Mercurial > hg > CbC > CbC_gcc
annotate gcc/c-pragma.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | 3bfb6c00c1e0 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack. |
| 2 Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, | |
| 3 2006, 2007, 2008 Free Software Foundation, Inc. | |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 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 | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 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. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "tm.h" | |
| 25 #include "rtl.h" | |
| 26 #include "tree.h" | |
| 27 #include "function.h" | |
| 28 #include "cpplib.h" | |
| 29 #include "c-pragma.h" | |
| 30 #include "flags.h" | |
| 31 #include "toplev.h" | |
| 32 #include "ggc.h" | |
| 33 #include "c-common.h" | |
| 34 #include "output.h" | |
| 35 #include "tm_p.h" | |
| 36 #include "vec.h" | |
| 37 #include "target.h" | |
| 38 #include "diagnostic.h" | |
| 39 #include "opts.h" | |
|
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changeset
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40 #include "plugin.h" |
| 0 | 41 |
| 42 #define GCC_BAD(gmsgid) \ | |
| 43 do { warning (OPT_Wpragmas, gmsgid); return; } while (0) | |
| 44 #define GCC_BAD2(gmsgid, arg) \ | |
| 45 do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0) | |
| 46 | |
|
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47 typedef struct GTY(()) align_stack { |
| 0 | 48 int alignment; |
| 49 tree id; | |
| 50 struct align_stack * prev; | |
| 51 } align_stack; | |
| 52 | |
| 53 static GTY(()) struct align_stack * alignment_stack; | |
| 54 | |
| 55 #ifdef HANDLE_PRAGMA_PACK | |
| 56 static void handle_pragma_pack (cpp_reader *); | |
| 57 | |
| 58 #ifdef HANDLE_PRAGMA_PACK_PUSH_POP | |
| 59 /* If we have a "global" #pragma pack(<n>) in effect when the first | |
| 60 #pragma pack(push,<n>) is encountered, this stores the value of | |
| 61 maximum_field_alignment in effect. When the final pop_alignment() | |
| 62 happens, we restore the value to this, not to a value of 0 for | |
| 63 maximum_field_alignment. Value is in bits. */ | |
| 64 static int default_alignment; | |
| 65 #define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \ | |
| 66 ? &default_alignment \ | |
| 67 : &alignment_stack->alignment) = (ALIGN)) | |
| 68 | |
| 69 static void push_alignment (int, tree); | |
| 70 static void pop_alignment (tree); | |
| 71 | |
| 72 /* Push an alignment value onto the stack. */ | |
| 73 static void | |
| 74 push_alignment (int alignment, tree id) | |
| 75 { | |
| 76 align_stack * entry; | |
| 77 | |
| 78 entry = GGC_NEW (align_stack); | |
| 79 | |
| 80 entry->alignment = alignment; | |
| 81 entry->id = id; | |
| 82 entry->prev = alignment_stack; | |
| 83 | |
| 84 /* The current value of maximum_field_alignment is not necessarily | |
| 85 0 since there may be a #pragma pack(<n>) in effect; remember it | |
| 86 so that we can restore it after the final #pragma pop(). */ | |
| 87 if (alignment_stack == NULL) | |
| 88 default_alignment = maximum_field_alignment; | |
| 89 | |
| 90 alignment_stack = entry; | |
| 91 | |
| 92 maximum_field_alignment = alignment; | |
| 93 } | |
| 94 | |
| 95 /* Undo a push of an alignment onto the stack. */ | |
| 96 static void | |
| 97 pop_alignment (tree id) | |
| 98 { | |
| 99 align_stack * entry; | |
| 100 | |
| 101 if (alignment_stack == NULL) | |
| 102 GCC_BAD ("#pragma pack (pop) encountered without matching #pragma pack (push)"); | |
| 103 | |
| 104 /* If we got an identifier, strip away everything above the target | |
| 105 entry so that the next step will restore the state just below it. */ | |
| 106 if (id) | |
| 107 { | |
| 108 for (entry = alignment_stack; entry; entry = entry->prev) | |
| 109 if (entry->id == id) | |
| 110 { | |
| 111 alignment_stack = entry; | |
| 112 break; | |
| 113 } | |
| 114 if (entry == NULL) | |
| 115 warning (OPT_Wpragmas, "\ | |
|
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parents:
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changeset
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116 #pragma pack(pop, %E) encountered without matching #pragma pack(push, %E)" |
|
77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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117 , id, id); |
| 0 | 118 } |
| 119 | |
| 120 entry = alignment_stack->prev; | |
| 121 | |
| 122 maximum_field_alignment = entry ? entry->alignment : default_alignment; | |
| 123 | |
| 124 alignment_stack = entry; | |
| 125 } | |
| 126 #else /* not HANDLE_PRAGMA_PACK_PUSH_POP */ | |
| 127 #define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN)) | |
| 128 #define push_alignment(ID, N) \ | |
| 129 GCC_BAD ("#pragma pack(push[, id], <n>) is not supported on this target") | |
| 130 #define pop_alignment(ID) \ | |
| 131 GCC_BAD ("#pragma pack(pop[, id], <n>) is not supported on this target") | |
| 132 #endif /* HANDLE_PRAGMA_PACK_PUSH_POP */ | |
| 133 | |
| 134 /* #pragma pack () | |
| 135 #pragma pack (N) | |
| 136 | |
| 137 #pragma pack (push) | |
| 138 #pragma pack (push, N) | |
| 139 #pragma pack (push, ID) | |
| 140 #pragma pack (push, ID, N) | |
| 141 #pragma pack (pop) | |
| 142 #pragma pack (pop, ID) */ | |
| 143 static void | |
| 144 handle_pragma_pack (cpp_reader * ARG_UNUSED (dummy)) | |
| 145 { | |
| 146 tree x, id = 0; | |
| 147 int align = -1; | |
| 148 enum cpp_ttype token; | |
| 149 enum { set, push, pop } action; | |
| 150 | |
| 151 if (pragma_lex (&x) != CPP_OPEN_PAREN) | |
| 152 GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored"); | |
| 153 | |
| 154 token = pragma_lex (&x); | |
| 155 if (token == CPP_CLOSE_PAREN) | |
| 156 { | |
| 157 action = set; | |
| 158 align = initial_max_fld_align; | |
| 159 } | |
| 160 else if (token == CPP_NUMBER) | |
| 161 { | |
| 162 if (TREE_CODE (x) != INTEGER_CST) | |
| 163 GCC_BAD ("invalid constant in %<#pragma pack%> - ignored"); | |
| 164 align = TREE_INT_CST_LOW (x); | |
| 165 action = set; | |
| 166 if (pragma_lex (&x) != CPP_CLOSE_PAREN) | |
| 167 GCC_BAD ("malformed %<#pragma pack%> - ignored"); | |
| 168 } | |
| 169 else if (token == CPP_NAME) | |
| 170 { | |
| 171 #define GCC_BAD_ACTION do { if (action != pop) \ | |
| 172 GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \ | |
| 173 else \ | |
| 174 GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \ | |
| 175 } while (0) | |
| 176 | |
| 177 const char *op = IDENTIFIER_POINTER (x); | |
| 178 if (!strcmp (op, "push")) | |
| 179 action = push; | |
| 180 else if (!strcmp (op, "pop")) | |
| 181 action = pop; | |
| 182 else | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
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183 GCC_BAD2 ("unknown action %qE for %<#pragma pack%> - ignored", x); |
| 0 | 184 |
| 185 while ((token = pragma_lex (&x)) == CPP_COMMA) | |
| 186 { | |
| 187 token = pragma_lex (&x); | |
| 188 if (token == CPP_NAME && id == 0) | |
| 189 { | |
| 190 id = x; | |
| 191 } | |
| 192 else if (token == CPP_NUMBER && action == push && align == -1) | |
| 193 { | |
| 194 if (TREE_CODE (x) != INTEGER_CST) | |
| 195 GCC_BAD ("invalid constant in %<#pragma pack%> - ignored"); | |
| 196 align = TREE_INT_CST_LOW (x); | |
| 197 if (align == -1) | |
| 198 action = set; | |
| 199 } | |
| 200 else | |
| 201 GCC_BAD_ACTION; | |
| 202 } | |
| 203 | |
| 204 if (token != CPP_CLOSE_PAREN) | |
| 205 GCC_BAD_ACTION; | |
| 206 #undef GCC_BAD_ACTION | |
| 207 } | |
| 208 else | |
| 209 GCC_BAD ("malformed %<#pragma pack%> - ignored"); | |
| 210 | |
| 211 if (pragma_lex (&x) != CPP_EOF) | |
| 212 warning (OPT_Wpragmas, "junk at end of %<#pragma pack%>"); | |
| 213 | |
| 214 if (flag_pack_struct) | |
| 215 GCC_BAD ("#pragma pack has no effect with -fpack-struct - ignored"); | |
| 216 | |
| 217 if (action != pop) | |
| 218 switch (align) | |
| 219 { | |
| 220 case 0: | |
| 221 case 1: | |
| 222 case 2: | |
| 223 case 4: | |
| 224 case 8: | |
| 225 case 16: | |
| 226 align *= BITS_PER_UNIT; | |
| 227 break; | |
| 228 case -1: | |
| 229 if (action == push) | |
| 230 { | |
| 231 align = maximum_field_alignment; | |
| 232 break; | |
| 233 } | |
| 234 default: | |
| 235 GCC_BAD2 ("alignment must be a small power of two, not %d", align); | |
| 236 } | |
| 237 | |
| 238 switch (action) | |
| 239 { | |
| 240 case set: SET_GLOBAL_ALIGNMENT (align); break; | |
| 241 case push: push_alignment (align, id); break; | |
| 242 case pop: pop_alignment (id); break; | |
| 243 } | |
| 244 } | |
| 245 #endif /* HANDLE_PRAGMA_PACK */ | |
| 246 | |
| 247 static GTY(()) tree pending_weaks; | |
| 248 | |
| 249 #ifdef HANDLE_PRAGMA_WEAK | |
| 250 static void apply_pragma_weak (tree, tree); | |
| 251 static void handle_pragma_weak (cpp_reader *); | |
| 252 | |
| 253 static void | |
| 254 apply_pragma_weak (tree decl, tree value) | |
| 255 { | |
| 256 if (value) | |
| 257 { | |
| 258 value = build_string (IDENTIFIER_LENGTH (value), | |
| 259 IDENTIFIER_POINTER (value)); | |
| 260 decl_attributes (&decl, build_tree_list (get_identifier ("alias"), | |
| 261 build_tree_list (NULL, value)), | |
| 262 0); | |
| 263 } | |
| 264 | |
| 265 if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl) | |
| 266 && !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */ | |
| 267 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) | |
| 268 warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use " | |
| 269 "results in unspecified behavior", decl); | |
| 270 | |
| 271 declare_weak (decl); | |
| 272 } | |
| 273 | |
| 274 void | |
| 275 maybe_apply_pragma_weak (tree decl) | |
| 276 { | |
| 277 tree *p, t, id; | |
| 278 | |
| 279 /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */ | |
| 280 | |
| 281 /* No weak symbols pending, take the short-cut. */ | |
| 282 if (!pending_weaks) | |
| 283 return; | |
| 284 /* If it's not visible outside this file, it doesn't matter whether | |
| 285 it's weak. */ | |
| 286 if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl)) | |
| 287 return; | |
| 288 /* If it's not a function or a variable, it can't be weak. | |
| 289 FIXME: what kinds of things are visible outside this file but | |
| 290 aren't functions or variables? Should this be an assert instead? */ | |
| 291 if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) | |
| 292 return; | |
| 293 | |
| 294 id = DECL_ASSEMBLER_NAME (decl); | |
| 295 | |
| 296 for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t)) | |
| 297 if (id == TREE_PURPOSE (t)) | |
| 298 { | |
| 299 apply_pragma_weak (decl, TREE_VALUE (t)); | |
| 300 *p = TREE_CHAIN (t); | |
| 301 break; | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 /* Process all "#pragma weak A = B" directives where we have not seen | |
| 306 a decl for A. */ | |
| 307 void | |
| 308 maybe_apply_pending_pragma_weaks (void) | |
| 309 { | |
| 310 tree *p, t, alias_id, id, decl, *next; | |
| 311 | |
| 312 for (p = &pending_weaks; (t = *p) ; p = next) | |
| 313 { | |
| 314 next = &TREE_CHAIN (t); | |
| 315 alias_id = TREE_PURPOSE (t); | |
| 316 id = TREE_VALUE (t); | |
| 317 | |
| 318 if (TREE_VALUE (t) == NULL) | |
| 319 continue; | |
| 320 | |
|
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77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
321 decl = build_decl (UNKNOWN_LOCATION, |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
322 FUNCTION_DECL, alias_id, default_function_type); |
| 0 | 323 |
| 324 DECL_ARTIFICIAL (decl) = 1; | |
| 325 TREE_PUBLIC (decl) = 1; | |
| 326 DECL_EXTERNAL (decl) = 1; | |
| 327 DECL_WEAK (decl) = 1; | |
| 328 | |
| 329 assemble_alias (decl, id); | |
| 330 } | |
| 331 } | |
| 332 | |
| 333 /* #pragma weak name [= value] */ | |
| 334 static void | |
| 335 handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy)) | |
| 336 { | |
| 337 tree name, value, x, decl; | |
| 338 enum cpp_ttype t; | |
| 339 | |
| 340 value = 0; | |
| 341 | |
| 342 if (pragma_lex (&name) != CPP_NAME) | |
| 343 GCC_BAD ("malformed #pragma weak, ignored"); | |
| 344 t = pragma_lex (&x); | |
| 345 if (t == CPP_EQ) | |
| 346 { | |
| 347 if (pragma_lex (&value) != CPP_NAME) | |
| 348 GCC_BAD ("malformed #pragma weak, ignored"); | |
| 349 t = pragma_lex (&x); | |
| 350 } | |
| 351 if (t != CPP_EOF) | |
| 352 warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>"); | |
| 353 | |
| 354 decl = identifier_global_value (name); | |
| 355 if (decl && DECL_P (decl)) | |
| 356 { | |
| 357 apply_pragma_weak (decl, value); | |
| 358 if (value) | |
| 359 assemble_alias (decl, value); | |
| 360 } | |
| 361 else | |
| 362 pending_weaks = tree_cons (name, value, pending_weaks); | |
| 363 } | |
| 364 #else | |
| 365 void | |
| 366 maybe_apply_pragma_weak (tree ARG_UNUSED (decl)) | |
| 367 { | |
| 368 } | |
| 369 | |
| 370 void | |
| 371 maybe_apply_pending_pragma_weaks (void) | |
| 372 { | |
| 373 } | |
| 374 #endif /* HANDLE_PRAGMA_WEAK */ | |
| 375 | |
| 376 /* GCC supports two #pragma directives for renaming the external | |
| 377 symbol associated with a declaration (DECL_ASSEMBLER_NAME), for | |
| 378 compatibility with the Solaris and Tru64 system headers. GCC also | |
| 379 has its own notation for this, __asm__("name") annotations. | |
| 380 | |
| 381 Corner cases of these features and their interaction: | |
| 382 | |
| 383 1) Both pragmas silently apply only to declarations with external | |
| 384 linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels | |
| 385 do not have this restriction. | |
| 386 | |
| 387 2) In C++, both #pragmas silently apply only to extern "C" declarations. | |
| 388 Asm labels do not have this restriction. | |
| 389 | |
| 390 3) If any of the three ways of changing DECL_ASSEMBLER_NAME is | |
| 391 applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the | |
| 392 new name is different, a warning issues and the name does not change. | |
| 393 | |
| 394 4) The "source name" for #pragma redefine_extname is the DECL_NAME, | |
| 395 *not* the DECL_ASSEMBLER_NAME. | |
| 396 | |
| 397 5) If #pragma extern_prefix is in effect and a declaration occurs | |
| 398 with an __asm__ name, the #pragma extern_prefix is silently | |
| 399 ignored for that declaration. | |
| 400 | |
| 401 6) If #pragma extern_prefix and #pragma redefine_extname apply to | |
| 402 the same declaration, whichever triggered first wins, and a warning | |
| 403 is issued. (We would like to have #pragma redefine_extname always | |
| 404 win, but it can appear either before or after the declaration, and | |
| 405 if it appears afterward, we have no way of knowing whether a modified | |
| 406 DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */ | |
| 407 | |
| 408 static GTY(()) tree pending_redefine_extname; | |
| 409 | |
| 410 static void handle_pragma_redefine_extname (cpp_reader *); | |
| 411 | |
| 412 /* #pragma redefine_extname oldname newname */ | |
| 413 static void | |
| 414 handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy)) | |
| 415 { | |
| 416 tree oldname, newname, decl, x; | |
| 417 enum cpp_ttype t; | |
| 418 | |
| 419 if (pragma_lex (&oldname) != CPP_NAME) | |
| 420 GCC_BAD ("malformed #pragma redefine_extname, ignored"); | |
| 421 if (pragma_lex (&newname) != CPP_NAME) | |
| 422 GCC_BAD ("malformed #pragma redefine_extname, ignored"); | |
| 423 t = pragma_lex (&x); | |
| 424 if (t != CPP_EOF) | |
| 425 warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>"); | |
| 426 | |
| 427 decl = identifier_global_value (oldname); | |
| 428 if (decl | |
| 429 && (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl)) | |
| 430 && (TREE_CODE (decl) == FUNCTION_DECL | |
| 431 || TREE_CODE (decl) == VAR_DECL) | |
| 432 && has_c_linkage (decl)) | |
| 433 { | |
| 434 if (DECL_ASSEMBLER_NAME_SET_P (decl)) | |
| 435 { | |
| 436 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
| 437 name = targetm.strip_name_encoding (name); | |
| 438 | |
| 439 if (strcmp (name, IDENTIFIER_POINTER (newname))) | |
| 440 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
| 441 "conflict with previous rename"); | |
| 442 } | |
| 443 else | |
| 444 change_decl_assembler_name (decl, newname); | |
| 445 } | |
| 446 else | |
| 447 /* We have to add this to the rename list even if there's already | |
| 448 a global value that doesn't meet the above criteria, because in | |
| 449 C++ "struct foo {...};" puts "foo" in the current namespace but | |
| 450 does *not* conflict with a subsequent declaration of a function | |
| 451 or variable foo. See g++.dg/other/pragma-re-2.C. */ | |
| 452 add_to_renaming_pragma_list (oldname, newname); | |
| 453 } | |
| 454 | |
| 455 /* This is called from here and from ia64.c. */ | |
| 456 void | |
| 457 add_to_renaming_pragma_list (tree oldname, tree newname) | |
| 458 { | |
| 459 tree previous = purpose_member (oldname, pending_redefine_extname); | |
| 460 if (previous) | |
| 461 { | |
| 462 if (TREE_VALUE (previous) != newname) | |
| 463 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
| 464 "conflict with previous #pragma redefine_extname"); | |
| 465 return; | |
| 466 } | |
| 467 | |
| 468 pending_redefine_extname | |
| 469 = tree_cons (oldname, newname, pending_redefine_extname); | |
| 470 } | |
| 471 | |
| 472 static GTY(()) tree pragma_extern_prefix; | |
| 473 | |
| 474 /* #pragma extern_prefix "prefix" */ | |
| 475 static void | |
| 476 handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy)) | |
| 477 { | |
| 478 tree prefix, x; | |
| 479 enum cpp_ttype t; | |
| 480 | |
| 481 if (pragma_lex (&prefix) != CPP_STRING) | |
| 482 GCC_BAD ("malformed #pragma extern_prefix, ignored"); | |
| 483 t = pragma_lex (&x); | |
| 484 if (t != CPP_EOF) | |
| 485 warning (OPT_Wpragmas, "junk at end of %<#pragma extern_prefix%>"); | |
| 486 | |
| 487 if (targetm.handle_pragma_extern_prefix) | |
| 488 /* Note that the length includes the null terminator. */ | |
| 489 pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL); | |
| 490 else if (warn_unknown_pragmas > in_system_header) | |
| 491 warning (OPT_Wunknown_pragmas, | |
| 492 "#pragma extern_prefix not supported on this target"); | |
| 493 } | |
| 494 | |
| 495 /* Hook from the front ends to apply the results of one of the preceding | |
| 496 pragmas that rename variables. */ | |
| 497 | |
| 498 tree | |
| 499 maybe_apply_renaming_pragma (tree decl, tree asmname) | |
| 500 { | |
| 501 tree *p, t; | |
| 502 | |
| 503 /* The renaming pragmas are only applied to declarations with | |
| 504 external linkage. */ | |
| 505 if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) | |
| 506 || (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) | |
| 507 || !has_c_linkage (decl)) | |
| 508 return asmname; | |
| 509 | |
| 510 /* If the DECL_ASSEMBLER_NAME is already set, it does not change, | |
| 511 but we may warn about a rename that conflicts. */ | |
| 512 if (DECL_ASSEMBLER_NAME_SET_P (decl)) | |
| 513 { | |
| 514 const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
| 515 oldname = targetm.strip_name_encoding (oldname); | |
| 516 | |
| 517 if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname)) | |
| 518 warning (OPT_Wpragmas, "asm declaration ignored due to " | |
| 519 "conflict with previous rename"); | |
| 520 | |
| 521 /* Take any pending redefine_extname off the list. */ | |
| 522 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t)) | |
| 523 if (DECL_NAME (decl) == TREE_PURPOSE (t)) | |
| 524 { | |
| 525 /* Only warn if there is a conflict. */ | |
| 526 if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname)) | |
| 527 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
| 528 "conflict with previous rename"); | |
| 529 | |
| 530 *p = TREE_CHAIN (t); | |
| 531 break; | |
| 532 } | |
| 533 return 0; | |
| 534 } | |
| 535 | |
| 536 /* Find out if we have a pending #pragma redefine_extname. */ | |
| 537 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t)) | |
| 538 if (DECL_NAME (decl) == TREE_PURPOSE (t)) | |
| 539 { | |
| 540 tree newname = TREE_VALUE (t); | |
| 541 *p = TREE_CHAIN (t); | |
| 542 | |
| 543 /* If we already have an asmname, #pragma redefine_extname is | |
| 544 ignored (with a warning if it conflicts). */ | |
| 545 if (asmname) | |
| 546 { | |
| 547 if (strcmp (TREE_STRING_POINTER (asmname), | |
| 548 IDENTIFIER_POINTER (newname)) != 0) | |
| 549 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
| 550 "conflict with __asm__ declaration"); | |
| 551 return asmname; | |
| 552 } | |
| 553 | |
| 554 /* Otherwise we use what we've got; #pragma extern_prefix is | |
| 555 silently ignored. */ | |
| 556 return build_string (IDENTIFIER_LENGTH (newname), | |
| 557 IDENTIFIER_POINTER (newname)); | |
| 558 } | |
| 559 | |
| 560 /* If we've got an asmname, #pragma extern_prefix is silently ignored. */ | |
| 561 if (asmname) | |
| 562 return asmname; | |
| 563 | |
| 564 /* If #pragma extern_prefix is in effect, apply it. */ | |
| 565 if (pragma_extern_prefix) | |
| 566 { | |
| 567 const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix); | |
| 568 size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1; | |
| 569 | |
| 570 const char *id = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
| 571 size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl)); | |
| 572 | |
| 573 char *newname = (char *) alloca (plen + ilen + 1); | |
| 574 | |
| 575 memcpy (newname, prefix, plen); | |
| 576 memcpy (newname + plen, id, ilen + 1); | |
| 577 | |
| 578 return build_string (plen + ilen, newname); | |
| 579 } | |
| 580 | |
| 581 /* Nada. */ | |
| 582 return 0; | |
| 583 } | |
| 584 | |
| 585 | |
| 586 #ifdef HANDLE_PRAGMA_VISIBILITY | |
| 587 static void handle_pragma_visibility (cpp_reader *); | |
| 588 | |
|
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589 static VEC (int, heap) *visstack; |
| 0 | 590 |
| 591 /* Push the visibility indicated by STR onto the top of the #pragma | |
|
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592 visibility stack. KIND is 0 for #pragma GCC visibility, 1 for |
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593 C++ namespace with visibility attribute and 2 for C++ builtin |
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594 ABI namespace. push_visibility/pop_visibility calls must have |
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595 matching KIND, it is not allowed to push visibility using one |
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596 KIND and pop using a different one. */ |
| 0 | 597 |
| 598 void | |
|
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599 push_visibility (const char *str, int kind) |
| 0 | 600 { |
|
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601 VEC_safe_push (int, heap, visstack, |
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602 ((int) default_visibility) | (kind << 8)); |
| 0 | 603 if (!strcmp (str, "default")) |
| 604 default_visibility = VISIBILITY_DEFAULT; | |
| 605 else if (!strcmp (str, "internal")) | |
| 606 default_visibility = VISIBILITY_INTERNAL; | |
| 607 else if (!strcmp (str, "hidden")) | |
| 608 default_visibility = VISIBILITY_HIDDEN; | |
| 609 else if (!strcmp (str, "protected")) | |
| 610 default_visibility = VISIBILITY_PROTECTED; | |
| 611 else | |
| 612 GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected"); | |
| 613 visibility_options.inpragma = 1; | |
| 614 } | |
| 615 | |
|
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616 /* Pop a level of the #pragma visibility stack. Return true if |
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617 successful. */ |
| 0 | 618 |
|
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619 bool |
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620 pop_visibility (int kind) |
| 0 | 621 { |
|
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622 if (!VEC_length (int, visstack)) |
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623 return false; |
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624 if ((VEC_last (int, visstack) >> 8) != kind) |
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625 return false; |
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626 default_visibility |
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627 = (enum symbol_visibility) (VEC_pop (int, visstack) & 0xff); |
| 0 | 628 visibility_options.inpragma |
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629 = VEC_length (int, visstack) != 0; |
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630 return true; |
| 0 | 631 } |
| 632 | |
| 633 /* Sets the default visibility for symbols to something other than that | |
| 634 specified on the command line. */ | |
| 635 | |
| 636 static void | |
| 637 handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED) | |
| 638 { | |
| 639 /* Form is #pragma GCC visibility push(hidden)|pop */ | |
| 640 tree x; | |
| 641 enum cpp_ttype token; | |
| 642 enum { bad, push, pop } action = bad; | |
| 643 | |
| 644 token = pragma_lex (&x); | |
| 645 if (token == CPP_NAME) | |
| 646 { | |
| 647 const char *op = IDENTIFIER_POINTER (x); | |
| 648 if (!strcmp (op, "push")) | |
| 649 action = push; | |
| 650 else if (!strcmp (op, "pop")) | |
| 651 action = pop; | |
| 652 } | |
| 653 if (bad == action) | |
| 654 GCC_BAD ("#pragma GCC visibility must be followed by push or pop"); | |
| 655 else | |
| 656 { | |
| 657 if (pop == action) | |
| 658 { | |
|
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659 if (! pop_visibility (0)) |
| 0 | 660 GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>"); |
| 661 } | |
| 662 else | |
| 663 { | |
| 664 if (pragma_lex (&x) != CPP_OPEN_PAREN) | |
| 665 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored"); | |
| 666 token = pragma_lex (&x); | |
| 667 if (token != CPP_NAME) | |
| 668 GCC_BAD ("malformed #pragma GCC visibility push"); | |
| 669 else | |
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670 push_visibility (IDENTIFIER_POINTER (x), 0); |
| 0 | 671 if (pragma_lex (&x) != CPP_CLOSE_PAREN) |
| 672 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored"); | |
| 673 } | |
| 674 } | |
| 675 if (pragma_lex (&x) != CPP_EOF) | |
| 676 warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>"); | |
| 677 } | |
| 678 | |
| 679 #endif | |
| 680 | |
| 681 static void | |
| 682 handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy)) | |
| 683 { | |
| 684 const char *kind_string, *option_string; | |
| 685 unsigned int option_index; | |
| 686 enum cpp_ttype token; | |
| 687 diagnostic_t kind; | |
| 688 tree x; | |
| 689 | |
| 690 if (cfun) | |
| 691 { | |
| 692 error ("#pragma GCC diagnostic not allowed inside functions"); | |
| 693 return; | |
| 694 } | |
| 695 | |
| 696 token = pragma_lex (&x); | |
| 697 if (token != CPP_NAME) | |
| 698 GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>"); | |
| 699 kind_string = IDENTIFIER_POINTER (x); | |
| 700 if (strcmp (kind_string, "error") == 0) | |
| 701 kind = DK_ERROR; | |
| 702 else if (strcmp (kind_string, "warning") == 0) | |
| 703 kind = DK_WARNING; | |
| 704 else if (strcmp (kind_string, "ignored") == 0) | |
| 705 kind = DK_IGNORED; | |
| 706 else | |
| 707 GCC_BAD ("expected [error|warning|ignored] after %<#pragma GCC diagnostic%>"); | |
| 708 | |
| 709 token = pragma_lex (&x); | |
| 710 if (token != CPP_STRING) | |
| 711 GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind"); | |
| 712 option_string = TREE_STRING_POINTER (x); | |
| 713 for (option_index = 0; option_index < cl_options_count; option_index++) | |
| 714 if (strcmp (cl_options[option_index].opt_text, option_string) == 0) | |
| 715 { | |
| 716 /* This overrides -Werror, for example. */ | |
| 717 diagnostic_classify_diagnostic (global_dc, option_index, kind); | |
| 718 /* This makes sure the option is enabled, like -Wfoo would do. */ | |
| 719 if (cl_options[option_index].var_type == CLVC_BOOLEAN | |
| 720 && cl_options[option_index].flag_var | |
| 721 && kind != DK_IGNORED) | |
| 722 *(int *) cl_options[option_index].flag_var = 1; | |
| 723 return; | |
| 724 } | |
| 725 GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind"); | |
| 726 } | |
| 727 | |
| 728 /* Parse #pragma GCC target (xxx) to set target specific options. */ | |
| 729 static void | |
| 730 handle_pragma_target(cpp_reader *ARG_UNUSED(dummy)) | |
| 731 { | |
| 732 enum cpp_ttype token; | |
| 733 tree x; | |
| 734 bool close_paren_needed_p = false; | |
| 735 | |
| 736 if (cfun) | |
| 737 { | |
| 738 error ("#pragma GCC option is not allowed inside functions"); | |
| 739 return; | |
| 740 } | |
| 741 | |
| 742 token = pragma_lex (&x); | |
| 743 if (token == CPP_OPEN_PAREN) | |
| 744 { | |
| 745 close_paren_needed_p = true; | |
| 746 token = pragma_lex (&x); | |
| 747 } | |
| 748 | |
| 749 if (token != CPP_STRING) | |
| 750 { | |
| 751 GCC_BAD ("%<#pragma GCC option%> is not a string"); | |
| 752 return; | |
| 753 } | |
| 754 | |
| 755 /* Strings are user options. */ | |
| 756 else | |
| 757 { | |
| 758 tree args = NULL_TREE; | |
| 759 | |
| 760 do | |
| 761 { | |
| 762 /* Build up the strings now as a tree linked list. Skip empty | |
| 763 strings. */ | |
| 764 if (TREE_STRING_LENGTH (x) > 0) | |
| 765 args = tree_cons (NULL_TREE, x, args); | |
| 766 | |
| 767 token = pragma_lex (&x); | |
| 768 while (token == CPP_COMMA) | |
| 769 token = pragma_lex (&x); | |
| 770 } | |
| 771 while (token == CPP_STRING); | |
| 772 | |
| 773 if (close_paren_needed_p) | |
| 774 { | |
| 775 if (token == CPP_CLOSE_PAREN) | |
| 776 token = pragma_lex (&x); | |
| 777 else | |
| 778 GCC_BAD ("%<#pragma GCC target (string [,string]...)%> does " | |
| 779 "not have a final %<)%>."); | |
| 780 } | |
| 781 | |
| 782 if (token != CPP_EOF) | |
| 783 { | |
| 784 error ("#pragma GCC target string... is badly formed"); | |
| 785 return; | |
| 786 } | |
| 787 | |
| 788 /* put arguments in the order the user typed them. */ | |
| 789 args = nreverse (args); | |
| 790 | |
| 791 if (targetm.target_option.pragma_parse (args, NULL_TREE)) | |
| 792 current_target_pragma = args; | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 /* Handle #pragma GCC optimize to set optimization options. */ | |
| 797 static void | |
| 798 handle_pragma_optimize (cpp_reader *ARG_UNUSED(dummy)) | |
| 799 { | |
| 800 enum cpp_ttype token; | |
| 801 tree x; | |
| 802 bool close_paren_needed_p = false; | |
| 803 tree optimization_previous_node = optimization_current_node; | |
| 804 | |
| 805 if (cfun) | |
| 806 { | |
| 807 error ("#pragma GCC optimize is not allowed inside functions"); | |
| 808 return; | |
| 809 } | |
| 810 | |
| 811 token = pragma_lex (&x); | |
| 812 if (token == CPP_OPEN_PAREN) | |
| 813 { | |
| 814 close_paren_needed_p = true; | |
| 815 token = pragma_lex (&x); | |
| 816 } | |
| 817 | |
| 818 if (token != CPP_STRING && token != CPP_NUMBER) | |
| 819 { | |
| 820 GCC_BAD ("%<#pragma GCC optimize%> is not a string or number"); | |
| 821 return; | |
| 822 } | |
| 823 | |
| 824 /* Strings/numbers are user options. */ | |
| 825 else | |
| 826 { | |
| 827 tree args = NULL_TREE; | |
| 828 | |
| 829 do | |
| 830 { | |
| 831 /* Build up the numbers/strings now as a list. */ | |
| 832 if (token != CPP_STRING || TREE_STRING_LENGTH (x) > 0) | |
| 833 args = tree_cons (NULL_TREE, x, args); | |
| 834 | |
| 835 token = pragma_lex (&x); | |
| 836 while (token == CPP_COMMA) | |
| 837 token = pragma_lex (&x); | |
| 838 } | |
| 839 while (token == CPP_STRING || token == CPP_NUMBER); | |
| 840 | |
| 841 if (close_paren_needed_p) | |
| 842 { | |
| 843 if (token == CPP_CLOSE_PAREN) | |
| 844 token = pragma_lex (&x); | |
| 845 else | |
| 846 GCC_BAD ("%<#pragma GCC optimize (string [,string]...)%> does " | |
| 847 "not have a final %<)%>."); | |
| 848 } | |
| 849 | |
| 850 if (token != CPP_EOF) | |
| 851 { | |
| 852 error ("#pragma GCC optimize string... is badly formed"); | |
| 853 return; | |
| 854 } | |
| 855 | |
| 856 /* put arguments in the order the user typed them. */ | |
| 857 args = nreverse (args); | |
| 858 | |
| 859 parse_optimize_options (args, false); | |
| 860 current_optimize_pragma = chainon (current_optimize_pragma, args); | |
| 861 optimization_current_node = build_optimization_node (); | |
| 862 c_cpp_builtins_optimize_pragma (parse_in, | |
| 863 optimization_previous_node, | |
| 864 optimization_current_node); | |
| 865 } | |
| 866 } | |
| 867 | |
| 868 /* Stack of the #pragma GCC options created with #pragma GCC push_option. Save | |
| 869 both the binary representation of the options and the TREE_LIST of | |
| 870 strings that will be added to the function's attribute list. */ | |
|
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871 typedef struct GTY(()) opt_stack { |
| 0 | 872 struct opt_stack *prev; |
| 873 tree target_binary; | |
| 874 tree target_strings; | |
| 875 tree optimize_binary; | |
| 876 tree optimize_strings; | |
| 877 } opt_stack; | |
| 878 | |
| 879 static GTY(()) struct opt_stack * options_stack; | |
| 880 | |
| 881 /* Handle #pragma GCC push_options to save the current target and optimization | |
| 882 options. */ | |
| 883 | |
| 884 static void | |
| 885 handle_pragma_push_options (cpp_reader *ARG_UNUSED(dummy)) | |
| 886 { | |
| 887 enum cpp_ttype token; | |
| 888 tree x = 0; | |
| 889 opt_stack *p; | |
| 890 | |
| 891 token = pragma_lex (&x); | |
| 892 if (token != CPP_EOF) | |
| 893 { | |
| 894 warning (OPT_Wpragmas, "junk at end of %<#pragma push_options%>"); | |
| 895 return; | |
| 896 } | |
| 897 | |
| 898 p = GGC_NEW (opt_stack); | |
| 899 p->prev = options_stack; | |
| 900 options_stack = p; | |
| 901 | |
| 902 /* Save optimization and target flags in binary format. */ | |
| 903 p->optimize_binary = build_optimization_node (); | |
| 904 p->target_binary = build_target_option_node (); | |
| 905 | |
| 906 /* Save optimization and target flags in string list format. */ | |
| 907 p->optimize_strings = copy_list (current_optimize_pragma); | |
| 908 p->target_strings = copy_list (current_target_pragma); | |
| 909 } | |
| 910 | |
| 911 /* Handle #pragma GCC pop_options to restore the current target and | |
| 912 optimization options from a previous push_options. */ | |
| 913 | |
| 914 static void | |
| 915 handle_pragma_pop_options (cpp_reader *ARG_UNUSED(dummy)) | |
| 916 { | |
| 917 enum cpp_ttype token; | |
| 918 tree x = 0; | |
| 919 opt_stack *p; | |
| 920 | |
| 921 token = pragma_lex (&x); | |
| 922 if (token != CPP_EOF) | |
| 923 { | |
| 924 warning (OPT_Wpragmas, "junk at end of %<#pragma pop_options%>"); | |
| 925 return; | |
| 926 } | |
| 927 | |
| 928 if (! options_stack) | |
| 929 { | |
| 930 warning (OPT_Wpragmas, | |
| 931 "%<#pragma GCC pop_options%> without a corresponding " | |
| 932 "%<#pragma GCC push_options%>"); | |
| 933 return; | |
| 934 } | |
| 935 | |
| 936 p = options_stack; | |
| 937 options_stack = p->prev; | |
| 938 | |
| 939 if (p->target_binary != target_option_current_node) | |
| 940 { | |
| 941 (void) targetm.target_option.pragma_parse (NULL_TREE, p->target_binary); | |
| 942 target_option_current_node = p->target_binary; | |
| 943 } | |
| 944 | |
| 945 if (p->optimize_binary != optimization_current_node) | |
| 946 { | |
| 947 tree old_optimize = optimization_current_node; | |
| 948 cl_optimization_restore (TREE_OPTIMIZATION (p->optimize_binary)); | |
| 949 c_cpp_builtins_optimize_pragma (parse_in, old_optimize, | |
| 950 p->optimize_binary); | |
| 951 optimization_current_node = p->optimize_binary; | |
| 952 } | |
| 953 | |
| 954 current_target_pragma = p->target_strings; | |
| 955 current_optimize_pragma = p->optimize_strings; | |
| 956 } | |
| 957 | |
| 958 /* Handle #pragma GCC reset_options to restore the current target and | |
| 959 optimization options to the original options used on the command line. */ | |
| 960 | |
| 961 static void | |
| 962 handle_pragma_reset_options (cpp_reader *ARG_UNUSED(dummy)) | |
| 963 { | |
| 964 enum cpp_ttype token; | |
| 965 tree x = 0; | |
| 966 tree new_optimize = optimization_default_node; | |
| 967 tree new_target = target_option_default_node; | |
| 968 | |
| 969 token = pragma_lex (&x); | |
| 970 if (token != CPP_EOF) | |
| 971 { | |
| 972 warning (OPT_Wpragmas, "junk at end of %<#pragma reset_options%>"); | |
| 973 return; | |
| 974 } | |
| 975 | |
| 976 if (new_target != target_option_current_node) | |
| 977 { | |
| 978 (void) targetm.target_option.pragma_parse (NULL_TREE, new_target); | |
| 979 target_option_current_node = new_target; | |
| 980 } | |
| 981 | |
| 982 if (new_optimize != optimization_current_node) | |
| 983 { | |
| 984 tree old_optimize = optimization_current_node; | |
| 985 cl_optimization_restore (TREE_OPTIMIZATION (new_optimize)); | |
| 986 c_cpp_builtins_optimize_pragma (parse_in, old_optimize, new_optimize); | |
| 987 optimization_current_node = new_optimize; | |
| 988 } | |
| 989 | |
| 990 current_target_pragma = NULL_TREE; | |
| 991 current_optimize_pragma = NULL_TREE; | |
| 992 } | |
| 993 | |
| 994 /* Print a plain user-specified message. */ | |
| 995 | |
| 996 static void | |
| 997 handle_pragma_message (cpp_reader *ARG_UNUSED(dummy)) | |
| 998 { | |
| 999 enum cpp_ttype token; | |
| 1000 tree x, message = 0; | |
| 1001 | |
| 1002 token = pragma_lex (&x); | |
| 1003 if (token == CPP_OPEN_PAREN) | |
| 1004 { | |
| 1005 token = pragma_lex (&x); | |
| 1006 if (token == CPP_STRING) | |
| 1007 message = x; | |
| 1008 else | |
| 1009 GCC_BAD ("expected a string after %<#pragma message%>"); | |
| 1010 if (pragma_lex (&x) != CPP_CLOSE_PAREN) | |
| 1011 GCC_BAD ("malformed %<#pragma message%>, ignored"); | |
| 1012 } | |
| 1013 else if (token == CPP_STRING) | |
| 1014 message = x; | |
| 1015 else | |
| 1016 GCC_BAD ("expected a string after %<#pragma message%>"); | |
| 1017 | |
| 1018 gcc_assert (message); | |
| 1019 | |
| 1020 if (pragma_lex (&x) != CPP_EOF) | |
| 1021 warning (OPT_Wpragmas, "junk at end of %<#pragma message%>"); | |
| 1022 | |
| 1023 if (TREE_STRING_LENGTH (message) > 1) | |
| 1024 inform (input_location, "#pragma message: %s", TREE_STRING_POINTER (message)); | |
| 1025 } | |
| 1026 | |
|
55
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update it from 4.4.3 to 4.5.0
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|
1027 /* Mark whether the current location is valid for a STDC pragma. */ |
|
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diff
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|
1028 |
|
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diff
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|
1029 static bool valid_location_for_stdc_pragma; |
|
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diff
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|
1030 |
|
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diff
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|
1031 void |
|
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update it from 4.4.3 to 4.5.0
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diff
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|
1032 mark_valid_location_for_stdc_pragma (bool flag) |
|
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|
1033 { |
|
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update it from 4.4.3 to 4.5.0
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diff
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|
1034 valid_location_for_stdc_pragma = flag; |
|
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|
1035 } |
|
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|
1036 |
|
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diff
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|
1037 /* Return true if the current location is valid for a STDC pragma. */ |
|
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|
1038 |
|
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|
1039 bool |
|
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|
1040 valid_location_for_stdc_pragma_p (void) |
|
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|
1041 { |
|
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|
1042 return valid_location_for_stdc_pragma; |
|
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|
1043 } |
|
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|
1044 |
|
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|
1045 enum pragma_switch_t { PRAGMA_ON, PRAGMA_OFF, PRAGMA_DEFAULT, PRAGMA_BAD }; |
|
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diff
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|
1046 |
|
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diff
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|
1047 /* A STDC pragma must appear outside of external declarations or |
|
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diff
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|
1048 preceding all explicit declarations and statements inside a compound |
|
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diff
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|
1049 statement; its behavior is undefined if used in any other context. |
|
77e2b8dfacca
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diff
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|
1050 It takes a switch of ON, OFF, or DEFAULT. */ |
|
77e2b8dfacca
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|
1051 |
|
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update it from 4.4.3 to 4.5.0
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47
diff
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|
1052 static enum pragma_switch_t |
|
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diff
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|
1053 handle_stdc_pragma (const char *pname) |
|
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|
1054 { |
|
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|
1055 const char *arg; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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|
1056 tree t; |
|
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update it from 4.4.3 to 4.5.0
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|
1057 enum pragma_switch_t ret; |
|
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diff
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|
1058 |
|
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update it from 4.4.3 to 4.5.0
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|
1059 if (!valid_location_for_stdc_pragma_p ()) |
|
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|
1060 { |
|
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|
1061 warning (OPT_Wpragmas, "invalid location for %<pragma %s%>, ignored", |
|
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|
1062 pname); |
|
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|
1063 return PRAGMA_BAD; |
|
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|
1064 } |
|
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|
1065 |
|
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|
1066 if (pragma_lex (&t) != CPP_NAME) |
|
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|
1067 { |
|
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|
1068 warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname); |
|
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|
1069 return PRAGMA_BAD; |
|
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1070 } |
|
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|
1071 |
|
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|
1072 arg = IDENTIFIER_POINTER (t); |
|
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|
1073 |
|
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|
1074 if (!strcmp (arg, "ON")) |
|
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|
1075 ret = PRAGMA_ON; |
|
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|
1076 else if (!strcmp (arg, "OFF")) |
|
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|
1077 ret = PRAGMA_OFF; |
|
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|
1078 else if (!strcmp (arg, "DEFAULT")) |
|
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|
1079 ret = PRAGMA_DEFAULT; |
|
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1080 else |
|
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|
1081 { |
|
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|
1082 warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname); |
|
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|
1083 return PRAGMA_BAD; |
|
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1084 } |
|
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|
1085 |
|
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|
1086 if (pragma_lex (&t) != CPP_EOF) |
|
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|
1087 { |
|
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|
1088 warning (OPT_Wpragmas, "junk at end of %<#pragma %s%>", pname); |
|
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|
1089 return PRAGMA_BAD; |
|
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1090 } |
|
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|
1091 |
|
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|
1092 return ret; |
|
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1093 } |
|
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|
1094 |
|
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|
1095 /* #pragma STDC FLOAT_CONST_DECIMAL64 ON |
|
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|
1096 #pragma STDC FLOAT_CONST_DECIMAL64 OFF |
|
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1097 #pragma STDC FLOAT_CONST_DECIMAL64 DEFAULT */ |
|
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1098 |
|
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|
1099 static void |
|
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1100 handle_pragma_float_const_decimal64 (cpp_reader *ARG_UNUSED (dummy)) |
|
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1101 { |
|
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1102 if (c_dialect_cxx ()) |
|
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1103 { |
|
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1104 if (warn_unknown_pragmas > in_system_header) |
|
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1105 warning (OPT_Wunknown_pragmas, |
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1106 "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported" |
|
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1107 " for C++"); |
|
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1108 return; |
|
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1109 } |
|
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1110 |
|
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1111 if (!targetm.decimal_float_supported_p ()) |
|
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1112 { |
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1113 if (warn_unknown_pragmas > in_system_header) |
|
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|
1114 warning (OPT_Wunknown_pragmas, |
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1115 "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported" |
|
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1116 " on this target"); |
|
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1117 return; |
|
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1118 } |
|
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1119 |
|
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1120 pedwarn (input_location, OPT_pedantic, |
|
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1121 "ISO C does not support %<#pragma STDC FLOAT_CONST_DECIMAL64%>"); |
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1122 |
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1123 switch (handle_stdc_pragma ("STDC FLOAT_CONST_DECIMAL64")) |
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1124 { |
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1125 case PRAGMA_ON: |
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1126 set_float_const_decimal64 (); |
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1127 break; |
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1128 case PRAGMA_OFF: |
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1129 case PRAGMA_DEFAULT: |
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1130 clear_float_const_decimal64 (); |
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1131 break; |
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1132 case PRAGMA_BAD: |
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1133 break; |
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1134 } |
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1135 } |
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1136 |
| 0 | 1137 /* A vector of registered pragma callbacks. */ |
| 1138 | |
| 1139 DEF_VEC_O (pragma_handler); | |
| 1140 DEF_VEC_ALLOC_O (pragma_handler, heap); | |
| 1141 | |
| 1142 static VEC(pragma_handler, heap) *registered_pragmas; | |
| 1143 | |
| 1144 typedef struct | |
| 1145 { | |
| 1146 const char *space; | |
| 1147 const char *name; | |
| 1148 } pragma_ns_name; | |
| 1149 | |
| 1150 DEF_VEC_O (pragma_ns_name); | |
| 1151 DEF_VEC_ALLOC_O (pragma_ns_name, heap); | |
| 1152 | |
| 1153 static VEC(pragma_ns_name, heap) *registered_pp_pragmas; | |
| 1154 | |
| 1155 struct omp_pragma_def { const char *name; unsigned int id; }; | |
| 1156 static const struct omp_pragma_def omp_pragmas[] = { | |
| 1157 { "atomic", PRAGMA_OMP_ATOMIC }, | |
| 1158 { "barrier", PRAGMA_OMP_BARRIER }, | |
| 1159 { "critical", PRAGMA_OMP_CRITICAL }, | |
| 1160 { "flush", PRAGMA_OMP_FLUSH }, | |
| 1161 { "for", PRAGMA_OMP_FOR }, | |
| 1162 { "master", PRAGMA_OMP_MASTER }, | |
| 1163 { "ordered", PRAGMA_OMP_ORDERED }, | |
| 1164 { "parallel", PRAGMA_OMP_PARALLEL }, | |
| 1165 { "section", PRAGMA_OMP_SECTION }, | |
| 1166 { "sections", PRAGMA_OMP_SECTIONS }, | |
| 1167 { "single", PRAGMA_OMP_SINGLE }, | |
| 1168 { "task", PRAGMA_OMP_TASK }, | |
| 1169 { "taskwait", PRAGMA_OMP_TASKWAIT }, | |
| 1170 { "threadprivate", PRAGMA_OMP_THREADPRIVATE } | |
| 1171 }; | |
| 1172 | |
| 1173 void | |
| 1174 c_pp_lookup_pragma (unsigned int id, const char **space, const char **name) | |
| 1175 { | |
| 1176 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas); | |
| 1177 int i; | |
| 1178 | |
| 1179 for (i = 0; i < n_omp_pragmas; ++i) | |
| 1180 if (omp_pragmas[i].id == id) | |
| 1181 { | |
| 1182 *space = "omp"; | |
| 1183 *name = omp_pragmas[i].name; | |
| 1184 return; | |
| 1185 } | |
| 1186 | |
| 1187 if (id >= PRAGMA_FIRST_EXTERNAL | |
| 1188 && (id < PRAGMA_FIRST_EXTERNAL | |
| 1189 + VEC_length (pragma_ns_name, registered_pp_pragmas))) | |
| 1190 { | |
| 1191 *space = VEC_index (pragma_ns_name, registered_pp_pragmas, | |
| 1192 id - PRAGMA_FIRST_EXTERNAL)->space; | |
| 1193 *name = VEC_index (pragma_ns_name, registered_pp_pragmas, | |
| 1194 id - PRAGMA_FIRST_EXTERNAL)->name; | |
| 1195 return; | |
| 1196 } | |
| 1197 | |
| 1198 gcc_unreachable (); | |
| 1199 } | |
| 1200 | |
| 1201 /* Front-end wrappers for pragma registration to avoid dragging | |
| 1202 cpplib.h in almost everywhere. */ | |
| 1203 | |
| 1204 static void | |
| 1205 c_register_pragma_1 (const char *space, const char *name, | |
| 1206 pragma_handler handler, bool allow_expansion) | |
| 1207 { | |
| 1208 unsigned id; | |
| 1209 | |
| 1210 if (flag_preprocess_only) | |
| 1211 { | |
| 1212 pragma_ns_name ns_name; | |
| 1213 | |
| 1214 if (!allow_expansion) | |
| 1215 return; | |
| 1216 | |
| 1217 ns_name.space = space; | |
| 1218 ns_name.name = name; | |
| 1219 VEC_safe_push (pragma_ns_name, heap, registered_pp_pragmas, &ns_name); | |
| 1220 id = VEC_length (pragma_ns_name, registered_pp_pragmas); | |
| 1221 id += PRAGMA_FIRST_EXTERNAL - 1; | |
| 1222 } | |
| 1223 else | |
| 1224 { | |
| 1225 VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler); | |
| 1226 id = VEC_length (pragma_handler, registered_pragmas); | |
| 1227 id += PRAGMA_FIRST_EXTERNAL - 1; | |
| 1228 | |
| 1229 /* The C++ front end allocates 6 bits in cp_token; the C front end | |
| 1230 allocates 7 bits in c_token. At present this is sufficient. */ | |
| 1231 gcc_assert (id < 64); | |
| 1232 } | |
| 1233 | |
| 1234 cpp_register_deferred_pragma (parse_in, space, name, id, | |
| 1235 allow_expansion, false); | |
| 1236 } | |
| 1237 | |
| 1238 void | |
| 1239 c_register_pragma (const char *space, const char *name, pragma_handler handler) | |
| 1240 { | |
| 1241 c_register_pragma_1 (space, name, handler, false); | |
| 1242 } | |
| 1243 | |
| 1244 void | |
| 1245 c_register_pragma_with_expansion (const char *space, const char *name, | |
| 1246 pragma_handler handler) | |
| 1247 { | |
| 1248 c_register_pragma_1 (space, name, handler, true); | |
| 1249 } | |
| 1250 | |
| 1251 void | |
| 1252 c_invoke_pragma_handler (unsigned int id) | |
| 1253 { | |
| 1254 pragma_handler handler; | |
| 1255 | |
| 1256 id -= PRAGMA_FIRST_EXTERNAL; | |
| 1257 handler = *VEC_index (pragma_handler, registered_pragmas, id); | |
| 1258 | |
| 1259 handler (parse_in); | |
| 1260 } | |
| 1261 | |
| 1262 /* Set up front-end pragmas. */ | |
| 1263 void | |
| 1264 init_pragma (void) | |
| 1265 { | |
| 1266 if (flag_openmp) | |
| 1267 { | |
| 1268 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas); | |
| 1269 int i; | |
| 1270 | |
| 1271 for (i = 0; i < n_omp_pragmas; ++i) | |
| 1272 cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name, | |
| 1273 omp_pragmas[i].id, true, true); | |
| 1274 } | |
| 1275 | |
| 1276 if (!flag_preprocess_only) | |
| 1277 cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess", | |
| 1278 PRAGMA_GCC_PCH_PREPROCESS, false, false); | |
| 1279 | |
| 1280 #ifdef HANDLE_PRAGMA_PACK | |
| 1281 #ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION | |
| 1282 c_register_pragma_with_expansion (0, "pack", handle_pragma_pack); | |
| 1283 #else | |
| 1284 c_register_pragma (0, "pack", handle_pragma_pack); | |
| 1285 #endif | |
| 1286 #endif | |
| 1287 #ifdef HANDLE_PRAGMA_WEAK | |
| 1288 c_register_pragma (0, "weak", handle_pragma_weak); | |
| 1289 #endif | |
| 1290 #ifdef HANDLE_PRAGMA_VISIBILITY | |
| 1291 c_register_pragma ("GCC", "visibility", handle_pragma_visibility); | |
| 1292 #endif | |
| 1293 | |
| 1294 c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic); | |
| 1295 c_register_pragma ("GCC", "target", handle_pragma_target); | |
| 1296 c_register_pragma ("GCC", "optimize", handle_pragma_optimize); | |
| 1297 c_register_pragma ("GCC", "push_options", handle_pragma_push_options); | |
| 1298 c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options); | |
| 1299 c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options); | |
| 1300 | |
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1301 c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64", |
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1302 handle_pragma_float_const_decimal64); |
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1303 |
| 0 | 1304 c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname); |
| 1305 c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix); | |
| 1306 | |
| 1307 c_register_pragma_with_expansion (0, "message", handle_pragma_message); | |
| 1308 | |
| 1309 #ifdef REGISTER_TARGET_PRAGMAS | |
| 1310 REGISTER_TARGET_PRAGMAS (); | |
| 1311 #endif | |
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1312 |
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1313 /* Allow plugins to register their own pragmas. */ |
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1314 invoke_plugin_callbacks (PLUGIN_PRAGMAS, NULL); |
| 0 | 1315 } |
| 1316 | |
| 1317 #include "gt-c-pragma.h" |