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b0fc3e72 | 1 | /* Subroutines shared by all languages that are variants of C. |
fbd26352 | 2 | Copyright (C) 1992-2019 Free Software Foundation, Inc. |
b0fc3e72 | 3 | |
f12b58b3 | 4 | This file is part of GCC. |
b0fc3e72 | 5 | |
f12b58b3 | 6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 9 | version. |
b0fc3e72 | 10 | |
f12b58b3 | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
b0fc3e72 | 15 | |
16 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
b0fc3e72 | 19 | |
b20a8bb4 | 20 | #define GCC_C_COMMON_C |
21 | ||
b0fc3e72 | 22 | #include "config.h" |
405711de | 23 | #include "system.h" |
805e22b2 | 24 | #include "coretypes.h" |
4cba6f60 | 25 | #include "target.h" |
26 | #include "function.h" | |
4cba6f60 | 27 | #include "tree.h" |
ea36272b | 28 | #include "memmodel.h" |
7ff8db31 | 29 | #include "c-common.h" |
4cba6f60 | 30 | #include "gimple-expr.h" |
31 | #include "tm_p.h" | |
32 | #include "stringpool.h" | |
33 | #include "cgraph.h" | |
34 | #include "diagnostic.h" | |
e48d0f41 | 35 | #include "intl.h" |
9ed99284 | 36 | #include "stor-layout.h" |
37 | #include "calls.h" | |
9ed99284 | 38 | #include "attribs.h" |
39 | #include "varasm.h" | |
40 | #include "trans-mem.h" | |
6c536c4f | 41 | #include "c-objc.h" |
218e3e4e | 42 | #include "common/common-target.h" |
96554925 | 43 | #include "langhooks.h" |
f3dde807 | 44 | #include "tree-inline.h" |
69579044 | 45 | #include "toplev.h" |
4ee9c684 | 46 | #include "tree-iterator.h" |
e08bd2f4 | 47 | #include "opts.h" |
a8783bee | 48 | #include "gimplify.h" |
d4166bdc | 49 | #include "substring-locations.h" |
5c8151fa | 50 | #include "spellcheck.h" |
d76863c8 | 51 | #include "selftest.h" |
fd6f6435 | 52 | |
90cc7820 | 53 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
a654e028 | 54 | |
de801c28 | 55 | /* Mode used to build pointers (VOIDmode means ptr_mode). */ |
56 | ||
57 | machine_mode c_default_pointer_mode = VOIDmode; | |
58 | ||
72040e7e | 59 | /* The following symbols are subsumed in the c_global_trees array, and |
44e9fa65 | 60 | listed here individually for documentation purposes. |
72040e7e | 61 | |
62 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
63 | ||
64 | tree short_integer_type_node; | |
65 | tree long_integer_type_node; | |
66 | tree long_long_integer_type_node; | |
67 | ||
68 | tree short_unsigned_type_node; | |
69 | tree long_unsigned_type_node; | |
70 | tree long_long_unsigned_type_node; | |
71 | ||
3c2239cf | 72 | tree truthvalue_type_node; |
73 | tree truthvalue_false_node; | |
74 | tree truthvalue_true_node; | |
72040e7e | 75 | |
76 | tree ptrdiff_type_node; | |
77 | ||
78 | tree unsigned_char_type_node; | |
79 | tree signed_char_type_node; | |
80 | tree wchar_type_node; | |
72040e7e | 81 | |
82362779 | 82 | tree char8_type_node; |
924bbf02 | 83 | tree char16_type_node; |
84 | tree char32_type_node; | |
85 | ||
72040e7e | 86 | tree float_type_node; |
87 | tree double_type_node; | |
88 | tree long_double_type_node; | |
89 | ||
90 | tree complex_integer_type_node; | |
91 | tree complex_float_type_node; | |
92 | tree complex_double_type_node; | |
93 | tree complex_long_double_type_node; | |
94 | ||
c4503c0a | 95 | tree dfloat32_type_node; |
96 | tree dfloat64_type_node; | |
97 | tree_dfloat128_type_node; | |
98 | ||
72040e7e | 99 | tree intQI_type_node; |
100 | tree intHI_type_node; | |
101 | tree intSI_type_node; | |
102 | tree intDI_type_node; | |
103 | tree intTI_type_node; | |
104 | ||
105 | tree unsigned_intQI_type_node; | |
106 | tree unsigned_intHI_type_node; | |
107 | tree unsigned_intSI_type_node; | |
108 | tree unsigned_intDI_type_node; | |
109 | tree unsigned_intTI_type_node; | |
110 | ||
111 | tree widest_integer_literal_type_node; | |
112 | tree widest_unsigned_literal_type_node; | |
113 | ||
114 | Nodes for types `void *' and `const void *'. | |
115 | ||
116 | tree ptr_type_node, const_ptr_type_node; | |
117 | ||
118 | Nodes for types `char *' and `const char *'. | |
119 | ||
120 | tree string_type_node, const_string_type_node; | |
121 | ||
122 | Type `char[SOMENUMBER]'. | |
123 | Used when an array of char is needed and the size is irrelevant. | |
124 | ||
125 | tree char_array_type_node; | |
126 | ||
72040e7e | 127 | Type `wchar_t[SOMENUMBER]' or something like it. |
128 | Used when a wide string literal is created. | |
129 | ||
130 | tree wchar_array_type_node; | |
131 | ||
82362779 | 132 | Type `char8_t[SOMENUMBER]' or something like it. |
133 | Used when a UTF-8 string literal is created. | |
134 | ||
135 | tree char8_array_type_node; | |
136 | ||
924bbf02 | 137 | Type `char16_t[SOMENUMBER]' or something like it. |
138 | Used when a UTF-16 string literal is created. | |
139 | ||
140 | tree char16_array_type_node; | |
141 | ||
142 | Type `char32_t[SOMENUMBER]' or something like it. | |
143 | Used when a UTF-32 string literal is created. | |
144 | ||
145 | tree char32_array_type_node; | |
146 | ||
72040e7e | 147 | Type `int ()' -- used for implicit declaration of functions. |
148 | ||
149 | tree default_function_type; | |
150 | ||
72040e7e | 151 | A VOID_TYPE node, packaged in a TREE_LIST. |
152 | ||
153 | tree void_list_node; | |
154 | ||
734c98be | 155 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
65b7f83f | 156 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
157 | VAR_DECLS, but C++ does.) | |
71d9fc9b | 158 | |
65b7f83f | 159 | tree function_name_decl_node; |
734c98be | 160 | tree pretty_function_name_decl_node; |
65b7f83f | 161 | tree c99_function_name_decl_node; |
162 | ||
163 | Stack of nested function name VAR_DECLs. | |
1cae46be | 164 | |
65b7f83f | 165 | tree saved_function_name_decls; |
71d9fc9b | 166 | |
72040e7e | 167 | */ |
168 | ||
169 | tree c_global_trees[CTI_MAX]; | |
573aba85 | 170 | \f |
574a6990 | 171 | /* Switches common to the C front ends. */ |
172 | ||
f7070933 | 173 | /* Nonzero means don't output line number information. */ |
174 | ||
175 | char flag_no_line_commands; | |
176 | ||
177 | /* Nonzero causes -E output not to be done, but directives such as | |
178 | #define that have side effects are still obeyed. */ | |
179 | ||
180 | char flag_no_output; | |
181 | ||
182 | /* Nonzero means dump macros in some fashion. */ | |
183 | ||
184 | char flag_dump_macros; | |
185 | ||
186 | /* Nonzero means pass #include lines through to the output. */ | |
187 | ||
188 | char flag_dump_includes; | |
189 | ||
d718b525 | 190 | /* Nonzero means process PCH files while preprocessing. */ |
191 | ||
192 | bool flag_pch_preprocess; | |
193 | ||
573aba85 | 194 | /* The file name to which we should write a precompiled header, or |
195 | NULL if no header will be written in this compile. */ | |
196 | ||
197 | const char *pch_file; | |
198 | ||
1ed9d5f5 | 199 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
200 | user's namespace. */ | |
201 | int flag_iso; | |
202 | ||
574a6990 | 203 | /* C/ObjC language option variables. */ |
204 | ||
205 | ||
574a6990 | 206 | /* Nonzero means allow type mismatches in conditional expressions; |
207 | just make their values `void'. */ | |
208 | ||
209 | int flag_cond_mismatch; | |
210 | ||
211 | /* Nonzero means enable C89 Amendment 1 features. */ | |
212 | ||
213 | int flag_isoc94; | |
214 | ||
32074525 | 215 | /* Nonzero means use the ISO C99 (or C11) dialect of C. */ |
574a6990 | 216 | |
217 | int flag_isoc99; | |
218 | ||
32074525 | 219 | /* Nonzero means use the ISO C11 dialect of C. */ |
39012afb | 220 | |
32074525 | 221 | int flag_isoc11; |
39012afb | 222 | |
fcbe1d64 | 223 | /* Nonzero means use the ISO C2X dialect of C. */ |
224 | ||
225 | int flag_isoc2x; | |
226 | ||
8b332087 | 227 | /* Nonzero means that we have builtin functions, and main is an int. */ |
574a6990 | 228 | |
229 | int flag_hosted = 1; | |
230 | ||
574a6990 | 231 | |
232 | /* ObjC language option variables. */ | |
233 | ||
234 | ||
574a6990 | 235 | /* Tells the compiler that this is a special run. Do not perform any |
236 | compiling, instead we are to test some platform dependent features | |
237 | and output a C header file with appropriate definitions. */ | |
238 | ||
239 | int print_struct_values; | |
240 | ||
f0b5f617 | 241 | /* Tells the compiler what is the constant string class for ObjC. */ |
574a6990 | 242 | |
243 | const char *constant_string_class_name; | |
244 | ||
574a6990 | 245 | |
246 | /* C++ language option variables. */ | |
247 | ||
229a58b1 | 248 | /* The reference version of the ABI for -Wabi. */ |
249 | ||
250 | int warn_abi_version = -1; | |
574a6990 | 251 | |
574a6990 | 252 | /* Nonzero means generate separate instantiation control files and |
253 | juggle them at link time. */ | |
254 | ||
255 | int flag_use_repository; | |
256 | ||
d875b9d2 | 257 | /* The C++ dialect being used. Default set in c_common_post_options. */ |
0fe6eeac | 258 | |
d875b9d2 | 259 | enum cxx_dialect cxx_dialect = cxx_unset; |
0fe6eeac | 260 | |
9dcd0d49 | 261 | /* Maximum template instantiation depth. This limit exists to limit the |
8ce59854 | 262 | time it takes to notice excessively recursive template instantiations. |
574a6990 | 263 | |
8ce59854 | 264 | The default is lower than the 1024 recommended by the C++0x standard |
265 | because G++ runs out of stack before 1024 with highly recursive template | |
266 | argument deduction substitution (g++.dg/cpp0x/enum11.C). */ | |
267 | ||
268 | int max_tinst_depth = 900; | |
574a6990 | 269 | |
988fc1d1 | 270 | /* The elements of `ridpointers' are identifier nodes for the reserved |
271 | type names and storage classes. It is indexed by a RID_... value. */ | |
272 | tree *ridpointers; | |
273 | ||
e60a6f7b | 274 | tree (*make_fname_decl) (location_t, tree, int); |
9e5a737d | 275 | |
48d94ede | 276 | /* Nonzero means don't warn about problems that occur when the code is |
277 | executed. */ | |
278 | int c_inhibit_evaluation_warnings; | |
e78703c1 | 279 | |
93be21c0 | 280 | /* Whether we are building a boolean conversion inside |
281 | convert_for_assignment, or some other late binary operation. If | |
282 | build_binary_op is called for C (from code shared by C and C++) in | |
283 | this case, then the operands have already been folded and the | |
284 | result will not be folded again, so C_MAYBE_CONST_EXPR should not | |
285 | be generated. */ | |
286 | bool in_late_binary_op; | |
287 | ||
7f5f3953 | 288 | /* Whether lexing has been completed, so subsequent preprocessor |
289 | errors should use the compiler's input_location. */ | |
290 | bool done_lexing = false; | |
291 | ||
2c0e001b | 292 | /* Information about how a function name is generated. */ |
65b7f83f | 293 | struct fname_var_t |
294 | { | |
e99c3a1d | 295 | tree *const decl; /* pointer to the VAR_DECL. */ |
296 | const unsigned rid; /* RID number for the identifier. */ | |
297 | const int pretty; /* How pretty is it? */ | |
65b7f83f | 298 | }; |
299 | ||
2c0e001b | 300 | /* The three ways of getting then name of the current function. */ |
65b7f83f | 301 | |
302 | const struct fname_var_t fname_vars[] = | |
303 | { | |
2c0e001b | 304 | /* C99 compliant __func__, must be first. */ |
65b7f83f | 305 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
2c0e001b | 306 | /* GCC __FUNCTION__ compliant. */ |
65b7f83f | 307 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
2c0e001b | 308 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
65b7f83f | 309 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
310 | {NULL, 0, 0}, | |
311 | }; | |
312 | ||
79396169 | 313 | /* Global visibility options. */ |
314 | struct visibility_flags visibility_options; | |
315 | ||
2d2f6a15 | 316 | static tree check_case_value (location_t, tree); |
be43ff5a | 317 | |
1cae46be | 318 | |
1cae46be | 319 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
320 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
dbf6c367 | 321 | |
5c6e5756 | 322 | /* Reserved words. The third field is a mask: keywords are disabled |
323 | if they match the mask. | |
324 | ||
325 | Masks for languages: | |
326 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
327 | C --std=c99: D_CXXONLY | D_OBJC | |
328 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
5c176ebe | 329 | C++ --std=c++98: D_CONLY | D_CXX11 | D_OBJC |
330 | C++ --std=c++11: D_CONLY | D_OBJC | |
5c6e5756 | 331 | ObjC++ is like C++ except that D_OBJC is not set |
332 | ||
333 | If -fno-asm is used, D_ASM is added to the mask. If | |
334 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
335 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
b27e241e | 336 | In C with -Wc++-compat, we warn if D_CXXWARN is set. |
5c6e5756 | 337 | |
b27e241e | 338 | Note the complication of the D_CXX_OBJC keywords. These are |
339 | reserved words such as 'class'. In C++, 'class' is a reserved | |
340 | word. In Objective-C++ it is too. In Objective-C, it is a | |
341 | reserved word too, but only if it follows an '@' sign. | |
342 | */ | |
5c6e5756 | 343 | const struct c_common_resword c_common_reswords[] = |
344 | { | |
83e25171 | 345 | { "_Alignas", RID_ALIGNAS, D_CONLY }, |
346 | { "_Alignof", RID_ALIGNOF, D_CONLY }, | |
b560fabd | 347 | { "_Atomic", RID_ATOMIC, D_CONLY }, |
5c6e5756 | 348 | { "_Bool", RID_BOOL, D_CONLY }, |
349 | { "_Complex", RID_COMPLEX, 0 }, | |
c1800156 | 350 | { "_Imaginary", RID_IMAGINARY, D_CONLY }, |
82c85aba | 351 | { "_Float16", RID_FLOAT16, D_CONLY }, |
352 | { "_Float32", RID_FLOAT32, D_CONLY }, | |
353 | { "_Float64", RID_FLOAT64, D_CONLY }, | |
354 | { "_Float128", RID_FLOAT128, D_CONLY }, | |
355 | { "_Float32x", RID_FLOAT32X, D_CONLY }, | |
356 | { "_Float64x", RID_FLOAT64X, D_CONLY }, | |
357 | { "_Float128x", RID_FLOAT128X, D_CONLY }, | |
5c6e5756 | 358 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, |
359 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
360 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
361 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
362 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
363 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
f80e7755 | 364 | { "_Static_assert", RID_STATIC_ASSERT, D_CONLY }, |
985c6e3a | 365 | { "_Noreturn", RID_NORETURN, D_CONLY }, |
7aa04c8d | 366 | { "_Generic", RID_GENERIC, D_CONLY }, |
d184e0c0 | 367 | { "_Thread_local", RID_THREAD, D_CONLY }, |
5c6e5756 | 368 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, |
369 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
370 | { "__alignof", RID_ALIGNOF, 0 }, | |
371 | { "__alignof__", RID_ALIGNOF, 0 }, | |
372 | { "__asm", RID_ASM, 0 }, | |
373 | { "__asm__", RID_ASM, 0 }, | |
374 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
375 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
4fba5eb9 | 376 | { "__auto_type", RID_AUTO_TYPE, D_CONLY }, |
e6014a82 | 377 | { "__bases", RID_BASES, D_CXXONLY }, |
cd45162d | 378 | { "__builtin_addressof", RID_ADDRESSOF, D_CXXONLY }, |
6f58cf06 | 379 | { "__builtin_call_with_static_chain", |
380 | RID_BUILTIN_CALL_WITH_STATIC_CHAIN, D_CONLY }, | |
5c6e5756 | 381 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, |
bff4ad11 | 382 | { "__builtin_complex", RID_BUILTIN_COMPLEX, D_CONLY }, |
59409f09 | 383 | { "__builtin_convertvector", RID_BUILTIN_CONVERTVECTOR, 0 }, |
818af1aa | 384 | { "__builtin_has_attribute", RID_BUILTIN_HAS_ATTRIBUTE, 0 }, |
6e1b2ffb | 385 | { "__builtin_launder", RID_BUILTIN_LAUNDER, D_CXXONLY }, |
bf0cb017 | 386 | { "__builtin_shuffle", RID_BUILTIN_SHUFFLE, 0 }, |
aac64699 | 387 | { "__builtin_tgmath", RID_BUILTIN_TGMATH, D_CONLY }, |
5c6e5756 | 388 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, |
389 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
390 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
391 | { "__complex", RID_COMPLEX, 0 }, | |
392 | { "__complex__", RID_COMPLEX, 0 }, | |
393 | { "__const", RID_CONST, 0 }, | |
394 | { "__const__", RID_CONST, 0 }, | |
395 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
e6014a82 | 396 | { "__direct_bases", RID_DIRECT_BASES, D_CXXONLY }, |
5c6e5756 | 397 | { "__extension__", RID_EXTENSION, 0 }, |
398 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
399 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
400 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
401 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
402 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
403 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
404 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
405 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
adeca879 | 406 | { "__has_unique_object_representations", RID_HAS_UNIQUE_OBJ_REPRESENTATIONS, |
407 | D_CXXONLY }, | |
5c6e5756 | 408 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, |
23407dc9 | 409 | { "__imag", RID_IMAGPART, 0 }, |
410 | { "__imag__", RID_IMAGPART, 0 }, | |
411 | { "__inline", RID_INLINE, 0 }, | |
412 | { "__inline__", RID_INLINE, 0 }, | |
5c6e5756 | 413 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, |
ca2af7df | 414 | { "__is_aggregate", RID_IS_AGGREGATE, D_CXXONLY }, |
5c6e5756 | 415 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, |
416 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
5c6e5756 | 417 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, |
418 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
aa4313eb | 419 | { "__is_final", RID_IS_FINAL, D_CXXONLY }, |
23407dc9 | 420 | { "__is_literal_type", RID_IS_LITERAL_TYPE, D_CXXONLY }, |
5c6e5756 | 421 | { "__is_pod", RID_IS_POD, D_CXXONLY }, |
422 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
56c12fd4 | 423 | { "__is_same_as", RID_IS_SAME_AS, D_CXXONLY }, |
c1c67b4f | 424 | { "__is_standard_layout", RID_IS_STD_LAYOUT, D_CXXONLY }, |
425 | { "__is_trivial", RID_IS_TRIVIAL, D_CXXONLY }, | |
f76a9aa8 | 426 | { "__is_trivially_assignable", RID_IS_TRIVIALLY_ASSIGNABLE, D_CXXONLY }, |
427 | { "__is_trivially_constructible", RID_IS_TRIVIALLY_CONSTRUCTIBLE, D_CXXONLY }, | |
717e52f9 | 428 | { "__is_trivially_copyable", RID_IS_TRIVIALLY_COPYABLE, D_CXXONLY }, |
5c6e5756 | 429 | { "__is_union", RID_IS_UNION, D_CXXONLY }, |
5c6e5756 | 430 | { "__label__", RID_LABEL, 0 }, |
431 | { "__null", RID_NULL, 0 }, | |
432 | { "__real", RID_REALPART, 0 }, | |
433 | { "__real__", RID_REALPART, 0 }, | |
434 | { "__restrict", RID_RESTRICT, 0 }, | |
435 | { "__restrict__", RID_RESTRICT, 0 }, | |
436 | { "__signed", RID_SIGNED, 0 }, | |
437 | { "__signed__", RID_SIGNED, 0 }, | |
438 | { "__thread", RID_THREAD, 0 }, | |
4c0315d0 | 439 | { "__transaction_atomic", RID_TRANSACTION_ATOMIC, 0 }, |
440 | { "__transaction_relaxed", RID_TRANSACTION_RELAXED, 0 }, | |
441 | { "__transaction_cancel", RID_TRANSACTION_CANCEL, 0 }, | |
5c6e5756 | 442 | { "__typeof", RID_TYPEOF, 0 }, |
443 | { "__typeof__", RID_TYPEOF, 0 }, | |
23407dc9 | 444 | { "__underlying_type", RID_UNDERLYING_TYPE, D_CXXONLY }, |
5c6e5756 | 445 | { "__volatile", RID_VOLATILE, 0 }, |
446 | { "__volatile__", RID_VOLATILE, 0 }, | |
b1f04d34 | 447 | { "__GIMPLE", RID_GIMPLE, D_CONLY }, |
448 | { "__PHI", RID_PHI, D_CONLY }, | |
175e0d6b | 449 | { "__RTL", RID_RTL, D_CONLY }, |
fa769cc5 | 450 | { "alignas", RID_ALIGNAS, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
451 | { "alignof", RID_ALIGNOF, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
5c6e5756 | 452 | { "asm", RID_ASM, D_ASM }, |
453 | { "auto", RID_AUTO, 0 }, | |
dbd982c9 | 454 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 455 | { "break", RID_BREAK, 0 }, |
456 | { "case", RID_CASE, 0 }, | |
51030405 | 457 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
5c6e5756 | 458 | { "char", RID_CHAR, 0 }, |
82362779 | 459 | { "char8_t", RID_CHAR8, D_CXX_CHAR8_T_FLAGS | D_CXXWARN }, |
fa769cc5 | 460 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
461 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
51030405 | 462 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, |
5c6e5756 | 463 | { "const", RID_CONST, 0 }, |
fa769cc5 | 464 | { "constexpr", RID_CONSTEXPR, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
5c6e5756 | 465 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, |
466 | { "continue", RID_CONTINUE, 0 }, | |
fa769cc5 | 467 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
5c6e5756 | 468 | { "default", RID_DEFAULT, 0 }, |
51030405 | 469 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 470 | { "do", RID_DO, 0 }, |
471 | { "double", RID_DOUBLE, 0 }, | |
472 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
473 | { "else", RID_ELSE, 0 }, | |
474 | { "enum", RID_ENUM, 0 }, | |
51030405 | 475 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
476 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 477 | { "extern", RID_EXTERN, 0 }, |
51030405 | 478 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 479 | { "float", RID_FLOAT, 0 }, |
480 | { "for", RID_FOR, 0 }, | |
51030405 | 481 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
5c6e5756 | 482 | { "goto", RID_GOTO, 0 }, |
483 | { "if", RID_IF, 0 }, | |
484 | { "inline", RID_INLINE, D_EXT89 }, | |
485 | { "int", RID_INT, 0 }, | |
486 | { "long", RID_LONG, 0 }, | |
487 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
51030405 | 488 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
489 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
fa769cc5 | 490 | { "noexcept", RID_NOEXCEPT, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
491 | { "nullptr", RID_NULLPTR, D_CXXONLY | D_CXX11 | D_CXXWARN }, | |
51030405 | 492 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, |
493 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
494 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
495 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 496 | { "register", RID_REGISTER, 0 }, |
497 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
498 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
499 | { "return", RID_RETURN, 0 }, | |
500 | { "short", RID_SHORT, 0 }, | |
501 | { "signed", RID_SIGNED, 0 }, | |
502 | { "sizeof", RID_SIZEOF, 0 }, | |
503 | { "static", RID_STATIC, 0 }, | |
fa769cc5 | 504 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
5c6e5756 | 505 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, |
506 | { "struct", RID_STRUCT, 0 }, | |
507 | { "switch", RID_SWITCH, 0 }, | |
51030405 | 508 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
509 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
fa769cc5 | 510 | { "thread_local", RID_THREAD, D_CXXONLY | D_CXX11 | D_CXXWARN }, |
51030405 | 511 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, |
512 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
513 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
5c6e5756 | 514 | { "typedef", RID_TYPEDEF, 0 }, |
51030405 | 515 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
516 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 517 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
518 | { "union", RID_UNION, 0 }, | |
519 | { "unsigned", RID_UNSIGNED, 0 }, | |
51030405 | 520 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
521 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
5c6e5756 | 522 | { "void", RID_VOID, 0 }, |
523 | { "volatile", RID_VOLATILE, 0 }, | |
524 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
525 | { "while", RID_WHILE, 0 }, | |
b4d90ee2 | 526 | { "__is_assignable", RID_IS_ASSIGNABLE, D_CXXONLY }, |
527 | { "__is_constructible", RID_IS_CONSTRUCTIBLE, D_CXXONLY }, | |
56c12fd4 | 528 | |
6d02e6b2 | 529 | /* C++ transactional memory. */ |
530 | { "synchronized", RID_SYNCHRONIZED, D_CXX_OBJC | D_TRANSMEM }, | |
531 | { "atomic_noexcept", RID_ATOMIC_NOEXCEPT, D_CXXONLY | D_TRANSMEM }, | |
532 | { "atomic_cancel", RID_ATOMIC_CANCEL, D_CXXONLY | D_TRANSMEM }, | |
533 | { "atomic_commit", RID_TRANSACTION_ATOMIC, D_CXXONLY | D_TRANSMEM }, | |
534 | ||
56c12fd4 | 535 | /* Concepts-related keywords */ |
536 | { "concept", RID_CONCEPT, D_CXX_CONCEPTS_FLAGS | D_CXXWARN }, | |
537 | { "requires", RID_REQUIRES, D_CXX_CONCEPTS_FLAGS | D_CXXWARN }, | |
538 | ||
5c6e5756 | 539 | /* These Objective-C keywords are recognized only immediately after |
540 | an '@'. */ | |
541 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
542 | { "defs", RID_AT_DEFS, D_OBJC }, | |
543 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
544 | { "end", RID_AT_END, D_OBJC }, | |
545 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
546 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
547 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
548 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
549 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
069761fb | 550 | { "optional", RID_AT_OPTIONAL, D_OBJC }, |
551 | { "required", RID_AT_REQUIRED, D_OBJC }, | |
86c110ac | 552 | { "property", RID_AT_PROPERTY, D_OBJC }, |
4a8875ed | 553 | { "package", RID_AT_PACKAGE, D_OBJC }, |
e1f293c0 | 554 | { "synthesize", RID_AT_SYNTHESIZE, D_OBJC }, |
555 | { "dynamic", RID_AT_DYNAMIC, D_OBJC }, | |
5c6e5756 | 556 | /* These are recognized only in protocol-qualifier context |
557 | (see above) */ | |
558 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
559 | { "byref", RID_BYREF, D_OBJC }, | |
560 | { "in", RID_IN, D_OBJC }, | |
561 | { "inout", RID_INOUT, D_OBJC }, | |
562 | { "oneway", RID_ONEWAY, D_OBJC }, | |
563 | { "out", RID_OUT, D_OBJC }, | |
86c110ac | 564 | /* These are recognized inside a property attribute list */ |
7590f0e5 | 565 | { "assign", RID_ASSIGN, D_OBJC }, |
566 | { "copy", RID_COPY, D_OBJC }, | |
86c110ac | 567 | { "getter", RID_GETTER, D_OBJC }, |
7590f0e5 | 568 | { "nonatomic", RID_NONATOMIC, D_OBJC }, |
569 | { "readonly", RID_READONLY, D_OBJC }, | |
570 | { "readwrite", RID_READWRITE, D_OBJC }, | |
571 | { "retain", RID_RETAIN, D_OBJC }, | |
86c110ac | 572 | { "setter", RID_SETTER, D_OBJC }, |
5c6e5756 | 573 | }; |
574 | ||
575 | const unsigned int num_c_common_reswords = | |
576 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
577 | ||
6d5d708e | 578 | /* Return identifier for address space AS. */ |
34208e18 | 579 | |
6d5d708e | 580 | const char * |
581 | c_addr_space_name (addr_space_t as) | |
582 | { | |
34208e18 | 583 | int rid = RID_FIRST_ADDR_SPACE + as; |
584 | gcc_assert (ridpointers [rid]); | |
585 | return IDENTIFIER_POINTER (ridpointers [rid]); | |
6d5d708e | 586 | } |
587 | ||
2c0e001b | 588 | /* Push current bindings for the function name VAR_DECLS. */ |
f4e3c278 | 589 | |
590 | void | |
1cae46be | 591 | start_fname_decls (void) |
f4e3c278 | 592 | { |
65b7f83f | 593 | unsigned ix; |
594 | tree saved = NULL_TREE; | |
1cae46be | 595 | |
65b7f83f | 596 | for (ix = 0; fname_vars[ix].decl; ix++) |
597 | { | |
598 | tree decl = *fname_vars[ix].decl; | |
f4e3c278 | 599 | |
65b7f83f | 600 | if (decl) |
601 | { | |
ceb7b692 | 602 | saved = tree_cons (decl, build_int_cst (integer_type_node, ix), |
603 | saved); | |
65b7f83f | 604 | *fname_vars[ix].decl = NULL_TREE; |
605 | } | |
606 | } | |
607 | if (saved || saved_function_name_decls) | |
608 | /* Normally they'll have been NULL, so only push if we've got a | |
609 | stack, or they are non-NULL. */ | |
610 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
611 | saved_function_name_decls); | |
612 | } | |
613 | ||
2363ef00 | 614 | /* Finish up the current bindings, adding them into the current function's |
615 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
616 | If there is no current function, we must be at file scope and no statements | |
617 | are involved. Pop the previous bindings. */ | |
65b7f83f | 618 | |
619 | void | |
1cae46be | 620 | finish_fname_decls (void) |
65b7f83f | 621 | { |
622 | unsigned ix; | |
2363ef00 | 623 | tree stmts = NULL_TREE; |
65b7f83f | 624 | tree stack = saved_function_name_decls; |
625 | ||
626 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
2363ef00 | 627 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
1cae46be | 628 | |
2363ef00 | 629 | if (stmts) |
65b7f83f | 630 | { |
2363ef00 | 631 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
5c423bd6 | 632 | |
2363ef00 | 633 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
634 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
81010c97 | 635 | |
bc2b76e0 | 636 | append_to_statement_list_force (*bodyp, &stmts); |
2363ef00 | 637 | *bodyp = stmts; |
65b7f83f | 638 | } |
1cae46be | 639 | |
65b7f83f | 640 | for (ix = 0; fname_vars[ix].decl; ix++) |
641 | *fname_vars[ix].decl = NULL_TREE; | |
1cae46be | 642 | |
65b7f83f | 643 | if (stack) |
f4e3c278 | 644 | { |
2c0e001b | 645 | /* We had saved values, restore them. */ |
65b7f83f | 646 | tree saved; |
647 | ||
648 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
649 | { | |
650 | tree decl = TREE_PURPOSE (saved); | |
f9ae6f95 | 651 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); |
1cae46be | 652 | |
65b7f83f | 653 | *fname_vars[ix].decl = decl; |
654 | } | |
655 | stack = TREE_CHAIN (stack); | |
f4e3c278 | 656 | } |
65b7f83f | 657 | saved_function_name_decls = stack; |
658 | } | |
659 | ||
81010c97 | 660 | /* Return the text name of the current function, suitably prettified |
5fc7fa69 | 661 | by PRETTY_P. Return string must be freed by caller. */ |
65b7f83f | 662 | |
663 | const char * | |
1cae46be | 664 | fname_as_string (int pretty_p) |
65b7f83f | 665 | { |
9ad4bb1e | 666 | const char *name = "top level"; |
5fc7fa69 | 667 | char *namep; |
8115b8be | 668 | int vrb = 2, len; |
669 | cpp_string cstr = { 0, 0 }, strname; | |
9ad4bb1e | 670 | |
84166705 | 671 | if (!pretty_p) |
9ad4bb1e | 672 | { |
673 | name = ""; | |
674 | vrb = 0; | |
675 | } | |
676 | ||
677 | if (current_function_decl) | |
dc24ddbd | 678 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
9ad4bb1e | 679 | |
8115b8be | 680 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
5fc7fa69 | 681 | |
8115b8be | 682 | namep = XNEWVEC (char, len); |
683 | snprintf (namep, len, "\"%s\"", name); | |
684 | strname.text = (unsigned char *) namep; | |
685 | strname.len = len - 1; | |
5fc7fa69 | 686 | |
924bbf02 | 687 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
8115b8be | 688 | { |
689 | XDELETEVEC (namep); | |
690 | return (const char *) cstr.text; | |
5fc7fa69 | 691 | } |
5fc7fa69 | 692 | |
693 | return namep; | |
65b7f83f | 694 | } |
695 | ||
65b7f83f | 696 | /* Return the VAR_DECL for a const char array naming the current |
697 | function. If the VAR_DECL has not yet been created, create it | |
698 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
699 | ID is its name (unfortunately C and C++ hold the RID values of | |
700 | keywords in different places, so we can't derive RID from ID in | |
e3b80d49 | 701 | this language independent code. LOC is the location of the |
702 | function. */ | |
65b7f83f | 703 | |
704 | tree | |
e3b80d49 | 705 | fname_decl (location_t loc, unsigned int rid, tree id) |
65b7f83f | 706 | { |
707 | unsigned ix; | |
708 | tree decl = NULL_TREE; | |
709 | ||
710 | for (ix = 0; fname_vars[ix].decl; ix++) | |
711 | if (fname_vars[ix].rid == rid) | |
712 | break; | |
713 | ||
714 | decl = *fname_vars[ix].decl; | |
715 | if (!decl) | |
f4e3c278 | 716 | { |
2222b3c6 | 717 | /* If a tree is built here, it would normally have the lineno of |
718 | the current statement. Later this tree will be moved to the | |
719 | beginning of the function and this line number will be wrong. | |
720 | To avoid this problem set the lineno to 0 here; that prevents | |
7299020b | 721 | it from appearing in the RTL. */ |
2363ef00 | 722 | tree stmts; |
9a6486a6 | 723 | location_t saved_location = input_location; |
9a6486a6 | 724 | input_location = UNKNOWN_LOCATION; |
1cae46be | 725 | |
2363ef00 | 726 | stmts = push_stmt_list (); |
e60a6f7b | 727 | decl = (*make_fname_decl) (loc, id, fname_vars[ix].pretty); |
2363ef00 | 728 | stmts = pop_stmt_list (stmts); |
729 | if (!IS_EMPTY_STMT (stmts)) | |
730 | saved_function_name_decls | |
731 | = tree_cons (decl, stmts, saved_function_name_decls); | |
65b7f83f | 732 | *fname_vars[ix].decl = decl; |
9a6486a6 | 733 | input_location = saved_location; |
f4e3c278 | 734 | } |
65b7f83f | 735 | if (!ix && !current_function_decl) |
e3b80d49 | 736 | pedwarn (loc, 0, "%qD is not defined outside of function scope", decl); |
81010c97 | 737 | |
65b7f83f | 738 | return decl; |
f4e3c278 | 739 | } |
740 | ||
070236f0 | 741 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b0fc3e72 | 742 | |
743 | tree | |
1cae46be | 744 | fix_string_type (tree value) |
b0fc3e72 | 745 | { |
070236f0 | 746 | int length = TREE_STRING_LENGTH (value); |
bee3d99f | 747 | int nchars, charsz; |
00d26680 | 748 | tree e_type, i_type, a_type; |
749 | ||
73be5127 | 750 | /* Compute the number of elements, for the array type. */ |
924bbf02 | 751 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
752 | { | |
bee3d99f | 753 | charsz = 1; |
924bbf02 | 754 | e_type = char_type_node; |
755 | } | |
82362779 | 756 | else if (flag_char8_t && TREE_TYPE (value) == char8_array_type_node) |
757 | { | |
758 | charsz = TYPE_PRECISION (char8_type_node) / BITS_PER_UNIT; | |
759 | e_type = char8_type_node; | |
760 | } | |
924bbf02 | 761 | else if (TREE_TYPE (value) == char16_array_type_node) |
762 | { | |
bee3d99f | 763 | charsz = TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT; |
924bbf02 | 764 | e_type = char16_type_node; |
765 | } | |
766 | else if (TREE_TYPE (value) == char32_array_type_node) | |
767 | { | |
bee3d99f | 768 | charsz = TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT; |
924bbf02 | 769 | e_type = char32_type_node; |
770 | } | |
771 | else | |
772 | { | |
bee3d99f | 773 | charsz = TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT; |
924bbf02 | 774 | e_type = wchar_type_node; |
775 | } | |
b0fc3e72 | 776 | |
bee3d99f | 777 | /* This matters only for targets where ssizetype has smaller precision |
778 | than 32 bits. */ | |
779 | if (wi::lts_p (wi::to_wide (TYPE_MAX_VALUE (ssizetype)), length)) | |
780 | { | |
781 | error ("size of string literal is too large"); | |
782 | length = tree_to_shwi (TYPE_MAX_VALUE (ssizetype)) / charsz * charsz; | |
783 | char *str = CONST_CAST (char *, TREE_STRING_POINTER (value)); | |
784 | memset (str + length, '\0', | |
785 | MIN (TREE_STRING_LENGTH (value) - length, charsz)); | |
786 | TREE_STRING_LENGTH (value) = length; | |
787 | } | |
788 | nchars = length / charsz; | |
789 | ||
1d752508 | 790 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
791 | limit in C++98 Annex B is very large (65536) and is not normative, | |
792 | so we do not diagnose it (warn_overlength_strings is forced off | |
793 | in c_common_post_options). */ | |
794 | if (warn_overlength_strings) | |
795 | { | |
796 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
797 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
798 | if (nchars - 1 > nchars_max) | |
799 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
800 | separate the %d from the 'C'. 'ISO' should not be | |
801 | translated, but it may be moved after 'C%d' in languages | |
802 | where modifiers follow nouns. */ | |
21ca8540 | 803 | pedwarn (input_location, OPT_Woverlength_strings, |
8864917d | 804 | "string length %qd is greater than the length %qd " |
1d752508 | 805 | "ISO C%d compilers are required to support", |
806 | nchars - 1, nchars_max, relevant_std); | |
807 | } | |
82cfc7f7 | 808 | |
390be14e | 809 | /* Create the array type for the string constant. The ISO C++ |
810 | standard says that a string literal has type `const char[N]' or | |
811 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
812 | front-end with -Wwrite-strings. | |
813 | ??? We should change the type of an expression depending on the | |
814 | state of a warning flag. We should just be warning -- see how | |
815 | this is handled in the C++ front-end for the deprecated implicit | |
816 | conversion from string literals to `char*' or `wchar_t*'. | |
00d26680 | 817 | |
818 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
819 | array type being the unqualified version of that type. | |
820 | Therefore, if we are constructing an array of const char, we must | |
821 | construct the matching unqualified array type first. The C front | |
822 | end does not require this, but it does no harm, so we do it | |
823 | unconditionally. */ | |
ceb7b692 | 824 | i_type = build_index_type (size_int (nchars - 1)); |
00d26680 | 825 | a_type = build_array_type (e_type, i_type); |
390be14e | 826 | if (c_dialect_cxx() || warn_write_strings) |
aebc8537 | 827 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
3a10ba35 | 828 | |
00d26680 | 829 | TREE_TYPE (value) = a_type; |
b8e3b7ad | 830 | TREE_CONSTANT (value) = 1; |
a814bad5 | 831 | TREE_READONLY (value) = 1; |
b0fc3e72 | 832 | TREE_STATIC (value) = 1; |
833 | return value; | |
834 | } | |
d4166bdc | 835 | |
836 | /* Given a string of type STRING_TYPE, determine what kind of string | |
837 | token would give an equivalent execution encoding: CPP_STRING, | |
838 | CPP_STRING16, or CPP_STRING32. Return CPP_OTHER in case of error. | |
839 | This may not be exactly the string token type that initially created | |
840 | the string, since CPP_WSTRING is indistinguishable from the 16/32 bit | |
82362779 | 841 | string type, and CPP_UTF8STRING is indistinguishable from CPP_STRING |
842 | at this point. | |
d4166bdc | 843 | |
844 | This effectively reverses part of the logic in lex_string and | |
845 | fix_string_type. */ | |
846 | ||
847 | static enum cpp_ttype | |
848 | get_cpp_ttype_from_string_type (tree string_type) | |
849 | { | |
850 | gcc_assert (string_type); | |
3da97ff7 | 851 | if (TREE_CODE (string_type) == POINTER_TYPE) |
852 | string_type = TREE_TYPE (string_type); | |
853 | ||
d4166bdc | 854 | if (TREE_CODE (string_type) != ARRAY_TYPE) |
855 | return CPP_OTHER; | |
856 | ||
857 | tree element_type = TREE_TYPE (string_type); | |
858 | if (TREE_CODE (element_type) != INTEGER_TYPE) | |
859 | return CPP_OTHER; | |
860 | ||
861 | int bits_per_character = TYPE_PRECISION (element_type); | |
862 | switch (bits_per_character) | |
863 | { | |
864 | case 8: | |
865 | return CPP_STRING; /* It could have also been CPP_UTF8STRING. */ | |
866 | case 16: | |
867 | return CPP_STRING16; | |
868 | case 32: | |
869 | return CPP_STRING32; | |
870 | } | |
871 | ||
872 | return CPP_OTHER; | |
873 | } | |
874 | ||
875 | /* The global record of string concatentations, for use in | |
876 | extracting locations within string literals. */ | |
877 | ||
878 | GTY(()) string_concat_db *g_string_concat_db; | |
879 | ||
3da97ff7 | 880 | /* Implementation of LANG_HOOKS_GET_SUBSTRING_LOCATION. */ |
d4166bdc | 881 | |
882 | const char * | |
3da97ff7 | 883 | c_get_substring_location (const substring_loc &substr_loc, |
884 | location_t *out_loc) | |
d4166bdc | 885 | { |
3da97ff7 | 886 | enum cpp_ttype tok_type |
887 | = get_cpp_ttype_from_string_type (substr_loc.get_string_type ()); | |
d4166bdc | 888 | if (tok_type == CPP_OTHER) |
889 | return "unrecognized string type"; | |
890 | ||
be1e7283 | 891 | return get_location_within_string (parse_in, g_string_concat_db, |
892 | substr_loc.get_fmt_string_loc (), | |
893 | tok_type, | |
894 | substr_loc.get_caret_idx (), | |
895 | substr_loc.get_start_idx (), | |
896 | substr_loc.get_end_idx (), | |
897 | out_loc); | |
d4166bdc | 898 | } |
899 | ||
b0fc3e72 | 900 | \f |
8f8828ba | 901 | /* Return true iff T is a boolean promoted to int. */ |
902 | ||
0f4cea33 | 903 | bool |
8f8828ba | 904 | bool_promoted_to_int_p (tree t) |
905 | { | |
906 | return (CONVERT_EXPR_P (t) | |
907 | && TREE_TYPE (t) == integer_type_node | |
908 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == BOOLEAN_TYPE); | |
909 | } | |
910 | ||
73437615 | 911 | /* vector_targets_convertible_p is used for vector pointer types. The |
912 | callers perform various checks that the qualifiers are satisfactory, | |
913 | while OTOH vector_targets_convertible_p ignores the number of elements | |
914 | in the vectors. That's fine with vector pointers as we can consider, | |
915 | say, a vector of 8 elements as two consecutive vectors of 4 elements, | |
916 | and that does not require and conversion of the pointer values. | |
917 | In contrast, vector_types_convertible_p and | |
918 | vector_types_compatible_elements_p are used for vector value types. */ | |
ed7c4e62 | 919 | /* True if pointers to distinct types T1 and T2 can be converted to |
920 | each other without an explicit cast. Only returns true for opaque | |
921 | vector types. */ | |
922 | bool | |
923 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
924 | { | |
6290f0db | 925 | if (VECTOR_TYPE_P (t1) && VECTOR_TYPE_P (t2) |
8d125f7d | 926 | && (TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ed7c4e62 | 927 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
928 | return true; | |
929 | ||
930 | return false; | |
931 | } | |
932 | ||
73437615 | 933 | /* vector_types_convertible_p is used for vector value types. |
934 | It could in principle call vector_targets_convertible_p as a subroutine, | |
935 | but then the check for vector type would be duplicated with its callers, | |
936 | and also the purpose of vector_targets_convertible_p would become | |
937 | muddled. | |
938 | Where vector_types_convertible_p returns true, a conversion might still be | |
939 | needed to make the types match. | |
940 | In contrast, vector_targets_convertible_p is used for vector pointer | |
941 | values, and vector_types_compatible_elements_p is used specifically | |
942 | in the context for binary operators, as a check if use is possible without | |
943 | conversion. */ | |
546c4794 | 944 | /* True if vector types T1 and T2 can be converted to each other |
945 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
946 | can only be converted with -flax-vector-conversions yet that is not | |
947 | in effect, emit a note telling the user about that option if such | |
948 | a note has not previously been emitted. */ | |
949 | bool | |
9f627b1a | 950 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
8b4b9810 | 951 | { |
546c4794 | 952 | static bool emitted_lax_note = false; |
ae6db8ab | 953 | bool convertible_lax; |
954 | ||
8d125f7d | 955 | if ((TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2)) |
ae6db8ab | 956 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) |
957 | return true; | |
958 | ||
959 | convertible_lax = | |
960 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
f08ee65f | 961 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE |
962 | || known_eq (TYPE_VECTOR_SUBPARTS (t1), | |
963 | TYPE_VECTOR_SUBPARTS (t2))) | |
ae6db8ab | 964 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) |
965 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
546c4794 | 966 | |
967 | if (!convertible_lax || flag_lax_vector_conversions) | |
968 | return convertible_lax; | |
969 | ||
f08ee65f | 970 | if (known_eq (TYPE_VECTOR_SUBPARTS (t1), TYPE_VECTOR_SUBPARTS (t2)) |
29f51994 | 971 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
546c4794 | 972 | return true; |
973 | ||
974 | if (emit_lax_note && !emitted_lax_note) | |
975 | { | |
976 | emitted_lax_note = true; | |
2f6d557f | 977 | inform (input_location, "use %<-flax-vector-conversions%> to permit " |
546c4794 | 978 | "conversions between vectors with differing " |
979 | "element types or numbers of subparts"); | |
980 | } | |
981 | ||
982 | return false; | |
8b4b9810 | 983 | } |
984 | ||
bf0cb017 | 985 | /* Build a VEC_PERM_EXPR if V0, V1 and MASK are not error_mark_nodes |
986 | and have vector types, V0 has the same type as V1, and the number of | |
987 | elements of V0, V1, MASK is the same. | |
988 | ||
989 | In case V1 is a NULL_TREE it is assumed that __builtin_shuffle was | |
990 | called with two arguments. In this case implementation passes the | |
991 | first argument twice in order to share the same tree code. This fact | |
992 | could enable the mask-values being twice the vector length. This is | |
993 | an implementation accident and this semantics is not guaranteed to | |
994 | the user. */ | |
995 | tree | |
68ea4406 | 996 | c_build_vec_perm_expr (location_t loc, tree v0, tree v1, tree mask, |
997 | bool complain) | |
bf0cb017 | 998 | { |
999 | tree ret; | |
1000 | bool wrap = true; | |
1001 | bool maybe_const = false; | |
1002 | bool two_arguments = false; | |
1003 | ||
1004 | if (v1 == NULL_TREE) | |
1005 | { | |
1006 | two_arguments = true; | |
1007 | v1 = v0; | |
1008 | } | |
1009 | ||
1010 | if (v0 == error_mark_node || v1 == error_mark_node | |
1011 | || mask == error_mark_node) | |
1012 | return error_mark_node; | |
1013 | ||
6290f0db | 1014 | if (!VECTOR_INTEGER_TYPE_P (TREE_TYPE (mask))) |
bf0cb017 | 1015 | { |
68ea4406 | 1016 | if (complain) |
2f6d557f | 1017 | error_at (loc, "%<__builtin_shuffle%> last argument must " |
68ea4406 | 1018 | "be an integer vector"); |
bf0cb017 | 1019 | return error_mark_node; |
1020 | } | |
1021 | ||
6290f0db | 1022 | if (!VECTOR_TYPE_P (TREE_TYPE (v0)) |
1023 | || !VECTOR_TYPE_P (TREE_TYPE (v1))) | |
bf0cb017 | 1024 | { |
68ea4406 | 1025 | if (complain) |
2f6d557f | 1026 | error_at (loc, "%<__builtin_shuffle%> arguments must be vectors"); |
bf0cb017 | 1027 | return error_mark_node; |
1028 | } | |
1029 | ||
1030 | if (TYPE_MAIN_VARIANT (TREE_TYPE (v0)) != TYPE_MAIN_VARIANT (TREE_TYPE (v1))) | |
1031 | { | |
68ea4406 | 1032 | if (complain) |
2f6d557f | 1033 | error_at (loc, "%<__builtin_shuffle%> argument vectors must be of " |
68ea4406 | 1034 | "the same type"); |
bf0cb017 | 1035 | return error_mark_node; |
1036 | } | |
1037 | ||
f08ee65f | 1038 | if (maybe_ne (TYPE_VECTOR_SUBPARTS (TREE_TYPE (v0)), |
1039 | TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask))) | |
1040 | && maybe_ne (TYPE_VECTOR_SUBPARTS (TREE_TYPE (v1)), | |
1041 | TYPE_VECTOR_SUBPARTS (TREE_TYPE (mask)))) | |
bf0cb017 | 1042 | { |
68ea4406 | 1043 | if (complain) |
2f6d557f | 1044 | error_at (loc, "%<__builtin_shuffle%> number of elements of the " |
68ea4406 | 1045 | "argument vector(s) and the mask vector should " |
1046 | "be the same"); | |
bf0cb017 | 1047 | return error_mark_node; |
1048 | } | |
1049 | ||
3d2b0034 | 1050 | if (GET_MODE_BITSIZE (SCALAR_TYPE_MODE (TREE_TYPE (TREE_TYPE (v0)))) |
1051 | != GET_MODE_BITSIZE (SCALAR_TYPE_MODE (TREE_TYPE (TREE_TYPE (mask))))) | |
bf0cb017 | 1052 | { |
68ea4406 | 1053 | if (complain) |
2f6d557f | 1054 | error_at (loc, "%<__builtin_shuffle%> argument vector(s) inner type " |
68ea4406 | 1055 | "must have the same size as inner type of the mask"); |
bf0cb017 | 1056 | return error_mark_node; |
1057 | } | |
1058 | ||
1059 | if (!c_dialect_cxx ()) | |
1060 | { | |
1061 | /* Avoid C_MAYBE_CONST_EXPRs inside VEC_PERM_EXPR. */ | |
1062 | v0 = c_fully_fold (v0, false, &maybe_const); | |
1063 | wrap &= maybe_const; | |
1064 | ||
1065 | if (two_arguments) | |
1066 | v1 = v0 = save_expr (v0); | |
1067 | else | |
1068 | { | |
1069 | v1 = c_fully_fold (v1, false, &maybe_const); | |
1070 | wrap &= maybe_const; | |
1071 | } | |
1072 | ||
1073 | mask = c_fully_fold (mask, false, &maybe_const); | |
1074 | wrap &= maybe_const; | |
1075 | } | |
68ea4406 | 1076 | else if (two_arguments) |
1077 | v1 = v0 = save_expr (v0); | |
bf0cb017 | 1078 | |
1079 | ret = build3_loc (loc, VEC_PERM_EXPR, TREE_TYPE (v0), v0, v1, mask); | |
1080 | ||
1081 | if (!c_dialect_cxx () && !wrap) | |
1082 | ret = c_wrap_maybe_const (ret, true); | |
1083 | ||
1084 | return ret; | |
1085 | } | |
1086 | ||
59409f09 | 1087 | /* Build a VEC_CONVERT ifn for __builtin_convertvector builtin. */ |
1088 | ||
1089 | tree | |
1090 | c_build_vec_convert (location_t loc1, tree expr, location_t loc2, tree type, | |
1091 | bool complain) | |
1092 | { | |
1093 | if (error_operand_p (type)) | |
1094 | return error_mark_node; | |
1095 | if (error_operand_p (expr)) | |
1096 | return error_mark_node; | |
1097 | ||
1098 | if (!VECTOR_INTEGER_TYPE_P (TREE_TYPE (expr)) | |
1099 | && !VECTOR_FLOAT_TYPE_P (TREE_TYPE (expr))) | |
1100 | { | |
1101 | if (complain) | |
1102 | error_at (loc1, "%<__builtin_convertvector%> first argument must " | |
1103 | "be an integer or floating vector"); | |
1104 | return error_mark_node; | |
1105 | } | |
1106 | ||
1107 | if (!VECTOR_INTEGER_TYPE_P (type) && !VECTOR_FLOAT_TYPE_P (type)) | |
1108 | { | |
1109 | if (complain) | |
1110 | error_at (loc2, "%<__builtin_convertvector%> second argument must " | |
1111 | "be an integer or floating vector type"); | |
1112 | return error_mark_node; | |
1113 | } | |
1114 | ||
1115 | if (maybe_ne (TYPE_VECTOR_SUBPARTS (TREE_TYPE (expr)), | |
1116 | TYPE_VECTOR_SUBPARTS (type))) | |
1117 | { | |
1118 | if (complain) | |
1119 | error_at (loc1, "%<__builtin_convertvector%> number of elements " | |
1120 | "of the first argument vector and the second argument " | |
1121 | "vector type should be the same"); | |
1122 | return error_mark_node; | |
1123 | } | |
1124 | ||
1125 | if ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (expr))) | |
1126 | == TYPE_MAIN_VARIANT (TREE_TYPE (type))) | |
1127 | || (VECTOR_INTEGER_TYPE_P (TREE_TYPE (expr)) | |
1128 | && VECTOR_INTEGER_TYPE_P (type) | |
1129 | && (TYPE_PRECISION (TREE_TYPE (TREE_TYPE (expr))) | |
1130 | == TYPE_PRECISION (TREE_TYPE (type))))) | |
1131 | return build1_loc (loc1, VIEW_CONVERT_EXPR, type, expr); | |
1132 | ||
1133 | bool wrap = true; | |
1134 | bool maybe_const = false; | |
1135 | tree ret; | |
1136 | if (!c_dialect_cxx ()) | |
1137 | { | |
1138 | /* Avoid C_MAYBE_CONST_EXPRs inside of VEC_CONVERT argument. */ | |
1139 | expr = c_fully_fold (expr, false, &maybe_const); | |
1140 | wrap &= maybe_const; | |
1141 | } | |
1142 | ||
1143 | ret = build_call_expr_internal_loc (loc1, IFN_VEC_CONVERT, type, 1, expr); | |
1144 | ||
1145 | if (!wrap) | |
1146 | ret = c_wrap_maybe_const (ret, true); | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | ||
7f506bca | 1151 | /* Like tree.c:get_narrower, but retain conversion from C++0x scoped enum |
1152 | to integral type. */ | |
1153 | ||
0f4cea33 | 1154 | tree |
7f506bca | 1155 | c_common_get_narrower (tree op, int *unsignedp_ptr) |
1156 | { | |
1157 | op = get_narrower (op, unsignedp_ptr); | |
1158 | ||
1159 | if (TREE_CODE (TREE_TYPE (op)) == ENUMERAL_TYPE | |
1160 | && ENUM_IS_SCOPED (TREE_TYPE (op))) | |
1161 | { | |
1162 | /* C++0x scoped enumerations don't implicitly convert to integral | |
1163 | type; if we stripped an explicit conversion to a larger type we | |
1164 | need to replace it so common_type will still work. */ | |
a51edb4c | 1165 | tree type = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op)), |
1166 | TYPE_UNSIGNED (TREE_TYPE (op))); | |
7f506bca | 1167 | op = fold_convert (type, op); |
1168 | } | |
1169 | return op; | |
1170 | } | |
1171 | ||
2561cea2 | 1172 | /* This is a helper function of build_binary_op. |
1173 | ||
1174 | For certain operations if both args were extended from the same | |
1175 | smaller type, do the arithmetic in that type and then extend. | |
1176 | ||
1177 | BITWISE indicates a bitwise operation. | |
1178 | For them, this optimization is safe only if | |
1179 | both args are zero-extended or both are sign-extended. | |
1180 | Otherwise, we might change the result. | |
1181 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
48e1416a | 1182 | but calculated in (unsigned short) it would be (unsigned short)-1. |
2561cea2 | 1183 | */ |
7f506bca | 1184 | tree |
1185 | shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
2561cea2 | 1186 | { |
1187 | int unsigned0, unsigned1; | |
1188 | tree arg0, arg1; | |
1189 | int uns; | |
1190 | tree type; | |
1191 | ||
1192 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
1193 | excessive narrowing when we call get_narrower below. For | |
1194 | example, suppose that OP0 is of unsigned int extended | |
1195 | from signed char and that RESULT_TYPE is long long int. | |
1196 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
1197 | like | |
48e1416a | 1198 | |
2561cea2 | 1199 | (long long int) (unsigned int) signed_char |
1200 | ||
1201 | which get_narrower would narrow down to | |
48e1416a | 1202 | |
2561cea2 | 1203 | (unsigned int) signed char |
48e1416a | 1204 | |
2561cea2 | 1205 | If we do not cast OP0 first, get_narrower would return |
1206 | signed_char, which is inconsistent with the case of the | |
1207 | explicit cast. */ | |
1208 | op0 = convert (result_type, op0); | |
1209 | op1 = convert (result_type, op1); | |
1210 | ||
7f506bca | 1211 | arg0 = c_common_get_narrower (op0, &unsigned0); |
1212 | arg1 = c_common_get_narrower (op1, &unsigned1); | |
ab2c1de8 | 1213 | |
2561cea2 | 1214 | /* UNS is 1 if the operation to be done is an unsigned one. */ |
1215 | uns = TYPE_UNSIGNED (result_type); | |
1216 | ||
1217 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
1218 | but it *requires* conversion to FINAL_TYPE. */ | |
48e1416a | 1219 | |
2561cea2 | 1220 | if ((TYPE_PRECISION (TREE_TYPE (op0)) |
1221 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1222 | && TREE_TYPE (op0) != result_type) | |
1223 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
1224 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
1225 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
1226 | && TREE_TYPE (op1) != result_type) | |
1227 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
48e1416a | 1228 | |
2561cea2 | 1229 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ |
48e1416a | 1230 | |
2561cea2 | 1231 | /* For bitwise operations, signedness of nominal type |
1232 | does not matter. Consider only how operands were extended. */ | |
1233 | if (bitwise) | |
1234 | uns = unsigned0; | |
48e1416a | 1235 | |
2561cea2 | 1236 | /* Note that in all three cases below we refrain from optimizing |
1237 | an unsigned operation on sign-extended args. | |
1238 | That would not be valid. */ | |
48e1416a | 1239 | |
2561cea2 | 1240 | /* Both args variable: if both extended in same way |
1241 | from same width, do it in that width. | |
1242 | Do it unsigned if args were zero-extended. */ | |
1243 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
1244 | < TYPE_PRECISION (result_type)) | |
1245 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1246 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1247 | && unsigned0 == unsigned1 | |
1248 | && (unsigned0 || !uns)) | |
1249 | return c_common_signed_or_unsigned_type | |
1250 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
1251 | ||
1252 | else if (TREE_CODE (arg0) == INTEGER_CST | |
1253 | && (unsigned1 || !uns) | |
1254 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1255 | < TYPE_PRECISION (result_type)) | |
1256 | && (type | |
1257 | = c_common_signed_or_unsigned_type (unsigned1, | |
1258 | TREE_TYPE (arg1))) | |
1259 | && !POINTER_TYPE_P (type) | |
1260 | && int_fits_type_p (arg0, type)) | |
1261 | return type; | |
1262 | ||
1263 | else if (TREE_CODE (arg1) == INTEGER_CST | |
1264 | && (unsigned0 || !uns) | |
1265 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
1266 | < TYPE_PRECISION (result_type)) | |
1267 | && (type | |
1268 | = c_common_signed_or_unsigned_type (unsigned0, | |
1269 | TREE_TYPE (arg0))) | |
1270 | && !POINTER_TYPE_P (type) | |
1271 | && int_fits_type_p (arg1, type)) | |
1272 | return type; | |
1273 | ||
1274 | return result_type; | |
1275 | } | |
1276 | ||
e53013a8 | 1277 | /* Returns true iff any integer value of type FROM_TYPE can be represented as |
1278 | real of type TO_TYPE. This is a helper function for unsafe_conversion_p. */ | |
1279 | ||
1280 | static bool | |
1281 | int_safely_convertible_to_real_p (const_tree from_type, const_tree to_type) | |
1282 | { | |
1283 | tree type_low_bound = TYPE_MIN_VALUE (from_type); | |
1284 | tree type_high_bound = TYPE_MAX_VALUE (from_type); | |
1285 | REAL_VALUE_TYPE real_low_bound = | |
1286 | real_value_from_int_cst (0, type_low_bound); | |
1287 | REAL_VALUE_TYPE real_high_bound = | |
1288 | real_value_from_int_cst (0, type_high_bound); | |
1289 | ||
1290 | return exact_real_truncate (TYPE_MODE (to_type), &real_low_bound) | |
1291 | && exact_real_truncate (TYPE_MODE (to_type), &real_high_bound); | |
1292 | } | |
1293 | ||
1294 | /* Checks if expression EXPR of complex/real/integer type cannot be converted | |
1295 | to the complex/real/integer type TYPE. Function returns non-zero when: | |
22a75734 | 1296 | * EXPR is a constant which cannot be exactly converted to TYPE. |
1297 | * EXPR is not a constant and size of EXPR's type > than size of TYPE, | |
e53013a8 | 1298 | for EXPR type and TYPE being both integers or both real, or both |
1299 | complex. | |
1300 | * EXPR is not a constant of complex type and TYPE is a real or | |
1301 | an integer. | |
22a75734 | 1302 | * EXPR is not a constant of real type and TYPE is an integer. |
1303 | * EXPR is not a constant of integer type which cannot be | |
1304 | exactly converted to real type. | |
e53013a8 | 1305 | |
7dfa155b | 1306 | Function allows conversions between types of different signedness and |
ca9d7d74 | 1307 | can return SAFE_CONVERSION (zero) in that case. Function can produce |
e53013a8 | 1308 | signedness warnings if PRODUCE_WARNS is true. |
1309 | ||
645b0f8d | 1310 | RESULT, when non-null is the result of the conversion. When constant |
1311 | it is included in the text of diagnostics. | |
1312 | ||
e53013a8 | 1313 | Function allows conversions from complex constants to non-complex types, |
1314 | provided that imaginary part is zero and real part can be safely converted | |
1315 | to TYPE. */ | |
22a75734 | 1316 | |
ca9d7d74 | 1317 | enum conversion_safety |
645b0f8d | 1318 | unsafe_conversion_p (location_t loc, tree type, tree expr, tree result, |
1319 | bool produce_warns) | |
d31d55f0 | 1320 | { |
ca9d7d74 | 1321 | enum conversion_safety give_warning = SAFE_CONVERSION; /* is 0 or false */ |
27259707 | 1322 | tree expr_type = TREE_TYPE (expr); |
645b0f8d | 1323 | |
1324 | bool cstresult = (result | |
1325 | && TREE_CODE_CLASS (TREE_CODE (result)) == tcc_constant); | |
1326 | ||
1327 | loc = expansion_point_location_if_in_system_header (loc); | |
d31d55f0 | 1328 | |
d582d140 | 1329 | expr = fold_for_warn (expr); |
1330 | ||
7dfa155b | 1331 | if (TREE_CODE (expr) == REAL_CST || TREE_CODE (expr) == INTEGER_CST) |
5b16c152 | 1332 | { |
e53013a8 | 1333 | /* If type is complex, we are interested in compatibility with |
1334 | underlying type. */ | |
1335 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
1336 | type = TREE_TYPE (type); | |
1337 | ||
d31d55f0 | 1338 | /* Warn for real constant that is not an exact integer converted |
7dfa155b | 1339 | to integer type. */ |
27259707 | 1340 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 1341 | && TREE_CODE (type) == INTEGER_TYPE) |
1342 | { | |
1343 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) | |
ca9d7d74 | 1344 | give_warning = UNSAFE_REAL; |
7dfa155b | 1345 | } |
da1fb07b | 1346 | /* Warn for an integer constant that does not fit into integer type. */ |
27259707 | 1347 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 1348 | && TREE_CODE (type) == INTEGER_TYPE |
1349 | && !int_fits_type_p (expr, type)) | |
1350 | { | |
1351 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) | |
27259707 | 1352 | && tree_int_cst_sgn (expr) < 0) |
7dfa155b | 1353 | { |
1354 | if (produce_warns) | |
645b0f8d | 1355 | { |
1356 | if (cstresult) | |
1357 | warning_at (loc, OPT_Wsign_conversion, | |
1358 | "unsigned conversion from %qT to %qT " | |
1359 | "changes value from %qE to %qE", | |
1360 | expr_type, type, expr, result); | |
1361 | else | |
1362 | warning_at (loc, OPT_Wsign_conversion, | |
1363 | "unsigned conversion from %qT to %qT " | |
1364 | "changes the value of %qE", | |
1365 | expr_type, type, expr); | |
1366 | } | |
7dfa155b | 1367 | } |
1368 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) | |
1369 | { | |
645b0f8d | 1370 | if (cstresult) |
1371 | warning_at (loc, OPT_Wsign_conversion, | |
1372 | "signed conversion from %qT to %qT changes " | |
1373 | "value from %qE to %qE", | |
1374 | expr_type, type, expr, result); | |
1375 | else | |
1376 | warning_at (loc, OPT_Wsign_conversion, | |
1377 | "signed conversion from %qT to %qT changes " | |
1378 | "the value of %qE", | |
1379 | expr_type, type, expr); | |
7dfa155b | 1380 | } |
7ee0d227 | 1381 | else |
ca9d7d74 | 1382 | give_warning = UNSAFE_OTHER; |
7dfa155b | 1383 | } |
d31d55f0 | 1384 | else if (TREE_CODE (type) == REAL_TYPE) |
7dfa155b | 1385 | { |
1386 | /* Warn for an integer constant that does not fit into real type. */ | |
1387 | if (TREE_CODE (expr_type) == INTEGER_TYPE) | |
1388 | { | |
1389 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
1390 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 1391 | give_warning = UNSAFE_REAL; |
7dfa155b | 1392 | } |
1393 | /* Warn for a real constant that does not fit into a smaller | |
1394 | real type. */ | |
1395 | else if (TREE_CODE (expr_type) == REAL_TYPE | |
1396 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
1397 | { | |
1398 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
1399 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
ca9d7d74 | 1400 | give_warning = UNSAFE_REAL; |
7dfa155b | 1401 | } |
1402 | } | |
1403 | } | |
e53013a8 | 1404 | |
1405 | else if (TREE_CODE (expr) == COMPLEX_CST) | |
1406 | { | |
1407 | tree imag_part = TREE_IMAGPART (expr); | |
1408 | /* Conversion from complex constant with zero imaginary part, | |
1409 | perform check for conversion of real part. */ | |
1410 | if ((TREE_CODE (imag_part) == REAL_CST | |
1411 | && real_zerop (imag_part)) | |
1412 | || (TREE_CODE (imag_part) == INTEGER_CST | |
1413 | && integer_zerop (imag_part))) | |
1414 | /* Note: in this branch we use recursive call to unsafe_conversion_p | |
1415 | with different type of EXPR, but it is still safe, because when EXPR | |
1416 | is a constant, it's type is not used in text of generated warnings | |
1417 | (otherwise they could sound misleading). */ | |
645b0f8d | 1418 | return unsafe_conversion_p (loc, type, TREE_REALPART (expr), result, |
e53013a8 | 1419 | produce_warns); |
1420 | /* Conversion from complex constant with non-zero imaginary part. */ | |
1421 | else | |
1422 | { | |
1423 | /* Conversion to complex type. | |
1424 | Perform checks for both real and imaginary parts. */ | |
1425 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
1426 | { | |
1427 | /* Unfortunately, produce_warns must be false in two subsequent | |
1428 | calls of unsafe_conversion_p, because otherwise we could | |
1429 | produce strange "double" warnings, if both real and imaginary | |
1430 | parts have conversion problems related to signedness. | |
1431 | ||
1432 | For example: | |
1433 | int32_t _Complex a = 0x80000000 + 0x80000000i; | |
1434 | ||
1435 | Possible solution: add a separate function for checking | |
1436 | constants and combine result of two calls appropriately. */ | |
1437 | enum conversion_safety re_safety = | |
645b0f8d | 1438 | unsafe_conversion_p (loc, type, TREE_REALPART (expr), |
1439 | result, false); | |
e53013a8 | 1440 | enum conversion_safety im_safety = |
645b0f8d | 1441 | unsafe_conversion_p (loc, type, imag_part, result, false); |
e53013a8 | 1442 | |
1443 | /* Merge the results into appropriate single warning. */ | |
1444 | ||
1445 | /* Note: this case includes SAFE_CONVERSION, i.e. success. */ | |
1446 | if (re_safety == im_safety) | |
1447 | give_warning = re_safety; | |
1448 | else if (!re_safety && im_safety) | |
1449 | give_warning = im_safety; | |
1450 | else if (re_safety && !im_safety) | |
1451 | give_warning = re_safety; | |
1452 | else | |
1453 | give_warning = UNSAFE_OTHER; | |
1454 | } | |
1455 | /* Warn about conversion from complex to real or integer type. */ | |
1456 | else | |
1457 | give_warning = UNSAFE_IMAGINARY; | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | /* Checks for remaining case: EXPR is not constant. */ | |
7dfa155b | 1462 | else |
1463 | { | |
d31d55f0 | 1464 | /* Warn for real types converted to integer types. */ |
2561cea2 | 1465 | if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 1466 | && TREE_CODE (type) == INTEGER_TYPE) |
ca9d7d74 | 1467 | give_warning = UNSAFE_REAL; |
d31d55f0 | 1468 | |
2561cea2 | 1469 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 1470 | && TREE_CODE (type) == INTEGER_TYPE) |
1471 | { | |
69609004 | 1472 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
f9d856a4 | 1473 | expr = get_unwidened (expr, 0); |
2561cea2 | 1474 | expr_type = TREE_TYPE (expr); |
69609004 | 1475 | |
2561cea2 | 1476 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
48e1416a | 1477 | if (TREE_CODE (expr) == BIT_AND_EXPR |
7dfa155b | 1478 | || TREE_CODE (expr) == BIT_IOR_EXPR |
2561cea2 | 1479 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
1480 | { | |
27259707 | 1481 | /* If both args were extended from a shortest type, |
1482 | use that type if that is safe. */ | |
48e1416a | 1483 | expr_type = shorten_binary_op (expr_type, |
1484 | TREE_OPERAND (expr, 0), | |
1485 | TREE_OPERAND (expr, 1), | |
2561cea2 | 1486 | /* bitwise */1); |
1487 | ||
2561cea2 | 1488 | if (TREE_CODE (expr) == BIT_AND_EXPR) |
1489 | { | |
1490 | tree op0 = TREE_OPERAND (expr, 0); | |
1491 | tree op1 = TREE_OPERAND (expr, 1); | |
30de145b | 1492 | bool unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
1493 | bool unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
1494 | ||
1495 | /* If one of the operands is a non-negative constant | |
1496 | that fits in the target type, then the type of the | |
1497 | other operand does not matter. */ | |
2561cea2 | 1498 | if ((TREE_CODE (op0) == INTEGER_CST |
1499 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
1500 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
1501 | || (TREE_CODE (op1) == INTEGER_CST | |
27259707 | 1502 | && int_fits_type_p (op1, c_common_signed_type (type)) |
48e1416a | 1503 | && int_fits_type_p (op1, |
27259707 | 1504 | c_common_unsigned_type (type)))) |
ca9d7d74 | 1505 | return SAFE_CONVERSION; |
30de145b | 1506 | /* If constant is unsigned and fits in the target |
1507 | type, then the result will also fit. */ | |
1508 | else if ((TREE_CODE (op0) == INTEGER_CST | |
48e1416a | 1509 | && unsigned0 |
30de145b | 1510 | && int_fits_type_p (op0, type)) |
1511 | || (TREE_CODE (op1) == INTEGER_CST | |
1512 | && unsigned1 | |
1513 | && int_fits_type_p (op1, type))) | |
ca9d7d74 | 1514 | return SAFE_CONVERSION; |
2561cea2 | 1515 | } |
1516 | } | |
7dfa155b | 1517 | /* Warn for integer types converted to smaller integer types. */ |
48e1416a | 1518 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
ca9d7d74 | 1519 | give_warning = UNSAFE_OTHER; |
7ee0d227 | 1520 | |
1521 | /* When they are the same width but different signedness, | |
1522 | then the value may change. */ | |
7dfa155b | 1523 | else if (((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
2561cea2 | 1524 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7ee0d227 | 1525 | /* Even when converted to a bigger type, if the type is |
1526 | unsigned but expr is signed, then negative values | |
1527 | will be changed. */ | |
7dfa155b | 1528 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
1529 | && produce_warns) | |
200dd99c | 1530 | warning_at (loc, OPT_Wsign_conversion, "conversion to %qT from %qT " |
1531 | "may change the sign of the result", | |
1532 | type, expr_type); | |
7dfa155b | 1533 | } |
d31d55f0 | 1534 | |
1535 | /* Warn for integer types converted to real types if and only if | |
7dfa155b | 1536 | all the range of values of the integer type cannot be |
1537 | represented by the real type. */ | |
2561cea2 | 1538 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
7dfa155b | 1539 | && TREE_CODE (type) == REAL_TYPE) |
1540 | { | |
4c2cfa81 | 1541 | /* Don't warn about char y = 0xff; float x = (int) y; */ |
1542 | expr = get_unwidened (expr, 0); | |
1543 | expr_type = TREE_TYPE (expr); | |
1544 | ||
e53013a8 | 1545 | if (!int_safely_convertible_to_real_p (expr_type, type)) |
ca9d7d74 | 1546 | give_warning = UNSAFE_OTHER; |
7dfa155b | 1547 | } |
d31d55f0 | 1548 | |
1549 | /* Warn for real types converted to smaller real types. */ | |
2561cea2 | 1550 | else if (TREE_CODE (expr_type) == REAL_TYPE |
7dfa155b | 1551 | && TREE_CODE (type) == REAL_TYPE |
1552 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
ca9d7d74 | 1553 | give_warning = UNSAFE_REAL; |
e53013a8 | 1554 | |
1555 | /* Check conversion between two complex types. */ | |
1556 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
1557 | && TREE_CODE (type) == COMPLEX_TYPE) | |
1558 | { | |
1559 | /* Extract underlying types (i.e., type of real and imaginary | |
1560 | parts) of expr_type and type. */ | |
1561 | tree from_type = TREE_TYPE (expr_type); | |
1562 | tree to_type = TREE_TYPE (type); | |
1563 | ||
1564 | /* Warn for real types converted to integer types. */ | |
1565 | if (TREE_CODE (from_type) == REAL_TYPE | |
1566 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
1567 | give_warning = UNSAFE_REAL; | |
1568 | ||
1569 | /* Warn for real types converted to smaller real types. */ | |
1570 | else if (TREE_CODE (from_type) == REAL_TYPE | |
1571 | && TREE_CODE (to_type) == REAL_TYPE | |
1572 | && TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
1573 | give_warning = UNSAFE_REAL; | |
1574 | ||
1575 | /* Check conversion for complex integer types. Here implementation | |
1576 | is simpler than for real-domain integers because it does not | |
1577 | involve sophisticated cases, such as bitmasks, casts, etc. */ | |
1578 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
1579 | && TREE_CODE (to_type) == INTEGER_TYPE) | |
1580 | { | |
1581 | /* Warn for integer types converted to smaller integer types. */ | |
1582 | if (TYPE_PRECISION (to_type) < TYPE_PRECISION (from_type)) | |
1583 | give_warning = UNSAFE_OTHER; | |
1584 | ||
1585 | /* Check for different signedness, see case for real-domain | |
1586 | integers (above) for a more detailed comment. */ | |
1587 | else if (((TYPE_PRECISION (to_type) == TYPE_PRECISION (from_type) | |
1588 | && TYPE_UNSIGNED (to_type) != TYPE_UNSIGNED (from_type)) | |
1589 | || (TYPE_UNSIGNED (to_type) && !TYPE_UNSIGNED (from_type))) | |
1590 | && produce_warns) | |
1591 | warning_at (loc, OPT_Wsign_conversion, | |
1592 | "conversion to %qT from %qT " | |
1593 | "may change the sign of the result", | |
1594 | type, expr_type); | |
1595 | } | |
1596 | else if (TREE_CODE (from_type) == INTEGER_TYPE | |
1597 | && TREE_CODE (to_type) == REAL_TYPE | |
1598 | && !int_safely_convertible_to_real_p (from_type, to_type)) | |
1599 | give_warning = UNSAFE_OTHER; | |
1600 | } | |
1601 | ||
1602 | /* Warn for complex types converted to real or integer types. */ | |
1603 | else if (TREE_CODE (expr_type) == COMPLEX_TYPE | |
1604 | && TREE_CODE (type) != COMPLEX_TYPE) | |
1605 | give_warning = UNSAFE_IMAGINARY; | |
7dfa155b | 1606 | } |
1607 | ||
1608 | return give_warning; | |
1609 | } | |
1610 | ||
59dd8856 | 1611 | |
1612 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
1613 | Invoke this function on every expression that is converted implicitly, | |
1614 | i.e. because of language rules and not because of an explicit cast. */ | |
1615 | ||
1616 | tree | |
22a75734 | 1617 | convert_and_check (location_t loc, tree type, tree expr) |
59dd8856 | 1618 | { |
1619 | tree result; | |
c6418a4e | 1620 | tree expr_for_warning; |
1621 | ||
1622 | /* Convert from a value with possible excess precision rather than | |
1623 | via the semantic type, but do not warn about values not fitting | |
1624 | exactly in the semantic type. */ | |
1625 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
1626 | { | |
1627 | tree orig_type = TREE_TYPE (expr); | |
1628 | expr = TREE_OPERAND (expr, 0); | |
1629 | expr_for_warning = convert (orig_type, expr); | |
1630 | if (orig_type == type) | |
1631 | return expr_for_warning; | |
1632 | } | |
1633 | else | |
1634 | expr_for_warning = expr; | |
59dd8856 | 1635 | |
1636 | if (TREE_TYPE (expr) == type) | |
1637 | return expr; | |
48e1416a | 1638 | |
59dd8856 | 1639 | result = convert (type, expr); |
1640 | ||
48d94ede | 1641 | if (c_inhibit_evaluation_warnings == 0 |
1642 | && !TREE_OVERFLOW_P (expr) | |
1643 | && result != error_mark_node) | |
22a75734 | 1644 | warnings_for_convert_and_check (loc, type, expr_for_warning, result); |
59dd8856 | 1645 | |
da1fb07b | 1646 | return result; |
b2806639 | 1647 | } |
1648 | \f | |
4e91a871 | 1649 | /* A node in a list that describes references to variables (EXPR), which are |
1650 | either read accesses if WRITER is zero, or write accesses, in which case | |
1651 | WRITER is the parent of EXPR. */ | |
1652 | struct tlist | |
1653 | { | |
1654 | struct tlist *next; | |
1655 | tree expr, writer; | |
1656 | }; | |
1657 | ||
1658 | /* Used to implement a cache the results of a call to verify_tree. We only | |
1659 | use this for SAVE_EXPRs. */ | |
1660 | struct tlist_cache | |
1661 | { | |
1662 | struct tlist_cache *next; | |
1663 | struct tlist *cache_before_sp; | |
1664 | struct tlist *cache_after_sp; | |
1665 | tree expr; | |
481c6ce6 | 1666 | }; |
1667 | ||
4e91a871 | 1668 | /* Obstack to use when allocating tlist structures, and corresponding |
1669 | firstobj. */ | |
1670 | static struct obstack tlist_obstack; | |
1671 | static char *tlist_firstobj = 0; | |
1672 | ||
1673 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
1674 | warnings. */ | |
1675 | static struct tlist *warned_ids; | |
1676 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
1677 | cache the results. */ | |
1678 | static struct tlist_cache *save_expr_cache; | |
1679 | ||
1cae46be | 1680 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
1681 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
1682 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
424b2d7d | 1683 | static bool warning_candidate_p (tree); |
79973b57 | 1684 | static bool candidate_equal_p (const_tree, const_tree); |
1cae46be | 1685 | static void warn_for_collisions (struct tlist *); |
1686 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
1687 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
481c6ce6 | 1688 | |
4e91a871 | 1689 | /* Create a new struct tlist and fill in its fields. */ |
1690 | static struct tlist * | |
1cae46be | 1691 | new_tlist (struct tlist *next, tree t, tree writer) |
4e91a871 | 1692 | { |
1693 | struct tlist *l; | |
9318f22c | 1694 | l = XOBNEW (&tlist_obstack, struct tlist); |
4e91a871 | 1695 | l->next = next; |
1696 | l->expr = t; | |
1697 | l->writer = writer; | |
1698 | return l; | |
1699 | } | |
1700 | ||
1701 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
1702 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
1703 | ||
1704 | static void | |
1cae46be | 1705 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
4e91a871 | 1706 | { |
1707 | while (add) | |
1708 | { | |
1709 | struct tlist *next = add->next; | |
84166705 | 1710 | if (!copy) |
4e91a871 | 1711 | add->next = *to; |
79973b57 | 1712 | if (!exclude_writer || !candidate_equal_p (add->writer, exclude_writer)) |
4e91a871 | 1713 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
1714 | add = next; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
1719 | each variable that already exists in TO, no new node is added; however if | |
1720 | there is a write access recorded in ADD, and an occurrence on TO is only | |
1721 | a read access, then the occurrence in TO will be modified to record the | |
1722 | write. */ | |
481c6ce6 | 1723 | |
1724 | static void | |
1cae46be | 1725 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
4e91a871 | 1726 | { |
1727 | struct tlist **end = to; | |
1728 | ||
1729 | while (*end) | |
1730 | end = &(*end)->next; | |
1731 | ||
1732 | while (add) | |
1733 | { | |
1734 | int found = 0; | |
1735 | struct tlist *tmp2; | |
1736 | struct tlist *next = add->next; | |
1737 | ||
1738 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
79973b57 | 1739 | if (candidate_equal_p (tmp2->expr, add->expr)) |
4e91a871 | 1740 | { |
1741 | found = 1; | |
84166705 | 1742 | if (!tmp2->writer) |
4e91a871 | 1743 | tmp2->writer = add->writer; |
1744 | } | |
84166705 | 1745 | if (!found) |
4e91a871 | 1746 | { |
312243bb | 1747 | *end = copy ? new_tlist (NULL, add->expr, add->writer) : add; |
4e91a871 | 1748 | end = &(*end)->next; |
1749 | *end = 0; | |
1750 | } | |
1751 | add = next; | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
1756 | references in list LIST conflict with it, excluding reads if ONLY writers | |
1757 | is nonzero. */ | |
1758 | ||
1759 | static void | |
1cae46be | 1760 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
1761 | int only_writes) | |
4e91a871 | 1762 | { |
1763 | struct tlist *tmp; | |
1764 | ||
1765 | /* Avoid duplicate warnings. */ | |
1766 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
79973b57 | 1767 | if (candidate_equal_p (tmp->expr, written)) |
4e91a871 | 1768 | return; |
1769 | ||
1770 | while (list) | |
1771 | { | |
79973b57 | 1772 | if (candidate_equal_p (list->expr, written) |
1773 | && !candidate_equal_p (list->writer, writer) | |
1774 | && (!only_writes || list->writer)) | |
4e91a871 | 1775 | { |
1776 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
3df42822 | 1777 | warning_at (EXPR_LOC_OR_LOC (writer, input_location), |
6513b50d | 1778 | OPT_Wsequence_point, "operation on %qE may be undefined", |
1779 | list->expr); | |
4e91a871 | 1780 | } |
1781 | list = list->next; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /* Given a list LIST of references to variables, find whether any of these | |
1786 | can cause conflicts due to missing sequence points. */ | |
1787 | ||
1788 | static void | |
1cae46be | 1789 | warn_for_collisions (struct tlist *list) |
4e91a871 | 1790 | { |
1791 | struct tlist *tmp; | |
1cae46be | 1792 | |
4e91a871 | 1793 | for (tmp = list; tmp; tmp = tmp->next) |
1794 | { | |
1795 | if (tmp->writer) | |
1796 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
1797 | } | |
1798 | } | |
1799 | ||
734c98be | 1800 | /* Return nonzero if X is a tree that can be verified by the sequence point |
4e91a871 | 1801 | warnings. */ |
424b2d7d | 1802 | |
1803 | static bool | |
1cae46be | 1804 | warning_candidate_p (tree x) |
481c6ce6 | 1805 | { |
6ef8d12f | 1806 | if (DECL_P (x) && DECL_ARTIFICIAL (x)) |
424b2d7d | 1807 | return false; |
6ef8d12f | 1808 | |
027fc6ef | 1809 | if (TREE_CODE (x) == BLOCK) |
424b2d7d | 1810 | return false; |
027fc6ef | 1811 | |
6ef8d12f | 1812 | /* VOID_TYPE_P (TREE_TYPE (x)) is workaround for cp/tree.c |
79973b57 | 1813 | (lvalue_p) crash on TRY/CATCH. */ |
6ef8d12f | 1814 | if (TREE_TYPE (x) == NULL_TREE || VOID_TYPE_P (TREE_TYPE (x))) |
424b2d7d | 1815 | return false; |
6ef8d12f | 1816 | |
1817 | if (!lvalue_p (x)) | |
424b2d7d | 1818 | return false; |
6ef8d12f | 1819 | |
1820 | /* No point to track non-const calls, they will never satisfy | |
1821 | operand_equal_p. */ | |
1822 | if (TREE_CODE (x) == CALL_EXPR && (call_expr_flags (x) & ECF_CONST) == 0) | |
424b2d7d | 1823 | return false; |
6ef8d12f | 1824 | |
1825 | if (TREE_CODE (x) == STRING_CST) | |
424b2d7d | 1826 | return false; |
6ef8d12f | 1827 | |
424b2d7d | 1828 | return true; |
79973b57 | 1829 | } |
1830 | ||
1831 | /* Return nonzero if X and Y appear to be the same candidate (or NULL) */ | |
1832 | static bool | |
1833 | candidate_equal_p (const_tree x, const_tree y) | |
1834 | { | |
1835 | return (x == y) || (x && y && operand_equal_p (x, y, 0)); | |
4e91a871 | 1836 | } |
481c6ce6 | 1837 | |
4e91a871 | 1838 | /* Walk the tree X, and record accesses to variables. If X is written by the |
1839 | parent tree, WRITER is the parent. | |
1840 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
1841 | expression or its only operand forces a sequence point, then everything up | |
1842 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
1843 | in PNO_SP. | |
1844 | Once we return, we will have emitted warnings if any subexpression before | |
1845 | such a sequence point could be undefined. On a higher level, however, the | |
1846 | sequence point may not be relevant, and we'll merge the two lists. | |
1847 | ||
1848 | Example: (b++, a) + b; | |
1849 | The call that processes the COMPOUND_EXPR will store the increment of B | |
1850 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
1851 | processes the PLUS_EXPR will need to merge the two lists so that | |
1852 | eventually, all accesses end up on the same list (and we'll warn about the | |
1853 | unordered subexpressions b++ and b. | |
1854 | ||
1855 | A note on merging. If we modify the former example so that our expression | |
1856 | becomes | |
1857 | (b++, b) + a | |
1858 | care must be taken not simply to add all three expressions into the final | |
1859 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
1860 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
1861 | way, so that no more than one access to B is recorded. */ | |
481c6ce6 | 1862 | |
4e91a871 | 1863 | static void |
1cae46be | 1864 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
1865 | tree writer) | |
4e91a871 | 1866 | { |
1867 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
1868 | enum tree_code code; | |
ce45a448 | 1869 | enum tree_code_class cl; |
481c6ce6 | 1870 | |
e5b75768 | 1871 | /* X may be NULL if it is the operand of an empty statement expression |
1872 | ({ }). */ | |
1873 | if (x == NULL) | |
1874 | return; | |
1875 | ||
4e91a871 | 1876 | restart: |
1877 | code = TREE_CODE (x); | |
e916c70c | 1878 | cl = TREE_CODE_CLASS (code); |
481c6ce6 | 1879 | |
4e91a871 | 1880 | if (warning_candidate_p (x)) |
79973b57 | 1881 | *pno_sp = new_tlist (*pno_sp, x, writer); |
4e91a871 | 1882 | |
1883 | switch (code) | |
1884 | { | |
67b28e3e | 1885 | case CONSTRUCTOR: |
8e71dad2 | 1886 | case SIZEOF_EXPR: |
67b28e3e | 1887 | return; |
1888 | ||
4e91a871 | 1889 | case COMPOUND_EXPR: |
1890 | case TRUTH_ANDIF_EXPR: | |
1891 | case TRUTH_ORIF_EXPR: | |
176aa551 | 1892 | tmp_before = tmp_nosp = tmp_list2 = tmp_list3 = 0; |
4e91a871 | 1893 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); |
1894 | warn_for_collisions (tmp_nosp); | |
1895 | merge_tlist (pbefore_sp, tmp_before, 0); | |
1896 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
176aa551 | 1897 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_list2, NULL_TREE); |
1898 | warn_for_collisions (tmp_list2); | |
4e91a871 | 1899 | merge_tlist (pbefore_sp, tmp_list3, 0); |
176aa551 | 1900 | merge_tlist (pno_sp, tmp_list2, 0); |
4e91a871 | 1901 | return; |
1902 | ||
1903 | case COND_EXPR: | |
1904 | tmp_before = tmp_list2 = 0; | |
1905 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
1906 | warn_for_collisions (tmp_list2); | |
1907 | merge_tlist (pbefore_sp, tmp_before, 0); | |
312243bb | 1908 | merge_tlist (pbefore_sp, tmp_list2, 0); |
4e91a871 | 1909 | |
1910 | tmp_list3 = tmp_nosp = 0; | |
1911 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
1912 | warn_for_collisions (tmp_nosp); | |
1913 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
1914 | ||
1915 | tmp_list3 = tmp_list2 = 0; | |
1916 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
1917 | warn_for_collisions (tmp_list2); | |
1918 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
1919 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
1920 | two first, to avoid warning for (a ? b++ : b++). */ | |
1921 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
1922 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
1923 | return; | |
1924 | ||
481c6ce6 | 1925 | case PREDECREMENT_EXPR: |
1926 | case PREINCREMENT_EXPR: | |
1927 | case POSTDECREMENT_EXPR: | |
1928 | case POSTINCREMENT_EXPR: | |
4e91a871 | 1929 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
1930 | return; | |
1931 | ||
1932 | case MODIFY_EXPR: | |
1933 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
1934 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
1935 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
1936 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
1937 | in the RHS. Example: | |
1938 | *a = (a++, 2) | |
1939 | Despite the fact that the modification of "a" is in the before_sp | |
1940 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
1941 | We can handle this by adding the contents of tmp_list3 | |
1942 | to those of tmp_before, and redoing the collision warnings for that | |
1943 | list. */ | |
1944 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
1945 | warn_for_collisions (tmp_before); | |
1946 | /* Exclude the LHS itself here; we first have to merge it into the | |
1947 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
1948 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
1949 | as a write. */ | |
1950 | add_tlist (pno_sp, tmp_list3, x, 0); | |
1951 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
1952 | ||
1953 | merge_tlist (pbefore_sp, tmp_before, 0); | |
1954 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
1955 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
1956 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
1957 | return; | |
481c6ce6 | 1958 | |
1959 | case CALL_EXPR: | |
4e91a871 | 1960 | /* We need to warn about conflicts among arguments and conflicts between |
1961 | args and the function address. Side effects of the function address, | |
1962 | however, are not ordered by the sequence point of the call. */ | |
c2f47e15 | 1963 | { |
1964 | call_expr_arg_iterator iter; | |
1965 | tree arg; | |
48e1416a | 1966 | tmp_before = tmp_nosp = 0; |
c2f47e15 | 1967 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); |
1968 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
1969 | { | |
1970 | tmp_list2 = tmp_list3 = 0; | |
1971 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
1972 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
1973 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
1974 | } | |
1975 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
1976 | warn_for_collisions (tmp_before); | |
1977 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
1978 | return; | |
1979 | } | |
481c6ce6 | 1980 | |
1981 | case TREE_LIST: | |
1982 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
1983 | while (x) | |
1984 | { | |
4e91a871 | 1985 | tmp_before = tmp_nosp = 0; |
1986 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
1987 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
1988 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
481c6ce6 | 1989 | x = TREE_CHAIN (x); |
1990 | } | |
4e91a871 | 1991 | return; |
481c6ce6 | 1992 | |
4e91a871 | 1993 | case SAVE_EXPR: |
1994 | { | |
1995 | struct tlist_cache *t; | |
1996 | for (t = save_expr_cache; t; t = t->next) | |
79973b57 | 1997 | if (candidate_equal_p (t->expr, x)) |
4e91a871 | 1998 | break; |
481c6ce6 | 1999 | |
84166705 | 2000 | if (!t) |
481c6ce6 | 2001 | { |
9318f22c | 2002 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
4e91a871 | 2003 | t->next = save_expr_cache; |
2004 | t->expr = x; | |
2005 | save_expr_cache = t; | |
2006 | ||
2007 | tmp_before = tmp_nosp = 0; | |
2008 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
2009 | warn_for_collisions (tmp_nosp); | |
2010 | ||
2011 | tmp_list3 = 0; | |
312243bb | 2012 | merge_tlist (&tmp_list3, tmp_nosp, 0); |
4e91a871 | 2013 | t->cache_before_sp = tmp_before; |
2014 | t->cache_after_sp = tmp_list3; | |
481c6ce6 | 2015 | } |
4e91a871 | 2016 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
2017 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
2018 | return; | |
2019 | } | |
481c6ce6 | 2020 | |
012916cb | 2021 | case ADDR_EXPR: |
2022 | x = TREE_OPERAND (x, 0); | |
2023 | if (DECL_P (x)) | |
2024 | return; | |
2025 | writer = 0; | |
2026 | goto restart; | |
2027 | ||
d582d140 | 2028 | case VIEW_CONVERT_EXPR: |
2029 | if (location_wrapper_p (x)) | |
2030 | { | |
2031 | x = TREE_OPERAND (x, 0); | |
2032 | goto restart; | |
2033 | } | |
2034 | gcc_fallthrough (); | |
ce45a448 | 2035 | default: |
2036 | /* For other expressions, simply recurse on their operands. | |
a0c938f0 | 2037 | Manual tail recursion for unary expressions. |
ce45a448 | 2038 | Other non-expressions need not be processed. */ |
2039 | if (cl == tcc_unary) | |
2040 | { | |
ce45a448 | 2041 | x = TREE_OPERAND (x, 0); |
2042 | writer = 0; | |
2043 | goto restart; | |
2044 | } | |
2045 | else if (IS_EXPR_CODE_CLASS (cl)) | |
2046 | { | |
2047 | int lp; | |
c2f47e15 | 2048 | int max = TREE_OPERAND_LENGTH (x); |
ce45a448 | 2049 | for (lp = 0; lp < max; lp++) |
2050 | { | |
2051 | tmp_before = tmp_nosp = 0; | |
2052 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
2053 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
2054 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2055 | } | |
2056 | } | |
2057 | return; | |
481c6ce6 | 2058 | } |
481c6ce6 | 2059 | } |
2060 | ||
974e2c0c | 2061 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
481c6ce6 | 2062 | points. */ |
2063 | ||
4b987fac | 2064 | DEBUG_FUNCTION void |
1cae46be | 2065 | verify_sequence_points (tree expr) |
481c6ce6 | 2066 | { |
4e91a871 | 2067 | struct tlist *before_sp = 0, *after_sp = 0; |
481c6ce6 | 2068 | |
4e91a871 | 2069 | warned_ids = 0; |
2070 | save_expr_cache = 0; | |
2071 | if (tlist_firstobj == 0) | |
481c6ce6 | 2072 | { |
4e91a871 | 2073 | gcc_obstack_init (&tlist_obstack); |
4fd61bc6 | 2074 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
481c6ce6 | 2075 | } |
2076 | ||
4e91a871 | 2077 | verify_tree (expr, &before_sp, &after_sp, 0); |
2078 | warn_for_collisions (after_sp); | |
2079 | obstack_free (&tlist_obstack, tlist_firstobj); | |
481c6ce6 | 2080 | } |
b0fc3e72 | 2081 | \f |
2082 | /* Validate the expression after `case' and apply default promotions. */ | |
2083 | ||
2ca392fd | 2084 | static tree |
2d2f6a15 | 2085 | check_case_value (location_t loc, tree value) |
b0fc3e72 | 2086 | { |
2087 | if (value == NULL_TREE) | |
2088 | return value; | |
2089 | ||
b96dc121 | 2090 | if (TREE_CODE (value) == INTEGER_CST) |
2091 | /* Promote char or short to int. */ | |
2092 | value = perform_integral_promotions (value); | |
2093 | else if (value != error_mark_node) | |
b0fc3e72 | 2094 | { |
2d2f6a15 | 2095 | error_at (loc, "case label does not reduce to an integer constant"); |
b0fc3e72 | 2096 | value = error_mark_node; |
2097 | } | |
b0fc3e72 | 2098 | |
6433f1c2 | 2099 | constant_expression_warning (value); |
2100 | ||
b0fc3e72 | 2101 | return value; |
2102 | } | |
2103 | \f | |
2104 | /* Return an integer type with BITS bits of precision, | |
2105 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
2106 | ||
2107 | tree | |
1cae46be | 2108 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b0fc3e72 | 2109 | { |
9f75f026 | 2110 | int i; |
2111 | ||
46375237 | 2112 | if (bits == TYPE_PRECISION (integer_type_node)) |
2113 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2114 | ||
bacde65a | 2115 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b0fc3e72 | 2116 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
2117 | ||
bacde65a | 2118 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b0fc3e72 | 2119 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
2120 | ||
bacde65a | 2121 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b0fc3e72 | 2122 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
2123 | ||
bacde65a | 2124 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b0fc3e72 | 2125 | return (unsignedp ? long_long_unsigned_type_node |
2126 | : long_long_integer_type_node); | |
2127 | ||
9f75f026 | 2128 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
2129 | if (int_n_enabled_p[i] | |
2130 | && bits == int_n_data[i].bitsize) | |
2131 | return (unsignedp ? int_n_trees[i].unsigned_type | |
2132 | : int_n_trees[i].signed_type); | |
6388cfe2 | 2133 | |
f57fa2ea | 2134 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
2135 | return (unsignedp ? widest_unsigned_literal_type_node | |
2136 | : widest_integer_literal_type_node); | |
2137 | ||
bacde65a | 2138 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
2139 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2140 | ||
2141 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
2142 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2143 | ||
2144 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
2145 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2146 | ||
2147 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
2148 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2149 | ||
78173203 | 2150 | return NULL_TREE; |
b0fc3e72 | 2151 | } |
2152 | ||
9421ebb9 | 2153 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
2154 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
2155 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
2156 | ||
2157 | tree | |
2158 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
2159 | int unsignedp, int satp) | |
2160 | { | |
19a4dce4 | 2161 | enum mode_class mclass; |
9421ebb9 | 2162 | if (ibit == 0) |
19a4dce4 | 2163 | mclass = unsignedp ? MODE_UFRACT : MODE_FRACT; |
9421ebb9 | 2164 | else |
19a4dce4 | 2165 | mclass = unsignedp ? MODE_UACCUM : MODE_ACCUM; |
9421ebb9 | 2166 | |
2b8f5b8a | 2167 | opt_scalar_mode opt_mode; |
2168 | scalar_mode mode; | |
2169 | FOR_EACH_MODE_IN_CLASS (opt_mode, mclass) | |
2170 | { | |
2171 | mode = opt_mode.require (); | |
2172 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
2173 | break; | |
2174 | } | |
9421ebb9 | 2175 | |
2b8f5b8a | 2176 | if (!opt_mode.exists (&mode) || !targetm.scalar_mode_supported_p (mode)) |
9421ebb9 | 2177 | { |
2178 | sorry ("GCC cannot support operators with integer types and " | |
2179 | "fixed-point types that have too many integral and " | |
2180 | "fractional bits together"); | |
78173203 | 2181 | return NULL_TREE; |
9421ebb9 | 2182 | } |
2183 | ||
2184 | return c_common_type_for_mode (mode, satp); | |
2185 | } | |
2186 | ||
5b247e9f | 2187 | /* Used for communication between c_common_type_for_mode and |
2188 | c_register_builtin_type. */ | |
c1917557 | 2189 | tree registered_builtin_types; |
5b247e9f | 2190 | |
b0fc3e72 | 2191 | /* Return a data type that has machine mode MODE. |
2192 | If the mode is an integer, | |
9421ebb9 | 2193 | then UNSIGNEDP selects between signed and unsigned types. |
2194 | If the mode is a fixed-point mode, | |
2195 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b0fc3e72 | 2196 | |
2197 | tree | |
3754d046 | 2198 | c_common_type_for_mode (machine_mode mode, int unsignedp) |
b0fc3e72 | 2199 | { |
5b247e9f | 2200 | tree t; |
9f75f026 | 2201 | int i; |
5b247e9f | 2202 | |
46375237 | 2203 | if (mode == TYPE_MODE (integer_type_node)) |
2204 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2205 | ||
b0fc3e72 | 2206 | if (mode == TYPE_MODE (signed_char_type_node)) |
2207 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2208 | ||
2209 | if (mode == TYPE_MODE (short_integer_type_node)) | |
2210 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2211 | ||
b0fc3e72 | 2212 | if (mode == TYPE_MODE (long_integer_type_node)) |
2213 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2214 | ||
2215 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
2216 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2217 | ||
9f75f026 | 2218 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
2219 | if (int_n_enabled_p[i] | |
2220 | && mode == int_n_data[i].m) | |
2221 | return (unsignedp ? int_n_trees[i].unsigned_type | |
2222 | : int_n_trees[i].signed_type); | |
6388cfe2 | 2223 | |
88ae7f04 | 2224 | if (mode == QImode) |
bacde65a | 2225 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
2226 | ||
88ae7f04 | 2227 | if (mode == HImode) |
bacde65a | 2228 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
2229 | ||
88ae7f04 | 2230 | if (mode == SImode) |
bacde65a | 2231 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
2232 | ||
88ae7f04 | 2233 | if (mode == DImode) |
bacde65a | 2234 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
ab2c1de8 | 2235 | |
cc1cc1c7 | 2236 | #if HOST_BITS_PER_WIDE_INT >= 64 |
6274009c | 2237 | if (mode == TYPE_MODE (intTI_type_node)) |
2238 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
cc1cc1c7 | 2239 | #endif |
6274009c | 2240 | |
b0fc3e72 | 2241 | if (mode == TYPE_MODE (float_type_node)) |
2242 | return float_type_node; | |
2243 | ||
2244 | if (mode == TYPE_MODE (double_type_node)) | |
2245 | return double_type_node; | |
2246 | ||
2247 | if (mode == TYPE_MODE (long_double_type_node)) | |
2248 | return long_double_type_node; | |
2249 | ||
82c85aba | 2250 | for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) |
2251 | if (FLOATN_NX_TYPE_NODE (i) != NULL_TREE | |
2252 | && mode == TYPE_MODE (FLOATN_NX_TYPE_NODE (i))) | |
2253 | return FLOATN_NX_TYPE_NODE (i); | |
2254 | ||
545c2bde | 2255 | if (mode == TYPE_MODE (void_type_node)) |
2256 | return void_type_node; | |
b27ac6b5 | 2257 | |
7a6aeeed | 2258 | if (mode == TYPE_MODE (build_pointer_type (char_type_node)) |
2259 | || mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
2260 | { | |
2261 | unsigned int precision | |
2262 | = GET_MODE_PRECISION (as_a <scalar_int_mode> (mode)); | |
2263 | return (unsignedp | |
2264 | ? make_unsigned_type (precision) | |
2265 | : make_signed_type (precision)); | |
2266 | } | |
b0fc3e72 | 2267 | |
0dfc45b5 | 2268 | if (COMPLEX_MODE_P (mode)) |
2269 | { | |
3754d046 | 2270 | machine_mode inner_mode; |
0dfc45b5 | 2271 | tree inner_type; |
2272 | ||
2273 | if (mode == TYPE_MODE (complex_float_type_node)) | |
2274 | return complex_float_type_node; | |
2275 | if (mode == TYPE_MODE (complex_double_type_node)) | |
2276 | return complex_double_type_node; | |
2277 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
2278 | return complex_long_double_type_node; | |
2279 | ||
82c85aba | 2280 | for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) |
2281 | if (COMPLEX_FLOATN_NX_TYPE_NODE (i) != NULL_TREE | |
2282 | && mode == TYPE_MODE (COMPLEX_FLOATN_NX_TYPE_NODE (i))) | |
2283 | return COMPLEX_FLOATN_NX_TYPE_NODE (i); | |
2284 | ||
0dfc45b5 | 2285 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) |
2286 | return complex_integer_type_node; | |
2287 | ||
2288 | inner_mode = GET_MODE_INNER (mode); | |
2289 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2290 | if (inner_type != NULL_TREE) | |
2291 | return build_complex_type (inner_type); | |
2292 | } | |
8464736b | 2293 | else if (GET_MODE_CLASS (mode) == MODE_VECTOR_BOOL |
2294 | && valid_vector_subparts_p (GET_MODE_NUNITS (mode))) | |
2295 | { | |
2296 | unsigned int elem_bits = vector_element_size (GET_MODE_BITSIZE (mode), | |
2297 | GET_MODE_NUNITS (mode)); | |
2298 | tree bool_type = build_nonstandard_boolean_type (elem_bits); | |
2299 | return build_vector_type_for_mode (bool_type, mode); | |
2300 | } | |
f08ee65f | 2301 | else if (VECTOR_MODE_P (mode) |
2302 | && valid_vector_subparts_p (GET_MODE_NUNITS (mode))) | |
4917c376 | 2303 | { |
3754d046 | 2304 | machine_mode inner_mode = GET_MODE_INNER (mode); |
4917c376 | 2305 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); |
2306 | if (inner_type != NULL_TREE) | |
2307 | return build_vector_type_for_mode (inner_type, mode); | |
88ae7f04 | 2308 | } |
e2ea7e3a | 2309 | |
c4503c0a | 2310 | if (mode == TYPE_MODE (dfloat32_type_node)) |
2311 | return dfloat32_type_node; | |
2312 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
2313 | return dfloat64_type_node; | |
2314 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
2315 | return dfloat128_type_node; | |
2316 | ||
9421ebb9 | 2317 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
2318 | { | |
2319 | if (mode == TYPE_MODE (short_fract_type_node)) | |
2320 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
2321 | if (mode == TYPE_MODE (fract_type_node)) | |
2322 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
2323 | if (mode == TYPE_MODE (long_fract_type_node)) | |
2324 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
2325 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
2326 | return unsignedp ? sat_long_long_fract_type_node | |
2327 | : long_long_fract_type_node; | |
2328 | ||
2329 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
2330 | return unsignedp ? sat_unsigned_short_fract_type_node | |
2331 | : unsigned_short_fract_type_node; | |
2332 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
2333 | return unsignedp ? sat_unsigned_fract_type_node | |
2334 | : unsigned_fract_type_node; | |
2335 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
2336 | return unsignedp ? sat_unsigned_long_fract_type_node | |
2337 | : unsigned_long_fract_type_node; | |
2338 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
2339 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
2340 | : unsigned_long_long_fract_type_node; | |
2341 | ||
2342 | if (mode == TYPE_MODE (short_accum_type_node)) | |
2343 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
2344 | if (mode == TYPE_MODE (accum_type_node)) | |
2345 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
2346 | if (mode == TYPE_MODE (long_accum_type_node)) | |
2347 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
2348 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
2349 | return unsignedp ? sat_long_long_accum_type_node | |
2350 | : long_long_accum_type_node; | |
2351 | ||
2352 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
2353 | return unsignedp ? sat_unsigned_short_accum_type_node | |
2354 | : unsigned_short_accum_type_node; | |
2355 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
2356 | return unsignedp ? sat_unsigned_accum_type_node | |
2357 | : unsigned_accum_type_node; | |
2358 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
2359 | return unsignedp ? sat_unsigned_long_accum_type_node | |
2360 | : unsigned_long_accum_type_node; | |
2361 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
2362 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
2363 | : unsigned_long_long_accum_type_node; | |
2364 | ||
2365 | if (mode == QQmode) | |
2366 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
2367 | if (mode == HQmode) | |
2368 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
2369 | if (mode == SQmode) | |
2370 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
2371 | if (mode == DQmode) | |
2372 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
2373 | if (mode == TQmode) | |
2374 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
2375 | ||
2376 | if (mode == UQQmode) | |
2377 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
2378 | if (mode == UHQmode) | |
2379 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
2380 | if (mode == USQmode) | |
2381 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
2382 | if (mode == UDQmode) | |
2383 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
2384 | if (mode == UTQmode) | |
2385 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
2386 | ||
2387 | if (mode == HAmode) | |
2388 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
2389 | if (mode == SAmode) | |
2390 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
2391 | if (mode == DAmode) | |
2392 | return unsignedp ? sat_da_type_node : da_type_node; | |
2393 | if (mode == TAmode) | |
2394 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
2395 | ||
2396 | if (mode == UHAmode) | |
2397 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
2398 | if (mode == USAmode) | |
2399 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
2400 | if (mode == UDAmode) | |
2401 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
2402 | if (mode == UTAmode) | |
2403 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
2404 | } | |
2405 | ||
5b247e9f | 2406 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
baec58e1 | 2407 | if (TYPE_MODE (TREE_VALUE (t)) == mode |
2408 | && !!unsignedp == !!TYPE_UNSIGNED (TREE_VALUE (t))) | |
5b247e9f | 2409 | return TREE_VALUE (t); |
2410 | ||
78173203 | 2411 | return NULL_TREE; |
b0fc3e72 | 2412 | } |
20d39783 | 2413 | |
11773141 | 2414 | tree |
2415 | c_common_unsigned_type (tree type) | |
2416 | { | |
2417 | return c_common_signed_or_unsigned_type (1, type); | |
2418 | } | |
2419 | ||
20d39783 | 2420 | /* Return a signed type the same as TYPE in other respects. */ |
2421 | ||
2422 | tree | |
1cae46be | 2423 | c_common_signed_type (tree type) |
20d39783 | 2424 | { |
4070745f | 2425 | return c_common_signed_or_unsigned_type (0, type); |
20d39783 | 2426 | } |
2427 | ||
2428 | /* Return a type the same as TYPE except unsigned or | |
2429 | signed according to UNSIGNEDP. */ | |
2430 | ||
2431 | tree | |
1cae46be | 2432 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
20d39783 | 2433 | { |
7a91101f | 2434 | tree type1; |
9f75f026 | 2435 | int i; |
20d39783 | 2436 | |
7a91101f | 2437 | /* This block of code emulates the behavior of the old |
2438 | c_common_unsigned_type. In particular, it returns | |
2439 | long_unsigned_type_node if passed a long, even when a int would | |
2440 | have the same size. This is necessary for warnings to work | |
2441 | correctly in archs where sizeof(int) == sizeof(long) */ | |
2442 | ||
2443 | type1 = TYPE_MAIN_VARIANT (type); | |
2444 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
2445 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2446 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
2447 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2448 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
2449 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2450 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
2451 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2452 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
2453 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
9f75f026 | 2454 | |
2455 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
2456 | if (int_n_enabled_p[i] | |
2457 | && (type1 == int_n_trees[i].unsigned_type | |
2458 | || type1 == int_n_trees[i].signed_type)) | |
2459 | return (unsignedp ? int_n_trees[i].unsigned_type | |
2460 | : int_n_trees[i].signed_type); | |
2461 | ||
7a91101f | 2462 | #if HOST_BITS_PER_WIDE_INT >= 64 |
2463 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
2464 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
2465 | #endif | |
2466 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
2467 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2468 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
2469 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2470 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
2471 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2472 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
2473 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2474 | ||
9f92e1a2 | 2475 | #define C_COMMON_FIXED_TYPES(NAME) \ |
2476 | if (type1 == short_ ## NAME ## _type_node \ | |
2477 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
2478 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
2479 | : short_ ## NAME ## _type_node; \ | |
2480 | if (type1 == NAME ## _type_node \ | |
2481 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
2482 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
2483 | : NAME ## _type_node; \ | |
2484 | if (type1 == long_ ## NAME ## _type_node \ | |
2485 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
2486 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
2487 | : long_ ## NAME ## _type_node; \ | |
2488 | if (type1 == long_long_ ## NAME ## _type_node \ | |
2489 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
2490 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
2491 | : long_long_ ## NAME ## _type_node; | |
2492 | ||
2493 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
2494 | if (type1 == NAME ## _type_node \ | |
2495 | || type1 == u ## NAME ## _type_node) \ | |
2496 | return unsignedp ? u ## NAME ## _type_node \ | |
2497 | : NAME ## _type_node; | |
2498 | ||
2499 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
2500 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
2501 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
2502 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
2503 | : sat_ ## short_ ## NAME ## _type_node; \ | |
2504 | if (type1 == sat_ ## NAME ## _type_node \ | |
2505 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
2506 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
2507 | : sat_ ## NAME ## _type_node; \ | |
2508 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
2509 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
2510 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
2511 | : sat_ ## long_ ## NAME ## _type_node; \ | |
2512 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
2513 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
2514 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
2515 | : sat_ ## long_long_ ## NAME ## _type_node; | |
2516 | ||
2517 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
2518 | if (type1 == sat_ ## NAME ## _type_node \ | |
2519 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
2520 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
2521 | : sat_ ## NAME ## _type_node; | |
2522 | ||
2523 | C_COMMON_FIXED_TYPES (fract); | |
2524 | C_COMMON_FIXED_TYPES_SAT (fract); | |
2525 | C_COMMON_FIXED_TYPES (accum); | |
2526 | C_COMMON_FIXED_TYPES_SAT (accum); | |
2527 | ||
2528 | C_COMMON_FIXED_MODE_TYPES (qq); | |
2529 | C_COMMON_FIXED_MODE_TYPES (hq); | |
2530 | C_COMMON_FIXED_MODE_TYPES (sq); | |
2531 | C_COMMON_FIXED_MODE_TYPES (dq); | |
2532 | C_COMMON_FIXED_MODE_TYPES (tq); | |
2533 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
2534 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
2535 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
2536 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
2537 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
2538 | C_COMMON_FIXED_MODE_TYPES (ha); | |
2539 | C_COMMON_FIXED_MODE_TYPES (sa); | |
2540 | C_COMMON_FIXED_MODE_TYPES (da); | |
2541 | C_COMMON_FIXED_MODE_TYPES (ta); | |
2542 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
2543 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
2544 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
2545 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
9421ebb9 | 2546 | |
4f7f7efd | 2547 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
2548 | the precision; they have precision set to match their range, but | |
2549 | may use a wider mode to match an ABI. If we change modes, we may | |
2550 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
2551 | the precision as well, so as to yield correct results for | |
2552 | bit-field types. C++ does not have these separate bit-field | |
2553 | types, and producing a signed or unsigned variant of an | |
2554 | ENUMERAL_TYPE may cause other problems as well. */ | |
2555 | ||
ac265864 | 2556 | if (!INTEGRAL_TYPE_P (type) |
2557 | || TYPE_UNSIGNED (type) == unsignedp) | |
2558 | return type; | |
2559 | ||
4f7f7efd | 2560 | #define TYPE_OK(node) \ |
2561 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
0c4abe5b | 2562 | && TYPE_PRECISION (type) == TYPE_PRECISION (node)) |
4f7f7efd | 2563 | if (TYPE_OK (signed_char_type_node)) |
20d39783 | 2564 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
4f7f7efd | 2565 | if (TYPE_OK (integer_type_node)) |
20d39783 | 2566 | return unsignedp ? unsigned_type_node : integer_type_node; |
4f7f7efd | 2567 | if (TYPE_OK (short_integer_type_node)) |
20d39783 | 2568 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
4f7f7efd | 2569 | if (TYPE_OK (long_integer_type_node)) |
20d39783 | 2570 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
4f7f7efd | 2571 | if (TYPE_OK (long_long_integer_type_node)) |
20d39783 | 2572 | return (unsignedp ? long_long_unsigned_type_node |
2573 | : long_long_integer_type_node); | |
9f75f026 | 2574 | |
2575 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
2576 | if (int_n_enabled_p[i] | |
2577 | && TYPE_MODE (type) == int_n_data[i].m | |
2578 | && TYPE_PRECISION (type) == int_n_data[i].bitsize) | |
2579 | return (unsignedp ? int_n_trees[i].unsigned_type | |
2580 | : int_n_trees[i].signed_type); | |
2581 | ||
ef11801e | 2582 | #if HOST_BITS_PER_WIDE_INT >= 64 |
4f7f7efd | 2583 | if (TYPE_OK (intTI_type_node)) |
ef11801e | 2584 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
2585 | #endif | |
4f7f7efd | 2586 | if (TYPE_OK (intDI_type_node)) |
ef11801e | 2587 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
4f7f7efd | 2588 | if (TYPE_OK (intSI_type_node)) |
ef11801e | 2589 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
4f7f7efd | 2590 | if (TYPE_OK (intHI_type_node)) |
ef11801e | 2591 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
4f7f7efd | 2592 | if (TYPE_OK (intQI_type_node)) |
ef11801e | 2593 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
4f7f7efd | 2594 | #undef TYPE_OK |
ef11801e | 2595 | |
0c4abe5b | 2596 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); |
20d39783 | 2597 | } |
b268e47e | 2598 | |
c0e47fd4 | 2599 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
2600 | ||
2601 | tree | |
2602 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
2603 | { | |
9f75f026 | 2604 | int i; |
2605 | ||
c0e47fd4 | 2606 | /* Extended integer types of the same width as a standard type have |
2607 | lesser rank, so those of the same width as int promote to int or | |
2608 | unsigned int and are valid for printf formats expecting int or | |
2609 | unsigned int. To avoid such special cases, avoid creating | |
2610 | extended integer types for bit-fields if a standard integer type | |
2611 | is available. */ | |
2612 | if (width == TYPE_PRECISION (integer_type_node)) | |
2613 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2614 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
2615 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2616 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
2617 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2618 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
2619 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2620 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
2621 | return (unsignedp ? long_long_unsigned_type_node | |
2622 | : long_long_integer_type_node); | |
9f75f026 | 2623 | for (i = 0; i < NUM_INT_N_ENTS; i ++) |
2624 | if (int_n_enabled_p[i] | |
2625 | && width == int_n_data[i].bitsize) | |
2626 | return (unsignedp ? int_n_trees[i].unsigned_type | |
2627 | : int_n_trees[i].signed_type); | |
c0e47fd4 | 2628 | return build_nonstandard_integer_type (width, unsignedp); |
2629 | } | |
2630 | ||
b268e47e | 2631 | /* The C version of the register_builtin_type langhook. */ |
2632 | ||
2633 | void | |
2634 | c_register_builtin_type (tree type, const char* name) | |
2635 | { | |
2636 | tree decl; | |
2637 | ||
e60a6f7b | 2638 | decl = build_decl (UNKNOWN_LOCATION, |
2639 | TYPE_DECL, get_identifier (name), type); | |
b268e47e | 2640 | DECL_ARTIFICIAL (decl) = 1; |
2641 | if (!TYPE_NAME (type)) | |
2642 | TYPE_NAME (type) = decl; | |
cdf05a3f | 2643 | lang_hooks.decls.pushdecl (decl); |
5b247e9f | 2644 | |
2645 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
b268e47e | 2646 | } |
a9b9d10c | 2647 | \f |
aff9e656 | 2648 | /* Print an error message for invalid operands to arith operation |
8e70fb09 | 2649 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. |
c0bf500c | 2650 | RICHLOC is a rich location for the message, containing either |
2651 | three separate locations for each of the operator and operands | |
2652 | ||
2653 | lhs op rhs | |
2654 | ~~~ ^~ ~~~ | |
2655 | ||
2656 | (C FE), or one location ranging over all over them | |
2657 | ||
2658 | lhs op rhs | |
2659 | ~~~~^~~~~~ | |
2660 | ||
2661 | (C++ FE). */ | |
b0fc3e72 | 2662 | |
2663 | void | |
c0bf500c | 2664 | binary_op_error (rich_location *richloc, enum tree_code code, |
8e70fb09 | 2665 | tree type0, tree type1) |
b0fc3e72 | 2666 | { |
19cb6b50 | 2667 | const char *opname; |
f03946e4 | 2668 | |
b0fc3e72 | 2669 | switch (code) |
2670 | { | |
b0fc3e72 | 2671 | case PLUS_EXPR: |
2672 | opname = "+"; break; | |
2673 | case MINUS_EXPR: | |
2674 | opname = "-"; break; | |
2675 | case MULT_EXPR: | |
2676 | opname = "*"; break; | |
2677 | case MAX_EXPR: | |
2678 | opname = "max"; break; | |
2679 | case MIN_EXPR: | |
2680 | opname = "min"; break; | |
2681 | case EQ_EXPR: | |
2682 | opname = "=="; break; | |
2683 | case NE_EXPR: | |
2684 | opname = "!="; break; | |
2685 | case LE_EXPR: | |
2686 | opname = "<="; break; | |
2687 | case GE_EXPR: | |
2688 | opname = ">="; break; | |
2689 | case LT_EXPR: | |
2690 | opname = "<"; break; | |
2691 | case GT_EXPR: | |
2692 | opname = ">"; break; | |
2693 | case LSHIFT_EXPR: | |
2694 | opname = "<<"; break; | |
2695 | case RSHIFT_EXPR: | |
2696 | opname = ">>"; break; | |
2697 | case TRUNC_MOD_EXPR: | |
66618a1e | 2698 | case FLOOR_MOD_EXPR: |
b0fc3e72 | 2699 | opname = "%"; break; |
2700 | case TRUNC_DIV_EXPR: | |
66618a1e | 2701 | case FLOOR_DIV_EXPR: |
b0fc3e72 | 2702 | opname = "/"; break; |
2703 | case BIT_AND_EXPR: | |
2704 | opname = "&"; break; | |
2705 | case BIT_IOR_EXPR: | |
2706 | opname = "|"; break; | |
2707 | case TRUTH_ANDIF_EXPR: | |
2708 | opname = "&&"; break; | |
2709 | case TRUTH_ORIF_EXPR: | |
2710 | opname = "||"; break; | |
2711 | case BIT_XOR_EXPR: | |
2712 | opname = "^"; break; | |
31f820d2 | 2713 | default: |
315ba355 | 2714 | gcc_unreachable (); |
b0fc3e72 | 2715 | } |
3b6578b3 | 2716 | error_at (richloc, |
2717 | "invalid operands to binary %s (have %qT and %qT)", | |
2718 | opname, type0, type1); | |
b0fc3e72 | 2719 | } |
2720 | \f | |
03fe1dc2 | 2721 | /* Given an expression as a tree, return its original type. Do this |
2722 | by stripping any conversion that preserves the sign and precision. */ | |
2723 | static tree | |
2724 | expr_original_type (tree expr) | |
2725 | { | |
2726 | STRIP_SIGN_NOPS (expr); | |
2727 | return TREE_TYPE (expr); | |
2728 | } | |
2729 | ||
b0fc3e72 | 2730 | /* Subroutine of build_binary_op, used for comparison operations. |
2731 | See if the operands have both been converted from subword integer types | |
2732 | and, if so, perhaps change them both back to their original type. | |
5b511807 | 2733 | This function is also responsible for converting the two operands |
2734 | to the proper common type for comparison. | |
b0fc3e72 | 2735 | |
2736 | The arguments of this function are all pointers to local variables | |
2737 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
2738 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
2739 | ||
2623625f | 2740 | LOC is the location of the comparison. |
2741 | ||
78173203 | 2742 | If this function returns non-NULL_TREE, it means that the comparison has |
b0fc3e72 | 2743 | a constant value. What this function returns is an expression for |
2744 | that value. */ | |
2745 | ||
2746 | tree | |
2623625f | 2747 | shorten_compare (location_t loc, tree *op0_ptr, tree *op1_ptr, |
2748 | tree *restype_ptr, enum tree_code *rescode_ptr) | |
b0fc3e72 | 2749 | { |
19cb6b50 | 2750 | tree type; |
b0fc3e72 | 2751 | tree op0 = *op0_ptr; |
2752 | tree op1 = *op1_ptr; | |
2753 | int unsignedp0, unsignedp1; | |
2754 | int real1, real2; | |
2755 | tree primop0, primop1; | |
2756 | enum tree_code code = *rescode_ptr; | |
2757 | ||
2758 | /* Throw away any conversions to wider types | |
2759 | already present in the operands. */ | |
2760 | ||
7f506bca | 2761 | primop0 = c_common_get_narrower (op0, &unsignedp0); |
2762 | primop1 = c_common_get_narrower (op1, &unsignedp1); | |
b0fc3e72 | 2763 | |
119d06b2 | 2764 | /* If primopN is first sign-extended from primopN's precision to opN's |
2765 | precision, then zero-extended from opN's precision to | |
2766 | *restype_ptr precision, shortenings might be invalid. */ | |
2767 | if (TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (TREE_TYPE (op0)) | |
2768 | && TYPE_PRECISION (TREE_TYPE (op0)) < TYPE_PRECISION (*restype_ptr) | |
2769 | && !unsignedp0 | |
2770 | && TYPE_UNSIGNED (TREE_TYPE (op0))) | |
2771 | primop0 = op0; | |
2772 | if (TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (TREE_TYPE (op1)) | |
2773 | && TYPE_PRECISION (TREE_TYPE (op1)) < TYPE_PRECISION (*restype_ptr) | |
2774 | && !unsignedp1 | |
2775 | && TYPE_UNSIGNED (TREE_TYPE (op1))) | |
2776 | primop1 = op1; | |
2777 | ||
b0fc3e72 | 2778 | /* Handle the case that OP0 does not *contain* a conversion |
2779 | but it *requires* conversion to FINAL_TYPE. */ | |
2780 | ||
2781 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
78a8ed03 | 2782 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b0fc3e72 | 2783 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
78a8ed03 | 2784 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b0fc3e72 | 2785 | |
2786 | /* If one of the operands must be floated, we cannot optimize. */ | |
2787 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
2788 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
ab2c1de8 | 2789 | |
b0fc3e72 | 2790 | /* If first arg is constant, swap the args (changing operation |
2bd278cc | 2791 | so value is preserved), for canonicalization. Don't do this if |
2792 | the second arg is 0. */ | |
b0fc3e72 | 2793 | |
2bd278cc | 2794 | if (TREE_CONSTANT (primop0) |
9421ebb9 | 2795 | && !integer_zerop (primop1) && !real_zerop (primop1) |
2796 | && !fixed_zerop (primop1)) | |
b0fc3e72 | 2797 | { |
dfcf26a5 | 2798 | std::swap (primop0, primop1); |
2799 | std::swap (op0, op1); | |
b0fc3e72 | 2800 | *op0_ptr = op0; |
2801 | *op1_ptr = op1; | |
dfcf26a5 | 2802 | std::swap (unsignedp0, unsignedp1); |
2803 | std::swap (real1, real2); | |
b0fc3e72 | 2804 | |
2805 | switch (code) | |
2806 | { | |
2807 | case LT_EXPR: | |
2808 | code = GT_EXPR; | |
2809 | break; | |
2810 | case GT_EXPR: | |
2811 | code = LT_EXPR; | |
2812 | break; | |
2813 | case LE_EXPR: | |
2814 | code = GE_EXPR; | |
2815 | break; | |
2816 | case GE_EXPR: | |
2817 | code = LE_EXPR; | |
2818 | break; | |
31f820d2 | 2819 | default: |
2820 | break; | |
b0fc3e72 | 2821 | } |
2822 | *rescode_ptr = code; | |
2823 | } | |
2824 | ||
2825 | /* If comparing an integer against a constant more bits wide, | |
2826 | maybe we can deduce a value of 1 or 0 independent of the data. | |
2827 | Or else truncate the constant now | |
2828 | rather than extend the variable at run time. | |
2829 | ||
2830 | This is only interesting if the constant is the wider arg. | |
2831 | Also, it is not safe if the constant is unsigned and the | |
2832 | variable arg is signed, since in this case the variable | |
2833 | would be sign-extended and then regarded as unsigned. | |
2834 | Our technique fails in this case because the lowest/highest | |
2835 | possible unsigned results don't follow naturally from the | |
2836 | lowest/highest possible values of the variable operand. | |
2837 | For just EQ_EXPR and NE_EXPR there is another technique that | |
2838 | could be used: see if the constant can be faithfully represented | |
2839 | in the other operand's type, by truncating it and reextending it | |
2840 | and see if that preserves the constant's value. */ | |
2841 | ||
2842 | if (!real1 && !real2 | |
9421ebb9 | 2843 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b0fc3e72 | 2844 | && TREE_CODE (primop1) == INTEGER_CST |
2845 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
2846 | { | |
2847 | int min_gt, max_gt, min_lt, max_lt; | |
2848 | tree maxval, minval; | |
2849 | /* 1 if comparison is nominally unsigned. */ | |
78a8ed03 | 2850 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b0fc3e72 | 2851 | tree val; |
2852 | ||
4070745f | 2853 | type = c_common_signed_or_unsigned_type (unsignedp0, |
2854 | TREE_TYPE (primop0)); | |
cda09c61 | 2855 | |
b0fc3e72 | 2856 | maxval = TYPE_MAX_VALUE (type); |
2857 | minval = TYPE_MIN_VALUE (type); | |
2858 | ||
2859 | if (unsignedp && !unsignedp0) | |
4070745f | 2860 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b0fc3e72 | 2861 | |
2862 | if (TREE_TYPE (primop1) != *restype_ptr) | |
18dbec6f | 2863 | { |
9a5e8086 | 2864 | /* Convert primop1 to target type, but do not introduce |
2865 | additional overflow. We know primop1 is an int_cst. */ | |
e913b5cd | 2866 | primop1 = force_fit_type (*restype_ptr, |
ee31dd3d | 2867 | wi::to_wide |
2868 | (primop1, | |
2869 | TYPE_PRECISION (*restype_ptr)), | |
e913b5cd | 2870 | 0, TREE_OVERFLOW (primop1)); |
18dbec6f | 2871 | } |
b0fc3e72 | 2872 | if (type != *restype_ptr) |
2873 | { | |
2874 | minval = convert (*restype_ptr, minval); | |
2875 | maxval = convert (*restype_ptr, maxval); | |
2876 | } | |
2877 | ||
d99d10ca | 2878 | min_gt = tree_int_cst_lt (primop1, minval); |
2879 | max_gt = tree_int_cst_lt (primop1, maxval); | |
2880 | min_lt = tree_int_cst_lt (minval, primop1); | |
2881 | max_lt = tree_int_cst_lt (maxval, primop1); | |
b0fc3e72 | 2882 | |
2883 | val = 0; | |
2884 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
2885 | if (code == NE_EXPR) | |
2886 | { | |
2887 | if (max_lt || min_gt) | |
3c2239cf | 2888 | val = truthvalue_true_node; |
b0fc3e72 | 2889 | } |
2890 | else if (code == EQ_EXPR) | |
2891 | { | |
2892 | if (max_lt || min_gt) | |
3c2239cf | 2893 | val = truthvalue_false_node; |
b0fc3e72 | 2894 | } |
2895 | else if (code == LT_EXPR) | |
2896 | { | |
2897 | if (max_lt) | |
3c2239cf | 2898 | val = truthvalue_true_node; |
b0fc3e72 | 2899 | if (!min_lt) |
3c2239cf | 2900 | val = truthvalue_false_node; |
b0fc3e72 | 2901 | } |
2902 | else if (code == GT_EXPR) | |
2903 | { | |
2904 | if (min_gt) | |
3c2239cf | 2905 | val = truthvalue_true_node; |
b0fc3e72 | 2906 | if (!max_gt) |
3c2239cf | 2907 | val = truthvalue_false_node; |
b0fc3e72 | 2908 | } |
2909 | else if (code == LE_EXPR) | |
2910 | { | |
2911 | if (!max_gt) | |
3c2239cf | 2912 | val = truthvalue_true_node; |
b0fc3e72 | 2913 | if (min_gt) |
3c2239cf | 2914 | val = truthvalue_false_node; |
b0fc3e72 | 2915 | } |
2916 | else if (code == GE_EXPR) | |
2917 | { | |
2918 | if (!min_lt) | |
3c2239cf | 2919 | val = truthvalue_true_node; |
b0fc3e72 | 2920 | if (max_lt) |
3c2239cf | 2921 | val = truthvalue_false_node; |
b0fc3e72 | 2922 | } |
2923 | ||
2924 | /* If primop0 was sign-extended and unsigned comparison specd, | |
2925 | we did a signed comparison above using the signed type bounds. | |
2926 | But the comparison we output must be unsigned. | |
2927 | ||
2928 | Also, for inequalities, VAL is no good; but if the signed | |
2929 | comparison had *any* fixed result, it follows that the | |
2930 | unsigned comparison just tests the sign in reverse | |
2931 | (positive values are LE, negative ones GE). | |
2932 | So we can generate an unsigned comparison | |
2933 | against an extreme value of the signed type. */ | |
2934 | ||
2935 | if (unsignedp && !unsignedp0) | |
2936 | { | |
2937 | if (val != 0) | |
2938 | switch (code) | |
2939 | { | |
2940 | case LT_EXPR: | |
2941 | case GE_EXPR: | |
2942 | primop1 = TYPE_MIN_VALUE (type); | |
2943 | val = 0; | |
2944 | break; | |
2945 | ||
2946 | case LE_EXPR: | |
2947 | case GT_EXPR: | |
2948 | primop1 = TYPE_MAX_VALUE (type); | |
2949 | val = 0; | |
2950 | break; | |
31f820d2 | 2951 | |
2952 | default: | |
2953 | break; | |
b0fc3e72 | 2954 | } |
11773141 | 2955 | type = c_common_unsigned_type (type); |
b0fc3e72 | 2956 | } |
2957 | ||
2d3d3af7 | 2958 | if (TREE_CODE (primop0) != INTEGER_CST |
01f11119 | 2959 | /* Don't warn if it's from a (non-system) macro. */ |
2960 | && !(from_macro_expansion_at | |
2961 | (expansion_point_location_if_in_system_header | |
2962 | (EXPR_LOCATION (primop0))))) | |
b0fc3e72 | 2963 | { |
3c2239cf | 2964 | if (val == truthvalue_false_node) |
03fe1dc2 | 2965 | warning_at (loc, OPT_Wtype_limits, |
2966 | "comparison is always false due to limited range of data type"); | |
3c2239cf | 2967 | if (val == truthvalue_true_node) |
03fe1dc2 | 2968 | warning_at (loc, OPT_Wtype_limits, |
2969 | "comparison is always true due to limited range of data type"); | |
b0fc3e72 | 2970 | } |
2971 | ||
2972 | if (val != 0) | |
2973 | { | |
2974 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
2975 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 2976 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b0fc3e72 | 2977 | return val; |
2978 | } | |
2979 | ||
2980 | /* Value is not predetermined, but do the comparison | |
2981 | in the type of the operand that is not constant. | |
2982 | TYPE is already properly set. */ | |
2983 | } | |
c4503c0a | 2984 | |
2985 | /* If either arg is decimal float and the other is float, find the | |
2986 | proper common type to use for comparison. */ | |
7fd22aae | 2987 | else if (real1 && real2 |
2988 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
2989 | && DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1)))) | |
2990 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
2991 | ||
2992 | /* If either arg is decimal float and the other is float, fail. */ | |
c4503c0a | 2993 | else if (real1 && real2 |
2994 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
2995 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
78173203 | 2996 | return NULL_TREE; |
c4503c0a | 2997 | |
b0fc3e72 | 2998 | else if (real1 && real2 |
2203bd5c | 2999 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
3000 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b0fc3e72 | 3001 | type = TREE_TYPE (primop0); |
3002 | ||
3003 | /* If args' natural types are both narrower than nominal type | |
3004 | and both extend in the same manner, compare them | |
3005 | in the type of the wider arg. | |
3006 | Otherwise must actually extend both to the nominal | |
3007 | common type lest different ways of extending | |
3008 | alter the result. | |
3009 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
3010 | ||
3011 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
3012 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
3013 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
3014 | { | |
3015 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
4070745f | 3016 | type = c_common_signed_or_unsigned_type (unsignedp0 |
78a8ed03 | 3017 | || TYPE_UNSIGNED (*restype_ptr), |
4070745f | 3018 | type); |
b0fc3e72 | 3019 | /* Make sure shorter operand is extended the right way |
3020 | to match the longer operand. */ | |
4070745f | 3021 | primop0 |
3022 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
3023 | TREE_TYPE (primop0)), | |
3024 | primop0); | |
3025 | primop1 | |
3026 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
3027 | TREE_TYPE (primop1)), | |
3028 | primop1); | |
b0fc3e72 | 3029 | } |
3030 | else | |
3031 | { | |
3032 | /* Here we must do the comparison on the nominal type | |
3033 | using the args exactly as we received them. */ | |
3034 | type = *restype_ptr; | |
3035 | primop0 = op0; | |
3036 | primop1 = op1; | |
3037 | ||
3bb711c4 | 3038 | /* We want to fold unsigned comparisons of >= and < against zero. |
3039 | For these, we may also issue a warning if we have a non-constant | |
3040 | compared against zero, where the zero was spelled as "0" (rather | |
3041 | than merely folding to it). | |
3042 | If we have at least one constant, then op1 is constant | |
3043 | and we may have a non-constant expression as op0. */ | |
b0fc3e72 | 3044 | if (!real1 && !real2 && integer_zerop (primop1) |
78a8ed03 | 3045 | && TYPE_UNSIGNED (*restype_ptr)) |
b0fc3e72 | 3046 | { |
72749341 | 3047 | tree value = NULL_TREE; |
03fe1dc2 | 3048 | /* All unsigned values are >= 0, so we warn. However, |
3049 | if OP0 is a constant that is >= 0, the signedness of | |
3050 | the comparison isn't an issue, so suppress the | |
3051 | warning. */ | |
3bb711c4 | 3052 | tree folded_op0 = fold_for_warn (op0); |
03fe1dc2 | 3053 | bool warn = |
3df42822 | 3054 | warn_type_limits && !in_system_header_at (loc) |
3bb711c4 | 3055 | && !(TREE_CODE (folded_op0) == INTEGER_CST |
03fe1dc2 | 3056 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), |
3bb711c4 | 3057 | folded_op0))) |
03fe1dc2 | 3058 | /* Do not warn for enumeration types. */ |
3bb711c4 | 3059 | && (TREE_CODE (expr_original_type (folded_op0)) != ENUMERAL_TYPE); |
03fe1dc2 | 3060 | |
b0fc3e72 | 3061 | switch (code) |
3062 | { | |
3063 | case GE_EXPR: | |
03fe1dc2 | 3064 | if (warn) |
3065 | warning_at (loc, OPT_Wtype_limits, | |
3066 | "comparison of unsigned expression >= 0 is always true"); | |
3c2239cf | 3067 | value = truthvalue_true_node; |
b0fc3e72 | 3068 | break; |
3069 | ||
3070 | case LT_EXPR: | |
03fe1dc2 | 3071 | if (warn) |
3072 | warning_at (loc, OPT_Wtype_limits, | |
3073 | "comparison of unsigned expression < 0 is always false"); | |
3c2239cf | 3074 | value = truthvalue_false_node; |
31f820d2 | 3075 | break; |
3076 | ||
3077 | default: | |
3078 | break; | |
b0fc3e72 | 3079 | } |
3080 | ||
72749341 | 3081 | if (value != NULL_TREE) |
b0fc3e72 | 3082 | { |
3083 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3084 | if (TREE_SIDE_EFFECTS (primop0)) | |
14ae0310 | 3085 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
3086 | primop0, value); | |
b0fc3e72 | 3087 | return value; |
3088 | } | |
3089 | } | |
3090 | } | |
3091 | ||
3092 | *op0_ptr = convert (type, primop0); | |
3093 | *op1_ptr = convert (type, primop1); | |
3094 | ||
3c2239cf | 3095 | *restype_ptr = truthvalue_type_node; |
b0fc3e72 | 3096 | |
78173203 | 3097 | return NULL_TREE; |
b0fc3e72 | 3098 | } |
3099 | \f | |
1c26100f | 3100 | /* Return a tree for the sum or difference (RESULTCODE says which) |
3101 | of pointer PTROP and integer INTOP. */ | |
3102 | ||
3103 | tree | |
389dd41b | 3104 | pointer_int_sum (location_t loc, enum tree_code resultcode, |
42f9a786 | 3105 | tree ptrop, tree intop, bool complain) |
1c26100f | 3106 | { |
add6ee5e | 3107 | tree size_exp, ret; |
1c26100f | 3108 | |
1c26100f | 3109 | /* The result is a pointer of the same type that is being added. */ |
1c26100f | 3110 | tree result_type = TREE_TYPE (ptrop); |
3111 | ||
3112 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
3113 | { | |
42f9a786 | 3114 | if (complain && warn_pointer_arith) |
3115 | pedwarn (loc, OPT_Wpointer_arith, | |
3116 | "pointer of type %<void *%> used in arithmetic"); | |
3117 | else if (!complain) | |
3118 | return error_mark_node; | |
1c26100f | 3119 | size_exp = integer_one_node; |
3120 | } | |
3121 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
3122 | { | |
42f9a786 | 3123 | if (complain && warn_pointer_arith) |
3124 | pedwarn (loc, OPT_Wpointer_arith, | |
3125 | "pointer to a function used in arithmetic"); | |
3126 | else if (!complain) | |
3127 | return error_mark_node; | |
1c26100f | 3128 | size_exp = integer_one_node; |
3129 | } | |
1c26100f | 3130 | else |
22a3f7bd | 3131 | size_exp = size_in_bytes_loc (loc, TREE_TYPE (result_type)); |
1c26100f | 3132 | |
add6ee5e | 3133 | /* We are manipulating pointer values, so we don't need to warn |
3134 | about relying on undefined signed overflow. We disable the | |
3135 | warning here because we use integer types so fold won't know that | |
3136 | they are really pointers. */ | |
3137 | fold_defer_overflow_warnings (); | |
3138 | ||
1c26100f | 3139 | /* If what we are about to multiply by the size of the elements |
3140 | contains a constant term, apply distributive law | |
3141 | and multiply that constant term separately. | |
3142 | This helps produce common subexpressions. */ | |
1c26100f | 3143 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
84166705 | 3144 | && !TREE_CONSTANT (intop) |
1c26100f | 3145 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
3146 | && TREE_CONSTANT (size_exp) | |
3147 | /* If the constant comes from pointer subtraction, | |
3148 | skip this optimization--it would cause an error. */ | |
3149 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
3150 | /* If the constant is unsigned, and smaller than the pointer size, | |
3151 | then we must skip this optimization. This is because it could cause | |
3152 | an overflow error if the constant is negative but INTOP is not. */ | |
84166705 | 3153 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
1c26100f | 3154 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
3155 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
3156 | { | |
3157 | enum tree_code subcode = resultcode; | |
3158 | tree int_type = TREE_TYPE (intop); | |
3159 | if (TREE_CODE (intop) == MINUS_EXPR) | |
3160 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
3161 | /* Convert both subexpression types to the type of intop, | |
3162 | because weird cases involving pointer arithmetic | |
3163 | can result in a sum or difference with different type args. */ | |
8e70fb09 | 3164 | ptrop = build_binary_op (EXPR_LOCATION (TREE_OPERAND (intop, 1)), |
3165 | subcode, ptrop, | |
623ee358 | 3166 | convert (int_type, TREE_OPERAND (intop, 1)), |
3167 | true); | |
1c26100f | 3168 | intop = convert (int_type, TREE_OPERAND (intop, 0)); |
3169 | } | |
3170 | ||
3171 | /* Convert the integer argument to a type the same size as sizetype | |
3172 | so the multiply won't overflow spuriously. */ | |
1c26100f | 3173 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
78a8ed03 | 3174 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
1cae46be | 3175 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
78a8ed03 | 3176 | TYPE_UNSIGNED (sizetype)), intop); |
1c26100f | 3177 | |
3178 | /* Replace the integer argument with a suitable product by the object size. | |
c6feb9f1 | 3179 | Do this multiplication as signed, then convert to the appropriate type |
8032877c | 3180 | for the pointer operation and disregard an overflow that occurred only |
c6feb9f1 | 3181 | because of the sign-extension change in the latter conversion. */ |
3182 | { | |
f576a2e4 | 3183 | tree t = fold_build2_loc (loc, MULT_EXPR, TREE_TYPE (intop), intop, |
3184 | convert (TREE_TYPE (intop), size_exp)); | |
c6feb9f1 | 3185 | intop = convert (sizetype, t); |
3186 | if (TREE_OVERFLOW_P (intop) && !TREE_OVERFLOW (t)) | |
e3d0f65c | 3187 | intop = wide_int_to_tree (TREE_TYPE (intop), wi::to_wide (intop)); |
c6feb9f1 | 3188 | } |
0de36bdb | 3189 | |
499e523f | 3190 | /* Create the sum or difference. */ |
0de36bdb | 3191 | if (resultcode == MINUS_EXPR) |
389dd41b | 3192 | intop = fold_build1_loc (loc, NEGATE_EXPR, sizetype, intop); |
1c26100f | 3193 | |
2cc66f2a | 3194 | ret = fold_build_pointer_plus_loc (loc, ptrop, intop); |
add6ee5e | 3195 | |
3196 | fold_undefer_and_ignore_overflow_warnings (); | |
3197 | ||
3198 | return ret; | |
1c26100f | 3199 | } |
3200 | \f | |
f59e3889 | 3201 | /* Wrap a C_MAYBE_CONST_EXPR around an expression that is fully folded |
3202 | and if NON_CONST is known not to be permitted in an evaluated part | |
3203 | of a constant expression. */ | |
3204 | ||
3205 | tree | |
3206 | c_wrap_maybe_const (tree expr, bool non_const) | |
3207 | { | |
3208 | bool nowarning = TREE_NO_WARNING (expr); | |
3209 | location_t loc = EXPR_LOCATION (expr); | |
3210 | ||
3211 | /* This should never be called for C++. */ | |
3212 | if (c_dialect_cxx ()) | |
3213 | gcc_unreachable (); | |
3214 | ||
3215 | /* The result of folding may have a NOP_EXPR to set TREE_NO_WARNING. */ | |
3216 | STRIP_TYPE_NOPS (expr); | |
3217 | expr = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL, expr); | |
3218 | C_MAYBE_CONST_EXPR_NON_CONST (expr) = non_const; | |
3219 | if (nowarning) | |
3220 | TREE_NO_WARNING (expr) = 1; | |
3221 | protected_set_expr_location (expr, loc); | |
3222 | ||
3223 | return expr; | |
3224 | } | |
3225 | ||
6b68e71a | 3226 | /* Return whether EXPR is a declaration whose address can never be |
3227 | NULL. */ | |
3228 | ||
3229 | bool | |
9f627b1a | 3230 | decl_with_nonnull_addr_p (const_tree expr) |
6b68e71a | 3231 | { |
3232 | return (DECL_P (expr) | |
3233 | && (TREE_CODE (expr) == PARM_DECL | |
3234 | || TREE_CODE (expr) == LABEL_DECL | |
3235 | || !DECL_WEAK (expr))); | |
3236 | } | |
3237 | ||
b0fc3e72 | 3238 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
45a78cc0 | 3239 | or for an `if' or `while' statement or ?..: exp. It should already |
3240 | have been validated to be of suitable type; otherwise, a bad | |
3241 | diagnostic may result. | |
b0fc3e72 | 3242 | |
8e70fb09 | 3243 | The EXPR is located at LOCATION. |
3244 | ||
b0fc3e72 | 3245 | This preparation consists of taking the ordinary |
3246 | representation of an expression expr and producing a valid tree | |
3247 | boolean expression describing whether expr is nonzero. We could | |
3c2239cf | 3248 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b0fc3e72 | 3249 | but we optimize comparisons, &&, ||, and !. |
3250 | ||
3c2239cf | 3251 | The resulting type should always be `truthvalue_type_node'. */ |
b0fc3e72 | 3252 | |
3253 | tree | |
8e70fb09 | 3254 | c_common_truthvalue_conversion (location_t location, tree expr) |
b0fc3e72 | 3255 | { |
d582d140 | 3256 | STRIP_ANY_LOCATION_WRAPPER (expr); |
b0fc3e72 | 3257 | switch (TREE_CODE (expr)) |
3258 | { | |
318a728f | 3259 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
e1232ce2 | 3260 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
3261 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
3262 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
ce04dcdc | 3263 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3264 | return expr; | |
e60a6f7b | 3265 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
ce04dcdc | 3266 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); |
e60a6f7b | 3267 | goto ret; |
ce04dcdc | 3268 | |
b0fc3e72 | 3269 | case TRUTH_ANDIF_EXPR: |
3270 | case TRUTH_ORIF_EXPR: | |
3271 | case TRUTH_AND_EXPR: | |
3272 | case TRUTH_OR_EXPR: | |
31f6e93c | 3273 | case TRUTH_XOR_EXPR: |
ce04dcdc | 3274 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3275 | return expr; | |
e60a6f7b | 3276 | expr = build2 (TREE_CODE (expr), truthvalue_type_node, |
48e1416a | 3277 | c_common_truthvalue_conversion (location, |
e60a6f7b | 3278 | TREE_OPERAND (expr, 0)), |
3279 | c_common_truthvalue_conversion (location, | |
3280 | TREE_OPERAND (expr, 1))); | |
3281 | goto ret; | |
3e851b85 | 3282 | |
f6e28f72 | 3283 | case TRUTH_NOT_EXPR: |
ce04dcdc | 3284 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3285 | return expr; | |
e60a6f7b | 3286 | expr = build1 (TREE_CODE (expr), truthvalue_type_node, |
3287 | c_common_truthvalue_conversion (location, | |
3288 | TREE_OPERAND (expr, 0))); | |
3289 | goto ret; | |
f6e28f72 | 3290 | |
b0fc3e72 | 3291 | case ERROR_MARK: |
3292 | return expr; | |
ab2c1de8 | 3293 | |
b0fc3e72 | 3294 | case INTEGER_CST: |
0365bfa8 | 3295 | if (TREE_CODE (TREE_TYPE (expr)) == ENUMERAL_TYPE |
3296 | && !integer_zerop (expr) | |
3297 | && !integer_onep (expr)) | |
3298 | warning_at (location, OPT_Wint_in_bool_context, | |
3299 | "enum constant in boolean context"); | |
eddad94a | 3300 | return integer_zerop (expr) ? truthvalue_false_node |
3301 | : truthvalue_true_node; | |
b0fc3e72 | 3302 | |
3303 | case REAL_CST: | |
5000e21c | 3304 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
3305 | ? truthvalue_true_node | |
3306 | : truthvalue_false_node; | |
b0fc3e72 | 3307 | |
9421ebb9 | 3308 | case FIXED_CST: |
3309 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
3310 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
3311 | ? truthvalue_true_node | |
3312 | : truthvalue_false_node; | |
3313 | ||
ce04dcdc | 3314 | case FUNCTION_DECL: |
b99cc6da | 3315 | expr = build_unary_op (location, ADDR_EXPR, expr, false); |
ce04dcdc | 3316 | /* Fall through. */ |
3317 | ||
b0fc3e72 | 3318 | case ADDR_EXPR: |
ce871053 | 3319 | { |
ee7d4d6a | 3320 | tree inner = TREE_OPERAND (expr, 0); |
6b68e71a | 3321 | if (decl_with_nonnull_addr_p (inner)) |
ce871053 | 3322 | { |
6c77f4a4 | 3323 | /* Common Ada programmer's mistake. */ |
8e70fb09 | 3324 | warning_at (location, |
3325 | OPT_Waddress, | |
3326 | "the address of %qD will always evaluate as %<true%>", | |
3327 | inner); | |
ce871053 | 3328 | return truthvalue_true_node; |
3329 | } | |
d473d901 | 3330 | break; |
ce871053 | 3331 | } |
b0fc3e72 | 3332 | |
2203bd5c | 3333 | case COMPLEX_EXPR: |
e60a6f7b | 3334 | expr = build_binary_op (EXPR_LOCATION (expr), |
8e70fb09 | 3335 | (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
95809de4 | 3336 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
8e70fb09 | 3337 | c_common_truthvalue_conversion (location, |
3338 | TREE_OPERAND (expr, 0)), | |
3339 | c_common_truthvalue_conversion (location, | |
3340 | TREE_OPERAND (expr, 1)), | |
623ee358 | 3341 | false); |
e60a6f7b | 3342 | goto ret; |
2203bd5c | 3343 | |
b0fc3e72 | 3344 | case NEGATE_EXPR: |
3345 | case ABS_EXPR: | |
1c67942e | 3346 | case ABSU_EXPR: |
b0fc3e72 | 3347 | case FLOAT_EXPR: |
c6418a4e | 3348 | case EXCESS_PRECISION_EXPR: |
d10cfa8d | 3349 | /* These don't change whether an object is nonzero or zero. */ |
8e70fb09 | 3350 | return c_common_truthvalue_conversion (location, TREE_OPERAND (expr, 0)); |
b0fc3e72 | 3351 | |
3352 | case LROTATE_EXPR: | |
3353 | case RROTATE_EXPR: | |
d10cfa8d | 3354 | /* These don't change whether an object is zero or nonzero, but |
b0fc3e72 | 3355 | we can't ignore them if their second arg has side-effects. */ |
3356 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
e60a6f7b | 3357 | { |
3358 | expr = build2 (COMPOUND_EXPR, truthvalue_type_node, | |
3359 | TREE_OPERAND (expr, 1), | |
48e1416a | 3360 | c_common_truthvalue_conversion |
e60a6f7b | 3361 | (location, TREE_OPERAND (expr, 0))); |
3362 | goto ret; | |
3363 | } | |
b0fc3e72 | 3364 | else |
8e70fb09 | 3365 | return c_common_truthvalue_conversion (location, |
3366 | TREE_OPERAND (expr, 0)); | |
73be5127 | 3367 | |
5f64e688 | 3368 | case MULT_EXPR: |
3369 | warning_at (EXPR_LOCATION (expr), OPT_Wint_in_bool_context, | |
3370 | "%<*%> in boolean context, suggest %<&&%> instead"); | |
3371 | break; | |
3372 | ||
255beb07 | 3373 | case LSHIFT_EXPR: |
3645e924 | 3374 | /* We will only warn on signed shifts here, because the majority of |
5c2ba578 | 3375 | false positive warnings happen in code where unsigned arithmetic |
3376 | was used in anticipation of a possible overflow. | |
3377 | Furthermore, if we see an unsigned type here we know that the | |
3378 | result of the shift is not subject to integer promotion rules. */ | |
3379 | if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE | |
3380 | && !TYPE_UNSIGNED (TREE_TYPE (expr))) | |
3381 | warning_at (EXPR_LOCATION (expr), OPT_Wint_in_bool_context, | |
5f64e688 | 3382 | "%<<<%> in boolean context, did you mean %<<%> ?"); |
255beb07 | 3383 | break; |
3384 | ||
b0fc3e72 | 3385 | case COND_EXPR: |
a5fe0b37 | 3386 | if (warn_int_in_bool_context |
3387 | && !from_macro_definition_at (EXPR_LOCATION (expr))) | |
bed03df1 | 3388 | { |
3389 | tree val1 = fold_for_warn (TREE_OPERAND (expr, 1)); | |
3390 | tree val2 = fold_for_warn (TREE_OPERAND (expr, 2)); | |
3391 | if (TREE_CODE (val1) == INTEGER_CST | |
3392 | && TREE_CODE (val2) == INTEGER_CST | |
3393 | && !integer_zerop (val1) | |
3394 | && !integer_zerop (val2) | |
3395 | && (!integer_onep (val1) | |
3396 | || !integer_onep (val2))) | |
3397 | warning_at (EXPR_LOCATION (expr), OPT_Wint_in_bool_context, | |
a5fe0b37 | 3398 | "?: using integer constants in boolean context, " |
3399 | "the expression will always evaluate to %<true%>"); | |
2b6903a5 | 3400 | else if ((TREE_CODE (val1) == INTEGER_CST |
3401 | && !integer_zerop (val1) | |
3402 | && !integer_onep (val1)) | |
3403 | || (TREE_CODE (val2) == INTEGER_CST | |
3404 | && !integer_zerop (val2) | |
3405 | && !integer_onep (val2))) | |
3406 | warning_at (EXPR_LOCATION (expr), OPT_Wint_in_bool_context, | |
3407 | "?: using integer constants in boolean context"); | |
bed03df1 | 3408 | } |
b0fc3e72 | 3409 | /* Distribute the conversion into the arms of a COND_EXPR. */ |
a75b1c71 | 3410 | if (c_dialect_cxx ()) |
7a7ca07c | 3411 | /* Avoid premature folding. */ |
3412 | break; | |
a75b1c71 | 3413 | else |
e60a6f7b | 3414 | { |
255beb07 | 3415 | int w = warn_int_in_bool_context; |
3416 | warn_int_in_bool_context = 0; | |
e60a6f7b | 3417 | /* Folding will happen later for C. */ |
3418 | expr = build3 (COND_EXPR, truthvalue_type_node, | |
3419 | TREE_OPERAND (expr, 0), | |
3420 | c_common_truthvalue_conversion (location, | |
3421 | TREE_OPERAND (expr, 1)), | |
3422 | c_common_truthvalue_conversion (location, | |
3423 | TREE_OPERAND (expr, 2))); | |
255beb07 | 3424 | warn_int_in_bool_context = w; |
e60a6f7b | 3425 | goto ret; |
3426 | } | |
b0fc3e72 | 3427 | |
72dd6141 | 3428 | CASE_CONVERT: |
f8913d47 | 3429 | { |
3430 | tree totype = TREE_TYPE (expr); | |
3431 | tree fromtype = TREE_TYPE (TREE_OPERAND (expr, 0)); | |
3432 | ||
db3d1ffc | 3433 | if (POINTER_TYPE_P (totype) |
0c0f63cb | 3434 | && !c_inhibit_evaluation_warnings |
db3d1ffc | 3435 | && TREE_CODE (fromtype) == REFERENCE_TYPE) |
3436 | { | |
3437 | tree inner = expr; | |
3438 | STRIP_NOPS (inner); | |
3439 | ||
3440 | if (DECL_P (inner)) | |
3441 | warning_at (location, | |
3442 | OPT_Waddress, | |
3443 | "the compiler can assume that the address of " | |
3444 | "%qD will always evaluate to %<true%>", | |
3445 | inner); | |
3446 | } | |
3447 | ||
f8913d47 | 3448 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
3449 | since that affects how `default_conversion' will behave. */ | |
3450 | if (TREE_CODE (totype) == REFERENCE_TYPE | |
3451 | || TREE_CODE (fromtype) == REFERENCE_TYPE) | |
3452 | break; | |
3453 | /* Don't strip a conversion from C++0x scoped enum, since they | |
3454 | don't implicitly convert to other types. */ | |
3455 | if (TREE_CODE (fromtype) == ENUMERAL_TYPE | |
3456 | && ENUM_IS_SCOPED (fromtype)) | |
3457 | break; | |
3458 | /* If this isn't narrowing the argument, we can ignore it. */ | |
3459 | if (TYPE_PRECISION (totype) >= TYPE_PRECISION (fromtype)) | |
3460 | return c_common_truthvalue_conversion (location, | |
3461 | TREE_OPERAND (expr, 0)); | |
3462 | } | |
b0fc3e72 | 3463 | break; |
3464 | ||
16837b18 | 3465 | case MODIFY_EXPR: |
60a0513e | 3466 | if (!TREE_NO_WARNING (expr) |
94a62c5a | 3467 | && warn_parentheses |
3468 | && warning_at (location, OPT_Wparentheses, | |
3469 | "suggest parentheses around assignment used as " | |
3470 | "truth value")) | |
3471 | TREE_NO_WARNING (expr) = 1; | |
16837b18 | 3472 | break; |
73be5127 | 3473 | |
d582d140 | 3474 | case CONST_DECL: |
3475 | { | |
3476 | tree folded_expr = fold_for_warn (expr); | |
3477 | if (folded_expr != expr) | |
3478 | return c_common_truthvalue_conversion (location, folded_expr); | |
3479 | } | |
3480 | break; | |
3481 | ||
31f820d2 | 3482 | default: |
3483 | break; | |
b0fc3e72 | 3484 | } |
3485 | ||
2ba726d2 | 3486 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
a0748b7d | 3487 | { |
d0869ea4 | 3488 | tree t = save_expr (expr); |
e60a6f7b | 3489 | expr = (build_binary_op |
8e70fb09 | 3490 | (EXPR_LOCATION (expr), |
3491 | (TREE_SIDE_EFFECTS (expr) | |
a0748b7d | 3492 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
b6889cb0 | 3493 | c_common_truthvalue_conversion |
3494 | (location, | |
b99cc6da | 3495 | build_unary_op (location, REALPART_EXPR, t, false)), |
b6889cb0 | 3496 | c_common_truthvalue_conversion |
3497 | (location, | |
b99cc6da | 3498 | build_unary_op (location, IMAGPART_EXPR, t, false)), |
623ee358 | 3499 | false)); |
e60a6f7b | 3500 | goto ret; |
a0748b7d | 3501 | } |
2ba726d2 | 3502 | |
9421ebb9 | 3503 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
3504 | { | |
3505 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
3506 | FCONST0 (TYPE_MODE | |
3507 | (TREE_TYPE (expr)))); | |
623ee358 | 3508 | return build_binary_op (location, NE_EXPR, expr, fixed_zero_node, true); |
9421ebb9 | 3509 | } |
e60a6f7b | 3510 | else |
623ee358 | 3511 | return build_binary_op (location, NE_EXPR, expr, integer_zero_node, true); |
9421ebb9 | 3512 | |
e60a6f7b | 3513 | ret: |
3514 | protected_set_expr_location (expr, location); | |
3515 | return expr; | |
b0fc3e72 | 3516 | } |
3517 | \f | |
3237155d | 3518 | static void def_builtin_1 (enum built_in_function fncode, |
3519 | const char *name, | |
3520 | enum built_in_class fnclass, | |
3521 | tree fntype, tree libtype, | |
3522 | bool both_p, bool fallback_p, bool nonansi_p, | |
3523 | tree fnattrs, bool implicit_p); | |
0d4238dc | 3524 | |
a5b1863e | 3525 | |
3526 | /* Apply the TYPE_QUALS to the new DECL. */ | |
3527 | ||
3528 | void | |
1cae46be | 3529 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
a5b1863e | 3530 | { |
adfb367f | 3531 | tree type = TREE_TYPE (decl); |
b27ac6b5 | 3532 | |
e4eabbe4 | 3533 | if (type == error_mark_node) |
3534 | return; | |
adfb367f | 3535 | |
98a33d9f | 3536 | if ((type_quals & TYPE_QUAL_CONST) |
3537 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
3538 | /* We used to check TYPE_NEEDS_CONSTRUCTING here, but now a constexpr | |
3539 | constructor can produce constant init, so rely on cp_finish_decl to | |
3540 | clear TREE_READONLY if the variable has non-constant init. */ | |
a5b1863e | 3541 | TREE_READONLY (decl) = 1; |
3542 | if (type_quals & TYPE_QUAL_VOLATILE) | |
3543 | { | |
3544 | TREE_SIDE_EFFECTS (decl) = 1; | |
3545 | TREE_THIS_VOLATILE (decl) = 1; | |
3546 | } | |
d91a20bc | 3547 | if (type_quals & TYPE_QUAL_RESTRICT) |
a5b1863e | 3548 | { |
adfb367f | 3549 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
3550 | /* Allow 'restrict' on arrays of pointers. | |
3551 | FIXME currently we just ignore it. */ | |
3552 | type = TREE_TYPE (type); | |
3553 | if (!type | |
3554 | || !POINTER_TYPE_P (type) | |
3555 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
b0b1af64 | 3556 | error ("invalid use of %<restrict%>"); |
a5b1863e | 3557 | } |
3558 | } | |
3559 | ||
b5ba9f3a | 3560 | /* Return the typed-based alias set for T, which may be an expression |
f7c44134 | 3561 | or a type. Return -1 if we don't do anything special. */ |
ab2c1de8 | 3562 | |
32c2fdea | 3563 | alias_set_type |
1cae46be | 3564 | c_common_get_alias_set (tree t) |
b5ba9f3a | 3565 | { |
e58c17e7 | 3566 | /* For VLAs, use the alias set of the element type rather than the |
3567 | default of alias set 0 for types compared structurally. */ | |
3568 | if (TYPE_P (t) && TYPE_STRUCTURAL_EQUALITY_P (t)) | |
3569 | { | |
3570 | if (TREE_CODE (t) == ARRAY_TYPE) | |
3571 | return get_alias_set (TREE_TYPE (t)); | |
3572 | return -1; | |
3573 | } | |
3574 | ||
9fcc3e54 | 3575 | /* That's all the expressions we handle specially. */ |
84166705 | 3576 | if (!TYPE_P (t)) |
9fcc3e54 | 3577 | return -1; |
3578 | ||
82362779 | 3579 | /* Unlike char, char8_t doesn't alias. */ |
3580 | if (flag_char8_t && t == char8_type_node) | |
3581 | return -1; | |
3582 | ||
d716ce75 | 3583 | /* The C standard guarantees that any object may be accessed via an |
82362779 | 3584 | lvalue that has narrow character type (except char8_t). */ |
9fcc3e54 | 3585 | if (t == char_type_node |
3586 | || t == signed_char_type_node | |
3587 | || t == unsigned_char_type_node) | |
f7c44134 | 3588 | return 0; |
a5b1863e | 3589 | |
1607663f | 3590 | /* The C standard specifically allows aliasing between signed and |
3591 | unsigned variants of the same type. We treat the signed | |
3592 | variant as canonical. */ | |
78a8ed03 | 3593 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
a8868e19 | 3594 | { |
4070745f | 3595 | tree t1 = c_common_signed_type (t); |
1607663f | 3596 | |
a8868e19 | 3597 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
3598 | if (t1 != t) | |
3599 | return get_alias_set (t1); | |
3600 | } | |
1e2513d9 | 3601 | |
f7c44134 | 3602 | return -1; |
b5ba9f3a | 3603 | } |
902b4e01 | 3604 | \f |
e60a6f7b | 3605 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where |
a179a7dc | 3606 | the IS_SIZEOF parameter indicates which operator is being applied. |
e60a6f7b | 3607 | The COMPLAIN flag controls whether we should diagnose possibly |
3608 | ill-formed constructs or not. LOC is the location of the SIZEOF or | |
a179a7dc | 3609 | TYPEOF operator. If MIN_ALIGNOF, the least alignment required for |
3610 | a type in any context should be returned, rather than the normal | |
3611 | alignment for that type. */ | |
908c697e | 3612 | |
902b4e01 | 3613 | tree |
e60a6f7b | 3614 | c_sizeof_or_alignof_type (location_t loc, |
a179a7dc | 3615 | tree type, bool is_sizeof, bool min_alignof, |
3616 | int complain) | |
902b4e01 | 3617 | { |
d4c4d95c | 3618 | const char *op_name; |
3619 | tree value = NULL; | |
3620 | enum tree_code type_code = TREE_CODE (type); | |
1cae46be | 3621 | |
908c697e | 3622 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
1cae46be | 3623 | |
d4c4d95c | 3624 | if (type_code == FUNCTION_TYPE) |
902b4e01 | 3625 | { |
908c697e | 3626 | if (is_sizeof) |
d4c4d95c | 3627 | { |
9205a6cc | 3628 | if (complain && warn_pointer_arith) |
3629 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 3630 | "invalid application of %<sizeof%> to a function type"); |
ebd21de4 | 3631 | else if (!complain) |
3632 | return error_mark_node; | |
d4c4d95c | 3633 | value = size_one_node; |
3634 | } | |
3635 | else | |
83e25171 | 3636 | { |
3637 | if (complain) | |
3638 | { | |
3639 | if (c_dialect_cxx ()) | |
29438999 | 3640 | pedwarn (loc, OPT_Wpedantic, "ISO C++ does not permit " |
83e25171 | 3641 | "%<alignof%> applied to a function type"); |
3642 | else | |
29438999 | 3643 | pedwarn (loc, OPT_Wpedantic, "ISO C does not permit " |
83e25171 | 3644 | "%<_Alignof%> applied to a function type"); |
3645 | } | |
3646 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
3647 | } | |
d4c4d95c | 3648 | } |
3649 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
3650 | { | |
1cae46be | 3651 | if (type_code == VOID_TYPE |
9205a6cc | 3652 | && complain && warn_pointer_arith) |
3653 | pedwarn (loc, OPT_Wpointer_arith, | |
8864917d | 3654 | "invalid application of %qs to a void type", op_name); |
ebd21de4 | 3655 | else if (!complain) |
3656 | return error_mark_node; | |
d4c4d95c | 3657 | value = size_one_node; |
902b4e01 | 3658 | } |
3df19e1b | 3659 | else if (!COMPLETE_TYPE_P (type) |
3660 | && (!c_dialect_cxx () || is_sizeof || type_code != ARRAY_TYPE)) | |
902b4e01 | 3661 | { |
d3a4d008 | 3662 | if (complain) |
3df19e1b | 3663 | error_at (loc, "invalid application of %qs to incomplete type %qT", |
e60a6f7b | 3664 | op_name, type); |
9c719c74 | 3665 | return error_mark_node; |
902b4e01 | 3666 | } |
3df19e1b | 3667 | else if (c_dialect_cxx () && type_code == ARRAY_TYPE |
3668 | && !COMPLETE_TYPE_P (TREE_TYPE (type))) | |
3669 | { | |
3670 | if (complain) | |
3671 | error_at (loc, "invalid application of %qs to array type %qT of " | |
3672 | "incomplete element type", op_name, type); | |
3673 | return error_mark_node; | |
3674 | } | |
902b4e01 | 3675 | else |
d4c4d95c | 3676 | { |
908c697e | 3677 | if (is_sizeof) |
d4c4d95c | 3678 | /* Convert in case a char is more than one unit. */ |
389dd41b | 3679 | value = size_binop_loc (loc, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
3680 | size_int (TYPE_PRECISION (char_type_node) | |
3681 | / BITS_PER_UNIT)); | |
a179a7dc | 3682 | else if (min_alignof) |
c2c4ae8d | 3683 | value = size_int (min_align_of_type (type)); |
d4c4d95c | 3684 | else |
d37625c0 | 3685 | value = size_int (TYPE_ALIGN_UNIT (type)); |
d4c4d95c | 3686 | } |
902b4e01 | 3687 | |
5a1fe2db | 3688 | /* VALUE will have the middle-end integer type sizetype. |
3689 | However, we should really return a value of type `size_t', | |
3690 | which is just a typedef for an ordinary integer type. */ | |
389dd41b | 3691 | value = fold_convert_loc (loc, size_type_node, value); |
1cae46be | 3692 | |
d4c4d95c | 3693 | return value; |
902b4e01 | 3694 | } |
3695 | ||
3696 | /* Implement the __alignof keyword: Return the minimum required | |
097b5c8b | 3697 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
3698 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
e60a6f7b | 3699 | from an "aligned" __attribute__ specification). LOC is the |
3700 | location of the ALIGNOF operator. */ | |
72040e7e | 3701 | |
902b4e01 | 3702 | tree |
e60a6f7b | 3703 | c_alignof_expr (location_t loc, tree expr) |
902b4e01 | 3704 | { |
3705 | tree t; | |
3706 | ||
097b5c8b | 3707 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
d37625c0 | 3708 | t = size_int (DECL_ALIGN_UNIT (expr)); |
1cae46be | 3709 | |
902b4e01 | 3710 | else if (TREE_CODE (expr) == COMPONENT_REF |
3711 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
3712 | { | |
e60a6f7b | 3713 | error_at (loc, "%<__alignof%> applied to a bit-field"); |
902b4e01 | 3714 | t = size_one_node; |
3715 | } | |
3716 | else if (TREE_CODE (expr) == COMPONENT_REF | |
7cc7e163 | 3717 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
d37625c0 | 3718 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
1cae46be | 3719 | |
aa3e402e | 3720 | else if (INDIRECT_REF_P (expr)) |
902b4e01 | 3721 | { |
3722 | tree t = TREE_OPERAND (expr, 0); | |
3723 | tree best = t; | |
3724 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
1cae46be | 3725 | |
72dd6141 | 3726 | while (CONVERT_EXPR_P (t) |
7cc7e163 | 3727 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
902b4e01 | 3728 | { |
3729 | int thisalign; | |
3730 | ||
3731 | t = TREE_OPERAND (t, 0); | |
3732 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
3733 | if (thisalign > bestalign) | |
3734 | best = t, bestalign = thisalign; | |
3735 | } | |
e60a6f7b | 3736 | return c_alignof (loc, TREE_TYPE (TREE_TYPE (best))); |
902b4e01 | 3737 | } |
3738 | else | |
e60a6f7b | 3739 | return c_alignof (loc, TREE_TYPE (expr)); |
902b4e01 | 3740 | |
389dd41b | 3741 | return fold_convert_loc (loc, size_type_node, t); |
902b4e01 | 3742 | } |
3743 | \f | |
8fe4a266 | 3744 | /* Handle C and C++ default attributes. */ |
3745 | ||
3746 | enum built_in_attribute | |
3747 | { | |
3748 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
3749 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
c8010b80 | 3750 | #define DEF_ATTR_STRING(ENUM, VALUE) ENUM, |
8fe4a266 | 3751 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, |
3752 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
8fe4a266 | 3753 | #include "builtin-attrs.def" |
3754 | #undef DEF_ATTR_NULL_TREE | |
3755 | #undef DEF_ATTR_INT | |
c8010b80 | 3756 | #undef DEF_ATTR_STRING |
8fe4a266 | 3757 | #undef DEF_ATTR_IDENT |
3758 | #undef DEF_ATTR_TREE_LIST | |
8fe4a266 | 3759 | ATTR_LAST |
3760 | }; | |
3761 | ||
3762 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
3763 | ||
1cae46be | 3764 | static void c_init_attributes (void); |
8fe4a266 | 3765 | |
27213ba3 | 3766 | enum c_builtin_type |
72040e7e | 3767 | { |
d2d4bdde | 3768 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
3769 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
3770 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
3771 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
3772 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
3773 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
0a39fd54 | 3774 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
3c77ca67 | 3775 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3776 | ARG6) NAME, | |
3777 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3778 | ARG6, ARG7) NAME, | |
3779 | #define DEF_FUNCTION_TYPE_8(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3780 | ARG6, ARG7, ARG8) NAME, | |
43895be5 | 3781 | #define DEF_FUNCTION_TYPE_9(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3782 | ARG6, ARG7, ARG8, ARG9) NAME, | |
3783 | #define DEF_FUNCTION_TYPE_10(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3784 | ARG6, ARG7, ARG8, ARG9, ARG10) NAME, | |
3785 | #define DEF_FUNCTION_TYPE_11(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3786 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) NAME, | |
d2d4bdde | 3787 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
3788 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
3789 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
03901330 | 3790 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
0a39fd54 | 3791 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
3c77ca67 | 3792 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ |
6349b8cc | 3793 | NAME, |
e561d5e1 | 3794 | #define DEF_FUNCTION_TYPE_VAR_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3795 | ARG6) NAME, | |
6349b8cc | 3796 | #define DEF_FUNCTION_TYPE_VAR_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3797 | ARG6, ARG7) NAME, | |
d2d4bdde | 3798 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
3799 | #include "builtin-types.def" | |
3800 | #undef DEF_PRIMITIVE_TYPE | |
3801 | #undef DEF_FUNCTION_TYPE_0 | |
3802 | #undef DEF_FUNCTION_TYPE_1 | |
3803 | #undef DEF_FUNCTION_TYPE_2 | |
3804 | #undef DEF_FUNCTION_TYPE_3 | |
3805 | #undef DEF_FUNCTION_TYPE_4 | |
0a39fd54 | 3806 | #undef DEF_FUNCTION_TYPE_5 |
3807 | #undef DEF_FUNCTION_TYPE_6 | |
27213ba3 | 3808 | #undef DEF_FUNCTION_TYPE_7 |
bc7bff74 | 3809 | #undef DEF_FUNCTION_TYPE_8 |
43895be5 | 3810 | #undef DEF_FUNCTION_TYPE_9 |
3811 | #undef DEF_FUNCTION_TYPE_10 | |
3812 | #undef DEF_FUNCTION_TYPE_11 | |
d2d4bdde | 3813 | #undef DEF_FUNCTION_TYPE_VAR_0 |
3814 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
3815 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
03901330 | 3816 | #undef DEF_FUNCTION_TYPE_VAR_3 |
0a39fd54 | 3817 | #undef DEF_FUNCTION_TYPE_VAR_4 |
3818 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
e561d5e1 | 3819 | #undef DEF_FUNCTION_TYPE_VAR_6 |
6349b8cc | 3820 | #undef DEF_FUNCTION_TYPE_VAR_7 |
d2d4bdde | 3821 | #undef DEF_POINTER_TYPE |
27213ba3 | 3822 | BT_LAST |
3823 | }; | |
3824 | ||
3825 | typedef enum c_builtin_type builtin_type; | |
d2d4bdde | 3826 | |
27213ba3 | 3827 | /* A temporary array for c_common_nodes_and_builtins. Used in |
3828 | communication with def_fn_type. */ | |
3829 | static tree builtin_types[(int) BT_LAST + 1]; | |
d2d4bdde | 3830 | |
27213ba3 | 3831 | /* A helper function for c_common_nodes_and_builtins. Build function type |
3832 | for DEF with return type RET and N arguments. If VAR is true, then the | |
3833 | function should be variadic after those N arguments. | |
3834 | ||
3835 | Takes special care not to ICE if any of the types involved are | |
3836 | error_mark_node, which indicates that said type is not in fact available | |
3837 | (see builtin_type_for_size). In which case the function type as a whole | |
3838 | should be error_mark_node. */ | |
3839 | ||
3840 | static void | |
3841 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
3842 | { | |
3a939d12 | 3843 | tree t; |
3844 | tree *args = XALLOCAVEC (tree, n); | |
27213ba3 | 3845 | va_list list; |
3846 | int i; | |
3847 | ||
3848 | va_start (list, n); | |
3849 | for (i = 0; i < n; ++i) | |
3850 | { | |
7d339f93 | 3851 | builtin_type a = (builtin_type) va_arg (list, int); |
27213ba3 | 3852 | t = builtin_types[a]; |
3853 | if (t == error_mark_node) | |
3854 | goto egress; | |
3a939d12 | 3855 | args[i] = t; |
27213ba3 | 3856 | } |
27213ba3 | 3857 | |
27213ba3 | 3858 | t = builtin_types[ret]; |
3859 | if (t == error_mark_node) | |
3860 | goto egress; | |
3a939d12 | 3861 | if (var) |
3862 | t = build_varargs_function_type_array (t, n, args); | |
3863 | else | |
3864 | t = build_function_type_array (t, n, args); | |
27213ba3 | 3865 | |
3866 | egress: | |
3867 | builtin_types[def] = t; | |
451c8e2f | 3868 | va_end (list); |
27213ba3 | 3869 | } |
3870 | ||
dce22712 | 3871 | /* Build builtin functions common to both C and C++ language |
3872 | frontends. */ | |
3873 | ||
3874 | static void | |
3875 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
3876 | { | |
3877 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
3878 | builtin_types[ENUM] = VALUE; | |
3879 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
3880 | def_fn_type (ENUM, RETURN, 0, 0); | |
3881 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
3882 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
3883 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
3884 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
3885 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
3886 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
3887 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
3888 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
3889 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
3890 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
3891 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3892 | ARG6) \ | |
3893 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
3894 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3895 | ARG6, ARG7) \ | |
3896 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
bc7bff74 | 3897 | #define DEF_FUNCTION_TYPE_8(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3898 | ARG6, ARG7, ARG8) \ | |
3899 | def_fn_type (ENUM, RETURN, 0, 8, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
3900 | ARG7, ARG8); | |
43895be5 | 3901 | #define DEF_FUNCTION_TYPE_9(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3902 | ARG6, ARG7, ARG8, ARG9) \ | |
3903 | def_fn_type (ENUM, RETURN, 0, 9, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
3904 | ARG7, ARG8, ARG9); | |
3905 | #define DEF_FUNCTION_TYPE_10(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3906 | ARG6, ARG7, ARG8, ARG9, ARG10) \ | |
3907 | def_fn_type (ENUM, RETURN, 0, 10, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
3908 | ARG7, ARG8, ARG9, ARG10); | |
3909 | #define DEF_FUNCTION_TYPE_11(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3910 | ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) \ | |
3911 | def_fn_type (ENUM, RETURN, 0, 11, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \ | |
3912 | ARG7, ARG8, ARG9, ARG10, ARG11); | |
dce22712 | 3913 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ |
3914 | def_fn_type (ENUM, RETURN, 1, 0); | |
3915 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
3916 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
3917 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
3918 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
3919 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
3920 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
3921 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
3922 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
3923 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
3924 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
e561d5e1 | 3925 | #define DEF_FUNCTION_TYPE_VAR_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3926 | ARG6) \ | |
3927 | def_fn_type (ENUM, RETURN, 1, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
6349b8cc | 3928 | #define DEF_FUNCTION_TYPE_VAR_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ |
3929 | ARG6, ARG7) \ | |
3930 | def_fn_type (ENUM, RETURN, 1, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
dce22712 | 3931 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ |
3932 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
3933 | ||
3934 | #include "builtin-types.def" | |
3935 | ||
3936 | #undef DEF_PRIMITIVE_TYPE | |
3c77ca67 | 3937 | #undef DEF_FUNCTION_TYPE_0 |
dce22712 | 3938 | #undef DEF_FUNCTION_TYPE_1 |
3939 | #undef DEF_FUNCTION_TYPE_2 | |
3940 | #undef DEF_FUNCTION_TYPE_3 | |
3941 | #undef DEF_FUNCTION_TYPE_4 | |
3942 | #undef DEF_FUNCTION_TYPE_5 | |
3943 | #undef DEF_FUNCTION_TYPE_6 | |
3c77ca67 | 3944 | #undef DEF_FUNCTION_TYPE_7 |
3945 | #undef DEF_FUNCTION_TYPE_8 | |
43895be5 | 3946 | #undef DEF_FUNCTION_TYPE_9 |
3947 | #undef DEF_FUNCTION_TYPE_10 | |
3948 | #undef DEF_FUNCTION_TYPE_11 | |
dce22712 | 3949 | #undef DEF_FUNCTION_TYPE_VAR_0 |
3950 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
3951 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
3952 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
3953 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
3954 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
e561d5e1 | 3955 | #undef DEF_FUNCTION_TYPE_VAR_6 |
6349b8cc | 3956 | #undef DEF_FUNCTION_TYPE_VAR_7 |
dce22712 | 3957 | #undef DEF_POINTER_TYPE |
3958 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
3959 | ||
3960 | c_init_attributes (); | |
3961 | ||
3962 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
3963 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
3964 | if (NAME && COND) \ | |
3965 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
3966 | builtin_types[(int) TYPE], \ | |
3967 | builtin_types[(int) LIBTYPE], \ | |
3968 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
3969 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
3970 | #include "builtins.def" | |
dce22712 | 3971 | |
87eb1c28 | 3972 | targetm.init_builtins (); |
3973 | ||
471eff36 | 3974 | build_common_builtin_nodes (); |
dce22712 | 3975 | } |
3976 | ||
9e6687c8 | 3977 | /* Like get_identifier, but avoid warnings about null arguments when |
3978 | the argument may be NULL for targets where GCC lacks stdint.h type | |
3979 | information. */ | |
3980 | ||
3981 | static inline tree | |
3982 | c_get_ident (const char *id) | |
3983 | { | |
3984 | return get_identifier (id); | |
3985 | } | |
3986 | ||
27213ba3 | 3987 | /* Build tree nodes and builtin functions common to both C and C++ language |
3988 | frontends. */ | |
3989 | ||
3990 | void | |
3991 | c_common_nodes_and_builtins (void) | |
3992 | { | |
82362779 | 3993 | int char8_type_size; |
924bbf02 | 3994 | int char16_type_size; |
3995 | int char32_type_size; | |
174fcc61 | 3996 | int wchar_type_size; |
3997 | tree array_domain_type; | |
2d47cc32 | 3998 | tree va_list_ref_type_node; |
8a15c04a | 3999 | tree va_list_arg_type_node; |
9f75f026 | 4000 | int i; |
a66c9326 | 4001 | |
600695e0 | 4002 | build_common_tree_nodes (flag_signed_char); |
e593356b | 4003 | |
174fcc61 | 4004 | /* Define `int' and `char' first so that dbx will output them first. */ |
d946ea19 | 4005 | record_builtin_type (RID_INT, NULL, integer_type_node); |
174fcc61 | 4006 | record_builtin_type (RID_CHAR, "char", char_type_node); |
4007 | ||
4008 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
4009 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
4010 | but not C. Are the conditionals here needed? */ | |
c0f19401 | 4011 | if (c_dialect_cxx ()) |
d946ea19 | 4012 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
174fcc61 | 4013 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
4014 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
4015 | record_builtin_type (RID_MAX, "long unsigned int", | |
4016 | long_unsigned_type_node); | |
9f75f026 | 4017 | |
4018 | for (i = 0; i < NUM_INT_N_ENTS; i ++) | |
6388cfe2 | 4019 | { |
9f75f026 | 4020 | char name[25]; |
4021 | ||
4022 | sprintf (name, "__int%d", int_n_data[i].bitsize); | |
76738f56 | 4023 | record_builtin_type ((enum rid)(RID_FIRST_INT_N + i), name, |
9f75f026 | 4024 | int_n_trees[i].signed_type); |
4025 | sprintf (name, "__int%d unsigned", int_n_data[i].bitsize); | |
76738f56 | 4026 | record_builtin_type (RID_MAX, name, int_n_trees[i].unsigned_type); |
6388cfe2 | 4027 | } |
9f75f026 | 4028 | |
c0f19401 | 4029 | if (c_dialect_cxx ()) |
174fcc61 | 4030 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
4031 | record_builtin_type (RID_MAX, "long long int", | |
4032 | long_long_integer_type_node); | |
4033 | record_builtin_type (RID_MAX, "long long unsigned int", | |
4034 | long_long_unsigned_type_node); | |
c0f19401 | 4035 | if (c_dialect_cxx ()) |
174fcc61 | 4036 | record_builtin_type (RID_MAX, "long long unsigned", |
4037 | long_long_unsigned_type_node); | |
4038 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
4039 | record_builtin_type (RID_MAX, "short unsigned int", | |
4040 | short_unsigned_type_node); | |
c0f19401 | 4041 | if (c_dialect_cxx ()) |
174fcc61 | 4042 | record_builtin_type (RID_MAX, "unsigned short", |
4043 | short_unsigned_type_node); | |
4044 | ||
4045 | /* Define both `signed char' and `unsigned char'. */ | |
4046 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
4047 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
4048 | ||
771d21fa | 4049 | /* These are types that c_common_type_for_size and |
4050 | c_common_type_for_mode use. */ | |
e60a6f7b | 4051 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4052 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4053 | intQI_type_node)); |
e60a6f7b | 4054 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4055 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4056 | intHI_type_node)); |
e60a6f7b | 4057 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4058 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4059 | intSI_type_node)); |
e60a6f7b | 4060 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4061 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4062 | intDI_type_node)); |
174fcc61 | 4063 | #if HOST_BITS_PER_WIDE_INT >= 64 |
9f75f026 | 4064 | /* Note that this is different than the __int128 type that's part of |
4065 | the generic __intN support. */ | |
f1515a39 | 4066 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 4067 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4068 | TYPE_DECL, | |
f1515a39 | 4069 | get_identifier ("__int128_t"), |
4070 | intTI_type_node)); | |
174fcc61 | 4071 | #endif |
e60a6f7b | 4072 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4073 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4074 | unsigned_intQI_type_node)); |
e60a6f7b | 4075 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4076 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4077 | unsigned_intHI_type_node)); |
e60a6f7b | 4078 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4079 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4080 | unsigned_intSI_type_node)); |
e60a6f7b | 4081 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4082 | TYPE_DECL, NULL_TREE, | |
dc24ddbd | 4083 | unsigned_intDI_type_node)); |
174fcc61 | 4084 | #if HOST_BITS_PER_WIDE_INT >= 64 |
f1515a39 | 4085 | if (targetm.scalar_mode_supported_p (TImode)) |
e60a6f7b | 4086 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4087 | TYPE_DECL, | |
f1515a39 | 4088 | get_identifier ("__uint128_t"), |
4089 | unsigned_intTI_type_node)); | |
174fcc61 | 4090 | #endif |
4091 | ||
4092 | /* Create the widest literal types. */ | |
7ec2cbc9 | 4093 | if (targetm.scalar_mode_supported_p (TImode)) |
4094 | { | |
4095 | widest_integer_literal_type_node = intTI_type_node; | |
4096 | widest_unsigned_literal_type_node = unsigned_intTI_type_node; | |
4097 | } | |
4098 | else | |
4099 | { | |
4100 | widest_integer_literal_type_node = intDI_type_node; | |
4101 | widest_unsigned_literal_type_node = unsigned_intDI_type_node; | |
4102 | } | |
174fcc61 | 4103 | |
654ef926 | 4104 | signed_size_type_node = c_common_signed_type (size_type_node); |
174fcc61 | 4105 | |
73673831 | 4106 | pid_type_node = |
4107 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
4108 | ||
d946ea19 | 4109 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
4110 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
174fcc61 | 4111 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
4112 | ||
82c85aba | 4113 | if (!c_dialect_cxx ()) |
4114 | for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) | |
4115 | if (FLOATN_NX_TYPE_NODE (i) != NULL_TREE) | |
4116 | record_builtin_type ((enum rid) (RID_FLOATN_NX_FIRST + i), NULL, | |
4117 | FLOATN_NX_TYPE_NODE (i)); | |
4118 | ||
c4503c0a | 4119 | /* Only supported decimal floating point extension if the target |
4120 | actually supports underlying modes. */ | |
48e1416a | 4121 | if (targetm.scalar_mode_supported_p (SDmode) |
c4503c0a | 4122 | && targetm.scalar_mode_supported_p (DDmode) |
4123 | && targetm.scalar_mode_supported_p (TDmode)) | |
4124 | { | |
4125 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
4126 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
4127 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
4128 | } | |
4129 | ||
9421ebb9 | 4130 | if (targetm.fixed_point_supported_p ()) |
4131 | { | |
4132 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
4133 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
4134 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
4135 | record_builtin_type (RID_MAX, "long long _Fract", | |
4136 | long_long_fract_type_node); | |
4137 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
4138 | unsigned_short_fract_type_node); | |
4139 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
4140 | unsigned_fract_type_node); | |
4141 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
4142 | unsigned_long_fract_type_node); | |
4143 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
4144 | unsigned_long_long_fract_type_node); | |
4145 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
4146 | sat_short_fract_type_node); | |
4147 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
4148 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
4149 | sat_long_fract_type_node); | |
4150 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
4151 | sat_long_long_fract_type_node); | |
4152 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
4153 | sat_unsigned_short_fract_type_node); | |
4154 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
4155 | sat_unsigned_fract_type_node); | |
4156 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
4157 | sat_unsigned_long_fract_type_node); | |
4158 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
4159 | sat_unsigned_long_long_fract_type_node); | |
4160 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
4161 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
4162 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
4163 | record_builtin_type (RID_MAX, "long long _Accum", | |
4164 | long_long_accum_type_node); | |
4165 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
4166 | unsigned_short_accum_type_node); | |
4167 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
4168 | unsigned_accum_type_node); | |
4169 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
4170 | unsigned_long_accum_type_node); | |
4171 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
4172 | unsigned_long_long_accum_type_node); | |
4173 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
4174 | sat_short_accum_type_node); | |
4175 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
4176 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
4177 | sat_long_accum_type_node); | |
4178 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
4179 | sat_long_long_accum_type_node); | |
4180 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
4181 | sat_unsigned_short_accum_type_node); | |
4182 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
4183 | sat_unsigned_accum_type_node); | |
4184 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
4185 | sat_unsigned_long_accum_type_node); | |
4186 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
4187 | sat_unsigned_long_long_accum_type_node); | |
4188 | ||
4189 | } | |
4190 | ||
e60a6f7b | 4191 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4192 | TYPE_DECL, | |
dc24ddbd | 4193 | get_identifier ("complex int"), |
4194 | complex_integer_type_node)); | |
e60a6f7b | 4195 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4196 | TYPE_DECL, | |
dc24ddbd | 4197 | get_identifier ("complex float"), |
4198 | complex_float_type_node)); | |
e60a6f7b | 4199 | lang_hooks.decls.pushdecl (build_decl (UNKNOWN_LOCATION, |
4200 | TYPE_DECL, | |
dc24ddbd | 4201 | get_identifier ("complex double"), |
4202 | complex_double_type_node)); | |
4203 | lang_hooks.decls.pushdecl | |
e60a6f7b | 4204 | (build_decl (UNKNOWN_LOCATION, |
4205 | TYPE_DECL, get_identifier ("complex long double"), | |
20325f61 | 4206 | complex_long_double_type_node)); |
174fcc61 | 4207 | |
82c85aba | 4208 | if (!c_dialect_cxx ()) |
4209 | for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) | |
4210 | if (COMPLEX_FLOATN_NX_TYPE_NODE (i) != NULL_TREE) | |
4211 | { | |
4212 | char buf[30]; | |
4213 | sprintf (buf, "complex _Float%d%s", floatn_nx_types[i].n, | |
4214 | floatn_nx_types[i].extended ? "x" : ""); | |
4215 | lang_hooks.decls.pushdecl | |
4216 | (build_decl (UNKNOWN_LOCATION, | |
4217 | TYPE_DECL, | |
4218 | get_identifier (buf), | |
4219 | COMPLEX_FLOATN_NX_TYPE_NODE (i))); | |
4220 | } | |
4221 | ||
a456bf31 | 4222 | /* Make fileptr_type_node a distinct void * type until |
4223 | FILE type is defined. Likewise for const struct tm*. */ | |
4224 | for (unsigned i = 0; | |
4225 | i < sizeof (builtin_structptr_types) / sizeof (builtin_structptr_type); | |
4226 | ++i) | |
4227 | builtin_structptr_types[i].node | |
4228 | = build_variant_type_copy (builtin_structptr_types[i].base); | |
e256d445 | 4229 | |
d946ea19 | 4230 | record_builtin_type (RID_VOID, NULL, void_type_node); |
174fcc61 | 4231 | |
6753bca0 | 4232 | /* Set the TYPE_NAME for any variants that were built before |
4233 | record_builtin_type gave names to the built-in types. */ | |
4234 | { | |
4235 | tree void_name = TYPE_NAME (void_type_node); | |
4236 | TYPE_NAME (void_type_node) = NULL_TREE; | |
4237 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
4238 | = void_name; | |
4239 | TYPE_NAME (void_type_node) = void_name; | |
4240 | } | |
4241 | ||
174fcc61 | 4242 | void_list_node = build_void_list_node (); |
4243 | ||
4244 | /* Make a type to be the domain of a few array types | |
4245 | whose domains don't really matter. | |
4246 | 200 is small enough that it always fits in size_t | |
4247 | and large enough that it can hold most function names for the | |
4248 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
4249 | array_domain_type = build_index_type (size_int (200)); | |
4250 | ||
4251 | /* Make a type for arrays of characters. | |
4252 | With luck nothing will ever really depend on the length of this | |
4253 | array type. */ | |
4254 | char_array_type_node | |
4255 | = build_array_type (char_type_node, array_domain_type); | |
4256 | ||
d2d4bdde | 4257 | string_type_node = build_pointer_type (char_type_node); |
4258 | const_string_type_node | |
4259 | = build_pointer_type (build_qualified_type | |
4260 | (char_type_node, TYPE_QUAL_CONST)); | |
4261 | ||
174fcc61 | 4262 | /* This is special for C++ so functions can be overloaded. */ |
18ef7ac2 | 4263 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
174fcc61 | 4264 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
4265 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
f3449a3c | 4266 | underlying_wchar_type_node = wchar_type_node; |
c0f19401 | 4267 | if (c_dialect_cxx ()) |
174fcc61 | 4268 | { |
78a8ed03 | 4269 | if (TYPE_UNSIGNED (wchar_type_node)) |
174fcc61 | 4270 | wchar_type_node = make_unsigned_type (wchar_type_size); |
4271 | else | |
4272 | wchar_type_node = make_signed_type (wchar_type_size); | |
4273 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
4274 | } | |
174fcc61 | 4275 | |
4276 | /* This is for wide string constants. */ | |
4277 | wchar_array_type_node | |
4278 | = build_array_type (wchar_type_node, array_domain_type); | |
4279 | ||
82362779 | 4280 | /* Define 'char8_t'. */ |
4281 | char8_type_node = get_identifier (CHAR8_TYPE); | |
4282 | char8_type_node = TREE_TYPE (identifier_global_value (char8_type_node)); | |
4283 | char8_type_size = TYPE_PRECISION (char8_type_node); | |
4284 | if (c_dialect_cxx ()) | |
4285 | { | |
4286 | char8_type_node = make_unsigned_type (char8_type_size); | |
4287 | ||
4288 | if (flag_char8_t) | |
4289 | record_builtin_type (RID_CHAR8, "char8_t", char8_type_node); | |
4290 | } | |
4291 | ||
4292 | /* This is for UTF-8 string constants. */ | |
4293 | char8_array_type_node | |
4294 | = build_array_type (char8_type_node, array_domain_type); | |
4295 | ||
924bbf02 | 4296 | /* Define 'char16_t'. */ |
4297 | char16_type_node = get_identifier (CHAR16_TYPE); | |
4298 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
4299 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
4300 | if (c_dialect_cxx ()) | |
4301 | { | |
4302 | char16_type_node = make_unsigned_type (char16_type_size); | |
4303 | ||
60777f69 | 4304 | if (cxx_dialect >= cxx11) |
924bbf02 | 4305 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); |
4306 | } | |
4307 | ||
4308 | /* This is for UTF-16 string constants. */ | |
4309 | char16_array_type_node | |
4310 | = build_array_type (char16_type_node, array_domain_type); | |
4311 | ||
4312 | /* Define 'char32_t'. */ | |
4313 | char32_type_node = get_identifier (CHAR32_TYPE); | |
4314 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
4315 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
4316 | if (c_dialect_cxx ()) | |
4317 | { | |
4318 | char32_type_node = make_unsigned_type (char32_type_size); | |
4319 | ||
60777f69 | 4320 | if (cxx_dialect >= cxx11) |
924bbf02 | 4321 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); |
4322 | } | |
4323 | ||
4324 | /* This is for UTF-32 string constants. */ | |
4325 | char32_array_type_node | |
4326 | = build_array_type (char32_type_node, array_domain_type); | |
4327 | ||
6bf5ed8d | 4328 | wint_type_node = |
4329 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
4330 | ||
4331 | intmax_type_node = | |
4332 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
4333 | uintmax_type_node = | |
4334 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
4335 | ||
f3449a3c | 4336 | if (SIG_ATOMIC_TYPE) |
4337 | sig_atomic_type_node = | |
9e6687c8 | 4338 | TREE_TYPE (identifier_global_value (c_get_ident (SIG_ATOMIC_TYPE))); |
f3449a3c | 4339 | if (INT8_TYPE) |
4340 | int8_type_node = | |
9e6687c8 | 4341 | TREE_TYPE (identifier_global_value (c_get_ident (INT8_TYPE))); |
f3449a3c | 4342 | if (INT16_TYPE) |
4343 | int16_type_node = | |
9e6687c8 | 4344 | TREE_TYPE (identifier_global_value (c_get_ident (INT16_TYPE))); |
f3449a3c | 4345 | if (INT32_TYPE) |
4346 | int32_type_node = | |
9e6687c8 | 4347 | TREE_TYPE (identifier_global_value (c_get_ident (INT32_TYPE))); |
f3449a3c | 4348 | if (INT64_TYPE) |
4349 | int64_type_node = | |
9e6687c8 | 4350 | TREE_TYPE (identifier_global_value (c_get_ident (INT64_TYPE))); |
f3449a3c | 4351 | if (UINT8_TYPE) |
4352 | uint8_type_node = | |
9e6687c8 | 4353 | TREE_TYPE (identifier_global_value (c_get_ident (UINT8_TYPE))); |
f3449a3c | 4354 | if (UINT16_TYPE) |
d1081017 | 4355 | c_uint16_type_node = uint16_type_node = |
9e6687c8 | 4356 | TREE_TYPE (identifier_global_value (c_get_ident (UINT16_TYPE))); |
f3449a3c | 4357 | if (UINT32_TYPE) |
d1081017 | 4358 | c_uint32_type_node = uint32_type_node = |
9e6687c8 | 4359 | TREE_TYPE (identifier_global_value (c_get_ident (UINT32_TYPE))); |
f3449a3c | 4360 | if (UINT64_TYPE) |
d1081017 | 4361 | c_uint64_type_node = uint64_type_node = |
9e6687c8 | 4362 | TREE_TYPE (identifier_global_value (c_get_ident (UINT64_TYPE))); |
f3449a3c | 4363 | if (INT_LEAST8_TYPE) |
4364 | int_least8_type_node = | |
9e6687c8 | 4365 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST8_TYPE))); |
f3449a3c | 4366 | if (INT_LEAST16_TYPE) |
4367 | int_least16_type_node = | |
9e6687c8 | 4368 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST16_TYPE))); |
f3449a3c | 4369 | if (INT_LEAST32_TYPE) |
4370 | int_least32_type_node = | |
9e6687c8 | 4371 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST32_TYPE))); |
f3449a3c | 4372 | if (INT_LEAST64_TYPE) |
4373 | int_least64_type_node = | |
9e6687c8 | 4374 | TREE_TYPE (identifier_global_value (c_get_ident (INT_LEAST64_TYPE))); |
f3449a3c | 4375 | if (UINT_LEAST8_TYPE) |
4376 | uint_least8_type_node = | |
9e6687c8 | 4377 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST8_TYPE))); |
f3449a3c | 4378 | if (UINT_LEAST16_TYPE) |
4379 | uint_least16_type_node = | |
9e6687c8 | 4380 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST16_TYPE))); |
f3449a3c | 4381 | if (UINT_LEAST32_TYPE) |
4382 | uint_least32_type_node = | |
9e6687c8 | 4383 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST32_TYPE))); |
f3449a3c | 4384 | if (UINT_LEAST64_TYPE) |
4385 | uint_least64_type_node = | |
9e6687c8 | 4386 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_LEAST64_TYPE))); |
f3449a3c | 4387 | if (INT_FAST8_TYPE) |
4388 | int_fast8_type_node = | |
9e6687c8 | 4389 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST8_TYPE))); |
f3449a3c | 4390 | if (INT_FAST16_TYPE) |
4391 | int_fast16_type_node = | |
9e6687c8 | 4392 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST16_TYPE))); |
f3449a3c | 4393 | if (INT_FAST32_TYPE) |
4394 | int_fast32_type_node = | |
9e6687c8 | 4395 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST32_TYPE))); |
f3449a3c | 4396 | if (INT_FAST64_TYPE) |
4397 | int_fast64_type_node = | |
9e6687c8 | 4398 | TREE_TYPE (identifier_global_value (c_get_ident (INT_FAST64_TYPE))); |
f3449a3c | 4399 | if (UINT_FAST8_TYPE) |
4400 | uint_fast8_type_node = | |
9e6687c8 | 4401 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST8_TYPE))); |
f3449a3c | 4402 | if (UINT_FAST16_TYPE) |
4403 | uint_fast16_type_node = | |
9e6687c8 | 4404 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST16_TYPE))); |
f3449a3c | 4405 | if (UINT_FAST32_TYPE) |
4406 | uint_fast32_type_node = | |
9e6687c8 | 4407 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST32_TYPE))); |
f3449a3c | 4408 | if (UINT_FAST64_TYPE) |
4409 | uint_fast64_type_node = | |
9e6687c8 | 4410 | TREE_TYPE (identifier_global_value (c_get_ident (UINT_FAST64_TYPE))); |
f3449a3c | 4411 | if (INTPTR_TYPE) |
4412 | intptr_type_node = | |
9e6687c8 | 4413 | TREE_TYPE (identifier_global_value (c_get_ident (INTPTR_TYPE))); |
f3449a3c | 4414 | if (UINTPTR_TYPE) |
4415 | uintptr_type_node = | |
9e6687c8 | 4416 | TREE_TYPE (identifier_global_value (c_get_ident (UINTPTR_TYPE))); |
f3449a3c | 4417 | |
3a939d12 | 4418 | default_function_type |
4419 | = build_varargs_function_type_list (integer_type_node, NULL_TREE); | |
11773141 | 4420 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
6bf5ed8d | 4421 | |
dc24ddbd | 4422 | lang_hooks.decls.pushdecl |
e60a6f7b | 4423 | (build_decl (UNKNOWN_LOCATION, |
4424 | TYPE_DECL, get_identifier ("__builtin_va_list"), | |
20325f61 | 4425 | va_list_type_node)); |
202d6e5f | 4426 | if (targetm.enum_va_list_p) |
acd6f472 | 4427 | { |
4428 | int l; | |
4429 | const char *pname; | |
4430 | tree ptype; | |
5f57a8b1 | 4431 | |
202d6e5f | 4432 | for (l = 0; targetm.enum_va_list_p (l, &pname, &ptype); ++l) |
acd6f472 | 4433 | { |
4434 | lang_hooks.decls.pushdecl | |
4435 | (build_decl (UNKNOWN_LOCATION, | |
4436 | TYPE_DECL, get_identifier (pname), | |
4437 | ptype)); | |
ab2c1de8 | 4438 | |
acd6f472 | 4439 | } |
4440 | } | |
8a15c04a | 4441 | |
8a15c04a | 4442 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
2d47cc32 | 4443 | { |
4444 | va_list_arg_type_node = va_list_ref_type_node = | |
4445 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
4446 | } | |
8a15c04a | 4447 | else |
2d47cc32 | 4448 | { |
4449 | va_list_arg_type_node = va_list_type_node; | |
4450 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
4451 | } | |
1cae46be | 4452 | |
dce22712 | 4453 | if (!flag_preprocess_only) |
4454 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
ffa8918b | 4455 | |
5c62f199 | 4456 | main_identifier_node = get_identifier ("main"); |
ae84079f | 4457 | |
4458 | /* Create the built-in __null node. It is important that this is | |
4459 | not shared. */ | |
271e739a | 4460 | null_node = make_int_cst (1, 1); |
ae84079f | 4461 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); |
27213ba3 | 4462 | |
4463 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
4464 | memset (builtin_types, 0, sizeof (builtin_types)); | |
72040e7e | 4465 | } |
a66c9326 | 4466 | |
79b01846 | 4467 | /* The number of named compound-literals generated thus far. */ |
4468 | static GTY(()) int compound_literal_number; | |
4469 | ||
4470 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
4471 | ||
4472 | void | |
4473 | set_compound_literal_name (tree decl) | |
4474 | { | |
4475 | char *name; | |
4476 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
4477 | compound_literal_number); | |
4478 | compound_literal_number++; | |
4479 | DECL_NAME (decl) = get_identifier (name); | |
4480 | } | |
4481 | ||
2e474820 | 4482 | /* build_va_arg helper function. Return a VA_ARG_EXPR with location LOC, type |
4483 | TYPE and operand OP. */ | |
4484 | ||
4485 | static tree | |
4486 | build_va_arg_1 (location_t loc, tree type, tree op) | |
4487 | { | |
4488 | tree expr = build1 (VA_ARG_EXPR, type, op); | |
4489 | SET_EXPR_LOCATION (expr, loc); | |
4490 | return expr; | |
4491 | } | |
4492 | ||
4493 | /* Return a VA_ARG_EXPR corresponding to a source-level expression | |
4494 | va_arg (EXPR, TYPE) at source location LOC. */ | |
4495 | ||
a66c9326 | 4496 | tree |
e60a6f7b | 4497 | build_va_arg (location_t loc, tree expr, tree type) |
a66c9326 | 4498 | { |
c37be9ec | 4499 | tree va_type = TREE_TYPE (expr); |
4500 | tree canon_va_type = (va_type == error_mark_node | |
ea2ec8f6 | 4501 | ? error_mark_node |
c37be9ec | 4502 | : targetm.canonical_va_list_type (va_type)); |
4503 | ||
2e474820 | 4504 | if (va_type == error_mark_node |
4505 | || canon_va_type == NULL_TREE) | |
c37be9ec | 4506 | { |
ea2ec8f6 | 4507 | if (canon_va_type == NULL_TREE) |
4508 | error_at (loc, "first argument to %<va_arg%> not of type %<va_list%>"); | |
4509 | ||
2e474820 | 4510 | /* Let's handle things neutrallly, if expr: |
4511 | - has undeclared type, or | |
4512 | - is not an va_list type. */ | |
ea2ec8f6 | 4513 | return build_va_arg_1 (loc, type, error_mark_node); |
c37be9ec | 4514 | } |
f7fec1c7 | 4515 | |
2e474820 | 4516 | if (TREE_CODE (canon_va_type) != ARRAY_TYPE) |
4517 | { | |
4518 | /* Case 1: Not an array type. */ | |
4519 | ||
3bb45f76 | 4520 | /* Take the address, to get '&ap'. Note that &ap is not a va_list |
4521 | type. */ | |
2e474820 | 4522 | mark_addressable (expr); |
4523 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (expr)), expr); | |
4524 | ||
2e474820 | 4525 | return build_va_arg_1 (loc, type, expr); |
4526 | } | |
4527 | ||
4528 | /* Case 2: Array type. | |
4529 | ||
4530 | Background: | |
4531 | ||
4532 | For contrast, let's start with the simple case (case 1). If | |
4533 | canon_va_type is not an array type, but say a char *, then when | |
4534 | passing-by-value a va_list, the type of the va_list param decl is | |
4535 | the same as for another va_list decl (all ap's are char *): | |
4536 | ||
4537 | f2_1 (char * ap) | |
4538 | D.1815 = VA_ARG (&ap, 0B, 1); | |
4539 | return D.1815; | |
4540 | ||
4541 | f2 (int i) | |
4542 | char * ap.0; | |
4543 | char * ap; | |
4544 | __builtin_va_start (&ap, 0); | |
4545 | ap.0 = ap; | |
4546 | res = f2_1 (ap.0); | |
4547 | __builtin_va_end (&ap); | |
4548 | D.1812 = res; | |
4549 | return D.1812; | |
4550 | ||
4551 | However, if canon_va_type is ARRAY_TYPE, then when passing-by-value a | |
4552 | va_list the type of the va_list param decl (case 2b, struct * ap) is not | |
4553 | the same as for another va_list decl (case 2a, struct ap[1]). | |
4554 | ||
4555 | f2_1 (struct * ap) | |
4556 | D.1844 = VA_ARG (ap, 0B, 0); | |
4557 | return D.1844; | |
4558 | ||
4559 | f2 (int i) | |
4560 | struct ap[1]; | |
4561 | __builtin_va_start (&ap, 0); | |
4562 | res = f2_1 (&ap); | |
4563 | __builtin_va_end (&ap); | |
4564 | D.1841 = res; | |
4565 | return D.1841; | |
4566 | ||
4567 | Case 2b is different because: | |
4568 | - on the callee side, the parm decl has declared type va_list, but | |
4569 | grokdeclarator changes the type of the parm decl to a pointer to the | |
4570 | array elem type. | |
4571 | - on the caller side, the pass-by-value uses &ap. | |
4572 | ||
4573 | We unify these two cases (case 2a: va_list is array type, | |
4574 | case 2b: va_list is pointer to array elem type), by adding '&' for the | |
4575 | array type case, such that we have a pointer to array elem in both | |
4576 | cases. */ | |
4577 | ||
4578 | if (TREE_CODE (va_type) == ARRAY_TYPE) | |
4579 | { | |
4580 | /* Case 2a: va_list is array type. */ | |
4581 | ||
4582 | /* Take the address, to get '&ap'. Make sure it's a pointer to array | |
4583 | elem type. */ | |
4584 | mark_addressable (expr); | |
4585 | expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (canon_va_type)), | |
4586 | expr); | |
4587 | ||
4588 | /* Verify that &ap is still recognized as having va_list type. */ | |
4589 | tree canon_expr_type | |
4590 | = targetm.canonical_va_list_type (TREE_TYPE (expr)); | |
3bb45f76 | 4591 | gcc_assert (canon_expr_type != NULL_TREE); |
2e474820 | 4592 | } |
4593 | else | |
4594 | { | |
4595 | /* Case 2b: va_list is pointer to array elem type. */ | |
4596 | gcc_assert (POINTER_TYPE_P (va_type)); | |
839e4d28 | 4597 | |
4598 | /* Comparison as in std_canonical_va_list_type. */ | |
4599 | gcc_assert (TYPE_MAIN_VARIANT (TREE_TYPE (va_type)) | |
4600 | == TYPE_MAIN_VARIANT (TREE_TYPE (canon_va_type))); | |
2e474820 | 4601 | |
4602 | /* Don't take the address. We've already got '&ap'. */ | |
4603 | ; | |
4604 | } | |
4605 | ||
4606 | return build_va_arg_1 (loc, type, expr); | |
a66c9326 | 4607 | } |
0d4238dc | 4608 | |
4609 | ||
dd878098 | 4610 | /* Linked list of disabled built-in functions. */ |
4611 | ||
6dc50383 | 4612 | struct disabled_builtin |
dd878098 | 4613 | { |
4614 | const char *name; | |
4615 | struct disabled_builtin *next; | |
6dc50383 | 4616 | }; |
dd878098 | 4617 | static disabled_builtin *disabled_builtins = NULL; |
4618 | ||
1cae46be | 4619 | static bool builtin_function_disabled_p (const char *); |
dd878098 | 4620 | |
4621 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
4622 | begins with "__builtin_", give an error. */ | |
4623 | ||
4624 | void | |
1cae46be | 4625 | disable_builtin_function (const char *name) |
dd878098 | 4626 | { |
4627 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
b0b1af64 | 4628 | error ("cannot disable built-in function %qs", name); |
dd878098 | 4629 | else |
4630 | { | |
e85905e5 | 4631 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
4632 | new_disabled_builtin->name = name; | |
4633 | new_disabled_builtin->next = disabled_builtins; | |
4634 | disabled_builtins = new_disabled_builtin; | |
dd878098 | 4635 | } |
4636 | } | |
4637 | ||
4638 | ||
4639 | /* Return true if the built-in function NAME has been disabled, false | |
4640 | otherwise. */ | |
4641 | ||
4642 | static bool | |
1cae46be | 4643 | builtin_function_disabled_p (const char *name) |
dd878098 | 4644 | { |
4645 | disabled_builtin *p; | |
4646 | for (p = disabled_builtins; p != NULL; p = p->next) | |
4647 | { | |
4648 | if (strcmp (name, p->name) == 0) | |
4649 | return true; | |
4650 | } | |
4651 | return false; | |
4652 | } | |
4653 | ||
4654 | ||
3237155d | 4655 | /* Worker for DEF_BUILTIN. |
4656 | Possibly define a builtin function with one or two names. | |
4657 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
4658 | nonansi_p and flag_no_nonansi_builtin. */ | |
0d4238dc | 4659 | |
3237155d | 4660 | static void |
4661 | def_builtin_1 (enum built_in_function fncode, | |
4662 | const char *name, | |
4663 | enum built_in_class fnclass, | |
4664 | tree fntype, tree libtype, | |
4665 | bool both_p, bool fallback_p, bool nonansi_p, | |
4666 | tree fnattrs, bool implicit_p) | |
0d4238dc | 4667 | { |
3237155d | 4668 | tree decl; |
4669 | const char *libname; | |
4670 | ||
27213ba3 | 4671 | if (fntype == error_mark_node) |
4672 | return; | |
4673 | ||
3237155d | 4674 | gcc_assert ((!both_p && !fallback_p) |
4675 | || !strncmp (name, "__builtin_", | |
4676 | strlen ("__builtin_"))); | |
4677 | ||
4678 | libname = name + strlen ("__builtin_"); | |
54be5d7e | 4679 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
4680 | (fallback_p ? libname : NULL), | |
4681 | fnattrs); | |
b9a16870 | 4682 | |
4683 | set_builtin_decl (fncode, decl, implicit_p); | |
4684 | ||
3237155d | 4685 | if (both_p |
4686 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
dd878098 | 4687 | && !(nonansi_p && flag_no_nonansi_builtin)) |
54be5d7e | 4688 | add_builtin_function (libname, libtype, fncode, fnclass, |
4689 | NULL, fnattrs); | |
0d4238dc | 4690 | } |
e94026da | 4691 | \f |
d7aeef06 | 4692 | /* Nonzero if the type T promotes to int. This is (nearly) the |
4693 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
4694 | ||
4695 | bool | |
9f627b1a | 4696 | c_promoting_integer_type_p (const_tree t) |
d7aeef06 | 4697 | { |
4698 | switch (TREE_CODE (t)) | |
4699 | { | |
4700 | case INTEGER_TYPE: | |
4701 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
4702 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
4703 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
4704 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
7aa1e6eb | 4705 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
4706 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d7aeef06 | 4707 | |
4708 | case ENUMERAL_TYPE: | |
4709 | /* ??? Technically all enumerations not larger than an int | |
4710 | promote to an int. But this is used along code paths | |
4711 | that only want to notice a size change. */ | |
4712 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
4713 | ||
4714 | case BOOLEAN_TYPE: | |
78173203 | 4715 | return true; |
d7aeef06 | 4716 | |
4717 | default: | |
78173203 | 4718 | return false; |
d7aeef06 | 4719 | } |
4720 | } | |
4721 | ||
e94026da | 4722 | /* Return 1 if PARMS specifies a fixed number of parameters |
4723 | and none of their types is affected by default promotions. */ | |
4724 | ||
2823920b | 4725 | bool |
9f627b1a | 4726 | self_promoting_args_p (const_tree parms) |
e94026da | 4727 | { |
9f627b1a | 4728 | const_tree t; |
e94026da | 4729 | for (t = parms; t; t = TREE_CHAIN (t)) |
4730 | { | |
19cb6b50 | 4731 | tree type = TREE_VALUE (t); |
43f74bc4 | 4732 | |
e1d8e198 | 4733 | if (type == error_mark_node) |
4734 | continue; | |
4735 | ||
72749341 | 4736 | if (TREE_CHAIN (t) == NULL_TREE && type != void_type_node) |
2823920b | 4737 | return false; |
e94026da | 4738 | |
72749341 | 4739 | if (type == NULL_TREE) |
2823920b | 4740 | return false; |
e94026da | 4741 | |
4742 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
2823920b | 4743 | return false; |
e94026da | 4744 | |
d7aeef06 | 4745 | if (c_promoting_integer_type_p (type)) |
2823920b | 4746 | return false; |
e94026da | 4747 | } |
2823920b | 4748 | return true; |
e94026da | 4749 | } |
605fb01e | 4750 | |
c10de5e7 | 4751 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
4752 | tree | |
4753 | strip_pointer_operator (tree t) | |
4754 | { | |
4755 | while (POINTER_TYPE_P (t)) | |
4756 | t = TREE_TYPE (t); | |
4757 | return t; | |
4758 | } | |
4759 | ||
57a0ed23 | 4760 | /* Recursively remove pointer or array type from TYPE. */ |
4761 | tree | |
4762 | strip_pointer_or_array_types (tree t) | |
4763 | { | |
4764 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
4765 | t = TREE_TYPE (t); | |
4766 | return t; | |
4767 | } | |
4768 | ||
e41f0d80 | 4769 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
4770 | representing case labels, or NULL_TREE for a `default' label. | |
4771 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
4772 | K2, and 0 if K1 and K2 are equal. */ | |
4773 | ||
4774 | int | |
1cae46be | 4775 | case_compare (splay_tree_key k1, splay_tree_key k2) |
e41f0d80 | 4776 | { |
4777 | /* Consider a NULL key (such as arises with a `default' label) to be | |
4778 | smaller than anything else. */ | |
4779 | if (!k1) | |
4780 | return k2 ? -1 : 0; | |
4781 | else if (!k2) | |
4782 | return k1 ? 1 : 0; | |
4783 | ||
4784 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
4785 | } | |
4786 | ||
e60a6f7b | 4787 | /* Process a case label, located at LOC, for the range LOW_VALUE |
4788 | ... HIGH_VALUE. If LOW_VALUE and HIGH_VALUE are both NULL_TREE | |
4789 | then this case label is actually a `default' label. If only | |
4790 | HIGH_VALUE is NULL_TREE, then case label was declared using the | |
4791 | usual C/C++ syntax, rather than the GNU case range extension. | |
4792 | CASES is a tree containing all the case ranges processed so far; | |
be23b16f | 4793 | COND is the condition for the switch-statement itself. |
45cf699c | 4794 | Returns the CASE_LABEL_EXPR created, or ERROR_MARK_NODE if no |
4795 | CASE_LABEL_EXPR is created. */ | |
e41f0d80 | 4796 | |
4797 | tree | |
45cf699c | 4798 | c_add_case_label (location_t loc, splay_tree cases, tree cond, |
4799 | tree low_value, tree high_value) | |
e41f0d80 | 4800 | { |
4801 | tree type; | |
4802 | tree label; | |
4803 | tree case_label; | |
4804 | splay_tree_node node; | |
4805 | ||
4806 | /* Create the LABEL_DECL itself. */ | |
e60a6f7b | 4807 | label = create_artificial_label (loc); |
e41f0d80 | 4808 | |
4809 | /* If there was an error processing the switch condition, bail now | |
4810 | before we get more confused. */ | |
4811 | if (!cond || cond == error_mark_node) | |
4ee9c684 | 4812 | goto error_out; |
e41f0d80 | 4813 | |
1cae46be | 4814 | if ((low_value && TREE_TYPE (low_value) |
4815 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
e41f0d80 | 4816 | || (high_value && TREE_TYPE (high_value) |
4817 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
b96dc121 | 4818 | { |
e60a6f7b | 4819 | error_at (loc, "pointers are not permitted as case values"); |
b96dc121 | 4820 | goto error_out; |
4821 | } | |
e41f0d80 | 4822 | |
4823 | /* Case ranges are a GNU extension. */ | |
8864917d | 4824 | if (high_value) |
29438999 | 4825 | pedwarn (loc, OPT_Wpedantic, |
8864917d | 4826 | "range expressions in switch statements are non-standard"); |
e41f0d80 | 4827 | |
4828 | type = TREE_TYPE (cond); | |
4829 | if (low_value) | |
4830 | { | |
2d2f6a15 | 4831 | low_value = check_case_value (loc, low_value); |
22a75734 | 4832 | low_value = convert_and_check (loc, type, low_value); |
45cf699c | 4833 | low_value = fold (low_value); |
96722196 | 4834 | if (low_value == error_mark_node) |
4835 | goto error_out; | |
e41f0d80 | 4836 | } |
4837 | if (high_value) | |
4838 | { | |
2d2f6a15 | 4839 | high_value = check_case_value (loc, high_value); |
22a75734 | 4840 | high_value = convert_and_check (loc, type, high_value); |
45cf699c | 4841 | high_value = fold (high_value); |
96722196 | 4842 | if (high_value == error_mark_node) |
4843 | goto error_out; | |
e41f0d80 | 4844 | } |
4845 | ||
96722196 | 4846 | if (low_value && high_value) |
4847 | { | |
4848 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
a0c938f0 | 4849 | really a case range, even though it was written that way. |
4850 | Remove the HIGH_VALUE to simplify later processing. */ | |
96722196 | 4851 | if (tree_int_cst_equal (low_value, high_value)) |
4852 | high_value = NULL_TREE; | |
4853 | else if (!tree_int_cst_lt (low_value, high_value)) | |
e60a6f7b | 4854 | warning_at (loc, 0, "empty range specified"); |
96722196 | 4855 | } |
e41f0d80 | 4856 | |
4857 | /* Look up the LOW_VALUE in the table of case labels we already | |
4858 | have. */ | |
4859 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
4860 | /* If there was not an exact match, check for overlapping ranges. | |
4861 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
4862 | that's a `default' label and the only overlap is an exact match. */ | |
4863 | if (!node && (low_value || high_value)) | |
4864 | { | |
4865 | splay_tree_node low_bound; | |
4866 | splay_tree_node high_bound; | |
4867 | ||
4868 | /* Even though there wasn't an exact match, there might be an | |
4869 | overlap between this case range and another case range. | |
4870 | Since we've (inductively) not allowed any overlapping case | |
4871 | ranges, we simply need to find the greatest low case label | |
4872 | that is smaller that LOW_VALUE, and the smallest low case | |
4873 | label that is greater than LOW_VALUE. If there is an overlap | |
4874 | it will occur in one of these two ranges. */ | |
4875 | low_bound = splay_tree_predecessor (cases, | |
4876 | (splay_tree_key) low_value); | |
4877 | high_bound = splay_tree_successor (cases, | |
4878 | (splay_tree_key) low_value); | |
4879 | ||
4880 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
4881 | the LOW_VALUE, so there is no need to check unless the | |
4882 | LOW_BOUND is in fact itself a case range. */ | |
4883 | if (low_bound | |
4884 | && CASE_HIGH ((tree) low_bound->value) | |
4885 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
4886 | low_value) >= 0) | |
4887 | node = low_bound; | |
4888 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
4889 | range is bigger than the low end of the current range, so we | |
4890 | are only interested if the current range is a real range, and | |
4891 | not an ordinary case label. */ | |
1cae46be | 4892 | else if (high_bound |
e41f0d80 | 4893 | && high_value |
4894 | && (tree_int_cst_compare ((tree) high_bound->key, | |
4895 | high_value) | |
4896 | <= 0)) | |
4897 | node = high_bound; | |
4898 | } | |
4899 | /* If there was an overlap, issue an error. */ | |
4900 | if (node) | |
4901 | { | |
eaae3b75 | 4902 | tree duplicate = CASE_LABEL ((tree) node->value); |
e41f0d80 | 4903 | |
4904 | if (high_value) | |
4905 | { | |
e60a6f7b | 4906 | error_at (loc, "duplicate (or overlapping) case value"); |
6c1f90ee | 4907 | inform (DECL_SOURCE_LOCATION (duplicate), |
4908 | "this is the first entry overlapping that value"); | |
e41f0d80 | 4909 | } |
4910 | else if (low_value) | |
4911 | { | |
e60a6f7b | 4912 | error_at (loc, "duplicate case value") ; |
6c1f90ee | 4913 | inform (DECL_SOURCE_LOCATION (duplicate), "previously used here"); |
e41f0d80 | 4914 | } |
4915 | else | |
4916 | { | |
0f4cea33 | 4917 | error_at (loc, "multiple default labels in one switch"); |
6c1f90ee | 4918 | inform (DECL_SOURCE_LOCATION (duplicate), |
4919 | "this is the first default label"); | |
4ee9c684 | 4920 | } |
0f4cea33 | 4921 | goto error_out; |
4ee9c684 | 4922 | } |
359d87c6 | 4923 | |
0f4cea33 | 4924 | /* Add a CASE_LABEL to the statement-tree. */ |
4925 | case_label = add_stmt (build_case_label (low_value, high_value, label)); | |
4926 | /* Register this case label in the splay tree. */ | |
4927 | splay_tree_insert (cases, | |
4928 | (splay_tree_key) low_value, | |
4929 | (splay_tree_value) case_label); | |
359d87c6 | 4930 | |
0f4cea33 | 4931 | return case_label; |
6cbbbc89 | 4932 | |
0f4cea33 | 4933 | error_out: |
4934 | /* Add a label so that the back-end doesn't think that the beginning of | |
4935 | the switch is unreachable. Note that we do not add a case label, as | |
4936 | that just leads to duplicates and thence to failure later on. */ | |
4937 | if (!cases->root) | |
4938 | { | |
4939 | tree t = create_artificial_label (loc); | |
4940 | add_stmt (build_stmt (loc, LABEL_EXPR, t)); | |
4941 | } | |
4942 | return error_mark_node; | |
e41f0d80 | 4943 | } |
4944 | ||
dfa10f0d | 4945 | /* Subroutine of c_switch_covers_all_cases_p, called via |
4946 | splay_tree_foreach. Return 1 if it doesn't cover all the cases. | |
4947 | ARGS[0] is initially NULL and after the first iteration is the | |
4948 | so far highest case label. ARGS[1] is the minimum of SWITCH_COND's | |
4949 | type. */ | |
4950 | ||
4951 | static int | |
4952 | c_switch_covers_all_cases_p_1 (splay_tree_node node, void *data) | |
4953 | { | |
4954 | tree label = (tree) node->value; | |
4955 | tree *args = (tree *) data; | |
4956 | ||
4957 | /* If there is a default case, we shouldn't have called this. */ | |
4958 | gcc_assert (CASE_LOW (label)); | |
4959 | ||
4960 | if (args[0] == NULL_TREE) | |
4961 | { | |
4962 | if (wi::to_widest (args[1]) < wi::to_widest (CASE_LOW (label))) | |
4963 | return 1; | |
4964 | } | |
4965 | else if (wi::add (wi::to_widest (args[0]), 1) | |
4966 | != wi::to_widest (CASE_LOW (label))) | |
4967 | return 1; | |
4968 | if (CASE_HIGH (label)) | |
4969 | args[0] = CASE_HIGH (label); | |
4970 | else | |
4971 | args[0] = CASE_LOW (label); | |
4972 | return 0; | |
4973 | } | |
4974 | ||
4975 | /* Return true if switch with CASES and switch condition with type | |
4976 | covers all possible values in the case labels. */ | |
4977 | ||
4978 | bool | |
4979 | c_switch_covers_all_cases_p (splay_tree cases, tree type) | |
4980 | { | |
4981 | /* If there is default:, this is always the case. */ | |
4982 | splay_tree_node default_node | |
4983 | = splay_tree_lookup (cases, (splay_tree_key) NULL); | |
4984 | if (default_node) | |
4985 | return true; | |
4986 | ||
4987 | if (!INTEGRAL_TYPE_P (type)) | |
4988 | return false; | |
4989 | ||
4990 | tree args[2] = { NULL_TREE, TYPE_MIN_VALUE (type) }; | |
4991 | if (splay_tree_foreach (cases, c_switch_covers_all_cases_p_1, args)) | |
4992 | return false; | |
4993 | ||
4994 | /* If there are no cases at all, or if the highest case label | |
4995 | is smaller than TYPE_MAX_VALUE, return false. */ | |
4996 | if (args[0] == NULL_TREE | |
4997 | || wi::to_widest (args[0]) < wi::to_widest (TYPE_MAX_VALUE (type))) | |
4998 | return false; | |
4999 | ||
5000 | return true; | |
5001 | } | |
5002 | ||
9dd48740 | 5003 | /* Finish an expression taking the address of LABEL (an |
dda49785 | 5004 | IDENTIFIER_NODE). Returns an expression for the address. |
5005 | ||
5006 | LOC is the location for the expression returned. */ | |
d0a47c8d | 5007 | |
1cae46be | 5008 | tree |
dda49785 | 5009 | finish_label_address_expr (tree label, location_t loc) |
d0a47c8d | 5010 | { |
5011 | tree result; | |
5012 | ||
29438999 | 5013 | pedwarn (input_location, OPT_Wpedantic, "taking the address of a label is non-standard"); |
d0a47c8d | 5014 | |
9dd48740 | 5015 | if (label == error_mark_node) |
5016 | return error_mark_node; | |
5017 | ||
d0a47c8d | 5018 | label = lookup_label (label); |
5019 | if (label == NULL_TREE) | |
5020 | result = null_pointer_node; | |
5021 | else | |
5022 | { | |
5023 | TREE_USED (label) = 1; | |
5024 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
344cd9b2 | 5025 | /* The current function is not necessarily uninlinable. |
d0a47c8d | 5026 | Computed gotos are incompatible with inlining, but the value |
5027 | here could be used only in a diagnostic, for example. */ | |
dda49785 | 5028 | protected_set_expr_location (result, loc); |
d0a47c8d | 5029 | } |
5030 | ||
5031 | return result; | |
5032 | } | |
4f9a1c9b | 5033 | \f |
5034 | ||
5035 | /* Given a boolean expression ARG, return a tree representing an increment | |
5036 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
5037 | invalid cases (e.g., decrement in C++). */ | |
5038 | tree | |
1cae46be | 5039 | boolean_increment (enum tree_code code, tree arg) |
4f9a1c9b | 5040 | { |
5041 | tree val; | |
69db191c | 5042 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
c0f19401 | 5043 | |
4f9a1c9b | 5044 | arg = stabilize_reference (arg); |
5045 | switch (code) | |
5046 | { | |
5047 | case PREINCREMENT_EXPR: | |
14ae0310 | 5048 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 5049 | break; |
5050 | case POSTINCREMENT_EXPR: | |
14ae0310 | 5051 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
4f9a1c9b | 5052 | arg = save_expr (arg); |
14ae0310 | 5053 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5054 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 5055 | break; |
5056 | case PREDECREMENT_EXPR: | |
14ae0310 | 5057 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 5058 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 5059 | break; |
5060 | case POSTDECREMENT_EXPR: | |
14ae0310 | 5061 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
389dd41b | 5062 | invert_truthvalue_loc (input_location, arg)); |
4f9a1c9b | 5063 | arg = save_expr (arg); |
14ae0310 | 5064 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5065 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
4f9a1c9b | 5066 | break; |
5067 | default: | |
231bd014 | 5068 | gcc_unreachable (); |
4f9a1c9b | 5069 | } |
5070 | TREE_SIDE_EFFECTS (val) = 1; | |
5071 | return val; | |
5072 | } | |
76a6e674 | 5073 | \f |
f3449a3c | 5074 | /* Built-in macros for stddef.h and stdint.h, that require macros |
5075 | defined in this file. */ | |
79cf3ec1 | 5076 | void |
1cae46be | 5077 | c_stddef_cpp_builtins(void) |
1ed9d5f5 | 5078 | { |
63994318 | 5079 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
5080 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
5081 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
5082 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
36bccbfc | 5083 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
5084 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
82362779 | 5085 | if (flag_char8_t) |
5086 | builtin_define_with_value ("__CHAR8_TYPE__", CHAR8_TYPE, 0); | |
b0726616 | 5087 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
5088 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
f3449a3c | 5089 | if (SIG_ATOMIC_TYPE) |
5090 | builtin_define_with_value ("__SIG_ATOMIC_TYPE__", SIG_ATOMIC_TYPE, 0); | |
5091 | if (INT8_TYPE) | |
5092 | builtin_define_with_value ("__INT8_TYPE__", INT8_TYPE, 0); | |
5093 | if (INT16_TYPE) | |
5094 | builtin_define_with_value ("__INT16_TYPE__", INT16_TYPE, 0); | |
5095 | if (INT32_TYPE) | |
5096 | builtin_define_with_value ("__INT32_TYPE__", INT32_TYPE, 0); | |
5097 | if (INT64_TYPE) | |
5098 | builtin_define_with_value ("__INT64_TYPE__", INT64_TYPE, 0); | |
5099 | if (UINT8_TYPE) | |
5100 | builtin_define_with_value ("__UINT8_TYPE__", UINT8_TYPE, 0); | |
5101 | if (UINT16_TYPE) | |
5102 | builtin_define_with_value ("__UINT16_TYPE__", UINT16_TYPE, 0); | |
5103 | if (UINT32_TYPE) | |
5104 | builtin_define_with_value ("__UINT32_TYPE__", UINT32_TYPE, 0); | |
5105 | if (UINT64_TYPE) | |
5106 | builtin_define_with_value ("__UINT64_TYPE__", UINT64_TYPE, 0); | |
5107 | if (INT_LEAST8_TYPE) | |
5108 | builtin_define_with_value ("__INT_LEAST8_TYPE__", INT_LEAST8_TYPE, 0); | |
5109 | if (INT_LEAST16_TYPE) | |
5110 | builtin_define_with_value ("__INT_LEAST16_TYPE__", INT_LEAST16_TYPE, 0); | |
5111 | if (INT_LEAST32_TYPE) | |
5112 | builtin_define_with_value ("__INT_LEAST32_TYPE__", INT_LEAST32_TYPE, 0); | |
5113 | if (INT_LEAST64_TYPE) | |
5114 | builtin_define_with_value ("__INT_LEAST64_TYPE__", INT_LEAST64_TYPE, 0); | |
5115 | if (UINT_LEAST8_TYPE) | |
5116 | builtin_define_with_value ("__UINT_LEAST8_TYPE__", UINT_LEAST8_TYPE, 0); | |
5117 | if (UINT_LEAST16_TYPE) | |
5118 | builtin_define_with_value ("__UINT_LEAST16_TYPE__", UINT_LEAST16_TYPE, 0); | |
5119 | if (UINT_LEAST32_TYPE) | |
5120 | builtin_define_with_value ("__UINT_LEAST32_TYPE__", UINT_LEAST32_TYPE, 0); | |
5121 | if (UINT_LEAST64_TYPE) | |
5122 | builtin_define_with_value ("__UINT_LEAST64_TYPE__", UINT_LEAST64_TYPE, 0); | |
5123 | if (INT_FAST8_TYPE) | |
5124 | builtin_define_with_value ("__INT_FAST8_TYPE__", INT_FAST8_TYPE, 0); | |
5125 | if (INT_FAST16_TYPE) | |
5126 | builtin_define_with_value ("__INT_FAST16_TYPE__", INT_FAST16_TYPE, 0); | |
5127 | if (INT_FAST32_TYPE) | |
5128 | builtin_define_with_value ("__INT_FAST32_TYPE__", INT_FAST32_TYPE, 0); | |
5129 | if (INT_FAST64_TYPE) | |
5130 | builtin_define_with_value ("__INT_FAST64_TYPE__", INT_FAST64_TYPE, 0); | |
5131 | if (UINT_FAST8_TYPE) | |
5132 | builtin_define_with_value ("__UINT_FAST8_TYPE__", UINT_FAST8_TYPE, 0); | |
5133 | if (UINT_FAST16_TYPE) | |
5134 | builtin_define_with_value ("__UINT_FAST16_TYPE__", UINT_FAST16_TYPE, 0); | |
5135 | if (UINT_FAST32_TYPE) | |
5136 | builtin_define_with_value ("__UINT_FAST32_TYPE__", UINT_FAST32_TYPE, 0); | |
5137 | if (UINT_FAST64_TYPE) | |
5138 | builtin_define_with_value ("__UINT_FAST64_TYPE__", UINT_FAST64_TYPE, 0); | |
5139 | if (INTPTR_TYPE) | |
5140 | builtin_define_with_value ("__INTPTR_TYPE__", INTPTR_TYPE, 0); | |
5141 | if (UINTPTR_TYPE) | |
5142 | builtin_define_with_value ("__UINTPTR_TYPE__", UINTPTR_TYPE, 0); | |
574006c3 | 5143 | } |
5144 | ||
7d3b509a | 5145 | static void |
1cae46be | 5146 | c_init_attributes (void) |
7d3b509a | 5147 | { |
5148 | /* Fill in the built_in_attributes array. */ | |
7c446c95 | 5149 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
7d3b509a | 5150 | built_in_attributes[(int) ENUM] = NULL_TREE; |
7c446c95 | 5151 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
ceb7b692 | 5152 | built_in_attributes[(int) ENUM] = build_int_cst (integer_type_node, VALUE); |
c8010b80 | 5153 | #define DEF_ATTR_STRING(ENUM, VALUE) \ |
5154 | built_in_attributes[(int) ENUM] = build_string (strlen (VALUE), VALUE); | |
7d3b509a | 5155 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
5156 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
5157 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
5158 | built_in_attributes[(int) ENUM] \ | |
5159 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
5160 | built_in_attributes[(int) VALUE], \ | |
5161 | built_in_attributes[(int) CHAIN]); | |
7d3b509a | 5162 | #include "builtin-attrs.def" |
5163 | #undef DEF_ATTR_NULL_TREE | |
5164 | #undef DEF_ATTR_INT | |
5165 | #undef DEF_ATTR_IDENT | |
5166 | #undef DEF_ATTR_TREE_LIST | |
76a6e674 | 5167 | } |
5f3cead1 | 5168 | |
ff31e352 | 5169 | /* Check whether the byte alignment ALIGN is a valid user-specified |
5170 | alignment less than the supported maximum. If so, return ALIGN's | |
5171 | base-2 log; if not, output an error and return -1. If OBJFILE | |
5172 | then reject alignments greater than MAX_OFILE_ALIGNMENT when | |
5173 | converted to bits. Otherwise, consider valid only alignments | |
5174 | that are less than HOST_BITS_PER_INT - LOG2_BITS_PER_UNIT. | |
85e8db42 | 5175 | Zero is not considered a valid argument (and results in -1 on |
5176 | return) but it only triggers a warning when WARN_ZERO is set. */ | |
ff31e352 | 5177 | |
b0c98c23 | 5178 | int |
85e8db42 | 5179 | check_user_alignment (const_tree align, bool objfile, bool warn_zero) |
33199a81 | 5180 | { |
b0c98c23 | 5181 | if (error_operand_p (align)) |
5182 | return -1; | |
ff31e352 | 5183 | |
b0c98c23 | 5184 | if (TREE_CODE (align) != INTEGER_CST |
5185 | || !INTEGRAL_TYPE_P (TREE_TYPE (align))) | |
f8e93a2e | 5186 | { |
b0c98c23 | 5187 | error ("requested alignment is not an integer constant"); |
5188 | return -1; | |
f8e93a2e | 5189 | } |
ff31e352 | 5190 | |
85e8db42 | 5191 | if (integer_zerop (align)) |
5192 | { | |
5193 | if (warn_zero) | |
5194 | warning (OPT_Wattributes, | |
5195 | "requested alignment %qE is not a positive power of 2", | |
5196 | align); | |
5197 | return -1; | |
5198 | } | |
ff31e352 | 5199 | |
89793f1a | 5200 | /* Log2 of the byte alignment ALIGN. */ |
5201 | int log2align; | |
ff31e352 | 5202 | if (tree_int_cst_sgn (align) == -1 |
89793f1a | 5203 | || (log2align = tree_log2 (align)) == -1) |
c2ab04f9 | 5204 | { |
ff31e352 | 5205 | error ("requested alignment %qE is not a positive power of 2", |
5206 | align); | |
b0c98c23 | 5207 | return -1; |
c2ab04f9 | 5208 | } |
ff31e352 | 5209 | |
5210 | if (objfile) | |
f8e93a2e | 5211 | { |
ff31e352 | 5212 | unsigned maxalign = MAX_OFILE_ALIGNMENT / BITS_PER_UNIT; |
89793f1a | 5213 | if (!tree_fits_uhwi_p (align) || tree_to_uhwi (align) > maxalign) |
ff31e352 | 5214 | { |
5215 | error ("requested alignment %qE exceeds object file maximum %u", | |
5216 | align, maxalign); | |
5217 | return -1; | |
5218 | } | |
5219 | } | |
5220 | ||
89793f1a | 5221 | if (log2align >= HOST_BITS_PER_INT - LOG2_BITS_PER_UNIT) |
ff31e352 | 5222 | { |
5223 | error ("requested alignment %qE exceeds maximum %u", | |
89793f1a | 5224 | align, 1U << (HOST_BITS_PER_INT - LOG2_BITS_PER_UNIT - 1)); |
b0c98c23 | 5225 | return -1; |
f8e93a2e | 5226 | } |
ff31e352 | 5227 | |
89793f1a | 5228 | return log2align; |
f8e93a2e | 5229 | } |
5230 | ||
b0c98c23 | 5231 | /* Determine the ELF symbol visibility for DECL, which is either a |
5232 | variable or a function. It is an error to use this function if a | |
5233 | definition of DECL is not available in this translation unit. | |
5234 | Returns true if the final visibility has been determined by this | |
5235 | function; false if the caller is free to make additional | |
5236 | modifications. */ | |
f8e93a2e | 5237 | |
b0c98c23 | 5238 | bool |
5239 | c_determine_visibility (tree decl) | |
f8e93a2e | 5240 | { |
b0c98c23 | 5241 | gcc_assert (VAR_OR_FUNCTION_DECL_P (decl)); |
f8e93a2e | 5242 | |
b0c98c23 | 5243 | /* If the user explicitly specified the visibility with an |
5244 | attribute, honor that. DECL_VISIBILITY will have been set during | |
5245 | the processing of the attribute. We check for an explicit | |
5246 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
5247 | to distinguish the use of an attribute from the use of a "#pragma | |
5248 | GCC visibility push(...)"; in the latter case we still want other | |
5249 | considerations to be able to overrule the #pragma. */ | |
5250 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) | |
5251 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
5252 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
5253 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
5254 | return true; | |
f8e93a2e | 5255 | |
b0c98c23 | 5256 | /* Set default visibility to whatever the user supplied with |
5257 | visibility_specified depending on #pragma GCC visibility. */ | |
5258 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
f8e93a2e | 5259 | { |
b0c98c23 | 5260 | if (visibility_options.inpragma |
5261 | || DECL_VISIBILITY (decl) != default_visibility) | |
5262 | { | |
5263 | DECL_VISIBILITY (decl) = default_visibility; | |
5264 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
5265 | /* If visibility changed and DECL already has DECL_RTL, ensure | |
5266 | symbol flags are updated. */ | |
5267 | if (((VAR_P (decl) && TREE_STATIC (decl)) | |
5268 | || TREE_CODE (decl) == FUNCTION_DECL) | |
5269 | && DECL_RTL_SET_P (decl)) | |
5270 | make_decl_rtl (decl); | |
5271 | } | |
f8e93a2e | 5272 | } |
b0c98c23 | 5273 | return false; |
f8e93a2e | 5274 | } |
5275 | ||
184fac50 | 5276 | /* Data to communicate through check_function_arguments_recurse between |
5277 | check_function_nonnull and check_nonnull_arg. */ | |
5278 | ||
5279 | struct nonnull_arg_ctx | |
5280 | { | |
5281 | location_t loc; | |
5282 | bool warned_p; | |
5283 | }; | |
5284 | ||
b0c98c23 | 5285 | /* Check the argument list of a function call for null in argument slots |
5286 | that are marked as requiring a non-null pointer argument. The NARGS | |
184fac50 | 5287 | arguments are passed in the array ARGARRAY. Return true if we have |
5288 | warned. */ | |
f8e93a2e | 5289 | |
184fac50 | 5290 | static bool |
b0c98c23 | 5291 | check_function_nonnull (location_t loc, tree attrs, int nargs, tree *argarray) |
f8e93a2e | 5292 | { |
b0c98c23 | 5293 | tree a; |
5294 | int i; | |
f8e93a2e | 5295 | |
b0c98c23 | 5296 | attrs = lookup_attribute ("nonnull", attrs); |
5297 | if (attrs == NULL_TREE) | |
184fac50 | 5298 | return false; |
f8e93a2e | 5299 | |
b0c98c23 | 5300 | a = attrs; |
5301 | /* See if any of the nonnull attributes has no arguments. If so, | |
5302 | then every pointer argument is checked (in which case the check | |
5303 | for pointer type is done in check_nonnull_arg). */ | |
5304 | if (TREE_VALUE (a) != NULL_TREE) | |
5305 | do | |
5306 | a = lookup_attribute ("nonnull", TREE_CHAIN (a)); | |
5307 | while (a != NULL_TREE && TREE_VALUE (a) != NULL_TREE); | |
5de92639 | 5308 | |
184fac50 | 5309 | struct nonnull_arg_ctx ctx = { loc, false }; |
b0c98c23 | 5310 | if (a != NULL_TREE) |
5311 | for (i = 0; i < nargs; i++) | |
184fac50 | 5312 | check_function_arguments_recurse (check_nonnull_arg, &ctx, argarray[i], |
b0c98c23 | 5313 | i + 1); |
5314 | else | |
5de92639 | 5315 | { |
b0c98c23 | 5316 | /* Walk the argument list. If we encounter an argument number we |
5317 | should check for non-null, do it. */ | |
5318 | for (i = 0; i < nargs; i++) | |
5de92639 | 5319 | { |
b0c98c23 | 5320 | for (a = attrs; ; a = TREE_CHAIN (a)) |
5321 | { | |
5322 | a = lookup_attribute ("nonnull", a); | |
5323 | if (a == NULL_TREE || nonnull_check_p (TREE_VALUE (a), i + 1)) | |
5324 | break; | |
5325 | } | |
5326 | ||
5327 | if (a != NULL_TREE) | |
184fac50 | 5328 | check_function_arguments_recurse (check_nonnull_arg, &ctx, |
b0c98c23 | 5329 | argarray[i], i + 1); |
5de92639 | 5330 | } |
5de92639 | 5331 | } |
184fac50 | 5332 | return ctx.warned_p; |
5de92639 | 5333 | } |
758a38ab | 5334 | |
b0c98c23 | 5335 | /* Check that the Nth argument of a function call (counting backwards |
5336 | from the end) is a (pointer)0. The NARGS arguments are passed in the | |
5337 | array ARGARRAY. */ | |
5de92639 | 5338 | |
b0c98c23 | 5339 | static void |
5340 | check_function_sentinel (const_tree fntype, int nargs, tree *argarray) | |
5de92639 | 5341 | { |
b0c98c23 | 5342 | tree attr = lookup_attribute ("sentinel", TYPE_ATTRIBUTES (fntype)); |
5343 | ||
5344 | if (attr) | |
5de92639 | 5345 | { |
b0c98c23 | 5346 | int len = 0; |
5347 | int pos = 0; | |
5348 | tree sentinel; | |
5349 | function_args_iterator iter; | |
5350 | tree t; | |
5351 | ||
5352 | /* Skip over the named arguments. */ | |
5353 | FOREACH_FUNCTION_ARGS (fntype, t, iter) | |
5de92639 | 5354 | { |
b0c98c23 | 5355 | if (len == nargs) |
5356 | break; | |
5357 | len++; | |
5de92639 | 5358 | } |
5de92639 | 5359 | |
b0c98c23 | 5360 | if (TREE_VALUE (attr)) |
5361 | { | |
5362 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
5363 | pos = TREE_INT_CST_LOW (p); | |
5364 | } | |
5de92639 | 5365 | |
b0c98c23 | 5366 | /* The sentinel must be one of the varargs, i.e. |
5367 | in position >= the number of fixed arguments. */ | |
5368 | if ((nargs - 1 - pos) < len) | |
5369 | { | |
5370 | warning (OPT_Wformat_, | |
5371 | "not enough variable arguments to fit a sentinel"); | |
5372 | return; | |
5373 | } | |
d413ffdd | 5374 | |
b0c98c23 | 5375 | /* Validate the sentinel. */ |
8e415b30 | 5376 | sentinel = fold_for_warn (argarray[nargs - 1 - pos]); |
b0c98c23 | 5377 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) |
5378 | || !integer_zerop (sentinel)) | |
5379 | /* Although __null (in C++) is only an integer we allow it | |
5380 | nevertheless, as we are guaranteed that it's exactly | |
5381 | as wide as a pointer, and we don't want to force | |
5382 | users to cast the NULL they have written there. | |
5383 | We warn with -Wstrict-null-sentinel, though. */ | |
5384 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
5385 | warning (OPT_Wformat_, "missing sentinel in function call"); | |
d413ffdd | 5386 | } |
d413ffdd | 5387 | } |
5388 | ||
75e9093e | 5389 | /* Check that the same argument isn't passed to two or more |
5390 | restrict-qualified formal and issue a -Wrestrict warning | |
5391 | if it is. Return true if a warning has been issued. */ | |
bbd5521e | 5392 | |
75e9093e | 5393 | static bool |
bbd5521e | 5394 | check_function_restrict (const_tree fndecl, const_tree fntype, |
8e415b30 | 5395 | int nargs, tree *unfolded_argarray) |
bbd5521e | 5396 | { |
5397 | int i; | |
e6a18b5a | 5398 | tree parms = TYPE_ARG_TYPES (fntype); |
bbd5521e | 5399 | |
8e415b30 | 5400 | /* Call fold_for_warn on all of the arguments. */ |
5401 | auto_vec<tree> argarray (nargs); | |
5402 | for (i = 0; i < nargs; i++) | |
5403 | argarray.quick_push (fold_for_warn (unfolded_argarray[i])); | |
5404 | ||
bbd5521e | 5405 | if (fndecl |
e6a18b5a | 5406 | && TREE_CODE (fndecl) == FUNCTION_DECL) |
5407 | { | |
75e9093e | 5408 | /* Avoid diagnosing calls built-ins with a zero size/bound |
5409 | here. They are checked in more detail elsewhere. */ | |
a0e9bfbb | 5410 | if (fndecl_built_in_p (fndecl, BUILT_IN_NORMAL) |
75e9093e | 5411 | && nargs == 3 |
5412 | && TREE_CODE (argarray[2]) == INTEGER_CST | |
5413 | && integer_zerop (argarray[2])) | |
5414 | return false; | |
e6a18b5a | 5415 | |
5416 | if (DECL_ARGUMENTS (fndecl)) | |
5417 | parms = DECL_ARGUMENTS (fndecl); | |
5418 | } | |
bbd5521e | 5419 | |
5420 | for (i = 0; i < nargs; i++) | |
5421 | TREE_VISITED (argarray[i]) = 0; | |
5422 | ||
75e9093e | 5423 | bool warned = false; |
5424 | ||
bbd5521e | 5425 | for (i = 0; i < nargs && parms && parms != void_list_node; i++) |
5426 | { | |
5427 | tree type; | |
5428 | if (TREE_CODE (parms) == PARM_DECL) | |
5429 | { | |
5430 | type = TREE_TYPE (parms); | |
5431 | parms = DECL_CHAIN (parms); | |
5432 | } | |
5433 | else | |
5434 | { | |
5435 | type = TREE_VALUE (parms); | |
5436 | parms = TREE_CHAIN (parms); | |
5437 | } | |
5438 | if (POINTER_TYPE_P (type) | |
5439 | && TYPE_RESTRICT (type) | |
5440 | && !TYPE_READONLY (TREE_TYPE (type))) | |
8e415b30 | 5441 | warned |= warn_for_restrict (i, argarray.address (), nargs); |
bbd5521e | 5442 | } |
5443 | ||
5444 | for (i = 0; i < nargs; i++) | |
5445 | TREE_VISITED (argarray[i]) = 0; | |
75e9093e | 5446 | |
5447 | return warned; | |
bbd5521e | 5448 | } |
5449 | ||
b0c98c23 | 5450 | /* Helper for check_function_nonnull; given a list of operands which |
5451 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
5452 | checked. */ | |
a9196da9 | 5453 | |
b0c98c23 | 5454 | static bool |
5455 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) | |
a9196da9 | 5456 | { |
b0c98c23 | 5457 | unsigned HOST_WIDE_INT arg_num = 0; |
05f893e1 | 5458 | |
b0c98c23 | 5459 | for (; args; args = TREE_CHAIN (args)) |
05f893e1 | 5460 | { |
b0c98c23 | 5461 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
05f893e1 | 5462 | |
b0c98c23 | 5463 | gcc_assert (found); |
05f893e1 | 5464 | |
b0c98c23 | 5465 | if (arg_num == param_num) |
5466 | return true; | |
947aa916 | 5467 | } |
b0c98c23 | 5468 | return false; |
947aa916 | 5469 | } |
5470 | ||
b0c98c23 | 5471 | /* Check that the function argument PARAM (which is operand number |
5472 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
5473 | via check_function_arguments_recurse. */ | |
f8e93a2e | 5474 | |
b0c98c23 | 5475 | static void |
5476 | check_nonnull_arg (void *ctx, tree param, unsigned HOST_WIDE_INT param_num) | |
f8e93a2e | 5477 | { |
184fac50 | 5478 | struct nonnull_arg_ctx *pctx = (struct nonnull_arg_ctx *) ctx; |
f8e93a2e | 5479 | |
b0c98c23 | 5480 | /* Just skip checking the argument if it's not a pointer. This can |
5481 | happen if the "nonnull" attribute was given without an operand | |
5482 | list (which means to check every pointer argument). */ | |
bdb1f0d1 | 5483 | |
b0c98c23 | 5484 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) |
5485 | return; | |
bdb1f0d1 | 5486 | |
4210c535 | 5487 | /* Diagnose the simple cases of null arguments. */ |
5488 | if (integer_zerop (fold_for_warn (param))) | |
184fac50 | 5489 | { |
5490 | warning_at (pctx->loc, OPT_Wnonnull, "null argument where non-null " | |
5491 | "required (argument %lu)", (unsigned long) param_num); | |
5492 | pctx->warned_p = true; | |
5493 | } | |
bdb1f0d1 | 5494 | } |
5495 | ||
b0c98c23 | 5496 | /* Helper for nonnull attribute handling; fetch the operand number |
5497 | from the attribute argument list. */ | |
85fbea97 | 5498 | |
b0c98c23 | 5499 | bool |
5500 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) | |
85fbea97 | 5501 | { |
b0c98c23 | 5502 | /* Verify the arg number is a small constant. */ |
5503 | if (tree_fits_uhwi_p (arg_num_expr)) | |
85fbea97 | 5504 | { |
ab2a527a | 5505 | *valp = tree_to_uhwi (arg_num_expr); |
b0c98c23 | 5506 | return true; |
85fbea97 | 5507 | } |
b0c98c23 | 5508 | else |
5509 | return false; | |
ab50af2a | 5510 | } |
5511 | ||
46f8e3b0 | 5512 | /* Arguments being collected for optimization. */ |
5513 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
f1f41a6c | 5514 | static GTY(()) vec<const_char_p, va_gc> *optimize_args; |
46f8e3b0 | 5515 | |
5516 | ||
5517 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
5518 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
5519 | false for #pragma GCC optimize. */ | |
5520 | ||
5521 | bool | |
5522 | parse_optimize_options (tree args, bool attr_p) | |
5523 | { | |
5524 | bool ret = true; | |
5525 | unsigned opt_argc; | |
5526 | unsigned i; | |
5527 | const char **opt_argv; | |
615ef0bb | 5528 | struct cl_decoded_option *decoded_options; |
5529 | unsigned int decoded_options_count; | |
46f8e3b0 | 5530 | tree ap; |
5531 | ||
5532 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
5533 | collected strings. */ | |
f1f41a6c | 5534 | vec_safe_truncate (optimize_args, 0); |
5535 | vec_safe_push (optimize_args, (const char *) NULL); | |
46f8e3b0 | 5536 | |
5537 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
5538 | { | |
5539 | tree value = TREE_VALUE (ap); | |
5540 | ||
5541 | if (TREE_CODE (value) == INTEGER_CST) | |
5542 | { | |
5543 | char buffer[20]; | |
f9ae6f95 | 5544 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); |
f1f41a6c | 5545 | vec_safe_push (optimize_args, ggc_strdup (buffer)); |
46f8e3b0 | 5546 | } |
5547 | ||
5548 | else if (TREE_CODE (value) == STRING_CST) | |
5549 | { | |
5550 | /* Split string into multiple substrings. */ | |
5551 | size_t len = TREE_STRING_LENGTH (value); | |
5552 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
5553 | char *end = p + len; | |
5554 | char *comma; | |
5555 | char *next_p = p; | |
5556 | ||
5557 | while (next_p != NULL) | |
5558 | { | |
5559 | size_t len2; | |
5560 | char *q, *r; | |
5561 | ||
5562 | p = next_p; | |
5563 | comma = strchr (p, ','); | |
5564 | if (comma) | |
5565 | { | |
5566 | len2 = comma - p; | |
5567 | *comma = '\0'; | |
5568 | next_p = comma+1; | |
5569 | } | |
5570 | else | |
5571 | { | |
5572 | len2 = end - p; | |
5573 | next_p = NULL; | |
5574 | } | |
5575 | ||
46f8e3b0 | 5576 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx |
5577 | options. */ | |
5578 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
5579 | { | |
5580 | ret = false; | |
5581 | if (attr_p) | |
5582 | warning (OPT_Wattributes, | |
86a5f91c | 5583 | "bad option %qs to attribute %<optimize%>", p); |
46f8e3b0 | 5584 | else |
5585 | warning (OPT_Wpragmas, | |
86a5f91c | 5586 | "bad option %qs to pragma %<optimize%>", p); |
46f8e3b0 | 5587 | continue; |
5588 | } | |
5589 | ||
f6742350 | 5590 | /* Can't use GC memory here, see PR88007. */ |
5591 | r = q = XOBNEWVEC (&opts_obstack, char, len2 + 3); | |
5592 | ||
46f8e3b0 | 5593 | if (*p != '-') |
5594 | { | |
5595 | *r++ = '-'; | |
5596 | ||
5597 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
5598 | itself is -Os, and any other switch begins with a -f. */ | |
5599 | if ((*p >= '0' && *p <= '9') | |
5600 | || (p[0] == 's' && p[1] == '\0')) | |
5601 | *r++ = 'O'; | |
5602 | else if (*p != 'O') | |
5603 | *r++ = 'f'; | |
5604 | } | |
5605 | ||
5606 | memcpy (r, p, len2); | |
5607 | r[len2] = '\0'; | |
f1f41a6c | 5608 | vec_safe_push (optimize_args, (const char *) q); |
46f8e3b0 | 5609 | } |
5610 | ||
5611 | } | |
5612 | } | |
5613 | ||
f1f41a6c | 5614 | opt_argc = optimize_args->length (); |
46f8e3b0 | 5615 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); |
5616 | ||
5617 | for (i = 1; i < opt_argc; i++) | |
f1f41a6c | 5618 | opt_argv[i] = (*optimize_args)[i]; |
46f8e3b0 | 5619 | |
5620 | /* Now parse the options. */ | |
f3f006ad | 5621 | decode_cmdline_options_to_array_default_mask (opt_argc, opt_argv, |
5622 | &decoded_options, | |
5623 | &decoded_options_count); | |
b032c4dd | 5624 | /* Drop non-Optimization options. */ |
5625 | unsigned j = 1; | |
5626 | for (i = 1; i < decoded_options_count; ++i) | |
5627 | { | |
5628 | if (! (cl_options[decoded_options[i].opt_index].flags & CL_OPTIMIZATION)) | |
5629 | { | |
5630 | ret = false; | |
5631 | if (attr_p) | |
5632 | warning (OPT_Wattributes, | |
86a5f91c | 5633 | "bad option %qs to attribute %<optimize%>", |
b032c4dd | 5634 | decoded_options[i].orig_option_with_args_text); |
5635 | else | |
5636 | warning (OPT_Wpragmas, | |
86a5f91c | 5637 | "bad option %qs to pragma %<optimize%>", |
b032c4dd | 5638 | decoded_options[i].orig_option_with_args_text); |
5639 | continue; | |
5640 | } | |
5641 | if (i != j) | |
5642 | decoded_options[j] = decoded_options[i]; | |
5643 | j++; | |
5644 | } | |
5645 | decoded_options_count = j; | |
5646 | /* And apply them. */ | |
f3f006ad | 5647 | decode_options (&global_options, &global_options_set, |
3c6c0e40 | 5648 | decoded_options, decoded_options_count, |
98102386 | 5649 | input_location, global_dc, NULL); |
46f8e3b0 | 5650 | |
4bec06b3 | 5651 | targetm.override_options_after_change(); |
5652 | ||
f1f41a6c | 5653 | optimize_args->truncate (0); |
46f8e3b0 | 5654 | return ret; |
5655 | } | |
5656 | ||
3c77f69c | 5657 | /* Check whether ATTR is a valid attribute fallthrough. */ |
5658 | ||
5659 | bool | |
5660 | attribute_fallthrough_p (tree attr) | |
5661 | { | |
bbdce47f | 5662 | if (attr == error_mark_node) |
5663 | return false; | |
3c77f69c | 5664 | tree t = lookup_attribute ("fallthrough", attr); |
5665 | if (t == NULL_TREE) | |
5666 | return false; | |
5667 | /* This attribute shall appear at most once in each attribute-list. */ | |
5668 | if (lookup_attribute ("fallthrough", TREE_CHAIN (t))) | |
5669 | warning (OPT_Wattributes, "%<fallthrough%> attribute specified multiple " | |
5670 | "times"); | |
5671 | /* No attribute-argument-clause shall be present. */ | |
5672 | else if (TREE_VALUE (t) != NULL_TREE) | |
5673 | warning (OPT_Wattributes, "%<fallthrough%> attribute specified with " | |
5674 | "a parameter"); | |
5675 | /* Warn if other attributes are found. */ | |
5676 | for (t = attr; t != NULL_TREE; t = TREE_CHAIN (t)) | |
5677 | { | |
5678 | tree name = get_attribute_name (t); | |
5679 | if (!is_attribute_p ("fallthrough", name)) | |
5680 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5681 | } | |
5682 | return true; | |
5683 | } | |
5684 | ||
dbf6c367 | 5685 | \f |
774e9d58 | 5686 | /* Check for valid arguments being passed to a function with FNTYPE. |
75e9093e | 5687 | There are NARGS arguments in the array ARGARRAY. LOC should be used |
5688 | for diagnostics. Return true if either -Wnonnull or -Wrestrict has | |
8e415b30 | 5689 | been issued. |
5690 | ||
5691 | The arguments in ARGARRAY may not have been folded yet (e.g. for C++, | |
5692 | to preserve location wrappers); checks that require folded arguments | |
5693 | should call fold_for_warn on them. */ | |
75e9093e | 5694 | |
184fac50 | 5695 | bool |
bbd5521e | 5696 | check_function_arguments (location_t loc, const_tree fndecl, const_tree fntype, |
a115c319 | 5697 | int nargs, tree *argarray, vec<location_t> *arglocs) |
dbf6c367 | 5698 | { |
184fac50 | 5699 | bool warned_p = false; |
5700 | ||
dbf6c367 | 5701 | /* Check for null being passed in a pointer argument that must be |
5702 | non-null. We also need to do this if format checking is enabled. */ | |
5703 | ||
5704 | if (warn_nonnull) | |
184fac50 | 5705 | warned_p = check_function_nonnull (loc, TYPE_ATTRIBUTES (fntype), |
5706 | nargs, argarray); | |
dbf6c367 | 5707 | |
5708 | /* Check for errors in format strings. */ | |
5709 | ||
068bea1e | 5710 | if (warn_format || warn_suggest_attribute_format) |
249e7a17 | 5711 | check_function_format (fntype, TYPE_ATTRIBUTES (fntype), nargs, argarray, |
5712 | arglocs); | |
95c90e04 | 5713 | |
5714 | if (warn_format) | |
774e9d58 | 5715 | check_function_sentinel (fntype, nargs, argarray); |
bbd5521e | 5716 | |
5717 | if (warn_restrict) | |
75e9093e | 5718 | warned_p |= check_function_restrict (fndecl, fntype, nargs, argarray); |
184fac50 | 5719 | return warned_p; |
dbf6c367 | 5720 | } |
5721 | ||
5722 | /* Generic argument checking recursion routine. PARAM is the argument to | |
5723 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
5724 | once the argument is resolved. CTX is context for the callback. */ | |
5725 | void | |
1cae46be | 5726 | check_function_arguments_recurse (void (*callback) |
5727 | (void *, tree, unsigned HOST_WIDE_INT), | |
5728 | void *ctx, tree param, | |
5729 | unsigned HOST_WIDE_INT param_num) | |
dbf6c367 | 5730 | { |
72dd6141 | 5731 | if (CONVERT_EXPR_P (param) |
c44afe23 | 5732 | && (TYPE_PRECISION (TREE_TYPE (param)) |
5733 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
dbf6c367 | 5734 | { |
5735 | /* Strip coercion. */ | |
5736 | check_function_arguments_recurse (callback, ctx, | |
4ee9c684 | 5737 | TREE_OPERAND (param, 0), param_num); |
dbf6c367 | 5738 | return; |
5739 | } | |
5740 | ||
5741 | if (TREE_CODE (param) == CALL_EXPR) | |
5742 | { | |
c2f47e15 | 5743 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
dbf6c367 | 5744 | tree attrs; |
5745 | bool found_format_arg = false; | |
5746 | ||
5747 | /* See if this is a call to a known internationalization function | |
5748 | that modifies a format arg. Such a function may have multiple | |
5749 | format_arg attributes (for example, ngettext). */ | |
5750 | ||
5751 | for (attrs = TYPE_ATTRIBUTES (type); | |
5752 | attrs; | |
5753 | attrs = TREE_CHAIN (attrs)) | |
5754 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
5755 | { | |
c2f47e15 | 5756 | tree inner_arg; |
dbf6c367 | 5757 | tree format_num_expr; |
5758 | int format_num; | |
5759 | int i; | |
c2f47e15 | 5760 | call_expr_arg_iterator iter; |
dbf6c367 | 5761 | |
5762 | /* Extract the argument number, which was previously checked | |
5763 | to be valid. */ | |
5764 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
ddb1be65 | 5765 | |
e913b5cd | 5766 | format_num = tree_to_uhwi (format_num_expr); |
dbf6c367 | 5767 | |
c2f47e15 | 5768 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
72749341 | 5769 | inner_arg != NULL_TREE; |
c2f47e15 | 5770 | inner_arg = next_call_expr_arg (&iter), i++) |
dbf6c367 | 5771 | if (i == format_num) |
5772 | { | |
5773 | check_function_arguments_recurse (callback, ctx, | |
c2f47e15 | 5774 | inner_arg, param_num); |
dbf6c367 | 5775 | found_format_arg = true; |
5776 | break; | |
5777 | } | |
5778 | } | |
5779 | ||
5780 | /* If we found a format_arg attribute and did a recursive check, | |
5781 | we are done with checking this argument. Otherwise, we continue | |
5782 | and this will be considered a non-literal. */ | |
5783 | if (found_format_arg) | |
5784 | return; | |
5785 | } | |
5786 | ||
5787 | if (TREE_CODE (param) == COND_EXPR) | |
5788 | { | |
f6dfb86a | 5789 | /* Simplify to avoid warning for an impossible case. */ |
5790 | param = fold_for_warn (param); | |
5791 | if (TREE_CODE (param) == COND_EXPR) | |
5792 | { | |
5793 | /* Check both halves of the conditional expression. */ | |
5794 | check_function_arguments_recurse (callback, ctx, | |
5795 | TREE_OPERAND (param, 1), | |
5796 | param_num); | |
5797 | check_function_arguments_recurse (callback, ctx, | |
5798 | TREE_OPERAND (param, 2), | |
5799 | param_num); | |
5800 | return; | |
5801 | } | |
dbf6c367 | 5802 | } |
5803 | ||
5804 | (*callback) (ctx, param, param_num); | |
5805 | } | |
1f3233d1 | 5806 | |
60cce472 | 5807 | /* Checks for a builtin function FNDECL that the number of arguments |
5808 | NARGS against the required number REQUIRED and issues an error if | |
5809 | there is a mismatch. Returns true if the number of arguments is | |
5d4db8ef | 5810 | correct, otherwise false. LOC is the location of FNDECL. */ |
d43cee80 | 5811 | |
5812 | static bool | |
5d4db8ef | 5813 | builtin_function_validate_nargs (location_t loc, tree fndecl, int nargs, |
5814 | int required) | |
d43cee80 | 5815 | { |
5816 | if (nargs < required) | |
5817 | { | |
23b101c5 | 5818 | error_at (loc, "too few arguments to function %qE", fndecl); |
d43cee80 | 5819 | return false; |
5820 | } | |
5821 | else if (nargs > required) | |
5822 | { | |
5d4db8ef | 5823 | error_at (loc, "too many arguments to function %qE", fndecl); |
d43cee80 | 5824 | return false; |
5825 | } | |
5826 | return true; | |
5827 | } | |
5828 | ||
5d4db8ef | 5829 | /* Helper macro for check_builtin_function_arguments. */ |
5830 | #define ARG_LOCATION(N) \ | |
5831 | (arg_loc.is_empty () \ | |
5832 | ? EXPR_LOC_OR_LOC (args[(N)], input_location) \ | |
5833 | : expansion_point_location (arg_loc[(N)])) | |
5834 | ||
d43cee80 | 5835 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. |
5d4db8ef | 5836 | Returns false if there was an error, otherwise true. LOC is the |
5837 | location of the function; ARG_LOC is a vector of locations of the | |
5838 | arguments. */ | |
d43cee80 | 5839 | |
5840 | bool | |
5d4db8ef | 5841 | check_builtin_function_arguments (location_t loc, vec<location_t> arg_loc, |
5842 | tree fndecl, int nargs, tree *args) | |
d43cee80 | 5843 | { |
a0e9bfbb | 5844 | if (!fndecl_built_in_p (fndecl, BUILT_IN_NORMAL)) |
d43cee80 | 5845 | return true; |
5846 | ||
5847 | switch (DECL_FUNCTION_CODE (fndecl)) | |
5848 | { | |
2b34677f | 5849 | case BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX: |
5850 | if (!tree_fits_uhwi_p (args[2])) | |
5851 | { | |
5852 | error_at (ARG_LOCATION (2), | |
5853 | "third argument to function %qE must be a constant integer", | |
5854 | fndecl); | |
5855 | return false; | |
5856 | } | |
5857 | /* fall through */ | |
5858 | ||
8c38d887 | 5859 | case BUILT_IN_ALLOCA_WITH_ALIGN: |
5860 | { | |
5861 | /* Get the requested alignment (in bits) if it's a constant | |
5862 | integer expression. */ | |
5863 | unsigned HOST_WIDE_INT align | |
5864 | = tree_fits_uhwi_p (args[1]) ? tree_to_uhwi (args[1]) : 0; | |
5865 | ||
5866 | /* Determine if the requested alignment is a power of 2. */ | |
5867 | if ((align & (align - 1))) | |
5868 | align = 0; | |
5869 | ||
5870 | /* The maximum alignment in bits corresponding to the same | |
5871 | maximum in bytes enforced in check_user_alignment(). */ | |
5872 | unsigned maxalign = (UINT_MAX >> 1) + 1; | |
5d4db8ef | 5873 | |
8c38d887 | 5874 | /* Reject invalid alignments. */ |
5875 | if (align < BITS_PER_UNIT || maxalign < align) | |
5876 | { | |
5d4db8ef | 5877 | error_at (ARG_LOCATION (1), |
8c38d887 | 5878 | "second argument to function %qE must be a constant " |
5879 | "integer power of 2 between %qi and %qu bits", | |
5880 | fndecl, BITS_PER_UNIT, maxalign); | |
5881 | return false; | |
5882 | } | |
5d4db8ef | 5883 | return true; |
8c38d887 | 5884 | } |
5885 | ||
d43cee80 | 5886 | case BUILT_IN_CONSTANT_P: |
5d4db8ef | 5887 | return builtin_function_validate_nargs (loc, fndecl, nargs, 1); |
d43cee80 | 5888 | |
5889 | case BUILT_IN_ISFINITE: | |
5890 | case BUILT_IN_ISINF: | |
c319d56a | 5891 | case BUILT_IN_ISINF_SIGN: |
d43cee80 | 5892 | case BUILT_IN_ISNAN: |
5893 | case BUILT_IN_ISNORMAL: | |
10902624 | 5894 | case BUILT_IN_SIGNBIT: |
5d4db8ef | 5895 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 1)) |
d43cee80 | 5896 | { |
5897 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
5898 | { | |
5d4db8ef | 5899 | error_at (ARG_LOCATION (0), "non-floating-point argument in " |
5900 | "call to function %qE", fndecl); | |
d43cee80 | 5901 | return false; |
5902 | } | |
5903 | return true; | |
5904 | } | |
5905 | return false; | |
5906 | ||
5907 | case BUILT_IN_ISGREATER: | |
5908 | case BUILT_IN_ISGREATEREQUAL: | |
5909 | case BUILT_IN_ISLESS: | |
5910 | case BUILT_IN_ISLESSEQUAL: | |
5911 | case BUILT_IN_ISLESSGREATER: | |
5912 | case BUILT_IN_ISUNORDERED: | |
5d4db8ef | 5913 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 2)) |
d43cee80 | 5914 | { |
5915 | enum tree_code code0, code1; | |
5916 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
5917 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
5918 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
5919 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
5920 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
5921 | { | |
5d4db8ef | 5922 | error_at (loc, "non-floating-point arguments in call to " |
5923 | "function %qE", fndecl); | |
d43cee80 | 5924 | return false; |
5925 | } | |
5926 | return true; | |
5927 | } | |
5928 | return false; | |
5929 | ||
19fbe3a4 | 5930 | case BUILT_IN_FPCLASSIFY: |
5d4db8ef | 5931 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 6)) |
19fbe3a4 | 5932 | { |
5d4db8ef | 5933 | for (unsigned int i = 0; i < 5; i++) |
19fbe3a4 | 5934 | if (TREE_CODE (args[i]) != INTEGER_CST) |
5935 | { | |
5d4db8ef | 5936 | error_at (ARG_LOCATION (i), "non-const integer argument %u in " |
5937 | "call to function %qE", i + 1, fndecl); | |
19fbe3a4 | 5938 | return false; |
5939 | } | |
5940 | ||
5941 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
5942 | { | |
5d4db8ef | 5943 | error_at (ARG_LOCATION (5), "non-floating-point argument in " |
5944 | "call to function %qE", fndecl); | |
19fbe3a4 | 5945 | return false; |
5946 | } | |
5947 | return true; | |
5948 | } | |
5949 | return false; | |
5950 | ||
fca0886c | 5951 | case BUILT_IN_ASSUME_ALIGNED: |
5d4db8ef | 5952 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 2 + (nargs > 2))) |
fca0886c | 5953 | { |
5954 | if (nargs >= 3 && TREE_CODE (TREE_TYPE (args[2])) != INTEGER_TYPE) | |
5955 | { | |
5d4db8ef | 5956 | error_at (ARG_LOCATION (2), "non-integer argument 3 in call to " |
5957 | "function %qE", fndecl); | |
fca0886c | 5958 | return false; |
5959 | } | |
5960 | return true; | |
5961 | } | |
5962 | return false; | |
5963 | ||
0c93c8a9 | 5964 | case BUILT_IN_ADD_OVERFLOW: |
5965 | case BUILT_IN_SUB_OVERFLOW: | |
5966 | case BUILT_IN_MUL_OVERFLOW: | |
5d4db8ef | 5967 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 3)) |
0c93c8a9 | 5968 | { |
5969 | unsigned i; | |
5970 | for (i = 0; i < 2; i++) | |
5971 | if (!INTEGRAL_TYPE_P (TREE_TYPE (args[i]))) | |
5972 | { | |
5d4db8ef | 5973 | error_at (ARG_LOCATION (i), "argument %u in call to function " |
5974 | "%qE does not have integral type", i + 1, fndecl); | |
0c93c8a9 | 5975 | return false; |
5976 | } | |
5977 | if (TREE_CODE (TREE_TYPE (args[2])) != POINTER_TYPE | |
77104764 | 5978 | || !INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE (args[2])))) |
0c93c8a9 | 5979 | { |
5d4db8ef | 5980 | error_at (ARG_LOCATION (2), "argument 3 in call to function %qE " |
77104764 | 5981 | "does not have pointer to integral type", fndecl); |
5982 | return false; | |
5983 | } | |
5984 | else if (TREE_CODE (TREE_TYPE (TREE_TYPE (args[2]))) == ENUMERAL_TYPE) | |
5985 | { | |
5986 | error_at (ARG_LOCATION (2), "argument 3 in call to function %qE " | |
5987 | "has pointer to enumerated type", fndecl); | |
5988 | return false; | |
5989 | } | |
5990 | else if (TREE_CODE (TREE_TYPE (TREE_TYPE (args[2]))) == BOOLEAN_TYPE) | |
5991 | { | |
5992 | error_at (ARG_LOCATION (2), "argument 3 in call to function %qE " | |
5993 | "has pointer to boolean type", fndecl); | |
0c93c8a9 | 5994 | return false; |
5995 | } | |
5996 | return true; | |
5997 | } | |
5998 | return false; | |
5999 | ||
732905bb | 6000 | case BUILT_IN_ADD_OVERFLOW_P: |
6001 | case BUILT_IN_SUB_OVERFLOW_P: | |
6002 | case BUILT_IN_MUL_OVERFLOW_P: | |
6003 | if (builtin_function_validate_nargs (loc, fndecl, nargs, 3)) | |
6004 | { | |
6005 | unsigned i; | |
6006 | for (i = 0; i < 3; i++) | |
6007 | if (!INTEGRAL_TYPE_P (TREE_TYPE (args[i]))) | |
6008 | { | |
6009 | error_at (ARG_LOCATION (i), "argument %u in call to function " | |
6010 | "%qE does not have integral type", i + 1, fndecl); | |
6011 | return false; | |
6012 | } | |
77104764 | 6013 | if (TREE_CODE (TREE_TYPE (args[2])) == ENUMERAL_TYPE) |
6014 | { | |
6015 | error_at (ARG_LOCATION (2), "argument 3 in call to function " | |
6016 | "%qE has enumerated type", fndecl); | |
6017 | return false; | |
6018 | } | |
6019 | else if (TREE_CODE (TREE_TYPE (args[2])) == BOOLEAN_TYPE) | |
6020 | { | |
6021 | error_at (ARG_LOCATION (2), "argument 3 in call to function " | |
6022 | "%qE has boolean type", fndecl); | |
6023 | return false; | |
6024 | } | |
732905bb | 6025 | return true; |
6026 | } | |
6027 | return false; | |
6028 | ||
d43cee80 | 6029 | default: |
6030 | return true; | |
6031 | } | |
6032 | } | |
6033 | ||
209c9752 | 6034 | /* Subroutine of c_parse_error. |
6035 | Return the result of concatenating LHS and RHS. RHS is really | |
6036 | a string literal, its first character is indicated by RHS_START and | |
cfee01e3 | 6037 | RHS_SIZE is its length (including the terminating NUL character). |
209c9752 | 6038 | |
6039 | The caller is responsible for deleting the returned pointer. */ | |
6040 | ||
6041 | static char * | |
6042 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
6043 | { | |
d8aad786 | 6044 | const size_t lhs_size = strlen (lhs); |
209c9752 | 6045 | char *result = XNEWVEC (char, lhs_size + rhs_size); |
d8aad786 | 6046 | memcpy (result, lhs, lhs_size); |
6047 | memcpy (result + lhs_size, rhs_start, rhs_size); | |
209c9752 | 6048 | return result; |
6049 | } | |
6050 | ||
3fe34694 | 6051 | /* Issue the error given by GMSGID at RICHLOC, indicating that it occurred |
6052 | before TOKEN, which had the associated VALUE. */ | |
92b128ed | 6053 | |
6054 | void | |
48e1416a | 6055 | c_parse_error (const char *gmsgid, enum cpp_ttype token_type, |
3fe34694 | 6056 | tree value, unsigned char token_flags, |
6057 | rich_location *richloc) | |
92b128ed | 6058 | { |
209c9752 | 6059 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
6060 | ||
6061 | char *message = NULL; | |
92b128ed | 6062 | |
ba99525e | 6063 | if (token_type == CPP_EOF) |
380c6697 | 6064 | message = catenate_messages (gmsgid, " at end of input"); |
48e1416a | 6065 | else if (token_type == CPP_CHAR |
6066 | || token_type == CPP_WCHAR | |
ba99525e | 6067 | || token_type == CPP_CHAR16 |
30b1ba42 | 6068 | || token_type == CPP_CHAR32 |
6069 | || token_type == CPP_UTF8CHAR) | |
92b128ed | 6070 | { |
f9ae6f95 | 6071 | unsigned int val = TREE_INT_CST_LOW (value); |
924bbf02 | 6072 | const char *prefix; |
6073 | ||
ba99525e | 6074 | switch (token_type) |
924bbf02 | 6075 | { |
6076 | default: | |
6077 | prefix = ""; | |
6078 | break; | |
6079 | case CPP_WCHAR: | |
6080 | prefix = "L"; | |
6081 | break; | |
6082 | case CPP_CHAR16: | |
6083 | prefix = "u"; | |
6084 | break; | |
6085 | case CPP_CHAR32: | |
6086 | prefix = "U"; | |
6087 | break; | |
30b1ba42 | 6088 | case CPP_UTF8CHAR: |
6089 | prefix = "u8"; | |
6090 | break; | |
924bbf02 | 6091 | } |
6092 | ||
92b128ed | 6093 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
a0c938f0 | 6094 | message = catenate_messages (gmsgid, " before %s'%c'"); |
92b128ed | 6095 | else |
a0c938f0 | 6096 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
209c9752 | 6097 | |
3b6578b3 | 6098 | error_at (richloc, message, prefix, val); |
209c9752 | 6099 | free (message); |
6100 | message = NULL; | |
92b128ed | 6101 | } |
1898176c | 6102 | else if (token_type == CPP_CHAR_USERDEF |
6103 | || token_type == CPP_WCHAR_USERDEF | |
6104 | || token_type == CPP_CHAR16_USERDEF | |
30b1ba42 | 6105 | || token_type == CPP_CHAR32_USERDEF |
6106 | || token_type == CPP_UTF8CHAR_USERDEF) | |
1898176c | 6107 | message = catenate_messages (gmsgid, |
6108 | " before user-defined character literal"); | |
6109 | else if (token_type == CPP_STRING_USERDEF | |
6110 | || token_type == CPP_WSTRING_USERDEF | |
6111 | || token_type == CPP_STRING16_USERDEF | |
6112 | || token_type == CPP_STRING32_USERDEF | |
6113 | || token_type == CPP_UTF8STRING_USERDEF) | |
6114 | message = catenate_messages (gmsgid, " before user-defined string literal"); | |
48e1416a | 6115 | else if (token_type == CPP_STRING |
6116 | || token_type == CPP_WSTRING | |
ba99525e | 6117 | || token_type == CPP_STRING16 |
538ba11a | 6118 | || token_type == CPP_STRING32 |
6119 | || token_type == CPP_UTF8STRING) | |
380c6697 | 6120 | message = catenate_messages (gmsgid, " before string constant"); |
ba99525e | 6121 | else if (token_type == CPP_NUMBER) |
380c6697 | 6122 | message = catenate_messages (gmsgid, " before numeric constant"); |
ba99525e | 6123 | else if (token_type == CPP_NAME) |
209c9752 | 6124 | { |
380c6697 | 6125 | message = catenate_messages (gmsgid, " before %qE"); |
3b6578b3 | 6126 | error_at (richloc, message, value); |
209c9752 | 6127 | free (message); |
6128 | message = NULL; | |
6129 | } | |
ba99525e | 6130 | else if (token_type == CPP_PRAGMA) |
b75b98aa | 6131 | message = catenate_messages (gmsgid, " before %<#pragma%>"); |
ba99525e | 6132 | else if (token_type == CPP_PRAGMA_EOL) |
b75b98aa | 6133 | message = catenate_messages (gmsgid, " before end of line"); |
07b8f133 | 6134 | else if (token_type == CPP_DECLTYPE) |
6135 | message = catenate_messages (gmsgid, " before %<decltype%>"); | |
ba99525e | 6136 | else if (token_type < N_TTYPES) |
209c9752 | 6137 | { |
380c6697 | 6138 | message = catenate_messages (gmsgid, " before %qs token"); |
3b6578b3 | 6139 | error_at (richloc, message, cpp_type2name (token_type, token_flags)); |
209c9752 | 6140 | free (message); |
6141 | message = NULL; | |
6142 | } | |
92b128ed | 6143 | else |
3b6578b3 | 6144 | error_at (richloc, gmsgid); |
209c9752 | 6145 | |
6146 | if (message) | |
6147 | { | |
3b6578b3 | 6148 | error_at (richloc, message); |
209c9752 | 6149 | free (message); |
6150 | } | |
a0c938f0 | 6151 | #undef catenate_messages |
92b128ed | 6152 | } |
6153 | ||
3a79f5da | 6154 | /* Return the gcc option code associated with the reason for a cpp |
6155 | message, or 0 if none. */ | |
6156 | ||
6157 | static int | |
fb225cf1 | 6158 | c_option_controlling_cpp_diagnostic (enum cpp_warning_reason reason) |
3a79f5da | 6159 | { |
7ff8db31 | 6160 | const struct cpp_reason_option_codes_t *entry; |
3a79f5da | 6161 | |
7ff8db31 | 6162 | for (entry = cpp_reason_option_codes; entry->reason != CPP_W_NONE; entry++) |
3a79f5da | 6163 | { |
6164 | if (entry->reason == reason) | |
6165 | return entry->option_code; | |
6166 | } | |
6167 | return 0; | |
6168 | } | |
6169 | ||
fb225cf1 | 6170 | /* Callback from cpp_diagnostic for PFILE to print diagnostics from the |
3a79f5da | 6171 | preprocessor. The diagnostic is of type LEVEL, with REASON set |
6172 | to the reason code if LEVEL is represents a warning, at location | |
f0479000 | 6173 | RICHLOC unless this is after lexing and the compiler's location |
6174 | should be used instead; MSG is the translated message and AP | |
7f5f3953 | 6175 | the arguments. Returns true if a diagnostic was emitted, false |
6176 | otherwise. */ | |
6177 | ||
6178 | bool | |
fb225cf1 | 6179 | c_cpp_diagnostic (cpp_reader *pfile ATTRIBUTE_UNUSED, |
6180 | enum cpp_diagnostic_level level, | |
6181 | enum cpp_warning_reason reason, | |
6182 | rich_location *richloc, | |
6183 | const char *msg, va_list *ap) | |
7f5f3953 | 6184 | { |
6185 | diagnostic_info diagnostic; | |
6186 | diagnostic_t dlevel; | |
5ae82d58 | 6187 | bool save_warn_system_headers = global_dc->dc_warn_system_headers; |
7f5f3953 | 6188 | bool ret; |
6189 | ||
6190 | switch (level) | |
6191 | { | |
6192 | case CPP_DL_WARNING_SYSHDR: | |
6193 | if (flag_no_output) | |
6194 | return false; | |
5ae82d58 | 6195 | global_dc->dc_warn_system_headers = 1; |
7f5f3953 | 6196 | /* Fall through. */ |
6197 | case CPP_DL_WARNING: | |
6198 | if (flag_no_output) | |
6199 | return false; | |
6200 | dlevel = DK_WARNING; | |
6201 | break; | |
6202 | case CPP_DL_PEDWARN: | |
6203 | if (flag_no_output && !flag_pedantic_errors) | |
6204 | return false; | |
6205 | dlevel = DK_PEDWARN; | |
6206 | break; | |
6207 | case CPP_DL_ERROR: | |
6208 | dlevel = DK_ERROR; | |
6209 | break; | |
6210 | case CPP_DL_ICE: | |
6211 | dlevel = DK_ICE; | |
6212 | break; | |
6213 | case CPP_DL_NOTE: | |
6214 | dlevel = DK_NOTE; | |
6215 | break; | |
ff903809 | 6216 | case CPP_DL_FATAL: |
6217 | dlevel = DK_FATAL; | |
6218 | break; | |
7f5f3953 | 6219 | default: |
6220 | gcc_unreachable (); | |
6221 | } | |
6222 | if (done_lexing) | |
5fe20025 | 6223 | richloc->set_range (0, input_location, SHOW_RANGE_WITH_CARET); |
7f5f3953 | 6224 | diagnostic_set_info_translated (&diagnostic, msg, ap, |
f0479000 | 6225 | richloc, dlevel); |
fb225cf1 | 6226 | diagnostic_override_option_index |
6227 | (&diagnostic, | |
6228 | c_option_controlling_cpp_diagnostic (reason)); | |
56b8400f | 6229 | ret = diagnostic_report_diagnostic (global_dc, &diagnostic); |
7f5f3953 | 6230 | if (level == CPP_DL_WARNING_SYSHDR) |
5ae82d58 | 6231 | global_dc->dc_warn_system_headers = save_warn_system_headers; |
7f5f3953 | 6232 | return ret; |
6233 | } | |
6234 | ||
624d37a6 | 6235 | /* Convert a character from the host to the target execution character |
6236 | set. cpplib handles this, mostly. */ | |
6237 | ||
6238 | HOST_WIDE_INT | |
6239 | c_common_to_target_charset (HOST_WIDE_INT c) | |
6240 | { | |
6241 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
6242 | zero-extended under -fno-signed-char. cpplib insists that characters | |
6243 | and character constants are always unsigned. Hence we must convert | |
6244 | back and forth. */ | |
6245 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
6246 | ||
6247 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
6248 | ||
6249 | if (flag_signed_char) | |
6250 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
6251 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
6252 | else | |
6253 | return uc; | |
6254 | } | |
6255 | ||
7549df0d | 6256 | /* Fold an offsetof-like expression. EXPR is a nested sequence of component |
6257 | references with an INDIRECT_REF of a constant at the bottom; much like the | |
3c43ed34 | 6258 | traditional rendering of offsetof as a macro. TYPE is the desired type of |
6259 | the whole expression. Return the folded result. */ | |
af28855b | 6260 | |
7549df0d | 6261 | tree |
3c43ed34 | 6262 | fold_offsetof (tree expr, tree type, enum tree_code ctx) |
af28855b | 6263 | { |
af28855b | 6264 | tree base, off, t; |
aeaccb75 | 6265 | tree_code code = TREE_CODE (expr); |
6266 | switch (code) | |
af28855b | 6267 | { |
6268 | case ERROR_MARK: | |
6269 | return expr; | |
6270 | ||
6b11d2e3 | 6271 | case VAR_DECL: |
6272 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
6273 | return error_mark_node; | |
6274 | ||
d897f7c2 | 6275 | case CALL_EXPR: |
cf1a89a3 | 6276 | case TARGET_EXPR: |
d897f7c2 | 6277 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); |
6278 | return error_mark_node; | |
6279 | ||
d897f7c2 | 6280 | case NOP_EXPR: |
6281 | case INDIRECT_REF: | |
7549df0d | 6282 | if (!TREE_CONSTANT (TREE_OPERAND (expr, 0))) |
64ed018c | 6283 | { |
6284 | error ("cannot apply %<offsetof%> to a non constant address"); | |
6285 | return error_mark_node; | |
6286 | } | |
3c43ed34 | 6287 | return convert (type, TREE_OPERAND (expr, 0)); |
d897f7c2 | 6288 | |
af28855b | 6289 | case COMPONENT_REF: |
3c43ed34 | 6290 | base = fold_offsetof (TREE_OPERAND (expr, 0), type, code); |
af28855b | 6291 | if (base == error_mark_node) |
6292 | return base; | |
6293 | ||
6294 | t = TREE_OPERAND (expr, 1); | |
6295 | if (DECL_C_BIT_FIELD (t)) | |
6296 | { | |
6297 | error ("attempt to take address of bit-field structure " | |
782858b8 | 6298 | "member %qD", t); |
af28855b | 6299 | return error_mark_node; |
6300 | } | |
389dd41b | 6301 | off = size_binop_loc (input_location, PLUS_EXPR, DECL_FIELD_OFFSET (t), |
e913b5cd | 6302 | size_int (tree_to_uhwi (DECL_FIELD_BIT_OFFSET (t)) |
389dd41b | 6303 | / BITS_PER_UNIT)); |
af28855b | 6304 | break; |
6305 | ||
6306 | case ARRAY_REF: | |
3c43ed34 | 6307 | base = fold_offsetof (TREE_OPERAND (expr, 0), type, code); |
af28855b | 6308 | if (base == error_mark_node) |
6309 | return base; | |
6310 | ||
6311 | t = TREE_OPERAND (expr, 1); | |
d582d140 | 6312 | STRIP_ANY_LOCATION_WRAPPER (t); |
64ed018c | 6313 | |
6314 | /* Check if the offset goes beyond the upper bound of the array. */ | |
7549df0d | 6315 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) >= 0) |
e0559d69 | 6316 | { |
6317 | tree upbound = array_ref_up_bound (expr); | |
6318 | if (upbound != NULL_TREE | |
6319 | && TREE_CODE (upbound) == INTEGER_CST | |
6320 | && !tree_int_cst_equal (upbound, | |
6321 | TYPE_MAX_VALUE (TREE_TYPE (upbound)))) | |
6322 | { | |
aeaccb75 | 6323 | if (ctx != ARRAY_REF && ctx != COMPONENT_REF) |
6324 | upbound = size_binop (PLUS_EXPR, upbound, | |
6325 | build_int_cst (TREE_TYPE (upbound), 1)); | |
e0559d69 | 6326 | if (tree_int_cst_lt (upbound, t)) |
6327 | { | |
6328 | tree v; | |
6329 | ||
6330 | for (v = TREE_OPERAND (expr, 0); | |
6331 | TREE_CODE (v) == COMPONENT_REF; | |
6332 | v = TREE_OPERAND (v, 0)) | |
6333 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (v, 0))) | |
6334 | == RECORD_TYPE) | |
6335 | { | |
1767a056 | 6336 | tree fld_chain = DECL_CHAIN (TREE_OPERAND (v, 1)); |
6337 | for (; fld_chain; fld_chain = DECL_CHAIN (fld_chain)) | |
e0559d69 | 6338 | if (TREE_CODE (fld_chain) == FIELD_DECL) |
6339 | break; | |
6340 | ||
6341 | if (fld_chain) | |
6342 | break; | |
6343 | } | |
6344 | /* Don't warn if the array might be considered a poor | |
6345 | man's flexible array member with a very permissive | |
6346 | definition thereof. */ | |
6347 | if (TREE_CODE (v) == ARRAY_REF | |
6348 | || TREE_CODE (v) == COMPONENT_REF) | |
6349 | warning (OPT_Warray_bounds, | |
6350 | "index %E denotes an offset " | |
6351 | "greater than size of %qT", | |
6352 | t, TREE_TYPE (TREE_OPERAND (expr, 0))); | |
6353 | } | |
6354 | } | |
6355 | } | |
7549df0d | 6356 | |
6357 | t = convert (sizetype, t); | |
6358 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
af28855b | 6359 | break; |
6360 | ||
ede90cc2 | 6361 | case COMPOUND_EXPR: |
6362 | /* Handle static members of volatile structs. */ | |
6363 | t = TREE_OPERAND (expr, 1); | |
45685ee6 | 6364 | gcc_checking_assert (VAR_P (get_base_address (t))); |
3c43ed34 | 6365 | return fold_offsetof (t, type); |
ede90cc2 | 6366 | |
af28855b | 6367 | default: |
231bd014 | 6368 | gcc_unreachable (); |
af28855b | 6369 | } |
6370 | ||
3c43ed34 | 6371 | if (!POINTER_TYPE_P (type)) |
6372 | return size_binop (PLUS_EXPR, base, convert (type, off)); | |
7549df0d | 6373 | return fold_build_pointer_plus (base, off); |
af28855b | 6374 | } |
c271bdb2 | 6375 | \f |
6376 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
6377 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
6378 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
6379 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
6380 | ||
6381 | int | |
6382 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
6383 | { | |
6384 | tree maxindex, type, main_type, elt, unqual_elt; | |
6385 | int failure = 0, quals; | |
f5298614 | 6386 | bool overflow_p = false; |
c271bdb2 | 6387 | |
6388 | maxindex = size_zero_node; | |
6389 | if (initial_value) | |
6390 | { | |
d582d140 | 6391 | STRIP_ANY_LOCATION_WRAPPER (initial_value); |
6392 | ||
c271bdb2 | 6393 | if (TREE_CODE (initial_value) == STRING_CST) |
6394 | { | |
6395 | int eltsize | |
6396 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
6397 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
6398 | } | |
6399 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
6400 | { | |
f1f41a6c | 6401 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initial_value); |
c271bdb2 | 6402 | |
f1f41a6c | 6403 | if (vec_safe_is_empty (v)) |
c271bdb2 | 6404 | { |
6405 | if (pedantic) | |
6406 | failure = 3; | |
7542c3b4 | 6407 | maxindex = ssize_int (-1); |
c271bdb2 | 6408 | } |
6409 | else | |
6410 | { | |
6411 | tree curindex; | |
c75b4594 | 6412 | unsigned HOST_WIDE_INT cnt; |
6413 | constructor_elt *ce; | |
cee43f7e | 6414 | bool fold_p = false; |
c271bdb2 | 6415 | |
f1f41a6c | 6416 | if ((*v)[0].index) |
f5298614 | 6417 | maxindex = (*v)[0].index, fold_p = true; |
6418 | ||
c271bdb2 | 6419 | curindex = maxindex; |
6420 | ||
f1f41a6c | 6421 | for (cnt = 1; vec_safe_iterate (v, cnt, &ce); cnt++) |
c271bdb2 | 6422 | { |
cee43f7e | 6423 | bool curfold_p = false; |
c75b4594 | 6424 | if (ce->index) |
cee43f7e | 6425 | curindex = ce->index, curfold_p = true; |
c271bdb2 | 6426 | else |
cee43f7e | 6427 | { |
6428 | if (fold_p) | |
f5298614 | 6429 | { |
6430 | /* Since we treat size types now as ordinary | |
6431 | unsigned types, we need an explicit overflow | |
6432 | check. */ | |
6433 | tree orig = curindex; | |
6434 | curindex = fold_convert (sizetype, curindex); | |
6435 | overflow_p |= tree_int_cst_lt (curindex, orig); | |
6436 | } | |
389dd41b | 6437 | curindex = size_binop (PLUS_EXPR, curindex, |
6438 | size_one_node); | |
cee43f7e | 6439 | } |
c271bdb2 | 6440 | if (tree_int_cst_lt (maxindex, curindex)) |
cee43f7e | 6441 | maxindex = curindex, fold_p = curfold_p; |
c271bdb2 | 6442 | } |
f5298614 | 6443 | if (fold_p) |
6444 | { | |
6445 | tree orig = maxindex; | |
6446 | maxindex = fold_convert (sizetype, maxindex); | |
6447 | overflow_p |= tree_int_cst_lt (maxindex, orig); | |
6448 | } | |
c271bdb2 | 6449 | } |
6450 | } | |
6451 | else | |
6452 | { | |
6453 | /* Make an error message unless that happened already. */ | |
6454 | if (initial_value != error_mark_node) | |
6455 | failure = 1; | |
6456 | } | |
6457 | } | |
6458 | else | |
6459 | { | |
6460 | failure = 2; | |
6461 | if (!do_default) | |
6462 | return failure; | |
6463 | } | |
6464 | ||
6465 | type = *ptype; | |
6466 | elt = TREE_TYPE (type); | |
6467 | quals = TYPE_QUALS (strip_array_types (elt)); | |
6468 | if (quals == 0) | |
6469 | unqual_elt = elt; | |
6470 | else | |
6d5d708e | 6471 | unqual_elt = c_build_qualified_type (elt, KEEP_QUAL_ADDR_SPACE (quals)); |
c271bdb2 | 6472 | |
6473 | /* Using build_distinct_type_copy and modifying things afterward instead | |
6474 | of using build_array_type to create a new type preserves all of the | |
6475 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
6476 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
6477 | TREE_TYPE (main_type) = unqual_elt; | |
783bb57e | 6478 | TYPE_DOMAIN (main_type) |
6479 | = build_range_type (TREE_TYPE (maxindex), | |
6480 | build_int_cst (TREE_TYPE (maxindex), 0), maxindex); | |
6bac87c3 | 6481 | TYPE_TYPELESS_STORAGE (main_type) = TYPE_TYPELESS_STORAGE (type); |
c271bdb2 | 6482 | layout_type (main_type); |
6483 | ||
6753bca0 | 6484 | /* Make sure we have the canonical MAIN_TYPE. */ |
a06321ef | 6485 | hashval_t hashcode = type_hash_canon_hash (main_type); |
6486 | main_type = type_hash_canon (hashcode, main_type); | |
6753bca0 | 6487 | |
796735dc | 6488 | /* Fix the canonical type. */ |
6489 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
6490 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
6491 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
6492 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
6493 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
6494 | != TYPE_DOMAIN (main_type))) | |
48e1416a | 6495 | TYPE_CANONICAL (main_type) |
796735dc | 6496 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), |
6bac87c3 | 6497 | TYPE_CANONICAL (TYPE_DOMAIN (main_type)), |
6498 | TYPE_TYPELESS_STORAGE (main_type)); | |
796735dc | 6499 | else |
6500 | TYPE_CANONICAL (main_type) = main_type; | |
6501 | ||
c271bdb2 | 6502 | if (quals == 0) |
6503 | type = main_type; | |
6504 | else | |
6505 | type = c_build_qualified_type (main_type, quals); | |
6506 | ||
4f5b8f2a | 6507 | if (COMPLETE_TYPE_P (type) |
6508 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
f5298614 | 6509 | && (overflow_p || TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))) |
4f5b8f2a | 6510 | { |
6511 | error ("size of array is too large"); | |
6512 | /* If we proceed with the array type as it is, we'll eventually | |
08f817b3 | 6513 | crash in tree_to_[su]hwi(). */ |
4f5b8f2a | 6514 | type = error_mark_node; |
6515 | } | |
6516 | ||
c271bdb2 | 6517 | *ptype = type; |
6518 | return failure; | |
6519 | } | |
ab6bb714 | 6520 | |
df06d247 | 6521 | /* INIT is an constructor of a structure with a flexible array member. |
6522 | Complete the flexible array member with a domain based on it's value. */ | |
6523 | void | |
6524 | complete_flexible_array_elts (tree init) | |
6525 | { | |
6526 | tree elt, type; | |
6527 | ||
6528 | if (init == NULL_TREE || TREE_CODE (init) != CONSTRUCTOR) | |
6529 | return; | |
6530 | ||
6531 | if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init))) | |
6532 | return; | |
6533 | ||
6534 | elt = CONSTRUCTOR_ELTS (init)->last ().value; | |
6535 | type = TREE_TYPE (elt); | |
6536 | if (TREE_CODE (type) == ARRAY_TYPE | |
6537 | && TYPE_SIZE (type) == NULL_TREE) | |
6538 | complete_array_type (&TREE_TYPE (elt), elt, false); | |
6539 | else | |
6540 | complete_flexible_array_elts (elt); | |
6541 | } | |
6542 | ||
93426222 | 6543 | /* Like c_mark_addressable but don't check register qualifier. */ |
6544 | void | |
6545 | c_common_mark_addressable_vec (tree t) | |
6546 | { | |
b977a7e3 | 6547 | if (TREE_CODE (t) == C_MAYBE_CONST_EXPR) |
6548 | t = C_MAYBE_CONST_EXPR_EXPR (t); | |
93426222 | 6549 | while (handled_component_p (t)) |
6550 | t = TREE_OPERAND (t, 0); | |
4c04bcce | 6551 | if (!VAR_P (t) |
6552 | && TREE_CODE (t) != PARM_DECL | |
6553 | && TREE_CODE (t) != COMPOUND_LITERAL_EXPR) | |
93426222 | 6554 | return; |
3385a573 | 6555 | if (!VAR_P (t) || !DECL_HARD_REGISTER (t)) |
6556 | TREE_ADDRESSABLE (t) = 1; | |
93426222 | 6557 | } |
6558 | ||
6559 | ||
b6a5fc45 | 6560 | \f |
6561 | /* Used to help initialize the builtin-types.def table. When a type of | |
6562 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
6563 | The later results in segfaults even when a decl using the type doesn't | |
6564 | get invoked. */ | |
6565 | ||
6566 | tree | |
6567 | builtin_type_for_size (int size, bool unsignedp) | |
6568 | { | |
a51edb4c | 6569 | tree type = c_common_type_for_size (size, unsignedp); |
b6a5fc45 | 6570 | return type ? type : error_mark_node; |
6571 | } | |
6572 | ||
123081ef | 6573 | /* Work out the size of the first argument of a call to |
6574 | __builtin_speculation_safe_value. Only pointers and integral types | |
6575 | are permitted. Return -1 if the argument type is not supported or | |
6576 | the size is too large; 0 if the argument type is a pointer or the | |
6577 | size if it is integral. */ | |
6578 | static enum built_in_function | |
6579 | speculation_safe_value_resolve_call (tree function, vec<tree, va_gc> *params) | |
6580 | { | |
6581 | /* Type of the argument. */ | |
6582 | tree type; | |
6583 | int size; | |
6584 | ||
6585 | if (vec_safe_is_empty (params)) | |
6586 | { | |
6587 | error ("too few arguments to function %qE", function); | |
6588 | return BUILT_IN_NONE; | |
6589 | } | |
6590 | ||
6591 | type = TREE_TYPE ((*params)[0]); | |
6592 | if (TREE_CODE (type) == ARRAY_TYPE && c_dialect_cxx ()) | |
6593 | { | |
6594 | /* Force array-to-pointer decay for C++. */ | |
6595 | (*params)[0] = default_conversion ((*params)[0]); | |
6596 | type = TREE_TYPE ((*params)[0]); | |
6597 | } | |
6598 | ||
6599 | if (POINTER_TYPE_P (type)) | |
6600 | return BUILT_IN_SPECULATION_SAFE_VALUE_PTR; | |
6601 | ||
6602 | if (!INTEGRAL_TYPE_P (type)) | |
6603 | goto incompatible; | |
6604 | ||
6605 | if (!COMPLETE_TYPE_P (type)) | |
6606 | goto incompatible; | |
6607 | ||
6608 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); | |
6609 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) | |
6610 | return ((enum built_in_function) | |
6611 | ((int) BUILT_IN_SPECULATION_SAFE_VALUE_1 + exact_log2 (size))); | |
6612 | ||
6613 | incompatible: | |
6614 | /* Issue the diagnostic only if the argument is valid, otherwise | |
6615 | it would be redundant at best and could be misleading. */ | |
6616 | if (type != error_mark_node) | |
6617 | error ("operand type %qT is incompatible with argument %d of %qE", | |
6618 | type, 1, function); | |
6619 | ||
6620 | return BUILT_IN_NONE; | |
6621 | } | |
6622 | ||
6623 | /* Validate and coerce PARAMS, the arguments to ORIG_FUNCTION to fit | |
6624 | the prototype for FUNCTION. The first argument is mandatory, a second | |
6625 | argument, if present, must be type compatible with the first. */ | |
6626 | static bool | |
6627 | speculation_safe_value_resolve_params (location_t loc, tree orig_function, | |
6628 | vec<tree, va_gc> *params) | |
6629 | { | |
6630 | tree val; | |
6631 | ||
6632 | if (params->length () == 0) | |
6633 | { | |
6634 | error_at (loc, "too few arguments to function %qE", orig_function); | |
6635 | return false; | |
6636 | } | |
6637 | ||
6638 | else if (params->length () > 2) | |
6639 | { | |
6640 | error_at (loc, "too many arguments to function %qE", orig_function); | |
6641 | return false; | |
6642 | } | |
6643 | ||
6644 | val = (*params)[0]; | |
6645 | if (TREE_CODE (TREE_TYPE (val)) == ARRAY_TYPE) | |
6646 | val = default_conversion (val); | |
6647 | if (!(TREE_CODE (TREE_TYPE (val)) == POINTER_TYPE | |
6648 | || TREE_CODE (TREE_TYPE (val)) == INTEGER_TYPE)) | |
6649 | { | |
6650 | error_at (loc, | |
6651 | "expecting argument of type pointer or of type integer " | |
6652 | "for argument 1"); | |
6653 | return false; | |
6654 | } | |
6655 | (*params)[0] = val; | |
6656 | ||
6657 | if (params->length () == 2) | |
6658 | { | |
6659 | tree val2 = (*params)[1]; | |
6660 | if (TREE_CODE (TREE_TYPE (val2)) == ARRAY_TYPE) | |
6661 | val2 = default_conversion (val2); | |
6662 | if (!(TREE_TYPE (val) == TREE_TYPE (val2) | |
6663 | || useless_type_conversion_p (TREE_TYPE (val), TREE_TYPE (val2)))) | |
6664 | { | |
6665 | error_at (loc, "both arguments must be compatible"); | |
6666 | return false; | |
6667 | } | |
6668 | (*params)[1] = val2; | |
6669 | } | |
6670 | ||
6671 | return true; | |
6672 | } | |
6673 | ||
6674 | /* Cast the result of the builtin back to the type of the first argument, | |
6675 | preserving any qualifiers that it might have. */ | |
6676 | static tree | |
6677 | speculation_safe_value_resolve_return (tree first_param, tree result) | |
6678 | { | |
6679 | tree ptype = TREE_TYPE (first_param); | |
6680 | tree rtype = TREE_TYPE (result); | |
6681 | ptype = TYPE_MAIN_VARIANT (ptype); | |
6682 | ||
6683 | if (tree_int_cst_equal (TYPE_SIZE (ptype), TYPE_SIZE (rtype))) | |
6684 | return convert (ptype, result); | |
6685 | ||
6686 | return result; | |
6687 | } | |
6688 | ||
b6a5fc45 | 6689 | /* A helper function for resolve_overloaded_builtin in resolving the |
6690 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
6691 | first operand of PARAMS is a pointer to a supported data type. | |
517906ff | 6692 | Returns 0 if an error is encountered. |
6693 | FETCH is true when FUNCTION is one of the _FETCH_OP_ or _OP_FETCH_ | |
6694 | built-ins. */ | |
b6a5fc45 | 6695 | |
6696 | static int | |
517906ff | 6697 | sync_resolve_size (tree function, vec<tree, va_gc> *params, bool fetch) |
b6a5fc45 | 6698 | { |
517906ff | 6699 | /* Type of the argument. */ |
6700 | tree argtype; | |
6701 | /* Type the argument points to. */ | |
b6a5fc45 | 6702 | tree type; |
6703 | int size; | |
6704 | ||
77454e6e | 6705 | if (vec_safe_is_empty (params)) |
b6a5fc45 | 6706 | { |
6707 | error ("too few arguments to function %qE", function); | |
6708 | return 0; | |
6709 | } | |
6710 | ||
517906ff | 6711 | argtype = type = TREE_TYPE ((*params)[0]); |
e69fccfa | 6712 | if (TREE_CODE (type) == ARRAY_TYPE && c_dialect_cxx ()) |
0d284870 | 6713 | { |
6714 | /* Force array-to-pointer decay for C++. */ | |
0d284870 | 6715 | (*params)[0] = default_conversion ((*params)[0]); |
6716 | type = TREE_TYPE ((*params)[0]); | |
6717 | } | |
b6a5fc45 | 6718 | if (TREE_CODE (type) != POINTER_TYPE) |
6719 | goto incompatible; | |
6720 | ||
6721 | type = TREE_TYPE (type); | |
6722 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
6723 | goto incompatible; | |
6724 | ||
c18b3f9b | 6725 | if (!COMPLETE_TYPE_P (type)) |
6726 | goto incompatible; | |
6727 | ||
517906ff | 6728 | if (fetch && TREE_CODE (type) == BOOLEAN_TYPE) |
6729 | goto incompatible; | |
6730 | ||
e913b5cd | 6731 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
27213ba3 | 6732 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
b6a5fc45 | 6733 | return size; |
6734 | ||
6735 | incompatible: | |
bbbbe8ab | 6736 | /* Issue the diagnostic only if the argument is valid, otherwise |
6737 | it would be redundant at best and could be misleading. */ | |
6738 | if (argtype != error_mark_node) | |
6739 | error ("operand type %qT is incompatible with argument %d of %qE", | |
6740 | argtype, 1, function); | |
b6a5fc45 | 6741 | return 0; |
6742 | } | |
6743 | ||
a0c938f0 | 6744 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
b6a5fc45 | 6745 | PARAMS to make arguments match up with those of FUNCTION. Drops |
6746 | the variadic arguments at the end. Returns false if some error | |
6747 | was encountered; true on success. */ | |
6748 | ||
6749 | static bool | |
1cd6e20d | 6750 | sync_resolve_params (location_t loc, tree orig_function, tree function, |
f1f41a6c | 6751 | vec<tree, va_gc> *params, bool orig_format) |
b6a5fc45 | 6752 | { |
d0af78c5 | 6753 | function_args_iterator iter; |
b6a5fc45 | 6754 | tree ptype; |
b9c74b4d | 6755 | unsigned int parmnum; |
b6a5fc45 | 6756 | |
d0af78c5 | 6757 | function_args_iter_init (&iter, TREE_TYPE (function)); |
b6a5fc45 | 6758 | /* We've declared the implementation functions to use "volatile void *" |
6759 | as the pointer parameter, so we shouldn't get any complaints from the | |
6760 | call to check_function_arguments what ever type the user used. */ | |
d0af78c5 | 6761 | function_args_iter_next (&iter); |
f1f41a6c | 6762 | ptype = TREE_TYPE (TREE_TYPE ((*params)[0])); |
b560fabd | 6763 | ptype = TYPE_MAIN_VARIANT (ptype); |
b6a5fc45 | 6764 | |
6765 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
6766 | don't get warnings for passing pointer types, etc. */ | |
b9c74b4d | 6767 | parmnum = 0; |
d0af78c5 | 6768 | while (1) |
b6a5fc45 | 6769 | { |
d0af78c5 | 6770 | tree val, arg_type; |
6771 | ||
6772 | arg_type = function_args_iter_cond (&iter); | |
6773 | /* XXX void_type_node belies the abstraction. */ | |
6774 | if (arg_type == void_type_node) | |
6775 | break; | |
b6a5fc45 | 6776 | |
b9c74b4d | 6777 | ++parmnum; |
f1f41a6c | 6778 | if (params->length () <= parmnum) |
b6a5fc45 | 6779 | { |
1cd6e20d | 6780 | error_at (loc, "too few arguments to function %qE", orig_function); |
b6a5fc45 | 6781 | return false; |
6782 | } | |
6783 | ||
0f6a7cb7 | 6784 | /* Only convert parameters if arg_type is unsigned integer type with |
6785 | new format sync routines, i.e. don't attempt to convert pointer | |
6786 | arguments (e.g. EXPECTED argument of __atomic_compare_exchange_n), | |
6787 | bool arguments (e.g. WEAK argument) or signed int arguments (memmodel | |
6788 | kinds). */ | |
6789 | if (TREE_CODE (arg_type) == INTEGER_TYPE && TYPE_UNSIGNED (arg_type)) | |
1cd6e20d | 6790 | { |
6791 | /* Ideally for the first conversion we'd use convert_for_assignment | |
6792 | so that we get warnings for anything that doesn't match the pointer | |
6793 | type. This isn't portable across the C and C++ front ends atm. */ | |
f1f41a6c | 6794 | val = (*params)[parmnum]; |
1cd6e20d | 6795 | val = convert (ptype, val); |
6796 | val = convert (arg_type, val); | |
f1f41a6c | 6797 | (*params)[parmnum] = val; |
1cd6e20d | 6798 | } |
b6a5fc45 | 6799 | |
d0af78c5 | 6800 | function_args_iter_next (&iter); |
b6a5fc45 | 6801 | } |
6802 | ||
1cd6e20d | 6803 | /* __atomic routines are not variadic. */ |
f1f41a6c | 6804 | if (!orig_format && params->length () != parmnum + 1) |
1cd6e20d | 6805 | { |
6806 | error_at (loc, "too many arguments to function %qE", orig_function); | |
6807 | return false; | |
6808 | } | |
6809 | ||
b6a5fc45 | 6810 | /* The definition of these primitives is variadic, with the remaining |
6811 | being "an optional list of variables protected by the memory barrier". | |
6812 | No clue what that's supposed to mean, precisely, but we consider all | |
6813 | call-clobbered variables to be protected so we're safe. */ | |
f1f41a6c | 6814 | params->truncate (parmnum + 1); |
b6a5fc45 | 6815 | |
6816 | return true; | |
6817 | } | |
6818 | ||
a0c938f0 | 6819 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
b6a5fc45 | 6820 | RESULT to make it match the type of the first pointer argument in |
6821 | PARAMS. */ | |
6822 | ||
6823 | static tree | |
1cd6e20d | 6824 | sync_resolve_return (tree first_param, tree result, bool orig_format) |
b6a5fc45 | 6825 | { |
b9c74b4d | 6826 | tree ptype = TREE_TYPE (TREE_TYPE (first_param)); |
1cd6e20d | 6827 | tree rtype = TREE_TYPE (result); |
10080eac | 6828 | ptype = TYPE_MAIN_VARIANT (ptype); |
1cd6e20d | 6829 | |
6830 | /* New format doesn't require casting unless the types are the same size. */ | |
6831 | if (orig_format || tree_int_cst_equal (TYPE_SIZE (ptype), TYPE_SIZE (rtype))) | |
6832 | return convert (ptype, result); | |
6833 | else | |
6834 | return result; | |
6835 | } | |
6836 | ||
6837 | /* This function verifies the PARAMS to generic atomic FUNCTION. | |
6838 | It returns the size if all the parameters are the same size, otherwise | |
6839 | 0 is returned if the parameters are invalid. */ | |
6840 | ||
6841 | static int | |
f1f41a6c | 6842 | get_atomic_generic_size (location_t loc, tree function, |
6843 | vec<tree, va_gc> *params) | |
1cd6e20d | 6844 | { |
6845 | unsigned int n_param; | |
6846 | unsigned int n_model; | |
6847 | unsigned int x; | |
6848 | int size_0; | |
6849 | tree type_0; | |
6850 | ||
6851 | /* Determine the parameter makeup. */ | |
6852 | switch (DECL_FUNCTION_CODE (function)) | |
6853 | { | |
6854 | case BUILT_IN_ATOMIC_EXCHANGE: | |
6855 | n_param = 4; | |
6856 | n_model = 1; | |
6857 | break; | |
6858 | case BUILT_IN_ATOMIC_LOAD: | |
6859 | case BUILT_IN_ATOMIC_STORE: | |
6860 | n_param = 3; | |
6861 | n_model = 1; | |
6862 | break; | |
6863 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
6864 | n_param = 6; | |
6865 | n_model = 2; | |
6866 | break; | |
6867 | default: | |
1d581089 | 6868 | gcc_unreachable (); |
1cd6e20d | 6869 | } |
6870 | ||
f1f41a6c | 6871 | if (vec_safe_length (params) != n_param) |
1cd6e20d | 6872 | { |
6873 | error_at (loc, "incorrect number of arguments to function %qE", function); | |
6874 | return 0; | |
6875 | } | |
6876 | ||
6877 | /* Get type of first parameter, and determine its size. */ | |
f1f41a6c | 6878 | type_0 = TREE_TYPE ((*params)[0]); |
e69fccfa | 6879 | if (TREE_CODE (type_0) == ARRAY_TYPE && c_dialect_cxx ()) |
0d284870 | 6880 | { |
6881 | /* Force array-to-pointer decay for C++. */ | |
0d284870 | 6882 | (*params)[0] = default_conversion ((*params)[0]); |
6883 | type_0 = TREE_TYPE ((*params)[0]); | |
6884 | } | |
1d581089 | 6885 | if (TREE_CODE (type_0) != POINTER_TYPE || VOID_TYPE_P (TREE_TYPE (type_0))) |
6886 | { | |
6887 | error_at (loc, "argument 1 of %qE must be a non-void pointer type", | |
6888 | function); | |
6889 | return 0; | |
6890 | } | |
6891 | ||
6892 | /* Types must be compile time constant sizes. */ | |
6893 | if (TREE_CODE ((TYPE_SIZE_UNIT (TREE_TYPE (type_0)))) != INTEGER_CST) | |
1cd6e20d | 6894 | { |
1d581089 | 6895 | error_at (loc, |
6896 | "argument 1 of %qE must be a pointer to a constant size type", | |
6897 | function); | |
1cd6e20d | 6898 | return 0; |
6899 | } | |
1d581089 | 6900 | |
e913b5cd | 6901 | size_0 = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type_0))); |
1cd6e20d | 6902 | |
1d581089 | 6903 | /* Zero size objects are not allowed. */ |
6904 | if (size_0 == 0) | |
6905 | { | |
6906 | error_at (loc, | |
6907 | "argument 1 of %qE must be a pointer to a nonzero size object", | |
6908 | function); | |
6909 | return 0; | |
6910 | } | |
6911 | ||
1cd6e20d | 6912 | /* Check each other parameter is a pointer and the same size. */ |
6913 | for (x = 0; x < n_param - n_model; x++) | |
6914 | { | |
6915 | int size; | |
f1f41a6c | 6916 | tree type = TREE_TYPE ((*params)[x]); |
a04e8d62 | 6917 | /* __atomic_compare_exchange has a bool in the 4th position, skip it. */ |
1cd6e20d | 6918 | if (n_param == 6 && x == 3) |
6919 | continue; | |
e69fccfa | 6920 | if (TREE_CODE (type) == ARRAY_TYPE && c_dialect_cxx ()) |
6921 | { | |
6922 | /* Force array-to-pointer decay for C++. */ | |
6923 | (*params)[x] = default_conversion ((*params)[x]); | |
6924 | type = TREE_TYPE ((*params)[x]); | |
6925 | } | |
1cd6e20d | 6926 | if (!POINTER_TYPE_P (type)) |
6927 | { | |
6928 | error_at (loc, "argument %d of %qE must be a pointer type", x + 1, | |
6929 | function); | |
6930 | return 0; | |
6931 | } | |
26040f06 | 6932 | else if (TYPE_SIZE_UNIT (TREE_TYPE (type)) |
6933 | && TREE_CODE ((TYPE_SIZE_UNIT (TREE_TYPE (type)))) | |
6934 | != INTEGER_CST) | |
6935 | { | |
6936 | error_at (loc, "argument %d of %qE must be a pointer to a constant " | |
6937 | "size type", x + 1, function); | |
6938 | return 0; | |
6939 | } | |
6940 | else if (FUNCTION_POINTER_TYPE_P (type)) | |
6941 | { | |
6942 | error_at (loc, "argument %d of %qE must not be a pointer to a " | |
6943 | "function", x + 1, function); | |
6944 | return 0; | |
6945 | } | |
1f6be080 | 6946 | tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
6947 | size = type_size ? tree_to_uhwi (type_size) : 0; | |
1cd6e20d | 6948 | if (size != size_0) |
6949 | { | |
6950 | error_at (loc, "size mismatch in argument %d of %qE", x + 1, | |
6951 | function); | |
6952 | return 0; | |
6953 | } | |
6954 | } | |
6955 | ||
6956 | /* Check memory model parameters for validity. */ | |
6957 | for (x = n_param - n_model ; x < n_param; x++) | |
6958 | { | |
f1f41a6c | 6959 | tree p = (*params)[x]; |
d76863c8 | 6960 | if (!INTEGRAL_TYPE_P (TREE_TYPE (p))) |
6961 | { | |
6962 | error_at (loc, "non-integer memory model argument %d of %qE", x + 1, | |
6963 | function); | |
6964 | return 0; | |
6965 | } | |
6966 | p = fold_for_warn (p); | |
1cd6e20d | 6967 | if (TREE_CODE (p) == INTEGER_CST) |
d76863c8 | 6968 | { |
72f46c23 | 6969 | /* memmodel_base masks the low 16 bits, thus ignore any bits above |
6970 | it by using TREE_INT_CST_LOW instead of tree_to_*hwi. Those high | |
6971 | bits will be checked later during expansion in target specific | |
6972 | way. */ | |
6973 | if (memmodel_base (TREE_INT_CST_LOW (p)) >= MEMMODEL_LAST) | |
6974 | warning_at (loc, OPT_Winvalid_memory_model, | |
6975 | "invalid memory model argument %d of %qE", x + 1, | |
6976 | function); | |
1cd6e20d | 6977 | } |
d76863c8 | 6978 | } |
1cd6e20d | 6979 | |
6980 | return size_0; | |
6981 | } | |
6982 | ||
6983 | ||
6984 | /* This will take an __atomic_ generic FUNCTION call, and add a size parameter N | |
6985 | at the beginning of the parameter list PARAMS representing the size of the | |
6986 | objects. This is to match the library ABI requirement. LOC is the location | |
6987 | of the function call. | |
6988 | The new function is returned if it needed rebuilding, otherwise NULL_TREE is | |
6989 | returned to allow the external call to be constructed. */ | |
6990 | ||
6991 | static tree | |
6992 | add_atomic_size_parameter (unsigned n, location_t loc, tree function, | |
f1f41a6c | 6993 | vec<tree, va_gc> *params) |
1cd6e20d | 6994 | { |
6995 | tree size_node; | |
6996 | ||
6997 | /* Insert a SIZE_T parameter as the first param. If there isn't | |
6998 | enough space, allocate a new vector and recursively re-build with that. */ | |
f1f41a6c | 6999 | if (!params->space (1)) |
1cd6e20d | 7000 | { |
7001 | unsigned int z, len; | |
f1f41a6c | 7002 | vec<tree, va_gc> *v; |
1cd6e20d | 7003 | tree f; |
7004 | ||
f1f41a6c | 7005 | len = params->length (); |
7006 | vec_alloc (v, len + 1); | |
5a672e62 | 7007 | v->quick_push (build_int_cst (size_type_node, n)); |
1cd6e20d | 7008 | for (z = 0; z < len; z++) |
f1f41a6c | 7009 | v->quick_push ((*params)[z]); |
ec761d5a | 7010 | f = build_function_call_vec (loc, vNULL, function, v, NULL); |
f1f41a6c | 7011 | vec_free (v); |
1cd6e20d | 7012 | return f; |
7013 | } | |
7014 | ||
7015 | /* Add the size parameter and leave as a function call for processing. */ | |
7016 | size_node = build_int_cst (size_type_node, n); | |
f1f41a6c | 7017 | params->quick_insert (0, size_node); |
1cd6e20d | 7018 | return NULL_TREE; |
7019 | } | |
7020 | ||
7021 | ||
a056826c | 7022 | /* Return whether atomic operations for naturally aligned N-byte |
7023 | arguments are supported, whether inline or through libatomic. */ | |
7024 | static bool | |
7025 | atomic_size_supported_p (int n) | |
7026 | { | |
7027 | switch (n) | |
7028 | { | |
7029 | case 1: | |
7030 | case 2: | |
7031 | case 4: | |
7032 | case 8: | |
7033 | return true; | |
7034 | ||
7035 | case 16: | |
7036 | return targetm.scalar_mode_supported_p (TImode); | |
7037 | ||
7038 | default: | |
7039 | return false; | |
7040 | } | |
7041 | } | |
7042 | ||
1cd6e20d | 7043 | /* This will process an __atomic_exchange function call, determine whether it |
7044 | needs to be mapped to the _N variation, or turned into a library call. | |
7045 | LOC is the location of the builtin call. | |
7046 | FUNCTION is the DECL that has been invoked; | |
7047 | PARAMS is the argument list for the call. The return value is non-null | |
7048 | TRUE is returned if it is translated into the proper format for a call to the | |
7049 | external library, and NEW_RETURN is set the tree for that function. | |
7050 | FALSE is returned if processing for the _N variation is required, and | |
47ae02b7 | 7051 | NEW_RETURN is set to the return value the result is copied into. */ |
1cd6e20d | 7052 | static bool |
7053 | resolve_overloaded_atomic_exchange (location_t loc, tree function, | |
f1f41a6c | 7054 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 7055 | { |
7056 | tree p0, p1, p2, p3; | |
7057 | tree I_type, I_type_ptr; | |
7058 | int n = get_atomic_generic_size (loc, function, params); | |
7059 | ||
1d581089 | 7060 | /* Size of 0 is an error condition. */ |
7061 | if (n == 0) | |
7062 | { | |
7063 | *new_return = error_mark_node; | |
7064 | return true; | |
7065 | } | |
7066 | ||
1cd6e20d | 7067 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 7068 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 7069 | { |
7070 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
7071 | return true; | |
7072 | } | |
7073 | ||
7074 | /* Otherwise there is a lockfree match, transform the call from: | |
7075 | void fn(T* mem, T* desired, T* return, model) | |
7076 | into | |
7077 | *return = (T) (fn (In* mem, (In) *desired, model)) */ | |
7078 | ||
f1f41a6c | 7079 | p0 = (*params)[0]; |
7080 | p1 = (*params)[1]; | |
7081 | p2 = (*params)[2]; | |
7082 | p3 = (*params)[3]; | |
1cd6e20d | 7083 | |
7084 | /* Create pointer to appropriate size. */ | |
7085 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
7086 | I_type_ptr = build_pointer_type (I_type); | |
7087 | ||
7088 | /* Convert object pointer to required type. */ | |
7089 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 7090 | (*params)[0] = p0; |
1cd6e20d | 7091 | /* Convert new value to required type, and dereference it. */ |
7092 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
7093 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 7094 | (*params)[1] = p1; |
1cd6e20d | 7095 | |
7096 | /* Move memory model to the 3rd position, and end param list. */ | |
f1f41a6c | 7097 | (*params)[2] = p3; |
7098 | params->truncate (3); | |
1cd6e20d | 7099 | |
7100 | /* Convert return pointer and dereference it for later assignment. */ | |
7101 | *new_return = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
7102 | ||
7103 | return false; | |
b6a5fc45 | 7104 | } |
7105 | ||
1cd6e20d | 7106 | |
7107 | /* This will process an __atomic_compare_exchange function call, determine | |
7108 | whether it needs to be mapped to the _N variation, or turned into a lib call. | |
7109 | LOC is the location of the builtin call. | |
7110 | FUNCTION is the DECL that has been invoked; | |
7111 | PARAMS is the argument list for the call. The return value is non-null | |
7112 | TRUE is returned if it is translated into the proper format for a call to the | |
7113 | external library, and NEW_RETURN is set the tree for that function. | |
7114 | FALSE is returned if processing for the _N variation is required. */ | |
7115 | ||
7116 | static bool | |
7117 | resolve_overloaded_atomic_compare_exchange (location_t loc, tree function, | |
f1f41a6c | 7118 | vec<tree, va_gc> *params, |
1cd6e20d | 7119 | tree *new_return) |
7120 | { | |
7121 | tree p0, p1, p2; | |
7122 | tree I_type, I_type_ptr; | |
7123 | int n = get_atomic_generic_size (loc, function, params); | |
7124 | ||
1d581089 | 7125 | /* Size of 0 is an error condition. */ |
7126 | if (n == 0) | |
7127 | { | |
7128 | *new_return = error_mark_node; | |
7129 | return true; | |
7130 | } | |
7131 | ||
1cd6e20d | 7132 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 7133 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 7134 | { |
7135 | /* The library generic format does not have the weak parameter, so | |
7136 | remove it from the param list. Since a parameter has been removed, | |
7137 | we can be sure that there is room for the SIZE_T parameter, meaning | |
7138 | there will not be a recursive rebuilding of the parameter list, so | |
7139 | there is no danger this will be done twice. */ | |
7140 | if (n > 0) | |
7141 | { | |
f1f41a6c | 7142 | (*params)[3] = (*params)[4]; |
7143 | (*params)[4] = (*params)[5]; | |
7144 | params->truncate (5); | |
1cd6e20d | 7145 | } |
7146 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
7147 | return true; | |
7148 | } | |
7149 | ||
7150 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
7151 | bool fn(T* mem, T* desired, T* return, weak, success, failure) | |
7152 | into | |
7153 | bool fn ((In *)mem, (In *)expected, (In) *desired, weak, succ, fail) */ | |
ab2c1de8 | 7154 | |
f1f41a6c | 7155 | p0 = (*params)[0]; |
7156 | p1 = (*params)[1]; | |
7157 | p2 = (*params)[2]; | |
1cd6e20d | 7158 | |
7159 | /* Create pointer to appropriate size. */ | |
7160 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
7161 | I_type_ptr = build_pointer_type (I_type); | |
7162 | ||
7163 | /* Convert object pointer to required type. */ | |
7164 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 7165 | (*params)[0] = p0; |
1cd6e20d | 7166 | |
7167 | /* Convert expected pointer to required type. */ | |
7168 | p1 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p1); | |
f1f41a6c | 7169 | (*params)[1] = p1; |
1cd6e20d | 7170 | |
7171 | /* Convert desired value to required type, and dereference it. */ | |
7172 | p2 = build_indirect_ref (loc, p2, RO_UNARY_STAR); | |
7173 | p2 = build1 (VIEW_CONVERT_EXPR, I_type, p2); | |
f1f41a6c | 7174 | (*params)[2] = p2; |
1cd6e20d | 7175 | |
7176 | /* The rest of the parameters are fine. NULL means no special return value | |
7177 | processing.*/ | |
7178 | *new_return = NULL; | |
7179 | return false; | |
7180 | } | |
7181 | ||
7182 | ||
7183 | /* This will process an __atomic_load function call, determine whether it | |
7184 | needs to be mapped to the _N variation, or turned into a library call. | |
7185 | LOC is the location of the builtin call. | |
7186 | FUNCTION is the DECL that has been invoked; | |
7187 | PARAMS is the argument list for the call. The return value is non-null | |
7188 | TRUE is returned if it is translated into the proper format for a call to the | |
7189 | external library, and NEW_RETURN is set the tree for that function. | |
7190 | FALSE is returned if processing for the _N variation is required, and | |
47ae02b7 | 7191 | NEW_RETURN is set to the return value the result is copied into. */ |
1cd6e20d | 7192 | |
7193 | static bool | |
7194 | resolve_overloaded_atomic_load (location_t loc, tree function, | |
f1f41a6c | 7195 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 7196 | { |
7197 | tree p0, p1, p2; | |
7198 | tree I_type, I_type_ptr; | |
7199 | int n = get_atomic_generic_size (loc, function, params); | |
7200 | ||
1d581089 | 7201 | /* Size of 0 is an error condition. */ |
7202 | if (n == 0) | |
7203 | { | |
7204 | *new_return = error_mark_node; | |
7205 | return true; | |
7206 | } | |
7207 | ||
1cd6e20d | 7208 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 7209 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 7210 | { |
7211 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
7212 | return true; | |
7213 | } | |
7214 | ||
7215 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
7216 | void fn(T* mem, T* return, model) | |
7217 | into | |
7218 | *return = (T) (fn ((In *) mem, model)) */ | |
7219 | ||
f1f41a6c | 7220 | p0 = (*params)[0]; |
7221 | p1 = (*params)[1]; | |
7222 | p2 = (*params)[2]; | |
1cd6e20d | 7223 | |
7224 | /* Create pointer to appropriate size. */ | |
7225 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
7226 | I_type_ptr = build_pointer_type (I_type); | |
7227 | ||
7228 | /* Convert object pointer to required type. */ | |
7229 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 7230 | (*params)[0] = p0; |
1cd6e20d | 7231 | |
7232 | /* Move memory model to the 2nd position, and end param list. */ | |
f1f41a6c | 7233 | (*params)[1] = p2; |
7234 | params->truncate (2); | |
1cd6e20d | 7235 | |
7236 | /* Convert return pointer and dereference it for later assignment. */ | |
7237 | *new_return = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
7238 | ||
7239 | return false; | |
7240 | } | |
7241 | ||
7242 | ||
7243 | /* This will process an __atomic_store function call, determine whether it | |
7244 | needs to be mapped to the _N variation, or turned into a library call. | |
7245 | LOC is the location of the builtin call. | |
7246 | FUNCTION is the DECL that has been invoked; | |
7247 | PARAMS is the argument list for the call. The return value is non-null | |
7248 | TRUE is returned if it is translated into the proper format for a call to the | |
7249 | external library, and NEW_RETURN is set the tree for that function. | |
7250 | FALSE is returned if processing for the _N variation is required, and | |
47ae02b7 | 7251 | NEW_RETURN is set to the return value the result is copied into. */ |
1cd6e20d | 7252 | |
7253 | static bool | |
7254 | resolve_overloaded_atomic_store (location_t loc, tree function, | |
f1f41a6c | 7255 | vec<tree, va_gc> *params, tree *new_return) |
1cd6e20d | 7256 | { |
7257 | tree p0, p1; | |
7258 | tree I_type, I_type_ptr; | |
7259 | int n = get_atomic_generic_size (loc, function, params); | |
7260 | ||
1d581089 | 7261 | /* Size of 0 is an error condition. */ |
7262 | if (n == 0) | |
7263 | { | |
7264 | *new_return = error_mark_node; | |
7265 | return true; | |
7266 | } | |
7267 | ||
1cd6e20d | 7268 | /* If not a lock-free size, change to the library generic format. */ |
a056826c | 7269 | if (!atomic_size_supported_p (n)) |
1cd6e20d | 7270 | { |
7271 | *new_return = add_atomic_size_parameter (n, loc, function, params); | |
7272 | return true; | |
7273 | } | |
7274 | ||
7275 | /* Otherwise, there is a match, so the call needs to be transformed from: | |
7276 | void fn(T* mem, T* value, model) | |
7277 | into | |
7278 | fn ((In *) mem, (In) *value, model) */ | |
7279 | ||
f1f41a6c | 7280 | p0 = (*params)[0]; |
7281 | p1 = (*params)[1]; | |
1cd6e20d | 7282 | |
7283 | /* Create pointer to appropriate size. */ | |
7284 | I_type = builtin_type_for_size (BITS_PER_UNIT * n, 1); | |
7285 | I_type_ptr = build_pointer_type (I_type); | |
7286 | ||
7287 | /* Convert object pointer to required type. */ | |
7288 | p0 = build1 (VIEW_CONVERT_EXPR, I_type_ptr, p0); | |
f1f41a6c | 7289 | (*params)[0] = p0; |
1cd6e20d | 7290 | |
7291 | /* Convert new value to required type, and dereference it. */ | |
7292 | p1 = build_indirect_ref (loc, p1, RO_UNARY_STAR); | |
7293 | p1 = build1 (VIEW_CONVERT_EXPR, I_type, p1); | |
f1f41a6c | 7294 | (*params)[1] = p1; |
1cd6e20d | 7295 | |
7296 | /* The memory model is in the right spot already. Return is void. */ | |
7297 | *new_return = NULL_TREE; | |
7298 | ||
7299 | return false; | |
7300 | } | |
7301 | ||
7302 | ||
b6a5fc45 | 7303 | /* Some builtin functions are placeholders for other expressions. This |
7304 | function should be called immediately after parsing the call expression | |
7305 | before surrounding code has committed to the type of the expression. | |
7306 | ||
e60a6f7b | 7307 | LOC is the location of the builtin call. |
7308 | ||
b6a5fc45 | 7309 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. |
7310 | PARAMS is the argument list for the call. The return value is non-null | |
7311 | when expansion is complete, and null if normal processing should | |
7312 | continue. */ | |
7313 | ||
7314 | tree | |
f1f41a6c | 7315 | resolve_overloaded_builtin (location_t loc, tree function, |
7316 | vec<tree, va_gc> *params) | |
b6a5fc45 | 7317 | { |
7318 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
517906ff | 7319 | |
7320 | /* Is function one of the _FETCH_OP_ or _OP_FETCH_ built-ins? | |
7321 | Those are not valid to call with a pointer to _Bool (or C++ bool) | |
7322 | and so must be rejected. */ | |
7323 | bool fetch_op = true; | |
1cd6e20d | 7324 | bool orig_format = true; |
7325 | tree new_return = NULL_TREE; | |
7326 | ||
65441f6f | 7327 | switch (DECL_BUILT_IN_CLASS (function)) |
7328 | { | |
7329 | case BUILT_IN_NORMAL: | |
7330 | break; | |
7331 | case BUILT_IN_MD: | |
7332 | if (targetm.resolve_overloaded_builtin) | |
e60a6f7b | 7333 | return targetm.resolve_overloaded_builtin (loc, function, params); |
65441f6f | 7334 | else |
a0c938f0 | 7335 | return NULL_TREE; |
65441f6f | 7336 | default: |
7337 | return NULL_TREE; | |
7338 | } | |
a0c938f0 | 7339 | |
65441f6f | 7340 | /* Handle BUILT_IN_NORMAL here. */ |
b6a5fc45 | 7341 | switch (orig_code) |
7342 | { | |
123081ef | 7343 | case BUILT_IN_SPECULATION_SAFE_VALUE_N: |
7344 | { | |
7345 | tree new_function, first_param, result; | |
7346 | enum built_in_function fncode | |
7347 | = speculation_safe_value_resolve_call (function, params);; | |
7348 | ||
7349 | first_param = (*params)[0]; | |
7350 | if (fncode == BUILT_IN_NONE | |
7351 | || !speculation_safe_value_resolve_params (loc, function, params)) | |
7352 | return error_mark_node; | |
7353 | ||
7354 | if (targetm.have_speculation_safe_value (true)) | |
7355 | { | |
7356 | new_function = builtin_decl_explicit (fncode); | |
7357 | result = build_function_call_vec (loc, vNULL, new_function, params, | |
7358 | NULL); | |
7359 | ||
7360 | if (result == error_mark_node) | |
7361 | return result; | |
7362 | ||
7363 | return speculation_safe_value_resolve_return (first_param, result); | |
7364 | } | |
7365 | else | |
7366 | { | |
7367 | /* This target doesn't have, or doesn't need, active mitigation | |
7368 | against incorrect speculative execution. Simply return the | |
7369 | first parameter to the builtin. */ | |
7370 | if (!targetm.have_speculation_safe_value (false)) | |
7371 | /* The user has invoked __builtin_speculation_safe_value | |
7372 | even though __HAVE_SPECULATION_SAFE_VALUE is not | |
7373 | defined: emit a warning. */ | |
7374 | warning_at (input_location, 0, | |
7375 | "this target does not define a speculation barrier; " | |
7376 | "your program will still execute correctly, " | |
7377 | "but incorrect speculation may not be be " | |
7378 | "restricted"); | |
7379 | ||
7380 | /* If the optional second argument is present, handle any side | |
7381 | effects now. */ | |
7382 | if (params->length () == 2 | |
7383 | && TREE_SIDE_EFFECTS ((*params)[1])) | |
7384 | return build2 (COMPOUND_EXPR, TREE_TYPE (first_param), | |
7385 | (*params)[1], first_param); | |
7386 | ||
7387 | return first_param; | |
7388 | } | |
7389 | } | |
7390 | ||
1cd6e20d | 7391 | case BUILT_IN_ATOMIC_EXCHANGE: |
7392 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
7393 | case BUILT_IN_ATOMIC_LOAD: | |
7394 | case BUILT_IN_ATOMIC_STORE: | |
7395 | { | |
7396 | /* Handle these 4 together so that they can fall through to the next | |
7397 | case if the call is transformed to an _N variant. */ | |
7398 | switch (orig_code) | |
c7afb782 | 7399 | { |
1cd6e20d | 7400 | case BUILT_IN_ATOMIC_EXCHANGE: |
7401 | { | |
7402 | if (resolve_overloaded_atomic_exchange (loc, function, params, | |
7403 | &new_return)) | |
7404 | return new_return; | |
7405 | /* Change to the _N variant. */ | |
7406 | orig_code = BUILT_IN_ATOMIC_EXCHANGE_N; | |
7407 | break; | |
7408 | } | |
7409 | ||
7410 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE: | |
7411 | { | |
7412 | if (resolve_overloaded_atomic_compare_exchange (loc, function, | |
7413 | params, | |
7414 | &new_return)) | |
7415 | return new_return; | |
7416 | /* Change to the _N variant. */ | |
7417 | orig_code = BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N; | |
7418 | break; | |
7419 | } | |
7420 | case BUILT_IN_ATOMIC_LOAD: | |
7421 | { | |
7422 | if (resolve_overloaded_atomic_load (loc, function, params, | |
7423 | &new_return)) | |
7424 | return new_return; | |
7425 | /* Change to the _N variant. */ | |
7426 | orig_code = BUILT_IN_ATOMIC_LOAD_N; | |
7427 | break; | |
7428 | } | |
7429 | case BUILT_IN_ATOMIC_STORE: | |
7430 | { | |
7431 | if (resolve_overloaded_atomic_store (loc, function, params, | |
7432 | &new_return)) | |
7433 | return new_return; | |
7434 | /* Change to the _N variant. */ | |
7435 | orig_code = BUILT_IN_ATOMIC_STORE_N; | |
7436 | break; | |
7437 | } | |
7438 | default: | |
7439 | gcc_unreachable (); | |
c7afb782 | 7440 | } |
1cd6e20d | 7441 | } |
c7afb782 | 7442 | /* FALLTHRU */ |
1cd6e20d | 7443 | case BUILT_IN_ATOMIC_EXCHANGE_N: |
7444 | case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N: | |
7445 | case BUILT_IN_ATOMIC_LOAD_N: | |
7446 | case BUILT_IN_ATOMIC_STORE_N: | |
c7afb782 | 7447 | fetch_op = false; |
7448 | /* FALLTHRU */ | |
1cd6e20d | 7449 | case BUILT_IN_ATOMIC_ADD_FETCH_N: |
7450 | case BUILT_IN_ATOMIC_SUB_FETCH_N: | |
7451 | case BUILT_IN_ATOMIC_AND_FETCH_N: | |
7452 | case BUILT_IN_ATOMIC_NAND_FETCH_N: | |
7453 | case BUILT_IN_ATOMIC_XOR_FETCH_N: | |
7454 | case BUILT_IN_ATOMIC_OR_FETCH_N: | |
7455 | case BUILT_IN_ATOMIC_FETCH_ADD_N: | |
7456 | case BUILT_IN_ATOMIC_FETCH_SUB_N: | |
7457 | case BUILT_IN_ATOMIC_FETCH_AND_N: | |
7458 | case BUILT_IN_ATOMIC_FETCH_NAND_N: | |
7459 | case BUILT_IN_ATOMIC_FETCH_XOR_N: | |
7460 | case BUILT_IN_ATOMIC_FETCH_OR_N: | |
c7afb782 | 7461 | orig_format = false; |
7462 | /* FALLTHRU */ | |
2797f13a | 7463 | case BUILT_IN_SYNC_FETCH_AND_ADD_N: |
7464 | case BUILT_IN_SYNC_FETCH_AND_SUB_N: | |
7465 | case BUILT_IN_SYNC_FETCH_AND_OR_N: | |
7466 | case BUILT_IN_SYNC_FETCH_AND_AND_N: | |
7467 | case BUILT_IN_SYNC_FETCH_AND_XOR_N: | |
7468 | case BUILT_IN_SYNC_FETCH_AND_NAND_N: | |
7469 | case BUILT_IN_SYNC_ADD_AND_FETCH_N: | |
7470 | case BUILT_IN_SYNC_SUB_AND_FETCH_N: | |
7471 | case BUILT_IN_SYNC_OR_AND_FETCH_N: | |
7472 | case BUILT_IN_SYNC_AND_AND_FETCH_N: | |
7473 | case BUILT_IN_SYNC_XOR_AND_FETCH_N: | |
7474 | case BUILT_IN_SYNC_NAND_AND_FETCH_N: | |
7475 | case BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N: | |
7476 | case BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N: | |
7477 | case BUILT_IN_SYNC_LOCK_TEST_AND_SET_N: | |
7478 | case BUILT_IN_SYNC_LOCK_RELEASE_N: | |
b6a5fc45 | 7479 | { |
517906ff | 7480 | /* The following are not _FETCH_OPs and must be accepted with |
7481 | pointers to _Bool (or C++ bool). */ | |
7482 | if (fetch_op) | |
7483 | fetch_op = | |
7484 | (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N | |
7485 | && orig_code != BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N | |
7486 | && orig_code != BUILT_IN_SYNC_LOCK_TEST_AND_SET_N | |
7487 | && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N); | |
7488 | ||
7489 | int n = sync_resolve_size (function, params, fetch_op); | |
b9c74b4d | 7490 | tree new_function, first_param, result; |
b9a16870 | 7491 | enum built_in_function fncode; |
b6a5fc45 | 7492 | |
7493 | if (n == 0) | |
7494 | return error_mark_node; | |
7495 | ||
b9a16870 | 7496 | fncode = (enum built_in_function)((int)orig_code + exact_log2 (n) + 1); |
7497 | new_function = builtin_decl_explicit (fncode); | |
1cd6e20d | 7498 | if (!sync_resolve_params (loc, function, new_function, params, |
7499 | orig_format)) | |
b6a5fc45 | 7500 | return error_mark_node; |
7501 | ||
f1f41a6c | 7502 | first_param = (*params)[0]; |
ec761d5a | 7503 | result = build_function_call_vec (loc, vNULL, new_function, params, |
7504 | NULL); | |
1cd6e20d | 7505 | if (result == error_mark_node) |
7506 | return result; | |
2797f13a | 7507 | if (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N |
1cd6e20d | 7508 | && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N |
efa8e86e | 7509 | && orig_code != BUILT_IN_ATOMIC_STORE_N |
7510 | && orig_code != BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N) | |
1cd6e20d | 7511 | result = sync_resolve_return (first_param, result, orig_format); |
b6a5fc45 | 7512 | |
92e7ab1e | 7513 | if (fetch_op) |
7514 | /* Prevent -Wunused-value warning. */ | |
7515 | TREE_USED (result) = true; | |
7516 | ||
1cd6e20d | 7517 | /* If new_return is set, assign function to that expr and cast the |
7518 | result to void since the generic interface returned void. */ | |
7519 | if (new_return) | |
7520 | { | |
7521 | /* Cast function result from I{1,2,4,8,16} to the required type. */ | |
7522 | result = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (new_return), result); | |
7523 | result = build2 (MODIFY_EXPR, TREE_TYPE (new_return), new_return, | |
7524 | result); | |
7525 | TREE_SIDE_EFFECTS (result) = 1; | |
7526 | protected_set_expr_location (result, loc); | |
7527 | result = convert (void_type_node, result); | |
7528 | } | |
b6a5fc45 | 7529 | return result; |
7530 | } | |
7531 | ||
7532 | default: | |
65441f6f | 7533 | return NULL_TREE; |
b6a5fc45 | 7534 | } |
7535 | } | |
7536 | ||
73437615 | 7537 | /* vector_types_compatible_elements_p is used in type checks of vectors |
7538 | values used as operands of binary operators. Where it returns true, and | |
7539 | the other checks of the caller succeed (being vector types in he first | |
7540 | place, and matching number of elements), we can just treat the types | |
7541 | as essentially the same. | |
7542 | Contrast with vector_targets_convertible_p, which is used for vector | |
7543 | pointer types, and vector_types_convertible_p, which will allow | |
7544 | language-specific matches under the control of flag_lax_vector_conversions, | |
7545 | and might still require a conversion. */ | |
7546 | /* True if vector types T1 and T2 can be inputs to the same binary | |
7547 | operator without conversion. | |
7548 | We don't check the overall vector size here because some of our callers | |
7549 | want to give different error messages when the vectors are compatible | |
7550 | except for the element count. */ | |
7551 | ||
491255f5 | 7552 | bool |
73437615 | 7553 | vector_types_compatible_elements_p (tree t1, tree t2) |
491255f5 | 7554 | { |
73437615 | 7555 | bool opaque = TYPE_VECTOR_OPAQUE (t1) || TYPE_VECTOR_OPAQUE (t2); |
7556 | t1 = TREE_TYPE (t1); | |
7557 | t2 = TREE_TYPE (t2); | |
7558 | ||
491255f5 | 7559 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); |
7560 | ||
d32a4fbd | 7561 | gcc_assert ((INTEGRAL_TYPE_P (t1) |
7562 | || c1 == REAL_TYPE | |
7563 | || c1 == FIXED_POINT_TYPE) | |
7564 | && (INTEGRAL_TYPE_P (t2) | |
7565 | || c2 == REAL_TYPE | |
9421ebb9 | 7566 | || c2 == FIXED_POINT_TYPE)); |
491255f5 | 7567 | |
73437615 | 7568 | t1 = c_common_signed_type (t1); |
7569 | t2 = c_common_signed_type (t2); | |
491255f5 | 7570 | /* Equality works here because c_common_signed_type uses |
7571 | TYPE_MAIN_VARIANT. */ | |
73437615 | 7572 | if (t1 == t2) |
7573 | return true; | |
7574 | if (opaque && c1 == c2 | |
d32a4fbd | 7575 | && (INTEGRAL_TYPE_P (t1) || c1 == REAL_TYPE) |
73437615 | 7576 | && TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) |
7577 | return true; | |
7578 | return false; | |
491255f5 | 7579 | } |
7580 | ||
be7350e7 | 7581 | /* Check for missing format attributes on function pointers. LTYPE is |
7582 | the new type or left-hand side type. RTYPE is the old type or | |
7583 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
7584 | attribute. */ | |
7585 | ||
7586 | bool | |
7587 | check_missing_format_attribute (tree ltype, tree rtype) | |
7588 | { | |
7589 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
7590 | tree ra; | |
7591 | ||
7592 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
7593 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
7594 | break; | |
7595 | if (ra) | |
7596 | { | |
7597 | tree la; | |
7598 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
7599 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
7600 | break; | |
7601 | return !la; | |
7602 | } | |
7603 | else | |
7604 | return false; | |
7605 | } | |
7606 | ||
41771881 | 7607 | /* Setup a TYPE_DECL node as a typedef representation. |
7608 | ||
7609 | X is a TYPE_DECL for a typedef statement. Create a brand new | |
7610 | ..._TYPE node (which will be just a variant of the existing | |
7611 | ..._TYPE node with identical properties) and then install X | |
7612 | as the TYPE_NAME of this brand new (duplicate) ..._TYPE node. | |
7613 | ||
7614 | The whole point here is to end up with a situation where each | |
7615 | and every ..._TYPE node the compiler creates will be uniquely | |
7616 | associated with AT MOST one node representing a typedef name. | |
7617 | This way, even though the compiler substitutes corresponding | |
7618 | ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very | |
7619 | early on, later parts of the compiler can always do the reverse | |
7620 | translation and get back the corresponding typedef name. For | |
7621 | example, given: | |
ab2c1de8 | 7622 | |
41771881 | 7623 | typedef struct S MY_TYPE; |
7624 | MY_TYPE object; | |
7625 | ||
7626 | Later parts of the compiler might only know that `object' was of | |
7627 | type `struct S' if it were not for code just below. With this | |
7628 | code however, later parts of the compiler see something like: | |
7629 | ||
7630 | struct S' == struct S | |
7631 | typedef struct S' MY_TYPE; | |
7632 | struct S' object; | |
7633 | ||
7634 | And they can then deduce (from the node for type struct S') that | |
7635 | the original object declaration was: | |
7636 | ||
7637 | MY_TYPE object; | |
7638 | ||
7639 | Being able to do this is important for proper support of protoize, | |
7640 | and also for generating precise symbolic debugging information | |
7641 | which takes full account of the programmer's (typedef) vocabulary. | |
7642 | ||
7643 | Obviously, we don't want to generate a duplicate ..._TYPE node if | |
7644 | the TYPE_DECL node that we are now processing really represents a | |
7645 | standard built-in type. */ | |
7646 | ||
7647 | void | |
7648 | set_underlying_type (tree x) | |
7649 | { | |
7650 | if (x == error_mark_node) | |
7651 | return; | |
2c24fd5e | 7652 | if (DECL_IS_BUILTIN (x) && TREE_CODE (TREE_TYPE (x)) != ARRAY_TYPE) |
41771881 | 7653 | { |
7654 | if (TYPE_NAME (TREE_TYPE (x)) == 0) | |
7655 | TYPE_NAME (TREE_TYPE (x)) = x; | |
7656 | } | |
ba5a0dd7 | 7657 | else if (TREE_TYPE (x) != error_mark_node |
7658 | && DECL_ORIGINAL_TYPE (x) == NULL_TREE) | |
41771881 | 7659 | { |
7660 | tree tt = TREE_TYPE (x); | |
7661 | DECL_ORIGINAL_TYPE (x) = tt; | |
ba5a0dd7 | 7662 | tt = build_variant_type_copy (tt); |
7663 | TYPE_STUB_DECL (tt) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x)); | |
7664 | TYPE_NAME (tt) = x; | |
da7a26fc | 7665 | |
7666 | /* Mark the type as used only when its type decl is decorated | |
7667 | with attribute unused. */ | |
7668 | if (lookup_attribute ("unused", DECL_ATTRIBUTES (x))) | |
7669 | TREE_USED (tt) = 1; | |
7670 | ||
ba5a0dd7 | 7671 | TREE_TYPE (x) = tt; |
41771881 | 7672 | } |
7673 | } | |
7674 | ||
1a4c44c5 | 7675 | /* Record the types used by the current global variable declaration |
7676 | being parsed, so that we can decide later to emit their debug info. | |
7677 | Those types are in types_used_by_cur_var_decl, and we are going to | |
7678 | store them in the types_used_by_vars_hash hash table. | |
7679 | DECL is the declaration of the global variable that has been parsed. */ | |
7680 | ||
7681 | void | |
7682 | record_types_used_by_current_var_decl (tree decl) | |
7683 | { | |
7684 | gcc_assert (decl && DECL_P (decl) && TREE_STATIC (decl)); | |
7685 | ||
f1f41a6c | 7686 | while (types_used_by_cur_var_decl && !types_used_by_cur_var_decl->is_empty ()) |
1a4c44c5 | 7687 | { |
f1f41a6c | 7688 | tree type = types_used_by_cur_var_decl->pop (); |
aef48c9a | 7689 | types_used_by_var_decl_insert (type, decl); |
1a4c44c5 | 7690 | } |
7691 | } | |
7692 | ||
f352a3fb | 7693 | /* The C and C++ parsers both use vectors to hold function arguments. |
7694 | For efficiency, we keep a cache of unused vectors. This is the | |
7695 | cache. */ | |
7696 | ||
f1f41a6c | 7697 | typedef vec<tree, va_gc> *tree_gc_vec; |
7698 | static GTY((deletable)) vec<tree_gc_vec, va_gc> *tree_vector_cache; | |
f352a3fb | 7699 | |
7700 | /* Return a new vector from the cache. If the cache is empty, | |
7701 | allocate a new vector. These vectors are GC'ed, so it is OK if the | |
7702 | pointer is not released.. */ | |
7703 | ||
f1f41a6c | 7704 | vec<tree, va_gc> * |
f352a3fb | 7705 | make_tree_vector (void) |
7706 | { | |
f1f41a6c | 7707 | if (tree_vector_cache && !tree_vector_cache->is_empty ()) |
7708 | return tree_vector_cache->pop (); | |
f352a3fb | 7709 | else |
7710 | { | |
f1f41a6c | 7711 | /* Passing 0 to vec::alloc returns NULL, and our callers require |
f352a3fb | 7712 | that we always return a non-NULL value. The vector code uses |
7713 | 4 when growing a NULL vector, so we do too. */ | |
f1f41a6c | 7714 | vec<tree, va_gc> *v; |
7715 | vec_alloc (v, 4); | |
7716 | return v; | |
f352a3fb | 7717 | } |
7718 | } | |
7719 | ||
7720 | /* Release a vector of trees back to the cache. */ | |
7721 | ||
7722 | void | |
f1f41a6c | 7723 | release_tree_vector (vec<tree, va_gc> *vec) |
f352a3fb | 7724 | { |
7725 | if (vec != NULL) | |
7726 | { | |
f1f41a6c | 7727 | vec->truncate (0); |
7728 | vec_safe_push (tree_vector_cache, vec); | |
f352a3fb | 7729 | } |
7730 | } | |
7731 | ||
7732 | /* Get a new tree vector holding a single tree. */ | |
7733 | ||
f1f41a6c | 7734 | vec<tree, va_gc> * |
f352a3fb | 7735 | make_tree_vector_single (tree t) |
7736 | { | |
f1f41a6c | 7737 | vec<tree, va_gc> *ret = make_tree_vector (); |
7738 | ret->quick_push (t); | |
f352a3fb | 7739 | return ret; |
7740 | } | |
7741 | ||
c66c81be | 7742 | /* Get a new tree vector of the TREE_VALUEs of a TREE_LIST chain. */ |
7743 | ||
f1f41a6c | 7744 | vec<tree, va_gc> * |
c66c81be | 7745 | make_tree_vector_from_list (tree list) |
7746 | { | |
f1f41a6c | 7747 | vec<tree, va_gc> *ret = make_tree_vector (); |
c66c81be | 7748 | for (; list; list = TREE_CHAIN (list)) |
f1f41a6c | 7749 | vec_safe_push (ret, TREE_VALUE (list)); |
c66c81be | 7750 | return ret; |
7751 | } | |
7752 | ||
492ab670 | 7753 | /* Get a new tree vector of the values of a CONSTRUCTOR. */ |
7754 | ||
7755 | vec<tree, va_gc> * | |
7756 | make_tree_vector_from_ctor (tree ctor) | |
7757 | { | |
7758 | vec<tree,va_gc> *ret = make_tree_vector (); | |
7759 | vec_safe_reserve (ret, CONSTRUCTOR_NELTS (ctor)); | |
7760 | for (unsigned i = 0; i < CONSTRUCTOR_NELTS (ctor); ++i) | |
7761 | ret->quick_push (CONSTRUCTOR_ELT (ctor, i)->value); | |
7762 | return ret; | |
7763 | } | |
7764 | ||
f352a3fb | 7765 | /* Get a new tree vector which is a copy of an existing one. */ |
7766 | ||
f1f41a6c | 7767 | vec<tree, va_gc> * |
7768 | make_tree_vector_copy (const vec<tree, va_gc> *orig) | |
f352a3fb | 7769 | { |
f1f41a6c | 7770 | vec<tree, va_gc> *ret; |
f352a3fb | 7771 | unsigned int ix; |
7772 | tree t; | |
7773 | ||
7774 | ret = make_tree_vector (); | |
f1f41a6c | 7775 | vec_safe_reserve (ret, vec_safe_length (orig)); |
7776 | FOR_EACH_VEC_SAFE_ELT (orig, ix, t) | |
7777 | ret->quick_push (t); | |
f352a3fb | 7778 | return ret; |
7779 | } | |
7780 | ||
a9ffdd35 | 7781 | /* Return true if KEYWORD starts a type specifier. */ |
7782 | ||
7783 | bool | |
7784 | keyword_begins_type_specifier (enum rid keyword) | |
7785 | { | |
7786 | switch (keyword) | |
7787 | { | |
4fba5eb9 | 7788 | case RID_AUTO_TYPE: |
a9ffdd35 | 7789 | case RID_INT: |
7790 | case RID_CHAR: | |
7791 | case RID_FLOAT: | |
7792 | case RID_DOUBLE: | |
7793 | case RID_VOID: | |
a9ffdd35 | 7794 | case RID_UNSIGNED: |
7795 | case RID_LONG: | |
7796 | case RID_SHORT: | |
7797 | case RID_SIGNED: | |
82c85aba | 7798 | CASE_RID_FLOATN_NX: |
a9ffdd35 | 7799 | case RID_DFLOAT32: |
7800 | case RID_DFLOAT64: | |
7801 | case RID_DFLOAT128: | |
7802 | case RID_FRACT: | |
7803 | case RID_ACCUM: | |
7804 | case RID_BOOL: | |
7805 | case RID_WCHAR: | |
82362779 | 7806 | case RID_CHAR8: |
a9ffdd35 | 7807 | case RID_CHAR16: |
7808 | case RID_CHAR32: | |
7809 | case RID_SAT: | |
7810 | case RID_COMPLEX: | |
7811 | case RID_TYPEOF: | |
7812 | case RID_STRUCT: | |
7813 | case RID_CLASS: | |
7814 | case RID_UNION: | |
7815 | case RID_ENUM: | |
7816 | return true; | |
7817 | default: | |
9f75f026 | 7818 | if (keyword >= RID_FIRST_INT_N |
7819 | && keyword < RID_FIRST_INT_N + NUM_INT_N_ENTS | |
7820 | && int_n_enabled_p[keyword-RID_FIRST_INT_N]) | |
7821 | return true; | |
a9ffdd35 | 7822 | return false; |
7823 | } | |
7824 | } | |
7825 | ||
7826 | /* Return true if KEYWORD names a type qualifier. */ | |
7827 | ||
7828 | bool | |
7829 | keyword_is_type_qualifier (enum rid keyword) | |
7830 | { | |
7831 | switch (keyword) | |
7832 | { | |
7833 | case RID_CONST: | |
7834 | case RID_VOLATILE: | |
7835 | case RID_RESTRICT: | |
b560fabd | 7836 | case RID_ATOMIC: |
a9ffdd35 | 7837 | return true; |
7838 | default: | |
7839 | return false; | |
7840 | } | |
7841 | } | |
7842 | ||
7843 | /* Return true if KEYWORD names a storage class specifier. | |
7844 | ||
7845 | RID_TYPEDEF is not included in this list despite `typedef' being | |
7846 | listed in C99 6.7.1.1. 6.7.1.3 indicates that `typedef' is listed as | |
7847 | such for syntactic convenience only. */ | |
7848 | ||
7849 | bool | |
7850 | keyword_is_storage_class_specifier (enum rid keyword) | |
7851 | { | |
7852 | switch (keyword) | |
7853 | { | |
7854 | case RID_STATIC: | |
7855 | case RID_EXTERN: | |
7856 | case RID_REGISTER: | |
7857 | case RID_AUTO: | |
7858 | case RID_MUTABLE: | |
7859 | case RID_THREAD: | |
7860 | return true; | |
7861 | default: | |
7862 | return false; | |
7863 | } | |
7864 | } | |
7865 | ||
fad3f658 | 7866 | /* Return true if KEYWORD names a function-specifier [dcl.fct.spec]. */ |
7867 | ||
7868 | static bool | |
7869 | keyword_is_function_specifier (enum rid keyword) | |
7870 | { | |
7871 | switch (keyword) | |
7872 | { | |
7873 | case RID_INLINE: | |
985c6e3a | 7874 | case RID_NORETURN: |
fad3f658 | 7875 | case RID_VIRTUAL: |
7876 | case RID_EXPLICIT: | |
7877 | return true; | |
7878 | default: | |
7879 | return false; | |
7880 | } | |
7881 | } | |
7882 | ||
7883 | /* Return true if KEYWORD names a decl-specifier [dcl.spec] or a | |
7884 | declaration-specifier (C99 6.7). */ | |
7885 | ||
7886 | bool | |
7887 | keyword_is_decl_specifier (enum rid keyword) | |
7888 | { | |
7889 | if (keyword_is_storage_class_specifier (keyword) | |
7890 | || keyword_is_type_qualifier (keyword) | |
7891 | || keyword_is_function_specifier (keyword)) | |
7892 | return true; | |
7893 | ||
7894 | switch (keyword) | |
7895 | { | |
7896 | case RID_TYPEDEF: | |
7897 | case RID_FRIEND: | |
7898 | case RID_CONSTEXPR: | |
7899 | return true; | |
7900 | default: | |
7901 | return false; | |
7902 | } | |
7903 | } | |
7904 | ||
9b88d08d | 7905 | /* Initialize language-specific-bits of tree_contains_struct. */ |
7906 | ||
7907 | void | |
7908 | c_common_init_ts (void) | |
7909 | { | |
7910 | MARK_TS_TYPED (C_MAYBE_CONST_EXPR); | |
7911 | MARK_TS_TYPED (EXCESS_PRECISION_EXPR); | |
7912 | } | |
7913 | ||
244db24d | 7914 | /* Build a user-defined numeric literal out of an integer constant type VALUE |
7915 | with identifier SUFFIX. */ | |
7916 | ||
7917 | tree | |
324ca377 | 7918 | build_userdef_literal (tree suffix_id, tree value, |
7919 | enum overflow_type overflow, tree num_string) | |
244db24d | 7920 | { |
7921 | tree literal = make_node (USERDEF_LITERAL); | |
7922 | USERDEF_LITERAL_SUFFIX_ID (literal) = suffix_id; | |
7923 | USERDEF_LITERAL_VALUE (literal) = value; | |
324ca377 | 7924 | USERDEF_LITERAL_OVERFLOW (literal) = overflow; |
244db24d | 7925 | USERDEF_LITERAL_NUM_STRING (literal) = num_string; |
7926 | return literal; | |
7927 | } | |
7928 | ||
7345b977 | 7929 | /* For vector[index], convert the vector to an array of the underlying type. |
7930 | Return true if the resulting ARRAY_REF should not be an lvalue. */ | |
c61ef207 | 7931 | |
7932 | bool | |
7345b977 | 7933 | convert_vector_to_array_for_subscript (location_t loc, |
7934 | tree *vecp, tree index) | |
7059d45d | 7935 | { |
c61ef207 | 7936 | bool ret = false; |
6290f0db | 7937 | if (VECTOR_TYPE_P (TREE_TYPE (*vecp))) |
7059d45d | 7938 | { |
7939 | tree type = TREE_TYPE (*vecp); | |
7059d45d | 7940 | |
c61ef207 | 7941 | ret = !lvalue_p (*vecp); |
7345b977 | 7942 | |
d582d140 | 7943 | index = fold_for_warn (index); |
7059d45d | 7944 | if (TREE_CODE (index) == INTEGER_CST) |
e913b5cd | 7945 | if (!tree_fits_uhwi_p (index) |
f08ee65f | 7946 | || maybe_ge (tree_to_uhwi (index), TYPE_VECTOR_SUBPARTS (type))) |
7059d45d | 7947 | warning_at (loc, OPT_Warray_bounds, "index value is out of bound"); |
7948 | ||
7345b977 | 7949 | /* We are building an ARRAY_REF so mark the vector as addressable |
7950 | to not run into the gimplifiers premature setting of DECL_GIMPLE_REG_P | |
7951 | for function parameters. */ | |
7952 | c_common_mark_addressable_vec (*vecp); | |
7953 | ||
7954 | *vecp = build1 (VIEW_CONVERT_EXPR, | |
7955 | build_array_type_nelts (TREE_TYPE (type), | |
7956 | TYPE_VECTOR_SUBPARTS (type)), | |
7957 | *vecp); | |
7059d45d | 7958 | } |
c61ef207 | 7959 | return ret; |
7059d45d | 7960 | } |
7961 | ||
41ed701a | 7962 | /* Determine which of the operands, if any, is a scalar that needs to be |
7963 | converted to a vector, for the range of operations. */ | |
7964 | enum stv_conv | |
7965 | scalar_to_vector (location_t loc, enum tree_code code, tree op0, tree op1, | |
7966 | bool complain) | |
7967 | { | |
7968 | tree type0 = TREE_TYPE (op0); | |
7969 | tree type1 = TREE_TYPE (op1); | |
7970 | bool integer_only_op = false; | |
7971 | enum stv_conv ret = stv_firstarg; | |
7972 | ||
6290f0db | 7973 | gcc_assert (VECTOR_TYPE_P (type0) || VECTOR_TYPE_P (type1)); |
41ed701a | 7974 | switch (code) |
7975 | { | |
7976 | /* Most GENERIC binary expressions require homogeneous arguments. | |
7977 | LSHIFT_EXPR and RSHIFT_EXPR are exceptions and accept a first | |
7978 | argument that is a vector and a second one that is a scalar, so | |
7979 | we never return stv_secondarg for them. */ | |
7980 | case RSHIFT_EXPR: | |
7981 | case LSHIFT_EXPR: | |
7982 | if (TREE_CODE (type0) == INTEGER_TYPE | |
7983 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
7984 | { | |
645b0f8d | 7985 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, |
7986 | NULL_TREE, false)) | |
41ed701a | 7987 | { |
7988 | if (complain) | |
7989 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
7990 | "involves truncation", type0, type1); | |
7991 | return stv_error; | |
7992 | } | |
7993 | else | |
7994 | return stv_firstarg; | |
7995 | } | |
7996 | break; | |
7997 | ||
7998 | case BIT_IOR_EXPR: | |
7999 | case BIT_XOR_EXPR: | |
8000 | case BIT_AND_EXPR: | |
8001 | integer_only_op = true; | |
e3533433 | 8002 | /* fall through */ |
41ed701a | 8003 | |
7b463b19 | 8004 | case VEC_COND_EXPR: |
8005 | ||
41ed701a | 8006 | case PLUS_EXPR: |
8007 | case MINUS_EXPR: | |
8008 | case MULT_EXPR: | |
8009 | case TRUNC_DIV_EXPR: | |
8010 | case CEIL_DIV_EXPR: | |
8011 | case FLOOR_DIV_EXPR: | |
8012 | case ROUND_DIV_EXPR: | |
8013 | case EXACT_DIV_EXPR: | |
8014 | case TRUNC_MOD_EXPR: | |
8015 | case FLOOR_MOD_EXPR: | |
8016 | case RDIV_EXPR: | |
8017 | case EQ_EXPR: | |
8018 | case NE_EXPR: | |
8019 | case LE_EXPR: | |
8020 | case GE_EXPR: | |
8021 | case LT_EXPR: | |
8022 | case GT_EXPR: | |
8023 | /* What about UNLT_EXPR? */ | |
6290f0db | 8024 | if (VECTOR_TYPE_P (type0)) |
41ed701a | 8025 | { |
41ed701a | 8026 | ret = stv_secondarg; |
a4f59596 | 8027 | std::swap (type0, type1); |
8028 | std::swap (op0, op1); | |
41ed701a | 8029 | } |
8030 | ||
8031 | if (TREE_CODE (type0) == INTEGER_TYPE | |
8032 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
8033 | { | |
645b0f8d | 8034 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, |
8035 | NULL_TREE, false)) | |
41ed701a | 8036 | { |
8037 | if (complain) | |
8038 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
8039 | "involves truncation", type0, type1); | |
8040 | return stv_error; | |
8041 | } | |
8042 | return ret; | |
8043 | } | |
8044 | else if (!integer_only_op | |
8045 | /* Allow integer --> real conversion if safe. */ | |
8046 | && (TREE_CODE (type0) == REAL_TYPE | |
8047 | || TREE_CODE (type0) == INTEGER_TYPE) | |
8048 | && SCALAR_FLOAT_TYPE_P (TREE_TYPE (type1))) | |
8049 | { | |
645b0f8d | 8050 | if (unsafe_conversion_p (loc, TREE_TYPE (type1), op0, |
8051 | NULL_TREE, false)) | |
41ed701a | 8052 | { |
8053 | if (complain) | |
8054 | error_at (loc, "conversion of scalar %qT to vector %qT " | |
8055 | "involves truncation", type0, type1); | |
8056 | return stv_error; | |
8057 | } | |
8058 | return ret; | |
8059 | } | |
8060 | default: | |
8061 | break; | |
8062 | } | |
8063 | ||
8064 | return stv_nothing; | |
8065 | } | |
8066 | ||
db8ffb40 | 8067 | /* Return the alignment of std::max_align_t. |
8068 | ||
8069 | [support.types.layout] The type max_align_t is a POD type whose alignment | |
8070 | requirement is at least as great as that of every scalar type, and whose | |
8071 | alignment requirement is supported in every context. */ | |
8072 | ||
8073 | unsigned | |
8074 | max_align_t_align () | |
8075 | { | |
9b5c49ef | 8076 | unsigned int max_align = MAX (TYPE_ALIGN (long_long_integer_type_node), |
8077 | TYPE_ALIGN (long_double_type_node)); | |
8078 | if (float128_type_node != NULL_TREE) | |
8079 | max_align = MAX (max_align, TYPE_ALIGN (float128_type_node)); | |
8080 | return max_align; | |
db8ffb40 | 8081 | } |
8082 | ||
ffcdbf9c | 8083 | /* Return true iff ALIGN is an integral constant that is a fundamental |
8084 | alignment, as defined by [basic.align] in the c++-11 | |
8085 | specifications. | |
8086 | ||
8087 | That is: | |
8088 | ||
8089 | [A fundamental alignment is represented by an alignment less than or | |
8090 | equal to the greatest alignment supported by the implementation | |
db8ffb40 | 8091 | in all contexts, which is equal to alignof(max_align_t)]. */ |
ffcdbf9c | 8092 | |
8093 | bool | |
db8ffb40 | 8094 | cxx_fundamental_alignment_p (unsigned align) |
ffcdbf9c | 8095 | { |
db8ffb40 | 8096 | return (align <= max_align_t_align ()); |
ffcdbf9c | 8097 | } |
8098 | ||
46da3601 | 8099 | /* Return true if T is a pointer to a zero-sized aggregate. */ |
8100 | ||
8101 | bool | |
8102 | pointer_to_zero_sized_aggr_p (tree t) | |
8103 | { | |
8104 | if (!POINTER_TYPE_P (t)) | |
8105 | return false; | |
8106 | t = TREE_TYPE (t); | |
8107 | return (TYPE_SIZE (t) && integer_zerop (TYPE_SIZE (t))); | |
8108 | } | |
8109 | ||
547c6b1f | 8110 | /* For an EXPR of a FUNCTION_TYPE that references a GCC built-in function |
8111 | with no library fallback or for an ADDR_EXPR whose operand is such type | |
8112 | issues an error pointing to the location LOC. | |
8113 | Returns true when the expression has been diagnosed and false | |
8114 | otherwise. */ | |
0f4cea33 | 8115 | |
547c6b1f | 8116 | bool |
8117 | reject_gcc_builtin (const_tree expr, location_t loc /* = UNKNOWN_LOCATION */) | |
8118 | { | |
8119 | if (TREE_CODE (expr) == ADDR_EXPR) | |
8120 | expr = TREE_OPERAND (expr, 0); | |
8121 | ||
d76863c8 | 8122 | STRIP_ANY_LOCATION_WRAPPER (expr); |
8123 | ||
547c6b1f | 8124 | if (TREE_TYPE (expr) |
8125 | && TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE | |
12cc1225 | 8126 | && TREE_CODE (expr) == FUNCTION_DECL |
547c6b1f | 8127 | /* The intersection of DECL_BUILT_IN and DECL_IS_BUILTIN avoids |
8128 | false positives for user-declared built-ins such as abs or | |
8129 | strlen, and for C++ operators new and delete. | |
8130 | The c_decl_implicit() test avoids false positives for implicitly | |
8131 | declared built-ins with library fallbacks (such as abs). */ | |
a0e9bfbb | 8132 | && fndecl_built_in_p (expr) |
547c6b1f | 8133 | && DECL_IS_BUILTIN (expr) |
8134 | && !c_decl_implicit (expr) | |
8135 | && !DECL_ASSEMBLER_NAME_SET_P (expr)) | |
8136 | { | |
8137 | if (loc == UNKNOWN_LOCATION) | |
8138 | loc = EXPR_LOC_OR_LOC (expr, input_location); | |
8139 | ||
8140 | /* Reject arguments that are built-in functions with | |
8141 | no library fallback. */ | |
8142 | error_at (loc, "built-in function %qE must be directly called", expr); | |
8143 | ||
8144 | return true; | |
8145 | } | |
8146 | ||
8147 | return false; | |
8148 | } | |
8149 | ||
08acf739 | 8150 | /* Issue an ERROR for an invalid SIZE of array NAME which is null |
8151 | for unnamed arrays. */ | |
8152 | ||
8153 | void | |
8154 | invalid_array_size_error (location_t loc, cst_size_error error, | |
8155 | const_tree size, const_tree name) | |
8156 | { | |
8157 | tree maxsize = max_object_size (); | |
8158 | switch (error) | |
8159 | { | |
ec425a89 | 8160 | case cst_size_not_constant: |
8161 | if (name) | |
8162 | error_at (loc, "size of array %qE is not a constant expression", | |
8163 | name); | |
8164 | else | |
8165 | error_at (loc, "size of array is not a constant expression"); | |
8166 | break; | |
08acf739 | 8167 | case cst_size_negative: |
8168 | if (name) | |
8169 | error_at (loc, "size %qE of array %qE is negative", | |
8170 | size, name); | |
8171 | else | |
8172 | error_at (loc, "size %qE of array is negative", | |
8173 | size); | |
8174 | break; | |
8175 | case cst_size_too_big: | |
8176 | if (name) | |
8177 | error_at (loc, "size %qE of array %qE exceeds maximum " | |
8178 | "object size %qE", size, name, maxsize); | |
8179 | else | |
8180 | error_at (loc, "size %qE of array exceeds maximum " | |
8181 | "object size %qE", size, maxsize); | |
8182 | break; | |
8183 | case cst_size_overflow: | |
8184 | if (name) | |
8185 | error_at (loc, "size of array %qE exceeds maximum " | |
8186 | "object size %qE", name, maxsize); | |
8187 | else | |
8188 | error_at (loc, "size of array exceeds maximum " | |
8189 | "object size %qE", maxsize); | |
8190 | break; | |
8191 | default: | |
8192 | gcc_unreachable (); | |
8193 | } | |
8194 | } | |
8195 | ||
81b1b2a8 | 8196 | /* Check if array size calculations overflow or if the array covers more |
8197 | than half of the address space. Return true if the size of the array | |
08acf739 | 8198 | is valid, false otherwise. T is either the type of the array or its |
8199 | size, and NAME is the name of the array, or null for unnamed arrays. */ | |
81b1b2a8 | 8200 | |
8201 | bool | |
08acf739 | 8202 | valid_array_size_p (location_t loc, const_tree t, tree name, bool complain) |
81b1b2a8 | 8203 | { |
08acf739 | 8204 | if (t == error_mark_node) |
8205 | return true; | |
8206 | ||
8207 | const_tree size; | |
8208 | if (TYPE_P (t)) | |
81b1b2a8 | 8209 | { |
08acf739 | 8210 | if (!COMPLETE_TYPE_P (t)) |
8211 | return true; | |
8212 | size = TYPE_SIZE_UNIT (t); | |
81b1b2a8 | 8213 | } |
08acf739 | 8214 | else |
8215 | size = t; | |
8216 | ||
8217 | if (TREE_CODE (size) != INTEGER_CST) | |
8218 | return true; | |
8219 | ||
8220 | cst_size_error error; | |
8221 | if (valid_constant_size_p (size, &error)) | |
8222 | return true; | |
8223 | ||
8224 | if (!complain) | |
8225 | return false; | |
8226 | ||
8227 | if (TREE_CODE (TREE_TYPE (size)) == ENUMERAL_TYPE) | |
8228 | /* Show the value of the enumerator rather than its name. */ | |
8229 | size = convert (ssizetype, const_cast<tree> (size)); | |
8230 | ||
8231 | invalid_array_size_error (loc, error, size, name); | |
8232 | return false; | |
81b1b2a8 | 8233 | } |
8234 | ||
e3e8c48c | 8235 | /* Read SOURCE_DATE_EPOCH from environment to have a deterministic |
8236 | timestamp to replace embedded current dates to get reproducible | |
8237 | results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ | |
dfa5c0d3 | 8238 | |
e3e8c48c | 8239 | time_t |
dfa5c0d3 | 8240 | cb_get_source_date_epoch (cpp_reader *pfile ATTRIBUTE_UNUSED) |
e3e8c48c | 8241 | { |
8242 | char *source_date_epoch; | |
bd08c370 | 8243 | int64_t epoch; |
e3e8c48c | 8244 | char *endptr; |
8245 | ||
8246 | source_date_epoch = getenv ("SOURCE_DATE_EPOCH"); | |
8247 | if (!source_date_epoch) | |
8248 | return (time_t) -1; | |
8249 | ||
8250 | errno = 0; | |
bd08c370 | 8251 | #if defined(INT64_T_IS_LONG) |
8252 | epoch = strtol (source_date_epoch, &endptr, 10); | |
8253 | #else | |
e3e8c48c | 8254 | epoch = strtoll (source_date_epoch, &endptr, 10); |
bd08c370 | 8255 | #endif |
dfa5c0d3 | 8256 | if (errno != 0 || endptr == source_date_epoch || *endptr != '\0' |
8257 | || epoch < 0 || epoch > MAX_SOURCE_DATE_EPOCH) | |
8258 | { | |
8259 | error_at (input_location, "environment variable SOURCE_DATE_EPOCH must " | |
8260 | "expand to a non-negative integer less than or equal to %wd", | |
8261 | MAX_SOURCE_DATE_EPOCH); | |
8262 | return (time_t) -1; | |
8263 | } | |
e3e8c48c | 8264 | |
8265 | return (time_t) epoch; | |
8266 | } | |
8267 | ||
5c8151fa | 8268 | /* Callback for libcpp for offering spelling suggestions for misspelled |
8269 | directives. GOAL is an unrecognized string; CANDIDATES is a | |
8270 | NULL-terminated array of candidate strings. Return the closest | |
8271 | match to GOAL within CANDIDATES, or NULL if none are good | |
8272 | suggestions. */ | |
8273 | ||
8274 | const char * | |
8275 | cb_get_suggestion (cpp_reader *, const char *goal, | |
8276 | const char *const *candidates) | |
8277 | { | |
8278 | best_match<const char *, const char *> bm (goal); | |
8279 | while (*candidates) | |
8280 | bm.consider (*candidates++); | |
8281 | return bm.get_best_meaningful_candidate (); | |
8282 | } | |
8283 | ||
c39beb8a | 8284 | /* Return the latice point which is the wider of the two FLT_EVAL_METHOD |
8285 | modes X, Y. This isn't just >, as the FLT_EVAL_METHOD values added | |
8286 | by C TS 18661-3 for interchange types that are computed in their | |
8287 | native precision are larger than the C11 values for evaluating in the | |
8288 | precision of float/double/long double. If either mode is | |
8289 | FLT_EVAL_METHOD_UNPREDICTABLE, return that. */ | |
8290 | ||
8291 | enum flt_eval_method | |
8292 | excess_precision_mode_join (enum flt_eval_method x, | |
8293 | enum flt_eval_method y) | |
8294 | { | |
8295 | if (x == FLT_EVAL_METHOD_UNPREDICTABLE | |
8296 | || y == FLT_EVAL_METHOD_UNPREDICTABLE) | |
8297 | return FLT_EVAL_METHOD_UNPREDICTABLE; | |
8298 | ||
8299 | /* GCC only supports one interchange type right now, _Float16. If | |
8300 | we're evaluating _Float16 in 16-bit precision, then flt_eval_method | |
8301 | will be FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16. */ | |
8302 | if (x == FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16) | |
8303 | return y; | |
8304 | if (y == FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16) | |
8305 | return x; | |
8306 | ||
8307 | /* Other values for flt_eval_method are directly comparable, and we want | |
8308 | the maximum. */ | |
8309 | return MAX (x, y); | |
8310 | } | |
8311 | ||
8312 | /* Return the value that should be set for FLT_EVAL_METHOD in the | |
8313 | context of ISO/IEC TS 18861-3. | |
8314 | ||
8315 | This relates to the effective excess precision seen by the user, | |
8316 | which is the join point of the precision the target requests for | |
8317 | -fexcess-precision={standard,fast} and the implicit excess precision | |
8318 | the target uses. */ | |
8319 | ||
8320 | static enum flt_eval_method | |
8321 | c_ts18661_flt_eval_method (void) | |
8322 | { | |
8323 | enum flt_eval_method implicit | |
8324 | = targetm.c.excess_precision (EXCESS_PRECISION_TYPE_IMPLICIT); | |
8325 | ||
8326 | enum excess_precision_type flag_type | |
8327 | = (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD | |
8328 | ? EXCESS_PRECISION_TYPE_STANDARD | |
8329 | : EXCESS_PRECISION_TYPE_FAST); | |
8330 | ||
8331 | enum flt_eval_method requested | |
8332 | = targetm.c.excess_precision (flag_type); | |
8333 | ||
8334 | return excess_precision_mode_join (implicit, requested); | |
8335 | } | |
8336 | ||
8337 | /* As c_cpp_ts18661_flt_eval_method, but clamps the expected values to | |
8338 | those that were permitted by C11. That is to say, eliminates | |
8339 | FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16. */ | |
8340 | ||
8341 | static enum flt_eval_method | |
8342 | c_c11_flt_eval_method (void) | |
8343 | { | |
8344 | return excess_precision_mode_join (c_ts18661_flt_eval_method (), | |
8345 | FLT_EVAL_METHOD_PROMOTE_TO_FLOAT); | |
8346 | } | |
8347 | ||
8348 | /* Return the value that should be set for FLT_EVAL_METHOD. | |
8349 | MAYBE_C11_ONLY_P is TRUE if we should check | |
8350 | FLAG_PERMITTED_EVAL_METHODS as to whether we should limit the possible | |
8351 | values we can return to those from C99/C11, and FALSE otherwise. | |
8352 | See the comments on c_ts18661_flt_eval_method for what value we choose | |
8353 | to set here. */ | |
8354 | ||
8355 | int | |
8356 | c_flt_eval_method (bool maybe_c11_only_p) | |
8357 | { | |
8358 | if (maybe_c11_only_p | |
8359 | && flag_permitted_flt_eval_methods | |
8360 | == PERMITTED_FLT_EVAL_METHODS_C11) | |
8361 | return c_c11_flt_eval_method (); | |
8362 | else | |
8363 | return c_ts18661_flt_eval_method (); | |
8364 | } | |
8365 | ||
74578794 | 8366 | /* An enum for get_missing_token_insertion_kind for describing the best |
8367 | place to insert a missing token, if there is one. */ | |
8368 | ||
8369 | enum missing_token_insertion_kind | |
8370 | { | |
8371 | MTIK_IMPOSSIBLE, | |
8372 | MTIK_INSERT_BEFORE_NEXT, | |
8373 | MTIK_INSERT_AFTER_PREV | |
8374 | }; | |
8375 | ||
8376 | /* Given a missing token of TYPE, determine if it is reasonable to | |
8377 | emit a fix-it hint suggesting the insertion of the token, and, | |
8378 | if so, where the token should be inserted relative to other tokens. | |
8379 | ||
8380 | It only makes sense to do this for values of TYPE that are symbols. | |
8381 | ||
8382 | Some symbols should go before the next token, e.g. in: | |
8383 | if flag) | |
8384 | we want to insert the missing '(' immediately before "flag", | |
8385 | giving: | |
8386 | if (flag) | |
8387 | rather than: | |
8388 | if( flag) | |
8389 | These use MTIK_INSERT_BEFORE_NEXT. | |
8390 | ||
8391 | Other symbols should go after the previous token, e.g. in: | |
8392 | if (flag | |
8393 | do_something (); | |
8394 | we want to insert the missing ')' immediately after the "flag", | |
8395 | giving: | |
8396 | if (flag) | |
8397 | do_something (); | |
8398 | rather than: | |
8399 | if (flag | |
8400 | )do_something (); | |
8401 | These use MTIK_INSERT_AFTER_PREV. */ | |
8402 | ||
8403 | static enum missing_token_insertion_kind | |
8404 | get_missing_token_insertion_kind (enum cpp_ttype type) | |
8405 | { | |
8406 | switch (type) | |
8407 | { | |
8408 | /* Insert missing "opening" brackets immediately | |
8409 | before the next token. */ | |
8410 | case CPP_OPEN_SQUARE: | |
8411 | case CPP_OPEN_PAREN: | |
8412 | return MTIK_INSERT_BEFORE_NEXT; | |
8413 | ||
8414 | /* Insert other missing symbols immediately after | |
8415 | the previous token. */ | |
8416 | case CPP_CLOSE_PAREN: | |
8417 | case CPP_CLOSE_SQUARE: | |
8418 | case CPP_SEMICOLON: | |
8419 | case CPP_COMMA: | |
8420 | case CPP_COLON: | |
8421 | return MTIK_INSERT_AFTER_PREV; | |
8422 | ||
8423 | /* Other kinds of token don't get fix-it hints. */ | |
8424 | default: | |
8425 | return MTIK_IMPOSSIBLE; | |
8426 | } | |
8427 | } | |
8428 | ||
8429 | /* Given RICHLOC, a location for a diagnostic describing a missing token | |
8430 | of kind TOKEN_TYPE, potentially add a fix-it hint suggesting the | |
8431 | insertion of the token. | |
8432 | ||
8433 | The location of the attempted fix-it hint depends on TOKEN_TYPE: | |
8434 | it will either be: | |
8435 | (a) immediately after PREV_TOKEN_LOC, or | |
8436 | ||
8437 | (b) immediately before the primary location within RICHLOC (taken to | |
8438 | be that of the token following where the token was expected). | |
8439 | ||
8440 | If we manage to add a fix-it hint, then the location of the | |
8441 | fix-it hint is likely to be more useful as the primary location | |
8442 | of the diagnostic than that of the following token, so we swap | |
8443 | these locations. | |
8444 | ||
8445 | For example, given this bogus code: | |
8446 | 123456789012345678901234567890 | |
8447 | 1 | int missing_semicolon (void) | |
8448 | 2 | { | |
8449 | 3 | return 42 | |
8450 | 4 | } | |
8451 | ||
8452 | we will emit: | |
8453 | ||
8454 | "expected ';' before '}'" | |
8455 | ||
8456 | RICHLOC's primary location is at the closing brace, so before "swapping" | |
8457 | we would emit the error at line 4 column 1: | |
8458 | ||
8459 | 123456789012345678901234567890 | |
8460 | 3 | return 42 |< fix-it hint emitted for this line | |
8461 | | ; | | |
8462 | 4 | } |< "expected ';' before '}'" emitted at this line | |
8463 | | ^ | | |
8464 | ||
8465 | It's more useful for the location of the diagnostic to be at the | |
8466 | fix-it hint, so we swap the locations, so the primary location | |
8467 | is at the fix-it hint, with the old primary location inserted | |
8468 | as a secondary location, giving this, with the error at line 3 | |
8469 | column 12: | |
8470 | ||
8471 | 123456789012345678901234567890 | |
8472 | 3 | return 42 |< "expected ';' before '}'" emitted at this line, | |
8473 | | ^ | with fix-it hint | |
8474 | 4 | ; | | |
8475 | | } |< secondary range emitted here | |
8476 | | ~ |. */ | |
8477 | ||
8478 | void | |
8479 | maybe_suggest_missing_token_insertion (rich_location *richloc, | |
8480 | enum cpp_ttype token_type, | |
8481 | location_t prev_token_loc) | |
8482 | { | |
8483 | gcc_assert (richloc); | |
8484 | ||
8485 | enum missing_token_insertion_kind mtik | |
8486 | = get_missing_token_insertion_kind (token_type); | |
8487 | ||
8488 | switch (mtik) | |
8489 | { | |
8490 | default: | |
8491 | gcc_unreachable (); | |
8492 | break; | |
8493 | ||
8494 | case MTIK_IMPOSSIBLE: | |
8495 | return; | |
8496 | ||
8497 | case MTIK_INSERT_BEFORE_NEXT: | |
8498 | /* Attempt to add the fix-it hint before the primary location | |
8499 | of RICHLOC. */ | |
8500 | richloc->add_fixit_insert_before (cpp_type2name (token_type, 0)); | |
8501 | break; | |
8502 | ||
8503 | case MTIK_INSERT_AFTER_PREV: | |
8504 | /* Attempt to add the fix-it hint after PREV_TOKEN_LOC. */ | |
8505 | richloc->add_fixit_insert_after (prev_token_loc, | |
8506 | cpp_type2name (token_type, 0)); | |
8507 | break; | |
8508 | } | |
8509 | ||
8510 | /* If we were successful, use the fix-it hint's location as the | |
8511 | primary location within RICHLOC, adding the old primary location | |
8512 | back as a secondary location. */ | |
8513 | if (!richloc->seen_impossible_fixit_p ()) | |
8514 | { | |
8515 | fixit_hint *hint = richloc->get_last_fixit_hint (); | |
8516 | location_t hint_loc = hint->get_start_loc (); | |
8517 | location_t old_loc = richloc->get_loc (); | |
8518 | ||
5fe20025 | 8519 | richloc->set_range (0, hint_loc, SHOW_RANGE_WITH_CARET); |
8520 | richloc->add_range (old_loc); | |
74578794 | 8521 | } |
8522 | } | |
8523 | ||
7051d239 | 8524 | #if CHECKING_P |
8525 | ||
8526 | namespace selftest { | |
8527 | ||
d76863c8 | 8528 | /* Verify that fold_for_warn on error_mark_node is safe. */ |
8529 | ||
8530 | static void | |
8531 | test_fold_for_warn () | |
8532 | { | |
8533 | ASSERT_EQ (error_mark_node, fold_for_warn (error_mark_node)); | |
8534 | } | |
8535 | ||
8536 | /* Run all of the selftests within this file. */ | |
8537 | ||
8538 | static void | |
8539 | c_common_c_tests () | |
8540 | { | |
8541 | test_fold_for_warn (); | |
8542 | } | |
8543 | ||
7051d239 | 8544 | /* Run all of the tests within c-family. */ |
8545 | ||
8546 | void | |
8547 | c_family_tests (void) | |
8548 | { | |
d76863c8 | 8549 | c_common_c_tests (); |
7051d239 | 8550 | c_format_c_tests (); |
6564acaf | 8551 | c_indentation_c_tests (); |
d76863c8 | 8552 | c_pretty_print_c_tests (); |
08233401 | 8553 | c_spellcheck_cc_tests (); |
7051d239 | 8554 | } |
8555 | ||
8556 | } // namespace selftest | |
8557 | ||
8558 | #endif /* #if CHECKING_P */ | |
8559 | ||
7f9c8569 | 8560 | /* Attempt to locate a suitable location within FILE for a |
8561 | #include directive to be inserted before. FILE should | |
8562 | be a string from libcpp (pointer equality is used). | |
8563 | LOC is the location of the relevant diagnostic. | |
8564 | ||
8565 | Attempt to return the location within FILE immediately | |
8566 | after the last #include within that file, or the start of | |
8567 | that file if it has no #include directives. | |
8568 | ||
8569 | Return UNKNOWN_LOCATION if no suitable location is found, | |
8570 | or if an error occurs. */ | |
8571 | ||
8572 | static location_t | |
8573 | try_to_locate_new_include_insertion_point (const char *file, location_t loc) | |
8574 | { | |
8575 | /* Locate the last ordinary map within FILE that ended with a #include. */ | |
8576 | const line_map_ordinary *last_include_ord_map = NULL; | |
8577 | ||
8578 | /* ...and the next ordinary map within FILE after that one. */ | |
8579 | const line_map_ordinary *last_ord_map_after_include = NULL; | |
8580 | ||
8581 | /* ...and the first ordinary map within FILE. */ | |
8582 | const line_map_ordinary *first_ord_map_in_file = NULL; | |
8583 | ||
8584 | /* Get ordinary map containing LOC (or its expansion). */ | |
8585 | const line_map_ordinary *ord_map_for_loc = NULL; | |
8586 | loc = linemap_resolve_location (line_table, loc, LRK_MACRO_EXPANSION_POINT, | |
8587 | &ord_map_for_loc); | |
8588 | gcc_assert (ord_map_for_loc); | |
8589 | ||
8590 | for (unsigned int i = 0; i < LINEMAPS_ORDINARY_USED (line_table); i++) | |
8591 | { | |
8592 | const line_map_ordinary *ord_map | |
8593 | = LINEMAPS_ORDINARY_MAP_AT (line_table, i); | |
8594 | ||
03410c5e | 8595 | if (const line_map_ordinary *from |
8596 | = linemap_included_from_linemap (line_table, ord_map)) | |
7f9c8569 | 8597 | if (from->to_file == file) |
8598 | { | |
8599 | last_include_ord_map = from; | |
8600 | last_ord_map_after_include = NULL; | |
8601 | } | |
8602 | ||
8603 | if (ord_map->to_file == file) | |
8604 | { | |
8605 | if (!first_ord_map_in_file) | |
8606 | first_ord_map_in_file = ord_map; | |
8607 | if (last_include_ord_map && !last_ord_map_after_include) | |
8608 | last_ord_map_after_include = ord_map; | |
8609 | } | |
8610 | ||
8611 | /* Stop searching when reaching the ord_map containing LOC, | |
8612 | as it makes no sense to provide fix-it hints that appear | |
8613 | after the diagnostic in question. */ | |
8614 | if (ord_map == ord_map_for_loc) | |
8615 | break; | |
8616 | } | |
8617 | ||
8618 | /* Determine where to insert the #include. */ | |
8619 | const line_map_ordinary *ord_map_for_insertion; | |
8620 | ||
8621 | /* We want the next ordmap in the file after the last one that's a | |
8622 | #include, but failing that, the start of the file. */ | |
8623 | if (last_ord_map_after_include) | |
8624 | ord_map_for_insertion = last_ord_map_after_include; | |
8625 | else | |
8626 | ord_map_for_insertion = first_ord_map_in_file; | |
8627 | ||
8628 | if (!ord_map_for_insertion) | |
8629 | return UNKNOWN_LOCATION; | |
8630 | ||
8631 | /* The "start_location" is column 0, meaning "the whole line". | |
8632 | rich_location and edit_context can't cope with this, so use | |
8633 | column 1 instead. */ | |
8634 | location_t col_0 = ord_map_for_insertion->start_location; | |
8635 | return linemap_position_for_loc_and_offset (line_table, col_0, 1); | |
8636 | } | |
8637 | ||
8638 | /* A map from filenames to sets of headers added to them, for | |
8639 | ensuring idempotency within maybe_add_include_fixit. */ | |
8640 | ||
8641 | /* The values within the map. We need string comparison as there's | |
8642 | no guarantee that two different diagnostics that are recommending | |
8643 | adding e.g. "<stdio.h>" are using the same buffer. */ | |
8644 | ||
067e9a50 | 8645 | typedef hash_set <const char *, false, nofree_string_hash> per_file_includes_t; |
7f9c8569 | 8646 | |
8647 | /* The map itself. We don't need string comparison for the filename keys, | |
8648 | as they come from libcpp. */ | |
8649 | ||
8650 | typedef hash_map <const char *, per_file_includes_t *> added_includes_t; | |
8651 | static added_includes_t *added_includes; | |
8652 | ||
8653 | /* Attempt to add a fix-it hint to RICHLOC, adding "#include HEADER\n" | |
8654 | in a suitable location within the file of RICHLOC's primary | |
8655 | location. | |
8656 | ||
8657 | This function is idempotent: a header will be added at most once to | |
5fe20025 | 8658 | any given file. |
8659 | ||
8660 | If OVERRIDE_LOCATION is true, then if a fix-it is added and will be | |
8661 | printed, then RICHLOC's primary location will be replaced by that of | |
8662 | the fix-it hint (for use by "inform" notes where the location of the | |
8663 | issue has already been reported). */ | |
7f9c8569 | 8664 | |
8665 | void | |
5fe20025 | 8666 | maybe_add_include_fixit (rich_location *richloc, const char *header, |
8667 | bool override_location) | |
7f9c8569 | 8668 | { |
8669 | location_t loc = richloc->get_loc (); | |
8670 | const char *file = LOCATION_FILE (loc); | |
8671 | if (!file) | |
8672 | return; | |
8673 | ||
8674 | /* Idempotency: don't add the same header more than once to a given file. */ | |
8675 | if (!added_includes) | |
8676 | added_includes = new added_includes_t (); | |
8677 | per_file_includes_t *&set = added_includes->get_or_insert (file); | |
8678 | if (set) | |
8679 | if (set->contains (header)) | |
8680 | /* ...then we've already added HEADER to that file. */ | |
8681 | return; | |
8682 | if (!set) | |
8683 | set = new per_file_includes_t (); | |
8684 | set->add (header); | |
8685 | ||
8686 | /* Attempt to locate a suitable place for the new directive. */ | |
8687 | location_t include_insert_loc | |
8688 | = try_to_locate_new_include_insertion_point (file, loc); | |
8689 | if (include_insert_loc == UNKNOWN_LOCATION) | |
8690 | return; | |
8691 | ||
8692 | char *text = xasprintf ("#include %s\n", header); | |
8693 | richloc->add_fixit_insert_before (include_insert_loc, text); | |
8694 | free (text); | |
5fe20025 | 8695 | |
8696 | if (override_location && global_dc->show_caret) | |
8697 | { | |
8698 | /* Replace the primary location with that of the insertion point for the | |
8699 | fix-it hint. | |
8700 | ||
8701 | We use SHOW_LINES_WITHOUT_RANGE so that we don't meaningless print a | |
8702 | caret for the insertion point (or colorize it). | |
8703 | ||
8704 | Hence we print e.g.: | |
8705 | ||
8706 | ../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1: note: msg 2 | |
8707 | 73 | # include <debug/vector> | |
8708 | +++ |+#include <vector> | |
8709 | 74 | #endif | |
8710 | ||
8711 | rather than: | |
8712 | ||
8713 | ../x86_64-pc-linux-gnu/libstdc++-v3/include/vector:74:1: note: msg 2 | |
8714 | 73 | # include <debug/vector> | |
8715 | +++ |+#include <vector> | |
8716 | 74 | #endif | |
8717 | | ^ | |
8718 | ||
8719 | avoiding the caret on the first column of line 74. */ | |
8720 | richloc->set_range (0, include_insert_loc, SHOW_LINES_WITHOUT_RANGE); | |
8721 | } | |
7f9c8569 | 8722 | } |
8723 | ||
b2fc0527 | 8724 | /* Attempt to convert a braced array initializer list CTOR for array |
d839099f | 8725 | TYPE into a STRING_CST for convenience and efficiency. Return |
8726 | the converted string on success or the original ctor on failure. */ | |
b2fc0527 | 8727 | |
dc0cf270 | 8728 | static tree |
d839099f | 8729 | braced_list_to_string (tree type, tree ctor) |
b2fc0527 | 8730 | { |
d839099f | 8731 | if (!tree_fits_uhwi_p (TYPE_SIZE_UNIT (type))) |
8732 | return ctor; | |
b2fc0527 | 8733 | |
8734 | /* If the array has an explicit bound, use it to constrain the size | |
8735 | of the string. If it doesn't, be sure to create a string that's | |
8736 | as long as implied by the index of the last zero specified via | |
8737 | a designator, as in: | |
8738 | const char a[] = { [7] = 0 }; */ | |
d839099f | 8739 | unsigned HOST_WIDE_INT maxelts = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
8740 | maxelts /= tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type))); | |
b2fc0527 | 8741 | |
d839099f | 8742 | /* Avoid converting initializers for zero-length arrays. */ |
8743 | if (!maxelts) | |
8744 | return ctor; | |
b2fc0527 | 8745 | |
d839099f | 8746 | unsigned HOST_WIDE_INT nelts = CONSTRUCTOR_NELTS (ctor); |
b2fc0527 | 8747 | |
8748 | auto_vec<char> str; | |
8749 | str.reserve (nelts + 1); | |
8750 | ||
8751 | unsigned HOST_WIDE_INT i; | |
8752 | tree index, value; | |
8753 | ||
8754 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (ctor), i, index, value) | |
8755 | { | |
d839099f | 8756 | unsigned HOST_WIDE_INT idx = i; |
8757 | if (index) | |
8758 | { | |
8759 | if (!tree_fits_uhwi_p (index)) | |
8760 | return ctor; | |
8761 | idx = tree_to_uhwi (index); | |
8762 | } | |
b2fc0527 | 8763 | |
8764 | /* auto_vec is limited to UINT_MAX elements. */ | |
8765 | if (idx > UINT_MAX) | |
d839099f | 8766 | return ctor; |
b2fc0527 | 8767 | |
d839099f | 8768 | /* Avoid non-constant initializers. */ |
b2fc0527 | 8769 | if (!tree_fits_shwi_p (value)) |
d839099f | 8770 | return ctor; |
b2fc0527 | 8771 | |
8772 | /* Skip over embedded nuls except the last one (initializer | |
8773 | elements are in ascending order of indices). */ | |
8774 | HOST_WIDE_INT val = tree_to_shwi (value); | |
8775 | if (!val && i + 1 < nelts) | |
8776 | continue; | |
8777 | ||
d839099f | 8778 | if (idx < str.length()) |
8779 | return ctor; | |
8780 | ||
b2fc0527 | 8781 | /* Bail if the CTOR has a block of more than 256 embedded nuls |
8782 | due to implicitly initialized elements. */ | |
8783 | unsigned nchars = (idx - str.length ()) + 1; | |
8784 | if (nchars > 256) | |
d839099f | 8785 | return ctor; |
b2fc0527 | 8786 | |
8787 | if (nchars > 1) | |
8788 | { | |
8789 | str.reserve (idx); | |
8790 | str.quick_grow_cleared (idx); | |
8791 | } | |
8792 | ||
d839099f | 8793 | if (idx >= maxelts) |
8794 | return ctor; | |
b2fc0527 | 8795 | |
8796 | str.safe_insert (idx, val); | |
8797 | } | |
8798 | ||
d839099f | 8799 | /* Append a nul string termination. */ |
8800 | if (str.length () < maxelts) | |
b2fc0527 | 8801 | str.safe_push (0); |
8802 | ||
d839099f | 8803 | /* Build a STRING_CST with the same type as the array. */ |
b2fc0527 | 8804 | tree res = build_string (str.length (), str.begin ()); |
8805 | TREE_TYPE (res) = type; | |
8806 | return res; | |
8807 | } | |
8808 | ||
dc0cf270 | 8809 | /* Attempt to convert a CTOR containing braced array initializer lists |
8810 | for array TYPE into one containing STRING_CSTs, for convenience and | |
8811 | efficiency. Recurse for arrays of arrays and member initializers. | |
8812 | Return the converted CTOR or STRING_CST on success or the original | |
8813 | CTOR otherwise. */ | |
8814 | ||
8815 | tree | |
8816 | braced_lists_to_strings (tree type, tree ctor) | |
8817 | { | |
8818 | if (TREE_CODE (ctor) != CONSTRUCTOR) | |
8819 | return ctor; | |
8820 | ||
8821 | tree_code code = TREE_CODE (type); | |
8822 | ||
8823 | tree ttp; | |
8824 | if (code == ARRAY_TYPE) | |
8825 | ttp = TREE_TYPE (type); | |
8826 | else if (code == RECORD_TYPE) | |
8827 | { | |
8828 | ttp = TREE_TYPE (ctor); | |
8829 | if (TREE_CODE (ttp) == ARRAY_TYPE) | |
8830 | { | |
8831 | type = ttp; | |
8832 | ttp = TREE_TYPE (ttp); | |
8833 | } | |
8834 | } | |
8835 | else | |
8836 | return ctor; | |
8837 | ||
8838 | if (TYPE_STRING_FLAG (ttp)) | |
8839 | return braced_list_to_string (type, ctor); | |
8840 | ||
8841 | code = TREE_CODE (ttp); | |
8842 | if (code == ARRAY_TYPE || code == RECORD_TYPE) | |
8843 | { | |
8844 | /* Handle array of arrays or struct member initializers. */ | |
8845 | tree val; | |
8846 | unsigned HOST_WIDE_INT idx; | |
8847 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor), idx, val) | |
8848 | { | |
8849 | val = braced_lists_to_strings (ttp, val); | |
8850 | CONSTRUCTOR_ELT (ctor, idx)->value = val; | |
8851 | } | |
8852 | } | |
8853 | ||
8854 | return ctor; | |
8855 | } | |
8856 | ||
7bedc3a0 | 8857 | #include "gt-c-family-c-common.h" |