr) | |
3769 | { | |
3770 | bool maybe_const = true; | |
3771 | if (c_dialect_cxx ()) | |
3772 | return save_expr (expr); | |
3773 | expr = c_fully_fold (expr, false, &maybe_const); | |
3774 | expr = save_expr (expr); | |
3775 | if (!maybe_const) | |
f59e3889 | 3776 | expr = c_wrap_maybe_const (expr, true); |
a75b1c71 | 3777 | return expr; |
3778 | } | |
3779 | ||
6b68e71a | 3780 | /* Return whether EXPR is a declaration whose address can never be |
3781 | NULL. */ | |
3782 | ||
3783 | bool | |
9f627b1a | 3784 | decl_with_nonnull_addr_p (const_tree expr) |
6b68e71a | 3785 | { |
3786 | return (DECL_P (expr) | |
3787 | && (TREE_CODE (expr) == PARM_DECL | |
3788 | || TREE_CODE (expr) == LABEL_DECL | |
3789 | || !DECL_WEAK (expr))); | |
3790 | } | |
3791 | ||
b0fc3e72 | 3792 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
45a78cc0 | 3793 | or for an `if' or `while' statement or ?..: exp. It should already |
3794 | have been validated to be of suitable type; otherwise, a bad | |
3795 | diagnostic may result. | |
b0fc3e72 | 3796 | |
8e70fb09 | 3797 | The EXPR is located at LOCATION. |
3798 | ||
b0fc3e72 | 3799 | This preparation consists of taking the ordinary |
3800 | representation of an expression expr and producing a valid tree | |
3801 | boolean expression describing whether expr is nonzero. We could | |
3c2239cf | 3802 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b0fc3e72 | 3803 | but we optimize comparisons, &&, ||, and !. |
3804 | ||
3c2239cf | 3805 | The resulting type should always be `truthvalue_type_node'. */ |
b0fc3e72 | 3806 | |
3807 | tree | |
8e70fb09 | 3808 | c_common_truthvalue_conversion (location_t location, tree expr) |
b0fc3e72 | 3809 | { |
b0fc3e72 | 3810 | switch (TREE_CODE (expr)) |
3811 | { | |
318a728f | 3812 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
e1232ce2 | 3813 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
3814 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
3815 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
ce04dcdc | 3816 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3817 | return expr; | |
e60a6f7b | 3818 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
ce04dcdc | 3819 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); |
e60a6f7b | 3820 | goto ret; |
ce04dcdc | 3821 | |
b0fc3e72 | 3822 | case TRUTH_ANDIF_EXPR: |
3823 | case TRUTH_ORIF_EXPR: | |
3824 | case TRUTH_AND_EXPR: | |
3825 | case TRUTH_OR_EXPR: | |
31f6e93c | 3826 | case TRUTH_XOR_EXPR: |
ce04dcdc | 3827 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3828 | return expr; | |
e60a6f7b | 3829 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
48e1416a | 3830 | c_common_truthvalue_conversion (location, |
e60a6f7b | 3831 | TREE_OPERAND (expr, 0)), |
3832 | c_common_truthvalue_conversion (location, | |
3833 | TREE_OPERAND (expr, 1))); | |
3834 | goto ret; | |
3e851b85 | 3835 | |
f6e28f72 | 3836 | case TRUTH_NOT_EXPR: |
ce04dcdc | 3837 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3838 | return expr; | |
e60a6f7b | 3839 | expr = build1 (TREE_CODE (expr), truthvalue_type_node, |
3840 | c_common_truthvalue_conversion (location, | |
3841 | TREE_OPERAND (expr, 0))); | |
3842 | goto ret; | |
f6e28f72 | 3843 | |
b0fc3e72 | 3844 | case ERROR_MARK: |
3845 | return expr; | |
3846 | ||
3847 | case INTEGER_CST: | |
eddad94a | 3848 | return integer_zerop (expr) ? truthvalue_false_node |
3849 | : truthvalue_true_node; | |
b0fc3e72 | 3850 | |
3851 | case REAL_CST: | |
5000e21c | 3852 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
3853 | ? truthvalue_true_node | |
3854 | : truthvalue_false_node; | |
b0fc3e72 | 3855 | |
9421ebb9 | 3856 | case FIXED_CST: |
3857 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
3858 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
3859 | ? truthvalue_true_node | |
3860 | : truthvalue_false_node; | |
3861 | ||
ce04dcdc | 3862 | case FUNCTION_DECL: |
b6889cb0 | 3863 | expr = build_unary_op (location, ADDR_EXPR, expr, 0); |
ce04dcdc | 3864 | /* Fall through. */ |
3865 | ||
b0fc3e72 | 3866 | case ADDR_EXPR: |
ce871053 | 3867 | { |
ee7d4d6a | 3868 | tree inner = TREE_OPERAND (expr, 0); |
6b68e71a | 3869 | if (decl_with_nonnull_addr_p (inner)) |
ce871053 | 3870 | { |
6b68e71a | 3871 | /* Common Ada/Pascal programmer's mistake. */ |
8e70fb09 | 3872 | warning_at (location, |
3873 | OPT_Waddress, | |
3874 | "the address of %qD will always evaluate as %<true%>", | |
3875 | inner); | |
ce871053 | 3876 | return truthvalue_true_node; |
3877 | } | |
d473d901 | 3878 | break; |
ce871053 | 3879 | } |
b0fc3e72 | 3880 | |
2203bd5c | 3881 | case COMPLEX_EXPR: |
e60a6f7b | 3882 | expr = build_binary_op (EXPR_LOCATION (expr), |
8e70fb09 | 3883 | (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
95809de4 | 3884 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
8e70fb09 | 3885 | c_common_truthvalue_conversion (location, |
3886 | TREE_OPERAND (expr, 0)), | |
3887 | c_common_truthvalue_conversion (location, | |
3888 | TREE_OPERAND (expr, 1)), | |
2203bd5c | 3889 | 0); |
e60a6f7b | 3890 | goto ret; |
2203bd5c | 3891 | |
b0fc3e72 | 3892 | case NEGATE_EXPR: |
3893 | case ABS_EXPR: | |
3894 | case FLOAT_EXPR: | |
c6418a4e | 3895 | case EXCESS_PRECISION_EXPR: |
d10cfa8d | 3896 | /* These don't change whether an object is nonzero or zero. */ |
8e70fb09 | 3897 | return c_common_truthvalue_conversion (location, TREE_OPERAND (expr, 0)); |
b0fc3e72 | 3898 | |
3899 | case LROTATE_EXPR: | |
3900 | case RROTATE_EXPR: | |
d10cfa8d | 3901 | /* These don't change whether an object is zero or nonzero, but |
b0fc3e72 | 3902 | we can't ignore them if their second arg has side-effects. */ |
3903 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
e60a6f7b | 3904 | { |
3905 | expr = build2 (COMPOUND_EXPR, truthvalue_type_node, | |
3906 | TREE_OPERAND (expr, 1), | |
48e1416a | 3907 | c_common_truthvalue_conversion |
e60a6f7b | 3908 | (location, TREE_OPERAND (expr, 0))); |
3909 | goto ret; | |
3910 | } | |
b0fc3e72 | 3911 | else |
8e70fb09 | 3912 | return c_common_truthvalue_conversion (location, |
3913 | TREE_OPERAND (expr, 0)); | |
73be5127 | 3914 | |
b0fc3e72 | 3915 | case COND_EXPR: |
3916 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
a75b1c71 | 3917 | if (c_dialect_cxx ()) |
e60a6f7b | 3918 | { |
389dd41b | 3919 | expr = fold_build3_loc (location, COND_EXPR, truthvalue_type_node, |
e60a6f7b | 3920 | TREE_OPERAND (expr, 0), |
3921 | c_common_truthvalue_conversion (location, | |
3922 | TREE_OPERAND (expr, | |
3923 | 1)), | |
3924 | c_common_truthvalue_conversion (location, | |
3925 | TREE_OPERAND (expr, | |
3926 | 2))); | |
3927 | goto ret; | |
3928 | } | |
a75b1c71 | 3929 | else |
e60a6f7b | 3930 | { |
3931 | /* Folding will happen later for C. */ | |
3932 | expr = build3 (COND_EXPR, truthvalue_type_node, | |
3933 | TREE_OPERAND (expr, 0), | |
3934 | c_common_truthvalue_conversion (location, | |
3935 | TREE_OPERAND (expr, 1)), | |
3936 | c_common_truthvalue_conversion (location, | |
3937 | TREE_OPERAND (expr, 2))); | |
3938 | goto ret; | |
3939 | } | |
b0fc3e72 | 3940 | |
72dd6141 | 3941 | CASE_CONVERT: |
b0fc3e72 | 3942 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
3943 | since that affects how `default_conversion' will behave. */ | |
3944 | if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE | |
3945 | || TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE) | |
3946 | break; | |
b0fc3e72 | 3947 | /* If this is widening the argument, we can ignore it. */ |
3948 | if (TYPE_PRECISION (TREE_TYPE (expr)) | |
3949 | >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0)))) | |
8e70fb09 | 3950 | return c_common_truthvalue_conversion (location, |
3951 | TREE_OPERAND (expr, 0)); | |
b0fc3e72 | 3952 | break; |
3953 | ||
16837b18 | 3954 | case MODIFY_EXPR: |
60a0513e | 3955 | if (!TREE_NO_WARNING (expr) |
3956 | && warn_parentheses) | |
3957 | { | |
3958 | warning (OPT_Wparentheses, | |
3959 | "suggest parentheses around assignment used as truth value"); | |
3960 | TREE_NO_WARNING (expr) = 1; | |
3961 | } | |
16837b18 | 3962 | break; |
73be5127 | 3963 | |
31f820d2 | 3964 | default: |
3965 | break; | |
b0fc3e72 | 3966 | } |
3967 | ||
2ba726d2 | 3968 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
a0748b7d | 3969 | { |
93be21c0 | 3970 | tree t = (in_late_binary_op ? save_expr (expr) : c_save_expr (expr)); |
e60a6f7b | 3971 | expr = (build_binary_op |
8e70fb09 | 3972 | (EXPR_LOCATION (expr), |
3973 | (TREE_SIDE_EFFECTS (expr) | |
a0748b7d | 3974 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
b6889cb0 | 3975 | c_common_truthvalue_conversion |
3976 | (location, | |
3977 | build_unary_op (location, REALPART_EXPR, t, 0)), | |
3978 | c_common_truthvalue_conversion | |
3979 | (location, | |
3980 | build_unary_op (location, IMAGPART_EXPR, t, 0)), | |
a0748b7d | 3981 | 0)); |
e60a6f7b | 3982 | goto ret; |
a0748b7d | 3983 | } |
2ba726d2 | 3984 | |
9421ebb9 | 3985 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
3986 | { | |
3987 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
3988 | FCONST0 (TYPE_MODE | |
3989 | (TREE_TYPE (expr)))); | |
43158006 | 3990 | return build_binary_op (location, NE_EXPR, expr, fixed_zero_node, 1); |
9421ebb9 | 3991 | } |
e60a6f7b | 3992 | else |
3993 | return build_binary_op (location, NE_EXPR, expr, integer_zero_node, 1); | |
9421ebb9 | 3994 | |
e60a6f7b | 3995 | ret: |
3996 | protected_set_expr_location (expr, location); | |
3997 | return expr; | |
b0fc3e72 | 3998 | } |
3999 | \f | |
3237155d | 4000 | static void def_builtin_1 (enum built_in_function fncode, |
4001 | const char *name, | |
4002 | enum built_in_class fnclass, | |
4003 | tree fntype, tree libtype, | |
4004 | bool both_p, bool fallback_p, bool nonansi_p, | |
4005 | tree fnattrs, bool implicit_p); | |
0d4238dc | 4006 | |
a5b1863e | 4007 | |
4008 | /* Apply the TYPE_QUALS to the new DECL. */ | |
4009 | ||
4010 | void | |
1cae46be | 4011 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
a5b1863e | 4012 | { |
adfb367f | 4013 | tree type = TREE_TYPE (decl); |
b27ac6b5 | 4014 | |
e4eabbe4 | 4015 | if (type == error_mark_node) |
4016 | return; | |
adfb367f | 4017 | |
4018 | if (((type_quals & TYPE_QUAL_CONST) | |
4019 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
4020 | /* An object declared 'const' is only readonly after it is | |
4021 | initialized. We don't have any way of expressing this currently, | |
4022 | so we need to be conservative and unset TREE_READONLY for types | |
4023 | with constructors. Otherwise aliasing code will ignore stores in | |
4024 | an inline constructor. */ | |
4025 | && !(type && TYPE_NEEDS_CONSTRUCTING (type))) | |
a5b1863e | 4026 | TREE_READONLY (decl) = 1; |
4027 | if (type_quals & TYPE_QUAL_VOLATILE) | |
4028 | { | |
4029 | TREE_SIDE_EFFECTS (decl) = 1; | |
4030 | TREE_THIS_VOLATILE (decl) = 1; | |
4031 | } | |
d91a20bc | 4032 | if (type_quals & TYPE_QUAL_RESTRICT) |
a5b1863e | 4033 | { |
adfb367f | 4034 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
4035 | /* Allow 'restrict' on arrays of pointers. | |
4036 | FIXME currently we just ignore it. */ | |
4037 | type = TREE_TYPE (type); | |
4038 | if (!type | |
4039 | || !POINTER_TYPE_P (type) | |
4040 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
b0b1af64 | 4041 | error ("invalid use of %<restrict%>"); |
a5b1863e | 4042 | } |
4043 | } | |
4044 | ||
4ee9c684 | 4045 | /* Hash function for the problem of multiple type definitions in |
4046 | different files. This must hash all types that will compare | |
4047 | equal via comptypes to the same value. In practice it hashes | |
0bed3869 | 4048 | on some of the simple stuff and leaves the details to comptypes. */ |
4ee9c684 | 4049 | |
4050 | static hashval_t | |
4051 | c_type_hash (const void *p) | |
4052 | { | |
ecf2703d | 4053 | int n_elements; |
4ee9c684 | 4054 | int shift, size; |
aae87fc3 | 4055 | const_tree const t = (const_tree) p; |
4ee9c684 | 4056 | tree t2; |
4057 | switch (TREE_CODE (t)) | |
4058 | { | |
fbf0afd1 | 4059 | /* For pointers, hash on pointee type plus some swizzling. */ |
2363ef00 | 4060 | case POINTER_TYPE: |
4061 | return c_type_hash (TREE_TYPE (t)) ^ 0x3003003; | |
4062 | /* Hash on number of elements and total size. */ | |
4063 | case ENUMERAL_TYPE: | |
4064 | shift = 3; | |
4065 | t2 = TYPE_VALUES (t); | |
4066 | break; | |
4067 | case RECORD_TYPE: | |
4068 | shift = 0; | |
4069 | t2 = TYPE_FIELDS (t); | |
4070 | break; | |
4071 | case QUAL_UNION_TYPE: | |
4072 | shift = 1; | |
4073 | t2 = TYPE_FIELDS (t); | |
4074 | break; | |
4075 | case UNION_TYPE: | |
4076 | shift = 2; | |
4077 | t2 = TYPE_FIELDS (t); | |
4078 | break; | |
4079 | default: | |
231bd014 | 4080 | gcc_unreachable (); |
4ee9c684 | 4081 | } |
ecf2703d | 4082 | /* FIXME: We want to use a DECL_CHAIN iteration method here, but |
4083 | TYPE_VALUES of ENUMERAL_TYPEs is stored as a TREE_LIST. */ | |
4084 | n_elements = list_length (t2); | |
78c2e180 | 4085 | /* We might have a VLA here. */ |
4086 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
4087 | size = 0; | |
4088 | else | |
4089 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); | |
ecf2703d | 4090 | return ((size << 24) | (n_elements << shift)); |
4ee9c684 | 4091 | } |
4092 | ||
1ecd4018 | 4093 | static GTY((param_is (union tree_node))) htab_t type_hash_table; |
4094 | ||
b5ba9f3a | 4095 | /* Return the typed-based alias set for T, which may be an expression |
f7c44134 | 4096 | or a type. Return -1 if we don't do anything special. */ |
b5ba9f3a | 4097 | |
32c2fdea | 4098 | alias_set_type |
1cae46be | 4099 | c_common_get_alias_set (tree t) |
b5ba9f3a | 4100 | { |
be4f2de7 | 4101 | tree u; |
4ee9c684 | 4102 | PTR *slot; |
1cae46be | 4103 | |
e58c17e7 | 4104 | /* For VLAs, use the alias set of the element type rather than the |
4105 | default of alias set 0 for types compared structurally. */ | |
4106 | if (TYPE_P (t) && TYPE_STRUCTURAL_EQUALITY_P (t)) | |
4107 | { | |
4108 | if (TREE_CODE (t) == ARRAY_TYPE) | |
4109 | return get_alias_set (TREE_TYPE (t)); | |
4110 | return -1; | |
4111 | } | |
4112 | ||
be4f2de7 | 4113 | /* Permit type-punning when accessing a union, provided the access |
4114 | is directly through the union. For example, this code does not | |
4115 | permit taking the address of a union member and then storing | |
4116 | through it. Even the type-punning allowed here is a GCC | |
4117 | extension, albeit a common and useful one; the C standard says | |
4118 | that such accesses have implementation-defined behavior. */ | |
4119 | for (u = t; | |
4120 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
4121 | u = TREE_OPERAND (u, 0)) | |
4122 | if (TREE_CODE (u) == COMPONENT_REF | |
4123 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
4124 | return 0; | |
1e2513d9 | 4125 | |
9fcc3e54 | 4126 | /* That's all the expressions we handle specially. */ |
84166705 | 4127 | if (!TYPE_P (t)) |
9fcc3e54 | 4128 | return -1; |
4129 | ||
d716ce75 | 4130 | /* The C standard guarantees that any object may be accessed via an |
9fcc3e54 | 4131 | lvalue that has character type. */ |
4132 | if (t == char_type_node | |
4133 | || t == signed_char_type_node | |
4134 | || t == unsigned_char_type_node) | |
f7c44134 | 4135 | return 0; |
a5b1863e | 4136 | |
1607663f | 4137 | /* The C standard specifically allows aliasing between signed and |
4138 | unsigned variants of the same type. We treat the signed | |
4139 | variant as canonical. */ | |
78a8ed03 | 4140 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
a8868e19 | 4141 | { |
4070745f | 4142 | tree t1 = c_common_signed_type (t); |
1607663f | 4143 | |
a8868e19 | 4144 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
4145 | if (t1 != t) | |
4146 | return get_alias_set (t1); | |
4147 | } | |
1e2513d9 | 4148 | |
4ee9c684 | 4149 | /* Handle the case of multiple type nodes referring to "the same" type, |
4150 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
4151 | C90 is handled. (In C99 type compatibility is not transitive, which | |
4152 | complicates things mightily. The alias set splay trees can theoretically | |
4153 | represent this, but insertion is tricky when you consider all the | |
4154 | different orders things might arrive in.) */ | |
4155 | ||
4156 | if (c_language != clk_c || flag_isoc99) | |
4157 | return -1; | |
4158 | ||
0bed3869 | 4159 | /* Save time if there's only one input file. */ |
e08bd2f4 | 4160 | if (num_in_fnames == 1) |
4ee9c684 | 4161 | return -1; |
4162 | ||
4163 | /* Pointers need special handling if they point to any type that | |
4164 | needs special handling (below). */ | |
4165 | if (TREE_CODE (t) == POINTER_TYPE) | |
4166 | { | |
4167 | tree t2; | |
4168 | /* Find bottom type under any nested POINTERs. */ | |
b27ac6b5 | 4169 | for (t2 = TREE_TYPE (t); |
af592f67 | 4170 | TREE_CODE (t2) == POINTER_TYPE; |
4171 | t2 = TREE_TYPE (t2)) | |
4172 | ; | |
b27ac6b5 | 4173 | if (TREE_CODE (t2) != RECORD_TYPE |
af592f67 | 4174 | && TREE_CODE (t2) != ENUMERAL_TYPE |
4175 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
4176 | && TREE_CODE (t2) != UNION_TYPE) | |
4177 | return -1; | |
4ee9c684 | 4178 | if (TYPE_SIZE (t2) == 0) |
af592f67 | 4179 | return -1; |
4ee9c684 | 4180 | } |
4181 | /* These are the only cases that need special handling. */ | |
b27ac6b5 | 4182 | if (TREE_CODE (t) != RECORD_TYPE |
4ee9c684 | 4183 | && TREE_CODE (t) != ENUMERAL_TYPE |
4184 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
4185 | && TREE_CODE (t) != UNION_TYPE | |
4186 | && TREE_CODE (t) != POINTER_TYPE) | |
4187 | return -1; | |
4188 | /* Undefined? */ | |
4189 | if (TYPE_SIZE (t) == 0) | |
4190 | return -1; | |
4191 | ||
b27ac6b5 | 4192 | /* Look up t in hash table. Only one of the compatible types within each |
4ee9c684 | 4193 | alias set is recorded in the table. */ |
4194 | if (!type_hash_table) | |
1ecd4018 | 4195 | type_hash_table = htab_create_ggc (1021, c_type_hash, |
4ee9c684 | 4196 | (htab_eq) lang_hooks.types_compatible_p, |
4197 | NULL); | |
4198 | slot = htab_find_slot (type_hash_table, t, INSERT); | |
4199 | if (*slot != NULL) | |
ad16cb2c | 4200 | { |
4201 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
4202 | return TYPE_ALIAS_SET ((tree)*slot); | |
4203 | } | |
4ee9c684 | 4204 | else |
4205 | /* Our caller will assign and record (in t) a new alias set; all we need | |
4206 | to do is remember t in the hash table. */ | |
4207 | *slot = t; | |
4208 | ||
f7c44134 | 4209 | return -1; |
b5ba9f3a | 4210 | } |
902b4e01 | 4211 | \f |
e60a6f7b | 4212 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where |
4213 | the second parameter indicates which OPERATOR is being applied. | |
4214 | The COMPLAIN flag controls whether we should diagnose possibly | |
4215 | ill-formed constructs or not. LOC is the location of the SIZEOF or | |
4216 | TYPEOF operator. */ | |
908c697e | 4217 | |
902b4e01 | 4218 | tree |
e60a6f7b | 4219 | c_sizeof_or_alignof_type (location_t loc, |
4220 | tree type, bool is_sizeof, int complain) | |
902b4e01 | 4221 | { |
d4c4d95c | 4222 | const char *op_name; |
4223 | tree value = NULL; | |
4224 | enum tree_code type_code = TREE_CODE (type); | |
1cae46be | 4225 | |
908c697e | 4226 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
1cae46be | 4227 | |
d4c4d95c | 4228 | if (type_code == FUNCTION_TYPE) |
902b4e01 | 4229 | { |
908c697e | 4230 | if (is_sizeof) |
d4c4d95c | 4231 | { |
d3a4d008 | 4232 | if (complain && (pedantic || warn_pointer_arith)) |
48e1416a | 4233 | pedwarn (loc, pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
8864917d | 4234 | "invalid application of %<sizeof%> to a function type"); |
ebd21de4 | 4235 | else if (!complain) |
4236 | return error_mark_node; | |
d4c4d95c | 4237 | value = size_one_node; |
4238 | } | |
4239 | else | |
4240 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
4241 | } | |
4242 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
4243 | { | |
1cae46be | 4244 | if (type_code == VOID_TYPE |
d3a4d008 | 4245 | && complain && (pedantic || warn_pointer_arith)) |
48e1416a | 4246 | pedwarn (loc, pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
8864917d | 4247 | "invalid application of %qs to a void type", op_name); |
ebd21de4 | 4248 | else if (!complain) |
4249 | return error_mark_node; | |
d4c4d95c | 4250 | value = size_one_node; |
902b4e01 | 4251 | } |
902b4e01 | 4252 | else if (!COMPLETE_TYPE_P (type)) |
4253 | { | |
d3a4d008 | 4254 | if (complain) |
e60a6f7b | 4255 | error_at (loc, "invalid application of %qs to incomplete type %qT ", |
4256 | op_name, type); | |
9c719c74 | 4257 | return error_mark_node; |
902b4e01 | 4258 | } |
4259 | else | |
d4c4d95c | 4260 | { |
908c697e | 4261 | if (is_sizeof) |
d4c4d95c | 4262 | /* Convert in case a char is more than one unit. */ |
389dd41b | 4263 | value = size_binop_loc (loc, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
4264 | size_int (TYPE_PRECISION (char_type_node) | |
4265 | / BITS_PER_UNIT)); | |
d4c4d95c | 4266 | else |
d37625c0 | 4267 | value = size_int (TYPE_ALIGN_UNIT (type)); |
d4c4d95c | 4268 | } |
902b4e01 | 4269 | |
d4c4d95c | 4270 | /* VALUE will have an integer type with TYPE_IS_SIZETYPE set. |
4271 | TYPE_IS_SIZETYPE means that certain things (like overflow) will | |
4272 | never happen. However, this node should really have type | |
4273 | `size_t', which is just a typedef for an ordinary integer type. */ | |
389dd41b | 4274 | value = fold_convert_loc (loc, size_type_node, value); |
1d8fc210 | 4275 | gcc_assert (!TYPE_IS_SIZETYPE (TREE_TYPE (value))); |
1cae46be | 4276 | |
d4c4d95c | 4277 | return value; |
902b4e01 | 4278 | } |
4279 | ||
4280 | /* Implement the __alignof keyword: Return the minimum required | |
097b5c8b | 4281 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
4282 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
e60a6f7b | 4283 | from an "aligned" __attribute__ specification). LOC is the |
4284 | location of the ALIGNOF operator. */ | |
72040e7e | 4285 | |
902b4e01 | 4286 | tree |
e60a6f7b | 4287 | c_alignof_expr (location_t loc, tree expr) |
902b4e01 | 4288 | { |
4289 | tree t; | |
4290 | ||
097b5c8b | 4291 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
d37625c0 | 4292 | t = size_int (DECL_ALIGN_UNIT (expr)); |
1cae46be | 4293 | |
902b4e01 | 4294 | else if (TREE_CODE (expr) == COMPONENT_REF |
4295 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
4296 | { | |
e60a6f7b | 4297 | error_at (loc, "%<__alignof%> applied to a bit-field"); |
902b4e01 | 4298 | t = size_one_node; |
4299 | } | |
4300 | else if (TREE_CODE (expr) == COMPONENT_REF | |
7cc7e163 | 4301 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
d37625c0 | 4302 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
1cae46be | 4303 | |
902b4e01 | 4304 | else if (TREE_CODE (expr) == INDIRECT_REF) |
4305 | { | |
4306 | tree t = TREE_OPERAND (expr, 0); | |
4307 | tree best = t; | |
4308 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
1cae46be | 4309 | |
72dd6141 | 4310 | while (CONVERT_EXPR_P (t) |
7cc7e163 | 4311 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
902b4e01 | 4312 | { |
4313 | int thisalign; | |
4314 | ||
4315 | t = TREE_OPERAND (t, 0); | |
4316 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
4317 | if (thisalign > bestalign) | |
4318 | best = t, bestalign = thisalign; | |
4319 | } | |
e60a6f7b | 4320 | return c_alignof (loc, TREE_TYPE (TREE_TYPE (best))); |
902b4e01 | 4321 | } |
4322 | else | |
e60a6f7b | 4323 | return c_alignof (loc, TREE_TYPE (expr)); |
902b4e01 | 4324 | |
389dd41b | 4325 | return fold_convert_loc (loc, size_type_node, t); |
902b4e01 | 4326 | } |
4327 | \f | |
8fe4a266 | 4328 | /* Handle C and C++ default attributes. */ |
4329 | ||
4330 | enum built_in_attribute | |
4331 | { | |
4332 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
4333 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
4334 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, | |
4335 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
8fe4a266 | 4336 | #include "builtin-attrs.def" |
4337 | #undef DEF_ATTR_NULL_TREE | |
4338 | #undef DEF_ATTR_INT | |
4339 | #undef DEF_ATTR_IDENT | |
4340 | #undef DEF_ATTR_TREE_LIST | |
8fe4a266 | 4341 | ATTR_LAST |
4342 | }; | |
4343 | ||
4344 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
4345 | ||
1cae46be | 4346 | static void c_init_attributes (void); |
8fe4a266 | 4347 | |
27213ba3 | 4348 | enum c_builtin_type |
72040e7e | 4349 | { |
d2d4bdde | 4350 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
4351 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
4352 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
4353 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
4354 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
4355 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
0a39fd54 | 4356 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
27213ba3 | 4357 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6) NAME, |
4358 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7) NAME, | |
d2d4bdde | 4359 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
4360 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
4361 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
03901330 | 4362 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
0a39fd54 | 4363 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
4364 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG6) \ | |
4365 | NAME, | |
d2d4bdde | 4366 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
4367 | #include "builtin-types.def" | |
4368 | #undef DEF_PRIMITIVE_TYPE | |
4369 | #undef DEF_FUNCTION_TYPE_0 | |
4370 | #undef DEF_FUNCTION_TYPE_1 | |
4371 | #undef DEF_FUNCTION_TYPE_2 | |
4372 | #undef DEF_FUNCTION_TYPE_3 | |
4373 | #undef DEF_FUNCTION_TYPE_4 | |
0a39fd54 | 4374 | #undef DEF_FUNCTION_TYPE_5 |
4375 | #undef DEF_FUNCTION_TYPE_6 | |
27213ba3 | 4376 | #undef DEF_FUNCTION_TYPE_7 |
d2d4bdde | 4377 | #undef DEF_FUNCTION_TYPE_VAR_0 |
4378 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
4379 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
03901330 | 4380 | #undef DEF_FUNCTION_TYPE_VAR_3 |
0a39fd54 | 4381 | #undef DEF_FUNCTION_TYPE_VAR_4 |
4382 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
d2d4bdde | 4383 | #undef DEF_POINTER_TYPE |
27213ba3 | 4384 | BT_LAST |
4385 | }; | |
4386 | ||
4387 | typedef enum c_builtin_type builtin_type; | |
d2d4bdde | 4388 | |
27213ba3 | 4389 | /* A temporary array for c_common_nodes_and_builtins. Used in |
4390 | communication with def_fn_type. */ | |
4391 | static tree builtin_types[(int) BT_LAST + 1]; | |
d2d4bdde | 4392 | |
27213ba3 | 4393 | /* A helper function for c_common_nodes_and_builtins. Build function type |
4394 | for DEF with return type RET and N arguments. If VAR is true, then the | |
4395 | function should be variadic after those N arguments. | |
4396 | ||
4397 | Takes special care not to ICE if any of the types involved are | |
4398 | error_mark_node, which indicates that said type is not in fact available | |
4399 | (see builtin_type_for_size). In which case the function type as a whole | |
4400 | should be error_mark_node. */ | |
4401 | ||
4402 | static void | |
4403 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
4404 | { | |
4405 | tree args = NULL, t; | |
4406 | va_list list; | |
4407 | int i; | |
4408 | ||
4409 | va_start (list, n); | |
4410 | for (i = 0; i < n; ++i) | |
4411 | { | |
7d339f93 | 4412 | builtin_type a = (builtin_type) va_arg (list, int); |
27213ba3 | 4413 | t = builtin_types[a]; |
4414 | if (t == error_mark_node) | |
4415 | goto egress; | |
4416 | args = tree_cons (NULL_TREE, t, args); | |
4417 | } | |
4418 | va_end (list); | |
4419 | ||
4420 | args = nreverse (args); | |
4421 | if (!var) | |
4422 | args = chainon (args, void_list_node); | |
4423 | ||
4424 | t = builtin_types[ret]; | |
4425 | if (t == error_mark_node) | |
4426 | goto egress; | |
4427 | t = build_function_type (t, args); | |
4428 | ||
4429 | egress: | |
4430 | builtin_types[def] = t; | |
451c8e2f | 4431 | va_end (list); |
27213ba3 | 4432 | } |
4433 | ||
dce22712 | 4434 | /* Build builtin functions common to both C and C++ language |
4435 | frontends. */ | |
4436 | ||
4437 | static void | |
4438 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
4439 | { | |
4440 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
4441 | builtin_types[ENUM] = VALUE; | |
4442 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
4443 | def_fn_type (ENUM, RETURN, 0, 0); | |
4444 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
4445 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
4446 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
4447 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
4448 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
4449 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
4450 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
4451 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
4452 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
4453 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
4454 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
4455 | ARG6) \ | |
4456 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
4457 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
4458 | ARG6, ARG7) \ | |
4459 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
4460 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ | |
4461 | def_fn_type (ENUM, RETURN, 1, 0); | |
4462 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
4463 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
4464 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
4465 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
4466 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
4467 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
4468 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
4469 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
4470 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
4471 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
4472 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ | |
4473 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
4474 | ||
4475 | #include "builtin-types.def" | |
4476 | ||
4477 | #undef DEF_PRIMITIVE_TYPE | |
4478 | #undef DEF_FUNCTION_TYPE_1 | |
4479 | #undef DEF_FUNCTION_TYPE_2 | |
4480 | #undef DEF_FUNCTION_TYPE_3 | |
4481 | #undef DEF_FUNCTION_TYPE_4 | |
4482 | #undef DEF_FUNCTION_TYPE_5 | |
4483 | #undef DEF_FUNCTION_TYPE_6 | |
4484 | #undef DEF_FUNCTION_TYPE_VAR_0 | |
4485 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
4486 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
4487 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
4488 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
4489 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
4490 | #undef DEF_POINTER_TYPE | |
4491 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
4492 | ||
4493 | c_init_attributes (); | |
4494 | ||
4495 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
4496 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
4497 | if (NAME && COND) \ | |
4498 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
4499 | builtin_types[(int) TYPE], \ | |
4500 | builtin_types[(int) LIBTYPE], \ | |
4501 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
4502 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
4503 | #include "builtins.def" | |
4504 | #undef DEF_BUILTIN | |
4505 | ||
87eb1c28 | 4506 | targetm.init_builtins (); |
4507 | ||
471eff36 | 4508 | build_common_builtin_nodes (); |
dce22712 | 4509 | |
dce22712 | 4510 | if (flag_mudflap) |
4511 | mudflap_init (); | |
4512 | } | |
4513 | ||
9e6687c8 | 4514 | /* Like get_identifier, but avoid warnings about null arguments when |
4515 | the argument may be NULL for targets where GCC lacks stdint.h type | |
4516 | information. */ | |
4517 | ||
4518 | static inline tree | |
4519 | c_get_ident (const char *id) | |
4520 | { | |
4521 | return get_identifier (id); | |
4522 | } | |
4523 | ||
27213ba3 | 4524 | /* Build tree nodes and builtin functions common to both C and C++ language |
4525 | frontends. */ | |
4526 | ||
4527 | void | |
4528 | c_common_nodes_and_builtins (void) | |
4529 | { | |
924bbf02 | 4530 | int char16_type_size; |
4531 | int char32_type_size; | |
174fcc61 | 4532 | int wchar_type_size; |
4533 | tree array_domain_type; | |
2d47cc32 | 4534 | tree va_list_ref_type_node; |
8a15c04a | 4535 | tree va_list_arg_type_node; |
a66c9326 | 4536 | |
174fcc61 | 4537 | /* Define `int' and `char' first so that dbx will output them first. */ |
d946ea19 | 4538 | record_builtin_type (RID_INT, NULL, integer_type_node); |
174fcc61 | 4539 | record_builtin_type (RID_CHAR, "char", char_type_node); |
4540 | ||
4541 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
4542 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
4543 | but not C. Are the conditionals here needed? */ | |
c0f19401 | 4544 | if (c_dialect_cxx ()) |
d946ea19 | 4545 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
174fcc61 | 4546 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
4547 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
4548 | record_builtin_type (RID_MAX, "long unsigned int", | |
4549 | long_unsigned_type_node); | |
6388cfe2 | 4550 | if (int128_integer_type_node != NULL_TREE) |
4551 | { | |
4552 | record_builtin_type (RID_INT128, "__int128", | |
4553 | int128_integer_type_node); | |
4554 | record_builtin_type (RID_MAX, "__int128 unsigned", | |
4555 | int128_unsigned_type_node); | |
4556 | } | |
c0f19401 | 4557 | if (c_dialect_cxx ()) |
174fcc61 | 4558 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
4559 | record_builtin_type (RID_MAX, "long long int", | |
4560 | long_long_integer_type_node); | |
4561 | record_builtin_type (RID_MAX, "long long unsigned int", | |
4562 | long_long_unsigned_type_node); | |
c0f19401 | 4563 | if (c_dialect_cxx ()) |
174fcc61 | 4564 | record_builtin_type (RID_MAX, "long long unsigned", |
4565 | long_long_unsigned_type_node); | |
4566 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
4567 | record_builtin_type (RID_MAX, "short unsigned int", | |
4568 | short_unsigned_type_node); | |
c0f19401 | 4569 | if (c_dialect_cxx ()) |
174fcc61 | 4570 | record_builtin_type (RID_MAX, "unsigned short", |
4571 | short_unsigned_type_node); | |
4572 | ||
4573 | /* Define both `signed char' and `unsigned char'. */ | |
4574 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
4575 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
4576 | ||
771d21fa | 4577 | /* These are types that c_common_type_for_size and |
4578 | c_common_type_for_mode use. */ | |
e60a6f7b | 4579 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4580 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4581 | intQI_type_node)); |
e60a6f7b | 4582 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4583 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4584 | intHI_type_node)); |
e60a6f7b | 4585 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4586 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4587 | intSI_type_node)); |
e60a6f7b | 4588 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4589 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4590 | intDI_type_node)); |
174fcc61 | 4591 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 4592 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 4593 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4594 | TYPE_DECL, | |
f1515a39 | 4595 | get_identifier ("__int128_t"), |
4596 | intTI_type_node)); | |
174fcc61 | 4597 | #endif |
e60a6f7b | 4598 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4599 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4600 | unsigned_intQI_type_node)); |
e60a6f7b | 4601 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4602 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4603 | unsigned_intHI_type_node)); |
e60a6f7b | 4604 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4605 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4606 | unsigned_intSI_type_node)); |
e60a6f7b | 4607 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4608 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4609 | unsigned_intDI_type_node)); |
174fcc61 | 4610 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 4611 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 4612 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4613 | TYPE_DECL, | |
f1515a39 | 4614 | get_identifier ("__uint128_t"), |
4615 | unsigned_intTI_type_node)); | |
174fcc61 | 4616 | #endif |
4617 | ||
4618 | /* Create the widest literal types. */ | |
4619 | widest_integer_literal_type_node | |
4620 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 4621 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4622 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4623 | widest_integer_literal_type_node)); |
174fcc61 | 4624 | |
4625 | widest_unsigned_literal_type_node | |
4626 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
e60a6f7b | 4627 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4628 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4629 | widest_unsigned_literal_type_node)); |
174fcc61 | 4630 | |
4631 | /* `unsigned long' is the standard type for sizeof. | |
4632 | Note that stddef.h uses `unsigned long', | |
4633 | and this must agree, even if long and int are the same size. */ | |
654ef926 | 4634 | size_type_node = |
174fcc61 | 4635 | TREE_TYPE (identifier_global_value (get_identifier (SIZE_TYPE))); |
654ef926 | 4636 | signed_size_type_node = c_common_signed_type (size_type_node); |
4637 | set_sizetype (size_type_node); | |
174fcc61 | 4638 | |
73673831 | 4639 | pid_type_node = |
4640 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
4641 | ||
174fcc61 | 4642 | build_common_tree_nodes_2 (flag_short_double); |
4643 | ||
d946ea19 | 4644 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
4645 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
174fcc61 | 4646 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
4647 | ||
c4503c0a | 4648 | /* Only supported decimal floating point extension if the target |
4649 | actually supports underlying modes. */ | |
48e1416a | 4650 | if (targetm.scalar_mode_supported_p (SDmode) |
c4503c0a | 4651 | && targetm.scalar_mode_supported_p (DDmode) |
4652 | && targetm.scalar_mode_supported_p (TDmode)) | |
4653 | { | |
4654 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
4655 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
4656 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
4657 | } | |
4658 | ||
9421ebb9 | 4659 | if (targetm.fixed_point_supported_p ()) |
4660 | { | |
4661 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
4662 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
4663 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
4664 | record_builtin_type (RID_MAX, "long long _Fract", | |
4665 | long_long_fract_type_node); | |
4666 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
4667 | unsigned_short_fract_type_node); | |
4668 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
4669 | unsigned_fract_type_node); | |
4670 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
4671 | unsigned_long_fract_type_node); | |
4672 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
4673 | unsigned_long_long_fract_type_node); | |
4674 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
4675 | sat_short_fract_type_node); | |
4676 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
4677 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
4678 | sat_long_fract_type_node); | |
4679 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
4680 | sat_long_long_fract_type_node); | |
4681 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
4682 | sat_unsigned_short_fract_type_node); | |
4683 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
4684 | sat_unsigned_fract_type_node); | |
4685 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
4686 | sat_unsigned_long_fract_type_node); | |
4687 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
4688 | sat_unsigned_long_long_fract_type_node); | |
4689 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
4690 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
4691 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
4692 | record_builtin_type (RID_MAX, "long long _Accum", | |
4693 | long_long_accum_type_node); | |
4694 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
4695 | unsigned_short_accum_type_node); | |
4696 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
4697 | unsigned_accum_type_node); | |
4698 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
4699 | unsigned_long_accum_type_node); | |
4700 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
4701 | unsigned_long_long_accum_type_node); | |
4702 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
4703 | sat_short_accum_type_node); | |
4704 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
4705 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
4706 | sat_long_accum_type_node); | |
4707 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
4708 | sat_long_long_accum_type_node); | |
4709 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
4710 | sat_unsigned_short_accum_type_node); | |
4711 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
4712 | sat_unsigned_accum_type_node); | |
4713 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
4714 | sat_unsigned_long_accum_type_node); | |
4715 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
4716 | sat_unsigned_long_long_accum_type_node); | |
4717 | ||
4718 | } | |
4719 | ||
e60a6f7b | 4720 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4721 | TYPE_DECL, | |
dc24ddbd | 4722 | get_identifier ("complex int"), |
4723 | complex_integer_type_node)); | |
e60a6f7b | 4724 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4725 | TYPE_DECL, | |
dc24ddbd | 4726 | get_identifier ("complex float"), |
4727 | complex_float_type_node)); | |
e60a6f7b | 4728 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4729 | TYPE_DECL, | |
dc24ddbd | 4730 | get_identifier ("complex double"), |
4731 | complex_double_type_node)); | |
4732 | lang_hooks.decls.pushdecl | |
e60a6f7b | 4733 | (build_decl (UNKNOWN_LOCATION, |
4734 | TYPE_DECL, get_identifier ("complex long double"), | |
20325f61 | 4735 | complex_long_double_type_node)); |
174fcc61 | 4736 | |
e256d445 | 4737 | if (c_dialect_cxx ()) |
4738 | /* For C++, make fileptr_type_node a distinct void * type until | |
4739 | FILE type is defined. */ | |
e086912e | 4740 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
e256d445 | 4741 | |
d946ea19 | 4742 | record_builtin_type (RID_VOID, NULL, void_type_node); |
174fcc61 | 4743 | |
6753bca0 | 4744 | /* Set the TYPE_NAME for any variants that were built before |
4745 | record_builtin_type gave names to the built-in types. */ | |
4746 | { | |
4747 | tree void_name = TYPE_NAME (void_type_node); | |
4748 | TYPE_NAME (void_type_node) = NULL_TREE; | |
4749 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
4750 | = void_name; | |
4751 | TYPE_NAME (void_type_node) = void_name; | |
4752 | } | |
4753 | ||
fbf0afd1 | 4754 | /* This node must not be shared. */ |
7c446c95 | 4755 | void_zero_node = make_node (INTEGER_CST); |
d2d4bdde | 4756 | TREE_TYPE (void_zero_node) = void_type_node; |
4757 | ||
174fcc61 | 4758 | void_list_node = build_void_list_node (); |
4759 | ||
4760 | /* Make a type to be the domain of a few array types | |
4761 | whose domains don't really matter. | |
4762 | 200 is small enough that it always fits in size_t | |
4763 | and large enough that it can hold most function names for the | |
4764 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
4765 | array_domain_type = build_index_type (size_int (200)); | |
4766 | ||
4767 | /* Make a type for arrays of characters. | |
4768 | With luck nothing will ever really depend on the length of this | |
4769 | array type. */ | |
4770 | char_array_type_node | |
4771 | = build_array_type (char_type_node, array_domain_type); | |
4772 | ||
4773 | /* Likewise for arrays of ints. */ | |
4774 | int_array_type_node | |
4775 | = build_array_type (integer_type_node, array_domain_type); | |
4776 | ||
d2d4bdde | 4777 | string_type_node = build_pointer_type (char_type_node); |
4778 | const_string_type_node | |
4779 | = build_pointer_type (build_qualified_type | |
4780 | (char_type_node, TYPE_QUAL_CONST)); | |
4781 | ||
174fcc61 | 4782 | /* This is special for C++ so functions can be overloaded. */ |
18ef7ac2 | 4783 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
174fcc61 | 4784 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
4785 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
f3449a3c | 4786 | underlying_wchar_type_node = wchar_type_node; |
c0f19401 | 4787 | if (c_dialect_cxx ()) |
174fcc61 | 4788 | { |
78a8ed03 | 4789 | if (TYPE_UNSIGNED (wchar_type_node)) |
174fcc61 | 4790 | wchar_type_node = make_unsigned_type (wchar_type_size); |
4791 | else | |
4792 | wchar_type_node = make_signed_type (wchar_type_size); | |
4793 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
4794 | } | |
174fcc61 | 4795 | |
4796 | /* This is for wide string constants. */ | |
4797 | wchar_array_type_node | |
4798 | = build_array_type (wchar_type_node, array_domain_type); | |
4799 | ||
924bbf02 | 4800 | /* Define 'char16_t'. */ |
4801 | char16_type_node = get_identifier (CHAR16_TYPE); | |
4802 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
4803 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
4804 | if (c_dialect_cxx ()) | |
4805 | { | |
4806 | char16_type_node = make_unsigned_type (char16_type_size); | |
4807 | ||
4808 | if (cxx_dialect == cxx0x) | |
4809 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); | |
4810 | } | |
4811 | ||
4812 | /* This is for UTF-16 string constants. */ | |
4813 | char16_array_type_node | |
4814 | = build_array_type (char16_type_node, array_domain_type); | |
4815 | ||
4816 | /* Define 'char32_t'. */ | |
4817 | char32_type_node = get_identifier (CHAR32_TYPE); | |
4818 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
4819 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
4820 | if (c_dialect_cxx ()) | |
4821 | { | |
4822 | char32_type_node = make_unsigned_type (char32_type_size); | |
4823 | ||
4824 | if (cxx_dialect == cxx0x) | |
4825 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); | |
4826 | } | |
4827 | ||
4828 | /* This is for UTF-32 string constants. */ | |
4829 | char32_array_type_node | |
4830 | = build_array_type (char32_type_node, array_domain_type); | |
4831 | ||
6bf5ed8d | 4832 | wint_type_node = |
4833 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
4834 | ||
4835 | intmax_type_node = | |
4836 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
4837 | uintmax_type_node = | |
4838 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
4839 | ||
f3449a3c | 4840 | if (SIG_ATOMIC_TYPE) |
4841 | sig_atomic_type_node = | |
9e6687c8 | 4842 | TREE_TYPE (identifier_global_value (c_get_ident (SIG_ATOMIC_TYPE))); |
f3449a3c | 4843 | if (INT8_TYPE) |
4844 | int8_type_node = | |
9e6687c8 | 4845 | TREE_TYPE (identifier_global_value (c_get_ident (INT8_TYPE))); |
f3449a3c | 4846 | if (INT16_TYPE) |
4847 | int16_type_node = | |
9e6687c8 | 4848 | TREE_TYPE (identifier_global_value (c_get_ident (INT16_TYPE))); |
f3449a3c | 4849 | if (INT32_TYPE) |
4850 | int32_type_node = | |
9e6687c8 | 4851 | TREE_TYPE (identifier_global_value (c_get_ident (INT32_TYPE))); |
f3449a3c | 4852 | if (INT64_TYPE) |
4853 | int64_type_node = | |
9e6687c8 | 4854 | TREE_TYPE (identifier_global_value (c_get_ident (INT64_TYPE))); |
f3449a3c | 4855 | if (UINT8_TYPE) |
4856 | uint8_type_node = | |
9e6687c8 | 4857 | TREE_TYPE (identifier_global_value (c_get_ident (UINT8_TYPE))); |
f3449a3c | 4858 | if (UINT16_TYPE) |
4859 | uint16_type_node = | |
9e6687c8 | 4860 | TREE_TYPE (identifier_global_value (c_get_ident (UINT16_TYPE))); |
f3449a3c | 4861 | if (UINT32_TYPE) |
4862 | c_uint32_type_node = | |
9e6687c8 | 4863 | TREE_TYPE (identifier_global_value (c_get_ident (UINT32_TYPE))); |
f3449a3c | 4864 | if (UINT64_TYPE) |
4865 | c_uint64_type_node = | |
9e6687c8 | 4866 | TREE_TYPE (identifier_global_value (c_get_ident (UINT64_TYPE))); |
f3449a3c | 4867 | if (INT_LEAST8_TYPE) |
4868 | int_least8_type_node = | |
9e6687c8 | 4869 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST8_TYPE))); |
f3449a3c | 4870 | if (INT_LEAST16_TYPE) |
4871 | int_least16_type_node = | |
9e6687c8 | 4872 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST16_TYPE))); |
f3449a3c | 4873 | if (INT_LEAST32_TYPE) |
4874 | int_least32_type_node = | |
9e6687c8 | 4875 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST32_TYPE))); |
f3449a3c | 4876 | if (INT_LEAST64_TYPE) |
4877 | int_least64_type_node = | |
9e6687c8 | 4878 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST64_TYPE))); |
f3449a3c | 4879 | if (UINT_LEAST8_TYPE) |
4880 | uint_least8_type_node = | |
9e6687c8 | 4881 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST8_TYPE))); |
f3449a3c | 4882 | if (UINT_LEAST16_TYPE) |
4883 | uint_least16_type_node = | |
9e6687c8 | 4884 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST16_TYPE))); |
f3449a3c | 4885 | if (UINT_LEAST32_TYPE) |
4886 | uint_least32_type_node = | |
9e6687c8 | 4887 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST32_TYPE))); |
f3449a3c | 4888 | if (UINT_LEAST64_TYPE) |
4889 | uint_least64_type_node = | |
9e6687c8 | 4890 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST64_TYPE))); |
f3449a3c | 4891 | if (INT_FAST8_TYPE) |
4892 | int_fast8_type_node = | |
9e6687c8 | 4893 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST8_TYPE))); |
f3449a3c | 4894 | if (INT_FAST16_TYPE) |
4895 | int_fast16_type_node = | |
9e6687c8 | 4896 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST16_TYPE))); |
f3449a3c | 4897 | if (INT_FAST32_TYPE) |
4898 | int_fast32_type_node = | |
9e6687c8 | 4899 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST32_TYPE))); |
f3449a3c | 4900 | if (INT_FAST64_TYPE) |
4901 | int_fast64_type_node = | |
9e6687c8 | 4902 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST64_TYPE))); |
f3449a3c | 4903 | if (UINT_FAST8_TYPE) |
4904 | uint_fast8_type_node = | |
9e6687c8 | 4905 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST8_TYPE))); |
f3449a3c | 4906 | if (UINT_FAST16_TYPE) |
4907 | uint_fast16_type_node = | |
9e6687c8 | 4908 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST16_TYPE))); |
f3449a3c | 4909 | if (UINT_FAST32_TYPE) |
4910 | uint_fast32_type_node = | |
9e6687c8 | 4911 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST32_TYPE))); |
f3449a3c | 4912 | if (UINT_FAST64_TYPE) |
4913 | uint_fast64_type_node = | |
9e6687c8 | 4914 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST64_TYPE))); |
f3449a3c | 4915 | if (INTPTR_TYPE) |
4916 | intptr_type_node = | |
9e6687c8 | 4917 | TREE_TYPE (identifier_global_value (c_get_ident (INTPTR_TYPE))); |
f3449a3c | 4918 | if (UINTPTR_TYPE) |
4919 | uintptr_type_node = | |
9e6687c8 | 4920 | TREE_TYPE (identifier_global_value (c_get_ident (UINTPTR_TYPE))); |
f3449a3c | 4921 | |
6bf5ed8d | 4922 | default_function_type = build_function_type (integer_type_node, NULL_TREE); |
4923 | ptrdiff_type_node | |
4924 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
11773141 | 4925 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
6bf5ed8d | 4926 | |
dc24ddbd | 4927 | lang_hooks.decls.pushdecl |
e60a6f7b | 4928 | (build_decl (UNKNOWN_LOCATION, |
4929 | TYPE_DECL, get_identifier ("__builtin_va_list"), | |
20325f61 | 4930 | va_list_type_node)); |
202d6e5f | 4931 | if (targetm.enum_va_list_p) |
acd6f472 | 4932 | { |
4933 | int l; | |
4934 | const char *pname; | |
4935 | tree ptype; | |
5f57a8b1 | 4936 | |
202d6e5f | 4937 | for (l = 0; targetm.enum_va_list_p (l, &pname, &ptype); ++l) |
acd6f472 | 4938 | { |
4939 | lang_hooks.decls.pushdecl | |
4940 | (build_decl (UNKNOWN_LOCATION, | |
4941 | TYPE_DECL, get_identifier (pname), | |
4942 | ptype)); | |
4943 | ||
4944 | } | |
4945 | } | |
8a15c04a | 4946 | |
8a15c04a | 4947 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
2d47cc32 | 4948 | { |
4949 | va_list_arg_type_node = va_list_ref_type_node = | |
4950 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
4951 | } | |
8a15c04a | 4952 | else |
2d47cc32 | 4953 | { |
4954 | va_list_arg_type_node = va_list_type_node; | |
4955 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
4956 | } | |
1cae46be | 4957 | |
dce22712 | 4958 | if (!flag_preprocess_only) |
4959 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
ffa8918b | 4960 | |
5c62f199 | 4961 | main_identifier_node = get_identifier ("main"); |
ae84079f | 4962 | |
4963 | /* Create the built-in __null node. It is important that this is | |
4964 | not shared. */ | |
4965 | null_node = make_node (INTEGER_CST); | |
4966 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); | |
27213ba3 | 4967 | |
4968 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
4969 | memset (builtin_types, 0, sizeof (builtin_types)); | |
72040e7e | 4970 | } |
a66c9326 | 4971 | |
79b01846 | 4972 | /* The number of named compound-literals generated thus far. */ |
4973 | static GTY(()) int compound_literal_number; | |
4974 | ||
4975 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
4976 | ||
4977 | void | |
4978 | set_compound_literal_name (tree decl) | |
4979 | { | |
4980 | char *name; | |
4981 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
4982 | compound_literal_number); | |
4983 | compound_literal_number++; | |
4984 | DECL_NAME (decl) = get_identifier (name); | |
4985 | } | |
4986 | ||
a66c9326 | 4987 | tree |
e60a6f7b | 4988 | build_va_arg (location_t loc, tree expr, tree type) |
a66c9326 | 4989 | { |
e60a6f7b | 4990 | expr = build1 (VA_ARG_EXPR, type, expr); |
4991 | SET_EXPR_LOCATION (expr, loc); | |
4992 | return expr; | |
a66c9326 | 4993 | } |
0d4238dc | 4994 | |
4995 | ||
dd878098 | 4996 | /* Linked list of disabled built-in functions. */ |
4997 | ||
4998 | typedef struct disabled_builtin | |
4999 | { | |
5000 | const char *name; | |
5001 | struct disabled_builtin *next; | |
5002 | } disabled_builtin; | |
5003 | static disabled_builtin *disabled_builtins = NULL; | |
5004 | ||
1cae46be | 5005 | static bool builtin_function_disabled_p (const char *); |
dd878098 | 5006 | |
5007 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
5008 | begins with "__builtin_", give an error. */ | |
5009 | ||
5010 | void | |
1cae46be | 5011 | disable_builtin_function (const char *name) |
dd878098 | 5012 | { |
5013 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
b0b1af64 | 5014 | error ("cannot disable built-in function %qs", name); |
dd878098 | 5015 | else |
5016 | { | |
e85905e5 | 5017 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
5018 | new_disabled_builtin->name = name; | |
5019 | new_disabled_builtin->next = disabled_builtins; | |
5020 | disabled_builtins = new_disabled_builtin; | |
dd878098 | 5021 | } |
5022 | } | |
5023 | ||
5024 | ||
5025 | /* Return true if the built-in function NAME has been disabled, false | |
5026 | otherwise. */ | |
5027 | ||
5028 | static bool | |
1cae46be | 5029 | builtin_function_disabled_p (const char *name) |
dd878098 | 5030 | { |
5031 | disabled_builtin *p; | |
5032 | for (p = disabled_builtins; p != NULL; p = p->next) | |
5033 | { | |
5034 | if (strcmp (name, p->name) == 0) | |
5035 | return true; | |
5036 | } | |
5037 | return false; | |
5038 | } | |
5039 | ||
5040 | ||
3237155d | 5041 | /* Worker for DEF_BUILTIN. |
5042 | Possibly define a builtin function with one or two names. | |
5043 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
5044 | nonansi_p and flag_no_nonansi_builtin. */ | |
0d4238dc | 5045 | |
3237155d | 5046 | static void |
5047 | def_builtin_1 (enum built_in_function fncode, | |
5048 | const char *name, | |
5049 | enum built_in_class fnclass, | |
5050 | tree fntype, tree libtype, | |
5051 | bool both_p, bool fallback_p, bool nonansi_p, | |
5052 | tree fnattrs, bool implicit_p) | |
0d4238dc | 5053 | { |
3237155d | 5054 | tree decl; |
5055 | const char *libname; | |
5056 | ||
27213ba3 | 5057 | if (fntype == error_mark_node) |
5058 | return; | |
5059 | ||
3237155d | 5060 | gcc_assert ((!both_p && !fallback_p) |
5061 | || !strncmp (name, "__builtin_", | |
5062 | strlen ("__builtin_"))); | |
5063 | ||
5064 | libname = name + strlen ("__builtin_"); | |
54be5d7e | 5065 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
5066 | (fallback_p ? libname : NULL), | |
5067 | fnattrs); | |
3237155d | 5068 | if (both_p |
5069 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
dd878098 | 5070 | && !(nonansi_p && flag_no_nonansi_builtin)) |
54be5d7e | 5071 | add_builtin_function (libname, libtype, fncode, fnclass, |
5072 | NULL, fnattrs); | |
a40609e6 | 5073 | |
3237155d | 5074 | built_in_decls[(int) fncode] = decl; |
5075 | if (implicit_p) | |
5076 | implicit_built_in_decls[(int) fncode] = decl; | |
0d4238dc | 5077 | } |
e94026da | 5078 | \f |
d7aeef06 | 5079 | /* Nonzero if the type T promotes to int. This is (nearly) the |
5080 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
5081 | ||
5082 | bool | |
9f627b1a | 5083 | c_promoting_integer_type_p (const_tree t) |
d7aeef06 | 5084 | { |
5085 | switch (TREE_CODE (t)) | |
5086 | { | |
5087 | case INTEGER_TYPE: | |
5088 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
5089 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
5090 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
5091 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
7aa1e6eb | 5092 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
5093 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d7aeef06 | 5094 | |
5095 | case ENUMERAL_TYPE: | |
5096 | /* ??? Technically all enumerations not larger than an int | |
5097 | promote to an int. But this is used along code paths | |
5098 | that only want to notice a size change. */ | |
5099 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
5100 | ||
5101 | case BOOLEAN_TYPE: | |
5102 | return 1; | |
5103 | ||
5104 | default: | |
5105 | return 0; | |
5106 | } | |
5107 | } | |
5108 | ||
e94026da | 5109 | /* Return 1 if PARMS specifies a fixed number of parameters |
5110 | and none of their types is affected by default promotions. */ | |
5111 | ||
5112 | int | |
9f627b1a | 5113 | self_promoting_args_p (const_tree parms) |
e94026da | 5114 | { |
9f627b1a | 5115 | const_tree t; |
e94026da | 5116 | for (t = parms; t; t = TREE_CHAIN (t)) |
5117 | { | |
19cb6b50 | 5118 | tree type = TREE_VALUE (t); |
43f74bc4 | 5119 | |
e1d8e198 | 5120 | if (type == error_mark_node) |
5121 | continue; | |
5122 | ||
e94026da | 5123 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
5124 | return 0; | |
5125 | ||
5126 | if (type == 0) | |
5127 | return 0; | |
5128 | ||
5129 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
5130 | return 0; | |
5131 | ||
d7aeef06 | 5132 | if (c_promoting_integer_type_p (type)) |
e94026da | 5133 | return 0; |
5134 | } | |
5135 | return 1; | |
5136 | } | |
605fb01e | 5137 | |
c10de5e7 | 5138 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
5139 | tree | |
5140 | strip_pointer_operator (tree t) | |
5141 | { | |
5142 | while (POINTER_TYPE_P (t)) | |
5143 | t = TREE_TYPE (t); | |
5144 | return t; | |
5145 | } | |
5146 | ||
57a0ed23 | 5147 | /* Recursively remove pointer or array type from TYPE. */ |
5148 | tree | |
5149 | strip_pointer_or_array_types (tree t) | |
5150 | { | |
5151 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
5152 | t = TREE_TYPE (t); | |
5153 | return t; | |
5154 | } | |
5155 | ||
e41f0d80 | 5156 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
5157 | representing case labels, or NULL_TREE for a `default' label. | |
5158 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
5159 | K2, and 0 if K1 and K2 are equal. */ | |
5160 | ||
5161 | int | |
1cae46be | 5162 | case_compare (splay_tree_key k1, splay_tree_key k2) |
e41f0d80 | 5163 | { |
5164 | /* Consider a NULL key (such as arises with a `default' label) to be | |
5165 | smaller than anything else. */ | |
5166 | if (!k1) | |
5167 | return k2 ? -1 : 0; | |
5168 | else if (!k2) | |
5169 | return k1 ? 1 : 0; | |
5170 | ||
5171 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
5172 | } | |
5173 | ||
e60a6f7b | 5174 | /* Process a case label, located at LOC, for the range LOW_VALUE |
5175 | ... HIGH_VALUE. If LOW_VALUE and HIGH_VALUE are both NULL_TREE | |
5176 | then this case label is actually a `default' label. If only | |
5177 | HIGH_VALUE is NULL_TREE, then case label was declared using the | |
5178 | usual C/C++ syntax, rather than the GNU case range extension. | |
5179 | CASES is a tree containing all the case ranges processed so far; | |
5180 | COND is the condition for the switch-statement itself. Returns the | |
5181 | CASE_LABEL_EXPR created, or ERROR_MARK_NODE if no CASE_LABEL_EXPR | |
5182 | is created. */ | |
e41f0d80 | 5183 | |
5184 | tree | |
e60a6f7b | 5185 | c_add_case_label (location_t loc, splay_tree cases, tree cond, tree orig_type, |
2ca392fd | 5186 | tree low_value, tree high_value) |
e41f0d80 | 5187 | { |
5188 | tree type; | |
5189 | tree label; | |
5190 | tree case_label; | |
5191 | splay_tree_node node; | |
5192 | ||
5193 | /* Create the LABEL_DECL itself. */ | |
e60a6f7b | 5194 | label = create_artificial_label (loc); |
e41f0d80 | 5195 | |
5196 | /* If there was an error processing the switch condition, bail now | |
5197 | before we get more confused. */ | |
5198 | if (!cond || cond == error_mark_node) | |
4ee9c684 | 5199 | goto error_out; |
e41f0d80 | 5200 | |
1cae46be | 5201 | if ((low_value && TREE_TYPE (low_value) |
5202 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
e41f0d80 | 5203 | || (high_value && TREE_TYPE (high_value) |
5204 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
b96dc121 | 5205 | { |
e60a6f7b | 5206 | error_at (loc, "pointers are not permitted as case values"); |
b96dc121 | 5207 | goto error_out; |
5208 | } | |
e41f0d80 | 5209 | |
5210 | /* Case ranges are a GNU extension. */ | |
8864917d | 5211 | if (high_value) |
48e1416a | 5212 | pedwarn (loc, OPT_pedantic, |
8864917d | 5213 | "range expressions in switch statements are non-standard"); |
e41f0d80 | 5214 | |
5215 | type = TREE_TYPE (cond); | |
5216 | if (low_value) | |
5217 | { | |
5218 | low_value = check_case_value (low_value); | |
5219 | low_value = convert_and_check (type, low_value); | |
96722196 | 5220 | if (low_value == error_mark_node) |
5221 | goto error_out; | |
e41f0d80 | 5222 | } |
5223 | if (high_value) | |
5224 | { | |
5225 | high_value = check_case_value (high_value); | |
5226 | high_value = convert_and_check (type, high_value); | |
96722196 | 5227 | if (high_value == error_mark_node) |
5228 | goto error_out; | |
e41f0d80 | 5229 | } |
5230 | ||
96722196 | 5231 | if (low_value && high_value) |
5232 | { | |
5233 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
a0c938f0 | 5234 | really a case range, even though it was written that way. |
5235 | Remove the HIGH_VALUE to simplify later processing. */ | |
96722196 | 5236 | if (tree_int_cst_equal (low_value, high_value)) |
5237 | high_value = NULL_TREE; | |
5238 | else if (!tree_int_cst_lt (low_value, high_value)) | |
e60a6f7b | 5239 | warning_at (loc, 0, "empty range specified"); |
96722196 | 5240 | } |
e41f0d80 | 5241 | |
2ca392fd | 5242 | /* See if the case is in range of the type of the original testing |
5243 | expression. If both low_value and high_value are out of range, | |
5244 | don't insert the case label and return NULL_TREE. */ | |
5245 | if (low_value | |
84166705 | 5246 | && !check_case_bounds (type, orig_type, |
5247 | &low_value, high_value ? &high_value : NULL)) | |
2ca392fd | 5248 | return NULL_TREE; |
5249 | ||
e41f0d80 | 5250 | /* Look up the LOW_VALUE in the table of case labels we already |
5251 | have. */ | |
5252 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
5253 | /* If there was not an exact match, check for overlapping ranges. | |
5254 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
5255 | that's a `default' label and the only overlap is an exact match. */ | |
5256 | if (!node && (low_value || high_value)) | |
5257 | { | |
5258 | splay_tree_node low_bound; | |
5259 | splay_tree_node high_bound; | |
5260 | ||
5261 | /* Even though there wasn't an exact match, there might be an | |
5262 | overlap between this case range and another case range. | |
5263 | Since we've (inductively) not allowed any overlapping case | |
5264 | ranges, we simply need to find the greatest low case label | |
5265 | that is smaller that LOW_VALUE, and the smallest low case | |
5266 | label that is greater than LOW_VALUE. If there is an overlap | |
5267 | it will occur in one of these two ranges. */ | |
5268 | low_bound = splay_tree_predecessor (cases, | |
5269 | (splay_tree_key) low_value); | |
5270 | high_bound = splay_tree_successor (cases, | |
5271 | (splay_tree_key) low_value); | |
5272 | ||
5273 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
5274 | the LOW_VALUE, so there is no need to check unless the | |
5275 | LOW_BOUND is in fact itself a case range. */ | |
5276 | if (low_bound | |
5277 | && CASE_HIGH ((tree) low_bound->value) | |
5278 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
5279 | low_value) >= 0) | |
5280 | node = low_bound; | |
5281 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
5282 | range is bigger than the low end of the current range, so we | |
5283 | are only interested if the current range is a real range, and | |
5284 | not an ordinary case label. */ | |
1cae46be | 5285 | else if (high_bound |
e41f0d80 | 5286 | && high_value |
5287 | && (tree_int_cst_compare ((tree) high_bound->key, | |
5288 | high_value) | |
5289 | <= 0)) | |
5290 | node = high_bound; | |
5291 | } | |
5292 | /* If there was an overlap, issue an error. */ | |
5293 | if (node) | |
5294 | { | |
eaae3b75 | 5295 | tree duplicate = CASE_LABEL ((tree) node->value); |
e41f0d80 | 5296 | |
5297 | if (high_value) | |
5298 | { | |
e60a6f7b | 5299 | error_at (loc, "duplicate (or overlapping) case value"); |
5300 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
5301 | "this is the first entry overlapping that value"); | |
e41f0d80 | 5302 | } |
5303 | else if (low_value) | |
5304 | { | |
e60a6f7b | 5305 | error_at (loc, "duplicate case value") ; |
5306 | error_at (DECL_SOURCE_LOCATION (duplicate), "previously used here"); | |
e41f0d80 | 5307 | } |
5308 | else | |
5309 | { | |
e60a6f7b | 5310 | error_at (loc, "multiple default labels in one switch"); |
5311 | error_at (DECL_SOURCE_LOCATION (duplicate), | |
5312 | "this is the first default label"); | |
e41f0d80 | 5313 | } |
4ee9c684 | 5314 | goto error_out; |
e41f0d80 | 5315 | } |
5316 | ||
5317 | /* Add a CASE_LABEL to the statement-tree. */ | |
e60a6f7b | 5318 | case_label = add_stmt (build_case_label (loc, low_value, high_value, label)); |
e41f0d80 | 5319 | /* Register this case label in the splay tree. */ |
1cae46be | 5320 | splay_tree_insert (cases, |
e41f0d80 | 5321 | (splay_tree_key) low_value, |
5322 | (splay_tree_value) case_label); | |
5323 | ||
5324 | return case_label; | |
4ee9c684 | 5325 | |
5326 | error_out: | |
daf6dff5 | 5327 | /* Add a label so that the back-end doesn't think that the beginning of |
4ee9c684 | 5328 | the switch is unreachable. Note that we do not add a case label, as |
a53ff4c1 | 5329 | that just leads to duplicates and thence to failure later on. */ |
4ee9c684 | 5330 | if (!cases->root) |
5331 | { | |
e60a6f7b | 5332 | tree t = create_artificial_label (loc); |
5333 | add_stmt (build_stmt (loc, LABEL_EXPR, t)); | |
4ee9c684 | 5334 | } |
5335 | return error_mark_node; | |
5336 | } | |
5337 | ||
5338 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
5339 | Used to verify that case values match up with enumerator values. */ | |
5340 | ||
5341 | static void | |
5342 | match_case_to_enum_1 (tree key, tree type, tree label) | |
5343 | { | |
5344 | char buf[2 + 2*HOST_BITS_PER_WIDE_INT/4 + 1]; | |
5345 | ||
5346 | /* ??? Not working too hard to print the double-word value. | |
5347 | Should perhaps be done with %lwd in the diagnostic routines? */ | |
5348 | if (TREE_INT_CST_HIGH (key) == 0) | |
5349 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_UNSIGNED, | |
5350 | TREE_INT_CST_LOW (key)); | |
5351 | else if (!TYPE_UNSIGNED (type) | |
5352 | && TREE_INT_CST_HIGH (key) == -1 | |
5353 | && TREE_INT_CST_LOW (key) != 0) | |
5354 | snprintf (buf, sizeof (buf), "-" HOST_WIDE_INT_PRINT_UNSIGNED, | |
5355 | -TREE_INT_CST_LOW (key)); | |
5356 | else | |
5357 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_DOUBLE_HEX, | |
7df7561b | 5358 | (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (key), |
5359 | (unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (key)); | |
4ee9c684 | 5360 | |
5361 | if (TYPE_NAME (type) == 0) | |
712d2297 | 5362 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
5363 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
5364 | "case value %qs not in enumerated type", | |
5365 | buf); | |
4ee9c684 | 5366 | else |
712d2297 | 5367 | warning_at (DECL_SOURCE_LOCATION (CASE_LABEL (label)), |
5368 | warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, | |
5369 | "case value %qs not in enumerated type %qT", | |
5370 | buf, type); | |
4ee9c684 | 5371 | } |
5372 | ||
359d87c6 | 5373 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
5374 | Used to verify that case values match up with enumerator values. */ | |
5375 | ||
4ee9c684 | 5376 | static int |
5377 | match_case_to_enum (splay_tree_node node, void *data) | |
5378 | { | |
5379 | tree label = (tree) node->value; | |
4fd61bc6 | 5380 | tree type = (tree) data; |
4ee9c684 | 5381 | |
5382 | /* Skip default case. */ | |
5383 | if (!CASE_LOW (label)) | |
5384 | return 0; | |
5385 | ||
359d87c6 | 5386 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
4ee9c684 | 5387 | when we did our enum->case scan. Reset our scratch bit after. */ |
359d87c6 | 5388 | if (!CASE_LOW_SEEN (label)) |
4ee9c684 | 5389 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
5390 | else | |
359d87c6 | 5391 | CASE_LOW_SEEN (label) = 0; |
4ee9c684 | 5392 | |
359d87c6 | 5393 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
5394 | not set, that means that CASE_HIGH did not appear when we did our | |
5395 | enum->case scan. Reset our scratch bit after. */ | |
4ee9c684 | 5396 | if (CASE_HIGH (label)) |
5397 | { | |
359d87c6 | 5398 | if (!CASE_HIGH_SEEN (label)) |
5399 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
5400 | else | |
5401 | CASE_HIGH_SEEN (label) = 0; | |
4ee9c684 | 5402 | } |
5403 | ||
5404 | return 0; | |
5405 | } | |
5406 | ||
e7911019 | 5407 | /* Handle -Wswitch*. Called from the front end after parsing the |
5408 | switch construct. */ | |
5409 | /* ??? Should probably be somewhere generic, since other languages | |
5410 | besides C and C++ would want this. At the moment, however, C/C++ | |
5411 | are the only tree-ssa languages that support enumerations at all, | |
5412 | so the point is moot. */ | |
4ee9c684 | 5413 | |
e7911019 | 5414 | void |
5415 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
5416 | tree type, tree cond) | |
4ee9c684 | 5417 | { |
b27ac6b5 | 5418 | splay_tree_node default_node; |
359d87c6 | 5419 | splay_tree_node node; |
5420 | tree chain; | |
4ee9c684 | 5421 | |
5422 | if (!warn_switch && !warn_switch_enum && !warn_switch_default) | |
5423 | return; | |
5424 | ||
4ee9c684 | 5425 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
8b6866af | 5426 | if (!default_node) |
5fb6a912 | 5427 | warning_at (switch_location, OPT_Wswitch_default, |
5428 | "switch missing default case"); | |
4ee9c684 | 5429 | |
359d87c6 | 5430 | /* From here on, we only care about about enumerated types. */ |
5431 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) | |
5432 | return; | |
5433 | ||
561017b5 | 5434 | /* From here on, we only care about -Wswitch and -Wswitch-enum. */ |
5435 | if (!warn_switch_enum && !warn_switch) | |
359d87c6 | 5436 | return; |
5437 | ||
561017b5 | 5438 | /* Check the cases. Warn about case values which are not members of |
5439 | the enumerated type. For -Wswitch-enum, or for -Wswitch when | |
5440 | there is no default case, check that exactly all enumeration | |
5441 | literals are covered by the cases. */ | |
5442 | ||
359d87c6 | 5443 | /* Clearing COND if it is not an integer constant simplifies |
5444 | the tests inside the loop below. */ | |
5445 | if (TREE_CODE (cond) != INTEGER_CST) | |
5446 | cond = NULL_TREE; | |
5447 | ||
5448 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
5449 | common case of monotonically increasing enumerators, it is | |
5450 | O(N), since the nature of the splay tree will keep the next | |
5451 | element adjacent to the root at all times. */ | |
4ee9c684 | 5452 | |
359d87c6 | 5453 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
5454 | { | |
5455 | tree value = TREE_VALUE (chain); | |
3f00a6c0 | 5456 | if (TREE_CODE (value) == CONST_DECL) |
5457 | value = DECL_INITIAL (value); | |
359d87c6 | 5458 | node = splay_tree_lookup (cases, (splay_tree_key) value); |
5459 | if (node) | |
4ee9c684 | 5460 | { |
359d87c6 | 5461 | /* Mark the CASE_LOW part of the case entry as seen. */ |
5462 | tree label = (tree) node->value; | |
5463 | CASE_LOW_SEEN (label) = 1; | |
5464 | continue; | |
5465 | } | |
5466 | ||
5467 | /* Even though there wasn't an exact match, there might be a | |
f0b5f617 | 5468 | case range which includes the enumerator's value. */ |
359d87c6 | 5469 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
5470 | if (node && CASE_HIGH ((tree) node->value)) | |
5471 | { | |
5472 | tree label = (tree) node->value; | |
5473 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
5474 | if (cmp >= 0) | |
4ee9c684 | 5475 | { |
359d87c6 | 5476 | /* If we match the upper bound exactly, mark the CASE_HIGH |
5477 | part of the case entry as seen. */ | |
5478 | if (cmp == 0) | |
5479 | CASE_HIGH_SEEN (label) = 1; | |
5480 | continue; | |
4ee9c684 | 5481 | } |
5482 | } | |
5483 | ||
359d87c6 | 5484 | /* We've now determined that this enumerated literal isn't |
5485 | handled by the case labels of the switch statement. */ | |
4ee9c684 | 5486 | |
359d87c6 | 5487 | /* If the switch expression is a constant, we only really care |
5488 | about whether that constant is handled by the switch. */ | |
5489 | if (cond && tree_int_cst_compare (cond, value)) | |
5490 | continue; | |
4ee9c684 | 5491 | |
6cbbbc89 | 5492 | /* If there is a default_node, the only relevant option is |
561017b5 | 5493 | Wswitch-enum. Otherwise, if both are enabled then we prefer |
6cbbbc89 | 5494 | to warn using -Wswitch because -Wswitch is enabled by -Wall |
5495 | while -Wswitch-enum is explicit. */ | |
561017b5 | 5496 | warning_at (switch_location, |
5497 | (default_node || !warn_switch | |
5498 | ? OPT_Wswitch_enum | |
5499 | : OPT_Wswitch), | |
5500 | "enumeration value %qE not handled in switch", | |
5501 | TREE_PURPOSE (chain)); | |
4ee9c684 | 5502 | } |
359d87c6 | 5503 | |
5504 | /* Warn if there are case expressions that don't correspond to | |
5505 | enumerators. This can occur since C and C++ don't enforce | |
5506 | type-checking of assignments to enumeration variables. | |
5507 | ||
5508 | The time complexity here is now always O(N) worst case, since | |
5509 | we should have marked both the lower bound and upper bound of | |
5510 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
5511 | above. This scan also resets those fields. */ | |
6cbbbc89 | 5512 | |
359d87c6 | 5513 | splay_tree_foreach (cases, match_case_to_enum, type); |
e41f0d80 | 5514 | } |
5515 | ||
9dd48740 | 5516 | /* Finish an expression taking the address of LABEL (an |
dda49785 | 5517 | IDENTIFIER_NODE). Returns an expression for the address. |
5518 | ||
5519 | LOC is the location for the expression returned. */ | |
d0a47c8d | 5520 | |
1cae46be | 5521 | tree |
dda49785 | 5522 | finish_label_address_expr (tree label, location_t loc) |
d0a47c8d | 5523 | { |
5524 | tree result; | |
5525 | ||
21ca8540 | 5526 | pedwarn (input_location, OPT_pedantic, "taking the address of a label is non-standard"); |
d0a47c8d | 5527 | |
9dd48740 | 5528 | if (label == error_mark_node) |
5529 | return error_mark_node; | |
5530 | ||
d0a47c8d | 5531 | label = lookup_label (label); |
5532 | if (label == NULL_TREE) | |
5533 | result = null_pointer_node; | |
5534 | else | |
5535 | { | |
5536 | TREE_USED (label) = 1; | |
5537 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
344cd9b2 | 5538 | /* The current function is not necessarily uninlinable. |
d0a47c8d | 5539 | Computed gotos are incompatible with inlining, but the value |
5540 | here could be used only in a diagnostic, for example. */ | |
dda49785 | 5541 | protected_set_expr_location (result, loc); |
d0a47c8d | 5542 | } |
5543 | ||
5544 | return result; | |
5545 | } | |
4f9a1c9b | 5546 | \f |
5547 | ||
5548 | /* Given a boolean expression ARG, return a tree representing an increment | |
5549 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
5550 | invalid cases (e.g., decrement in C++). */ | |
5551 | tree | |
1cae46be | 5552 | boolean_increment (enum tree_code code, tree arg) |
4f9a1c9b | 5553 | { |
5554 | tree val; | |
69db191c | 5555 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
c0f19401 | 5556 | |
4f9a1c9b | 5557 | arg = stabilize_reference (arg); |
5558 | switch (code) | |
5559 | { | |
5560 | case PREINCREMENT_EXPR: | |
14ae0310 | 5561 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 5562 | break; |
5563 | case POSTINCREMENT_EXPR: | |
14ae0310 | 5564 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 5565 | arg = save_expr (arg); |
14ae0310 | 5566 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5567 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 5568 | break; |
5569 | case PREDECREMENT_EXPR: | |
14ae0310 | 5570 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 5571 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 5572 | break; |
5573 | case POSTDECREMENT_EXPR: | |
14ae0310 | 5574 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 5575 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 5576 | arg = save_expr (arg); |
14ae0310 | 5577 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5578 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 5579 | break; |
5580 | default: | |
231bd014 | 5581 | gcc_unreachable (); |
4f9a1c9b | 5582 | } |
5583 | TREE_SIDE_EFFECTS (val) = 1; | |
5584 | return val; | |
5585 | } | |
76a6e674 | 5586 | \f |
f3449a3c | 5587 | /* Built-in macros for stddef.h and stdint.h, that require macros |
5588 | defined in this file. */ | |
79cf3ec1 | 5589 | void |
1cae46be | 5590 | c_stddef_cpp_builtins(void) |
1ed9d5f5 | 5591 | { |
63994318 | 5592 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
5593 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
5594 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
5595 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
36bccbfc | 5596 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
5597 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
b0726616 | 5598 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
5599 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
f3449a3c | 5600 | if (SIG_ATOMIC_TYPE) |
5601 | builtin_define_with_value ("__SIG_ATOMIC_TYPE__", SIG_ATOMIC_TYPE, 0); | |
5602 | if (INT8_TYPE) | |
5603 | builtin_define_with_value ("__INT8_TYPE__", INT8_TYPE, 0); | |
5604 | if (INT16_TYPE) | |
5605 | builtin_define_with_value ("__INT16_TYPE__", INT16_TYPE, 0); | |
5606 | if (INT32_TYPE) | |
5607 | builtin_define_with_value ("__INT32_TYPE__", INT32_TYPE, 0); | |
5608 | if (INT64_TYPE) | |
5609 | builtin_define_with_value ("__INT64_TYPE__", INT64_TYPE, 0); | |
5610 | if (UINT8_TYPE) | |
5611 | builtin_define_with_value ("__UINT8_TYPE__", UINT8_TYPE, 0); | |
5612 | if (UINT16_TYPE) | |
5613 | builtin_define_with_value ("__UINT16_TYPE__", UINT16_TYPE, 0); | |
5614 | if (UINT32_TYPE) | |
5615 | builtin_define_with_value ("__UINT32_TYPE__", UINT32_TYPE, 0); | |
5616 | if (UINT64_TYPE) | |
5617 | builtin_define_with_value ("__UINT64_TYPE__", UINT64_TYPE, 0); | |
5618 | if (INT_LEAST8_TYPE) | |
5619 | builtin_define_with_value ("__INT_LEAST8_TYPE__", INT_LEAST8_TYPE, 0); | |
5620 | if (INT_LEAST16_TYPE) | |
5621 | builtin_define_with_value ("__INT_LEAST16_TYPE__", INT_LEAST16_TYPE, 0); | |
5622 | if (INT_LEAST32_TYPE) | |
5623 | builtin_define_with_value ("__INT_LEAST32_TYPE__", INT_LEAST32_TYPE, 0); | |
5624 | if (INT_LEAST64_TYPE) | |
5625 | builtin_define_with_value ("__INT_LEAST64_TYPE__", INT_LEAST64_TYPE, 0); | |
5626 | if (UINT_LEAST8_TYPE) | |
5627 | builtin_define_with_value ("__UINT_LEAST8_TYPE__", UINT_LEAST8_TYPE, 0); | |
5628 | if (UINT_LEAST16_TYPE) | |
5629 | builtin_define_with_value ("__UINT_LEAST16_TYPE__", UINT_LEAST16_TYPE, 0); | |
5630 | if (UINT_LEAST32_TYPE) | |
5631 | builtin_define_with_value ("__UINT_LEAST32_TYPE__", UINT_LEAST32_TYPE, 0); | |
5632 | if (UINT_LEAST64_TYPE) | |
5633 | builtin_define_with_value ("__UINT_LEAST64_TYPE__", UINT_LEAST64_TYPE, 0); | |
5634 | if (INT_FAST8_TYPE) | |
5635 | builtin_define_with_value ("__INT_FAST8_TYPE__", INT_FAST8_TYPE, 0); | |
5636 | if (INT_FAST16_TYPE) | |
5637 | builtin_define_with_value ("__INT_FAST16_TYPE__", INT_FAST16_TYPE, 0); | |
5638 | if (INT_FAST32_TYPE) | |
5639 | builtin_define_with_value ("__INT_FAST32_TYPE__", INT_FAST32_TYPE, 0); | |
5640 | if (INT_FAST64_TYPE) | |
5641 | builtin_define_with_value ("__INT_FAST64_TYPE__", INT_FAST64_TYPE, 0); | |
5642 | if (UINT_FAST8_TYPE) | |
5643 | builtin_define_with_value ("__UINT_FAST8_TYPE__", UINT_FAST8_TYPE, 0); | |
5644 | if (UINT_FAST16_TYPE) | |
5645 | builtin_define_with_value ("__UINT_FAST16_TYPE__", UINT_FAST16_TYPE, 0); | |
5646 | if (UINT_FAST32_TYPE) | |
5647 | builtin_define_with_value ("__UINT_FAST32_TYPE__", UINT_FAST32_TYPE, 0); | |
5648 | if (UINT_FAST64_TYPE) | |
5649 | builtin_define_with_value ("__UINT_FAST64_TYPE__", UINT_FAST64_TYPE, 0); | |
5650 | if (INTPTR_TYPE) | |
5651 | builtin_define_with_value ("__INTPTR_TYPE__", INTPTR_TYPE, 0); | |
5652 | if (UINTPTR_TYPE) | |
5653 | builtin_define_with_value ("__UINTPTR_TYPE__", UINTPTR_TYPE, 0); | |
574006c3 | 5654 | } |
5655 | ||
7d3b509a | 5656 | static void |
1cae46be | 5657 | c_init_attributes (void) |
7d3b509a | 5658 | { |
5659 | /* Fill in the built_in_attributes array. */ | |
7c446c95 | 5660 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
7d3b509a | 5661 | built_in_attributes[(int) ENUM] = NULL_TREE; |
7c446c95 | 5662 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
7016c612 | 5663 | built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE); |
7d3b509a | 5664 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
5665 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
5666 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
5667 | built_in_attributes[(int) ENUM] \ | |
5668 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
5669 | built_in_attributes[(int) VALUE], \ | |
5670 | built_in_attributes[(int) CHAIN]); | |
7d3b509a | 5671 | #include "builtin-attrs.def" |
5672 | #undef DEF_ATTR_NULL_TREE | |
5673 | #undef DEF_ATTR_INT | |
5674 | #undef DEF_ATTR_IDENT | |
5675 | #undef DEF_ATTR_TREE_LIST | |
76a6e674 | 5676 | } |
5f3cead1 | 5677 | |
33199a81 | 5678 | /* Returns TRUE iff the attribute indicated by ATTR_ID takes a plain |
5679 | identifier as an argument, so the front end shouldn't look it up. */ | |
5680 | ||
5681 | bool | |
47b19b94 | 5682 | attribute_takes_identifier_p (const_tree attr_id) |
33199a81 | 5683 | { |
9bf1c74e | 5684 | const struct attribute_spec *spec = lookup_attribute_spec (attr_id); |
02cb1060 | 5685 | if (spec == NULL) |
5686 | /* Unknown attribute that we'll end up ignoring, return true so we | |
5687 | don't complain about an identifier argument. */ | |
5688 | return true; | |
5689 | else if (!strcmp ("mode", spec->name) | |
5690 | || !strcmp ("format", spec->name) | |
5691 | || !strcmp ("cleanup", spec->name)) | |
47b19b94 | 5692 | return true; |
5693 | else | |
5694 | return targetm.attribute_takes_identifier_p (attr_id); | |
33199a81 | 5695 | } |
5696 | ||
f8e93a2e | 5697 | /* Attribute handlers common to C front ends. */ |
5698 | ||
5699 | /* Handle a "packed" attribute; arguments as in | |
5700 | struct attribute_spec.handler. */ | |
5701 | ||
5702 | static tree | |
9a03a746 | 5703 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
09347743 | 5704 | int flags, bool *no_add_attrs) |
f8e93a2e | 5705 | { |
f40175cb | 5706 | if (TYPE_P (*node)) |
f8e93a2e | 5707 | { |
5708 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 5709 | *node = build_variant_type_copy (*node); |
f40175cb | 5710 | TYPE_PACKED (*node) = 1; |
f8e93a2e | 5711 | } |
5712 | else if (TREE_CODE (*node) == FIELD_DECL) | |
c2ab04f9 | 5713 | { |
9fd767c5 | 5714 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT |
5715 | /* Still pack bitfields. */ | |
5716 | && ! DECL_INITIAL (*node)) | |
c2ab04f9 | 5717 | warning (OPT_Wattributes, |
5718 | "%qE attribute ignored for field of type %qT", | |
5719 | name, TREE_TYPE (*node)); | |
5720 | else | |
5721 | DECL_PACKED (*node) = 1; | |
5722 | } | |
f8e93a2e | 5723 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
f40175cb | 5724 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
5725 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
5726 | that changes what the typedef is typing. */ | |
f8e93a2e | 5727 | else |
5728 | { | |
9b2d6d13 | 5729 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5730 | *no_add_attrs = true; |
5731 | } | |
5732 | ||
5733 | return NULL_TREE; | |
5734 | } | |
5735 | ||
5736 | /* Handle a "nocommon" attribute; arguments as in | |
5737 | struct attribute_spec.handler. */ | |
5738 | ||
5739 | static tree | |
1cae46be | 5740 | handle_nocommon_attribute (tree *node, tree name, |
9a03a746 | 5741 | tree ARG_UNUSED (args), |
5742 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 5743 | { |
5744 | if (TREE_CODE (*node) == VAR_DECL) | |
5745 | DECL_COMMON (*node) = 0; | |
5746 | else | |
5747 | { | |
9b2d6d13 | 5748 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5749 | *no_add_attrs = true; |
5750 | } | |
5751 | ||
5752 | return NULL_TREE; | |
5753 | } | |
5754 | ||
5755 | /* Handle a "common" attribute; arguments as in | |
5756 | struct attribute_spec.handler. */ | |
5757 | ||
5758 | static tree | |
9a03a746 | 5759 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5760 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 5761 | { |
5762 | if (TREE_CODE (*node) == VAR_DECL) | |
5763 | DECL_COMMON (*node) = 1; | |
5764 | else | |
5765 | { | |
9b2d6d13 | 5766 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5767 | *no_add_attrs = true; |
5768 | } | |
5769 | ||
5770 | return NULL_TREE; | |
5771 | } | |
5772 | ||
5773 | /* Handle a "noreturn" attribute; arguments as in | |
5774 | struct attribute_spec.handler. */ | |
5775 | ||
5776 | static tree | |
9a03a746 | 5777 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5778 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 5779 | { |
5780 | tree type = TREE_TYPE (*node); | |
5781 | ||
5782 | /* See FIXME comment in c_common_attribute_table. */ | |
8c582e4f | 5783 | if (TREE_CODE (*node) == FUNCTION_DECL |
5784 | || objc_method_decl (TREE_CODE (*node))) | |
f8e93a2e | 5785 | TREE_THIS_VOLATILE (*node) = 1; |
5786 | else if (TREE_CODE (type) == POINTER_TYPE | |
5787 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
5788 | TREE_TYPE (*node) | |
5789 | = build_pointer_type | |
5790 | (build_type_variant (TREE_TYPE (type), | |
71bda45d | 5791 | TYPE_READONLY (TREE_TYPE (type)), 1)); |
f8e93a2e | 5792 | else |
5793 | { | |
9b2d6d13 | 5794 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5795 | *no_add_attrs = true; |
5796 | } | |
5797 | ||
5798 | return NULL_TREE; | |
5799 | } | |
5800 | ||
5de92639 | 5801 | /* Handle a "hot" and attribute; arguments as in |
5802 | struct attribute_spec.handler. */ | |
5803 | ||
5804 | static tree | |
5805 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
46f8e3b0 | 5806 | int ARG_UNUSED (flags), bool *no_add_attrs) |
5de92639 | 5807 | { |
5808 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5809 | { | |
5810 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
5811 | { | |
5812 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5813 | name, "cold"); | |
5814 | *no_add_attrs = true; | |
5815 | } | |
24470055 | 5816 | /* Most of the rest of the hot processing is done later with |
5817 | lookup_attribute. */ | |
5de92639 | 5818 | } |
5819 | else | |
5820 | { | |
5821 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5822 | *no_add_attrs = true; | |
5823 | } | |
5824 | ||
5825 | return NULL_TREE; | |
5826 | } | |
5827 | /* Handle a "cold" and attribute; arguments as in | |
5828 | struct attribute_spec.handler. */ | |
5829 | ||
5830 | static tree | |
5831 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
5832 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5833 | { | |
5834 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5835 | { | |
5836 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
5837 | { | |
5838 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5839 | name, "hot"); | |
5840 | *no_add_attrs = true; | |
5841 | } | |
24470055 | 5842 | /* Most of the rest of the cold processing is done later with |
5843 | lookup_attribute. */ | |
5de92639 | 5844 | } |
5845 | else | |
5846 | { | |
5847 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5848 | *no_add_attrs = true; | |
5849 | } | |
5850 | ||
5851 | return NULL_TREE; | |
5852 | } | |
5853 | ||
f8e93a2e | 5854 | /* Handle a "noinline" attribute; arguments as in |
5855 | struct attribute_spec.handler. */ | |
5856 | ||
5857 | static tree | |
1cae46be | 5858 | handle_noinline_attribute (tree *node, tree name, |
9a03a746 | 5859 | tree ARG_UNUSED (args), |
5860 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 5861 | { |
5862 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5863 | DECL_UNINLINABLE (*node) = 1; | |
5864 | else | |
5865 | { | |
9b2d6d13 | 5866 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5867 | *no_add_attrs = true; |
5868 | } | |
5869 | ||
5870 | return NULL_TREE; | |
5871 | } | |
5872 | ||
bdb1f0d1 | 5873 | /* Handle a "noclone" attribute; arguments as in |
5874 | struct attribute_spec.handler. */ | |
5875 | ||
5876 | static tree | |
5877 | handle_noclone_attribute (tree *node, tree name, | |
5878 | tree ARG_UNUSED (args), | |
5879 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5880 | { | |
5881 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
5882 | { | |
5883 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5884 | *no_add_attrs = true; | |
5885 | } | |
5886 | ||
5887 | return NULL_TREE; | |
5888 | } | |
5889 | ||
f8e93a2e | 5890 | /* Handle a "always_inline" attribute; arguments as in |
5891 | struct attribute_spec.handler. */ | |
5892 | ||
5893 | static tree | |
1cae46be | 5894 | handle_always_inline_attribute (tree *node, tree name, |
9a03a746 | 5895 | tree ARG_UNUSED (args), |
5896 | int ARG_UNUSED (flags), | |
09347743 | 5897 | bool *no_add_attrs) |
f8e93a2e | 5898 | { |
5899 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5900 | { | |
ebb7d626 | 5901 | /* Set the attribute and mark it for disregarding inline |
5902 | limits. */ | |
5903 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
f8e93a2e | 5904 | } |
5905 | else | |
5906 | { | |
9b2d6d13 | 5907 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 5908 | *no_add_attrs = true; |
541e4101 | 5909 | } |
5910 | ||
5911 | return NULL_TREE; | |
5912 | } | |
5913 | ||
5914 | /* Handle a "gnu_inline" attribute; arguments as in | |
5915 | struct attribute_spec.handler. */ | |
5916 | ||
5917 | static tree | |
5918 | handle_gnu_inline_attribute (tree *node, tree name, | |
5919 | tree ARG_UNUSED (args), | |
5920 | int ARG_UNUSED (flags), | |
5921 | bool *no_add_attrs) | |
5922 | { | |
5923 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5924 | { | |
5925 | /* Do nothing else, just set the attribute. We'll get at | |
5926 | it later with lookup_attribute. */ | |
5927 | } | |
5928 | else | |
5929 | { | |
5930 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5931 | *no_add_attrs = true; | |
7bd95dfd | 5932 | } |
5933 | ||
5934 | return NULL_TREE; | |
5935 | } | |
5936 | ||
5937 | /* Handle a "leaf" attribute; arguments as in | |
5938 | struct attribute_spec.handler. */ | |
5939 | ||
5940 | static tree | |
5941 | handle_leaf_attribute (tree *node, tree name, | |
5942 | tree ARG_UNUSED (args), | |
5943 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5944 | { | |
5945 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
5946 | { | |
5947 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5948 | *no_add_attrs = true; | |
5949 | } | |
5950 | if (!TREE_PUBLIC (*node)) | |
5951 | { | |
5952 | warning (OPT_Wattributes, "%qE attribute has no effect on unit local functions", name); | |
5953 | *no_add_attrs = true; | |
f8e93a2e | 5954 | } |
5955 | ||
5956 | return NULL_TREE; | |
5957 | } | |
5958 | ||
1b16fc45 | 5959 | /* Handle an "artificial" attribute; arguments as in |
5960 | struct attribute_spec.handler. */ | |
5961 | ||
5962 | static tree | |
5963 | handle_artificial_attribute (tree *node, tree name, | |
5964 | tree ARG_UNUSED (args), | |
5965 | int ARG_UNUSED (flags), | |
5966 | bool *no_add_attrs) | |
5967 | { | |
5968 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5969 | { | |
5970 | /* Do nothing else, just set the attribute. We'll get at | |
5971 | it later with lookup_attribute. */ | |
5972 | } | |
5973 | else | |
5974 | { | |
5975 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5976 | *no_add_attrs = true; | |
5977 | } | |
5978 | ||
5979 | return NULL_TREE; | |
5980 | } | |
5981 | ||
0cdd9887 | 5982 | /* Handle a "flatten" attribute; arguments as in |
5983 | struct attribute_spec.handler. */ | |
5984 | ||
5985 | static tree | |
5986 | handle_flatten_attribute (tree *node, tree name, | |
a0c938f0 | 5987 | tree args ATTRIBUTE_UNUSED, |
5988 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0cdd9887 | 5989 | { |
5990 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5991 | /* Do nothing else, just set the attribute. We'll get at | |
5992 | it later with lookup_attribute. */ | |
5993 | ; | |
5994 | else | |
5995 | { | |
5996 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5997 | *no_add_attrs = true; | |
5998 | } | |
5999 | ||
6000 | return NULL_TREE; | |
6001 | } | |
6002 | ||
10fc867f | 6003 | /* Handle a "warning" or "error" attribute; arguments as in |
6004 | struct attribute_spec.handler. */ | |
6005 | ||
6006 | static tree | |
6007 | handle_error_attribute (tree *node, tree name, tree args, | |
6008 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6009 | { | |
6010 | if (TREE_CODE (*node) == FUNCTION_DECL | |
6011 | || TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
6012 | /* Do nothing else, just set the attribute. We'll get at | |
6013 | it later with lookup_attribute. */ | |
6014 | ; | |
6015 | else | |
6016 | { | |
6017 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6018 | *no_add_attrs = true; | |
6019 | } | |
6020 | ||
6021 | return NULL_TREE; | |
6022 | } | |
0cdd9887 | 6023 | |
f8e93a2e | 6024 | /* Handle a "used" attribute; arguments as in |
6025 | struct attribute_spec.handler. */ | |
6026 | ||
6027 | static tree | |
9a03a746 | 6028 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
6029 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6030 | { |
d0a31bd8 | 6031 | tree node = *pnode; |
6032 | ||
6033 | if (TREE_CODE (node) == FUNCTION_DECL | |
6034 | || (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node))) | |
f54ed8bc | 6035 | { |
f54ed8bc | 6036 | TREE_USED (node) = 1; |
9423c9b7 | 6037 | DECL_PRESERVE_P (node) = 1; |
abc6c64f | 6038 | if (TREE_CODE (node) == VAR_DECL) |
6039 | DECL_READ_P (node) = 1; | |
f54ed8bc | 6040 | } |
f8e93a2e | 6041 | else |
6042 | { | |
9b2d6d13 | 6043 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6044 | *no_add_attrs = true; |
6045 | } | |
6046 | ||
6047 | return NULL_TREE; | |
6048 | } | |
6049 | ||
6050 | /* Handle a "unused" attribute; arguments as in | |
6051 | struct attribute_spec.handler. */ | |
6052 | ||
6053 | static tree | |
9a03a746 | 6054 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6055 | int flags, bool *no_add_attrs) | |
f8e93a2e | 6056 | { |
6057 | if (DECL_P (*node)) | |
6058 | { | |
6059 | tree decl = *node; | |
6060 | ||
6061 | if (TREE_CODE (decl) == PARM_DECL | |
6062 | || TREE_CODE (decl) == VAR_DECL | |
6063 | || TREE_CODE (decl) == FUNCTION_DECL | |
6064 | || TREE_CODE (decl) == LABEL_DECL | |
6065 | || TREE_CODE (decl) == TYPE_DECL) | |
abc6c64f | 6066 | { |
6067 | TREE_USED (decl) = 1; | |
6068 | if (TREE_CODE (decl) == VAR_DECL | |
6069 | || TREE_CODE (decl) == PARM_DECL) | |
6070 | DECL_READ_P (decl) = 1; | |
6071 | } | |
f8e93a2e | 6072 | else |
6073 | { | |
9b2d6d13 | 6074 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6075 | *no_add_attrs = true; |
6076 | } | |
6077 | } | |
6078 | else | |
6079 | { | |
6080 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 6081 | *node = build_variant_type_copy (*node); |
f8e93a2e | 6082 | TREE_USED (*node) = 1; |
6083 | } | |
6084 | ||
6085 | return NULL_TREE; | |
6086 | } | |
6087 | ||
62eec3b4 | 6088 | /* Handle a "externally_visible" attribute; arguments as in |
6089 | struct attribute_spec.handler. */ | |
6090 | ||
6091 | static tree | |
6092 | handle_externally_visible_attribute (tree *pnode, tree name, | |
6093 | tree ARG_UNUSED (args), | |
6094 | int ARG_UNUSED (flags), | |
6095 | bool *no_add_attrs) | |
6096 | { | |
6097 | tree node = *pnode; | |
6098 | ||
ba12ea31 | 6099 | if (TREE_CODE (node) == FUNCTION_DECL || TREE_CODE (node) == VAR_DECL) |
62eec3b4 | 6100 | { |
ba12ea31 | 6101 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
6102 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
6103 | { | |
6104 | warning (OPT_Wattributes, | |
6105 | "%qE attribute have effect only on public objects", name); | |
6106 | *no_add_attrs = true; | |
6107 | } | |
62eec3b4 | 6108 | } |
62eec3b4 | 6109 | else |
6110 | { | |
6111 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6112 | *no_add_attrs = true; | |
6113 | } | |
6114 | ||
6115 | return NULL_TREE; | |
6116 | } | |
6117 | ||
f8e93a2e | 6118 | /* Handle a "const" attribute; arguments as in |
6119 | struct attribute_spec.handler. */ | |
6120 | ||
6121 | static tree | |
9a03a746 | 6122 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6123 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6124 | { |
6125 | tree type = TREE_TYPE (*node); | |
6126 | ||
6127 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
6128 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6129 | TREE_READONLY (*node) = 1; | |
6130 | else if (TREE_CODE (type) == POINTER_TYPE | |
6131 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
6132 | TREE_TYPE (*node) | |
6133 | = build_pointer_type | |
6134 | (build_type_variant (TREE_TYPE (type), 1, | |
6135 | TREE_THIS_VOLATILE (TREE_TYPE (type)))); | |
6136 | else | |
6137 | { | |
9b2d6d13 | 6138 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6139 | *no_add_attrs = true; |
6140 | } | |
6141 | ||
6142 | return NULL_TREE; | |
6143 | } | |
6144 | ||
6145 | /* Handle a "transparent_union" attribute; arguments as in | |
6146 | struct attribute_spec.handler. */ | |
6147 | ||
6148 | static tree | |
1cae46be | 6149 | handle_transparent_union_attribute (tree *node, tree name, |
9a03a746 | 6150 | tree ARG_UNUSED (args), int flags, |
09347743 | 6151 | bool *no_add_attrs) |
f8e93a2e | 6152 | { |
881eb642 | 6153 | tree type; |
03908818 | 6154 | |
6155 | *no_add_attrs = true; | |
f8e93a2e | 6156 | |
881eb642 | 6157 | if (TREE_CODE (*node) == TYPE_DECL) |
6158 | node = &TREE_TYPE (*node); | |
6159 | type = *node; | |
f8e93a2e | 6160 | |
03908818 | 6161 | if (TREE_CODE (type) == UNION_TYPE) |
f8e93a2e | 6162 | { |
03908818 | 6163 | /* When IN_PLACE is set, leave the check for FIELDS and MODE to |
6164 | the code in finish_struct. */ | |
f8e93a2e | 6165 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
03908818 | 6166 | { |
6167 | if (TYPE_FIELDS (type) == NULL_TREE | |
914d1151 | 6168 | || c_dialect_cxx () |
03908818 | 6169 | || TYPE_MODE (type) != DECL_MODE (TYPE_FIELDS (type))) |
6170 | goto ignored; | |
6171 | ||
6172 | /* A type variant isn't good enough, since we don't a cast | |
6173 | to such a type removed as a no-op. */ | |
6174 | *node = type = build_duplicate_type (type); | |
6175 | } | |
6176 | ||
8df5a43d | 6177 | TYPE_TRANSPARENT_AGGR (type) = 1; |
03908818 | 6178 | return NULL_TREE; |
f8e93a2e | 6179 | } |
6180 | ||
03908818 | 6181 | ignored: |
6182 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 6183 | return NULL_TREE; |
6184 | } | |
6185 | ||
9af7fd5b | 6186 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
6187 | get the requested priority for a constructor or destructor, | |
6188 | possibly issuing diagnostics for invalid or reserved | |
6189 | priorities. */ | |
6190 | ||
6191 | static priority_type | |
6192 | get_priority (tree args, bool is_destructor) | |
6193 | { | |
6194 | HOST_WIDE_INT pri; | |
6c181a06 | 6195 | tree arg; |
9af7fd5b | 6196 | |
6197 | if (!args) | |
6198 | return DEFAULT_INIT_PRIORITY; | |
48e1416a | 6199 | |
28fbc04f | 6200 | if (!SUPPORTS_INIT_PRIORITY) |
6201 | { | |
6202 | if (is_destructor) | |
6203 | error ("destructor priorities are not supported"); | |
6204 | else | |
6205 | error ("constructor priorities are not supported"); | |
6206 | return DEFAULT_INIT_PRIORITY; | |
6207 | } | |
6208 | ||
6c181a06 | 6209 | arg = TREE_VALUE (args); |
6210 | if (!host_integerp (arg, /*pos=*/0) | |
6211 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) | |
9af7fd5b | 6212 | goto invalid; |
6213 | ||
6214 | pri = tree_low_cst (TREE_VALUE (args), /*pos=*/0); | |
6215 | if (pri < 0 || pri > MAX_INIT_PRIORITY) | |
6216 | goto invalid; | |
6217 | ||
6218 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
6219 | { | |
6220 | if (is_destructor) | |
6221 | warning (0, | |
6222 | "destructor priorities from 0 to %d are reserved " | |
48e1416a | 6223 | "for the implementation", |
9af7fd5b | 6224 | MAX_RESERVED_INIT_PRIORITY); |
6225 | else | |
6226 | warning (0, | |
6227 | "constructor priorities from 0 to %d are reserved " | |
48e1416a | 6228 | "for the implementation", |
9af7fd5b | 6229 | MAX_RESERVED_INIT_PRIORITY); |
6230 | } | |
6231 | return pri; | |
6232 | ||
6233 | invalid: | |
6234 | if (is_destructor) | |
6235 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
6236 | MAX_INIT_PRIORITY); | |
6237 | else | |
6238 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
6239 | MAX_INIT_PRIORITY); | |
6240 | return DEFAULT_INIT_PRIORITY; | |
6241 | } | |
6242 | ||
f8e93a2e | 6243 | /* Handle a "constructor" attribute; arguments as in |
6244 | struct attribute_spec.handler. */ | |
6245 | ||
6246 | static tree | |
9af7fd5b | 6247 | handle_constructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 6248 | int ARG_UNUSED (flags), |
09347743 | 6249 | bool *no_add_attrs) |
f8e93a2e | 6250 | { |
6251 | tree decl = *node; | |
6252 | tree type = TREE_TYPE (decl); | |
6253 | ||
6254 | if (TREE_CODE (decl) == FUNCTION_DECL | |
6255 | && TREE_CODE (type) == FUNCTION_TYPE | |
6256 | && decl_function_context (decl) == 0) | |
6257 | { | |
9af7fd5b | 6258 | priority_type priority; |
f8e93a2e | 6259 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
9af7fd5b | 6260 | priority = get_priority (args, /*is_destructor=*/false); |
6261 | SET_DECL_INIT_PRIORITY (decl, priority); | |
f8e93a2e | 6262 | TREE_USED (decl) = 1; |
6263 | } | |
6264 | else | |
6265 | { | |
9b2d6d13 | 6266 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6267 | *no_add_attrs = true; |
6268 | } | |
6269 | ||
6270 | return NULL_TREE; | |
6271 | } | |
6272 | ||
6273 | /* Handle a "destructor" attribute; arguments as in | |
6274 | struct attribute_spec.handler. */ | |
6275 | ||
6276 | static tree | |
9af7fd5b | 6277 | handle_destructor_attribute (tree *node, tree name, tree args, |
9a03a746 | 6278 | int ARG_UNUSED (flags), |
09347743 | 6279 | bool *no_add_attrs) |
f8e93a2e | 6280 | { |
6281 | tree decl = *node; | |
6282 | tree type = TREE_TYPE (decl); | |
6283 | ||
6284 | if (TREE_CODE (decl) == FUNCTION_DECL | |
6285 | && TREE_CODE (type) == FUNCTION_TYPE | |
6286 | && decl_function_context (decl) == 0) | |
6287 | { | |
9af7fd5b | 6288 | priority_type priority; |
f8e93a2e | 6289 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
9af7fd5b | 6290 | priority = get_priority (args, /*is_destructor=*/true); |
6291 | SET_DECL_FINI_PRIORITY (decl, priority); | |
f8e93a2e | 6292 | TREE_USED (decl) = 1; |
6293 | } | |
6294 | else | |
6295 | { | |
9b2d6d13 | 6296 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6297 | *no_add_attrs = true; |
6298 | } | |
6299 | ||
6300 | return NULL_TREE; | |
6301 | } | |
6302 | ||
1c58e3f1 | 6303 | /* Nonzero if the mode is a valid vector mode for this architecture. |
6304 | This returns nonzero even if there is no hardware support for the | |
6305 | vector mode, but we can emulate with narrower modes. */ | |
6306 | ||
6307 | static int | |
6308 | vector_mode_valid_p (enum machine_mode mode) | |
6309 | { | |
6310 | enum mode_class mclass = GET_MODE_CLASS (mode); | |
6311 | enum machine_mode innermode; | |
6312 | ||
6313 | /* Doh! What's going on? */ | |
6314 | if (mclass != MODE_VECTOR_INT | |
6315 | && mclass != MODE_VECTOR_FLOAT | |
6316 | && mclass != MODE_VECTOR_FRACT | |
6317 | && mclass != MODE_VECTOR_UFRACT | |
6318 | && mclass != MODE_VECTOR_ACCUM | |
6319 | && mclass != MODE_VECTOR_UACCUM) | |
6320 | return 0; | |
6321 | ||
6322 | /* Hardware support. Woo hoo! */ | |
6323 | if (targetm.vector_mode_supported_p (mode)) | |
6324 | return 1; | |
6325 | ||
6326 | innermode = GET_MODE_INNER (mode); | |
6327 | ||
6328 | /* We should probably return 1 if requesting V4DI and we have no DI, | |
6329 | but we have V2DI, but this is probably very unlikely. */ | |
6330 | ||
6331 | /* If we have support for the inner mode, we can safely emulate it. | |
6332 | We may not have V2DI, but me can emulate with a pair of DIs. */ | |
6333 | return targetm.scalar_mode_supported_p (innermode); | |
6334 | } | |
6335 | ||
6336 | ||
f8e93a2e | 6337 | /* Handle a "mode" attribute; arguments as in |
6338 | struct attribute_spec.handler. */ | |
6339 | ||
6340 | static tree | |
9a03a746 | 6341 | handle_mode_attribute (tree *node, tree name, tree args, |
6342 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6343 | { |
6344 | tree type = *node; | |
d1dd9ac0 | 6345 | tree ident = TREE_VALUE (args); |
f8e93a2e | 6346 | |
6347 | *no_add_attrs = true; | |
6348 | ||
d1dd9ac0 | 6349 | if (TREE_CODE (ident) != IDENTIFIER_NODE) |
9b2d6d13 | 6350 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6351 | else |
6352 | { | |
6353 | int j; | |
d1dd9ac0 | 6354 | const char *p = IDENTIFIER_POINTER (ident); |
f8e93a2e | 6355 | int len = strlen (p); |
6356 | enum machine_mode mode = VOIDmode; | |
6357 | tree typefm; | |
b2aef146 | 6358 | bool valid_mode; |
f8e93a2e | 6359 | |
6360 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
6361 | && p[len - 1] == '_' && p[len - 2] == '_') | |
6362 | { | |
4fd61bc6 | 6363 | char *newp = (char *) alloca (len - 1); |
f8e93a2e | 6364 | |
6365 | strcpy (newp, &p[2]); | |
6366 | newp[len - 4] = '\0'; | |
6367 | p = newp; | |
6368 | } | |
6369 | ||
6370 | /* Change this type to have a type with the specified mode. | |
6371 | First check for the special modes. */ | |
84166705 | 6372 | if (!strcmp (p, "byte")) |
f8e93a2e | 6373 | mode = byte_mode; |
6374 | else if (!strcmp (p, "word")) | |
6375 | mode = word_mode; | |
84166705 | 6376 | else if (!strcmp (p, "pointer")) |
f8e93a2e | 6377 | mode = ptr_mode; |
0ef89dfd | 6378 | else if (!strcmp (p, "libgcc_cmp_return")) |
6379 | mode = targetm.libgcc_cmp_return_mode (); | |
6380 | else if (!strcmp (p, "libgcc_shift_count")) | |
6381 | mode = targetm.libgcc_shift_count_mode (); | |
1bd43494 | 6382 | else if (!strcmp (p, "unwind_word")) |
6383 | mode = targetm.unwind_word_mode (); | |
f8e93a2e | 6384 | else |
6385 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
6386 | if (!strcmp (p, GET_MODE_NAME (j))) | |
743a6f47 | 6387 | { |
6388 | mode = (enum machine_mode) j; | |
6389 | break; | |
6390 | } | |
f8e93a2e | 6391 | |
6392 | if (mode == VOIDmode) | |
4917c376 | 6393 | { |
d1dd9ac0 | 6394 | error ("unknown machine mode %qE", ident); |
4917c376 | 6395 | return NULL_TREE; |
6396 | } | |
6397 | ||
b2aef146 | 6398 | valid_mode = false; |
6399 | switch (GET_MODE_CLASS (mode)) | |
4917c376 | 6400 | { |
b2aef146 | 6401 | case MODE_INT: |
6402 | case MODE_PARTIAL_INT: | |
6403 | case MODE_FLOAT: | |
c4503c0a | 6404 | case MODE_DECIMAL_FLOAT: |
9421ebb9 | 6405 | case MODE_FRACT: |
6406 | case MODE_UFRACT: | |
6407 | case MODE_ACCUM: | |
6408 | case MODE_UACCUM: | |
b2aef146 | 6409 | valid_mode = targetm.scalar_mode_supported_p (mode); |
6410 | break; | |
6411 | ||
6412 | case MODE_COMPLEX_INT: | |
6413 | case MODE_COMPLEX_FLOAT: | |
6414 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
6415 | break; | |
6416 | ||
6417 | case MODE_VECTOR_INT: | |
6418 | case MODE_VECTOR_FLOAT: | |
9421ebb9 | 6419 | case MODE_VECTOR_FRACT: |
6420 | case MODE_VECTOR_UFRACT: | |
6421 | case MODE_VECTOR_ACCUM: | |
6422 | case MODE_VECTOR_UACCUM: | |
9b2d6d13 | 6423 | warning (OPT_Wattributes, "specifying vector types with " |
6424 | "__attribute__ ((mode)) is deprecated"); | |
6425 | warning (OPT_Wattributes, | |
6426 | "use __attribute__ ((vector_size)) instead"); | |
b2aef146 | 6427 | valid_mode = vector_mode_valid_p (mode); |
6428 | break; | |
4917c376 | 6429 | |
b2aef146 | 6430 | default: |
6431 | break; | |
6432 | } | |
6433 | if (!valid_mode) | |
6434 | { | |
1e5fcbe2 | 6435 | error ("unable to emulate %qs", p); |
b2aef146 | 6436 | return NULL_TREE; |
6437 | } | |
4917c376 | 6438 | |
b2aef146 | 6439 | if (POINTER_TYPE_P (type)) |
ead34f59 | 6440 | { |
6d5d708e | 6441 | addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type)); |
b2aef146 | 6442 | tree (*fn)(tree, enum machine_mode, bool); |
6443 | ||
6d5d708e | 6444 | if (!targetm.addr_space.valid_pointer_mode (mode, as)) |
ead34f59 | 6445 | { |
1e5fcbe2 | 6446 | error ("invalid pointer mode %qs", p); |
ead34f59 | 6447 | return NULL_TREE; |
6448 | } | |
6449 | ||
a0c938f0 | 6450 | if (TREE_CODE (type) == POINTER_TYPE) |
b2aef146 | 6451 | fn = build_pointer_type_for_mode; |
805e22b2 | 6452 | else |
b2aef146 | 6453 | fn = build_reference_type_for_mode; |
6454 | typefm = fn (TREE_TYPE (type), mode, false); | |
ead34f59 | 6455 | } |
b2aef146 | 6456 | else |
9421ebb9 | 6457 | { |
6458 | /* For fixed-point modes, we need to test if the signness of type | |
6459 | and the machine mode are consistent. */ | |
6460 | if (ALL_FIXED_POINT_MODE_P (mode) | |
6461 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
6462 | { | |
bf776685 | 6463 | error ("signedness of type and machine mode %qs don%'t match", p); |
9421ebb9 | 6464 | return NULL_TREE; |
6465 | } | |
6466 | /* For fixed-point modes, we need to pass saturating info. */ | |
6467 | typefm = lang_hooks.types.type_for_mode (mode, | |
6468 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
6469 | : TYPE_UNSIGNED (type)); | |
6470 | } | |
3a648ab9 | 6471 | |
b2aef146 | 6472 | if (typefm == NULL_TREE) |
6473 | { | |
743a6f47 | 6474 | error ("no data type for mode %qs", p); |
b2aef146 | 6475 | return NULL_TREE; |
6476 | } | |
3a648ab9 | 6477 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
6478 | { | |
6479 | /* For enumeral types, copy the precision from the integer | |
6480 | type returned above. If not an INTEGER_TYPE, we can't use | |
6481 | this mode for this type. */ | |
6482 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
6483 | { | |
743a6f47 | 6484 | error ("cannot use mode %qs for enumeral types", p); |
3a648ab9 | 6485 | return NULL_TREE; |
6486 | } | |
6487 | ||
10080eac | 6488 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
6489 | { | |
6490 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
6491 | typefm = type; | |
6492 | } | |
6493 | else | |
6494 | { | |
6495 | /* We cannot build a type variant, as there's code that assumes | |
6496 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
6497 | debug generators. Instead, create a subrange type. This | |
6498 | results in all of the enumeral values being emitted only once | |
6499 | in the original, and the subtype gets them by reference. */ | |
6500 | if (TYPE_UNSIGNED (type)) | |
6501 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
6502 | else | |
6503 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
6504 | TREE_TYPE (typefm) = type; | |
6505 | } | |
3a648ab9 | 6506 | } |
4bf450a1 | 6507 | else if (VECTOR_MODE_P (mode) |
6508 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
6509 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
743a6f47 | 6510 | { |
6511 | error ("mode %qs applied to inappropriate type", p); | |
6512 | return NULL_TREE; | |
6513 | } | |
6514 | ||
b2aef146 | 6515 | *node = typefm; |
f8e93a2e | 6516 | } |
6517 | ||
6518 | return NULL_TREE; | |
6519 | } | |
6520 | ||
6521 | /* Handle a "section" attribute; arguments as in | |
6522 | struct attribute_spec.handler. */ | |
6523 | ||
6524 | static tree | |
9a03a746 | 6525 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
6526 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 6527 | { |
6528 | tree decl = *node; | |
6529 | ||
6530 | if (targetm.have_named_sections) | |
6531 | { | |
065efcb1 | 6532 | user_defined_section_attribute = true; |
6533 | ||
f8e93a2e | 6534 | if ((TREE_CODE (decl) == FUNCTION_DECL |
6535 | || TREE_CODE (decl) == VAR_DECL) | |
6536 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
6537 | { | |
6538 | if (TREE_CODE (decl) == VAR_DECL | |
6539 | && current_function_decl != NULL_TREE | |
84166705 | 6540 | && !TREE_STATIC (decl)) |
f8e93a2e | 6541 | { |
48e1416a | 6542 | error_at (DECL_SOURCE_LOCATION (decl), |
712d2297 | 6543 | "section attribute cannot be specified for " |
6544 | "local variables"); | |
f8e93a2e | 6545 | *no_add_attrs = true; |
6546 | } | |
6547 | ||
6548 | /* The decl may have already been given a section attribute | |
6549 | from a previous declaration. Ensure they match. */ | |
6550 | else if (DECL_SECTION_NAME (decl) != NULL_TREE | |
6551 | && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)), | |
6552 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) | |
6553 | { | |
3cf8b391 | 6554 | error ("section of %q+D conflicts with previous declaration", |
6555 | *node); | |
f8e93a2e | 6556 | *no_add_attrs = true; |
6557 | } | |
38475469 | 6558 | else if (TREE_CODE (decl) == VAR_DECL |
6559 | && !targetm.have_tls && targetm.emutls.tmpl_section | |
6560 | && DECL_THREAD_LOCAL_P (decl)) | |
6561 | { | |
6562 | error ("section of %q+D cannot be overridden", *node); | |
6563 | *no_add_attrs = true; | |
6564 | } | |
f8e93a2e | 6565 | else |
6566 | DECL_SECTION_NAME (decl) = TREE_VALUE (args); | |
6567 | } | |
6568 | else | |
6569 | { | |
3cf8b391 | 6570 | error ("section attribute not allowed for %q+D", *node); |
f8e93a2e | 6571 | *no_add_attrs = true; |
6572 | } | |
6573 | } | |
6574 | else | |
6575 | { | |
712d2297 | 6576 | error_at (DECL_SOURCE_LOCATION (*node), |
6577 | "section attributes are not supported for this target"); | |
f8e93a2e | 6578 | *no_add_attrs = true; |
6579 | } | |
6580 | ||
6581 | return NULL_TREE; | |
6582 | } | |
6583 | ||
6584 | /* Handle a "aligned" attribute; arguments as in | |
6585 | struct attribute_spec.handler. */ | |
6586 | ||
6587 | static tree | |
9a03a746 | 6588 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
09347743 | 6589 | int flags, bool *no_add_attrs) |
f8e93a2e | 6590 | { |
6591 | tree decl = NULL_TREE; | |
6592 | tree *type = NULL; | |
6593 | int is_type = 0; | |
6594 | tree align_expr = (args ? TREE_VALUE (args) | |
02421213 | 6595 | : size_int (ATTRIBUTE_ALIGNED_VALUE / BITS_PER_UNIT)); |
f8e93a2e | 6596 | int i; |
6597 | ||
6598 | if (DECL_P (*node)) | |
6599 | { | |
6600 | decl = *node; | |
6601 | type = &TREE_TYPE (decl); | |
6602 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
6603 | } | |
6604 | else if (TYPE_P (*node)) | |
6605 | type = node, is_type = 1; | |
6606 | ||
f8e93a2e | 6607 | if (TREE_CODE (align_expr) != INTEGER_CST) |
6608 | { | |
6609 | error ("requested alignment is not a constant"); | |
6610 | *no_add_attrs = true; | |
6611 | } | |
6612 | else if ((i = tree_log2 (align_expr)) == -1) | |
6613 | { | |
6614 | error ("requested alignment is not a power of 2"); | |
6615 | *no_add_attrs = true; | |
6616 | } | |
7cfdc2f0 | 6617 | else if (i >= HOST_BITS_PER_INT - BITS_PER_UNIT_LOG) |
f8e93a2e | 6618 | { |
6619 | error ("requested alignment is too large"); | |
6620 | *no_add_attrs = true; | |
6621 | } | |
6622 | else if (is_type) | |
6623 | { | |
2ec3af9c | 6624 | if ((flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
6625 | /* OK, modify the type in place. */; | |
f8e93a2e | 6626 | /* If we have a TYPE_DECL, then copy the type, so that we |
6627 | don't accidentally modify a builtin type. See pushdecl. */ | |
2ec3af9c | 6628 | else if (decl && TREE_TYPE (decl) != error_mark_node |
6629 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
f8e93a2e | 6630 | { |
6631 | tree tt = TREE_TYPE (decl); | |
e086912e | 6632 | *type = build_variant_type_copy (*type); |
f8e93a2e | 6633 | DECL_ORIGINAL_TYPE (decl) = tt; |
6634 | TYPE_NAME (*type) = decl; | |
6635 | TREE_USED (*type) = TREE_USED (decl); | |
6636 | TREE_TYPE (decl) = *type; | |
6637 | } | |
2ec3af9c | 6638 | else |
e086912e | 6639 | *type = build_variant_type_copy (*type); |
f8e93a2e | 6640 | |
7cfdc2f0 | 6641 | TYPE_ALIGN (*type) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 6642 | TYPE_USER_ALIGN (*type) = 1; |
6643 | } | |
097b5c8b | 6644 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
f8e93a2e | 6645 | && TREE_CODE (decl) != FIELD_DECL) |
6646 | { | |
3cf8b391 | 6647 | error ("alignment may not be specified for %q+D", decl); |
f8e93a2e | 6648 | *no_add_attrs = true; |
6649 | } | |
097b5c8b | 6650 | else if (TREE_CODE (decl) == FUNCTION_DECL |
7cfdc2f0 | 6651 | && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
097b5c8b | 6652 | { |
6653 | if (DECL_USER_ALIGN (decl)) | |
6654 | error ("alignment for %q+D was previously specified as %d " | |
6655 | "and may not be decreased", decl, | |
6656 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
6657 | else | |
6658 | error ("alignment for %q+D must be at least %d", decl, | |
6659 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
6660 | *no_add_attrs = true; | |
6661 | } | |
f8e93a2e | 6662 | else |
6663 | { | |
7cfdc2f0 | 6664 | DECL_ALIGN (decl) = (1U << i) * BITS_PER_UNIT; |
f8e93a2e | 6665 | DECL_USER_ALIGN (decl) = 1; |
6666 | } | |
6667 | ||
6668 | return NULL_TREE; | |
6669 | } | |
6670 | ||
6671 | /* Handle a "weak" attribute; arguments as in | |
6672 | struct attribute_spec.handler. */ | |
6673 | ||
6674 | static tree | |
f948b309 | 6675 | handle_weak_attribute (tree *node, tree name, |
9a03a746 | 6676 | tree ARG_UNUSED (args), |
6677 | int ARG_UNUSED (flags), | |
6678 | bool * ARG_UNUSED (no_add_attrs)) | |
f8e93a2e | 6679 | { |
f948b309 | 6680 | if (TREE_CODE (*node) == FUNCTION_DECL |
059a60f3 | 6681 | && DECL_DECLARED_INLINE_P (*node)) |
6682 | { | |
0725e25c | 6683 | warning (OPT_Wattributes, "inline function %q+D declared weak", *node); |
059a60f3 | 6684 | *no_add_attrs = true; |
6685 | } | |
85c0a25c | 6686 | else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
6687 | { | |
6688 | error ("indirect function %q+D cannot be declared weak", *node); | |
6689 | *no_add_attrs = true; | |
6690 | return NULL_TREE; | |
6691 | } | |
059a60f3 | 6692 | else if (TREE_CODE (*node) == FUNCTION_DECL |
6693 | || TREE_CODE (*node) == VAR_DECL) | |
f948b309 | 6694 | declare_weak (*node); |
6695 | else | |
6696 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
f8e93a2e | 6697 | |
6698 | return NULL_TREE; | |
6699 | } | |
6700 | ||
85c0a25c | 6701 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
6702 | struct attribute_spec.handler, except that IS_ALIAS tells us | |
6703 | whether this is an alias as opposed to ifunc attribute. */ | |
f8e93a2e | 6704 | |
6705 | static tree | |
85c0a25c | 6706 | handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args, |
6707 | bool *no_add_attrs) | |
f8e93a2e | 6708 | { |
6709 | tree decl = *node; | |
6710 | ||
85c0a25c | 6711 | if (TREE_CODE (decl) != FUNCTION_DECL |
6712 | && (!is_alias || TREE_CODE (decl) != VAR_DECL)) | |
9e830260 | 6713 | { |
6714 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6715 | *no_add_attrs = true; | |
6716 | } | |
6717 | else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
48e1416a | 6718 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 6719 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) |
6720 | /* A static variable declaration is always a tentative definition, | |
6721 | but the alias is a non-tentative definition which overrides. */ | |
48e1416a | 6722 | || (TREE_CODE (decl) != FUNCTION_DECL |
0a3ecdc1 | 6723 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) |
f8e93a2e | 6724 | { |
85c0a25c | 6725 | error ("%q+D defined both normally and as %qE attribute", decl, name); |
f8e93a2e | 6726 | *no_add_attrs = true; |
85c0a25c | 6727 | return NULL_TREE; |
f8e93a2e | 6728 | } |
85c0a25c | 6729 | else if (!is_alias |
6730 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) | |
6731 | || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))) | |
6732 | { | |
6733 | error ("weak %q+D cannot be defined %qE", decl, name); | |
6734 | *no_add_attrs = true; | |
6735 | return NULL_TREE; | |
6736 | } | |
8c42f0d9 | 6737 | |
6738 | /* Note that the very first time we process a nested declaration, | |
6739 | decl_function_context will not be set. Indeed, *would* never | |
6740 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
6741 | we do below. After such frobbery, pushdecl would set the context. | |
6742 | In any case, this is never what we want. */ | |
6743 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
f8e93a2e | 6744 | { |
6745 | tree id; | |
6746 | ||
6747 | id = TREE_VALUE (args); | |
6748 | if (TREE_CODE (id) != STRING_CST) | |
6749 | { | |
85c0a25c | 6750 | error ("attribute %qE argument not a string", name); |
f8e93a2e | 6751 | *no_add_attrs = true; |
6752 | return NULL_TREE; | |
6753 | } | |
6754 | id = get_identifier (TREE_STRING_POINTER (id)); | |
6755 | /* This counts as a use of the object pointed to. */ | |
6756 | TREE_USED (id) = 1; | |
6757 | ||
6758 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
6759 | DECL_INITIAL (decl) = error_mark_node; | |
6760 | else | |
4ee9c684 | 6761 | { |
f4a30bd7 | 6762 | if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl))) |
6763 | DECL_EXTERNAL (decl) = 1; | |
6764 | else | |
6765 | DECL_EXTERNAL (decl) = 0; | |
4ee9c684 | 6766 | TREE_STATIC (decl) = 1; |
6767 | } | |
85c0a25c | 6768 | |
6769 | if (!is_alias) | |
6770 | /* ifuncs are also aliases, so set that attribute too. */ | |
6771 | DECL_ATTRIBUTES (decl) | |
6772 | = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl)); | |
f8e93a2e | 6773 | } |
6774 | else | |
6775 | { | |
9b2d6d13 | 6776 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 6777 | *no_add_attrs = true; |
6778 | } | |
6779 | ||
6780 | return NULL_TREE; | |
6781 | } | |
6782 | ||
85c0a25c | 6783 | /* Handle an "alias" or "ifunc" attribute; arguments as in |
6784 | struct attribute_spec.handler. */ | |
6785 | ||
6786 | static tree | |
6787 | handle_ifunc_attribute (tree *node, tree name, tree args, | |
6788 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6789 | { | |
6790 | return handle_alias_ifunc_attribute (false, node, name, args, no_add_attrs); | |
6791 | } | |
6792 | ||
6793 | /* Handle an "alias" or "ifunc" attribute; arguments as in | |
6794 | struct attribute_spec.handler. */ | |
6795 | ||
6796 | static tree | |
6797 | handle_alias_attribute (tree *node, tree name, tree args, | |
6798 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6799 | { | |
6800 | return handle_alias_ifunc_attribute (true, node, name, args, no_add_attrs); | |
6801 | } | |
6802 | ||
f4a30bd7 | 6803 | /* Handle a "weakref" attribute; arguments as in struct |
6804 | attribute_spec.handler. */ | |
6805 | ||
6806 | static tree | |
6807 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
6808 | int flags, bool *no_add_attrs) | |
6809 | { | |
6810 | tree attr = NULL_TREE; | |
6811 | ||
83852912 | 6812 | /* We must ignore the attribute when it is associated with |
6813 | local-scoped decls, since attribute alias is ignored and many | |
6814 | such symbols do not even have a DECL_WEAK field. */ | |
64a7bd81 | 6815 | if (decl_function_context (*node) |
6816 | || current_function_decl | |
6817 | || (TREE_CODE (*node) != VAR_DECL && TREE_CODE (*node) != FUNCTION_DECL)) | |
83852912 | 6818 | { |
6819 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6820 | *no_add_attrs = true; | |
6821 | return NULL_TREE; | |
6822 | } | |
6823 | ||
85c0a25c | 6824 | if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
6825 | { | |
6826 | error ("indirect function %q+D cannot be declared weakref", *node); | |
6827 | *no_add_attrs = true; | |
6828 | return NULL_TREE; | |
6829 | } | |
6830 | ||
f4a30bd7 | 6831 | /* The idea here is that `weakref("name")' mutates into `weakref, |
6832 | alias("name")', and weakref without arguments, in turn, | |
6833 | implicitly adds weak. */ | |
6834 | ||
6835 | if (args) | |
6836 | { | |
6837 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
6838 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
6839 | ||
6840 | *no_add_attrs = true; | |
0a3ecdc1 | 6841 | |
6842 | decl_attributes (node, attr, flags); | |
f4a30bd7 | 6843 | } |
6844 | else | |
6845 | { | |
6846 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
712d2297 | 6847 | error_at (DECL_SOURCE_LOCATION (*node), |
6848 | "weakref attribute must appear before alias attribute"); | |
f4a30bd7 | 6849 | |
0a3ecdc1 | 6850 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
6851 | and that isn't supported; and because it wants to add it to | |
6852 | the list of weak decls, which isn't helpful. */ | |
6853 | DECL_WEAK (*node) = 1; | |
f4a30bd7 | 6854 | } |
6855 | ||
f4a30bd7 | 6856 | return NULL_TREE; |
6857 | } | |
6858 | ||
f8e93a2e | 6859 | /* Handle an "visibility" attribute; arguments as in |
6860 | struct attribute_spec.handler. */ | |
6861 | ||
6862 | static tree | |
1cae46be | 6863 | handle_visibility_attribute (tree *node, tree name, tree args, |
9a03a746 | 6864 | int ARG_UNUSED (flags), |
4a2849cb | 6865 | bool *ARG_UNUSED (no_add_attrs)) |
f8e93a2e | 6866 | { |
6867 | tree decl = *node; | |
9c40570a | 6868 | tree id = TREE_VALUE (args); |
4a2849cb | 6869 | enum symbol_visibility vis; |
f8e93a2e | 6870 | |
b212f378 | 6871 | if (TYPE_P (*node)) |
6872 | { | |
4a2849cb | 6873 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
6874 | /* OK */; | |
6875 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
6876 | { | |
6877 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
6878 | name); | |
6879 | return NULL_TREE; | |
6880 | } | |
6881 | else if (TYPE_FIELDS (*node)) | |
6882 | { | |
6883 | error ("%qE attribute ignored because %qT is already defined", | |
6884 | name, *node); | |
6885 | return NULL_TREE; | |
6886 | } | |
b212f378 | 6887 | } |
84166705 | 6888 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
f8e93a2e | 6889 | { |
9b2d6d13 | 6890 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
9c40570a | 6891 | return NULL_TREE; |
f8e93a2e | 6892 | } |
f8e93a2e | 6893 | |
9c40570a | 6894 | if (TREE_CODE (id) != STRING_CST) |
6895 | { | |
07e3a3d2 | 6896 | error ("visibility argument not a string"); |
9c40570a | 6897 | return NULL_TREE; |
f8e93a2e | 6898 | } |
b27ac6b5 | 6899 | |
b212f378 | 6900 | /* If this is a type, set the visibility on the type decl. */ |
6901 | if (TYPE_P (decl)) | |
6902 | { | |
6903 | decl = TYPE_NAME (decl); | |
84166705 | 6904 | if (!decl) |
a0c938f0 | 6905 | return NULL_TREE; |
e147aab3 | 6906 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
6907 | { | |
9b2d6d13 | 6908 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e147aab3 | 6909 | name); |
6910 | return NULL_TREE; | |
6911 | } | |
b212f378 | 6912 | } |
f8e93a2e | 6913 | |
9c40570a | 6914 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
4a2849cb | 6915 | vis = VISIBILITY_DEFAULT; |
9c40570a | 6916 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
4a2849cb | 6917 | vis = VISIBILITY_INTERNAL; |
9c40570a | 6918 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
4a2849cb | 6919 | vis = VISIBILITY_HIDDEN; |
9c40570a | 6920 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
4a2849cb | 6921 | vis = VISIBILITY_PROTECTED; |
9c40570a | 6922 | else |
4a2849cb | 6923 | { |
6924 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
6925 | vis = VISIBILITY_DEFAULT; | |
6926 | } | |
6927 | ||
6928 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
098a01e7 | 6929 | && vis != DECL_VISIBILITY (decl)) |
6930 | { | |
6931 | tree attributes = (TYPE_P (*node) | |
6932 | ? TYPE_ATTRIBUTES (*node) | |
6933 | : DECL_ATTRIBUTES (decl)); | |
6934 | if (lookup_attribute ("visibility", attributes)) | |
6935 | error ("%qD redeclared with different visibility", decl); | |
6936 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6937 | && lookup_attribute ("dllimport", attributes)) | |
6938 | error ("%qD was declared %qs which implies default visibility", | |
6939 | decl, "dllimport"); | |
6940 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6941 | && lookup_attribute ("dllexport", attributes)) | |
6942 | error ("%qD was declared %qs which implies default visibility", | |
6943 | decl, "dllexport"); | |
6944 | } | |
4a2849cb | 6945 | |
6946 | DECL_VISIBILITY (decl) = vis; | |
b212f378 | 6947 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
6948 | ||
4a2849cb | 6949 | /* Go ahead and attach the attribute to the node as well. This is needed |
6950 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
6951 | visibility was not specified, or because it was explicitly overridden | |
6952 | from the containing scope. */ | |
9c40570a | 6953 | |
f8e93a2e | 6954 | return NULL_TREE; |
6955 | } | |
6956 | ||
3aa0c315 | 6957 | /* Determine the ELF symbol visibility for DECL, which is either a |
6958 | variable or a function. It is an error to use this function if a | |
6959 | definition of DECL is not available in this translation unit. | |
6960 | Returns true if the final visibility has been determined by this | |
6961 | function; false if the caller is free to make additional | |
6962 | modifications. */ | |
6963 | ||
6964 | bool | |
6965 | c_determine_visibility (tree decl) | |
6966 | { | |
1d8fc210 | 6967 | gcc_assert (TREE_CODE (decl) == VAR_DECL |
6968 | || TREE_CODE (decl) == FUNCTION_DECL); | |
3aa0c315 | 6969 | |
6970 | /* If the user explicitly specified the visibility with an | |
6971 | attribute, honor that. DECL_VISIBILITY will have been set during | |
6972 | the processing of the attribute. We check for an explicit | |
6973 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
6974 | to distinguish the use of an attribute from the use of a "#pragma | |
6975 | GCC visibility push(...)"; in the latter case we still want other | |
6976 | considerations to be able to overrule the #pragma. */ | |
098a01e7 | 6977 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) |
6978 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6979 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
6980 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
3aa0c315 | 6981 | return true; |
6982 | ||
4a2849cb | 6983 | /* Set default visibility to whatever the user supplied with |
6984 | visibility_specified depending on #pragma GCC visibility. */ | |
6985 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
6986 | { | |
2d9d8740 | 6987 | if (visibility_options.inpragma |
6988 | || DECL_VISIBILITY (decl) != default_visibility) | |
6989 | { | |
6990 | DECL_VISIBILITY (decl) = default_visibility; | |
6991 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
6992 | /* If visibility changed and DECL already has DECL_RTL, ensure | |
6993 | symbol flags are updated. */ | |
6994 | if (((TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) | |
6995 | || TREE_CODE (decl) == FUNCTION_DECL) | |
6996 | && DECL_RTL_SET_P (decl)) | |
6997 | make_decl_rtl (decl); | |
6998 | } | |
4a2849cb | 6999 | } |
3aa0c315 | 7000 | return false; |
7001 | } | |
7002 | ||
24dfead4 | 7003 | /* Handle an "tls_model" attribute; arguments as in |
7004 | struct attribute_spec.handler. */ | |
7005 | ||
7006 | static tree | |
1cae46be | 7007 | handle_tls_model_attribute (tree *node, tree name, tree args, |
9a03a746 | 7008 | int ARG_UNUSED (flags), bool *no_add_attrs) |
24dfead4 | 7009 | { |
1b53eb20 | 7010 | tree id; |
24dfead4 | 7011 | tree decl = *node; |
1b53eb20 | 7012 | enum tls_model kind; |
24dfead4 | 7013 | |
1b53eb20 | 7014 | *no_add_attrs = true; |
7015 | ||
c34f8a78 | 7016 | if (TREE_CODE (decl) != VAR_DECL || !DECL_THREAD_LOCAL_P (decl)) |
24dfead4 | 7017 | { |
9b2d6d13 | 7018 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
1b53eb20 | 7019 | return NULL_TREE; |
24dfead4 | 7020 | } |
24dfead4 | 7021 | |
1b53eb20 | 7022 | kind = DECL_TLS_MODEL (decl); |
7023 | id = TREE_VALUE (args); | |
7024 | if (TREE_CODE (id) != STRING_CST) | |
7025 | { | |
7026 | error ("tls_model argument not a string"); | |
7027 | return NULL_TREE; | |
24dfead4 | 7028 | } |
7029 | ||
1b53eb20 | 7030 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
7031 | kind = TLS_MODEL_LOCAL_EXEC; | |
7032 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
7033 | kind = TLS_MODEL_INITIAL_EXEC; | |
7034 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
7035 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
7036 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
7037 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
7038 | else | |
7039 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
7040 | ||
7041 | DECL_TLS_MODEL (decl) = kind; | |
24dfead4 | 7042 | return NULL_TREE; |
7043 | } | |
7044 | ||
f8e93a2e | 7045 | /* Handle a "no_instrument_function" attribute; arguments as in |
7046 | struct attribute_spec.handler. */ | |
7047 | ||
7048 | static tree | |
1cae46be | 7049 | handle_no_instrument_function_attribute (tree *node, tree name, |
9a03a746 | 7050 | tree ARG_UNUSED (args), |
7051 | int ARG_UNUSED (flags), | |
09347743 | 7052 | bool *no_add_attrs) |
f8e93a2e | 7053 | { |
7054 | tree decl = *node; | |
7055 | ||
7056 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
7057 | { | |
712d2297 | 7058 | error_at (DECL_SOURCE_LOCATION (decl), |
7059 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 7060 | *no_add_attrs = true; |
7061 | } | |
7062 | else if (DECL_INITIAL (decl)) | |
7063 | { | |
712d2297 | 7064 | error_at (DECL_SOURCE_LOCATION (decl), |
7065 | "can%'t set %qE attribute after definition", name); | |
f8e93a2e | 7066 | *no_add_attrs = true; |
7067 | } | |
7068 | else | |
7069 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
7070 | ||
7071 | return NULL_TREE; | |
7072 | } | |
7073 | ||
7074 | /* Handle a "malloc" attribute; arguments as in | |
7075 | struct attribute_spec.handler. */ | |
7076 | ||
7077 | static tree | |
9a03a746 | 7078 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7079 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7080 | { |
a5147fca | 7081 | if (TREE_CODE (*node) == FUNCTION_DECL |
7082 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
f8e93a2e | 7083 | DECL_IS_MALLOC (*node) = 1; |
f8e93a2e | 7084 | else |
7085 | { | |
9b2d6d13 | 7086 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7087 | *no_add_attrs = true; |
7088 | } | |
7089 | ||
7090 | return NULL_TREE; | |
7091 | } | |
7092 | ||
4a29c97c | 7093 | /* Handle a "alloc_size" attribute; arguments as in |
7094 | struct attribute_spec.handler. */ | |
7095 | ||
7096 | static tree | |
7097 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
7098 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7099 | { | |
2802826e | 7100 | unsigned arg_count = type_num_arguments (*node); |
4a29c97c | 7101 | for (; args; args = TREE_CHAIN (args)) |
7102 | { | |
7103 | tree position = TREE_VALUE (args); | |
7104 | ||
7105 | if (TREE_CODE (position) != INTEGER_CST | |
48e1416a | 7106 | || TREE_INT_CST_HIGH (position) |
4a29c97c | 7107 | || TREE_INT_CST_LOW (position) < 1 |
7108 | || TREE_INT_CST_LOW (position) > arg_count ) | |
7109 | { | |
48e1416a | 7110 | warning (OPT_Wattributes, |
4a29c97c | 7111 | "alloc_size parameter outside range"); |
7112 | *no_add_attrs = true; | |
7113 | return NULL_TREE; | |
7114 | } | |
7115 | } | |
7116 | return NULL_TREE; | |
7117 | } | |
7118 | ||
8ce86007 | 7119 | /* Handle a "fn spec" attribute; arguments as in |
7120 | struct attribute_spec.handler. */ | |
7121 | ||
7122 | static tree | |
7123 | handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), | |
7124 | tree args, int ARG_UNUSED (flags), | |
7125 | bool *no_add_attrs ATTRIBUTE_UNUSED) | |
7126 | { | |
7127 | gcc_assert (args | |
7128 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST | |
7129 | && !TREE_CHAIN (args)); | |
7130 | return NULL_TREE; | |
7131 | } | |
7132 | ||
26d1c5ff | 7133 | /* Handle a "returns_twice" attribute; arguments as in |
7134 | struct attribute_spec.handler. */ | |
7135 | ||
7136 | static tree | |
7137 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
7138 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7139 | { | |
7140 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7141 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
7142 | else | |
7143 | { | |
9b2d6d13 | 7144 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
26d1c5ff | 7145 | *no_add_attrs = true; |
7146 | } | |
7147 | ||
7148 | return NULL_TREE; | |
7149 | } | |
7150 | ||
f8e93a2e | 7151 | /* Handle a "no_limit_stack" attribute; arguments as in |
7152 | struct attribute_spec.handler. */ | |
7153 | ||
7154 | static tree | |
1cae46be | 7155 | handle_no_limit_stack_attribute (tree *node, tree name, |
9a03a746 | 7156 | tree ARG_UNUSED (args), |
7157 | int ARG_UNUSED (flags), | |
09347743 | 7158 | bool *no_add_attrs) |
f8e93a2e | 7159 | { |
7160 | tree decl = *node; | |
7161 | ||
7162 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
7163 | { | |
712d2297 | 7164 | error_at (DECL_SOURCE_LOCATION (decl), |
7165 | "%qE attribute applies only to functions", name); | |
f8e93a2e | 7166 | *no_add_attrs = true; |
7167 | } | |
7168 | else if (DECL_INITIAL (decl)) | |
7169 | { | |
712d2297 | 7170 | error_at (DECL_SOURCE_LOCATION (decl), |
7171 | "can%'t set %qE attribute after definition", name); | |
f8e93a2e | 7172 | *no_add_attrs = true; |
7173 | } | |
7174 | else | |
7175 | DECL_NO_LIMIT_STACK (decl) = 1; | |
7176 | ||
7177 | return NULL_TREE; | |
7178 | } | |
7179 | ||
7180 | /* Handle a "pure" attribute; arguments as in | |
7181 | struct attribute_spec.handler. */ | |
7182 | ||
7183 | static tree | |
9a03a746 | 7184 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7185 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
f8e93a2e | 7186 | { |
7187 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
9c2a0c05 | 7188 | DECL_PURE_P (*node) = 1; |
f8e93a2e | 7189 | /* ??? TODO: Support types. */ |
7190 | else | |
7191 | { | |
9b2d6d13 | 7192 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7193 | *no_add_attrs = true; |
7194 | } | |
7195 | ||
7196 | return NULL_TREE; | |
7197 | } | |
7198 | ||
fc09b200 | 7199 | /* Handle a "no vops" attribute; arguments as in |
7200 | struct attribute_spec.handler. */ | |
7201 | ||
7202 | static tree | |
7203 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
7204 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
7205 | bool *ARG_UNUSED (no_add_attrs)) | |
7206 | { | |
7207 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
7208 | DECL_IS_NOVOPS (*node) = 1; | |
7209 | return NULL_TREE; | |
7210 | } | |
7211 | ||
f8e93a2e | 7212 | /* Handle a "deprecated" attribute; arguments as in |
7213 | struct attribute_spec.handler. */ | |
1cae46be | 7214 | |
f8e93a2e | 7215 | static tree |
1cae46be | 7216 | handle_deprecated_attribute (tree *node, tree name, |
45c4e798 | 7217 | tree args, int flags, |
09347743 | 7218 | bool *no_add_attrs) |
f8e93a2e | 7219 | { |
7220 | tree type = NULL_TREE; | |
7221 | int warn = 0; | |
782858b8 | 7222 | tree what = NULL_TREE; |
1cae46be | 7223 | |
45c4e798 | 7224 | if (!args) |
7225 | *no_add_attrs = true; | |
7226 | else if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) | |
7227 | { | |
7228 | error ("deprecated message is not a string"); | |
7229 | *no_add_attrs = true; | |
7230 | } | |
7231 | ||
f8e93a2e | 7232 | if (DECL_P (*node)) |
7233 | { | |
7234 | tree decl = *node; | |
7235 | type = TREE_TYPE (decl); | |
1cae46be | 7236 | |
f8e93a2e | 7237 | if (TREE_CODE (decl) == TYPE_DECL |
7238 | || TREE_CODE (decl) == PARM_DECL | |
7239 | || TREE_CODE (decl) == VAR_DECL | |
7240 | || TREE_CODE (decl) == FUNCTION_DECL | |
40c8d1dd | 7241 | || TREE_CODE (decl) == FIELD_DECL |
7242 | || objc_method_decl (TREE_CODE (decl))) | |
f8e93a2e | 7243 | TREE_DEPRECATED (decl) = 1; |
7244 | else | |
7245 | warn = 1; | |
7246 | } | |
7247 | else if (TYPE_P (*node)) | |
7248 | { | |
7249 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
e086912e | 7250 | *node = build_variant_type_copy (*node); |
f8e93a2e | 7251 | TREE_DEPRECATED (*node) = 1; |
7252 | type = *node; | |
7253 | } | |
7254 | else | |
7255 | warn = 1; | |
1cae46be | 7256 | |
f8e93a2e | 7257 | if (warn) |
7258 | { | |
7259 | *no_add_attrs = true; | |
7260 | if (type && TYPE_NAME (type)) | |
7261 | { | |
7262 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
782858b8 | 7263 | what = TYPE_NAME (*node); |
f8e93a2e | 7264 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
7265 | && DECL_NAME (TYPE_NAME (type))) | |
782858b8 | 7266 | what = DECL_NAME (TYPE_NAME (type)); |
f8e93a2e | 7267 | } |
7268 | if (what) | |
9b2d6d13 | 7269 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
f8e93a2e | 7270 | else |
9b2d6d13 | 7271 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7272 | } |
7273 | ||
7274 | return NULL_TREE; | |
7275 | } | |
7276 | ||
f8e93a2e | 7277 | /* Handle a "vector_size" attribute; arguments as in |
7278 | struct attribute_spec.handler. */ | |
7279 | ||
7280 | static tree | |
1cae46be | 7281 | handle_vector_size_attribute (tree *node, tree name, tree args, |
9a03a746 | 7282 | int ARG_UNUSED (flags), |
09347743 | 7283 | bool *no_add_attrs) |
f8e93a2e | 7284 | { |
7285 | unsigned HOST_WIDE_INT vecsize, nunits; | |
83e2a11b | 7286 | enum machine_mode orig_mode; |
4917c376 | 7287 | tree type = *node, new_type, size; |
f8e93a2e | 7288 | |
7289 | *no_add_attrs = true; | |
7290 | ||
4917c376 | 7291 | size = TREE_VALUE (args); |
4917c376 | 7292 | |
84166705 | 7293 | if (!host_integerp (size, 1)) |
f8e93a2e | 7294 | { |
9b2d6d13 | 7295 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
f8e93a2e | 7296 | return NULL_TREE; |
7297 | } | |
7298 | ||
7299 | /* Get the vector size (in bytes). */ | |
4917c376 | 7300 | vecsize = tree_low_cst (size, 1); |
f8e93a2e | 7301 | |
7302 | /* We need to provide for vector pointers, vector arrays, and | |
7303 | functions returning vectors. For example: | |
7304 | ||
7305 | __attribute__((vector_size(16))) short *foo; | |
7306 | ||
7307 | In this case, the mode is SI, but the type being modified is | |
7308 | HI, so we need to look further. */ | |
7309 | ||
7310 | while (POINTER_TYPE_P (type) | |
7311 | || TREE_CODE (type) == FUNCTION_TYPE | |
5bfb0742 | 7312 | || TREE_CODE (type) == METHOD_TYPE |
2cb0e5d9 | 7313 | || TREE_CODE (type) == ARRAY_TYPE |
7314 | || TREE_CODE (type) == OFFSET_TYPE) | |
f8e93a2e | 7315 | type = TREE_TYPE (type); |
7316 | ||
7317 | /* Get the mode of the type being modified. */ | |
7318 | orig_mode = TYPE_MODE (type); | |
7319 | ||
2cb0e5d9 | 7320 | if ((!INTEGRAL_TYPE_P (type) |
7321 | && !SCALAR_FLOAT_TYPE_P (type) | |
7322 | && !FIXED_POINT_TYPE_P (type)) | |
cee7491d | 7323 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
9421ebb9 | 7324 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
7325 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
7ec31215 | 7326 | || !host_integerp (TYPE_SIZE_UNIT (type), 1) |
7327 | || TREE_CODE (type) == BOOLEAN_TYPE) | |
f8e93a2e | 7328 | { |
782858b8 | 7329 | error ("invalid vector type for attribute %qE", name); |
f8e93a2e | 7330 | return NULL_TREE; |
7331 | } | |
7332 | ||
39cc3e6d | 7333 | if (vecsize % tree_low_cst (TYPE_SIZE_UNIT (type), 1)) |
7334 | { | |
7335 | error ("vector size not an integral multiple of component size"); | |
7336 | return NULL; | |
7337 | } | |
7338 | ||
7339 | if (vecsize == 0) | |
7340 | { | |
7341 | error ("zero vector size"); | |
7342 | return NULL; | |
7343 | } | |
7344 | ||
f8e93a2e | 7345 | /* Calculate how many units fit in the vector. */ |
7346 | nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
83e2a11b | 7347 | if (nunits & (nunits - 1)) |
f8e93a2e | 7348 | { |
83e2a11b | 7349 | error ("number of components of the vector not a power of two"); |
f8e93a2e | 7350 | return NULL_TREE; |
7351 | } | |
7352 | ||
83e2a11b | 7353 | new_type = build_vector_type (type, nunits); |
f8e93a2e | 7354 | |
7355 | /* Build back pointers if needed. */ | |
d991e6e8 | 7356 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
f8e93a2e | 7357 | |
7358 | return NULL_TREE; | |
7359 | } | |
7360 | ||
dbf6c367 | 7361 | /* Handle the "nonnull" attribute. */ |
7362 | static tree | |
9a03a746 | 7363 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
7364 | tree args, int ARG_UNUSED (flags), | |
09347743 | 7365 | bool *no_add_attrs) |
dbf6c367 | 7366 | { |
7367 | tree type = *node; | |
7368 | unsigned HOST_WIDE_INT attr_arg_num; | |
7369 | ||
7370 | /* If no arguments are specified, all pointer arguments should be | |
d716ce75 | 7371 | non-null. Verify a full prototype is given so that the arguments |
dbf6c367 | 7372 | will have the correct types when we actually check them later. */ |
84166705 | 7373 | if (!args) |
dbf6c367 | 7374 | { |
a36cf284 | 7375 | if (!prototype_p (type)) |
dbf6c367 | 7376 | { |
7377 | error ("nonnull attribute without arguments on a non-prototype"); | |
4ee9c684 | 7378 | *no_add_attrs = true; |
dbf6c367 | 7379 | } |
7380 | return NULL_TREE; | |
7381 | } | |
7382 | ||
7383 | /* Argument list specified. Verify that each argument number references | |
7384 | a pointer argument. */ | |
7385 | for (attr_arg_num = 1; args; args = TREE_CHAIN (args)) | |
7386 | { | |
7387 | tree argument; | |
4ee9c684 | 7388 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
dbf6c367 | 7389 | |
84166705 | 7390 | if (!get_nonnull_operand (TREE_VALUE (args), &arg_num)) |
dbf6c367 | 7391 | { |
07e3a3d2 | 7392 | error ("nonnull argument has invalid operand number (argument %lu)", |
dbf6c367 | 7393 | (unsigned long) attr_arg_num); |
7394 | *no_add_attrs = true; | |
7395 | return NULL_TREE; | |
7396 | } | |
7397 | ||
7398 | argument = TYPE_ARG_TYPES (type); | |
7399 | if (argument) | |
7400 | { | |
7401 | for (ck_num = 1; ; ck_num++) | |
7402 | { | |
84166705 | 7403 | if (!argument || ck_num == arg_num) |
dbf6c367 | 7404 | break; |
7405 | argument = TREE_CHAIN (argument); | |
7406 | } | |
7407 | ||
84166705 | 7408 | if (!argument |
dbf6c367 | 7409 | || TREE_CODE (TREE_VALUE (argument)) == VOID_TYPE) |
7410 | { | |
07e3a3d2 | 7411 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
dbf6c367 | 7412 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
7413 | *no_add_attrs = true; | |
7414 | return NULL_TREE; | |
7415 | } | |
7416 | ||
4ee9c684 | 7417 | if (TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE) |
dbf6c367 | 7418 | { |
07e3a3d2 | 7419 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
dbf6c367 | 7420 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
7421 | *no_add_attrs = true; | |
7422 | return NULL_TREE; | |
7423 | } | |
7424 | } | |
7425 | } | |
7426 | ||
7427 | return NULL_TREE; | |
7428 | } | |
7429 | ||
7430 | /* Check the argument list of a function call for null in argument slots | |
d01f58f9 | 7431 | that are marked as requiring a non-null pointer argument. The NARGS |
7432 | arguments are passed in the array ARGARRAY. | |
7433 | */ | |
dbf6c367 | 7434 | |
7435 | static void | |
d01f58f9 | 7436 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
dbf6c367 | 7437 | { |
d01f58f9 | 7438 | tree a, args; |
7439 | int i; | |
dbf6c367 | 7440 | |
7441 | for (a = attrs; a; a = TREE_CHAIN (a)) | |
7442 | { | |
7443 | if (is_attribute_p ("nonnull", TREE_PURPOSE (a))) | |
7444 | { | |
4ee9c684 | 7445 | args = TREE_VALUE (a); |
dbf6c367 | 7446 | |
4ee9c684 | 7447 | /* Walk the argument list. If we encounter an argument number we |
7448 | should check for non-null, do it. If the attribute has no args, | |
7449 | then every pointer argument is checked (in which case the check | |
dbf6c367 | 7450 | for pointer type is done in check_nonnull_arg). */ |
d01f58f9 | 7451 | for (i = 0; i < nargs; i++) |
4ee9c684 | 7452 | { |
d01f58f9 | 7453 | if (!args || nonnull_check_p (args, i + 1)) |
e4603171 | 7454 | check_function_arguments_recurse (check_nonnull_arg, NULL, |
d01f58f9 | 7455 | argarray[i], |
7456 | i + 1); | |
4ee9c684 | 7457 | } |
dbf6c367 | 7458 | } |
7459 | } | |
7460 | } | |
7461 | ||
50ca527f | 7462 | /* Check that the Nth argument of a function call (counting backwards |
d01f58f9 | 7463 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
7464 | array ARGARRAY. */ | |
bf6c8de0 | 7465 | |
7466 | static void | |
d01f58f9 | 7467 | check_function_sentinel (tree attrs, int nargs, tree *argarray, tree typelist) |
bf6c8de0 | 7468 | { |
7469 | tree attr = lookup_attribute ("sentinel", attrs); | |
7470 | ||
7471 | if (attr) | |
7472 | { | |
d01f58f9 | 7473 | int len = 0; |
7474 | int pos = 0; | |
7475 | tree sentinel; | |
a0c938f0 | 7476 | |
d01f58f9 | 7477 | /* Skip over the named arguments. */ |
7478 | while (typelist && len < nargs) | |
a0c938f0 | 7479 | { |
d01f58f9 | 7480 | typelist = TREE_CHAIN (typelist); |
7481 | len++; | |
7482 | } | |
50ca527f | 7483 | |
d01f58f9 | 7484 | if (TREE_VALUE (attr)) |
7485 | { | |
7486 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
7487 | pos = TREE_INT_CST_LOW (p); | |
7488 | } | |
50ca527f | 7489 | |
d01f58f9 | 7490 | /* The sentinel must be one of the varargs, i.e. |
7491 | in position >= the number of fixed arguments. */ | |
7492 | if ((nargs - 1 - pos) < len) | |
7493 | { | |
7494 | warning (OPT_Wformat, | |
7495 | "not enough variable arguments to fit a sentinel"); | |
7496 | return; | |
bf6c8de0 | 7497 | } |
d01f58f9 | 7498 | |
7499 | /* Validate the sentinel. */ | |
7500 | sentinel = argarray[nargs - 1 - pos]; | |
7501 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
7502 | || !integer_zerop (sentinel)) | |
7503 | /* Although __null (in C++) is only an integer we allow it | |
7504 | nevertheless, as we are guaranteed that it's exactly | |
7505 | as wide as a pointer, and we don't want to force | |
7506 | users to cast the NULL they have written there. | |
7507 | We warn with -Wstrict-null-sentinel, though. */ | |
7508 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
7509 | warning (OPT_Wformat, "missing sentinel in function call"); | |
bf6c8de0 | 7510 | } |
7511 | } | |
7512 | ||
dbf6c367 | 7513 | /* Helper for check_function_nonnull; given a list of operands which |
7514 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
7515 | checked. */ | |
7516 | ||
7517 | static bool | |
1cae46be | 7518 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 7519 | { |
4ee9c684 | 7520 | unsigned HOST_WIDE_INT arg_num = 0; |
dbf6c367 | 7521 | |
7522 | for (; args; args = TREE_CHAIN (args)) | |
7523 | { | |
231bd014 | 7524 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
7525 | ||
7526 | gcc_assert (found); | |
dbf6c367 | 7527 | |
7528 | if (arg_num == param_num) | |
7529 | return true; | |
7530 | } | |
7531 | return false; | |
7532 | } | |
7533 | ||
7534 | /* Check that the function argument PARAM (which is operand number | |
7535 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
7536 | via check_function_arguments_recurse. */ | |
7537 | ||
7538 | static void | |
9a03a746 | 7539 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
1cae46be | 7540 | unsigned HOST_WIDE_INT param_num) |
dbf6c367 | 7541 | { |
7542 | /* Just skip checking the argument if it's not a pointer. This can | |
7543 | happen if the "nonnull" attribute was given without an operand | |
7544 | list (which means to check every pointer argument). */ | |
7545 | ||
7546 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
7547 | return; | |
7548 | ||
7549 | if (integer_zerop (param)) | |
155b601b | 7550 | warning (OPT_Wnonnull, "null argument where non-null required " |
7551 | "(argument %lu)", (unsigned long) param_num); | |
dbf6c367 | 7552 | } |
7553 | ||
7554 | /* Helper for nonnull attribute handling; fetch the operand number | |
7555 | from the attribute argument list. */ | |
7556 | ||
7557 | static bool | |
1cae46be | 7558 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
dbf6c367 | 7559 | { |
67409385 | 7560 | /* Verify the arg number is a constant. */ |
dbf6c367 | 7561 | if (TREE_CODE (arg_num_expr) != INTEGER_CST |
7562 | || TREE_INT_CST_HIGH (arg_num_expr) != 0) | |
7563 | return false; | |
7564 | ||
7565 | *valp = TREE_INT_CST_LOW (arg_num_expr); | |
7566 | return true; | |
7567 | } | |
fa987697 | 7568 | |
7569 | /* Handle a "nothrow" attribute; arguments as in | |
7570 | struct attribute_spec.handler. */ | |
7571 | ||
7572 | static tree | |
9a03a746 | 7573 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
7574 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
fa987697 | 7575 | { |
7576 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
7577 | TREE_NOTHROW (*node) = 1; | |
7578 | /* ??? TODO: Support types. */ | |
7579 | else | |
7580 | { | |
9b2d6d13 | 7581 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
fa987697 | 7582 | *no_add_attrs = true; |
7583 | } | |
7584 | ||
7585 | return NULL_TREE; | |
7586 | } | |
7acb29a3 | 7587 | |
7588 | /* Handle a "cleanup" attribute; arguments as in | |
7589 | struct attribute_spec.handler. */ | |
7590 | ||
7591 | static tree | |
1cae46be | 7592 | handle_cleanup_attribute (tree *node, tree name, tree args, |
9a03a746 | 7593 | int ARG_UNUSED (flags), bool *no_add_attrs) |
7acb29a3 | 7594 | { |
7595 | tree decl = *node; | |
7596 | tree cleanup_id, cleanup_decl; | |
7597 | ||
7598 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
7599 | for global destructors in C++. This requires infrastructure that | |
7600 | we don't have generically at the moment. It's also not a feature | |
7601 | we'd be missing too much, since we do have attribute constructor. */ | |
7602 | if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)) | |
7603 | { | |
9b2d6d13 | 7604 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
7acb29a3 | 7605 | *no_add_attrs = true; |
7606 | return NULL_TREE; | |
7607 | } | |
7608 | ||
7609 | /* Verify that the argument is a function in scope. */ | |
7610 | /* ??? We could support pointers to functions here as well, if | |
7611 | that was considered desirable. */ | |
7612 | cleanup_id = TREE_VALUE (args); | |
7613 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
7614 | { | |
07e3a3d2 | 7615 | error ("cleanup argument not an identifier"); |
7acb29a3 | 7616 | *no_add_attrs = true; |
7617 | return NULL_TREE; | |
7618 | } | |
d1c41717 | 7619 | cleanup_decl = lookup_name (cleanup_id); |
7acb29a3 | 7620 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
7621 | { | |
07e3a3d2 | 7622 | error ("cleanup argument not a function"); |
7acb29a3 | 7623 | *no_add_attrs = true; |
7624 | return NULL_TREE; | |
7625 | } | |
7626 | ||
1cae46be | 7627 | /* That the function has proper type is checked with the |
7acb29a3 | 7628 | eventual call to build_function_call. */ |
7629 | ||
7630 | return NULL_TREE; | |
7631 | } | |
8a8cdb8d | 7632 | |
7633 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
7634 | ||
7635 | static tree | |
7636 | handle_warn_unused_result_attribute (tree *node, tree name, | |
9a03a746 | 7637 | tree ARG_UNUSED (args), |
7638 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
8a8cdb8d | 7639 | { |
7640 | /* Ignore the attribute for functions not returning any value. */ | |
7641 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
7642 | { | |
9b2d6d13 | 7643 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
8a8cdb8d | 7644 | *no_add_attrs = true; |
7645 | } | |
7646 | ||
7647 | return NULL_TREE; | |
7648 | } | |
bf6c8de0 | 7649 | |
7650 | /* Handle a "sentinel" attribute. */ | |
7651 | ||
7652 | static tree | |
50ca527f | 7653 | handle_sentinel_attribute (tree *node, tree name, tree args, |
bf6c8de0 | 7654 | int ARG_UNUSED (flags), bool *no_add_attrs) |
7655 | { | |
7656 | tree params = TYPE_ARG_TYPES (*node); | |
7657 | ||
a36cf284 | 7658 | if (!prototype_p (*node)) |
bf6c8de0 | 7659 | { |
9b2d6d13 | 7660 | warning (OPT_Wattributes, |
7661 | "%qE attribute requires prototypes with named arguments", name); | |
bf6c8de0 | 7662 | *no_add_attrs = true; |
bf6c8de0 | 7663 | } |
50ca527f | 7664 | else |
7665 | { | |
7666 | while (TREE_CHAIN (params)) | |
7667 | params = TREE_CHAIN (params); | |
bf6c8de0 | 7668 | |
50ca527f | 7669 | if (VOID_TYPE_P (TREE_VALUE (params))) |
a0c938f0 | 7670 | { |
9b2d6d13 | 7671 | warning (OPT_Wattributes, |
7672 | "%qE attribute only applies to variadic functions", name); | |
50ca527f | 7673 | *no_add_attrs = true; |
7674 | } | |
7675 | } | |
a0c938f0 | 7676 | |
50ca527f | 7677 | if (args) |
bf6c8de0 | 7678 | { |
50ca527f | 7679 | tree position = TREE_VALUE (args); |
7680 | ||
50ca527f | 7681 | if (TREE_CODE (position) != INTEGER_CST) |
a0c938f0 | 7682 | { |
48e1416a | 7683 | warning (OPT_Wattributes, |
01b54db5 | 7684 | "requested position is not an integer constant"); |
50ca527f | 7685 | *no_add_attrs = true; |
7686 | } | |
7687 | else | |
a0c938f0 | 7688 | { |
50ca527f | 7689 | if (tree_int_cst_lt (position, integer_zero_node)) |
7690 | { | |
01b54db5 | 7691 | warning (OPT_Wattributes, |
7692 | "requested position is less than zero"); | |
50ca527f | 7693 | *no_add_attrs = true; |
7694 | } | |
7695 | } | |
bf6c8de0 | 7696 | } |
a0c938f0 | 7697 | |
bf6c8de0 | 7698 | return NULL_TREE; |
7699 | } | |
b5c26b42 | 7700 | |
7701 | /* Handle a "type_generic" attribute. */ | |
7702 | ||
7703 | static tree | |
7704 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
7705 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
7706 | bool * ARG_UNUSED (no_add_attrs)) | |
7707 | { | |
19fbe3a4 | 7708 | tree params; |
48e1416a | 7709 | |
19fbe3a4 | 7710 | /* Ensure we have a function type. */ |
7711 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
48e1416a | 7712 | |
19fbe3a4 | 7713 | params = TYPE_ARG_TYPES (*node); |
7714 | while (params && ! VOID_TYPE_P (TREE_VALUE (params))) | |
7715 | params = TREE_CHAIN (params); | |
7716 | ||
7717 | /* Ensure we have a variadic function. */ | |
7718 | gcc_assert (!params); | |
b5c26b42 | 7719 | |
7720 | return NULL_TREE; | |
7721 | } | |
46f8e3b0 | 7722 | |
24470055 | 7723 | /* Handle a "target" attribute. */ |
46f8e3b0 | 7724 | |
7725 | static tree | |
24470055 | 7726 | handle_target_attribute (tree *node, tree name, tree args, int flags, |
46f8e3b0 | 7727 | bool *no_add_attrs) |
7728 | { | |
7729 | /* Ensure we have a function type. */ | |
7730 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7731 | { | |
7732 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7733 | *no_add_attrs = true; | |
7734 | } | |
46f8e3b0 | 7735 | else if (! targetm.target_option.valid_attribute_p (*node, name, args, |
7736 | flags)) | |
7737 | *no_add_attrs = true; | |
7738 | ||
7739 | return NULL_TREE; | |
7740 | } | |
7741 | ||
7742 | /* Arguments being collected for optimization. */ | |
7743 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
7744 | DEF_VEC_P(const_char_p); | |
7745 | DEF_VEC_ALLOC_P(const_char_p, gc); | |
7746 | static GTY(()) VEC(const_char_p, gc) *optimize_args; | |
7747 | ||
7748 | ||
7749 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
7750 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
7751 | false for #pragma GCC optimize. */ | |
7752 | ||
7753 | bool | |
7754 | parse_optimize_options (tree args, bool attr_p) | |
7755 | { | |
7756 | bool ret = true; | |
7757 | unsigned opt_argc; | |
7758 | unsigned i; | |
2becf397 | 7759 | int saved_flag_strict_aliasing; |
46f8e3b0 | 7760 | const char **opt_argv; |
615ef0bb | 7761 | struct cl_decoded_option *decoded_options; |
7762 | unsigned int decoded_options_count; | |
46f8e3b0 | 7763 | tree ap; |
7764 | ||
7765 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
7766 | collected strings. */ | |
7767 | VEC_truncate (const_char_p, optimize_args, 0); | |
7768 | VEC_safe_push (const_char_p, gc, optimize_args, NULL); | |
7769 | ||
7770 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
7771 | { | |
7772 | tree value = TREE_VALUE (ap); | |
7773 | ||
7774 | if (TREE_CODE (value) == INTEGER_CST) | |
7775 | { | |
7776 | char buffer[20]; | |
7777 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); | |
7778 | VEC_safe_push (const_char_p, gc, optimize_args, ggc_strdup (buffer)); | |
7779 | } | |
7780 | ||
7781 | else if (TREE_CODE (value) == STRING_CST) | |
7782 | { | |
7783 | /* Split string into multiple substrings. */ | |
7784 | size_t len = TREE_STRING_LENGTH (value); | |
7785 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
7786 | char *end = p + len; | |
7787 | char *comma; | |
7788 | char *next_p = p; | |
7789 | ||
7790 | while (next_p != NULL) | |
7791 | { | |
7792 | size_t len2; | |
7793 | char *q, *r; | |
7794 | ||
7795 | p = next_p; | |
7796 | comma = strchr (p, ','); | |
7797 | if (comma) | |
7798 | { | |
7799 | len2 = comma - p; | |
7800 | *comma = '\0'; | |
7801 | next_p = comma+1; | |
7802 | } | |
7803 | else | |
7804 | { | |
7805 | len2 = end - p; | |
7806 | next_p = NULL; | |
7807 | } | |
7808 | ||
ba72912a | 7809 | r = q = (char *) ggc_alloc_atomic (len2 + 3); |
46f8e3b0 | 7810 | |
7811 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx | |
7812 | options. */ | |
7813 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
7814 | { | |
7815 | ret = false; | |
7816 | if (attr_p) | |
7817 | warning (OPT_Wattributes, | |
ebd7c4c1 | 7818 | "bad option %s to optimize attribute", p); |
46f8e3b0 | 7819 | else |
7820 | warning (OPT_Wpragmas, | |
e44b0a1f | 7821 | "bad option %s to pragma attribute", p); |
46f8e3b0 | 7822 | continue; |
7823 | } | |
7824 | ||
7825 | if (*p != '-') | |
7826 | { | |
7827 | *r++ = '-'; | |
7828 | ||
7829 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
7830 | itself is -Os, and any other switch begins with a -f. */ | |
7831 | if ((*p >= '0' && *p <= '9') | |
7832 | || (p[0] == 's' && p[1] == '\0')) | |
7833 | *r++ = 'O'; | |
7834 | else if (*p != 'O') | |
7835 | *r++ = 'f'; | |
7836 | } | |
7837 | ||
7838 | memcpy (r, p, len2); | |
7839 | r[len2] = '\0'; | |
7840 | VEC_safe_push (const_char_p, gc, optimize_args, q); | |
7841 | } | |
7842 | ||
7843 | } | |
7844 | } | |
7845 | ||
7846 | opt_argc = VEC_length (const_char_p, optimize_args); | |
7847 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); | |
7848 | ||
7849 | for (i = 1; i < opt_argc; i++) | |
7850 | opt_argv[i] = VEC_index (const_char_p, optimize_args, i); | |
7851 | ||
2becf397 | 7852 | saved_flag_strict_aliasing = flag_strict_aliasing; |
7853 | ||
46f8e3b0 | 7854 | /* Now parse the options. */ |
f3f006ad | 7855 | decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv, |
7856 | &decoded_options, | |
7857 | &decoded_options_count); | |
7858 | decode_options (&global_options, &global_options_set, | |
3c6c0e40 | 7859 | decoded_options, decoded_options_count, |
7860 | input_location, global_dc); | |
46f8e3b0 | 7861 | |
4bec06b3 | 7862 | targetm.override_options_after_change(); |
7863 | ||
2becf397 | 7864 | /* Don't allow changing -fstrict-aliasing. */ |
7865 | flag_strict_aliasing = saved_flag_strict_aliasing; | |
7866 | ||
46f8e3b0 | 7867 | VEC_truncate (const_char_p, optimize_args, 0); |
7868 | return ret; | |
7869 | } | |
7870 | ||
7871 | /* For handling "optimize" attribute. arguments as in | |
7872 | struct attribute_spec.handler. */ | |
7873 | ||
7874 | static tree | |
7875 | handle_optimize_attribute (tree *node, tree name, tree args, | |
7876 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7877 | { | |
7878 | /* Ensure we have a function type. */ | |
7879 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7880 | { | |
7881 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7882 | *no_add_attrs = true; | |
7883 | } | |
7884 | else | |
7885 | { | |
7886 | struct cl_optimization cur_opts; | |
7887 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
7888 | ||
7889 | /* Save current options. */ | |
2c5d2e39 | 7890 | cl_optimization_save (&cur_opts, &global_options); |
46f8e3b0 | 7891 | |
7892 | /* If we previously had some optimization options, use them as the | |
7893 | default. */ | |
7894 | if (old_opts) | |
2c5d2e39 | 7895 | cl_optimization_restore (&global_options, |
7896 | TREE_OPTIMIZATION (old_opts)); | |
46f8e3b0 | 7897 | |
7898 | /* Parse options, and update the vector. */ | |
7899 | parse_optimize_options (args, true); | |
7900 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
7901 | = build_optimization_node (); | |
7902 | ||
7903 | /* Restore current options. */ | |
2c5d2e39 | 7904 | cl_optimization_restore (&global_options, &cur_opts); |
46f8e3b0 | 7905 | } |
7906 | ||
7907 | return NULL_TREE; | |
7908 | } | |
48b14f50 | 7909 | |
7910 | /* Handle a "no_split_stack" attribute. */ | |
7911 | ||
7912 | static tree | |
7913 | handle_no_split_stack_attribute (tree *node, tree name, | |
7914 | tree ARG_UNUSED (args), | |
7915 | int ARG_UNUSED (flags), | |
7916 | bool *no_add_attrs) | |
7917 | { | |
7918 | tree decl = *node; | |
7919 | ||
7920 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
7921 | { | |
7922 | error_at (DECL_SOURCE_LOCATION (decl), | |
7923 | "%qE attribute applies only to functions", name); | |
7924 | *no_add_attrs = true; | |
7925 | } | |
7926 | else if (DECL_INITIAL (decl)) | |
7927 | { | |
7928 | error_at (DECL_SOURCE_LOCATION (decl), | |
7929 | "can%'t set %qE attribute after definition", name); | |
7930 | *no_add_attrs = true; | |
7931 | } | |
7932 | ||
7933 | return NULL_TREE; | |
7934 | } | |
dbf6c367 | 7935 | \f |
d01f58f9 | 7936 | /* Check for valid arguments being passed to a function. |
7937 | ATTRS is a list of attributes. There are NARGS arguments in the array | |
7938 | ARGARRAY. TYPELIST is the list of argument types for the function. | |
7939 | */ | |
dbf6c367 | 7940 | void |
d01f58f9 | 7941 | check_function_arguments (tree attrs, int nargs, tree *argarray, tree typelist) |
dbf6c367 | 7942 | { |
7943 | /* Check for null being passed in a pointer argument that must be | |
7944 | non-null. We also need to do this if format checking is enabled. */ | |
7945 | ||
7946 | if (warn_nonnull) | |
d01f58f9 | 7947 | check_function_nonnull (attrs, nargs, argarray); |
dbf6c367 | 7948 | |
7949 | /* Check for errors in format strings. */ | |
7950 | ||
95c90e04 | 7951 | if (warn_format || warn_missing_format_attribute) |
d01f58f9 | 7952 | check_function_format (attrs, nargs, argarray); |
95c90e04 | 7953 | |
7954 | if (warn_format) | |
d01f58f9 | 7955 | check_function_sentinel (attrs, nargs, argarray, typelist); |
dbf6c367 | 7956 | } |
7957 | ||
7958 | /* Generic argument checking recursion routine. PARAM is the argument to | |
7959 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
7960 | once the argument is resolved. CTX is context for the callback. */ | |
7961 | void | |
1cae46be | 7962 | check_function_arguments_recurse (void (*callback) |
7963 | (void *, tree, unsigned HOST_WIDE_INT), | |
7964 | void *ctx, tree param, | |
7965 | unsigned HOST_WIDE_INT param_num) | |
dbf6c367 | 7966 | { |
72dd6141 | 7967 | if (CONVERT_EXPR_P (param) |
c44afe23 | 7968 | && (TYPE_PRECISION (TREE_TYPE (param)) |
7969 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
dbf6c367 | 7970 | { |
7971 | /* Strip coercion. */ | |
7972 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 7973 | TREE_OPERAND (param, 0), param_num); |
dbf6c367 | 7974 | return; |
7975 | } | |
7976 | ||
7977 | if (TREE_CODE (param) == CALL_EXPR) | |
7978 | { | |
c2f47e15 | 7979 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
dbf6c367 | 7980 | tree attrs; |
7981 | bool found_format_arg = false; | |
7982 | ||
7983 | /* See if this is a call to a known internationalization function | |
7984 | that modifies a format arg. Such a function may have multiple | |
7985 | format_arg attributes (for example, ngettext). */ | |
7986 | ||
7987 | for (attrs = TYPE_ATTRIBUTES (type); | |
7988 | attrs; | |
7989 | attrs = TREE_CHAIN (attrs)) | |
7990 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
7991 | { | |
c2f47e15 | 7992 | tree inner_arg; |
dbf6c367 | 7993 | tree format_num_expr; |
7994 | int format_num; | |
7995 | int i; | |
c2f47e15 | 7996 | call_expr_arg_iterator iter; |
dbf6c367 | 7997 | |
7998 | /* Extract the argument number, which was previously checked | |
7999 | to be valid. */ | |
8000 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
dbf6c367 | 8001 | |
231bd014 | 8002 | gcc_assert (TREE_CODE (format_num_expr) == INTEGER_CST |
8003 | && !TREE_INT_CST_HIGH (format_num_expr)); | |
dbf6c367 | 8004 | |
8005 | format_num = TREE_INT_CST_LOW (format_num_expr); | |
8006 | ||
c2f47e15 | 8007 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
8008 | inner_arg != 0; | |
8009 | inner_arg = next_call_expr_arg (&iter), i++) | |
dbf6c367 | 8010 | if (i == format_num) |
8011 | { | |
8012 | check_function_arguments_recurse (callback, ctx, | |
c2f47e15 | 8013 | inner_arg, param_num); |
dbf6c367 | 8014 | found_format_arg = true; |
8015 | break; | |
8016 | } | |
8017 | } | |
8018 | ||
8019 | /* If we found a format_arg attribute and did a recursive check, | |
8020 | we are done with checking this argument. Otherwise, we continue | |
8021 | and this will be considered a non-literal. */ | |
8022 | if (found_format_arg) | |
8023 | return; | |
8024 | } | |
8025 | ||
8026 | if (TREE_CODE (param) == COND_EXPR) | |
8027 | { | |
8028 | /* Check both halves of the conditional expression. */ | |
8029 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 8030 | TREE_OPERAND (param, 1), param_num); |
dbf6c367 | 8031 | check_function_arguments_recurse (callback, ctx, |
4ee9c684 | 8032 | TREE_OPERAND (param, 2), param_num); |
dbf6c367 | 8033 | return; |
8034 | } | |
8035 | ||
8036 | (*callback) (ctx, param, param_num); | |
8037 | } | |
1f3233d1 | 8038 | |
60cce472 | 8039 | /* Checks for a builtin function FNDECL that the number of arguments |
8040 | NARGS against the required number REQUIRED and issues an error if | |
8041 | there is a mismatch. Returns true if the number of arguments is | |
8042 | correct, otherwise false. */ | |
d43cee80 | 8043 | |
8044 | static bool | |
60cce472 | 8045 | builtin_function_validate_nargs (tree fndecl, int nargs, int required) |
d43cee80 | 8046 | { |
8047 | if (nargs < required) | |
8048 | { | |
60cce472 | 8049 | error_at (input_location, |
8050 | "not enough arguments to function %qE", fndecl); | |
d43cee80 | 8051 | return false; |
8052 | } | |
8053 | else if (nargs > required) | |
8054 | { | |
60cce472 | 8055 | error_at (input_location, |
8056 | "too many arguments to function %qE", fndecl); | |
d43cee80 | 8057 | return false; |
8058 | } | |
8059 | return true; | |
8060 | } | |
8061 | ||
8062 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
8063 | Returns false if there was an error, otherwise true. */ | |
8064 | ||
8065 | bool | |
8066 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
8067 | { | |
8068 | if (!DECL_BUILT_IN (fndecl) | |
8069 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
8070 | return true; | |
8071 | ||
8072 | switch (DECL_FUNCTION_CODE (fndecl)) | |
8073 | { | |
8074 | case BUILT_IN_CONSTANT_P: | |
60cce472 | 8075 | return builtin_function_validate_nargs (fndecl, nargs, 1); |
d43cee80 | 8076 | |
8077 | case BUILT_IN_ISFINITE: | |
8078 | case BUILT_IN_ISINF: | |
c319d56a | 8079 | case BUILT_IN_ISINF_SIGN: |
d43cee80 | 8080 | case BUILT_IN_ISNAN: |
8081 | case BUILT_IN_ISNORMAL: | |
60cce472 | 8082 | if (builtin_function_validate_nargs (fndecl, nargs, 1)) |
d43cee80 | 8083 | { |
8084 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
8085 | { | |
8086 | error ("non-floating-point argument in call to " | |
8087 | "function %qE", fndecl); | |
8088 | return false; | |
8089 | } | |
8090 | return true; | |
8091 | } | |
8092 | return false; | |
8093 | ||
8094 | case BUILT_IN_ISGREATER: | |
8095 | case BUILT_IN_ISGREATEREQUAL: | |
8096 | case BUILT_IN_ISLESS: | |
8097 | case BUILT_IN_ISLESSEQUAL: | |
8098 | case BUILT_IN_ISLESSGREATER: | |
8099 | case BUILT_IN_ISUNORDERED: | |
60cce472 | 8100 | if (builtin_function_validate_nargs (fndecl, nargs, 2)) |
d43cee80 | 8101 | { |
8102 | enum tree_code code0, code1; | |
8103 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
8104 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
8105 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
8106 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
8107 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
8108 | { | |
8109 | error ("non-floating-point arguments in call to " | |
8110 | "function %qE", fndecl); | |
8111 | return false; | |
8112 | } | |
8113 | return true; | |
8114 | } | |
8115 | return false; | |
8116 | ||
19fbe3a4 | 8117 | case BUILT_IN_FPCLASSIFY: |
60cce472 | 8118 | if (builtin_function_validate_nargs (fndecl, nargs, 6)) |
19fbe3a4 | 8119 | { |
8120 | unsigned i; | |
48e1416a | 8121 | |
19fbe3a4 | 8122 | for (i=0; i<5; i++) |
8123 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
8124 | { | |
8125 | error ("non-const integer argument %u in call to function %qE", | |
8126 | i+1, fndecl); | |
8127 | return false; | |
8128 | } | |
8129 | ||
8130 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
8131 | { | |
8132 | error ("non-floating-point argument in call to function %qE", | |
8133 | fndecl); | |
8134 | return false; | |
8135 | } | |
8136 | return true; | |
8137 | } | |
8138 | return false; | |
8139 | ||
d43cee80 | 8140 | default: |
8141 | return true; | |
8142 | } | |
8143 | } | |
8144 | ||
860251be | 8145 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
8146 | ||
8147 | int | |
8148 | field_decl_cmp (const void *x_p, const void *y_p) | |
8149 | { | |
4fd61bc6 | 8150 | const tree *const x = (const tree *const) x_p; |
8151 | const tree *const y = (const tree *const) y_p; | |
8152 | ||
860251be | 8153 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
8154 | /* A nontype is "greater" than a type. */ | |
8155 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
8156 | if (DECL_NAME (*x) == NULL_TREE) | |
8157 | return -1; | |
8158 | if (DECL_NAME (*y) == NULL_TREE) | |
8159 | return 1; | |
8160 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
8161 | return -1; | |
8162 | return 1; | |
8163 | } | |
8164 | ||
8165 | static struct { | |
8166 | gt_pointer_operator new_value; | |
8167 | void *cookie; | |
8168 | } resort_data; | |
8169 | ||
8170 | /* This routine compares two fields like field_decl_cmp but using the | |
8171 | pointer operator in resort_data. */ | |
8172 | ||
8173 | static int | |
8174 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
8175 | { | |
4fd61bc6 | 8176 | const tree *const x = (const tree *const) x_p; |
8177 | const tree *const y = (const tree *const) y_p; | |
860251be | 8178 | |
8179 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
8180 | /* A nontype is "greater" than a type. */ | |
8181 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
8182 | if (DECL_NAME (*x) == NULL_TREE) | |
8183 | return -1; | |
8184 | if (DECL_NAME (*y) == NULL_TREE) | |
8185 | return 1; | |
8186 | { | |
8187 | tree d1 = DECL_NAME (*x); | |
8188 | tree d2 = DECL_NAME (*y); | |
8189 | resort_data.new_value (&d1, resort_data.cookie); | |
8190 | resort_data.new_value (&d2, resort_data.cookie); | |
8191 | if (d1 < d2) | |
8192 | return -1; | |
8193 | } | |
8194 | return 1; | |
8195 | } | |
8196 | ||
8197 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
8198 | ||
8199 | void | |
8200 | resort_sorted_fields (void *obj, | |
9a03a746 | 8201 | void * ARG_UNUSED (orig_obj), |
4ee9c684 | 8202 | gt_pointer_operator new_value, |
8203 | void *cookie) | |
860251be | 8204 | { |
9a03a746 | 8205 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
860251be | 8206 | resort_data.new_value = new_value; |
8207 | resort_data.cookie = cookie; | |
8208 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
4ee9c684 | 8209 | resort_field_decl_cmp); |
860251be | 8210 | } |
8211 | ||
209c9752 | 8212 | /* Subroutine of c_parse_error. |
8213 | Return the result of concatenating LHS and RHS. RHS is really | |
8214 | a string literal, its first character is indicated by RHS_START and | |
cfee01e3 | 8215 | RHS_SIZE is its length (including the terminating NUL character). |
209c9752 | 8216 | |
8217 | The caller is responsible for deleting the returned pointer. */ | |
8218 | ||
8219 | static char * | |
8220 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
8221 | { | |
8222 | const int lhs_size = strlen (lhs); | |
8223 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
8224 | strncpy (result, lhs, lhs_size); | |
8225 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
8226 | return result; | |
8227 | } | |
8228 | ||
380c6697 | 8229 | /* Issue the error given by GMSGID, indicating that it occurred before |
92b128ed | 8230 | TOKEN, which had the associated VALUE. */ |
8231 | ||
8232 | void | |
48e1416a | 8233 | c_parse_error (const char *gmsgid, enum cpp_ttype token_type, |
ba99525e | 8234 | tree value, unsigned char token_flags) |
92b128ed | 8235 | { |
209c9752 | 8236 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
8237 | ||
8238 | char *message = NULL; | |
92b128ed | 8239 | |
ba99525e | 8240 | if (token_type == CPP_EOF) |
380c6697 | 8241 | message = catenate_messages (gmsgid, " at end of input"); |
48e1416a | 8242 | else if (token_type == CPP_CHAR |
8243 | || token_type == CPP_WCHAR | |
ba99525e | 8244 | || token_type == CPP_CHAR16 |
8245 | || token_type == CPP_CHAR32) | |
92b128ed | 8246 | { |
8247 | unsigned int val = TREE_INT_CST_LOW (value); | |
924bbf02 | 8248 | const char *prefix; |
8249 | ||
ba99525e | 8250 | switch (token_type) |
924bbf02 | 8251 | { |
8252 | default: | |
8253 | prefix = ""; | |
8254 | break; | |
8255 | case CPP_WCHAR: | |
8256 | prefix = "L"; | |
8257 | break; | |
8258 | case CPP_CHAR16: | |
8259 | prefix = "u"; | |
8260 | break; | |
8261 | case CPP_CHAR32: | |
8262 | prefix = "U"; | |
8263 | break; | |
8264 | } | |
8265 | ||
92b128ed | 8266 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
a0c938f0 | 8267 | message = catenate_messages (gmsgid, " before %s'%c'"); |
92b128ed | 8268 | else |
a0c938f0 | 8269 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
209c9752 | 8270 | |
924bbf02 | 8271 | error (message, prefix, val); |
209c9752 | 8272 | free (message); |
8273 | message = NULL; | |
92b128ed | 8274 | } |
48e1416a | 8275 | else if (token_type == CPP_STRING |
8276 | || token_type == CPP_WSTRING | |
ba99525e | 8277 | || token_type == CPP_STRING16 |
538ba11a | 8278 | || token_type == CPP_STRING32 |
8279 | || token_type == CPP_UTF8STRING) | |
380c6697 | 8280 | message = catenate_messages (gmsgid, " before string constant"); |
ba99525e | 8281 | else if (token_type == CPP_NUMBER) |
380c6697 | 8282 | message = catenate_messages (gmsgid, " before numeric constant"); |
ba99525e | 8283 | else if (token_type == CPP_NAME) |
209c9752 | 8284 | { |
380c6697 | 8285 | message = catenate_messages (gmsgid, " before %qE"); |
782858b8 | 8286 | error (message, value); |
209c9752 | 8287 | free (message); |
8288 | message = NULL; | |
8289 | } | |
ba99525e | 8290 | else if (token_type == CPP_PRAGMA) |
b75b98aa | 8291 | message = catenate_messages (gmsgid, " before %<#pragma%>"); |
ba99525e | 8292 | else if (token_type == CPP_PRAGMA_EOL) |
b75b98aa | 8293 | message = catenate_messages (gmsgid, " before end of line"); |
ba99525e | 8294 | else if (token_type < N_TTYPES) |
209c9752 | 8295 | { |
380c6697 | 8296 | message = catenate_messages (gmsgid, " before %qs token"); |
ba99525e | 8297 | error (message, cpp_type2name (token_type, token_flags)); |
209c9752 | 8298 | free (message); |
8299 | message = NULL; | |
8300 | } | |
92b128ed | 8301 | else |
380c6697 | 8302 | error (gmsgid); |
209c9752 | 8303 | |
8304 | if (message) | |
8305 | { | |
8306 | error (message); | |
8307 | free (message); | |
8308 | } | |
a0c938f0 | 8309 | #undef catenate_messages |
92b128ed | 8310 | } |
8311 | ||
3a79f5da | 8312 | /* Mapping for cpp message reasons to the options that enable them. */ |
8313 | ||
8314 | struct reason_option_codes_t | |
8315 | { | |
8316 | const int reason; /* cpplib message reason. */ | |
8317 | const int option_code; /* gcc option that controls this message. */ | |
8318 | }; | |
8319 | ||
8320 | static const struct reason_option_codes_t option_codes[] = { | |
8321 | {CPP_W_DEPRECATED, OPT_Wdeprecated}, | |
67089c6b | 8322 | {CPP_W_COMMENTS, OPT_Wcomment}, |
3a79f5da | 8323 | {CPP_W_TRIGRAPHS, OPT_Wtrigraphs}, |
8324 | {CPP_W_MULTICHAR, OPT_Wmultichar}, | |
8325 | {CPP_W_TRADITIONAL, OPT_Wtraditional}, | |
8326 | {CPP_W_LONG_LONG, OPT_Wlong_long}, | |
8327 | {CPP_W_ENDIF_LABELS, OPT_Wendif_labels}, | |
8328 | {CPP_W_VARIADIC_MACROS, OPT_Wvariadic_macros}, | |
8329 | {CPP_W_BUILTIN_MACRO_REDEFINED, OPT_Wbuiltin_macro_redefined}, | |
8330 | {CPP_W_UNDEF, OPT_Wundef}, | |
8331 | {CPP_W_UNUSED_MACROS, OPT_Wunused_macros}, | |
8332 | {CPP_W_CXX_OPERATOR_NAMES, OPT_Wc___compat}, | |
8333 | {CPP_W_NORMALIZE, OPT_Wnormalized_}, | |
8334 | {CPP_W_INVALID_PCH, OPT_Winvalid_pch}, | |
8335 | {CPP_W_WARNING_DIRECTIVE, OPT_Wcpp}, | |
8336 | {CPP_W_NONE, 0} | |
8337 | }; | |
8338 | ||
8339 | /* Return the gcc option code associated with the reason for a cpp | |
8340 | message, or 0 if none. */ | |
8341 | ||
8342 | static int | |
8343 | c_option_controlling_cpp_error (int reason) | |
8344 | { | |
8345 | const struct reason_option_codes_t *entry; | |
8346 | ||
8347 | for (entry = option_codes; entry->reason != CPP_W_NONE; entry++) | |
8348 | { | |
8349 | if (entry->reason == reason) | |
8350 | return entry->option_code; | |
8351 | } | |
8352 | return 0; | |
8353 | } | |
8354 | ||
7f5f3953 | 8355 | /* Callback from cpp_error for PFILE to print diagnostics from the |
3a79f5da | 8356 | preprocessor. The diagnostic is of type LEVEL, with REASON set |
8357 | to the reason code if LEVEL is represents a warning, at location | |
7f5f3953 | 8358 | LOCATION unless this is after lexing and the compiler's location |
8359 | should be used instead, with column number possibly overridden by | |
8360 | COLUMN_OVERRIDE if not zero; MSG is the translated message and AP | |
8361 | the arguments. Returns true if a diagnostic was emitted, false | |
8362 | otherwise. */ | |
8363 | ||
8364 | bool | |
3a79f5da | 8365 | c_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level, int reason, |
7f5f3953 | 8366 | location_t location, unsigned int column_override, |
8367 | const char *msg, va_list *ap) | |
8368 | { | |
8369 | diagnostic_info diagnostic; | |
8370 | diagnostic_t dlevel; | |
5ae82d58 | 8371 | bool save_warn_system_headers = global_dc->dc_warn_system_headers; |
7f5f3953 | 8372 | bool ret; |
8373 | ||
8374 | switch (level) | |
8375 | { | |
8376 | case CPP_DL_WARNING_SYSHDR: | |
8377 | if (flag_no_output) | |
8378 | return false; | |
5ae82d58 | 8379 | global_dc->dc_warn_system_headers = 1; |
7f5f3953 | 8380 | /* Fall through. */ |
8381 | case CPP_DL_WARNING: | |
8382 | if (flag_no_output) | |
8383 | return false; | |
8384 | dlevel = DK_WARNING; | |
8385 | break; | |
8386 | case CPP_DL_PEDWARN: | |
8387 | if (flag_no_output && !flag_pedantic_errors) | |
8388 | return false; | |
8389 | dlevel = DK_PEDWARN; | |
8390 | break; | |
8391 | case CPP_DL_ERROR: | |
8392 | dlevel = DK_ERROR; | |
8393 | break; | |
8394 | case CPP_DL_ICE: | |
8395 | dlevel = DK_ICE; | |
8396 | break; | |
8397 | case CPP_DL_NOTE: | |
8398 | dlevel = DK_NOTE; | |
8399 | break; | |
ff903809 | 8400 | case CPP_DL_FATAL: |
8401 | dlevel = DK_FATAL; | |
8402 | break; | |
7f5f3953 | 8403 | default: |
8404 | gcc_unreachable (); | |
8405 | } | |
8406 | if (done_lexing) | |
8407 | location = input_location; | |
8408 | diagnostic_set_info_translated (&diagnostic, msg, ap, | |
8409 | location, dlevel); | |
8410 | if (column_override) | |
8411 | diagnostic_override_column (&diagnostic, column_override); | |
3a79f5da | 8412 | diagnostic_override_option_index (&diagnostic, |
8413 | c_option_controlling_cpp_error (reason)); | |
7f5f3953 | 8414 | ret = report_diagnostic (&diagnostic); |
8415 | if (level == CPP_DL_WARNING_SYSHDR) | |
5ae82d58 | 8416 | global_dc->dc_warn_system_headers = save_warn_system_headers; |
7f5f3953 | 8417 | return ret; |
8418 | } | |
8419 | ||
624d37a6 | 8420 | /* Convert a character from the host to the target execution character |
8421 | set. cpplib handles this, mostly. */ | |
8422 | ||
8423 | HOST_WIDE_INT | |
8424 | c_common_to_target_charset (HOST_WIDE_INT c) | |
8425 | { | |
8426 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
8427 | zero-extended under -fno-signed-char. cpplib insists that characters | |
8428 | and character constants are always unsigned. Hence we must convert | |
8429 | back and forth. */ | |
8430 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
8431 | ||
8432 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
8433 | ||
8434 | if (flag_signed_char) | |
8435 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
8436 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
8437 | else | |
8438 | return uc; | |
8439 | } | |
8440 | ||
af28855b | 8441 | /* Build the result of __builtin_offsetof. EXPR is a nested sequence of |
d897f7c2 | 8442 | component references, with STOP_REF, or alternatively an INDIRECT_REF of |
8443 | NULL, at the bottom; much like the traditional rendering of offsetof as a | |
8444 | macro. Returns the folded and properly cast result. */ | |
af28855b | 8445 | |
8446 | static tree | |
d897f7c2 | 8447 | fold_offsetof_1 (tree expr, tree stop_ref) |
af28855b | 8448 | { |
8449 | enum tree_code code = PLUS_EXPR; | |
8450 | tree base, off, t; | |
8451 | ||
d897f7c2 | 8452 | if (expr == stop_ref && TREE_CODE (expr) != ERROR_MARK) |
8453 | return size_zero_node; | |
8454 | ||
af28855b | 8455 | switch (TREE_CODE (expr)) |
8456 | { | |
8457 | case ERROR_MARK: | |
8458 | return expr; | |
8459 | ||
6b11d2e3 | 8460 | case VAR_DECL: |
8461 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
8462 | return error_mark_node; | |
8463 | ||
d897f7c2 | 8464 | case CALL_EXPR: |
cf1a89a3 | 8465 | case TARGET_EXPR: |
d897f7c2 | 8466 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); |
8467 | return error_mark_node; | |
8468 | ||
d897f7c2 | 8469 | case NOP_EXPR: |
8470 | case INDIRECT_REF: | |
64ed018c | 8471 | if (!integer_zerop (TREE_OPERAND (expr, 0))) |
8472 | { | |
8473 | error ("cannot apply %<offsetof%> to a non constant address"); | |
8474 | return error_mark_node; | |
8475 | } | |
8476 | return size_zero_node; | |
d897f7c2 | 8477 | |
af28855b | 8478 | case COMPONENT_REF: |
d897f7c2 | 8479 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
af28855b | 8480 | if (base == error_mark_node) |
8481 | return base; | |
8482 | ||
8483 | t = TREE_OPERAND (expr, 1); | |
8484 | if (DECL_C_BIT_FIELD (t)) | |
8485 | { | |
8486 | error ("attempt to take address of bit-field structure " | |
782858b8 | 8487 | "member %qD", t); |
af28855b | 8488 | return error_mark_node; |
8489 | } | |
389dd41b | 8490 | off = size_binop_loc (input_location, PLUS_EXPR, DECL_FIELD_OFFSET (t), |
8491 | size_int (tree_low_cst (DECL_FIELD_BIT_OFFSET (t), | |
8492 | 1) | |
8493 | / BITS_PER_UNIT)); | |
af28855b | 8494 | break; |
8495 | ||
8496 | case ARRAY_REF: | |
d897f7c2 | 8497 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
af28855b | 8498 | if (base == error_mark_node) |
8499 | return base; | |
8500 | ||
8501 | t = TREE_OPERAND (expr, 1); | |
8502 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) < 0) | |
8503 | { | |
8504 | code = MINUS_EXPR; | |
389dd41b | 8505 | t = fold_build1_loc (input_location, NEGATE_EXPR, TREE_TYPE (t), t); |
af28855b | 8506 | } |
8507 | t = convert (sizetype, t); | |
8508 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
64ed018c | 8509 | |
8510 | /* Check if the offset goes beyond the upper bound of the array. */ | |
e0559d69 | 8511 | if (code == PLUS_EXPR && TREE_CODE (t) == INTEGER_CST) |
8512 | { | |
8513 | tree upbound = array_ref_up_bound (expr); | |
8514 | if (upbound != NULL_TREE | |
8515 | && TREE_CODE (upbound) == INTEGER_CST | |
8516 | && !tree_int_cst_equal (upbound, | |
8517 | TYPE_MAX_VALUE (TREE_TYPE (upbound)))) | |
8518 | { | |
8519 | upbound = size_binop (PLUS_EXPR, upbound, | |
8520 | build_int_cst (TREE_TYPE (upbound), 1)); | |
8521 | if (tree_int_cst_lt (upbound, t)) | |
8522 | { | |
8523 | tree v; | |
8524 | ||
8525 | for (v = TREE_OPERAND (expr, 0); | |
8526 | TREE_CODE (v) == COMPONENT_REF; | |
8527 | v = TREE_OPERAND (v, 0)) | |
8528 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (v, 0))) | |
8529 | == RECORD_TYPE) | |
8530 | { | |
1767a056 | 8531 | tree fld_chain = DECL_CHAIN (TREE_OPERAND (v, 1)); |
8532 | for (; fld_chain; fld_chain = DECL_CHAIN (fld_chain)) | |
e0559d69 | 8533 | if (TREE_CODE (fld_chain) == FIELD_DECL) |
8534 | break; | |
8535 | ||
8536 | if (fld_chain) | |
8537 | break; | |
8538 | } | |
8539 | /* Don't warn if the array might be considered a poor | |
8540 | man's flexible array member with a very permissive | |
8541 | definition thereof. */ | |
8542 | if (TREE_CODE (v) == ARRAY_REF | |
8543 | || TREE_CODE (v) == COMPONENT_REF) | |
8544 | warning (OPT_Warray_bounds, | |
8545 | "index %E denotes an offset " | |
8546 | "greater than size of %qT", | |
8547 | t, TREE_TYPE (TREE_OPERAND (expr, 0))); | |
8548 | } | |
8549 | } | |
8550 | } | |
af28855b | 8551 | break; |
8552 | ||
ede90cc2 | 8553 | case COMPOUND_EXPR: |
8554 | /* Handle static members of volatile structs. */ | |
8555 | t = TREE_OPERAND (expr, 1); | |
8556 | gcc_assert (TREE_CODE (t) == VAR_DECL); | |
8557 | return fold_offsetof_1 (t, stop_ref); | |
8558 | ||
af28855b | 8559 | default: |
231bd014 | 8560 | gcc_unreachable (); |
af28855b | 8561 | } |
8562 | ||
8563 | return size_binop (code, base, off); | |
8564 | } | |
8565 | ||
8566 | tree | |
d897f7c2 | 8567 | fold_offsetof (tree expr, tree stop_ref) |
af28855b | 8568 | { |
8569 | /* Convert back from the internal sizetype to size_t. */ | |
d897f7c2 | 8570 | return convert (size_type_node, fold_offsetof_1 (expr, stop_ref)); |
af28855b | 8571 | } |
8572 | ||
b9bdfa0b | 8573 | /* Warn for A ?: C expressions (with B omitted) where A is a boolean |
8574 | expression, because B will always be true. */ | |
8575 | ||
8576 | void | |
8577 | warn_for_omitted_condop (location_t location, tree cond) | |
8578 | { | |
8579 | if (truth_value_p (TREE_CODE (cond))) | |
8580 | warning_at (location, OPT_Wparentheses, | |
8581 | "the omitted middle operand in ?: will always be %<true%>, " | |
8582 | "suggest explicit middle operand"); | |
8583 | } | |
8584 | ||
a1f90215 | 8585 | /* Give an error for storing into ARG, which is 'const'. USE indicates |
8586 | how ARG was being used. */ | |
8587 | ||
8588 | void | |
8589 | readonly_error (tree arg, enum lvalue_use use) | |
8590 | { | |
8591 | gcc_assert (use == lv_assign || use == lv_increment || use == lv_decrement | |
8592 | || use == lv_asm); | |
8593 | /* Using this macro rather than (for example) arrays of messages | |
8594 | ensures that all the format strings are checked at compile | |
8595 | time. */ | |
8596 | #define READONLY_MSG(A, I, D, AS) (use == lv_assign ? (A) \ | |
8597 | : (use == lv_increment ? (I) \ | |
8598 | : (use == lv_decrement ? (D) : (AS)))) | |
8599 | if (TREE_CODE (arg) == COMPONENT_REF) | |
8600 | { | |
8601 | if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0)))) | |
8602 | error (READONLY_MSG (G_("assignment of member " | |
8603 | "%qD in read-only object"), | |
8604 | G_("increment of member " | |
8605 | "%qD in read-only object"), | |
8606 | G_("decrement of member " | |
8607 | "%qD in read-only object"), | |
8608 | G_("member %qD in read-only object " | |
8609 | "used as %<asm%> output")), | |
8610 | TREE_OPERAND (arg, 1)); | |
8611 | else | |
8612 | error (READONLY_MSG (G_("assignment of read-only member %qD"), | |
8613 | G_("increment of read-only member %qD"), | |
8614 | G_("decrement of read-only member %qD"), | |
8615 | G_("read-only member %qD used as %<asm%> output")), | |
8616 | TREE_OPERAND (arg, 1)); | |
8617 | } | |
8618 | else if (TREE_CODE (arg) == VAR_DECL) | |
8619 | error (READONLY_MSG (G_("assignment of read-only variable %qD"), | |
8620 | G_("increment of read-only variable %qD"), | |
8621 | G_("decrement of read-only variable %qD"), | |
8622 | G_("read-only variable %qD used as %<asm%> output")), | |
8623 | arg); | |
8624 | else if (TREE_CODE (arg) == PARM_DECL) | |
8625 | error (READONLY_MSG (G_("assignment of read-only parameter %qD"), | |
8626 | G_("increment of read-only parameter %qD"), | |
8627 | G_("decrement of read-only parameter %qD"), | |
8628 | G_("read-only parameter %qD use as %<asm%> output")), | |
8629 | arg); | |
8630 | else if (TREE_CODE (arg) == RESULT_DECL) | |
8631 | { | |
8632 | gcc_assert (c_dialect_cxx ()); | |
8633 | error (READONLY_MSG (G_("assignment of " | |
8634 | "read-only named return value %qD"), | |
8635 | G_("increment of " | |
8636 | "read-only named return value %qD"), | |
8637 | G_("decrement of " | |
8638 | "read-only named return value %qD"), | |
8639 | G_("read-only named return value %qD " | |
8640 | "used as %<asm%>output")), | |
8641 | arg); | |
8642 | } | |
8643 | else if (TREE_CODE (arg) == FUNCTION_DECL) | |
8644 | error (READONLY_MSG (G_("assignment of function %qD"), | |
8645 | G_("increment of function %qD"), | |
8646 | G_("decrement of function %qD"), | |
8647 | G_("function %qD used as %<asm%> output")), | |
8648 | arg); | |
8649 | else | |
8650 | error (READONLY_MSG (G_("assignment of read-only location %qE"), | |
8651 | G_("increment of read-only location %qE"), | |
8652 | G_("decrement of read-only location %qE"), | |
8653 | G_("read-only location %qE used as %<asm%> output")), | |
8654 | arg); | |
8655 | } | |
8656 | ||
e35976b1 | 8657 | /* Print an error message for an invalid lvalue. USE says |
fdd84b77 | 8658 | how the lvalue is being used and so selects the error message. LOC |
8659 | is the location for the error. */ | |
ab6bb714 | 8660 | |
e35976b1 | 8661 | void |
fdd84b77 | 8662 | lvalue_error (location_t loc, enum lvalue_use use) |
ab6bb714 | 8663 | { |
e35976b1 | 8664 | switch (use) |
ab6bb714 | 8665 | { |
e35976b1 | 8666 | case lv_assign: |
fdd84b77 | 8667 | error_at (loc, "lvalue required as left operand of assignment"); |
e35976b1 | 8668 | break; |
8669 | case lv_increment: | |
fdd84b77 | 8670 | error_at (loc, "lvalue required as increment operand"); |
e35976b1 | 8671 | break; |
8672 | case lv_decrement: | |
fdd84b77 | 8673 | error_at (loc, "lvalue required as decrement operand"); |
e35976b1 | 8674 | break; |
8675 | case lv_addressof: | |
fdd84b77 | 8676 | error_at (loc, "lvalue required as unary %<&%> operand"); |
e35976b1 | 8677 | break; |
8678 | case lv_asm: | |
fdd84b77 | 8679 | error_at (loc, "lvalue required in asm statement"); |
e35976b1 | 8680 | break; |
8681 | default: | |
8682 | gcc_unreachable (); | |
ab6bb714 | 8683 | } |
ab6bb714 | 8684 | } |
b1bbc8e5 | 8685 | |
8686 | /* Print an error message for an invalid indirection of type TYPE. | |
8687 | ERRSTRING is the name of the operator for the indirection. */ | |
8688 | ||
8689 | void | |
8690 | invalid_indirection_error (location_t loc, tree type, ref_operator errstring) | |
8691 | { | |
8692 | switch (errstring) | |
8693 | { | |
8694 | case RO_NULL: | |
8695 | gcc_assert (c_dialect_cxx ()); | |
8696 | error_at (loc, "invalid type argument (have %qT)", type); | |
8697 | break; | |
8698 | case RO_ARRAY_INDEXING: | |
8699 | error_at (loc, | |
8700 | "invalid type argument of array indexing (have %qT)", | |
8701 | type); | |
8702 | break; | |
8703 | case RO_UNARY_STAR: | |
8704 | error_at (loc, | |
8705 | "invalid type argument of unary %<*%> (have %qT)", | |
8706 | type); | |
8707 | break; | |
8708 | case RO_ARROW: | |
8709 | error_at (loc, | |
8710 | "invalid type argument of %<->%> (have %qT)", | |
8711 | type); | |
8712 | break; | |
8713 | case RO_IMPLICIT_CONVERSION: | |
8714 | error_at (loc, | |
8715 | "invalid type argument of implicit conversion (have %qT)", | |
8716 | type); | |
8717 | break; | |
8718 | default: | |
8719 | gcc_unreachable (); | |
8720 | } | |
8721 | } | |
c271bdb2 | 8722 | \f |
8723 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
8724 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
8725 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
8726 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
8727 | ||
8728 | int | |
8729 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
8730 | { | |
8731 | tree maxindex, type, main_type, elt, unqual_elt; | |
8732 | int failure = 0, quals; | |
6753bca0 | 8733 | hashval_t hashcode = 0; |
c271bdb2 | 8734 | |
8735 | maxindex = size_zero_node; | |
8736 | if (initial_value) | |
8737 | { | |
8738 | if (TREE_CODE (initial_value) == STRING_CST) | |
8739 | { | |
8740 | int eltsize | |
8741 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
8742 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
8743 | } | |
8744 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
8745 | { | |
c75b4594 | 8746 | VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value); |
c271bdb2 | 8747 | |
c75b4594 | 8748 | if (VEC_empty (constructor_elt, v)) |
c271bdb2 | 8749 | { |
8750 | if (pedantic) | |
8751 | failure = 3; | |
8752 | maxindex = integer_minus_one_node; | |
8753 | } | |
8754 | else | |
8755 | { | |
8756 | tree curindex; | |
c75b4594 | 8757 | unsigned HOST_WIDE_INT cnt; |
8758 | constructor_elt *ce; | |
cee43f7e | 8759 | bool fold_p = false; |
c271bdb2 | 8760 | |
c75b4594 | 8761 | if (VEC_index (constructor_elt, v, 0)->index) |
389dd41b | 8762 | maxindex = fold_convert_loc (input_location, sizetype, |
8763 | VEC_index (constructor_elt, | |
8764 | v, 0)->index); | |
c271bdb2 | 8765 | curindex = maxindex; |
8766 | ||
c75b4594 | 8767 | for (cnt = 1; |
8768 | VEC_iterate (constructor_elt, v, cnt, ce); | |
8769 | cnt++) | |
c271bdb2 | 8770 | { |
cee43f7e | 8771 | bool curfold_p = false; |
c75b4594 | 8772 | if (ce->index) |
cee43f7e | 8773 | curindex = ce->index, curfold_p = true; |
c271bdb2 | 8774 | else |
cee43f7e | 8775 | { |
8776 | if (fold_p) | |
8777 | curindex = fold_convert (sizetype, curindex); | |
389dd41b | 8778 | curindex = size_binop (PLUS_EXPR, curindex, |
8779 | size_one_node); | |
cee43f7e | 8780 | } |
c271bdb2 | 8781 | if (tree_int_cst_lt (maxindex, curindex)) |
cee43f7e | 8782 | maxindex = curindex, fold_p = curfold_p; |
c271bdb2 | 8783 | } |
cee43f7e | 8784 | if (fold_p) |
8785 | maxindex = fold_convert (sizetype, maxindex); | |
c271bdb2 | 8786 | } |
8787 | } | |
8788 | else | |
8789 | { | |
8790 | /* Make an error message unless that happened already. */ | |
8791 | if (initial_value != error_mark_node) | |
8792 | failure = 1; | |
8793 | } | |
8794 | } | |
8795 | else | |
8796 | { | |
8797 | failure = 2; | |
8798 | if (!do_default) | |
8799 | return failure; | |
8800 | } | |
8801 | ||
8802 | type = *ptype; | |
8803 | elt = TREE_TYPE (type); | |
8804 | quals = TYPE_QUALS (strip_array_types (elt)); | |
8805 | if (quals == 0) | |
8806 | unqual_elt = elt; | |
8807 | else | |
6d5d708e | 8808 | unqual_elt = c_build_qualified_type (elt, KEEP_QUAL_ADDR_SPACE (quals)); |
c271bdb2 | 8809 | |
8810 | /* Using build_distinct_type_copy and modifying things afterward instead | |
8811 | of using build_array_type to create a new type preserves all of the | |
8812 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
8813 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
8814 | TREE_TYPE (main_type) = unqual_elt; | |
8815 | TYPE_DOMAIN (main_type) = build_index_type (maxindex); | |
8816 | layout_type (main_type); | |
8817 | ||
6753bca0 | 8818 | /* Make sure we have the canonical MAIN_TYPE. */ |
8819 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
48e1416a | 8820 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), |
6753bca0 | 8821 | hashcode); |
8822 | main_type = type_hash_canon (hashcode, main_type); | |
8823 | ||
796735dc | 8824 | /* Fix the canonical type. */ |
8825 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
8826 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
8827 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
8828 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
8829 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
8830 | != TYPE_DOMAIN (main_type))) | |
48e1416a | 8831 | TYPE_CANONICAL (main_type) |
796735dc | 8832 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), |
8833 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
8834 | else | |
8835 | TYPE_CANONICAL (main_type) = main_type; | |
8836 | ||
c271bdb2 | 8837 | if (quals == 0) |
8838 | type = main_type; | |
8839 | else | |
8840 | type = c_build_qualified_type (main_type, quals); | |
8841 | ||
4f5b8f2a | 8842 | if (COMPLETE_TYPE_P (type) |
8843 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
8844 | && TREE_OVERFLOW (TYPE_SIZE_UNIT (type))) | |
8845 | { | |
8846 | error ("size of array is too large"); | |
8847 | /* If we proceed with the array type as it is, we'll eventually | |
8848 | crash in tree_low_cst(). */ | |
8849 | type = error_mark_node; | |
8850 | } | |
8851 | ||
c271bdb2 | 8852 | *ptype = type; |
8853 | return failure; | |
8854 | } | |
ab6bb714 | 8855 | |
93426222 | 8856 | /* Like c_mark_addressable but don't check register qualifier. */ |
8857 | void | |
8858 | c_common_mark_addressable_vec (tree t) | |
8859 | { | |
8860 | while (handled_component_p (t)) | |
8861 | t = TREE_OPERAND (t, 0); | |
8862 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
8863 | return; | |
8864 | TREE_ADDRESSABLE (t) = 1; | |
8865 | } | |
8866 | ||
8867 | ||
b6a5fc45 | 8868 | \f |
8869 | /* Used to help initialize the builtin-types.def table. When a type of | |
8870 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
8871 | The later results in segfaults even when a decl using the type doesn't | |
8872 | get invoked. */ | |
8873 | ||
8874 | tree | |
8875 | builtin_type_for_size (int size, bool unsignedp) | |
8876 | { | |
8877 | tree type = lang_hooks.types.type_for_size (size, unsignedp); | |
8878 | return type ? type : error_mark_node; | |
8879 | } | |
8880 | ||
8881 | /* A helper function for resolve_overloaded_builtin in resolving the | |
8882 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
8883 | first operand of PARAMS is a pointer to a supported data type. | |
8884 | Returns 0 if an error is encountered. */ | |
8885 | ||
8886 | static int | |
b9c74b4d | 8887 | sync_resolve_size (tree function, VEC(tree,gc) *params) |
b6a5fc45 | 8888 | { |
8889 | tree type; | |
8890 | int size; | |
8891 | ||
b9c74b4d | 8892 | if (VEC_empty (tree, params)) |
b6a5fc45 | 8893 | { |
8894 | error ("too few arguments to function %qE", function); | |
8895 | return 0; | |
8896 | } | |
8897 | ||
b9c74b4d | 8898 | type = TREE_TYPE (VEC_index (tree, params, 0)); |
b6a5fc45 | 8899 | if (TREE_CODE (type) != POINTER_TYPE) |
8900 | goto incompatible; | |
8901 | ||
8902 | type = TREE_TYPE (type); | |
8903 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
8904 | goto incompatible; | |
8905 | ||
8906 | size = tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
27213ba3 | 8907 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
b6a5fc45 | 8908 | return size; |
8909 | ||
8910 | incompatible: | |
8911 | error ("incompatible type for argument %d of %qE", 1, function); | |
8912 | return 0; | |
8913 | } | |
8914 | ||
a0c938f0 | 8915 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
b6a5fc45 | 8916 | PARAMS to make arguments match up with those of FUNCTION. Drops |
8917 | the variadic arguments at the end. Returns false if some error | |
8918 | was encountered; true on success. */ | |
8919 | ||
8920 | static bool | |
b9c74b4d | 8921 | sync_resolve_params (tree orig_function, tree function, VEC(tree, gc) *params) |
b6a5fc45 | 8922 | { |
8923 | tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); | |
8924 | tree ptype; | |
b9c74b4d | 8925 | unsigned int parmnum; |
b6a5fc45 | 8926 | |
8927 | /* We've declared the implementation functions to use "volatile void *" | |
8928 | as the pointer parameter, so we shouldn't get any complaints from the | |
8929 | call to check_function_arguments what ever type the user used. */ | |
8930 | arg_types = TREE_CHAIN (arg_types); | |
b9c74b4d | 8931 | ptype = TREE_TYPE (TREE_TYPE (VEC_index (tree, params, 0))); |
b6a5fc45 | 8932 | |
8933 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
8934 | don't get warnings for passing pointer types, etc. */ | |
b9c74b4d | 8935 | parmnum = 0; |
b6a5fc45 | 8936 | while (arg_types != void_list_node) |
8937 | { | |
8938 | tree val; | |
8939 | ||
b9c74b4d | 8940 | ++parmnum; |
8941 | if (VEC_length (tree, params) <= parmnum) | |
b6a5fc45 | 8942 | { |
8943 | error ("too few arguments to function %qE", orig_function); | |
8944 | return false; | |
8945 | } | |
8946 | ||
8947 | /* ??? Ideally for the first conversion we'd use convert_for_assignment | |
8948 | so that we get warnings for anything that doesn't match the pointer | |
8949 | type. This isn't portable across the C and C++ front ends atm. */ | |
b9c74b4d | 8950 | val = VEC_index (tree, params, parmnum); |
b6a5fc45 | 8951 | val = convert (ptype, val); |
8952 | val = convert (TREE_VALUE (arg_types), val); | |
b9c74b4d | 8953 | VEC_replace (tree, params, parmnum, val); |
b6a5fc45 | 8954 | |
8955 | arg_types = TREE_CHAIN (arg_types); | |
b6a5fc45 | 8956 | } |
8957 | ||
8958 | /* The definition of these primitives is variadic, with the remaining | |
8959 | being "an optional list of variables protected by the memory barrier". | |
8960 | No clue what that's supposed to mean, precisely, but we consider all | |
8961 | call-clobbered variables to be protected so we're safe. */ | |
b9c74b4d | 8962 | VEC_truncate (tree, params, parmnum + 1); |
b6a5fc45 | 8963 | |
8964 | return true; | |
8965 | } | |
8966 | ||
a0c938f0 | 8967 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
b6a5fc45 | 8968 | RESULT to make it match the type of the first pointer argument in |
8969 | PARAMS. */ | |
8970 | ||
8971 | static tree | |
b9c74b4d | 8972 | sync_resolve_return (tree first_param, tree result) |
b6a5fc45 | 8973 | { |
b9c74b4d | 8974 | tree ptype = TREE_TYPE (TREE_TYPE (first_param)); |
10080eac | 8975 | ptype = TYPE_MAIN_VARIANT (ptype); |
b6a5fc45 | 8976 | return convert (ptype, result); |
8977 | } | |
8978 | ||
8979 | /* Some builtin functions are placeholders for other expressions. This | |
8980 | function should be called immediately after parsing the call expression | |
8981 | before surrounding code has committed to the type of the expression. | |
8982 | ||
e60a6f7b | 8983 | LOC is the location of the builtin call. |
8984 | ||
b6a5fc45 | 8985 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. |
8986 | PARAMS is the argument list for the call. The return value is non-null | |
8987 | when expansion is complete, and null if normal processing should | |
8988 | continue. */ | |
8989 | ||
8990 | tree | |
e60a6f7b | 8991 | resolve_overloaded_builtin (location_t loc, tree function, VEC(tree,gc) *params) |
b6a5fc45 | 8992 | { |
8993 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
65441f6f | 8994 | switch (DECL_BUILT_IN_CLASS (function)) |
8995 | { | |
8996 | case BUILT_IN_NORMAL: | |
8997 | break; | |
8998 | case BUILT_IN_MD: | |
8999 | if (targetm.resolve_overloaded_builtin) | |
e60a6f7b | 9000 | return targetm.resolve_overloaded_builtin (loc, function, params); |
65441f6f | 9001 | else |
a0c938f0 | 9002 | return NULL_TREE; |
65441f6f | 9003 | default: |
9004 | return NULL_TREE; | |
9005 | } | |
a0c938f0 | 9006 | |
65441f6f | 9007 | /* Handle BUILT_IN_NORMAL here. */ |
b6a5fc45 | 9008 | switch (orig_code) |
9009 | { | |
9010 | case BUILT_IN_FETCH_AND_ADD_N: | |
9011 | case BUILT_IN_FETCH_AND_SUB_N: | |
9012 | case BUILT_IN_FETCH_AND_OR_N: | |
9013 | case BUILT_IN_FETCH_AND_AND_N: | |
9014 | case BUILT_IN_FETCH_AND_XOR_N: | |
9015 | case BUILT_IN_FETCH_AND_NAND_N: | |
9016 | case BUILT_IN_ADD_AND_FETCH_N: | |
9017 | case BUILT_IN_SUB_AND_FETCH_N: | |
9018 | case BUILT_IN_OR_AND_FETCH_N: | |
9019 | case BUILT_IN_AND_AND_FETCH_N: | |
9020 | case BUILT_IN_XOR_AND_FETCH_N: | |
9021 | case BUILT_IN_NAND_AND_FETCH_N: | |
9022 | case BUILT_IN_BOOL_COMPARE_AND_SWAP_N: | |
9023 | case BUILT_IN_VAL_COMPARE_AND_SWAP_N: | |
9024 | case BUILT_IN_LOCK_TEST_AND_SET_N: | |
9025 | case BUILT_IN_LOCK_RELEASE_N: | |
9026 | { | |
9027 | int n = sync_resolve_size (function, params); | |
b9c74b4d | 9028 | tree new_function, first_param, result; |
b6a5fc45 | 9029 | |
9030 | if (n == 0) | |
9031 | return error_mark_node; | |
9032 | ||
9033 | new_function = built_in_decls[orig_code + exact_log2 (n) + 1]; | |
9034 | if (!sync_resolve_params (function, new_function, params)) | |
9035 | return error_mark_node; | |
9036 | ||
b9c74b4d | 9037 | first_param = VEC_index (tree, params, 0); |
e60a6f7b | 9038 | result = build_function_call_vec (loc, new_function, params, NULL); |
b6a5fc45 | 9039 | if (orig_code != BUILT_IN_BOOL_COMPARE_AND_SWAP_N |
9040 | && orig_code != BUILT_IN_LOCK_RELEASE_N) | |
b9c74b4d | 9041 | result = sync_resolve_return (first_param, result); |
b6a5fc45 | 9042 | |
9043 | return result; | |
9044 | } | |
9045 | ||
9046 | default: | |
65441f6f | 9047 | return NULL_TREE; |
b6a5fc45 | 9048 | } |
9049 | } | |
9050 | ||
491255f5 | 9051 | /* Ignoring their sign, return true if two scalar types are the same. */ |
9052 | bool | |
9053 | same_scalar_type_ignoring_signedness (tree t1, tree t2) | |
9054 | { | |
9055 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); | |
9056 | ||
9421ebb9 | 9057 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
9058 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
9059 | || c2 == FIXED_POINT_TYPE)); | |
491255f5 | 9060 | |
9061 | /* Equality works here because c_common_signed_type uses | |
9062 | TYPE_MAIN_VARIANT. */ | |
11773141 | 9063 | return c_common_signed_type (t1) |
9064 | == c_common_signed_type (t2); | |
491255f5 | 9065 | } |
9066 | ||
be7350e7 | 9067 | /* Check for missing format attributes on function pointers. LTYPE is |
9068 | the new type or left-hand side type. RTYPE is the old type or | |
9069 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
9070 | attribute. */ | |
9071 | ||
9072 | bool | |
9073 | check_missing_format_attribute (tree ltype, tree rtype) | |
9074 | { | |
9075 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
9076 | tree ra; | |
9077 | ||
9078 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
9079 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
9080 | break; | |
9081 | if (ra) | |
9082 | { | |
9083 | tree la; | |
9084 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
9085 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
9086 | break; | |
9087 | return !la; | |
9088 | } | |
9089 | else | |
9090 | return false; | |
9091 | } | |
9092 | ||
2840aae4 | 9093 | /* Subscripting with type char is likely to lose on a machine where |
9094 | chars are signed. So warn on any machine, but optionally. Don't | |
9095 | warn for unsigned char since that type is safe. Don't warn for | |
9096 | signed char because anyone who uses that must have done so | |
9097 | deliberately. Furthermore, we reduce the false positive load by | |
9098 | warning only for non-constant value of type char. */ | |
9099 | ||
9100 | void | |
9101 | warn_array_subscript_with_type_char (tree index) | |
9102 | { | |
9103 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
9104 | && TREE_CODE (index) != INTEGER_CST) | |
9105 | warning (OPT_Wchar_subscripts, "array subscript has type %<char%>"); | |
9106 | } | |
9107 | ||
e534436e | 9108 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
9109 | cover cases like x + y << z which readers are likely to | |
9110 | misinterpret. We have seen an expression in which CODE is a binary | |
82012ffe | 9111 | operator used to combine expressions ARG_LEFT and ARG_RIGHT, which |
9112 | before folding had CODE_LEFT and CODE_RIGHT. CODE_LEFT and | |
9113 | CODE_RIGHT may be ERROR_MARK, which means that that side of the | |
9114 | expression was not formed using a binary or unary operator, or it | |
9115 | was enclosed in parentheses. */ | |
e534436e | 9116 | |
9117 | void | |
82012ffe | 9118 | warn_about_parentheses (enum tree_code code, |
269f7979 | 9119 | enum tree_code code_left, tree arg_left, |
82012ffe | 9120 | enum tree_code code_right, tree arg_right) |
e534436e | 9121 | { |
9122 | if (!warn_parentheses) | |
9123 | return; | |
9124 | ||
82012ffe | 9125 | /* This macro tests that the expression ARG with original tree code |
9126 | CODE appears to be a boolean expression. or the result of folding a | |
9127 | boolean expression. */ | |
9128 | #define APPEARS_TO_BE_BOOLEAN_EXPR_P(CODE, ARG) \ | |
9129 | (truth_value_p (TREE_CODE (ARG)) \ | |
9130 | || TREE_CODE (TREE_TYPE (ARG)) == BOOLEAN_TYPE \ | |
9131 | /* Folding may create 0 or 1 integers from other expressions. */ \ | |
9132 | || ((CODE) != INTEGER_CST \ | |
9133 | && (integer_onep (ARG) || integer_zerop (ARG)))) | |
9134 | ||
48e1416a | 9135 | switch (code) |
e534436e | 9136 | { |
82012ffe | 9137 | case LSHIFT_EXPR: |
9138 | if (code_left == PLUS_EXPR || code_right == PLUS_EXPR) | |
e534436e | 9139 | warning (OPT_Wparentheses, |
82012ffe | 9140 | "suggest parentheses around %<+%> inside %<<<%>"); |
9141 | else if (code_left == MINUS_EXPR || code_right == MINUS_EXPR) | |
9142 | warning (OPT_Wparentheses, | |
9143 | "suggest parentheses around %<-%> inside %<<<%>"); | |
9144 | return; | |
e534436e | 9145 | |
82012ffe | 9146 | case RSHIFT_EXPR: |
9147 | if (code_left == PLUS_EXPR || code_right == PLUS_EXPR) | |
e534436e | 9148 | warning (OPT_Wparentheses, |
82012ffe | 9149 | "suggest parentheses around %<+%> inside %<>>%>"); |
9150 | else if (code_left == MINUS_EXPR || code_right == MINUS_EXPR) | |
9151 | warning (OPT_Wparentheses, | |
9152 | "suggest parentheses around %<-%> inside %<>>%>"); | |
9153 | return; | |
e534436e | 9154 | |
82012ffe | 9155 | case TRUTH_ORIF_EXPR: |
9156 | if (code_left == TRUTH_ANDIF_EXPR || code_right == TRUTH_ANDIF_EXPR) | |
9157 | warning (OPT_Wparentheses, | |
9158 | "suggest parentheses around %<&&%> within %<||%>"); | |
9159 | return; | |
9160 | ||
9161 | case BIT_IOR_EXPR: | |
e534436e | 9162 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR |
9163 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
9164 | || code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
9165 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
9166 | warning (OPT_Wparentheses, | |
82012ffe | 9167 | "suggest parentheses around arithmetic in operand of %<|%>"); |
e534436e | 9168 | /* Check cases like x|y==z */ |
82012ffe | 9169 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison |
9170 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
e534436e | 9171 | warning (OPT_Wparentheses, |
82012ffe | 9172 | "suggest parentheses around comparison in operand of %<|%>"); |
9173 | /* Check cases like !x | y */ | |
9174 | else if (code_left == TRUTH_NOT_EXPR | |
9175 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
96bda40f | 9176 | warning (OPT_Wparentheses, "suggest parentheses around operand of " |
82012ffe | 9177 | "%<!%> or change %<|%> to %<||%> or %<!%> to %<~%>"); |
9178 | return; | |
e534436e | 9179 | |
82012ffe | 9180 | case BIT_XOR_EXPR: |
e534436e | 9181 | if (code_left == BIT_AND_EXPR |
9182 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
9183 | || code_right == BIT_AND_EXPR | |
9184 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
9185 | warning (OPT_Wparentheses, | |
82012ffe | 9186 | "suggest parentheses around arithmetic in operand of %<^%>"); |
e534436e | 9187 | /* Check cases like x^y==z */ |
82012ffe | 9188 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison |
9189 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
e534436e | 9190 | warning (OPT_Wparentheses, |
82012ffe | 9191 | "suggest parentheses around comparison in operand of %<^%>"); |
9192 | return; | |
e534436e | 9193 | |
82012ffe | 9194 | case BIT_AND_EXPR: |
9195 | if (code_left == PLUS_EXPR || code_right == PLUS_EXPR) | |
9196 | warning (OPT_Wparentheses, | |
9197 | "suggest parentheses around %<+%> in operand of %<&%>"); | |
9198 | else if (code_left == MINUS_EXPR || code_right == MINUS_EXPR) | |
e534436e | 9199 | warning (OPT_Wparentheses, |
82012ffe | 9200 | "suggest parentheses around %<-%> in operand of %<&%>"); |
e534436e | 9201 | /* Check cases like x&y==z */ |
82012ffe | 9202 | else if (TREE_CODE_CLASS (code_left) == tcc_comparison |
9203 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
e534436e | 9204 | warning (OPT_Wparentheses, |
82012ffe | 9205 | "suggest parentheses around comparison in operand of %<&%>"); |
9206 | /* Check cases like !x & y */ | |
9207 | else if (code_left == TRUTH_NOT_EXPR | |
9208 | && !APPEARS_TO_BE_BOOLEAN_EXPR_P (code_right, arg_right)) | |
96bda40f | 9209 | warning (OPT_Wparentheses, "suggest parentheses around operand of " |
82012ffe | 9210 | "%<!%> or change %<&%> to %<&&%> or %<!%> to %<~%>"); |
9211 | return; | |
e534436e | 9212 | |
82012ffe | 9213 | case EQ_EXPR: |
6ce0c450 | 9214 | if (TREE_CODE_CLASS (code_left) == tcc_comparison |
9215 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
9216 | warning (OPT_Wparentheses, | |
82012ffe | 9217 | "suggest parentheses around comparison in operand of %<==%>"); |
9218 | return; | |
9219 | case NE_EXPR: | |
9220 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
9221 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
9222 | warning (OPT_Wparentheses, | |
9223 | "suggest parentheses around comparison in operand of %<!=%>"); | |
9224 | return; | |
9225 | ||
9226 | default: | |
9227 | if (TREE_CODE_CLASS (code) == tcc_comparison | |
9228 | && ((TREE_CODE_CLASS (code_left) == tcc_comparison | |
269f7979 | 9229 | && code_left != NE_EXPR && code_left != EQ_EXPR |
9230 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_left))) | |
82012ffe | 9231 | || (TREE_CODE_CLASS (code_right) == tcc_comparison |
269f7979 | 9232 | && code_right != NE_EXPR && code_right != EQ_EXPR |
9233 | && INTEGRAL_TYPE_P (TREE_TYPE (arg_right))))) | |
82012ffe | 9234 | warning (OPT_Wparentheses, "comparisons like %<X<=Y<=Z%> do not " |
6ce0c450 | 9235 | "have their mathematical meaning"); |
82012ffe | 9236 | return; |
6ce0c450 | 9237 | } |
82012ffe | 9238 | #undef NOT_A_BOOLEAN_EXPR_P |
e534436e | 9239 | } |
9240 | ||
92fccaaa | 9241 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
9242 | ||
9243 | void | |
9244 | warn_for_unused_label (tree label) | |
9245 | { | |
9246 | if (!TREE_USED (label)) | |
9247 | { | |
9248 | if (DECL_INITIAL (label)) | |
9249 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
9250 | else | |
9251 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
9252 | } | |
9253 | } | |
2840aae4 | 9254 | |
b9fc964a | 9255 | #ifndef TARGET_HAS_TARGETCM |
9256 | struct gcc_targetcm targetcm = TARGETCM_INITIALIZER; | |
9257 | #endif | |
9258 | ||
b6889cb0 | 9259 | /* Warn for division by zero according to the value of DIVISOR. LOC |
9260 | is the location of the division operator. */ | |
f092582b | 9261 | |
9262 | void | |
b6889cb0 | 9263 | warn_for_div_by_zero (location_t loc, tree divisor) |
f092582b | 9264 | { |
9421ebb9 | 9265 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
9266 | about division by zero. Do not issue a warning if DIVISOR has a | |
f092582b | 9267 | floating-point type, since we consider 0.0/0.0 a valid way of |
9268 | generating a NaN. */ | |
48d94ede | 9269 | if (c_inhibit_evaluation_warnings == 0 |
9421ebb9 | 9270 | && (integer_zerop (divisor) || fixed_zerop (divisor))) |
b6889cb0 | 9271 | warning_at (loc, OPT_Wdiv_by_zero, "division by zero"); |
f092582b | 9272 | } |
9273 | ||
13869a99 | 9274 | /* Subroutine of build_binary_op. Give warnings for comparisons |
9275 | between signed and unsigned quantities that may fail. Do the | |
9276 | checking based on the original operand trees ORIG_OP0 and ORIG_OP1, | |
9277 | so that casts will be considered, but default promotions won't | |
8e70fb09 | 9278 | be. |
9279 | ||
9280 | LOCATION is the location of the comparison operator. | |
13869a99 | 9281 | |
9282 | The arguments of this function map directly to local variables | |
9283 | of build_binary_op. */ | |
9284 | ||
48e1416a | 9285 | void |
8e70fb09 | 9286 | warn_for_sign_compare (location_t location, |
48e1416a | 9287 | tree orig_op0, tree orig_op1, |
9288 | tree op0, tree op1, | |
13869a99 | 9289 | tree result_type, enum tree_code resultcode) |
9290 | { | |
9291 | int op0_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op0)); | |
9292 | int op1_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op1)); | |
9293 | int unsignedp0, unsignedp1; | |
48e1416a | 9294 | |
13869a99 | 9295 | /* In C++, check for comparison of different enum types. */ |
9296 | if (c_dialect_cxx() | |
9297 | && TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE | |
9298 | && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE | |
9299 | && TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0)) | |
895b662f | 9300 | != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1))) |
13869a99 | 9301 | { |
8e70fb09 | 9302 | warning_at (location, |
9303 | OPT_Wsign_compare, "comparison between types %qT and %qT", | |
9304 | TREE_TYPE (orig_op0), TREE_TYPE (orig_op1)); | |
13869a99 | 9305 | } |
9306 | ||
9307 | /* Do not warn if the comparison is being done in a signed type, | |
9308 | since the signed type will only be chosen if it can represent | |
9309 | all the values of the unsigned type. */ | |
9310 | if (!TYPE_UNSIGNED (result_type)) | |
9311 | /* OK */; | |
9312 | /* Do not warn if both operands are unsigned. */ | |
9313 | else if (op0_signed == op1_signed) | |
9314 | /* OK */; | |
9315 | else | |
9316 | { | |
895b662f | 9317 | tree sop, uop, base_type; |
13869a99 | 9318 | bool ovf; |
895b662f | 9319 | |
13869a99 | 9320 | if (op0_signed) |
9321 | sop = orig_op0, uop = orig_op1; | |
48e1416a | 9322 | else |
13869a99 | 9323 | sop = orig_op1, uop = orig_op0; |
9324 | ||
48e1416a | 9325 | STRIP_TYPE_NOPS (sop); |
13869a99 | 9326 | STRIP_TYPE_NOPS (uop); |
895b662f | 9327 | base_type = (TREE_CODE (result_type) == COMPLEX_TYPE |
9328 | ? TREE_TYPE (result_type) : result_type); | |
13869a99 | 9329 | |
9330 | /* Do not warn if the signed quantity is an unsuffixed integer | |
9331 | literal (or some static constant expression involving such | |
9332 | literals or a conditional expression involving such literals) | |
9333 | and it is non-negative. */ | |
9334 | if (tree_expr_nonnegative_warnv_p (sop, &ovf)) | |
9335 | /* OK */; | |
9336 | /* Do not warn if the comparison is an equality operation, the | |
9337 | unsigned quantity is an integral constant, and it would fit | |
9338 | in the result if the result were signed. */ | |
9339 | else if (TREE_CODE (uop) == INTEGER_CST | |
9340 | && (resultcode == EQ_EXPR || resultcode == NE_EXPR) | |
895b662f | 9341 | && int_fits_type_p (uop, c_common_signed_type (base_type))) |
13869a99 | 9342 | /* OK */; |
9343 | /* In C, do not warn if the unsigned quantity is an enumeration | |
9344 | constant and its maximum value would fit in the result if the | |
9345 | result were signed. */ | |
9346 | else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST | |
9347 | && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE | |
9348 | && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)), | |
895b662f | 9349 | c_common_signed_type (base_type))) |
13869a99 | 9350 | /* OK */; |
48e1416a | 9351 | else |
8e70fb09 | 9352 | warning_at (location, |
48e1416a | 9353 | OPT_Wsign_compare, |
8e70fb09 | 9354 | "comparison between signed and unsigned integer expressions"); |
13869a99 | 9355 | } |
48e1416a | 9356 | |
13869a99 | 9357 | /* Warn if two unsigned values are being compared in a size larger |
9358 | than their original size, and one (and only one) is the result of | |
9359 | a `~' operator. This comparison will always fail. | |
48e1416a | 9360 | |
13869a99 | 9361 | Also warn if one operand is a constant, and the constant does not |
9362 | have all bits set that are set in the ~ operand when it is | |
9363 | extended. */ | |
9364 | ||
9365 | op0 = get_narrower (op0, &unsignedp0); | |
9366 | op1 = get_narrower (op1, &unsignedp1); | |
48e1416a | 9367 | |
13869a99 | 9368 | if ((TREE_CODE (op0) == BIT_NOT_EXPR) |
9369 | ^ (TREE_CODE (op1) == BIT_NOT_EXPR)) | |
9370 | { | |
9371 | if (TREE_CODE (op0) == BIT_NOT_EXPR) | |
9372 | op0 = get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); | |
9373 | if (TREE_CODE (op1) == BIT_NOT_EXPR) | |
9374 | op1 = get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); | |
9375 | ||
9376 | if (host_integerp (op0, 0) || host_integerp (op1, 0)) | |
9377 | { | |
9378 | tree primop; | |
9379 | HOST_WIDE_INT constant, mask; | |
9380 | int unsignedp; | |
9381 | unsigned int bits; | |
48e1416a | 9382 | |
13869a99 | 9383 | if (host_integerp (op0, 0)) |
9384 | { | |
9385 | primop = op1; | |
9386 | unsignedp = unsignedp1; | |
9387 | constant = tree_low_cst (op0, 0); | |
9388 | } | |
9389 | else | |
9390 | { | |
9391 | primop = op0; | |
9392 | unsignedp = unsignedp0; | |
9393 | constant = tree_low_cst (op1, 0); | |
9394 | } | |
48e1416a | 9395 | |
13869a99 | 9396 | bits = TYPE_PRECISION (TREE_TYPE (primop)); |
9397 | if (bits < TYPE_PRECISION (result_type) | |
9398 | && bits < HOST_BITS_PER_LONG && unsignedp) | |
9399 | { | |
9400 | mask = (~ (HOST_WIDE_INT) 0) << bits; | |
9401 | if ((mask & constant) != mask) | |
9402 | { | |
9403 | if (constant == 0) | |
48e1416a | 9404 | warning (OPT_Wsign_compare, |
13869a99 | 9405 | "promoted ~unsigned is always non-zero"); |
9406 | else | |
48e1416a | 9407 | warning_at (location, OPT_Wsign_compare, |
8e70fb09 | 9408 | "comparison of promoted ~unsigned with constant"); |
13869a99 | 9409 | } |
9410 | } | |
9411 | } | |
9412 | else if (unsignedp0 && unsignedp1 | |
9413 | && (TYPE_PRECISION (TREE_TYPE (op0)) | |
9414 | < TYPE_PRECISION (result_type)) | |
9415 | && (TYPE_PRECISION (TREE_TYPE (op1)) | |
9416 | < TYPE_PRECISION (result_type))) | |
8e70fb09 | 9417 | warning_at (location, OPT_Wsign_compare, |
13869a99 | 9418 | "comparison of promoted ~unsigned with unsigned"); |
9419 | } | |
9420 | } | |
9421 | ||
5ba33bf4 | 9422 | /* RESULT_TYPE is the result of converting TYPE1 and TYPE2 to a common |
9423 | type via c_common_type. If -Wdouble-promotion is in use, and the | |
9424 | conditions for warning have been met, issue a warning. GMSGID is | |
9425 | the warning message. It must have two %T specifiers for the type | |
9426 | that was converted (generally "float") and the type to which it was | |
9427 | converted (generally "double), respectively. LOC is the location | |
9428 | to which the awrning should refer. */ | |
9429 | ||
9430 | void | |
9431 | do_warn_double_promotion (tree result_type, tree type1, tree type2, | |
9432 | const char *gmsgid, location_t loc) | |
9433 | { | |
9434 | tree source_type; | |
9435 | ||
9436 | if (!warn_double_promotion) | |
9437 | return; | |
9438 | /* If the conversion will not occur at run-time, there is no need to | |
9439 | warn about it. */ | |
9440 | if (c_inhibit_evaluation_warnings) | |
9441 | return; | |
9442 | if (TYPE_MAIN_VARIANT (result_type) != double_type_node | |
9443 | && TYPE_MAIN_VARIANT (result_type) != complex_double_type_node) | |
9444 | return; | |
9445 | if (TYPE_MAIN_VARIANT (type1) == float_type_node | |
9446 | || TYPE_MAIN_VARIANT (type1) == complex_float_type_node) | |
9447 | source_type = type1; | |
9448 | else if (TYPE_MAIN_VARIANT (type2) == float_type_node | |
9449 | || TYPE_MAIN_VARIANT (type2) == complex_float_type_node) | |
9450 | source_type = type2; | |
9451 | else | |
9452 | return; | |
9453 | warning_at (loc, OPT_Wdouble_promotion, gmsgid, source_type, result_type); | |
9454 | } | |
9455 | ||
41771881 | 9456 | /* Setup a TYPE_DECL node as a typedef representation. |
9457 | ||
9458 | X is a TYPE_DECL for a typedef statement. Create a brand new | |
9459 | ..._TYPE node (which will be just a variant of the existing | |
9460 | ..._TYPE node with identical properties) and then install X | |
9461 | as the TYPE_NAME of this brand new (duplicate) ..._TYPE node. | |
9462 | ||
9463 | The whole point here is to end up with a situation where each | |
9464 | and every ..._TYPE node the compiler creates will be uniquely | |
9465 | associated with AT MOST one node representing a typedef name. | |
9466 | This way, even though the compiler substitutes corresponding | |
9467 | ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very | |
9468 | early on, later parts of the compiler can always do the reverse | |
9469 | translation and get back the corresponding typedef name. For | |
9470 | example, given: | |
9471 | ||
9472 | typedef struct S MY_TYPE; | |
9473 | MY_TYPE object; | |
9474 | ||
9475 | Later parts of the compiler might only know that `object' was of | |
9476 | type `struct S' if it were not for code just below. With this | |
9477 | code however, later parts of the compiler see something like: | |
9478 | ||
9479 | struct S' == struct S | |
9480 | typedef struct S' MY_TYPE; | |
9481 | struct S' object; | |
9482 | ||
9483 | And they can then deduce (from the node for type struct S') that | |
9484 | the original object declaration was: | |
9485 | ||
9486 | MY_TYPE object; | |
9487 | ||
9488 | Being able to do this is important for proper support of protoize, | |
9489 | and also for generating precise symbolic debugging information | |
9490 | which takes full account of the programmer's (typedef) vocabulary. | |
9491 | ||
9492 | Obviously, we don't want to generate a duplicate ..._TYPE node if | |
9493 | the TYPE_DECL node that we are now processing really represents a | |
9494 | standard built-in type. */ | |
9495 | ||
9496 | void | |
9497 | set_underlying_type (tree x) | |
9498 | { | |
9499 | if (x == error_mark_node) | |
9500 | return; | |
9501 | if (DECL_IS_BUILTIN (x)) | |
9502 | { | |
9503 | if (TYPE_NAME (TREE_TYPE (x)) == 0) | |
9504 | TYPE_NAME (TREE_TYPE (x)) = x; | |
9505 | } | |
9506 | else if (TREE_TYPE (x) != error_mark_node | |
9507 | && DECL_ORIGINAL_TYPE (x) == NULL_TREE) | |
9508 | { | |
9509 | tree tt = TREE_TYPE (x); | |
9510 | DECL_ORIGINAL_TYPE (x) = tt; | |
9511 | tt = build_variant_type_copy (tt); | |
9512 | TYPE_STUB_DECL (tt) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x)); | |
9513 | TYPE_NAME (tt) = x; | |
9514 | TREE_USED (tt) = TREE_USED (x); | |
9515 | TREE_TYPE (x) = tt; | |
9516 | } | |
9517 | } | |
9518 | ||
1a4c44c5 | 9519 | /* Record the types used by the current global variable declaration |
9520 | being parsed, so that we can decide later to emit their debug info. | |
9521 | Those types are in types_used_by_cur_var_decl, and we are going to | |
9522 | store them in the types_used_by_vars_hash hash table. | |
9523 | DECL is the declaration of the global variable that has been parsed. */ | |
9524 | ||
9525 | void | |
9526 | record_types_used_by_current_var_decl (tree decl) | |
9527 | { | |
9528 | gcc_assert (decl && DECL_P (decl) && TREE_STATIC (decl)); | |
9529 | ||
aef48c9a | 9530 | while (!VEC_empty (tree, types_used_by_cur_var_decl)) |
1a4c44c5 | 9531 | { |
aef48c9a | 9532 | tree type = VEC_pop (tree, types_used_by_cur_var_decl); |
9533 | types_used_by_var_decl_insert (type, decl); | |
1a4c44c5 | 9534 | } |
9535 | } | |
9536 | ||
f352a3fb | 9537 | /* The C and C++ parsers both use vectors to hold function arguments. |
9538 | For efficiency, we keep a cache of unused vectors. This is the | |
9539 | cache. */ | |
9540 | ||
9541 | typedef VEC(tree,gc)* tree_gc_vec; | |
9542 | DEF_VEC_P(tree_gc_vec); | |
9543 | DEF_VEC_ALLOC_P(tree_gc_vec,gc); | |
9544 | static GTY((deletable)) VEC(tree_gc_vec,gc) *tree_vector_cache; | |
9545 | ||
9546 | /* Return a new vector from the cache. If the cache is empty, | |
9547 | allocate a new vector. These vectors are GC'ed, so it is OK if the | |
9548 | pointer is not released.. */ | |
9549 | ||
9550 | VEC(tree,gc) * | |
9551 | make_tree_vector (void) | |
9552 | { | |
9553 | if (!VEC_empty (tree_gc_vec, tree_vector_cache)) | |
9554 | return VEC_pop (tree_gc_vec, tree_vector_cache); | |
9555 | else | |
9556 | { | |
9557 | /* Passing 0 to VEC_alloc returns NULL, and our callers require | |
9558 | that we always return a non-NULL value. The vector code uses | |
9559 | 4 when growing a NULL vector, so we do too. */ | |
9560 | return VEC_alloc (tree, gc, 4); | |
9561 | } | |
9562 | } | |
9563 | ||
9564 | /* Release a vector of trees back to the cache. */ | |
9565 | ||
9566 | void | |
9567 | release_tree_vector (VEC(tree,gc) *vec) | |
9568 | { | |
9569 | if (vec != NULL) | |
9570 | { | |
9571 | VEC_truncate (tree, vec, 0); | |
9572 | VEC_safe_push (tree_gc_vec, gc, tree_vector_cache, vec); | |
9573 | } | |
9574 | } | |
9575 | ||
9576 | /* Get a new tree vector holding a single tree. */ | |
9577 | ||
9578 | VEC(tree,gc) * | |
9579 | make_tree_vector_single (tree t) | |
9580 | { | |
9581 | VEC(tree,gc) *ret = make_tree_vector (); | |
9582 | VEC_quick_push (tree, ret, t); | |
9583 | return ret; | |
9584 | } | |
9585 | ||
9586 | /* Get a new tree vector which is a copy of an existing one. */ | |
9587 | ||
9588 | VEC(tree,gc) * | |
9589 | make_tree_vector_copy (const VEC(tree,gc) *orig) | |
9590 | { | |
9591 | VEC(tree,gc) *ret; | |
9592 | unsigned int ix; | |
9593 | tree t; | |
9594 | ||
9595 | ret = make_tree_vector (); | |
9596 | VEC_reserve (tree, gc, ret, VEC_length (tree, orig)); | |
48148244 | 9597 | FOR_EACH_VEC_ELT (tree, orig, ix, t) |
f352a3fb | 9598 | VEC_quick_push (tree, ret, t); |
9599 | return ret; | |
9600 | } | |
9601 | ||
a9ffdd35 | 9602 | /* Return true if KEYWORD starts a type specifier. */ |
9603 | ||
9604 | bool | |
9605 | keyword_begins_type_specifier (enum rid keyword) | |
9606 | { | |
9607 | switch (keyword) | |
9608 | { | |
9609 | case RID_INT: | |
9610 | case RID_CHAR: | |
9611 | case RID_FLOAT: | |
9612 | case RID_DOUBLE: | |
9613 | case RID_VOID: | |
9614 | case RID_INT128: | |
9615 | case RID_UNSIGNED: | |
9616 | case RID_LONG: | |
9617 | case RID_SHORT: | |
9618 | case RID_SIGNED: | |
9619 | case RID_DFLOAT32: | |
9620 | case RID_DFLOAT64: | |
9621 | case RID_DFLOAT128: | |
9622 | case RID_FRACT: | |
9623 | case RID_ACCUM: | |
9624 | case RID_BOOL: | |
9625 | case RID_WCHAR: | |
9626 | case RID_CHAR16: | |
9627 | case RID_CHAR32: | |
9628 | case RID_SAT: | |
9629 | case RID_COMPLEX: | |
9630 | case RID_TYPEOF: | |
9631 | case RID_STRUCT: | |
9632 | case RID_CLASS: | |
9633 | case RID_UNION: | |
9634 | case RID_ENUM: | |
9635 | return true; | |
9636 | default: | |
9637 | return false; | |
9638 | } | |
9639 | } | |
9640 | ||
9641 | /* Return true if KEYWORD names a type qualifier. */ | |
9642 | ||
9643 | bool | |
9644 | keyword_is_type_qualifier (enum rid keyword) | |
9645 | { | |
9646 | switch (keyword) | |
9647 | { | |
9648 | case RID_CONST: | |
9649 | case RID_VOLATILE: | |
9650 | case RID_RESTRICT: | |
9651 | return true; | |
9652 | default: | |
9653 | return false; | |
9654 | } | |
9655 | } | |
9656 | ||
9657 | /* Return true if KEYWORD names a storage class specifier. | |
9658 | ||
9659 | RID_TYPEDEF is not included in this list despite `typedef' being | |
9660 | listed in C99 6.7.1.1. 6.7.1.3 indicates that `typedef' is listed as | |
9661 | such for syntactic convenience only. */ | |
9662 | ||
9663 | bool | |
9664 | keyword_is_storage_class_specifier (enum rid keyword) | |
9665 | { | |
9666 | switch (keyword) | |
9667 | { | |
9668 | case RID_STATIC: | |
9669 | case RID_EXTERN: | |
9670 | case RID_REGISTER: | |
9671 | case RID_AUTO: | |
9672 | case RID_MUTABLE: | |
9673 | case RID_THREAD: | |
9674 | return true; | |
9675 | default: | |
9676 | return false; | |
9677 | } | |
9678 | } | |
9679 | ||
fad3f658 | 9680 | /* Return true if KEYWORD names a function-specifier [dcl.fct.spec]. */ |
9681 | ||
9682 | static bool | |
9683 | keyword_is_function_specifier (enum rid keyword) | |
9684 | { | |
9685 | switch (keyword) | |
9686 | { | |
9687 | case RID_INLINE: | |
9688 | case RID_VIRTUAL: | |
9689 | case RID_EXPLICIT: | |
9690 | return true; | |
9691 | default: | |
9692 | return false; | |
9693 | } | |
9694 | } | |
9695 | ||
9696 | /* Return true if KEYWORD names a decl-specifier [dcl.spec] or a | |
9697 | declaration-specifier (C99 6.7). */ | |
9698 | ||
9699 | bool | |
9700 | keyword_is_decl_specifier (enum rid keyword) | |
9701 | { | |
9702 | if (keyword_is_storage_class_specifier (keyword) | |
9703 | || keyword_is_type_qualifier (keyword) | |
9704 | || keyword_is_function_specifier (keyword)) | |
9705 | return true; | |
9706 | ||
9707 | switch (keyword) | |
9708 | { | |
9709 | case RID_TYPEDEF: | |
9710 | case RID_FRIEND: | |
9711 | case RID_CONSTEXPR: | |
9712 | return true; | |
9713 | default: | |
9714 | return false; | |
9715 | } | |
9716 | } | |
9717 | ||
7bedc3a0 | 9718 | #include "gt-c-family-c-common.h" |