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Commit | Line | Data |
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b30f223b | 1 | /* Subroutines shared by all languages that are variants of C. |
1574ef13 | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
6fc3c3c0 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
b30f223b | 4 | |
1322177d | 5 | This file is part of GCC. |
b30f223b | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 9 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 10 | version. |
b30f223b | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
b30f223b RS |
16 | |
17 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
b30f223b RS |
20 | |
21 | #include "config.h" | |
670ee920 | 22 | #include "system.h" |
4977bab6 ZW |
23 | #include "coretypes.h" |
24 | #include "tm.h" | |
d9b2742a | 25 | #include "intl.h" |
b30f223b | 26 | #include "tree.h" |
b30f223b | 27 | #include "flags.h" |
d6f4ec51 | 28 | #include "output.h" |
e2af664c | 29 | #include "c-pragma.h" |
3932261a | 30 | #include "rtl.h" |
1526a060 | 31 | #include "ggc.h" |
17211ab5 | 32 | #include "varray.h" |
c6991660 | 33 | #include "expr.h" |
8f17b5c5 | 34 | #include "c-common.h" |
22703ccc | 35 | #include "diagnostic.h" |
7bdb32b9 | 36 | #include "tm_p.h" |
235cfbc4 | 37 | #include "obstack.h" |
c8724862 | 38 | #include "cpplib.h" |
12a68f1f | 39 | #include "target.h" |
7afff7cf | 40 | #include "langhooks.h" |
d57a4b98 | 41 | #include "tree-inline.h" |
0bfa5f65 | 42 | #include "c-tree.h" |
5f1989e6 | 43 | #include "toplev.h" |
6de9cd9a DN |
44 | #include "tree-iterator.h" |
45 | #include "hashtab.h" | |
c31b8e1b | 46 | #include "tree-mudflap.h" |
d974312d | 47 | #include "opts.h" |
010c4d9c | 48 | #include "real.h" |
ce91e74c | 49 | #include "cgraph.h" |
1f1d5130 | 50 | #include "target-def.h" |
ab22c1fa | 51 | #include "fixed-value.h" |
cb60f38d | 52 | |
81a75f0f | 53 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
c8724862 | 54 | |
eaa7c03f JM |
55 | /* We let tm.h override the types used here, to handle trivial differences |
56 | such as the choice of unsigned int or long unsigned int for size_t. | |
57 | When machines start needing nontrivial differences in the size type, | |
58 | it would be best to do something here to figure out automatically | |
59 | from other information what type to use. */ | |
60 | ||
61 | #ifndef SIZE_TYPE | |
62 | #define SIZE_TYPE "long unsigned int" | |
63 | #endif | |
64 | ||
d1c38823 ZD |
65 | #ifndef PID_TYPE |
66 | #define PID_TYPE "int" | |
67 | #endif | |
68 | ||
b6baa67d KVH |
69 | #ifndef CHAR16_TYPE |
70 | #define CHAR16_TYPE "short unsigned int" | |
71 | #endif | |
72 | ||
73 | #ifndef CHAR32_TYPE | |
74 | #define CHAR32_TYPE "unsigned int" | |
75 | #endif | |
76 | ||
eaa7c03f JM |
77 | #ifndef WCHAR_TYPE |
78 | #define WCHAR_TYPE "int" | |
79 | #endif | |
80 | ||
a11eba95 ZW |
81 | /* WCHAR_TYPE gets overridden by -fshort-wchar. */ |
82 | #define MODIFIED_WCHAR_TYPE \ | |
83 | (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE) | |
84 | ||
0884b60c BS |
85 | #ifndef PTRDIFF_TYPE |
86 | #define PTRDIFF_TYPE "long int" | |
87 | #endif | |
88 | ||
5fd8e536 JM |
89 | #ifndef WINT_TYPE |
90 | #define WINT_TYPE "unsigned int" | |
91 | #endif | |
92 | ||
93 | #ifndef INTMAX_TYPE | |
94 | #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
95 | ? "int" \ | |
96 | : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
97 | ? "long int" \ | |
98 | : "long long int")) | |
99 | #endif | |
100 | ||
101 | #ifndef UINTMAX_TYPE | |
102 | #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
103 | ? "unsigned int" \ | |
104 | : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
105 | ? "long unsigned int" \ | |
106 | : "long long unsigned int")) | |
107 | #endif | |
108 | ||
7f4edbcb | 109 | /* The following symbols are subsumed in the c_global_trees array, and |
d125d268 | 110 | listed here individually for documentation purposes. |
7f4edbcb BS |
111 | |
112 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
113 | ||
114 | tree short_integer_type_node; | |
115 | tree long_integer_type_node; | |
116 | tree long_long_integer_type_node; | |
117 | ||
118 | tree short_unsigned_type_node; | |
119 | tree long_unsigned_type_node; | |
120 | tree long_long_unsigned_type_node; | |
121 | ||
de7df9eb JM |
122 | tree truthvalue_type_node; |
123 | tree truthvalue_false_node; | |
124 | tree truthvalue_true_node; | |
7f4edbcb BS |
125 | |
126 | tree ptrdiff_type_node; | |
127 | ||
128 | tree unsigned_char_type_node; | |
129 | tree signed_char_type_node; | |
130 | tree wchar_type_node; | |
131 | tree signed_wchar_type_node; | |
132 | tree unsigned_wchar_type_node; | |
133 | ||
b6baa67d KVH |
134 | tree char16_type_node; |
135 | tree char32_type_node; | |
136 | ||
7f4edbcb BS |
137 | tree float_type_node; |
138 | tree double_type_node; | |
139 | tree long_double_type_node; | |
140 | ||
141 | tree complex_integer_type_node; | |
142 | tree complex_float_type_node; | |
143 | tree complex_double_type_node; | |
144 | tree complex_long_double_type_node; | |
145 | ||
9a8ce21f JG |
146 | tree dfloat32_type_node; |
147 | tree dfloat64_type_node; | |
148 | tree_dfloat128_type_node; | |
149 | ||
7f4edbcb BS |
150 | tree intQI_type_node; |
151 | tree intHI_type_node; | |
152 | tree intSI_type_node; | |
153 | tree intDI_type_node; | |
154 | tree intTI_type_node; | |
155 | ||
156 | tree unsigned_intQI_type_node; | |
157 | tree unsigned_intHI_type_node; | |
158 | tree unsigned_intSI_type_node; | |
159 | tree unsigned_intDI_type_node; | |
160 | tree unsigned_intTI_type_node; | |
161 | ||
162 | tree widest_integer_literal_type_node; | |
163 | tree widest_unsigned_literal_type_node; | |
164 | ||
165 | Nodes for types `void *' and `const void *'. | |
166 | ||
167 | tree ptr_type_node, const_ptr_type_node; | |
168 | ||
169 | Nodes for types `char *' and `const char *'. | |
170 | ||
171 | tree string_type_node, const_string_type_node; | |
172 | ||
173 | Type `char[SOMENUMBER]'. | |
174 | Used when an array of char is needed and the size is irrelevant. | |
175 | ||
176 | tree char_array_type_node; | |
177 | ||
178 | Type `int[SOMENUMBER]' or something like it. | |
179 | Used when an array of int needed and the size is irrelevant. | |
180 | ||
181 | tree int_array_type_node; | |
182 | ||
183 | Type `wchar_t[SOMENUMBER]' or something like it. | |
184 | Used when a wide string literal is created. | |
185 | ||
186 | tree wchar_array_type_node; | |
187 | ||
b6baa67d KVH |
188 | Type `char16_t[SOMENUMBER]' or something like it. |
189 | Used when a UTF-16 string literal is created. | |
190 | ||
191 | tree char16_array_type_node; | |
192 | ||
193 | Type `char32_t[SOMENUMBER]' or something like it. | |
194 | Used when a UTF-32 string literal is created. | |
195 | ||
196 | tree char32_array_type_node; | |
197 | ||
7f4edbcb BS |
198 | Type `int ()' -- used for implicit declaration of functions. |
199 | ||
200 | tree default_function_type; | |
201 | ||
7f4edbcb BS |
202 | A VOID_TYPE node, packaged in a TREE_LIST. |
203 | ||
204 | tree void_list_node; | |
205 | ||
684d9f3b | 206 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
0ba8a114 NS |
207 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
208 | VAR_DECLS, but C++ does.) | |
63ad61ed | 209 | |
0ba8a114 | 210 | tree function_name_decl_node; |
684d9f3b | 211 | tree pretty_function_name_decl_node; |
0ba8a114 NS |
212 | tree c99_function_name_decl_node; |
213 | ||
214 | Stack of nested function name VAR_DECLs. | |
35b1a6fa | 215 | |
0ba8a114 | 216 | tree saved_function_name_decls; |
63ad61ed | 217 | |
7f4edbcb BS |
218 | */ |
219 | ||
220 | tree c_global_trees[CTI_MAX]; | |
17211ab5 | 221 | \f |
4078b403 NB |
222 | /* Switches common to the C front ends. */ |
223 | ||
fa10beec | 224 | /* Nonzero if preprocessing only. */ |
63973df3 | 225 | |
aaf93206 NB |
226 | int flag_preprocess_only; |
227 | ||
63973df3 NB |
228 | /* Nonzero means don't output line number information. */ |
229 | ||
230 | char flag_no_line_commands; | |
231 | ||
232 | /* Nonzero causes -E output not to be done, but directives such as | |
233 | #define that have side effects are still obeyed. */ | |
234 | ||
235 | char flag_no_output; | |
236 | ||
237 | /* Nonzero means dump macros in some fashion. */ | |
238 | ||
239 | char flag_dump_macros; | |
240 | ||
241 | /* Nonzero means pass #include lines through to the output. */ | |
242 | ||
243 | char flag_dump_includes; | |
244 | ||
c0d578e6 GK |
245 | /* Nonzero means process PCH files while preprocessing. */ |
246 | ||
247 | bool flag_pch_preprocess; | |
248 | ||
17211ab5 GK |
249 | /* The file name to which we should write a precompiled header, or |
250 | NULL if no header will be written in this compile. */ | |
251 | ||
252 | const char *pch_file; | |
253 | ||
3df89291 NB |
254 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
255 | user's namespace. */ | |
256 | int flag_iso; | |
257 | ||
258 | /* Nonzero if -undef was given. It suppresses target built-in macros | |
259 | and assertions. */ | |
260 | int flag_undef; | |
261 | ||
6bcedb4e MM |
262 | /* Nonzero means don't recognize the non-ANSI builtin functions. */ |
263 | ||
264 | int flag_no_builtin; | |
265 | ||
266 | /* Nonzero means don't recognize the non-ANSI builtin functions. | |
267 | -ansi sets this. */ | |
268 | ||
269 | int flag_no_nonansi_builtin; | |
270 | ||
eaa7c03f JM |
271 | /* Nonzero means give `double' the same size as `float'. */ |
272 | ||
273 | int flag_short_double; | |
274 | ||
275 | /* Nonzero means give `wchar_t' the same size as `short'. */ | |
276 | ||
277 | int flag_short_wchar; | |
278 | ||
00c8e9f6 MS |
279 | /* Nonzero means allow implicit conversions between vectors with |
280 | differing numbers of subparts and/or differing element types. */ | |
281 | int flag_lax_vector_conversions; | |
282 | ||
750491fc RH |
283 | /* Nonzero means allow Microsoft extensions without warnings or errors. */ |
284 | int flag_ms_extensions; | |
285 | ||
4078b403 NB |
286 | /* Nonzero means don't recognize the keyword `asm'. */ |
287 | ||
288 | int flag_no_asm; | |
289 | ||
4078b403 NB |
290 | /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */ |
291 | ||
292 | int flag_signed_bitfields = 1; | |
4078b403 | 293 | |
35b1a6fa | 294 | /* Warn about #pragma directives that are not recognized. */ |
4078b403 | 295 | |
35b1a6fa | 296 | int warn_unknown_pragmas; /* Tri state variable. */ |
4078b403 | 297 | |
4078b403 NB |
298 | /* Warn about format/argument anomalies in calls to formatted I/O functions |
299 | (*printf, *scanf, strftime, strfmon, etc.). */ | |
300 | ||
301 | int warn_format; | |
302 | ||
b2f97e4a MM |
303 | /* Warn about using __null (as NULL in C++) as sentinel. For code compiled |
304 | with GCC this doesn't matter as __null is guaranteed to have the right | |
305 | size. */ | |
306 | ||
307 | int warn_strict_null_sentinel; | |
308 | ||
264fa2db ZL |
309 | /* Zero means that faster, ...NonNil variants of objc_msgSend... |
310 | calls will be used in ObjC; passing nil receivers to such calls | |
311 | will most likely result in crashes. */ | |
312 | int flag_nil_receivers = 1; | |
313 | ||
264fa2db ZL |
314 | /* Nonzero means that code generation will be altered to support |
315 | "zero-link" execution. This currently affects ObjC only, but may | |
316 | affect other languages in the future. */ | |
317 | int flag_zero_link = 0; | |
318 | ||
319 | /* Nonzero means emit an '__OBJC, __image_info' for the current translation | |
320 | unit. It will inform the ObjC runtime that class definition(s) herein | |
321 | contained are to replace one(s) previously loaded. */ | |
322 | int flag_replace_objc_classes = 0; | |
9f63daea | 323 | |
4078b403 NB |
324 | /* C/ObjC language option variables. */ |
325 | ||
326 | ||
4078b403 NB |
327 | /* Nonzero means allow type mismatches in conditional expressions; |
328 | just make their values `void'. */ | |
329 | ||
330 | int flag_cond_mismatch; | |
331 | ||
332 | /* Nonzero means enable C89 Amendment 1 features. */ | |
333 | ||
334 | int flag_isoc94; | |
335 | ||
336 | /* Nonzero means use the ISO C99 dialect of C. */ | |
337 | ||
338 | int flag_isoc99; | |
339 | ||
6614fd40 | 340 | /* Nonzero means that we have builtin functions, and main is an int. */ |
4078b403 NB |
341 | |
342 | int flag_hosted = 1; | |
343 | ||
4078b403 NB |
344 | /* Warn if main is suspicious. */ |
345 | ||
346 | int warn_main; | |
347 | ||
4078b403 NB |
348 | |
349 | /* ObjC language option variables. */ | |
350 | ||
351 | ||
352 | /* Open and close the file for outputting class declarations, if | |
353 | requested (ObjC). */ | |
354 | ||
355 | int flag_gen_declaration; | |
356 | ||
4078b403 NB |
357 | /* Tells the compiler that this is a special run. Do not perform any |
358 | compiling, instead we are to test some platform dependent features | |
359 | and output a C header file with appropriate definitions. */ | |
360 | ||
361 | int print_struct_values; | |
362 | ||
fa10beec | 363 | /* Tells the compiler what is the constant string class for ObjC. */ |
4078b403 NB |
364 | |
365 | const char *constant_string_class_name; | |
366 | ||
4078b403 NB |
367 | |
368 | /* C++ language option variables. */ | |
369 | ||
370 | ||
371 | /* Nonzero means don't recognize any extension keywords. */ | |
372 | ||
373 | int flag_no_gnu_keywords; | |
374 | ||
375 | /* Nonzero means do emit exported implementations of functions even if | |
376 | they can be inlined. */ | |
377 | ||
378 | int flag_implement_inlines = 1; | |
379 | ||
4078b403 NB |
380 | /* Nonzero means that implicit instantiations will be emitted if needed. */ |
381 | ||
382 | int flag_implicit_templates = 1; | |
383 | ||
384 | /* Nonzero means that implicit instantiations of inline templates will be | |
385 | emitted if needed, even if instantiations of non-inline templates | |
386 | aren't. */ | |
387 | ||
388 | int flag_implicit_inline_templates = 1; | |
389 | ||
390 | /* Nonzero means generate separate instantiation control files and | |
391 | juggle them at link time. */ | |
392 | ||
393 | int flag_use_repository; | |
394 | ||
395 | /* Nonzero if we want to issue diagnostics that the standard says are not | |
396 | required. */ | |
397 | ||
398 | int flag_optional_diags = 1; | |
399 | ||
400 | /* Nonzero means we should attempt to elide constructors when possible. */ | |
401 | ||
402 | int flag_elide_constructors = 1; | |
403 | ||
404 | /* Nonzero means that member functions defined in class scope are | |
405 | inline by default. */ | |
406 | ||
407 | int flag_default_inline = 1; | |
408 | ||
409 | /* Controls whether compiler generates 'type descriptor' that give | |
410 | run-time type information. */ | |
411 | ||
412 | int flag_rtti = 1; | |
413 | ||
414 | /* Nonzero if we want to conserve space in the .o files. We do this | |
415 | by putting uninitialized data and runtime initialized data into | |
416 | .common instead of .data at the expense of not flagging multiple | |
417 | definitions. */ | |
418 | ||
419 | int flag_conserve_space; | |
420 | ||
421 | /* Nonzero if we want to obey access control semantics. */ | |
422 | ||
423 | int flag_access_control = 1; | |
424 | ||
425 | /* Nonzero if we want to check the return value of new and avoid calling | |
426 | constructors if it is a null pointer. */ | |
427 | ||
428 | int flag_check_new; | |
429 | ||
c1ae8be5 | 430 | /* The C++ dialect being used. C++98 is the default. */ |
966541e3 | 431 | |
c1ae8be5 | 432 | enum cxx_dialect cxx_dialect = cxx98; |
966541e3 | 433 | |
4078b403 NB |
434 | /* Nonzero if we want the new ISO rules for pushing a new scope for `for' |
435 | initialization variables. | |
436 | 0: Old rules, set by -fno-for-scope. | |
437 | 2: New ISO rules, set by -ffor-scope. | |
438 | 1: Try to implement new ISO rules, but with backup compatibility | |
439 | (and warnings). This is the default, for now. */ | |
440 | ||
441 | int flag_new_for_scope = 1; | |
442 | ||
443 | /* Nonzero if we want to emit defined symbols with common-like linkage as | |
444 | weak symbols where possible, in order to conform to C++ semantics. | |
445 | Otherwise, emit them as local symbols. */ | |
446 | ||
447 | int flag_weak = 1; | |
448 | ||
b20d9f0c AO |
449 | /* 0 means we want the preprocessor to not emit line directives for |
450 | the current working directory. 1 means we want it to do it. -1 | |
451 | means we should decide depending on whether debugging information | |
452 | is being emitted or not. */ | |
453 | ||
454 | int flag_working_directory = -1; | |
455 | ||
4078b403 | 456 | /* Nonzero to use __cxa_atexit, rather than atexit, to register |
c7b5e395 GK |
457 | destructors for local statics and global objects. '2' means it has been |
458 | set nonzero as a default, not by a command-line flag. */ | |
4078b403 NB |
459 | |
460 | int flag_use_cxa_atexit = DEFAULT_USE_CXA_ATEXIT; | |
461 | ||
c7b5e395 GK |
462 | /* Nonzero to use __cxa_get_exception_ptr in C++ exception-handling |
463 | code. '2' means it has not been set explicitly on the command line. */ | |
464 | ||
465 | int flag_use_cxa_get_exception_ptr = 2; | |
466 | ||
4078b403 NB |
467 | /* Nonzero means to implement standard semantics for exception |
468 | specifications, calling unexpected if an exception is thrown that | |
469 | doesn't match the specification. Zero means to treat them as | |
470 | assertions and optimize accordingly, but not check them. */ | |
471 | ||
472 | int flag_enforce_eh_specs = 1; | |
473 | ||
40aac948 JM |
474 | /* Nonzero means to generate thread-safe code for initializing local |
475 | statics. */ | |
476 | ||
477 | int flag_threadsafe_statics = 1; | |
478 | ||
4078b403 NB |
479 | /* Nonzero means warn about implicit declarations. */ |
480 | ||
481 | int warn_implicit = 1; | |
482 | ||
4078b403 NB |
483 | /* Maximum template instantiation depth. This limit is rather |
484 | arbitrary, but it exists to limit the time it takes to notice | |
485 | infinite template instantiations. */ | |
486 | ||
487 | int max_tinst_depth = 500; | |
488 | ||
489 | ||
490 | ||
f09f1de5 MM |
491 | /* The elements of `ridpointers' are identifier nodes for the reserved |
492 | type names and storage classes. It is indexed by a RID_... value. */ | |
493 | tree *ridpointers; | |
494 | ||
35b1a6fa | 495 | tree (*make_fname_decl) (tree, int); |
2ce07e2d | 496 | |
e78a3b42 RK |
497 | /* Nonzero means the expression being parsed will never be evaluated. |
498 | This is a count, since unevaluated expressions can nest. */ | |
499 | int skip_evaluation; | |
500 | ||
ec5c56db | 501 | /* Information about how a function name is generated. */ |
0ba8a114 NS |
502 | struct fname_var_t |
503 | { | |
8b60264b KG |
504 | tree *const decl; /* pointer to the VAR_DECL. */ |
505 | const unsigned rid; /* RID number for the identifier. */ | |
506 | const int pretty; /* How pretty is it? */ | |
0ba8a114 NS |
507 | }; |
508 | ||
ec5c56db | 509 | /* The three ways of getting then name of the current function. */ |
0ba8a114 NS |
510 | |
511 | const struct fname_var_t fname_vars[] = | |
512 | { | |
ec5c56db | 513 | /* C99 compliant __func__, must be first. */ |
0ba8a114 | 514 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
ec5c56db | 515 | /* GCC __FUNCTION__ compliant. */ |
0ba8a114 | 516 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
ec5c56db | 517 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
0ba8a114 NS |
518 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
519 | {NULL, 0, 0}, | |
520 | }; | |
521 | ||
a6c0a76c SB |
522 | static tree check_case_value (tree); |
523 | static bool check_case_bounds (tree, tree, tree *, tree *); | |
4724b3de | 524 | |
35b1a6fa AJ |
525 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
526 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
527 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
528 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
52bf96d2 JH |
529 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
530 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
35b1a6fa AJ |
531 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
532 | static tree handle_always_inline_attribute (tree *, tree, tree, int, | |
533 | bool *); | |
d752cfdb JJ |
534 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
535 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0691d1d4 | 536 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
d2af6a68 | 537 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
538 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
539 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
ce91e74c JH |
540 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
541 | bool *); | |
35b1a6fa AJ |
542 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
543 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
544 | int, bool *); | |
545 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
546 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
547 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
548 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
549 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
550 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
551 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); | |
a0203ca7 | 552 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
35b1a6fa AJ |
553 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
554 | bool *); | |
555 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
556 | bool *); | |
557 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
558 | tree, int, bool *); | |
559 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
6e9a3221 | 560 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
561 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
562 | bool *); | |
563 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
dcd6de6d | 564 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
565 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
566 | bool *); | |
567 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
568 | bool *); | |
569 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
570 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
571 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
72954a4f JM |
572 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
573 | bool *); | |
3d091dac | 574 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5d32c25 | 575 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
51bc54a6 | 576 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa | 577 | |
94a0dd7b | 578 | static void check_function_nonnull (tree, int, tree *); |
35b1a6fa AJ |
579 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
580 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
581 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
d07605f5 | 582 | static int resort_field_decl_cmp (const void *, const void *); |
b34c7881 | 583 | |
eea1139b ILT |
584 | /* Reserved words. The third field is a mask: keywords are disabled |
585 | if they match the mask. | |
586 | ||
587 | Masks for languages: | |
588 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
589 | C --std=c99: D_CXXONLY | D_OBJC | |
590 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
591 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
592 | C++ --std=c0x: D_CONLY | D_OBJC | |
593 | ObjC++ is like C++ except that D_OBJC is not set | |
594 | ||
595 | If -fno-asm is used, D_ASM is added to the mask. If | |
596 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
597 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
598 | In C with -Wcxx-compat, we warn if D_CXXWARN is set. */ | |
599 | ||
600 | const struct c_common_resword c_common_reswords[] = | |
601 | { | |
602 | { "_Bool", RID_BOOL, D_CONLY }, | |
603 | { "_Complex", RID_COMPLEX, 0 }, | |
604 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, | |
605 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
606 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
607 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
608 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
609 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
610 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, | |
611 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
612 | { "__alignof", RID_ALIGNOF, 0 }, | |
613 | { "__alignof__", RID_ALIGNOF, 0 }, | |
614 | { "__asm", RID_ASM, 0 }, | |
615 | { "__asm__", RID_ASM, 0 }, | |
616 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
617 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
618 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, | |
619 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, | |
620 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
621 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
622 | { "__complex", RID_COMPLEX, 0 }, | |
623 | { "__complex__", RID_COMPLEX, 0 }, | |
624 | { "__const", RID_CONST, 0 }, | |
625 | { "__const__", RID_CONST, 0 }, | |
626 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
627 | { "__extension__", RID_EXTENSION, 0 }, | |
628 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
629 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
630 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
631 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
632 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
633 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
634 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
635 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
636 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
637 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, | |
638 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
639 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
640 | { "__is_convertible_to", RID_IS_CONVERTIBLE_TO, D_CXXONLY }, | |
641 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, | |
642 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
643 | { "__is_pod", RID_IS_POD, D_CXXONLY }, | |
644 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
645 | { "__is_union", RID_IS_UNION, D_CXXONLY }, | |
646 | { "__imag", RID_IMAGPART, 0 }, | |
647 | { "__imag__", RID_IMAGPART, 0 }, | |
648 | { "__inline", RID_INLINE, 0 }, | |
649 | { "__inline__", RID_INLINE, 0 }, | |
650 | { "__label__", RID_LABEL, 0 }, | |
651 | { "__null", RID_NULL, 0 }, | |
652 | { "__real", RID_REALPART, 0 }, | |
653 | { "__real__", RID_REALPART, 0 }, | |
654 | { "__restrict", RID_RESTRICT, 0 }, | |
655 | { "__restrict__", RID_RESTRICT, 0 }, | |
656 | { "__signed", RID_SIGNED, 0 }, | |
657 | { "__signed__", RID_SIGNED, 0 }, | |
658 | { "__thread", RID_THREAD, 0 }, | |
659 | { "__typeof", RID_TYPEOF, 0 }, | |
660 | { "__typeof__", RID_TYPEOF, 0 }, | |
661 | { "__volatile", RID_VOLATILE, 0 }, | |
662 | { "__volatile__", RID_VOLATILE, 0 }, | |
663 | { "asm", RID_ASM, D_ASM }, | |
664 | { "auto", RID_AUTO, 0 }, | |
665 | { "bool", RID_BOOL, D_CXXONLY }, | |
666 | { "break", RID_BREAK, 0 }, | |
667 | { "case", RID_CASE, 0 }, | |
668 | { "catch", RID_CATCH, D_CXX_OBJC }, | |
669 | { "char", RID_CHAR, 0 }, | |
670 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX0X }, | |
671 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX0X }, | |
672 | { "class", RID_CLASS, D_CXX_OBJC }, | |
673 | { "const", RID_CONST, 0 }, | |
674 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, | |
675 | { "continue", RID_CONTINUE, 0 }, | |
676 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX0X }, | |
677 | { "default", RID_DEFAULT, 0 }, | |
678 | { "delete", RID_DELETE, D_CXXONLY }, | |
679 | { "do", RID_DO, 0 }, | |
680 | { "double", RID_DOUBLE, 0 }, | |
681 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
682 | { "else", RID_ELSE, 0 }, | |
683 | { "enum", RID_ENUM, 0 }, | |
684 | { "explicit", RID_EXPLICIT, D_CXXONLY }, | |
685 | { "export", RID_EXPORT, D_CXXONLY }, | |
686 | { "extern", RID_EXTERN, 0 }, | |
687 | { "false", RID_FALSE, D_CXXONLY }, | |
688 | { "float", RID_FLOAT, 0 }, | |
689 | { "for", RID_FOR, 0 }, | |
690 | { "friend", RID_FRIEND, D_CXXONLY }, | |
691 | { "goto", RID_GOTO, 0 }, | |
692 | { "if", RID_IF, 0 }, | |
693 | { "inline", RID_INLINE, D_EXT89 }, | |
694 | { "int", RID_INT, 0 }, | |
695 | { "long", RID_LONG, 0 }, | |
696 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
697 | { "namespace", RID_NAMESPACE, D_CXXONLY }, | |
698 | { "new", RID_NEW, D_CXXONLY }, | |
699 | { "operator", RID_OPERATOR, D_CXXONLY }, | |
700 | { "private", RID_PRIVATE, D_CXX_OBJC }, | |
701 | { "protected", RID_PROTECTED, D_CXX_OBJC }, | |
702 | { "public", RID_PUBLIC, D_CXX_OBJC }, | |
703 | { "register", RID_REGISTER, 0 }, | |
704 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
705 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
706 | { "return", RID_RETURN, 0 }, | |
707 | { "short", RID_SHORT, 0 }, | |
708 | { "signed", RID_SIGNED, 0 }, | |
709 | { "sizeof", RID_SIZEOF, 0 }, | |
710 | { "static", RID_STATIC, 0 }, | |
711 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
712 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, | |
713 | { "struct", RID_STRUCT, 0 }, | |
714 | { "switch", RID_SWITCH, 0 }, | |
715 | { "template", RID_TEMPLATE, D_CXXONLY }, | |
716 | { "this", RID_THIS, D_CXXONLY }, | |
717 | { "throw", RID_THROW, D_CXX_OBJC }, | |
718 | { "true", RID_TRUE, D_CXXONLY }, | |
719 | { "try", RID_TRY, D_CXX_OBJC }, | |
720 | { "typedef", RID_TYPEDEF, 0 }, | |
721 | { "typename", RID_TYPENAME, D_CXXONLY }, | |
722 | { "typeid", RID_TYPEID, D_CXXONLY }, | |
723 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, | |
724 | { "union", RID_UNION, 0 }, | |
725 | { "unsigned", RID_UNSIGNED, 0 }, | |
726 | { "using", RID_USING, D_CXXONLY }, | |
727 | { "virtual", RID_VIRTUAL, D_CXXONLY }, | |
728 | { "void", RID_VOID, 0 }, | |
729 | { "volatile", RID_VOLATILE, 0 }, | |
730 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
731 | { "while", RID_WHILE, 0 }, | |
732 | /* These Objective-C keywords are recognized only immediately after | |
733 | an '@'. */ | |
734 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
735 | { "defs", RID_AT_DEFS, D_OBJC }, | |
736 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
737 | { "end", RID_AT_END, D_OBJC }, | |
738 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
739 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
740 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
741 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
742 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
743 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
744 | /* These are recognized only in protocol-qualifier context | |
745 | (see above) */ | |
746 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
747 | { "byref", RID_BYREF, D_OBJC }, | |
748 | { "in", RID_IN, D_OBJC }, | |
749 | { "inout", RID_INOUT, D_OBJC }, | |
750 | { "oneway", RID_ONEWAY, D_OBJC }, | |
751 | { "out", RID_OUT, D_OBJC }, | |
752 | }; | |
753 | ||
754 | const unsigned int num_c_common_reswords = | |
755 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
756 | ||
349ae713 NB |
757 | /* Table of machine-independent attributes common to all C-like languages. */ |
758 | const struct attribute_spec c_common_attribute_table[] = | |
759 | { | |
760 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ | |
761 | { "packed", 0, 0, false, false, false, | |
35b1a6fa | 762 | handle_packed_attribute }, |
349ae713 NB |
763 | { "nocommon", 0, 0, true, false, false, |
764 | handle_nocommon_attribute }, | |
765 | { "common", 0, 0, true, false, false, | |
766 | handle_common_attribute }, | |
767 | /* FIXME: logically, noreturn attributes should be listed as | |
768 | "false, true, true" and apply to function types. But implementing this | |
769 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
770 | on a decl to identify non-returning functions to be located and fixed | |
771 | to check the function type instead. */ | |
772 | { "noreturn", 0, 0, true, false, false, | |
773 | handle_noreturn_attribute }, | |
774 | { "volatile", 0, 0, true, false, false, | |
775 | handle_noreturn_attribute }, | |
776 | { "noinline", 0, 0, true, false, false, | |
777 | handle_noinline_attribute }, | |
778 | { "always_inline", 0, 0, true, false, false, | |
779 | handle_always_inline_attribute }, | |
4eb7fd83 JJ |
780 | { "gnu_inline", 0, 0, true, false, false, |
781 | handle_gnu_inline_attribute }, | |
d752cfdb JJ |
782 | { "artificial", 0, 0, true, false, false, |
783 | handle_artificial_attribute }, | |
0691d1d4 | 784 | { "flatten", 0, 0, true, false, false, |
c22cacf3 | 785 | handle_flatten_attribute }, |
349ae713 NB |
786 | { "used", 0, 0, true, false, false, |
787 | handle_used_attribute }, | |
788 | { "unused", 0, 0, false, false, false, | |
789 | handle_unused_attribute }, | |
ce91e74c JH |
790 | { "externally_visible", 0, 0, true, false, false, |
791 | handle_externally_visible_attribute }, | |
349ae713 NB |
792 | /* The same comments as for noreturn attributes apply to const ones. */ |
793 | { "const", 0, 0, true, false, false, | |
794 | handle_const_attribute }, | |
795 | { "transparent_union", 0, 0, false, false, false, | |
796 | handle_transparent_union_attribute }, | |
fc8600f9 | 797 | { "constructor", 0, 1, true, false, false, |
349ae713 | 798 | handle_constructor_attribute }, |
fc8600f9 | 799 | { "destructor", 0, 1, true, false, false, |
349ae713 NB |
800 | handle_destructor_attribute }, |
801 | { "mode", 1, 1, false, true, false, | |
802 | handle_mode_attribute }, | |
803 | { "section", 1, 1, true, false, false, | |
804 | handle_section_attribute }, | |
805 | { "aligned", 0, 1, false, false, false, | |
806 | handle_aligned_attribute }, | |
807 | { "weak", 0, 0, true, false, false, | |
808 | handle_weak_attribute }, | |
809 | { "alias", 1, 1, true, false, false, | |
810 | handle_alias_attribute }, | |
a0203ca7 AO |
811 | { "weakref", 0, 1, true, false, false, |
812 | handle_weakref_attribute }, | |
349ae713 NB |
813 | { "no_instrument_function", 0, 0, true, false, false, |
814 | handle_no_instrument_function_attribute }, | |
815 | { "malloc", 0, 0, true, false, false, | |
816 | handle_malloc_attribute }, | |
6e9a3221 AN |
817 | { "returns_twice", 0, 0, true, false, false, |
818 | handle_returns_twice_attribute }, | |
349ae713 NB |
819 | { "no_stack_limit", 0, 0, true, false, false, |
820 | handle_no_limit_stack_attribute }, | |
821 | { "pure", 0, 0, true, false, false, | |
822 | handle_pure_attribute }, | |
dcd6de6d ZD |
823 | /* For internal use (marking of builtins) only. The name contains space |
824 | to prevent its usage in source code. */ | |
825 | { "no vops", 0, 0, true, false, false, | |
826 | handle_novops_attribute }, | |
349ae713 NB |
827 | { "deprecated", 0, 0, false, false, false, |
828 | handle_deprecated_attribute }, | |
829 | { "vector_size", 1, 1, false, true, false, | |
830 | handle_vector_size_attribute }, | |
d7afec4b | 831 | { "visibility", 1, 1, false, false, false, |
349ae713 | 832 | handle_visibility_attribute }, |
dce81a1a JJ |
833 | { "tls_model", 1, 1, true, false, false, |
834 | handle_tls_model_attribute }, | |
b34c7881 JT |
835 | { "nonnull", 0, -1, false, true, true, |
836 | handle_nonnull_attribute }, | |
39f2f3c8 RS |
837 | { "nothrow", 0, 0, true, false, false, |
838 | handle_nothrow_attribute }, | |
d18b1ed8 | 839 | { "may_alias", 0, 0, false, true, false, NULL }, |
0bfa5f65 RH |
840 | { "cleanup", 1, 1, true, false, false, |
841 | handle_cleanup_attribute }, | |
72954a4f JM |
842 | { "warn_unused_result", 0, 0, false, true, true, |
843 | handle_warn_unused_result_attribute }, | |
254986c7 | 844 | { "sentinel", 0, 1, false, true, true, |
3d091dac | 845 | handle_sentinel_attribute }, |
b5d32c25 KG |
846 | /* For internal use (marking of builtins) only. The name contains space |
847 | to prevent its usage in source code. */ | |
848 | { "type generic", 0, 0, false, true, true, | |
849 | handle_type_generic_attribute }, | |
51bc54a6 DM |
850 | { "alloc_size", 1, 2, false, true, true, |
851 | handle_alloc_size_attribute }, | |
52bf96d2 JH |
852 | { "cold", 0, 0, true, false, false, |
853 | handle_cold_attribute }, | |
854 | { "hot", 0, 0, true, false, false, | |
855 | handle_hot_attribute }, | |
d2af6a68 JJ |
856 | { "warning", 1, 1, true, false, false, |
857 | handle_error_attribute }, | |
858 | { "error", 1, 1, true, false, false, | |
859 | handle_error_attribute }, | |
349ae713 NB |
860 | { NULL, 0, 0, false, false, false, NULL } |
861 | }; | |
862 | ||
863 | /* Give the specifications for the format attributes, used by C and all | |
95bd1dd7 | 864 | descendants. */ |
349ae713 NB |
865 | |
866 | const struct attribute_spec c_common_format_attribute_table[] = | |
867 | { | |
868 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ | |
869 | { "format", 3, 3, false, true, true, | |
870 | handle_format_attribute }, | |
871 | { "format_arg", 1, 1, false, true, true, | |
872 | handle_format_arg_attribute }, | |
873 | { NULL, 0, 0, false, false, false, NULL } | |
874 | }; | |
875 | ||
ec5c56db | 876 | /* Push current bindings for the function name VAR_DECLS. */ |
7da551a2 RS |
877 | |
878 | void | |
35b1a6fa | 879 | start_fname_decls (void) |
7da551a2 | 880 | { |
0ba8a114 NS |
881 | unsigned ix; |
882 | tree saved = NULL_TREE; | |
35b1a6fa | 883 | |
0ba8a114 NS |
884 | for (ix = 0; fname_vars[ix].decl; ix++) |
885 | { | |
886 | tree decl = *fname_vars[ix].decl; | |
7da551a2 | 887 | |
0ba8a114 NS |
888 | if (decl) |
889 | { | |
7d60be94 | 890 | saved = tree_cons (decl, build_int_cst (NULL_TREE, ix), saved); |
0ba8a114 NS |
891 | *fname_vars[ix].decl = NULL_TREE; |
892 | } | |
893 | } | |
894 | if (saved || saved_function_name_decls) | |
895 | /* Normally they'll have been NULL, so only push if we've got a | |
896 | stack, or they are non-NULL. */ | |
897 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
898 | saved_function_name_decls); | |
899 | } | |
900 | ||
325c3691 RH |
901 | /* Finish up the current bindings, adding them into the current function's |
902 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
903 | If there is no current function, we must be at file scope and no statements | |
904 | are involved. Pop the previous bindings. */ | |
0ba8a114 NS |
905 | |
906 | void | |
35b1a6fa | 907 | finish_fname_decls (void) |
0ba8a114 NS |
908 | { |
909 | unsigned ix; | |
325c3691 | 910 | tree stmts = NULL_TREE; |
0ba8a114 NS |
911 | tree stack = saved_function_name_decls; |
912 | ||
913 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
325c3691 | 914 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
35b1a6fa | 915 | |
325c3691 | 916 | if (stmts) |
0ba8a114 | 917 | { |
325c3691 | 918 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
bfaba7a9 | 919 | |
325c3691 RH |
920 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
921 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
6cce57b0 | 922 | |
86ad3aa9 | 923 | append_to_statement_list_force (*bodyp, &stmts); |
325c3691 | 924 | *bodyp = stmts; |
0ba8a114 | 925 | } |
35b1a6fa | 926 | |
0ba8a114 NS |
927 | for (ix = 0; fname_vars[ix].decl; ix++) |
928 | *fname_vars[ix].decl = NULL_TREE; | |
35b1a6fa | 929 | |
0ba8a114 | 930 | if (stack) |
7da551a2 | 931 | { |
ec5c56db | 932 | /* We had saved values, restore them. */ |
0ba8a114 NS |
933 | tree saved; |
934 | ||
935 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
936 | { | |
937 | tree decl = TREE_PURPOSE (saved); | |
938 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); | |
35b1a6fa | 939 | |
0ba8a114 NS |
940 | *fname_vars[ix].decl = decl; |
941 | } | |
942 | stack = TREE_CHAIN (stack); | |
7da551a2 | 943 | } |
0ba8a114 NS |
944 | saved_function_name_decls = stack; |
945 | } | |
946 | ||
6cce57b0 | 947 | /* Return the text name of the current function, suitably prettified |
0d0bc036 | 948 | by PRETTY_P. Return string must be freed by caller. */ |
0ba8a114 NS |
949 | |
950 | const char * | |
35b1a6fa | 951 | fname_as_string (int pretty_p) |
0ba8a114 | 952 | { |
47ab33b2 | 953 | const char *name = "top level"; |
0d0bc036 | 954 | char *namep; |
46c2514e TT |
955 | int vrb = 2, len; |
956 | cpp_string cstr = { 0, 0 }, strname; | |
47ab33b2 | 957 | |
3f75a254 | 958 | if (!pretty_p) |
47ab33b2 MA |
959 | { |
960 | name = ""; | |
961 | vrb = 0; | |
962 | } | |
963 | ||
964 | if (current_function_decl) | |
ae2bcd98 | 965 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
47ab33b2 | 966 | |
46c2514e | 967 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
0d0bc036 | 968 | |
46c2514e TT |
969 | namep = XNEWVEC (char, len); |
970 | snprintf (namep, len, "\"%s\"", name); | |
971 | strname.text = (unsigned char *) namep; | |
972 | strname.len = len - 1; | |
0d0bc036 | 973 | |
b6baa67d | 974 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
46c2514e TT |
975 | { |
976 | XDELETEVEC (namep); | |
977 | return (const char *) cstr.text; | |
0d0bc036 | 978 | } |
0d0bc036 AH |
979 | |
980 | return namep; | |
0ba8a114 NS |
981 | } |
982 | ||
3c79fa86 AP |
983 | /* Expand DECL if it declares an entity not handled by the |
984 | common code. */ | |
985 | ||
986 | int | |
987 | c_expand_decl (tree decl) | |
988 | { | |
989 | if (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl)) | |
990 | { | |
991 | /* Let the back-end know about this variable. */ | |
992 | if (!anon_aggr_type_p (TREE_TYPE (decl))) | |
c22cacf3 | 993 | emit_local_var (decl); |
3c79fa86 | 994 | else |
c22cacf3 MS |
995 | expand_anon_union_decl (decl, NULL_TREE, |
996 | DECL_ANON_UNION_ELEMS (decl)); | |
3c79fa86 | 997 | } |
3c79fa86 AP |
998 | else |
999 | return 0; | |
1000 | ||
1001 | return 1; | |
1002 | } | |
1003 | ||
1004 | ||
0ba8a114 NS |
1005 | /* Return the VAR_DECL for a const char array naming the current |
1006 | function. If the VAR_DECL has not yet been created, create it | |
1007 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
1008 | ID is its name (unfortunately C and C++ hold the RID values of | |
1009 | keywords in different places, so we can't derive RID from ID in | |
f63d1bf7 | 1010 | this language independent code. */ |
0ba8a114 NS |
1011 | |
1012 | tree | |
35b1a6fa | 1013 | fname_decl (unsigned int rid, tree id) |
0ba8a114 NS |
1014 | { |
1015 | unsigned ix; | |
1016 | tree decl = NULL_TREE; | |
1017 | ||
1018 | for (ix = 0; fname_vars[ix].decl; ix++) | |
1019 | if (fname_vars[ix].rid == rid) | |
1020 | break; | |
1021 | ||
1022 | decl = *fname_vars[ix].decl; | |
1023 | if (!decl) | |
7da551a2 | 1024 | { |
8d3e27d1 DJ |
1025 | /* If a tree is built here, it would normally have the lineno of |
1026 | the current statement. Later this tree will be moved to the | |
1027 | beginning of the function and this line number will be wrong. | |
1028 | To avoid this problem set the lineno to 0 here; that prevents | |
4b7e68e7 | 1029 | it from appearing in the RTL. */ |
325c3691 | 1030 | tree stmts; |
3c20847b | 1031 | location_t saved_location = input_location; |
3c20847b | 1032 | input_location = UNKNOWN_LOCATION; |
35b1a6fa | 1033 | |
325c3691 | 1034 | stmts = push_stmt_list (); |
0ba8a114 | 1035 | decl = (*make_fname_decl) (id, fname_vars[ix].pretty); |
325c3691 RH |
1036 | stmts = pop_stmt_list (stmts); |
1037 | if (!IS_EMPTY_STMT (stmts)) | |
1038 | saved_function_name_decls | |
1039 | = tree_cons (decl, stmts, saved_function_name_decls); | |
0ba8a114 | 1040 | *fname_vars[ix].decl = decl; |
3c20847b | 1041 | input_location = saved_location; |
7da551a2 | 1042 | } |
0ba8a114 | 1043 | if (!ix && !current_function_decl) |
8b17a9d6 | 1044 | pedwarn ("%qD is not defined outside of function scope", decl); |
6cce57b0 | 1045 | |
0ba8a114 | 1046 | return decl; |
7da551a2 RS |
1047 | } |
1048 | ||
b84a3874 | 1049 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b30f223b RS |
1050 | |
1051 | tree | |
35b1a6fa | 1052 | fix_string_type (tree value) |
b30f223b | 1053 | { |
b84a3874 RH |
1054 | int length = TREE_STRING_LENGTH (value); |
1055 | int nchars; | |
c162c75e MA |
1056 | tree e_type, i_type, a_type; |
1057 | ||
b57062ca | 1058 | /* Compute the number of elements, for the array type. */ |
b6baa67d KVH |
1059 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
1060 | { | |
1061 | nchars = length; | |
1062 | e_type = char_type_node; | |
1063 | } | |
1064 | else if (TREE_TYPE (value) == char16_array_type_node) | |
1065 | { | |
1066 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
1067 | e_type = char16_type_node; | |
1068 | } | |
1069 | else if (TREE_TYPE (value) == char32_array_type_node) | |
1070 | { | |
1071 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
1072 | e_type = char32_type_node; | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
1077 | e_type = wchar_type_node; | |
1078 | } | |
b30f223b | 1079 | |
89a42ac8 ZW |
1080 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
1081 | limit in C++98 Annex B is very large (65536) and is not normative, | |
1082 | so we do not diagnose it (warn_overlength_strings is forced off | |
1083 | in c_common_post_options). */ | |
1084 | if (warn_overlength_strings) | |
1085 | { | |
1086 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
1087 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
1088 | if (nchars - 1 > nchars_max) | |
1089 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
1090 | separate the %d from the 'C'. 'ISO' should not be | |
1091 | translated, but it may be moved after 'C%d' in languages | |
1092 | where modifiers follow nouns. */ | |
1093 | pedwarn ("string length %qd is greater than the length %qd " | |
1094 | "ISO C%d compilers are required to support", | |
1095 | nchars - 1, nchars_max, relevant_std); | |
1096 | } | |
1326a48b | 1097 | |
cfb10bd3 GDR |
1098 | /* Create the array type for the string constant. The ISO C++ |
1099 | standard says that a string literal has type `const char[N]' or | |
1100 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
1101 | front-end with -Wwrite-strings. | |
1102 | ??? We should change the type of an expression depending on the | |
1103 | state of a warning flag. We should just be warning -- see how | |
1104 | this is handled in the C++ front-end for the deprecated implicit | |
1105 | conversion from string literals to `char*' or `wchar_t*'. | |
c162c75e MA |
1106 | |
1107 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
1108 | array type being the unqualified version of that type. | |
1109 | Therefore, if we are constructing an array of const char, we must | |
1110 | construct the matching unqualified array type first. The C front | |
1111 | end does not require this, but it does no harm, so we do it | |
1112 | unconditionally. */ | |
7d60be94 | 1113 | i_type = build_index_type (build_int_cst (NULL_TREE, nchars - 1)); |
c162c75e | 1114 | a_type = build_array_type (e_type, i_type); |
cfb10bd3 | 1115 | if (c_dialect_cxx() || warn_write_strings) |
46df2823 | 1116 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
d9cf7c82 | 1117 | |
c162c75e | 1118 | TREE_TYPE (value) = a_type; |
ccd4c832 | 1119 | TREE_CONSTANT (value) = 1; |
3521b33c | 1120 | TREE_READONLY (value) = 1; |
b30f223b RS |
1121 | TREE_STATIC (value) = 1; |
1122 | return value; | |
1123 | } | |
1124 | \f | |
d74154d5 RS |
1125 | /* Print a warning if a constant expression had overflow in folding. |
1126 | Invoke this function on every expression that the language | |
1127 | requires to be a constant expression. | |
1128 | Note the ANSI C standard says it is erroneous for a | |
1129 | constant expression to overflow. */ | |
96571883 BK |
1130 | |
1131 | void | |
35b1a6fa | 1132 | constant_expression_warning (tree value) |
393eda6a MLI |
1133 | { |
1134 | if (warn_overflow && pedantic | |
1135 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST | |
1136 | || TREE_CODE (value) == FIXED_CST | |
1137 | || TREE_CODE (value) == VECTOR_CST | |
1138 | || TREE_CODE (value) == COMPLEX_CST) | |
1139 | && TREE_OVERFLOW (value)) | |
1140 | pedwarn ("overflow in constant expression"); | |
1141 | } | |
1142 | ||
1143 | /* The same as above but print an unconditional error. */ | |
1144 | void | |
1145 | constant_expression_error (tree value) | |
96571883 | 1146 | { |
c05f751c | 1147 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
ab22c1fa | 1148 | || TREE_CODE (value) == FIXED_CST |
69ef87e2 | 1149 | || TREE_CODE (value) == VECTOR_CST |
c05f751c | 1150 | || TREE_CODE (value) == COMPLEX_CST) |
393eda6a MLI |
1151 | && TREE_OVERFLOW (value)) |
1152 | error ("overflow in constant expression"); | |
d74154d5 RS |
1153 | } |
1154 | ||
59c0753d MLI |
1155 | /* Print a warning if an expression had overflow in folding and its |
1156 | operands hadn't. | |
1157 | ||
d74154d5 RS |
1158 | Invoke this function on every expression that |
1159 | (1) appears in the source code, and | |
59c0753d | 1160 | (2) is a constant expression that overflowed, and |
d74154d5 | 1161 | (3) is not already checked by convert_and_check; |
59c0753d MLI |
1162 | however, do not invoke this function on operands of explicit casts |
1163 | or when the expression is the result of an operator and any operand | |
1164 | already overflowed. */ | |
d74154d5 RS |
1165 | |
1166 | void | |
35b1a6fa | 1167 | overflow_warning (tree value) |
d74154d5 | 1168 | { |
59c0753d MLI |
1169 | if (skip_evaluation) return; |
1170 | ||
1171 | switch (TREE_CODE (value)) | |
69ef87e2 | 1172 | { |
59c0753d MLI |
1173 | case INTEGER_CST: |
1174 | warning (OPT_Woverflow, "integer overflow in expression"); | |
1175 | break; | |
1176 | ||
1177 | case REAL_CST: | |
1178 | warning (OPT_Woverflow, "floating point overflow in expression"); | |
1179 | break; | |
1180 | ||
ab22c1fa CF |
1181 | case FIXED_CST: |
1182 | warning (OPT_Woverflow, "fixed-point overflow in expression"); | |
1183 | break; | |
1184 | ||
59c0753d MLI |
1185 | case VECTOR_CST: |
1186 | warning (OPT_Woverflow, "vector overflow in expression"); | |
1187 | break; | |
1188 | ||
1189 | case COMPLEX_CST: | |
1190 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
1191 | warning (OPT_Woverflow, "complex integer overflow in expression"); | |
1192 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) | |
1193 | warning (OPT_Woverflow, "complex floating point overflow in expression"); | |
1194 | break; | |
1195 | ||
1196 | default: | |
1197 | break; | |
69ef87e2 | 1198 | } |
d74154d5 RS |
1199 | } |
1200 | ||
63a08740 DM |
1201 | |
1202 | /* Warn about use of a logical || / && operator being used in a | |
1203 | context where it is likely that the bitwise equivalent was intended | |
1204 | by the programmer. CODE is the TREE_CODE of the operator, ARG1 | |
1205 | and ARG2 the arguments. */ | |
1206 | ||
1207 | void | |
1208 | warn_logical_operator (enum tree_code code, tree arg1, tree | |
1209 | arg2) | |
1210 | { | |
1211 | switch (code) | |
1212 | { | |
1213 | case TRUTH_ANDIF_EXPR: | |
1214 | case TRUTH_ORIF_EXPR: | |
1215 | case TRUTH_OR_EXPR: | |
1216 | case TRUTH_AND_EXPR: | |
89132ebc DM |
1217 | if (!TREE_NO_WARNING (arg1) |
1218 | && INTEGRAL_TYPE_P (TREE_TYPE (arg1)) | |
1219 | && !CONSTANT_CLASS_P (arg1) | |
1220 | && TREE_CODE (arg2) == INTEGER_CST | |
1221 | && !integer_zerop (arg2)) | |
1222 | { | |
1223 | warning (OPT_Wlogical_op, | |
1224 | "logical %<%s%> with non-zero constant " | |
1225 | "will always evaluate as true", | |
1226 | ((code == TRUTH_ANDIF_EXPR) | |
1227 | || (code == TRUTH_AND_EXPR)) ? "&&" : "||"); | |
1228 | TREE_NO_WARNING (arg1) = true; | |
1229 | } | |
1230 | break; | |
63a08740 | 1231 | default: |
89132ebc | 1232 | break; |
63a08740 DM |
1233 | } |
1234 | } | |
1235 | ||
1236 | ||
de9c56a4 RG |
1237 | /* Print a warning about casts that might indicate violation |
1238 | of strict aliasing rules if -Wstrict-aliasing is used and | |
3f0a2a47 DM |
1239 | strict aliasing mode is in effect. OTYPE is the original |
1240 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
de9c56a4 | 1241 | |
79bedddc | 1242 | bool |
3f0a2a47 | 1243 | strict_aliasing_warning (tree otype, tree type, tree expr) |
de9c56a4 | 1244 | { |
79bedddc SR |
1245 | if (!(flag_strict_aliasing && POINTER_TYPE_P (type) |
1246 | && POINTER_TYPE_P (otype) && !VOID_TYPE_P (TREE_TYPE (type)))) | |
1247 | return false; | |
1248 | ||
1249 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
de9c56a4 | 1250 | && (DECL_P (TREE_OPERAND (expr, 0)) |
79bedddc | 1251 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
de9c56a4 RG |
1252 | { |
1253 | /* Casting the address of an object to non void pointer. Warn | |
1254 | if the cast breaks type based aliasing. */ | |
79bedddc SR |
1255 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
1256 | { | |
1257 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
1258 | "might break strict-aliasing rules"); | |
1259 | return true; | |
1260 | } | |
de9c56a4 RG |
1261 | else |
1262 | { | |
79bedddc SR |
1263 | /* warn_strict_aliasing >= 3. This includes the default (3). |
1264 | Only warn if the cast is dereferenced immediately. */ | |
4862826d | 1265 | alias_set_type set1 = |
79bedddc | 1266 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
4862826d | 1267 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
de9c56a4 | 1268 | |
4653cae5 RG |
1269 | if (set1 != set2 && set2 != 0 |
1270 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
79bedddc SR |
1271 | { |
1272 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1273 | "pointer will break strict-aliasing rules"); | |
1274 | return true; | |
1275 | } | |
1276 | else if (warn_strict_aliasing == 2 | |
836f7794 | 1277 | && !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
1278 | { |
1279 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1280 | "pointer might break strict-aliasing rules"); | |
1281 | return true; | |
1282 | } | |
de9c56a4 RG |
1283 | } |
1284 | } | |
79bedddc SR |
1285 | else |
1286 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
1287 | { | |
1288 | /* At this level, warn for any conversions, even if an address is | |
1289 | not taken in the same statement. This will likely produce many | |
1290 | false positives, but could be useful to pinpoint problems that | |
1291 | are not revealed at higher levels. */ | |
4862826d ILT |
1292 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
1293 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
1294 | if (!COMPLETE_TYPE_P (type) | |
836f7794 | 1295 | || !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
1296 | { |
1297 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1298 | "pointer might break strict-aliasing rules"); | |
1299 | return true; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | return false; | |
de9c56a4 RG |
1304 | } |
1305 | ||
74ac79fa DM |
1306 | /* Print a warning about if (); or if () .. else; constructs |
1307 | via the special empty statement node that we create. INNER_THEN | |
1308 | and INNER_ELSE are the statement lists of the if and the else | |
1309 | block. */ | |
1310 | ||
1311 | void | |
62e00e94 | 1312 | empty_if_body_warning (tree inner_then, tree inner_else) |
74ac79fa | 1313 | { |
62e00e94 DM |
1314 | if (TREE_CODE (inner_then) == STATEMENT_LIST |
1315 | && STATEMENT_LIST_TAIL (inner_then)) | |
1316 | inner_then = STATEMENT_LIST_TAIL (inner_then)->stmt; | |
1317 | ||
1318 | if (inner_else && TREE_CODE (inner_else) == STATEMENT_LIST | |
1319 | && STATEMENT_LIST_TAIL (inner_else)) | |
1320 | inner_else = STATEMENT_LIST_TAIL (inner_else)->stmt; | |
1321 | ||
1322 | if (IS_EMPTY_STMT (inner_then) && !inner_else) | |
1323 | warning (OPT_Wempty_body, "%Hsuggest braces around empty body " | |
1324 | "in an %<if%> statement", EXPR_LOCUS (inner_then)); | |
1325 | ||
1326 | else if (inner_else && IS_EMPTY_STMT (inner_else)) | |
1327 | warning (OPT_Wempty_body, "%Hsuggest braces around empty body " | |
1328 | "in an %<else%> statement", EXPR_LOCUS (inner_else)); | |
74ac79fa DM |
1329 | } |
1330 | ||
a1e45ff0 DM |
1331 | /* Warn for unlikely, improbable, or stupid DECL declarations |
1332 | of `main'. */ | |
1333 | ||
1334 | void | |
1335 | check_main_parameter_types (tree decl) | |
1336 | { | |
1337 | tree args; | |
1338 | int argct = 0; | |
1339 | ||
1340 | for (args = TYPE_ARG_TYPES (TREE_TYPE (decl)); args; | |
1341 | args = TREE_CHAIN (args)) | |
1342 | { | |
1343 | tree type = args ? TREE_VALUE (args) : 0; | |
1344 | ||
d8e1d619 | 1345 | if (type == void_type_node || type == error_mark_node ) |
a1e45ff0 DM |
1346 | break; |
1347 | ||
1348 | ++argct; | |
1349 | switch (argct) | |
1350 | { | |
1351 | case 1: | |
1352 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
1353 | pedwarn ("first argument of %q+D should be %<int%>", decl); | |
1354 | break; | |
1355 | ||
1356 | case 2: | |
1357 | if (TREE_CODE (type) != POINTER_TYPE | |
1358 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1359 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1360 | != char_type_node)) | |
1361 | pedwarn ("second argument of %q+D should be %<char **%>", | |
1362 | decl); | |
1363 | break; | |
1364 | ||
1365 | case 3: | |
1366 | if (TREE_CODE (type) != POINTER_TYPE | |
1367 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1368 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1369 | != char_type_node)) | |
1370 | pedwarn ("third argument of %q+D should probably be " | |
1371 | "%<char **%>", decl); | |
1372 | break; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | /* It is intentional that this message does not mention the third | |
1377 | argument because it's only mentioned in an appendix of the | |
1378 | standard. */ | |
1379 | if (argct > 0 && (argct < 2 || argct > 3)) | |
1380 | pedwarn ("%q+D takes only zero or two arguments", decl); | |
1381 | } | |
1382 | ||
f83c7f63 DJ |
1383 | /* True if pointers to distinct types T1 and T2 can be converted to |
1384 | each other without an explicit cast. Only returns true for opaque | |
1385 | vector types. */ | |
1386 | bool | |
1387 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
1388 | { | |
1389 | if (TREE_CODE (t1) == VECTOR_TYPE && TREE_CODE (t2) == VECTOR_TYPE | |
1390 | && (targetm.vector_opaque_p (t1) || targetm.vector_opaque_p (t2)) | |
1391 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) | |
1392 | return true; | |
1393 | ||
1394 | return false; | |
1395 | } | |
1396 | ||
00c8e9f6 MS |
1397 | /* True if vector types T1 and T2 can be converted to each other |
1398 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
1399 | can only be converted with -flax-vector-conversions yet that is not | |
1400 | in effect, emit a note telling the user about that option if such | |
1401 | a note has not previously been emitted. */ | |
1402 | bool | |
58f9752a | 1403 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
cc27e657 | 1404 | { |
00c8e9f6 | 1405 | static bool emitted_lax_note = false; |
14e765da JM |
1406 | bool convertible_lax; |
1407 | ||
1408 | if ((targetm.vector_opaque_p (t1) || targetm.vector_opaque_p (t2)) | |
1409 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) | |
1410 | return true; | |
1411 | ||
1412 | convertible_lax = | |
1413 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
1414 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
1415 | TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
1416 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) | |
1417 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
00c8e9f6 MS |
1418 | |
1419 | if (!convertible_lax || flag_lax_vector_conversions) | |
1420 | return convertible_lax; | |
1421 | ||
1422 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
cf7bc668 | 1423 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
00c8e9f6 MS |
1424 | return true; |
1425 | ||
1426 | if (emit_lax_note && !emitted_lax_note) | |
1427 | { | |
1428 | emitted_lax_note = true; | |
1429 | inform ("use -flax-vector-conversions to permit " | |
1430 | "conversions between vectors with differing " | |
1431 | "element types or numbers of subparts"); | |
1432 | } | |
1433 | ||
1434 | return false; | |
cc27e657 PB |
1435 | } |
1436 | ||
422c3a54 | 1437 | /* Warns if the conversion of EXPR to TYPE may alter a value. |
07231d4f | 1438 | This is a helper function for warnings_for_convert_and_check. */ |
422c3a54 MLI |
1439 | |
1440 | static void | |
1441 | conversion_warning (tree type, tree expr) | |
1442 | { | |
1443 | bool give_warning = false; | |
1444 | ||
1445 | unsigned int formal_prec = TYPE_PRECISION (type); | |
1446 | ||
7060db96 MLI |
1447 | if (!warn_conversion && !warn_sign_conversion) |
1448 | return; | |
1449 | ||
422c3a54 MLI |
1450 | if (TREE_CODE (expr) == REAL_CST || TREE_CODE (expr) == INTEGER_CST) |
1451 | { | |
1452 | /* Warn for real constant that is not an exact integer converted | |
1453 | to integer type. */ | |
1454 | if (TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE | |
1455 | && TREE_CODE (type) == INTEGER_TYPE) | |
1456 | { | |
1457 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (TREE_TYPE (expr)))) | |
1458 | give_warning = true; | |
1459 | } | |
91c41804 | 1460 | /* Warn for an integer constant that does not fit into integer type. */ |
422c3a54 MLI |
1461 | else if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE |
1462 | && TREE_CODE (type) == INTEGER_TYPE | |
91c41804 RS |
1463 | && !int_fits_type_p (expr, type)) |
1464 | { | |
1465 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (TREE_TYPE (expr))) | |
7060db96 MLI |
1466 | warning (OPT_Wsign_conversion, |
1467 | "negative integer implicitly converted to unsigned type"); | |
1468 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (TREE_TYPE (expr))) | |
1469 | warning (OPT_Wsign_conversion, | |
1470 | "conversion of unsigned constant value to negative integer"); | |
1471 | else | |
1472 | give_warning = true; | |
91c41804 | 1473 | } |
422c3a54 MLI |
1474 | else if (TREE_CODE (type) == REAL_TYPE) |
1475 | { | |
1476 | /* Warn for an integer constant that does not fit into real type. */ | |
1477 | if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE) | |
1478 | { | |
1479 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
1480 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1481 | give_warning = true; | |
1482 | } | |
1483 | /* Warn for a real constant that does not fit into a smaller | |
1484 | real type. */ | |
1485 | else if (TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE | |
1486 | && formal_prec < TYPE_PRECISION (TREE_TYPE (expr))) | |
1487 | { | |
1488 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
1489 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1490 | give_warning = true; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | if (give_warning) | |
1495 | warning (OPT_Wconversion, | |
1496 | "conversion to %qT alters %qT constant value", | |
1497 | type, TREE_TYPE (expr)); | |
1498 | } | |
1499 | else /* 'expr' is not a constant. */ | |
1500 | { | |
1501 | /* Warn for real types converted to integer types. */ | |
1502 | if (TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE | |
1503 | && TREE_CODE (type) == INTEGER_TYPE) | |
1504 | give_warning = true; | |
1505 | ||
1506 | else if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE | |
1507 | && TREE_CODE (type) == INTEGER_TYPE) | |
1508 | { | |
cfdaefec | 1509 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
c00e8b06 | 1510 | expr = get_unwidened (expr, 0); |
cfdaefec | 1511 | |
422c3a54 | 1512 | /* Warn for integer types converted to smaller integer types. */ |
7060db96 MLI |
1513 | if (formal_prec < TYPE_PRECISION (TREE_TYPE (expr))) |
1514 | give_warning = true; | |
1515 | ||
1516 | /* When they are the same width but different signedness, | |
1517 | then the value may change. */ | |
1518 | else if ((formal_prec == TYPE_PRECISION (TREE_TYPE (expr)) | |
c00e8b06 | 1519 | && TYPE_UNSIGNED (TREE_TYPE (expr)) != TYPE_UNSIGNED (type)) |
7060db96 MLI |
1520 | /* Even when converted to a bigger type, if the type is |
1521 | unsigned but expr is signed, then negative values | |
1522 | will be changed. */ | |
c00e8b06 MLI |
1523 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (TREE_TYPE (expr)))) |
1524 | warning (OPT_Wsign_conversion, | |
1525 | "conversion to %qT from %qT may change the sign of the result", | |
1526 | type, TREE_TYPE (expr)); | |
422c3a54 MLI |
1527 | } |
1528 | ||
1529 | /* Warn for integer types converted to real types if and only if | |
1530 | all the range of values of the integer type cannot be | |
1531 | represented by the real type. */ | |
1532 | else if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE | |
1533 | && TREE_CODE (type) == REAL_TYPE) | |
1534 | { | |
1535 | tree type_low_bound = TYPE_MIN_VALUE (TREE_TYPE (expr)); | |
1536 | tree type_high_bound = TYPE_MAX_VALUE (TREE_TYPE (expr)); | |
1537 | REAL_VALUE_TYPE real_low_bound = real_value_from_int_cst (0, type_low_bound); | |
1538 | REAL_VALUE_TYPE real_high_bound = real_value_from_int_cst (0, type_high_bound); | |
1539 | ||
1540 | if (!exact_real_truncate (TYPE_MODE (type), &real_low_bound) | |
1541 | || !exact_real_truncate (TYPE_MODE (type), &real_high_bound)) | |
1542 | give_warning = true; | |
1543 | } | |
1544 | ||
1545 | /* Warn for real types converted to smaller real types. */ | |
1546 | else if (TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE | |
1547 | && TREE_CODE (type) == REAL_TYPE | |
1548 | && formal_prec < TYPE_PRECISION (TREE_TYPE (expr))) | |
1549 | give_warning = true; | |
1550 | ||
1551 | ||
1552 | if (give_warning) | |
1553 | warning (OPT_Wconversion, | |
1554 | "conversion to %qT from %qT may alter its value", | |
1555 | type, TREE_TYPE (expr)); | |
1556 | } | |
1557 | } | |
1558 | ||
07231d4f MLI |
1559 | /* Produce warnings after a conversion. RESULT is the result of |
1560 | converting EXPR to TYPE. This is a helper function for | |
1561 | convert_and_check and cp_convert_and_check. */ | |
d74154d5 | 1562 | |
07231d4f MLI |
1563 | void |
1564 | warnings_for_convert_and_check (tree type, tree expr, tree result) | |
d74154d5 | 1565 | { |
91c41804 RS |
1566 | if (TREE_CODE (expr) == INTEGER_CST |
1567 | && (TREE_CODE (type) == INTEGER_TYPE | |
1568 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
1569 | && !int_fits_type_p (expr, type)) | |
1570 | { | |
422c3a54 MLI |
1571 | /* Do not diagnose overflow in a constant expression merely |
1572 | because a conversion overflowed. */ | |
91c41804 | 1573 | if (TREE_OVERFLOW (result)) |
d95787e6 RS |
1574 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
1575 | ||
91c41804 | 1576 | if (TYPE_UNSIGNED (type)) |
422c3a54 | 1577 | { |
91c41804 RS |
1578 | /* This detects cases like converting -129 or 256 to |
1579 | unsigned char. */ | |
1580 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
1581 | warning (OPT_Woverflow, | |
1582 | "large integer implicitly truncated to unsigned type"); | |
7060db96 | 1583 | else |
91c41804 RS |
1584 | conversion_warning (type, expr); |
1585 | } | |
12753674 | 1586 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
f73fe417 MLI |
1587 | warning (OPT_Woverflow, |
1588 | "overflow in implicit constant conversion"); | |
1589 | /* No warning for converting 0x80000000 to int. */ | |
1590 | else if (pedantic | |
1591 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
1592 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
1593 | != TYPE_PRECISION (type))) | |
1594 | warning (OPT_Woverflow, | |
1595 | "overflow in implicit constant conversion"); | |
1596 | ||
7060db96 | 1597 | else |
f73fe417 | 1598 | conversion_warning (type, expr); |
d74154d5 | 1599 | } |
ab22c1fa CF |
1600 | else if ((TREE_CODE (result) == INTEGER_CST |
1601 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
91c41804 RS |
1602 | warning (OPT_Woverflow, |
1603 | "overflow in implicit constant conversion"); | |
7060db96 | 1604 | else |
91c41804 | 1605 | conversion_warning (type, expr); |
07231d4f MLI |
1606 | } |
1607 | ||
1608 | ||
1609 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
1610 | Invoke this function on every expression that is converted implicitly, | |
1611 | i.e. because of language rules and not because of an explicit cast. */ | |
1612 | ||
1613 | tree | |
1614 | convert_and_check (tree type, tree expr) | |
1615 | { | |
1616 | tree result; | |
1617 | ||
1618 | if (TREE_TYPE (expr) == type) | |
1619 | return expr; | |
91c41804 | 1620 | |
07231d4f MLI |
1621 | result = convert (type, expr); |
1622 | ||
7060db96 | 1623 | if (!skip_evaluation && !TREE_OVERFLOW_P (expr) && result != error_mark_node) |
07231d4f MLI |
1624 | warnings_for_convert_and_check (type, expr, result); |
1625 | ||
91c41804 | 1626 | return result; |
96571883 BK |
1627 | } |
1628 | \f | |
235cfbc4 BS |
1629 | /* A node in a list that describes references to variables (EXPR), which are |
1630 | either read accesses if WRITER is zero, or write accesses, in which case | |
1631 | WRITER is the parent of EXPR. */ | |
1632 | struct tlist | |
1633 | { | |
1634 | struct tlist *next; | |
1635 | tree expr, writer; | |
1636 | }; | |
1637 | ||
1638 | /* Used to implement a cache the results of a call to verify_tree. We only | |
1639 | use this for SAVE_EXPRs. */ | |
1640 | struct tlist_cache | |
1641 | { | |
1642 | struct tlist_cache *next; | |
1643 | struct tlist *cache_before_sp; | |
1644 | struct tlist *cache_after_sp; | |
1645 | tree expr; | |
2683ed8d BS |
1646 | }; |
1647 | ||
235cfbc4 BS |
1648 | /* Obstack to use when allocating tlist structures, and corresponding |
1649 | firstobj. */ | |
1650 | static struct obstack tlist_obstack; | |
1651 | static char *tlist_firstobj = 0; | |
1652 | ||
1653 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
1654 | warnings. */ | |
1655 | static struct tlist *warned_ids; | |
1656 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
1657 | cache the results. */ | |
1658 | static struct tlist_cache *save_expr_cache; | |
1659 | ||
35b1a6fa AJ |
1660 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
1661 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
1662 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
1663 | static int warning_candidate_p (tree); | |
1664 | static void warn_for_collisions (struct tlist *); | |
1665 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
1666 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
2683ed8d | 1667 | |
235cfbc4 BS |
1668 | /* Create a new struct tlist and fill in its fields. */ |
1669 | static struct tlist * | |
35b1a6fa | 1670 | new_tlist (struct tlist *next, tree t, tree writer) |
235cfbc4 BS |
1671 | { |
1672 | struct tlist *l; | |
5d038c4c | 1673 | l = XOBNEW (&tlist_obstack, struct tlist); |
235cfbc4 BS |
1674 | l->next = next; |
1675 | l->expr = t; | |
1676 | l->writer = writer; | |
1677 | return l; | |
1678 | } | |
1679 | ||
1680 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
1681 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
1682 | ||
1683 | static void | |
35b1a6fa | 1684 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
235cfbc4 BS |
1685 | { |
1686 | while (add) | |
1687 | { | |
1688 | struct tlist *next = add->next; | |
3f75a254 | 1689 | if (!copy) |
235cfbc4 | 1690 | add->next = *to; |
3f75a254 | 1691 | if (!exclude_writer || add->writer != exclude_writer) |
235cfbc4 BS |
1692 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
1693 | add = next; | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
1698 | each variable that already exists in TO, no new node is added; however if | |
1699 | there is a write access recorded in ADD, and an occurrence on TO is only | |
1700 | a read access, then the occurrence in TO will be modified to record the | |
1701 | write. */ | |
2683ed8d BS |
1702 | |
1703 | static void | |
35b1a6fa | 1704 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
235cfbc4 BS |
1705 | { |
1706 | struct tlist **end = to; | |
1707 | ||
1708 | while (*end) | |
1709 | end = &(*end)->next; | |
1710 | ||
1711 | while (add) | |
1712 | { | |
1713 | int found = 0; | |
1714 | struct tlist *tmp2; | |
1715 | struct tlist *next = add->next; | |
1716 | ||
1717 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
1718 | if (tmp2->expr == add->expr) | |
1719 | { | |
1720 | found = 1; | |
3f75a254 | 1721 | if (!tmp2->writer) |
235cfbc4 BS |
1722 | tmp2->writer = add->writer; |
1723 | } | |
3f75a254 | 1724 | if (!found) |
235cfbc4 BS |
1725 | { |
1726 | *end = copy ? add : new_tlist (NULL, add->expr, add->writer); | |
1727 | end = &(*end)->next; | |
1728 | *end = 0; | |
1729 | } | |
1730 | add = next; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
1735 | references in list LIST conflict with it, excluding reads if ONLY writers | |
1736 | is nonzero. */ | |
1737 | ||
1738 | static void | |
35b1a6fa AJ |
1739 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
1740 | int only_writes) | |
235cfbc4 BS |
1741 | { |
1742 | struct tlist *tmp; | |
1743 | ||
1744 | /* Avoid duplicate warnings. */ | |
1745 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
1746 | if (tmp->expr == written) | |
1747 | return; | |
1748 | ||
1749 | while (list) | |
1750 | { | |
1751 | if (list->expr == written | |
1752 | && list->writer != writer | |
3f75a254 | 1753 | && (!only_writes || list->writer) |
e3790655 | 1754 | && DECL_NAME (list->expr)) |
235cfbc4 BS |
1755 | { |
1756 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
ffc30173 MLI |
1757 | warning (OPT_Wsequence_point, "operation on %qE may be undefined", |
1758 | list->expr); | |
235cfbc4 BS |
1759 | } |
1760 | list = list->next; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | /* Given a list LIST of references to variables, find whether any of these | |
1765 | can cause conflicts due to missing sequence points. */ | |
1766 | ||
1767 | static void | |
35b1a6fa | 1768 | warn_for_collisions (struct tlist *list) |
235cfbc4 BS |
1769 | { |
1770 | struct tlist *tmp; | |
35b1a6fa | 1771 | |
235cfbc4 BS |
1772 | for (tmp = list; tmp; tmp = tmp->next) |
1773 | { | |
1774 | if (tmp->writer) | |
1775 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
1776 | } | |
1777 | } | |
1778 | ||
684d9f3b | 1779 | /* Return nonzero if X is a tree that can be verified by the sequence point |
235cfbc4 BS |
1780 | warnings. */ |
1781 | static int | |
35b1a6fa | 1782 | warning_candidate_p (tree x) |
2683ed8d | 1783 | { |
235cfbc4 BS |
1784 | return TREE_CODE (x) == VAR_DECL || TREE_CODE (x) == PARM_DECL; |
1785 | } | |
2683ed8d | 1786 | |
235cfbc4 BS |
1787 | /* Walk the tree X, and record accesses to variables. If X is written by the |
1788 | parent tree, WRITER is the parent. | |
1789 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
1790 | expression or its only operand forces a sequence point, then everything up | |
1791 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
1792 | in PNO_SP. | |
1793 | Once we return, we will have emitted warnings if any subexpression before | |
1794 | such a sequence point could be undefined. On a higher level, however, the | |
1795 | sequence point may not be relevant, and we'll merge the two lists. | |
1796 | ||
1797 | Example: (b++, a) + b; | |
1798 | The call that processes the COMPOUND_EXPR will store the increment of B | |
1799 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
1800 | processes the PLUS_EXPR will need to merge the two lists so that | |
1801 | eventually, all accesses end up on the same list (and we'll warn about the | |
1802 | unordered subexpressions b++ and b. | |
1803 | ||
1804 | A note on merging. If we modify the former example so that our expression | |
1805 | becomes | |
1806 | (b++, b) + a | |
1807 | care must be taken not simply to add all three expressions into the final | |
1808 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
1809 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
1810 | way, so that no more than one access to B is recorded. */ | |
2683ed8d | 1811 | |
235cfbc4 | 1812 | static void |
35b1a6fa AJ |
1813 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
1814 | tree writer) | |
235cfbc4 BS |
1815 | { |
1816 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
1817 | enum tree_code code; | |
6615c446 | 1818 | enum tree_code_class cl; |
2683ed8d | 1819 | |
f9e1917e JM |
1820 | /* X may be NULL if it is the operand of an empty statement expression |
1821 | ({ }). */ | |
1822 | if (x == NULL) | |
1823 | return; | |
1824 | ||
235cfbc4 BS |
1825 | restart: |
1826 | code = TREE_CODE (x); | |
e3a64162 | 1827 | cl = TREE_CODE_CLASS (code); |
2683ed8d | 1828 | |
235cfbc4 | 1829 | if (warning_candidate_p (x)) |
2683ed8d | 1830 | { |
235cfbc4 BS |
1831 | *pno_sp = new_tlist (*pno_sp, x, writer); |
1832 | return; | |
1833 | } | |
1834 | ||
1835 | switch (code) | |
1836 | { | |
52a84e42 BS |
1837 | case CONSTRUCTOR: |
1838 | return; | |
1839 | ||
235cfbc4 BS |
1840 | case COMPOUND_EXPR: |
1841 | case TRUTH_ANDIF_EXPR: | |
1842 | case TRUTH_ORIF_EXPR: | |
1843 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
1844 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
1845 | warn_for_collisions (tmp_nosp); | |
1846 | merge_tlist (pbefore_sp, tmp_before, 0); | |
1847 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
1848 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
1849 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
1850 | return; | |
1851 | ||
1852 | case COND_EXPR: | |
1853 | tmp_before = tmp_list2 = 0; | |
1854 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
1855 | warn_for_collisions (tmp_list2); | |
1856 | merge_tlist (pbefore_sp, tmp_before, 0); | |
1857 | merge_tlist (pbefore_sp, tmp_list2, 1); | |
1858 | ||
1859 | tmp_list3 = tmp_nosp = 0; | |
1860 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
1861 | warn_for_collisions (tmp_nosp); | |
1862 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
1863 | ||
1864 | tmp_list3 = tmp_list2 = 0; | |
1865 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
1866 | warn_for_collisions (tmp_list2); | |
1867 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
1868 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
1869 | two first, to avoid warning for (a ? b++ : b++). */ | |
1870 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
1871 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
1872 | return; | |
1873 | ||
2683ed8d BS |
1874 | case PREDECREMENT_EXPR: |
1875 | case PREINCREMENT_EXPR: | |
1876 | case POSTDECREMENT_EXPR: | |
1877 | case POSTINCREMENT_EXPR: | |
235cfbc4 BS |
1878 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
1879 | return; | |
1880 | ||
1881 | case MODIFY_EXPR: | |
1882 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
1883 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
1884 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
1885 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
1886 | in the RHS. Example: | |
1887 | *a = (a++, 2) | |
1888 | Despite the fact that the modification of "a" is in the before_sp | |
1889 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
1890 | We can handle this by adding the contents of tmp_list3 | |
1891 | to those of tmp_before, and redoing the collision warnings for that | |
1892 | list. */ | |
1893 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
1894 | warn_for_collisions (tmp_before); | |
1895 | /* Exclude the LHS itself here; we first have to merge it into the | |
1896 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
1897 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
1898 | as a write. */ | |
1899 | add_tlist (pno_sp, tmp_list3, x, 0); | |
1900 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
1901 | ||
1902 | merge_tlist (pbefore_sp, tmp_before, 0); | |
1903 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
1904 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
1905 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
1906 | return; | |
2683ed8d BS |
1907 | |
1908 | case CALL_EXPR: | |
235cfbc4 BS |
1909 | /* We need to warn about conflicts among arguments and conflicts between |
1910 | args and the function address. Side effects of the function address, | |
1911 | however, are not ordered by the sequence point of the call. */ | |
5039610b SL |
1912 | { |
1913 | call_expr_arg_iterator iter; | |
1914 | tree arg; | |
1915 | tmp_before = tmp_nosp = 0; | |
1916 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
1917 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
1918 | { | |
1919 | tmp_list2 = tmp_list3 = 0; | |
1920 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
1921 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
1922 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
1923 | } | |
1924 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
1925 | warn_for_collisions (tmp_before); | |
1926 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
1927 | return; | |
1928 | } | |
2683ed8d BS |
1929 | |
1930 | case TREE_LIST: | |
1931 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
1932 | while (x) | |
1933 | { | |
235cfbc4 BS |
1934 | tmp_before = tmp_nosp = 0; |
1935 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
1936 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
1937 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2683ed8d BS |
1938 | x = TREE_CHAIN (x); |
1939 | } | |
235cfbc4 | 1940 | return; |
2683ed8d | 1941 | |
235cfbc4 BS |
1942 | case SAVE_EXPR: |
1943 | { | |
1944 | struct tlist_cache *t; | |
1945 | for (t = save_expr_cache; t; t = t->next) | |
1946 | if (t->expr == x) | |
1947 | break; | |
2683ed8d | 1948 | |
3f75a254 | 1949 | if (!t) |
2683ed8d | 1950 | { |
5d038c4c | 1951 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
235cfbc4 BS |
1952 | t->next = save_expr_cache; |
1953 | t->expr = x; | |
1954 | save_expr_cache = t; | |
1955 | ||
1956 | tmp_before = tmp_nosp = 0; | |
1957 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
1958 | warn_for_collisions (tmp_nosp); | |
1959 | ||
1960 | tmp_list3 = 0; | |
1961 | while (tmp_nosp) | |
1962 | { | |
1963 | struct tlist *t = tmp_nosp; | |
1964 | tmp_nosp = t->next; | |
1965 | merge_tlist (&tmp_list3, t, 0); | |
1966 | } | |
1967 | t->cache_before_sp = tmp_before; | |
1968 | t->cache_after_sp = tmp_list3; | |
2683ed8d | 1969 | } |
235cfbc4 BS |
1970 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
1971 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
1972 | return; | |
1973 | } | |
2683ed8d | 1974 | |
6615c446 JO |
1975 | default: |
1976 | /* For other expressions, simply recurse on their operands. | |
c22cacf3 | 1977 | Manual tail recursion for unary expressions. |
6615c446 JO |
1978 | Other non-expressions need not be processed. */ |
1979 | if (cl == tcc_unary) | |
1980 | { | |
6615c446 JO |
1981 | x = TREE_OPERAND (x, 0); |
1982 | writer = 0; | |
1983 | goto restart; | |
1984 | } | |
1985 | else if (IS_EXPR_CODE_CLASS (cl)) | |
1986 | { | |
1987 | int lp; | |
5039610b | 1988 | int max = TREE_OPERAND_LENGTH (x); |
6615c446 JO |
1989 | for (lp = 0; lp < max; lp++) |
1990 | { | |
1991 | tmp_before = tmp_nosp = 0; | |
1992 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
1993 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
1994 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
1995 | } | |
1996 | } | |
1997 | return; | |
2683ed8d | 1998 | } |
2683ed8d BS |
1999 | } |
2000 | ||
8d9afc4e | 2001 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
2683ed8d BS |
2002 | points. */ |
2003 | ||
3a5b9284 | 2004 | void |
35b1a6fa | 2005 | verify_sequence_points (tree expr) |
2683ed8d | 2006 | { |
235cfbc4 | 2007 | struct tlist *before_sp = 0, *after_sp = 0; |
2683ed8d | 2008 | |
235cfbc4 BS |
2009 | warned_ids = 0; |
2010 | save_expr_cache = 0; | |
2011 | if (tlist_firstobj == 0) | |
2683ed8d | 2012 | { |
235cfbc4 | 2013 | gcc_obstack_init (&tlist_obstack); |
28dab132 | 2014 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
2683ed8d BS |
2015 | } |
2016 | ||
235cfbc4 BS |
2017 | verify_tree (expr, &before_sp, &after_sp, 0); |
2018 | warn_for_collisions (after_sp); | |
2019 | obstack_free (&tlist_obstack, tlist_firstobj); | |
2683ed8d | 2020 | } |
b30f223b RS |
2021 | \f |
2022 | /* Validate the expression after `case' and apply default promotions. */ | |
2023 | ||
a6c0a76c | 2024 | static tree |
35b1a6fa | 2025 | check_case_value (tree value) |
b30f223b RS |
2026 | { |
2027 | if (value == NULL_TREE) | |
2028 | return value; | |
2029 | ||
ed248cf7 JM |
2030 | /* ??? Can we ever get nops here for a valid case value? We |
2031 | shouldn't for C. */ | |
8493738b | 2032 | STRIP_TYPE_NOPS (value); |
56cb9733 MM |
2033 | /* In C++, the following is allowed: |
2034 | ||
2035 | const int i = 3; | |
2036 | switch (...) { case i: ... } | |
2037 | ||
2038 | So, we try to reduce the VALUE to a constant that way. */ | |
37fa72e9 | 2039 | if (c_dialect_cxx ()) |
56cb9733 MM |
2040 | { |
2041 | value = decl_constant_value (value); | |
2042 | STRIP_TYPE_NOPS (value); | |
2043 | value = fold (value); | |
2044 | } | |
b30f223b | 2045 | |
522ddfa2 JM |
2046 | if (TREE_CODE (value) == INTEGER_CST) |
2047 | /* Promote char or short to int. */ | |
2048 | value = perform_integral_promotions (value); | |
2049 | else if (value != error_mark_node) | |
b30f223b RS |
2050 | { |
2051 | error ("case label does not reduce to an integer constant"); | |
2052 | value = error_mark_node; | |
2053 | } | |
b30f223b | 2054 | |
bc690db1 RS |
2055 | constant_expression_warning (value); |
2056 | ||
b30f223b RS |
2057 | return value; |
2058 | } | |
2059 | \f | |
a6c0a76c | 2060 | /* See if the case values LOW and HIGH are in the range of the original |
89dbed81 | 2061 | type (i.e. before the default conversion to int) of the switch testing |
a6c0a76c SB |
2062 | expression. |
2063 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
2a7e31df | 2064 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
a6c0a76c SB |
2065 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
2066 | if the case is not a case range. | |
2067 | The caller has to make sure that we are not called with NULL for | |
89dbed81 | 2068 | CASE_LOW_P (i.e. the default case). |
0fa2e4df | 2069 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
a6c0a76c SB |
2070 | untouched) or false if the label is out of range. */ |
2071 | ||
2072 | static bool | |
2073 | check_case_bounds (tree type, tree orig_type, | |
2074 | tree *case_low_p, tree *case_high_p) | |
2075 | { | |
2076 | tree min_value, max_value; | |
2077 | tree case_low = *case_low_p; | |
2078 | tree case_high = case_high_p ? *case_high_p : case_low; | |
2079 | ||
2080 | /* If there was a problem with the original type, do nothing. */ | |
2081 | if (orig_type == error_mark_node) | |
2082 | return true; | |
2083 | ||
2084 | min_value = TYPE_MIN_VALUE (orig_type); | |
2085 | max_value = TYPE_MAX_VALUE (orig_type); | |
2086 | ||
2087 | /* Case label is less than minimum for type. */ | |
2088 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
2089 | && tree_int_cst_compare (case_high, min_value) < 0) | |
2090 | { | |
d4ee4d25 | 2091 | warning (0, "case label value is less than minimum value for type"); |
a6c0a76c SB |
2092 | return false; |
2093 | } | |
9f63daea | 2094 | |
a6c0a76c SB |
2095 | /* Case value is greater than maximum for type. */ |
2096 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
2097 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2098 | { | |
d4ee4d25 | 2099 | warning (0, "case label value exceeds maximum value for type"); |
a6c0a76c SB |
2100 | return false; |
2101 | } | |
2102 | ||
2103 | /* Saturate lower case label value to minimum. */ | |
2104 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
2105 | && tree_int_cst_compare (case_low, min_value) < 0) | |
2106 | { | |
d4ee4d25 | 2107 | warning (0, "lower value in case label range" |
a6c0a76c SB |
2108 | " less than minimum value for type"); |
2109 | case_low = min_value; | |
2110 | } | |
9f63daea | 2111 | |
a6c0a76c SB |
2112 | /* Saturate upper case label value to maximum. */ |
2113 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
2114 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2115 | { | |
d4ee4d25 | 2116 | warning (0, "upper value in case label range" |
a6c0a76c SB |
2117 | " exceeds maximum value for type"); |
2118 | case_high = max_value; | |
2119 | } | |
2120 | ||
2121 | if (*case_low_p != case_low) | |
2122 | *case_low_p = convert (type, case_low); | |
2123 | if (case_high_p && *case_high_p != case_high) | |
2124 | *case_high_p = convert (type, case_high); | |
2125 | ||
2126 | return true; | |
2127 | } | |
2128 | \f | |
b30f223b RS |
2129 | /* Return an integer type with BITS bits of precision, |
2130 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
2131 | ||
2132 | tree | |
35b1a6fa | 2133 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b30f223b | 2134 | { |
a311b52c JM |
2135 | if (bits == TYPE_PRECISION (integer_type_node)) |
2136 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2137 | ||
3fc7e390 | 2138 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b30f223b RS |
2139 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
2140 | ||
3fc7e390 | 2141 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b30f223b RS |
2142 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
2143 | ||
3fc7e390 | 2144 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b30f223b RS |
2145 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
2146 | ||
3fc7e390 | 2147 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b30f223b RS |
2148 | return (unsignedp ? long_long_unsigned_type_node |
2149 | : long_long_integer_type_node); | |
2150 | ||
835f9b4d GRK |
2151 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
2152 | return (unsignedp ? widest_unsigned_literal_type_node | |
2153 | : widest_integer_literal_type_node); | |
2154 | ||
3fc7e390 RS |
2155 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
2156 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2157 | ||
2158 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
2159 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2160 | ||
2161 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
2162 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2163 | ||
2164 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
2165 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2166 | ||
b30f223b RS |
2167 | return 0; |
2168 | } | |
2169 | ||
ab22c1fa CF |
2170 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
2171 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
2172 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
2173 | ||
2174 | tree | |
2175 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
2176 | int unsignedp, int satp) | |
2177 | { | |
2178 | enum machine_mode mode; | |
2179 | if (ibit == 0) | |
2180 | mode = unsignedp ? UQQmode : QQmode; | |
2181 | else | |
2182 | mode = unsignedp ? UHAmode : HAmode; | |
2183 | ||
2184 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
2185 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
2186 | break; | |
2187 | ||
2188 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
2189 | { | |
2190 | sorry ("GCC cannot support operators with integer types and " | |
2191 | "fixed-point types that have too many integral and " | |
2192 | "fractional bits together"); | |
2193 | return 0; | |
2194 | } | |
2195 | ||
2196 | return c_common_type_for_mode (mode, satp); | |
2197 | } | |
2198 | ||
d1d3865f ZW |
2199 | /* Used for communication between c_common_type_for_mode and |
2200 | c_register_builtin_type. */ | |
2201 | static GTY(()) tree registered_builtin_types; | |
2202 | ||
b30f223b RS |
2203 | /* Return a data type that has machine mode MODE. |
2204 | If the mode is an integer, | |
ab22c1fa CF |
2205 | then UNSIGNEDP selects between signed and unsigned types. |
2206 | If the mode is a fixed-point mode, | |
2207 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b30f223b RS |
2208 | |
2209 | tree | |
35b1a6fa | 2210 | c_common_type_for_mode (enum machine_mode mode, int unsignedp) |
b30f223b | 2211 | { |
d1d3865f ZW |
2212 | tree t; |
2213 | ||
a311b52c JM |
2214 | if (mode == TYPE_MODE (integer_type_node)) |
2215 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2216 | ||
b30f223b RS |
2217 | if (mode == TYPE_MODE (signed_char_type_node)) |
2218 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2219 | ||
2220 | if (mode == TYPE_MODE (short_integer_type_node)) | |
2221 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2222 | ||
b30f223b RS |
2223 | if (mode == TYPE_MODE (long_integer_type_node)) |
2224 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2225 | ||
2226 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
2227 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2228 | ||
835f9b4d | 2229 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
d125d268 | 2230 | return unsignedp ? widest_unsigned_literal_type_node |
6de9cd9a | 2231 | : widest_integer_literal_type_node; |
835f9b4d | 2232 | |
0afeef64 | 2233 | if (mode == QImode) |
3fc7e390 RS |
2234 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
2235 | ||
0afeef64 | 2236 | if (mode == HImode) |
3fc7e390 RS |
2237 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
2238 | ||
0afeef64 | 2239 | if (mode == SImode) |
3fc7e390 RS |
2240 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
2241 | ||
0afeef64 | 2242 | if (mode == DImode) |
3fc7e390 RS |
2243 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
2244 | ||
21a9616b | 2245 | #if HOST_BITS_PER_WIDE_INT >= 64 |
a6d7e156 JL |
2246 | if (mode == TYPE_MODE (intTI_type_node)) |
2247 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
21a9616b | 2248 | #endif |
a6d7e156 | 2249 | |
b30f223b RS |
2250 | if (mode == TYPE_MODE (float_type_node)) |
2251 | return float_type_node; | |
2252 | ||
2253 | if (mode == TYPE_MODE (double_type_node)) | |
2254 | return double_type_node; | |
2255 | ||
2256 | if (mode == TYPE_MODE (long_double_type_node)) | |
2257 | return long_double_type_node; | |
2258 | ||
ff42324e NS |
2259 | if (mode == TYPE_MODE (void_type_node)) |
2260 | return void_type_node; | |
9f63daea | 2261 | |
b30f223b | 2262 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
19b3ffbc DD |
2263 | return (unsignedp |
2264 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2265 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b RS |
2266 | |
2267 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
19b3ffbc DD |
2268 | return (unsignedp |
2269 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2270 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b | 2271 | |
7e7e470f RH |
2272 | if (COMPLEX_MODE_P (mode)) |
2273 | { | |
2274 | enum machine_mode inner_mode; | |
2275 | tree inner_type; | |
2276 | ||
2277 | if (mode == TYPE_MODE (complex_float_type_node)) | |
2278 | return complex_float_type_node; | |
2279 | if (mode == TYPE_MODE (complex_double_type_node)) | |
2280 | return complex_double_type_node; | |
2281 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
2282 | return complex_long_double_type_node; | |
2283 | ||
2284 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
2285 | return complex_integer_type_node; | |
2286 | ||
2287 | inner_mode = GET_MODE_INNER (mode); | |
2288 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2289 | if (inner_type != NULL_TREE) | |
2290 | return build_complex_type (inner_type); | |
2291 | } | |
2292 | else if (VECTOR_MODE_P (mode)) | |
4a5eab38 PB |
2293 | { |
2294 | enum machine_mode inner_mode = GET_MODE_INNER (mode); | |
2295 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2296 | if (inner_type != NULL_TREE) | |
2297 | return build_vector_type_for_mode (inner_type, mode); | |
0afeef64 | 2298 | } |
4061f623 | 2299 | |
9a8ce21f JG |
2300 | if (mode == TYPE_MODE (dfloat32_type_node)) |
2301 | return dfloat32_type_node; | |
2302 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
2303 | return dfloat64_type_node; | |
2304 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
2305 | return dfloat128_type_node; | |
2306 | ||
ab22c1fa CF |
2307 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
2308 | { | |
2309 | if (mode == TYPE_MODE (short_fract_type_node)) | |
2310 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
2311 | if (mode == TYPE_MODE (fract_type_node)) | |
2312 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
2313 | if (mode == TYPE_MODE (long_fract_type_node)) | |
2314 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
2315 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
2316 | return unsignedp ? sat_long_long_fract_type_node | |
2317 | : long_long_fract_type_node; | |
2318 | ||
2319 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
2320 | return unsignedp ? sat_unsigned_short_fract_type_node | |
2321 | : unsigned_short_fract_type_node; | |
2322 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
2323 | return unsignedp ? sat_unsigned_fract_type_node | |
2324 | : unsigned_fract_type_node; | |
2325 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
2326 | return unsignedp ? sat_unsigned_long_fract_type_node | |
2327 | : unsigned_long_fract_type_node; | |
2328 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
2329 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
2330 | : unsigned_long_long_fract_type_node; | |
2331 | ||
2332 | if (mode == TYPE_MODE (short_accum_type_node)) | |
2333 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
2334 | if (mode == TYPE_MODE (accum_type_node)) | |
2335 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
2336 | if (mode == TYPE_MODE (long_accum_type_node)) | |
2337 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
2338 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
2339 | return unsignedp ? sat_long_long_accum_type_node | |
2340 | : long_long_accum_type_node; | |
2341 | ||
2342 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
2343 | return unsignedp ? sat_unsigned_short_accum_type_node | |
2344 | : unsigned_short_accum_type_node; | |
2345 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
2346 | return unsignedp ? sat_unsigned_accum_type_node | |
2347 | : unsigned_accum_type_node; | |
2348 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
2349 | return unsignedp ? sat_unsigned_long_accum_type_node | |
2350 | : unsigned_long_accum_type_node; | |
2351 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
2352 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
2353 | : unsigned_long_long_accum_type_node; | |
2354 | ||
2355 | if (mode == QQmode) | |
2356 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
2357 | if (mode == HQmode) | |
2358 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
2359 | if (mode == SQmode) | |
2360 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
2361 | if (mode == DQmode) | |
2362 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
2363 | if (mode == TQmode) | |
2364 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
2365 | ||
2366 | if (mode == UQQmode) | |
2367 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
2368 | if (mode == UHQmode) | |
2369 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
2370 | if (mode == USQmode) | |
2371 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
2372 | if (mode == UDQmode) | |
2373 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
2374 | if (mode == UTQmode) | |
2375 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
2376 | ||
2377 | if (mode == HAmode) | |
2378 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
2379 | if (mode == SAmode) | |
2380 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
2381 | if (mode == DAmode) | |
2382 | return unsignedp ? sat_da_type_node : da_type_node; | |
2383 | if (mode == TAmode) | |
2384 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
2385 | ||
2386 | if (mode == UHAmode) | |
2387 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
2388 | if (mode == USAmode) | |
2389 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
2390 | if (mode == UDAmode) | |
2391 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
2392 | if (mode == UTAmode) | |
2393 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
2394 | } | |
2395 | ||
d1d3865f ZW |
2396 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
2397 | if (TYPE_MODE (TREE_VALUE (t)) == mode) | |
2398 | return TREE_VALUE (t); | |
2399 | ||
b30f223b RS |
2400 | return 0; |
2401 | } | |
693a6128 | 2402 | |
12753674 RE |
2403 | tree |
2404 | c_common_unsigned_type (tree type) | |
2405 | { | |
2406 | return c_common_signed_or_unsigned_type (1, type); | |
2407 | } | |
2408 | ||
693a6128 GRK |
2409 | /* Return a signed type the same as TYPE in other respects. */ |
2410 | ||
2411 | tree | |
35b1a6fa | 2412 | c_common_signed_type (tree type) |
693a6128 | 2413 | { |
ceef8ce4 | 2414 | return c_common_signed_or_unsigned_type (0, type); |
693a6128 GRK |
2415 | } |
2416 | ||
2417 | /* Return a type the same as TYPE except unsigned or | |
2418 | signed according to UNSIGNEDP. */ | |
2419 | ||
2420 | tree | |
35b1a6fa | 2421 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
693a6128 | 2422 | { |
c74a03d2 | 2423 | tree type1; |
693a6128 | 2424 | |
c74a03d2 RAE |
2425 | /* This block of code emulates the behavior of the old |
2426 | c_common_unsigned_type. In particular, it returns | |
2427 | long_unsigned_type_node if passed a long, even when a int would | |
2428 | have the same size. This is necessary for warnings to work | |
2429 | correctly in archs where sizeof(int) == sizeof(long) */ | |
2430 | ||
2431 | type1 = TYPE_MAIN_VARIANT (type); | |
2432 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
2433 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2434 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
2435 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2436 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
2437 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2438 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
2439 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2440 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
2441 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2442 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) | |
2443 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
2444 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
2445 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
2446 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
2447 | #endif | |
2448 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
2449 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2450 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
2451 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2452 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
2453 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2454 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
2455 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2456 | ||
70d3fcab AH |
2457 | #define C_COMMON_FIXED_TYPES(NAME) \ |
2458 | if (type1 == short_ ## NAME ## _type_node \ | |
2459 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
2460 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
2461 | : short_ ## NAME ## _type_node; \ | |
2462 | if (type1 == NAME ## _type_node \ | |
2463 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
2464 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
2465 | : NAME ## _type_node; \ | |
2466 | if (type1 == long_ ## NAME ## _type_node \ | |
2467 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
2468 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
2469 | : long_ ## NAME ## _type_node; \ | |
2470 | if (type1 == long_long_ ## NAME ## _type_node \ | |
2471 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
2472 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
2473 | : long_long_ ## NAME ## _type_node; | |
2474 | ||
2475 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
2476 | if (type1 == NAME ## _type_node \ | |
2477 | || type1 == u ## NAME ## _type_node) \ | |
2478 | return unsignedp ? u ## NAME ## _type_node \ | |
2479 | : NAME ## _type_node; | |
2480 | ||
2481 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
2482 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
2483 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
2484 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
2485 | : sat_ ## short_ ## NAME ## _type_node; \ | |
2486 | if (type1 == sat_ ## NAME ## _type_node \ | |
2487 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
2488 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
2489 | : sat_ ## NAME ## _type_node; \ | |
2490 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
2491 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
2492 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
2493 | : sat_ ## long_ ## NAME ## _type_node; \ | |
2494 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
2495 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
2496 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
2497 | : sat_ ## long_long_ ## NAME ## _type_node; | |
2498 | ||
2499 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
2500 | if (type1 == sat_ ## NAME ## _type_node \ | |
2501 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
2502 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
2503 | : sat_ ## NAME ## _type_node; | |
2504 | ||
2505 | C_COMMON_FIXED_TYPES (fract); | |
2506 | C_COMMON_FIXED_TYPES_SAT (fract); | |
2507 | C_COMMON_FIXED_TYPES (accum); | |
2508 | C_COMMON_FIXED_TYPES_SAT (accum); | |
2509 | ||
2510 | C_COMMON_FIXED_MODE_TYPES (qq); | |
2511 | C_COMMON_FIXED_MODE_TYPES (hq); | |
2512 | C_COMMON_FIXED_MODE_TYPES (sq); | |
2513 | C_COMMON_FIXED_MODE_TYPES (dq); | |
2514 | C_COMMON_FIXED_MODE_TYPES (tq); | |
2515 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
2516 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
2517 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
2518 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
2519 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
2520 | C_COMMON_FIXED_MODE_TYPES (ha); | |
2521 | C_COMMON_FIXED_MODE_TYPES (sa); | |
2522 | C_COMMON_FIXED_MODE_TYPES (da); | |
2523 | C_COMMON_FIXED_MODE_TYPES (ta); | |
2524 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
2525 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
2526 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
2527 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
ab22c1fa | 2528 | |
bc15d0ef JM |
2529 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
2530 | the precision; they have precision set to match their range, but | |
2531 | may use a wider mode to match an ABI. If we change modes, we may | |
2532 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
2533 | the precision as well, so as to yield correct results for | |
2534 | bit-field types. C++ does not have these separate bit-field | |
2535 | types, and producing a signed or unsigned variant of an | |
2536 | ENUMERAL_TYPE may cause other problems as well. */ | |
2537 | ||
1e204133 RAE |
2538 | if (!INTEGRAL_TYPE_P (type) |
2539 | || TYPE_UNSIGNED (type) == unsignedp) | |
2540 | return type; | |
2541 | ||
bc15d0ef JM |
2542 | #define TYPE_OK(node) \ |
2543 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
2544 | && (c_dialect_cxx () || TYPE_PRECISION (type) == TYPE_PRECISION (node))) | |
2545 | if (TYPE_OK (signed_char_type_node)) | |
693a6128 | 2546 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
bc15d0ef | 2547 | if (TYPE_OK (integer_type_node)) |
693a6128 | 2548 | return unsignedp ? unsigned_type_node : integer_type_node; |
bc15d0ef | 2549 | if (TYPE_OK (short_integer_type_node)) |
693a6128 | 2550 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
bc15d0ef | 2551 | if (TYPE_OK (long_integer_type_node)) |
693a6128 | 2552 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
bc15d0ef | 2553 | if (TYPE_OK (long_long_integer_type_node)) |
693a6128 GRK |
2554 | return (unsignedp ? long_long_unsigned_type_node |
2555 | : long_long_integer_type_node); | |
bc15d0ef | 2556 | if (TYPE_OK (widest_integer_literal_type_node)) |
693a6128 GRK |
2557 | return (unsignedp ? widest_unsigned_literal_type_node |
2558 | : widest_integer_literal_type_node); | |
4a063bec RH |
2559 | |
2560 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
bc15d0ef | 2561 | if (TYPE_OK (intTI_type_node)) |
4a063bec RH |
2562 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
2563 | #endif | |
bc15d0ef | 2564 | if (TYPE_OK (intDI_type_node)) |
4a063bec | 2565 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
bc15d0ef | 2566 | if (TYPE_OK (intSI_type_node)) |
4a063bec | 2567 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
bc15d0ef | 2568 | if (TYPE_OK (intHI_type_node)) |
4a063bec | 2569 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
bc15d0ef | 2570 | if (TYPE_OK (intQI_type_node)) |
4a063bec | 2571 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
bc15d0ef | 2572 | #undef TYPE_OK |
4a063bec | 2573 | |
bc15d0ef JM |
2574 | if (c_dialect_cxx ()) |
2575 | return type; | |
2576 | else | |
2577 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); | |
693a6128 | 2578 | } |
9649812a | 2579 | |
38a4afee MM |
2580 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
2581 | ||
2582 | tree | |
2583 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
2584 | { | |
2585 | /* Extended integer types of the same width as a standard type have | |
2586 | lesser rank, so those of the same width as int promote to int or | |
2587 | unsigned int and are valid for printf formats expecting int or | |
2588 | unsigned int. To avoid such special cases, avoid creating | |
2589 | extended integer types for bit-fields if a standard integer type | |
2590 | is available. */ | |
2591 | if (width == TYPE_PRECISION (integer_type_node)) | |
2592 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2593 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
2594 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2595 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
2596 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2597 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
2598 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2599 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
2600 | return (unsignedp ? long_long_unsigned_type_node | |
2601 | : long_long_integer_type_node); | |
2602 | return build_nonstandard_integer_type (width, unsignedp); | |
2603 | } | |
2604 | ||
9649812a MM |
2605 | /* The C version of the register_builtin_type langhook. */ |
2606 | ||
2607 | void | |
2608 | c_register_builtin_type (tree type, const char* name) | |
2609 | { | |
2610 | tree decl; | |
2611 | ||
2612 | decl = build_decl (TYPE_DECL, get_identifier (name), type); | |
2613 | DECL_ARTIFICIAL (decl) = 1; | |
2614 | if (!TYPE_NAME (type)) | |
2615 | TYPE_NAME (type) = decl; | |
2616 | pushdecl (decl); | |
d1d3865f ZW |
2617 | |
2618 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
9649812a MM |
2619 | } |
2620 | ||
b30f223b | 2621 | \f |
6acfe908 JM |
2622 | /* Return the minimum number of bits needed to represent VALUE in a |
2623 | signed or unsigned type, UNSIGNEDP says which. */ | |
2624 | ||
05bccae2 | 2625 | unsigned int |
35b1a6fa | 2626 | min_precision (tree value, int unsignedp) |
6acfe908 JM |
2627 | { |
2628 | int log; | |
2629 | ||
2630 | /* If the value is negative, compute its negative minus 1. The latter | |
2631 | adjustment is because the absolute value of the largest negative value | |
2632 | is one larger than the largest positive value. This is equivalent to | |
2633 | a bit-wise negation, so use that operation instead. */ | |
2634 | ||
2635 | if (tree_int_cst_sgn (value) < 0) | |
987b67bc | 2636 | value = fold_build1 (BIT_NOT_EXPR, TREE_TYPE (value), value); |
6acfe908 JM |
2637 | |
2638 | /* Return the number of bits needed, taking into account the fact | |
2639 | that we need one more bit for a signed than unsigned type. */ | |
2640 | ||
2641 | if (integer_zerop (value)) | |
2642 | log = 0; | |
6acfe908 | 2643 | else |
05bccae2 | 2644 | log = tree_floor_log2 (value); |
6acfe908 | 2645 | |
3f75a254 | 2646 | return log + 1 + !unsignedp; |
6acfe908 JM |
2647 | } |
2648 | \f | |
78ef5b89 | 2649 | /* Print an error message for invalid operands to arith operation |
2c751309 | 2650 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. */ |
b30f223b RS |
2651 | |
2652 | void | |
2c751309 | 2653 | binary_op_error (enum tree_code code, tree type0, tree type1) |
b30f223b | 2654 | { |
b3694847 | 2655 | const char *opname; |
89c78d7d | 2656 | |
b30f223b RS |
2657 | switch (code) |
2658 | { | |
b30f223b RS |
2659 | case PLUS_EXPR: |
2660 | opname = "+"; break; | |
2661 | case MINUS_EXPR: | |
2662 | opname = "-"; break; | |
2663 | case MULT_EXPR: | |
2664 | opname = "*"; break; | |
2665 | case MAX_EXPR: | |
2666 | opname = "max"; break; | |
2667 | case MIN_EXPR: | |
2668 | opname = "min"; break; | |
2669 | case EQ_EXPR: | |
2670 | opname = "=="; break; | |
2671 | case NE_EXPR: | |
2672 | opname = "!="; break; | |
2673 | case LE_EXPR: | |
2674 | opname = "<="; break; | |
2675 | case GE_EXPR: | |
2676 | opname = ">="; break; | |
2677 | case LT_EXPR: | |
2678 | opname = "<"; break; | |
2679 | case GT_EXPR: | |
2680 | opname = ">"; break; | |
2681 | case LSHIFT_EXPR: | |
2682 | opname = "<<"; break; | |
2683 | case RSHIFT_EXPR: | |
2684 | opname = ">>"; break; | |
2685 | case TRUNC_MOD_EXPR: | |
047de90b | 2686 | case FLOOR_MOD_EXPR: |
b30f223b RS |
2687 | opname = "%"; break; |
2688 | case TRUNC_DIV_EXPR: | |
047de90b | 2689 | case FLOOR_DIV_EXPR: |
b30f223b RS |
2690 | opname = "/"; break; |
2691 | case BIT_AND_EXPR: | |
2692 | opname = "&"; break; | |
2693 | case BIT_IOR_EXPR: | |
2694 | opname = "|"; break; | |
2695 | case TRUTH_ANDIF_EXPR: | |
2696 | opname = "&&"; break; | |
2697 | case TRUTH_ORIF_EXPR: | |
2698 | opname = "||"; break; | |
2699 | case BIT_XOR_EXPR: | |
2700 | opname = "^"; break; | |
6d819282 | 2701 | default: |
37b2f290 | 2702 | gcc_unreachable (); |
b30f223b | 2703 | } |
2c751309 DB |
2704 | error ("invalid operands to binary %s (have %qT and %qT)", opname, |
2705 | type0, type1); | |
b30f223b RS |
2706 | } |
2707 | \f | |
2708 | /* Subroutine of build_binary_op, used for comparison operations. | |
2709 | See if the operands have both been converted from subword integer types | |
2710 | and, if so, perhaps change them both back to their original type. | |
94dccd9d RS |
2711 | This function is also responsible for converting the two operands |
2712 | to the proper common type for comparison. | |
b30f223b RS |
2713 | |
2714 | The arguments of this function are all pointers to local variables | |
2715 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
2716 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
2717 | ||
2718 | If this function returns nonzero, it means that the comparison has | |
2719 | a constant value. What this function returns is an expression for | |
2720 | that value. */ | |
2721 | ||
2722 | tree | |
35b1a6fa AJ |
2723 | shorten_compare (tree *op0_ptr, tree *op1_ptr, tree *restype_ptr, |
2724 | enum tree_code *rescode_ptr) | |
b30f223b | 2725 | { |
b3694847 | 2726 | tree type; |
b30f223b RS |
2727 | tree op0 = *op0_ptr; |
2728 | tree op1 = *op1_ptr; | |
2729 | int unsignedp0, unsignedp1; | |
2730 | int real1, real2; | |
2731 | tree primop0, primop1; | |
2732 | enum tree_code code = *rescode_ptr; | |
2733 | ||
2734 | /* Throw away any conversions to wider types | |
2735 | already present in the operands. */ | |
2736 | ||
2737 | primop0 = get_narrower (op0, &unsignedp0); | |
2738 | primop1 = get_narrower (op1, &unsignedp1); | |
2739 | ||
2740 | /* Handle the case that OP0 does not *contain* a conversion | |
2741 | but it *requires* conversion to FINAL_TYPE. */ | |
2742 | ||
2743 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
8df83eae | 2744 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b30f223b | 2745 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
8df83eae | 2746 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b30f223b RS |
2747 | |
2748 | /* If one of the operands must be floated, we cannot optimize. */ | |
2749 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
2750 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
2751 | ||
2752 | /* If first arg is constant, swap the args (changing operation | |
5af6001b RK |
2753 | so value is preserved), for canonicalization. Don't do this if |
2754 | the second arg is 0. */ | |
b30f223b | 2755 | |
5af6001b | 2756 | if (TREE_CONSTANT (primop0) |
ab22c1fa CF |
2757 | && !integer_zerop (primop1) && !real_zerop (primop1) |
2758 | && !fixed_zerop (primop1)) | |
b30f223b | 2759 | { |
b3694847 SS |
2760 | tree tem = primop0; |
2761 | int temi = unsignedp0; | |
b30f223b RS |
2762 | primop0 = primop1; |
2763 | primop1 = tem; | |
2764 | tem = op0; | |
2765 | op0 = op1; | |
2766 | op1 = tem; | |
2767 | *op0_ptr = op0; | |
2768 | *op1_ptr = op1; | |
2769 | unsignedp0 = unsignedp1; | |
2770 | unsignedp1 = temi; | |
2771 | temi = real1; | |
2772 | real1 = real2; | |
2773 | real2 = temi; | |
2774 | ||
2775 | switch (code) | |
2776 | { | |
2777 | case LT_EXPR: | |
2778 | code = GT_EXPR; | |
2779 | break; | |
2780 | case GT_EXPR: | |
2781 | code = LT_EXPR; | |
2782 | break; | |
2783 | case LE_EXPR: | |
2784 | code = GE_EXPR; | |
2785 | break; | |
2786 | case GE_EXPR: | |
2787 | code = LE_EXPR; | |
2788 | break; | |
6d819282 MK |
2789 | default: |
2790 | break; | |
b30f223b RS |
2791 | } |
2792 | *rescode_ptr = code; | |
2793 | } | |
2794 | ||
2795 | /* If comparing an integer against a constant more bits wide, | |
2796 | maybe we can deduce a value of 1 or 0 independent of the data. | |
2797 | Or else truncate the constant now | |
2798 | rather than extend the variable at run time. | |
2799 | ||
2800 | This is only interesting if the constant is the wider arg. | |
2801 | Also, it is not safe if the constant is unsigned and the | |
2802 | variable arg is signed, since in this case the variable | |
2803 | would be sign-extended and then regarded as unsigned. | |
2804 | Our technique fails in this case because the lowest/highest | |
2805 | possible unsigned results don't follow naturally from the | |
2806 | lowest/highest possible values of the variable operand. | |
2807 | For just EQ_EXPR and NE_EXPR there is another technique that | |
2808 | could be used: see if the constant can be faithfully represented | |
2809 | in the other operand's type, by truncating it and reextending it | |
2810 | and see if that preserves the constant's value. */ | |
2811 | ||
2812 | if (!real1 && !real2 | |
ab22c1fa | 2813 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b30f223b RS |
2814 | && TREE_CODE (primop1) == INTEGER_CST |
2815 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
2816 | { | |
2817 | int min_gt, max_gt, min_lt, max_lt; | |
2818 | tree maxval, minval; | |
2819 | /* 1 if comparison is nominally unsigned. */ | |
8df83eae | 2820 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b30f223b RS |
2821 | tree val; |
2822 | ||
ceef8ce4 NB |
2823 | type = c_common_signed_or_unsigned_type (unsignedp0, |
2824 | TREE_TYPE (primop0)); | |
8bbd5685 | 2825 | |
b30f223b RS |
2826 | maxval = TYPE_MAX_VALUE (type); |
2827 | minval = TYPE_MIN_VALUE (type); | |
2828 | ||
2829 | if (unsignedp && !unsignedp0) | |
ceef8ce4 | 2830 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b30f223b RS |
2831 | |
2832 | if (TREE_TYPE (primop1) != *restype_ptr) | |
fae1b38d | 2833 | { |
af9c6659 NS |
2834 | /* Convert primop1 to target type, but do not introduce |
2835 | additional overflow. We know primop1 is an int_cst. */ | |
b8fca551 RG |
2836 | primop1 = force_fit_type_double (*restype_ptr, |
2837 | TREE_INT_CST_LOW (primop1), | |
2838 | TREE_INT_CST_HIGH (primop1), 0, | |
d95787e6 | 2839 | TREE_OVERFLOW (primop1)); |
fae1b38d | 2840 | } |
b30f223b RS |
2841 | if (type != *restype_ptr) |
2842 | { | |
2843 | minval = convert (*restype_ptr, minval); | |
2844 | maxval = convert (*restype_ptr, maxval); | |
2845 | } | |
2846 | ||
2847 | if (unsignedp && unsignedp0) | |
2848 | { | |
2849 | min_gt = INT_CST_LT_UNSIGNED (primop1, minval); | |
2850 | max_gt = INT_CST_LT_UNSIGNED (primop1, maxval); | |
2851 | min_lt = INT_CST_LT_UNSIGNED (minval, primop1); | |
2852 | max_lt = INT_CST_LT_UNSIGNED (maxval, primop1); | |
2853 | } | |
2854 | else | |
2855 | { | |
2856 | min_gt = INT_CST_LT (primop1, minval); | |
2857 | max_gt = INT_CST_LT (primop1, maxval); | |
2858 | min_lt = INT_CST_LT (minval, primop1); | |
2859 | max_lt = INT_CST_LT (maxval, primop1); | |
2860 | } | |
2861 | ||
2862 | val = 0; | |
2863 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
2864 | if (code == NE_EXPR) | |
2865 | { | |
2866 | if (max_lt || min_gt) | |
de7df9eb | 2867 | val = truthvalue_true_node; |
b30f223b RS |
2868 | } |
2869 | else if (code == EQ_EXPR) | |
2870 | { | |
2871 | if (max_lt || min_gt) | |
de7df9eb | 2872 | val = truthvalue_false_node; |
b30f223b RS |
2873 | } |
2874 | else if (code == LT_EXPR) | |
2875 | { | |
2876 | if (max_lt) | |
de7df9eb | 2877 | val = truthvalue_true_node; |
b30f223b | 2878 | if (!min_lt) |
de7df9eb | 2879 | val = truthvalue_false_node; |
b30f223b RS |
2880 | } |
2881 | else if (code == GT_EXPR) | |
2882 | { | |
2883 | if (min_gt) | |
de7df9eb | 2884 | val = truthvalue_true_node; |
b30f223b | 2885 | if (!max_gt) |
de7df9eb | 2886 | val = truthvalue_false_node; |
b30f223b RS |
2887 | } |
2888 | else if (code == LE_EXPR) | |
2889 | { | |
2890 | if (!max_gt) | |
de7df9eb | 2891 | val = truthvalue_true_node; |
b30f223b | 2892 | if (min_gt) |
de7df9eb | 2893 | val = truthvalue_false_node; |
b30f223b RS |
2894 | } |
2895 | else if (code == GE_EXPR) | |
2896 | { | |
2897 | if (!min_lt) | |
de7df9eb | 2898 | val = truthvalue_true_node; |
b30f223b | 2899 | if (max_lt) |
de7df9eb | 2900 | val = truthvalue_false_node; |
b30f223b RS |
2901 | } |
2902 | ||
2903 | /* If primop0 was sign-extended and unsigned comparison specd, | |
2904 | we did a signed comparison above using the signed type bounds. | |
2905 | But the comparison we output must be unsigned. | |
2906 | ||
2907 | Also, for inequalities, VAL is no good; but if the signed | |
2908 | comparison had *any* fixed result, it follows that the | |
2909 | unsigned comparison just tests the sign in reverse | |
2910 | (positive values are LE, negative ones GE). | |
2911 | So we can generate an unsigned comparison | |
2912 | against an extreme value of the signed type. */ | |
2913 | ||
2914 | if (unsignedp && !unsignedp0) | |
2915 | { | |
2916 | if (val != 0) | |
2917 | switch (code) | |
2918 | { | |
2919 | case LT_EXPR: | |
2920 | case GE_EXPR: | |
2921 | primop1 = TYPE_MIN_VALUE (type); | |
2922 | val = 0; | |
2923 | break; | |
2924 | ||
2925 | case LE_EXPR: | |
2926 | case GT_EXPR: | |
2927 | primop1 = TYPE_MAX_VALUE (type); | |
2928 | val = 0; | |
2929 | break; | |
6d819282 MK |
2930 | |
2931 | default: | |
2932 | break; | |
b30f223b | 2933 | } |
12753674 | 2934 | type = c_common_unsigned_type (type); |
b30f223b RS |
2935 | } |
2936 | ||
5c5b2283 | 2937 | if (TREE_CODE (primop0) != INTEGER_CST) |
b30f223b | 2938 | { |
de7df9eb | 2939 | if (val == truthvalue_false_node) |
f6aa72dd | 2940 | warning (OPT_Wtype_limits, "comparison is always false due to limited range of data type"); |
de7df9eb | 2941 | if (val == truthvalue_true_node) |
f6aa72dd | 2942 | warning (OPT_Wtype_limits, "comparison is always true due to limited range of data type"); |
b30f223b RS |
2943 | } |
2944 | ||
2945 | if (val != 0) | |
2946 | { | |
2947 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
2948 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 | 2949 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b30f223b RS |
2950 | return val; |
2951 | } | |
2952 | ||
2953 | /* Value is not predetermined, but do the comparison | |
2954 | in the type of the operand that is not constant. | |
2955 | TYPE is already properly set. */ | |
2956 | } | |
9a8ce21f JG |
2957 | |
2958 | /* If either arg is decimal float and the other is float, find the | |
2959 | proper common type to use for comparison. */ | |
2960 | else if (real1 && real2 | |
2961 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
2962 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
2963 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
2964 | ||
b30f223b | 2965 | else if (real1 && real2 |
766f6c30 RS |
2966 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
2967 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b30f223b RS |
2968 | type = TREE_TYPE (primop0); |
2969 | ||
2970 | /* If args' natural types are both narrower than nominal type | |
2971 | and both extend in the same manner, compare them | |
2972 | in the type of the wider arg. | |
2973 | Otherwise must actually extend both to the nominal | |
2974 | common type lest different ways of extending | |
2975 | alter the result. | |
2976 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
2977 | ||
2978 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
2979 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
2980 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
2981 | { | |
2982 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
ceef8ce4 | 2983 | type = c_common_signed_or_unsigned_type (unsignedp0 |
8df83eae | 2984 | || TYPE_UNSIGNED (*restype_ptr), |
ceef8ce4 | 2985 | type); |
b30f223b RS |
2986 | /* Make sure shorter operand is extended the right way |
2987 | to match the longer operand. */ | |
ceef8ce4 NB |
2988 | primop0 |
2989 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
2990 | TREE_TYPE (primop0)), | |
2991 | primop0); | |
2992 | primop1 | |
2993 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
2994 | TREE_TYPE (primop1)), | |
2995 | primop1); | |
b30f223b RS |
2996 | } |
2997 | else | |
2998 | { | |
2999 | /* Here we must do the comparison on the nominal type | |
3000 | using the args exactly as we received them. */ | |
3001 | type = *restype_ptr; | |
3002 | primop0 = op0; | |
3003 | primop1 = op1; | |
3004 | ||
3005 | if (!real1 && !real2 && integer_zerop (primop1) | |
8df83eae | 3006 | && TYPE_UNSIGNED (*restype_ptr)) |
b30f223b RS |
3007 | { |
3008 | tree value = 0; | |
3009 | switch (code) | |
3010 | { | |
3011 | case GE_EXPR: | |
f6aa72dd MLI |
3012 | /* All unsigned values are >= 0, so we warn. However, |
3013 | if OP0 is a constant that is >= 0, the signedness of | |
3014 | the comparison isn't an issue, so suppress the | |
3015 | warning. */ | |
3016 | if (warn_type_limits && !in_system_header | |
3f75a254 JM |
3017 | && !(TREE_CODE (primop0) == INTEGER_CST |
3018 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3019 | primop0)))) | |
f6aa72dd MLI |
3020 | warning (OPT_Wtype_limits, |
3021 | "comparison of unsigned expression >= 0 is always true"); | |
de7df9eb | 3022 | value = truthvalue_true_node; |
b30f223b RS |
3023 | break; |
3024 | ||
3025 | case LT_EXPR: | |
f6aa72dd | 3026 | if (warn_type_limits && !in_system_header |
3f75a254 JM |
3027 | && !(TREE_CODE (primop0) == INTEGER_CST |
3028 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3029 | primop0)))) | |
f6aa72dd MLI |
3030 | warning (OPT_Wtype_limits, |
3031 | "comparison of unsigned expression < 0 is always false"); | |
de7df9eb | 3032 | value = truthvalue_false_node; |
6d819282 MK |
3033 | break; |
3034 | ||
3035 | default: | |
3036 | break; | |
b30f223b RS |
3037 | } |
3038 | ||
3039 | if (value != 0) | |
3040 | { | |
3041 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3042 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 RS |
3043 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
3044 | primop0, value); | |
b30f223b RS |
3045 | return value; |
3046 | } | |
3047 | } | |
3048 | } | |
3049 | ||
3050 | *op0_ptr = convert (type, primop0); | |
3051 | *op1_ptr = convert (type, primop1); | |
3052 | ||
de7df9eb | 3053 | *restype_ptr = truthvalue_type_node; |
b30f223b RS |
3054 | |
3055 | return 0; | |
3056 | } | |
3057 | \f | |
7552da58 JJ |
3058 | /* Return a tree for the sum or difference (RESULTCODE says which) |
3059 | of pointer PTROP and integer INTOP. */ | |
3060 | ||
3061 | tree | |
35b1a6fa | 3062 | pointer_int_sum (enum tree_code resultcode, tree ptrop, tree intop) |
7552da58 | 3063 | { |
6ac01510 | 3064 | tree size_exp, ret; |
7552da58 | 3065 | |
7552da58 | 3066 | /* The result is a pointer of the same type that is being added. */ |
7552da58 JJ |
3067 | tree result_type = TREE_TYPE (ptrop); |
3068 | ||
3069 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
3070 | { | |
3071 | if (pedantic || warn_pointer_arith) | |
bda67431 | 3072 | pedwarn ("pointer of type %<void *%> used in arithmetic"); |
7552da58 JJ |
3073 | size_exp = integer_one_node; |
3074 | } | |
3075 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
3076 | { | |
3077 | if (pedantic || warn_pointer_arith) | |
3078 | pedwarn ("pointer to a function used in arithmetic"); | |
3079 | size_exp = integer_one_node; | |
3080 | } | |
3081 | else if (TREE_CODE (TREE_TYPE (result_type)) == METHOD_TYPE) | |
3082 | { | |
3083 | if (pedantic || warn_pointer_arith) | |
3084 | pedwarn ("pointer to member function used in arithmetic"); | |
3085 | size_exp = integer_one_node; | |
3086 | } | |
7552da58 JJ |
3087 | else |
3088 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
3089 | ||
6ac01510 ILT |
3090 | /* We are manipulating pointer values, so we don't need to warn |
3091 | about relying on undefined signed overflow. We disable the | |
3092 | warning here because we use integer types so fold won't know that | |
3093 | they are really pointers. */ | |
3094 | fold_defer_overflow_warnings (); | |
3095 | ||
7552da58 JJ |
3096 | /* If what we are about to multiply by the size of the elements |
3097 | contains a constant term, apply distributive law | |
3098 | and multiply that constant term separately. | |
3099 | This helps produce common subexpressions. */ | |
7552da58 | 3100 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
3f75a254 | 3101 | && !TREE_CONSTANT (intop) |
7552da58 JJ |
3102 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
3103 | && TREE_CONSTANT (size_exp) | |
3104 | /* If the constant comes from pointer subtraction, | |
3105 | skip this optimization--it would cause an error. */ | |
3106 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
3107 | /* If the constant is unsigned, and smaller than the pointer size, | |
3108 | then we must skip this optimization. This is because it could cause | |
3109 | an overflow error if the constant is negative but INTOP is not. */ | |
3f75a254 | 3110 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
7552da58 JJ |
3111 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
3112 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
3113 | { | |
3114 | enum tree_code subcode = resultcode; | |
3115 | tree int_type = TREE_TYPE (intop); | |
3116 | if (TREE_CODE (intop) == MINUS_EXPR) | |
3117 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
3118 | /* Convert both subexpression types to the type of intop, | |
3119 | because weird cases involving pointer arithmetic | |
3120 | can result in a sum or difference with different type args. */ | |
3121 | ptrop = build_binary_op (subcode, ptrop, | |
3122 | convert (int_type, TREE_OPERAND (intop, 1)), 1); | |
3123 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
3124 | } | |
3125 | ||
3126 | /* Convert the integer argument to a type the same size as sizetype | |
3127 | so the multiply won't overflow spuriously. */ | |
7552da58 | 3128 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
8df83eae | 3129 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
35b1a6fa | 3130 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
8df83eae | 3131 | TYPE_UNSIGNED (sizetype)), intop); |
7552da58 JJ |
3132 | |
3133 | /* Replace the integer argument with a suitable product by the object size. | |
3134 | Do this multiplication as signed, then convert to the appropriate | |
280f1ffa EB |
3135 | type for the pointer operation. */ |
3136 | intop = convert (sizetype, | |
3137 | build_binary_op (MULT_EXPR, intop, | |
3138 | convert (TREE_TYPE (intop), size_exp), 1)); | |
5be014d5 | 3139 | |
280f1ffa | 3140 | /* Create the sum or difference. */ |
5be014d5 | 3141 | if (resultcode == MINUS_EXPR) |
280f1ffa | 3142 | intop = fold_build1 (NEGATE_EXPR, sizetype, intop); |
7552da58 | 3143 | |
5be014d5 | 3144 | ret = fold_build2 (POINTER_PLUS_EXPR, result_type, ptrop, intop); |
6ac01510 ILT |
3145 | |
3146 | fold_undefer_and_ignore_overflow_warnings (); | |
3147 | ||
3148 | return ret; | |
7552da58 JJ |
3149 | } |
3150 | \f | |
b3c6d2ea ILT |
3151 | /* Return whether EXPR is a declaration whose address can never be |
3152 | NULL. */ | |
3153 | ||
3154 | bool | |
58f9752a | 3155 | decl_with_nonnull_addr_p (const_tree expr) |
b3c6d2ea ILT |
3156 | { |
3157 | return (DECL_P (expr) | |
3158 | && (TREE_CODE (expr) == PARM_DECL | |
3159 | || TREE_CODE (expr) == LABEL_DECL | |
3160 | || !DECL_WEAK (expr))); | |
3161 | } | |
3162 | ||
b30f223b | 3163 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
85498824 JM |
3164 | or for an `if' or `while' statement or ?..: exp. It should already |
3165 | have been validated to be of suitable type; otherwise, a bad | |
3166 | diagnostic may result. | |
b30f223b RS |
3167 | |
3168 | This preparation consists of taking the ordinary | |
3169 | representation of an expression expr and producing a valid tree | |
3170 | boolean expression describing whether expr is nonzero. We could | |
de7df9eb | 3171 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b30f223b RS |
3172 | but we optimize comparisons, &&, ||, and !. |
3173 | ||
de7df9eb | 3174 | The resulting type should always be `truthvalue_type_node'. */ |
b30f223b RS |
3175 | |
3176 | tree | |
35b1a6fa | 3177 | c_common_truthvalue_conversion (tree expr) |
b30f223b | 3178 | { |
b30f223b RS |
3179 | switch (TREE_CODE (expr)) |
3180 | { | |
d1a7edaf | 3181 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
6f312d18 ZW |
3182 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
3183 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
3184 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
90ec750d RS |
3185 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3186 | return expr; | |
3187 | return build2 (TREE_CODE (expr), truthvalue_type_node, | |
3188 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); | |
3189 | ||
b30f223b RS |
3190 | case TRUTH_ANDIF_EXPR: |
3191 | case TRUTH_ORIF_EXPR: | |
3192 | case TRUTH_AND_EXPR: | |
3193 | case TRUTH_OR_EXPR: | |
9379fac9 | 3194 | case TRUTH_XOR_EXPR: |
90ec750d RS |
3195 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3196 | return expr; | |
3197 | return build2 (TREE_CODE (expr), truthvalue_type_node, | |
85498824 JM |
3198 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)), |
3199 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1))); | |
18c0f675 | 3200 | |
18d00205 | 3201 | case TRUTH_NOT_EXPR: |
90ec750d RS |
3202 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3203 | return expr; | |
3204 | return build1 (TREE_CODE (expr), truthvalue_type_node, | |
85498824 | 3205 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0))); |
18d00205 | 3206 | |
b30f223b RS |
3207 | case ERROR_MARK: |
3208 | return expr; | |
3209 | ||
3210 | case INTEGER_CST: | |
d95787e6 RS |
3211 | return integer_zerop (expr) ? truthvalue_false_node |
3212 | : truthvalue_true_node; | |
b30f223b RS |
3213 | |
3214 | case REAL_CST: | |
010c4d9c RS |
3215 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
3216 | ? truthvalue_true_node | |
3217 | : truthvalue_false_node; | |
b30f223b | 3218 | |
ab22c1fa CF |
3219 | case FIXED_CST: |
3220 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
3221 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
3222 | ? truthvalue_true_node | |
3223 | : truthvalue_false_node; | |
3224 | ||
90ec750d RS |
3225 | case FUNCTION_DECL: |
3226 | expr = build_unary_op (ADDR_EXPR, expr, 0); | |
3227 | /* Fall through. */ | |
3228 | ||
b30f223b | 3229 | case ADDR_EXPR: |
1998463c | 3230 | { |
f6f08360 | 3231 | tree inner = TREE_OPERAND (expr, 0); |
b3c6d2ea | 3232 | if (decl_with_nonnull_addr_p (inner)) |
1998463c | 3233 | { |
b3c6d2ea | 3234 | /* Common Ada/Pascal programmer's mistake. */ |
c116cd05 | 3235 | warning (OPT_Waddress, |
b3c6d2ea | 3236 | "the address of %qD will always evaluate as %<true%>", |
f6f08360 | 3237 | inner); |
1998463c SB |
3238 | return truthvalue_true_node; |
3239 | } | |
fc0c675f | 3240 | |
b3c6d2ea ILT |
3241 | /* If we still have a decl, it is possible for its address to |
3242 | be NULL, so we cannot optimize. */ | |
3243 | if (DECL_P (inner)) | |
3244 | { | |
3245 | gcc_assert (DECL_WEAK (inner)); | |
3246 | break; | |
3247 | } | |
1998463c | 3248 | |
f6f08360 | 3249 | if (TREE_SIDE_EFFECTS (inner)) |
53fb4de3 | 3250 | return build2 (COMPOUND_EXPR, truthvalue_type_node, |
f6f08360 | 3251 | inner, truthvalue_true_node); |
1998463c SB |
3252 | else |
3253 | return truthvalue_true_node; | |
3254 | } | |
b30f223b | 3255 | |
766f6c30 | 3256 | case COMPLEX_EXPR: |
f0b996c5 | 3257 | return build_binary_op ((TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
b839fb3f | 3258 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
85498824 JM |
3259 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)), |
3260 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)), | |
766f6c30 RS |
3261 | 0); |
3262 | ||
b30f223b RS |
3263 | case NEGATE_EXPR: |
3264 | case ABS_EXPR: | |
3265 | case FLOAT_EXPR: | |
da7d8304 | 3266 | /* These don't change whether an object is nonzero or zero. */ |
85498824 | 3267 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b30f223b RS |
3268 | |
3269 | case LROTATE_EXPR: | |
3270 | case RROTATE_EXPR: | |
da7d8304 | 3271 | /* These don't change whether an object is zero or nonzero, but |
b30f223b RS |
3272 | we can't ignore them if their second arg has side-effects. */ |
3273 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
53fb4de3 RS |
3274 | return build2 (COMPOUND_EXPR, truthvalue_type_node, |
3275 | TREE_OPERAND (expr, 1), | |
85498824 | 3276 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0))); |
b30f223b | 3277 | else |
85498824 | 3278 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b57062ca | 3279 | |
b30f223b RS |
3280 | case COND_EXPR: |
3281 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
987b67bc | 3282 | return fold_build3 (COND_EXPR, truthvalue_type_node, |
53fb4de3 | 3283 | TREE_OPERAND (expr, 0), |
85498824 | 3284 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)), |
987b67bc | 3285 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 2))); |
b30f223b | 3286 | |
1043771b | 3287 | CASE_CONVERT: |
b30f223b RS |
3288 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
3289 | since that affects how `default_conversion' will behave. */ | |
3290 | if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE | |
3291 | || TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE) | |
3292 | break; | |
b30f223b RS |
3293 | /* If this is widening the argument, we can ignore it. */ |
3294 | if (TYPE_PRECISION (TREE_TYPE (expr)) | |
3295 | >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0)))) | |
85498824 | 3296 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b30f223b RS |
3297 | break; |
3298 | ||
e2aab13d | 3299 | case MODIFY_EXPR: |
fbc8d2d3 ILT |
3300 | if (!TREE_NO_WARNING (expr) |
3301 | && warn_parentheses) | |
3302 | { | |
3303 | warning (OPT_Wparentheses, | |
3304 | "suggest parentheses around assignment used as truth value"); | |
3305 | TREE_NO_WARNING (expr) = 1; | |
3306 | } | |
e2aab13d | 3307 | break; |
b57062ca | 3308 | |
6d819282 MK |
3309 | default: |
3310 | break; | |
b30f223b RS |
3311 | } |
3312 | ||
f0b996c5 | 3313 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
f0b8d9aa | 3314 | { |
78ef5b89 | 3315 | tree t = save_expr (expr); |
f0b8d9aa AS |
3316 | return (build_binary_op |
3317 | ((TREE_SIDE_EFFECTS (expr) | |
3318 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), | |
85498824 JM |
3319 | c_common_truthvalue_conversion (build_unary_op (REALPART_EXPR, t, 0)), |
3320 | c_common_truthvalue_conversion (build_unary_op (IMAGPART_EXPR, t, 0)), | |
f0b8d9aa AS |
3321 | 0)); |
3322 | } | |
f0b996c5 | 3323 | |
ab22c1fa CF |
3324 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
3325 | { | |
3326 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
3327 | FCONST0 (TYPE_MODE | |
3328 | (TREE_TYPE (expr)))); | |
3329 | return build_binary_op (NE_EXPR, expr, fixed_zero_node, 1); | |
3330 | } | |
3331 | ||
b30f223b RS |
3332 | return build_binary_op (NE_EXPR, expr, integer_zero_node, 1); |
3333 | } | |
3334 | \f | |
9bc15050 RG |
3335 | static void def_builtin_1 (enum built_in_function fncode, |
3336 | const char *name, | |
3337 | enum built_in_class fnclass, | |
3338 | tree fntype, tree libtype, | |
3339 | bool both_p, bool fallback_p, bool nonansi_p, | |
3340 | tree fnattrs, bool implicit_p); | |
fc2aaf30 | 3341 | |
3932261a MM |
3342 | |
3343 | /* Apply the TYPE_QUALS to the new DECL. */ | |
3344 | ||
3345 | void | |
35b1a6fa | 3346 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
3932261a | 3347 | { |
4b011bbf | 3348 | tree type = TREE_TYPE (decl); |
9f63daea | 3349 | |
5a6159dd AP |
3350 | if (type == error_mark_node) |
3351 | return; | |
4b011bbf JM |
3352 | |
3353 | if (((type_quals & TYPE_QUAL_CONST) | |
3354 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
3355 | /* An object declared 'const' is only readonly after it is | |
3356 | initialized. We don't have any way of expressing this currently, | |
3357 | so we need to be conservative and unset TREE_READONLY for types | |
3358 | with constructors. Otherwise aliasing code will ignore stores in | |
3359 | an inline constructor. */ | |
3360 | && !(type && TYPE_NEEDS_CONSTRUCTING (type))) | |
3932261a MM |
3361 | TREE_READONLY (decl) = 1; |
3362 | if (type_quals & TYPE_QUAL_VOLATILE) | |
3363 | { | |
3364 | TREE_SIDE_EFFECTS (decl) = 1; | |
3365 | TREE_THIS_VOLATILE (decl) = 1; | |
3366 | } | |
6946bc60 | 3367 | if (type_quals & TYPE_QUAL_RESTRICT) |
3932261a | 3368 | { |
4b011bbf JM |
3369 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
3370 | /* Allow 'restrict' on arrays of pointers. | |
3371 | FIXME currently we just ignore it. */ | |
3372 | type = TREE_TYPE (type); | |
3373 | if (!type | |
3374 | || !POINTER_TYPE_P (type) | |
3375 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
bda67431 | 3376 | error ("invalid use of %<restrict%>"); |
4b011bbf | 3377 | else if (flag_strict_aliasing && type == TREE_TYPE (decl)) |
3c5ad1ff RK |
3378 | /* Indicate we need to make a unique alias set for this pointer. |
3379 | We can't do it here because it might be pointing to an | |
3380 | incomplete type. */ | |
3381 | DECL_POINTER_ALIAS_SET (decl) = -2; | |
3932261a MM |
3382 | } |
3383 | } | |
3384 | ||
6de9cd9a DN |
3385 | /* Hash function for the problem of multiple type definitions in |
3386 | different files. This must hash all types that will compare | |
3387 | equal via comptypes to the same value. In practice it hashes | |
9cf737f8 | 3388 | on some of the simple stuff and leaves the details to comptypes. */ |
6de9cd9a DN |
3389 | |
3390 | static hashval_t | |
3391 | c_type_hash (const void *p) | |
3392 | { | |
3393 | int i = 0; | |
3394 | int shift, size; | |
741ac903 | 3395 | const_tree const t = (const_tree) p; |
6de9cd9a DN |
3396 | tree t2; |
3397 | switch (TREE_CODE (t)) | |
3398 | { | |
8c27b7d4 | 3399 | /* For pointers, hash on pointee type plus some swizzling. */ |
325c3691 RH |
3400 | case POINTER_TYPE: |
3401 | return c_type_hash (TREE_TYPE (t)) ^ 0x3003003; | |
3402 | /* Hash on number of elements and total size. */ | |
3403 | case ENUMERAL_TYPE: | |
3404 | shift = 3; | |
3405 | t2 = TYPE_VALUES (t); | |
3406 | break; | |
3407 | case RECORD_TYPE: | |
3408 | shift = 0; | |
3409 | t2 = TYPE_FIELDS (t); | |
3410 | break; | |
3411 | case QUAL_UNION_TYPE: | |
3412 | shift = 1; | |
3413 | t2 = TYPE_FIELDS (t); | |
3414 | break; | |
3415 | case UNION_TYPE: | |
3416 | shift = 2; | |
3417 | t2 = TYPE_FIELDS (t); | |
3418 | break; | |
3419 | default: | |
366de0ce | 3420 | gcc_unreachable (); |
6de9cd9a DN |
3421 | } |
3422 | for (; t2; t2 = TREE_CHAIN (t2)) | |
3423 | i++; | |
6fc3c3c0 TT |
3424 | /* We might have a VLA here. */ |
3425 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
3426 | size = 0; | |
3427 | else | |
3428 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); | |
6de9cd9a DN |
3429 | return ((size << 24) | (i << shift)); |
3430 | } | |
3431 | ||
4fe52ce9 DJ |
3432 | static GTY((param_is (union tree_node))) htab_t type_hash_table; |
3433 | ||
41472af8 | 3434 | /* Return the typed-based alias set for T, which may be an expression |
3bdf5ad1 | 3435 | or a type. Return -1 if we don't do anything special. */ |
41472af8 | 3436 | |
4862826d | 3437 | alias_set_type |
35b1a6fa | 3438 | c_common_get_alias_set (tree t) |
41472af8 | 3439 | { |
08bc2431 | 3440 | tree u; |
6de9cd9a | 3441 | PTR *slot; |
35b1a6fa | 3442 | |
08bc2431 MM |
3443 | /* Permit type-punning when accessing a union, provided the access |
3444 | is directly through the union. For example, this code does not | |
3445 | permit taking the address of a union member and then storing | |
3446 | through it. Even the type-punning allowed here is a GCC | |
3447 | extension, albeit a common and useful one; the C standard says | |
3448 | that such accesses have implementation-defined behavior. */ | |
3449 | for (u = t; | |
3450 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
3451 | u = TREE_OPERAND (u, 0)) | |
3452 | if (TREE_CODE (u) == COMPONENT_REF | |
3453 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
3454 | return 0; | |
ece32014 | 3455 | |
74d86f4f | 3456 | /* That's all the expressions we handle specially. */ |
3f75a254 | 3457 | if (!TYPE_P (t)) |
74d86f4f RH |
3458 | return -1; |
3459 | ||
95bd1dd7 | 3460 | /* The C standard guarantees that any object may be accessed via an |
74d86f4f RH |
3461 | lvalue that has character type. */ |
3462 | if (t == char_type_node | |
3463 | || t == signed_char_type_node | |
3464 | || t == unsigned_char_type_node) | |
3bdf5ad1 | 3465 | return 0; |
3932261a | 3466 | |
d18b1ed8 | 3467 | /* If it has the may_alias attribute, it can alias anything. */ |
74d86f4f | 3468 | if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (t))) |
d18b1ed8 OS |
3469 | return 0; |
3470 | ||
f824e5c3 RK |
3471 | /* The C standard specifically allows aliasing between signed and |
3472 | unsigned variants of the same type. We treat the signed | |
3473 | variant as canonical. */ | |
8df83eae | 3474 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
8f215dce | 3475 | { |
ceef8ce4 | 3476 | tree t1 = c_common_signed_type (t); |
f824e5c3 | 3477 | |
8f215dce JJ |
3478 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
3479 | if (t1 != t) | |
3480 | return get_alias_set (t1); | |
3481 | } | |
3bdf5ad1 | 3482 | else if (POINTER_TYPE_P (t)) |
02af3af6 | 3483 | { |
3bdf5ad1 | 3484 | tree t1; |
02af3af6 MS |
3485 | |
3486 | /* Unfortunately, there is no canonical form of a pointer type. | |
3487 | In particular, if we have `typedef int I', then `int *', and | |
3488 | `I *' are different types. So, we have to pick a canonical | |
3489 | representative. We do this below. | |
d125d268 | 3490 | |
b61148dd MM |
3491 | Technically, this approach is actually more conservative that |
3492 | it needs to be. In particular, `const int *' and `int *' | |
684d9f3b | 3493 | should be in different alias sets, according to the C and C++ |
b61148dd MM |
3494 | standard, since their types are not the same, and so, |
3495 | technically, an `int **' and `const int **' cannot point at | |
3496 | the same thing. | |
3497 | ||
6de9cd9a | 3498 | But, the standard is wrong. In particular, this code is |
b61148dd MM |
3499 | legal C++: |
3500 | ||
c22cacf3 MS |
3501 | int *ip; |
3502 | int **ipp = &ip; | |
3503 | const int* const* cipp = ipp; | |
b61148dd | 3504 | |
6de9cd9a | 3505 | And, it doesn't make sense for that to be legal unless you |
b61148dd MM |
3506 | can dereference IPP and CIPP. So, we ignore cv-qualifiers on |
3507 | the pointed-to types. This issue has been reported to the | |
3508 | C++ committee. */ | |
12e1243e | 3509 | t1 = build_type_no_quals (t); |
3bdf5ad1 RK |
3510 | if (t1 != t) |
3511 | return get_alias_set (t1); | |
02af3af6 | 3512 | } |
ece32014 | 3513 | |
6de9cd9a DN |
3514 | /* Handle the case of multiple type nodes referring to "the same" type, |
3515 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
3516 | C90 is handled. (In C99 type compatibility is not transitive, which | |
3517 | complicates things mightily. The alias set splay trees can theoretically | |
3518 | represent this, but insertion is tricky when you consider all the | |
3519 | different orders things might arrive in.) */ | |
3520 | ||
3521 | if (c_language != clk_c || flag_isoc99) | |
3522 | return -1; | |
3523 | ||
9cf737f8 | 3524 | /* Save time if there's only one input file. */ |
d974312d | 3525 | if (num_in_fnames == 1) |
6de9cd9a DN |
3526 | return -1; |
3527 | ||
3528 | /* Pointers need special handling if they point to any type that | |
3529 | needs special handling (below). */ | |
3530 | if (TREE_CODE (t) == POINTER_TYPE) | |
3531 | { | |
3532 | tree t2; | |
3533 | /* Find bottom type under any nested POINTERs. */ | |
9f63daea | 3534 | for (t2 = TREE_TYPE (t); |
762f7d9d TT |
3535 | TREE_CODE (t2) == POINTER_TYPE; |
3536 | t2 = TREE_TYPE (t2)) | |
3537 | ; | |
9f63daea | 3538 | if (TREE_CODE (t2) != RECORD_TYPE |
762f7d9d TT |
3539 | && TREE_CODE (t2) != ENUMERAL_TYPE |
3540 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
3541 | && TREE_CODE (t2) != UNION_TYPE) | |
3542 | return -1; | |
6de9cd9a | 3543 | if (TYPE_SIZE (t2) == 0) |
762f7d9d | 3544 | return -1; |
6de9cd9a DN |
3545 | } |
3546 | /* These are the only cases that need special handling. */ | |
9f63daea | 3547 | if (TREE_CODE (t) != RECORD_TYPE |
6de9cd9a DN |
3548 | && TREE_CODE (t) != ENUMERAL_TYPE |
3549 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
3550 | && TREE_CODE (t) != UNION_TYPE | |
3551 | && TREE_CODE (t) != POINTER_TYPE) | |
3552 | return -1; | |
3553 | /* Undefined? */ | |
3554 | if (TYPE_SIZE (t) == 0) | |
3555 | return -1; | |
3556 | ||
9f63daea | 3557 | /* Look up t in hash table. Only one of the compatible types within each |
6de9cd9a DN |
3558 | alias set is recorded in the table. */ |
3559 | if (!type_hash_table) | |
4fe52ce9 | 3560 | type_hash_table = htab_create_ggc (1021, c_type_hash, |
6de9cd9a DN |
3561 | (htab_eq) lang_hooks.types_compatible_p, |
3562 | NULL); | |
3563 | slot = htab_find_slot (type_hash_table, t, INSERT); | |
3564 | if (*slot != NULL) | |
6a3203c8 AP |
3565 | { |
3566 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
3567 | return TYPE_ALIAS_SET ((tree)*slot); | |
3568 | } | |
6de9cd9a DN |
3569 | else |
3570 | /* Our caller will assign and record (in t) a new alias set; all we need | |
3571 | to do is remember t in the hash table. */ | |
3572 | *slot = t; | |
3573 | ||
3bdf5ad1 | 3574 | return -1; |
41472af8 | 3575 | } |
0213a355 | 3576 | \f |
fa72b064 | 3577 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where the |
ea793912 GDR |
3578 | second parameter indicates which OPERATOR is being applied. The COMPLAIN |
3579 | flag controls whether we should diagnose possibly ill-formed | |
3580 | constructs or not. */ | |
03a08664 | 3581 | |
0213a355 | 3582 | tree |
03a08664 | 3583 | c_sizeof_or_alignof_type (tree type, bool is_sizeof, int complain) |
0213a355 | 3584 | { |
fa72b064 GDR |
3585 | const char *op_name; |
3586 | tree value = NULL; | |
3587 | enum tree_code type_code = TREE_CODE (type); | |
35b1a6fa | 3588 | |
03a08664 | 3589 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
35b1a6fa | 3590 | |
fa72b064 | 3591 | if (type_code == FUNCTION_TYPE) |
0213a355 | 3592 | { |
03a08664 | 3593 | if (is_sizeof) |
fa72b064 | 3594 | { |
ea793912 | 3595 | if (complain && (pedantic || warn_pointer_arith)) |
bda67431 | 3596 | pedwarn ("invalid application of %<sizeof%> to a function type"); |
5ade1ed2 DG |
3597 | else if (!complain) |
3598 | return error_mark_node; | |
fa72b064 GDR |
3599 | value = size_one_node; |
3600 | } | |
3601 | else | |
3602 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
3603 | } | |
3604 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
3605 | { | |
35b1a6fa | 3606 | if (type_code == VOID_TYPE |
ea793912 | 3607 | && complain && (pedantic || warn_pointer_arith)) |
bda67431 | 3608 | pedwarn ("invalid application of %qs to a void type", op_name); |
5ade1ed2 DG |
3609 | else if (!complain) |
3610 | return error_mark_node; | |
fa72b064 | 3611 | value = size_one_node; |
0213a355 | 3612 | } |
0213a355 JM |
3613 | else if (!COMPLETE_TYPE_P (type)) |
3614 | { | |
ea793912 | 3615 | if (complain) |
bda67431 | 3616 | error ("invalid application of %qs to incomplete type %qT ", |
d5a10cf0 | 3617 | op_name, type); |
fa72b064 | 3618 | value = size_zero_node; |
0213a355 JM |
3619 | } |
3620 | else | |
fa72b064 | 3621 | { |
03a08664 | 3622 | if (is_sizeof) |
fa72b064 GDR |
3623 | /* Convert in case a char is more than one unit. */ |
3624 | value = size_binop (CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), | |
3625 | size_int (TYPE_PRECISION (char_type_node) | |
3626 | / BITS_PER_UNIT)); | |
3627 | else | |
a4e9ffe5 | 3628 | value = size_int (TYPE_ALIGN_UNIT (type)); |
fa72b064 | 3629 | } |
0213a355 | 3630 | |
fa72b064 GDR |
3631 | /* VALUE will have an integer type with TYPE_IS_SIZETYPE set. |
3632 | TYPE_IS_SIZETYPE means that certain things (like overflow) will | |
3633 | never happen. However, this node should really have type | |
3634 | `size_t', which is just a typedef for an ordinary integer type. */ | |
4c7a6c1b | 3635 | value = fold_convert (size_type_node, value); |
4094f4d2 | 3636 | gcc_assert (!TYPE_IS_SIZETYPE (TREE_TYPE (value))); |
35b1a6fa | 3637 | |
fa72b064 | 3638 | return value; |
0213a355 JM |
3639 | } |
3640 | ||
3641 | /* Implement the __alignof keyword: Return the minimum required | |
837edd5f GK |
3642 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
3643 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
3644 | from an "aligned" __attribute__ specification). */ | |
7f4edbcb | 3645 | |
0213a355 | 3646 | tree |
35b1a6fa | 3647 | c_alignof_expr (tree expr) |
0213a355 JM |
3648 | { |
3649 | tree t; | |
3650 | ||
837edd5f | 3651 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
a4e9ffe5 | 3652 | t = size_int (DECL_ALIGN_UNIT (expr)); |
35b1a6fa | 3653 | |
0213a355 JM |
3654 | else if (TREE_CODE (expr) == COMPONENT_REF |
3655 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
3656 | { | |
bda67431 | 3657 | error ("%<__alignof%> applied to a bit-field"); |
0213a355 JM |
3658 | t = size_one_node; |
3659 | } | |
3660 | else if (TREE_CODE (expr) == COMPONENT_REF | |
173bf5be | 3661 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
a4e9ffe5 | 3662 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
35b1a6fa | 3663 | |
0213a355 JM |
3664 | else if (TREE_CODE (expr) == INDIRECT_REF) |
3665 | { | |
3666 | tree t = TREE_OPERAND (expr, 0); | |
3667 | tree best = t; | |
3668 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
35b1a6fa | 3669 | |
1043771b | 3670 | while (CONVERT_EXPR_P (t) |
173bf5be | 3671 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
0213a355 JM |
3672 | { |
3673 | int thisalign; | |
3674 | ||
3675 | t = TREE_OPERAND (t, 0); | |
3676 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
3677 | if (thisalign > bestalign) | |
3678 | best = t, bestalign = thisalign; | |
3679 | } | |
3680 | return c_alignof (TREE_TYPE (TREE_TYPE (best))); | |
3681 | } | |
3682 | else | |
3683 | return c_alignof (TREE_TYPE (expr)); | |
3684 | ||
4c7a6c1b | 3685 | return fold_convert (size_type_node, t); |
0213a355 JM |
3686 | } |
3687 | \f | |
df061a43 RS |
3688 | /* Handle C and C++ default attributes. */ |
3689 | ||
3690 | enum built_in_attribute | |
3691 | { | |
3692 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
3693 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
3694 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, | |
3695 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
df061a43 RS |
3696 | #include "builtin-attrs.def" |
3697 | #undef DEF_ATTR_NULL_TREE | |
3698 | #undef DEF_ATTR_INT | |
3699 | #undef DEF_ATTR_IDENT | |
3700 | #undef DEF_ATTR_TREE_LIST | |
df061a43 RS |
3701 | ATTR_LAST |
3702 | }; | |
3703 | ||
3704 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
3705 | ||
35b1a6fa | 3706 | static void c_init_attributes (void); |
df061a43 | 3707 | |
a0274e3e | 3708 | enum c_builtin_type |
7f4edbcb | 3709 | { |
10841285 MM |
3710 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
3711 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
3712 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
3713 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
3714 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
3715 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
10a0d495 | 3716 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
a0274e3e JJ |
3717 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6) NAME, |
3718 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7) NAME, | |
10841285 MM |
3719 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
3720 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
3721 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
08291658 | 3722 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
10a0d495 JJ |
3723 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
3724 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG6) \ | |
3725 | NAME, | |
10841285 MM |
3726 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
3727 | #include "builtin-types.def" | |
3728 | #undef DEF_PRIMITIVE_TYPE | |
3729 | #undef DEF_FUNCTION_TYPE_0 | |
3730 | #undef DEF_FUNCTION_TYPE_1 | |
3731 | #undef DEF_FUNCTION_TYPE_2 | |
3732 | #undef DEF_FUNCTION_TYPE_3 | |
3733 | #undef DEF_FUNCTION_TYPE_4 | |
10a0d495 JJ |
3734 | #undef DEF_FUNCTION_TYPE_5 |
3735 | #undef DEF_FUNCTION_TYPE_6 | |
a0274e3e | 3736 | #undef DEF_FUNCTION_TYPE_7 |
10841285 MM |
3737 | #undef DEF_FUNCTION_TYPE_VAR_0 |
3738 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
3739 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
08291658 | 3740 | #undef DEF_FUNCTION_TYPE_VAR_3 |
10a0d495 JJ |
3741 | #undef DEF_FUNCTION_TYPE_VAR_4 |
3742 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
10841285 | 3743 | #undef DEF_POINTER_TYPE |
a0274e3e JJ |
3744 | BT_LAST |
3745 | }; | |
3746 | ||
3747 | typedef enum c_builtin_type builtin_type; | |
10841285 | 3748 | |
a0274e3e JJ |
3749 | /* A temporary array for c_common_nodes_and_builtins. Used in |
3750 | communication with def_fn_type. */ | |
3751 | static tree builtin_types[(int) BT_LAST + 1]; | |
10841285 | 3752 | |
a0274e3e JJ |
3753 | /* A helper function for c_common_nodes_and_builtins. Build function type |
3754 | for DEF with return type RET and N arguments. If VAR is true, then the | |
3755 | function should be variadic after those N arguments. | |
3756 | ||
3757 | Takes special care not to ICE if any of the types involved are | |
3758 | error_mark_node, which indicates that said type is not in fact available | |
3759 | (see builtin_type_for_size). In which case the function type as a whole | |
3760 | should be error_mark_node. */ | |
3761 | ||
3762 | static void | |
3763 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
3764 | { | |
3765 | tree args = NULL, t; | |
3766 | va_list list; | |
3767 | int i; | |
3768 | ||
3769 | va_start (list, n); | |
3770 | for (i = 0; i < n; ++i) | |
3771 | { | |
d75d71e0 | 3772 | builtin_type a = (builtin_type) va_arg (list, int); |
a0274e3e JJ |
3773 | t = builtin_types[a]; |
3774 | if (t == error_mark_node) | |
3775 | goto egress; | |
3776 | args = tree_cons (NULL_TREE, t, args); | |
3777 | } | |
3778 | va_end (list); | |
3779 | ||
3780 | args = nreverse (args); | |
3781 | if (!var) | |
3782 | args = chainon (args, void_list_node); | |
3783 | ||
3784 | t = builtin_types[ret]; | |
3785 | if (t == error_mark_node) | |
3786 | goto egress; | |
3787 | t = build_function_type (t, args); | |
3788 | ||
3789 | egress: | |
3790 | builtin_types[def] = t; | |
3791 | } | |
3792 | ||
c6d86fce ILT |
3793 | /* Build builtin functions common to both C and C++ language |
3794 | frontends. */ | |
3795 | ||
3796 | static void | |
3797 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
3798 | { | |
3799 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
3800 | builtin_types[ENUM] = VALUE; | |
3801 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
3802 | def_fn_type (ENUM, RETURN, 0, 0); | |
3803 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
3804 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
3805 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
3806 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
3807 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
3808 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
3809 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
3810 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
3811 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
3812 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
3813 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3814 | ARG6) \ | |
3815 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
3816 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
3817 | ARG6, ARG7) \ | |
3818 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
3819 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ | |
3820 | def_fn_type (ENUM, RETURN, 1, 0); | |
3821 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
3822 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
3823 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
3824 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
3825 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
3826 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
3827 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
3828 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
3829 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
3830 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
3831 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ | |
3832 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
3833 | ||
3834 | #include "builtin-types.def" | |
3835 | ||
3836 | #undef DEF_PRIMITIVE_TYPE | |
3837 | #undef DEF_FUNCTION_TYPE_1 | |
3838 | #undef DEF_FUNCTION_TYPE_2 | |
3839 | #undef DEF_FUNCTION_TYPE_3 | |
3840 | #undef DEF_FUNCTION_TYPE_4 | |
3841 | #undef DEF_FUNCTION_TYPE_5 | |
3842 | #undef DEF_FUNCTION_TYPE_6 | |
3843 | #undef DEF_FUNCTION_TYPE_VAR_0 | |
3844 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
3845 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
3846 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
3847 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
3848 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
3849 | #undef DEF_POINTER_TYPE | |
3850 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
3851 | ||
3852 | c_init_attributes (); | |
3853 | ||
3854 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
3855 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
3856 | if (NAME && COND) \ | |
3857 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
3858 | builtin_types[(int) TYPE], \ | |
3859 | builtin_types[(int) LIBTYPE], \ | |
3860 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
3861 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
3862 | #include "builtins.def" | |
3863 | #undef DEF_BUILTIN | |
3864 | ||
8de7ef2a UB |
3865 | targetm.init_builtins (); |
3866 | ||
c6d86fce ILT |
3867 | build_common_builtin_nodes (); |
3868 | ||
c6d86fce ILT |
3869 | if (flag_mudflap) |
3870 | mudflap_init (); | |
3871 | } | |
3872 | ||
a0274e3e JJ |
3873 | /* Build tree nodes and builtin functions common to both C and C++ language |
3874 | frontends. */ | |
3875 | ||
3876 | void | |
3877 | c_common_nodes_and_builtins (void) | |
3878 | { | |
b6baa67d KVH |
3879 | int char16_type_size; |
3880 | int char32_type_size; | |
eaa7c03f JM |
3881 | int wchar_type_size; |
3882 | tree array_domain_type; | |
9f720c3e | 3883 | tree va_list_ref_type_node; |
daf68dd7 | 3884 | tree va_list_arg_type_node; |
d3707adb | 3885 | |
eaa7c03f | 3886 | /* Define `int' and `char' first so that dbx will output them first. */ |
6496a589 | 3887 | record_builtin_type (RID_INT, NULL, integer_type_node); |
eaa7c03f JM |
3888 | record_builtin_type (RID_CHAR, "char", char_type_node); |
3889 | ||
3890 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
3891 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
3892 | but not C. Are the conditionals here needed? */ | |
37fa72e9 | 3893 | if (c_dialect_cxx ()) |
6496a589 | 3894 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
eaa7c03f JM |
3895 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
3896 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
3897 | record_builtin_type (RID_MAX, "long unsigned int", | |
3898 | long_unsigned_type_node); | |
37fa72e9 | 3899 | if (c_dialect_cxx ()) |
eaa7c03f JM |
3900 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
3901 | record_builtin_type (RID_MAX, "long long int", | |
3902 | long_long_integer_type_node); | |
3903 | record_builtin_type (RID_MAX, "long long unsigned int", | |
3904 | long_long_unsigned_type_node); | |
37fa72e9 | 3905 | if (c_dialect_cxx ()) |
eaa7c03f JM |
3906 | record_builtin_type (RID_MAX, "long long unsigned", |
3907 | long_long_unsigned_type_node); | |
3908 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
3909 | record_builtin_type (RID_MAX, "short unsigned int", | |
3910 | short_unsigned_type_node); | |
37fa72e9 | 3911 | if (c_dialect_cxx ()) |
eaa7c03f JM |
3912 | record_builtin_type (RID_MAX, "unsigned short", |
3913 | short_unsigned_type_node); | |
3914 | ||
3915 | /* Define both `signed char' and `unsigned char'. */ | |
3916 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
3917 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
3918 | ||
b0c48229 NB |
3919 | /* These are types that c_common_type_for_size and |
3920 | c_common_type_for_mode use. */ | |
ae2bcd98 RS |
3921 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
3922 | intQI_type_node)); | |
3923 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3924 | intHI_type_node)); | |
3925 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3926 | intSI_type_node)); | |
3927 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3928 | intDI_type_node)); | |
eaa7c03f | 3929 | #if HOST_BITS_PER_WIDE_INT >= 64 |
1e1b8649 AP |
3930 | if (targetm.scalar_mode_supported_p (TImode)) |
3931 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
3932 | get_identifier ("__int128_t"), | |
3933 | intTI_type_node)); | |
eaa7c03f | 3934 | #endif |
ae2bcd98 RS |
3935 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
3936 | unsigned_intQI_type_node)); | |
3937 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3938 | unsigned_intHI_type_node)); | |
3939 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3940 | unsigned_intSI_type_node)); | |
3941 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
3942 | unsigned_intDI_type_node)); | |
eaa7c03f | 3943 | #if HOST_BITS_PER_WIDE_INT >= 64 |
1e1b8649 AP |
3944 | if (targetm.scalar_mode_supported_p (TImode)) |
3945 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
3946 | get_identifier ("__uint128_t"), | |
3947 | unsigned_intTI_type_node)); | |
eaa7c03f JM |
3948 | #endif |
3949 | ||
3950 | /* Create the widest literal types. */ | |
3951 | widest_integer_literal_type_node | |
3952 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
ae2bcd98 RS |
3953 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
3954 | widest_integer_literal_type_node)); | |
eaa7c03f JM |
3955 | |
3956 | widest_unsigned_literal_type_node | |
3957 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
ae2bcd98 RS |
3958 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
3959 | widest_unsigned_literal_type_node)); | |
eaa7c03f JM |
3960 | |
3961 | /* `unsigned long' is the standard type for sizeof. | |
3962 | Note that stddef.h uses `unsigned long', | |
3963 | and this must agree, even if long and int are the same size. */ | |
c9f8536c | 3964 | size_type_node = |
eaa7c03f | 3965 | TREE_TYPE (identifier_global_value (get_identifier (SIZE_TYPE))); |
c9f8536c MM |
3966 | signed_size_type_node = c_common_signed_type (size_type_node); |
3967 | set_sizetype (size_type_node); | |
eaa7c03f | 3968 | |
d1c38823 ZD |
3969 | pid_type_node = |
3970 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
3971 | ||
eaa7c03f JM |
3972 | build_common_tree_nodes_2 (flag_short_double); |
3973 | ||
6496a589 KG |
3974 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
3975 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
eaa7c03f JM |
3976 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
3977 | ||
9a8ce21f JG |
3978 | /* Only supported decimal floating point extension if the target |
3979 | actually supports underlying modes. */ | |
3980 | if (targetm.scalar_mode_supported_p (SDmode) | |
3981 | && targetm.scalar_mode_supported_p (DDmode) | |
3982 | && targetm.scalar_mode_supported_p (TDmode)) | |
3983 | { | |
3984 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
3985 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
3986 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
3987 | } | |
3988 | ||
ab22c1fa CF |
3989 | if (targetm.fixed_point_supported_p ()) |
3990 | { | |
3991 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
3992 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
3993 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
3994 | record_builtin_type (RID_MAX, "long long _Fract", | |
3995 | long_long_fract_type_node); | |
3996 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
3997 | unsigned_short_fract_type_node); | |
3998 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
3999 | unsigned_fract_type_node); | |
4000 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
4001 | unsigned_long_fract_type_node); | |
4002 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
4003 | unsigned_long_long_fract_type_node); | |
4004 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
4005 | sat_short_fract_type_node); | |
4006 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
4007 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
4008 | sat_long_fract_type_node); | |
4009 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
4010 | sat_long_long_fract_type_node); | |
4011 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
4012 | sat_unsigned_short_fract_type_node); | |
4013 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
4014 | sat_unsigned_fract_type_node); | |
4015 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
4016 | sat_unsigned_long_fract_type_node); | |
4017 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
4018 | sat_unsigned_long_long_fract_type_node); | |
4019 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
4020 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
4021 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
4022 | record_builtin_type (RID_MAX, "long long _Accum", | |
4023 | long_long_accum_type_node); | |
4024 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
4025 | unsigned_short_accum_type_node); | |
4026 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
4027 | unsigned_accum_type_node); | |
4028 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
4029 | unsigned_long_accum_type_node); | |
4030 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
4031 | unsigned_long_long_accum_type_node); | |
4032 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
4033 | sat_short_accum_type_node); | |
4034 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
4035 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
4036 | sat_long_accum_type_node); | |
4037 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
4038 | sat_long_long_accum_type_node); | |
4039 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
4040 | sat_unsigned_short_accum_type_node); | |
4041 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
4042 | sat_unsigned_accum_type_node); | |
4043 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
4044 | sat_unsigned_long_accum_type_node); | |
4045 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
4046 | sat_unsigned_long_long_accum_type_node); | |
4047 | ||
4048 | } | |
4049 | ||
ae2bcd98 RS |
4050 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, |
4051 | get_identifier ("complex int"), | |
4052 | complex_integer_type_node)); | |
4053 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4054 | get_identifier ("complex float"), | |
4055 | complex_float_type_node)); | |
4056 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4057 | get_identifier ("complex double"), | |
4058 | complex_double_type_node)); | |
4059 | lang_hooks.decls.pushdecl | |
43577e6b NB |
4060 | (build_decl (TYPE_DECL, get_identifier ("complex long double"), |
4061 | complex_long_double_type_node)); | |
eaa7c03f | 4062 | |
498c0f27 JJ |
4063 | if (c_dialect_cxx ()) |
4064 | /* For C++, make fileptr_type_node a distinct void * type until | |
4065 | FILE type is defined. */ | |
8dd16ecc | 4066 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
498c0f27 | 4067 | |
6496a589 | 4068 | record_builtin_type (RID_VOID, NULL, void_type_node); |
eaa7c03f | 4069 | |
06d40de8 DG |
4070 | /* Set the TYPE_NAME for any variants that were built before |
4071 | record_builtin_type gave names to the built-in types. */ | |
4072 | { | |
4073 | tree void_name = TYPE_NAME (void_type_node); | |
4074 | TYPE_NAME (void_type_node) = NULL_TREE; | |
4075 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
4076 | = void_name; | |
4077 | TYPE_NAME (void_type_node) = void_name; | |
4078 | } | |
4079 | ||
8c27b7d4 | 4080 | /* This node must not be shared. */ |
4a90aeeb | 4081 | void_zero_node = make_node (INTEGER_CST); |
10841285 MM |
4082 | TREE_TYPE (void_zero_node) = void_type_node; |
4083 | ||
eaa7c03f JM |
4084 | void_list_node = build_void_list_node (); |
4085 | ||
4086 | /* Make a type to be the domain of a few array types | |
4087 | whose domains don't really matter. | |
4088 | 200 is small enough that it always fits in size_t | |
4089 | and large enough that it can hold most function names for the | |
4090 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
4091 | array_domain_type = build_index_type (size_int (200)); | |
4092 | ||
4093 | /* Make a type for arrays of characters. | |
4094 | With luck nothing will ever really depend on the length of this | |
4095 | array type. */ | |
4096 | char_array_type_node | |
4097 | = build_array_type (char_type_node, array_domain_type); | |
4098 | ||
4099 | /* Likewise for arrays of ints. */ | |
4100 | int_array_type_node | |
4101 | = build_array_type (integer_type_node, array_domain_type); | |
4102 | ||
10841285 MM |
4103 | string_type_node = build_pointer_type (char_type_node); |
4104 | const_string_type_node | |
4105 | = build_pointer_type (build_qualified_type | |
4106 | (char_type_node, TYPE_QUAL_CONST)); | |
4107 | ||
eaa7c03f | 4108 | /* This is special for C++ so functions can be overloaded. */ |
a11eba95 | 4109 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
eaa7c03f JM |
4110 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
4111 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
37fa72e9 | 4112 | if (c_dialect_cxx ()) |
eaa7c03f | 4113 | { |
8df83eae | 4114 | if (TYPE_UNSIGNED (wchar_type_node)) |
eaa7c03f JM |
4115 | wchar_type_node = make_unsigned_type (wchar_type_size); |
4116 | else | |
4117 | wchar_type_node = make_signed_type (wchar_type_size); | |
4118 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
4119 | } | |
4120 | else | |
4121 | { | |
ceef8ce4 | 4122 | signed_wchar_type_node = c_common_signed_type (wchar_type_node); |
12753674 | 4123 | unsigned_wchar_type_node = c_common_unsigned_type (wchar_type_node); |
eaa7c03f JM |
4124 | } |
4125 | ||
4126 | /* This is for wide string constants. */ | |
4127 | wchar_array_type_node | |
4128 | = build_array_type (wchar_type_node, array_domain_type); | |
4129 | ||
b6baa67d KVH |
4130 | /* Define 'char16_t'. */ |
4131 | char16_type_node = get_identifier (CHAR16_TYPE); | |
4132 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
4133 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
4134 | if (c_dialect_cxx ()) | |
4135 | { | |
4136 | char16_type_node = make_unsigned_type (char16_type_size); | |
4137 | ||
4138 | if (cxx_dialect == cxx0x) | |
4139 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); | |
4140 | } | |
4141 | ||
4142 | /* This is for UTF-16 string constants. */ | |
4143 | char16_array_type_node | |
4144 | = build_array_type (char16_type_node, array_domain_type); | |
4145 | ||
4146 | /* Define 'char32_t'. */ | |
4147 | char32_type_node = get_identifier (CHAR32_TYPE); | |
4148 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
4149 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
4150 | if (c_dialect_cxx ()) | |
4151 | { | |
4152 | char32_type_node = make_unsigned_type (char32_type_size); | |
4153 | ||
4154 | if (cxx_dialect == cxx0x) | |
4155 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); | |
4156 | } | |
4157 | ||
4158 | /* This is for UTF-32 string constants. */ | |
4159 | char32_array_type_node | |
4160 | = build_array_type (char32_type_node, array_domain_type); | |
4161 | ||
5fd8e536 JM |
4162 | wint_type_node = |
4163 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
4164 | ||
4165 | intmax_type_node = | |
4166 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
4167 | uintmax_type_node = | |
4168 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
4169 | ||
4170 | default_function_type = build_function_type (integer_type_node, NULL_TREE); | |
4171 | ptrdiff_type_node | |
4172 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
12753674 | 4173 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
5fd8e536 | 4174 | |
ae2bcd98 | 4175 | lang_hooks.decls.pushdecl |
43577e6b NB |
4176 | (build_decl (TYPE_DECL, get_identifier ("__builtin_va_list"), |
4177 | va_list_type_node)); | |
35cbb299 KT |
4178 | #ifdef TARGET_ENUM_VA_LIST |
4179 | { | |
4180 | int l; | |
4181 | const char *pname; | |
4182 | tree ptype; | |
4183 | for (l = 0; TARGET_ENUM_VA_LIST (l, &pname, &ptype); ++l) | |
4184 | { | |
4185 | lang_hooks.decls.pushdecl | |
4186 | (build_decl (TYPE_DECL, get_identifier (pname), | |
4187 | ptype)); | |
4188 | ||
4189 | } | |
4190 | } | |
4191 | #endif | |
daf68dd7 | 4192 | |
daf68dd7 | 4193 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
9f720c3e GK |
4194 | { |
4195 | va_list_arg_type_node = va_list_ref_type_node = | |
4196 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
4197 | } | |
daf68dd7 | 4198 | else |
9f720c3e GK |
4199 | { |
4200 | va_list_arg_type_node = va_list_type_node; | |
4201 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
4202 | } | |
35b1a6fa | 4203 | |
c6d86fce ILT |
4204 | if (!flag_preprocess_only) |
4205 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
4677862a | 4206 | |
5b47282c | 4207 | main_identifier_node = get_identifier ("main"); |
b2f97e4a MM |
4208 | |
4209 | /* Create the built-in __null node. It is important that this is | |
4210 | not shared. */ | |
4211 | null_node = make_node (INTEGER_CST); | |
4212 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); | |
a0274e3e JJ |
4213 | |
4214 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
4215 | memset (builtin_types, 0, sizeof (builtin_types)); | |
7f4edbcb | 4216 | } |
d3707adb | 4217 | |
b482789c MA |
4218 | /* Look up the function in built_in_decls that corresponds to DECL |
4219 | and set ASMSPEC as its user assembler name. DECL must be a | |
6c6cfbfd | 4220 | function decl that declares a builtin. */ |
b482789c MA |
4221 | |
4222 | void | |
4223 | set_builtin_user_assembler_name (tree decl, const char *asmspec) | |
4224 | { | |
4225 | tree builtin; | |
4226 | gcc_assert (TREE_CODE (decl) == FUNCTION_DECL | |
4227 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
4228 | && asmspec != 0); | |
4229 | ||
4230 | builtin = built_in_decls [DECL_FUNCTION_CODE (decl)]; | |
4231 | set_user_assembler_name (builtin, asmspec); | |
4232 | if (DECL_FUNCTION_CODE (decl) == BUILT_IN_MEMCPY) | |
4233 | init_block_move_fn (asmspec); | |
4234 | else if (DECL_FUNCTION_CODE (decl) == BUILT_IN_MEMSET) | |
4235 | init_block_clear_fn (asmspec); | |
4236 | } | |
4237 | ||
3b2db49f MM |
4238 | /* The number of named compound-literals generated thus far. */ |
4239 | static GTY(()) int compound_literal_number; | |
4240 | ||
4241 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
4242 | ||
4243 | void | |
4244 | set_compound_literal_name (tree decl) | |
4245 | { | |
4246 | char *name; | |
4247 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
4248 | compound_literal_number); | |
4249 | compound_literal_number++; | |
4250 | DECL_NAME (decl) = get_identifier (name); | |
4251 | } | |
4252 | ||
d3707adb | 4253 | tree |
35b1a6fa | 4254 | build_va_arg (tree expr, tree type) |
d3707adb RH |
4255 | { |
4256 | return build1 (VA_ARG_EXPR, type, expr); | |
4257 | } | |
fc2aaf30 JM |
4258 | |
4259 | ||
7d14c755 JM |
4260 | /* Linked list of disabled built-in functions. */ |
4261 | ||
4262 | typedef struct disabled_builtin | |
4263 | { | |
4264 | const char *name; | |
4265 | struct disabled_builtin *next; | |
4266 | } disabled_builtin; | |
4267 | static disabled_builtin *disabled_builtins = NULL; | |
4268 | ||
35b1a6fa | 4269 | static bool builtin_function_disabled_p (const char *); |
7d14c755 JM |
4270 | |
4271 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
4272 | begins with "__builtin_", give an error. */ | |
4273 | ||
4274 | void | |
35b1a6fa | 4275 | disable_builtin_function (const char *name) |
7d14c755 JM |
4276 | { |
4277 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
bda67431 | 4278 | error ("cannot disable built-in function %qs", name); |
7d14c755 JM |
4279 | else |
4280 | { | |
1ad463f4 BI |
4281 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
4282 | new_disabled_builtin->name = name; | |
4283 | new_disabled_builtin->next = disabled_builtins; | |
4284 | disabled_builtins = new_disabled_builtin; | |
7d14c755 JM |
4285 | } |
4286 | } | |
4287 | ||
4288 | ||
4289 | /* Return true if the built-in function NAME has been disabled, false | |
4290 | otherwise. */ | |
4291 | ||
4292 | static bool | |
35b1a6fa | 4293 | builtin_function_disabled_p (const char *name) |
7d14c755 JM |
4294 | { |
4295 | disabled_builtin *p; | |
4296 | for (p = disabled_builtins; p != NULL; p = p->next) | |
4297 | { | |
4298 | if (strcmp (name, p->name) == 0) | |
4299 | return true; | |
4300 | } | |
4301 | return false; | |
4302 | } | |
4303 | ||
4304 | ||
9bc15050 RG |
4305 | /* Worker for DEF_BUILTIN. |
4306 | Possibly define a builtin function with one or two names. | |
4307 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
4308 | nonansi_p and flag_no_nonansi_builtin. */ | |
fc2aaf30 | 4309 | |
9bc15050 RG |
4310 | static void |
4311 | def_builtin_1 (enum built_in_function fncode, | |
4312 | const char *name, | |
4313 | enum built_in_class fnclass, | |
4314 | tree fntype, tree libtype, | |
4315 | bool both_p, bool fallback_p, bool nonansi_p, | |
4316 | tree fnattrs, bool implicit_p) | |
fc2aaf30 | 4317 | { |
9bc15050 RG |
4318 | tree decl; |
4319 | const char *libname; | |
4320 | ||
a0274e3e JJ |
4321 | if (fntype == error_mark_node) |
4322 | return; | |
4323 | ||
9bc15050 RG |
4324 | gcc_assert ((!both_p && !fallback_p) |
4325 | || !strncmp (name, "__builtin_", | |
4326 | strlen ("__builtin_"))); | |
4327 | ||
4328 | libname = name + strlen ("__builtin_"); | |
c79efc4d RÁE |
4329 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
4330 | (fallback_p ? libname : NULL), | |
4331 | fnattrs); | |
9bc15050 RG |
4332 | if (both_p |
4333 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
7d14c755 | 4334 | && !(nonansi_p && flag_no_nonansi_builtin)) |
c79efc4d RÁE |
4335 | add_builtin_function (libname, libtype, fncode, fnclass, |
4336 | NULL, fnattrs); | |
7f685e17 | 4337 | |
9bc15050 RG |
4338 | built_in_decls[(int) fncode] = decl; |
4339 | if (implicit_p) | |
4340 | implicit_built_in_decls[(int) fncode] = decl; | |
fc2aaf30 | 4341 | } |
c530479e | 4342 | \f |
d72040f5 RH |
4343 | /* Nonzero if the type T promotes to int. This is (nearly) the |
4344 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
4345 | ||
4346 | bool | |
58f9752a | 4347 | c_promoting_integer_type_p (const_tree t) |
d72040f5 RH |
4348 | { |
4349 | switch (TREE_CODE (t)) | |
4350 | { | |
4351 | case INTEGER_TYPE: | |
4352 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
4353 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
4354 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
4355 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
c6c04fca RL |
4356 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
4357 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d72040f5 RH |
4358 | |
4359 | case ENUMERAL_TYPE: | |
4360 | /* ??? Technically all enumerations not larger than an int | |
4361 | promote to an int. But this is used along code paths | |
4362 | that only want to notice a size change. */ | |
4363 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
4364 | ||
4365 | case BOOLEAN_TYPE: | |
4366 | return 1; | |
4367 | ||
4368 | default: | |
4369 | return 0; | |
4370 | } | |
4371 | } | |
4372 | ||
c530479e RH |
4373 | /* Return 1 if PARMS specifies a fixed number of parameters |
4374 | and none of their types is affected by default promotions. */ | |
4375 | ||
4376 | int | |
58f9752a | 4377 | self_promoting_args_p (const_tree parms) |
c530479e | 4378 | { |
58f9752a | 4379 | const_tree t; |
c530479e RH |
4380 | for (t = parms; t; t = TREE_CHAIN (t)) |
4381 | { | |
b3694847 | 4382 | tree type = TREE_VALUE (t); |
7e8176d7 | 4383 | |
694fea20 VR |
4384 | if (type == error_mark_node) |
4385 | continue; | |
4386 | ||
c530479e RH |
4387 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
4388 | return 0; | |
4389 | ||
4390 | if (type == 0) | |
4391 | return 0; | |
4392 | ||
4393 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
4394 | return 0; | |
4395 | ||
d72040f5 | 4396 | if (c_promoting_integer_type_p (type)) |
c530479e RH |
4397 | return 0; |
4398 | } | |
4399 | return 1; | |
4400 | } | |
5eda3d66 | 4401 | |
12ea3302 GDR |
4402 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
4403 | tree | |
4404 | strip_pointer_operator (tree t) | |
4405 | { | |
4406 | while (POINTER_TYPE_P (t)) | |
4407 | t = TREE_TYPE (t); | |
4408 | return t; | |
4409 | } | |
4410 | ||
ba992967 SP |
4411 | /* Recursively remove pointer or array type from TYPE. */ |
4412 | tree | |
4413 | strip_pointer_or_array_types (tree t) | |
4414 | { | |
4415 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
4416 | t = TREE_TYPE (t); | |
4417 | return t; | |
4418 | } | |
4419 | ||
8f17b5c5 MM |
4420 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
4421 | representing case labels, or NULL_TREE for a `default' label. | |
4422 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
4423 | K2, and 0 if K1 and K2 are equal. */ | |
4424 | ||
4425 | int | |
35b1a6fa | 4426 | case_compare (splay_tree_key k1, splay_tree_key k2) |
8f17b5c5 MM |
4427 | { |
4428 | /* Consider a NULL key (such as arises with a `default' label) to be | |
4429 | smaller than anything else. */ | |
4430 | if (!k1) | |
4431 | return k2 ? -1 : 0; | |
4432 | else if (!k2) | |
4433 | return k1 ? 1 : 0; | |
4434 | ||
4435 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
4436 | } | |
4437 | ||
4438 | /* Process a case label for the range LOW_VALUE ... HIGH_VALUE. If | |
4439 | LOW_VALUE and HIGH_VALUE are both NULL_TREE then this case label is | |
4440 | actually a `default' label. If only HIGH_VALUE is NULL_TREE, then | |
4441 | case label was declared using the usual C/C++ syntax, rather than | |
4442 | the GNU case range extension. CASES is a tree containing all the | |
4443 | case ranges processed so far; COND is the condition for the | |
8c161995 RH |
4444 | switch-statement itself. Returns the CASE_LABEL_EXPR created, or |
4445 | ERROR_MARK_NODE if no CASE_LABEL_EXPR is created. */ | |
8f17b5c5 MM |
4446 | |
4447 | tree | |
a6c0a76c SB |
4448 | c_add_case_label (splay_tree cases, tree cond, tree orig_type, |
4449 | tree low_value, tree high_value) | |
8f17b5c5 MM |
4450 | { |
4451 | tree type; | |
4452 | tree label; | |
4453 | tree case_label; | |
4454 | splay_tree_node node; | |
4455 | ||
4456 | /* Create the LABEL_DECL itself. */ | |
6de9cd9a | 4457 | label = create_artificial_label (); |
8f17b5c5 MM |
4458 | |
4459 | /* If there was an error processing the switch condition, bail now | |
4460 | before we get more confused. */ | |
4461 | if (!cond || cond == error_mark_node) | |
6de9cd9a | 4462 | goto error_out; |
8f17b5c5 | 4463 | |
35b1a6fa AJ |
4464 | if ((low_value && TREE_TYPE (low_value) |
4465 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
8f17b5c5 MM |
4466 | || (high_value && TREE_TYPE (high_value) |
4467 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
522ddfa2 JM |
4468 | { |
4469 | error ("pointers are not permitted as case values"); | |
4470 | goto error_out; | |
4471 | } | |
8f17b5c5 MM |
4472 | |
4473 | /* Case ranges are a GNU extension. */ | |
4474 | if (high_value && pedantic) | |
37fa72e9 | 4475 | pedwarn ("range expressions in switch statements are non-standard"); |
8f17b5c5 MM |
4476 | |
4477 | type = TREE_TYPE (cond); | |
4478 | if (low_value) | |
4479 | { | |
4480 | low_value = check_case_value (low_value); | |
4481 | low_value = convert_and_check (type, low_value); | |
c0e22534 NS |
4482 | if (low_value == error_mark_node) |
4483 | goto error_out; | |
8f17b5c5 MM |
4484 | } |
4485 | if (high_value) | |
4486 | { | |
4487 | high_value = check_case_value (high_value); | |
4488 | high_value = convert_and_check (type, high_value); | |
c0e22534 NS |
4489 | if (high_value == error_mark_node) |
4490 | goto error_out; | |
8f17b5c5 MM |
4491 | } |
4492 | ||
c0e22534 NS |
4493 | if (low_value && high_value) |
4494 | { | |
4495 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
c22cacf3 MS |
4496 | really a case range, even though it was written that way. |
4497 | Remove the HIGH_VALUE to simplify later processing. */ | |
c0e22534 NS |
4498 | if (tree_int_cst_equal (low_value, high_value)) |
4499 | high_value = NULL_TREE; | |
4500 | else if (!tree_int_cst_lt (low_value, high_value)) | |
4501 | warning (0, "empty range specified"); | |
4502 | } | |
8f17b5c5 | 4503 | |
a6c0a76c SB |
4504 | /* See if the case is in range of the type of the original testing |
4505 | expression. If both low_value and high_value are out of range, | |
4506 | don't insert the case label and return NULL_TREE. */ | |
4507 | if (low_value | |
3f75a254 JM |
4508 | && !check_case_bounds (type, orig_type, |
4509 | &low_value, high_value ? &high_value : NULL)) | |
a6c0a76c SB |
4510 | return NULL_TREE; |
4511 | ||
8f17b5c5 MM |
4512 | /* Look up the LOW_VALUE in the table of case labels we already |
4513 | have. */ | |
4514 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
4515 | /* If there was not an exact match, check for overlapping ranges. | |
4516 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
4517 | that's a `default' label and the only overlap is an exact match. */ | |
4518 | if (!node && (low_value || high_value)) | |
4519 | { | |
4520 | splay_tree_node low_bound; | |
4521 | splay_tree_node high_bound; | |
4522 | ||
4523 | /* Even though there wasn't an exact match, there might be an | |
4524 | overlap between this case range and another case range. | |
4525 | Since we've (inductively) not allowed any overlapping case | |
4526 | ranges, we simply need to find the greatest low case label | |
4527 | that is smaller that LOW_VALUE, and the smallest low case | |
4528 | label that is greater than LOW_VALUE. If there is an overlap | |
4529 | it will occur in one of these two ranges. */ | |
4530 | low_bound = splay_tree_predecessor (cases, | |
4531 | (splay_tree_key) low_value); | |
4532 | high_bound = splay_tree_successor (cases, | |
4533 | (splay_tree_key) low_value); | |
4534 | ||
4535 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
4536 | the LOW_VALUE, so there is no need to check unless the | |
4537 | LOW_BOUND is in fact itself a case range. */ | |
4538 | if (low_bound | |
4539 | && CASE_HIGH ((tree) low_bound->value) | |
4540 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
4541 | low_value) >= 0) | |
4542 | node = low_bound; | |
4543 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
4544 | range is bigger than the low end of the current range, so we | |
4545 | are only interested if the current range is a real range, and | |
4546 | not an ordinary case label. */ | |
35b1a6fa | 4547 | else if (high_bound |
8f17b5c5 MM |
4548 | && high_value |
4549 | && (tree_int_cst_compare ((tree) high_bound->key, | |
4550 | high_value) | |
4551 | <= 0)) | |
4552 | node = high_bound; | |
4553 | } | |
4554 | /* If there was an overlap, issue an error. */ | |
4555 | if (node) | |
4556 | { | |
8c161995 | 4557 | tree duplicate = CASE_LABEL ((tree) node->value); |
8f17b5c5 MM |
4558 | |
4559 | if (high_value) | |
4560 | { | |
4561 | error ("duplicate (or overlapping) case value"); | |
ddd2d57e | 4562 | error ("%Jthis is the first entry overlapping that value", duplicate); |
8f17b5c5 MM |
4563 | } |
4564 | else if (low_value) | |
4565 | { | |
4566 | error ("duplicate case value") ; | |
ddd2d57e | 4567 | error ("%Jpreviously used here", duplicate); |
8f17b5c5 MM |
4568 | } |
4569 | else | |
4570 | { | |
4571 | error ("multiple default labels in one switch"); | |
ddd2d57e | 4572 | error ("%Jthis is the first default label", duplicate); |
8f17b5c5 | 4573 | } |
6de9cd9a | 4574 | goto error_out; |
8f17b5c5 MM |
4575 | } |
4576 | ||
4577 | /* Add a CASE_LABEL to the statement-tree. */ | |
4578 | case_label = add_stmt (build_case_label (low_value, high_value, label)); | |
4579 | /* Register this case label in the splay tree. */ | |
35b1a6fa | 4580 | splay_tree_insert (cases, |
8f17b5c5 MM |
4581 | (splay_tree_key) low_value, |
4582 | (splay_tree_value) case_label); | |
4583 | ||
4584 | return case_label; | |
6de9cd9a DN |
4585 | |
4586 | error_out: | |
9e14e18f | 4587 | /* Add a label so that the back-end doesn't think that the beginning of |
6de9cd9a | 4588 | the switch is unreachable. Note that we do not add a case label, as |
41806d92 | 4589 | that just leads to duplicates and thence to failure later on. */ |
6de9cd9a DN |
4590 | if (!cases->root) |
4591 | { | |
4592 | tree t = create_artificial_label (); | |
9e14e18f | 4593 | add_stmt (build_stmt (LABEL_EXPR, t)); |
6de9cd9a DN |
4594 | } |
4595 | return error_mark_node; | |
4596 | } | |
4597 | ||
4598 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
4599 | Used to verify that case values match up with enumerator values. */ | |
4600 | ||
4601 | static void | |
4602 | match_case_to_enum_1 (tree key, tree type, tree label) | |
4603 | { | |
4604 | char buf[2 + 2*HOST_BITS_PER_WIDE_INT/4 + 1]; | |
4605 | ||
4606 | /* ??? Not working too hard to print the double-word value. | |
4607 | Should perhaps be done with %lwd in the diagnostic routines? */ | |
4608 | if (TREE_INT_CST_HIGH (key) == 0) | |
4609 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_UNSIGNED, | |
4610 | TREE_INT_CST_LOW (key)); | |
4611 | else if (!TYPE_UNSIGNED (type) | |
4612 | && TREE_INT_CST_HIGH (key) == -1 | |
4613 | && TREE_INT_CST_LOW (key) != 0) | |
4614 | snprintf (buf, sizeof (buf), "-" HOST_WIDE_INT_PRINT_UNSIGNED, | |
4615 | -TREE_INT_CST_LOW (key)); | |
4616 | else | |
4617 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_DOUBLE_HEX, | |
3d57d7ce DK |
4618 | (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (key), |
4619 | (unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (key)); | |
6de9cd9a DN |
4620 | |
4621 | if (TYPE_NAME (type) == 0) | |
683d6ff9 MLI |
4622 | warning (warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, |
4623 | "%Jcase value %qs not in enumerated type", | |
8c161995 | 4624 | CASE_LABEL (label), buf); |
6de9cd9a | 4625 | else |
683d6ff9 MLI |
4626 | warning (warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, |
4627 | "%Jcase value %qs not in enumerated type %qT", | |
8c161995 | 4628 | CASE_LABEL (label), buf, type); |
6de9cd9a DN |
4629 | } |
4630 | ||
c782c2fe RS |
4631 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
4632 | Used to verify that case values match up with enumerator values. */ | |
4633 | ||
6de9cd9a DN |
4634 | static int |
4635 | match_case_to_enum (splay_tree_node node, void *data) | |
4636 | { | |
4637 | tree label = (tree) node->value; | |
28dab132 | 4638 | tree type = (tree) data; |
6de9cd9a DN |
4639 | |
4640 | /* Skip default case. */ | |
4641 | if (!CASE_LOW (label)) | |
4642 | return 0; | |
4643 | ||
c782c2fe | 4644 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
6de9cd9a | 4645 | when we did our enum->case scan. Reset our scratch bit after. */ |
c782c2fe | 4646 | if (!CASE_LOW_SEEN (label)) |
6de9cd9a DN |
4647 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
4648 | else | |
c782c2fe | 4649 | CASE_LOW_SEEN (label) = 0; |
6de9cd9a | 4650 | |
c782c2fe RS |
4651 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
4652 | not set, that means that CASE_HIGH did not appear when we did our | |
4653 | enum->case scan. Reset our scratch bit after. */ | |
6de9cd9a DN |
4654 | if (CASE_HIGH (label)) |
4655 | { | |
c782c2fe RS |
4656 | if (!CASE_HIGH_SEEN (label)) |
4657 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
4658 | else | |
4659 | CASE_HIGH_SEEN (label) = 0; | |
6de9cd9a DN |
4660 | } |
4661 | ||
4662 | return 0; | |
4663 | } | |
4664 | ||
fbc315db ILT |
4665 | /* Handle -Wswitch*. Called from the front end after parsing the |
4666 | switch construct. */ | |
4667 | /* ??? Should probably be somewhere generic, since other languages | |
4668 | besides C and C++ would want this. At the moment, however, C/C++ | |
4669 | are the only tree-ssa languages that support enumerations at all, | |
4670 | so the point is moot. */ | |
6de9cd9a | 4671 | |
fbc315db ILT |
4672 | void |
4673 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
4674 | tree type, tree cond) | |
6de9cd9a | 4675 | { |
9f63daea | 4676 | splay_tree_node default_node; |
c782c2fe RS |
4677 | splay_tree_node node; |
4678 | tree chain; | |
683d6ff9 | 4679 | int saved_warn_switch; |
6de9cd9a DN |
4680 | |
4681 | if (!warn_switch && !warn_switch_enum && !warn_switch_default) | |
4682 | return; | |
4683 | ||
6de9cd9a | 4684 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
44c21c7f DD |
4685 | if (!default_node) |
4686 | warning (OPT_Wswitch_default, "%Hswitch missing default case", | |
4687 | &switch_location); | |
6de9cd9a | 4688 | |
c782c2fe RS |
4689 | /* From here on, we only care about about enumerated types. */ |
4690 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) | |
4691 | return; | |
4692 | ||
6de9cd9a DN |
4693 | /* If the switch expression was an enumerated type, check that |
4694 | exactly all enumeration literals are covered by the cases. | |
4695 | The check is made when -Wswitch was specified and there is no | |
4696 | default case, or when -Wswitch-enum was specified. */ | |
6de9cd9a | 4697 | |
c782c2fe RS |
4698 | if (!warn_switch_enum |
4699 | && !(warn_switch && !default_node)) | |
4700 | return; | |
4701 | ||
4702 | /* Clearing COND if it is not an integer constant simplifies | |
4703 | the tests inside the loop below. */ | |
4704 | if (TREE_CODE (cond) != INTEGER_CST) | |
4705 | cond = NULL_TREE; | |
4706 | ||
4707 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
4708 | common case of monotonically increasing enumerators, it is | |
4709 | O(N), since the nature of the splay tree will keep the next | |
4710 | element adjacent to the root at all times. */ | |
6de9cd9a | 4711 | |
c782c2fe RS |
4712 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
4713 | { | |
4714 | tree value = TREE_VALUE (chain); | |
4715 | node = splay_tree_lookup (cases, (splay_tree_key) value); | |
4716 | if (node) | |
6de9cd9a | 4717 | { |
c782c2fe RS |
4718 | /* Mark the CASE_LOW part of the case entry as seen. */ |
4719 | tree label = (tree) node->value; | |
4720 | CASE_LOW_SEEN (label) = 1; | |
4721 | continue; | |
4722 | } | |
4723 | ||
4724 | /* Even though there wasn't an exact match, there might be a | |
fa10beec | 4725 | case range which includes the enumerator's value. */ |
c782c2fe RS |
4726 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
4727 | if (node && CASE_HIGH ((tree) node->value)) | |
4728 | { | |
4729 | tree label = (tree) node->value; | |
4730 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
4731 | if (cmp >= 0) | |
6de9cd9a | 4732 | { |
c782c2fe RS |
4733 | /* If we match the upper bound exactly, mark the CASE_HIGH |
4734 | part of the case entry as seen. */ | |
4735 | if (cmp == 0) | |
4736 | CASE_HIGH_SEEN (label) = 1; | |
4737 | continue; | |
6de9cd9a DN |
4738 | } |
4739 | } | |
4740 | ||
c782c2fe RS |
4741 | /* We've now determined that this enumerated literal isn't |
4742 | handled by the case labels of the switch statement. */ | |
6de9cd9a | 4743 | |
c782c2fe RS |
4744 | /* If the switch expression is a constant, we only really care |
4745 | about whether that constant is handled by the switch. */ | |
4746 | if (cond && tree_int_cst_compare (cond, value)) | |
4747 | continue; | |
6de9cd9a | 4748 | |
683d6ff9 MLI |
4749 | /* If there is a default_node, the only relevant option is |
4750 | Wswitch-enum. Otherwise, if both are enabled then we prefer | |
4751 | to warn using -Wswitch because -Wswitch is enabled by -Wall | |
4752 | while -Wswitch-enum is explicit. */ | |
4753 | warning ((default_node || !warn_switch) | |
4754 | ? OPT_Wswitch_enum : OPT_Wswitch, | |
4755 | "%Henumeration value %qE not handled in switch", | |
c782c2fe | 4756 | &switch_location, TREE_PURPOSE (chain)); |
6de9cd9a | 4757 | } |
c782c2fe RS |
4758 | |
4759 | /* Warn if there are case expressions that don't correspond to | |
4760 | enumerators. This can occur since C and C++ don't enforce | |
4761 | type-checking of assignments to enumeration variables. | |
4762 | ||
4763 | The time complexity here is now always O(N) worst case, since | |
4764 | we should have marked both the lower bound and upper bound of | |
4765 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
4766 | above. This scan also resets those fields. */ | |
683d6ff9 MLI |
4767 | |
4768 | /* If there is a default_node, the only relevant option is | |
4769 | Wswitch-enum. Otherwise, if both are enabled then we prefer | |
4770 | to warn using -Wswitch because -Wswitch is enabled by -Wall | |
4771 | while -Wswitch-enum is explicit. */ | |
4772 | saved_warn_switch = warn_switch; | |
4773 | if (default_node) | |
4774 | warn_switch = 0; | |
c782c2fe | 4775 | splay_tree_foreach (cases, match_case_to_enum, type); |
683d6ff9 MLI |
4776 | warn_switch = saved_warn_switch; |
4777 | ||
8f17b5c5 MM |
4778 | } |
4779 | ||
6b665219 MM |
4780 | /* Finish an expression taking the address of LABEL (an |
4781 | IDENTIFIER_NODE). Returns an expression for the address. */ | |
15b732b2 | 4782 | |
35b1a6fa AJ |
4783 | tree |
4784 | finish_label_address_expr (tree label) | |
15b732b2 NB |
4785 | { |
4786 | tree result; | |
4787 | ||
4788 | if (pedantic) | |
37fa72e9 | 4789 | pedwarn ("taking the address of a label is non-standard"); |
15b732b2 | 4790 | |
6b665219 MM |
4791 | if (label == error_mark_node) |
4792 | return error_mark_node; | |
4793 | ||
15b732b2 NB |
4794 | label = lookup_label (label); |
4795 | if (label == NULL_TREE) | |
4796 | result = null_pointer_node; | |
4797 | else | |
4798 | { | |
4799 | TREE_USED (label) = 1; | |
4800 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
15b732b2 NB |
4801 | /* The current function in not necessarily uninlinable. |
4802 | Computed gotos are incompatible with inlining, but the value | |
4803 | here could be used only in a diagnostic, for example. */ | |
4804 | } | |
4805 | ||
4806 | return result; | |
4807 | } | |
4808 | ||
8f17b5c5 | 4809 | /* Hook used by expand_expr to expand language-specific tree codes. */ |
9f63daea | 4810 | /* The only things that should go here are bits needed to expand |
1ea7e6ad | 4811 | constant initializers. Everything else should be handled by the |
6de9cd9a | 4812 | gimplification routines. */ |
8f17b5c5 MM |
4813 | |
4814 | rtx | |
9f63daea | 4815 | c_expand_expr (tree exp, rtx target, enum machine_mode tmode, |
d75d71e0 | 4816 | int modifiera /* Actually enum expand_modifier. */, |
0fab64a3 | 4817 | rtx *alt_rtl) |
8f17b5c5 | 4818 | { |
d75d71e0 | 4819 | enum expand_modifier modifier = (enum expand_modifier) modifiera; |
8f17b5c5 MM |
4820 | switch (TREE_CODE (exp)) |
4821 | { | |
db3acfa5 JM |
4822 | case COMPOUND_LITERAL_EXPR: |
4823 | { | |
4824 | /* Initialize the anonymous variable declared in the compound | |
4825 | literal, then return the variable. */ | |
4826 | tree decl = COMPOUND_LITERAL_EXPR_DECL (exp); | |
4827 | emit_local_var (decl); | |
0fab64a3 | 4828 | return expand_expr_real (decl, target, tmode, modifier, alt_rtl); |
db3acfa5 JM |
4829 | } |
4830 | ||
8f17b5c5 | 4831 | default: |
366de0ce | 4832 | gcc_unreachable (); |
8f17b5c5 | 4833 | } |
8f17b5c5 MM |
4834 | } |
4835 | ||
270c60bb DB |
4836 | /* Hook used by staticp to handle language-specific tree codes. */ |
4837 | ||
4838 | tree | |
4839 | c_staticp (tree exp) | |
4840 | { | |
4841 | return (TREE_CODE (exp) == COMPOUND_LITERAL_EXPR | |
4842 | && TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (exp)) | |
4843 | ? exp : NULL); | |
4844 | } | |
19552aa5 JM |
4845 | \f |
4846 | ||
4847 | /* Given a boolean expression ARG, return a tree representing an increment | |
4848 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
4849 | invalid cases (e.g., decrement in C++). */ | |
4850 | tree | |
35b1a6fa | 4851 | boolean_increment (enum tree_code code, tree arg) |
19552aa5 JM |
4852 | { |
4853 | tree val; | |
b5119fa1 | 4854 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
37fa72e9 | 4855 | |
19552aa5 JM |
4856 | arg = stabilize_reference (arg); |
4857 | switch (code) | |
4858 | { | |
4859 | case PREINCREMENT_EXPR: | |
53fb4de3 | 4860 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 JM |
4861 | break; |
4862 | case POSTINCREMENT_EXPR: | |
53fb4de3 | 4863 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 | 4864 | arg = save_expr (arg); |
53fb4de3 RS |
4865 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
4866 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
4867 | break; |
4868 | case PREDECREMENT_EXPR: | |
53fb4de3 RS |
4869 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
4870 | invert_truthvalue (arg)); | |
19552aa5 JM |
4871 | break; |
4872 | case POSTDECREMENT_EXPR: | |
53fb4de3 RS |
4873 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
4874 | invert_truthvalue (arg)); | |
19552aa5 | 4875 | arg = save_expr (arg); |
53fb4de3 RS |
4876 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
4877 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
4878 | break; |
4879 | default: | |
366de0ce | 4880 | gcc_unreachable (); |
19552aa5 JM |
4881 | } |
4882 | TREE_SIDE_EFFECTS (val) = 1; | |
4883 | return val; | |
4884 | } | |
03dc0325 | 4885 | \f |
cb60f38d NB |
4886 | /* Built-in macros for stddef.h, that require macros defined in this |
4887 | file. */ | |
460bd0e3 | 4888 | void |
35b1a6fa | 4889 | c_stddef_cpp_builtins(void) |
3df89291 | 4890 | { |
5279d739 ZW |
4891 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
4892 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
4893 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
4894 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
85291069 JM |
4895 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
4896 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
676997cf RH |
4897 | } |
4898 | ||
6431177a | 4899 | static void |
35b1a6fa | 4900 | c_init_attributes (void) |
6431177a JM |
4901 | { |
4902 | /* Fill in the built_in_attributes array. */ | |
4a90aeeb | 4903 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
6431177a | 4904 | built_in_attributes[(int) ENUM] = NULL_TREE; |
4a90aeeb | 4905 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
7d60be94 | 4906 | built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE); |
6431177a JM |
4907 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
4908 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
4909 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
4910 | built_in_attributes[(int) ENUM] \ | |
4911 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
4912 | built_in_attributes[(int) VALUE], \ | |
4913 | built_in_attributes[(int) CHAIN]); | |
6431177a JM |
4914 | #include "builtin-attrs.def" |
4915 | #undef DEF_ATTR_NULL_TREE | |
4916 | #undef DEF_ATTR_INT | |
4917 | #undef DEF_ATTR_IDENT | |
4918 | #undef DEF_ATTR_TREE_LIST | |
03dc0325 | 4919 | } |
26f943fd | 4920 | |
349ae713 NB |
4921 | /* Attribute handlers common to C front ends. */ |
4922 | ||
4923 | /* Handle a "packed" attribute; arguments as in | |
4924 | struct attribute_spec.handler. */ | |
4925 | ||
4926 | static tree | |
e18476eb | 4927 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
a742c759 | 4928 | int flags, bool *no_add_attrs) |
349ae713 | 4929 | { |
c6e4cc53 | 4930 | if (TYPE_P (*node)) |
349ae713 NB |
4931 | { |
4932 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 4933 | *node = build_variant_type_copy (*node); |
c6e4cc53 | 4934 | TYPE_PACKED (*node) = 1; |
349ae713 NB |
4935 | } |
4936 | else if (TREE_CODE (*node) == FIELD_DECL) | |
646c0835 NS |
4937 | { |
4938 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT) | |
4939 | warning (OPT_Wattributes, | |
4940 | "%qE attribute ignored for field of type %qT", | |
4941 | name, TREE_TYPE (*node)); | |
4942 | else | |
4943 | DECL_PACKED (*node) = 1; | |
4944 | } | |
349ae713 | 4945 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
c6e4cc53 NS |
4946 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
4947 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
4948 | that changes what the typedef is typing. */ | |
349ae713 NB |
4949 | else |
4950 | { | |
5c498b10 | 4951 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
4952 | *no_add_attrs = true; |
4953 | } | |
4954 | ||
4955 | return NULL_TREE; | |
4956 | } | |
4957 | ||
4958 | /* Handle a "nocommon" attribute; arguments as in | |
4959 | struct attribute_spec.handler. */ | |
4960 | ||
4961 | static tree | |
35b1a6fa | 4962 | handle_nocommon_attribute (tree *node, tree name, |
e18476eb BI |
4963 | tree ARG_UNUSED (args), |
4964 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
4965 | { |
4966 | if (TREE_CODE (*node) == VAR_DECL) | |
4967 | DECL_COMMON (*node) = 0; | |
4968 | else | |
4969 | { | |
5c498b10 | 4970 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
4971 | *no_add_attrs = true; |
4972 | } | |
4973 | ||
4974 | return NULL_TREE; | |
4975 | } | |
4976 | ||
4977 | /* Handle a "common" attribute; arguments as in | |
4978 | struct attribute_spec.handler. */ | |
4979 | ||
4980 | static tree | |
e18476eb BI |
4981 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
4982 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
4983 | { |
4984 | if (TREE_CODE (*node) == VAR_DECL) | |
4985 | DECL_COMMON (*node) = 1; | |
4986 | else | |
4987 | { | |
5c498b10 | 4988 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
4989 | *no_add_attrs = true; |
4990 | } | |
4991 | ||
4992 | return NULL_TREE; | |
4993 | } | |
4994 | ||
4995 | /* Handle a "noreturn" attribute; arguments as in | |
4996 | struct attribute_spec.handler. */ | |
4997 | ||
4998 | static tree | |
e18476eb BI |
4999 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5000 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5001 | { |
5002 | tree type = TREE_TYPE (*node); | |
5003 | ||
5004 | /* See FIXME comment in c_common_attribute_table. */ | |
5005 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5006 | TREE_THIS_VOLATILE (*node) = 1; | |
5007 | else if (TREE_CODE (type) == POINTER_TYPE | |
5008 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
5009 | TREE_TYPE (*node) | |
5010 | = build_pointer_type | |
5011 | (build_type_variant (TREE_TYPE (type), | |
c29726e2 | 5012 | TYPE_READONLY (TREE_TYPE (type)), 1)); |
349ae713 NB |
5013 | else |
5014 | { | |
5c498b10 | 5015 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5016 | *no_add_attrs = true; |
5017 | } | |
5018 | ||
5019 | return NULL_TREE; | |
5020 | } | |
5021 | ||
52bf96d2 JH |
5022 | /* Handle a "hot" and attribute; arguments as in |
5023 | struct attribute_spec.handler. */ | |
5024 | ||
5025 | static tree | |
5026 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
5027 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5028 | { | |
5029 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5030 | { | |
5031 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
5032 | { | |
5033 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5034 | name, "cold"); | |
5035 | *no_add_attrs = true; | |
5036 | } | |
5037 | /* Do nothing else, just set the attribute. We'll get at | |
5038 | it later with lookup_attribute. */ | |
5039 | } | |
5040 | else | |
5041 | { | |
5042 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5043 | *no_add_attrs = true; | |
5044 | } | |
5045 | ||
5046 | return NULL_TREE; | |
5047 | } | |
5048 | /* Handle a "cold" and attribute; arguments as in | |
5049 | struct attribute_spec.handler. */ | |
5050 | ||
5051 | static tree | |
5052 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
5053 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5054 | { | |
5055 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5056 | { | |
5057 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
5058 | { | |
5059 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5060 | name, "hot"); | |
5061 | *no_add_attrs = true; | |
5062 | } | |
5063 | /* Do nothing else, just set the attribute. We'll get at | |
5064 | it later with lookup_attribute. */ | |
5065 | } | |
5066 | else | |
5067 | { | |
5068 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5069 | *no_add_attrs = true; | |
5070 | } | |
5071 | ||
5072 | return NULL_TREE; | |
5073 | } | |
5074 | ||
349ae713 NB |
5075 | /* Handle a "noinline" attribute; arguments as in |
5076 | struct attribute_spec.handler. */ | |
5077 | ||
5078 | static tree | |
35b1a6fa | 5079 | handle_noinline_attribute (tree *node, tree name, |
e18476eb BI |
5080 | tree ARG_UNUSED (args), |
5081 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5082 | { |
5083 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5084 | DECL_UNINLINABLE (*node) = 1; | |
5085 | else | |
5086 | { | |
5c498b10 | 5087 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5088 | *no_add_attrs = true; |
5089 | } | |
5090 | ||
5091 | return NULL_TREE; | |
5092 | } | |
5093 | ||
5094 | /* Handle a "always_inline" attribute; arguments as in | |
5095 | struct attribute_spec.handler. */ | |
5096 | ||
5097 | static tree | |
35b1a6fa | 5098 | handle_always_inline_attribute (tree *node, tree name, |
e18476eb BI |
5099 | tree ARG_UNUSED (args), |
5100 | int ARG_UNUSED (flags), | |
a742c759 | 5101 | bool *no_add_attrs) |
349ae713 NB |
5102 | { |
5103 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5104 | { | |
c536a6a7 RG |
5105 | /* Set the attribute and mark it for disregarding inline |
5106 | limits. */ | |
5107 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
349ae713 NB |
5108 | } |
5109 | else | |
5110 | { | |
5c498b10 | 5111 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 | 5112 | *no_add_attrs = true; |
4eb7fd83 JJ |
5113 | } |
5114 | ||
5115 | return NULL_TREE; | |
5116 | } | |
5117 | ||
5118 | /* Handle a "gnu_inline" attribute; arguments as in | |
5119 | struct attribute_spec.handler. */ | |
5120 | ||
5121 | static tree | |
5122 | handle_gnu_inline_attribute (tree *node, tree name, | |
5123 | tree ARG_UNUSED (args), | |
5124 | int ARG_UNUSED (flags), | |
5125 | bool *no_add_attrs) | |
5126 | { | |
5127 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5128 | { | |
5129 | /* Do nothing else, just set the attribute. We'll get at | |
5130 | it later with lookup_attribute. */ | |
5131 | } | |
5132 | else | |
5133 | { | |
5134 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5135 | *no_add_attrs = true; | |
349ae713 NB |
5136 | } |
5137 | ||
5138 | return NULL_TREE; | |
5139 | } | |
5140 | ||
d752cfdb JJ |
5141 | /* Handle an "artificial" attribute; arguments as in |
5142 | struct attribute_spec.handler. */ | |
5143 | ||
5144 | static tree | |
5145 | handle_artificial_attribute (tree *node, tree name, | |
5146 | tree ARG_UNUSED (args), | |
5147 | int ARG_UNUSED (flags), | |
5148 | bool *no_add_attrs) | |
5149 | { | |
5150 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5151 | { | |
5152 | /* Do nothing else, just set the attribute. We'll get at | |
5153 | it later with lookup_attribute. */ | |
5154 | } | |
5155 | else | |
5156 | { | |
5157 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5158 | *no_add_attrs = true; | |
5159 | } | |
5160 | ||
5161 | return NULL_TREE; | |
5162 | } | |
5163 | ||
0691d1d4 RG |
5164 | /* Handle a "flatten" attribute; arguments as in |
5165 | struct attribute_spec.handler. */ | |
5166 | ||
5167 | static tree | |
5168 | handle_flatten_attribute (tree *node, tree name, | |
c22cacf3 MS |
5169 | tree args ATTRIBUTE_UNUSED, |
5170 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0691d1d4 RG |
5171 | { |
5172 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5173 | /* Do nothing else, just set the attribute. We'll get at | |
5174 | it later with lookup_attribute. */ | |
5175 | ; | |
5176 | else | |
5177 | { | |
5178 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5179 | *no_add_attrs = true; | |
5180 | } | |
5181 | ||
5182 | return NULL_TREE; | |
5183 | } | |
5184 | ||
d2af6a68 JJ |
5185 | /* Handle a "warning" or "error" attribute; arguments as in |
5186 | struct attribute_spec.handler. */ | |
5187 | ||
5188 | static tree | |
5189 | handle_error_attribute (tree *node, tree name, tree args, | |
5190 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5191 | { | |
5192 | if (TREE_CODE (*node) == FUNCTION_DECL | |
5193 | || TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
5194 | /* Do nothing else, just set the attribute. We'll get at | |
5195 | it later with lookup_attribute. */ | |
5196 | ; | |
5197 | else | |
5198 | { | |
5199 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5200 | *no_add_attrs = true; | |
5201 | } | |
5202 | ||
5203 | return NULL_TREE; | |
5204 | } | |
0691d1d4 | 5205 | |
349ae713 NB |
5206 | /* Handle a "used" attribute; arguments as in |
5207 | struct attribute_spec.handler. */ | |
5208 | ||
5209 | static tree | |
e18476eb BI |
5210 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
5211 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 5212 | { |
d7ddbe24 RH |
5213 | tree node = *pnode; |
5214 | ||
5215 | if (TREE_CODE (node) == FUNCTION_DECL | |
5216 | || (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node))) | |
4d7d0451 | 5217 | { |
4d7d0451 | 5218 | TREE_USED (node) = 1; |
8e3e233b | 5219 | DECL_PRESERVE_P (node) = 1; |
4d7d0451 | 5220 | } |
349ae713 NB |
5221 | else |
5222 | { | |
5c498b10 | 5223 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5224 | *no_add_attrs = true; |
5225 | } | |
5226 | ||
5227 | return NULL_TREE; | |
5228 | } | |
5229 | ||
5230 | /* Handle a "unused" attribute; arguments as in | |
5231 | struct attribute_spec.handler. */ | |
5232 | ||
5233 | static tree | |
e18476eb BI |
5234 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5235 | int flags, bool *no_add_attrs) | |
349ae713 NB |
5236 | { |
5237 | if (DECL_P (*node)) | |
5238 | { | |
5239 | tree decl = *node; | |
5240 | ||
5241 | if (TREE_CODE (decl) == PARM_DECL | |
5242 | || TREE_CODE (decl) == VAR_DECL | |
5243 | || TREE_CODE (decl) == FUNCTION_DECL | |
5244 | || TREE_CODE (decl) == LABEL_DECL | |
5245 | || TREE_CODE (decl) == TYPE_DECL) | |
5246 | TREE_USED (decl) = 1; | |
5247 | else | |
5248 | { | |
5c498b10 | 5249 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5250 | *no_add_attrs = true; |
5251 | } | |
5252 | } | |
5253 | else | |
5254 | { | |
5255 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 5256 | *node = build_variant_type_copy (*node); |
349ae713 NB |
5257 | TREE_USED (*node) = 1; |
5258 | } | |
5259 | ||
5260 | return NULL_TREE; | |
5261 | } | |
5262 | ||
ce91e74c JH |
5263 | /* Handle a "externally_visible" attribute; arguments as in |
5264 | struct attribute_spec.handler. */ | |
5265 | ||
5266 | static tree | |
5267 | handle_externally_visible_attribute (tree *pnode, tree name, | |
5268 | tree ARG_UNUSED (args), | |
5269 | int ARG_UNUSED (flags), | |
5270 | bool *no_add_attrs) | |
5271 | { | |
5272 | tree node = *pnode; | |
5273 | ||
343d4b27 | 5274 | if (TREE_CODE (node) == FUNCTION_DECL || TREE_CODE (node) == VAR_DECL) |
ce91e74c | 5275 | { |
343d4b27 JJ |
5276 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
5277 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
5278 | { | |
5279 | warning (OPT_Wattributes, | |
5280 | "%qE attribute have effect only on public objects", name); | |
5281 | *no_add_attrs = true; | |
5282 | } | |
ce91e74c | 5283 | } |
ce91e74c JH |
5284 | else |
5285 | { | |
5286 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5287 | *no_add_attrs = true; | |
5288 | } | |
5289 | ||
5290 | return NULL_TREE; | |
5291 | } | |
5292 | ||
349ae713 NB |
5293 | /* Handle a "const" attribute; arguments as in |
5294 | struct attribute_spec.handler. */ | |
5295 | ||
5296 | static tree | |
e18476eb BI |
5297 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5298 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5299 | { |
5300 | tree type = TREE_TYPE (*node); | |
5301 | ||
5302 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
5303 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5304 | TREE_READONLY (*node) = 1; | |
5305 | else if (TREE_CODE (type) == POINTER_TYPE | |
5306 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
5307 | TREE_TYPE (*node) | |
5308 | = build_pointer_type | |
5309 | (build_type_variant (TREE_TYPE (type), 1, | |
5310 | TREE_THIS_VOLATILE (TREE_TYPE (type)))); | |
5311 | else | |
5312 | { | |
5c498b10 | 5313 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5314 | *no_add_attrs = true; |
5315 | } | |
5316 | ||
5317 | return NULL_TREE; | |
5318 | } | |
5319 | ||
5320 | /* Handle a "transparent_union" attribute; arguments as in | |
5321 | struct attribute_spec.handler. */ | |
5322 | ||
5323 | static tree | |
35b1a6fa | 5324 | handle_transparent_union_attribute (tree *node, tree name, |
e18476eb | 5325 | tree ARG_UNUSED (args), int flags, |
a742c759 | 5326 | bool *no_add_attrs) |
349ae713 | 5327 | { |
4009f2e7 | 5328 | tree type; |
52dd234b RH |
5329 | |
5330 | *no_add_attrs = true; | |
349ae713 | 5331 | |
4009f2e7 JM |
5332 | if (TREE_CODE (*node) == TYPE_DECL) |
5333 | node = &TREE_TYPE (*node); | |
5334 | type = *node; | |
349ae713 | 5335 | |
52dd234b | 5336 | if (TREE_CODE (type) == UNION_TYPE) |
349ae713 | 5337 | { |
52dd234b RH |
5338 | /* When IN_PLACE is set, leave the check for FIELDS and MODE to |
5339 | the code in finish_struct. */ | |
349ae713 | 5340 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
52dd234b RH |
5341 | { |
5342 | if (TYPE_FIELDS (type) == NULL_TREE | |
5343 | || TYPE_MODE (type) != DECL_MODE (TYPE_FIELDS (type))) | |
5344 | goto ignored; | |
5345 | ||
5346 | /* A type variant isn't good enough, since we don't a cast | |
5347 | to such a type removed as a no-op. */ | |
5348 | *node = type = build_duplicate_type (type); | |
5349 | } | |
5350 | ||
5351 | TYPE_TRANSPARENT_UNION (type) = 1; | |
5352 | return NULL_TREE; | |
349ae713 NB |
5353 | } |
5354 | ||
52dd234b RH |
5355 | ignored: |
5356 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
5357 | return NULL_TREE; |
5358 | } | |
5359 | ||
fc8600f9 MM |
5360 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
5361 | get the requested priority for a constructor or destructor, | |
5362 | possibly issuing diagnostics for invalid or reserved | |
5363 | priorities. */ | |
5364 | ||
5365 | static priority_type | |
5366 | get_priority (tree args, bool is_destructor) | |
5367 | { | |
5368 | HOST_WIDE_INT pri; | |
b2f4bed8 | 5369 | tree arg; |
fc8600f9 MM |
5370 | |
5371 | if (!args) | |
5372 | return DEFAULT_INIT_PRIORITY; | |
b2f4bed8 | 5373 | |
f6fc5c86 MM |
5374 | if (!SUPPORTS_INIT_PRIORITY) |
5375 | { | |
5376 | if (is_destructor) | |
5377 | error ("destructor priorities are not supported"); | |
5378 | else | |
5379 | error ("constructor priorities are not supported"); | |
5380 | return DEFAULT_INIT_PRIORITY; | |
5381 | } | |
5382 | ||
b2f4bed8 MM |
5383 | arg = TREE_VALUE (args); |
5384 | if (!host_integerp (arg, /*pos=*/0) | |
5385 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) | |
fc8600f9 MM |
5386 | goto invalid; |
5387 | ||
5388 | pri = tree_low_cst (TREE_VALUE (args), /*pos=*/0); | |
5389 | if (pri < 0 || pri > MAX_INIT_PRIORITY) | |
5390 | goto invalid; | |
5391 | ||
5392 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
5393 | { | |
5394 | if (is_destructor) | |
5395 | warning (0, | |
5396 | "destructor priorities from 0 to %d are reserved " | |
5397 | "for the implementation", | |
5398 | MAX_RESERVED_INIT_PRIORITY); | |
5399 | else | |
5400 | warning (0, | |
5401 | "constructor priorities from 0 to %d are reserved " | |
5402 | "for the implementation", | |
5403 | MAX_RESERVED_INIT_PRIORITY); | |
5404 | } | |
5405 | return pri; | |
5406 | ||
5407 | invalid: | |
5408 | if (is_destructor) | |
5409 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
5410 | MAX_INIT_PRIORITY); | |
5411 | else | |
5412 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
5413 | MAX_INIT_PRIORITY); | |
5414 | return DEFAULT_INIT_PRIORITY; | |
5415 | } | |
5416 | ||
349ae713 NB |
5417 | /* Handle a "constructor" attribute; arguments as in |
5418 | struct attribute_spec.handler. */ | |
5419 | ||
5420 | static tree | |
fc8600f9 | 5421 | handle_constructor_attribute (tree *node, tree name, tree args, |
e18476eb | 5422 | int ARG_UNUSED (flags), |
a742c759 | 5423 | bool *no_add_attrs) |
349ae713 NB |
5424 | { |
5425 | tree decl = *node; | |
5426 | tree type = TREE_TYPE (decl); | |
5427 | ||
5428 | if (TREE_CODE (decl) == FUNCTION_DECL | |
5429 | && TREE_CODE (type) == FUNCTION_TYPE | |
5430 | && decl_function_context (decl) == 0) | |
5431 | { | |
fc8600f9 | 5432 | priority_type priority; |
349ae713 | 5433 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
fc8600f9 MM |
5434 | priority = get_priority (args, /*is_destructor=*/false); |
5435 | SET_DECL_INIT_PRIORITY (decl, priority); | |
349ae713 NB |
5436 | TREE_USED (decl) = 1; |
5437 | } | |
5438 | else | |
5439 | { | |
5c498b10 | 5440 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5441 | *no_add_attrs = true; |
5442 | } | |
5443 | ||
5444 | return NULL_TREE; | |
5445 | } | |
5446 | ||
5447 | /* Handle a "destructor" attribute; arguments as in | |
5448 | struct attribute_spec.handler. */ | |
5449 | ||
5450 | static tree | |
fc8600f9 | 5451 | handle_destructor_attribute (tree *node, tree name, tree args, |
e18476eb | 5452 | int ARG_UNUSED (flags), |
a742c759 | 5453 | bool *no_add_attrs) |
349ae713 NB |
5454 | { |
5455 | tree decl = *node; | |
5456 | tree type = TREE_TYPE (decl); | |
5457 | ||
5458 | if (TREE_CODE (decl) == FUNCTION_DECL | |
5459 | && TREE_CODE (type) == FUNCTION_TYPE | |
5460 | && decl_function_context (decl) == 0) | |
5461 | { | |
fc8600f9 | 5462 | priority_type priority; |
349ae713 | 5463 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
fc8600f9 MM |
5464 | priority = get_priority (args, /*is_destructor=*/true); |
5465 | SET_DECL_FINI_PRIORITY (decl, priority); | |
349ae713 NB |
5466 | TREE_USED (decl) = 1; |
5467 | } | |
5468 | else | |
5469 | { | |
5c498b10 | 5470 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5471 | *no_add_attrs = true; |
5472 | } | |
5473 | ||
5474 | return NULL_TREE; | |
5475 | } | |
5476 | ||
5477 | /* Handle a "mode" attribute; arguments as in | |
5478 | struct attribute_spec.handler. */ | |
5479 | ||
5480 | static tree | |
e18476eb BI |
5481 | handle_mode_attribute (tree *node, tree name, tree args, |
5482 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5483 | { |
5484 | tree type = *node; | |
5485 | ||
5486 | *no_add_attrs = true; | |
5487 | ||
5488 | if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE) | |
5c498b10 | 5489 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5490 | else |
5491 | { | |
5492 | int j; | |
5493 | const char *p = IDENTIFIER_POINTER (TREE_VALUE (args)); | |
5494 | int len = strlen (p); | |
5495 | enum machine_mode mode = VOIDmode; | |
5496 | tree typefm; | |
6dd53648 | 5497 | bool valid_mode; |
349ae713 NB |
5498 | |
5499 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
5500 | && p[len - 1] == '_' && p[len - 2] == '_') | |
5501 | { | |
28dab132 | 5502 | char *newp = (char *) alloca (len - 1); |
349ae713 NB |
5503 | |
5504 | strcpy (newp, &p[2]); | |
5505 | newp[len - 4] = '\0'; | |
5506 | p = newp; | |
5507 | } | |
5508 | ||
5509 | /* Change this type to have a type with the specified mode. | |
5510 | First check for the special modes. */ | |
3f75a254 | 5511 | if (!strcmp (p, "byte")) |
349ae713 NB |
5512 | mode = byte_mode; |
5513 | else if (!strcmp (p, "word")) | |
5514 | mode = word_mode; | |
3f75a254 | 5515 | else if (!strcmp (p, "pointer")) |
349ae713 | 5516 | mode = ptr_mode; |
c7ff6e7a AK |
5517 | else if (!strcmp (p, "libgcc_cmp_return")) |
5518 | mode = targetm.libgcc_cmp_return_mode (); | |
5519 | else if (!strcmp (p, "libgcc_shift_count")) | |
5520 | mode = targetm.libgcc_shift_count_mode (); | |
7b0518e3 UW |
5521 | else if (!strcmp (p, "unwind_word")) |
5522 | mode = targetm.unwind_word_mode (); | |
349ae713 NB |
5523 | else |
5524 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
5525 | if (!strcmp (p, GET_MODE_NAME (j))) | |
61f03aba RH |
5526 | { |
5527 | mode = (enum machine_mode) j; | |
5528 | break; | |
5529 | } | |
349ae713 NB |
5530 | |
5531 | if (mode == VOIDmode) | |
4a5eab38 | 5532 | { |
9e637a26 | 5533 | error ("unknown machine mode %qs", p); |
4a5eab38 PB |
5534 | return NULL_TREE; |
5535 | } | |
5536 | ||
6dd53648 RH |
5537 | valid_mode = false; |
5538 | switch (GET_MODE_CLASS (mode)) | |
4a5eab38 | 5539 | { |
6dd53648 RH |
5540 | case MODE_INT: |
5541 | case MODE_PARTIAL_INT: | |
5542 | case MODE_FLOAT: | |
9a8ce21f | 5543 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
5544 | case MODE_FRACT: |
5545 | case MODE_UFRACT: | |
5546 | case MODE_ACCUM: | |
5547 | case MODE_UACCUM: | |
6dd53648 RH |
5548 | valid_mode = targetm.scalar_mode_supported_p (mode); |
5549 | break; | |
5550 | ||
5551 | case MODE_COMPLEX_INT: | |
5552 | case MODE_COMPLEX_FLOAT: | |
5553 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
5554 | break; | |
5555 | ||
5556 | case MODE_VECTOR_INT: | |
5557 | case MODE_VECTOR_FLOAT: | |
ab22c1fa CF |
5558 | case MODE_VECTOR_FRACT: |
5559 | case MODE_VECTOR_UFRACT: | |
5560 | case MODE_VECTOR_ACCUM: | |
5561 | case MODE_VECTOR_UACCUM: | |
5c498b10 DD |
5562 | warning (OPT_Wattributes, "specifying vector types with " |
5563 | "__attribute__ ((mode)) is deprecated"); | |
5564 | warning (OPT_Wattributes, | |
5565 | "use __attribute__ ((vector_size)) instead"); | |
6dd53648 RH |
5566 | valid_mode = vector_mode_valid_p (mode); |
5567 | break; | |
4a5eab38 | 5568 | |
6dd53648 RH |
5569 | default: |
5570 | break; | |
5571 | } | |
5572 | if (!valid_mode) | |
5573 | { | |
9e637a26 | 5574 | error ("unable to emulate %qs", p); |
6dd53648 RH |
5575 | return NULL_TREE; |
5576 | } | |
4a5eab38 | 5577 | |
6dd53648 | 5578 | if (POINTER_TYPE_P (type)) |
cb2a532e | 5579 | { |
6dd53648 RH |
5580 | tree (*fn)(tree, enum machine_mode, bool); |
5581 | ||
5582 | if (!targetm.valid_pointer_mode (mode)) | |
cb2a532e | 5583 | { |
9e637a26 | 5584 | error ("invalid pointer mode %qs", p); |
cb2a532e AH |
5585 | return NULL_TREE; |
5586 | } | |
5587 | ||
c22cacf3 | 5588 | if (TREE_CODE (type) == POINTER_TYPE) |
6dd53648 | 5589 | fn = build_pointer_type_for_mode; |
4977bab6 | 5590 | else |
6dd53648 RH |
5591 | fn = build_reference_type_for_mode; |
5592 | typefm = fn (TREE_TYPE (type), mode, false); | |
cb2a532e | 5593 | } |
6dd53648 | 5594 | else |
ab22c1fa CF |
5595 | { |
5596 | /* For fixed-point modes, we need to test if the signness of type | |
5597 | and the machine mode are consistent. */ | |
5598 | if (ALL_FIXED_POINT_MODE_P (mode) | |
5599 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
5600 | { | |
5601 | error ("signness of type and machine mode %qs don't match", p); | |
5602 | return NULL_TREE; | |
5603 | } | |
5604 | /* For fixed-point modes, we need to pass saturating info. */ | |
5605 | typefm = lang_hooks.types.type_for_mode (mode, | |
5606 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
5607 | : TYPE_UNSIGNED (type)); | |
5608 | } | |
ec8465a5 | 5609 | |
6dd53648 RH |
5610 | if (typefm == NULL_TREE) |
5611 | { | |
61f03aba | 5612 | error ("no data type for mode %qs", p); |
6dd53648 RH |
5613 | return NULL_TREE; |
5614 | } | |
ec8465a5 RK |
5615 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
5616 | { | |
5617 | /* For enumeral types, copy the precision from the integer | |
5618 | type returned above. If not an INTEGER_TYPE, we can't use | |
5619 | this mode for this type. */ | |
5620 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
5621 | { | |
61f03aba | 5622 | error ("cannot use mode %qs for enumeral types", p); |
ec8465a5 RK |
5623 | return NULL_TREE; |
5624 | } | |
5625 | ||
99db1ef0 RH |
5626 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
5627 | { | |
5628 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
5629 | typefm = type; | |
5630 | } | |
5631 | else | |
5632 | { | |
5633 | /* We cannot build a type variant, as there's code that assumes | |
5634 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
5635 | debug generators. Instead, create a subrange type. This | |
5636 | results in all of the enumeral values being emitted only once | |
5637 | in the original, and the subtype gets them by reference. */ | |
5638 | if (TYPE_UNSIGNED (type)) | |
5639 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
5640 | else | |
5641 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
5642 | TREE_TYPE (typefm) = type; | |
5643 | } | |
ec8465a5 | 5644 | } |
a2d36602 RH |
5645 | else if (VECTOR_MODE_P (mode) |
5646 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
5647 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
61f03aba RH |
5648 | { |
5649 | error ("mode %qs applied to inappropriate type", p); | |
5650 | return NULL_TREE; | |
5651 | } | |
5652 | ||
6dd53648 | 5653 | *node = typefm; |
349ae713 NB |
5654 | } |
5655 | ||
5656 | return NULL_TREE; | |
5657 | } | |
5658 | ||
5659 | /* Handle a "section" attribute; arguments as in | |
5660 | struct attribute_spec.handler. */ | |
5661 | ||
5662 | static tree | |
e18476eb BI |
5663 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
5664 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5665 | { |
5666 | tree decl = *node; | |
5667 | ||
5668 | if (targetm.have_named_sections) | |
5669 | { | |
9fb32434 CT |
5670 | user_defined_section_attribute = true; |
5671 | ||
349ae713 NB |
5672 | if ((TREE_CODE (decl) == FUNCTION_DECL |
5673 | || TREE_CODE (decl) == VAR_DECL) | |
5674 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
5675 | { | |
5676 | if (TREE_CODE (decl) == VAR_DECL | |
5677 | && current_function_decl != NULL_TREE | |
3f75a254 | 5678 | && !TREE_STATIC (decl)) |
349ae713 | 5679 | { |
ddd2d57e | 5680 | error ("%Jsection attribute cannot be specified for " |
6de9cd9a | 5681 | "local variables", decl); |
349ae713 NB |
5682 | *no_add_attrs = true; |
5683 | } | |
5684 | ||
5685 | /* The decl may have already been given a section attribute | |
5686 | from a previous declaration. Ensure they match. */ | |
5687 | else if (DECL_SECTION_NAME (decl) != NULL_TREE | |
5688 | && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)), | |
5689 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) | |
5690 | { | |
dee15844 JM |
5691 | error ("section of %q+D conflicts with previous declaration", |
5692 | *node); | |
349ae713 NB |
5693 | *no_add_attrs = true; |
5694 | } | |
feb60f03 NS |
5695 | else if (TREE_CODE (decl) == VAR_DECL |
5696 | && !targetm.have_tls && targetm.emutls.tmpl_section | |
5697 | && DECL_THREAD_LOCAL_P (decl)) | |
5698 | { | |
5699 | error ("section of %q+D cannot be overridden", *node); | |
5700 | *no_add_attrs = true; | |
5701 | } | |
349ae713 NB |
5702 | else |
5703 | DECL_SECTION_NAME (decl) = TREE_VALUE (args); | |
5704 | } | |
5705 | else | |
5706 | { | |
dee15844 | 5707 | error ("section attribute not allowed for %q+D", *node); |
349ae713 NB |
5708 | *no_add_attrs = true; |
5709 | } | |
5710 | } | |
5711 | else | |
5712 | { | |
ddd2d57e | 5713 | error ("%Jsection attributes are not supported for this target", *node); |
349ae713 NB |
5714 | *no_add_attrs = true; |
5715 | } | |
5716 | ||
5717 | return NULL_TREE; | |
5718 | } | |
5719 | ||
5720 | /* Handle a "aligned" attribute; arguments as in | |
5721 | struct attribute_spec.handler. */ | |
5722 | ||
5723 | static tree | |
e18476eb | 5724 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
a742c759 | 5725 | int flags, bool *no_add_attrs) |
349ae713 NB |
5726 | { |
5727 | tree decl = NULL_TREE; | |
5728 | tree *type = NULL; | |
5729 | int is_type = 0; | |
5730 | tree align_expr = (args ? TREE_VALUE (args) | |
5731 | : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
5732 | int i; | |
5733 | ||
5734 | if (DECL_P (*node)) | |
5735 | { | |
5736 | decl = *node; | |
5737 | type = &TREE_TYPE (decl); | |
5738 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
5739 | } | |
5740 | else if (TYPE_P (*node)) | |
5741 | type = node, is_type = 1; | |
5742 | ||
349ae713 NB |
5743 | if (TREE_CODE (align_expr) != INTEGER_CST) |
5744 | { | |
5745 | error ("requested alignment is not a constant"); | |
5746 | *no_add_attrs = true; | |
5747 | } | |
5748 | else if ((i = tree_log2 (align_expr)) == -1) | |
5749 | { | |
5750 | error ("requested alignment is not a power of 2"); | |
5751 | *no_add_attrs = true; | |
5752 | } | |
5753 | else if (i > HOST_BITS_PER_INT - 2) | |
5754 | { | |
5755 | error ("requested alignment is too large"); | |
5756 | *no_add_attrs = true; | |
5757 | } | |
5758 | else if (is_type) | |
5759 | { | |
5760 | /* If we have a TYPE_DECL, then copy the type, so that we | |
5761 | don't accidentally modify a builtin type. See pushdecl. */ | |
5762 | if (decl && TREE_TYPE (decl) != error_mark_node | |
5763 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
5764 | { | |
5765 | tree tt = TREE_TYPE (decl); | |
8dd16ecc | 5766 | *type = build_variant_type_copy (*type); |
349ae713 NB |
5767 | DECL_ORIGINAL_TYPE (decl) = tt; |
5768 | TYPE_NAME (*type) = decl; | |
5769 | TREE_USED (*type) = TREE_USED (decl); | |
5770 | TREE_TYPE (decl) = *type; | |
5771 | } | |
5772 | else if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 5773 | *type = build_variant_type_copy (*type); |
349ae713 NB |
5774 | |
5775 | TYPE_ALIGN (*type) = (1 << i) * BITS_PER_UNIT; | |
5776 | TYPE_USER_ALIGN (*type) = 1; | |
5777 | } | |
837edd5f | 5778 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
349ae713 NB |
5779 | && TREE_CODE (decl) != FIELD_DECL) |
5780 | { | |
dee15844 | 5781 | error ("alignment may not be specified for %q+D", decl); |
349ae713 NB |
5782 | *no_add_attrs = true; |
5783 | } | |
837edd5f GK |
5784 | else if (TREE_CODE (decl) == FUNCTION_DECL |
5785 | && DECL_ALIGN (decl) > (1 << i) * BITS_PER_UNIT) | |
5786 | { | |
5787 | if (DECL_USER_ALIGN (decl)) | |
5788 | error ("alignment for %q+D was previously specified as %d " | |
5789 | "and may not be decreased", decl, | |
5790 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
5791 | else | |
5792 | error ("alignment for %q+D must be at least %d", decl, | |
5793 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
5794 | *no_add_attrs = true; | |
5795 | } | |
349ae713 NB |
5796 | else |
5797 | { | |
5798 | DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT; | |
5799 | DECL_USER_ALIGN (decl) = 1; | |
5800 | } | |
5801 | ||
5802 | return NULL_TREE; | |
5803 | } | |
5804 | ||
5805 | /* Handle a "weak" attribute; arguments as in | |
5806 | struct attribute_spec.handler. */ | |
5807 | ||
5808 | static tree | |
55af93a8 | 5809 | handle_weak_attribute (tree *node, tree name, |
e18476eb BI |
5810 | tree ARG_UNUSED (args), |
5811 | int ARG_UNUSED (flags), | |
5812 | bool * ARG_UNUSED (no_add_attrs)) | |
349ae713 | 5813 | { |
55af93a8 | 5814 | if (TREE_CODE (*node) == FUNCTION_DECL |
6b4e94bc RG |
5815 | && DECL_DECLARED_INLINE_P (*node)) |
5816 | { | |
5817 | error ("inline function %q+D cannot be declared weak", *node); | |
5818 | *no_add_attrs = true; | |
5819 | } | |
5820 | else if (TREE_CODE (*node) == FUNCTION_DECL | |
5821 | || TREE_CODE (*node) == VAR_DECL) | |
55af93a8 DS |
5822 | declare_weak (*node); |
5823 | else | |
5824 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
5825 | |
5826 | return NULL_TREE; | |
5827 | } | |
5828 | ||
5829 | /* Handle an "alias" attribute; arguments as in | |
5830 | struct attribute_spec.handler. */ | |
5831 | ||
5832 | static tree | |
35b1a6fa | 5833 | handle_alias_attribute (tree *node, tree name, tree args, |
e18476eb | 5834 | int ARG_UNUSED (flags), bool *no_add_attrs) |
349ae713 NB |
5835 | { |
5836 | tree decl = *node; | |
5837 | ||
5838 | if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
a9b0b825 GK |
5839 | || (TREE_CODE (decl) != FUNCTION_DECL |
5840 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) | |
5841 | /* A static variable declaration is always a tentative definition, | |
5842 | but the alias is a non-tentative definition which overrides. */ | |
5843 | || (TREE_CODE (decl) != FUNCTION_DECL | |
5844 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) | |
349ae713 | 5845 | { |
dee15844 | 5846 | error ("%q+D defined both normally and as an alias", decl); |
349ae713 NB |
5847 | *no_add_attrs = true; |
5848 | } | |
f6a76b9f RH |
5849 | |
5850 | /* Note that the very first time we process a nested declaration, | |
5851 | decl_function_context will not be set. Indeed, *would* never | |
5852 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
5853 | we do below. After such frobbery, pushdecl would set the context. | |
5854 | In any case, this is never what we want. */ | |
5855 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
349ae713 NB |
5856 | { |
5857 | tree id; | |
5858 | ||
5859 | id = TREE_VALUE (args); | |
5860 | if (TREE_CODE (id) != STRING_CST) | |
5861 | { | |
40b97a2e | 5862 | error ("alias argument not a string"); |
349ae713 NB |
5863 | *no_add_attrs = true; |
5864 | return NULL_TREE; | |
5865 | } | |
5866 | id = get_identifier (TREE_STRING_POINTER (id)); | |
5867 | /* This counts as a use of the object pointed to. */ | |
5868 | TREE_USED (id) = 1; | |
5869 | ||
5870 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
5871 | DECL_INITIAL (decl) = error_mark_node; | |
5872 | else | |
6de9cd9a | 5873 | { |
a0203ca7 AO |
5874 | if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl))) |
5875 | DECL_EXTERNAL (decl) = 1; | |
5876 | else | |
5877 | DECL_EXTERNAL (decl) = 0; | |
6de9cd9a DN |
5878 | TREE_STATIC (decl) = 1; |
5879 | } | |
349ae713 NB |
5880 | } |
5881 | else | |
5882 | { | |
5c498b10 | 5883 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5884 | *no_add_attrs = true; |
5885 | } | |
5886 | ||
5887 | return NULL_TREE; | |
5888 | } | |
5889 | ||
a0203ca7 AO |
5890 | /* Handle a "weakref" attribute; arguments as in struct |
5891 | attribute_spec.handler. */ | |
5892 | ||
5893 | static tree | |
5894 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
5895 | int flags, bool *no_add_attrs) | |
5896 | { | |
5897 | tree attr = NULL_TREE; | |
5898 | ||
e1cf56b1 AO |
5899 | /* We must ignore the attribute when it is associated with |
5900 | local-scoped decls, since attribute alias is ignored and many | |
5901 | such symbols do not even have a DECL_WEAK field. */ | |
5902 | if (decl_function_context (*node) || current_function_decl) | |
5903 | { | |
5904 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5905 | *no_add_attrs = true; | |
5906 | return NULL_TREE; | |
5907 | } | |
5908 | ||
a0203ca7 AO |
5909 | /* The idea here is that `weakref("name")' mutates into `weakref, |
5910 | alias("name")', and weakref without arguments, in turn, | |
5911 | implicitly adds weak. */ | |
5912 | ||
5913 | if (args) | |
5914 | { | |
5915 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
5916 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
5917 | ||
5918 | *no_add_attrs = true; | |
a9b0b825 GK |
5919 | |
5920 | decl_attributes (node, attr, flags); | |
a0203ca7 AO |
5921 | } |
5922 | else | |
5923 | { | |
5924 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
5925 | error ("%Jweakref attribute must appear before alias attribute", | |
5926 | *node); | |
5927 | ||
a9b0b825 GK |
5928 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
5929 | and that isn't supported; and because it wants to add it to | |
5930 | the list of weak decls, which isn't helpful. */ | |
5931 | DECL_WEAK (*node) = 1; | |
a0203ca7 AO |
5932 | } |
5933 | ||
a0203ca7 AO |
5934 | return NULL_TREE; |
5935 | } | |
5936 | ||
349ae713 NB |
5937 | /* Handle an "visibility" attribute; arguments as in |
5938 | struct attribute_spec.handler. */ | |
5939 | ||
5940 | static tree | |
35b1a6fa | 5941 | handle_visibility_attribute (tree *node, tree name, tree args, |
e18476eb | 5942 | int ARG_UNUSED (flags), |
b9e75696 | 5943 | bool *ARG_UNUSED (no_add_attrs)) |
349ae713 NB |
5944 | { |
5945 | tree decl = *node; | |
968b41a1 | 5946 | tree id = TREE_VALUE (args); |
b9e75696 | 5947 | enum symbol_visibility vis; |
349ae713 | 5948 | |
d7afec4b ND |
5949 | if (TYPE_P (*node)) |
5950 | { | |
b9e75696 JM |
5951 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
5952 | /* OK */; | |
5953 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
5954 | { | |
5955 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
5956 | name); | |
5957 | return NULL_TREE; | |
5958 | } | |
5959 | else if (TYPE_FIELDS (*node)) | |
5960 | { | |
5961 | error ("%qE attribute ignored because %qT is already defined", | |
5962 | name, *node); | |
5963 | return NULL_TREE; | |
5964 | } | |
d7afec4b | 5965 | } |
3f75a254 | 5966 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
349ae713 | 5967 | { |
5c498b10 | 5968 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
968b41a1 | 5969 | return NULL_TREE; |
349ae713 | 5970 | } |
349ae713 | 5971 | |
968b41a1 MA |
5972 | if (TREE_CODE (id) != STRING_CST) |
5973 | { | |
40b97a2e | 5974 | error ("visibility argument not a string"); |
968b41a1 | 5975 | return NULL_TREE; |
349ae713 | 5976 | } |
9f63daea | 5977 | |
d7afec4b ND |
5978 | /* If this is a type, set the visibility on the type decl. */ |
5979 | if (TYPE_P (decl)) | |
5980 | { | |
5981 | decl = TYPE_NAME (decl); | |
3f75a254 | 5982 | if (!decl) |
c22cacf3 | 5983 | return NULL_TREE; |
e8233ac2 AP |
5984 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
5985 | { | |
5c498b10 | 5986 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e8233ac2 AP |
5987 | name); |
5988 | return NULL_TREE; | |
5989 | } | |
d7afec4b | 5990 | } |
349ae713 | 5991 | |
968b41a1 | 5992 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
b9e75696 | 5993 | vis = VISIBILITY_DEFAULT; |
968b41a1 | 5994 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
b9e75696 | 5995 | vis = VISIBILITY_INTERNAL; |
968b41a1 | 5996 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
b9e75696 | 5997 | vis = VISIBILITY_HIDDEN; |
968b41a1 | 5998 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
b9e75696 | 5999 | vis = VISIBILITY_PROTECTED; |
968b41a1 | 6000 | else |
b9e75696 JM |
6001 | { |
6002 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
6003 | vis = VISIBILITY_DEFAULT; | |
6004 | } | |
6005 | ||
6006 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
3a687f8b MM |
6007 | && vis != DECL_VISIBILITY (decl)) |
6008 | { | |
6009 | tree attributes = (TYPE_P (*node) | |
6010 | ? TYPE_ATTRIBUTES (*node) | |
6011 | : DECL_ATTRIBUTES (decl)); | |
6012 | if (lookup_attribute ("visibility", attributes)) | |
6013 | error ("%qD redeclared with different visibility", decl); | |
6014 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6015 | && lookup_attribute ("dllimport", attributes)) | |
6016 | error ("%qD was declared %qs which implies default visibility", | |
6017 | decl, "dllimport"); | |
6018 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6019 | && lookup_attribute ("dllexport", attributes)) | |
6020 | error ("%qD was declared %qs which implies default visibility", | |
6021 | decl, "dllexport"); | |
6022 | } | |
b9e75696 JM |
6023 | |
6024 | DECL_VISIBILITY (decl) = vis; | |
d7afec4b ND |
6025 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
6026 | ||
b9e75696 JM |
6027 | /* Go ahead and attach the attribute to the node as well. This is needed |
6028 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
6029 | visibility was not specified, or because it was explicitly overridden | |
6030 | from the containing scope. */ | |
968b41a1 | 6031 | |
349ae713 NB |
6032 | return NULL_TREE; |
6033 | } | |
6034 | ||
b2ca3702 MM |
6035 | /* Determine the ELF symbol visibility for DECL, which is either a |
6036 | variable or a function. It is an error to use this function if a | |
6037 | definition of DECL is not available in this translation unit. | |
6038 | Returns true if the final visibility has been determined by this | |
6039 | function; false if the caller is free to make additional | |
6040 | modifications. */ | |
6041 | ||
6042 | bool | |
6043 | c_determine_visibility (tree decl) | |
6044 | { | |
4094f4d2 NS |
6045 | gcc_assert (TREE_CODE (decl) == VAR_DECL |
6046 | || TREE_CODE (decl) == FUNCTION_DECL); | |
b2ca3702 MM |
6047 | |
6048 | /* If the user explicitly specified the visibility with an | |
6049 | attribute, honor that. DECL_VISIBILITY will have been set during | |
6050 | the processing of the attribute. We check for an explicit | |
6051 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
6052 | to distinguish the use of an attribute from the use of a "#pragma | |
6053 | GCC visibility push(...)"; in the latter case we still want other | |
6054 | considerations to be able to overrule the #pragma. */ | |
3a687f8b MM |
6055 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) |
6056 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6057 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
6058 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
b2ca3702 MM |
6059 | return true; |
6060 | ||
b9e75696 JM |
6061 | /* Set default visibility to whatever the user supplied with |
6062 | visibility_specified depending on #pragma GCC visibility. */ | |
6063 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
6064 | { | |
6065 | DECL_VISIBILITY (decl) = default_visibility; | |
6066 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
6067 | } | |
b2ca3702 MM |
6068 | return false; |
6069 | } | |
6070 | ||
dce81a1a JJ |
6071 | /* Handle an "tls_model" attribute; arguments as in |
6072 | struct attribute_spec.handler. */ | |
6073 | ||
6074 | static tree | |
35b1a6fa | 6075 | handle_tls_model_attribute (tree *node, tree name, tree args, |
e18476eb | 6076 | int ARG_UNUSED (flags), bool *no_add_attrs) |
dce81a1a | 6077 | { |
c2f7fa15 | 6078 | tree id; |
dce81a1a | 6079 | tree decl = *node; |
c2f7fa15 | 6080 | enum tls_model kind; |
dce81a1a | 6081 | |
c2f7fa15 SB |
6082 | *no_add_attrs = true; |
6083 | ||
6084 | if (!DECL_THREAD_LOCAL_P (decl)) | |
dce81a1a | 6085 | { |
5c498b10 | 6086 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
c2f7fa15 | 6087 | return NULL_TREE; |
dce81a1a | 6088 | } |
dce81a1a | 6089 | |
c2f7fa15 SB |
6090 | kind = DECL_TLS_MODEL (decl); |
6091 | id = TREE_VALUE (args); | |
6092 | if (TREE_CODE (id) != STRING_CST) | |
6093 | { | |
6094 | error ("tls_model argument not a string"); | |
6095 | return NULL_TREE; | |
dce81a1a JJ |
6096 | } |
6097 | ||
c2f7fa15 SB |
6098 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
6099 | kind = TLS_MODEL_LOCAL_EXEC; | |
6100 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
6101 | kind = TLS_MODEL_INITIAL_EXEC; | |
6102 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
6103 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
6104 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
6105 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
6106 | else | |
6107 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
6108 | ||
6109 | DECL_TLS_MODEL (decl) = kind; | |
dce81a1a JJ |
6110 | return NULL_TREE; |
6111 | } | |
6112 | ||
349ae713 NB |
6113 | /* Handle a "no_instrument_function" attribute; arguments as in |
6114 | struct attribute_spec.handler. */ | |
6115 | ||
6116 | static tree | |
35b1a6fa | 6117 | handle_no_instrument_function_attribute (tree *node, tree name, |
e18476eb BI |
6118 | tree ARG_UNUSED (args), |
6119 | int ARG_UNUSED (flags), | |
a742c759 | 6120 | bool *no_add_attrs) |
349ae713 NB |
6121 | { |
6122 | tree decl = *node; | |
6123 | ||
6124 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
6125 | { | |
bda67431 | 6126 | error ("%J%qE attribute applies only to functions", decl, name); |
349ae713 NB |
6127 | *no_add_attrs = true; |
6128 | } | |
6129 | else if (DECL_INITIAL (decl)) | |
6130 | { | |
bda67431 | 6131 | error ("%Jcan%'t set %qE attribute after definition", decl, name); |
349ae713 NB |
6132 | *no_add_attrs = true; |
6133 | } | |
6134 | else | |
6135 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
6136 | ||
6137 | return NULL_TREE; | |
6138 | } | |
6139 | ||
6140 | /* Handle a "malloc" attribute; arguments as in | |
6141 | struct attribute_spec.handler. */ | |
6142 | ||
6143 | static tree | |
e18476eb BI |
6144 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6145 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 6146 | { |
3425638a JM |
6147 | if (TREE_CODE (*node) == FUNCTION_DECL |
6148 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
349ae713 | 6149 | DECL_IS_MALLOC (*node) = 1; |
349ae713 NB |
6150 | else |
6151 | { | |
5c498b10 | 6152 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6153 | *no_add_attrs = true; |
6154 | } | |
6155 | ||
6156 | return NULL_TREE; | |
6157 | } | |
6158 | ||
51bc54a6 DM |
6159 | /* Handle a "alloc_size" attribute; arguments as in |
6160 | struct attribute_spec.handler. */ | |
6161 | ||
6162 | static tree | |
6163 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
6164 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6165 | { | |
f3f75f69 | 6166 | unsigned arg_count = type_num_arguments (*node); |
51bc54a6 DM |
6167 | for (; args; args = TREE_CHAIN (args)) |
6168 | { | |
6169 | tree position = TREE_VALUE (args); | |
6170 | ||
6171 | if (TREE_CODE (position) != INTEGER_CST | |
6172 | || TREE_INT_CST_HIGH (position) | |
6173 | || TREE_INT_CST_LOW (position) < 1 | |
6174 | || TREE_INT_CST_LOW (position) > arg_count ) | |
6175 | { | |
6176 | warning (OPT_Wattributes, | |
6177 | "alloc_size parameter outside range"); | |
6178 | *no_add_attrs = true; | |
6179 | return NULL_TREE; | |
6180 | } | |
6181 | } | |
6182 | return NULL_TREE; | |
6183 | } | |
6184 | ||
6e9a3221 AN |
6185 | /* Handle a "returns_twice" attribute; arguments as in |
6186 | struct attribute_spec.handler. */ | |
6187 | ||
6188 | static tree | |
6189 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
6190 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6191 | { | |
6192 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6193 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
6194 | else | |
6195 | { | |
5c498b10 | 6196 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
6e9a3221 AN |
6197 | *no_add_attrs = true; |
6198 | } | |
6199 | ||
6200 | return NULL_TREE; | |
6201 | } | |
6202 | ||
349ae713 NB |
6203 | /* Handle a "no_limit_stack" attribute; arguments as in |
6204 | struct attribute_spec.handler. */ | |
6205 | ||
6206 | static tree | |
35b1a6fa | 6207 | handle_no_limit_stack_attribute (tree *node, tree name, |
e18476eb BI |
6208 | tree ARG_UNUSED (args), |
6209 | int ARG_UNUSED (flags), | |
a742c759 | 6210 | bool *no_add_attrs) |
349ae713 NB |
6211 | { |
6212 | tree decl = *node; | |
6213 | ||
6214 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
6215 | { | |
bda67431 | 6216 | error ("%J%qE attribute applies only to functions", decl, name); |
349ae713 NB |
6217 | *no_add_attrs = true; |
6218 | } | |
6219 | else if (DECL_INITIAL (decl)) | |
6220 | { | |
bda67431 | 6221 | error ("%Jcan%'t set %qE attribute after definition", decl, name); |
349ae713 NB |
6222 | *no_add_attrs = true; |
6223 | } | |
6224 | else | |
6225 | DECL_NO_LIMIT_STACK (decl) = 1; | |
6226 | ||
6227 | return NULL_TREE; | |
6228 | } | |
6229 | ||
6230 | /* Handle a "pure" attribute; arguments as in | |
6231 | struct attribute_spec.handler. */ | |
6232 | ||
6233 | static tree | |
e18476eb BI |
6234 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6235 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
6236 | { |
6237 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
becfd6e5 | 6238 | DECL_PURE_P (*node) = 1; |
349ae713 NB |
6239 | /* ??? TODO: Support types. */ |
6240 | else | |
6241 | { | |
5c498b10 | 6242 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6243 | *no_add_attrs = true; |
6244 | } | |
6245 | ||
6246 | return NULL_TREE; | |
6247 | } | |
6248 | ||
dcd6de6d ZD |
6249 | /* Handle a "no vops" attribute; arguments as in |
6250 | struct attribute_spec.handler. */ | |
6251 | ||
6252 | static tree | |
6253 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
6254 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
6255 | bool *ARG_UNUSED (no_add_attrs)) | |
6256 | { | |
6257 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
6258 | DECL_IS_NOVOPS (*node) = 1; | |
6259 | return NULL_TREE; | |
6260 | } | |
6261 | ||
349ae713 NB |
6262 | /* Handle a "deprecated" attribute; arguments as in |
6263 | struct attribute_spec.handler. */ | |
35b1a6fa | 6264 | |
349ae713 | 6265 | static tree |
35b1a6fa | 6266 | handle_deprecated_attribute (tree *node, tree name, |
e18476eb | 6267 | tree ARG_UNUSED (args), int flags, |
a742c759 | 6268 | bool *no_add_attrs) |
349ae713 NB |
6269 | { |
6270 | tree type = NULL_TREE; | |
6271 | int warn = 0; | |
c51a1ba9 | 6272 | tree what = NULL_TREE; |
35b1a6fa | 6273 | |
349ae713 NB |
6274 | if (DECL_P (*node)) |
6275 | { | |
6276 | tree decl = *node; | |
6277 | type = TREE_TYPE (decl); | |
35b1a6fa | 6278 | |
349ae713 NB |
6279 | if (TREE_CODE (decl) == TYPE_DECL |
6280 | || TREE_CODE (decl) == PARM_DECL | |
6281 | || TREE_CODE (decl) == VAR_DECL | |
6282 | || TREE_CODE (decl) == FUNCTION_DECL | |
6283 | || TREE_CODE (decl) == FIELD_DECL) | |
6284 | TREE_DEPRECATED (decl) = 1; | |
6285 | else | |
6286 | warn = 1; | |
6287 | } | |
6288 | else if (TYPE_P (*node)) | |
6289 | { | |
6290 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 6291 | *node = build_variant_type_copy (*node); |
349ae713 NB |
6292 | TREE_DEPRECATED (*node) = 1; |
6293 | type = *node; | |
6294 | } | |
6295 | else | |
6296 | warn = 1; | |
35b1a6fa | 6297 | |
349ae713 NB |
6298 | if (warn) |
6299 | { | |
6300 | *no_add_attrs = true; | |
6301 | if (type && TYPE_NAME (type)) | |
6302 | { | |
6303 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
c51a1ba9 | 6304 | what = TYPE_NAME (*node); |
349ae713 NB |
6305 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
6306 | && DECL_NAME (TYPE_NAME (type))) | |
c51a1ba9 | 6307 | what = DECL_NAME (TYPE_NAME (type)); |
349ae713 NB |
6308 | } |
6309 | if (what) | |
5c498b10 | 6310 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
349ae713 | 6311 | else |
5c498b10 | 6312 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6313 | } |
6314 | ||
6315 | return NULL_TREE; | |
6316 | } | |
6317 | ||
349ae713 NB |
6318 | /* Handle a "vector_size" attribute; arguments as in |
6319 | struct attribute_spec.handler. */ | |
6320 | ||
6321 | static tree | |
35b1a6fa | 6322 | handle_vector_size_attribute (tree *node, tree name, tree args, |
e18476eb | 6323 | int ARG_UNUSED (flags), |
a742c759 | 6324 | bool *no_add_attrs) |
349ae713 NB |
6325 | { |
6326 | unsigned HOST_WIDE_INT vecsize, nunits; | |
26277d41 | 6327 | enum machine_mode orig_mode; |
4a5eab38 | 6328 | tree type = *node, new_type, size; |
349ae713 NB |
6329 | |
6330 | *no_add_attrs = true; | |
6331 | ||
4a5eab38 | 6332 | size = TREE_VALUE (args); |
4a5eab38 | 6333 | |
3f75a254 | 6334 | if (!host_integerp (size, 1)) |
349ae713 | 6335 | { |
5c498b10 | 6336 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6337 | return NULL_TREE; |
6338 | } | |
6339 | ||
6340 | /* Get the vector size (in bytes). */ | |
4a5eab38 | 6341 | vecsize = tree_low_cst (size, 1); |
349ae713 NB |
6342 | |
6343 | /* We need to provide for vector pointers, vector arrays, and | |
6344 | functions returning vectors. For example: | |
6345 | ||
6346 | __attribute__((vector_size(16))) short *foo; | |
6347 | ||
6348 | In this case, the mode is SI, but the type being modified is | |
6349 | HI, so we need to look further. */ | |
6350 | ||
6351 | while (POINTER_TYPE_P (type) | |
6352 | || TREE_CODE (type) == FUNCTION_TYPE | |
43dc123f | 6353 | || TREE_CODE (type) == METHOD_TYPE |
270e749d JJ |
6354 | || TREE_CODE (type) == ARRAY_TYPE |
6355 | || TREE_CODE (type) == OFFSET_TYPE) | |
349ae713 NB |
6356 | type = TREE_TYPE (type); |
6357 | ||
6358 | /* Get the mode of the type being modified. */ | |
6359 | orig_mode = TYPE_MODE (type); | |
6360 | ||
270e749d JJ |
6361 | if ((!INTEGRAL_TYPE_P (type) |
6362 | && !SCALAR_FLOAT_TYPE_P (type) | |
6363 | && !FIXED_POINT_TYPE_P (type)) | |
3d8bf70f | 6364 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
ab22c1fa CF |
6365 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
6366 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
3f75a254 | 6367 | || !host_integerp (TYPE_SIZE_UNIT (type), 1)) |
349ae713 | 6368 | { |
c51a1ba9 | 6369 | error ("invalid vector type for attribute %qE", name); |
349ae713 NB |
6370 | return NULL_TREE; |
6371 | } | |
6372 | ||
ee8960e5 JJ |
6373 | if (vecsize % tree_low_cst (TYPE_SIZE_UNIT (type), 1)) |
6374 | { | |
6375 | error ("vector size not an integral multiple of component size"); | |
6376 | return NULL; | |
6377 | } | |
6378 | ||
6379 | if (vecsize == 0) | |
6380 | { | |
6381 | error ("zero vector size"); | |
6382 | return NULL; | |
6383 | } | |
6384 | ||
349ae713 NB |
6385 | /* Calculate how many units fit in the vector. */ |
6386 | nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
26277d41 | 6387 | if (nunits & (nunits - 1)) |
349ae713 | 6388 | { |
26277d41 | 6389 | error ("number of components of the vector not a power of two"); |
349ae713 NB |
6390 | return NULL_TREE; |
6391 | } | |
6392 | ||
26277d41 | 6393 | new_type = build_vector_type (type, nunits); |
349ae713 NB |
6394 | |
6395 | /* Build back pointers if needed. */ | |
5dc11954 | 6396 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
349ae713 NB |
6397 | |
6398 | return NULL_TREE; | |
6399 | } | |
6400 | ||
b34c7881 JT |
6401 | /* Handle the "nonnull" attribute. */ |
6402 | static tree | |
e18476eb BI |
6403 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
6404 | tree args, int ARG_UNUSED (flags), | |
a742c759 | 6405 | bool *no_add_attrs) |
b34c7881 JT |
6406 | { |
6407 | tree type = *node; | |
6408 | unsigned HOST_WIDE_INT attr_arg_num; | |
6409 | ||
6410 | /* If no arguments are specified, all pointer arguments should be | |
95bd1dd7 | 6411 | non-null. Verify a full prototype is given so that the arguments |
b34c7881 | 6412 | will have the correct types when we actually check them later. */ |
3f75a254 | 6413 | if (!args) |
b34c7881 | 6414 | { |
3f75a254 | 6415 | if (!TYPE_ARG_TYPES (type)) |
b34c7881 JT |
6416 | { |
6417 | error ("nonnull attribute without arguments on a non-prototype"); | |
6de9cd9a | 6418 | *no_add_attrs = true; |
b34c7881 JT |
6419 | } |
6420 | return NULL_TREE; | |
6421 | } | |
6422 | ||
6423 | /* Argument list specified. Verify that each argument number references | |
6424 | a pointer argument. */ | |
6425 | for (attr_arg_num = 1; args; args = TREE_CHAIN (args)) | |
6426 | { | |
6427 | tree argument; | |
6de9cd9a | 6428 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
b34c7881 | 6429 | |
3f75a254 | 6430 | if (!get_nonnull_operand (TREE_VALUE (args), &arg_num)) |
b34c7881 | 6431 | { |
40b97a2e | 6432 | error ("nonnull argument has invalid operand number (argument %lu)", |
b34c7881 JT |
6433 | (unsigned long) attr_arg_num); |
6434 | *no_add_attrs = true; | |
6435 | return NULL_TREE; | |
6436 | } | |
6437 | ||
6438 | argument = TYPE_ARG_TYPES (type); | |
6439 | if (argument) | |
6440 | { | |
6441 | for (ck_num = 1; ; ck_num++) | |
6442 | { | |
3f75a254 | 6443 | if (!argument || ck_num == arg_num) |
b34c7881 JT |
6444 | break; |
6445 | argument = TREE_CHAIN (argument); | |
6446 | } | |
6447 | ||
3f75a254 | 6448 | if (!argument |
b34c7881 JT |
6449 | || TREE_CODE (TREE_VALUE (argument)) == VOID_TYPE) |
6450 | { | |
40b97a2e | 6451 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
b34c7881 JT |
6452 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
6453 | *no_add_attrs = true; | |
6454 | return NULL_TREE; | |
6455 | } | |
6456 | ||
6de9cd9a | 6457 | if (TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE) |
b34c7881 | 6458 | { |
40b97a2e | 6459 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
b34c7881 JT |
6460 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
6461 | *no_add_attrs = true; | |
6462 | return NULL_TREE; | |
6463 | } | |
6464 | } | |
6465 | } | |
6466 | ||
6467 | return NULL_TREE; | |
6468 | } | |
6469 | ||
6470 | /* Check the argument list of a function call for null in argument slots | |
94a0dd7b SL |
6471 | that are marked as requiring a non-null pointer argument. The NARGS |
6472 | arguments are passed in the array ARGARRAY. | |
6473 | */ | |
b34c7881 JT |
6474 | |
6475 | static void | |
94a0dd7b | 6476 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
b34c7881 | 6477 | { |
94a0dd7b SL |
6478 | tree a, args; |
6479 | int i; | |
b34c7881 JT |
6480 | |
6481 | for (a = attrs; a; a = TREE_CHAIN (a)) | |
6482 | { | |
6483 | if (is_attribute_p ("nonnull", TREE_PURPOSE (a))) | |
6484 | { | |
6de9cd9a | 6485 | args = TREE_VALUE (a); |
b34c7881 | 6486 | |
6de9cd9a DN |
6487 | /* Walk the argument list. If we encounter an argument number we |
6488 | should check for non-null, do it. If the attribute has no args, | |
6489 | then every pointer argument is checked (in which case the check | |
b34c7881 | 6490 | for pointer type is done in check_nonnull_arg). */ |
94a0dd7b | 6491 | for (i = 0; i < nargs; i++) |
6de9cd9a | 6492 | { |
94a0dd7b | 6493 | if (!args || nonnull_check_p (args, i + 1)) |
dfd0a3de | 6494 | check_function_arguments_recurse (check_nonnull_arg, NULL, |
94a0dd7b SL |
6495 | argarray[i], |
6496 | i + 1); | |
6de9cd9a | 6497 | } |
b34c7881 JT |
6498 | } |
6499 | } | |
6500 | } | |
6501 | ||
254986c7 | 6502 | /* Check that the Nth argument of a function call (counting backwards |
94a0dd7b SL |
6503 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
6504 | array ARGARRAY. */ | |
3d091dac KG |
6505 | |
6506 | static void | |
94a0dd7b | 6507 | check_function_sentinel (tree attrs, int nargs, tree *argarray, tree typelist) |
3d091dac KG |
6508 | { |
6509 | tree attr = lookup_attribute ("sentinel", attrs); | |
6510 | ||
6511 | if (attr) | |
6512 | { | |
94a0dd7b SL |
6513 | int len = 0; |
6514 | int pos = 0; | |
6515 | tree sentinel; | |
c22cacf3 | 6516 | |
94a0dd7b SL |
6517 | /* Skip over the named arguments. */ |
6518 | while (typelist && len < nargs) | |
c22cacf3 | 6519 | { |
94a0dd7b SL |
6520 | typelist = TREE_CHAIN (typelist); |
6521 | len++; | |
6522 | } | |
254986c7 | 6523 | |
94a0dd7b SL |
6524 | if (TREE_VALUE (attr)) |
6525 | { | |
6526 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
6527 | pos = TREE_INT_CST_LOW (p); | |
6528 | } | |
254986c7 | 6529 | |
94a0dd7b SL |
6530 | /* The sentinel must be one of the varargs, i.e. |
6531 | in position >= the number of fixed arguments. */ | |
6532 | if ((nargs - 1 - pos) < len) | |
6533 | { | |
6534 | warning (OPT_Wformat, | |
6535 | "not enough variable arguments to fit a sentinel"); | |
6536 | return; | |
3d091dac | 6537 | } |
94a0dd7b SL |
6538 | |
6539 | /* Validate the sentinel. */ | |
6540 | sentinel = argarray[nargs - 1 - pos]; | |
6541 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
6542 | || !integer_zerop (sentinel)) | |
6543 | /* Although __null (in C++) is only an integer we allow it | |
6544 | nevertheless, as we are guaranteed that it's exactly | |
6545 | as wide as a pointer, and we don't want to force | |
6546 | users to cast the NULL they have written there. | |
6547 | We warn with -Wstrict-null-sentinel, though. */ | |
6548 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
6549 | warning (OPT_Wformat, "missing sentinel in function call"); | |
3d091dac KG |
6550 | } |
6551 | } | |
6552 | ||
b34c7881 JT |
6553 | /* Helper for check_function_nonnull; given a list of operands which |
6554 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
6555 | checked. */ | |
6556 | ||
6557 | static bool | |
35b1a6fa | 6558 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
b34c7881 | 6559 | { |
6de9cd9a | 6560 | unsigned HOST_WIDE_INT arg_num = 0; |
b34c7881 JT |
6561 | |
6562 | for (; args; args = TREE_CHAIN (args)) | |
6563 | { | |
366de0ce NS |
6564 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
6565 | ||
6566 | gcc_assert (found); | |
b34c7881 JT |
6567 | |
6568 | if (arg_num == param_num) | |
6569 | return true; | |
6570 | } | |
6571 | return false; | |
6572 | } | |
6573 | ||
6574 | /* Check that the function argument PARAM (which is operand number | |
6575 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
6576 | via check_function_arguments_recurse. */ | |
6577 | ||
6578 | static void | |
e18476eb | 6579 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
35b1a6fa | 6580 | unsigned HOST_WIDE_INT param_num) |
b34c7881 JT |
6581 | { |
6582 | /* Just skip checking the argument if it's not a pointer. This can | |
6583 | happen if the "nonnull" attribute was given without an operand | |
6584 | list (which means to check every pointer argument). */ | |
6585 | ||
6586 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
6587 | return; | |
6588 | ||
6589 | if (integer_zerop (param)) | |
30480ec4 DD |
6590 | warning (OPT_Wnonnull, "null argument where non-null required " |
6591 | "(argument %lu)", (unsigned long) param_num); | |
b34c7881 JT |
6592 | } |
6593 | ||
6594 | /* Helper for nonnull attribute handling; fetch the operand number | |
6595 | from the attribute argument list. */ | |
6596 | ||
6597 | static bool | |
35b1a6fa | 6598 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
b34c7881 | 6599 | { |
f6d1c3a6 | 6600 | /* Verify the arg number is a constant. */ |
b34c7881 JT |
6601 | if (TREE_CODE (arg_num_expr) != INTEGER_CST |
6602 | || TREE_INT_CST_HIGH (arg_num_expr) != 0) | |
6603 | return false; | |
6604 | ||
6605 | *valp = TREE_INT_CST_LOW (arg_num_expr); | |
6606 | return true; | |
6607 | } | |
39f2f3c8 RS |
6608 | |
6609 | /* Handle a "nothrow" attribute; arguments as in | |
6610 | struct attribute_spec.handler. */ | |
6611 | ||
6612 | static tree | |
e18476eb BI |
6613 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6614 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
39f2f3c8 RS |
6615 | { |
6616 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6617 | TREE_NOTHROW (*node) = 1; | |
6618 | /* ??? TODO: Support types. */ | |
6619 | else | |
6620 | { | |
5c498b10 | 6621 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
39f2f3c8 RS |
6622 | *no_add_attrs = true; |
6623 | } | |
6624 | ||
6625 | return NULL_TREE; | |
6626 | } | |
0bfa5f65 RH |
6627 | |
6628 | /* Handle a "cleanup" attribute; arguments as in | |
6629 | struct attribute_spec.handler. */ | |
6630 | ||
6631 | static tree | |
35b1a6fa | 6632 | handle_cleanup_attribute (tree *node, tree name, tree args, |
e18476eb | 6633 | int ARG_UNUSED (flags), bool *no_add_attrs) |
0bfa5f65 RH |
6634 | { |
6635 | tree decl = *node; | |
6636 | tree cleanup_id, cleanup_decl; | |
6637 | ||
6638 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
6639 | for global destructors in C++. This requires infrastructure that | |
6640 | we don't have generically at the moment. It's also not a feature | |
6641 | we'd be missing too much, since we do have attribute constructor. */ | |
6642 | if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)) | |
6643 | { | |
5c498b10 | 6644 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
0bfa5f65 RH |
6645 | *no_add_attrs = true; |
6646 | return NULL_TREE; | |
6647 | } | |
6648 | ||
6649 | /* Verify that the argument is a function in scope. */ | |
6650 | /* ??? We could support pointers to functions here as well, if | |
6651 | that was considered desirable. */ | |
6652 | cleanup_id = TREE_VALUE (args); | |
6653 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
6654 | { | |
40b97a2e | 6655 | error ("cleanup argument not an identifier"); |
0bfa5f65 RH |
6656 | *no_add_attrs = true; |
6657 | return NULL_TREE; | |
6658 | } | |
10e6657a | 6659 | cleanup_decl = lookup_name (cleanup_id); |
0bfa5f65 RH |
6660 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
6661 | { | |
40b97a2e | 6662 | error ("cleanup argument not a function"); |
0bfa5f65 RH |
6663 | *no_add_attrs = true; |
6664 | return NULL_TREE; | |
6665 | } | |
6666 | ||
35b1a6fa | 6667 | /* That the function has proper type is checked with the |
0bfa5f65 RH |
6668 | eventual call to build_function_call. */ |
6669 | ||
6670 | return NULL_TREE; | |
6671 | } | |
72954a4f JM |
6672 | |
6673 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
6674 | ||
6675 | static tree | |
6676 | handle_warn_unused_result_attribute (tree *node, tree name, | |
e18476eb BI |
6677 | tree ARG_UNUSED (args), |
6678 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
72954a4f JM |
6679 | { |
6680 | /* Ignore the attribute for functions not returning any value. */ | |
6681 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
6682 | { | |
5c498b10 | 6683 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
72954a4f JM |
6684 | *no_add_attrs = true; |
6685 | } | |
6686 | ||
6687 | return NULL_TREE; | |
6688 | } | |
3d091dac KG |
6689 | |
6690 | /* Handle a "sentinel" attribute. */ | |
6691 | ||
6692 | static tree | |
254986c7 | 6693 | handle_sentinel_attribute (tree *node, tree name, tree args, |
3d091dac KG |
6694 | int ARG_UNUSED (flags), bool *no_add_attrs) |
6695 | { | |
6696 | tree params = TYPE_ARG_TYPES (*node); | |
6697 | ||
6698 | if (!params) | |
6699 | { | |
5c498b10 DD |
6700 | warning (OPT_Wattributes, |
6701 | "%qE attribute requires prototypes with named arguments", name); | |
3d091dac | 6702 | *no_add_attrs = true; |
3d091dac | 6703 | } |
254986c7 KG |
6704 | else |
6705 | { | |
6706 | while (TREE_CHAIN (params)) | |
6707 | params = TREE_CHAIN (params); | |
3d091dac | 6708 | |
254986c7 | 6709 | if (VOID_TYPE_P (TREE_VALUE (params))) |
c22cacf3 | 6710 | { |
5c498b10 DD |
6711 | warning (OPT_Wattributes, |
6712 | "%qE attribute only applies to variadic functions", name); | |
254986c7 KG |
6713 | *no_add_attrs = true; |
6714 | } | |
6715 | } | |
c22cacf3 | 6716 | |
254986c7 | 6717 | if (args) |
3d091dac | 6718 | { |
254986c7 KG |
6719 | tree position = TREE_VALUE (args); |
6720 | ||
254986c7 | 6721 | if (TREE_CODE (position) != INTEGER_CST) |
c22cacf3 | 6722 | { |
aa86a51b DM |
6723 | warning (OPT_Wattributes, |
6724 | "requested position is not an integer constant"); | |
254986c7 KG |
6725 | *no_add_attrs = true; |
6726 | } | |
6727 | else | |
c22cacf3 | 6728 | { |
254986c7 KG |
6729 | if (tree_int_cst_lt (position, integer_zero_node)) |
6730 | { | |
aa86a51b DM |
6731 | warning (OPT_Wattributes, |
6732 | "requested position is less than zero"); | |
254986c7 KG |
6733 | *no_add_attrs = true; |
6734 | } | |
6735 | } | |
3d091dac | 6736 | } |
c22cacf3 | 6737 | |
3d091dac KG |
6738 | return NULL_TREE; |
6739 | } | |
b5d32c25 KG |
6740 | |
6741 | /* Handle a "type_generic" attribute. */ | |
6742 | ||
6743 | static tree | |
6744 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
6745 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
6746 | bool * ARG_UNUSED (no_add_attrs)) | |
6747 | { | |
3bf5906b KG |
6748 | tree params; |
6749 | ||
6750 | /* Ensure we have a function type. */ | |
6751 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
6752 | ||
6753 | params = TYPE_ARG_TYPES (*node); | |
6754 | while (params && ! VOID_TYPE_P (TREE_VALUE (params))) | |
6755 | params = TREE_CHAIN (params); | |
6756 | ||
6757 | /* Ensure we have a variadic function. */ | |
6758 | gcc_assert (!params); | |
b5d32c25 KG |
6759 | |
6760 | return NULL_TREE; | |
6761 | } | |
b34c7881 | 6762 | \f |
94a0dd7b SL |
6763 | /* Check for valid arguments being passed to a function. |
6764 | ATTRS is a list of attributes. There are NARGS arguments in the array | |
6765 | ARGARRAY. TYPELIST is the list of argument types for the function. | |
6766 | */ | |
b34c7881 | 6767 | void |
94a0dd7b | 6768 | check_function_arguments (tree attrs, int nargs, tree *argarray, tree typelist) |
b34c7881 JT |
6769 | { |
6770 | /* Check for null being passed in a pointer argument that must be | |
6771 | non-null. We also need to do this if format checking is enabled. */ | |
6772 | ||
6773 | if (warn_nonnull) | |
94a0dd7b | 6774 | check_function_nonnull (attrs, nargs, argarray); |
b34c7881 JT |
6775 | |
6776 | /* Check for errors in format strings. */ | |
6777 | ||
7876a414 | 6778 | if (warn_format || warn_missing_format_attribute) |
94a0dd7b | 6779 | check_function_format (attrs, nargs, argarray); |
7876a414 KG |
6780 | |
6781 | if (warn_format) | |
94a0dd7b | 6782 | check_function_sentinel (attrs, nargs, argarray, typelist); |
b34c7881 JT |
6783 | } |
6784 | ||
6785 | /* Generic argument checking recursion routine. PARAM is the argument to | |
6786 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
6787 | once the argument is resolved. CTX is context for the callback. */ | |
6788 | void | |
35b1a6fa AJ |
6789 | check_function_arguments_recurse (void (*callback) |
6790 | (void *, tree, unsigned HOST_WIDE_INT), | |
6791 | void *ctx, tree param, | |
6792 | unsigned HOST_WIDE_INT param_num) | |
b34c7881 | 6793 | { |
1043771b | 6794 | if (CONVERT_EXPR_P (param) |
1344f9a3 JM |
6795 | && (TYPE_PRECISION (TREE_TYPE (param)) |
6796 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
b34c7881 JT |
6797 | { |
6798 | /* Strip coercion. */ | |
6799 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 6800 | TREE_OPERAND (param, 0), param_num); |
b34c7881 JT |
6801 | return; |
6802 | } | |
6803 | ||
6804 | if (TREE_CODE (param) == CALL_EXPR) | |
6805 | { | |
5039610b | 6806 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
b34c7881 JT |
6807 | tree attrs; |
6808 | bool found_format_arg = false; | |
6809 | ||
6810 | /* See if this is a call to a known internationalization function | |
6811 | that modifies a format arg. Such a function may have multiple | |
6812 | format_arg attributes (for example, ngettext). */ | |
6813 | ||
6814 | for (attrs = TYPE_ATTRIBUTES (type); | |
6815 | attrs; | |
6816 | attrs = TREE_CHAIN (attrs)) | |
6817 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
6818 | { | |
5039610b | 6819 | tree inner_arg; |
b34c7881 JT |
6820 | tree format_num_expr; |
6821 | int format_num; | |
6822 | int i; | |
5039610b | 6823 | call_expr_arg_iterator iter; |
b34c7881 JT |
6824 | |
6825 | /* Extract the argument number, which was previously checked | |
6826 | to be valid. */ | |
6827 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
b34c7881 | 6828 | |
366de0ce NS |
6829 | gcc_assert (TREE_CODE (format_num_expr) == INTEGER_CST |
6830 | && !TREE_INT_CST_HIGH (format_num_expr)); | |
b34c7881 JT |
6831 | |
6832 | format_num = TREE_INT_CST_LOW (format_num_expr); | |
6833 | ||
5039610b SL |
6834 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
6835 | inner_arg != 0; | |
6836 | inner_arg = next_call_expr_arg (&iter), i++) | |
b34c7881 JT |
6837 | if (i == format_num) |
6838 | { | |
6839 | check_function_arguments_recurse (callback, ctx, | |
5039610b | 6840 | inner_arg, param_num); |
b34c7881 JT |
6841 | found_format_arg = true; |
6842 | break; | |
6843 | } | |
6844 | } | |
6845 | ||
6846 | /* If we found a format_arg attribute and did a recursive check, | |
6847 | we are done with checking this argument. Otherwise, we continue | |
6848 | and this will be considered a non-literal. */ | |
6849 | if (found_format_arg) | |
6850 | return; | |
6851 | } | |
6852 | ||
6853 | if (TREE_CODE (param) == COND_EXPR) | |
6854 | { | |
6855 | /* Check both halves of the conditional expression. */ | |
6856 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 6857 | TREE_OPERAND (param, 1), param_num); |
b34c7881 | 6858 | check_function_arguments_recurse (callback, ctx, |
6de9cd9a | 6859 | TREE_OPERAND (param, 2), param_num); |
b34c7881 JT |
6860 | return; |
6861 | } | |
6862 | ||
6863 | (*callback) (ctx, param, param_num); | |
6864 | } | |
e2500fed | 6865 | |
83322951 RG |
6866 | /* Checks the number of arguments NARGS against the required number |
6867 | REQUIRED and issues an error if there is a mismatch. Returns true | |
6868 | if the number of arguments is correct, otherwise false. */ | |
6869 | ||
6870 | static bool | |
6871 | validate_nargs (tree fndecl, int nargs, int required) | |
6872 | { | |
6873 | if (nargs < required) | |
6874 | { | |
6875 | error ("not enough arguments to function %qE", fndecl); | |
6876 | return false; | |
6877 | } | |
6878 | else if (nargs > required) | |
6879 | { | |
6880 | error ("too many arguments to function %qE", fndecl); | |
6881 | return false; | |
6882 | } | |
6883 | return true; | |
6884 | } | |
6885 | ||
6886 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
6887 | Returns false if there was an error, otherwise true. */ | |
6888 | ||
6889 | bool | |
6890 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
6891 | { | |
6892 | if (!DECL_BUILT_IN (fndecl) | |
6893 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
6894 | return true; | |
6895 | ||
6896 | switch (DECL_FUNCTION_CODE (fndecl)) | |
6897 | { | |
6898 | case BUILT_IN_CONSTANT_P: | |
6899 | return validate_nargs (fndecl, nargs, 1); | |
6900 | ||
6901 | case BUILT_IN_ISFINITE: | |
6902 | case BUILT_IN_ISINF: | |
05f41289 | 6903 | case BUILT_IN_ISINF_SIGN: |
83322951 RG |
6904 | case BUILT_IN_ISNAN: |
6905 | case BUILT_IN_ISNORMAL: | |
6906 | if (validate_nargs (fndecl, nargs, 1)) | |
6907 | { | |
6908 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
6909 | { | |
6910 | error ("non-floating-point argument in call to " | |
6911 | "function %qE", fndecl); | |
6912 | return false; | |
6913 | } | |
6914 | return true; | |
6915 | } | |
6916 | return false; | |
6917 | ||
6918 | case BUILT_IN_ISGREATER: | |
6919 | case BUILT_IN_ISGREATEREQUAL: | |
6920 | case BUILT_IN_ISLESS: | |
6921 | case BUILT_IN_ISLESSEQUAL: | |
6922 | case BUILT_IN_ISLESSGREATER: | |
6923 | case BUILT_IN_ISUNORDERED: | |
6924 | if (validate_nargs (fndecl, nargs, 2)) | |
6925 | { | |
6926 | enum tree_code code0, code1; | |
6927 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
6928 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
6929 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
6930 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
6931 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
6932 | { | |
6933 | error ("non-floating-point arguments in call to " | |
6934 | "function %qE", fndecl); | |
6935 | return false; | |
6936 | } | |
6937 | return true; | |
6938 | } | |
6939 | return false; | |
6940 | ||
3bf5906b KG |
6941 | case BUILT_IN_FPCLASSIFY: |
6942 | if (validate_nargs (fndecl, nargs, 6)) | |
6943 | { | |
6944 | unsigned i; | |
6945 | ||
6946 | for (i=0; i<5; i++) | |
6947 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
6948 | { | |
6949 | error ("non-const integer argument %u in call to function %qE", | |
6950 | i+1, fndecl); | |
6951 | return false; | |
6952 | } | |
6953 | ||
6954 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
6955 | { | |
6956 | error ("non-floating-point argument in call to function %qE", | |
6957 | fndecl); | |
6958 | return false; | |
6959 | } | |
6960 | return true; | |
6961 | } | |
6962 | return false; | |
6963 | ||
83322951 RG |
6964 | default: |
6965 | return true; | |
6966 | } | |
6967 | } | |
6968 | ||
d07605f5 AP |
6969 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
6970 | ||
6971 | int | |
6972 | field_decl_cmp (const void *x_p, const void *y_p) | |
6973 | { | |
28dab132 BI |
6974 | const tree *const x = (const tree *const) x_p; |
6975 | const tree *const y = (const tree *const) y_p; | |
6976 | ||
d07605f5 AP |
6977 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
6978 | /* A nontype is "greater" than a type. */ | |
6979 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
6980 | if (DECL_NAME (*x) == NULL_TREE) | |
6981 | return -1; | |
6982 | if (DECL_NAME (*y) == NULL_TREE) | |
6983 | return 1; | |
6984 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
6985 | return -1; | |
6986 | return 1; | |
6987 | } | |
6988 | ||
6989 | static struct { | |
6990 | gt_pointer_operator new_value; | |
6991 | void *cookie; | |
6992 | } resort_data; | |
6993 | ||
6994 | /* This routine compares two fields like field_decl_cmp but using the | |
6995 | pointer operator in resort_data. */ | |
6996 | ||
6997 | static int | |
6998 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
6999 | { | |
28dab132 BI |
7000 | const tree *const x = (const tree *const) x_p; |
7001 | const tree *const y = (const tree *const) y_p; | |
d07605f5 AP |
7002 | |
7003 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
7004 | /* A nontype is "greater" than a type. */ | |
7005 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
7006 | if (DECL_NAME (*x) == NULL_TREE) | |
7007 | return -1; | |
7008 | if (DECL_NAME (*y) == NULL_TREE) | |
7009 | return 1; | |
7010 | { | |
7011 | tree d1 = DECL_NAME (*x); | |
7012 | tree d2 = DECL_NAME (*y); | |
7013 | resort_data.new_value (&d1, resort_data.cookie); | |
7014 | resort_data.new_value (&d2, resort_data.cookie); | |
7015 | if (d1 < d2) | |
7016 | return -1; | |
7017 | } | |
7018 | return 1; | |
7019 | } | |
7020 | ||
7021 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
7022 | ||
7023 | void | |
7024 | resort_sorted_fields (void *obj, | |
e18476eb | 7025 | void * ARG_UNUSED (orig_obj), |
6de9cd9a DN |
7026 | gt_pointer_operator new_value, |
7027 | void *cookie) | |
d07605f5 | 7028 | { |
e18476eb | 7029 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
d07605f5 AP |
7030 | resort_data.new_value = new_value; |
7031 | resort_data.cookie = cookie; | |
7032 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
6de9cd9a | 7033 | resort_field_decl_cmp); |
d07605f5 AP |
7034 | } |
7035 | ||
0a3ee0fd GDR |
7036 | /* Subroutine of c_parse_error. |
7037 | Return the result of concatenating LHS and RHS. RHS is really | |
7038 | a string literal, its first character is indicated by RHS_START and | |
3292fb42 | 7039 | RHS_SIZE is its length (including the terminating NUL character). |
0a3ee0fd GDR |
7040 | |
7041 | The caller is responsible for deleting the returned pointer. */ | |
7042 | ||
7043 | static char * | |
7044 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
7045 | { | |
7046 | const int lhs_size = strlen (lhs); | |
7047 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
7048 | strncpy (result, lhs, lhs_size); | |
7049 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
7050 | return result; | |
7051 | } | |
7052 | ||
4b794eaf | 7053 | /* Issue the error given by GMSGID, indicating that it occurred before |
4bb8ca28 MM |
7054 | TOKEN, which had the associated VALUE. */ |
7055 | ||
7056 | void | |
4b794eaf | 7057 | c_parse_error (const char *gmsgid, enum cpp_ttype token, tree value) |
4bb8ca28 | 7058 | { |
0a3ee0fd GDR |
7059 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
7060 | ||
7061 | char *message = NULL; | |
4bb8ca28 MM |
7062 | |
7063 | if (token == CPP_EOF) | |
4b794eaf | 7064 | message = catenate_messages (gmsgid, " at end of input"); |
b6baa67d KVH |
7065 | else if (token == CPP_CHAR || token == CPP_WCHAR || token == CPP_CHAR16 |
7066 | || token == CPP_CHAR32) | |
4bb8ca28 MM |
7067 | { |
7068 | unsigned int val = TREE_INT_CST_LOW (value); | |
b6baa67d KVH |
7069 | const char *prefix; |
7070 | ||
7071 | switch (token) | |
7072 | { | |
7073 | default: | |
7074 | prefix = ""; | |
7075 | break; | |
7076 | case CPP_WCHAR: | |
7077 | prefix = "L"; | |
7078 | break; | |
7079 | case CPP_CHAR16: | |
7080 | prefix = "u"; | |
7081 | break; | |
7082 | case CPP_CHAR32: | |
7083 | prefix = "U"; | |
7084 | break; | |
7085 | } | |
7086 | ||
4bb8ca28 | 7087 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
c22cacf3 | 7088 | message = catenate_messages (gmsgid, " before %s'%c'"); |
4bb8ca28 | 7089 | else |
c22cacf3 | 7090 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
0a3ee0fd | 7091 | |
b6baa67d | 7092 | error (message, prefix, val); |
0a3ee0fd GDR |
7093 | free (message); |
7094 | message = NULL; | |
4bb8ca28 | 7095 | } |
b6baa67d KVH |
7096 | else if (token == CPP_STRING || token == CPP_WSTRING || token == CPP_STRING16 |
7097 | || token == CPP_STRING32) | |
4b794eaf | 7098 | message = catenate_messages (gmsgid, " before string constant"); |
4bb8ca28 | 7099 | else if (token == CPP_NUMBER) |
4b794eaf | 7100 | message = catenate_messages (gmsgid, " before numeric constant"); |
4bb8ca28 | 7101 | else if (token == CPP_NAME) |
0a3ee0fd | 7102 | { |
4b794eaf | 7103 | message = catenate_messages (gmsgid, " before %qE"); |
c51a1ba9 | 7104 | error (message, value); |
0a3ee0fd GDR |
7105 | free (message); |
7106 | message = NULL; | |
7107 | } | |
bc4071dd RH |
7108 | else if (token == CPP_PRAGMA) |
7109 | message = catenate_messages (gmsgid, " before %<#pragma%>"); | |
7110 | else if (token == CPP_PRAGMA_EOL) | |
7111 | message = catenate_messages (gmsgid, " before end of line"); | |
4bb8ca28 | 7112 | else if (token < N_TTYPES) |
0a3ee0fd | 7113 | { |
4b794eaf | 7114 | message = catenate_messages (gmsgid, " before %qs token"); |
0a3ee0fd GDR |
7115 | error (message, cpp_type2name (token)); |
7116 | free (message); | |
7117 | message = NULL; | |
7118 | } | |
4bb8ca28 | 7119 | else |
4b794eaf | 7120 | error (gmsgid); |
0a3ee0fd GDR |
7121 | |
7122 | if (message) | |
7123 | { | |
7124 | error (message); | |
7125 | free (message); | |
7126 | } | |
c22cacf3 | 7127 | #undef catenate_messages |
4bb8ca28 MM |
7128 | } |
7129 | ||
6de9cd9a DN |
7130 | /* Walk a gimplified function and warn for functions whose return value is |
7131 | ignored and attribute((warn_unused_result)) is set. This is done before | |
9f63daea EC |
7132 | inlining, so we don't have to worry about that. */ |
7133 | ||
6de9cd9a DN |
7134 | void |
7135 | c_warn_unused_result (tree *top_p) | |
7136 | { | |
7137 | tree t = *top_p; | |
7138 | tree_stmt_iterator i; | |
7139 | tree fdecl, ftype; | |
7140 | ||
7141 | switch (TREE_CODE (t)) | |
7142 | { | |
7143 | case STATEMENT_LIST: | |
7144 | for (i = tsi_start (*top_p); !tsi_end_p (i); tsi_next (&i)) | |
7145 | c_warn_unused_result (tsi_stmt_ptr (i)); | |
7146 | break; | |
7147 | ||
7148 | case COND_EXPR: | |
7149 | c_warn_unused_result (&COND_EXPR_THEN (t)); | |
7150 | c_warn_unused_result (&COND_EXPR_ELSE (t)); | |
7151 | break; | |
7152 | case BIND_EXPR: | |
7153 | c_warn_unused_result (&BIND_EXPR_BODY (t)); | |
7154 | break; | |
7155 | case TRY_FINALLY_EXPR: | |
7156 | case TRY_CATCH_EXPR: | |
7157 | c_warn_unused_result (&TREE_OPERAND (t, 0)); | |
7158 | c_warn_unused_result (&TREE_OPERAND (t, 1)); | |
7159 | break; | |
7160 | case CATCH_EXPR: | |
7161 | c_warn_unused_result (&CATCH_BODY (t)); | |
7162 | break; | |
7163 | case EH_FILTER_EXPR: | |
7164 | c_warn_unused_result (&EH_FILTER_FAILURE (t)); | |
7165 | break; | |
7166 | ||
7167 | case CALL_EXPR: | |
5201931e JM |
7168 | if (TREE_USED (t)) |
7169 | break; | |
7170 | ||
6de9cd9a DN |
7171 | /* This is a naked call, as opposed to a CALL_EXPR nested inside |
7172 | a MODIFY_EXPR. All calls whose value is ignored should be | |
7173 | represented like this. Look for the attribute. */ | |
7174 | fdecl = get_callee_fndecl (t); | |
7175 | if (fdecl) | |
7176 | ftype = TREE_TYPE (fdecl); | |
7177 | else | |
7178 | { | |
5039610b | 7179 | ftype = TREE_TYPE (CALL_EXPR_FN (t)); |
6de9cd9a DN |
7180 | /* Look past pointer-to-function to the function type itself. */ |
7181 | ftype = TREE_TYPE (ftype); | |
7182 | } | |
7183 | ||
7184 | if (lookup_attribute ("warn_unused_result", TYPE_ATTRIBUTES (ftype))) | |
7185 | { | |
7186 | if (fdecl) | |
d4ee4d25 | 7187 | warning (0, "%Hignoring return value of %qD, " |
6de9cd9a DN |
7188 | "declared with attribute warn_unused_result", |
7189 | EXPR_LOCUS (t), fdecl); | |
7190 | else | |
d4ee4d25 | 7191 | warning (0, "%Hignoring return value of function " |
6de9cd9a DN |
7192 | "declared with attribute warn_unused_result", |
7193 | EXPR_LOCUS (t)); | |
7194 | } | |
7195 | break; | |
7196 | ||
7197 | default: | |
7198 | /* Not a container, not a call, or a call whose value is used. */ | |
7199 | break; | |
7200 | } | |
7201 | } | |
7202 | ||
c5ff069d ZW |
7203 | /* Convert a character from the host to the target execution character |
7204 | set. cpplib handles this, mostly. */ | |
7205 | ||
7206 | HOST_WIDE_INT | |
7207 | c_common_to_target_charset (HOST_WIDE_INT c) | |
7208 | { | |
7209 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
7210 | zero-extended under -fno-signed-char. cpplib insists that characters | |
7211 | and character constants are always unsigned. Hence we must convert | |
7212 | back and forth. */ | |
7213 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
7214 | ||
7215 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
7216 | ||
7217 | if (flag_signed_char) | |
7218 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
7219 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
7220 | else | |
7221 | return uc; | |
7222 | } | |
7223 | ||
ee8a6a3e | 7224 | /* Build the result of __builtin_offsetof. EXPR is a nested sequence of |
6d4d7b0e PB |
7225 | component references, with STOP_REF, or alternatively an INDIRECT_REF of |
7226 | NULL, at the bottom; much like the traditional rendering of offsetof as a | |
7227 | macro. Returns the folded and properly cast result. */ | |
ee8a6a3e RH |
7228 | |
7229 | static tree | |
6d4d7b0e | 7230 | fold_offsetof_1 (tree expr, tree stop_ref) |
ee8a6a3e RH |
7231 | { |
7232 | enum tree_code code = PLUS_EXPR; | |
7233 | tree base, off, t; | |
7234 | ||
6d4d7b0e PB |
7235 | if (expr == stop_ref && TREE_CODE (expr) != ERROR_MARK) |
7236 | return size_zero_node; | |
7237 | ||
ee8a6a3e RH |
7238 | switch (TREE_CODE (expr)) |
7239 | { | |
7240 | case ERROR_MARK: | |
7241 | return expr; | |
7242 | ||
545b7d8c VR |
7243 | case VAR_DECL: |
7244 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
7245 | return error_mark_node; | |
7246 | ||
6d4d7b0e PB |
7247 | case CALL_EXPR: |
7248 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); | |
7249 | return error_mark_node; | |
7250 | ||
7251 | case INTEGER_CST: | |
7252 | gcc_assert (integer_zerop (expr)); | |
ee8a6a3e RH |
7253 | return size_zero_node; |
7254 | ||
6d4d7b0e PB |
7255 | case NOP_EXPR: |
7256 | case INDIRECT_REF: | |
7257 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); | |
7258 | gcc_assert (base == error_mark_node || base == size_zero_node); | |
7259 | return base; | |
7260 | ||
ee8a6a3e | 7261 | case COMPONENT_REF: |
6d4d7b0e | 7262 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
ee8a6a3e RH |
7263 | if (base == error_mark_node) |
7264 | return base; | |
7265 | ||
7266 | t = TREE_OPERAND (expr, 1); | |
7267 | if (DECL_C_BIT_FIELD (t)) | |
7268 | { | |
7269 | error ("attempt to take address of bit-field structure " | |
c51a1ba9 | 7270 | "member %qD", t); |
ee8a6a3e RH |
7271 | return error_mark_node; |
7272 | } | |
7273 | off = size_binop (PLUS_EXPR, DECL_FIELD_OFFSET (t), | |
7274 | size_int (tree_low_cst (DECL_FIELD_BIT_OFFSET (t), 1) | |
7275 | / BITS_PER_UNIT)); | |
7276 | break; | |
7277 | ||
7278 | case ARRAY_REF: | |
6d4d7b0e | 7279 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
ee8a6a3e RH |
7280 | if (base == error_mark_node) |
7281 | return base; | |
7282 | ||
7283 | t = TREE_OPERAND (expr, 1); | |
7284 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) < 0) | |
7285 | { | |
7286 | code = MINUS_EXPR; | |
987b67bc | 7287 | t = fold_build1 (NEGATE_EXPR, TREE_TYPE (t), t); |
ee8a6a3e RH |
7288 | } |
7289 | t = convert (sizetype, t); | |
7290 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
7291 | break; | |
7292 | ||
1916c916 VR |
7293 | case COMPOUND_EXPR: |
7294 | /* Handle static members of volatile structs. */ | |
7295 | t = TREE_OPERAND (expr, 1); | |
7296 | gcc_assert (TREE_CODE (t) == VAR_DECL); | |
7297 | return fold_offsetof_1 (t, stop_ref); | |
7298 | ||
ee8a6a3e | 7299 | default: |
366de0ce | 7300 | gcc_unreachable (); |
ee8a6a3e RH |
7301 | } |
7302 | ||
7303 | return size_binop (code, base, off); | |
7304 | } | |
7305 | ||
7306 | tree | |
6d4d7b0e | 7307 | fold_offsetof (tree expr, tree stop_ref) |
ee8a6a3e RH |
7308 | { |
7309 | /* Convert back from the internal sizetype to size_t. */ | |
6d4d7b0e | 7310 | return convert (size_type_node, fold_offsetof_1 (expr, stop_ref)); |
ee8a6a3e RH |
7311 | } |
7312 | ||
37dc0d8d | 7313 | /* Print an error message for an invalid lvalue. USE says |
5ae9ba3e MM |
7314 | how the lvalue is being used and so selects the error message. */ |
7315 | ||
37dc0d8d JM |
7316 | void |
7317 | lvalue_error (enum lvalue_use use) | |
5ae9ba3e | 7318 | { |
37dc0d8d | 7319 | switch (use) |
5ae9ba3e | 7320 | { |
37dc0d8d | 7321 | case lv_assign: |
5d352b2d | 7322 | error ("lvalue required as left operand of assignment"); |
37dc0d8d JM |
7323 | break; |
7324 | case lv_increment: | |
5d352b2d | 7325 | error ("lvalue required as increment operand"); |
37dc0d8d JM |
7326 | break; |
7327 | case lv_decrement: | |
5d352b2d | 7328 | error ("lvalue required as decrement operand"); |
37dc0d8d JM |
7329 | break; |
7330 | case lv_addressof: | |
5d352b2d | 7331 | error ("lvalue required as unary %<&%> operand"); |
37dc0d8d JM |
7332 | break; |
7333 | case lv_asm: | |
5d352b2d | 7334 | error ("lvalue required in asm statement"); |
37dc0d8d JM |
7335 | break; |
7336 | default: | |
7337 | gcc_unreachable (); | |
5ae9ba3e | 7338 | } |
5ae9ba3e | 7339 | } |
aab038d5 RH |
7340 | \f |
7341 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
7342 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
7343 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
7344 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
7345 | ||
7346 | int | |
7347 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
7348 | { | |
7349 | tree maxindex, type, main_type, elt, unqual_elt; | |
7350 | int failure = 0, quals; | |
06d40de8 | 7351 | hashval_t hashcode = 0; |
aab038d5 RH |
7352 | |
7353 | maxindex = size_zero_node; | |
7354 | if (initial_value) | |
7355 | { | |
7356 | if (TREE_CODE (initial_value) == STRING_CST) | |
7357 | { | |
7358 | int eltsize | |
7359 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
7360 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
7361 | } | |
7362 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
7363 | { | |
4038c495 | 7364 | VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value); |
aab038d5 | 7365 | |
4038c495 | 7366 | if (VEC_empty (constructor_elt, v)) |
aab038d5 RH |
7367 | { |
7368 | if (pedantic) | |
7369 | failure = 3; | |
7370 | maxindex = integer_minus_one_node; | |
7371 | } | |
7372 | else | |
7373 | { | |
7374 | tree curindex; | |
4038c495 GB |
7375 | unsigned HOST_WIDE_INT cnt; |
7376 | constructor_elt *ce; | |
aab038d5 | 7377 | |
4038c495 GB |
7378 | if (VEC_index (constructor_elt, v, 0)->index) |
7379 | maxindex = fold_convert (sizetype, | |
7380 | VEC_index (constructor_elt, | |
7381 | v, 0)->index); | |
aab038d5 RH |
7382 | curindex = maxindex; |
7383 | ||
4038c495 GB |
7384 | for (cnt = 1; |
7385 | VEC_iterate (constructor_elt, v, cnt, ce); | |
7386 | cnt++) | |
aab038d5 | 7387 | { |
4038c495 GB |
7388 | if (ce->index) |
7389 | curindex = fold_convert (sizetype, ce->index); | |
aab038d5 RH |
7390 | else |
7391 | curindex = size_binop (PLUS_EXPR, curindex, size_one_node); | |
7392 | ||
7393 | if (tree_int_cst_lt (maxindex, curindex)) | |
7394 | maxindex = curindex; | |
7395 | } | |
7396 | } | |
7397 | } | |
7398 | else | |
7399 | { | |
7400 | /* Make an error message unless that happened already. */ | |
7401 | if (initial_value != error_mark_node) | |
7402 | failure = 1; | |
7403 | } | |
7404 | } | |
7405 | else | |
7406 | { | |
7407 | failure = 2; | |
7408 | if (!do_default) | |
7409 | return failure; | |
7410 | } | |
7411 | ||
7412 | type = *ptype; | |
7413 | elt = TREE_TYPE (type); | |
7414 | quals = TYPE_QUALS (strip_array_types (elt)); | |
7415 | if (quals == 0) | |
7416 | unqual_elt = elt; | |
7417 | else | |
7418 | unqual_elt = c_build_qualified_type (elt, TYPE_UNQUALIFIED); | |
7419 | ||
7420 | /* Using build_distinct_type_copy and modifying things afterward instead | |
7421 | of using build_array_type to create a new type preserves all of the | |
7422 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
7423 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
7424 | TREE_TYPE (main_type) = unqual_elt; | |
7425 | TYPE_DOMAIN (main_type) = build_index_type (maxindex); | |
7426 | layout_type (main_type); | |
7427 | ||
06d40de8 DG |
7428 | /* Make sure we have the canonical MAIN_TYPE. */ |
7429 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
7430 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), | |
7431 | hashcode); | |
7432 | main_type = type_hash_canon (hashcode, main_type); | |
7433 | ||
9ae165a0 DG |
7434 | /* Fix the canonical type. */ |
7435 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
7436 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
7437 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
7438 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
7439 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
7440 | != TYPE_DOMAIN (main_type))) | |
7441 | TYPE_CANONICAL (main_type) | |
7442 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), | |
7443 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
7444 | else | |
7445 | TYPE_CANONICAL (main_type) = main_type; | |
7446 | ||
aab038d5 RH |
7447 | if (quals == 0) |
7448 | type = main_type; | |
7449 | else | |
7450 | type = c_build_qualified_type (main_type, quals); | |
7451 | ||
7bfcb402 JM |
7452 | if (COMPLETE_TYPE_P (type) |
7453 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
7454 | && TREE_OVERFLOW (TYPE_SIZE_UNIT (type))) | |
7455 | { | |
7456 | error ("size of array is too large"); | |
7457 | /* If we proceed with the array type as it is, we'll eventually | |
7458 | crash in tree_low_cst(). */ | |
7459 | type = error_mark_node; | |
7460 | } | |
7461 | ||
aab038d5 RH |
7462 | *ptype = type; |
7463 | return failure; | |
7464 | } | |
5ae9ba3e | 7465 | |
48ae6c13 RH |
7466 | \f |
7467 | /* Used to help initialize the builtin-types.def table. When a type of | |
7468 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
7469 | The later results in segfaults even when a decl using the type doesn't | |
7470 | get invoked. */ | |
7471 | ||
7472 | tree | |
7473 | builtin_type_for_size (int size, bool unsignedp) | |
7474 | { | |
7475 | tree type = lang_hooks.types.type_for_size (size, unsignedp); | |
7476 | return type ? type : error_mark_node; | |
7477 | } | |
7478 | ||
7479 | /* A helper function for resolve_overloaded_builtin in resolving the | |
7480 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
7481 | first operand of PARAMS is a pointer to a supported data type. | |
7482 | Returns 0 if an error is encountered. */ | |
7483 | ||
7484 | static int | |
7485 | sync_resolve_size (tree function, tree params) | |
7486 | { | |
7487 | tree type; | |
7488 | int size; | |
7489 | ||
7490 | if (params == NULL) | |
7491 | { | |
7492 | error ("too few arguments to function %qE", function); | |
7493 | return 0; | |
7494 | } | |
7495 | ||
7496 | type = TREE_TYPE (TREE_VALUE (params)); | |
7497 | if (TREE_CODE (type) != POINTER_TYPE) | |
7498 | goto incompatible; | |
7499 | ||
7500 | type = TREE_TYPE (type); | |
7501 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
7502 | goto incompatible; | |
7503 | ||
7504 | size = tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
a0274e3e | 7505 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
48ae6c13 RH |
7506 | return size; |
7507 | ||
7508 | incompatible: | |
7509 | error ("incompatible type for argument %d of %qE", 1, function); | |
7510 | return 0; | |
7511 | } | |
7512 | ||
c22cacf3 | 7513 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
48ae6c13 RH |
7514 | PARAMS to make arguments match up with those of FUNCTION. Drops |
7515 | the variadic arguments at the end. Returns false if some error | |
7516 | was encountered; true on success. */ | |
7517 | ||
7518 | static bool | |
7519 | sync_resolve_params (tree orig_function, tree function, tree params) | |
7520 | { | |
7521 | tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); | |
7522 | tree ptype; | |
7523 | int number; | |
7524 | ||
7525 | /* We've declared the implementation functions to use "volatile void *" | |
7526 | as the pointer parameter, so we shouldn't get any complaints from the | |
7527 | call to check_function_arguments what ever type the user used. */ | |
7528 | arg_types = TREE_CHAIN (arg_types); | |
7529 | ptype = TREE_TYPE (TREE_TYPE (TREE_VALUE (params))); | |
7530 | number = 2; | |
7531 | ||
7532 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
7533 | don't get warnings for passing pointer types, etc. */ | |
7534 | while (arg_types != void_list_node) | |
7535 | { | |
7536 | tree val; | |
7537 | ||
7538 | params = TREE_CHAIN (params); | |
7539 | if (params == NULL) | |
7540 | { | |
7541 | error ("too few arguments to function %qE", orig_function); | |
7542 | return false; | |
7543 | } | |
7544 | ||
7545 | /* ??? Ideally for the first conversion we'd use convert_for_assignment | |
7546 | so that we get warnings for anything that doesn't match the pointer | |
7547 | type. This isn't portable across the C and C++ front ends atm. */ | |
7548 | val = TREE_VALUE (params); | |
7549 | val = convert (ptype, val); | |
7550 | val = convert (TREE_VALUE (arg_types), val); | |
7551 | TREE_VALUE (params) = val; | |
7552 | ||
7553 | arg_types = TREE_CHAIN (arg_types); | |
7554 | number++; | |
7555 | } | |
7556 | ||
7557 | /* The definition of these primitives is variadic, with the remaining | |
7558 | being "an optional list of variables protected by the memory barrier". | |
7559 | No clue what that's supposed to mean, precisely, but we consider all | |
7560 | call-clobbered variables to be protected so we're safe. */ | |
7561 | TREE_CHAIN (params) = NULL; | |
7562 | ||
7563 | return true; | |
7564 | } | |
7565 | ||
c22cacf3 | 7566 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
48ae6c13 RH |
7567 | RESULT to make it match the type of the first pointer argument in |
7568 | PARAMS. */ | |
7569 | ||
7570 | static tree | |
7571 | sync_resolve_return (tree params, tree result) | |
7572 | { | |
7573 | tree ptype = TREE_TYPE (TREE_TYPE (TREE_VALUE (params))); | |
99db1ef0 | 7574 | ptype = TYPE_MAIN_VARIANT (ptype); |
48ae6c13 RH |
7575 | return convert (ptype, result); |
7576 | } | |
7577 | ||
7578 | /* Some builtin functions are placeholders for other expressions. This | |
7579 | function should be called immediately after parsing the call expression | |
7580 | before surrounding code has committed to the type of the expression. | |
7581 | ||
7582 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. | |
7583 | PARAMS is the argument list for the call. The return value is non-null | |
7584 | when expansion is complete, and null if normal processing should | |
7585 | continue. */ | |
7586 | ||
7587 | tree | |
7588 | resolve_overloaded_builtin (tree function, tree params) | |
7589 | { | |
7590 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
58646b77 PB |
7591 | switch (DECL_BUILT_IN_CLASS (function)) |
7592 | { | |
7593 | case BUILT_IN_NORMAL: | |
7594 | break; | |
7595 | case BUILT_IN_MD: | |
7596 | if (targetm.resolve_overloaded_builtin) | |
c22cacf3 | 7597 | return targetm.resolve_overloaded_builtin (function, params); |
58646b77 | 7598 | else |
c22cacf3 | 7599 | return NULL_TREE; |
58646b77 PB |
7600 | default: |
7601 | return NULL_TREE; | |
7602 | } | |
c22cacf3 | 7603 | |
58646b77 | 7604 | /* Handle BUILT_IN_NORMAL here. */ |
48ae6c13 RH |
7605 | switch (orig_code) |
7606 | { | |
7607 | case BUILT_IN_FETCH_AND_ADD_N: | |
7608 | case BUILT_IN_FETCH_AND_SUB_N: | |
7609 | case BUILT_IN_FETCH_AND_OR_N: | |
7610 | case BUILT_IN_FETCH_AND_AND_N: | |
7611 | case BUILT_IN_FETCH_AND_XOR_N: | |
7612 | case BUILT_IN_FETCH_AND_NAND_N: | |
7613 | case BUILT_IN_ADD_AND_FETCH_N: | |
7614 | case BUILT_IN_SUB_AND_FETCH_N: | |
7615 | case BUILT_IN_OR_AND_FETCH_N: | |
7616 | case BUILT_IN_AND_AND_FETCH_N: | |
7617 | case BUILT_IN_XOR_AND_FETCH_N: | |
7618 | case BUILT_IN_NAND_AND_FETCH_N: | |
7619 | case BUILT_IN_BOOL_COMPARE_AND_SWAP_N: | |
7620 | case BUILT_IN_VAL_COMPARE_AND_SWAP_N: | |
7621 | case BUILT_IN_LOCK_TEST_AND_SET_N: | |
7622 | case BUILT_IN_LOCK_RELEASE_N: | |
7623 | { | |
7624 | int n = sync_resolve_size (function, params); | |
7625 | tree new_function, result; | |
7626 | ||
7627 | if (n == 0) | |
7628 | return error_mark_node; | |
7629 | ||
7630 | new_function = built_in_decls[orig_code + exact_log2 (n) + 1]; | |
7631 | if (!sync_resolve_params (function, new_function, params)) | |
7632 | return error_mark_node; | |
7633 | ||
7634 | result = build_function_call (new_function, params); | |
7635 | if (orig_code != BUILT_IN_BOOL_COMPARE_AND_SWAP_N | |
7636 | && orig_code != BUILT_IN_LOCK_RELEASE_N) | |
7637 | result = sync_resolve_return (params, result); | |
7638 | ||
7639 | return result; | |
7640 | } | |
7641 | ||
7642 | default: | |
58646b77 | 7643 | return NULL_TREE; |
48ae6c13 RH |
7644 | } |
7645 | } | |
7646 | ||
5bed876a AH |
7647 | /* Ignoring their sign, return true if two scalar types are the same. */ |
7648 | bool | |
7649 | same_scalar_type_ignoring_signedness (tree t1, tree t2) | |
7650 | { | |
7651 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); | |
7652 | ||
ab22c1fa CF |
7653 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
7654 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
7655 | || c2 == FIXED_POINT_TYPE)); | |
5bed876a AH |
7656 | |
7657 | /* Equality works here because c_common_signed_type uses | |
7658 | TYPE_MAIN_VARIANT. */ | |
12753674 RE |
7659 | return c_common_signed_type (t1) |
7660 | == c_common_signed_type (t2); | |
5bed876a AH |
7661 | } |
7662 | ||
104f8784 KG |
7663 | /* Check for missing format attributes on function pointers. LTYPE is |
7664 | the new type or left-hand side type. RTYPE is the old type or | |
7665 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
7666 | attribute. */ | |
7667 | ||
7668 | bool | |
7669 | check_missing_format_attribute (tree ltype, tree rtype) | |
7670 | { | |
7671 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
7672 | tree ra; | |
7673 | ||
7674 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
7675 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
7676 | break; | |
7677 | if (ra) | |
7678 | { | |
7679 | tree la; | |
7680 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
7681 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
7682 | break; | |
7683 | return !la; | |
7684 | } | |
7685 | else | |
7686 | return false; | |
7687 | } | |
7688 | ||
ff6b6641 GDR |
7689 | /* Subscripting with type char is likely to lose on a machine where |
7690 | chars are signed. So warn on any machine, but optionally. Don't | |
7691 | warn for unsigned char since that type is safe. Don't warn for | |
7692 | signed char because anyone who uses that must have done so | |
7693 | deliberately. Furthermore, we reduce the false positive load by | |
7694 | warning only for non-constant value of type char. */ | |
7695 | ||
7696 | void | |
7697 | warn_array_subscript_with_type_char (tree index) | |
7698 | { | |
7699 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
7700 | && TREE_CODE (index) != INTEGER_CST) | |
7701 | warning (OPT_Wchar_subscripts, "array subscript has type %<char%>"); | |
7702 | } | |
7703 | ||
2a67bec2 ILT |
7704 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
7705 | cover cases like x + y << z which readers are likely to | |
7706 | misinterpret. We have seen an expression in which CODE is a binary | |
7707 | operator used to combine expressions headed by CODE_LEFT and | |
7708 | CODE_RIGHT. CODE_LEFT and CODE_RIGHT may be ERROR_MARK, which | |
7709 | means that that side of the expression was not formed using a | |
7710 | binary operator, or it was enclosed in parentheses. */ | |
7711 | ||
7712 | void | |
7713 | warn_about_parentheses (enum tree_code code, enum tree_code code_left, | |
7714 | enum tree_code code_right) | |
7715 | { | |
7716 | if (!warn_parentheses) | |
7717 | return; | |
7718 | ||
7719 | if (code == LSHIFT_EXPR || code == RSHIFT_EXPR) | |
7720 | { | |
7721 | if (code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
7722 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
7723 | warning (OPT_Wparentheses, | |
7724 | "suggest parentheses around + or - inside shift"); | |
7725 | } | |
7726 | ||
7727 | if (code == TRUTH_ORIF_EXPR) | |
7728 | { | |
7729 | if (code_left == TRUTH_ANDIF_EXPR | |
7730 | || code_right == TRUTH_ANDIF_EXPR) | |
7731 | warning (OPT_Wparentheses, | |
7732 | "suggest parentheses around && within ||"); | |
7733 | } | |
7734 | ||
7735 | if (code == BIT_IOR_EXPR) | |
7736 | { | |
7737 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR | |
7738 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
7739 | || code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
7740 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
7741 | warning (OPT_Wparentheses, | |
7742 | "suggest parentheses around arithmetic in operand of |"); | |
7743 | /* Check cases like x|y==z */ | |
7744 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
7745 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
7746 | warning (OPT_Wparentheses, | |
7747 | "suggest parentheses around comparison in operand of |"); | |
7748 | } | |
7749 | ||
7750 | if (code == BIT_XOR_EXPR) | |
7751 | { | |
7752 | if (code_left == BIT_AND_EXPR | |
7753 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
7754 | || code_right == BIT_AND_EXPR | |
7755 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
7756 | warning (OPT_Wparentheses, | |
7757 | "suggest parentheses around arithmetic in operand of ^"); | |
7758 | /* Check cases like x^y==z */ | |
7759 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
7760 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
7761 | warning (OPT_Wparentheses, | |
7762 | "suggest parentheses around comparison in operand of ^"); | |
7763 | } | |
7764 | ||
7765 | if (code == BIT_AND_EXPR) | |
7766 | { | |
7767 | if (code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
7768 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
7769 | warning (OPT_Wparentheses, | |
7770 | "suggest parentheses around + or - in operand of &"); | |
7771 | /* Check cases like x&y==z */ | |
7772 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
7773 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
7774 | warning (OPT_Wparentheses, | |
7775 | "suggest parentheses around comparison in operand of &"); | |
7776 | } | |
7777 | ||
e7917d06 DM |
7778 | if (code == EQ_EXPR || code == NE_EXPR) |
7779 | { | |
7780 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
7781 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
7782 | warning (OPT_Wparentheses, | |
7783 | "suggest parentheses around comparison in operand of %s", | |
7784 | code == EQ_EXPR ? "==" : "!="); | |
7785 | } | |
7786 | else if (TREE_CODE_CLASS (code) == tcc_comparison) | |
7787 | { | |
7788 | if ((TREE_CODE_CLASS (code_left) == tcc_comparison | |
7789 | && code_left != NE_EXPR && code_left != EQ_EXPR) | |
7790 | || (TREE_CODE_CLASS (code_right) == tcc_comparison | |
7791 | && code_right != NE_EXPR && code_right != EQ_EXPR)) | |
7792 | warning (OPT_Wparentheses, "comparisons like X<=Y<=Z do not " | |
7793 | "have their mathematical meaning"); | |
7794 | } | |
2a67bec2 ILT |
7795 | } |
7796 | ||
c616e51b MLI |
7797 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
7798 | ||
7799 | void | |
7800 | warn_for_unused_label (tree label) | |
7801 | { | |
7802 | if (!TREE_USED (label)) | |
7803 | { | |
7804 | if (DECL_INITIAL (label)) | |
7805 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
7806 | else | |
7807 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
7808 | } | |
7809 | } | |
ff6b6641 | 7810 | |
1f1d5130 MS |
7811 | #ifndef TARGET_HAS_TARGETCM |
7812 | struct gcc_targetcm targetcm = TARGETCM_INITIALIZER; | |
7813 | #endif | |
7814 | ||
2e9cb75e MLI |
7815 | /* Warn for division by zero according to the value of DIVISOR. */ |
7816 | ||
7817 | void | |
7818 | warn_for_div_by_zero (tree divisor) | |
7819 | { | |
ab22c1fa CF |
7820 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
7821 | about division by zero. Do not issue a warning if DIVISOR has a | |
2e9cb75e MLI |
7822 | floating-point type, since we consider 0.0/0.0 a valid way of |
7823 | generating a NaN. */ | |
ab22c1fa CF |
7824 | if (skip_evaluation == 0 |
7825 | && (integer_zerop (divisor) || fixed_zerop (divisor))) | |
2e9cb75e MLI |
7826 | warning (OPT_Wdiv_by_zero, "division by zero"); |
7827 | } | |
7828 | ||
e2500fed | 7829 | #include "gt-c-common.h" |