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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [c-pragma.c] - Blame information for rev 280

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1 280 jeremybenn
/* 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"
40
#include "plugin.h"
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
 
47
typedef struct GTY(()) align_stack {
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
 
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, "\
116
#pragma pack(pop, %E) encountered without matching #pragma pack(push, %E)"
117
                 , id, id);
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
183
        GCC_BAD2 ("unknown action %qE for %<#pragma pack%> - ignored", x);
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
 
321
      decl = build_decl (UNKNOWN_LOCATION,
322
                         FUNCTION_DECL, alias_id, default_function_type);
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
 
589
static VEC (int, heap) *visstack;
590
 
591
/* Push the visibility indicated by STR onto the top of the #pragma
592
   visibility stack.  KIND is 0 for #pragma GCC visibility, 1 for
593
   C++ namespace with visibility attribute and 2 for C++ builtin
594
   ABI namespace.  push_visibility/pop_visibility calls must have
595
   matching KIND, it is not allowed to push visibility using one
596
   KIND and pop using a different one.  */
597
 
598
void
599
push_visibility (const char *str, int kind)
600
{
601
  VEC_safe_push (int, heap, visstack,
602
                 ((int) default_visibility) | (kind << 8));
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
 
616
/* Pop a level of the #pragma visibility stack.  Return true if
617
   successful.  */
618
 
619
bool
620
pop_visibility (int kind)
621
{
622
  if (!VEC_length (int, visstack))
623
    return false;
624
  if ((VEC_last (int, visstack) >> 8) != kind)
625
    return false;
626
  default_visibility
627
    = (enum symbol_visibility) (VEC_pop (int, visstack) & 0xff);
628
  visibility_options.inpragma
629
    = VEC_length (int, visstack) != 0;
630
  return true;
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
        {
659
          if (! pop_visibility (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
670
            push_visibility (IDENTIFIER_POINTER (x), 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.  */
871
typedef struct GTY(()) opt_stack {
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
 
1027
/* Mark whether the current location is valid for a STDC pragma.  */
1028
 
1029
static bool valid_location_for_stdc_pragma;
1030
 
1031
void
1032
mark_valid_location_for_stdc_pragma (bool flag)
1033
{
1034
  valid_location_for_stdc_pragma = flag;
1035
}
1036
 
1037
/* Return true if the current location is valid for a STDC pragma.  */
1038
 
1039
bool
1040
valid_location_for_stdc_pragma_p (void)
1041
{
1042
  return valid_location_for_stdc_pragma;
1043
}
1044
 
1045
enum pragma_switch_t { PRAGMA_ON, PRAGMA_OFF, PRAGMA_DEFAULT, PRAGMA_BAD };
1046
 
1047
/* A STDC pragma must appear outside of external declarations or
1048
   preceding all explicit declarations and statements inside a compound
1049
   statement; its behavior is undefined if used in any other context.
1050
   It takes a switch of ON, OFF, or DEFAULT.  */
1051
 
1052
static enum pragma_switch_t
1053
handle_stdc_pragma (const char *pname)
1054
{
1055
  const char *arg;
1056
  tree t;
1057
  enum pragma_switch_t ret;
1058
 
1059
  if (!valid_location_for_stdc_pragma_p ())
1060
    {
1061
      warning (OPT_Wpragmas, "invalid location for %<pragma %s%>, ignored",
1062
               pname);
1063
      return PRAGMA_BAD;
1064
    }
1065
 
1066
  if (pragma_lex (&t) != CPP_NAME)
1067
    {
1068
      warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname);
1069
      return PRAGMA_BAD;
1070
    }
1071
 
1072
  arg = IDENTIFIER_POINTER (t);
1073
 
1074
  if (!strcmp (arg, "ON"))
1075
    ret = PRAGMA_ON;
1076
  else if (!strcmp (arg, "OFF"))
1077
    ret = PRAGMA_OFF;
1078
  else if (!strcmp (arg, "DEFAULT"))
1079
    ret = PRAGMA_DEFAULT;
1080
  else
1081
    {
1082
      warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname);
1083
      return PRAGMA_BAD;
1084
    }
1085
 
1086
  if (pragma_lex (&t) != CPP_EOF)
1087
    {
1088
      warning (OPT_Wpragmas, "junk at end of %<#pragma %s%>", pname);
1089
      return PRAGMA_BAD;
1090
    }
1091
 
1092
  return ret;
1093
}
1094
 
1095
/* #pragma STDC FLOAT_CONST_DECIMAL64 ON
1096
   #pragma STDC FLOAT_CONST_DECIMAL64 OFF
1097
   #pragma STDC FLOAT_CONST_DECIMAL64 DEFAULT */
1098
 
1099
static void
1100
handle_pragma_float_const_decimal64 (cpp_reader *ARG_UNUSED (dummy))
1101
{
1102
  if (c_dialect_cxx ())
1103
    {
1104
      if (warn_unknown_pragmas > in_system_header)
1105
        warning (OPT_Wunknown_pragmas,
1106
                 "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported"
1107
                 " for C++");
1108
      return;
1109
    }
1110
 
1111
  if (!targetm.decimal_float_supported_p ())
1112
    {
1113
      if (warn_unknown_pragmas > in_system_header)
1114
        warning (OPT_Wunknown_pragmas,
1115
                 "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported"
1116
                 " on this target");
1117
      return;
1118
    }
1119
 
1120
  pedwarn (input_location, OPT_pedantic,
1121
           "ISO C does not support %<#pragma STDC FLOAT_CONST_DECIMAL64%>");
1122
 
1123
  switch (handle_stdc_pragma ("STDC FLOAT_CONST_DECIMAL64"))
1124
    {
1125
    case PRAGMA_ON:
1126
      set_float_const_decimal64 ();
1127
      break;
1128
    case PRAGMA_OFF:
1129
    case PRAGMA_DEFAULT:
1130
      clear_float_const_decimal64 ();
1131
      break;
1132
    case PRAGMA_BAD:
1133
      break;
1134
    }
1135
}
1136
 
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
 
1301
  c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64",
1302
                     handle_pragma_float_const_decimal64);
1303
 
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
1312
 
1313
  /* Allow plugins to register their own pragmas. */
1314
  invoke_plugin_callbacks (PLUGIN_PRAGMAS, NULL);
1315
}
1316
 
1317
#include "gt-c-pragma.h"

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