]>
Commit | Line | Data |
---|---|---|
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" |
726a989a | 51 | #include "gimple.h" |
ab22c1fa | 52 | #include "fixed-value.h" |
cb60f38d | 53 | |
81a75f0f | 54 | cpp_reader *parse_in; /* Declared in c-pragma.h. */ |
c8724862 | 55 | |
eaa7c03f JM |
56 | /* We let tm.h override the types used here, to handle trivial differences |
57 | such as the choice of unsigned int or long unsigned int for size_t. | |
58 | When machines start needing nontrivial differences in the size type, | |
59 | it would be best to do something here to figure out automatically | |
60 | from other information what type to use. */ | |
61 | ||
62 | #ifndef SIZE_TYPE | |
63 | #define SIZE_TYPE "long unsigned int" | |
64 | #endif | |
65 | ||
d1c38823 ZD |
66 | #ifndef PID_TYPE |
67 | #define PID_TYPE "int" | |
68 | #endif | |
69 | ||
b6baa67d KVH |
70 | #ifndef CHAR16_TYPE |
71 | #define CHAR16_TYPE "short unsigned int" | |
72 | #endif | |
73 | ||
74 | #ifndef CHAR32_TYPE | |
75 | #define CHAR32_TYPE "unsigned int" | |
76 | #endif | |
77 | ||
eaa7c03f JM |
78 | #ifndef WCHAR_TYPE |
79 | #define WCHAR_TYPE "int" | |
80 | #endif | |
81 | ||
a11eba95 ZW |
82 | /* WCHAR_TYPE gets overridden by -fshort-wchar. */ |
83 | #define MODIFIED_WCHAR_TYPE \ | |
84 | (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE) | |
85 | ||
0884b60c BS |
86 | #ifndef PTRDIFF_TYPE |
87 | #define PTRDIFF_TYPE "long int" | |
88 | #endif | |
89 | ||
5fd8e536 JM |
90 | #ifndef WINT_TYPE |
91 | #define WINT_TYPE "unsigned int" | |
92 | #endif | |
93 | ||
94 | #ifndef INTMAX_TYPE | |
95 | #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
96 | ? "int" \ | |
97 | : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
98 | ? "long int" \ | |
99 | : "long long int")) | |
100 | #endif | |
101 | ||
102 | #ifndef UINTMAX_TYPE | |
103 | #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
104 | ? "unsigned int" \ | |
105 | : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ | |
106 | ? "long unsigned int" \ | |
107 | : "long long unsigned int")) | |
108 | #endif | |
109 | ||
7f4edbcb | 110 | /* The following symbols are subsumed in the c_global_trees array, and |
d125d268 | 111 | listed here individually for documentation purposes. |
7f4edbcb BS |
112 | |
113 | INTEGER_TYPE and REAL_TYPE nodes for the standard data types. | |
114 | ||
115 | tree short_integer_type_node; | |
116 | tree long_integer_type_node; | |
117 | tree long_long_integer_type_node; | |
118 | ||
119 | tree short_unsigned_type_node; | |
120 | tree long_unsigned_type_node; | |
121 | tree long_long_unsigned_type_node; | |
122 | ||
de7df9eb JM |
123 | tree truthvalue_type_node; |
124 | tree truthvalue_false_node; | |
125 | tree truthvalue_true_node; | |
7f4edbcb BS |
126 | |
127 | tree ptrdiff_type_node; | |
128 | ||
129 | tree unsigned_char_type_node; | |
130 | tree signed_char_type_node; | |
131 | tree wchar_type_node; | |
132 | tree signed_wchar_type_node; | |
133 | tree unsigned_wchar_type_node; | |
134 | ||
b6baa67d KVH |
135 | tree char16_type_node; |
136 | tree char32_type_node; | |
137 | ||
7f4edbcb BS |
138 | tree float_type_node; |
139 | tree double_type_node; | |
140 | tree long_double_type_node; | |
141 | ||
142 | tree complex_integer_type_node; | |
143 | tree complex_float_type_node; | |
144 | tree complex_double_type_node; | |
145 | tree complex_long_double_type_node; | |
146 | ||
9a8ce21f JG |
147 | tree dfloat32_type_node; |
148 | tree dfloat64_type_node; | |
149 | tree_dfloat128_type_node; | |
150 | ||
7f4edbcb BS |
151 | tree intQI_type_node; |
152 | tree intHI_type_node; | |
153 | tree intSI_type_node; | |
154 | tree intDI_type_node; | |
155 | tree intTI_type_node; | |
156 | ||
157 | tree unsigned_intQI_type_node; | |
158 | tree unsigned_intHI_type_node; | |
159 | tree unsigned_intSI_type_node; | |
160 | tree unsigned_intDI_type_node; | |
161 | tree unsigned_intTI_type_node; | |
162 | ||
163 | tree widest_integer_literal_type_node; | |
164 | tree widest_unsigned_literal_type_node; | |
165 | ||
166 | Nodes for types `void *' and `const void *'. | |
167 | ||
168 | tree ptr_type_node, const_ptr_type_node; | |
169 | ||
170 | Nodes for types `char *' and `const char *'. | |
171 | ||
172 | tree string_type_node, const_string_type_node; | |
173 | ||
174 | Type `char[SOMENUMBER]'. | |
175 | Used when an array of char is needed and the size is irrelevant. | |
176 | ||
177 | tree char_array_type_node; | |
178 | ||
179 | Type `int[SOMENUMBER]' or something like it. | |
180 | Used when an array of int needed and the size is irrelevant. | |
181 | ||
182 | tree int_array_type_node; | |
183 | ||
184 | Type `wchar_t[SOMENUMBER]' or something like it. | |
185 | Used when a wide string literal is created. | |
186 | ||
187 | tree wchar_array_type_node; | |
188 | ||
b6baa67d KVH |
189 | Type `char16_t[SOMENUMBER]' or something like it. |
190 | Used when a UTF-16 string literal is created. | |
191 | ||
192 | tree char16_array_type_node; | |
193 | ||
194 | Type `char32_t[SOMENUMBER]' or something like it. | |
195 | Used when a UTF-32 string literal is created. | |
196 | ||
197 | tree char32_array_type_node; | |
198 | ||
7f4edbcb BS |
199 | Type `int ()' -- used for implicit declaration of functions. |
200 | ||
201 | tree default_function_type; | |
202 | ||
7f4edbcb BS |
203 | A VOID_TYPE node, packaged in a TREE_LIST. |
204 | ||
205 | tree void_list_node; | |
206 | ||
684d9f3b | 207 | The lazily created VAR_DECLs for __FUNCTION__, __PRETTY_FUNCTION__, |
0ba8a114 NS |
208 | and __func__. (C doesn't generate __FUNCTION__ and__PRETTY_FUNCTION__ |
209 | VAR_DECLS, but C++ does.) | |
63ad61ed | 210 | |
0ba8a114 | 211 | tree function_name_decl_node; |
684d9f3b | 212 | tree pretty_function_name_decl_node; |
0ba8a114 NS |
213 | tree c99_function_name_decl_node; |
214 | ||
215 | Stack of nested function name VAR_DECLs. | |
35b1a6fa | 216 | |
0ba8a114 | 217 | tree saved_function_name_decls; |
63ad61ed | 218 | |
7f4edbcb BS |
219 | */ |
220 | ||
221 | tree c_global_trees[CTI_MAX]; | |
17211ab5 | 222 | \f |
4078b403 NB |
223 | /* Switches common to the C front ends. */ |
224 | ||
fa10beec | 225 | /* Nonzero if preprocessing only. */ |
63973df3 | 226 | |
aaf93206 NB |
227 | int flag_preprocess_only; |
228 | ||
63973df3 NB |
229 | /* Nonzero means don't output line number information. */ |
230 | ||
231 | char flag_no_line_commands; | |
232 | ||
233 | /* Nonzero causes -E output not to be done, but directives such as | |
234 | #define that have side effects are still obeyed. */ | |
235 | ||
236 | char flag_no_output; | |
237 | ||
238 | /* Nonzero means dump macros in some fashion. */ | |
239 | ||
240 | char flag_dump_macros; | |
241 | ||
242 | /* Nonzero means pass #include lines through to the output. */ | |
243 | ||
244 | char flag_dump_includes; | |
245 | ||
c0d578e6 GK |
246 | /* Nonzero means process PCH files while preprocessing. */ |
247 | ||
248 | bool flag_pch_preprocess; | |
249 | ||
17211ab5 GK |
250 | /* The file name to which we should write a precompiled header, or |
251 | NULL if no header will be written in this compile. */ | |
252 | ||
253 | const char *pch_file; | |
254 | ||
3df89291 NB |
255 | /* Nonzero if an ISO standard was selected. It rejects macros in the |
256 | user's namespace. */ | |
257 | int flag_iso; | |
258 | ||
259 | /* Nonzero if -undef was given. It suppresses target built-in macros | |
260 | and assertions. */ | |
261 | int flag_undef; | |
262 | ||
6bcedb4e MM |
263 | /* Nonzero means don't recognize the non-ANSI builtin functions. */ |
264 | ||
265 | int flag_no_builtin; | |
266 | ||
267 | /* Nonzero means don't recognize the non-ANSI builtin functions. | |
268 | -ansi sets this. */ | |
269 | ||
270 | int flag_no_nonansi_builtin; | |
271 | ||
eaa7c03f JM |
272 | /* Nonzero means give `double' the same size as `float'. */ |
273 | ||
274 | int flag_short_double; | |
275 | ||
276 | /* Nonzero means give `wchar_t' the same size as `short'. */ | |
277 | ||
278 | int flag_short_wchar; | |
279 | ||
00c8e9f6 MS |
280 | /* Nonzero means allow implicit conversions between vectors with |
281 | differing numbers of subparts and/or differing element types. */ | |
282 | int flag_lax_vector_conversions; | |
283 | ||
750491fc RH |
284 | /* Nonzero means allow Microsoft extensions without warnings or errors. */ |
285 | int flag_ms_extensions; | |
286 | ||
4078b403 NB |
287 | /* Nonzero means don't recognize the keyword `asm'. */ |
288 | ||
289 | int flag_no_asm; | |
290 | ||
4078b403 NB |
291 | /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */ |
292 | ||
293 | int flag_signed_bitfields = 1; | |
4078b403 | 294 | |
35b1a6fa | 295 | /* Warn about #pragma directives that are not recognized. */ |
4078b403 | 296 | |
35b1a6fa | 297 | int warn_unknown_pragmas; /* Tri state variable. */ |
4078b403 | 298 | |
4078b403 NB |
299 | /* Warn about format/argument anomalies in calls to formatted I/O functions |
300 | (*printf, *scanf, strftime, strfmon, etc.). */ | |
301 | ||
302 | int warn_format; | |
303 | ||
b2f97e4a MM |
304 | /* Warn about using __null (as NULL in C++) as sentinel. For code compiled |
305 | with GCC this doesn't matter as __null is guaranteed to have the right | |
306 | size. */ | |
307 | ||
308 | int warn_strict_null_sentinel; | |
309 | ||
264fa2db ZL |
310 | /* Zero means that faster, ...NonNil variants of objc_msgSend... |
311 | calls will be used in ObjC; passing nil receivers to such calls | |
312 | will most likely result in crashes. */ | |
313 | int flag_nil_receivers = 1; | |
314 | ||
264fa2db ZL |
315 | /* Nonzero means that code generation will be altered to support |
316 | "zero-link" execution. This currently affects ObjC only, but may | |
317 | affect other languages in the future. */ | |
318 | int flag_zero_link = 0; | |
319 | ||
320 | /* Nonzero means emit an '__OBJC, __image_info' for the current translation | |
321 | unit. It will inform the ObjC runtime that class definition(s) herein | |
322 | contained are to replace one(s) previously loaded. */ | |
323 | int flag_replace_objc_classes = 0; | |
9f63daea | 324 | |
4078b403 NB |
325 | /* C/ObjC language option variables. */ |
326 | ||
327 | ||
4078b403 NB |
328 | /* Nonzero means allow type mismatches in conditional expressions; |
329 | just make their values `void'. */ | |
330 | ||
331 | int flag_cond_mismatch; | |
332 | ||
333 | /* Nonzero means enable C89 Amendment 1 features. */ | |
334 | ||
335 | int flag_isoc94; | |
336 | ||
337 | /* Nonzero means use the ISO C99 dialect of C. */ | |
338 | ||
339 | int flag_isoc99; | |
340 | ||
6614fd40 | 341 | /* Nonzero means that we have builtin functions, and main is an int. */ |
4078b403 NB |
342 | |
343 | int flag_hosted = 1; | |
344 | ||
4078b403 NB |
345 | |
346 | /* ObjC language option variables. */ | |
347 | ||
348 | ||
349 | /* Open and close the file for outputting class declarations, if | |
350 | requested (ObjC). */ | |
351 | ||
352 | int flag_gen_declaration; | |
353 | ||
4078b403 NB |
354 | /* Tells the compiler that this is a special run. Do not perform any |
355 | compiling, instead we are to test some platform dependent features | |
356 | and output a C header file with appropriate definitions. */ | |
357 | ||
358 | int print_struct_values; | |
359 | ||
fa10beec | 360 | /* Tells the compiler what is the constant string class for ObjC. */ |
4078b403 NB |
361 | |
362 | const char *constant_string_class_name; | |
363 | ||
4078b403 NB |
364 | |
365 | /* C++ language option variables. */ | |
366 | ||
367 | ||
368 | /* Nonzero means don't recognize any extension keywords. */ | |
369 | ||
370 | int flag_no_gnu_keywords; | |
371 | ||
372 | /* Nonzero means do emit exported implementations of functions even if | |
373 | they can be inlined. */ | |
374 | ||
375 | int flag_implement_inlines = 1; | |
376 | ||
4078b403 NB |
377 | /* Nonzero means that implicit instantiations will be emitted if needed. */ |
378 | ||
379 | int flag_implicit_templates = 1; | |
380 | ||
381 | /* Nonzero means that implicit instantiations of inline templates will be | |
382 | emitted if needed, even if instantiations of non-inline templates | |
383 | aren't. */ | |
384 | ||
385 | int flag_implicit_inline_templates = 1; | |
386 | ||
387 | /* Nonzero means generate separate instantiation control files and | |
388 | juggle them at link time. */ | |
389 | ||
390 | int flag_use_repository; | |
391 | ||
392 | /* Nonzero if we want to issue diagnostics that the standard says are not | |
393 | required. */ | |
394 | ||
395 | int flag_optional_diags = 1; | |
396 | ||
397 | /* Nonzero means we should attempt to elide constructors when possible. */ | |
398 | ||
399 | int flag_elide_constructors = 1; | |
400 | ||
401 | /* Nonzero means that member functions defined in class scope are | |
402 | inline by default. */ | |
403 | ||
404 | int flag_default_inline = 1; | |
405 | ||
406 | /* Controls whether compiler generates 'type descriptor' that give | |
407 | run-time type information. */ | |
408 | ||
409 | int flag_rtti = 1; | |
410 | ||
411 | /* Nonzero if we want to conserve space in the .o files. We do this | |
412 | by putting uninitialized data and runtime initialized data into | |
413 | .common instead of .data at the expense of not flagging multiple | |
414 | definitions. */ | |
415 | ||
416 | int flag_conserve_space; | |
417 | ||
418 | /* Nonzero if we want to obey access control semantics. */ | |
419 | ||
420 | int flag_access_control = 1; | |
421 | ||
422 | /* Nonzero if we want to check the return value of new and avoid calling | |
423 | constructors if it is a null pointer. */ | |
424 | ||
425 | int flag_check_new; | |
426 | ||
c1ae8be5 | 427 | /* The C++ dialect being used. C++98 is the default. */ |
966541e3 | 428 | |
c1ae8be5 | 429 | enum cxx_dialect cxx_dialect = cxx98; |
966541e3 | 430 | |
4078b403 NB |
431 | /* Nonzero if we want the new ISO rules for pushing a new scope for `for' |
432 | initialization variables. | |
433 | 0: Old rules, set by -fno-for-scope. | |
434 | 2: New ISO rules, set by -ffor-scope. | |
435 | 1: Try to implement new ISO rules, but with backup compatibility | |
436 | (and warnings). This is the default, for now. */ | |
437 | ||
438 | int flag_new_for_scope = 1; | |
439 | ||
440 | /* Nonzero if we want to emit defined symbols with common-like linkage as | |
441 | weak symbols where possible, in order to conform to C++ semantics. | |
442 | Otherwise, emit them as local symbols. */ | |
443 | ||
444 | int flag_weak = 1; | |
445 | ||
b20d9f0c AO |
446 | /* 0 means we want the preprocessor to not emit line directives for |
447 | the current working directory. 1 means we want it to do it. -1 | |
448 | means we should decide depending on whether debugging information | |
449 | is being emitted or not. */ | |
450 | ||
451 | int flag_working_directory = -1; | |
452 | ||
4078b403 | 453 | /* Nonzero to use __cxa_atexit, rather than atexit, to register |
c7b5e395 GK |
454 | destructors for local statics and global objects. '2' means it has been |
455 | set nonzero as a default, not by a command-line flag. */ | |
4078b403 NB |
456 | |
457 | int flag_use_cxa_atexit = DEFAULT_USE_CXA_ATEXIT; | |
458 | ||
c7b5e395 GK |
459 | /* Nonzero to use __cxa_get_exception_ptr in C++ exception-handling |
460 | code. '2' means it has not been set explicitly on the command line. */ | |
461 | ||
462 | int flag_use_cxa_get_exception_ptr = 2; | |
463 | ||
4078b403 NB |
464 | /* Nonzero means to implement standard semantics for exception |
465 | specifications, calling unexpected if an exception is thrown that | |
466 | doesn't match the specification. Zero means to treat them as | |
467 | assertions and optimize accordingly, but not check them. */ | |
468 | ||
469 | int flag_enforce_eh_specs = 1; | |
470 | ||
40aac948 JM |
471 | /* Nonzero means to generate thread-safe code for initializing local |
472 | statics. */ | |
473 | ||
474 | int flag_threadsafe_statics = 1; | |
475 | ||
4078b403 NB |
476 | /* Nonzero means warn about implicit declarations. */ |
477 | ||
478 | int warn_implicit = 1; | |
479 | ||
4078b403 NB |
480 | /* Maximum template instantiation depth. This limit is rather |
481 | arbitrary, but it exists to limit the time it takes to notice | |
482 | infinite template instantiations. */ | |
483 | ||
484 | int max_tinst_depth = 500; | |
485 | ||
486 | ||
487 | ||
f09f1de5 MM |
488 | /* The elements of `ridpointers' are identifier nodes for the reserved |
489 | type names and storage classes. It is indexed by a RID_... value. */ | |
490 | tree *ridpointers; | |
491 | ||
35b1a6fa | 492 | tree (*make_fname_decl) (tree, int); |
2ce07e2d | 493 | |
e78a3b42 RK |
494 | /* Nonzero means the expression being parsed will never be evaluated. |
495 | This is a count, since unevaluated expressions can nest. */ | |
496 | int skip_evaluation; | |
497 | ||
ec5c56db | 498 | /* Information about how a function name is generated. */ |
0ba8a114 NS |
499 | struct fname_var_t |
500 | { | |
8b60264b KG |
501 | tree *const decl; /* pointer to the VAR_DECL. */ |
502 | const unsigned rid; /* RID number for the identifier. */ | |
503 | const int pretty; /* How pretty is it? */ | |
0ba8a114 NS |
504 | }; |
505 | ||
ec5c56db | 506 | /* The three ways of getting then name of the current function. */ |
0ba8a114 NS |
507 | |
508 | const struct fname_var_t fname_vars[] = | |
509 | { | |
ec5c56db | 510 | /* C99 compliant __func__, must be first. */ |
0ba8a114 | 511 | {&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0}, |
ec5c56db | 512 | /* GCC __FUNCTION__ compliant. */ |
0ba8a114 | 513 | {&function_name_decl_node, RID_FUNCTION_NAME, 0}, |
ec5c56db | 514 | /* GCC __PRETTY_FUNCTION__ compliant. */ |
0ba8a114 NS |
515 | {&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1}, |
516 | {NULL, 0, 0}, | |
517 | }; | |
518 | ||
a6c0a76c SB |
519 | static tree check_case_value (tree); |
520 | static bool check_case_bounds (tree, tree, tree *, tree *); | |
4724b3de | 521 | |
35b1a6fa AJ |
522 | static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
523 | static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); | |
524 | static tree handle_common_attribute (tree *, tree, tree, int, bool *); | |
525 | static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); | |
52bf96d2 JH |
526 | static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
527 | static tree handle_cold_attribute (tree *, tree, tree, int, bool *); | |
35b1a6fa AJ |
528 | static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
529 | static tree handle_always_inline_attribute (tree *, tree, tree, int, | |
530 | bool *); | |
d752cfdb JJ |
531 | static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
532 | static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); | |
0691d1d4 | 533 | static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
d2af6a68 | 534 | static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
535 | static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
536 | static tree handle_unused_attribute (tree *, tree, tree, int, bool *); | |
ce91e74c JH |
537 | static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
538 | bool *); | |
35b1a6fa AJ |
539 | static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
540 | static tree handle_transparent_union_attribute (tree *, tree, tree, | |
541 | int, bool *); | |
542 | static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); | |
543 | static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); | |
544 | static tree handle_mode_attribute (tree *, tree, tree, int, bool *); | |
545 | static tree handle_section_attribute (tree *, tree, tree, int, bool *); | |
546 | static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); | |
547 | static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; | |
548 | static tree handle_alias_attribute (tree *, tree, tree, int, bool *); | |
a0203ca7 | 549 | static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
35b1a6fa AJ |
550 | static tree handle_visibility_attribute (tree *, tree, tree, int, |
551 | bool *); | |
552 | static tree handle_tls_model_attribute (tree *, tree, tree, int, | |
553 | bool *); | |
554 | static tree handle_no_instrument_function_attribute (tree *, tree, | |
555 | tree, int, bool *); | |
556 | static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); | |
6e9a3221 | 557 | static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
558 | static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
559 | bool *); | |
560 | static tree handle_pure_attribute (tree *, tree, tree, int, bool *); | |
dcd6de6d | 561 | static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
35b1a6fa AJ |
562 | static tree handle_deprecated_attribute (tree *, tree, tree, int, |
563 | bool *); | |
564 | static tree handle_vector_size_attribute (tree *, tree, tree, int, | |
565 | bool *); | |
566 | static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); | |
567 | static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); | |
568 | static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); | |
72954a4f JM |
569 | static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
570 | bool *); | |
3d091dac | 571 | static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
b5d32c25 | 572 | static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
51bc54a6 | 573 | static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
ab442df7 MM |
574 | static tree handle_option_attribute (tree *, tree, tree, int, bool *); |
575 | static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); | |
35b1a6fa | 576 | |
94a0dd7b | 577 | static void check_function_nonnull (tree, int, tree *); |
35b1a6fa AJ |
578 | static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); |
579 | static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT); | |
580 | static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); | |
d07605f5 | 581 | static int resort_field_decl_cmp (const void *, const void *); |
b34c7881 | 582 | |
eea1139b ILT |
583 | /* Reserved words. The third field is a mask: keywords are disabled |
584 | if they match the mask. | |
585 | ||
586 | Masks for languages: | |
587 | C --std=c89: D_C99 | D_CXXONLY | D_OBJC | D_CXX_OBJC | |
588 | C --std=c99: D_CXXONLY | D_OBJC | |
589 | ObjC is like C except that D_OBJC and D_CXX_OBJC are not set | |
590 | C++ --std=c98: D_CONLY | D_CXXOX | D_OBJC | |
591 | C++ --std=c0x: D_CONLY | D_OBJC | |
592 | ObjC++ is like C++ except that D_OBJC is not set | |
593 | ||
594 | If -fno-asm is used, D_ASM is added to the mask. If | |
595 | -fno-gnu-keywords is used, D_EXT is added. If -fno-asm and C in | |
596 | C89 mode, D_EXT89 is added for both -fno-asm and -fno-gnu-keywords. | |
2696a995 | 597 | In C with -Wc++-compat, we warn if D_CXXWARN is set. */ |
eea1139b ILT |
598 | |
599 | const struct c_common_resword c_common_reswords[] = | |
600 | { | |
601 | { "_Bool", RID_BOOL, D_CONLY }, | |
602 | { "_Complex", RID_COMPLEX, 0 }, | |
603 | { "_Decimal32", RID_DFLOAT32, D_CONLY | D_EXT }, | |
604 | { "_Decimal64", RID_DFLOAT64, D_CONLY | D_EXT }, | |
605 | { "_Decimal128", RID_DFLOAT128, D_CONLY | D_EXT }, | |
606 | { "_Fract", RID_FRACT, D_CONLY | D_EXT }, | |
607 | { "_Accum", RID_ACCUM, D_CONLY | D_EXT }, | |
608 | { "_Sat", RID_SAT, D_CONLY | D_EXT }, | |
609 | { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, | |
610 | { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, | |
611 | { "__alignof", RID_ALIGNOF, 0 }, | |
612 | { "__alignof__", RID_ALIGNOF, 0 }, | |
613 | { "__asm", RID_ASM, 0 }, | |
614 | { "__asm__", RID_ASM, 0 }, | |
615 | { "__attribute", RID_ATTRIBUTE, 0 }, | |
616 | { "__attribute__", RID_ATTRIBUTE, 0 }, | |
617 | { "__builtin_choose_expr", RID_CHOOSE_EXPR, D_CONLY }, | |
618 | { "__builtin_offsetof", RID_OFFSETOF, 0 }, | |
619 | { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, D_CONLY }, | |
620 | { "__builtin_va_arg", RID_VA_ARG, 0 }, | |
621 | { "__complex", RID_COMPLEX, 0 }, | |
622 | { "__complex__", RID_COMPLEX, 0 }, | |
623 | { "__const", RID_CONST, 0 }, | |
624 | { "__const__", RID_CONST, 0 }, | |
625 | { "__decltype", RID_DECLTYPE, D_CXXONLY }, | |
626 | { "__extension__", RID_EXTENSION, 0 }, | |
627 | { "__func__", RID_C99_FUNCTION_NAME, 0 }, | |
628 | { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY }, | |
629 | { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY }, | |
630 | { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY }, | |
631 | { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY }, | |
632 | { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, D_CXXONLY }, | |
633 | { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, D_CXXONLY }, | |
634 | { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, D_CXXONLY }, | |
635 | { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, D_CXXONLY }, | |
636 | { "__is_abstract", RID_IS_ABSTRACT, D_CXXONLY }, | |
637 | { "__is_base_of", RID_IS_BASE_OF, D_CXXONLY }, | |
638 | { "__is_class", RID_IS_CLASS, D_CXXONLY }, | |
639 | { "__is_convertible_to", RID_IS_CONVERTIBLE_TO, D_CXXONLY }, | |
640 | { "__is_empty", RID_IS_EMPTY, D_CXXONLY }, | |
641 | { "__is_enum", RID_IS_ENUM, D_CXXONLY }, | |
642 | { "__is_pod", RID_IS_POD, D_CXXONLY }, | |
643 | { "__is_polymorphic", RID_IS_POLYMORPHIC, D_CXXONLY }, | |
644 | { "__is_union", RID_IS_UNION, D_CXXONLY }, | |
645 | { "__imag", RID_IMAGPART, 0 }, | |
646 | { "__imag__", RID_IMAGPART, 0 }, | |
647 | { "__inline", RID_INLINE, 0 }, | |
648 | { "__inline__", RID_INLINE, 0 }, | |
649 | { "__label__", RID_LABEL, 0 }, | |
650 | { "__null", RID_NULL, 0 }, | |
651 | { "__real", RID_REALPART, 0 }, | |
652 | { "__real__", RID_REALPART, 0 }, | |
653 | { "__restrict", RID_RESTRICT, 0 }, | |
654 | { "__restrict__", RID_RESTRICT, 0 }, | |
655 | { "__signed", RID_SIGNED, 0 }, | |
656 | { "__signed__", RID_SIGNED, 0 }, | |
657 | { "__thread", RID_THREAD, 0 }, | |
658 | { "__typeof", RID_TYPEOF, 0 }, | |
659 | { "__typeof__", RID_TYPEOF, 0 }, | |
660 | { "__volatile", RID_VOLATILE, 0 }, | |
661 | { "__volatile__", RID_VOLATILE, 0 }, | |
662 | { "asm", RID_ASM, D_ASM }, | |
663 | { "auto", RID_AUTO, 0 }, | |
03c3034e | 664 | { "bool", RID_BOOL, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
665 | { "break", RID_BREAK, 0 }, |
666 | { "case", RID_CASE, 0 }, | |
2696a995 | 667 | { "catch", RID_CATCH, D_CXX_OBJC | D_CXXWARN }, |
eea1139b | 668 | { "char", RID_CHAR, 0 }, |
2696a995 KG |
669 | { "char16_t", RID_CHAR16, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
670 | { "char32_t", RID_CHAR32, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
671 | { "class", RID_CLASS, D_CXX_OBJC | D_CXXWARN }, | |
eea1139b ILT |
672 | { "const", RID_CONST, 0 }, |
673 | { "const_cast", RID_CONSTCAST, D_CXXONLY | D_CXXWARN }, | |
674 | { "continue", RID_CONTINUE, 0 }, | |
2696a995 | 675 | { "decltype", RID_DECLTYPE, D_CXXONLY | D_CXX0X | D_CXXWARN }, |
eea1139b | 676 | { "default", RID_DEFAULT, 0 }, |
2696a995 | 677 | { "delete", RID_DELETE, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
678 | { "do", RID_DO, 0 }, |
679 | { "double", RID_DOUBLE, 0 }, | |
680 | { "dynamic_cast", RID_DYNCAST, D_CXXONLY | D_CXXWARN }, | |
681 | { "else", RID_ELSE, 0 }, | |
682 | { "enum", RID_ENUM, 0 }, | |
2696a995 KG |
683 | { "explicit", RID_EXPLICIT, D_CXXONLY | D_CXXWARN }, |
684 | { "export", RID_EXPORT, D_CXXONLY | D_CXXWARN }, | |
eea1139b | 685 | { "extern", RID_EXTERN, 0 }, |
2696a995 | 686 | { "false", RID_FALSE, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
687 | { "float", RID_FLOAT, 0 }, |
688 | { "for", RID_FOR, 0 }, | |
2696a995 | 689 | { "friend", RID_FRIEND, D_CXXONLY | D_CXXWARN }, |
eea1139b ILT |
690 | { "goto", RID_GOTO, 0 }, |
691 | { "if", RID_IF, 0 }, | |
692 | { "inline", RID_INLINE, D_EXT89 }, | |
693 | { "int", RID_INT, 0 }, | |
694 | { "long", RID_LONG, 0 }, | |
695 | { "mutable", RID_MUTABLE, D_CXXONLY | D_CXXWARN }, | |
2696a995 KG |
696 | { "namespace", RID_NAMESPACE, D_CXXONLY | D_CXXWARN }, |
697 | { "new", RID_NEW, D_CXXONLY | D_CXXWARN }, | |
698 | { "operator", RID_OPERATOR, D_CXXONLY | D_CXXWARN }, | |
699 | { "private", RID_PRIVATE, D_CXX_OBJC | D_CXXWARN }, | |
700 | { "protected", RID_PROTECTED, D_CXX_OBJC | D_CXXWARN }, | |
701 | { "public", RID_PUBLIC, D_CXX_OBJC | D_CXXWARN }, | |
eea1139b ILT |
702 | { "register", RID_REGISTER, 0 }, |
703 | { "reinterpret_cast", RID_REINTCAST, D_CXXONLY | D_CXXWARN }, | |
704 | { "restrict", RID_RESTRICT, D_CONLY | D_C99 }, | |
705 | { "return", RID_RETURN, 0 }, | |
706 | { "short", RID_SHORT, 0 }, | |
707 | { "signed", RID_SIGNED, 0 }, | |
708 | { "sizeof", RID_SIZEOF, 0 }, | |
709 | { "static", RID_STATIC, 0 }, | |
710 | { "static_assert", RID_STATIC_ASSERT, D_CXXONLY | D_CXX0X | D_CXXWARN }, | |
711 | { "static_cast", RID_STATCAST, D_CXXONLY | D_CXXWARN }, | |
712 | { "struct", RID_STRUCT, 0 }, | |
713 | { "switch", RID_SWITCH, 0 }, | |
2696a995 KG |
714 | { "template", RID_TEMPLATE, D_CXXONLY | D_CXXWARN }, |
715 | { "this", RID_THIS, D_CXXONLY | D_CXXWARN }, | |
716 | { "throw", RID_THROW, D_CXX_OBJC | D_CXXWARN }, | |
717 | { "true", RID_TRUE, D_CXXONLY | D_CXXWARN }, | |
718 | { "try", RID_TRY, D_CXX_OBJC | D_CXXWARN }, | |
eea1139b | 719 | { "typedef", RID_TYPEDEF, 0 }, |
2696a995 KG |
720 | { "typename", RID_TYPENAME, D_CXXONLY | D_CXXWARN }, |
721 | { "typeid", RID_TYPEID, D_CXXONLY | D_CXXWARN }, | |
eea1139b ILT |
722 | { "typeof", RID_TYPEOF, D_ASM | D_EXT }, |
723 | { "union", RID_UNION, 0 }, | |
724 | { "unsigned", RID_UNSIGNED, 0 }, | |
2696a995 KG |
725 | { "using", RID_USING, D_CXXONLY | D_CXXWARN }, |
726 | { "virtual", RID_VIRTUAL, D_CXXONLY | D_CXXWARN }, | |
eea1139b ILT |
727 | { "void", RID_VOID, 0 }, |
728 | { "volatile", RID_VOLATILE, 0 }, | |
729 | { "wchar_t", RID_WCHAR, D_CXXONLY }, | |
730 | { "while", RID_WHILE, 0 }, | |
731 | /* These Objective-C keywords are recognized only immediately after | |
732 | an '@'. */ | |
733 | { "compatibility_alias", RID_AT_ALIAS, D_OBJC }, | |
734 | { "defs", RID_AT_DEFS, D_OBJC }, | |
735 | { "encode", RID_AT_ENCODE, D_OBJC }, | |
736 | { "end", RID_AT_END, D_OBJC }, | |
737 | { "implementation", RID_AT_IMPLEMENTATION, D_OBJC }, | |
738 | { "interface", RID_AT_INTERFACE, D_OBJC }, | |
739 | { "protocol", RID_AT_PROTOCOL, D_OBJC }, | |
740 | { "selector", RID_AT_SELECTOR, D_OBJC }, | |
741 | { "finally", RID_AT_FINALLY, D_OBJC }, | |
742 | { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC }, | |
743 | /* These are recognized only in protocol-qualifier context | |
744 | (see above) */ | |
745 | { "bycopy", RID_BYCOPY, D_OBJC }, | |
746 | { "byref", RID_BYREF, D_OBJC }, | |
747 | { "in", RID_IN, D_OBJC }, | |
748 | { "inout", RID_INOUT, D_OBJC }, | |
749 | { "oneway", RID_ONEWAY, D_OBJC }, | |
750 | { "out", RID_OUT, D_OBJC }, | |
751 | }; | |
752 | ||
753 | const unsigned int num_c_common_reswords = | |
754 | sizeof c_common_reswords / sizeof (struct c_common_resword); | |
755 | ||
349ae713 NB |
756 | /* Table of machine-independent attributes common to all C-like languages. */ |
757 | const struct attribute_spec c_common_attribute_table[] = | |
758 | { | |
759 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ | |
760 | { "packed", 0, 0, false, false, false, | |
35b1a6fa | 761 | handle_packed_attribute }, |
349ae713 NB |
762 | { "nocommon", 0, 0, true, false, false, |
763 | handle_nocommon_attribute }, | |
764 | { "common", 0, 0, true, false, false, | |
765 | handle_common_attribute }, | |
766 | /* FIXME: logically, noreturn attributes should be listed as | |
767 | "false, true, true" and apply to function types. But implementing this | |
768 | would require all the places in the compiler that use TREE_THIS_VOLATILE | |
769 | on a decl to identify non-returning functions to be located and fixed | |
770 | to check the function type instead. */ | |
771 | { "noreturn", 0, 0, true, false, false, | |
772 | handle_noreturn_attribute }, | |
773 | { "volatile", 0, 0, true, false, false, | |
774 | handle_noreturn_attribute }, | |
775 | { "noinline", 0, 0, true, false, false, | |
776 | handle_noinline_attribute }, | |
777 | { "always_inline", 0, 0, true, false, false, | |
778 | handle_always_inline_attribute }, | |
4eb7fd83 JJ |
779 | { "gnu_inline", 0, 0, true, false, false, |
780 | handle_gnu_inline_attribute }, | |
d752cfdb JJ |
781 | { "artificial", 0, 0, true, false, false, |
782 | handle_artificial_attribute }, | |
0691d1d4 | 783 | { "flatten", 0, 0, true, false, false, |
c22cacf3 | 784 | handle_flatten_attribute }, |
349ae713 NB |
785 | { "used", 0, 0, true, false, false, |
786 | handle_used_attribute }, | |
787 | { "unused", 0, 0, false, false, false, | |
788 | handle_unused_attribute }, | |
ce91e74c JH |
789 | { "externally_visible", 0, 0, true, false, false, |
790 | handle_externally_visible_attribute }, | |
349ae713 NB |
791 | /* The same comments as for noreturn attributes apply to const ones. */ |
792 | { "const", 0, 0, true, false, false, | |
793 | handle_const_attribute }, | |
794 | { "transparent_union", 0, 0, false, false, false, | |
795 | handle_transparent_union_attribute }, | |
fc8600f9 | 796 | { "constructor", 0, 1, true, false, false, |
349ae713 | 797 | handle_constructor_attribute }, |
fc8600f9 | 798 | { "destructor", 0, 1, true, false, false, |
349ae713 NB |
799 | handle_destructor_attribute }, |
800 | { "mode", 1, 1, false, true, false, | |
801 | handle_mode_attribute }, | |
802 | { "section", 1, 1, true, false, false, | |
803 | handle_section_attribute }, | |
804 | { "aligned", 0, 1, false, false, false, | |
805 | handle_aligned_attribute }, | |
806 | { "weak", 0, 0, true, false, false, | |
807 | handle_weak_attribute }, | |
808 | { "alias", 1, 1, true, false, false, | |
809 | handle_alias_attribute }, | |
a0203ca7 AO |
810 | { "weakref", 0, 1, true, false, false, |
811 | handle_weakref_attribute }, | |
349ae713 NB |
812 | { "no_instrument_function", 0, 0, true, false, false, |
813 | handle_no_instrument_function_attribute }, | |
814 | { "malloc", 0, 0, true, false, false, | |
815 | handle_malloc_attribute }, | |
6e9a3221 AN |
816 | { "returns_twice", 0, 0, true, false, false, |
817 | handle_returns_twice_attribute }, | |
349ae713 NB |
818 | { "no_stack_limit", 0, 0, true, false, false, |
819 | handle_no_limit_stack_attribute }, | |
820 | { "pure", 0, 0, true, false, false, | |
821 | handle_pure_attribute }, | |
dcd6de6d ZD |
822 | /* For internal use (marking of builtins) only. The name contains space |
823 | to prevent its usage in source code. */ | |
824 | { "no vops", 0, 0, true, false, false, | |
825 | handle_novops_attribute }, | |
349ae713 NB |
826 | { "deprecated", 0, 0, false, false, false, |
827 | handle_deprecated_attribute }, | |
828 | { "vector_size", 1, 1, false, true, false, | |
829 | handle_vector_size_attribute }, | |
d7afec4b | 830 | { "visibility", 1, 1, false, false, false, |
349ae713 | 831 | handle_visibility_attribute }, |
dce81a1a JJ |
832 | { "tls_model", 1, 1, true, false, false, |
833 | handle_tls_model_attribute }, | |
b34c7881 JT |
834 | { "nonnull", 0, -1, false, true, true, |
835 | handle_nonnull_attribute }, | |
39f2f3c8 RS |
836 | { "nothrow", 0, 0, true, false, false, |
837 | handle_nothrow_attribute }, | |
d18b1ed8 | 838 | { "may_alias", 0, 0, false, true, false, NULL }, |
0bfa5f65 RH |
839 | { "cleanup", 1, 1, true, false, false, |
840 | handle_cleanup_attribute }, | |
72954a4f JM |
841 | { "warn_unused_result", 0, 0, false, true, true, |
842 | handle_warn_unused_result_attribute }, | |
254986c7 | 843 | { "sentinel", 0, 1, false, true, true, |
3d091dac | 844 | handle_sentinel_attribute }, |
b5d32c25 KG |
845 | /* For internal use (marking of builtins) only. The name contains space |
846 | to prevent its usage in source code. */ | |
847 | { "type generic", 0, 0, false, true, true, | |
848 | handle_type_generic_attribute }, | |
51bc54a6 DM |
849 | { "alloc_size", 1, 2, false, true, true, |
850 | handle_alloc_size_attribute }, | |
52bf96d2 JH |
851 | { "cold", 0, 0, true, false, false, |
852 | handle_cold_attribute }, | |
853 | { "hot", 0, 0, true, false, false, | |
854 | handle_hot_attribute }, | |
d2af6a68 JJ |
855 | { "warning", 1, 1, true, false, false, |
856 | handle_error_attribute }, | |
857 | { "error", 1, 1, true, false, false, | |
858 | handle_error_attribute }, | |
ab442df7 MM |
859 | { "option", 1, -1, true, false, false, |
860 | handle_option_attribute }, | |
861 | { "optimize", 1, -1, true, false, false, | |
862 | handle_optimize_attribute }, | |
349ae713 NB |
863 | { NULL, 0, 0, false, false, false, NULL } |
864 | }; | |
865 | ||
866 | /* Give the specifications for the format attributes, used by C and all | |
95bd1dd7 | 867 | descendants. */ |
349ae713 NB |
868 | |
869 | const struct attribute_spec c_common_format_attribute_table[] = | |
870 | { | |
871 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ | |
872 | { "format", 3, 3, false, true, true, | |
873 | handle_format_attribute }, | |
874 | { "format_arg", 1, 1, false, true, true, | |
875 | handle_format_arg_attribute }, | |
876 | { NULL, 0, 0, false, false, false, NULL } | |
877 | }; | |
878 | ||
ec5c56db | 879 | /* Push current bindings for the function name VAR_DECLS. */ |
7da551a2 RS |
880 | |
881 | void | |
35b1a6fa | 882 | start_fname_decls (void) |
7da551a2 | 883 | { |
0ba8a114 NS |
884 | unsigned ix; |
885 | tree saved = NULL_TREE; | |
35b1a6fa | 886 | |
0ba8a114 NS |
887 | for (ix = 0; fname_vars[ix].decl; ix++) |
888 | { | |
889 | tree decl = *fname_vars[ix].decl; | |
7da551a2 | 890 | |
0ba8a114 NS |
891 | if (decl) |
892 | { | |
7d60be94 | 893 | saved = tree_cons (decl, build_int_cst (NULL_TREE, ix), saved); |
0ba8a114 NS |
894 | *fname_vars[ix].decl = NULL_TREE; |
895 | } | |
896 | } | |
897 | if (saved || saved_function_name_decls) | |
898 | /* Normally they'll have been NULL, so only push if we've got a | |
899 | stack, or they are non-NULL. */ | |
900 | saved_function_name_decls = tree_cons (saved, NULL_TREE, | |
901 | saved_function_name_decls); | |
902 | } | |
903 | ||
325c3691 RH |
904 | /* Finish up the current bindings, adding them into the current function's |
905 | statement tree. This must be done _before_ finish_stmt_tree is called. | |
906 | If there is no current function, we must be at file scope and no statements | |
907 | are involved. Pop the previous bindings. */ | |
0ba8a114 NS |
908 | |
909 | void | |
35b1a6fa | 910 | finish_fname_decls (void) |
0ba8a114 NS |
911 | { |
912 | unsigned ix; | |
325c3691 | 913 | tree stmts = NULL_TREE; |
0ba8a114 NS |
914 | tree stack = saved_function_name_decls; |
915 | ||
916 | for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack)) | |
325c3691 | 917 | append_to_statement_list (TREE_VALUE (stack), &stmts); |
35b1a6fa | 918 | |
325c3691 | 919 | if (stmts) |
0ba8a114 | 920 | { |
325c3691 | 921 | tree *bodyp = &DECL_SAVED_TREE (current_function_decl); |
bfaba7a9 | 922 | |
325c3691 RH |
923 | if (TREE_CODE (*bodyp) == BIND_EXPR) |
924 | bodyp = &BIND_EXPR_BODY (*bodyp); | |
6cce57b0 | 925 | |
86ad3aa9 | 926 | append_to_statement_list_force (*bodyp, &stmts); |
325c3691 | 927 | *bodyp = stmts; |
0ba8a114 | 928 | } |
35b1a6fa | 929 | |
0ba8a114 NS |
930 | for (ix = 0; fname_vars[ix].decl; ix++) |
931 | *fname_vars[ix].decl = NULL_TREE; | |
35b1a6fa | 932 | |
0ba8a114 | 933 | if (stack) |
7da551a2 | 934 | { |
ec5c56db | 935 | /* We had saved values, restore them. */ |
0ba8a114 NS |
936 | tree saved; |
937 | ||
938 | for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved)) | |
939 | { | |
940 | tree decl = TREE_PURPOSE (saved); | |
941 | unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved)); | |
35b1a6fa | 942 | |
0ba8a114 NS |
943 | *fname_vars[ix].decl = decl; |
944 | } | |
945 | stack = TREE_CHAIN (stack); | |
7da551a2 | 946 | } |
0ba8a114 NS |
947 | saved_function_name_decls = stack; |
948 | } | |
949 | ||
6cce57b0 | 950 | /* Return the text name of the current function, suitably prettified |
0d0bc036 | 951 | by PRETTY_P. Return string must be freed by caller. */ |
0ba8a114 NS |
952 | |
953 | const char * | |
35b1a6fa | 954 | fname_as_string (int pretty_p) |
0ba8a114 | 955 | { |
47ab33b2 | 956 | const char *name = "top level"; |
0d0bc036 | 957 | char *namep; |
46c2514e TT |
958 | int vrb = 2, len; |
959 | cpp_string cstr = { 0, 0 }, strname; | |
47ab33b2 | 960 | |
3f75a254 | 961 | if (!pretty_p) |
47ab33b2 MA |
962 | { |
963 | name = ""; | |
964 | vrb = 0; | |
965 | } | |
966 | ||
967 | if (current_function_decl) | |
ae2bcd98 | 968 | name = lang_hooks.decl_printable_name (current_function_decl, vrb); |
47ab33b2 | 969 | |
46c2514e | 970 | len = strlen (name) + 3; /* Two for '"'s. One for NULL. */ |
0d0bc036 | 971 | |
46c2514e TT |
972 | namep = XNEWVEC (char, len); |
973 | snprintf (namep, len, "\"%s\"", name); | |
974 | strname.text = (unsigned char *) namep; | |
975 | strname.len = len - 1; | |
0d0bc036 | 976 | |
b6baa67d | 977 | if (cpp_interpret_string (parse_in, &strname, 1, &cstr, CPP_STRING)) |
46c2514e TT |
978 | { |
979 | XDELETEVEC (namep); | |
980 | return (const char *) cstr.text; | |
0d0bc036 | 981 | } |
0d0bc036 AH |
982 | |
983 | return namep; | |
0ba8a114 NS |
984 | } |
985 | ||
3c79fa86 AP |
986 | /* Expand DECL if it declares an entity not handled by the |
987 | common code. */ | |
988 | ||
989 | int | |
990 | c_expand_decl (tree decl) | |
991 | { | |
992 | if (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl)) | |
993 | { | |
994 | /* Let the back-end know about this variable. */ | |
995 | if (!anon_aggr_type_p (TREE_TYPE (decl))) | |
c22cacf3 | 996 | emit_local_var (decl); |
3c79fa86 | 997 | else |
c22cacf3 MS |
998 | expand_anon_union_decl (decl, NULL_TREE, |
999 | DECL_ANON_UNION_ELEMS (decl)); | |
3c79fa86 | 1000 | } |
3c79fa86 AP |
1001 | else |
1002 | return 0; | |
1003 | ||
1004 | return 1; | |
1005 | } | |
1006 | ||
1007 | ||
0ba8a114 NS |
1008 | /* Return the VAR_DECL for a const char array naming the current |
1009 | function. If the VAR_DECL has not yet been created, create it | |
1010 | now. RID indicates how it should be formatted and IDENTIFIER_NODE | |
1011 | ID is its name (unfortunately C and C++ hold the RID values of | |
1012 | keywords in different places, so we can't derive RID from ID in | |
f63d1bf7 | 1013 | this language independent code. */ |
0ba8a114 NS |
1014 | |
1015 | tree | |
35b1a6fa | 1016 | fname_decl (unsigned int rid, tree id) |
0ba8a114 NS |
1017 | { |
1018 | unsigned ix; | |
1019 | tree decl = NULL_TREE; | |
1020 | ||
1021 | for (ix = 0; fname_vars[ix].decl; ix++) | |
1022 | if (fname_vars[ix].rid == rid) | |
1023 | break; | |
1024 | ||
1025 | decl = *fname_vars[ix].decl; | |
1026 | if (!decl) | |
7da551a2 | 1027 | { |
8d3e27d1 DJ |
1028 | /* If a tree is built here, it would normally have the lineno of |
1029 | the current statement. Later this tree will be moved to the | |
1030 | beginning of the function and this line number will be wrong. | |
1031 | To avoid this problem set the lineno to 0 here; that prevents | |
4b7e68e7 | 1032 | it from appearing in the RTL. */ |
325c3691 | 1033 | tree stmts; |
3c20847b | 1034 | location_t saved_location = input_location; |
3c20847b | 1035 | input_location = UNKNOWN_LOCATION; |
35b1a6fa | 1036 | |
325c3691 | 1037 | stmts = push_stmt_list (); |
0ba8a114 | 1038 | decl = (*make_fname_decl) (id, fname_vars[ix].pretty); |
325c3691 RH |
1039 | stmts = pop_stmt_list (stmts); |
1040 | if (!IS_EMPTY_STMT (stmts)) | |
1041 | saved_function_name_decls | |
1042 | = tree_cons (decl, stmts, saved_function_name_decls); | |
0ba8a114 | 1043 | *fname_vars[ix].decl = decl; |
3c20847b | 1044 | input_location = saved_location; |
7da551a2 | 1045 | } |
0ba8a114 | 1046 | if (!ix && !current_function_decl) |
fcf73884 | 1047 | pedwarn (0, "%qD is not defined outside of function scope", decl); |
6cce57b0 | 1048 | |
0ba8a114 | 1049 | return decl; |
7da551a2 RS |
1050 | } |
1051 | ||
b84a3874 | 1052 | /* Given a STRING_CST, give it a suitable array-of-chars data type. */ |
b30f223b RS |
1053 | |
1054 | tree | |
35b1a6fa | 1055 | fix_string_type (tree value) |
b30f223b | 1056 | { |
b84a3874 RH |
1057 | int length = TREE_STRING_LENGTH (value); |
1058 | int nchars; | |
c162c75e MA |
1059 | tree e_type, i_type, a_type; |
1060 | ||
b57062ca | 1061 | /* Compute the number of elements, for the array type. */ |
b6baa67d KVH |
1062 | if (TREE_TYPE (value) == char_array_type_node || !TREE_TYPE (value)) |
1063 | { | |
1064 | nchars = length; | |
1065 | e_type = char_type_node; | |
1066 | } | |
1067 | else if (TREE_TYPE (value) == char16_array_type_node) | |
1068 | { | |
1069 | nchars = length / (TYPE_PRECISION (char16_type_node) / BITS_PER_UNIT); | |
1070 | e_type = char16_type_node; | |
1071 | } | |
1072 | else if (TREE_TYPE (value) == char32_array_type_node) | |
1073 | { | |
1074 | nchars = length / (TYPE_PRECISION (char32_type_node) / BITS_PER_UNIT); | |
1075 | e_type = char32_type_node; | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | nchars = length / (TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT); | |
1080 | e_type = wchar_type_node; | |
1081 | } | |
b30f223b | 1082 | |
89a42ac8 ZW |
1083 | /* C89 2.2.4.1, C99 5.2.4.1 (Translation limits). The analogous |
1084 | limit in C++98 Annex B is very large (65536) and is not normative, | |
1085 | so we do not diagnose it (warn_overlength_strings is forced off | |
1086 | in c_common_post_options). */ | |
1087 | if (warn_overlength_strings) | |
1088 | { | |
1089 | const int nchars_max = flag_isoc99 ? 4095 : 509; | |
1090 | const int relevant_std = flag_isoc99 ? 99 : 90; | |
1091 | if (nchars - 1 > nchars_max) | |
1092 | /* Translators: The %d after 'ISO C' will be 90 or 99. Do not | |
1093 | separate the %d from the 'C'. 'ISO' should not be | |
1094 | translated, but it may be moved after 'C%d' in languages | |
1095 | where modifiers follow nouns. */ | |
fcf73884 MLI |
1096 | pedwarn (OPT_Woverlength_strings, |
1097 | "string length %qd is greater than the length %qd " | |
89a42ac8 ZW |
1098 | "ISO C%d compilers are required to support", |
1099 | nchars - 1, nchars_max, relevant_std); | |
1100 | } | |
1326a48b | 1101 | |
cfb10bd3 GDR |
1102 | /* Create the array type for the string constant. The ISO C++ |
1103 | standard says that a string literal has type `const char[N]' or | |
1104 | `const wchar_t[N]'. We use the same logic when invoked as a C | |
1105 | front-end with -Wwrite-strings. | |
1106 | ??? We should change the type of an expression depending on the | |
1107 | state of a warning flag. We should just be warning -- see how | |
1108 | this is handled in the C++ front-end for the deprecated implicit | |
1109 | conversion from string literals to `char*' or `wchar_t*'. | |
c162c75e MA |
1110 | |
1111 | The C++ front end relies on TYPE_MAIN_VARIANT of a cv-qualified | |
1112 | array type being the unqualified version of that type. | |
1113 | Therefore, if we are constructing an array of const char, we must | |
1114 | construct the matching unqualified array type first. The C front | |
1115 | end does not require this, but it does no harm, so we do it | |
1116 | unconditionally. */ | |
7d60be94 | 1117 | i_type = build_index_type (build_int_cst (NULL_TREE, nchars - 1)); |
c162c75e | 1118 | a_type = build_array_type (e_type, i_type); |
cfb10bd3 | 1119 | if (c_dialect_cxx() || warn_write_strings) |
46df2823 | 1120 | a_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST); |
d9cf7c82 | 1121 | |
c162c75e | 1122 | TREE_TYPE (value) = a_type; |
ccd4c832 | 1123 | TREE_CONSTANT (value) = 1; |
3521b33c | 1124 | TREE_READONLY (value) = 1; |
b30f223b RS |
1125 | TREE_STATIC (value) = 1; |
1126 | return value; | |
1127 | } | |
1128 | \f | |
d74154d5 RS |
1129 | /* Print a warning if a constant expression had overflow in folding. |
1130 | Invoke this function on every expression that the language | |
1131 | requires to be a constant expression. | |
1132 | Note the ANSI C standard says it is erroneous for a | |
1133 | constant expression to overflow. */ | |
96571883 BK |
1134 | |
1135 | void | |
35b1a6fa | 1136 | constant_expression_warning (tree value) |
393eda6a MLI |
1137 | { |
1138 | if (warn_overflow && pedantic | |
1139 | && (TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST | |
1140 | || TREE_CODE (value) == FIXED_CST | |
1141 | || TREE_CODE (value) == VECTOR_CST | |
1142 | || TREE_CODE (value) == COMPLEX_CST) | |
1143 | && TREE_OVERFLOW (value)) | |
fcf73884 | 1144 | pedwarn (OPT_Woverflow, "overflow in constant expression"); |
393eda6a MLI |
1145 | } |
1146 | ||
1147 | /* The same as above but print an unconditional error. */ | |
1148 | void | |
1149 | constant_expression_error (tree value) | |
96571883 | 1150 | { |
c05f751c | 1151 | if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST |
ab22c1fa | 1152 | || TREE_CODE (value) == FIXED_CST |
69ef87e2 | 1153 | || TREE_CODE (value) == VECTOR_CST |
c05f751c | 1154 | || TREE_CODE (value) == COMPLEX_CST) |
393eda6a MLI |
1155 | && TREE_OVERFLOW (value)) |
1156 | error ("overflow in constant expression"); | |
d74154d5 RS |
1157 | } |
1158 | ||
59c0753d MLI |
1159 | /* Print a warning if an expression had overflow in folding and its |
1160 | operands hadn't. | |
1161 | ||
d74154d5 RS |
1162 | Invoke this function on every expression that |
1163 | (1) appears in the source code, and | |
59c0753d | 1164 | (2) is a constant expression that overflowed, and |
d74154d5 | 1165 | (3) is not already checked by convert_and_check; |
59c0753d MLI |
1166 | however, do not invoke this function on operands of explicit casts |
1167 | or when the expression is the result of an operator and any operand | |
1168 | already overflowed. */ | |
d74154d5 RS |
1169 | |
1170 | void | |
35b1a6fa | 1171 | overflow_warning (tree value) |
d74154d5 | 1172 | { |
59c0753d MLI |
1173 | if (skip_evaluation) return; |
1174 | ||
1175 | switch (TREE_CODE (value)) | |
69ef87e2 | 1176 | { |
59c0753d MLI |
1177 | case INTEGER_CST: |
1178 | warning (OPT_Woverflow, "integer overflow in expression"); | |
1179 | break; | |
1180 | ||
1181 | case REAL_CST: | |
1182 | warning (OPT_Woverflow, "floating point overflow in expression"); | |
1183 | break; | |
1184 | ||
ab22c1fa CF |
1185 | case FIXED_CST: |
1186 | warning (OPT_Woverflow, "fixed-point overflow in expression"); | |
1187 | break; | |
1188 | ||
59c0753d MLI |
1189 | case VECTOR_CST: |
1190 | warning (OPT_Woverflow, "vector overflow in expression"); | |
1191 | break; | |
1192 | ||
1193 | case COMPLEX_CST: | |
1194 | if (TREE_CODE (TREE_REALPART (value)) == INTEGER_CST) | |
1195 | warning (OPT_Woverflow, "complex integer overflow in expression"); | |
1196 | else if (TREE_CODE (TREE_REALPART (value)) == REAL_CST) | |
1197 | warning (OPT_Woverflow, "complex floating point overflow in expression"); | |
1198 | break; | |
1199 | ||
1200 | default: | |
1201 | break; | |
69ef87e2 | 1202 | } |
d74154d5 RS |
1203 | } |
1204 | ||
63a08740 DM |
1205 | |
1206 | /* Warn about use of a logical || / && operator being used in a | |
1207 | context where it is likely that the bitwise equivalent was intended | |
1208 | by the programmer. CODE is the TREE_CODE of the operator, ARG1 | |
1209 | and ARG2 the arguments. */ | |
1210 | ||
1211 | void | |
1212 | warn_logical_operator (enum tree_code code, tree arg1, tree | |
1213 | arg2) | |
1214 | { | |
1215 | switch (code) | |
1216 | { | |
1217 | case TRUTH_ANDIF_EXPR: | |
1218 | case TRUTH_ORIF_EXPR: | |
1219 | case TRUTH_OR_EXPR: | |
1220 | case TRUTH_AND_EXPR: | |
89132ebc DM |
1221 | if (!TREE_NO_WARNING (arg1) |
1222 | && INTEGRAL_TYPE_P (TREE_TYPE (arg1)) | |
1223 | && !CONSTANT_CLASS_P (arg1) | |
1224 | && TREE_CODE (arg2) == INTEGER_CST | |
1225 | && !integer_zerop (arg2)) | |
1226 | { | |
1227 | warning (OPT_Wlogical_op, | |
1228 | "logical %<%s%> with non-zero constant " | |
1229 | "will always evaluate as true", | |
1230 | ((code == TRUTH_ANDIF_EXPR) | |
1231 | || (code == TRUTH_AND_EXPR)) ? "&&" : "||"); | |
1232 | TREE_NO_WARNING (arg1) = true; | |
1233 | } | |
1234 | break; | |
63a08740 | 1235 | default: |
89132ebc | 1236 | break; |
63a08740 DM |
1237 | } |
1238 | } | |
1239 | ||
1240 | ||
de9c56a4 RG |
1241 | /* Print a warning about casts that might indicate violation |
1242 | of strict aliasing rules if -Wstrict-aliasing is used and | |
3f0a2a47 DM |
1243 | strict aliasing mode is in effect. OTYPE is the original |
1244 | TREE_TYPE of EXPR, and TYPE the type we're casting to. */ | |
de9c56a4 | 1245 | |
79bedddc | 1246 | bool |
3f0a2a47 | 1247 | strict_aliasing_warning (tree otype, tree type, tree expr) |
de9c56a4 | 1248 | { |
ac7ee6ad RG |
1249 | if (!(flag_strict_aliasing |
1250 | && POINTER_TYPE_P (type) | |
1251 | && POINTER_TYPE_P (otype) | |
1252 | && !VOID_TYPE_P (TREE_TYPE (type))) | |
1253 | /* If the type we are casting to is a ref-all pointer | |
1254 | dereferencing it is always valid. */ | |
1255 | || TYPE_REF_CAN_ALIAS_ALL (type)) | |
79bedddc SR |
1256 | return false; |
1257 | ||
1258 | if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR | |
de9c56a4 | 1259 | && (DECL_P (TREE_OPERAND (expr, 0)) |
79bedddc | 1260 | || handled_component_p (TREE_OPERAND (expr, 0)))) |
de9c56a4 RG |
1261 | { |
1262 | /* Casting the address of an object to non void pointer. Warn | |
1263 | if the cast breaks type based aliasing. */ | |
79bedddc SR |
1264 | if (!COMPLETE_TYPE_P (TREE_TYPE (type)) && warn_strict_aliasing == 2) |
1265 | { | |
1266 | warning (OPT_Wstrict_aliasing, "type-punning to incomplete type " | |
1267 | "might break strict-aliasing rules"); | |
1268 | return true; | |
1269 | } | |
de9c56a4 RG |
1270 | else |
1271 | { | |
79bedddc SR |
1272 | /* warn_strict_aliasing >= 3. This includes the default (3). |
1273 | Only warn if the cast is dereferenced immediately. */ | |
4862826d | 1274 | alias_set_type set1 = |
79bedddc | 1275 | get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0))); |
4862826d | 1276 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); |
de9c56a4 | 1277 | |
4653cae5 RG |
1278 | if (set1 != set2 && set2 != 0 |
1279 | && (set1 == 0 || !alias_sets_conflict_p (set1, set2))) | |
79bedddc SR |
1280 | { |
1281 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1282 | "pointer will break strict-aliasing rules"); | |
1283 | return true; | |
1284 | } | |
1285 | else if (warn_strict_aliasing == 2 | |
836f7794 | 1286 | && !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
1287 | { |
1288 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1289 | "pointer might break strict-aliasing rules"); | |
1290 | return true; | |
1291 | } | |
de9c56a4 RG |
1292 | } |
1293 | } | |
79bedddc SR |
1294 | else |
1295 | if ((warn_strict_aliasing == 1) && !VOID_TYPE_P (TREE_TYPE (otype))) | |
1296 | { | |
1297 | /* At this level, warn for any conversions, even if an address is | |
1298 | not taken in the same statement. This will likely produce many | |
1299 | false positives, but could be useful to pinpoint problems that | |
1300 | are not revealed at higher levels. */ | |
4862826d ILT |
1301 | alias_set_type set1 = get_alias_set (TREE_TYPE (otype)); |
1302 | alias_set_type set2 = get_alias_set (TREE_TYPE (type)); | |
1303 | if (!COMPLETE_TYPE_P (type) | |
836f7794 | 1304 | || !alias_sets_must_conflict_p (set1, set2)) |
79bedddc SR |
1305 | { |
1306 | warning (OPT_Wstrict_aliasing, "dereferencing type-punned " | |
1307 | "pointer might break strict-aliasing rules"); | |
1308 | return true; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | return false; | |
de9c56a4 RG |
1313 | } |
1314 | ||
74ac79fa DM |
1315 | /* Print a warning about if (); or if () .. else; constructs |
1316 | via the special empty statement node that we create. INNER_THEN | |
1317 | and INNER_ELSE are the statement lists of the if and the else | |
1318 | block. */ | |
1319 | ||
1320 | void | |
62e00e94 | 1321 | empty_if_body_warning (tree inner_then, tree inner_else) |
74ac79fa | 1322 | { |
62e00e94 DM |
1323 | if (TREE_CODE (inner_then) == STATEMENT_LIST |
1324 | && STATEMENT_LIST_TAIL (inner_then)) | |
1325 | inner_then = STATEMENT_LIST_TAIL (inner_then)->stmt; | |
1326 | ||
1327 | if (inner_else && TREE_CODE (inner_else) == STATEMENT_LIST | |
1328 | && STATEMENT_LIST_TAIL (inner_else)) | |
1329 | inner_else = STATEMENT_LIST_TAIL (inner_else)->stmt; | |
1330 | ||
1331 | if (IS_EMPTY_STMT (inner_then) && !inner_else) | |
1332 | warning (OPT_Wempty_body, "%Hsuggest braces around empty body " | |
1333 | "in an %<if%> statement", EXPR_LOCUS (inner_then)); | |
1334 | ||
1335 | else if (inner_else && IS_EMPTY_STMT (inner_else)) | |
1336 | warning (OPT_Wempty_body, "%Hsuggest braces around empty body " | |
1337 | "in an %<else%> statement", EXPR_LOCUS (inner_else)); | |
74ac79fa DM |
1338 | } |
1339 | ||
a1e45ff0 DM |
1340 | /* Warn for unlikely, improbable, or stupid DECL declarations |
1341 | of `main'. */ | |
1342 | ||
1343 | void | |
1344 | check_main_parameter_types (tree decl) | |
1345 | { | |
1346 | tree args; | |
1347 | int argct = 0; | |
1348 | ||
1349 | for (args = TYPE_ARG_TYPES (TREE_TYPE (decl)); args; | |
1350 | args = TREE_CHAIN (args)) | |
1351 | { | |
1352 | tree type = args ? TREE_VALUE (args) : 0; | |
1353 | ||
d8e1d619 | 1354 | if (type == void_type_node || type == error_mark_node ) |
a1e45ff0 DM |
1355 | break; |
1356 | ||
1357 | ++argct; | |
1358 | switch (argct) | |
1359 | { | |
1360 | case 1: | |
1361 | if (TYPE_MAIN_VARIANT (type) != integer_type_node) | |
4003301d MLI |
1362 | pedwarn (OPT_Wmain, "first argument of %q+D should be %<int%>", |
1363 | decl); | |
a1e45ff0 DM |
1364 | break; |
1365 | ||
1366 | case 2: | |
1367 | if (TREE_CODE (type) != POINTER_TYPE | |
1368 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1369 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1370 | != char_type_node)) | |
4003301d MLI |
1371 | pedwarn (OPT_Wmain, "second argument of %q+D should be %<char **%>", |
1372 | decl); | |
a1e45ff0 DM |
1373 | break; |
1374 | ||
1375 | case 3: | |
1376 | if (TREE_CODE (type) != POINTER_TYPE | |
1377 | || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE | |
1378 | || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type))) | |
1379 | != char_type_node)) | |
4003301d MLI |
1380 | pedwarn (OPT_Wmain, "third argument of %q+D should probably be " |
1381 | "%<char **%>", decl); | |
a1e45ff0 DM |
1382 | break; |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /* It is intentional that this message does not mention the third | |
1387 | argument because it's only mentioned in an appendix of the | |
1388 | standard. */ | |
1389 | if (argct > 0 && (argct < 2 || argct > 3)) | |
4003301d | 1390 | pedwarn (OPT_Wmain, "%q+D takes only zero or two arguments", decl); |
a1e45ff0 DM |
1391 | } |
1392 | ||
f83c7f63 DJ |
1393 | /* True if pointers to distinct types T1 and T2 can be converted to |
1394 | each other without an explicit cast. Only returns true for opaque | |
1395 | vector types. */ | |
1396 | bool | |
1397 | vector_targets_convertible_p (const_tree t1, const_tree t2) | |
1398 | { | |
1399 | if (TREE_CODE (t1) == VECTOR_TYPE && TREE_CODE (t2) == VECTOR_TYPE | |
1400 | && (targetm.vector_opaque_p (t1) || targetm.vector_opaque_p (t2)) | |
1401 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) | |
1402 | return true; | |
1403 | ||
1404 | return false; | |
1405 | } | |
1406 | ||
00c8e9f6 MS |
1407 | /* True if vector types T1 and T2 can be converted to each other |
1408 | without an explicit cast. If EMIT_LAX_NOTE is true, and T1 and T2 | |
1409 | can only be converted with -flax-vector-conversions yet that is not | |
1410 | in effect, emit a note telling the user about that option if such | |
1411 | a note has not previously been emitted. */ | |
1412 | bool | |
58f9752a | 1413 | vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note) |
cc27e657 | 1414 | { |
00c8e9f6 | 1415 | static bool emitted_lax_note = false; |
14e765da JM |
1416 | bool convertible_lax; |
1417 | ||
1418 | if ((targetm.vector_opaque_p (t1) || targetm.vector_opaque_p (t2)) | |
1419 | && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))) | |
1420 | return true; | |
1421 | ||
1422 | convertible_lax = | |
1423 | (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)) | |
1424 | && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE || | |
1425 | TYPE_PRECISION (t1) == TYPE_PRECISION (t2)) | |
1426 | && (INTEGRAL_TYPE_P (TREE_TYPE (t1)) | |
1427 | == INTEGRAL_TYPE_P (TREE_TYPE (t2)))); | |
00c8e9f6 MS |
1428 | |
1429 | if (!convertible_lax || flag_lax_vector_conversions) | |
1430 | return convertible_lax; | |
1431 | ||
1432 | if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) | |
cf7bc668 | 1433 | && lang_hooks.types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
00c8e9f6 MS |
1434 | return true; |
1435 | ||
1436 | if (emit_lax_note && !emitted_lax_note) | |
1437 | { | |
1438 | emitted_lax_note = true; | |
1f5b3869 | 1439 | inform (input_location, "use -flax-vector-conversions to permit " |
00c8e9f6 MS |
1440 | "conversions between vectors with differing " |
1441 | "element types or numbers of subparts"); | |
1442 | } | |
1443 | ||
1444 | return false; | |
cc27e657 PB |
1445 | } |
1446 | ||
6715192c MLI |
1447 | /* This is a helper function of build_binary_op. |
1448 | ||
1449 | For certain operations if both args were extended from the same | |
1450 | smaller type, do the arithmetic in that type and then extend. | |
1451 | ||
1452 | BITWISE indicates a bitwise operation. | |
1453 | For them, this optimization is safe only if | |
1454 | both args are zero-extended or both are sign-extended. | |
1455 | Otherwise, we might change the result. | |
1456 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
1457 | but calculated in (unsigned short) it would be (unsigned short)-1. | |
1458 | */ | |
1459 | tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise) | |
1460 | { | |
1461 | int unsigned0, unsigned1; | |
1462 | tree arg0, arg1; | |
1463 | int uns; | |
1464 | tree type; | |
1465 | ||
1466 | /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents | |
1467 | excessive narrowing when we call get_narrower below. For | |
1468 | example, suppose that OP0 is of unsigned int extended | |
1469 | from signed char and that RESULT_TYPE is long long int. | |
1470 | If we explicitly cast OP0 to RESULT_TYPE, OP0 would look | |
1471 | like | |
1472 | ||
1473 | (long long int) (unsigned int) signed_char | |
1474 | ||
1475 | which get_narrower would narrow down to | |
1476 | ||
1477 | (unsigned int) signed char | |
1478 | ||
1479 | If we do not cast OP0 first, get_narrower would return | |
1480 | signed_char, which is inconsistent with the case of the | |
1481 | explicit cast. */ | |
1482 | op0 = convert (result_type, op0); | |
1483 | op1 = convert (result_type, op1); | |
1484 | ||
1485 | arg0 = get_narrower (op0, &unsigned0); | |
1486 | arg1 = get_narrower (op1, &unsigned1); | |
1487 | ||
1488 | /* UNS is 1 if the operation to be done is an unsigned one. */ | |
1489 | uns = TYPE_UNSIGNED (result_type); | |
1490 | ||
1491 | /* Handle the case that OP0 (or OP1) does not *contain* a conversion | |
1492 | but it *requires* conversion to FINAL_TYPE. */ | |
1493 | ||
1494 | if ((TYPE_PRECISION (TREE_TYPE (op0)) | |
1495 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1496 | && TREE_TYPE (op0) != result_type) | |
1497 | unsigned0 = TYPE_UNSIGNED (TREE_TYPE (op0)); | |
1498 | if ((TYPE_PRECISION (TREE_TYPE (op1)) | |
1499 | == TYPE_PRECISION (TREE_TYPE (arg1))) | |
1500 | && TREE_TYPE (op1) != result_type) | |
1501 | unsigned1 = TYPE_UNSIGNED (TREE_TYPE (op1)); | |
1502 | ||
1503 | /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ | |
1504 | ||
1505 | /* For bitwise operations, signedness of nominal type | |
1506 | does not matter. Consider only how operands were extended. */ | |
1507 | if (bitwise) | |
1508 | uns = unsigned0; | |
1509 | ||
1510 | /* Note that in all three cases below we refrain from optimizing | |
1511 | an unsigned operation on sign-extended args. | |
1512 | That would not be valid. */ | |
1513 | ||
1514 | /* Both args variable: if both extended in same way | |
1515 | from same width, do it in that width. | |
1516 | Do it unsigned if args were zero-extended. */ | |
1517 | if ((TYPE_PRECISION (TREE_TYPE (arg0)) | |
1518 | < TYPE_PRECISION (result_type)) | |
1519 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1520 | == TYPE_PRECISION (TREE_TYPE (arg0))) | |
1521 | && unsigned0 == unsigned1 | |
1522 | && (unsigned0 || !uns)) | |
1523 | return c_common_signed_or_unsigned_type | |
1524 | (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); | |
1525 | ||
1526 | else if (TREE_CODE (arg0) == INTEGER_CST | |
1527 | && (unsigned1 || !uns) | |
1528 | && (TYPE_PRECISION (TREE_TYPE (arg1)) | |
1529 | < TYPE_PRECISION (result_type)) | |
1530 | && (type | |
1531 | = c_common_signed_or_unsigned_type (unsigned1, | |
1532 | TREE_TYPE (arg1))) | |
1533 | && !POINTER_TYPE_P (type) | |
1534 | && int_fits_type_p (arg0, type)) | |
1535 | return type; | |
1536 | ||
1537 | else if (TREE_CODE (arg1) == INTEGER_CST | |
1538 | && (unsigned0 || !uns) | |
1539 | && (TYPE_PRECISION (TREE_TYPE (arg0)) | |
1540 | < TYPE_PRECISION (result_type)) | |
1541 | && (type | |
1542 | = c_common_signed_or_unsigned_type (unsigned0, | |
1543 | TREE_TYPE (arg0))) | |
1544 | && !POINTER_TYPE_P (type) | |
1545 | && int_fits_type_p (arg1, type)) | |
1546 | return type; | |
1547 | ||
1548 | return result_type; | |
1549 | } | |
1550 | ||
422c3a54 | 1551 | /* Warns if the conversion of EXPR to TYPE may alter a value. |
07231d4f | 1552 | This is a helper function for warnings_for_convert_and_check. */ |
422c3a54 MLI |
1553 | |
1554 | static void | |
1555 | conversion_warning (tree type, tree expr) | |
1556 | { | |
1557 | bool give_warning = false; | |
1558 | ||
0011dedb MLI |
1559 | int i; |
1560 | const int expr_num_operands = TREE_OPERAND_LENGTH (expr); | |
374035cb | 1561 | tree expr_type = TREE_TYPE (expr); |
422c3a54 | 1562 | |
7060db96 MLI |
1563 | if (!warn_conversion && !warn_sign_conversion) |
1564 | return; | |
1565 | ||
0011dedb MLI |
1566 | /* If any operand is artificial, then this expression was generated |
1567 | by the compiler and we do not warn. */ | |
1568 | for (i = 0; i < expr_num_operands; i++) | |
1569 | { | |
1570 | tree op = TREE_OPERAND (expr, i); | |
1571 | if (DECL_P (op) && DECL_ARTIFICIAL (op)) | |
1572 | return; | |
1573 | } | |
1574 | ||
374035cb | 1575 | switch (TREE_CODE (expr)) |
422c3a54 | 1576 | { |
374035cb MLI |
1577 | case EQ_EXPR: |
1578 | case NE_EXPR: | |
1579 | case LE_EXPR: | |
1580 | case GE_EXPR: | |
1581 | case LT_EXPR: | |
1582 | case GT_EXPR: | |
1583 | case TRUTH_ANDIF_EXPR: | |
1584 | case TRUTH_ORIF_EXPR: | |
1585 | case TRUTH_AND_EXPR: | |
1586 | case TRUTH_OR_EXPR: | |
1587 | case TRUTH_XOR_EXPR: | |
1588 | case TRUTH_NOT_EXPR: | |
1589 | /* Conversion from boolean to a signed:1 bit-field (which only | |
1590 | can hold the values 0 and -1) doesn't lose information - but | |
1591 | it does change the value. */ | |
1592 | if (TYPE_PRECISION (type) == 1 && !TYPE_UNSIGNED (type)) | |
1593 | warning (OPT_Wconversion, | |
1594 | "conversion to %qT from boolean expression", type); | |
1595 | return; | |
1596 | ||
1597 | case REAL_CST: | |
1598 | case INTEGER_CST: | |
1599 | ||
422c3a54 MLI |
1600 | /* Warn for real constant that is not an exact integer converted |
1601 | to integer type. */ | |
374035cb | 1602 | if (TREE_CODE (expr_type) == REAL_TYPE |
422c3a54 MLI |
1603 | && TREE_CODE (type) == INTEGER_TYPE) |
1604 | { | |
374035cb | 1605 | if (!real_isinteger (TREE_REAL_CST_PTR (expr), TYPE_MODE (expr_type))) |
422c3a54 MLI |
1606 | give_warning = true; |
1607 | } | |
91c41804 | 1608 | /* Warn for an integer constant that does not fit into integer type. */ |
374035cb | 1609 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
422c3a54 | 1610 | && TREE_CODE (type) == INTEGER_TYPE |
91c41804 RS |
1611 | && !int_fits_type_p (expr, type)) |
1612 | { | |
374035cb MLI |
1613 | if (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type) |
1614 | && tree_int_cst_sgn (expr) < 0) | |
7060db96 MLI |
1615 | warning (OPT_Wsign_conversion, |
1616 | "negative integer implicitly converted to unsigned type"); | |
374035cb MLI |
1617 | else if (!TYPE_UNSIGNED (type) && TYPE_UNSIGNED (expr_type)) |
1618 | warning (OPT_Wsign_conversion, "conversion of unsigned constant " | |
1619 | "value to negative integer"); | |
7060db96 MLI |
1620 | else |
1621 | give_warning = true; | |
91c41804 | 1622 | } |
422c3a54 MLI |
1623 | else if (TREE_CODE (type) == REAL_TYPE) |
1624 | { | |
1625 | /* Warn for an integer constant that does not fit into real type. */ | |
374035cb | 1626 | if (TREE_CODE (expr_type) == INTEGER_TYPE) |
422c3a54 MLI |
1627 | { |
1628 | REAL_VALUE_TYPE a = real_value_from_int_cst (0, expr); | |
1629 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1630 | give_warning = true; | |
1631 | } | |
1632 | /* Warn for a real constant that does not fit into a smaller | |
1633 | real type. */ | |
374035cb MLI |
1634 | else if (TREE_CODE (expr_type) == REAL_TYPE |
1635 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) | |
422c3a54 MLI |
1636 | { |
1637 | REAL_VALUE_TYPE a = TREE_REAL_CST (expr); | |
1638 | if (!exact_real_truncate (TYPE_MODE (type), &a)) | |
1639 | give_warning = true; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | if (give_warning) | |
1644 | warning (OPT_Wconversion, | |
1645 | "conversion to %qT alters %qT constant value", | |
374035cb MLI |
1646 | type, expr_type); |
1647 | ||
1648 | return; | |
1649 | ||
1650 | case COND_EXPR: | |
1651 | { | |
1652 | /* In case of COND_EXPR, if both operands are constants or | |
1653 | COND_EXPR, then we do not care about the type of COND_EXPR, | |
1654 | only about the conversion of each operand. */ | |
1655 | tree op1 = TREE_OPERAND (expr, 1); | |
1656 | tree op2 = TREE_OPERAND (expr, 2); | |
1657 | ||
1658 | if ((TREE_CODE (op1) == REAL_CST || TREE_CODE (op1) == INTEGER_CST | |
1659 | || TREE_CODE (op1) == COND_EXPR) | |
1660 | && (TREE_CODE (op2) == REAL_CST || TREE_CODE (op2) == INTEGER_CST | |
1661 | || TREE_CODE (op2) == COND_EXPR)) | |
1662 | { | |
1663 | conversion_warning (type, op1); | |
1664 | conversion_warning (type, op2); | |
1665 | return; | |
1666 | } | |
1667 | /* Fall through. */ | |
1668 | } | |
1669 | ||
1670 | default: /* 'expr' is not a constant. */ | |
6715192c | 1671 | |
422c3a54 | 1672 | /* Warn for real types converted to integer types. */ |
6715192c | 1673 | if (TREE_CODE (expr_type) == REAL_TYPE |
422c3a54 MLI |
1674 | && TREE_CODE (type) == INTEGER_TYPE) |
1675 | give_warning = true; | |
1676 | ||
6715192c | 1677 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
422c3a54 MLI |
1678 | && TREE_CODE (type) == INTEGER_TYPE) |
1679 | { | |
cfdaefec | 1680 | /* Don't warn about unsigned char y = 0xff, x = (int) y; */ |
c00e8b06 | 1681 | expr = get_unwidened (expr, 0); |
6715192c | 1682 | expr_type = TREE_TYPE (expr); |
cfdaefec | 1683 | |
6715192c MLI |
1684 | /* Don't warn for short y; short x = ((int)y & 0xff); */ |
1685 | if (TREE_CODE (expr) == BIT_AND_EXPR | |
374035cb | 1686 | || TREE_CODE (expr) == BIT_IOR_EXPR |
6715192c MLI |
1687 | || TREE_CODE (expr) == BIT_XOR_EXPR) |
1688 | { | |
374035cb MLI |
1689 | /* If both args were extended from a shortest type, |
1690 | use that type if that is safe. */ | |
6715192c MLI |
1691 | expr_type = shorten_binary_op (expr_type, |
1692 | TREE_OPERAND (expr, 0), | |
1693 | TREE_OPERAND (expr, 1), | |
1694 | /* bitwise */1); | |
1695 | ||
1696 | /* If one of the operands is a non-negative constant | |
1697 | that fits in the target type, then the type of the | |
1698 | other operand does not matter. */ | |
1699 | if (TREE_CODE (expr) == BIT_AND_EXPR) | |
1700 | { | |
1701 | tree op0 = TREE_OPERAND (expr, 0); | |
1702 | tree op1 = TREE_OPERAND (expr, 1); | |
1703 | if ((TREE_CODE (op0) == INTEGER_CST | |
1704 | && int_fits_type_p (op0, c_common_signed_type (type)) | |
1705 | && int_fits_type_p (op0, c_common_unsigned_type (type))) | |
1706 | || (TREE_CODE (op1) == INTEGER_CST | |
374035cb MLI |
1707 | && int_fits_type_p (op1, c_common_signed_type (type)) |
1708 | && int_fits_type_p (op1, | |
1709 | c_common_unsigned_type (type)))) | |
6715192c MLI |
1710 | return; |
1711 | } | |
1712 | } | |
422c3a54 | 1713 | /* Warn for integer types converted to smaller integer types. */ |
374035cb | 1714 | if (TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
7060db96 MLI |
1715 | give_warning = true; |
1716 | ||
1717 | /* When they are the same width but different signedness, | |
1718 | then the value may change. */ | |
374035cb | 1719 | else if ((TYPE_PRECISION (type) == TYPE_PRECISION (expr_type) |
6715192c | 1720 | && TYPE_UNSIGNED (expr_type) != TYPE_UNSIGNED (type)) |
7060db96 MLI |
1721 | /* Even when converted to a bigger type, if the type is |
1722 | unsigned but expr is signed, then negative values | |
1723 | will be changed. */ | |
6715192c | 1724 | || (TYPE_UNSIGNED (type) && !TYPE_UNSIGNED (expr_type))) |
374035cb MLI |
1725 | warning (OPT_Wsign_conversion, "conversion to %qT from %qT " |
1726 | "may change the sign of the result", | |
6715192c | 1727 | type, expr_type); |
422c3a54 MLI |
1728 | } |
1729 | ||
1730 | /* Warn for integer types converted to real types if and only if | |
1731 | all the range of values of the integer type cannot be | |
1732 | represented by the real type. */ | |
6715192c | 1733 | else if (TREE_CODE (expr_type) == INTEGER_TYPE |
422c3a54 MLI |
1734 | && TREE_CODE (type) == REAL_TYPE) |
1735 | { | |
6715192c MLI |
1736 | tree type_low_bound = TYPE_MIN_VALUE (expr_type); |
1737 | tree type_high_bound = TYPE_MAX_VALUE (expr_type); | |
374035cb MLI |
1738 | REAL_VALUE_TYPE real_low_bound |
1739 | = real_value_from_int_cst (0, type_low_bound); | |
1740 | REAL_VALUE_TYPE real_high_bound | |
1741 | = real_value_from_int_cst (0, type_high_bound); | |
422c3a54 MLI |
1742 | |
1743 | if (!exact_real_truncate (TYPE_MODE (type), &real_low_bound) | |
1744 | || !exact_real_truncate (TYPE_MODE (type), &real_high_bound)) | |
1745 | give_warning = true; | |
1746 | } | |
1747 | ||
1748 | /* Warn for real types converted to smaller real types. */ | |
6715192c | 1749 | else if (TREE_CODE (expr_type) == REAL_TYPE |
422c3a54 | 1750 | && TREE_CODE (type) == REAL_TYPE |
374035cb | 1751 | && TYPE_PRECISION (type) < TYPE_PRECISION (expr_type)) |
422c3a54 MLI |
1752 | give_warning = true; |
1753 | ||
1754 | ||
1755 | if (give_warning) | |
1756 | warning (OPT_Wconversion, | |
1757 | "conversion to %qT from %qT may alter its value", | |
6715192c | 1758 | type, expr_type); |
422c3a54 MLI |
1759 | } |
1760 | } | |
1761 | ||
07231d4f MLI |
1762 | /* Produce warnings after a conversion. RESULT is the result of |
1763 | converting EXPR to TYPE. This is a helper function for | |
1764 | convert_and_check and cp_convert_and_check. */ | |
d74154d5 | 1765 | |
07231d4f MLI |
1766 | void |
1767 | warnings_for_convert_and_check (tree type, tree expr, tree result) | |
d74154d5 | 1768 | { |
91c41804 RS |
1769 | if (TREE_CODE (expr) == INTEGER_CST |
1770 | && (TREE_CODE (type) == INTEGER_TYPE | |
1771 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
1772 | && !int_fits_type_p (expr, type)) | |
1773 | { | |
422c3a54 MLI |
1774 | /* Do not diagnose overflow in a constant expression merely |
1775 | because a conversion overflowed. */ | |
91c41804 | 1776 | if (TREE_OVERFLOW (result)) |
d95787e6 RS |
1777 | TREE_OVERFLOW (result) = TREE_OVERFLOW (expr); |
1778 | ||
91c41804 | 1779 | if (TYPE_UNSIGNED (type)) |
422c3a54 | 1780 | { |
91c41804 RS |
1781 | /* This detects cases like converting -129 or 256 to |
1782 | unsigned char. */ | |
1783 | if (!int_fits_type_p (expr, c_common_signed_type (type))) | |
1784 | warning (OPT_Woverflow, | |
1785 | "large integer implicitly truncated to unsigned type"); | |
7060db96 | 1786 | else |
91c41804 RS |
1787 | conversion_warning (type, expr); |
1788 | } | |
12753674 | 1789 | else if (!int_fits_type_p (expr, c_common_unsigned_type (type))) |
f73fe417 MLI |
1790 | warning (OPT_Woverflow, |
1791 | "overflow in implicit constant conversion"); | |
1792 | /* No warning for converting 0x80000000 to int. */ | |
1793 | else if (pedantic | |
1794 | && (TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE | |
1795 | || TYPE_PRECISION (TREE_TYPE (expr)) | |
1796 | != TYPE_PRECISION (type))) | |
1797 | warning (OPT_Woverflow, | |
1798 | "overflow in implicit constant conversion"); | |
1799 | ||
7060db96 | 1800 | else |
f73fe417 | 1801 | conversion_warning (type, expr); |
d74154d5 | 1802 | } |
ab22c1fa CF |
1803 | else if ((TREE_CODE (result) == INTEGER_CST |
1804 | || TREE_CODE (result) == FIXED_CST) && TREE_OVERFLOW (result)) | |
91c41804 RS |
1805 | warning (OPT_Woverflow, |
1806 | "overflow in implicit constant conversion"); | |
7060db96 | 1807 | else |
91c41804 | 1808 | conversion_warning (type, expr); |
07231d4f MLI |
1809 | } |
1810 | ||
1811 | ||
1812 | /* Convert EXPR to TYPE, warning about conversion problems with constants. | |
1813 | Invoke this function on every expression that is converted implicitly, | |
1814 | i.e. because of language rules and not because of an explicit cast. */ | |
1815 | ||
1816 | tree | |
1817 | convert_and_check (tree type, tree expr) | |
1818 | { | |
1819 | tree result; | |
1820 | ||
1821 | if (TREE_TYPE (expr) == type) | |
1822 | return expr; | |
91c41804 | 1823 | |
07231d4f MLI |
1824 | result = convert (type, expr); |
1825 | ||
7060db96 | 1826 | if (!skip_evaluation && !TREE_OVERFLOW_P (expr) && result != error_mark_node) |
07231d4f MLI |
1827 | warnings_for_convert_and_check (type, expr, result); |
1828 | ||
91c41804 | 1829 | return result; |
96571883 BK |
1830 | } |
1831 | \f | |
235cfbc4 BS |
1832 | /* A node in a list that describes references to variables (EXPR), which are |
1833 | either read accesses if WRITER is zero, or write accesses, in which case | |
1834 | WRITER is the parent of EXPR. */ | |
1835 | struct tlist | |
1836 | { | |
1837 | struct tlist *next; | |
1838 | tree expr, writer; | |
1839 | }; | |
1840 | ||
1841 | /* Used to implement a cache the results of a call to verify_tree. We only | |
1842 | use this for SAVE_EXPRs. */ | |
1843 | struct tlist_cache | |
1844 | { | |
1845 | struct tlist_cache *next; | |
1846 | struct tlist *cache_before_sp; | |
1847 | struct tlist *cache_after_sp; | |
1848 | tree expr; | |
2683ed8d BS |
1849 | }; |
1850 | ||
235cfbc4 BS |
1851 | /* Obstack to use when allocating tlist structures, and corresponding |
1852 | firstobj. */ | |
1853 | static struct obstack tlist_obstack; | |
1854 | static char *tlist_firstobj = 0; | |
1855 | ||
1856 | /* Keep track of the identifiers we've warned about, so we can avoid duplicate | |
1857 | warnings. */ | |
1858 | static struct tlist *warned_ids; | |
1859 | /* SAVE_EXPRs need special treatment. We process them only once and then | |
1860 | cache the results. */ | |
1861 | static struct tlist_cache *save_expr_cache; | |
1862 | ||
35b1a6fa AJ |
1863 | static void add_tlist (struct tlist **, struct tlist *, tree, int); |
1864 | static void merge_tlist (struct tlist **, struct tlist *, int); | |
1865 | static void verify_tree (tree, struct tlist **, struct tlist **, tree); | |
1866 | static int warning_candidate_p (tree); | |
1867 | static void warn_for_collisions (struct tlist *); | |
1868 | static void warn_for_collisions_1 (tree, tree, struct tlist *, int); | |
1869 | static struct tlist *new_tlist (struct tlist *, tree, tree); | |
2683ed8d | 1870 | |
235cfbc4 BS |
1871 | /* Create a new struct tlist and fill in its fields. */ |
1872 | static struct tlist * | |
35b1a6fa | 1873 | new_tlist (struct tlist *next, tree t, tree writer) |
235cfbc4 BS |
1874 | { |
1875 | struct tlist *l; | |
5d038c4c | 1876 | l = XOBNEW (&tlist_obstack, struct tlist); |
235cfbc4 BS |
1877 | l->next = next; |
1878 | l->expr = t; | |
1879 | l->writer = writer; | |
1880 | return l; | |
1881 | } | |
1882 | ||
1883 | /* Add duplicates of the nodes found in ADD to the list *TO. If EXCLUDE_WRITER | |
1884 | is nonnull, we ignore any node we find which has a writer equal to it. */ | |
1885 | ||
1886 | static void | |
35b1a6fa | 1887 | add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy) |
235cfbc4 BS |
1888 | { |
1889 | while (add) | |
1890 | { | |
1891 | struct tlist *next = add->next; | |
3f75a254 | 1892 | if (!copy) |
235cfbc4 | 1893 | add->next = *to; |
3f75a254 | 1894 | if (!exclude_writer || add->writer != exclude_writer) |
235cfbc4 BS |
1895 | *to = copy ? new_tlist (*to, add->expr, add->writer) : add; |
1896 | add = next; | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | /* Merge the nodes of ADD into TO. This merging process is done so that for | |
1901 | each variable that already exists in TO, no new node is added; however if | |
1902 | there is a write access recorded in ADD, and an occurrence on TO is only | |
1903 | a read access, then the occurrence in TO will be modified to record the | |
1904 | write. */ | |
2683ed8d BS |
1905 | |
1906 | static void | |
35b1a6fa | 1907 | merge_tlist (struct tlist **to, struct tlist *add, int copy) |
235cfbc4 BS |
1908 | { |
1909 | struct tlist **end = to; | |
1910 | ||
1911 | while (*end) | |
1912 | end = &(*end)->next; | |
1913 | ||
1914 | while (add) | |
1915 | { | |
1916 | int found = 0; | |
1917 | struct tlist *tmp2; | |
1918 | struct tlist *next = add->next; | |
1919 | ||
1920 | for (tmp2 = *to; tmp2; tmp2 = tmp2->next) | |
1921 | if (tmp2->expr == add->expr) | |
1922 | { | |
1923 | found = 1; | |
3f75a254 | 1924 | if (!tmp2->writer) |
235cfbc4 BS |
1925 | tmp2->writer = add->writer; |
1926 | } | |
3f75a254 | 1927 | if (!found) |
235cfbc4 BS |
1928 | { |
1929 | *end = copy ? add : new_tlist (NULL, add->expr, add->writer); | |
1930 | end = &(*end)->next; | |
1931 | *end = 0; | |
1932 | } | |
1933 | add = next; | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | /* WRITTEN is a variable, WRITER is its parent. Warn if any of the variable | |
1938 | references in list LIST conflict with it, excluding reads if ONLY writers | |
1939 | is nonzero. */ | |
1940 | ||
1941 | static void | |
35b1a6fa AJ |
1942 | warn_for_collisions_1 (tree written, tree writer, struct tlist *list, |
1943 | int only_writes) | |
235cfbc4 BS |
1944 | { |
1945 | struct tlist *tmp; | |
1946 | ||
1947 | /* Avoid duplicate warnings. */ | |
1948 | for (tmp = warned_ids; tmp; tmp = tmp->next) | |
1949 | if (tmp->expr == written) | |
1950 | return; | |
1951 | ||
1952 | while (list) | |
1953 | { | |
1954 | if (list->expr == written | |
1955 | && list->writer != writer | |
3f75a254 | 1956 | && (!only_writes || list->writer) |
e3790655 | 1957 | && DECL_NAME (list->expr)) |
235cfbc4 BS |
1958 | { |
1959 | warned_ids = new_tlist (warned_ids, written, NULL_TREE); | |
ca085fd7 MLI |
1960 | warning_at (EXPR_HAS_LOCATION (writer) |
1961 | ? EXPR_LOCATION (writer) : input_location, | |
1962 | OPT_Wsequence_point, "operation on %qE may be undefined", | |
1963 | list->expr); | |
235cfbc4 BS |
1964 | } |
1965 | list = list->next; | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | /* Given a list LIST of references to variables, find whether any of these | |
1970 | can cause conflicts due to missing sequence points. */ | |
1971 | ||
1972 | static void | |
35b1a6fa | 1973 | warn_for_collisions (struct tlist *list) |
235cfbc4 BS |
1974 | { |
1975 | struct tlist *tmp; | |
35b1a6fa | 1976 | |
235cfbc4 BS |
1977 | for (tmp = list; tmp; tmp = tmp->next) |
1978 | { | |
1979 | if (tmp->writer) | |
1980 | warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0); | |
1981 | } | |
1982 | } | |
1983 | ||
684d9f3b | 1984 | /* Return nonzero if X is a tree that can be verified by the sequence point |
235cfbc4 BS |
1985 | warnings. */ |
1986 | static int | |
35b1a6fa | 1987 | warning_candidate_p (tree x) |
2683ed8d | 1988 | { |
235cfbc4 BS |
1989 | return TREE_CODE (x) == VAR_DECL || TREE_CODE (x) == PARM_DECL; |
1990 | } | |
2683ed8d | 1991 | |
235cfbc4 BS |
1992 | /* Walk the tree X, and record accesses to variables. If X is written by the |
1993 | parent tree, WRITER is the parent. | |
1994 | We store accesses in one of the two lists: PBEFORE_SP, and PNO_SP. If this | |
1995 | expression or its only operand forces a sequence point, then everything up | |
1996 | to the sequence point is stored in PBEFORE_SP. Everything else gets stored | |
1997 | in PNO_SP. | |
1998 | Once we return, we will have emitted warnings if any subexpression before | |
1999 | such a sequence point could be undefined. On a higher level, however, the | |
2000 | sequence point may not be relevant, and we'll merge the two lists. | |
2001 | ||
2002 | Example: (b++, a) + b; | |
2003 | The call that processes the COMPOUND_EXPR will store the increment of B | |
2004 | in PBEFORE_SP, and the use of A in PNO_SP. The higher-level call that | |
2005 | processes the PLUS_EXPR will need to merge the two lists so that | |
2006 | eventually, all accesses end up on the same list (and we'll warn about the | |
2007 | unordered subexpressions b++ and b. | |
2008 | ||
2009 | A note on merging. If we modify the former example so that our expression | |
2010 | becomes | |
2011 | (b++, b) + a | |
2012 | care must be taken not simply to add all three expressions into the final | |
2013 | PNO_SP list. The function merge_tlist takes care of that by merging the | |
2014 | before-SP list of the COMPOUND_EXPR into its after-SP list in a special | |
2015 | way, so that no more than one access to B is recorded. */ | |
2683ed8d | 2016 | |
235cfbc4 | 2017 | static void |
35b1a6fa AJ |
2018 | verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp, |
2019 | tree writer) | |
235cfbc4 BS |
2020 | { |
2021 | struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3; | |
2022 | enum tree_code code; | |
6615c446 | 2023 | enum tree_code_class cl; |
2683ed8d | 2024 | |
f9e1917e JM |
2025 | /* X may be NULL if it is the operand of an empty statement expression |
2026 | ({ }). */ | |
2027 | if (x == NULL) | |
2028 | return; | |
2029 | ||
235cfbc4 BS |
2030 | restart: |
2031 | code = TREE_CODE (x); | |
e3a64162 | 2032 | cl = TREE_CODE_CLASS (code); |
2683ed8d | 2033 | |
235cfbc4 | 2034 | if (warning_candidate_p (x)) |
2683ed8d | 2035 | { |
235cfbc4 BS |
2036 | *pno_sp = new_tlist (*pno_sp, x, writer); |
2037 | return; | |
2038 | } | |
2039 | ||
2040 | switch (code) | |
2041 | { | |
52a84e42 BS |
2042 | case CONSTRUCTOR: |
2043 | return; | |
2044 | ||
235cfbc4 BS |
2045 | case COMPOUND_EXPR: |
2046 | case TRUTH_ANDIF_EXPR: | |
2047 | case TRUTH_ORIF_EXPR: | |
2048 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
2049 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
2050 | warn_for_collisions (tmp_nosp); | |
2051 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2052 | merge_tlist (pbefore_sp, tmp_nosp, 0); | |
2053 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE); | |
2054 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2055 | return; | |
2056 | ||
2057 | case COND_EXPR: | |
2058 | tmp_before = tmp_list2 = 0; | |
2059 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE); | |
2060 | warn_for_collisions (tmp_list2); | |
2061 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2062 | merge_tlist (pbefore_sp, tmp_list2, 1); | |
2063 | ||
2064 | tmp_list3 = tmp_nosp = 0; | |
2065 | verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE); | |
2066 | warn_for_collisions (tmp_nosp); | |
2067 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2068 | ||
2069 | tmp_list3 = tmp_list2 = 0; | |
2070 | verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE); | |
2071 | warn_for_collisions (tmp_list2); | |
2072 | merge_tlist (pbefore_sp, tmp_list3, 0); | |
2073 | /* Rather than add both tmp_nosp and tmp_list2, we have to merge the | |
2074 | two first, to avoid warning for (a ? b++ : b++). */ | |
2075 | merge_tlist (&tmp_nosp, tmp_list2, 0); | |
2076 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2077 | return; | |
2078 | ||
2683ed8d BS |
2079 | case PREDECREMENT_EXPR: |
2080 | case PREINCREMENT_EXPR: | |
2081 | case POSTDECREMENT_EXPR: | |
2082 | case POSTINCREMENT_EXPR: | |
235cfbc4 BS |
2083 | verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x); |
2084 | return; | |
2085 | ||
2086 | case MODIFY_EXPR: | |
2087 | tmp_before = tmp_nosp = tmp_list3 = 0; | |
2088 | verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE); | |
2089 | verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x); | |
2090 | /* Expressions inside the LHS are not ordered wrt. the sequence points | |
2091 | in the RHS. Example: | |
2092 | *a = (a++, 2) | |
2093 | Despite the fact that the modification of "a" is in the before_sp | |
2094 | list (tmp_before), it conflicts with the use of "a" in the LHS. | |
2095 | We can handle this by adding the contents of tmp_list3 | |
2096 | to those of tmp_before, and redoing the collision warnings for that | |
2097 | list. */ | |
2098 | add_tlist (&tmp_before, tmp_list3, x, 1); | |
2099 | warn_for_collisions (tmp_before); | |
2100 | /* Exclude the LHS itself here; we first have to merge it into the | |
2101 | tmp_nosp list. This is done to avoid warning for "a = a"; if we | |
2102 | didn't exclude the LHS, we'd get it twice, once as a read and once | |
2103 | as a write. */ | |
2104 | add_tlist (pno_sp, tmp_list3, x, 0); | |
2105 | warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1); | |
2106 | ||
2107 | merge_tlist (pbefore_sp, tmp_before, 0); | |
2108 | if (warning_candidate_p (TREE_OPERAND (x, 0))) | |
2109 | merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0); | |
2110 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1); | |
2111 | return; | |
2683ed8d BS |
2112 | |
2113 | case CALL_EXPR: | |
235cfbc4 BS |
2114 | /* We need to warn about conflicts among arguments and conflicts between |
2115 | args and the function address. Side effects of the function address, | |
2116 | however, are not ordered by the sequence point of the call. */ | |
5039610b SL |
2117 | { |
2118 | call_expr_arg_iterator iter; | |
2119 | tree arg; | |
2120 | tmp_before = tmp_nosp = 0; | |
2121 | verify_tree (CALL_EXPR_FN (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
2122 | FOR_EACH_CALL_EXPR_ARG (arg, iter, x) | |
2123 | { | |
2124 | tmp_list2 = tmp_list3 = 0; | |
2125 | verify_tree (arg, &tmp_list2, &tmp_list3, NULL_TREE); | |
2126 | merge_tlist (&tmp_list3, tmp_list2, 0); | |
2127 | add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0); | |
2128 | } | |
2129 | add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0); | |
2130 | warn_for_collisions (tmp_before); | |
2131 | add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0); | |
2132 | return; | |
2133 | } | |
2683ed8d BS |
2134 | |
2135 | case TREE_LIST: | |
2136 | /* Scan all the list, e.g. indices of multi dimensional array. */ | |
2137 | while (x) | |
2138 | { | |
235cfbc4 BS |
2139 | tmp_before = tmp_nosp = 0; |
2140 | verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE); | |
2141 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
2142 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2683ed8d BS |
2143 | x = TREE_CHAIN (x); |
2144 | } | |
235cfbc4 | 2145 | return; |
2683ed8d | 2146 | |
235cfbc4 BS |
2147 | case SAVE_EXPR: |
2148 | { | |
2149 | struct tlist_cache *t; | |
2150 | for (t = save_expr_cache; t; t = t->next) | |
2151 | if (t->expr == x) | |
2152 | break; | |
2683ed8d | 2153 | |
3f75a254 | 2154 | if (!t) |
2683ed8d | 2155 | { |
5d038c4c | 2156 | t = XOBNEW (&tlist_obstack, struct tlist_cache); |
235cfbc4 BS |
2157 | t->next = save_expr_cache; |
2158 | t->expr = x; | |
2159 | save_expr_cache = t; | |
2160 | ||
2161 | tmp_before = tmp_nosp = 0; | |
2162 | verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE); | |
2163 | warn_for_collisions (tmp_nosp); | |
2164 | ||
2165 | tmp_list3 = 0; | |
2166 | while (tmp_nosp) | |
2167 | { | |
2168 | struct tlist *t = tmp_nosp; | |
2169 | tmp_nosp = t->next; | |
2170 | merge_tlist (&tmp_list3, t, 0); | |
2171 | } | |
2172 | t->cache_before_sp = tmp_before; | |
2173 | t->cache_after_sp = tmp_list3; | |
2683ed8d | 2174 | } |
235cfbc4 BS |
2175 | merge_tlist (pbefore_sp, t->cache_before_sp, 1); |
2176 | add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1); | |
2177 | return; | |
2178 | } | |
2683ed8d | 2179 | |
6615c446 JO |
2180 | default: |
2181 | /* For other expressions, simply recurse on their operands. | |
c22cacf3 | 2182 | Manual tail recursion for unary expressions. |
6615c446 JO |
2183 | Other non-expressions need not be processed. */ |
2184 | if (cl == tcc_unary) | |
2185 | { | |
6615c446 JO |
2186 | x = TREE_OPERAND (x, 0); |
2187 | writer = 0; | |
2188 | goto restart; | |
2189 | } | |
2190 | else if (IS_EXPR_CODE_CLASS (cl)) | |
2191 | { | |
2192 | int lp; | |
5039610b | 2193 | int max = TREE_OPERAND_LENGTH (x); |
6615c446 JO |
2194 | for (lp = 0; lp < max; lp++) |
2195 | { | |
2196 | tmp_before = tmp_nosp = 0; | |
2197 | verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0); | |
2198 | merge_tlist (&tmp_nosp, tmp_before, 0); | |
2199 | add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0); | |
2200 | } | |
2201 | } | |
2202 | return; | |
2683ed8d | 2203 | } |
2683ed8d BS |
2204 | } |
2205 | ||
8d9afc4e | 2206 | /* Try to warn for undefined behavior in EXPR due to missing sequence |
2683ed8d BS |
2207 | points. */ |
2208 | ||
3a5b9284 | 2209 | void |
35b1a6fa | 2210 | verify_sequence_points (tree expr) |
2683ed8d | 2211 | { |
235cfbc4 | 2212 | struct tlist *before_sp = 0, *after_sp = 0; |
2683ed8d | 2213 | |
235cfbc4 BS |
2214 | warned_ids = 0; |
2215 | save_expr_cache = 0; | |
2216 | if (tlist_firstobj == 0) | |
2683ed8d | 2217 | { |
235cfbc4 | 2218 | gcc_obstack_init (&tlist_obstack); |
28dab132 | 2219 | tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0); |
2683ed8d BS |
2220 | } |
2221 | ||
235cfbc4 BS |
2222 | verify_tree (expr, &before_sp, &after_sp, 0); |
2223 | warn_for_collisions (after_sp); | |
2224 | obstack_free (&tlist_obstack, tlist_firstobj); | |
2683ed8d | 2225 | } |
b30f223b RS |
2226 | \f |
2227 | /* Validate the expression after `case' and apply default promotions. */ | |
2228 | ||
a6c0a76c | 2229 | static tree |
35b1a6fa | 2230 | check_case_value (tree value) |
b30f223b RS |
2231 | { |
2232 | if (value == NULL_TREE) | |
2233 | return value; | |
2234 | ||
ed248cf7 JM |
2235 | /* ??? Can we ever get nops here for a valid case value? We |
2236 | shouldn't for C. */ | |
8493738b | 2237 | STRIP_TYPE_NOPS (value); |
56cb9733 MM |
2238 | /* In C++, the following is allowed: |
2239 | ||
2240 | const int i = 3; | |
2241 | switch (...) { case i: ... } | |
2242 | ||
2243 | So, we try to reduce the VALUE to a constant that way. */ | |
37fa72e9 | 2244 | if (c_dialect_cxx ()) |
56cb9733 MM |
2245 | { |
2246 | value = decl_constant_value (value); | |
2247 | STRIP_TYPE_NOPS (value); | |
2248 | value = fold (value); | |
2249 | } | |
b30f223b | 2250 | |
522ddfa2 JM |
2251 | if (TREE_CODE (value) == INTEGER_CST) |
2252 | /* Promote char or short to int. */ | |
2253 | value = perform_integral_promotions (value); | |
2254 | else if (value != error_mark_node) | |
b30f223b RS |
2255 | { |
2256 | error ("case label does not reduce to an integer constant"); | |
2257 | value = error_mark_node; | |
2258 | } | |
b30f223b | 2259 | |
bc690db1 RS |
2260 | constant_expression_warning (value); |
2261 | ||
b30f223b RS |
2262 | return value; |
2263 | } | |
2264 | \f | |
a6c0a76c | 2265 | /* See if the case values LOW and HIGH are in the range of the original |
89dbed81 | 2266 | type (i.e. before the default conversion to int) of the switch testing |
a6c0a76c SB |
2267 | expression. |
2268 | TYPE is the promoted type of the testing expression, and ORIG_TYPE is | |
2a7e31df | 2269 | the type before promoting it. CASE_LOW_P is a pointer to the lower |
a6c0a76c SB |
2270 | bound of the case label, and CASE_HIGH_P is the upper bound or NULL |
2271 | if the case is not a case range. | |
2272 | The caller has to make sure that we are not called with NULL for | |
89dbed81 | 2273 | CASE_LOW_P (i.e. the default case). |
0fa2e4df | 2274 | Returns true if the case label is in range of ORIG_TYPE (saturated or |
a6c0a76c SB |
2275 | untouched) or false if the label is out of range. */ |
2276 | ||
2277 | static bool | |
2278 | check_case_bounds (tree type, tree orig_type, | |
2279 | tree *case_low_p, tree *case_high_p) | |
2280 | { | |
2281 | tree min_value, max_value; | |
2282 | tree case_low = *case_low_p; | |
2283 | tree case_high = case_high_p ? *case_high_p : case_low; | |
2284 | ||
2285 | /* If there was a problem with the original type, do nothing. */ | |
2286 | if (orig_type == error_mark_node) | |
2287 | return true; | |
2288 | ||
2289 | min_value = TYPE_MIN_VALUE (orig_type); | |
2290 | max_value = TYPE_MAX_VALUE (orig_type); | |
2291 | ||
2292 | /* Case label is less than minimum for type. */ | |
2293 | if (tree_int_cst_compare (case_low, min_value) < 0 | |
2294 | && tree_int_cst_compare (case_high, min_value) < 0) | |
2295 | { | |
d4ee4d25 | 2296 | warning (0, "case label value is less than minimum value for type"); |
a6c0a76c SB |
2297 | return false; |
2298 | } | |
9f63daea | 2299 | |
a6c0a76c SB |
2300 | /* Case value is greater than maximum for type. */ |
2301 | if (tree_int_cst_compare (case_low, max_value) > 0 | |
2302 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2303 | { | |
d4ee4d25 | 2304 | warning (0, "case label value exceeds maximum value for type"); |
a6c0a76c SB |
2305 | return false; |
2306 | } | |
2307 | ||
2308 | /* Saturate lower case label value to minimum. */ | |
2309 | if (tree_int_cst_compare (case_high, min_value) >= 0 | |
2310 | && tree_int_cst_compare (case_low, min_value) < 0) | |
2311 | { | |
d4ee4d25 | 2312 | warning (0, "lower value in case label range" |
a6c0a76c SB |
2313 | " less than minimum value for type"); |
2314 | case_low = min_value; | |
2315 | } | |
9f63daea | 2316 | |
a6c0a76c SB |
2317 | /* Saturate upper case label value to maximum. */ |
2318 | if (tree_int_cst_compare (case_low, max_value) <= 0 | |
2319 | && tree_int_cst_compare (case_high, max_value) > 0) | |
2320 | { | |
d4ee4d25 | 2321 | warning (0, "upper value in case label range" |
a6c0a76c SB |
2322 | " exceeds maximum value for type"); |
2323 | case_high = max_value; | |
2324 | } | |
2325 | ||
2326 | if (*case_low_p != case_low) | |
2327 | *case_low_p = convert (type, case_low); | |
2328 | if (case_high_p && *case_high_p != case_high) | |
2329 | *case_high_p = convert (type, case_high); | |
2330 | ||
2331 | return true; | |
2332 | } | |
2333 | \f | |
b30f223b RS |
2334 | /* Return an integer type with BITS bits of precision, |
2335 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */ | |
2336 | ||
2337 | tree | |
35b1a6fa | 2338 | c_common_type_for_size (unsigned int bits, int unsignedp) |
b30f223b | 2339 | { |
a311b52c JM |
2340 | if (bits == TYPE_PRECISION (integer_type_node)) |
2341 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2342 | ||
3fc7e390 | 2343 | if (bits == TYPE_PRECISION (signed_char_type_node)) |
b30f223b RS |
2344 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
2345 | ||
3fc7e390 | 2346 | if (bits == TYPE_PRECISION (short_integer_type_node)) |
b30f223b RS |
2347 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
2348 | ||
3fc7e390 | 2349 | if (bits == TYPE_PRECISION (long_integer_type_node)) |
b30f223b RS |
2350 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
2351 | ||
3fc7e390 | 2352 | if (bits == TYPE_PRECISION (long_long_integer_type_node)) |
b30f223b RS |
2353 | return (unsignedp ? long_long_unsigned_type_node |
2354 | : long_long_integer_type_node); | |
2355 | ||
835f9b4d GRK |
2356 | if (bits == TYPE_PRECISION (widest_integer_literal_type_node)) |
2357 | return (unsignedp ? widest_unsigned_literal_type_node | |
2358 | : widest_integer_literal_type_node); | |
2359 | ||
3fc7e390 RS |
2360 | if (bits <= TYPE_PRECISION (intQI_type_node)) |
2361 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2362 | ||
2363 | if (bits <= TYPE_PRECISION (intHI_type_node)) | |
2364 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2365 | ||
2366 | if (bits <= TYPE_PRECISION (intSI_type_node)) | |
2367 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2368 | ||
2369 | if (bits <= TYPE_PRECISION (intDI_type_node)) | |
2370 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2371 | ||
b30f223b RS |
2372 | return 0; |
2373 | } | |
2374 | ||
ab22c1fa CF |
2375 | /* Return a fixed-point type that has at least IBIT ibits and FBIT fbits |
2376 | that is unsigned if UNSIGNEDP is nonzero, otherwise signed; | |
2377 | and saturating if SATP is nonzero, otherwise not saturating. */ | |
2378 | ||
2379 | tree | |
2380 | c_common_fixed_point_type_for_size (unsigned int ibit, unsigned int fbit, | |
2381 | int unsignedp, int satp) | |
2382 | { | |
2383 | enum machine_mode mode; | |
2384 | if (ibit == 0) | |
2385 | mode = unsignedp ? UQQmode : QQmode; | |
2386 | else | |
2387 | mode = unsignedp ? UHAmode : HAmode; | |
2388 | ||
2389 | for (; mode != VOIDmode; mode = GET_MODE_WIDER_MODE (mode)) | |
2390 | if (GET_MODE_IBIT (mode) >= ibit && GET_MODE_FBIT (mode) >= fbit) | |
2391 | break; | |
2392 | ||
2393 | if (mode == VOIDmode || !targetm.scalar_mode_supported_p (mode)) | |
2394 | { | |
2395 | sorry ("GCC cannot support operators with integer types and " | |
2396 | "fixed-point types that have too many integral and " | |
2397 | "fractional bits together"); | |
2398 | return 0; | |
2399 | } | |
2400 | ||
2401 | return c_common_type_for_mode (mode, satp); | |
2402 | } | |
2403 | ||
d1d3865f ZW |
2404 | /* Used for communication between c_common_type_for_mode and |
2405 | c_register_builtin_type. */ | |
2406 | static GTY(()) tree registered_builtin_types; | |
2407 | ||
b30f223b RS |
2408 | /* Return a data type that has machine mode MODE. |
2409 | If the mode is an integer, | |
ab22c1fa CF |
2410 | then UNSIGNEDP selects between signed and unsigned types. |
2411 | If the mode is a fixed-point mode, | |
2412 | then UNSIGNEDP selects between saturating and nonsaturating types. */ | |
b30f223b RS |
2413 | |
2414 | tree | |
35b1a6fa | 2415 | c_common_type_for_mode (enum machine_mode mode, int unsignedp) |
b30f223b | 2416 | { |
d1d3865f ZW |
2417 | tree t; |
2418 | ||
a311b52c JM |
2419 | if (mode == TYPE_MODE (integer_type_node)) |
2420 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2421 | ||
b30f223b RS |
2422 | if (mode == TYPE_MODE (signed_char_type_node)) |
2423 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2424 | ||
2425 | if (mode == TYPE_MODE (short_integer_type_node)) | |
2426 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2427 | ||
b30f223b RS |
2428 | if (mode == TYPE_MODE (long_integer_type_node)) |
2429 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2430 | ||
2431 | if (mode == TYPE_MODE (long_long_integer_type_node)) | |
2432 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2433 | ||
835f9b4d | 2434 | if (mode == TYPE_MODE (widest_integer_literal_type_node)) |
d125d268 | 2435 | return unsignedp ? widest_unsigned_literal_type_node |
6de9cd9a | 2436 | : widest_integer_literal_type_node; |
835f9b4d | 2437 | |
0afeef64 | 2438 | if (mode == QImode) |
3fc7e390 RS |
2439 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
2440 | ||
0afeef64 | 2441 | if (mode == HImode) |
3fc7e390 RS |
2442 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
2443 | ||
0afeef64 | 2444 | if (mode == SImode) |
3fc7e390 RS |
2445 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
2446 | ||
0afeef64 | 2447 | if (mode == DImode) |
3fc7e390 RS |
2448 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
2449 | ||
21a9616b | 2450 | #if HOST_BITS_PER_WIDE_INT >= 64 |
a6d7e156 JL |
2451 | if (mode == TYPE_MODE (intTI_type_node)) |
2452 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
21a9616b | 2453 | #endif |
a6d7e156 | 2454 | |
b30f223b RS |
2455 | if (mode == TYPE_MODE (float_type_node)) |
2456 | return float_type_node; | |
2457 | ||
2458 | if (mode == TYPE_MODE (double_type_node)) | |
2459 | return double_type_node; | |
2460 | ||
2461 | if (mode == TYPE_MODE (long_double_type_node)) | |
2462 | return long_double_type_node; | |
2463 | ||
ff42324e NS |
2464 | if (mode == TYPE_MODE (void_type_node)) |
2465 | return void_type_node; | |
9f63daea | 2466 | |
b30f223b | 2467 | if (mode == TYPE_MODE (build_pointer_type (char_type_node))) |
19b3ffbc DD |
2468 | return (unsignedp |
2469 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2470 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b RS |
2471 | |
2472 | if (mode == TYPE_MODE (build_pointer_type (integer_type_node))) | |
19b3ffbc DD |
2473 | return (unsignedp |
2474 | ? make_unsigned_type (GET_MODE_PRECISION (mode)) | |
2475 | : make_signed_type (GET_MODE_PRECISION (mode))); | |
b30f223b | 2476 | |
7e7e470f RH |
2477 | if (COMPLEX_MODE_P (mode)) |
2478 | { | |
2479 | enum machine_mode inner_mode; | |
2480 | tree inner_type; | |
2481 | ||
2482 | if (mode == TYPE_MODE (complex_float_type_node)) | |
2483 | return complex_float_type_node; | |
2484 | if (mode == TYPE_MODE (complex_double_type_node)) | |
2485 | return complex_double_type_node; | |
2486 | if (mode == TYPE_MODE (complex_long_double_type_node)) | |
2487 | return complex_long_double_type_node; | |
2488 | ||
2489 | if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp) | |
2490 | return complex_integer_type_node; | |
2491 | ||
2492 | inner_mode = GET_MODE_INNER (mode); | |
2493 | inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2494 | if (inner_type != NULL_TREE) | |
2495 | return build_complex_type (inner_type); | |
2496 | } | |
2497 | else if (VECTOR_MODE_P (mode)) | |
4a5eab38 PB |
2498 | { |
2499 | enum machine_mode inner_mode = GET_MODE_INNER (mode); | |
2500 | tree inner_type = c_common_type_for_mode (inner_mode, unsignedp); | |
2501 | if (inner_type != NULL_TREE) | |
2502 | return build_vector_type_for_mode (inner_type, mode); | |
0afeef64 | 2503 | } |
4061f623 | 2504 | |
9a8ce21f JG |
2505 | if (mode == TYPE_MODE (dfloat32_type_node)) |
2506 | return dfloat32_type_node; | |
2507 | if (mode == TYPE_MODE (dfloat64_type_node)) | |
2508 | return dfloat64_type_node; | |
2509 | if (mode == TYPE_MODE (dfloat128_type_node)) | |
2510 | return dfloat128_type_node; | |
2511 | ||
ab22c1fa CF |
2512 | if (ALL_SCALAR_FIXED_POINT_MODE_P (mode)) |
2513 | { | |
2514 | if (mode == TYPE_MODE (short_fract_type_node)) | |
2515 | return unsignedp ? sat_short_fract_type_node : short_fract_type_node; | |
2516 | if (mode == TYPE_MODE (fract_type_node)) | |
2517 | return unsignedp ? sat_fract_type_node : fract_type_node; | |
2518 | if (mode == TYPE_MODE (long_fract_type_node)) | |
2519 | return unsignedp ? sat_long_fract_type_node : long_fract_type_node; | |
2520 | if (mode == TYPE_MODE (long_long_fract_type_node)) | |
2521 | return unsignedp ? sat_long_long_fract_type_node | |
2522 | : long_long_fract_type_node; | |
2523 | ||
2524 | if (mode == TYPE_MODE (unsigned_short_fract_type_node)) | |
2525 | return unsignedp ? sat_unsigned_short_fract_type_node | |
2526 | : unsigned_short_fract_type_node; | |
2527 | if (mode == TYPE_MODE (unsigned_fract_type_node)) | |
2528 | return unsignedp ? sat_unsigned_fract_type_node | |
2529 | : unsigned_fract_type_node; | |
2530 | if (mode == TYPE_MODE (unsigned_long_fract_type_node)) | |
2531 | return unsignedp ? sat_unsigned_long_fract_type_node | |
2532 | : unsigned_long_fract_type_node; | |
2533 | if (mode == TYPE_MODE (unsigned_long_long_fract_type_node)) | |
2534 | return unsignedp ? sat_unsigned_long_long_fract_type_node | |
2535 | : unsigned_long_long_fract_type_node; | |
2536 | ||
2537 | if (mode == TYPE_MODE (short_accum_type_node)) | |
2538 | return unsignedp ? sat_short_accum_type_node : short_accum_type_node; | |
2539 | if (mode == TYPE_MODE (accum_type_node)) | |
2540 | return unsignedp ? sat_accum_type_node : accum_type_node; | |
2541 | if (mode == TYPE_MODE (long_accum_type_node)) | |
2542 | return unsignedp ? sat_long_accum_type_node : long_accum_type_node; | |
2543 | if (mode == TYPE_MODE (long_long_accum_type_node)) | |
2544 | return unsignedp ? sat_long_long_accum_type_node | |
2545 | : long_long_accum_type_node; | |
2546 | ||
2547 | if (mode == TYPE_MODE (unsigned_short_accum_type_node)) | |
2548 | return unsignedp ? sat_unsigned_short_accum_type_node | |
2549 | : unsigned_short_accum_type_node; | |
2550 | if (mode == TYPE_MODE (unsigned_accum_type_node)) | |
2551 | return unsignedp ? sat_unsigned_accum_type_node | |
2552 | : unsigned_accum_type_node; | |
2553 | if (mode == TYPE_MODE (unsigned_long_accum_type_node)) | |
2554 | return unsignedp ? sat_unsigned_long_accum_type_node | |
2555 | : unsigned_long_accum_type_node; | |
2556 | if (mode == TYPE_MODE (unsigned_long_long_accum_type_node)) | |
2557 | return unsignedp ? sat_unsigned_long_long_accum_type_node | |
2558 | : unsigned_long_long_accum_type_node; | |
2559 | ||
2560 | if (mode == QQmode) | |
2561 | return unsignedp ? sat_qq_type_node : qq_type_node; | |
2562 | if (mode == HQmode) | |
2563 | return unsignedp ? sat_hq_type_node : hq_type_node; | |
2564 | if (mode == SQmode) | |
2565 | return unsignedp ? sat_sq_type_node : sq_type_node; | |
2566 | if (mode == DQmode) | |
2567 | return unsignedp ? sat_dq_type_node : dq_type_node; | |
2568 | if (mode == TQmode) | |
2569 | return unsignedp ? sat_tq_type_node : tq_type_node; | |
2570 | ||
2571 | if (mode == UQQmode) | |
2572 | return unsignedp ? sat_uqq_type_node : uqq_type_node; | |
2573 | if (mode == UHQmode) | |
2574 | return unsignedp ? sat_uhq_type_node : uhq_type_node; | |
2575 | if (mode == USQmode) | |
2576 | return unsignedp ? sat_usq_type_node : usq_type_node; | |
2577 | if (mode == UDQmode) | |
2578 | return unsignedp ? sat_udq_type_node : udq_type_node; | |
2579 | if (mode == UTQmode) | |
2580 | return unsignedp ? sat_utq_type_node : utq_type_node; | |
2581 | ||
2582 | if (mode == HAmode) | |
2583 | return unsignedp ? sat_ha_type_node : ha_type_node; | |
2584 | if (mode == SAmode) | |
2585 | return unsignedp ? sat_sa_type_node : sa_type_node; | |
2586 | if (mode == DAmode) | |
2587 | return unsignedp ? sat_da_type_node : da_type_node; | |
2588 | if (mode == TAmode) | |
2589 | return unsignedp ? sat_ta_type_node : ta_type_node; | |
2590 | ||
2591 | if (mode == UHAmode) | |
2592 | return unsignedp ? sat_uha_type_node : uha_type_node; | |
2593 | if (mode == USAmode) | |
2594 | return unsignedp ? sat_usa_type_node : usa_type_node; | |
2595 | if (mode == UDAmode) | |
2596 | return unsignedp ? sat_uda_type_node : uda_type_node; | |
2597 | if (mode == UTAmode) | |
2598 | return unsignedp ? sat_uta_type_node : uta_type_node; | |
2599 | } | |
2600 | ||
d1d3865f ZW |
2601 | for (t = registered_builtin_types; t; t = TREE_CHAIN (t)) |
2602 | if (TYPE_MODE (TREE_VALUE (t)) == mode) | |
2603 | return TREE_VALUE (t); | |
2604 | ||
b30f223b RS |
2605 | return 0; |
2606 | } | |
693a6128 | 2607 | |
12753674 RE |
2608 | tree |
2609 | c_common_unsigned_type (tree type) | |
2610 | { | |
2611 | return c_common_signed_or_unsigned_type (1, type); | |
2612 | } | |
2613 | ||
693a6128 GRK |
2614 | /* Return a signed type the same as TYPE in other respects. */ |
2615 | ||
2616 | tree | |
35b1a6fa | 2617 | c_common_signed_type (tree type) |
693a6128 | 2618 | { |
ceef8ce4 | 2619 | return c_common_signed_or_unsigned_type (0, type); |
693a6128 GRK |
2620 | } |
2621 | ||
2622 | /* Return a type the same as TYPE except unsigned or | |
2623 | signed according to UNSIGNEDP. */ | |
2624 | ||
2625 | tree | |
35b1a6fa | 2626 | c_common_signed_or_unsigned_type (int unsignedp, tree type) |
693a6128 | 2627 | { |
c74a03d2 | 2628 | tree type1; |
693a6128 | 2629 | |
c74a03d2 RAE |
2630 | /* This block of code emulates the behavior of the old |
2631 | c_common_unsigned_type. In particular, it returns | |
2632 | long_unsigned_type_node if passed a long, even when a int would | |
2633 | have the same size. This is necessary for warnings to work | |
2634 | correctly in archs where sizeof(int) == sizeof(long) */ | |
2635 | ||
2636 | type1 = TYPE_MAIN_VARIANT (type); | |
2637 | if (type1 == signed_char_type_node || type1 == char_type_node || type1 == unsigned_char_type_node) | |
2638 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2639 | if (type1 == integer_type_node || type1 == unsigned_type_node) | |
2640 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2641 | if (type1 == short_integer_type_node || type1 == short_unsigned_type_node) | |
2642 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2643 | if (type1 == long_integer_type_node || type1 == long_unsigned_type_node) | |
2644 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2645 | if (type1 == long_long_integer_type_node || type1 == long_long_unsigned_type_node) | |
2646 | return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node; | |
2647 | if (type1 == widest_integer_literal_type_node || type1 == widest_unsigned_literal_type_node) | |
2648 | return unsignedp ? widest_unsigned_literal_type_node : widest_integer_literal_type_node; | |
2649 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
2650 | if (type1 == intTI_type_node || type1 == unsigned_intTI_type_node) | |
2651 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; | |
2652 | #endif | |
2653 | if (type1 == intDI_type_node || type1 == unsigned_intDI_type_node) | |
2654 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; | |
2655 | if (type1 == intSI_type_node || type1 == unsigned_intSI_type_node) | |
2656 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; | |
2657 | if (type1 == intHI_type_node || type1 == unsigned_intHI_type_node) | |
2658 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; | |
2659 | if (type1 == intQI_type_node || type1 == unsigned_intQI_type_node) | |
2660 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; | |
2661 | ||
70d3fcab AH |
2662 | #define C_COMMON_FIXED_TYPES(NAME) \ |
2663 | if (type1 == short_ ## NAME ## _type_node \ | |
2664 | || type1 == unsigned_short_ ## NAME ## _type_node) \ | |
2665 | return unsignedp ? unsigned_short_ ## NAME ## _type_node \ | |
2666 | : short_ ## NAME ## _type_node; \ | |
2667 | if (type1 == NAME ## _type_node \ | |
2668 | || type1 == unsigned_ ## NAME ## _type_node) \ | |
2669 | return unsignedp ? unsigned_ ## NAME ## _type_node \ | |
2670 | : NAME ## _type_node; \ | |
2671 | if (type1 == long_ ## NAME ## _type_node \ | |
2672 | || type1 == unsigned_long_ ## NAME ## _type_node) \ | |
2673 | return unsignedp ? unsigned_long_ ## NAME ## _type_node \ | |
2674 | : long_ ## NAME ## _type_node; \ | |
2675 | if (type1 == long_long_ ## NAME ## _type_node \ | |
2676 | || type1 == unsigned_long_long_ ## NAME ## _type_node) \ | |
2677 | return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \ | |
2678 | : long_long_ ## NAME ## _type_node; | |
2679 | ||
2680 | #define C_COMMON_FIXED_MODE_TYPES(NAME) \ | |
2681 | if (type1 == NAME ## _type_node \ | |
2682 | || type1 == u ## NAME ## _type_node) \ | |
2683 | return unsignedp ? u ## NAME ## _type_node \ | |
2684 | : NAME ## _type_node; | |
2685 | ||
2686 | #define C_COMMON_FIXED_TYPES_SAT(NAME) \ | |
2687 | if (type1 == sat_ ## short_ ## NAME ## _type_node \ | |
2688 | || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \ | |
2689 | return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \ | |
2690 | : sat_ ## short_ ## NAME ## _type_node; \ | |
2691 | if (type1 == sat_ ## NAME ## _type_node \ | |
2692 | || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \ | |
2693 | return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \ | |
2694 | : sat_ ## NAME ## _type_node; \ | |
2695 | if (type1 == sat_ ## long_ ## NAME ## _type_node \ | |
2696 | || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \ | |
2697 | return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \ | |
2698 | : sat_ ## long_ ## NAME ## _type_node; \ | |
2699 | if (type1 == sat_ ## long_long_ ## NAME ## _type_node \ | |
2700 | || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \ | |
2701 | return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \ | |
2702 | : sat_ ## long_long_ ## NAME ## _type_node; | |
2703 | ||
2704 | #define C_COMMON_FIXED_MODE_TYPES_SAT(NAME) \ | |
2705 | if (type1 == sat_ ## NAME ## _type_node \ | |
2706 | || type1 == sat_ ## u ## NAME ## _type_node) \ | |
2707 | return unsignedp ? sat_ ## u ## NAME ## _type_node \ | |
2708 | : sat_ ## NAME ## _type_node; | |
2709 | ||
2710 | C_COMMON_FIXED_TYPES (fract); | |
2711 | C_COMMON_FIXED_TYPES_SAT (fract); | |
2712 | C_COMMON_FIXED_TYPES (accum); | |
2713 | C_COMMON_FIXED_TYPES_SAT (accum); | |
2714 | ||
2715 | C_COMMON_FIXED_MODE_TYPES (qq); | |
2716 | C_COMMON_FIXED_MODE_TYPES (hq); | |
2717 | C_COMMON_FIXED_MODE_TYPES (sq); | |
2718 | C_COMMON_FIXED_MODE_TYPES (dq); | |
2719 | C_COMMON_FIXED_MODE_TYPES (tq); | |
2720 | C_COMMON_FIXED_MODE_TYPES_SAT (qq); | |
2721 | C_COMMON_FIXED_MODE_TYPES_SAT (hq); | |
2722 | C_COMMON_FIXED_MODE_TYPES_SAT (sq); | |
2723 | C_COMMON_FIXED_MODE_TYPES_SAT (dq); | |
2724 | C_COMMON_FIXED_MODE_TYPES_SAT (tq); | |
2725 | C_COMMON_FIXED_MODE_TYPES (ha); | |
2726 | C_COMMON_FIXED_MODE_TYPES (sa); | |
2727 | C_COMMON_FIXED_MODE_TYPES (da); | |
2728 | C_COMMON_FIXED_MODE_TYPES (ta); | |
2729 | C_COMMON_FIXED_MODE_TYPES_SAT (ha); | |
2730 | C_COMMON_FIXED_MODE_TYPES_SAT (sa); | |
2731 | C_COMMON_FIXED_MODE_TYPES_SAT (da); | |
2732 | C_COMMON_FIXED_MODE_TYPES_SAT (ta); | |
ab22c1fa | 2733 | |
bc15d0ef JM |
2734 | /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not |
2735 | the precision; they have precision set to match their range, but | |
2736 | may use a wider mode to match an ABI. If we change modes, we may | |
2737 | wind up with bad conversions. For INTEGER_TYPEs in C, must check | |
2738 | the precision as well, so as to yield correct results for | |
2739 | bit-field types. C++ does not have these separate bit-field | |
2740 | types, and producing a signed or unsigned variant of an | |
2741 | ENUMERAL_TYPE may cause other problems as well. */ | |
2742 | ||
1e204133 RAE |
2743 | if (!INTEGRAL_TYPE_P (type) |
2744 | || TYPE_UNSIGNED (type) == unsignedp) | |
2745 | return type; | |
2746 | ||
bc15d0ef JM |
2747 | #define TYPE_OK(node) \ |
2748 | (TYPE_MODE (type) == TYPE_MODE (node) \ | |
2749 | && (c_dialect_cxx () || TYPE_PRECISION (type) == TYPE_PRECISION (node))) | |
2750 | if (TYPE_OK (signed_char_type_node)) | |
693a6128 | 2751 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; |
bc15d0ef | 2752 | if (TYPE_OK (integer_type_node)) |
693a6128 | 2753 | return unsignedp ? unsigned_type_node : integer_type_node; |
bc15d0ef | 2754 | if (TYPE_OK (short_integer_type_node)) |
693a6128 | 2755 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; |
bc15d0ef | 2756 | if (TYPE_OK (long_integer_type_node)) |
693a6128 | 2757 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; |
bc15d0ef | 2758 | if (TYPE_OK (long_long_integer_type_node)) |
693a6128 GRK |
2759 | return (unsignedp ? long_long_unsigned_type_node |
2760 | : long_long_integer_type_node); | |
bc15d0ef | 2761 | if (TYPE_OK (widest_integer_literal_type_node)) |
693a6128 GRK |
2762 | return (unsignedp ? widest_unsigned_literal_type_node |
2763 | : widest_integer_literal_type_node); | |
4a063bec RH |
2764 | |
2765 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
bc15d0ef | 2766 | if (TYPE_OK (intTI_type_node)) |
4a063bec RH |
2767 | return unsignedp ? unsigned_intTI_type_node : intTI_type_node; |
2768 | #endif | |
bc15d0ef | 2769 | if (TYPE_OK (intDI_type_node)) |
4a063bec | 2770 | return unsignedp ? unsigned_intDI_type_node : intDI_type_node; |
bc15d0ef | 2771 | if (TYPE_OK (intSI_type_node)) |
4a063bec | 2772 | return unsignedp ? unsigned_intSI_type_node : intSI_type_node; |
bc15d0ef | 2773 | if (TYPE_OK (intHI_type_node)) |
4a063bec | 2774 | return unsignedp ? unsigned_intHI_type_node : intHI_type_node; |
bc15d0ef | 2775 | if (TYPE_OK (intQI_type_node)) |
4a063bec | 2776 | return unsignedp ? unsigned_intQI_type_node : intQI_type_node; |
bc15d0ef | 2777 | #undef TYPE_OK |
4a063bec | 2778 | |
bc15d0ef JM |
2779 | if (c_dialect_cxx ()) |
2780 | return type; | |
2781 | else | |
2782 | return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp); | |
693a6128 | 2783 | } |
9649812a | 2784 | |
38a4afee MM |
2785 | /* Build a bit-field integer type for the given WIDTH and UNSIGNEDP. */ |
2786 | ||
2787 | tree | |
2788 | c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) | |
2789 | { | |
2790 | /* Extended integer types of the same width as a standard type have | |
2791 | lesser rank, so those of the same width as int promote to int or | |
2792 | unsigned int and are valid for printf formats expecting int or | |
2793 | unsigned int. To avoid such special cases, avoid creating | |
2794 | extended integer types for bit-fields if a standard integer type | |
2795 | is available. */ | |
2796 | if (width == TYPE_PRECISION (integer_type_node)) | |
2797 | return unsignedp ? unsigned_type_node : integer_type_node; | |
2798 | if (width == TYPE_PRECISION (signed_char_type_node)) | |
2799 | return unsignedp ? unsigned_char_type_node : signed_char_type_node; | |
2800 | if (width == TYPE_PRECISION (short_integer_type_node)) | |
2801 | return unsignedp ? short_unsigned_type_node : short_integer_type_node; | |
2802 | if (width == TYPE_PRECISION (long_integer_type_node)) | |
2803 | return unsignedp ? long_unsigned_type_node : long_integer_type_node; | |
2804 | if (width == TYPE_PRECISION (long_long_integer_type_node)) | |
2805 | return (unsignedp ? long_long_unsigned_type_node | |
2806 | : long_long_integer_type_node); | |
2807 | return build_nonstandard_integer_type (width, unsignedp); | |
2808 | } | |
2809 | ||
9649812a MM |
2810 | /* The C version of the register_builtin_type langhook. */ |
2811 | ||
2812 | void | |
2813 | c_register_builtin_type (tree type, const char* name) | |
2814 | { | |
2815 | tree decl; | |
2816 | ||
2817 | decl = build_decl (TYPE_DECL, get_identifier (name), type); | |
2818 | DECL_ARTIFICIAL (decl) = 1; | |
2819 | if (!TYPE_NAME (type)) | |
2820 | TYPE_NAME (type) = decl; | |
2821 | pushdecl (decl); | |
d1d3865f ZW |
2822 | |
2823 | registered_builtin_types = tree_cons (0, type, registered_builtin_types); | |
9649812a MM |
2824 | } |
2825 | ||
b30f223b | 2826 | \f |
6acfe908 JM |
2827 | /* Return the minimum number of bits needed to represent VALUE in a |
2828 | signed or unsigned type, UNSIGNEDP says which. */ | |
2829 | ||
05bccae2 | 2830 | unsigned int |
35b1a6fa | 2831 | min_precision (tree value, int unsignedp) |
6acfe908 JM |
2832 | { |
2833 | int log; | |
2834 | ||
2835 | /* If the value is negative, compute its negative minus 1. The latter | |
2836 | adjustment is because the absolute value of the largest negative value | |
2837 | is one larger than the largest positive value. This is equivalent to | |
2838 | a bit-wise negation, so use that operation instead. */ | |
2839 | ||
2840 | if (tree_int_cst_sgn (value) < 0) | |
987b67bc | 2841 | value = fold_build1 (BIT_NOT_EXPR, TREE_TYPE (value), value); |
6acfe908 JM |
2842 | |
2843 | /* Return the number of bits needed, taking into account the fact | |
2844 | that we need one more bit for a signed than unsigned type. */ | |
2845 | ||
2846 | if (integer_zerop (value)) | |
2847 | log = 0; | |
6acfe908 | 2848 | else |
05bccae2 | 2849 | log = tree_floor_log2 (value); |
6acfe908 | 2850 | |
3f75a254 | 2851 | return log + 1 + !unsignedp; |
6acfe908 JM |
2852 | } |
2853 | \f | |
78ef5b89 | 2854 | /* Print an error message for invalid operands to arith operation |
2c751309 | 2855 | CODE with TYPE0 for operand 0, and TYPE1 for operand 1. */ |
b30f223b RS |
2856 | |
2857 | void | |
2c751309 | 2858 | binary_op_error (enum tree_code code, tree type0, tree type1) |
b30f223b | 2859 | { |
b3694847 | 2860 | const char *opname; |
89c78d7d | 2861 | |
b30f223b RS |
2862 | switch (code) |
2863 | { | |
b30f223b RS |
2864 | case PLUS_EXPR: |
2865 | opname = "+"; break; | |
2866 | case MINUS_EXPR: | |
2867 | opname = "-"; break; | |
2868 | case MULT_EXPR: | |
2869 | opname = "*"; break; | |
2870 | case MAX_EXPR: | |
2871 | opname = "max"; break; | |
2872 | case MIN_EXPR: | |
2873 | opname = "min"; break; | |
2874 | case EQ_EXPR: | |
2875 | opname = "=="; break; | |
2876 | case NE_EXPR: | |
2877 | opname = "!="; break; | |
2878 | case LE_EXPR: | |
2879 | opname = "<="; break; | |
2880 | case GE_EXPR: | |
2881 | opname = ">="; break; | |
2882 | case LT_EXPR: | |
2883 | opname = "<"; break; | |
2884 | case GT_EXPR: | |
2885 | opname = ">"; break; | |
2886 | case LSHIFT_EXPR: | |
2887 | opname = "<<"; break; | |
2888 | case RSHIFT_EXPR: | |
2889 | opname = ">>"; break; | |
2890 | case TRUNC_MOD_EXPR: | |
047de90b | 2891 | case FLOOR_MOD_EXPR: |
b30f223b RS |
2892 | opname = "%"; break; |
2893 | case TRUNC_DIV_EXPR: | |
047de90b | 2894 | case FLOOR_DIV_EXPR: |
b30f223b RS |
2895 | opname = "/"; break; |
2896 | case BIT_AND_EXPR: | |
2897 | opname = "&"; break; | |
2898 | case BIT_IOR_EXPR: | |
2899 | opname = "|"; break; | |
2900 | case TRUTH_ANDIF_EXPR: | |
2901 | opname = "&&"; break; | |
2902 | case TRUTH_ORIF_EXPR: | |
2903 | opname = "||"; break; | |
2904 | case BIT_XOR_EXPR: | |
2905 | opname = "^"; break; | |
6d819282 | 2906 | default: |
37b2f290 | 2907 | gcc_unreachable (); |
b30f223b | 2908 | } |
2c751309 DB |
2909 | error ("invalid operands to binary %s (have %qT and %qT)", opname, |
2910 | type0, type1); | |
b30f223b RS |
2911 | } |
2912 | \f | |
2913 | /* Subroutine of build_binary_op, used for comparison operations. | |
2914 | See if the operands have both been converted from subword integer types | |
2915 | and, if so, perhaps change them both back to their original type. | |
94dccd9d RS |
2916 | This function is also responsible for converting the two operands |
2917 | to the proper common type for comparison. | |
b30f223b RS |
2918 | |
2919 | The arguments of this function are all pointers to local variables | |
2920 | of build_binary_op: OP0_PTR is &OP0, OP1_PTR is &OP1, | |
2921 | RESTYPE_PTR is &RESULT_TYPE and RESCODE_PTR is &RESULTCODE. | |
2922 | ||
2923 | If this function returns nonzero, it means that the comparison has | |
2924 | a constant value. What this function returns is an expression for | |
2925 | that value. */ | |
2926 | ||
2927 | tree | |
35b1a6fa AJ |
2928 | shorten_compare (tree *op0_ptr, tree *op1_ptr, tree *restype_ptr, |
2929 | enum tree_code *rescode_ptr) | |
b30f223b | 2930 | { |
b3694847 | 2931 | tree type; |
b30f223b RS |
2932 | tree op0 = *op0_ptr; |
2933 | tree op1 = *op1_ptr; | |
2934 | int unsignedp0, unsignedp1; | |
2935 | int real1, real2; | |
2936 | tree primop0, primop1; | |
2937 | enum tree_code code = *rescode_ptr; | |
2938 | ||
2939 | /* Throw away any conversions to wider types | |
2940 | already present in the operands. */ | |
2941 | ||
2942 | primop0 = get_narrower (op0, &unsignedp0); | |
2943 | primop1 = get_narrower (op1, &unsignedp1); | |
2944 | ||
2945 | /* Handle the case that OP0 does not *contain* a conversion | |
2946 | but it *requires* conversion to FINAL_TYPE. */ | |
2947 | ||
2948 | if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr) | |
8df83eae | 2949 | unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0)); |
b30f223b | 2950 | if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr) |
8df83eae | 2951 | unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1)); |
b30f223b RS |
2952 | |
2953 | /* If one of the operands must be floated, we cannot optimize. */ | |
2954 | real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE; | |
2955 | real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE; | |
2956 | ||
2957 | /* If first arg is constant, swap the args (changing operation | |
5af6001b RK |
2958 | so value is preserved), for canonicalization. Don't do this if |
2959 | the second arg is 0. */ | |
b30f223b | 2960 | |
5af6001b | 2961 | if (TREE_CONSTANT (primop0) |
ab22c1fa CF |
2962 | && !integer_zerop (primop1) && !real_zerop (primop1) |
2963 | && !fixed_zerop (primop1)) | |
b30f223b | 2964 | { |
b3694847 SS |
2965 | tree tem = primop0; |
2966 | int temi = unsignedp0; | |
b30f223b RS |
2967 | primop0 = primop1; |
2968 | primop1 = tem; | |
2969 | tem = op0; | |
2970 | op0 = op1; | |
2971 | op1 = tem; | |
2972 | *op0_ptr = op0; | |
2973 | *op1_ptr = op1; | |
2974 | unsignedp0 = unsignedp1; | |
2975 | unsignedp1 = temi; | |
2976 | temi = real1; | |
2977 | real1 = real2; | |
2978 | real2 = temi; | |
2979 | ||
2980 | switch (code) | |
2981 | { | |
2982 | case LT_EXPR: | |
2983 | code = GT_EXPR; | |
2984 | break; | |
2985 | case GT_EXPR: | |
2986 | code = LT_EXPR; | |
2987 | break; | |
2988 | case LE_EXPR: | |
2989 | code = GE_EXPR; | |
2990 | break; | |
2991 | case GE_EXPR: | |
2992 | code = LE_EXPR; | |
2993 | break; | |
6d819282 MK |
2994 | default: |
2995 | break; | |
b30f223b RS |
2996 | } |
2997 | *rescode_ptr = code; | |
2998 | } | |
2999 | ||
3000 | /* If comparing an integer against a constant more bits wide, | |
3001 | maybe we can deduce a value of 1 or 0 independent of the data. | |
3002 | Or else truncate the constant now | |
3003 | rather than extend the variable at run time. | |
3004 | ||
3005 | This is only interesting if the constant is the wider arg. | |
3006 | Also, it is not safe if the constant is unsigned and the | |
3007 | variable arg is signed, since in this case the variable | |
3008 | would be sign-extended and then regarded as unsigned. | |
3009 | Our technique fails in this case because the lowest/highest | |
3010 | possible unsigned results don't follow naturally from the | |
3011 | lowest/highest possible values of the variable operand. | |
3012 | For just EQ_EXPR and NE_EXPR there is another technique that | |
3013 | could be used: see if the constant can be faithfully represented | |
3014 | in the other operand's type, by truncating it and reextending it | |
3015 | and see if that preserves the constant's value. */ | |
3016 | ||
3017 | if (!real1 && !real2 | |
ab22c1fa | 3018 | && TREE_CODE (TREE_TYPE (primop0)) != FIXED_POINT_TYPE |
b30f223b RS |
3019 | && TREE_CODE (primop1) == INTEGER_CST |
3020 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)) | |
3021 | { | |
3022 | int min_gt, max_gt, min_lt, max_lt; | |
3023 | tree maxval, minval; | |
3024 | /* 1 if comparison is nominally unsigned. */ | |
8df83eae | 3025 | int unsignedp = TYPE_UNSIGNED (*restype_ptr); |
b30f223b RS |
3026 | tree val; |
3027 | ||
ceef8ce4 NB |
3028 | type = c_common_signed_or_unsigned_type (unsignedp0, |
3029 | TREE_TYPE (primop0)); | |
8bbd5685 | 3030 | |
b30f223b RS |
3031 | maxval = TYPE_MAX_VALUE (type); |
3032 | minval = TYPE_MIN_VALUE (type); | |
3033 | ||
3034 | if (unsignedp && !unsignedp0) | |
ceef8ce4 | 3035 | *restype_ptr = c_common_signed_type (*restype_ptr); |
b30f223b RS |
3036 | |
3037 | if (TREE_TYPE (primop1) != *restype_ptr) | |
fae1b38d | 3038 | { |
af9c6659 NS |
3039 | /* Convert primop1 to target type, but do not introduce |
3040 | additional overflow. We know primop1 is an int_cst. */ | |
b8fca551 RG |
3041 | primop1 = force_fit_type_double (*restype_ptr, |
3042 | TREE_INT_CST_LOW (primop1), | |
3043 | TREE_INT_CST_HIGH (primop1), 0, | |
d95787e6 | 3044 | TREE_OVERFLOW (primop1)); |
fae1b38d | 3045 | } |
b30f223b RS |
3046 | if (type != *restype_ptr) |
3047 | { | |
3048 | minval = convert (*restype_ptr, minval); | |
3049 | maxval = convert (*restype_ptr, maxval); | |
3050 | } | |
3051 | ||
3052 | if (unsignedp && unsignedp0) | |
3053 | { | |
3054 | min_gt = INT_CST_LT_UNSIGNED (primop1, minval); | |
3055 | max_gt = INT_CST_LT_UNSIGNED (primop1, maxval); | |
3056 | min_lt = INT_CST_LT_UNSIGNED (minval, primop1); | |
3057 | max_lt = INT_CST_LT_UNSIGNED (maxval, primop1); | |
3058 | } | |
3059 | else | |
3060 | { | |
3061 | min_gt = INT_CST_LT (primop1, minval); | |
3062 | max_gt = INT_CST_LT (primop1, maxval); | |
3063 | min_lt = INT_CST_LT (minval, primop1); | |
3064 | max_lt = INT_CST_LT (maxval, primop1); | |
3065 | } | |
3066 | ||
3067 | val = 0; | |
3068 | /* This used to be a switch, but Genix compiler can't handle that. */ | |
3069 | if (code == NE_EXPR) | |
3070 | { | |
3071 | if (max_lt || min_gt) | |
de7df9eb | 3072 | val = truthvalue_true_node; |
b30f223b RS |
3073 | } |
3074 | else if (code == EQ_EXPR) | |
3075 | { | |
3076 | if (max_lt || min_gt) | |
de7df9eb | 3077 | val = truthvalue_false_node; |
b30f223b RS |
3078 | } |
3079 | else if (code == LT_EXPR) | |
3080 | { | |
3081 | if (max_lt) | |
de7df9eb | 3082 | val = truthvalue_true_node; |
b30f223b | 3083 | if (!min_lt) |
de7df9eb | 3084 | val = truthvalue_false_node; |
b30f223b RS |
3085 | } |
3086 | else if (code == GT_EXPR) | |
3087 | { | |
3088 | if (min_gt) | |
de7df9eb | 3089 | val = truthvalue_true_node; |
b30f223b | 3090 | if (!max_gt) |
de7df9eb | 3091 | val = truthvalue_false_node; |
b30f223b RS |
3092 | } |
3093 | else if (code == LE_EXPR) | |
3094 | { | |
3095 | if (!max_gt) | |
de7df9eb | 3096 | val = truthvalue_true_node; |
b30f223b | 3097 | if (min_gt) |
de7df9eb | 3098 | val = truthvalue_false_node; |
b30f223b RS |
3099 | } |
3100 | else if (code == GE_EXPR) | |
3101 | { | |
3102 | if (!min_lt) | |
de7df9eb | 3103 | val = truthvalue_true_node; |
b30f223b | 3104 | if (max_lt) |
de7df9eb | 3105 | val = truthvalue_false_node; |
b30f223b RS |
3106 | } |
3107 | ||
3108 | /* If primop0 was sign-extended and unsigned comparison specd, | |
3109 | we did a signed comparison above using the signed type bounds. | |
3110 | But the comparison we output must be unsigned. | |
3111 | ||
3112 | Also, for inequalities, VAL is no good; but if the signed | |
3113 | comparison had *any* fixed result, it follows that the | |
3114 | unsigned comparison just tests the sign in reverse | |
3115 | (positive values are LE, negative ones GE). | |
3116 | So we can generate an unsigned comparison | |
3117 | against an extreme value of the signed type. */ | |
3118 | ||
3119 | if (unsignedp && !unsignedp0) | |
3120 | { | |
3121 | if (val != 0) | |
3122 | switch (code) | |
3123 | { | |
3124 | case LT_EXPR: | |
3125 | case GE_EXPR: | |
3126 | primop1 = TYPE_MIN_VALUE (type); | |
3127 | val = 0; | |
3128 | break; | |
3129 | ||
3130 | case LE_EXPR: | |
3131 | case GT_EXPR: | |
3132 | primop1 = TYPE_MAX_VALUE (type); | |
3133 | val = 0; | |
3134 | break; | |
6d819282 MK |
3135 | |
3136 | default: | |
3137 | break; | |
b30f223b | 3138 | } |
12753674 | 3139 | type = c_common_unsigned_type (type); |
b30f223b RS |
3140 | } |
3141 | ||
5c5b2283 | 3142 | if (TREE_CODE (primop0) != INTEGER_CST) |
b30f223b | 3143 | { |
de7df9eb | 3144 | if (val == truthvalue_false_node) |
f6aa72dd | 3145 | warning (OPT_Wtype_limits, "comparison is always false due to limited range of data type"); |
de7df9eb | 3146 | if (val == truthvalue_true_node) |
f6aa72dd | 3147 | warning (OPT_Wtype_limits, "comparison is always true due to limited range of data type"); |
b30f223b RS |
3148 | } |
3149 | ||
3150 | if (val != 0) | |
3151 | { | |
3152 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3153 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 | 3154 | return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val); |
b30f223b RS |
3155 | return val; |
3156 | } | |
3157 | ||
3158 | /* Value is not predetermined, but do the comparison | |
3159 | in the type of the operand that is not constant. | |
3160 | TYPE is already properly set. */ | |
3161 | } | |
9a8ce21f JG |
3162 | |
3163 | /* If either arg is decimal float and the other is float, find the | |
3164 | proper common type to use for comparison. */ | |
3165 | else if (real1 && real2 | |
3166 | && (DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop0))) | |
3167 | || DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (primop1))))) | |
3168 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
3169 | ||
b30f223b | 3170 | else if (real1 && real2 |
766f6c30 RS |
3171 | && (TYPE_PRECISION (TREE_TYPE (primop0)) |
3172 | == TYPE_PRECISION (TREE_TYPE (primop1)))) | |
b30f223b RS |
3173 | type = TREE_TYPE (primop0); |
3174 | ||
3175 | /* If args' natural types are both narrower than nominal type | |
3176 | and both extend in the same manner, compare them | |
3177 | in the type of the wider arg. | |
3178 | Otherwise must actually extend both to the nominal | |
3179 | common type lest different ways of extending | |
3180 | alter the result. | |
3181 | (eg, (short)-1 == (unsigned short)-1 should be 0.) */ | |
3182 | ||
3183 | else if (unsignedp0 == unsignedp1 && real1 == real2 | |
3184 | && TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr) | |
3185 | && TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr)) | |
3186 | { | |
3187 | type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1)); | |
ceef8ce4 | 3188 | type = c_common_signed_or_unsigned_type (unsignedp0 |
8df83eae | 3189 | || TYPE_UNSIGNED (*restype_ptr), |
ceef8ce4 | 3190 | type); |
b30f223b RS |
3191 | /* Make sure shorter operand is extended the right way |
3192 | to match the longer operand. */ | |
ceef8ce4 NB |
3193 | primop0 |
3194 | = convert (c_common_signed_or_unsigned_type (unsignedp0, | |
3195 | TREE_TYPE (primop0)), | |
3196 | primop0); | |
3197 | primop1 | |
3198 | = convert (c_common_signed_or_unsigned_type (unsignedp1, | |
3199 | TREE_TYPE (primop1)), | |
3200 | primop1); | |
b30f223b RS |
3201 | } |
3202 | else | |
3203 | { | |
3204 | /* Here we must do the comparison on the nominal type | |
3205 | using the args exactly as we received them. */ | |
3206 | type = *restype_ptr; | |
3207 | primop0 = op0; | |
3208 | primop1 = op1; | |
3209 | ||
3210 | if (!real1 && !real2 && integer_zerop (primop1) | |
8df83eae | 3211 | && TYPE_UNSIGNED (*restype_ptr)) |
b30f223b RS |
3212 | { |
3213 | tree value = 0; | |
3214 | switch (code) | |
3215 | { | |
3216 | case GE_EXPR: | |
f6aa72dd MLI |
3217 | /* All unsigned values are >= 0, so we warn. However, |
3218 | if OP0 is a constant that is >= 0, the signedness of | |
3219 | the comparison isn't an issue, so suppress the | |
3220 | warning. */ | |
3221 | if (warn_type_limits && !in_system_header | |
3f75a254 JM |
3222 | && !(TREE_CODE (primop0) == INTEGER_CST |
3223 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3224 | primop0)))) | |
f6aa72dd MLI |
3225 | warning (OPT_Wtype_limits, |
3226 | "comparison of unsigned expression >= 0 is always true"); | |
de7df9eb | 3227 | value = truthvalue_true_node; |
b30f223b RS |
3228 | break; |
3229 | ||
3230 | case LT_EXPR: | |
f6aa72dd | 3231 | if (warn_type_limits && !in_system_header |
3f75a254 JM |
3232 | && !(TREE_CODE (primop0) == INTEGER_CST |
3233 | && !TREE_OVERFLOW (convert (c_common_signed_type (type), | |
3234 | primop0)))) | |
f6aa72dd MLI |
3235 | warning (OPT_Wtype_limits, |
3236 | "comparison of unsigned expression < 0 is always false"); | |
de7df9eb | 3237 | value = truthvalue_false_node; |
6d819282 MK |
3238 | break; |
3239 | ||
3240 | default: | |
3241 | break; | |
b30f223b RS |
3242 | } |
3243 | ||
3244 | if (value != 0) | |
3245 | { | |
3246 | /* Don't forget to evaluate PRIMOP0 if it has side effects. */ | |
3247 | if (TREE_SIDE_EFFECTS (primop0)) | |
53fb4de3 RS |
3248 | return build2 (COMPOUND_EXPR, TREE_TYPE (value), |
3249 | primop0, value); | |
b30f223b RS |
3250 | return value; |
3251 | } | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | *op0_ptr = convert (type, primop0); | |
3256 | *op1_ptr = convert (type, primop1); | |
3257 | ||
de7df9eb | 3258 | *restype_ptr = truthvalue_type_node; |
b30f223b RS |
3259 | |
3260 | return 0; | |
3261 | } | |
3262 | \f | |
7552da58 JJ |
3263 | /* Return a tree for the sum or difference (RESULTCODE says which) |
3264 | of pointer PTROP and integer INTOP. */ | |
3265 | ||
3266 | tree | |
35b1a6fa | 3267 | pointer_int_sum (enum tree_code resultcode, tree ptrop, tree intop) |
7552da58 | 3268 | { |
6ac01510 | 3269 | tree size_exp, ret; |
7552da58 | 3270 | |
7552da58 | 3271 | /* The result is a pointer of the same type that is being added. */ |
7552da58 JJ |
3272 | tree result_type = TREE_TYPE (ptrop); |
3273 | ||
3274 | if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) | |
3275 | { | |
fcf73884 MLI |
3276 | pedwarn (pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
3277 | "pointer of type %<void *%> used in arithmetic"); | |
7552da58 JJ |
3278 | size_exp = integer_one_node; |
3279 | } | |
3280 | else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) | |
3281 | { | |
fcf73884 MLI |
3282 | pedwarn (pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
3283 | "pointer to a function used in arithmetic"); | |
7552da58 JJ |
3284 | size_exp = integer_one_node; |
3285 | } | |
3286 | else if (TREE_CODE (TREE_TYPE (result_type)) == METHOD_TYPE) | |
3287 | { | |
fcf73884 MLI |
3288 | pedwarn (pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
3289 | "pointer to member function used in arithmetic"); | |
7552da58 JJ |
3290 | size_exp = integer_one_node; |
3291 | } | |
7552da58 JJ |
3292 | else |
3293 | size_exp = size_in_bytes (TREE_TYPE (result_type)); | |
3294 | ||
6ac01510 ILT |
3295 | /* We are manipulating pointer values, so we don't need to warn |
3296 | about relying on undefined signed overflow. We disable the | |
3297 | warning here because we use integer types so fold won't know that | |
3298 | they are really pointers. */ | |
3299 | fold_defer_overflow_warnings (); | |
3300 | ||
7552da58 JJ |
3301 | /* If what we are about to multiply by the size of the elements |
3302 | contains a constant term, apply distributive law | |
3303 | and multiply that constant term separately. | |
3304 | This helps produce common subexpressions. */ | |
7552da58 | 3305 | if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) |
3f75a254 | 3306 | && !TREE_CONSTANT (intop) |
7552da58 JJ |
3307 | && TREE_CONSTANT (TREE_OPERAND (intop, 1)) |
3308 | && TREE_CONSTANT (size_exp) | |
3309 | /* If the constant comes from pointer subtraction, | |
3310 | skip this optimization--it would cause an error. */ | |
3311 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE | |
3312 | /* If the constant is unsigned, and smaller than the pointer size, | |
3313 | then we must skip this optimization. This is because it could cause | |
3314 | an overflow error if the constant is negative but INTOP is not. */ | |
3f75a254 | 3315 | && (!TYPE_UNSIGNED (TREE_TYPE (intop)) |
7552da58 JJ |
3316 | || (TYPE_PRECISION (TREE_TYPE (intop)) |
3317 | == TYPE_PRECISION (TREE_TYPE (ptrop))))) | |
3318 | { | |
3319 | enum tree_code subcode = resultcode; | |
3320 | tree int_type = TREE_TYPE (intop); | |
3321 | if (TREE_CODE (intop) == MINUS_EXPR) | |
3322 | subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); | |
3323 | /* Convert both subexpression types to the type of intop, | |
3324 | because weird cases involving pointer arithmetic | |
3325 | can result in a sum or difference with different type args. */ | |
3326 | ptrop = build_binary_op (subcode, ptrop, | |
3327 | convert (int_type, TREE_OPERAND (intop, 1)), 1); | |
3328 | intop = convert (int_type, TREE_OPERAND (intop, 0)); | |
3329 | } | |
3330 | ||
3331 | /* Convert the integer argument to a type the same size as sizetype | |
3332 | so the multiply won't overflow spuriously. */ | |
7552da58 | 3333 | if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype) |
8df83eae | 3334 | || TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype)) |
35b1a6fa | 3335 | intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype), |
8df83eae | 3336 | TYPE_UNSIGNED (sizetype)), intop); |
7552da58 JJ |
3337 | |
3338 | /* Replace the integer argument with a suitable product by the object size. | |
3339 | Do this multiplication as signed, then convert to the appropriate | |
280f1ffa EB |
3340 | type for the pointer operation. */ |
3341 | intop = convert (sizetype, | |
3342 | build_binary_op (MULT_EXPR, intop, | |
3343 | convert (TREE_TYPE (intop), size_exp), 1)); | |
5be014d5 | 3344 | |
280f1ffa | 3345 | /* Create the sum or difference. */ |
5be014d5 | 3346 | if (resultcode == MINUS_EXPR) |
280f1ffa | 3347 | intop = fold_build1 (NEGATE_EXPR, sizetype, intop); |
7552da58 | 3348 | |
5be014d5 | 3349 | ret = fold_build2 (POINTER_PLUS_EXPR, result_type, ptrop, intop); |
6ac01510 ILT |
3350 | |
3351 | fold_undefer_and_ignore_overflow_warnings (); | |
3352 | ||
3353 | return ret; | |
7552da58 JJ |
3354 | } |
3355 | \f | |
b3c6d2ea ILT |
3356 | /* Return whether EXPR is a declaration whose address can never be |
3357 | NULL. */ | |
3358 | ||
3359 | bool | |
58f9752a | 3360 | decl_with_nonnull_addr_p (const_tree expr) |
b3c6d2ea ILT |
3361 | { |
3362 | return (DECL_P (expr) | |
3363 | && (TREE_CODE (expr) == PARM_DECL | |
3364 | || TREE_CODE (expr) == LABEL_DECL | |
3365 | || !DECL_WEAK (expr))); | |
3366 | } | |
3367 | ||
b30f223b | 3368 | /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
85498824 JM |
3369 | or for an `if' or `while' statement or ?..: exp. It should already |
3370 | have been validated to be of suitable type; otherwise, a bad | |
3371 | diagnostic may result. | |
b30f223b RS |
3372 | |
3373 | This preparation consists of taking the ordinary | |
3374 | representation of an expression expr and producing a valid tree | |
3375 | boolean expression describing whether expr is nonzero. We could | |
de7df9eb | 3376 | simply always do build_binary_op (NE_EXPR, expr, truthvalue_false_node, 1), |
b30f223b RS |
3377 | but we optimize comparisons, &&, ||, and !. |
3378 | ||
de7df9eb | 3379 | The resulting type should always be `truthvalue_type_node'. */ |
b30f223b RS |
3380 | |
3381 | tree | |
35b1a6fa | 3382 | c_common_truthvalue_conversion (tree expr) |
b30f223b | 3383 | { |
b30f223b RS |
3384 | switch (TREE_CODE (expr)) |
3385 | { | |
d1a7edaf | 3386 | case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR: |
6f312d18 ZW |
3387 | case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR: |
3388 | case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR: | |
3389 | case ORDERED_EXPR: case UNORDERED_EXPR: | |
90ec750d RS |
3390 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3391 | return expr; | |
3392 | return build2 (TREE_CODE (expr), truthvalue_type_node, | |
3393 | TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1)); | |
3394 | ||
b30f223b RS |
3395 | case TRUTH_ANDIF_EXPR: |
3396 | case TRUTH_ORIF_EXPR: | |
3397 | case TRUTH_AND_EXPR: | |
3398 | case TRUTH_OR_EXPR: | |
9379fac9 | 3399 | case TRUTH_XOR_EXPR: |
90ec750d RS |
3400 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3401 | return expr; | |
3402 | return build2 (TREE_CODE (expr), truthvalue_type_node, | |
85498824 JM |
3403 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)), |
3404 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1))); | |
18c0f675 | 3405 | |
18d00205 | 3406 | case TRUTH_NOT_EXPR: |
90ec750d RS |
3407 | if (TREE_TYPE (expr) == truthvalue_type_node) |
3408 | return expr; | |
3409 | return build1 (TREE_CODE (expr), truthvalue_type_node, | |
85498824 | 3410 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0))); |
18d00205 | 3411 | |
b30f223b RS |
3412 | case ERROR_MARK: |
3413 | return expr; | |
3414 | ||
3415 | case INTEGER_CST: | |
d95787e6 RS |
3416 | return integer_zerop (expr) ? truthvalue_false_node |
3417 | : truthvalue_true_node; | |
b30f223b RS |
3418 | |
3419 | case REAL_CST: | |
010c4d9c RS |
3420 | return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0) |
3421 | ? truthvalue_true_node | |
3422 | : truthvalue_false_node; | |
b30f223b | 3423 | |
ab22c1fa CF |
3424 | case FIXED_CST: |
3425 | return fixed_compare (NE_EXPR, &TREE_FIXED_CST (expr), | |
3426 | &FCONST0 (TYPE_MODE (TREE_TYPE (expr)))) | |
3427 | ? truthvalue_true_node | |
3428 | : truthvalue_false_node; | |
3429 | ||
90ec750d RS |
3430 | case FUNCTION_DECL: |
3431 | expr = build_unary_op (ADDR_EXPR, expr, 0); | |
3432 | /* Fall through. */ | |
3433 | ||
b30f223b | 3434 | case ADDR_EXPR: |
1998463c | 3435 | { |
f6f08360 | 3436 | tree inner = TREE_OPERAND (expr, 0); |
b3c6d2ea | 3437 | if (decl_with_nonnull_addr_p (inner)) |
1998463c | 3438 | { |
b3c6d2ea | 3439 | /* Common Ada/Pascal programmer's mistake. */ |
c116cd05 | 3440 | warning (OPT_Waddress, |
b3c6d2ea | 3441 | "the address of %qD will always evaluate as %<true%>", |
f6f08360 | 3442 | inner); |
1998463c SB |
3443 | return truthvalue_true_node; |
3444 | } | |
fc0c675f | 3445 | |
b3c6d2ea ILT |
3446 | /* If we still have a decl, it is possible for its address to |
3447 | be NULL, so we cannot optimize. */ | |
3448 | if (DECL_P (inner)) | |
3449 | { | |
3450 | gcc_assert (DECL_WEAK (inner)); | |
3451 | break; | |
3452 | } | |
1998463c | 3453 | |
f6f08360 | 3454 | if (TREE_SIDE_EFFECTS (inner)) |
53fb4de3 | 3455 | return build2 (COMPOUND_EXPR, truthvalue_type_node, |
f6f08360 | 3456 | inner, truthvalue_true_node); |
1998463c SB |
3457 | else |
3458 | return truthvalue_true_node; | |
3459 | } | |
b30f223b | 3460 | |
766f6c30 | 3461 | case COMPLEX_EXPR: |
f0b996c5 | 3462 | return build_binary_op ((TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)) |
b839fb3f | 3463 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), |
85498824 JM |
3464 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)), |
3465 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)), | |
766f6c30 RS |
3466 | 0); |
3467 | ||
b30f223b RS |
3468 | case NEGATE_EXPR: |
3469 | case ABS_EXPR: | |
3470 | case FLOAT_EXPR: | |
da7d8304 | 3471 | /* These don't change whether an object is nonzero or zero. */ |
85498824 | 3472 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b30f223b RS |
3473 | |
3474 | case LROTATE_EXPR: | |
3475 | case RROTATE_EXPR: | |
da7d8304 | 3476 | /* These don't change whether an object is zero or nonzero, but |
b30f223b RS |
3477 | we can't ignore them if their second arg has side-effects. */ |
3478 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))) | |
53fb4de3 RS |
3479 | return build2 (COMPOUND_EXPR, truthvalue_type_node, |
3480 | TREE_OPERAND (expr, 1), | |
85498824 | 3481 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 0))); |
b30f223b | 3482 | else |
85498824 | 3483 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b57062ca | 3484 | |
b30f223b RS |
3485 | case COND_EXPR: |
3486 | /* Distribute the conversion into the arms of a COND_EXPR. */ | |
987b67bc | 3487 | return fold_build3 (COND_EXPR, truthvalue_type_node, |
53fb4de3 | 3488 | TREE_OPERAND (expr, 0), |
85498824 | 3489 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)), |
987b67bc | 3490 | c_common_truthvalue_conversion (TREE_OPERAND (expr, 2))); |
b30f223b | 3491 | |
1043771b | 3492 | CASE_CONVERT: |
b30f223b RS |
3493 | /* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE, |
3494 | since that affects how `default_conversion' will behave. */ | |
3495 | if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE | |
3496 | || TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE) | |
3497 | break; | |
b30f223b RS |
3498 | /* If this is widening the argument, we can ignore it. */ |
3499 | if (TYPE_PRECISION (TREE_TYPE (expr)) | |
3500 | >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0)))) | |
85498824 | 3501 | return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)); |
b30f223b RS |
3502 | break; |
3503 | ||
e2aab13d | 3504 | case MODIFY_EXPR: |
fbc8d2d3 ILT |
3505 | if (!TREE_NO_WARNING (expr) |
3506 | && warn_parentheses) | |
3507 | { | |
3508 | warning (OPT_Wparentheses, | |
3509 | "suggest parentheses around assignment used as truth value"); | |
3510 | TREE_NO_WARNING (expr) = 1; | |
3511 | } | |
e2aab13d | 3512 | break; |
b57062ca | 3513 | |
6d819282 MK |
3514 | default: |
3515 | break; | |
b30f223b RS |
3516 | } |
3517 | ||
f0b996c5 | 3518 | if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE) |
f0b8d9aa | 3519 | { |
78ef5b89 | 3520 | tree t = save_expr (expr); |
f0b8d9aa AS |
3521 | return (build_binary_op |
3522 | ((TREE_SIDE_EFFECTS (expr) | |
3523 | ? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR), | |
85498824 JM |
3524 | c_common_truthvalue_conversion (build_unary_op (REALPART_EXPR, t, 0)), |
3525 | c_common_truthvalue_conversion (build_unary_op (IMAGPART_EXPR, t, 0)), | |
f0b8d9aa AS |
3526 | 0)); |
3527 | } | |
f0b996c5 | 3528 | |
ab22c1fa CF |
3529 | if (TREE_CODE (TREE_TYPE (expr)) == FIXED_POINT_TYPE) |
3530 | { | |
3531 | tree fixed_zero_node = build_fixed (TREE_TYPE (expr), | |
3532 | FCONST0 (TYPE_MODE | |
3533 | (TREE_TYPE (expr)))); | |
3534 | return build_binary_op (NE_EXPR, expr, fixed_zero_node, 1); | |
3535 | } | |
3536 | ||
b30f223b RS |
3537 | return build_binary_op (NE_EXPR, expr, integer_zero_node, 1); |
3538 | } | |
3539 | \f | |
9bc15050 RG |
3540 | static void def_builtin_1 (enum built_in_function fncode, |
3541 | const char *name, | |
3542 | enum built_in_class fnclass, | |
3543 | tree fntype, tree libtype, | |
3544 | bool both_p, bool fallback_p, bool nonansi_p, | |
3545 | tree fnattrs, bool implicit_p); | |
fc2aaf30 | 3546 | |
3932261a MM |
3547 | |
3548 | /* Apply the TYPE_QUALS to the new DECL. */ | |
3549 | ||
3550 | void | |
35b1a6fa | 3551 | c_apply_type_quals_to_decl (int type_quals, tree decl) |
3932261a | 3552 | { |
4b011bbf | 3553 | tree type = TREE_TYPE (decl); |
9f63daea | 3554 | |
5a6159dd AP |
3555 | if (type == error_mark_node) |
3556 | return; | |
4b011bbf JM |
3557 | |
3558 | if (((type_quals & TYPE_QUAL_CONST) | |
3559 | || (type && TREE_CODE (type) == REFERENCE_TYPE)) | |
3560 | /* An object declared 'const' is only readonly after it is | |
3561 | initialized. We don't have any way of expressing this currently, | |
3562 | so we need to be conservative and unset TREE_READONLY for types | |
3563 | with constructors. Otherwise aliasing code will ignore stores in | |
3564 | an inline constructor. */ | |
3565 | && !(type && TYPE_NEEDS_CONSTRUCTING (type))) | |
3932261a MM |
3566 | TREE_READONLY (decl) = 1; |
3567 | if (type_quals & TYPE_QUAL_VOLATILE) | |
3568 | { | |
3569 | TREE_SIDE_EFFECTS (decl) = 1; | |
3570 | TREE_THIS_VOLATILE (decl) = 1; | |
3571 | } | |
6946bc60 | 3572 | if (type_quals & TYPE_QUAL_RESTRICT) |
3932261a | 3573 | { |
4b011bbf JM |
3574 | while (type && TREE_CODE (type) == ARRAY_TYPE) |
3575 | /* Allow 'restrict' on arrays of pointers. | |
3576 | FIXME currently we just ignore it. */ | |
3577 | type = TREE_TYPE (type); | |
3578 | if (!type | |
3579 | || !POINTER_TYPE_P (type) | |
3580 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))) | |
bda67431 | 3581 | error ("invalid use of %<restrict%>"); |
4b011bbf | 3582 | else if (flag_strict_aliasing && type == TREE_TYPE (decl)) |
3c5ad1ff RK |
3583 | /* Indicate we need to make a unique alias set for this pointer. |
3584 | We can't do it here because it might be pointing to an | |
3585 | incomplete type. */ | |
3586 | DECL_POINTER_ALIAS_SET (decl) = -2; | |
3932261a MM |
3587 | } |
3588 | } | |
3589 | ||
6de9cd9a DN |
3590 | /* Hash function for the problem of multiple type definitions in |
3591 | different files. This must hash all types that will compare | |
3592 | equal via comptypes to the same value. In practice it hashes | |
9cf737f8 | 3593 | on some of the simple stuff and leaves the details to comptypes. */ |
6de9cd9a DN |
3594 | |
3595 | static hashval_t | |
3596 | c_type_hash (const void *p) | |
3597 | { | |
3598 | int i = 0; | |
3599 | int shift, size; | |
741ac903 | 3600 | const_tree const t = (const_tree) p; |
6de9cd9a DN |
3601 | tree t2; |
3602 | switch (TREE_CODE (t)) | |
3603 | { | |
8c27b7d4 | 3604 | /* For pointers, hash on pointee type plus some swizzling. */ |
325c3691 RH |
3605 | case POINTER_TYPE: |
3606 | return c_type_hash (TREE_TYPE (t)) ^ 0x3003003; | |
3607 | /* Hash on number of elements and total size. */ | |
3608 | case ENUMERAL_TYPE: | |
3609 | shift = 3; | |
3610 | t2 = TYPE_VALUES (t); | |
3611 | break; | |
3612 | case RECORD_TYPE: | |
3613 | shift = 0; | |
3614 | t2 = TYPE_FIELDS (t); | |
3615 | break; | |
3616 | case QUAL_UNION_TYPE: | |
3617 | shift = 1; | |
3618 | t2 = TYPE_FIELDS (t); | |
3619 | break; | |
3620 | case UNION_TYPE: | |
3621 | shift = 2; | |
3622 | t2 = TYPE_FIELDS (t); | |
3623 | break; | |
3624 | default: | |
366de0ce | 3625 | gcc_unreachable (); |
6de9cd9a DN |
3626 | } |
3627 | for (; t2; t2 = TREE_CHAIN (t2)) | |
3628 | i++; | |
6fc3c3c0 TT |
3629 | /* We might have a VLA here. */ |
3630 | if (TREE_CODE (TYPE_SIZE (t)) != INTEGER_CST) | |
3631 | size = 0; | |
3632 | else | |
3633 | size = TREE_INT_CST_LOW (TYPE_SIZE (t)); | |
6de9cd9a DN |
3634 | return ((size << 24) | (i << shift)); |
3635 | } | |
3636 | ||
4fe52ce9 DJ |
3637 | static GTY((param_is (union tree_node))) htab_t type_hash_table; |
3638 | ||
41472af8 | 3639 | /* Return the typed-based alias set for T, which may be an expression |
3bdf5ad1 | 3640 | or a type. Return -1 if we don't do anything special. */ |
41472af8 | 3641 | |
4862826d | 3642 | alias_set_type |
35b1a6fa | 3643 | c_common_get_alias_set (tree t) |
41472af8 | 3644 | { |
08bc2431 | 3645 | tree u; |
6de9cd9a | 3646 | PTR *slot; |
35b1a6fa | 3647 | |
08bc2431 MM |
3648 | /* Permit type-punning when accessing a union, provided the access |
3649 | is directly through the union. For example, this code does not | |
3650 | permit taking the address of a union member and then storing | |
3651 | through it. Even the type-punning allowed here is a GCC | |
3652 | extension, albeit a common and useful one; the C standard says | |
3653 | that such accesses have implementation-defined behavior. */ | |
3654 | for (u = t; | |
3655 | TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF; | |
3656 | u = TREE_OPERAND (u, 0)) | |
3657 | if (TREE_CODE (u) == COMPONENT_REF | |
3658 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE) | |
3659 | return 0; | |
ece32014 | 3660 | |
74d86f4f | 3661 | /* That's all the expressions we handle specially. */ |
3f75a254 | 3662 | if (!TYPE_P (t)) |
74d86f4f RH |
3663 | return -1; |
3664 | ||
95bd1dd7 | 3665 | /* The C standard guarantees that any object may be accessed via an |
74d86f4f RH |
3666 | lvalue that has character type. */ |
3667 | if (t == char_type_node | |
3668 | || t == signed_char_type_node | |
3669 | || t == unsigned_char_type_node) | |
3bdf5ad1 | 3670 | return 0; |
3932261a | 3671 | |
f824e5c3 RK |
3672 | /* The C standard specifically allows aliasing between signed and |
3673 | unsigned variants of the same type. We treat the signed | |
3674 | variant as canonical. */ | |
8df83eae | 3675 | if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t)) |
8f215dce | 3676 | { |
ceef8ce4 | 3677 | tree t1 = c_common_signed_type (t); |
f824e5c3 | 3678 | |
8f215dce JJ |
3679 | /* t1 == t can happen for boolean nodes which are always unsigned. */ |
3680 | if (t1 != t) | |
3681 | return get_alias_set (t1); | |
3682 | } | |
3bdf5ad1 | 3683 | else if (POINTER_TYPE_P (t)) |
02af3af6 | 3684 | { |
3bdf5ad1 | 3685 | tree t1; |
02af3af6 MS |
3686 | |
3687 | /* Unfortunately, there is no canonical form of a pointer type. | |
3688 | In particular, if we have `typedef int I', then `int *', and | |
3689 | `I *' are different types. So, we have to pick a canonical | |
3690 | representative. We do this below. | |
d125d268 | 3691 | |
b61148dd MM |
3692 | Technically, this approach is actually more conservative that |
3693 | it needs to be. In particular, `const int *' and `int *' | |
684d9f3b | 3694 | should be in different alias sets, according to the C and C++ |
b61148dd MM |
3695 | standard, since their types are not the same, and so, |
3696 | technically, an `int **' and `const int **' cannot point at | |
3697 | the same thing. | |
3698 | ||
6de9cd9a | 3699 | But, the standard is wrong. In particular, this code is |
b61148dd MM |
3700 | legal C++: |
3701 | ||
c22cacf3 MS |
3702 | int *ip; |
3703 | int **ipp = &ip; | |
3704 | const int* const* cipp = ipp; | |
b61148dd | 3705 | |
6de9cd9a | 3706 | And, it doesn't make sense for that to be legal unless you |
b61148dd MM |
3707 | can dereference IPP and CIPP. So, we ignore cv-qualifiers on |
3708 | the pointed-to types. This issue has been reported to the | |
3709 | C++ committee. */ | |
12e1243e | 3710 | t1 = build_type_no_quals (t); |
3bdf5ad1 RK |
3711 | if (t1 != t) |
3712 | return get_alias_set (t1); | |
02af3af6 | 3713 | } |
ece32014 | 3714 | |
6de9cd9a DN |
3715 | /* Handle the case of multiple type nodes referring to "the same" type, |
3716 | which occurs with IMA. These share an alias set. FIXME: Currently only | |
3717 | C90 is handled. (In C99 type compatibility is not transitive, which | |
3718 | complicates things mightily. The alias set splay trees can theoretically | |
3719 | represent this, but insertion is tricky when you consider all the | |
3720 | different orders things might arrive in.) */ | |
3721 | ||
3722 | if (c_language != clk_c || flag_isoc99) | |
3723 | return -1; | |
3724 | ||
9cf737f8 | 3725 | /* Save time if there's only one input file. */ |
d974312d | 3726 | if (num_in_fnames == 1) |
6de9cd9a DN |
3727 | return -1; |
3728 | ||
3729 | /* Pointers need special handling if they point to any type that | |
3730 | needs special handling (below). */ | |
3731 | if (TREE_CODE (t) == POINTER_TYPE) | |
3732 | { | |
3733 | tree t2; | |
3734 | /* Find bottom type under any nested POINTERs. */ | |
9f63daea | 3735 | for (t2 = TREE_TYPE (t); |
762f7d9d TT |
3736 | TREE_CODE (t2) == POINTER_TYPE; |
3737 | t2 = TREE_TYPE (t2)) | |
3738 | ; | |
9f63daea | 3739 | if (TREE_CODE (t2) != RECORD_TYPE |
762f7d9d TT |
3740 | && TREE_CODE (t2) != ENUMERAL_TYPE |
3741 | && TREE_CODE (t2) != QUAL_UNION_TYPE | |
3742 | && TREE_CODE (t2) != UNION_TYPE) | |
3743 | return -1; | |
6de9cd9a | 3744 | if (TYPE_SIZE (t2) == 0) |
762f7d9d | 3745 | return -1; |
6de9cd9a DN |
3746 | } |
3747 | /* These are the only cases that need special handling. */ | |
9f63daea | 3748 | if (TREE_CODE (t) != RECORD_TYPE |
6de9cd9a DN |
3749 | && TREE_CODE (t) != ENUMERAL_TYPE |
3750 | && TREE_CODE (t) != QUAL_UNION_TYPE | |
3751 | && TREE_CODE (t) != UNION_TYPE | |
3752 | && TREE_CODE (t) != POINTER_TYPE) | |
3753 | return -1; | |
3754 | /* Undefined? */ | |
3755 | if (TYPE_SIZE (t) == 0) | |
3756 | return -1; | |
3757 | ||
9f63daea | 3758 | /* Look up t in hash table. Only one of the compatible types within each |
6de9cd9a DN |
3759 | alias set is recorded in the table. */ |
3760 | if (!type_hash_table) | |
4fe52ce9 | 3761 | type_hash_table = htab_create_ggc (1021, c_type_hash, |
6de9cd9a DN |
3762 | (htab_eq) lang_hooks.types_compatible_p, |
3763 | NULL); | |
3764 | slot = htab_find_slot (type_hash_table, t, INSERT); | |
3765 | if (*slot != NULL) | |
6a3203c8 AP |
3766 | { |
3767 | TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot); | |
3768 | return TYPE_ALIAS_SET ((tree)*slot); | |
3769 | } | |
6de9cd9a DN |
3770 | else |
3771 | /* Our caller will assign and record (in t) a new alias set; all we need | |
3772 | to do is remember t in the hash table. */ | |
3773 | *slot = t; | |
3774 | ||
3bdf5ad1 | 3775 | return -1; |
41472af8 | 3776 | } |
0213a355 | 3777 | \f |
fa72b064 | 3778 | /* Compute the value of 'sizeof (TYPE)' or '__alignof__ (TYPE)', where the |
ea793912 GDR |
3779 | second parameter indicates which OPERATOR is being applied. The COMPLAIN |
3780 | flag controls whether we should diagnose possibly ill-formed | |
3781 | constructs or not. */ | |
03a08664 | 3782 | |
0213a355 | 3783 | tree |
03a08664 | 3784 | c_sizeof_or_alignof_type (tree type, bool is_sizeof, int complain) |
0213a355 | 3785 | { |
fa72b064 GDR |
3786 | const char *op_name; |
3787 | tree value = NULL; | |
3788 | enum tree_code type_code = TREE_CODE (type); | |
35b1a6fa | 3789 | |
03a08664 | 3790 | op_name = is_sizeof ? "sizeof" : "__alignof__"; |
35b1a6fa | 3791 | |
fa72b064 | 3792 | if (type_code == FUNCTION_TYPE) |
0213a355 | 3793 | { |
03a08664 | 3794 | if (is_sizeof) |
fa72b064 | 3795 | { |
ea793912 | 3796 | if (complain && (pedantic || warn_pointer_arith)) |
fcf73884 MLI |
3797 | pedwarn (pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
3798 | "invalid application of %<sizeof%> to a function type"); | |
5ade1ed2 DG |
3799 | else if (!complain) |
3800 | return error_mark_node; | |
fa72b064 GDR |
3801 | value = size_one_node; |
3802 | } | |
3803 | else | |
3804 | value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
3805 | } | |
3806 | else if (type_code == VOID_TYPE || type_code == ERROR_MARK) | |
3807 | { | |
35b1a6fa | 3808 | if (type_code == VOID_TYPE |
ea793912 | 3809 | && complain && (pedantic || warn_pointer_arith)) |
fcf73884 MLI |
3810 | pedwarn (pedantic ? OPT_pedantic : OPT_Wpointer_arith, |
3811 | "invalid application of %qs to a void type", op_name); | |
5ade1ed2 DG |
3812 | else if (!complain) |
3813 | return error_mark_node; | |
fa72b064 | 3814 | value = size_one_node; |
0213a355 | 3815 | } |
0213a355 JM |
3816 | else if (!COMPLETE_TYPE_P (type)) |
3817 | { | |
ea793912 | 3818 | if (complain) |
bda67431 | 3819 | error ("invalid application of %qs to incomplete type %qT ", |
d5a10cf0 | 3820 | op_name, type); |
fa72b064 | 3821 | value = size_zero_node; |
0213a355 JM |
3822 | } |
3823 | else | |
fa72b064 | 3824 | { |
03a08664 | 3825 | if (is_sizeof) |
fa72b064 GDR |
3826 | /* Convert in case a char is more than one unit. */ |
3827 | value = size_binop (CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), | |
3828 | size_int (TYPE_PRECISION (char_type_node) | |
3829 | / BITS_PER_UNIT)); | |
3830 | else | |
a4e9ffe5 | 3831 | value = size_int (TYPE_ALIGN_UNIT (type)); |
fa72b064 | 3832 | } |
0213a355 | 3833 | |
fa72b064 GDR |
3834 | /* VALUE will have an integer type with TYPE_IS_SIZETYPE set. |
3835 | TYPE_IS_SIZETYPE means that certain things (like overflow) will | |
3836 | never happen. However, this node should really have type | |
3837 | `size_t', which is just a typedef for an ordinary integer type. */ | |
4c7a6c1b | 3838 | value = fold_convert (size_type_node, value); |
4094f4d2 | 3839 | gcc_assert (!TYPE_IS_SIZETYPE (TREE_TYPE (value))); |
35b1a6fa | 3840 | |
fa72b064 | 3841 | return value; |
0213a355 JM |
3842 | } |
3843 | ||
3844 | /* Implement the __alignof keyword: Return the minimum required | |
837edd5f GK |
3845 | alignment of EXPR, measured in bytes. For VAR_DECLs, |
3846 | FUNCTION_DECLs and FIELD_DECLs return DECL_ALIGN (which can be set | |
3847 | from an "aligned" __attribute__ specification). */ | |
7f4edbcb | 3848 | |
0213a355 | 3849 | tree |
35b1a6fa | 3850 | c_alignof_expr (tree expr) |
0213a355 JM |
3851 | { |
3852 | tree t; | |
3853 | ||
837edd5f | 3854 | if (VAR_OR_FUNCTION_DECL_P (expr)) |
a4e9ffe5 | 3855 | t = size_int (DECL_ALIGN_UNIT (expr)); |
35b1a6fa | 3856 | |
0213a355 JM |
3857 | else if (TREE_CODE (expr) == COMPONENT_REF |
3858 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
3859 | { | |
bda67431 | 3860 | error ("%<__alignof%> applied to a bit-field"); |
0213a355 JM |
3861 | t = size_one_node; |
3862 | } | |
3863 | else if (TREE_CODE (expr) == COMPONENT_REF | |
173bf5be | 3864 | && TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL) |
a4e9ffe5 | 3865 | t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1))); |
35b1a6fa | 3866 | |
0213a355 JM |
3867 | else if (TREE_CODE (expr) == INDIRECT_REF) |
3868 | { | |
3869 | tree t = TREE_OPERAND (expr, 0); | |
3870 | tree best = t; | |
3871 | int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
35b1a6fa | 3872 | |
1043771b | 3873 | while (CONVERT_EXPR_P (t) |
173bf5be | 3874 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) |
0213a355 JM |
3875 | { |
3876 | int thisalign; | |
3877 | ||
3878 | t = TREE_OPERAND (t, 0); | |
3879 | thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); | |
3880 | if (thisalign > bestalign) | |
3881 | best = t, bestalign = thisalign; | |
3882 | } | |
3883 | return c_alignof (TREE_TYPE (TREE_TYPE (best))); | |
3884 | } | |
3885 | else | |
3886 | return c_alignof (TREE_TYPE (expr)); | |
3887 | ||
4c7a6c1b | 3888 | return fold_convert (size_type_node, t); |
0213a355 JM |
3889 | } |
3890 | \f | |
df061a43 RS |
3891 | /* Handle C and C++ default attributes. */ |
3892 | ||
3893 | enum built_in_attribute | |
3894 | { | |
3895 | #define DEF_ATTR_NULL_TREE(ENUM) ENUM, | |
3896 | #define DEF_ATTR_INT(ENUM, VALUE) ENUM, | |
3897 | #define DEF_ATTR_IDENT(ENUM, STRING) ENUM, | |
3898 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM, | |
df061a43 RS |
3899 | #include "builtin-attrs.def" |
3900 | #undef DEF_ATTR_NULL_TREE | |
3901 | #undef DEF_ATTR_INT | |
3902 | #undef DEF_ATTR_IDENT | |
3903 | #undef DEF_ATTR_TREE_LIST | |
df061a43 RS |
3904 | ATTR_LAST |
3905 | }; | |
3906 | ||
3907 | static GTY(()) tree built_in_attributes[(int) ATTR_LAST]; | |
3908 | ||
35b1a6fa | 3909 | static void c_init_attributes (void); |
df061a43 | 3910 | |
a0274e3e | 3911 | enum c_builtin_type |
7f4edbcb | 3912 | { |
10841285 MM |
3913 | #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME, |
3914 | #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME, | |
3915 | #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME, | |
3916 | #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME, | |
3917 | #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, | |
3918 | #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, | |
10a0d495 | 3919 | #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME, |
a0274e3e JJ |
3920 | #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6) NAME, |
3921 | #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7) NAME, | |
10841285 MM |
3922 | #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME, |
3923 | #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME, | |
3924 | #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME, | |
08291658 | 3925 | #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME, |
10a0d495 JJ |
3926 | #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME, |
3927 | #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG6) \ | |
3928 | NAME, | |
10841285 MM |
3929 | #define DEF_POINTER_TYPE(NAME, TYPE) NAME, |
3930 | #include "builtin-types.def" | |
3931 | #undef DEF_PRIMITIVE_TYPE | |
3932 | #undef DEF_FUNCTION_TYPE_0 | |
3933 | #undef DEF_FUNCTION_TYPE_1 | |
3934 | #undef DEF_FUNCTION_TYPE_2 | |
3935 | #undef DEF_FUNCTION_TYPE_3 | |
3936 | #undef DEF_FUNCTION_TYPE_4 | |
10a0d495 JJ |
3937 | #undef DEF_FUNCTION_TYPE_5 |
3938 | #undef DEF_FUNCTION_TYPE_6 | |
a0274e3e | 3939 | #undef DEF_FUNCTION_TYPE_7 |
10841285 MM |
3940 | #undef DEF_FUNCTION_TYPE_VAR_0 |
3941 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
3942 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
08291658 | 3943 | #undef DEF_FUNCTION_TYPE_VAR_3 |
10a0d495 JJ |
3944 | #undef DEF_FUNCTION_TYPE_VAR_4 |
3945 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
10841285 | 3946 | #undef DEF_POINTER_TYPE |
a0274e3e JJ |
3947 | BT_LAST |
3948 | }; | |
3949 | ||
3950 | typedef enum c_builtin_type builtin_type; | |
10841285 | 3951 | |
a0274e3e JJ |
3952 | /* A temporary array for c_common_nodes_and_builtins. Used in |
3953 | communication with def_fn_type. */ | |
3954 | static tree builtin_types[(int) BT_LAST + 1]; | |
10841285 | 3955 | |
a0274e3e JJ |
3956 | /* A helper function for c_common_nodes_and_builtins. Build function type |
3957 | for DEF with return type RET and N arguments. If VAR is true, then the | |
3958 | function should be variadic after those N arguments. | |
3959 | ||
3960 | Takes special care not to ICE if any of the types involved are | |
3961 | error_mark_node, which indicates that said type is not in fact available | |
3962 | (see builtin_type_for_size). In which case the function type as a whole | |
3963 | should be error_mark_node. */ | |
3964 | ||
3965 | static void | |
3966 | def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...) | |
3967 | { | |
3968 | tree args = NULL, t; | |
3969 | va_list list; | |
3970 | int i; | |
3971 | ||
3972 | va_start (list, n); | |
3973 | for (i = 0; i < n; ++i) | |
3974 | { | |
d75d71e0 | 3975 | builtin_type a = (builtin_type) va_arg (list, int); |
a0274e3e JJ |
3976 | t = builtin_types[a]; |
3977 | if (t == error_mark_node) | |
3978 | goto egress; | |
3979 | args = tree_cons (NULL_TREE, t, args); | |
3980 | } | |
3981 | va_end (list); | |
3982 | ||
3983 | args = nreverse (args); | |
3984 | if (!var) | |
3985 | args = chainon (args, void_list_node); | |
3986 | ||
3987 | t = builtin_types[ret]; | |
3988 | if (t == error_mark_node) | |
3989 | goto egress; | |
3990 | t = build_function_type (t, args); | |
3991 | ||
3992 | egress: | |
3993 | builtin_types[def] = t; | |
3994 | } | |
3995 | ||
c6d86fce ILT |
3996 | /* Build builtin functions common to both C and C++ language |
3997 | frontends. */ | |
3998 | ||
3999 | static void | |
4000 | c_define_builtins (tree va_list_ref_type_node, tree va_list_arg_type_node) | |
4001 | { | |
4002 | #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \ | |
4003 | builtin_types[ENUM] = VALUE; | |
4004 | #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \ | |
4005 | def_fn_type (ENUM, RETURN, 0, 0); | |
4006 | #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \ | |
4007 | def_fn_type (ENUM, RETURN, 0, 1, ARG1); | |
4008 | #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \ | |
4009 | def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2); | |
4010 | #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
4011 | def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3); | |
4012 | #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
4013 | def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4); | |
4014 | #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
4015 | def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
4016 | #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
4017 | ARG6) \ | |
4018 | def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); | |
4019 | #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \ | |
4020 | ARG6, ARG7) \ | |
4021 | def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7); | |
4022 | #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \ | |
4023 | def_fn_type (ENUM, RETURN, 1, 0); | |
4024 | #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \ | |
4025 | def_fn_type (ENUM, RETURN, 1, 1, ARG1); | |
4026 | #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \ | |
4027 | def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2); | |
4028 | #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \ | |
4029 | def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3); | |
4030 | #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \ | |
4031 | def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4); | |
4032 | #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \ | |
4033 | def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5); | |
4034 | #define DEF_POINTER_TYPE(ENUM, TYPE) \ | |
4035 | builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]); | |
4036 | ||
4037 | #include "builtin-types.def" | |
4038 | ||
4039 | #undef DEF_PRIMITIVE_TYPE | |
4040 | #undef DEF_FUNCTION_TYPE_1 | |
4041 | #undef DEF_FUNCTION_TYPE_2 | |
4042 | #undef DEF_FUNCTION_TYPE_3 | |
4043 | #undef DEF_FUNCTION_TYPE_4 | |
4044 | #undef DEF_FUNCTION_TYPE_5 | |
4045 | #undef DEF_FUNCTION_TYPE_6 | |
4046 | #undef DEF_FUNCTION_TYPE_VAR_0 | |
4047 | #undef DEF_FUNCTION_TYPE_VAR_1 | |
4048 | #undef DEF_FUNCTION_TYPE_VAR_2 | |
4049 | #undef DEF_FUNCTION_TYPE_VAR_3 | |
4050 | #undef DEF_FUNCTION_TYPE_VAR_4 | |
4051 | #undef DEF_FUNCTION_TYPE_VAR_5 | |
4052 | #undef DEF_POINTER_TYPE | |
4053 | builtin_types[(int) BT_LAST] = NULL_TREE; | |
4054 | ||
4055 | c_init_attributes (); | |
4056 | ||
4057 | #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P, \ | |
4058 | NONANSI_P, ATTRS, IMPLICIT, COND) \ | |
4059 | if (NAME && COND) \ | |
4060 | def_builtin_1 (ENUM, NAME, CLASS, \ | |
4061 | builtin_types[(int) TYPE], \ | |
4062 | builtin_types[(int) LIBTYPE], \ | |
4063 | BOTH_P, FALLBACK_P, NONANSI_P, \ | |
4064 | built_in_attributes[(int) ATTRS], IMPLICIT); | |
4065 | #include "builtins.def" | |
4066 | #undef DEF_BUILTIN | |
4067 | ||
8de7ef2a UB |
4068 | targetm.init_builtins (); |
4069 | ||
c6d86fce ILT |
4070 | build_common_builtin_nodes (); |
4071 | ||
c6d86fce ILT |
4072 | if (flag_mudflap) |
4073 | mudflap_init (); | |
4074 | } | |
4075 | ||
a0274e3e JJ |
4076 | /* Build tree nodes and builtin functions common to both C and C++ language |
4077 | frontends. */ | |
4078 | ||
4079 | void | |
4080 | c_common_nodes_and_builtins (void) | |
4081 | { | |
b6baa67d KVH |
4082 | int char16_type_size; |
4083 | int char32_type_size; | |
eaa7c03f JM |
4084 | int wchar_type_size; |
4085 | tree array_domain_type; | |
9f720c3e | 4086 | tree va_list_ref_type_node; |
daf68dd7 | 4087 | tree va_list_arg_type_node; |
d3707adb | 4088 | |
eaa7c03f | 4089 | /* Define `int' and `char' first so that dbx will output them first. */ |
6496a589 | 4090 | record_builtin_type (RID_INT, NULL, integer_type_node); |
eaa7c03f JM |
4091 | record_builtin_type (RID_CHAR, "char", char_type_node); |
4092 | ||
4093 | /* `signed' is the same as `int'. FIXME: the declarations of "signed", | |
4094 | "unsigned long", "long long unsigned" and "unsigned short" were in C++ | |
4095 | but not C. Are the conditionals here needed? */ | |
37fa72e9 | 4096 | if (c_dialect_cxx ()) |
6496a589 | 4097 | record_builtin_type (RID_SIGNED, NULL, integer_type_node); |
eaa7c03f JM |
4098 | record_builtin_type (RID_LONG, "long int", long_integer_type_node); |
4099 | record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); | |
4100 | record_builtin_type (RID_MAX, "long unsigned int", | |
4101 | long_unsigned_type_node); | |
37fa72e9 | 4102 | if (c_dialect_cxx ()) |
eaa7c03f JM |
4103 | record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); |
4104 | record_builtin_type (RID_MAX, "long long int", | |
4105 | long_long_integer_type_node); | |
4106 | record_builtin_type (RID_MAX, "long long unsigned int", | |
4107 | long_long_unsigned_type_node); | |
37fa72e9 | 4108 | if (c_dialect_cxx ()) |
eaa7c03f JM |
4109 | record_builtin_type (RID_MAX, "long long unsigned", |
4110 | long_long_unsigned_type_node); | |
4111 | record_builtin_type (RID_SHORT, "short int", short_integer_type_node); | |
4112 | record_builtin_type (RID_MAX, "short unsigned int", | |
4113 | short_unsigned_type_node); | |
37fa72e9 | 4114 | if (c_dialect_cxx ()) |
eaa7c03f JM |
4115 | record_builtin_type (RID_MAX, "unsigned short", |
4116 | short_unsigned_type_node); | |
4117 | ||
4118 | /* Define both `signed char' and `unsigned char'. */ | |
4119 | record_builtin_type (RID_MAX, "signed char", signed_char_type_node); | |
4120 | record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); | |
4121 | ||
b0c48229 NB |
4122 | /* These are types that c_common_type_for_size and |
4123 | c_common_type_for_mode use. */ | |
ae2bcd98 RS |
4124 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
4125 | intQI_type_node)); | |
4126 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4127 | intHI_type_node)); | |
4128 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4129 | intSI_type_node)); | |
4130 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4131 | intDI_type_node)); | |
eaa7c03f | 4132 | #if HOST_BITS_PER_WIDE_INT >= 64 |
1e1b8649 AP |
4133 | if (targetm.scalar_mode_supported_p (TImode)) |
4134 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4135 | get_identifier ("__int128_t"), | |
4136 | intTI_type_node)); | |
eaa7c03f | 4137 | #endif |
ae2bcd98 RS |
4138 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
4139 | unsigned_intQI_type_node)); | |
4140 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4141 | unsigned_intHI_type_node)); | |
4142 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4143 | unsigned_intSI_type_node)); | |
4144 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, | |
4145 | unsigned_intDI_type_node)); | |
eaa7c03f | 4146 | #if HOST_BITS_PER_WIDE_INT >= 64 |
1e1b8649 AP |
4147 | if (targetm.scalar_mode_supported_p (TImode)) |
4148 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4149 | get_identifier ("__uint128_t"), | |
4150 | unsigned_intTI_type_node)); | |
eaa7c03f JM |
4151 | #endif |
4152 | ||
4153 | /* Create the widest literal types. */ | |
4154 | widest_integer_literal_type_node | |
4155 | = make_signed_type (HOST_BITS_PER_WIDE_INT * 2); | |
ae2bcd98 RS |
4156 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
4157 | widest_integer_literal_type_node)); | |
eaa7c03f JM |
4158 | |
4159 | widest_unsigned_literal_type_node | |
4160 | = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2); | |
ae2bcd98 RS |
4161 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE, |
4162 | widest_unsigned_literal_type_node)); | |
eaa7c03f JM |
4163 | |
4164 | /* `unsigned long' is the standard type for sizeof. | |
4165 | Note that stddef.h uses `unsigned long', | |
4166 | and this must agree, even if long and int are the same size. */ | |
c9f8536c | 4167 | size_type_node = |
eaa7c03f | 4168 | TREE_TYPE (identifier_global_value (get_identifier (SIZE_TYPE))); |
c9f8536c MM |
4169 | signed_size_type_node = c_common_signed_type (size_type_node); |
4170 | set_sizetype (size_type_node); | |
eaa7c03f | 4171 | |
d1c38823 ZD |
4172 | pid_type_node = |
4173 | TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE))); | |
4174 | ||
eaa7c03f JM |
4175 | build_common_tree_nodes_2 (flag_short_double); |
4176 | ||
6496a589 KG |
4177 | record_builtin_type (RID_FLOAT, NULL, float_type_node); |
4178 | record_builtin_type (RID_DOUBLE, NULL, double_type_node); | |
eaa7c03f JM |
4179 | record_builtin_type (RID_MAX, "long double", long_double_type_node); |
4180 | ||
9a8ce21f JG |
4181 | /* Only supported decimal floating point extension if the target |
4182 | actually supports underlying modes. */ | |
4183 | if (targetm.scalar_mode_supported_p (SDmode) | |
4184 | && targetm.scalar_mode_supported_p (DDmode) | |
4185 | && targetm.scalar_mode_supported_p (TDmode)) | |
4186 | { | |
4187 | record_builtin_type (RID_DFLOAT32, NULL, dfloat32_type_node); | |
4188 | record_builtin_type (RID_DFLOAT64, NULL, dfloat64_type_node); | |
4189 | record_builtin_type (RID_DFLOAT128, NULL, dfloat128_type_node); | |
4190 | } | |
4191 | ||
ab22c1fa CF |
4192 | if (targetm.fixed_point_supported_p ()) |
4193 | { | |
4194 | record_builtin_type (RID_MAX, "short _Fract", short_fract_type_node); | |
4195 | record_builtin_type (RID_FRACT, NULL, fract_type_node); | |
4196 | record_builtin_type (RID_MAX, "long _Fract", long_fract_type_node); | |
4197 | record_builtin_type (RID_MAX, "long long _Fract", | |
4198 | long_long_fract_type_node); | |
4199 | record_builtin_type (RID_MAX, "unsigned short _Fract", | |
4200 | unsigned_short_fract_type_node); | |
4201 | record_builtin_type (RID_MAX, "unsigned _Fract", | |
4202 | unsigned_fract_type_node); | |
4203 | record_builtin_type (RID_MAX, "unsigned long _Fract", | |
4204 | unsigned_long_fract_type_node); | |
4205 | record_builtin_type (RID_MAX, "unsigned long long _Fract", | |
4206 | unsigned_long_long_fract_type_node); | |
4207 | record_builtin_type (RID_MAX, "_Sat short _Fract", | |
4208 | sat_short_fract_type_node); | |
4209 | record_builtin_type (RID_MAX, "_Sat _Fract", sat_fract_type_node); | |
4210 | record_builtin_type (RID_MAX, "_Sat long _Fract", | |
4211 | sat_long_fract_type_node); | |
4212 | record_builtin_type (RID_MAX, "_Sat long long _Fract", | |
4213 | sat_long_long_fract_type_node); | |
4214 | record_builtin_type (RID_MAX, "_Sat unsigned short _Fract", | |
4215 | sat_unsigned_short_fract_type_node); | |
4216 | record_builtin_type (RID_MAX, "_Sat unsigned _Fract", | |
4217 | sat_unsigned_fract_type_node); | |
4218 | record_builtin_type (RID_MAX, "_Sat unsigned long _Fract", | |
4219 | sat_unsigned_long_fract_type_node); | |
4220 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Fract", | |
4221 | sat_unsigned_long_long_fract_type_node); | |
4222 | record_builtin_type (RID_MAX, "short _Accum", short_accum_type_node); | |
4223 | record_builtin_type (RID_ACCUM, NULL, accum_type_node); | |
4224 | record_builtin_type (RID_MAX, "long _Accum", long_accum_type_node); | |
4225 | record_builtin_type (RID_MAX, "long long _Accum", | |
4226 | long_long_accum_type_node); | |
4227 | record_builtin_type (RID_MAX, "unsigned short _Accum", | |
4228 | unsigned_short_accum_type_node); | |
4229 | record_builtin_type (RID_MAX, "unsigned _Accum", | |
4230 | unsigned_accum_type_node); | |
4231 | record_builtin_type (RID_MAX, "unsigned long _Accum", | |
4232 | unsigned_long_accum_type_node); | |
4233 | record_builtin_type (RID_MAX, "unsigned long long _Accum", | |
4234 | unsigned_long_long_accum_type_node); | |
4235 | record_builtin_type (RID_MAX, "_Sat short _Accum", | |
4236 | sat_short_accum_type_node); | |
4237 | record_builtin_type (RID_MAX, "_Sat _Accum", sat_accum_type_node); | |
4238 | record_builtin_type (RID_MAX, "_Sat long _Accum", | |
4239 | sat_long_accum_type_node); | |
4240 | record_builtin_type (RID_MAX, "_Sat long long _Accum", | |
4241 | sat_long_long_accum_type_node); | |
4242 | record_builtin_type (RID_MAX, "_Sat unsigned short _Accum", | |
4243 | sat_unsigned_short_accum_type_node); | |
4244 | record_builtin_type (RID_MAX, "_Sat unsigned _Accum", | |
4245 | sat_unsigned_accum_type_node); | |
4246 | record_builtin_type (RID_MAX, "_Sat unsigned long _Accum", | |
4247 | sat_unsigned_long_accum_type_node); | |
4248 | record_builtin_type (RID_MAX, "_Sat unsigned long long _Accum", | |
4249 | sat_unsigned_long_long_accum_type_node); | |
4250 | ||
4251 | } | |
4252 | ||
ae2bcd98 RS |
4253 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, |
4254 | get_identifier ("complex int"), | |
4255 | complex_integer_type_node)); | |
4256 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4257 | get_identifier ("complex float"), | |
4258 | complex_float_type_node)); | |
4259 | lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, | |
4260 | get_identifier ("complex double"), | |
4261 | complex_double_type_node)); | |
4262 | lang_hooks.decls.pushdecl | |
43577e6b NB |
4263 | (build_decl (TYPE_DECL, get_identifier ("complex long double"), |
4264 | complex_long_double_type_node)); | |
eaa7c03f | 4265 | |
498c0f27 JJ |
4266 | if (c_dialect_cxx ()) |
4267 | /* For C++, make fileptr_type_node a distinct void * type until | |
4268 | FILE type is defined. */ | |
8dd16ecc | 4269 | fileptr_type_node = build_variant_type_copy (ptr_type_node); |
498c0f27 | 4270 | |
6496a589 | 4271 | record_builtin_type (RID_VOID, NULL, void_type_node); |
eaa7c03f | 4272 | |
06d40de8 DG |
4273 | /* Set the TYPE_NAME for any variants that were built before |
4274 | record_builtin_type gave names to the built-in types. */ | |
4275 | { | |
4276 | tree void_name = TYPE_NAME (void_type_node); | |
4277 | TYPE_NAME (void_type_node) = NULL_TREE; | |
4278 | TYPE_NAME (build_qualified_type (void_type_node, TYPE_QUAL_CONST)) | |
4279 | = void_name; | |
4280 | TYPE_NAME (void_type_node) = void_name; | |
4281 | } | |
4282 | ||
8c27b7d4 | 4283 | /* This node must not be shared. */ |
4a90aeeb | 4284 | void_zero_node = make_node (INTEGER_CST); |
10841285 MM |
4285 | TREE_TYPE (void_zero_node) = void_type_node; |
4286 | ||
eaa7c03f JM |
4287 | void_list_node = build_void_list_node (); |
4288 | ||
4289 | /* Make a type to be the domain of a few array types | |
4290 | whose domains don't really matter. | |
4291 | 200 is small enough that it always fits in size_t | |
4292 | and large enough that it can hold most function names for the | |
4293 | initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ | |
4294 | array_domain_type = build_index_type (size_int (200)); | |
4295 | ||
4296 | /* Make a type for arrays of characters. | |
4297 | With luck nothing will ever really depend on the length of this | |
4298 | array type. */ | |
4299 | char_array_type_node | |
4300 | = build_array_type (char_type_node, array_domain_type); | |
4301 | ||
4302 | /* Likewise for arrays of ints. */ | |
4303 | int_array_type_node | |
4304 | = build_array_type (integer_type_node, array_domain_type); | |
4305 | ||
10841285 MM |
4306 | string_type_node = build_pointer_type (char_type_node); |
4307 | const_string_type_node | |
4308 | = build_pointer_type (build_qualified_type | |
4309 | (char_type_node, TYPE_QUAL_CONST)); | |
4310 | ||
eaa7c03f | 4311 | /* This is special for C++ so functions can be overloaded. */ |
a11eba95 | 4312 | wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE); |
eaa7c03f JM |
4313 | wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node)); |
4314 | wchar_type_size = TYPE_PRECISION (wchar_type_node); | |
37fa72e9 | 4315 | if (c_dialect_cxx ()) |
eaa7c03f | 4316 | { |
8df83eae | 4317 | if (TYPE_UNSIGNED (wchar_type_node)) |
eaa7c03f JM |
4318 | wchar_type_node = make_unsigned_type (wchar_type_size); |
4319 | else | |
4320 | wchar_type_node = make_signed_type (wchar_type_size); | |
4321 | record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node); | |
4322 | } | |
4323 | else | |
4324 | { | |
ceef8ce4 | 4325 | signed_wchar_type_node = c_common_signed_type (wchar_type_node); |
12753674 | 4326 | unsigned_wchar_type_node = c_common_unsigned_type (wchar_type_node); |
eaa7c03f JM |
4327 | } |
4328 | ||
4329 | /* This is for wide string constants. */ | |
4330 | wchar_array_type_node | |
4331 | = build_array_type (wchar_type_node, array_domain_type); | |
4332 | ||
b6baa67d KVH |
4333 | /* Define 'char16_t'. */ |
4334 | char16_type_node = get_identifier (CHAR16_TYPE); | |
4335 | char16_type_node = TREE_TYPE (identifier_global_value (char16_type_node)); | |
4336 | char16_type_size = TYPE_PRECISION (char16_type_node); | |
4337 | if (c_dialect_cxx ()) | |
4338 | { | |
4339 | char16_type_node = make_unsigned_type (char16_type_size); | |
4340 | ||
4341 | if (cxx_dialect == cxx0x) | |
4342 | record_builtin_type (RID_CHAR16, "char16_t", char16_type_node); | |
4343 | } | |
4344 | ||
4345 | /* This is for UTF-16 string constants. */ | |
4346 | char16_array_type_node | |
4347 | = build_array_type (char16_type_node, array_domain_type); | |
4348 | ||
4349 | /* Define 'char32_t'. */ | |
4350 | char32_type_node = get_identifier (CHAR32_TYPE); | |
4351 | char32_type_node = TREE_TYPE (identifier_global_value (char32_type_node)); | |
4352 | char32_type_size = TYPE_PRECISION (char32_type_node); | |
4353 | if (c_dialect_cxx ()) | |
4354 | { | |
4355 | char32_type_node = make_unsigned_type (char32_type_size); | |
4356 | ||
4357 | if (cxx_dialect == cxx0x) | |
4358 | record_builtin_type (RID_CHAR32, "char32_t", char32_type_node); | |
4359 | } | |
4360 | ||
4361 | /* This is for UTF-32 string constants. */ | |
4362 | char32_array_type_node | |
4363 | = build_array_type (char32_type_node, array_domain_type); | |
4364 | ||
5fd8e536 JM |
4365 | wint_type_node = |
4366 | TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE))); | |
4367 | ||
4368 | intmax_type_node = | |
4369 | TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE))); | |
4370 | uintmax_type_node = | |
4371 | TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE))); | |
4372 | ||
4373 | default_function_type = build_function_type (integer_type_node, NULL_TREE); | |
4374 | ptrdiff_type_node | |
4375 | = TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE))); | |
12753674 | 4376 | unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node); |
5fd8e536 | 4377 | |
ae2bcd98 | 4378 | lang_hooks.decls.pushdecl |
43577e6b NB |
4379 | (build_decl (TYPE_DECL, get_identifier ("__builtin_va_list"), |
4380 | va_list_type_node)); | |
35cbb299 KT |
4381 | #ifdef TARGET_ENUM_VA_LIST |
4382 | { | |
4383 | int l; | |
4384 | const char *pname; | |
4385 | tree ptype; | |
4386 | for (l = 0; TARGET_ENUM_VA_LIST (l, &pname, &ptype); ++l) | |
4387 | { | |
4388 | lang_hooks.decls.pushdecl | |
4389 | (build_decl (TYPE_DECL, get_identifier (pname), | |
4390 | ptype)); | |
4391 | ||
4392 | } | |
4393 | } | |
4394 | #endif | |
daf68dd7 | 4395 | |
daf68dd7 | 4396 | if (TREE_CODE (va_list_type_node) == ARRAY_TYPE) |
9f720c3e GK |
4397 | { |
4398 | va_list_arg_type_node = va_list_ref_type_node = | |
4399 | build_pointer_type (TREE_TYPE (va_list_type_node)); | |
4400 | } | |
daf68dd7 | 4401 | else |
9f720c3e GK |
4402 | { |
4403 | va_list_arg_type_node = va_list_type_node; | |
4404 | va_list_ref_type_node = build_reference_type (va_list_type_node); | |
4405 | } | |
35b1a6fa | 4406 | |
c6d86fce ILT |
4407 | if (!flag_preprocess_only) |
4408 | c_define_builtins (va_list_ref_type_node, va_list_arg_type_node); | |
4677862a | 4409 | |
5b47282c | 4410 | main_identifier_node = get_identifier ("main"); |
b2f97e4a MM |
4411 | |
4412 | /* Create the built-in __null node. It is important that this is | |
4413 | not shared. */ | |
4414 | null_node = make_node (INTEGER_CST); | |
4415 | TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); | |
a0274e3e JJ |
4416 | |
4417 | /* Since builtin_types isn't gc'ed, don't export these nodes. */ | |
4418 | memset (builtin_types, 0, sizeof (builtin_types)); | |
7f4edbcb | 4419 | } |
d3707adb | 4420 | |
b482789c MA |
4421 | /* Look up the function in built_in_decls that corresponds to DECL |
4422 | and set ASMSPEC as its user assembler name. DECL must be a | |
6c6cfbfd | 4423 | function decl that declares a builtin. */ |
b482789c MA |
4424 | |
4425 | void | |
4426 | set_builtin_user_assembler_name (tree decl, const char *asmspec) | |
4427 | { | |
4428 | tree builtin; | |
4429 | gcc_assert (TREE_CODE (decl) == FUNCTION_DECL | |
4430 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
4431 | && asmspec != 0); | |
4432 | ||
4433 | builtin = built_in_decls [DECL_FUNCTION_CODE (decl)]; | |
4434 | set_user_assembler_name (builtin, asmspec); | |
4435 | if (DECL_FUNCTION_CODE (decl) == BUILT_IN_MEMCPY) | |
4436 | init_block_move_fn (asmspec); | |
4437 | else if (DECL_FUNCTION_CODE (decl) == BUILT_IN_MEMSET) | |
4438 | init_block_clear_fn (asmspec); | |
4439 | } | |
4440 | ||
3b2db49f MM |
4441 | /* The number of named compound-literals generated thus far. */ |
4442 | static GTY(()) int compound_literal_number; | |
4443 | ||
4444 | /* Set DECL_NAME for DECL, a VAR_DECL for a compound-literal. */ | |
4445 | ||
4446 | void | |
4447 | set_compound_literal_name (tree decl) | |
4448 | { | |
4449 | char *name; | |
4450 | ASM_FORMAT_PRIVATE_NAME (name, "__compound_literal", | |
4451 | compound_literal_number); | |
4452 | compound_literal_number++; | |
4453 | DECL_NAME (decl) = get_identifier (name); | |
4454 | } | |
4455 | ||
d3707adb | 4456 | tree |
35b1a6fa | 4457 | build_va_arg (tree expr, tree type) |
d3707adb RH |
4458 | { |
4459 | return build1 (VA_ARG_EXPR, type, expr); | |
4460 | } | |
fc2aaf30 JM |
4461 | |
4462 | ||
7d14c755 JM |
4463 | /* Linked list of disabled built-in functions. */ |
4464 | ||
4465 | typedef struct disabled_builtin | |
4466 | { | |
4467 | const char *name; | |
4468 | struct disabled_builtin *next; | |
4469 | } disabled_builtin; | |
4470 | static disabled_builtin *disabled_builtins = NULL; | |
4471 | ||
35b1a6fa | 4472 | static bool builtin_function_disabled_p (const char *); |
7d14c755 JM |
4473 | |
4474 | /* Disable a built-in function specified by -fno-builtin-NAME. If NAME | |
4475 | begins with "__builtin_", give an error. */ | |
4476 | ||
4477 | void | |
35b1a6fa | 4478 | disable_builtin_function (const char *name) |
7d14c755 JM |
4479 | { |
4480 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
bda67431 | 4481 | error ("cannot disable built-in function %qs", name); |
7d14c755 JM |
4482 | else |
4483 | { | |
1ad463f4 BI |
4484 | disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin); |
4485 | new_disabled_builtin->name = name; | |
4486 | new_disabled_builtin->next = disabled_builtins; | |
4487 | disabled_builtins = new_disabled_builtin; | |
7d14c755 JM |
4488 | } |
4489 | } | |
4490 | ||
4491 | ||
4492 | /* Return true if the built-in function NAME has been disabled, false | |
4493 | otherwise. */ | |
4494 | ||
4495 | static bool | |
35b1a6fa | 4496 | builtin_function_disabled_p (const char *name) |
7d14c755 JM |
4497 | { |
4498 | disabled_builtin *p; | |
4499 | for (p = disabled_builtins; p != NULL; p = p->next) | |
4500 | { | |
4501 | if (strcmp (name, p->name) == 0) | |
4502 | return true; | |
4503 | } | |
4504 | return false; | |
4505 | } | |
4506 | ||
4507 | ||
9bc15050 RG |
4508 | /* Worker for DEF_BUILTIN. |
4509 | Possibly define a builtin function with one or two names. | |
4510 | Does not declare a non-__builtin_ function if flag_no_builtin, or if | |
4511 | nonansi_p and flag_no_nonansi_builtin. */ | |
fc2aaf30 | 4512 | |
9bc15050 RG |
4513 | static void |
4514 | def_builtin_1 (enum built_in_function fncode, | |
4515 | const char *name, | |
4516 | enum built_in_class fnclass, | |
4517 | tree fntype, tree libtype, | |
4518 | bool both_p, bool fallback_p, bool nonansi_p, | |
4519 | tree fnattrs, bool implicit_p) | |
fc2aaf30 | 4520 | { |
9bc15050 RG |
4521 | tree decl; |
4522 | const char *libname; | |
4523 | ||
a0274e3e JJ |
4524 | if (fntype == error_mark_node) |
4525 | return; | |
4526 | ||
9bc15050 RG |
4527 | gcc_assert ((!both_p && !fallback_p) |
4528 | || !strncmp (name, "__builtin_", | |
4529 | strlen ("__builtin_"))); | |
4530 | ||
4531 | libname = name + strlen ("__builtin_"); | |
c79efc4d RÁE |
4532 | decl = add_builtin_function (name, fntype, fncode, fnclass, |
4533 | (fallback_p ? libname : NULL), | |
4534 | fnattrs); | |
9bc15050 RG |
4535 | if (both_p |
4536 | && !flag_no_builtin && !builtin_function_disabled_p (libname) | |
7d14c755 | 4537 | && !(nonansi_p && flag_no_nonansi_builtin)) |
c79efc4d RÁE |
4538 | add_builtin_function (libname, libtype, fncode, fnclass, |
4539 | NULL, fnattrs); | |
7f685e17 | 4540 | |
9bc15050 RG |
4541 | built_in_decls[(int) fncode] = decl; |
4542 | if (implicit_p) | |
4543 | implicit_built_in_decls[(int) fncode] = decl; | |
fc2aaf30 | 4544 | } |
c530479e | 4545 | \f |
d72040f5 RH |
4546 | /* Nonzero if the type T promotes to int. This is (nearly) the |
4547 | integral promotions defined in ISO C99 6.3.1.1/2. */ | |
4548 | ||
4549 | bool | |
58f9752a | 4550 | c_promoting_integer_type_p (const_tree t) |
d72040f5 RH |
4551 | { |
4552 | switch (TREE_CODE (t)) | |
4553 | { | |
4554 | case INTEGER_TYPE: | |
4555 | return (TYPE_MAIN_VARIANT (t) == char_type_node | |
4556 | || TYPE_MAIN_VARIANT (t) == signed_char_type_node | |
4557 | || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node | |
4558 | || TYPE_MAIN_VARIANT (t) == short_integer_type_node | |
c6c04fca RL |
4559 | || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node |
4560 | || TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node)); | |
d72040f5 RH |
4561 | |
4562 | case ENUMERAL_TYPE: | |
4563 | /* ??? Technically all enumerations not larger than an int | |
4564 | promote to an int. But this is used along code paths | |
4565 | that only want to notice a size change. */ | |
4566 | return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node); | |
4567 | ||
4568 | case BOOLEAN_TYPE: | |
4569 | return 1; | |
4570 | ||
4571 | default: | |
4572 | return 0; | |
4573 | } | |
4574 | } | |
4575 | ||
c530479e RH |
4576 | /* Return 1 if PARMS specifies a fixed number of parameters |
4577 | and none of their types is affected by default promotions. */ | |
4578 | ||
4579 | int | |
58f9752a | 4580 | self_promoting_args_p (const_tree parms) |
c530479e | 4581 | { |
58f9752a | 4582 | const_tree t; |
c530479e RH |
4583 | for (t = parms; t; t = TREE_CHAIN (t)) |
4584 | { | |
b3694847 | 4585 | tree type = TREE_VALUE (t); |
7e8176d7 | 4586 | |
694fea20 VR |
4587 | if (type == error_mark_node) |
4588 | continue; | |
4589 | ||
c530479e RH |
4590 | if (TREE_CHAIN (t) == 0 && type != void_type_node) |
4591 | return 0; | |
4592 | ||
4593 | if (type == 0) | |
4594 | return 0; | |
4595 | ||
4596 | if (TYPE_MAIN_VARIANT (type) == float_type_node) | |
4597 | return 0; | |
4598 | ||
d72040f5 | 4599 | if (c_promoting_integer_type_p (type)) |
c530479e RH |
4600 | return 0; |
4601 | } | |
4602 | return 1; | |
4603 | } | |
5eda3d66 | 4604 | |
12ea3302 GDR |
4605 | /* Recursively remove any '*' or '&' operator from TYPE. */ |
4606 | tree | |
4607 | strip_pointer_operator (tree t) | |
4608 | { | |
4609 | while (POINTER_TYPE_P (t)) | |
4610 | t = TREE_TYPE (t); | |
4611 | return t; | |
4612 | } | |
4613 | ||
ba992967 SP |
4614 | /* Recursively remove pointer or array type from TYPE. */ |
4615 | tree | |
4616 | strip_pointer_or_array_types (tree t) | |
4617 | { | |
4618 | while (TREE_CODE (t) == ARRAY_TYPE || POINTER_TYPE_P (t)) | |
4619 | t = TREE_TYPE (t); | |
4620 | return t; | |
4621 | } | |
4622 | ||
8f17b5c5 MM |
4623 | /* Used to compare case labels. K1 and K2 are actually tree nodes |
4624 | representing case labels, or NULL_TREE for a `default' label. | |
4625 | Returns -1 if K1 is ordered before K2, -1 if K1 is ordered after | |
4626 | K2, and 0 if K1 and K2 are equal. */ | |
4627 | ||
4628 | int | |
35b1a6fa | 4629 | case_compare (splay_tree_key k1, splay_tree_key k2) |
8f17b5c5 MM |
4630 | { |
4631 | /* Consider a NULL key (such as arises with a `default' label) to be | |
4632 | smaller than anything else. */ | |
4633 | if (!k1) | |
4634 | return k2 ? -1 : 0; | |
4635 | else if (!k2) | |
4636 | return k1 ? 1 : 0; | |
4637 | ||
4638 | return tree_int_cst_compare ((tree) k1, (tree) k2); | |
4639 | } | |
4640 | ||
4641 | /* Process a case label for the range LOW_VALUE ... HIGH_VALUE. If | |
4642 | LOW_VALUE and HIGH_VALUE are both NULL_TREE then this case label is | |
4643 | actually a `default' label. If only HIGH_VALUE is NULL_TREE, then | |
4644 | case label was declared using the usual C/C++ syntax, rather than | |
4645 | the GNU case range extension. CASES is a tree containing all the | |
4646 | case ranges processed so far; COND is the condition for the | |
8c161995 RH |
4647 | switch-statement itself. Returns the CASE_LABEL_EXPR created, or |
4648 | ERROR_MARK_NODE if no CASE_LABEL_EXPR is created. */ | |
8f17b5c5 MM |
4649 | |
4650 | tree | |
a6c0a76c SB |
4651 | c_add_case_label (splay_tree cases, tree cond, tree orig_type, |
4652 | tree low_value, tree high_value) | |
8f17b5c5 MM |
4653 | { |
4654 | tree type; | |
4655 | tree label; | |
4656 | tree case_label; | |
4657 | splay_tree_node node; | |
4658 | ||
4659 | /* Create the LABEL_DECL itself. */ | |
6de9cd9a | 4660 | label = create_artificial_label (); |
8f17b5c5 MM |
4661 | |
4662 | /* If there was an error processing the switch condition, bail now | |
4663 | before we get more confused. */ | |
4664 | if (!cond || cond == error_mark_node) | |
6de9cd9a | 4665 | goto error_out; |
8f17b5c5 | 4666 | |
35b1a6fa AJ |
4667 | if ((low_value && TREE_TYPE (low_value) |
4668 | && POINTER_TYPE_P (TREE_TYPE (low_value))) | |
8f17b5c5 MM |
4669 | || (high_value && TREE_TYPE (high_value) |
4670 | && POINTER_TYPE_P (TREE_TYPE (high_value)))) | |
522ddfa2 JM |
4671 | { |
4672 | error ("pointers are not permitted as case values"); | |
4673 | goto error_out; | |
4674 | } | |
8f17b5c5 MM |
4675 | |
4676 | /* Case ranges are a GNU extension. */ | |
fcf73884 MLI |
4677 | if (high_value) |
4678 | pedwarn (OPT_pedantic, | |
4679 | "range expressions in switch statements are non-standard"); | |
8f17b5c5 MM |
4680 | |
4681 | type = TREE_TYPE (cond); | |
4682 | if (low_value) | |
4683 | { | |
4684 | low_value = check_case_value (low_value); | |
4685 | low_value = convert_and_check (type, low_value); | |
c0e22534 NS |
4686 | if (low_value == error_mark_node) |
4687 | goto error_out; | |
8f17b5c5 MM |
4688 | } |
4689 | if (high_value) | |
4690 | { | |
4691 | high_value = check_case_value (high_value); | |
4692 | high_value = convert_and_check (type, high_value); | |
c0e22534 NS |
4693 | if (high_value == error_mark_node) |
4694 | goto error_out; | |
8f17b5c5 MM |
4695 | } |
4696 | ||
c0e22534 NS |
4697 | if (low_value && high_value) |
4698 | { | |
4699 | /* If the LOW_VALUE and HIGH_VALUE are the same, then this isn't | |
c22cacf3 MS |
4700 | really a case range, even though it was written that way. |
4701 | Remove the HIGH_VALUE to simplify later processing. */ | |
c0e22534 NS |
4702 | if (tree_int_cst_equal (low_value, high_value)) |
4703 | high_value = NULL_TREE; | |
4704 | else if (!tree_int_cst_lt (low_value, high_value)) | |
4705 | warning (0, "empty range specified"); | |
4706 | } | |
8f17b5c5 | 4707 | |
a6c0a76c SB |
4708 | /* See if the case is in range of the type of the original testing |
4709 | expression. If both low_value and high_value are out of range, | |
4710 | don't insert the case label and return NULL_TREE. */ | |
4711 | if (low_value | |
3f75a254 JM |
4712 | && !check_case_bounds (type, orig_type, |
4713 | &low_value, high_value ? &high_value : NULL)) | |
a6c0a76c SB |
4714 | return NULL_TREE; |
4715 | ||
8f17b5c5 MM |
4716 | /* Look up the LOW_VALUE in the table of case labels we already |
4717 | have. */ | |
4718 | node = splay_tree_lookup (cases, (splay_tree_key) low_value); | |
4719 | /* If there was not an exact match, check for overlapping ranges. | |
4720 | There's no need to do this if there's no LOW_VALUE or HIGH_VALUE; | |
4721 | that's a `default' label and the only overlap is an exact match. */ | |
4722 | if (!node && (low_value || high_value)) | |
4723 | { | |
4724 | splay_tree_node low_bound; | |
4725 | splay_tree_node high_bound; | |
4726 | ||
4727 | /* Even though there wasn't an exact match, there might be an | |
4728 | overlap between this case range and another case range. | |
4729 | Since we've (inductively) not allowed any overlapping case | |
4730 | ranges, we simply need to find the greatest low case label | |
4731 | that is smaller that LOW_VALUE, and the smallest low case | |
4732 | label that is greater than LOW_VALUE. If there is an overlap | |
4733 | it will occur in one of these two ranges. */ | |
4734 | low_bound = splay_tree_predecessor (cases, | |
4735 | (splay_tree_key) low_value); | |
4736 | high_bound = splay_tree_successor (cases, | |
4737 | (splay_tree_key) low_value); | |
4738 | ||
4739 | /* Check to see if the LOW_BOUND overlaps. It is smaller than | |
4740 | the LOW_VALUE, so there is no need to check unless the | |
4741 | LOW_BOUND is in fact itself a case range. */ | |
4742 | if (low_bound | |
4743 | && CASE_HIGH ((tree) low_bound->value) | |
4744 | && tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value), | |
4745 | low_value) >= 0) | |
4746 | node = low_bound; | |
4747 | /* Check to see if the HIGH_BOUND overlaps. The low end of that | |
4748 | range is bigger than the low end of the current range, so we | |
4749 | are only interested if the current range is a real range, and | |
4750 | not an ordinary case label. */ | |
35b1a6fa | 4751 | else if (high_bound |
8f17b5c5 MM |
4752 | && high_value |
4753 | && (tree_int_cst_compare ((tree) high_bound->key, | |
4754 | high_value) | |
4755 | <= 0)) | |
4756 | node = high_bound; | |
4757 | } | |
4758 | /* If there was an overlap, issue an error. */ | |
4759 | if (node) | |
4760 | { | |
8c161995 | 4761 | tree duplicate = CASE_LABEL ((tree) node->value); |
8f17b5c5 MM |
4762 | |
4763 | if (high_value) | |
4764 | { | |
4765 | error ("duplicate (or overlapping) case value"); | |
ddd2d57e | 4766 | error ("%Jthis is the first entry overlapping that value", duplicate); |
8f17b5c5 MM |
4767 | } |
4768 | else if (low_value) | |
4769 | { | |
4770 | error ("duplicate case value") ; | |
ddd2d57e | 4771 | error ("%Jpreviously used here", duplicate); |
8f17b5c5 MM |
4772 | } |
4773 | else | |
4774 | { | |
4775 | error ("multiple default labels in one switch"); | |
ddd2d57e | 4776 | error ("%Jthis is the first default label", duplicate); |
8f17b5c5 | 4777 | } |
6de9cd9a | 4778 | goto error_out; |
8f17b5c5 MM |
4779 | } |
4780 | ||
4781 | /* Add a CASE_LABEL to the statement-tree. */ | |
4782 | case_label = add_stmt (build_case_label (low_value, high_value, label)); | |
4783 | /* Register this case label in the splay tree. */ | |
35b1a6fa | 4784 | splay_tree_insert (cases, |
8f17b5c5 MM |
4785 | (splay_tree_key) low_value, |
4786 | (splay_tree_value) case_label); | |
4787 | ||
4788 | return case_label; | |
6de9cd9a DN |
4789 | |
4790 | error_out: | |
9e14e18f | 4791 | /* Add a label so that the back-end doesn't think that the beginning of |
6de9cd9a | 4792 | the switch is unreachable. Note that we do not add a case label, as |
41806d92 | 4793 | that just leads to duplicates and thence to failure later on. */ |
6de9cd9a DN |
4794 | if (!cases->root) |
4795 | { | |
4796 | tree t = create_artificial_label (); | |
9e14e18f | 4797 | add_stmt (build_stmt (LABEL_EXPR, t)); |
6de9cd9a DN |
4798 | } |
4799 | return error_mark_node; | |
4800 | } | |
4801 | ||
4802 | /* Subroutines of c_do_switch_warnings, called via splay_tree_foreach. | |
4803 | Used to verify that case values match up with enumerator values. */ | |
4804 | ||
4805 | static void | |
4806 | match_case_to_enum_1 (tree key, tree type, tree label) | |
4807 | { | |
4808 | char buf[2 + 2*HOST_BITS_PER_WIDE_INT/4 + 1]; | |
4809 | ||
4810 | /* ??? Not working too hard to print the double-word value. | |
4811 | Should perhaps be done with %lwd in the diagnostic routines? */ | |
4812 | if (TREE_INT_CST_HIGH (key) == 0) | |
4813 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_UNSIGNED, | |
4814 | TREE_INT_CST_LOW (key)); | |
4815 | else if (!TYPE_UNSIGNED (type) | |
4816 | && TREE_INT_CST_HIGH (key) == -1 | |
4817 | && TREE_INT_CST_LOW (key) != 0) | |
4818 | snprintf (buf, sizeof (buf), "-" HOST_WIDE_INT_PRINT_UNSIGNED, | |
4819 | -TREE_INT_CST_LOW (key)); | |
4820 | else | |
4821 | snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_DOUBLE_HEX, | |
3d57d7ce DK |
4822 | (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (key), |
4823 | (unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (key)); | |
6de9cd9a DN |
4824 | |
4825 | if (TYPE_NAME (type) == 0) | |
683d6ff9 MLI |
4826 | warning (warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, |
4827 | "%Jcase value %qs not in enumerated type", | |
8c161995 | 4828 | CASE_LABEL (label), buf); |
6de9cd9a | 4829 | else |
683d6ff9 MLI |
4830 | warning (warn_switch ? OPT_Wswitch : OPT_Wswitch_enum, |
4831 | "%Jcase value %qs not in enumerated type %qT", | |
8c161995 | 4832 | CASE_LABEL (label), buf, type); |
6de9cd9a DN |
4833 | } |
4834 | ||
c782c2fe RS |
4835 | /* Subroutine of c_do_switch_warnings, called via splay_tree_foreach. |
4836 | Used to verify that case values match up with enumerator values. */ | |
4837 | ||
6de9cd9a DN |
4838 | static int |
4839 | match_case_to_enum (splay_tree_node node, void *data) | |
4840 | { | |
4841 | tree label = (tree) node->value; | |
28dab132 | 4842 | tree type = (tree) data; |
6de9cd9a DN |
4843 | |
4844 | /* Skip default case. */ | |
4845 | if (!CASE_LOW (label)) | |
4846 | return 0; | |
4847 | ||
c782c2fe | 4848 | /* If CASE_LOW_SEEN is not set, that means CASE_LOW did not appear |
6de9cd9a | 4849 | when we did our enum->case scan. Reset our scratch bit after. */ |
c782c2fe | 4850 | if (!CASE_LOW_SEEN (label)) |
6de9cd9a DN |
4851 | match_case_to_enum_1 (CASE_LOW (label), type, label); |
4852 | else | |
c782c2fe | 4853 | CASE_LOW_SEEN (label) = 0; |
6de9cd9a | 4854 | |
c782c2fe RS |
4855 | /* If CASE_HIGH is non-null, we have a range. If CASE_HIGH_SEEN is |
4856 | not set, that means that CASE_HIGH did not appear when we did our | |
4857 | enum->case scan. Reset our scratch bit after. */ | |
6de9cd9a DN |
4858 | if (CASE_HIGH (label)) |
4859 | { | |
c782c2fe RS |
4860 | if (!CASE_HIGH_SEEN (label)) |
4861 | match_case_to_enum_1 (CASE_HIGH (label), type, label); | |
4862 | else | |
4863 | CASE_HIGH_SEEN (label) = 0; | |
6de9cd9a DN |
4864 | } |
4865 | ||
4866 | return 0; | |
4867 | } | |
4868 | ||
fbc315db ILT |
4869 | /* Handle -Wswitch*. Called from the front end after parsing the |
4870 | switch construct. */ | |
4871 | /* ??? Should probably be somewhere generic, since other languages | |
4872 | besides C and C++ would want this. At the moment, however, C/C++ | |
4873 | are the only tree-ssa languages that support enumerations at all, | |
4874 | so the point is moot. */ | |
6de9cd9a | 4875 | |
fbc315db ILT |
4876 | void |
4877 | c_do_switch_warnings (splay_tree cases, location_t switch_location, | |
4878 | tree type, tree cond) | |
6de9cd9a | 4879 | { |
9f63daea | 4880 | splay_tree_node default_node; |
c782c2fe RS |
4881 | splay_tree_node node; |
4882 | tree chain; | |
683d6ff9 | 4883 | int saved_warn_switch; |
6de9cd9a DN |
4884 | |
4885 | if (!warn_switch && !warn_switch_enum && !warn_switch_default) | |
4886 | return; | |
4887 | ||
6de9cd9a | 4888 | default_node = splay_tree_lookup (cases, (splay_tree_key) NULL); |
44c21c7f DD |
4889 | if (!default_node) |
4890 | warning (OPT_Wswitch_default, "%Hswitch missing default case", | |
4891 | &switch_location); | |
6de9cd9a | 4892 | |
c782c2fe RS |
4893 | /* From here on, we only care about about enumerated types. */ |
4894 | if (!type || TREE_CODE (type) != ENUMERAL_TYPE) | |
4895 | return; | |
4896 | ||
6de9cd9a DN |
4897 | /* If the switch expression was an enumerated type, check that |
4898 | exactly all enumeration literals are covered by the cases. | |
4899 | The check is made when -Wswitch was specified and there is no | |
4900 | default case, or when -Wswitch-enum was specified. */ | |
6de9cd9a | 4901 | |
c782c2fe RS |
4902 | if (!warn_switch_enum |
4903 | && !(warn_switch && !default_node)) | |
4904 | return; | |
4905 | ||
4906 | /* Clearing COND if it is not an integer constant simplifies | |
4907 | the tests inside the loop below. */ | |
4908 | if (TREE_CODE (cond) != INTEGER_CST) | |
4909 | cond = NULL_TREE; | |
4910 | ||
4911 | /* The time complexity here is O(N*lg(N)) worst case, but for the | |
4912 | common case of monotonically increasing enumerators, it is | |
4913 | O(N), since the nature of the splay tree will keep the next | |
4914 | element adjacent to the root at all times. */ | |
6de9cd9a | 4915 | |
c782c2fe RS |
4916 | for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain)) |
4917 | { | |
4918 | tree value = TREE_VALUE (chain); | |
4919 | node = splay_tree_lookup (cases, (splay_tree_key) value); | |
4920 | if (node) | |
6de9cd9a | 4921 | { |
c782c2fe RS |
4922 | /* Mark the CASE_LOW part of the case entry as seen. */ |
4923 | tree label = (tree) node->value; | |
4924 | CASE_LOW_SEEN (label) = 1; | |
4925 | continue; | |
4926 | } | |
4927 | ||
4928 | /* Even though there wasn't an exact match, there might be a | |
fa10beec | 4929 | case range which includes the enumerator's value. */ |
c782c2fe RS |
4930 | node = splay_tree_predecessor (cases, (splay_tree_key) value); |
4931 | if (node && CASE_HIGH ((tree) node->value)) | |
4932 | { | |
4933 | tree label = (tree) node->value; | |
4934 | int cmp = tree_int_cst_compare (CASE_HIGH (label), value); | |
4935 | if (cmp >= 0) | |
6de9cd9a | 4936 | { |
c782c2fe RS |
4937 | /* If we match the upper bound exactly, mark the CASE_HIGH |
4938 | part of the case entry as seen. */ | |
4939 | if (cmp == 0) | |
4940 | CASE_HIGH_SEEN (label) = 1; | |
4941 | continue; | |
6de9cd9a DN |
4942 | } |
4943 | } | |
4944 | ||
c782c2fe RS |
4945 | /* We've now determined that this enumerated literal isn't |
4946 | handled by the case labels of the switch statement. */ | |
6de9cd9a | 4947 | |
c782c2fe RS |
4948 | /* If the switch expression is a constant, we only really care |
4949 | about whether that constant is handled by the switch. */ | |
4950 | if (cond && tree_int_cst_compare (cond, value)) | |
4951 | continue; | |
6de9cd9a | 4952 | |
683d6ff9 MLI |
4953 | /* If there is a default_node, the only relevant option is |
4954 | Wswitch-enum. Otherwise, if both are enabled then we prefer | |
4955 | to warn using -Wswitch because -Wswitch is enabled by -Wall | |
4956 | while -Wswitch-enum is explicit. */ | |
4957 | warning ((default_node || !warn_switch) | |
4958 | ? OPT_Wswitch_enum : OPT_Wswitch, | |
4959 | "%Henumeration value %qE not handled in switch", | |
c782c2fe | 4960 | &switch_location, TREE_PURPOSE (chain)); |
6de9cd9a | 4961 | } |
c782c2fe RS |
4962 | |
4963 | /* Warn if there are case expressions that don't correspond to | |
4964 | enumerators. This can occur since C and C++ don't enforce | |
4965 | type-checking of assignments to enumeration variables. | |
4966 | ||
4967 | The time complexity here is now always O(N) worst case, since | |
4968 | we should have marked both the lower bound and upper bound of | |
4969 | every disjoint case label, with CASE_LOW_SEEN and CASE_HIGH_SEEN | |
4970 | above. This scan also resets those fields. */ | |
683d6ff9 MLI |
4971 | |
4972 | /* If there is a default_node, the only relevant option is | |
4973 | Wswitch-enum. Otherwise, if both are enabled then we prefer | |
4974 | to warn using -Wswitch because -Wswitch is enabled by -Wall | |
4975 | while -Wswitch-enum is explicit. */ | |
4976 | saved_warn_switch = warn_switch; | |
4977 | if (default_node) | |
4978 | warn_switch = 0; | |
c782c2fe | 4979 | splay_tree_foreach (cases, match_case_to_enum, type); |
683d6ff9 MLI |
4980 | warn_switch = saved_warn_switch; |
4981 | ||
8f17b5c5 MM |
4982 | } |
4983 | ||
6b665219 MM |
4984 | /* Finish an expression taking the address of LABEL (an |
4985 | IDENTIFIER_NODE). Returns an expression for the address. */ | |
15b732b2 | 4986 | |
35b1a6fa AJ |
4987 | tree |
4988 | finish_label_address_expr (tree label) | |
15b732b2 NB |
4989 | { |
4990 | tree result; | |
4991 | ||
fcf73884 | 4992 | pedwarn (OPT_pedantic, "taking the address of a label is non-standard"); |
15b732b2 | 4993 | |
6b665219 MM |
4994 | if (label == error_mark_node) |
4995 | return error_mark_node; | |
4996 | ||
15b732b2 NB |
4997 | label = lookup_label (label); |
4998 | if (label == NULL_TREE) | |
4999 | result = null_pointer_node; | |
5000 | else | |
5001 | { | |
5002 | TREE_USED (label) = 1; | |
5003 | result = build1 (ADDR_EXPR, ptr_type_node, label); | |
15b732b2 NB |
5004 | /* The current function in not necessarily uninlinable. |
5005 | Computed gotos are incompatible with inlining, but the value | |
5006 | here could be used only in a diagnostic, for example. */ | |
5007 | } | |
5008 | ||
5009 | return result; | |
5010 | } | |
5011 | ||
8f17b5c5 | 5012 | /* Hook used by expand_expr to expand language-specific tree codes. */ |
9f63daea | 5013 | /* The only things that should go here are bits needed to expand |
1ea7e6ad | 5014 | constant initializers. Everything else should be handled by the |
6de9cd9a | 5015 | gimplification routines. */ |
8f17b5c5 MM |
5016 | |
5017 | rtx | |
9f63daea | 5018 | c_expand_expr (tree exp, rtx target, enum machine_mode tmode, |
d75d71e0 | 5019 | int modifiera /* Actually enum expand_modifier. */, |
0fab64a3 | 5020 | rtx *alt_rtl) |
8f17b5c5 | 5021 | { |
d75d71e0 | 5022 | enum expand_modifier modifier = (enum expand_modifier) modifiera; |
8f17b5c5 MM |
5023 | switch (TREE_CODE (exp)) |
5024 | { | |
db3acfa5 JM |
5025 | case COMPOUND_LITERAL_EXPR: |
5026 | { | |
5027 | /* Initialize the anonymous variable declared in the compound | |
5028 | literal, then return the variable. */ | |
5029 | tree decl = COMPOUND_LITERAL_EXPR_DECL (exp); | |
5030 | emit_local_var (decl); | |
0fab64a3 | 5031 | return expand_expr_real (decl, target, tmode, modifier, alt_rtl); |
db3acfa5 JM |
5032 | } |
5033 | ||
8f17b5c5 | 5034 | default: |
366de0ce | 5035 | gcc_unreachable (); |
8f17b5c5 | 5036 | } |
8f17b5c5 MM |
5037 | } |
5038 | ||
270c60bb DB |
5039 | /* Hook used by staticp to handle language-specific tree codes. */ |
5040 | ||
5041 | tree | |
5042 | c_staticp (tree exp) | |
5043 | { | |
5044 | return (TREE_CODE (exp) == COMPOUND_LITERAL_EXPR | |
5045 | && TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (exp)) | |
5046 | ? exp : NULL); | |
5047 | } | |
19552aa5 JM |
5048 | \f |
5049 | ||
5050 | /* Given a boolean expression ARG, return a tree representing an increment | |
5051 | or decrement (as indicated by CODE) of ARG. The front end must check for | |
5052 | invalid cases (e.g., decrement in C++). */ | |
5053 | tree | |
35b1a6fa | 5054 | boolean_increment (enum tree_code code, tree arg) |
19552aa5 JM |
5055 | { |
5056 | tree val; | |
b5119fa1 | 5057 | tree true_res = build_int_cst (TREE_TYPE (arg), 1); |
37fa72e9 | 5058 | |
19552aa5 JM |
5059 | arg = stabilize_reference (arg); |
5060 | switch (code) | |
5061 | { | |
5062 | case PREINCREMENT_EXPR: | |
53fb4de3 | 5063 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 JM |
5064 | break; |
5065 | case POSTINCREMENT_EXPR: | |
53fb4de3 | 5066 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res); |
19552aa5 | 5067 | arg = save_expr (arg); |
53fb4de3 RS |
5068 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5069 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
5070 | break; |
5071 | case PREDECREMENT_EXPR: | |
53fb4de3 RS |
5072 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
5073 | invert_truthvalue (arg)); | |
19552aa5 JM |
5074 | break; |
5075 | case POSTDECREMENT_EXPR: | |
53fb4de3 RS |
5076 | val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, |
5077 | invert_truthvalue (arg)); | |
19552aa5 | 5078 | arg = save_expr (arg); |
53fb4de3 RS |
5079 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg); |
5080 | val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val); | |
19552aa5 JM |
5081 | break; |
5082 | default: | |
366de0ce | 5083 | gcc_unreachable (); |
19552aa5 JM |
5084 | } |
5085 | TREE_SIDE_EFFECTS (val) = 1; | |
5086 | return val; | |
5087 | } | |
03dc0325 | 5088 | \f |
cb60f38d NB |
5089 | /* Built-in macros for stddef.h, that require macros defined in this |
5090 | file. */ | |
460bd0e3 | 5091 | void |
35b1a6fa | 5092 | c_stddef_cpp_builtins(void) |
3df89291 | 5093 | { |
5279d739 ZW |
5094 | builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0); |
5095 | builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0); | |
5096 | builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0); | |
5097 | builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0); | |
85291069 JM |
5098 | builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0); |
5099 | builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0); | |
c466b2cd KVH |
5100 | builtin_define_with_value ("__CHAR16_TYPE__", CHAR16_TYPE, 0); |
5101 | builtin_define_with_value ("__CHAR32_TYPE__", CHAR32_TYPE, 0); | |
676997cf RH |
5102 | } |
5103 | ||
6431177a | 5104 | static void |
35b1a6fa | 5105 | c_init_attributes (void) |
6431177a JM |
5106 | { |
5107 | /* Fill in the built_in_attributes array. */ | |
4a90aeeb | 5108 | #define DEF_ATTR_NULL_TREE(ENUM) \ |
6431177a | 5109 | built_in_attributes[(int) ENUM] = NULL_TREE; |
4a90aeeb | 5110 | #define DEF_ATTR_INT(ENUM, VALUE) \ |
7d60be94 | 5111 | built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE); |
6431177a JM |
5112 | #define DEF_ATTR_IDENT(ENUM, STRING) \ |
5113 | built_in_attributes[(int) ENUM] = get_identifier (STRING); | |
5114 | #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \ | |
5115 | built_in_attributes[(int) ENUM] \ | |
5116 | = tree_cons (built_in_attributes[(int) PURPOSE], \ | |
5117 | built_in_attributes[(int) VALUE], \ | |
5118 | built_in_attributes[(int) CHAIN]); | |
6431177a JM |
5119 | #include "builtin-attrs.def" |
5120 | #undef DEF_ATTR_NULL_TREE | |
5121 | #undef DEF_ATTR_INT | |
5122 | #undef DEF_ATTR_IDENT | |
5123 | #undef DEF_ATTR_TREE_LIST | |
03dc0325 | 5124 | } |
26f943fd | 5125 | |
349ae713 NB |
5126 | /* Attribute handlers common to C front ends. */ |
5127 | ||
5128 | /* Handle a "packed" attribute; arguments as in | |
5129 | struct attribute_spec.handler. */ | |
5130 | ||
5131 | static tree | |
e18476eb | 5132 | handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
a742c759 | 5133 | int flags, bool *no_add_attrs) |
349ae713 | 5134 | { |
c6e4cc53 | 5135 | if (TYPE_P (*node)) |
349ae713 NB |
5136 | { |
5137 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 5138 | *node = build_variant_type_copy (*node); |
c6e4cc53 | 5139 | TYPE_PACKED (*node) = 1; |
349ae713 NB |
5140 | } |
5141 | else if (TREE_CODE (*node) == FIELD_DECL) | |
646c0835 NS |
5142 | { |
5143 | if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT) | |
5144 | warning (OPT_Wattributes, | |
5145 | "%qE attribute ignored for field of type %qT", | |
5146 | name, TREE_TYPE (*node)); | |
5147 | else | |
5148 | DECL_PACKED (*node) = 1; | |
5149 | } | |
349ae713 | 5150 | /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
c6e4cc53 NS |
5151 | used for DECL_REGISTER. It wouldn't mean anything anyway. |
5152 | We can't set DECL_PACKED on the type of a TYPE_DECL, because | |
5153 | that changes what the typedef is typing. */ | |
349ae713 NB |
5154 | else |
5155 | { | |
5c498b10 | 5156 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5157 | *no_add_attrs = true; |
5158 | } | |
5159 | ||
5160 | return NULL_TREE; | |
5161 | } | |
5162 | ||
5163 | /* Handle a "nocommon" attribute; arguments as in | |
5164 | struct attribute_spec.handler. */ | |
5165 | ||
5166 | static tree | |
35b1a6fa | 5167 | handle_nocommon_attribute (tree *node, tree name, |
e18476eb BI |
5168 | tree ARG_UNUSED (args), |
5169 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5170 | { |
5171 | if (TREE_CODE (*node) == VAR_DECL) | |
5172 | DECL_COMMON (*node) = 0; | |
5173 | else | |
5174 | { | |
5c498b10 | 5175 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5176 | *no_add_attrs = true; |
5177 | } | |
5178 | ||
5179 | return NULL_TREE; | |
5180 | } | |
5181 | ||
5182 | /* Handle a "common" attribute; arguments as in | |
5183 | struct attribute_spec.handler. */ | |
5184 | ||
5185 | static tree | |
e18476eb BI |
5186 | handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5187 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5188 | { |
5189 | if (TREE_CODE (*node) == VAR_DECL) | |
5190 | DECL_COMMON (*node) = 1; | |
5191 | else | |
5192 | { | |
5c498b10 | 5193 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5194 | *no_add_attrs = true; |
5195 | } | |
5196 | ||
5197 | return NULL_TREE; | |
5198 | } | |
5199 | ||
5200 | /* Handle a "noreturn" attribute; arguments as in | |
5201 | struct attribute_spec.handler. */ | |
5202 | ||
5203 | static tree | |
e18476eb BI |
5204 | handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5205 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5206 | { |
5207 | tree type = TREE_TYPE (*node); | |
5208 | ||
5209 | /* See FIXME comment in c_common_attribute_table. */ | |
5210 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5211 | TREE_THIS_VOLATILE (*node) = 1; | |
5212 | else if (TREE_CODE (type) == POINTER_TYPE | |
5213 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
5214 | TREE_TYPE (*node) | |
5215 | = build_pointer_type | |
5216 | (build_type_variant (TREE_TYPE (type), | |
c29726e2 | 5217 | TYPE_READONLY (TREE_TYPE (type)), 1)); |
349ae713 NB |
5218 | else |
5219 | { | |
5c498b10 | 5220 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5221 | *no_add_attrs = true; |
5222 | } | |
5223 | ||
5224 | return NULL_TREE; | |
5225 | } | |
5226 | ||
52bf96d2 JH |
5227 | /* Handle a "hot" and attribute; arguments as in |
5228 | struct attribute_spec.handler. */ | |
5229 | ||
5230 | static tree | |
5231 | handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
ab442df7 | 5232 | int ARG_UNUSED (flags), bool *no_add_attrs) |
52bf96d2 JH |
5233 | { |
5234 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5235 | { | |
5236 | if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) | |
5237 | { | |
5238 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5239 | name, "cold"); | |
5240 | *no_add_attrs = true; | |
5241 | } | |
ab442df7 MM |
5242 | else |
5243 | { | |
5244 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
5245 | ||
5246 | /* If we are not at -O3, but are optimizing, turn on -O3 | |
5247 | optimizations just for this one function. */ | |
5248 | if (((optimize > 0 && optimize < 3) || optimize_size) | |
a51fa0f4 | 5249 | && targetm.target_option.hot_attribute_sets_optimization |
ab442df7 MM |
5250 | && (!old_opts || old_opts == optimization_default_node)) |
5251 | { | |
5252 | /* Create the hot optimization node if needed. */ | |
5253 | if (!optimization_hot_node) | |
5254 | { | |
5255 | struct cl_optimization current_options; | |
5256 | static const char *os_argv[] = { NULL, "-O3", NULL }; | |
5257 | ||
5258 | cl_optimization_save (¤t_options); | |
5259 | decode_options (2, os_argv); | |
5260 | optimization_hot_node = build_optimization_node (); | |
5261 | cl_optimization_restore (¤t_options); | |
5262 | } | |
5263 | ||
5264 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
5265 | = optimization_hot_node; | |
5266 | } | |
a51fa0f4 MM |
5267 | /* Most of the rest of the hot processing is done later with |
5268 | lookup_attribute. */ | |
ab442df7 | 5269 | } |
52bf96d2 JH |
5270 | } |
5271 | else | |
5272 | { | |
5273 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5274 | *no_add_attrs = true; | |
5275 | } | |
5276 | ||
5277 | return NULL_TREE; | |
5278 | } | |
5279 | /* Handle a "cold" and attribute; arguments as in | |
5280 | struct attribute_spec.handler. */ | |
5281 | ||
5282 | static tree | |
5283 | handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
5284 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5285 | { | |
5286 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5287 | { | |
5288 | if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) | |
5289 | { | |
5290 | warning (OPT_Wattributes, "%qE attribute conflicts with attribute %s", | |
5291 | name, "hot"); | |
5292 | *no_add_attrs = true; | |
5293 | } | |
ab442df7 MM |
5294 | else |
5295 | { | |
5296 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
5297 | ||
5298 | /* If we are optimizing, but not optimizing for space, turn on -Os | |
5299 | optimizations just for this one function. */ | |
5300 | if (optimize && !optimize_size | |
a51fa0f4 | 5301 | && targetm.target_option.cold_attribute_sets_optimization |
ab442df7 MM |
5302 | && (!old_opts || old_opts == optimization_default_node)) |
5303 | { | |
5304 | /* Create the cold optimization node if needed. */ | |
5305 | if (!optimization_cold_node) | |
5306 | { | |
5307 | struct cl_optimization current_options; | |
5308 | static const char *os_argv[] = { NULL, "-Os", NULL }; | |
5309 | ||
5310 | cl_optimization_save (¤t_options); | |
5311 | decode_options (2, os_argv); | |
5312 | optimization_cold_node = build_optimization_node (); | |
5313 | cl_optimization_restore (¤t_options); | |
5314 | } | |
5315 | ||
5316 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
5317 | = optimization_cold_node; | |
5318 | } | |
a51fa0f4 MM |
5319 | /* Most of the rest of the cold processing is done later with |
5320 | lookup_attribute. */ | |
ab442df7 | 5321 | } |
52bf96d2 JH |
5322 | } |
5323 | else | |
5324 | { | |
5325 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5326 | *no_add_attrs = true; | |
5327 | } | |
5328 | ||
5329 | return NULL_TREE; | |
5330 | } | |
5331 | ||
349ae713 NB |
5332 | /* Handle a "noinline" attribute; arguments as in |
5333 | struct attribute_spec.handler. */ | |
5334 | ||
5335 | static tree | |
35b1a6fa | 5336 | handle_noinline_attribute (tree *node, tree name, |
e18476eb BI |
5337 | tree ARG_UNUSED (args), |
5338 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5339 | { |
5340 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5341 | DECL_UNINLINABLE (*node) = 1; | |
5342 | else | |
5343 | { | |
5c498b10 | 5344 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5345 | *no_add_attrs = true; |
5346 | } | |
5347 | ||
5348 | return NULL_TREE; | |
5349 | } | |
5350 | ||
5351 | /* Handle a "always_inline" attribute; arguments as in | |
5352 | struct attribute_spec.handler. */ | |
5353 | ||
5354 | static tree | |
35b1a6fa | 5355 | handle_always_inline_attribute (tree *node, tree name, |
e18476eb BI |
5356 | tree ARG_UNUSED (args), |
5357 | int ARG_UNUSED (flags), | |
a742c759 | 5358 | bool *no_add_attrs) |
349ae713 NB |
5359 | { |
5360 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5361 | { | |
c536a6a7 RG |
5362 | /* Set the attribute and mark it for disregarding inline |
5363 | limits. */ | |
5364 | DECL_DISREGARD_INLINE_LIMITS (*node) = 1; | |
349ae713 NB |
5365 | } |
5366 | else | |
5367 | { | |
5c498b10 | 5368 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 | 5369 | *no_add_attrs = true; |
4eb7fd83 JJ |
5370 | } |
5371 | ||
5372 | return NULL_TREE; | |
5373 | } | |
5374 | ||
5375 | /* Handle a "gnu_inline" attribute; arguments as in | |
5376 | struct attribute_spec.handler. */ | |
5377 | ||
5378 | static tree | |
5379 | handle_gnu_inline_attribute (tree *node, tree name, | |
5380 | tree ARG_UNUSED (args), | |
5381 | int ARG_UNUSED (flags), | |
5382 | bool *no_add_attrs) | |
5383 | { | |
5384 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5385 | { | |
5386 | /* Do nothing else, just set the attribute. We'll get at | |
5387 | it later with lookup_attribute. */ | |
5388 | } | |
5389 | else | |
5390 | { | |
5391 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5392 | *no_add_attrs = true; | |
349ae713 NB |
5393 | } |
5394 | ||
5395 | return NULL_TREE; | |
5396 | } | |
5397 | ||
d752cfdb JJ |
5398 | /* Handle an "artificial" attribute; arguments as in |
5399 | struct attribute_spec.handler. */ | |
5400 | ||
5401 | static tree | |
5402 | handle_artificial_attribute (tree *node, tree name, | |
5403 | tree ARG_UNUSED (args), | |
5404 | int ARG_UNUSED (flags), | |
5405 | bool *no_add_attrs) | |
5406 | { | |
5407 | if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) | |
5408 | { | |
5409 | /* Do nothing else, just set the attribute. We'll get at | |
5410 | it later with lookup_attribute. */ | |
5411 | } | |
5412 | else | |
5413 | { | |
5414 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5415 | *no_add_attrs = true; | |
5416 | } | |
5417 | ||
5418 | return NULL_TREE; | |
5419 | } | |
5420 | ||
0691d1d4 RG |
5421 | /* Handle a "flatten" attribute; arguments as in |
5422 | struct attribute_spec.handler. */ | |
5423 | ||
5424 | static tree | |
5425 | handle_flatten_attribute (tree *node, tree name, | |
c22cacf3 MS |
5426 | tree args ATTRIBUTE_UNUSED, |
5427 | int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) | |
0691d1d4 RG |
5428 | { |
5429 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5430 | /* Do nothing else, just set the attribute. We'll get at | |
5431 | it later with lookup_attribute. */ | |
5432 | ; | |
5433 | else | |
5434 | { | |
5435 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5436 | *no_add_attrs = true; | |
5437 | } | |
5438 | ||
5439 | return NULL_TREE; | |
5440 | } | |
5441 | ||
d2af6a68 JJ |
5442 | /* Handle a "warning" or "error" attribute; arguments as in |
5443 | struct attribute_spec.handler. */ | |
5444 | ||
5445 | static tree | |
5446 | handle_error_attribute (tree *node, tree name, tree args, | |
5447 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
5448 | { | |
5449 | if (TREE_CODE (*node) == FUNCTION_DECL | |
5450 | || TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
5451 | /* Do nothing else, just set the attribute. We'll get at | |
5452 | it later with lookup_attribute. */ | |
5453 | ; | |
5454 | else | |
5455 | { | |
5456 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5457 | *no_add_attrs = true; | |
5458 | } | |
5459 | ||
5460 | return NULL_TREE; | |
5461 | } | |
0691d1d4 | 5462 | |
349ae713 NB |
5463 | /* Handle a "used" attribute; arguments as in |
5464 | struct attribute_spec.handler. */ | |
5465 | ||
5466 | static tree | |
e18476eb BI |
5467 | handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
5468 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 5469 | { |
d7ddbe24 RH |
5470 | tree node = *pnode; |
5471 | ||
5472 | if (TREE_CODE (node) == FUNCTION_DECL | |
5473 | || (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node))) | |
4d7d0451 | 5474 | { |
4d7d0451 | 5475 | TREE_USED (node) = 1; |
8e3e233b | 5476 | DECL_PRESERVE_P (node) = 1; |
4d7d0451 | 5477 | } |
349ae713 NB |
5478 | else |
5479 | { | |
5c498b10 | 5480 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5481 | *no_add_attrs = true; |
5482 | } | |
5483 | ||
5484 | return NULL_TREE; | |
5485 | } | |
5486 | ||
5487 | /* Handle a "unused" attribute; arguments as in | |
5488 | struct attribute_spec.handler. */ | |
5489 | ||
5490 | static tree | |
e18476eb BI |
5491 | handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5492 | int flags, bool *no_add_attrs) | |
349ae713 NB |
5493 | { |
5494 | if (DECL_P (*node)) | |
5495 | { | |
5496 | tree decl = *node; | |
5497 | ||
5498 | if (TREE_CODE (decl) == PARM_DECL | |
5499 | || TREE_CODE (decl) == VAR_DECL | |
5500 | || TREE_CODE (decl) == FUNCTION_DECL | |
5501 | || TREE_CODE (decl) == LABEL_DECL | |
5502 | || TREE_CODE (decl) == TYPE_DECL) | |
5503 | TREE_USED (decl) = 1; | |
5504 | else | |
5505 | { | |
5c498b10 | 5506 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5507 | *no_add_attrs = true; |
5508 | } | |
5509 | } | |
5510 | else | |
5511 | { | |
5512 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 5513 | *node = build_variant_type_copy (*node); |
349ae713 NB |
5514 | TREE_USED (*node) = 1; |
5515 | } | |
5516 | ||
5517 | return NULL_TREE; | |
5518 | } | |
5519 | ||
ce91e74c JH |
5520 | /* Handle a "externally_visible" attribute; arguments as in |
5521 | struct attribute_spec.handler. */ | |
5522 | ||
5523 | static tree | |
5524 | handle_externally_visible_attribute (tree *pnode, tree name, | |
5525 | tree ARG_UNUSED (args), | |
5526 | int ARG_UNUSED (flags), | |
5527 | bool *no_add_attrs) | |
5528 | { | |
5529 | tree node = *pnode; | |
5530 | ||
343d4b27 | 5531 | if (TREE_CODE (node) == FUNCTION_DECL || TREE_CODE (node) == VAR_DECL) |
ce91e74c | 5532 | { |
343d4b27 JJ |
5533 | if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
5534 | && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) | |
5535 | { | |
5536 | warning (OPT_Wattributes, | |
5537 | "%qE attribute have effect only on public objects", name); | |
5538 | *no_add_attrs = true; | |
5539 | } | |
ce91e74c | 5540 | } |
ce91e74c JH |
5541 | else |
5542 | { | |
5543 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
5544 | *no_add_attrs = true; | |
5545 | } | |
5546 | ||
5547 | return NULL_TREE; | |
5548 | } | |
5549 | ||
349ae713 NB |
5550 | /* Handle a "const" attribute; arguments as in |
5551 | struct attribute_spec.handler. */ | |
5552 | ||
5553 | static tree | |
e18476eb BI |
5554 | handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
5555 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5556 | { |
5557 | tree type = TREE_TYPE (*node); | |
5558 | ||
5559 | /* See FIXME comment on noreturn in c_common_attribute_table. */ | |
5560 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
5561 | TREE_READONLY (*node) = 1; | |
5562 | else if (TREE_CODE (type) == POINTER_TYPE | |
5563 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) | |
5564 | TREE_TYPE (*node) | |
5565 | = build_pointer_type | |
5566 | (build_type_variant (TREE_TYPE (type), 1, | |
5567 | TREE_THIS_VOLATILE (TREE_TYPE (type)))); | |
5568 | else | |
5569 | { | |
5c498b10 | 5570 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5571 | *no_add_attrs = true; |
5572 | } | |
5573 | ||
5574 | return NULL_TREE; | |
5575 | } | |
5576 | ||
5577 | /* Handle a "transparent_union" attribute; arguments as in | |
5578 | struct attribute_spec.handler. */ | |
5579 | ||
5580 | static tree | |
35b1a6fa | 5581 | handle_transparent_union_attribute (tree *node, tree name, |
e18476eb | 5582 | tree ARG_UNUSED (args), int flags, |
a742c759 | 5583 | bool *no_add_attrs) |
349ae713 | 5584 | { |
4009f2e7 | 5585 | tree type; |
52dd234b RH |
5586 | |
5587 | *no_add_attrs = true; | |
349ae713 | 5588 | |
4009f2e7 JM |
5589 | if (TREE_CODE (*node) == TYPE_DECL) |
5590 | node = &TREE_TYPE (*node); | |
5591 | type = *node; | |
349ae713 | 5592 | |
52dd234b | 5593 | if (TREE_CODE (type) == UNION_TYPE) |
349ae713 | 5594 | { |
52dd234b RH |
5595 | /* When IN_PLACE is set, leave the check for FIELDS and MODE to |
5596 | the code in finish_struct. */ | |
349ae713 | 5597 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
52dd234b RH |
5598 | { |
5599 | if (TYPE_FIELDS (type) == NULL_TREE | |
5600 | || TYPE_MODE (type) != DECL_MODE (TYPE_FIELDS (type))) | |
5601 | goto ignored; | |
5602 | ||
5603 | /* A type variant isn't good enough, since we don't a cast | |
5604 | to such a type removed as a no-op. */ | |
5605 | *node = type = build_duplicate_type (type); | |
5606 | } | |
5607 | ||
5608 | TYPE_TRANSPARENT_UNION (type) = 1; | |
5609 | return NULL_TREE; | |
349ae713 NB |
5610 | } |
5611 | ||
52dd234b RH |
5612 | ignored: |
5613 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
5614 | return NULL_TREE; |
5615 | } | |
5616 | ||
fc8600f9 MM |
5617 | /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
5618 | get the requested priority for a constructor or destructor, | |
5619 | possibly issuing diagnostics for invalid or reserved | |
5620 | priorities. */ | |
5621 | ||
5622 | static priority_type | |
5623 | get_priority (tree args, bool is_destructor) | |
5624 | { | |
5625 | HOST_WIDE_INT pri; | |
b2f4bed8 | 5626 | tree arg; |
fc8600f9 MM |
5627 | |
5628 | if (!args) | |
5629 | return DEFAULT_INIT_PRIORITY; | |
b2f4bed8 | 5630 | |
f6fc5c86 MM |
5631 | if (!SUPPORTS_INIT_PRIORITY) |
5632 | { | |
5633 | if (is_destructor) | |
5634 | error ("destructor priorities are not supported"); | |
5635 | else | |
5636 | error ("constructor priorities are not supported"); | |
5637 | return DEFAULT_INIT_PRIORITY; | |
5638 | } | |
5639 | ||
b2f4bed8 MM |
5640 | arg = TREE_VALUE (args); |
5641 | if (!host_integerp (arg, /*pos=*/0) | |
5642 | || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) | |
fc8600f9 MM |
5643 | goto invalid; |
5644 | ||
5645 | pri = tree_low_cst (TREE_VALUE (args), /*pos=*/0); | |
5646 | if (pri < 0 || pri > MAX_INIT_PRIORITY) | |
5647 | goto invalid; | |
5648 | ||
5649 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
5650 | { | |
5651 | if (is_destructor) | |
5652 | warning (0, | |
5653 | "destructor priorities from 0 to %d are reserved " | |
5654 | "for the implementation", | |
5655 | MAX_RESERVED_INIT_PRIORITY); | |
5656 | else | |
5657 | warning (0, | |
5658 | "constructor priorities from 0 to %d are reserved " | |
5659 | "for the implementation", | |
5660 | MAX_RESERVED_INIT_PRIORITY); | |
5661 | } | |
5662 | return pri; | |
5663 | ||
5664 | invalid: | |
5665 | if (is_destructor) | |
5666 | error ("destructor priorities must be integers from 0 to %d inclusive", | |
5667 | MAX_INIT_PRIORITY); | |
5668 | else | |
5669 | error ("constructor priorities must be integers from 0 to %d inclusive", | |
5670 | MAX_INIT_PRIORITY); | |
5671 | return DEFAULT_INIT_PRIORITY; | |
5672 | } | |
5673 | ||
349ae713 NB |
5674 | /* Handle a "constructor" attribute; arguments as in |
5675 | struct attribute_spec.handler. */ | |
5676 | ||
5677 | static tree | |
fc8600f9 | 5678 | handle_constructor_attribute (tree *node, tree name, tree args, |
e18476eb | 5679 | int ARG_UNUSED (flags), |
a742c759 | 5680 | bool *no_add_attrs) |
349ae713 NB |
5681 | { |
5682 | tree decl = *node; | |
5683 | tree type = TREE_TYPE (decl); | |
5684 | ||
5685 | if (TREE_CODE (decl) == FUNCTION_DECL | |
5686 | && TREE_CODE (type) == FUNCTION_TYPE | |
5687 | && decl_function_context (decl) == 0) | |
5688 | { | |
fc8600f9 | 5689 | priority_type priority; |
349ae713 | 5690 | DECL_STATIC_CONSTRUCTOR (decl) = 1; |
fc8600f9 MM |
5691 | priority = get_priority (args, /*is_destructor=*/false); |
5692 | SET_DECL_INIT_PRIORITY (decl, priority); | |
349ae713 NB |
5693 | TREE_USED (decl) = 1; |
5694 | } | |
5695 | else | |
5696 | { | |
5c498b10 | 5697 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5698 | *no_add_attrs = true; |
5699 | } | |
5700 | ||
5701 | return NULL_TREE; | |
5702 | } | |
5703 | ||
5704 | /* Handle a "destructor" attribute; arguments as in | |
5705 | struct attribute_spec.handler. */ | |
5706 | ||
5707 | static tree | |
fc8600f9 | 5708 | handle_destructor_attribute (tree *node, tree name, tree args, |
e18476eb | 5709 | int ARG_UNUSED (flags), |
a742c759 | 5710 | bool *no_add_attrs) |
349ae713 NB |
5711 | { |
5712 | tree decl = *node; | |
5713 | tree type = TREE_TYPE (decl); | |
5714 | ||
5715 | if (TREE_CODE (decl) == FUNCTION_DECL | |
5716 | && TREE_CODE (type) == FUNCTION_TYPE | |
5717 | && decl_function_context (decl) == 0) | |
5718 | { | |
fc8600f9 | 5719 | priority_type priority; |
349ae713 | 5720 | DECL_STATIC_DESTRUCTOR (decl) = 1; |
fc8600f9 MM |
5721 | priority = get_priority (args, /*is_destructor=*/true); |
5722 | SET_DECL_FINI_PRIORITY (decl, priority); | |
349ae713 NB |
5723 | TREE_USED (decl) = 1; |
5724 | } | |
5725 | else | |
5726 | { | |
5c498b10 | 5727 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5728 | *no_add_attrs = true; |
5729 | } | |
5730 | ||
5731 | return NULL_TREE; | |
5732 | } | |
5733 | ||
5734 | /* Handle a "mode" attribute; arguments as in | |
5735 | struct attribute_spec.handler. */ | |
5736 | ||
5737 | static tree | |
e18476eb BI |
5738 | handle_mode_attribute (tree *node, tree name, tree args, |
5739 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5740 | { |
5741 | tree type = *node; | |
5742 | ||
5743 | *no_add_attrs = true; | |
5744 | ||
5745 | if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE) | |
5c498b10 | 5746 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
5747 | else |
5748 | { | |
5749 | int j; | |
5750 | const char *p = IDENTIFIER_POINTER (TREE_VALUE (args)); | |
5751 | int len = strlen (p); | |
5752 | enum machine_mode mode = VOIDmode; | |
5753 | tree typefm; | |
6dd53648 | 5754 | bool valid_mode; |
349ae713 NB |
5755 | |
5756 | if (len > 4 && p[0] == '_' && p[1] == '_' | |
5757 | && p[len - 1] == '_' && p[len - 2] == '_') | |
5758 | { | |
28dab132 | 5759 | char *newp = (char *) alloca (len - 1); |
349ae713 NB |
5760 | |
5761 | strcpy (newp, &p[2]); | |
5762 | newp[len - 4] = '\0'; | |
5763 | p = newp; | |
5764 | } | |
5765 | ||
5766 | /* Change this type to have a type with the specified mode. | |
5767 | First check for the special modes. */ | |
3f75a254 | 5768 | if (!strcmp (p, "byte")) |
349ae713 NB |
5769 | mode = byte_mode; |
5770 | else if (!strcmp (p, "word")) | |
5771 | mode = word_mode; | |
3f75a254 | 5772 | else if (!strcmp (p, "pointer")) |
349ae713 | 5773 | mode = ptr_mode; |
c7ff6e7a AK |
5774 | else if (!strcmp (p, "libgcc_cmp_return")) |
5775 | mode = targetm.libgcc_cmp_return_mode (); | |
5776 | else if (!strcmp (p, "libgcc_shift_count")) | |
5777 | mode = targetm.libgcc_shift_count_mode (); | |
7b0518e3 UW |
5778 | else if (!strcmp (p, "unwind_word")) |
5779 | mode = targetm.unwind_word_mode (); | |
349ae713 NB |
5780 | else |
5781 | for (j = 0; j < NUM_MACHINE_MODES; j++) | |
5782 | if (!strcmp (p, GET_MODE_NAME (j))) | |
61f03aba RH |
5783 | { |
5784 | mode = (enum machine_mode) j; | |
5785 | break; | |
5786 | } | |
349ae713 NB |
5787 | |
5788 | if (mode == VOIDmode) | |
4a5eab38 | 5789 | { |
9e637a26 | 5790 | error ("unknown machine mode %qs", p); |
4a5eab38 PB |
5791 | return NULL_TREE; |
5792 | } | |
5793 | ||
6dd53648 RH |
5794 | valid_mode = false; |
5795 | switch (GET_MODE_CLASS (mode)) | |
4a5eab38 | 5796 | { |
6dd53648 RH |
5797 | case MODE_INT: |
5798 | case MODE_PARTIAL_INT: | |
5799 | case MODE_FLOAT: | |
9a8ce21f | 5800 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
5801 | case MODE_FRACT: |
5802 | case MODE_UFRACT: | |
5803 | case MODE_ACCUM: | |
5804 | case MODE_UACCUM: | |
6dd53648 RH |
5805 | valid_mode = targetm.scalar_mode_supported_p (mode); |
5806 | break; | |
5807 | ||
5808 | case MODE_COMPLEX_INT: | |
5809 | case MODE_COMPLEX_FLOAT: | |
5810 | valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); | |
5811 | break; | |
5812 | ||
5813 | case MODE_VECTOR_INT: | |
5814 | case MODE_VECTOR_FLOAT: | |
ab22c1fa CF |
5815 | case MODE_VECTOR_FRACT: |
5816 | case MODE_VECTOR_UFRACT: | |
5817 | case MODE_VECTOR_ACCUM: | |
5818 | case MODE_VECTOR_UACCUM: | |
5c498b10 DD |
5819 | warning (OPT_Wattributes, "specifying vector types with " |
5820 | "__attribute__ ((mode)) is deprecated"); | |
5821 | warning (OPT_Wattributes, | |
5822 | "use __attribute__ ((vector_size)) instead"); | |
6dd53648 RH |
5823 | valid_mode = vector_mode_valid_p (mode); |
5824 | break; | |
4a5eab38 | 5825 | |
6dd53648 RH |
5826 | default: |
5827 | break; | |
5828 | } | |
5829 | if (!valid_mode) | |
5830 | { | |
9e637a26 | 5831 | error ("unable to emulate %qs", p); |
6dd53648 RH |
5832 | return NULL_TREE; |
5833 | } | |
4a5eab38 | 5834 | |
6dd53648 | 5835 | if (POINTER_TYPE_P (type)) |
cb2a532e | 5836 | { |
6dd53648 RH |
5837 | tree (*fn)(tree, enum machine_mode, bool); |
5838 | ||
5839 | if (!targetm.valid_pointer_mode (mode)) | |
cb2a532e | 5840 | { |
9e637a26 | 5841 | error ("invalid pointer mode %qs", p); |
cb2a532e AH |
5842 | return NULL_TREE; |
5843 | } | |
5844 | ||
c22cacf3 | 5845 | if (TREE_CODE (type) == POINTER_TYPE) |
6dd53648 | 5846 | fn = build_pointer_type_for_mode; |
4977bab6 | 5847 | else |
6dd53648 RH |
5848 | fn = build_reference_type_for_mode; |
5849 | typefm = fn (TREE_TYPE (type), mode, false); | |
cb2a532e | 5850 | } |
6dd53648 | 5851 | else |
ab22c1fa CF |
5852 | { |
5853 | /* For fixed-point modes, we need to test if the signness of type | |
5854 | and the machine mode are consistent. */ | |
5855 | if (ALL_FIXED_POINT_MODE_P (mode) | |
5856 | && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
5857 | { | |
5858 | error ("signness of type and machine mode %qs don't match", p); | |
5859 | return NULL_TREE; | |
5860 | } | |
5861 | /* For fixed-point modes, we need to pass saturating info. */ | |
5862 | typefm = lang_hooks.types.type_for_mode (mode, | |
5863 | ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) | |
5864 | : TYPE_UNSIGNED (type)); | |
5865 | } | |
ec8465a5 | 5866 | |
6dd53648 RH |
5867 | if (typefm == NULL_TREE) |
5868 | { | |
61f03aba | 5869 | error ("no data type for mode %qs", p); |
6dd53648 RH |
5870 | return NULL_TREE; |
5871 | } | |
ec8465a5 RK |
5872 | else if (TREE_CODE (type) == ENUMERAL_TYPE) |
5873 | { | |
5874 | /* For enumeral types, copy the precision from the integer | |
5875 | type returned above. If not an INTEGER_TYPE, we can't use | |
5876 | this mode for this type. */ | |
5877 | if (TREE_CODE (typefm) != INTEGER_TYPE) | |
5878 | { | |
61f03aba | 5879 | error ("cannot use mode %qs for enumeral types", p); |
ec8465a5 RK |
5880 | return NULL_TREE; |
5881 | } | |
5882 | ||
99db1ef0 RH |
5883 | if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
5884 | { | |
5885 | TYPE_PRECISION (type) = TYPE_PRECISION (typefm); | |
5886 | typefm = type; | |
5887 | } | |
5888 | else | |
5889 | { | |
5890 | /* We cannot build a type variant, as there's code that assumes | |
5891 | that TYPE_MAIN_VARIANT has the same mode. This includes the | |
5892 | debug generators. Instead, create a subrange type. This | |
5893 | results in all of the enumeral values being emitted only once | |
5894 | in the original, and the subtype gets them by reference. */ | |
5895 | if (TYPE_UNSIGNED (type)) | |
5896 | typefm = make_unsigned_type (TYPE_PRECISION (typefm)); | |
5897 | else | |
5898 | typefm = make_signed_type (TYPE_PRECISION (typefm)); | |
5899 | TREE_TYPE (typefm) = type; | |
5900 | } | |
ec8465a5 | 5901 | } |
a2d36602 RH |
5902 | else if (VECTOR_MODE_P (mode) |
5903 | ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) | |
5904 | : TREE_CODE (type) != TREE_CODE (typefm)) | |
61f03aba RH |
5905 | { |
5906 | error ("mode %qs applied to inappropriate type", p); | |
5907 | return NULL_TREE; | |
5908 | } | |
5909 | ||
6dd53648 | 5910 | *node = typefm; |
349ae713 NB |
5911 | } |
5912 | ||
5913 | return NULL_TREE; | |
5914 | } | |
5915 | ||
5916 | /* Handle a "section" attribute; arguments as in | |
5917 | struct attribute_spec.handler. */ | |
5918 | ||
5919 | static tree | |
e18476eb BI |
5920 | handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
5921 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
5922 | { |
5923 | tree decl = *node; | |
5924 | ||
5925 | if (targetm.have_named_sections) | |
5926 | { | |
9fb32434 CT |
5927 | user_defined_section_attribute = true; |
5928 | ||
349ae713 NB |
5929 | if ((TREE_CODE (decl) == FUNCTION_DECL |
5930 | || TREE_CODE (decl) == VAR_DECL) | |
5931 | && TREE_CODE (TREE_VALUE (args)) == STRING_CST) | |
5932 | { | |
5933 | if (TREE_CODE (decl) == VAR_DECL | |
5934 | && current_function_decl != NULL_TREE | |
3f75a254 | 5935 | && !TREE_STATIC (decl)) |
349ae713 | 5936 | { |
ddd2d57e | 5937 | error ("%Jsection attribute cannot be specified for " |
6de9cd9a | 5938 | "local variables", decl); |
349ae713 NB |
5939 | *no_add_attrs = true; |
5940 | } | |
5941 | ||
5942 | /* The decl may have already been given a section attribute | |
5943 | from a previous declaration. Ensure they match. */ | |
5944 | else if (DECL_SECTION_NAME (decl) != NULL_TREE | |
5945 | && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)), | |
5946 | TREE_STRING_POINTER (TREE_VALUE (args))) != 0) | |
5947 | { | |
dee15844 JM |
5948 | error ("section of %q+D conflicts with previous declaration", |
5949 | *node); | |
349ae713 NB |
5950 | *no_add_attrs = true; |
5951 | } | |
feb60f03 NS |
5952 | else if (TREE_CODE (decl) == VAR_DECL |
5953 | && !targetm.have_tls && targetm.emutls.tmpl_section | |
5954 | && DECL_THREAD_LOCAL_P (decl)) | |
5955 | { | |
5956 | error ("section of %q+D cannot be overridden", *node); | |
5957 | *no_add_attrs = true; | |
5958 | } | |
349ae713 NB |
5959 | else |
5960 | DECL_SECTION_NAME (decl) = TREE_VALUE (args); | |
5961 | } | |
5962 | else | |
5963 | { | |
dee15844 | 5964 | error ("section attribute not allowed for %q+D", *node); |
349ae713 NB |
5965 | *no_add_attrs = true; |
5966 | } | |
5967 | } | |
5968 | else | |
5969 | { | |
ddd2d57e | 5970 | error ("%Jsection attributes are not supported for this target", *node); |
349ae713 NB |
5971 | *no_add_attrs = true; |
5972 | } | |
5973 | ||
5974 | return NULL_TREE; | |
5975 | } | |
5976 | ||
5977 | /* Handle a "aligned" attribute; arguments as in | |
5978 | struct attribute_spec.handler. */ | |
5979 | ||
5980 | static tree | |
e18476eb | 5981 | handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
a742c759 | 5982 | int flags, bool *no_add_attrs) |
349ae713 NB |
5983 | { |
5984 | tree decl = NULL_TREE; | |
5985 | tree *type = NULL; | |
5986 | int is_type = 0; | |
5987 | tree align_expr = (args ? TREE_VALUE (args) | |
5988 | : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
5989 | int i; | |
5990 | ||
5991 | if (DECL_P (*node)) | |
5992 | { | |
5993 | decl = *node; | |
5994 | type = &TREE_TYPE (decl); | |
5995 | is_type = TREE_CODE (*node) == TYPE_DECL; | |
5996 | } | |
5997 | else if (TYPE_P (*node)) | |
5998 | type = node, is_type = 1; | |
5999 | ||
349ae713 NB |
6000 | if (TREE_CODE (align_expr) != INTEGER_CST) |
6001 | { | |
6002 | error ("requested alignment is not a constant"); | |
6003 | *no_add_attrs = true; | |
6004 | } | |
6005 | else if ((i = tree_log2 (align_expr)) == -1) | |
6006 | { | |
6007 | error ("requested alignment is not a power of 2"); | |
6008 | *no_add_attrs = true; | |
6009 | } | |
6010 | else if (i > HOST_BITS_PER_INT - 2) | |
6011 | { | |
6012 | error ("requested alignment is too large"); | |
6013 | *no_add_attrs = true; | |
6014 | } | |
6015 | else if (is_type) | |
6016 | { | |
6017 | /* If we have a TYPE_DECL, then copy the type, so that we | |
6018 | don't accidentally modify a builtin type. See pushdecl. */ | |
6019 | if (decl && TREE_TYPE (decl) != error_mark_node | |
6020 | && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) | |
6021 | { | |
6022 | tree tt = TREE_TYPE (decl); | |
8dd16ecc | 6023 | *type = build_variant_type_copy (*type); |
349ae713 NB |
6024 | DECL_ORIGINAL_TYPE (decl) = tt; |
6025 | TYPE_NAME (*type) = decl; | |
6026 | TREE_USED (*type) = TREE_USED (decl); | |
6027 | TREE_TYPE (decl) = *type; | |
6028 | } | |
6029 | else if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 6030 | *type = build_variant_type_copy (*type); |
349ae713 NB |
6031 | |
6032 | TYPE_ALIGN (*type) = (1 << i) * BITS_PER_UNIT; | |
6033 | TYPE_USER_ALIGN (*type) = 1; | |
6034 | } | |
837edd5f | 6035 | else if (! VAR_OR_FUNCTION_DECL_P (decl) |
349ae713 NB |
6036 | && TREE_CODE (decl) != FIELD_DECL) |
6037 | { | |
dee15844 | 6038 | error ("alignment may not be specified for %q+D", decl); |
349ae713 NB |
6039 | *no_add_attrs = true; |
6040 | } | |
837edd5f GK |
6041 | else if (TREE_CODE (decl) == FUNCTION_DECL |
6042 | && DECL_ALIGN (decl) > (1 << i) * BITS_PER_UNIT) | |
6043 | { | |
6044 | if (DECL_USER_ALIGN (decl)) | |
6045 | error ("alignment for %q+D was previously specified as %d " | |
6046 | "and may not be decreased", decl, | |
6047 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
6048 | else | |
6049 | error ("alignment for %q+D must be at least %d", decl, | |
6050 | DECL_ALIGN (decl) / BITS_PER_UNIT); | |
6051 | *no_add_attrs = true; | |
6052 | } | |
349ae713 NB |
6053 | else |
6054 | { | |
6055 | DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT; | |
6056 | DECL_USER_ALIGN (decl) = 1; | |
6057 | } | |
6058 | ||
6059 | return NULL_TREE; | |
6060 | } | |
6061 | ||
6062 | /* Handle a "weak" attribute; arguments as in | |
6063 | struct attribute_spec.handler. */ | |
6064 | ||
6065 | static tree | |
55af93a8 | 6066 | handle_weak_attribute (tree *node, tree name, |
e18476eb BI |
6067 | tree ARG_UNUSED (args), |
6068 | int ARG_UNUSED (flags), | |
6069 | bool * ARG_UNUSED (no_add_attrs)) | |
349ae713 | 6070 | { |
55af93a8 | 6071 | if (TREE_CODE (*node) == FUNCTION_DECL |
6b4e94bc RG |
6072 | && DECL_DECLARED_INLINE_P (*node)) |
6073 | { | |
6074 | error ("inline function %q+D cannot be declared weak", *node); | |
6075 | *no_add_attrs = true; | |
6076 | } | |
6077 | else if (TREE_CODE (*node) == FUNCTION_DECL | |
6078 | || TREE_CODE (*node) == VAR_DECL) | |
55af93a8 DS |
6079 | declare_weak (*node); |
6080 | else | |
6081 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
349ae713 NB |
6082 | |
6083 | return NULL_TREE; | |
6084 | } | |
6085 | ||
6086 | /* Handle an "alias" attribute; arguments as in | |
6087 | struct attribute_spec.handler. */ | |
6088 | ||
6089 | static tree | |
35b1a6fa | 6090 | handle_alias_attribute (tree *node, tree name, tree args, |
e18476eb | 6091 | int ARG_UNUSED (flags), bool *no_add_attrs) |
349ae713 NB |
6092 | { |
6093 | tree decl = *node; | |
6094 | ||
6095 | if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) | |
a9b0b825 GK |
6096 | || (TREE_CODE (decl) != FUNCTION_DECL |
6097 | && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) | |
6098 | /* A static variable declaration is always a tentative definition, | |
6099 | but the alias is a non-tentative definition which overrides. */ | |
6100 | || (TREE_CODE (decl) != FUNCTION_DECL | |
6101 | && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) | |
349ae713 | 6102 | { |
dee15844 | 6103 | error ("%q+D defined both normally and as an alias", decl); |
349ae713 NB |
6104 | *no_add_attrs = true; |
6105 | } | |
f6a76b9f RH |
6106 | |
6107 | /* Note that the very first time we process a nested declaration, | |
6108 | decl_function_context will not be set. Indeed, *would* never | |
6109 | be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that | |
6110 | we do below. After such frobbery, pushdecl would set the context. | |
6111 | In any case, this is never what we want. */ | |
6112 | else if (decl_function_context (decl) == 0 && current_function_decl == NULL) | |
349ae713 NB |
6113 | { |
6114 | tree id; | |
6115 | ||
6116 | id = TREE_VALUE (args); | |
6117 | if (TREE_CODE (id) != STRING_CST) | |
6118 | { | |
40b97a2e | 6119 | error ("alias argument not a string"); |
349ae713 NB |
6120 | *no_add_attrs = true; |
6121 | return NULL_TREE; | |
6122 | } | |
6123 | id = get_identifier (TREE_STRING_POINTER (id)); | |
6124 | /* This counts as a use of the object pointed to. */ | |
6125 | TREE_USED (id) = 1; | |
6126 | ||
6127 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
6128 | DECL_INITIAL (decl) = error_mark_node; | |
6129 | else | |
6de9cd9a | 6130 | { |
a0203ca7 AO |
6131 | if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl))) |
6132 | DECL_EXTERNAL (decl) = 1; | |
6133 | else | |
6134 | DECL_EXTERNAL (decl) = 0; | |
6de9cd9a DN |
6135 | TREE_STATIC (decl) = 1; |
6136 | } | |
349ae713 NB |
6137 | } |
6138 | else | |
6139 | { | |
5c498b10 | 6140 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6141 | *no_add_attrs = true; |
6142 | } | |
6143 | ||
6144 | return NULL_TREE; | |
6145 | } | |
6146 | ||
a0203ca7 AO |
6147 | /* Handle a "weakref" attribute; arguments as in struct |
6148 | attribute_spec.handler. */ | |
6149 | ||
6150 | static tree | |
6151 | handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
6152 | int flags, bool *no_add_attrs) | |
6153 | { | |
6154 | tree attr = NULL_TREE; | |
6155 | ||
e1cf56b1 AO |
6156 | /* We must ignore the attribute when it is associated with |
6157 | local-scoped decls, since attribute alias is ignored and many | |
6158 | such symbols do not even have a DECL_WEAK field. */ | |
6159 | if (decl_function_context (*node) || current_function_decl) | |
6160 | { | |
6161 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
6162 | *no_add_attrs = true; | |
6163 | return NULL_TREE; | |
6164 | } | |
6165 | ||
a0203ca7 AO |
6166 | /* The idea here is that `weakref("name")' mutates into `weakref, |
6167 | alias("name")', and weakref without arguments, in turn, | |
6168 | implicitly adds weak. */ | |
6169 | ||
6170 | if (args) | |
6171 | { | |
6172 | attr = tree_cons (get_identifier ("alias"), args, attr); | |
6173 | attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); | |
6174 | ||
6175 | *no_add_attrs = true; | |
a9b0b825 GK |
6176 | |
6177 | decl_attributes (node, attr, flags); | |
a0203ca7 AO |
6178 | } |
6179 | else | |
6180 | { | |
6181 | if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) | |
6182 | error ("%Jweakref attribute must appear before alias attribute", | |
6183 | *node); | |
6184 | ||
a9b0b825 GK |
6185 | /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
6186 | and that isn't supported; and because it wants to add it to | |
6187 | the list of weak decls, which isn't helpful. */ | |
6188 | DECL_WEAK (*node) = 1; | |
a0203ca7 AO |
6189 | } |
6190 | ||
a0203ca7 AO |
6191 | return NULL_TREE; |
6192 | } | |
6193 | ||
349ae713 NB |
6194 | /* Handle an "visibility" attribute; arguments as in |
6195 | struct attribute_spec.handler. */ | |
6196 | ||
6197 | static tree | |
35b1a6fa | 6198 | handle_visibility_attribute (tree *node, tree name, tree args, |
e18476eb | 6199 | int ARG_UNUSED (flags), |
b9e75696 | 6200 | bool *ARG_UNUSED (no_add_attrs)) |
349ae713 NB |
6201 | { |
6202 | tree decl = *node; | |
968b41a1 | 6203 | tree id = TREE_VALUE (args); |
b9e75696 | 6204 | enum symbol_visibility vis; |
349ae713 | 6205 | |
d7afec4b ND |
6206 | if (TYPE_P (*node)) |
6207 | { | |
b9e75696 JM |
6208 | if (TREE_CODE (*node) == ENUMERAL_TYPE) |
6209 | /* OK */; | |
6210 | else if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE) | |
6211 | { | |
6212 | warning (OPT_Wattributes, "%qE attribute ignored on non-class types", | |
6213 | name); | |
6214 | return NULL_TREE; | |
6215 | } | |
6216 | else if (TYPE_FIELDS (*node)) | |
6217 | { | |
6218 | error ("%qE attribute ignored because %qT is already defined", | |
6219 | name, *node); | |
6220 | return NULL_TREE; | |
6221 | } | |
d7afec4b | 6222 | } |
3f75a254 | 6223 | else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
349ae713 | 6224 | { |
5c498b10 | 6225 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
968b41a1 | 6226 | return NULL_TREE; |
349ae713 | 6227 | } |
349ae713 | 6228 | |
968b41a1 MA |
6229 | if (TREE_CODE (id) != STRING_CST) |
6230 | { | |
40b97a2e | 6231 | error ("visibility argument not a string"); |
968b41a1 | 6232 | return NULL_TREE; |
349ae713 | 6233 | } |
9f63daea | 6234 | |
d7afec4b ND |
6235 | /* If this is a type, set the visibility on the type decl. */ |
6236 | if (TYPE_P (decl)) | |
6237 | { | |
6238 | decl = TYPE_NAME (decl); | |
3f75a254 | 6239 | if (!decl) |
c22cacf3 | 6240 | return NULL_TREE; |
e8233ac2 AP |
6241 | if (TREE_CODE (decl) == IDENTIFIER_NODE) |
6242 | { | |
5c498b10 | 6243 | warning (OPT_Wattributes, "%qE attribute ignored on types", |
e8233ac2 AP |
6244 | name); |
6245 | return NULL_TREE; | |
6246 | } | |
d7afec4b | 6247 | } |
349ae713 | 6248 | |
968b41a1 | 6249 | if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
b9e75696 | 6250 | vis = VISIBILITY_DEFAULT; |
968b41a1 | 6251 | else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
b9e75696 | 6252 | vis = VISIBILITY_INTERNAL; |
968b41a1 | 6253 | else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
b9e75696 | 6254 | vis = VISIBILITY_HIDDEN; |
968b41a1 | 6255 | else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
b9e75696 | 6256 | vis = VISIBILITY_PROTECTED; |
968b41a1 | 6257 | else |
b9e75696 JM |
6258 | { |
6259 | error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); | |
6260 | vis = VISIBILITY_DEFAULT; | |
6261 | } | |
6262 | ||
6263 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
3a687f8b MM |
6264 | && vis != DECL_VISIBILITY (decl)) |
6265 | { | |
6266 | tree attributes = (TYPE_P (*node) | |
6267 | ? TYPE_ATTRIBUTES (*node) | |
6268 | : DECL_ATTRIBUTES (decl)); | |
6269 | if (lookup_attribute ("visibility", attributes)) | |
6270 | error ("%qD redeclared with different visibility", decl); | |
6271 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6272 | && lookup_attribute ("dllimport", attributes)) | |
6273 | error ("%qD was declared %qs which implies default visibility", | |
6274 | decl, "dllimport"); | |
6275 | else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6276 | && lookup_attribute ("dllexport", attributes)) | |
6277 | error ("%qD was declared %qs which implies default visibility", | |
6278 | decl, "dllexport"); | |
6279 | } | |
b9e75696 JM |
6280 | |
6281 | DECL_VISIBILITY (decl) = vis; | |
d7afec4b ND |
6282 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
6283 | ||
b9e75696 JM |
6284 | /* Go ahead and attach the attribute to the node as well. This is needed |
6285 | so we can determine whether we have VISIBILITY_DEFAULT because the | |
6286 | visibility was not specified, or because it was explicitly overridden | |
6287 | from the containing scope. */ | |
968b41a1 | 6288 | |
349ae713 NB |
6289 | return NULL_TREE; |
6290 | } | |
6291 | ||
b2ca3702 MM |
6292 | /* Determine the ELF symbol visibility for DECL, which is either a |
6293 | variable or a function. It is an error to use this function if a | |
6294 | definition of DECL is not available in this translation unit. | |
6295 | Returns true if the final visibility has been determined by this | |
6296 | function; false if the caller is free to make additional | |
6297 | modifications. */ | |
6298 | ||
6299 | bool | |
6300 | c_determine_visibility (tree decl) | |
6301 | { | |
4094f4d2 NS |
6302 | gcc_assert (TREE_CODE (decl) == VAR_DECL |
6303 | || TREE_CODE (decl) == FUNCTION_DECL); | |
b2ca3702 MM |
6304 | |
6305 | /* If the user explicitly specified the visibility with an | |
6306 | attribute, honor that. DECL_VISIBILITY will have been set during | |
6307 | the processing of the attribute. We check for an explicit | |
6308 | attribute, rather than just checking DECL_VISIBILITY_SPECIFIED, | |
6309 | to distinguish the use of an attribute from the use of a "#pragma | |
6310 | GCC visibility push(...)"; in the latter case we still want other | |
6311 | considerations to be able to overrule the #pragma. */ | |
3a687f8b MM |
6312 | if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)) |
6313 | || (TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
6314 | && (lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl)) | |
6315 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl))))) | |
b2ca3702 MM |
6316 | return true; |
6317 | ||
b9e75696 JM |
6318 | /* Set default visibility to whatever the user supplied with |
6319 | visibility_specified depending on #pragma GCC visibility. */ | |
6320 | if (!DECL_VISIBILITY_SPECIFIED (decl)) | |
6321 | { | |
6322 | DECL_VISIBILITY (decl) = default_visibility; | |
6323 | DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma; | |
6324 | } | |
b2ca3702 MM |
6325 | return false; |
6326 | } | |
6327 | ||
dce81a1a JJ |
6328 | /* Handle an "tls_model" attribute; arguments as in |
6329 | struct attribute_spec.handler. */ | |
6330 | ||
6331 | static tree | |
35b1a6fa | 6332 | handle_tls_model_attribute (tree *node, tree name, tree args, |
e18476eb | 6333 | int ARG_UNUSED (flags), bool *no_add_attrs) |
dce81a1a | 6334 | { |
c2f7fa15 | 6335 | tree id; |
dce81a1a | 6336 | tree decl = *node; |
c2f7fa15 | 6337 | enum tls_model kind; |
dce81a1a | 6338 | |
c2f7fa15 SB |
6339 | *no_add_attrs = true; |
6340 | ||
6341 | if (!DECL_THREAD_LOCAL_P (decl)) | |
dce81a1a | 6342 | { |
5c498b10 | 6343 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
c2f7fa15 | 6344 | return NULL_TREE; |
dce81a1a | 6345 | } |
dce81a1a | 6346 | |
c2f7fa15 SB |
6347 | kind = DECL_TLS_MODEL (decl); |
6348 | id = TREE_VALUE (args); | |
6349 | if (TREE_CODE (id) != STRING_CST) | |
6350 | { | |
6351 | error ("tls_model argument not a string"); | |
6352 | return NULL_TREE; | |
dce81a1a JJ |
6353 | } |
6354 | ||
c2f7fa15 SB |
6355 | if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
6356 | kind = TLS_MODEL_LOCAL_EXEC; | |
6357 | else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) | |
6358 | kind = TLS_MODEL_INITIAL_EXEC; | |
6359 | else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) | |
6360 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
6361 | else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) | |
6362 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
6363 | else | |
6364 | error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); | |
6365 | ||
6366 | DECL_TLS_MODEL (decl) = kind; | |
dce81a1a JJ |
6367 | return NULL_TREE; |
6368 | } | |
6369 | ||
349ae713 NB |
6370 | /* Handle a "no_instrument_function" attribute; arguments as in |
6371 | struct attribute_spec.handler. */ | |
6372 | ||
6373 | static tree | |
35b1a6fa | 6374 | handle_no_instrument_function_attribute (tree *node, tree name, |
e18476eb BI |
6375 | tree ARG_UNUSED (args), |
6376 | int ARG_UNUSED (flags), | |
a742c759 | 6377 | bool *no_add_attrs) |
349ae713 NB |
6378 | { |
6379 | tree decl = *node; | |
6380 | ||
6381 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
6382 | { | |
bda67431 | 6383 | error ("%J%qE attribute applies only to functions", decl, name); |
349ae713 NB |
6384 | *no_add_attrs = true; |
6385 | } | |
6386 | else if (DECL_INITIAL (decl)) | |
6387 | { | |
bda67431 | 6388 | error ("%Jcan%'t set %qE attribute after definition", decl, name); |
349ae713 NB |
6389 | *no_add_attrs = true; |
6390 | } | |
6391 | else | |
6392 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; | |
6393 | ||
6394 | return NULL_TREE; | |
6395 | } | |
6396 | ||
6397 | /* Handle a "malloc" attribute; arguments as in | |
6398 | struct attribute_spec.handler. */ | |
6399 | ||
6400 | static tree | |
e18476eb BI |
6401 | handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6402 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 | 6403 | { |
3425638a JM |
6404 | if (TREE_CODE (*node) == FUNCTION_DECL |
6405 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) | |
349ae713 | 6406 | DECL_IS_MALLOC (*node) = 1; |
349ae713 NB |
6407 | else |
6408 | { | |
5c498b10 | 6409 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6410 | *no_add_attrs = true; |
6411 | } | |
6412 | ||
6413 | return NULL_TREE; | |
6414 | } | |
6415 | ||
51bc54a6 DM |
6416 | /* Handle a "alloc_size" attribute; arguments as in |
6417 | struct attribute_spec.handler. */ | |
6418 | ||
6419 | static tree | |
6420 | handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, | |
6421 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6422 | { | |
f3f75f69 | 6423 | unsigned arg_count = type_num_arguments (*node); |
51bc54a6 DM |
6424 | for (; args; args = TREE_CHAIN (args)) |
6425 | { | |
6426 | tree position = TREE_VALUE (args); | |
6427 | ||
6428 | if (TREE_CODE (position) != INTEGER_CST | |
6429 | || TREE_INT_CST_HIGH (position) | |
6430 | || TREE_INT_CST_LOW (position) < 1 | |
6431 | || TREE_INT_CST_LOW (position) > arg_count ) | |
6432 | { | |
6433 | warning (OPT_Wattributes, | |
6434 | "alloc_size parameter outside range"); | |
6435 | *no_add_attrs = true; | |
6436 | return NULL_TREE; | |
6437 | } | |
6438 | } | |
6439 | return NULL_TREE; | |
6440 | } | |
6441 | ||
6e9a3221 AN |
6442 | /* Handle a "returns_twice" attribute; arguments as in |
6443 | struct attribute_spec.handler. */ | |
6444 | ||
6445 | static tree | |
6446 | handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), | |
6447 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
6448 | { | |
6449 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6450 | DECL_IS_RETURNS_TWICE (*node) = 1; | |
6451 | else | |
6452 | { | |
5c498b10 | 6453 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
6e9a3221 AN |
6454 | *no_add_attrs = true; |
6455 | } | |
6456 | ||
6457 | return NULL_TREE; | |
6458 | } | |
6459 | ||
349ae713 NB |
6460 | /* Handle a "no_limit_stack" attribute; arguments as in |
6461 | struct attribute_spec.handler. */ | |
6462 | ||
6463 | static tree | |
35b1a6fa | 6464 | handle_no_limit_stack_attribute (tree *node, tree name, |
e18476eb BI |
6465 | tree ARG_UNUSED (args), |
6466 | int ARG_UNUSED (flags), | |
a742c759 | 6467 | bool *no_add_attrs) |
349ae713 NB |
6468 | { |
6469 | tree decl = *node; | |
6470 | ||
6471 | if (TREE_CODE (decl) != FUNCTION_DECL) | |
6472 | { | |
bda67431 | 6473 | error ("%J%qE attribute applies only to functions", decl, name); |
349ae713 NB |
6474 | *no_add_attrs = true; |
6475 | } | |
6476 | else if (DECL_INITIAL (decl)) | |
6477 | { | |
bda67431 | 6478 | error ("%Jcan%'t set %qE attribute after definition", decl, name); |
349ae713 NB |
6479 | *no_add_attrs = true; |
6480 | } | |
6481 | else | |
6482 | DECL_NO_LIMIT_STACK (decl) = 1; | |
6483 | ||
6484 | return NULL_TREE; | |
6485 | } | |
6486 | ||
6487 | /* Handle a "pure" attribute; arguments as in | |
6488 | struct attribute_spec.handler. */ | |
6489 | ||
6490 | static tree | |
e18476eb BI |
6491 | handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6492 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
349ae713 NB |
6493 | { |
6494 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
becfd6e5 | 6495 | DECL_PURE_P (*node) = 1; |
349ae713 NB |
6496 | /* ??? TODO: Support types. */ |
6497 | else | |
6498 | { | |
5c498b10 | 6499 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6500 | *no_add_attrs = true; |
6501 | } | |
6502 | ||
6503 | return NULL_TREE; | |
6504 | } | |
6505 | ||
dcd6de6d ZD |
6506 | /* Handle a "no vops" attribute; arguments as in |
6507 | struct attribute_spec.handler. */ | |
6508 | ||
6509 | static tree | |
6510 | handle_novops_attribute (tree *node, tree ARG_UNUSED (name), | |
6511 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
6512 | bool *ARG_UNUSED (no_add_attrs)) | |
6513 | { | |
6514 | gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); | |
6515 | DECL_IS_NOVOPS (*node) = 1; | |
6516 | return NULL_TREE; | |
6517 | } | |
6518 | ||
349ae713 NB |
6519 | /* Handle a "deprecated" attribute; arguments as in |
6520 | struct attribute_spec.handler. */ | |
35b1a6fa | 6521 | |
349ae713 | 6522 | static tree |
35b1a6fa | 6523 | handle_deprecated_attribute (tree *node, tree name, |
e18476eb | 6524 | tree ARG_UNUSED (args), int flags, |
a742c759 | 6525 | bool *no_add_attrs) |
349ae713 NB |
6526 | { |
6527 | tree type = NULL_TREE; | |
6528 | int warn = 0; | |
c51a1ba9 | 6529 | tree what = NULL_TREE; |
35b1a6fa | 6530 | |
349ae713 NB |
6531 | if (DECL_P (*node)) |
6532 | { | |
6533 | tree decl = *node; | |
6534 | type = TREE_TYPE (decl); | |
35b1a6fa | 6535 | |
349ae713 NB |
6536 | if (TREE_CODE (decl) == TYPE_DECL |
6537 | || TREE_CODE (decl) == PARM_DECL | |
6538 | || TREE_CODE (decl) == VAR_DECL | |
6539 | || TREE_CODE (decl) == FUNCTION_DECL | |
6540 | || TREE_CODE (decl) == FIELD_DECL) | |
6541 | TREE_DEPRECATED (decl) = 1; | |
6542 | else | |
6543 | warn = 1; | |
6544 | } | |
6545 | else if (TYPE_P (*node)) | |
6546 | { | |
6547 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) | |
8dd16ecc | 6548 | *node = build_variant_type_copy (*node); |
349ae713 NB |
6549 | TREE_DEPRECATED (*node) = 1; |
6550 | type = *node; | |
6551 | } | |
6552 | else | |
6553 | warn = 1; | |
35b1a6fa | 6554 | |
349ae713 NB |
6555 | if (warn) |
6556 | { | |
6557 | *no_add_attrs = true; | |
6558 | if (type && TYPE_NAME (type)) | |
6559 | { | |
6560 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
c51a1ba9 | 6561 | what = TYPE_NAME (*node); |
349ae713 NB |
6562 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
6563 | && DECL_NAME (TYPE_NAME (type))) | |
c51a1ba9 | 6564 | what = DECL_NAME (TYPE_NAME (type)); |
349ae713 NB |
6565 | } |
6566 | if (what) | |
5c498b10 | 6567 | warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
349ae713 | 6568 | else |
5c498b10 | 6569 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6570 | } |
6571 | ||
6572 | return NULL_TREE; | |
6573 | } | |
6574 | ||
349ae713 NB |
6575 | /* Handle a "vector_size" attribute; arguments as in |
6576 | struct attribute_spec.handler. */ | |
6577 | ||
6578 | static tree | |
35b1a6fa | 6579 | handle_vector_size_attribute (tree *node, tree name, tree args, |
e18476eb | 6580 | int ARG_UNUSED (flags), |
a742c759 | 6581 | bool *no_add_attrs) |
349ae713 NB |
6582 | { |
6583 | unsigned HOST_WIDE_INT vecsize, nunits; | |
26277d41 | 6584 | enum machine_mode orig_mode; |
4a5eab38 | 6585 | tree type = *node, new_type, size; |
349ae713 NB |
6586 | |
6587 | *no_add_attrs = true; | |
6588 | ||
4a5eab38 | 6589 | size = TREE_VALUE (args); |
4a5eab38 | 6590 | |
3f75a254 | 6591 | if (!host_integerp (size, 1)) |
349ae713 | 6592 | { |
5c498b10 | 6593 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
349ae713 NB |
6594 | return NULL_TREE; |
6595 | } | |
6596 | ||
6597 | /* Get the vector size (in bytes). */ | |
4a5eab38 | 6598 | vecsize = tree_low_cst (size, 1); |
349ae713 NB |
6599 | |
6600 | /* We need to provide for vector pointers, vector arrays, and | |
6601 | functions returning vectors. For example: | |
6602 | ||
6603 | __attribute__((vector_size(16))) short *foo; | |
6604 | ||
6605 | In this case, the mode is SI, but the type being modified is | |
6606 | HI, so we need to look further. */ | |
6607 | ||
6608 | while (POINTER_TYPE_P (type) | |
6609 | || TREE_CODE (type) == FUNCTION_TYPE | |
43dc123f | 6610 | || TREE_CODE (type) == METHOD_TYPE |
270e749d JJ |
6611 | || TREE_CODE (type) == ARRAY_TYPE |
6612 | || TREE_CODE (type) == OFFSET_TYPE) | |
349ae713 NB |
6613 | type = TREE_TYPE (type); |
6614 | ||
6615 | /* Get the mode of the type being modified. */ | |
6616 | orig_mode = TYPE_MODE (type); | |
6617 | ||
270e749d JJ |
6618 | if ((!INTEGRAL_TYPE_P (type) |
6619 | && !SCALAR_FLOAT_TYPE_P (type) | |
6620 | && !FIXED_POINT_TYPE_P (type)) | |
3d8bf70f | 6621 | || (!SCALAR_FLOAT_MODE_P (orig_mode) |
ab22c1fa CF |
6622 | && GET_MODE_CLASS (orig_mode) != MODE_INT |
6623 | && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) | |
3f75a254 | 6624 | || !host_integerp (TYPE_SIZE_UNIT (type), 1)) |
349ae713 | 6625 | { |
c51a1ba9 | 6626 | error ("invalid vector type for attribute %qE", name); |
349ae713 NB |
6627 | return NULL_TREE; |
6628 | } | |
6629 | ||
ee8960e5 JJ |
6630 | if (vecsize % tree_low_cst (TYPE_SIZE_UNIT (type), 1)) |
6631 | { | |
6632 | error ("vector size not an integral multiple of component size"); | |
6633 | return NULL; | |
6634 | } | |
6635 | ||
6636 | if (vecsize == 0) | |
6637 | { | |
6638 | error ("zero vector size"); | |
6639 | return NULL; | |
6640 | } | |
6641 | ||
349ae713 NB |
6642 | /* Calculate how many units fit in the vector. */ |
6643 | nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
26277d41 | 6644 | if (nunits & (nunits - 1)) |
349ae713 | 6645 | { |
26277d41 | 6646 | error ("number of components of the vector not a power of two"); |
349ae713 NB |
6647 | return NULL_TREE; |
6648 | } | |
6649 | ||
26277d41 | 6650 | new_type = build_vector_type (type, nunits); |
349ae713 NB |
6651 | |
6652 | /* Build back pointers if needed. */ | |
5dc11954 | 6653 | *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
349ae713 NB |
6654 | |
6655 | return NULL_TREE; | |
6656 | } | |
6657 | ||
b34c7881 JT |
6658 | /* Handle the "nonnull" attribute. */ |
6659 | static tree | |
e18476eb BI |
6660 | handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
6661 | tree args, int ARG_UNUSED (flags), | |
a742c759 | 6662 | bool *no_add_attrs) |
b34c7881 JT |
6663 | { |
6664 | tree type = *node; | |
6665 | unsigned HOST_WIDE_INT attr_arg_num; | |
6666 | ||
6667 | /* If no arguments are specified, all pointer arguments should be | |
95bd1dd7 | 6668 | non-null. Verify a full prototype is given so that the arguments |
b34c7881 | 6669 | will have the correct types when we actually check them later. */ |
3f75a254 | 6670 | if (!args) |
b34c7881 | 6671 | { |
3f75a254 | 6672 | if (!TYPE_ARG_TYPES (type)) |
b34c7881 JT |
6673 | { |
6674 | error ("nonnull attribute without arguments on a non-prototype"); | |
6de9cd9a | 6675 | *no_add_attrs = true; |
b34c7881 JT |
6676 | } |
6677 | return NULL_TREE; | |
6678 | } | |
6679 | ||
6680 | /* Argument list specified. Verify that each argument number references | |
6681 | a pointer argument. */ | |
6682 | for (attr_arg_num = 1; args; args = TREE_CHAIN (args)) | |
6683 | { | |
6684 | tree argument; | |
6de9cd9a | 6685 | unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
b34c7881 | 6686 | |
3f75a254 | 6687 | if (!get_nonnull_operand (TREE_VALUE (args), &arg_num)) |
b34c7881 | 6688 | { |
40b97a2e | 6689 | error ("nonnull argument has invalid operand number (argument %lu)", |
b34c7881 JT |
6690 | (unsigned long) attr_arg_num); |
6691 | *no_add_attrs = true; | |
6692 | return NULL_TREE; | |
6693 | } | |
6694 | ||
6695 | argument = TYPE_ARG_TYPES (type); | |
6696 | if (argument) | |
6697 | { | |
6698 | for (ck_num = 1; ; ck_num++) | |
6699 | { | |
3f75a254 | 6700 | if (!argument || ck_num == arg_num) |
b34c7881 JT |
6701 | break; |
6702 | argument = TREE_CHAIN (argument); | |
6703 | } | |
6704 | ||
3f75a254 | 6705 | if (!argument |
b34c7881 JT |
6706 | || TREE_CODE (TREE_VALUE (argument)) == VOID_TYPE) |
6707 | { | |
40b97a2e | 6708 | error ("nonnull argument with out-of-range operand number (argument %lu, operand %lu)", |
b34c7881 JT |
6709 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
6710 | *no_add_attrs = true; | |
6711 | return NULL_TREE; | |
6712 | } | |
6713 | ||
6de9cd9a | 6714 | if (TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE) |
b34c7881 | 6715 | { |
40b97a2e | 6716 | error ("nonnull argument references non-pointer operand (argument %lu, operand %lu)", |
b34c7881 JT |
6717 | (unsigned long) attr_arg_num, (unsigned long) arg_num); |
6718 | *no_add_attrs = true; | |
6719 | return NULL_TREE; | |
6720 | } | |
6721 | } | |
6722 | } | |
6723 | ||
6724 | return NULL_TREE; | |
6725 | } | |
6726 | ||
6727 | /* Check the argument list of a function call for null in argument slots | |
94a0dd7b SL |
6728 | that are marked as requiring a non-null pointer argument. The NARGS |
6729 | arguments are passed in the array ARGARRAY. | |
6730 | */ | |
b34c7881 JT |
6731 | |
6732 | static void | |
94a0dd7b | 6733 | check_function_nonnull (tree attrs, int nargs, tree *argarray) |
b34c7881 | 6734 | { |
94a0dd7b SL |
6735 | tree a, args; |
6736 | int i; | |
b34c7881 JT |
6737 | |
6738 | for (a = attrs; a; a = TREE_CHAIN (a)) | |
6739 | { | |
6740 | if (is_attribute_p ("nonnull", TREE_PURPOSE (a))) | |
6741 | { | |
6de9cd9a | 6742 | args = TREE_VALUE (a); |
b34c7881 | 6743 | |
6de9cd9a DN |
6744 | /* Walk the argument list. If we encounter an argument number we |
6745 | should check for non-null, do it. If the attribute has no args, | |
6746 | then every pointer argument is checked (in which case the check | |
b34c7881 | 6747 | for pointer type is done in check_nonnull_arg). */ |
94a0dd7b | 6748 | for (i = 0; i < nargs; i++) |
6de9cd9a | 6749 | { |
94a0dd7b | 6750 | if (!args || nonnull_check_p (args, i + 1)) |
dfd0a3de | 6751 | check_function_arguments_recurse (check_nonnull_arg, NULL, |
94a0dd7b SL |
6752 | argarray[i], |
6753 | i + 1); | |
6de9cd9a | 6754 | } |
b34c7881 JT |
6755 | } |
6756 | } | |
6757 | } | |
6758 | ||
254986c7 | 6759 | /* Check that the Nth argument of a function call (counting backwards |
94a0dd7b SL |
6760 | from the end) is a (pointer)0. The NARGS arguments are passed in the |
6761 | array ARGARRAY. */ | |
3d091dac KG |
6762 | |
6763 | static void | |
94a0dd7b | 6764 | check_function_sentinel (tree attrs, int nargs, tree *argarray, tree typelist) |
3d091dac KG |
6765 | { |
6766 | tree attr = lookup_attribute ("sentinel", attrs); | |
6767 | ||
6768 | if (attr) | |
6769 | { | |
94a0dd7b SL |
6770 | int len = 0; |
6771 | int pos = 0; | |
6772 | tree sentinel; | |
c22cacf3 | 6773 | |
94a0dd7b SL |
6774 | /* Skip over the named arguments. */ |
6775 | while (typelist && len < nargs) | |
c22cacf3 | 6776 | { |
94a0dd7b SL |
6777 | typelist = TREE_CHAIN (typelist); |
6778 | len++; | |
6779 | } | |
254986c7 | 6780 | |
94a0dd7b SL |
6781 | if (TREE_VALUE (attr)) |
6782 | { | |
6783 | tree p = TREE_VALUE (TREE_VALUE (attr)); | |
6784 | pos = TREE_INT_CST_LOW (p); | |
6785 | } | |
254986c7 | 6786 | |
94a0dd7b SL |
6787 | /* The sentinel must be one of the varargs, i.e. |
6788 | in position >= the number of fixed arguments. */ | |
6789 | if ((nargs - 1 - pos) < len) | |
6790 | { | |
6791 | warning (OPT_Wformat, | |
6792 | "not enough variable arguments to fit a sentinel"); | |
6793 | return; | |
3d091dac | 6794 | } |
94a0dd7b SL |
6795 | |
6796 | /* Validate the sentinel. */ | |
6797 | sentinel = argarray[nargs - 1 - pos]; | |
6798 | if ((!POINTER_TYPE_P (TREE_TYPE (sentinel)) | |
6799 | || !integer_zerop (sentinel)) | |
6800 | /* Although __null (in C++) is only an integer we allow it | |
6801 | nevertheless, as we are guaranteed that it's exactly | |
6802 | as wide as a pointer, and we don't want to force | |
6803 | users to cast the NULL they have written there. | |
6804 | We warn with -Wstrict-null-sentinel, though. */ | |
6805 | && (warn_strict_null_sentinel || null_node != sentinel)) | |
6806 | warning (OPT_Wformat, "missing sentinel in function call"); | |
3d091dac KG |
6807 | } |
6808 | } | |
6809 | ||
b34c7881 JT |
6810 | /* Helper for check_function_nonnull; given a list of operands which |
6811 | must be non-null in ARGS, determine if operand PARAM_NUM should be | |
6812 | checked. */ | |
6813 | ||
6814 | static bool | |
35b1a6fa | 6815 | nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num) |
b34c7881 | 6816 | { |
6de9cd9a | 6817 | unsigned HOST_WIDE_INT arg_num = 0; |
b34c7881 JT |
6818 | |
6819 | for (; args; args = TREE_CHAIN (args)) | |
6820 | { | |
366de0ce NS |
6821 | bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num); |
6822 | ||
6823 | gcc_assert (found); | |
b34c7881 JT |
6824 | |
6825 | if (arg_num == param_num) | |
6826 | return true; | |
6827 | } | |
6828 | return false; | |
6829 | } | |
6830 | ||
6831 | /* Check that the function argument PARAM (which is operand number | |
6832 | PARAM_NUM) is non-null. This is called by check_function_nonnull | |
6833 | via check_function_arguments_recurse. */ | |
6834 | ||
6835 | static void | |
e18476eb | 6836 | check_nonnull_arg (void * ARG_UNUSED (ctx), tree param, |
35b1a6fa | 6837 | unsigned HOST_WIDE_INT param_num) |
b34c7881 JT |
6838 | { |
6839 | /* Just skip checking the argument if it's not a pointer. This can | |
6840 | happen if the "nonnull" attribute was given without an operand | |
6841 | list (which means to check every pointer argument). */ | |
6842 | ||
6843 | if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE) | |
6844 | return; | |
6845 | ||
6846 | if (integer_zerop (param)) | |
30480ec4 DD |
6847 | warning (OPT_Wnonnull, "null argument where non-null required " |
6848 | "(argument %lu)", (unsigned long) param_num); | |
b34c7881 JT |
6849 | } |
6850 | ||
6851 | /* Helper for nonnull attribute handling; fetch the operand number | |
6852 | from the attribute argument list. */ | |
6853 | ||
6854 | static bool | |
35b1a6fa | 6855 | get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp) |
b34c7881 | 6856 | { |
f6d1c3a6 | 6857 | /* Verify the arg number is a constant. */ |
b34c7881 JT |
6858 | if (TREE_CODE (arg_num_expr) != INTEGER_CST |
6859 | || TREE_INT_CST_HIGH (arg_num_expr) != 0) | |
6860 | return false; | |
6861 | ||
6862 | *valp = TREE_INT_CST_LOW (arg_num_expr); | |
6863 | return true; | |
6864 | } | |
39f2f3c8 RS |
6865 | |
6866 | /* Handle a "nothrow" attribute; arguments as in | |
6867 | struct attribute_spec.handler. */ | |
6868 | ||
6869 | static tree | |
e18476eb BI |
6870 | handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
6871 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
39f2f3c8 RS |
6872 | { |
6873 | if (TREE_CODE (*node) == FUNCTION_DECL) | |
6874 | TREE_NOTHROW (*node) = 1; | |
6875 | /* ??? TODO: Support types. */ | |
6876 | else | |
6877 | { | |
5c498b10 | 6878 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
39f2f3c8 RS |
6879 | *no_add_attrs = true; |
6880 | } | |
6881 | ||
6882 | return NULL_TREE; | |
6883 | } | |
0bfa5f65 RH |
6884 | |
6885 | /* Handle a "cleanup" attribute; arguments as in | |
6886 | struct attribute_spec.handler. */ | |
6887 | ||
6888 | static tree | |
35b1a6fa | 6889 | handle_cleanup_attribute (tree *node, tree name, tree args, |
e18476eb | 6890 | int ARG_UNUSED (flags), bool *no_add_attrs) |
0bfa5f65 RH |
6891 | { |
6892 | tree decl = *node; | |
6893 | tree cleanup_id, cleanup_decl; | |
6894 | ||
6895 | /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do | |
6896 | for global destructors in C++. This requires infrastructure that | |
6897 | we don't have generically at the moment. It's also not a feature | |
6898 | we'd be missing too much, since we do have attribute constructor. */ | |
6899 | if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)) | |
6900 | { | |
5c498b10 | 6901 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
0bfa5f65 RH |
6902 | *no_add_attrs = true; |
6903 | return NULL_TREE; | |
6904 | } | |
6905 | ||
6906 | /* Verify that the argument is a function in scope. */ | |
6907 | /* ??? We could support pointers to functions here as well, if | |
6908 | that was considered desirable. */ | |
6909 | cleanup_id = TREE_VALUE (args); | |
6910 | if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) | |
6911 | { | |
40b97a2e | 6912 | error ("cleanup argument not an identifier"); |
0bfa5f65 RH |
6913 | *no_add_attrs = true; |
6914 | return NULL_TREE; | |
6915 | } | |
10e6657a | 6916 | cleanup_decl = lookup_name (cleanup_id); |
0bfa5f65 RH |
6917 | if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
6918 | { | |
40b97a2e | 6919 | error ("cleanup argument not a function"); |
0bfa5f65 RH |
6920 | *no_add_attrs = true; |
6921 | return NULL_TREE; | |
6922 | } | |
6923 | ||
35b1a6fa | 6924 | /* That the function has proper type is checked with the |
0bfa5f65 RH |
6925 | eventual call to build_function_call. */ |
6926 | ||
6927 | return NULL_TREE; | |
6928 | } | |
72954a4f JM |
6929 | |
6930 | /* Handle a "warn_unused_result" attribute. No special handling. */ | |
6931 | ||
6932 | static tree | |
6933 | handle_warn_unused_result_attribute (tree *node, tree name, | |
e18476eb BI |
6934 | tree ARG_UNUSED (args), |
6935 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
72954a4f JM |
6936 | { |
6937 | /* Ignore the attribute for functions not returning any value. */ | |
6938 | if (VOID_TYPE_P (TREE_TYPE (*node))) | |
6939 | { | |
5c498b10 | 6940 | warning (OPT_Wattributes, "%qE attribute ignored", name); |
72954a4f JM |
6941 | *no_add_attrs = true; |
6942 | } | |
6943 | ||
6944 | return NULL_TREE; | |
6945 | } | |
3d091dac KG |
6946 | |
6947 | /* Handle a "sentinel" attribute. */ | |
6948 | ||
6949 | static tree | |
254986c7 | 6950 | handle_sentinel_attribute (tree *node, tree name, tree args, |
3d091dac KG |
6951 | int ARG_UNUSED (flags), bool *no_add_attrs) |
6952 | { | |
6953 | tree params = TYPE_ARG_TYPES (*node); | |
6954 | ||
6955 | if (!params) | |
6956 | { | |
5c498b10 DD |
6957 | warning (OPT_Wattributes, |
6958 | "%qE attribute requires prototypes with named arguments", name); | |
3d091dac | 6959 | *no_add_attrs = true; |
3d091dac | 6960 | } |
254986c7 KG |
6961 | else |
6962 | { | |
6963 | while (TREE_CHAIN (params)) | |
6964 | params = TREE_CHAIN (params); | |
3d091dac | 6965 | |
254986c7 | 6966 | if (VOID_TYPE_P (TREE_VALUE (params))) |
c22cacf3 | 6967 | { |
5c498b10 DD |
6968 | warning (OPT_Wattributes, |
6969 | "%qE attribute only applies to variadic functions", name); | |
254986c7 KG |
6970 | *no_add_attrs = true; |
6971 | } | |
6972 | } | |
c22cacf3 | 6973 | |
254986c7 | 6974 | if (args) |
3d091dac | 6975 | { |
254986c7 KG |
6976 | tree position = TREE_VALUE (args); |
6977 | ||
254986c7 | 6978 | if (TREE_CODE (position) != INTEGER_CST) |
c22cacf3 | 6979 | { |
aa86a51b DM |
6980 | warning (OPT_Wattributes, |
6981 | "requested position is not an integer constant"); | |
254986c7 KG |
6982 | *no_add_attrs = true; |
6983 | } | |
6984 | else | |
c22cacf3 | 6985 | { |
254986c7 KG |
6986 | if (tree_int_cst_lt (position, integer_zero_node)) |
6987 | { | |
aa86a51b DM |
6988 | warning (OPT_Wattributes, |
6989 | "requested position is less than zero"); | |
254986c7 KG |
6990 | *no_add_attrs = true; |
6991 | } | |
6992 | } | |
3d091dac | 6993 | } |
c22cacf3 | 6994 | |
3d091dac KG |
6995 | return NULL_TREE; |
6996 | } | |
b5d32c25 KG |
6997 | |
6998 | /* Handle a "type_generic" attribute. */ | |
6999 | ||
7000 | static tree | |
7001 | handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), | |
7002 | tree ARG_UNUSED (args), int ARG_UNUSED (flags), | |
7003 | bool * ARG_UNUSED (no_add_attrs)) | |
7004 | { | |
3bf5906b KG |
7005 | tree params; |
7006 | ||
7007 | /* Ensure we have a function type. */ | |
7008 | gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); | |
7009 | ||
7010 | params = TYPE_ARG_TYPES (*node); | |
7011 | while (params && ! VOID_TYPE_P (TREE_VALUE (params))) | |
7012 | params = TREE_CHAIN (params); | |
7013 | ||
7014 | /* Ensure we have a variadic function. */ | |
7015 | gcc_assert (!params); | |
b5d32c25 KG |
7016 | |
7017 | return NULL_TREE; | |
7018 | } | |
ab442df7 MM |
7019 | |
7020 | /* For handling "option" attribute. arguments as in | |
7021 | struct attribute_spec.handler. */ | |
7022 | ||
7023 | static tree | |
7024 | handle_option_attribute (tree *node, tree name, tree args, int flags, | |
7025 | bool *no_add_attrs) | |
7026 | { | |
7027 | /* Ensure we have a function type. */ | |
7028 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7029 | { | |
7030 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7031 | *no_add_attrs = true; | |
7032 | } | |
7033 | else if (targetm.target_option.valid_attribute_p | |
7034 | == default_target_option_valid_attribute_p) | |
7035 | { | |
7036 | warning (OPT_Wattributes, | |
7037 | "%qE attribute is not supported on this machine", | |
7038 | name); | |
7039 | *no_add_attrs = true; | |
7040 | } | |
7041 | else if (! targetm.target_option.valid_attribute_p (*node, name, args, | |
7042 | flags)) | |
7043 | *no_add_attrs = true; | |
7044 | ||
7045 | return NULL_TREE; | |
7046 | } | |
7047 | ||
7048 | /* Arguments being collected for optimization. */ | |
7049 | typedef const char *const_char_p; /* For DEF_VEC_P. */ | |
7050 | DEF_VEC_P(const_char_p); | |
7051 | DEF_VEC_ALLOC_P(const_char_p, gc); | |
7052 | static GTY(()) VEC(const_char_p, gc) *optimize_args; | |
7053 | ||
7054 | ||
7055 | /* Inner function to convert a TREE_LIST to argv string to parse the optimize | |
7056 | options in ARGS. ATTR_P is true if this is for attribute(optimize), and | |
7057 | false for #pragma GCC optimize. */ | |
7058 | ||
7059 | bool | |
7060 | parse_optimize_options (tree args, bool attr_p) | |
7061 | { | |
7062 | bool ret = true; | |
7063 | unsigned opt_argc; | |
7064 | unsigned i; | |
7065 | const char **opt_argv; | |
7066 | tree ap; | |
7067 | ||
7068 | /* Build up argv vector. Just in case the string is stored away, use garbage | |
7069 | collected strings. */ | |
7070 | VEC_truncate (const_char_p, optimize_args, 0); | |
7071 | VEC_safe_push (const_char_p, gc, optimize_args, NULL); | |
7072 | ||
7073 | for (ap = args; ap != NULL_TREE; ap = TREE_CHAIN (ap)) | |
7074 | { | |
7075 | tree value = TREE_VALUE (ap); | |
7076 | ||
7077 | if (TREE_CODE (value) == INTEGER_CST) | |
7078 | { | |
7079 | char buffer[20]; | |
7080 | sprintf (buffer, "-O%ld", (long) TREE_INT_CST_LOW (value)); | |
7081 | VEC_safe_push (const_char_p, gc, optimize_args, ggc_strdup (buffer)); | |
7082 | } | |
7083 | ||
7084 | else if (TREE_CODE (value) == STRING_CST) | |
7085 | { | |
7086 | /* Split string into multiple substrings. */ | |
7087 | size_t len = TREE_STRING_LENGTH (value); | |
7088 | char *p = ASTRDUP (TREE_STRING_POINTER (value)); | |
7089 | char *end = p + len; | |
7090 | char *comma; | |
7091 | char *next_p = p; | |
7092 | ||
7093 | while (next_p != NULL) | |
7094 | { | |
7095 | size_t len2; | |
7096 | char *q, *r; | |
7097 | ||
7098 | p = next_p; | |
7099 | comma = strchr (p, ','); | |
7100 | if (comma) | |
7101 | { | |
7102 | len2 = comma - p; | |
7103 | *comma = '\0'; | |
7104 | next_p = comma+1; | |
7105 | } | |
7106 | else | |
7107 | { | |
7108 | len2 = end - p; | |
7109 | next_p = NULL; | |
7110 | } | |
7111 | ||
7112 | r = q = (char *) ggc_alloc (len2 + 3); | |
7113 | ||
7114 | /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx | |
7115 | options. */ | |
7116 | if (*p == '-' && p[1] != 'O' && p[1] != 'f') | |
7117 | { | |
7118 | ret = false; | |
7119 | if (attr_p) | |
7120 | warning (OPT_Wattributes, | |
7121 | "Bad option %s to optimize attribute.", p); | |
7122 | else | |
7123 | warning (OPT_Wpragmas, | |
7124 | "Bad option %s to pragma attribute", p); | |
7125 | continue; | |
7126 | } | |
7127 | ||
7128 | if (*p != '-') | |
7129 | { | |
7130 | *r++ = '-'; | |
7131 | ||
7132 | /* Assume that Ox is -Ox, a numeric value is -Ox, a s by | |
7133 | itself is -Os, and any other switch begins with a -f. */ | |
7134 | if ((*p >= '0' && *p <= '9') | |
7135 | || (p[0] == 's' && p[1] == '\0')) | |
7136 | *r++ = 'O'; | |
7137 | else if (*p != 'O') | |
7138 | *r++ = 'f'; | |
7139 | } | |
7140 | ||
7141 | memcpy (r, p, len2); | |
7142 | r[len2] = '\0'; | |
7143 | VEC_safe_push (const_char_p, gc, optimize_args, q); | |
7144 | } | |
7145 | ||
7146 | } | |
7147 | } | |
7148 | ||
7149 | opt_argc = VEC_length (const_char_p, optimize_args); | |
7150 | opt_argv = (const char **) alloca (sizeof (char *) * (opt_argc + 1)); | |
7151 | ||
7152 | for (i = 1; i < opt_argc; i++) | |
7153 | opt_argv[i] = VEC_index (const_char_p, optimize_args, i); | |
7154 | ||
7155 | /* Now parse the options. */ | |
7156 | decode_options (opt_argc, opt_argv); | |
7157 | ||
7158 | VEC_truncate (const_char_p, optimize_args, 0); | |
7159 | return ret; | |
7160 | } | |
7161 | ||
7162 | /* For handling "optimize" attribute. arguments as in | |
7163 | struct attribute_spec.handler. */ | |
7164 | ||
7165 | static tree | |
7166 | handle_optimize_attribute (tree *node, tree name, tree args, | |
7167 | int ARG_UNUSED (flags), bool *no_add_attrs) | |
7168 | { | |
7169 | /* Ensure we have a function type. */ | |
7170 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
7171 | { | |
7172 | warning (OPT_Wattributes, "%qE attribute ignored", name); | |
7173 | *no_add_attrs = true; | |
7174 | } | |
7175 | else | |
7176 | { | |
7177 | struct cl_optimization cur_opts; | |
7178 | tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); | |
7179 | ||
7180 | /* Save current options. */ | |
7181 | cl_optimization_save (&cur_opts); | |
7182 | ||
7183 | /* If we previously had some optimization options, use them as the | |
7184 | default. */ | |
7185 | if (old_opts) | |
7186 | cl_optimization_restore (TREE_OPTIMIZATION (old_opts)); | |
7187 | ||
7188 | /* Parse options, and update the vector. */ | |
7189 | parse_optimize_options (args, true); | |
7190 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) | |
7191 | = build_optimization_node (); | |
7192 | ||
7193 | /* Restore current options. */ | |
7194 | cl_optimization_restore (&cur_opts); | |
7195 | } | |
7196 | ||
7197 | return NULL_TREE; | |
7198 | } | |
b34c7881 | 7199 | \f |
94a0dd7b SL |
7200 | /* Check for valid arguments being passed to a function. |
7201 | ATTRS is a list of attributes. There are NARGS arguments in the array | |
7202 | ARGARRAY. TYPELIST is the list of argument types for the function. | |
7203 | */ | |
b34c7881 | 7204 | void |
94a0dd7b | 7205 | check_function_arguments (tree attrs, int nargs, tree *argarray, tree typelist) |
b34c7881 JT |
7206 | { |
7207 | /* Check for null being passed in a pointer argument that must be | |
7208 | non-null. We also need to do this if format checking is enabled. */ | |
7209 | ||
7210 | if (warn_nonnull) | |
94a0dd7b | 7211 | check_function_nonnull (attrs, nargs, argarray); |
b34c7881 JT |
7212 | |
7213 | /* Check for errors in format strings. */ | |
7214 | ||
7876a414 | 7215 | if (warn_format || warn_missing_format_attribute) |
94a0dd7b | 7216 | check_function_format (attrs, nargs, argarray); |
7876a414 KG |
7217 | |
7218 | if (warn_format) | |
94a0dd7b | 7219 | check_function_sentinel (attrs, nargs, argarray, typelist); |
b34c7881 JT |
7220 | } |
7221 | ||
7222 | /* Generic argument checking recursion routine. PARAM is the argument to | |
7223 | be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked | |
7224 | once the argument is resolved. CTX is context for the callback. */ | |
7225 | void | |
35b1a6fa AJ |
7226 | check_function_arguments_recurse (void (*callback) |
7227 | (void *, tree, unsigned HOST_WIDE_INT), | |
7228 | void *ctx, tree param, | |
7229 | unsigned HOST_WIDE_INT param_num) | |
b34c7881 | 7230 | { |
1043771b | 7231 | if (CONVERT_EXPR_P (param) |
1344f9a3 JM |
7232 | && (TYPE_PRECISION (TREE_TYPE (param)) |
7233 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (param, 0))))) | |
b34c7881 JT |
7234 | { |
7235 | /* Strip coercion. */ | |
7236 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 7237 | TREE_OPERAND (param, 0), param_num); |
b34c7881 JT |
7238 | return; |
7239 | } | |
7240 | ||
7241 | if (TREE_CODE (param) == CALL_EXPR) | |
7242 | { | |
5039610b | 7243 | tree type = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (param))); |
b34c7881 JT |
7244 | tree attrs; |
7245 | bool found_format_arg = false; | |
7246 | ||
7247 | /* See if this is a call to a known internationalization function | |
7248 | that modifies a format arg. Such a function may have multiple | |
7249 | format_arg attributes (for example, ngettext). */ | |
7250 | ||
7251 | for (attrs = TYPE_ATTRIBUTES (type); | |
7252 | attrs; | |
7253 | attrs = TREE_CHAIN (attrs)) | |
7254 | if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs))) | |
7255 | { | |
5039610b | 7256 | tree inner_arg; |
b34c7881 JT |
7257 | tree format_num_expr; |
7258 | int format_num; | |
7259 | int i; | |
5039610b | 7260 | call_expr_arg_iterator iter; |
b34c7881 JT |
7261 | |
7262 | /* Extract the argument number, which was previously checked | |
7263 | to be valid. */ | |
7264 | format_num_expr = TREE_VALUE (TREE_VALUE (attrs)); | |
b34c7881 | 7265 | |
366de0ce NS |
7266 | gcc_assert (TREE_CODE (format_num_expr) == INTEGER_CST |
7267 | && !TREE_INT_CST_HIGH (format_num_expr)); | |
b34c7881 JT |
7268 | |
7269 | format_num = TREE_INT_CST_LOW (format_num_expr); | |
7270 | ||
5039610b SL |
7271 | for (inner_arg = first_call_expr_arg (param, &iter), i = 1; |
7272 | inner_arg != 0; | |
7273 | inner_arg = next_call_expr_arg (&iter), i++) | |
b34c7881 JT |
7274 | if (i == format_num) |
7275 | { | |
7276 | check_function_arguments_recurse (callback, ctx, | |
5039610b | 7277 | inner_arg, param_num); |
b34c7881 JT |
7278 | found_format_arg = true; |
7279 | break; | |
7280 | } | |
7281 | } | |
7282 | ||
7283 | /* If we found a format_arg attribute and did a recursive check, | |
7284 | we are done with checking this argument. Otherwise, we continue | |
7285 | and this will be considered a non-literal. */ | |
7286 | if (found_format_arg) | |
7287 | return; | |
7288 | } | |
7289 | ||
7290 | if (TREE_CODE (param) == COND_EXPR) | |
7291 | { | |
7292 | /* Check both halves of the conditional expression. */ | |
7293 | check_function_arguments_recurse (callback, ctx, | |
6de9cd9a | 7294 | TREE_OPERAND (param, 1), param_num); |
b34c7881 | 7295 | check_function_arguments_recurse (callback, ctx, |
6de9cd9a | 7296 | TREE_OPERAND (param, 2), param_num); |
b34c7881 JT |
7297 | return; |
7298 | } | |
7299 | ||
7300 | (*callback) (ctx, param, param_num); | |
7301 | } | |
e2500fed | 7302 | |
83322951 RG |
7303 | /* Checks the number of arguments NARGS against the required number |
7304 | REQUIRED and issues an error if there is a mismatch. Returns true | |
7305 | if the number of arguments is correct, otherwise false. */ | |
7306 | ||
7307 | static bool | |
7308 | validate_nargs (tree fndecl, int nargs, int required) | |
7309 | { | |
7310 | if (nargs < required) | |
7311 | { | |
7312 | error ("not enough arguments to function %qE", fndecl); | |
7313 | return false; | |
7314 | } | |
7315 | else if (nargs > required) | |
7316 | { | |
7317 | error ("too many arguments to function %qE", fndecl); | |
7318 | return false; | |
7319 | } | |
7320 | return true; | |
7321 | } | |
7322 | ||
7323 | /* Verifies the NARGS arguments ARGS to the builtin function FNDECL. | |
7324 | Returns false if there was an error, otherwise true. */ | |
7325 | ||
7326 | bool | |
7327 | check_builtin_function_arguments (tree fndecl, int nargs, tree *args) | |
7328 | { | |
7329 | if (!DECL_BUILT_IN (fndecl) | |
7330 | || DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL) | |
7331 | return true; | |
7332 | ||
7333 | switch (DECL_FUNCTION_CODE (fndecl)) | |
7334 | { | |
7335 | case BUILT_IN_CONSTANT_P: | |
7336 | return validate_nargs (fndecl, nargs, 1); | |
7337 | ||
7338 | case BUILT_IN_ISFINITE: | |
7339 | case BUILT_IN_ISINF: | |
05f41289 | 7340 | case BUILT_IN_ISINF_SIGN: |
83322951 RG |
7341 | case BUILT_IN_ISNAN: |
7342 | case BUILT_IN_ISNORMAL: | |
7343 | if (validate_nargs (fndecl, nargs, 1)) | |
7344 | { | |
7345 | if (TREE_CODE (TREE_TYPE (args[0])) != REAL_TYPE) | |
7346 | { | |
7347 | error ("non-floating-point argument in call to " | |
7348 | "function %qE", fndecl); | |
7349 | return false; | |
7350 | } | |
7351 | return true; | |
7352 | } | |
7353 | return false; | |
7354 | ||
7355 | case BUILT_IN_ISGREATER: | |
7356 | case BUILT_IN_ISGREATEREQUAL: | |
7357 | case BUILT_IN_ISLESS: | |
7358 | case BUILT_IN_ISLESSEQUAL: | |
7359 | case BUILT_IN_ISLESSGREATER: | |
7360 | case BUILT_IN_ISUNORDERED: | |
7361 | if (validate_nargs (fndecl, nargs, 2)) | |
7362 | { | |
7363 | enum tree_code code0, code1; | |
7364 | code0 = TREE_CODE (TREE_TYPE (args[0])); | |
7365 | code1 = TREE_CODE (TREE_TYPE (args[1])); | |
7366 | if (!((code0 == REAL_TYPE && code1 == REAL_TYPE) | |
7367 | || (code0 == REAL_TYPE && code1 == INTEGER_TYPE) | |
7368 | || (code0 == INTEGER_TYPE && code1 == REAL_TYPE))) | |
7369 | { | |
7370 | error ("non-floating-point arguments in call to " | |
7371 | "function %qE", fndecl); | |
7372 | return false; | |
7373 | } | |
7374 | return true; | |
7375 | } | |
7376 | return false; | |
7377 | ||
3bf5906b KG |
7378 | case BUILT_IN_FPCLASSIFY: |
7379 | if (validate_nargs (fndecl, nargs, 6)) | |
7380 | { | |
7381 | unsigned i; | |
7382 | ||
7383 | for (i=0; i<5; i++) | |
7384 | if (TREE_CODE (args[i]) != INTEGER_CST) | |
7385 | { | |
7386 | error ("non-const integer argument %u in call to function %qE", | |
7387 | i+1, fndecl); | |
7388 | return false; | |
7389 | } | |
7390 | ||
7391 | if (TREE_CODE (TREE_TYPE (args[5])) != REAL_TYPE) | |
7392 | { | |
7393 | error ("non-floating-point argument in call to function %qE", | |
7394 | fndecl); | |
7395 | return false; | |
7396 | } | |
7397 | return true; | |
7398 | } | |
7399 | return false; | |
7400 | ||
83322951 RG |
7401 | default: |
7402 | return true; | |
7403 | } | |
7404 | } | |
7405 | ||
d07605f5 AP |
7406 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
7407 | ||
7408 | int | |
7409 | field_decl_cmp (const void *x_p, const void *y_p) | |
7410 | { | |
28dab132 BI |
7411 | const tree *const x = (const tree *const) x_p; |
7412 | const tree *const y = (const tree *const) y_p; | |
7413 | ||
d07605f5 AP |
7414 | if (DECL_NAME (*x) == DECL_NAME (*y)) |
7415 | /* A nontype is "greater" than a type. */ | |
7416 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
7417 | if (DECL_NAME (*x) == NULL_TREE) | |
7418 | return -1; | |
7419 | if (DECL_NAME (*y) == NULL_TREE) | |
7420 | return 1; | |
7421 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
7422 | return -1; | |
7423 | return 1; | |
7424 | } | |
7425 | ||
7426 | static struct { | |
7427 | gt_pointer_operator new_value; | |
7428 | void *cookie; | |
7429 | } resort_data; | |
7430 | ||
7431 | /* This routine compares two fields like field_decl_cmp but using the | |
7432 | pointer operator in resort_data. */ | |
7433 | ||
7434 | static int | |
7435 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
7436 | { | |
28dab132 BI |
7437 | const tree *const x = (const tree *const) x_p; |
7438 | const tree *const y = (const tree *const) y_p; | |
d07605f5 AP |
7439 | |
7440 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
7441 | /* A nontype is "greater" than a type. */ | |
7442 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
7443 | if (DECL_NAME (*x) == NULL_TREE) | |
7444 | return -1; | |
7445 | if (DECL_NAME (*y) == NULL_TREE) | |
7446 | return 1; | |
7447 | { | |
7448 | tree d1 = DECL_NAME (*x); | |
7449 | tree d2 = DECL_NAME (*y); | |
7450 | resort_data.new_value (&d1, resort_data.cookie); | |
7451 | resort_data.new_value (&d2, resort_data.cookie); | |
7452 | if (d1 < d2) | |
7453 | return -1; | |
7454 | } | |
7455 | return 1; | |
7456 | } | |
7457 | ||
7458 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
7459 | ||
7460 | void | |
7461 | resort_sorted_fields (void *obj, | |
e18476eb | 7462 | void * ARG_UNUSED (orig_obj), |
6de9cd9a DN |
7463 | gt_pointer_operator new_value, |
7464 | void *cookie) | |
d07605f5 | 7465 | { |
e18476eb | 7466 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; |
d07605f5 AP |
7467 | resort_data.new_value = new_value; |
7468 | resort_data.cookie = cookie; | |
7469 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
6de9cd9a | 7470 | resort_field_decl_cmp); |
d07605f5 AP |
7471 | } |
7472 | ||
0a3ee0fd GDR |
7473 | /* Subroutine of c_parse_error. |
7474 | Return the result of concatenating LHS and RHS. RHS is really | |
7475 | a string literal, its first character is indicated by RHS_START and | |
3292fb42 | 7476 | RHS_SIZE is its length (including the terminating NUL character). |
0a3ee0fd GDR |
7477 | |
7478 | The caller is responsible for deleting the returned pointer. */ | |
7479 | ||
7480 | static char * | |
7481 | catenate_strings (const char *lhs, const char *rhs_start, int rhs_size) | |
7482 | { | |
7483 | const int lhs_size = strlen (lhs); | |
7484 | char *result = XNEWVEC (char, lhs_size + rhs_size); | |
7485 | strncpy (result, lhs, lhs_size); | |
7486 | strncpy (result + lhs_size, rhs_start, rhs_size); | |
7487 | return result; | |
7488 | } | |
7489 | ||
4b794eaf | 7490 | /* Issue the error given by GMSGID, indicating that it occurred before |
4bb8ca28 MM |
7491 | TOKEN, which had the associated VALUE. */ |
7492 | ||
7493 | void | |
4b794eaf | 7494 | c_parse_error (const char *gmsgid, enum cpp_ttype token, tree value) |
4bb8ca28 | 7495 | { |
0a3ee0fd GDR |
7496 | #define catenate_messages(M1, M2) catenate_strings ((M1), (M2), sizeof (M2)) |
7497 | ||
7498 | char *message = NULL; | |
4bb8ca28 MM |
7499 | |
7500 | if (token == CPP_EOF) | |
4b794eaf | 7501 | message = catenate_messages (gmsgid, " at end of input"); |
b6baa67d KVH |
7502 | else if (token == CPP_CHAR || token == CPP_WCHAR || token == CPP_CHAR16 |
7503 | || token == CPP_CHAR32) | |
4bb8ca28 MM |
7504 | { |
7505 | unsigned int val = TREE_INT_CST_LOW (value); | |
b6baa67d KVH |
7506 | const char *prefix; |
7507 | ||
7508 | switch (token) | |
7509 | { | |
7510 | default: | |
7511 | prefix = ""; | |
7512 | break; | |
7513 | case CPP_WCHAR: | |
7514 | prefix = "L"; | |
7515 | break; | |
7516 | case CPP_CHAR16: | |
7517 | prefix = "u"; | |
7518 | break; | |
7519 | case CPP_CHAR32: | |
7520 | prefix = "U"; | |
7521 | break; | |
7522 | } | |
7523 | ||
4bb8ca28 | 7524 | if (val <= UCHAR_MAX && ISGRAPH (val)) |
c22cacf3 | 7525 | message = catenate_messages (gmsgid, " before %s'%c'"); |
4bb8ca28 | 7526 | else |
c22cacf3 | 7527 | message = catenate_messages (gmsgid, " before %s'\\x%x'"); |
0a3ee0fd | 7528 | |
b6baa67d | 7529 | error (message, prefix, val); |
0a3ee0fd GDR |
7530 | free (message); |
7531 | message = NULL; | |
4bb8ca28 | 7532 | } |
b6baa67d KVH |
7533 | else if (token == CPP_STRING || token == CPP_WSTRING || token == CPP_STRING16 |
7534 | || token == CPP_STRING32) | |
4b794eaf | 7535 | message = catenate_messages (gmsgid, " before string constant"); |
4bb8ca28 | 7536 | else if (token == CPP_NUMBER) |
4b794eaf | 7537 | message = catenate_messages (gmsgid, " before numeric constant"); |
4bb8ca28 | 7538 | else if (token == CPP_NAME) |
0a3ee0fd | 7539 | { |
4b794eaf | 7540 | message = catenate_messages (gmsgid, " before %qE"); |
c51a1ba9 | 7541 | error (message, value); |
0a3ee0fd GDR |
7542 | free (message); |
7543 | message = NULL; | |
7544 | } | |
bc4071dd RH |
7545 | else if (token == CPP_PRAGMA) |
7546 | message = catenate_messages (gmsgid, " before %<#pragma%>"); | |
7547 | else if (token == CPP_PRAGMA_EOL) | |
7548 | message = catenate_messages (gmsgid, " before end of line"); | |
4bb8ca28 | 7549 | else if (token < N_TTYPES) |
0a3ee0fd | 7550 | { |
4b794eaf | 7551 | message = catenate_messages (gmsgid, " before %qs token"); |
0a3ee0fd GDR |
7552 | error (message, cpp_type2name (token)); |
7553 | free (message); | |
7554 | message = NULL; | |
7555 | } | |
4bb8ca28 | 7556 | else |
4b794eaf | 7557 | error (gmsgid); |
0a3ee0fd GDR |
7558 | |
7559 | if (message) | |
7560 | { | |
7561 | error (message); | |
7562 | free (message); | |
7563 | } | |
c22cacf3 | 7564 | #undef catenate_messages |
4bb8ca28 MM |
7565 | } |
7566 | ||
6de9cd9a DN |
7567 | /* Walk a gimplified function and warn for functions whose return value is |
7568 | ignored and attribute((warn_unused_result)) is set. This is done before | |
9f63daea EC |
7569 | inlining, so we don't have to worry about that. */ |
7570 | ||
6de9cd9a | 7571 | void |
726a989a | 7572 | c_warn_unused_result (gimple_seq seq) |
6de9cd9a | 7573 | { |
6de9cd9a | 7574 | tree fdecl, ftype; |
726a989a | 7575 | gimple_stmt_iterator i; |
6de9cd9a | 7576 | |
726a989a | 7577 | for (i = gsi_start (seq); !gsi_end_p (i); gsi_next (&i)) |
6de9cd9a | 7578 | { |
726a989a | 7579 | gimple g = gsi_stmt (i); |
6de9cd9a | 7580 | |
726a989a | 7581 | switch (gimple_code (g)) |
6de9cd9a | 7582 | { |
726a989a RB |
7583 | case GIMPLE_BIND: |
7584 | c_warn_unused_result (gimple_bind_body (g)); | |
7585 | break; | |
7586 | case GIMPLE_TRY: | |
7587 | c_warn_unused_result (gimple_try_eval (g)); | |
7588 | c_warn_unused_result (gimple_try_cleanup (g)); | |
7589 | break; | |
7590 | case GIMPLE_CATCH: | |
7591 | c_warn_unused_result (gimple_catch_handler (g)); | |
7592 | break; | |
7593 | case GIMPLE_EH_FILTER: | |
7594 | c_warn_unused_result (gimple_eh_filter_failure (g)); | |
7595 | break; | |
6de9cd9a | 7596 | |
726a989a RB |
7597 | case GIMPLE_CALL: |
7598 | if (gimple_call_lhs (g)) | |
7599 | break; | |
7600 | ||
7601 | /* This is a naked call, as opposed to a GIMPLE_CALL with an | |
7602 | LHS. All calls whose value is ignored should be | |
7603 | represented like this. Look for the attribute. */ | |
7c9577be RG |
7604 | fdecl = gimple_call_fndecl (g); |
7605 | ftype = TREE_TYPE (TREE_TYPE (gimple_call_fn (g))); | |
6de9cd9a | 7606 | |
726a989a RB |
7607 | if (lookup_attribute ("warn_unused_result", TYPE_ATTRIBUTES (ftype))) |
7608 | { | |
7609 | location_t loc = gimple_location (g); | |
7610 | ||
7611 | if (fdecl) | |
7612 | warning (0, "%Hignoring return value of %qD, " | |
7613 | "declared with attribute warn_unused_result", | |
7614 | &loc, fdecl); | |
7615 | else | |
7616 | warning (0, "%Hignoring return value of function " | |
7617 | "declared with attribute warn_unused_result", | |
7618 | &loc); | |
7619 | } | |
7620 | break; | |
7621 | ||
7622 | default: | |
7623 | /* Not a container, not a call, or a call whose value is used. */ | |
7624 | break; | |
7625 | } | |
6de9cd9a DN |
7626 | } |
7627 | } | |
7628 | ||
c5ff069d ZW |
7629 | /* Convert a character from the host to the target execution character |
7630 | set. cpplib handles this, mostly. */ | |
7631 | ||
7632 | HOST_WIDE_INT | |
7633 | c_common_to_target_charset (HOST_WIDE_INT c) | |
7634 | { | |
7635 | /* Character constants in GCC proper are sign-extended under -fsigned-char, | |
7636 | zero-extended under -fno-signed-char. cpplib insists that characters | |
7637 | and character constants are always unsigned. Hence we must convert | |
7638 | back and forth. */ | |
7639 | cppchar_t uc = ((cppchar_t)c) & ((((cppchar_t)1) << CHAR_BIT)-1); | |
7640 | ||
7641 | uc = cpp_host_to_exec_charset (parse_in, uc); | |
7642 | ||
7643 | if (flag_signed_char) | |
7644 | return ((HOST_WIDE_INT)uc) << (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE) | |
7645 | >> (HOST_BITS_PER_WIDE_INT - CHAR_TYPE_SIZE); | |
7646 | else | |
7647 | return uc; | |
7648 | } | |
7649 | ||
ee8a6a3e | 7650 | /* Build the result of __builtin_offsetof. EXPR is a nested sequence of |
6d4d7b0e PB |
7651 | component references, with STOP_REF, or alternatively an INDIRECT_REF of |
7652 | NULL, at the bottom; much like the traditional rendering of offsetof as a | |
7653 | macro. Returns the folded and properly cast result. */ | |
ee8a6a3e RH |
7654 | |
7655 | static tree | |
6d4d7b0e | 7656 | fold_offsetof_1 (tree expr, tree stop_ref) |
ee8a6a3e RH |
7657 | { |
7658 | enum tree_code code = PLUS_EXPR; | |
7659 | tree base, off, t; | |
7660 | ||
6d4d7b0e PB |
7661 | if (expr == stop_ref && TREE_CODE (expr) != ERROR_MARK) |
7662 | return size_zero_node; | |
7663 | ||
ee8a6a3e RH |
7664 | switch (TREE_CODE (expr)) |
7665 | { | |
7666 | case ERROR_MARK: | |
7667 | return expr; | |
7668 | ||
545b7d8c VR |
7669 | case VAR_DECL: |
7670 | error ("cannot apply %<offsetof%> to static data member %qD", expr); | |
7671 | return error_mark_node; | |
7672 | ||
6d4d7b0e PB |
7673 | case CALL_EXPR: |
7674 | error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded"); | |
7675 | return error_mark_node; | |
7676 | ||
7677 | case INTEGER_CST: | |
7678 | gcc_assert (integer_zerop (expr)); | |
ee8a6a3e RH |
7679 | return size_zero_node; |
7680 | ||
6d4d7b0e PB |
7681 | case NOP_EXPR: |
7682 | case INDIRECT_REF: | |
7683 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); | |
7684 | gcc_assert (base == error_mark_node || base == size_zero_node); | |
7685 | return base; | |
7686 | ||
ee8a6a3e | 7687 | case COMPONENT_REF: |
6d4d7b0e | 7688 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
ee8a6a3e RH |
7689 | if (base == error_mark_node) |
7690 | return base; | |
7691 | ||
7692 | t = TREE_OPERAND (expr, 1); | |
7693 | if (DECL_C_BIT_FIELD (t)) | |
7694 | { | |
7695 | error ("attempt to take address of bit-field structure " | |
c51a1ba9 | 7696 | "member %qD", t); |
ee8a6a3e RH |
7697 | return error_mark_node; |
7698 | } | |
7699 | off = size_binop (PLUS_EXPR, DECL_FIELD_OFFSET (t), | |
7700 | size_int (tree_low_cst (DECL_FIELD_BIT_OFFSET (t), 1) | |
7701 | / BITS_PER_UNIT)); | |
7702 | break; | |
7703 | ||
7704 | case ARRAY_REF: | |
6d4d7b0e | 7705 | base = fold_offsetof_1 (TREE_OPERAND (expr, 0), stop_ref); |
ee8a6a3e RH |
7706 | if (base == error_mark_node) |
7707 | return base; | |
7708 | ||
7709 | t = TREE_OPERAND (expr, 1); | |
7710 | if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) < 0) | |
7711 | { | |
7712 | code = MINUS_EXPR; | |
987b67bc | 7713 | t = fold_build1 (NEGATE_EXPR, TREE_TYPE (t), t); |
ee8a6a3e RH |
7714 | } |
7715 | t = convert (sizetype, t); | |
7716 | off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t); | |
7717 | break; | |
7718 | ||
1916c916 VR |
7719 | case COMPOUND_EXPR: |
7720 | /* Handle static members of volatile structs. */ | |
7721 | t = TREE_OPERAND (expr, 1); | |
7722 | gcc_assert (TREE_CODE (t) == VAR_DECL); | |
7723 | return fold_offsetof_1 (t, stop_ref); | |
7724 | ||
ee8a6a3e | 7725 | default: |
366de0ce | 7726 | gcc_unreachable (); |
ee8a6a3e RH |
7727 | } |
7728 | ||
7729 | return size_binop (code, base, off); | |
7730 | } | |
7731 | ||
7732 | tree | |
6d4d7b0e | 7733 | fold_offsetof (tree expr, tree stop_ref) |
ee8a6a3e RH |
7734 | { |
7735 | /* Convert back from the internal sizetype to size_t. */ | |
6d4d7b0e | 7736 | return convert (size_type_node, fold_offsetof_1 (expr, stop_ref)); |
ee8a6a3e RH |
7737 | } |
7738 | ||
37dc0d8d | 7739 | /* Print an error message for an invalid lvalue. USE says |
5ae9ba3e MM |
7740 | how the lvalue is being used and so selects the error message. */ |
7741 | ||
37dc0d8d JM |
7742 | void |
7743 | lvalue_error (enum lvalue_use use) | |
5ae9ba3e | 7744 | { |
37dc0d8d | 7745 | switch (use) |
5ae9ba3e | 7746 | { |
37dc0d8d | 7747 | case lv_assign: |
5d352b2d | 7748 | error ("lvalue required as left operand of assignment"); |
37dc0d8d JM |
7749 | break; |
7750 | case lv_increment: | |
5d352b2d | 7751 | error ("lvalue required as increment operand"); |
37dc0d8d JM |
7752 | break; |
7753 | case lv_decrement: | |
5d352b2d | 7754 | error ("lvalue required as decrement operand"); |
37dc0d8d JM |
7755 | break; |
7756 | case lv_addressof: | |
5d352b2d | 7757 | error ("lvalue required as unary %<&%> operand"); |
37dc0d8d JM |
7758 | break; |
7759 | case lv_asm: | |
5d352b2d | 7760 | error ("lvalue required in asm statement"); |
37dc0d8d JM |
7761 | break; |
7762 | default: | |
7763 | gcc_unreachable (); | |
5ae9ba3e | 7764 | } |
5ae9ba3e | 7765 | } |
aab038d5 RH |
7766 | \f |
7767 | /* *PTYPE is an incomplete array. Complete it with a domain based on | |
7768 | INITIAL_VALUE. If INITIAL_VALUE is not present, use 1 if DO_DEFAULT | |
7769 | is true. Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, | |
7770 | 2 if INITIAL_VALUE was NULL, and 3 if INITIAL_VALUE was empty. */ | |
7771 | ||
7772 | int | |
7773 | complete_array_type (tree *ptype, tree initial_value, bool do_default) | |
7774 | { | |
7775 | tree maxindex, type, main_type, elt, unqual_elt; | |
7776 | int failure = 0, quals; | |
06d40de8 | 7777 | hashval_t hashcode = 0; |
aab038d5 RH |
7778 | |
7779 | maxindex = size_zero_node; | |
7780 | if (initial_value) | |
7781 | { | |
7782 | if (TREE_CODE (initial_value) == STRING_CST) | |
7783 | { | |
7784 | int eltsize | |
7785 | = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value))); | |
7786 | maxindex = size_int (TREE_STRING_LENGTH (initial_value)/eltsize - 1); | |
7787 | } | |
7788 | else if (TREE_CODE (initial_value) == CONSTRUCTOR) | |
7789 | { | |
4038c495 | 7790 | VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value); |
aab038d5 | 7791 | |
4038c495 | 7792 | if (VEC_empty (constructor_elt, v)) |
aab038d5 RH |
7793 | { |
7794 | if (pedantic) | |
7795 | failure = 3; | |
7796 | maxindex = integer_minus_one_node; | |
7797 | } | |
7798 | else | |
7799 | { | |
7800 | tree curindex; | |
4038c495 GB |
7801 | unsigned HOST_WIDE_INT cnt; |
7802 | constructor_elt *ce; | |
aab038d5 | 7803 | |
4038c495 GB |
7804 | if (VEC_index (constructor_elt, v, 0)->index) |
7805 | maxindex = fold_convert (sizetype, | |
7806 | VEC_index (constructor_elt, | |
7807 | v, 0)->index); | |
aab038d5 RH |
7808 | curindex = maxindex; |
7809 | ||
4038c495 GB |
7810 | for (cnt = 1; |
7811 | VEC_iterate (constructor_elt, v, cnt, ce); | |
7812 | cnt++) | |
aab038d5 | 7813 | { |
4038c495 GB |
7814 | if (ce->index) |
7815 | curindex = fold_convert (sizetype, ce->index); | |
aab038d5 RH |
7816 | else |
7817 | curindex = size_binop (PLUS_EXPR, curindex, size_one_node); | |
7818 | ||
7819 | if (tree_int_cst_lt (maxindex, curindex)) | |
7820 | maxindex = curindex; | |
7821 | } | |
7822 | } | |
7823 | } | |
7824 | else | |
7825 | { | |
7826 | /* Make an error message unless that happened already. */ | |
7827 | if (initial_value != error_mark_node) | |
7828 | failure = 1; | |
7829 | } | |
7830 | } | |
7831 | else | |
7832 | { | |
7833 | failure = 2; | |
7834 | if (!do_default) | |
7835 | return failure; | |
7836 | } | |
7837 | ||
7838 | type = *ptype; | |
7839 | elt = TREE_TYPE (type); | |
7840 | quals = TYPE_QUALS (strip_array_types (elt)); | |
7841 | if (quals == 0) | |
7842 | unqual_elt = elt; | |
7843 | else | |
7844 | unqual_elt = c_build_qualified_type (elt, TYPE_UNQUALIFIED); | |
7845 | ||
7846 | /* Using build_distinct_type_copy and modifying things afterward instead | |
7847 | of using build_array_type to create a new type preserves all of the | |
7848 | TYPE_LANG_FLAG_? bits that the front end may have set. */ | |
7849 | main_type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
7850 | TREE_TYPE (main_type) = unqual_elt; | |
7851 | TYPE_DOMAIN (main_type) = build_index_type (maxindex); | |
7852 | layout_type (main_type); | |
7853 | ||
06d40de8 DG |
7854 | /* Make sure we have the canonical MAIN_TYPE. */ |
7855 | hashcode = iterative_hash_object (TYPE_HASH (unqual_elt), hashcode); | |
7856 | hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (main_type)), | |
7857 | hashcode); | |
7858 | main_type = type_hash_canon (hashcode, main_type); | |
7859 | ||
9ae165a0 DG |
7860 | /* Fix the canonical type. */ |
7861 | if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (main_type)) | |
7862 | || TYPE_STRUCTURAL_EQUALITY_P (TYPE_DOMAIN (main_type))) | |
7863 | SET_TYPE_STRUCTURAL_EQUALITY (main_type); | |
7864 | else if (TYPE_CANONICAL (TREE_TYPE (main_type)) != TREE_TYPE (main_type) | |
7865 | || (TYPE_CANONICAL (TYPE_DOMAIN (main_type)) | |
7866 | != TYPE_DOMAIN (main_type))) | |
7867 | TYPE_CANONICAL (main_type) | |
7868 | = build_array_type (TYPE_CANONICAL (TREE_TYPE (main_type)), | |
7869 | TYPE_CANONICAL (TYPE_DOMAIN (main_type))); | |
7870 | else | |
7871 | TYPE_CANONICAL (main_type) = main_type; | |
7872 | ||
aab038d5 RH |
7873 | if (quals == 0) |
7874 | type = main_type; | |
7875 | else | |
7876 | type = c_build_qualified_type (main_type, quals); | |
7877 | ||
7bfcb402 JM |
7878 | if (COMPLETE_TYPE_P (type) |
7879 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST | |
7880 | && TREE_OVERFLOW (TYPE_SIZE_UNIT (type))) | |
7881 | { | |
7882 | error ("size of array is too large"); | |
7883 | /* If we proceed with the array type as it is, we'll eventually | |
7884 | crash in tree_low_cst(). */ | |
7885 | type = error_mark_node; | |
7886 | } | |
7887 | ||
aab038d5 RH |
7888 | *ptype = type; |
7889 | return failure; | |
7890 | } | |
5ae9ba3e | 7891 | |
48ae6c13 RH |
7892 | \f |
7893 | /* Used to help initialize the builtin-types.def table. When a type of | |
7894 | the correct size doesn't exist, use error_mark_node instead of NULL. | |
7895 | The later results in segfaults even when a decl using the type doesn't | |
7896 | get invoked. */ | |
7897 | ||
7898 | tree | |
7899 | builtin_type_for_size (int size, bool unsignedp) | |
7900 | { | |
7901 | tree type = lang_hooks.types.type_for_size (size, unsignedp); | |
7902 | return type ? type : error_mark_node; | |
7903 | } | |
7904 | ||
7905 | /* A helper function for resolve_overloaded_builtin in resolving the | |
7906 | overloaded __sync_ builtins. Returns a positive power of 2 if the | |
7907 | first operand of PARAMS is a pointer to a supported data type. | |
7908 | Returns 0 if an error is encountered. */ | |
7909 | ||
7910 | static int | |
7911 | sync_resolve_size (tree function, tree params) | |
7912 | { | |
7913 | tree type; | |
7914 | int size; | |
7915 | ||
7916 | if (params == NULL) | |
7917 | { | |
7918 | error ("too few arguments to function %qE", function); | |
7919 | return 0; | |
7920 | } | |
7921 | ||
7922 | type = TREE_TYPE (TREE_VALUE (params)); | |
7923 | if (TREE_CODE (type) != POINTER_TYPE) | |
7924 | goto incompatible; | |
7925 | ||
7926 | type = TREE_TYPE (type); | |
7927 | if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) | |
7928 | goto incompatible; | |
7929 | ||
7930 | size = tree_low_cst (TYPE_SIZE_UNIT (type), 1); | |
a0274e3e | 7931 | if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) |
48ae6c13 RH |
7932 | return size; |
7933 | ||
7934 | incompatible: | |
7935 | error ("incompatible type for argument %d of %qE", 1, function); | |
7936 | return 0; | |
7937 | } | |
7938 | ||
c22cacf3 | 7939 | /* A helper function for resolve_overloaded_builtin. Adds casts to |
48ae6c13 RH |
7940 | PARAMS to make arguments match up with those of FUNCTION. Drops |
7941 | the variadic arguments at the end. Returns false if some error | |
7942 | was encountered; true on success. */ | |
7943 | ||
7944 | static bool | |
7945 | sync_resolve_params (tree orig_function, tree function, tree params) | |
7946 | { | |
7947 | tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); | |
7948 | tree ptype; | |
7949 | int number; | |
7950 | ||
7951 | /* We've declared the implementation functions to use "volatile void *" | |
7952 | as the pointer parameter, so we shouldn't get any complaints from the | |
7953 | call to check_function_arguments what ever type the user used. */ | |
7954 | arg_types = TREE_CHAIN (arg_types); | |
7955 | ptype = TREE_TYPE (TREE_TYPE (TREE_VALUE (params))); | |
7956 | number = 2; | |
7957 | ||
7958 | /* For the rest of the values, we need to cast these to FTYPE, so that we | |
7959 | don't get warnings for passing pointer types, etc. */ | |
7960 | while (arg_types != void_list_node) | |
7961 | { | |
7962 | tree val; | |
7963 | ||
7964 | params = TREE_CHAIN (params); | |
7965 | if (params == NULL) | |
7966 | { | |
7967 | error ("too few arguments to function %qE", orig_function); | |
7968 | return false; | |
7969 | } | |
7970 | ||
7971 | /* ??? Ideally for the first conversion we'd use convert_for_assignment | |
7972 | so that we get warnings for anything that doesn't match the pointer | |
7973 | type. This isn't portable across the C and C++ front ends atm. */ | |
7974 | val = TREE_VALUE (params); | |
7975 | val = convert (ptype, val); | |
7976 | val = convert (TREE_VALUE (arg_types), val); | |
7977 | TREE_VALUE (params) = val; | |
7978 | ||
7979 | arg_types = TREE_CHAIN (arg_types); | |
7980 | number++; | |
7981 | } | |
7982 | ||
7983 | /* The definition of these primitives is variadic, with the remaining | |
7984 | being "an optional list of variables protected by the memory barrier". | |
7985 | No clue what that's supposed to mean, precisely, but we consider all | |
7986 | call-clobbered variables to be protected so we're safe. */ | |
7987 | TREE_CHAIN (params) = NULL; | |
7988 | ||
7989 | return true; | |
7990 | } | |
7991 | ||
c22cacf3 | 7992 | /* A helper function for resolve_overloaded_builtin. Adds a cast to |
48ae6c13 RH |
7993 | RESULT to make it match the type of the first pointer argument in |
7994 | PARAMS. */ | |
7995 | ||
7996 | static tree | |
7997 | sync_resolve_return (tree params, tree result) | |
7998 | { | |
7999 | tree ptype = TREE_TYPE (TREE_TYPE (TREE_VALUE (params))); | |
99db1ef0 | 8000 | ptype = TYPE_MAIN_VARIANT (ptype); |
48ae6c13 RH |
8001 | return convert (ptype, result); |
8002 | } | |
8003 | ||
8004 | /* Some builtin functions are placeholders for other expressions. This | |
8005 | function should be called immediately after parsing the call expression | |
8006 | before surrounding code has committed to the type of the expression. | |
8007 | ||
8008 | FUNCTION is the DECL that has been invoked; it is known to be a builtin. | |
8009 | PARAMS is the argument list for the call. The return value is non-null | |
8010 | when expansion is complete, and null if normal processing should | |
8011 | continue. */ | |
8012 | ||
8013 | tree | |
8014 | resolve_overloaded_builtin (tree function, tree params) | |
8015 | { | |
8016 | enum built_in_function orig_code = DECL_FUNCTION_CODE (function); | |
58646b77 PB |
8017 | switch (DECL_BUILT_IN_CLASS (function)) |
8018 | { | |
8019 | case BUILT_IN_NORMAL: | |
8020 | break; | |
8021 | case BUILT_IN_MD: | |
8022 | if (targetm.resolve_overloaded_builtin) | |
c22cacf3 | 8023 | return targetm.resolve_overloaded_builtin (function, params); |
58646b77 | 8024 | else |
c22cacf3 | 8025 | return NULL_TREE; |
58646b77 PB |
8026 | default: |
8027 | return NULL_TREE; | |
8028 | } | |
c22cacf3 | 8029 | |
58646b77 | 8030 | /* Handle BUILT_IN_NORMAL here. */ |
48ae6c13 RH |
8031 | switch (orig_code) |
8032 | { | |
8033 | case BUILT_IN_FETCH_AND_ADD_N: | |
8034 | case BUILT_IN_FETCH_AND_SUB_N: | |
8035 | case BUILT_IN_FETCH_AND_OR_N: | |
8036 | case BUILT_IN_FETCH_AND_AND_N: | |
8037 | case BUILT_IN_FETCH_AND_XOR_N: | |
8038 | case BUILT_IN_FETCH_AND_NAND_N: | |
8039 | case BUILT_IN_ADD_AND_FETCH_N: | |
8040 | case BUILT_IN_SUB_AND_FETCH_N: | |
8041 | case BUILT_IN_OR_AND_FETCH_N: | |
8042 | case BUILT_IN_AND_AND_FETCH_N: | |
8043 | case BUILT_IN_XOR_AND_FETCH_N: | |
8044 | case BUILT_IN_NAND_AND_FETCH_N: | |
8045 | case BUILT_IN_BOOL_COMPARE_AND_SWAP_N: | |
8046 | case BUILT_IN_VAL_COMPARE_AND_SWAP_N: | |
8047 | case BUILT_IN_LOCK_TEST_AND_SET_N: | |
8048 | case BUILT_IN_LOCK_RELEASE_N: | |
8049 | { | |
8050 | int n = sync_resolve_size (function, params); | |
8051 | tree new_function, result; | |
8052 | ||
8053 | if (n == 0) | |
8054 | return error_mark_node; | |
8055 | ||
8056 | new_function = built_in_decls[orig_code + exact_log2 (n) + 1]; | |
8057 | if (!sync_resolve_params (function, new_function, params)) | |
8058 | return error_mark_node; | |
8059 | ||
8060 | result = build_function_call (new_function, params); | |
8061 | if (orig_code != BUILT_IN_BOOL_COMPARE_AND_SWAP_N | |
8062 | && orig_code != BUILT_IN_LOCK_RELEASE_N) | |
8063 | result = sync_resolve_return (params, result); | |
8064 | ||
8065 | return result; | |
8066 | } | |
8067 | ||
8068 | default: | |
58646b77 | 8069 | return NULL_TREE; |
48ae6c13 RH |
8070 | } |
8071 | } | |
8072 | ||
5bed876a AH |
8073 | /* Ignoring their sign, return true if two scalar types are the same. */ |
8074 | bool | |
8075 | same_scalar_type_ignoring_signedness (tree t1, tree t2) | |
8076 | { | |
8077 | enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2); | |
8078 | ||
ab22c1fa CF |
8079 | gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE) |
8080 | && (c2 == INTEGER_TYPE || c2 == REAL_TYPE | |
8081 | || c2 == FIXED_POINT_TYPE)); | |
5bed876a AH |
8082 | |
8083 | /* Equality works here because c_common_signed_type uses | |
8084 | TYPE_MAIN_VARIANT. */ | |
12753674 RE |
8085 | return c_common_signed_type (t1) |
8086 | == c_common_signed_type (t2); | |
5bed876a AH |
8087 | } |
8088 | ||
104f8784 KG |
8089 | /* Check for missing format attributes on function pointers. LTYPE is |
8090 | the new type or left-hand side type. RTYPE is the old type or | |
8091 | right-hand side type. Returns TRUE if LTYPE is missing the desired | |
8092 | attribute. */ | |
8093 | ||
8094 | bool | |
8095 | check_missing_format_attribute (tree ltype, tree rtype) | |
8096 | { | |
8097 | tree const ttr = TREE_TYPE (rtype), ttl = TREE_TYPE (ltype); | |
8098 | tree ra; | |
8099 | ||
8100 | for (ra = TYPE_ATTRIBUTES (ttr); ra; ra = TREE_CHAIN (ra)) | |
8101 | if (is_attribute_p ("format", TREE_PURPOSE (ra))) | |
8102 | break; | |
8103 | if (ra) | |
8104 | { | |
8105 | tree la; | |
8106 | for (la = TYPE_ATTRIBUTES (ttl); la; la = TREE_CHAIN (la)) | |
8107 | if (is_attribute_p ("format", TREE_PURPOSE (la))) | |
8108 | break; | |
8109 | return !la; | |
8110 | } | |
8111 | else | |
8112 | return false; | |
8113 | } | |
8114 | ||
ff6b6641 GDR |
8115 | /* Subscripting with type char is likely to lose on a machine where |
8116 | chars are signed. So warn on any machine, but optionally. Don't | |
8117 | warn for unsigned char since that type is safe. Don't warn for | |
8118 | signed char because anyone who uses that must have done so | |
8119 | deliberately. Furthermore, we reduce the false positive load by | |
8120 | warning only for non-constant value of type char. */ | |
8121 | ||
8122 | void | |
8123 | warn_array_subscript_with_type_char (tree index) | |
8124 | { | |
8125 | if (TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node | |
8126 | && TREE_CODE (index) != INTEGER_CST) | |
8127 | warning (OPT_Wchar_subscripts, "array subscript has type %<char%>"); | |
8128 | } | |
8129 | ||
2a67bec2 ILT |
8130 | /* Implement -Wparentheses for the unexpected C precedence rules, to |
8131 | cover cases like x + y << z which readers are likely to | |
8132 | misinterpret. We have seen an expression in which CODE is a binary | |
8133 | operator used to combine expressions headed by CODE_LEFT and | |
8134 | CODE_RIGHT. CODE_LEFT and CODE_RIGHT may be ERROR_MARK, which | |
8135 | means that that side of the expression was not formed using a | |
8136 | binary operator, or it was enclosed in parentheses. */ | |
8137 | ||
8138 | void | |
8139 | warn_about_parentheses (enum tree_code code, enum tree_code code_left, | |
8140 | enum tree_code code_right) | |
8141 | { | |
8142 | if (!warn_parentheses) | |
8143 | return; | |
8144 | ||
8145 | if (code == LSHIFT_EXPR || code == RSHIFT_EXPR) | |
8146 | { | |
8147 | if (code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
8148 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
8149 | warning (OPT_Wparentheses, | |
8150 | "suggest parentheses around + or - inside shift"); | |
8151 | } | |
8152 | ||
8153 | if (code == TRUTH_ORIF_EXPR) | |
8154 | { | |
8155 | if (code_left == TRUTH_ANDIF_EXPR | |
8156 | || code_right == TRUTH_ANDIF_EXPR) | |
8157 | warning (OPT_Wparentheses, | |
8158 | "suggest parentheses around && within ||"); | |
8159 | } | |
8160 | ||
8161 | if (code == BIT_IOR_EXPR) | |
8162 | { | |
8163 | if (code_left == BIT_AND_EXPR || code_left == BIT_XOR_EXPR | |
8164 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
8165 | || code_right == BIT_AND_EXPR || code_right == BIT_XOR_EXPR | |
8166 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
8167 | warning (OPT_Wparentheses, | |
8168 | "suggest parentheses around arithmetic in operand of |"); | |
8169 | /* Check cases like x|y==z */ | |
8170 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
8171 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
8172 | warning (OPT_Wparentheses, | |
8173 | "suggest parentheses around comparison in operand of |"); | |
8174 | } | |
8175 | ||
8176 | if (code == BIT_XOR_EXPR) | |
8177 | { | |
8178 | if (code_left == BIT_AND_EXPR | |
8179 | || code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
8180 | || code_right == BIT_AND_EXPR | |
8181 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
8182 | warning (OPT_Wparentheses, | |
8183 | "suggest parentheses around arithmetic in operand of ^"); | |
8184 | /* Check cases like x^y==z */ | |
8185 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
8186 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
8187 | warning (OPT_Wparentheses, | |
8188 | "suggest parentheses around comparison in operand of ^"); | |
8189 | } | |
8190 | ||
8191 | if (code == BIT_AND_EXPR) | |
8192 | { | |
8193 | if (code_left == PLUS_EXPR || code_left == MINUS_EXPR | |
8194 | || code_right == PLUS_EXPR || code_right == MINUS_EXPR) | |
8195 | warning (OPT_Wparentheses, | |
8196 | "suggest parentheses around + or - in operand of &"); | |
8197 | /* Check cases like x&y==z */ | |
8198 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
8199 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
8200 | warning (OPT_Wparentheses, | |
8201 | "suggest parentheses around comparison in operand of &"); | |
8202 | } | |
8203 | ||
e7917d06 DM |
8204 | if (code == EQ_EXPR || code == NE_EXPR) |
8205 | { | |
8206 | if (TREE_CODE_CLASS (code_left) == tcc_comparison | |
8207 | || TREE_CODE_CLASS (code_right) == tcc_comparison) | |
8208 | warning (OPT_Wparentheses, | |
8209 | "suggest parentheses around comparison in operand of %s", | |
8210 | code == EQ_EXPR ? "==" : "!="); | |
8211 | } | |
8212 | else if (TREE_CODE_CLASS (code) == tcc_comparison) | |
8213 | { | |
8214 | if ((TREE_CODE_CLASS (code_left) == tcc_comparison | |
8215 | && code_left != NE_EXPR && code_left != EQ_EXPR) | |
8216 | || (TREE_CODE_CLASS (code_right) == tcc_comparison | |
8217 | && code_right != NE_EXPR && code_right != EQ_EXPR)) | |
8218 | warning (OPT_Wparentheses, "comparisons like X<=Y<=Z do not " | |
8219 | "have their mathematical meaning"); | |
8220 | } | |
2a67bec2 ILT |
8221 | } |
8222 | ||
c616e51b MLI |
8223 | /* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ |
8224 | ||
8225 | void | |
8226 | warn_for_unused_label (tree label) | |
8227 | { | |
8228 | if (!TREE_USED (label)) | |
8229 | { | |
8230 | if (DECL_INITIAL (label)) | |
8231 | warning (OPT_Wunused_label, "label %q+D defined but not used", label); | |
8232 | else | |
8233 | warning (OPT_Wunused_label, "label %q+D declared but not defined", label); | |
8234 | } | |
8235 | } | |
ff6b6641 | 8236 | |
1f1d5130 MS |
8237 | #ifndef TARGET_HAS_TARGETCM |
8238 | struct gcc_targetcm targetcm = TARGETCM_INITIALIZER; | |
8239 | #endif | |
8240 | ||
2e9cb75e MLI |
8241 | /* Warn for division by zero according to the value of DIVISOR. */ |
8242 | ||
8243 | void | |
8244 | warn_for_div_by_zero (tree divisor) | |
8245 | { | |
ab22c1fa CF |
8246 | /* If DIVISOR is zero, and has integral or fixed-point type, issue a warning |
8247 | about division by zero. Do not issue a warning if DIVISOR has a | |
2e9cb75e MLI |
8248 | floating-point type, since we consider 0.0/0.0 a valid way of |
8249 | generating a NaN. */ | |
ab22c1fa CF |
8250 | if (skip_evaluation == 0 |
8251 | && (integer_zerop (divisor) || fixed_zerop (divisor))) | |
2e9cb75e MLI |
8252 | warning (OPT_Wdiv_by_zero, "division by zero"); |
8253 | } | |
8254 | ||
2d12797c MLI |
8255 | /* Subroutine of build_binary_op. Give warnings for comparisons |
8256 | between signed and unsigned quantities that may fail. Do the | |
8257 | checking based on the original operand trees ORIG_OP0 and ORIG_OP1, | |
8258 | so that casts will be considered, but default promotions won't | |
8259 | be. | |
8260 | ||
8261 | The arguments of this function map directly to local variables | |
8262 | of build_binary_op. */ | |
8263 | ||
8264 | void | |
8265 | warn_for_sign_compare (tree orig_op0, tree orig_op1, | |
8266 | tree op0, tree op1, | |
8267 | tree result_type, enum tree_code resultcode) | |
8268 | { | |
8269 | int op0_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op0)); | |
8270 | int op1_signed = !TYPE_UNSIGNED (TREE_TYPE (orig_op1)); | |
8271 | int unsignedp0, unsignedp1; | |
8272 | ||
8273 | /* In C++, check for comparison of different enum types. */ | |
8274 | if (c_dialect_cxx() | |
8275 | && TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE | |
8276 | && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE | |
8277 | && TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0)) | |
8278 | != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1))) | |
8279 | { | |
8280 | warning (OPT_Wsign_compare, "comparison between types %qT and %qT", | |
8281 | TREE_TYPE (orig_op0), TREE_TYPE (orig_op1)); | |
8282 | } | |
8283 | ||
8284 | /* Do not warn if the comparison is being done in a signed type, | |
8285 | since the signed type will only be chosen if it can represent | |
8286 | all the values of the unsigned type. */ | |
8287 | if (!TYPE_UNSIGNED (result_type)) | |
8288 | /* OK */; | |
8289 | /* Do not warn if both operands are unsigned. */ | |
8290 | else if (op0_signed == op1_signed) | |
8291 | /* OK */; | |
8292 | else | |
8293 | { | |
8294 | tree sop, uop; | |
8295 | bool ovf; | |
8296 | ||
8297 | if (op0_signed) | |
8298 | sop = orig_op0, uop = orig_op1; | |
8299 | else | |
8300 | sop = orig_op1, uop = orig_op0; | |
8301 | ||
8302 | STRIP_TYPE_NOPS (sop); | |
8303 | STRIP_TYPE_NOPS (uop); | |
8304 | ||
8305 | /* Do not warn if the signed quantity is an unsuffixed integer | |
8306 | literal (or some static constant expression involving such | |
8307 | literals or a conditional expression involving such literals) | |
8308 | and it is non-negative. */ | |
8309 | if (tree_expr_nonnegative_warnv_p (sop, &ovf)) | |
8310 | /* OK */; | |
8311 | /* Do not warn if the comparison is an equality operation, the | |
8312 | unsigned quantity is an integral constant, and it would fit | |
8313 | in the result if the result were signed. */ | |
8314 | else if (TREE_CODE (uop) == INTEGER_CST | |
8315 | && (resultcode == EQ_EXPR || resultcode == NE_EXPR) | |
8316 | && int_fits_type_p (uop, c_common_signed_type (result_type))) | |
8317 | /* OK */; | |
8318 | /* In C, do not warn if the unsigned quantity is an enumeration | |
8319 | constant and its maximum value would fit in the result if the | |
8320 | result were signed. */ | |
8321 | else if (!c_dialect_cxx() && TREE_CODE (uop) == INTEGER_CST | |
8322 | && TREE_CODE (TREE_TYPE (uop)) == ENUMERAL_TYPE | |
8323 | && int_fits_type_p (TYPE_MAX_VALUE (TREE_TYPE (uop)), | |
8324 | c_common_signed_type (result_type))) | |
8325 | /* OK */; | |
8326 | else | |
8327 | warning (OPT_Wsign_compare, | |
8328 | "comparison between signed and unsigned integer expressions"); | |
8329 | } | |
8330 | ||
8331 | /* Warn if two unsigned values are being compared in a size larger | |
8332 | than their original size, and one (and only one) is the result of | |
8333 | a `~' operator. This comparison will always fail. | |
8334 | ||
8335 | Also warn if one operand is a constant, and the constant does not | |
8336 | have all bits set that are set in the ~ operand when it is | |
8337 | extended. */ | |
8338 | ||
8339 | op0 = get_narrower (op0, &unsignedp0); | |
8340 | op1 = get_narrower (op1, &unsignedp1); | |
8341 | ||
8342 | if ((TREE_CODE (op0) == BIT_NOT_EXPR) | |
8343 | ^ (TREE_CODE (op1) == BIT_NOT_EXPR)) | |
8344 | { | |
8345 | if (TREE_CODE (op0) == BIT_NOT_EXPR) | |
8346 | op0 = get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); | |
8347 | if (TREE_CODE (op1) == BIT_NOT_EXPR) | |
8348 | op1 = get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); | |
8349 | ||
8350 | if (host_integerp (op0, 0) || host_integerp (op1, 0)) | |
8351 | { | |
8352 | tree primop; | |
8353 | HOST_WIDE_INT constant, mask; | |
8354 | int unsignedp; | |
8355 | unsigned int bits; | |
8356 | ||
8357 | if (host_integerp (op0, 0)) | |
8358 | { | |
8359 | primop = op1; | |
8360 | unsignedp = unsignedp1; | |
8361 | constant = tree_low_cst (op0, 0); | |
8362 | } | |
8363 | else | |
8364 | { | |
8365 | primop = op0; | |
8366 | unsignedp = unsignedp0; | |
8367 | constant = tree_low_cst (op1, 0); | |
8368 | } | |
8369 | ||
8370 | bits = TYPE_PRECISION (TREE_TYPE (primop)); | |
8371 | if (bits < TYPE_PRECISION (result_type) | |
8372 | && bits < HOST_BITS_PER_LONG && unsignedp) | |
8373 | { | |
8374 | mask = (~ (HOST_WIDE_INT) 0) << bits; | |
8375 | if ((mask & constant) != mask) | |
8376 | { | |
8377 | if (constant == 0) | |
8378 | warning (OPT_Wsign_compare, | |
8379 | "promoted ~unsigned is always non-zero"); | |
8380 | else | |
8381 | warning (OPT_Wsign_compare, | |
8382 | "comparison of promoted ~unsigned with constant"); | |
8383 | } | |
8384 | } | |
8385 | } | |
8386 | else if (unsignedp0 && unsignedp1 | |
8387 | && (TYPE_PRECISION (TREE_TYPE (op0)) | |
8388 | < TYPE_PRECISION (result_type)) | |
8389 | && (TYPE_PRECISION (TREE_TYPE (op1)) | |
8390 | < TYPE_PRECISION (result_type))) | |
8391 | warning (OPT_Wsign_compare, | |
8392 | "comparison of promoted ~unsigned with unsigned"); | |
8393 | } | |
8394 | } | |
8395 | ||
e2500fed | 8396 | #include "gt-c-common.h" |