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a187ac95 | 1 | /* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack. |
23a5b65a | 2 | Copyright (C) 1992-2014 Free Software Foundation, Inc. |
a187ac95 | 3 | |
1322177d | 4 | This file is part of GCC. |
a187ac95 | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
a187ac95 | 10 | |
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
a187ac95 RS |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
a187ac95 | 19 | |
4b578ebf | 20 | #include "config.h" |
670ee920 | 21 | #include "system.h" |
4977bab6 ZW |
22 | #include "coretypes.h" |
23 | #include "tm.h" | |
4b578ebf | 24 | #include "tree.h" |
d8a2d370 DN |
25 | #include "stringpool.h" |
26 | #include "attribs.h" | |
27 | #include "varasm.h" | |
83685514 AM |
28 | #include "hashtab.h" |
29 | #include "hash-set.h" | |
30 | #include "vec.h" | |
31 | #include "machmode.h" | |
32 | #include "hard-reg-set.h" | |
33 | #include "input.h" | |
f4ce02c5 SB |
34 | #include "function.h" /* For cfun. FIXME: Does the parser know |
35 | when it is inside a function, so that | |
36 | we don't have to look at cfun? */ | |
8b97c5f8 | 37 | #include "cpplib.h" |
3d6f7931 | 38 | #include "c-pragma.h" |
750caf0d | 39 | #include "flags.h" |
ecb0eece | 40 | #include "c-common.h" |
f4ce02c5 SB |
41 | #include "tm_p.h" /* For REGISTER_TARGET_PRAGMAS (why is |
42 | this not a target hook?). */ | |
84b8b0e0 | 43 | #include "target.h" |
79cf5994 DD |
44 | #include "diagnostic.h" |
45 | #include "opts.h" | |
7ac8318c | 46 | #include "plugin.h" |
c582198b AM |
47 | #include "hash-map.h" |
48 | #include "is-a.h" | |
49 | #include "plugin-api.h" | |
50 | #include "ipa-ref.h" | |
65d630d4 | 51 | #include "cgraph.h" |
bc4071dd | 52 | |
b9b8dde3 DD |
53 | #define GCC_BAD(gmsgid) \ |
54 | do { warning (OPT_Wpragmas, gmsgid); return; } while (0) | |
4b794eaf | 55 | #define GCC_BAD2(gmsgid, arg) \ |
b9b8dde3 | 56 | do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0) |
0e5921e8 | 57 | |
d1b38208 | 58 | typedef struct GTY(()) align_stack { |
c22cacf3 MS |
59 | int alignment; |
60 | tree id; | |
e2af664c NC |
61 | struct align_stack * prev; |
62 | } align_stack; | |
63 | ||
e2500fed GK |
64 | static GTY(()) struct align_stack * alignment_stack; |
65 | ||
35b1a6fa | 66 | static void handle_pragma_pack (cpp_reader *); |
e2af664c | 67 | |
63eb1269 | 68 | /* If we have a "global" #pragma pack(<n>) in effect when the first |
c22cacf3 MS |
69 | #pragma pack(push,<n>) is encountered, this stores the value of |
70 | maximum_field_alignment in effect. When the final pop_alignment() | |
61e8b354 | 71 | happens, we restore the value to this, not to a value of 0 for |
ec5c56db | 72 | maximum_field_alignment. Value is in bits. */ |
ecb0eece | 73 | static int default_alignment; |
467cecf3 JB |
74 | #define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \ |
75 | ? &default_alignment \ | |
76 | : &alignment_stack->alignment) = (ALIGN)) | |
61e8b354 | 77 | |
35b1a6fa AJ |
78 | static void push_alignment (int, tree); |
79 | static void pop_alignment (tree); | |
e2af664c NC |
80 | |
81 | /* Push an alignment value onto the stack. */ | |
0e5921e8 | 82 | static void |
35b1a6fa | 83 | push_alignment (int alignment, tree id) |
e2af664c | 84 | { |
766090c2 | 85 | align_stack * entry = ggc_alloc<align_stack> (); |
e2af664c | 86 | |
467cecf3 | 87 | entry->alignment = alignment; |
c22cacf3 MS |
88 | entry->id = id; |
89 | entry->prev = alignment_stack; | |
90 | ||
91 | /* The current value of maximum_field_alignment is not necessarily | |
92 | 0 since there may be a #pragma pack(<n>) in effect; remember it | |
467cecf3 JB |
93 | so that we can restore it after the final #pragma pop(). */ |
94 | if (alignment_stack == NULL) | |
95 | default_alignment = maximum_field_alignment; | |
c22cacf3 | 96 | |
467cecf3 | 97 | alignment_stack = entry; |
e2af664c | 98 | |
467cecf3 | 99 | maximum_field_alignment = alignment; |
e2af664c NC |
100 | } |
101 | ||
102 | /* Undo a push of an alignment onto the stack. */ | |
0e5921e8 | 103 | static void |
35b1a6fa | 104 | pop_alignment (tree id) |
e2af664c | 105 | { |
0f92adae | 106 | align_stack * entry; |
c22cacf3 | 107 | |
e2af664c | 108 | if (alignment_stack == NULL) |
3f75a254 | 109 | GCC_BAD ("#pragma pack (pop) encountered without matching #pragma pack (push)"); |
e2af664c | 110 | |
0f92adae JM |
111 | /* If we got an identifier, strip away everything above the target |
112 | entry so that the next step will restore the state just below it. */ | |
113 | if (id) | |
114 | { | |
115 | for (entry = alignment_stack; entry; entry = entry->prev) | |
116 | if (entry->id == id) | |
117 | { | |
0f92adae JM |
118 | alignment_stack = entry; |
119 | break; | |
120 | } | |
121 | if (entry == NULL) | |
b9b8dde3 | 122 | warning (OPT_Wpragmas, "\ |
88388a52 JM |
123 | #pragma pack(pop, %E) encountered without matching #pragma pack(push, %E)" |
124 | , id, id); | |
0f92adae JM |
125 | } |
126 | ||
467cecf3 | 127 | entry = alignment_stack->prev; |
e2af664c | 128 | |
467cecf3 | 129 | maximum_field_alignment = entry ? entry->alignment : default_alignment; |
e2af664c | 130 | |
467cecf3 | 131 | alignment_stack = entry; |
e2af664c | 132 | } |
a187ac95 | 133 | |
0e5921e8 ZW |
134 | /* #pragma pack () |
135 | #pragma pack (N) | |
c22cacf3 | 136 | |
467cecf3 | 137 | #pragma pack (push) |
0e5921e8 | 138 | #pragma pack (push, N) |
467cecf3 | 139 | #pragma pack (push, ID) |
0e5921e8 ZW |
140 | #pragma pack (push, ID, N) |
141 | #pragma pack (pop) | |
142 | #pragma pack (pop, ID) */ | |
143 | static void | |
e18476eb | 144 | handle_pragma_pack (cpp_reader * ARG_UNUSED (dummy)) |
0e5921e8 ZW |
145 | { |
146 | tree x, id = 0; | |
63eb1269 | 147 | int align = -1; |
0e5921e8 | 148 | enum cpp_ttype token; |
4337bc93 | 149 | enum { set, push, pop } action; |
0e5921e8 | 150 | |
75ce3d48 | 151 | if (pragma_lex (&x) != CPP_OPEN_PAREN) |
bda67431 | 152 | GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored"); |
0e5921e8 | 153 | |
75ce3d48 | 154 | token = pragma_lex (&x); |
0e5921e8 | 155 | if (token == CPP_CLOSE_PAREN) |
4337bc93 ZW |
156 | { |
157 | action = set; | |
467cecf3 | 158 | align = initial_max_fld_align; |
4337bc93 | 159 | } |
0e5921e8 ZW |
160 | else if (token == CPP_NUMBER) |
161 | { | |
12050e44 VR |
162 | if (TREE_CODE (x) != INTEGER_CST) |
163 | GCC_BAD ("invalid constant in %<#pragma pack%> - ignored"); | |
0e5921e8 ZW |
164 | align = TREE_INT_CST_LOW (x); |
165 | action = set; | |
75ce3d48 | 166 | if (pragma_lex (&x) != CPP_CLOSE_PAREN) |
bda67431 | 167 | GCC_BAD ("malformed %<#pragma pack%> - ignored"); |
0e5921e8 ZW |
168 | } |
169 | else if (token == CPP_NAME) | |
170 | { | |
467cecf3 | 171 | #define GCC_BAD_ACTION do { if (action != pop) \ |
bda67431 | 172 | GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \ |
63eb1269 | 173 | else \ |
bda67431 | 174 | GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \ |
63eb1269 MC |
175 | } while (0) |
176 | ||
4337bc93 ZW |
177 | const char *op = IDENTIFIER_POINTER (x); |
178 | if (!strcmp (op, "push")) | |
0e5921e8 | 179 | action = push; |
4337bc93 | 180 | else if (!strcmp (op, "pop")) |
0e5921e8 ZW |
181 | action = pop; |
182 | else | |
88388a52 | 183 | GCC_BAD2 ("unknown action %qE for %<#pragma pack%> - ignored", x); |
a187ac95 | 184 | |
75ce3d48 | 185 | while ((token = pragma_lex (&x)) == CPP_COMMA) |
e2af664c | 186 | { |
75ce3d48 | 187 | token = pragma_lex (&x); |
467cecf3 | 188 | if (token == CPP_NAME && id == 0) |
63eb1269 MC |
189 | { |
190 | id = x; | |
63eb1269 | 191 | } |
467cecf3 | 192 | else if (token == CPP_NUMBER && action == push && align == -1) |
63eb1269 | 193 | { |
12050e44 VR |
194 | if (TREE_CODE (x) != INTEGER_CST) |
195 | GCC_BAD ("invalid constant in %<#pragma pack%> - ignored"); | |
467cecf3 JB |
196 | align = TREE_INT_CST_LOW (x); |
197 | if (align == -1) | |
198 | action = set; | |
63eb1269 | 199 | } |
467cecf3 JB |
200 | else |
201 | GCC_BAD_ACTION; | |
e2af664c | 202 | } |
4337bc93 | 203 | |
63eb1269 | 204 | if (token != CPP_CLOSE_PAREN) |
da4083c7 CR |
205 | GCC_BAD_ACTION; |
206 | #undef GCC_BAD_ACTION | |
e2af664c | 207 | } |
4337bc93 | 208 | else |
bda67431 | 209 | GCC_BAD ("malformed %<#pragma pack%> - ignored"); |
4337bc93 | 210 | |
75ce3d48 | 211 | if (pragma_lex (&x) != CPP_EOF) |
b9b8dde3 | 212 | warning (OPT_Wpragmas, "junk at end of %<#pragma pack%>"); |
0e5921e8 | 213 | |
467cecf3 JB |
214 | if (flag_pack_struct) |
215 | GCC_BAD ("#pragma pack has no effect with -fpack-struct - ignored"); | |
216 | ||
63eb1269 MC |
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; | |
467cecf3 JB |
228 | case -1: |
229 | if (action == push) | |
230 | { | |
231 | align = maximum_field_alignment; | |
232 | break; | |
233 | } | |
63eb1269 | 234 | default: |
da4083c7 | 235 | GCC_BAD2 ("alignment must be a small power of two, not %d", align); |
63eb1269 | 236 | } |
fc009f96 | 237 | |
0e5921e8 ZW |
238 | switch (action) |
239 | { | |
240 | case set: SET_GLOBAL_ALIGNMENT (align); break; | |
0e5921e8 | 241 | case push: push_alignment (align, id); break; |
c22cacf3 | 242 | case pop: pop_alignment (id); break; |
0e5921e8 ZW |
243 | } |
244 | } | |
a187ac95 | 245 | |
18bc5398 SB |
246 | typedef struct GTY(()) pending_weak_d |
247 | { | |
248 | tree name; | |
249 | tree value; | |
250 | } pending_weak; | |
251 | ||
18bc5398 | 252 | |
9771b263 | 253 | static GTY(()) vec<pending_weak, va_gc> *pending_weaks; |
e2500fed | 254 | |
35b1a6fa AJ |
255 | static void apply_pragma_weak (tree, tree); |
256 | static void handle_pragma_weak (cpp_reader *); | |
a187ac95 | 257 | |
ecb0eece | 258 | static void |
35b1a6fa | 259 | apply_pragma_weak (tree decl, tree value) |
ecb0eece RH |
260 | { |
261 | if (value) | |
b53bb376 RH |
262 | { |
263 | value = build_string (IDENTIFIER_LENGTH (value), | |
264 | IDENTIFIER_POINTER (value)); | |
265 | decl_attributes (&decl, build_tree_list (get_identifier ("alias"), | |
266 | build_tree_list (NULL, value)), | |
267 | 0); | |
268 | } | |
269 | ||
45806a3f | 270 | if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl) |
e0a21ab9 | 271 | && !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */ |
39a1ebb3 | 272 | && DECL_ASSEMBLER_NAME_SET_P (decl) |
45806a3f | 273 | && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) |
b9b8dde3 | 274 | warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use " |
c22cacf3 | 275 | "results in unspecified behavior", decl); |
45806a3f | 276 | |
ecb0eece RH |
277 | declare_weak (decl); |
278 | } | |
279 | ||
280 | void | |
35b1a6fa | 281 | maybe_apply_pragma_weak (tree decl) |
ecb0eece | 282 | { |
18bc5398 SB |
283 | tree id; |
284 | int i; | |
285 | pending_weak *pe; | |
ecb0eece | 286 | |
49a64b24 GK |
287 | /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */ |
288 | ||
289 | /* No weak symbols pending, take the short-cut. */ | |
39a1ebb3 | 290 | if (vec_safe_is_empty (pending_weaks)) |
49a64b24 GK |
291 | return; |
292 | /* If it's not visible outside this file, it doesn't matter whether | |
293 | it's weak. */ | |
294 | if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl)) | |
ecb0eece | 295 | return; |
49a64b24 GK |
296 | /* If it's not a function or a variable, it can't be weak. |
297 | FIXME: what kinds of things are visible outside this file but | |
366de0ce | 298 | aren't functions or variables? Should this be an assert instead? */ |
49a64b24 GK |
299 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
300 | return; | |
301 | ||
39a1ebb3 JJ |
302 | if (DECL_ASSEMBLER_NAME_SET_P (decl)) |
303 | id = DECL_ASSEMBLER_NAME (decl); | |
304 | else | |
305 | { | |
306 | id = DECL_ASSEMBLER_NAME (decl); | |
307 | SET_DECL_ASSEMBLER_NAME (decl, NULL_TREE); | |
308 | } | |
ecb0eece | 309 | |
9771b263 | 310 | FOR_EACH_VEC_ELT (*pending_weaks, i, pe) |
18bc5398 | 311 | if (id == pe->name) |
ecb0eece | 312 | { |
18bc5398 | 313 | apply_pragma_weak (decl, pe->value); |
9771b263 | 314 | pending_weaks->unordered_remove (i); |
ecb0eece RH |
315 | break; |
316 | } | |
317 | } | |
318 | ||
86f029aa JM |
319 | /* Process all "#pragma weak A = B" directives where we have not seen |
320 | a decl for A. */ | |
321 | void | |
322 | maybe_apply_pending_pragma_weaks (void) | |
323 | { | |
18bc5398 SB |
324 | tree alias_id, id, decl; |
325 | int i; | |
326 | pending_weak *pe; | |
5e20cdc9 | 327 | symtab_node *target; |
86f029aa | 328 | |
39a1ebb3 | 329 | if (vec_safe_is_empty (pending_weaks)) |
9771b263 DN |
330 | return; |
331 | ||
332 | FOR_EACH_VEC_ELT (*pending_weaks, i, pe) | |
86f029aa | 333 | { |
18bc5398 SB |
334 | alias_id = pe->name; |
335 | id = pe->value; | |
86f029aa | 336 | |
18bc5398 | 337 | if (id == NULL) |
86f029aa JM |
338 | continue; |
339 | ||
3dafb85c | 340 | target = symtab_node::get_for_asmname (id); |
c2255bc4 | 341 | decl = build_decl (UNKNOWN_LOCATION, |
67348ccc | 342 | target ? TREE_CODE (target->decl) : FUNCTION_DECL, |
65d630d4 | 343 | alias_id, default_function_type); |
86f029aa JM |
344 | |
345 | DECL_ARTIFICIAL (decl) = 1; | |
346 | TREE_PUBLIC (decl) = 1; | |
86f029aa | 347 | DECL_WEAK (decl) = 1; |
65d630d4 JH |
348 | if (TREE_CODE (decl) == VAR_DECL) |
349 | TREE_STATIC (decl) = 1; | |
350 | if (!target) | |
351 | { | |
352 | error ("%q+D aliased to undefined symbol %qE", | |
353 | decl, id); | |
354 | continue; | |
355 | } | |
86f029aa JM |
356 | |
357 | assemble_alias (decl, id); | |
358 | } | |
359 | } | |
360 | ||
0e5921e8 ZW |
361 | /* #pragma weak name [= value] */ |
362 | static void | |
e18476eb | 363 | handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy)) |
0e5921e8 | 364 | { |
ecb0eece | 365 | tree name, value, x, decl; |
0e5921e8 | 366 | enum cpp_ttype t; |
a187ac95 | 367 | |
0e5921e8 | 368 | value = 0; |
7169a029 | 369 | |
75ce3d48 | 370 | if (pragma_lex (&name) != CPP_NAME) |
da4083c7 | 371 | GCC_BAD ("malformed #pragma weak, ignored"); |
75ce3d48 | 372 | t = pragma_lex (&x); |
0e5921e8 ZW |
373 | if (t == CPP_EQ) |
374 | { | |
75ce3d48 | 375 | if (pragma_lex (&value) != CPP_NAME) |
da4083c7 | 376 | GCC_BAD ("malformed #pragma weak, ignored"); |
75ce3d48 | 377 | t = pragma_lex (&x); |
0e5921e8 ZW |
378 | } |
379 | if (t != CPP_EOF) | |
bc4071dd | 380 | warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>"); |
0f92adae | 381 | |
ecb0eece | 382 | decl = identifier_global_value (name); |
6615c446 | 383 | if (decl && DECL_P (decl)) |
b53bb376 RH |
384 | { |
385 | apply_pragma_weak (decl, value); | |
386 | if (value) | |
08346abd JH |
387 | { |
388 | DECL_EXTERNAL (decl) = 0; | |
389 | if (TREE_CODE (decl) == VAR_DECL) | |
390 | TREE_STATIC (decl) = 1; | |
391 | assemble_alias (decl, value); | |
392 | } | |
b53bb376 | 393 | } |
ecb0eece | 394 | else |
18bc5398 | 395 | { |
f32682ca | 396 | pending_weak pe = {name, value}; |
9771b263 | 397 | vec_safe_push (pending_weaks, pe); |
18bc5398 | 398 | } |
0e5921e8 | 399 | } |
0f92adae | 400 | |
84b8b0e0 ZW |
401 | /* GCC supports two #pragma directives for renaming the external |
402 | symbol associated with a declaration (DECL_ASSEMBLER_NAME), for | |
5c30094f | 403 | compatibility with the Solaris and VMS system headers. GCC also |
84b8b0e0 ZW |
404 | has its own notation for this, __asm__("name") annotations. |
405 | ||
406 | Corner cases of these features and their interaction: | |
407 | ||
408 | 1) Both pragmas silently apply only to declarations with external | |
409 | linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels | |
410 | do not have this restriction. | |
411 | ||
412 | 2) In C++, both #pragmas silently apply only to extern "C" declarations. | |
413 | Asm labels do not have this restriction. | |
414 | ||
415 | 3) If any of the three ways of changing DECL_ASSEMBLER_NAME is | |
416 | applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the | |
417 | new name is different, a warning issues and the name does not change. | |
418 | ||
419 | 4) The "source name" for #pragma redefine_extname is the DECL_NAME, | |
420 | *not* the DECL_ASSEMBLER_NAME. | |
421 | ||
422 | 5) If #pragma extern_prefix is in effect and a declaration occurs | |
423 | with an __asm__ name, the #pragma extern_prefix is silently | |
424 | ignored for that declaration. | |
425 | ||
426 | 6) If #pragma extern_prefix and #pragma redefine_extname apply to | |
427 | the same declaration, whichever triggered first wins, and a warning | |
428 | is issued. (We would like to have #pragma redefine_extname always | |
429 | win, but it can appear either before or after the declaration, and | |
430 | if it appears afterward, we have no way of knowing whether a modified | |
431 | DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */ | |
432 | ||
4f8c876d NF |
433 | typedef struct GTY(()) pending_redefinition_d { |
434 | tree oldname; | |
435 | tree newname; | |
436 | } pending_redefinition; | |
437 | ||
4f8c876d | 438 | |
9771b263 | 439 | static GTY(()) vec<pending_redefinition, va_gc> *pending_redefine_extname; |
e2500fed | 440 | |
35b1a6fa | 441 | static void handle_pragma_redefine_extname (cpp_reader *); |
41c64394 | 442 | |
84b8b0e0 | 443 | /* #pragma redefine_extname oldname newname */ |
41c64394 | 444 | static void |
e18476eb | 445 | handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy)) |
41c64394 | 446 | { |
3a636414 | 447 | tree oldname, newname, decls, x; |
41c64394 | 448 | enum cpp_ttype t; |
3a636414 | 449 | bool found; |
41c64394 | 450 | |
75ce3d48 | 451 | if (pragma_lex (&oldname) != CPP_NAME) |
84b8b0e0 | 452 | GCC_BAD ("malformed #pragma redefine_extname, ignored"); |
75ce3d48 | 453 | if (pragma_lex (&newname) != CPP_NAME) |
84b8b0e0 | 454 | GCC_BAD ("malformed #pragma redefine_extname, ignored"); |
75ce3d48 | 455 | t = pragma_lex (&x); |
41c64394 | 456 | if (t != CPP_EOF) |
bc4071dd | 457 | warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>"); |
41c64394 | 458 | |
3a636414 JM |
459 | found = false; |
460 | for (decls = c_linkage_bindings (oldname); | |
461 | decls; ) | |
41c64394 | 462 | { |
3a636414 JM |
463 | tree decl; |
464 | if (TREE_CODE (decls) == TREE_LIST) | |
84b8b0e0 | 465 | { |
3a636414 JM |
466 | decl = TREE_VALUE (decls); |
467 | decls = TREE_CHAIN (decls); | |
84b8b0e0 ZW |
468 | } |
469 | else | |
3a636414 JM |
470 | { |
471 | decl = decls; | |
472 | decls = NULL_TREE; | |
473 | } | |
474 | ||
475 | if ((TREE_PUBLIC (decl) || DECL_EXTERNAL (decl)) | |
476 | && (TREE_CODE (decl) == FUNCTION_DECL | |
477 | || TREE_CODE (decl) == VAR_DECL)) | |
478 | { | |
479 | found = true; | |
480 | if (DECL_ASSEMBLER_NAME_SET_P (decl)) | |
481 | { | |
482 | const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
483 | name = targetm.strip_name_encoding (name); | |
484 | ||
485 | if (strcmp (name, IDENTIFIER_POINTER (newname))) | |
486 | warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
487 | "conflict with previous rename"); | |
488 | } | |
489 | else | |
3dafb85c | 490 | symtab->change_decl_assembler_name (decl, newname); |
3a636414 | 491 | } |
41c64394 | 492 | } |
3a636414 JM |
493 | |
494 | if (!found) | |
84b8b0e0 ZW |
495 | /* We have to add this to the rename list even if there's already |
496 | a global value that doesn't meet the above criteria, because in | |
497 | C++ "struct foo {...};" puts "foo" in the current namespace but | |
498 | does *not* conflict with a subsequent declaration of a function | |
499 | or variable foo. See g++.dg/other/pragma-re-2.C. */ | |
500 | add_to_renaming_pragma_list (oldname, newname); | |
41c64394 | 501 | } |
41c64394 | 502 | |
fb037b5d | 503 | /* This is called from here and from ia64-c.c. */ |
0c3a2ea0 | 504 | void |
35b1a6fa | 505 | add_to_renaming_pragma_list (tree oldname, tree newname) |
0c3a2ea0 | 506 | { |
4f8c876d NF |
507 | unsigned ix; |
508 | pending_redefinition *p; | |
509 | ||
9771b263 | 510 | FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p) |
4f8c876d NF |
511 | if (oldname == p->oldname) |
512 | { | |
513 | if (p->newname != newname) | |
514 | warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " | |
515 | "conflict with previous #pragma redefine_extname"); | |
516 | return; | |
517 | } | |
c22cacf3 | 518 | |
f32682ca | 519 | pending_redefinition e = {oldname, newname}; |
9771b263 | 520 | vec_safe_push (pending_redefine_extname, e); |
0c3a2ea0 SE |
521 | } |
522 | ||
e50e723e TG |
523 | /* The current prefix set by #pragma extern_prefix. */ |
524 | GTY(()) tree pragma_extern_prefix; | |
e2500fed | 525 | |
95bd1dd7 | 526 | /* Hook from the front ends to apply the results of one of the preceding |
41c64394 RH |
527 | pragmas that rename variables. */ |
528 | ||
529 | tree | |
35b1a6fa | 530 | maybe_apply_renaming_pragma (tree decl, tree asmname) |
41c64394 | 531 | { |
4f8c876d NF |
532 | unsigned ix; |
533 | pending_redefinition *p; | |
84b8b0e0 ZW |
534 | |
535 | /* The renaming pragmas are only applied to declarations with | |
536 | external linkage. */ | |
537 | if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) | |
538 | || (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) | |
539 | || !has_c_linkage (decl)) | |
41c64394 RH |
540 | return asmname; |
541 | ||
84b8b0e0 ZW |
542 | /* If the DECL_ASSEMBLER_NAME is already set, it does not change, |
543 | but we may warn about a rename that conflicts. */ | |
544 | if (DECL_ASSEMBLER_NAME_SET_P (decl)) | |
41c64394 | 545 | { |
84b8b0e0 ZW |
546 | const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
547 | oldname = targetm.strip_name_encoding (oldname); | |
548 | ||
549 | if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname)) | |
b9b8dde3 | 550 | warning (OPT_Wpragmas, "asm declaration ignored due to " |
84b8b0e0 ZW |
551 | "conflict with previous rename"); |
552 | ||
553 | /* Take any pending redefine_extname off the list. */ | |
9771b263 | 554 | FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p) |
4f8c876d | 555 | if (DECL_NAME (decl) == p->oldname) |
84b8b0e0 ZW |
556 | { |
557 | /* Only warn if there is a conflict. */ | |
4f8c876d | 558 | if (strcmp (IDENTIFIER_POINTER (p->newname), oldname)) |
b9b8dde3 | 559 | warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " |
84b8b0e0 ZW |
560 | "conflict with previous rename"); |
561 | ||
9771b263 | 562 | pending_redefine_extname->unordered_remove (ix); |
84b8b0e0 ZW |
563 | break; |
564 | } | |
565 | return 0; | |
41c64394 RH |
566 | } |
567 | ||
84b8b0e0 | 568 | /* Find out if we have a pending #pragma redefine_extname. */ |
9771b263 | 569 | FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p) |
4f8c876d | 570 | if (DECL_NAME (decl) == p->oldname) |
84b8b0e0 | 571 | { |
4f8c876d | 572 | tree newname = p->newname; |
9771b263 | 573 | pending_redefine_extname->unordered_remove (ix); |
41c64394 | 574 | |
84b8b0e0 | 575 | /* If we already have an asmname, #pragma redefine_extname is |
c22cacf3 | 576 | ignored (with a warning if it conflicts). */ |
84b8b0e0 ZW |
577 | if (asmname) |
578 | { | |
579 | if (strcmp (TREE_STRING_POINTER (asmname), | |
580 | IDENTIFIER_POINTER (newname)) != 0) | |
b9b8dde3 | 581 | warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to " |
84b8b0e0 ZW |
582 | "conflict with __asm__ declaration"); |
583 | return asmname; | |
584 | } | |
41c64394 | 585 | |
84b8b0e0 ZW |
586 | /* Otherwise we use what we've got; #pragma extern_prefix is |
587 | silently ignored. */ | |
588 | return build_string (IDENTIFIER_LENGTH (newname), | |
589 | IDENTIFIER_POINTER (newname)); | |
590 | } | |
41c64394 | 591 | |
84b8b0e0 ZW |
592 | /* If we've got an asmname, #pragma extern_prefix is silently ignored. */ |
593 | if (asmname) | |
594 | return asmname; | |
41c64394 | 595 | |
84b8b0e0 ZW |
596 | /* If #pragma extern_prefix is in effect, apply it. */ |
597 | if (pragma_extern_prefix) | |
41c64394 | 598 | { |
84b8b0e0 ZW |
599 | const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix); |
600 | size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1; | |
601 | ||
602 | const char *id = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
603 | size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl)); | |
c22cacf3 | 604 | |
28dab132 | 605 | char *newname = (char *) alloca (plen + ilen + 1); |
84b8b0e0 ZW |
606 | |
607 | memcpy (newname, prefix, plen); | |
608 | memcpy (newname + plen, id, ilen + 1); | |
609 | ||
610 | return build_string (plen + ilen, newname); | |
41c64394 | 611 | } |
41c64394 | 612 | |
84b8b0e0 ZW |
613 | /* Nada. */ |
614 | return 0; | |
41c64394 RH |
615 | } |
616 | ||
d7afec4b | 617 | |
d7afec4b ND |
618 | static void handle_pragma_visibility (cpp_reader *); |
619 | ||
9771b263 | 620 | static vec<int> visstack; |
0ed5edac JM |
621 | |
622 | /* Push the visibility indicated by STR onto the top of the #pragma | |
9789ba46 JJ |
623 | visibility stack. KIND is 0 for #pragma GCC visibility, 1 for |
624 | C++ namespace with visibility attribute and 2 for C++ builtin | |
625 | ABI namespace. push_visibility/pop_visibility calls must have | |
626 | matching KIND, it is not allowed to push visibility using one | |
627 | KIND and pop using a different one. */ | |
0ed5edac JM |
628 | |
629 | void | |
9789ba46 | 630 | push_visibility (const char *str, int kind) |
0ed5edac | 631 | { |
9771b263 | 632 | visstack.safe_push (((int) default_visibility) | (kind << 8)); |
0ed5edac JM |
633 | if (!strcmp (str, "default")) |
634 | default_visibility = VISIBILITY_DEFAULT; | |
635 | else if (!strcmp (str, "internal")) | |
636 | default_visibility = VISIBILITY_INTERNAL; | |
637 | else if (!strcmp (str, "hidden")) | |
c22cacf3 | 638 | default_visibility = VISIBILITY_HIDDEN; |
0ed5edac JM |
639 | else if (!strcmp (str, "protected")) |
640 | default_visibility = VISIBILITY_PROTECTED; | |
641 | else | |
642 | GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected"); | |
643 | visibility_options.inpragma = 1; | |
644 | } | |
645 | ||
9789ba46 JJ |
646 | /* Pop a level of the #pragma visibility stack. Return true if |
647 | successful. */ | |
0ed5edac | 648 | |
9789ba46 JJ |
649 | bool |
650 | pop_visibility (int kind) | |
0ed5edac | 651 | { |
9771b263 | 652 | if (!visstack.length ()) |
9789ba46 | 653 | return false; |
9771b263 | 654 | if ((visstack.last () >> 8) != kind) |
9789ba46 JJ |
655 | return false; |
656 | default_visibility | |
9771b263 | 657 | = (enum symbol_visibility) (visstack.pop () & 0xff); |
0ed5edac | 658 | visibility_options.inpragma |
9771b263 | 659 | = visstack.length () != 0; |
9789ba46 | 660 | return true; |
c22cacf3 | 661 | } |
be1b1c9b | 662 | |
d7afec4b ND |
663 | /* Sets the default visibility for symbols to something other than that |
664 | specified on the command line. */ | |
0ed5edac | 665 | |
d7afec4b ND |
666 | static void |
667 | handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED) | |
be1b1c9b L |
668 | { |
669 | /* Form is #pragma GCC visibility push(hidden)|pop */ | |
d7afec4b ND |
670 | tree x; |
671 | enum cpp_ttype token; | |
672 | enum { bad, push, pop } action = bad; | |
c22cacf3 | 673 | |
75ce3d48 | 674 | token = pragma_lex (&x); |
d7afec4b ND |
675 | if (token == CPP_NAME) |
676 | { | |
677 | const char *op = IDENTIFIER_POINTER (x); | |
678 | if (!strcmp (op, "push")) | |
c22cacf3 | 679 | action = push; |
d7afec4b | 680 | else if (!strcmp (op, "pop")) |
c22cacf3 | 681 | action = pop; |
d7afec4b ND |
682 | } |
683 | if (bad == action) | |
684 | GCC_BAD ("#pragma GCC visibility must be followed by push or pop"); | |
685 | else | |
686 | { | |
687 | if (pop == action) | |
c22cacf3 | 688 | { |
9789ba46 | 689 | if (! pop_visibility (0)) |
0ed5edac | 690 | GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>"); |
c22cacf3 | 691 | } |
d7afec4b | 692 | else |
c22cacf3 MS |
693 | { |
694 | if (pragma_lex (&x) != CPP_OPEN_PAREN) | |
695 | GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored"); | |
696 | token = pragma_lex (&x); | |
697 | if (token != CPP_NAME) | |
0ed5edac | 698 | GCC_BAD ("malformed #pragma GCC visibility push"); |
c22cacf3 | 699 | else |
9789ba46 | 700 | push_visibility (IDENTIFIER_POINTER (x), 0); |
c22cacf3 MS |
701 | if (pragma_lex (&x) != CPP_CLOSE_PAREN) |
702 | GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored"); | |
703 | } | |
d7afec4b | 704 | } |
75ce3d48 | 705 | if (pragma_lex (&x) != CPP_EOF) |
b9b8dde3 | 706 | warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>"); |
d7afec4b ND |
707 | } |
708 | ||
79cf5994 DD |
709 | static void |
710 | handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy)) | |
711 | { | |
712 | const char *kind_string, *option_string; | |
713 | unsigned int option_index; | |
714 | enum cpp_ttype token; | |
715 | diagnostic_t kind; | |
716 | tree x; | |
c5fa0890 | 717 | struct cl_option_handlers handlers; |
79cf5994 | 718 | |
79cf5994 DD |
719 | token = pragma_lex (&x); |
720 | if (token != CPP_NAME) | |
721 | GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>"); | |
722 | kind_string = IDENTIFIER_POINTER (x); | |
723 | if (strcmp (kind_string, "error") == 0) | |
724 | kind = DK_ERROR; | |
725 | else if (strcmp (kind_string, "warning") == 0) | |
726 | kind = DK_WARNING; | |
727 | else if (strcmp (kind_string, "ignored") == 0) | |
728 | kind = DK_IGNORED; | |
cd7fe53b DD |
729 | else if (strcmp (kind_string, "push") == 0) |
730 | { | |
731 | diagnostic_push_diagnostics (global_dc, input_location); | |
732 | return; | |
733 | } | |
734 | else if (strcmp (kind_string, "pop") == 0) | |
735 | { | |
736 | diagnostic_pop_diagnostics (global_dc, input_location); | |
737 | return; | |
738 | } | |
79cf5994 | 739 | else |
cd7fe53b | 740 | GCC_BAD ("expected [error|warning|ignored|push|pop] after %<#pragma GCC diagnostic%>"); |
79cf5994 DD |
741 | |
742 | token = pragma_lex (&x); | |
743 | if (token != CPP_STRING) | |
744 | GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind"); | |
745 | option_string = TREE_STRING_POINTER (x); | |
c5fa0890 | 746 | set_default_handlers (&handlers); |
79cf5994 DD |
747 | for (option_index = 0; option_index < cl_options_count; option_index++) |
748 | if (strcmp (cl_options[option_index].opt_text, option_string) == 0) | |
749 | { | |
c5fa0890 JM |
750 | control_warning_option (option_index, (int) kind, kind != DK_IGNORED, |
751 | input_location, c_family_lang_mask, &handlers, | |
752 | &global_options, &global_options_set, | |
753 | global_dc); | |
79cf5994 DD |
754 | return; |
755 | } | |
756 | GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind"); | |
757 | } | |
758 | ||
5779e713 | 759 | /* Parse #pragma GCC target (xxx) to set target specific options. */ |
ab442df7 | 760 | static void |
5779e713 | 761 | handle_pragma_target(cpp_reader *ARG_UNUSED(dummy)) |
ab442df7 MM |
762 | { |
763 | enum cpp_ttype token; | |
ab442df7 MM |
764 | tree x; |
765 | bool close_paren_needed_p = false; | |
766 | ||
767 | if (cfun) | |
768 | { | |
769 | error ("#pragma GCC option is not allowed inside functions"); | |
770 | return; | |
771 | } | |
772 | ||
ab442df7 MM |
773 | token = pragma_lex (&x); |
774 | if (token == CPP_OPEN_PAREN) | |
775 | { | |
776 | close_paren_needed_p = true; | |
777 | token = pragma_lex (&x); | |
778 | } | |
779 | ||
5779e713 | 780 | if (token != CPP_STRING) |
ab442df7 | 781 | { |
5779e713 | 782 | GCC_BAD ("%<#pragma GCC option%> is not a string"); |
ab442df7 MM |
783 | return; |
784 | } | |
785 | ||
786 | /* Strings are user options. */ | |
787 | else | |
788 | { | |
789 | tree args = NULL_TREE; | |
790 | ||
791 | do | |
792 | { | |
793 | /* Build up the strings now as a tree linked list. Skip empty | |
794 | strings. */ | |
795 | if (TREE_STRING_LENGTH (x) > 0) | |
796 | args = tree_cons (NULL_TREE, x, args); | |
797 | ||
798 | token = pragma_lex (&x); | |
799 | while (token == CPP_COMMA) | |
800 | token = pragma_lex (&x); | |
801 | } | |
802 | while (token == CPP_STRING); | |
803 | ||
804 | if (close_paren_needed_p) | |
805 | { | |
806 | if (token == CPP_CLOSE_PAREN) | |
807 | token = pragma_lex (&x); | |
808 | else | |
5779e713 | 809 | GCC_BAD ("%<#pragma GCC target (string [,string]...)%> does " |
d8a07487 | 810 | "not have a final %<)%>"); |
ab442df7 MM |
811 | } |
812 | ||
813 | if (token != CPP_EOF) | |
814 | { | |
5779e713 | 815 | error ("#pragma GCC target string... is badly formed"); |
ab442df7 MM |
816 | return; |
817 | } | |
818 | ||
819 | /* put arguments in the order the user typed them. */ | |
820 | args = nreverse (args); | |
821 | ||
5779e713 MM |
822 | if (targetm.target_option.pragma_parse (args, NULL_TREE)) |
823 | current_target_pragma = args; | |
ab442df7 MM |
824 | } |
825 | } | |
826 | ||
ab442df7 MM |
827 | /* Handle #pragma GCC optimize to set optimization options. */ |
828 | static void | |
5779e713 | 829 | handle_pragma_optimize (cpp_reader *ARG_UNUSED(dummy)) |
ab442df7 MM |
830 | { |
831 | enum cpp_ttype token; | |
ab442df7 MM |
832 | tree x; |
833 | bool close_paren_needed_p = false; | |
834 | tree optimization_previous_node = optimization_current_node; | |
835 | ||
836 | if (cfun) | |
837 | { | |
838 | error ("#pragma GCC optimize is not allowed inside functions"); | |
839 | return; | |
840 | } | |
841 | ||
842 | token = pragma_lex (&x); | |
843 | if (token == CPP_OPEN_PAREN) | |
844 | { | |
845 | close_paren_needed_p = true; | |
846 | token = pragma_lex (&x); | |
847 | } | |
848 | ||
5779e713 | 849 | if (token != CPP_STRING && token != CPP_NUMBER) |
ab442df7 | 850 | { |
5779e713 | 851 | GCC_BAD ("%<#pragma GCC optimize%> is not a string or number"); |
ab442df7 MM |
852 | return; |
853 | } | |
854 | ||
855 | /* Strings/numbers are user options. */ | |
856 | else | |
857 | { | |
858 | tree args = NULL_TREE; | |
859 | ||
860 | do | |
861 | { | |
862 | /* Build up the numbers/strings now as a list. */ | |
863 | if (token != CPP_STRING || TREE_STRING_LENGTH (x) > 0) | |
864 | args = tree_cons (NULL_TREE, x, args); | |
865 | ||
866 | token = pragma_lex (&x); | |
867 | while (token == CPP_COMMA) | |
868 | token = pragma_lex (&x); | |
869 | } | |
870 | while (token == CPP_STRING || token == CPP_NUMBER); | |
871 | ||
872 | if (close_paren_needed_p) | |
873 | { | |
874 | if (token == CPP_CLOSE_PAREN) | |
875 | token = pragma_lex (&x); | |
876 | else | |
877 | GCC_BAD ("%<#pragma GCC optimize (string [,string]...)%> does " | |
d8a07487 | 878 | "not have a final %<)%>"); |
ab442df7 MM |
879 | } |
880 | ||
881 | if (token != CPP_EOF) | |
882 | { | |
883 | error ("#pragma GCC optimize string... is badly formed"); | |
884 | return; | |
885 | } | |
886 | ||
887 | /* put arguments in the order the user typed them. */ | |
888 | args = nreverse (args); | |
889 | ||
890 | parse_optimize_options (args, false); | |
5779e713 | 891 | current_optimize_pragma = chainon (current_optimize_pragma, args); |
bf7b5747 | 892 | optimization_current_node = build_optimization_node (&global_options); |
ab442df7 MM |
893 | c_cpp_builtins_optimize_pragma (parse_in, |
894 | optimization_previous_node, | |
895 | optimization_current_node); | |
896 | } | |
897 | } | |
898 | ||
5779e713 MM |
899 | /* Stack of the #pragma GCC options created with #pragma GCC push_option. Save |
900 | both the binary representation of the options and the TREE_LIST of | |
901 | strings that will be added to the function's attribute list. */ | |
d1b38208 | 902 | typedef struct GTY(()) opt_stack { |
5779e713 MM |
903 | struct opt_stack *prev; |
904 | tree target_binary; | |
905 | tree target_strings; | |
906 | tree optimize_binary; | |
907 | tree optimize_strings; | |
908 | } opt_stack; | |
909 | ||
910 | static GTY(()) struct opt_stack * options_stack; | |
911 | ||
912 | /* Handle #pragma GCC push_options to save the current target and optimization | |
913 | options. */ | |
914 | ||
915 | static void | |
916 | handle_pragma_push_options (cpp_reader *ARG_UNUSED(dummy)) | |
917 | { | |
918 | enum cpp_ttype token; | |
919 | tree x = 0; | |
5779e713 MM |
920 | |
921 | token = pragma_lex (&x); | |
922 | if (token != CPP_EOF) | |
923 | { | |
924 | warning (OPT_Wpragmas, "junk at end of %<#pragma push_options%>"); | |
925 | return; | |
926 | } | |
927 | ||
766090c2 | 928 | opt_stack *p = ggc_alloc<opt_stack> (); |
5779e713 MM |
929 | p->prev = options_stack; |
930 | options_stack = p; | |
931 | ||
932 | /* Save optimization and target flags in binary format. */ | |
bf7b5747 ST |
933 | p->optimize_binary = build_optimization_node (&global_options); |
934 | p->target_binary = build_target_option_node (&global_options); | |
5779e713 MM |
935 | |
936 | /* Save optimization and target flags in string list format. */ | |
937 | p->optimize_strings = copy_list (current_optimize_pragma); | |
938 | p->target_strings = copy_list (current_target_pragma); | |
939 | } | |
940 | ||
941 | /* Handle #pragma GCC pop_options to restore the current target and | |
942 | optimization options from a previous push_options. */ | |
943 | ||
944 | static void | |
945 | handle_pragma_pop_options (cpp_reader *ARG_UNUSED(dummy)) | |
946 | { | |
947 | enum cpp_ttype token; | |
948 | tree x = 0; | |
949 | opt_stack *p; | |
950 | ||
951 | token = pragma_lex (&x); | |
952 | if (token != CPP_EOF) | |
953 | { | |
954 | warning (OPT_Wpragmas, "junk at end of %<#pragma pop_options%>"); | |
955 | return; | |
956 | } | |
957 | ||
958 | if (! options_stack) | |
959 | { | |
960 | warning (OPT_Wpragmas, | |
961 | "%<#pragma GCC pop_options%> without a corresponding " | |
962 | "%<#pragma GCC push_options%>"); | |
963 | return; | |
964 | } | |
965 | ||
966 | p = options_stack; | |
967 | options_stack = p->prev; | |
968 | ||
969 | if (p->target_binary != target_option_current_node) | |
970 | { | |
971 | (void) targetm.target_option.pragma_parse (NULL_TREE, p->target_binary); | |
972 | target_option_current_node = p->target_binary; | |
973 | } | |
974 | ||
975 | if (p->optimize_binary != optimization_current_node) | |
976 | { | |
977 | tree old_optimize = optimization_current_node; | |
46625112 JM |
978 | cl_optimization_restore (&global_options, |
979 | TREE_OPTIMIZATION (p->optimize_binary)); | |
5779e713 MM |
980 | c_cpp_builtins_optimize_pragma (parse_in, old_optimize, |
981 | p->optimize_binary); | |
982 | optimization_current_node = p->optimize_binary; | |
983 | } | |
984 | ||
985 | current_target_pragma = p->target_strings; | |
986 | current_optimize_pragma = p->optimize_strings; | |
987 | } | |
988 | ||
989 | /* Handle #pragma GCC reset_options to restore the current target and | |
990 | optimization options to the original options used on the command line. */ | |
991 | ||
992 | static void | |
993 | handle_pragma_reset_options (cpp_reader *ARG_UNUSED(dummy)) | |
994 | { | |
995 | enum cpp_ttype token; | |
996 | tree x = 0; | |
997 | tree new_optimize = optimization_default_node; | |
998 | tree new_target = target_option_default_node; | |
999 | ||
1000 | token = pragma_lex (&x); | |
1001 | if (token != CPP_EOF) | |
1002 | { | |
1003 | warning (OPT_Wpragmas, "junk at end of %<#pragma reset_options%>"); | |
1004 | return; | |
1005 | } | |
1006 | ||
1007 | if (new_target != target_option_current_node) | |
1008 | { | |
1009 | (void) targetm.target_option.pragma_parse (NULL_TREE, new_target); | |
1010 | target_option_current_node = new_target; | |
1011 | } | |
1012 | ||
1013 | if (new_optimize != optimization_current_node) | |
1014 | { | |
1015 | tree old_optimize = optimization_current_node; | |
46625112 JM |
1016 | cl_optimization_restore (&global_options, |
1017 | TREE_OPTIMIZATION (new_optimize)); | |
5779e713 MM |
1018 | c_cpp_builtins_optimize_pragma (parse_in, old_optimize, new_optimize); |
1019 | optimization_current_node = new_optimize; | |
1020 | } | |
1021 | ||
1022 | current_target_pragma = NULL_TREE; | |
1023 | current_optimize_pragma = NULL_TREE; | |
1024 | } | |
1025 | ||
0d48657d SB |
1026 | /* Print a plain user-specified message. */ |
1027 | ||
1028 | static void | |
1029 | handle_pragma_message (cpp_reader *ARG_UNUSED(dummy)) | |
1030 | { | |
1031 | enum cpp_ttype token; | |
1032 | tree x, message = 0; | |
1033 | ||
1034 | token = pragma_lex (&x); | |
1035 | if (token == CPP_OPEN_PAREN) | |
1036 | { | |
1037 | token = pragma_lex (&x); | |
1038 | if (token == CPP_STRING) | |
1039 | message = x; | |
1040 | else | |
1041 | GCC_BAD ("expected a string after %<#pragma message%>"); | |
1042 | if (pragma_lex (&x) != CPP_CLOSE_PAREN) | |
1043 | GCC_BAD ("malformed %<#pragma message%>, ignored"); | |
1044 | } | |
1045 | else if (token == CPP_STRING) | |
1046 | message = x; | |
1047 | else | |
1048 | GCC_BAD ("expected a string after %<#pragma message%>"); | |
1049 | ||
1050 | gcc_assert (message); | |
1051 | ||
1052 | if (pragma_lex (&x) != CPP_EOF) | |
1053 | warning (OPT_Wpragmas, "junk at end of %<#pragma message%>"); | |
1054 | ||
1055 | if (TREE_STRING_LENGTH (message) > 1) | |
1f5b3869 | 1056 | inform (input_location, "#pragma message: %s", TREE_STRING_POINTER (message)); |
0d48657d SB |
1057 | } |
1058 | ||
6ec637a4 JJ |
1059 | /* Mark whether the current location is valid for a STDC pragma. */ |
1060 | ||
1061 | static bool valid_location_for_stdc_pragma; | |
1062 | ||
1063 | void | |
1064 | mark_valid_location_for_stdc_pragma (bool flag) | |
1065 | { | |
1066 | valid_location_for_stdc_pragma = flag; | |
1067 | } | |
1068 | ||
1069 | /* Return true if the current location is valid for a STDC pragma. */ | |
1070 | ||
1071 | bool | |
1072 | valid_location_for_stdc_pragma_p (void) | |
1073 | { | |
1074 | return valid_location_for_stdc_pragma; | |
1075 | } | |
1076 | ||
7de1d221 | 1077 | enum pragma_switch_t { PRAGMA_ON, PRAGMA_OFF, PRAGMA_DEFAULT, PRAGMA_BAD }; |
6ec637a4 JJ |
1078 | |
1079 | /* A STDC pragma must appear outside of external declarations or | |
1080 | preceding all explicit declarations and statements inside a compound | |
1081 | statement; its behavior is undefined if used in any other context. | |
1082 | It takes a switch of ON, OFF, or DEFAULT. */ | |
1083 | ||
1084 | static enum pragma_switch_t | |
1085 | handle_stdc_pragma (const char *pname) | |
1086 | { | |
1087 | const char *arg; | |
1088 | tree t; | |
1089 | enum pragma_switch_t ret; | |
1090 | ||
1091 | if (!valid_location_for_stdc_pragma_p ()) | |
1092 | { | |
1093 | warning (OPT_Wpragmas, "invalid location for %<pragma %s%>, ignored", | |
1094 | pname); | |
7de1d221 | 1095 | return PRAGMA_BAD; |
6ec637a4 JJ |
1096 | } |
1097 | ||
1098 | if (pragma_lex (&t) != CPP_NAME) | |
1099 | { | |
1100 | warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname); | |
7de1d221 | 1101 | return PRAGMA_BAD; |
6ec637a4 JJ |
1102 | } |
1103 | ||
1104 | arg = IDENTIFIER_POINTER (t); | |
1105 | ||
1106 | if (!strcmp (arg, "ON")) | |
7de1d221 | 1107 | ret = PRAGMA_ON; |
6ec637a4 | 1108 | else if (!strcmp (arg, "OFF")) |
7de1d221 | 1109 | ret = PRAGMA_OFF; |
6ec637a4 | 1110 | else if (!strcmp (arg, "DEFAULT")) |
7de1d221 | 1111 | ret = PRAGMA_DEFAULT; |
6ec637a4 JJ |
1112 | else |
1113 | { | |
1114 | warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname); | |
7de1d221 | 1115 | return PRAGMA_BAD; |
6ec637a4 JJ |
1116 | } |
1117 | ||
1118 | if (pragma_lex (&t) != CPP_EOF) | |
1119 | { | |
1120 | warning (OPT_Wpragmas, "junk at end of %<#pragma %s%>", pname); | |
7de1d221 | 1121 | return PRAGMA_BAD; |
6ec637a4 JJ |
1122 | } |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
1127 | /* #pragma STDC FLOAT_CONST_DECIMAL64 ON | |
1128 | #pragma STDC FLOAT_CONST_DECIMAL64 OFF | |
1129 | #pragma STDC FLOAT_CONST_DECIMAL64 DEFAULT */ | |
1130 | ||
1131 | static void | |
1132 | handle_pragma_float_const_decimal64 (cpp_reader *ARG_UNUSED (dummy)) | |
1133 | { | |
1134 | if (c_dialect_cxx ()) | |
1135 | { | |
8400e75e | 1136 | if (warn_unknown_pragmas > in_system_header_at (input_location)) |
6ec637a4 JJ |
1137 | warning (OPT_Wunknown_pragmas, |
1138 | "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported" | |
1139 | " for C++"); | |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | if (!targetm.decimal_float_supported_p ()) | |
1144 | { | |
8400e75e | 1145 | if (warn_unknown_pragmas > in_system_header_at (input_location)) |
6ec637a4 JJ |
1146 | warning (OPT_Wunknown_pragmas, |
1147 | "%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported" | |
1148 | " on this target"); | |
1149 | return; | |
1150 | } | |
1151 | ||
c1771a20 | 1152 | pedwarn (input_location, OPT_Wpedantic, |
6ec637a4 JJ |
1153 | "ISO C does not support %<#pragma STDC FLOAT_CONST_DECIMAL64%>"); |
1154 | ||
1155 | switch (handle_stdc_pragma ("STDC FLOAT_CONST_DECIMAL64")) | |
1156 | { | |
7de1d221 | 1157 | case PRAGMA_ON: |
6ec637a4 JJ |
1158 | set_float_const_decimal64 (); |
1159 | break; | |
7de1d221 JJ |
1160 | case PRAGMA_OFF: |
1161 | case PRAGMA_DEFAULT: | |
6ec637a4 JJ |
1162 | clear_float_const_decimal64 (); |
1163 | break; | |
7de1d221 | 1164 | case PRAGMA_BAD: |
6ec637a4 JJ |
1165 | break; |
1166 | } | |
1167 | } | |
1168 | ||
dfb43cd5 | 1169 | /* A vector of registered pragma callbacks, which is never freed. */ |
bc4071dd | 1170 | |
9771b263 | 1171 | static vec<internal_pragma_handler> registered_pragmas; |
bc4071dd | 1172 | |
a25a8f3b JJ |
1173 | typedef struct |
1174 | { | |
1175 | const char *space; | |
1176 | const char *name; | |
1177 | } pragma_ns_name; | |
1178 | ||
a25a8f3b | 1179 | |
9771b263 | 1180 | static vec<pragma_ns_name> registered_pp_pragmas; |
a25a8f3b JJ |
1181 | |
1182 | struct omp_pragma_def { const char *name; unsigned int id; }; | |
1183 | static const struct omp_pragma_def omp_pragmas[] = { | |
1184 | { "atomic", PRAGMA_OMP_ATOMIC }, | |
1185 | { "barrier", PRAGMA_OMP_BARRIER }, | |
acf0174b JJ |
1186 | { "cancel", PRAGMA_OMP_CANCEL }, |
1187 | { "cancellation", PRAGMA_OMP_CANCELLATION_POINT }, | |
a25a8f3b | 1188 | { "critical", PRAGMA_OMP_CRITICAL }, |
acf0174b | 1189 | { "end", PRAGMA_OMP_END_DECLARE_TARGET }, |
a25a8f3b | 1190 | { "flush", PRAGMA_OMP_FLUSH }, |
a25a8f3b JJ |
1191 | { "master", PRAGMA_OMP_MASTER }, |
1192 | { "ordered", PRAGMA_OMP_ORDERED }, | |
a25a8f3b JJ |
1193 | { "section", PRAGMA_OMP_SECTION }, |
1194 | { "sections", PRAGMA_OMP_SECTIONS }, | |
1195 | { "single", PRAGMA_OMP_SINGLE }, | |
92d28cbb | 1196 | { "task", PRAGMA_OMP_TASK }, |
acf0174b | 1197 | { "taskgroup", PRAGMA_OMP_TASKGROUP }, |
a68ab351 | 1198 | { "taskwait", PRAGMA_OMP_TASKWAIT }, |
20906c66 | 1199 | { "taskyield", PRAGMA_OMP_TASKYIELD }, |
a25a8f3b JJ |
1200 | { "threadprivate", PRAGMA_OMP_THREADPRIVATE } |
1201 | }; | |
6d7f7e0a TB |
1202 | static const struct omp_pragma_def omp_pragmas_simd[] = { |
1203 | { "declare", PRAGMA_OMP_DECLARE_REDUCTION }, | |
1204 | { "distribute", PRAGMA_OMP_DISTRIBUTE }, | |
1205 | { "for", PRAGMA_OMP_FOR }, | |
1206 | { "parallel", PRAGMA_OMP_PARALLEL }, | |
1207 | { "simd", PRAGMA_OMP_SIMD }, | |
1208 | { "target", PRAGMA_OMP_TARGET }, | |
6d7f7e0a TB |
1209 | { "teams", PRAGMA_OMP_TEAMS }, |
1210 | }; | |
a25a8f3b JJ |
1211 | |
1212 | void | |
1213 | c_pp_lookup_pragma (unsigned int id, const char **space, const char **name) | |
1214 | { | |
1215 | const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas); | |
6d7f7e0a TB |
1216 | const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd) |
1217 | / sizeof (*omp_pragmas); | |
a25a8f3b JJ |
1218 | int i; |
1219 | ||
1220 | for (i = 0; i < n_omp_pragmas; ++i) | |
1221 | if (omp_pragmas[i].id == id) | |
1222 | { | |
1223 | *space = "omp"; | |
1224 | *name = omp_pragmas[i].name; | |
1225 | return; | |
1226 | } | |
1227 | ||
6d7f7e0a TB |
1228 | for (i = 0; i < n_omp_pragmas_simd; ++i) |
1229 | if (omp_pragmas_simd[i].id == id) | |
1230 | { | |
1231 | *space = "omp"; | |
1232 | *name = omp_pragmas_simd[i].name; | |
1233 | return; | |
1234 | } | |
1235 | ||
b3bdf019 JJ |
1236 | if (id == PRAGMA_CILK_SIMD) |
1237 | { | |
1238 | *space = NULL; | |
1239 | *name = "simd"; | |
1240 | return; | |
1241 | } | |
1242 | ||
a25a8f3b | 1243 | if (id >= PRAGMA_FIRST_EXTERNAL |
9771b263 | 1244 | && (id < PRAGMA_FIRST_EXTERNAL + registered_pp_pragmas.length ())) |
a25a8f3b | 1245 | { |
9771b263 DN |
1246 | *space = registered_pp_pragmas[id - PRAGMA_FIRST_EXTERNAL].space; |
1247 | *name = registered_pp_pragmas[id - PRAGMA_FIRST_EXTERNAL].name; | |
a25a8f3b JJ |
1248 | return; |
1249 | } | |
1250 | ||
1251 | gcc_unreachable (); | |
1252 | } | |
1253 | ||
b5b3e36a | 1254 | /* Front-end wrappers for pragma registration to avoid dragging |
c58b209a | 1255 | cpplib.h in almost everywhere. */ |
bc4071dd RH |
1256 | |
1257 | static void | |
1258 | c_register_pragma_1 (const char *space, const char *name, | |
dfb43cd5 | 1259 | internal_pragma_handler ihandler, bool allow_expansion) |
bc4071dd RH |
1260 | { |
1261 | unsigned id; | |
1262 | ||
a25a8f3b JJ |
1263 | if (flag_preprocess_only) |
1264 | { | |
1265 | pragma_ns_name ns_name; | |
bc4071dd | 1266 | |
a25a8f3b JJ |
1267 | if (!allow_expansion) |
1268 | return; | |
1269 | ||
1270 | ns_name.space = space; | |
1271 | ns_name.name = name; | |
9771b263 DN |
1272 | registered_pp_pragmas.safe_push (ns_name); |
1273 | id = registered_pp_pragmas.length (); | |
a25a8f3b JJ |
1274 | id += PRAGMA_FIRST_EXTERNAL - 1; |
1275 | } | |
1276 | else | |
1277 | { | |
9771b263 DN |
1278 | registered_pragmas.safe_push (ihandler); |
1279 | id = registered_pragmas.length (); | |
a25a8f3b JJ |
1280 | id += PRAGMA_FIRST_EXTERNAL - 1; |
1281 | ||
1282 | /* The C++ front end allocates 6 bits in cp_token; the C front end | |
1283 | allocates 7 bits in c_token. At present this is sufficient. */ | |
1284 | gcc_assert (id < 64); | |
1285 | } | |
bc4071dd RH |
1286 | |
1287 | cpp_register_deferred_pragma (parse_in, space, name, id, | |
1288 | allow_expansion, false); | |
1289 | } | |
1290 | ||
dfb43cd5 PV |
1291 | /* Register a C pragma handler, using a space and a name. It disallows pragma |
1292 | expansion (if you want it, use c_register_pragma_with_expansion instead). */ | |
1293 | void | |
1294 | c_register_pragma (const char *space, const char *name, | |
1295 | pragma_handler_1arg handler) | |
1296 | { | |
1297 | internal_pragma_handler ihandler; | |
1298 | ||
1299 | ihandler.handler.handler_1arg = handler; | |
1300 | ihandler.extra_data = false; | |
1301 | ihandler.data = NULL; | |
1302 | c_register_pragma_1 (space, name, ihandler, false); | |
1303 | } | |
1304 | ||
1305 | /* Register a C pragma handler, using a space and a name, it also carries an | |
1306 | extra data field which can be used by the handler. It disallows pragma | |
1307 | expansion (if you want it, use c_register_pragma_with_expansion_and_data | |
1308 | instead). */ | |
c58b209a | 1309 | void |
dfb43cd5 PV |
1310 | c_register_pragma_with_data (const char *space, const char *name, |
1311 | pragma_handler_2arg handler, void * data) | |
c58b209a | 1312 | { |
dfb43cd5 PV |
1313 | internal_pragma_handler ihandler; |
1314 | ||
1315 | ihandler.handler.handler_2arg = handler; | |
1316 | ihandler.extra_data = true; | |
1317 | ihandler.data = data; | |
1318 | c_register_pragma_1 (space, name, ihandler, false); | |
b5b3e36a DJ |
1319 | } |
1320 | ||
dfb43cd5 PV |
1321 | /* Register a C pragma handler, using a space and a name. It allows pragma |
1322 | expansion as in the following example: | |
1323 | ||
1324 | #define NUMBER 10 | |
1325 | #pragma count (NUMBER) | |
1326 | ||
1327 | Name expansion is still disallowed. */ | |
b5b3e36a DJ |
1328 | void |
1329 | c_register_pragma_with_expansion (const char *space, const char *name, | |
dfb43cd5 | 1330 | pragma_handler_1arg handler) |
bc4071dd | 1331 | { |
dfb43cd5 PV |
1332 | internal_pragma_handler ihandler; |
1333 | ||
1334 | ihandler.handler.handler_1arg = handler; | |
1335 | ihandler.extra_data = false; | |
1336 | ihandler.data = NULL; | |
1337 | c_register_pragma_1 (space, name, ihandler, true); | |
1338 | } | |
1339 | ||
1340 | /* Register a C pragma handler, using a space and a name, it also carries an | |
1341 | extra data field which can be used by the handler. It allows pragma | |
1342 | expansion as in the following example: | |
1343 | ||
1344 | #define NUMBER 10 | |
1345 | #pragma count (NUMBER) | |
1346 | ||
1347 | Name expansion is still disallowed. */ | |
1348 | void | |
1349 | c_register_pragma_with_expansion_and_data (const char *space, const char *name, | |
1350 | pragma_handler_2arg handler, | |
1351 | void *data) | |
1352 | { | |
1353 | internal_pragma_handler ihandler; | |
1354 | ||
1355 | ihandler.handler.handler_2arg = handler; | |
1356 | ihandler.extra_data = true; | |
1357 | ihandler.data = data; | |
1358 | c_register_pragma_1 (space, name, ihandler, true); | |
bc4071dd RH |
1359 | } |
1360 | ||
1361 | void | |
1362 | c_invoke_pragma_handler (unsigned int id) | |
b5b3e36a | 1363 | { |
dfb43cd5 PV |
1364 | internal_pragma_handler *ihandler; |
1365 | pragma_handler_1arg handler_1arg; | |
1366 | pragma_handler_2arg handler_2arg; | |
bc4071dd RH |
1367 | |
1368 | id -= PRAGMA_FIRST_EXTERNAL; | |
9771b263 | 1369 | ihandler = ®istered_pragmas[id]; |
dfb43cd5 PV |
1370 | if (ihandler->extra_data) |
1371 | { | |
1372 | handler_2arg = ihandler->handler.handler_2arg; | |
1373 | handler_2arg (parse_in, ihandler->data); | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | handler_1arg = ihandler->handler.handler_1arg; | |
1378 | handler_1arg (parse_in); | |
1379 | } | |
c58b209a NB |
1380 | } |
1381 | ||
1382 | /* Set up front-end pragmas. */ | |
568767a6 | 1383 | void |
35b1a6fa | 1384 | init_pragma (void) |
568767a6 | 1385 | { |
a25a8f3b | 1386 | if (flag_openmp) |
953ff289 | 1387 | { |
953ff289 DN |
1388 | const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas); |
1389 | int i; | |
1390 | ||
1391 | for (i = 0; i < n_omp_pragmas; ++i) | |
1392 | cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name, | |
1393 | omp_pragmas[i].id, true, true); | |
1394 | } | |
6d7f7e0a TB |
1395 | if (flag_openmp || flag_openmp_simd) |
1396 | { | |
1397 | const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd) | |
1398 | / sizeof (*omp_pragmas); | |
1399 | int i; | |
1400 | ||
1401 | for (i = 0; i < n_omp_pragmas_simd; ++i) | |
1402 | cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas_simd[i].name, | |
1403 | omp_pragmas_simd[i].id, true, true); | |
1404 | } | |
953ff289 | 1405 | |
b3bdf019 | 1406 | if (flag_cilkplus) |
c02065fc AH |
1407 | cpp_register_deferred_pragma (parse_in, NULL, "simd", PRAGMA_CILK_SIMD, |
1408 | true, false); | |
1409 | ||
a25a8f3b JJ |
1410 | if (!flag_preprocess_only) |
1411 | cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess", | |
1412 | PRAGMA_GCC_PCH_PREPROCESS, false, false); | |
bc4071dd | 1413 | |
28e41874 JJ |
1414 | if (!flag_preprocess_only) |
1415 | cpp_register_deferred_pragma (parse_in, "GCC", "ivdep", PRAGMA_IVDEP, false, | |
1416 | false); | |
9a771876 JJ |
1417 | |
1418 | if (flag_cilkplus && !flag_preprocess_only) | |
1419 | cpp_register_deferred_pragma (parse_in, "cilk", "grainsize", | |
1420 | PRAGMA_CILK_GRAINSIZE, true, false); | |
1421 | ||
b5b3e36a DJ |
1422 | #ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION |
1423 | c_register_pragma_with_expansion (0, "pack", handle_pragma_pack); | |
1424 | #else | |
c58b209a | 1425 | c_register_pragma (0, "pack", handle_pragma_pack); |
0e5921e8 | 1426 | #endif |
c58b209a | 1427 | c_register_pragma (0, "weak", handle_pragma_weak); |
d7afec4b | 1428 | c_register_pragma ("GCC", "visibility", handle_pragma_visibility); |
84b8b0e0 | 1429 | |
79cf5994 | 1430 | c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic); |
5779e713 | 1431 | c_register_pragma ("GCC", "target", handle_pragma_target); |
ab442df7 | 1432 | c_register_pragma ("GCC", "optimize", handle_pragma_optimize); |
5779e713 MM |
1433 | c_register_pragma ("GCC", "push_options", handle_pragma_push_options); |
1434 | c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options); | |
1435 | c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options); | |
79cf5994 | 1436 | |
6ec637a4 JJ |
1437 | c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64", |
1438 | handle_pragma_float_const_decimal64); | |
1439 | ||
dfb43cd5 PV |
1440 | c_register_pragma_with_expansion (0, "redefine_extname", |
1441 | handle_pragma_redefine_extname); | |
41c64394 | 1442 | |
0d48657d SB |
1443 | c_register_pragma_with_expansion (0, "message", handle_pragma_message); |
1444 | ||
8b97c5f8 | 1445 | #ifdef REGISTER_TARGET_PRAGMAS |
c58b209a | 1446 | REGISTER_TARGET_PRAGMAS (); |
8b97c5f8 | 1447 | #endif |
7ac8318c BS |
1448 | |
1449 | /* Allow plugins to register their own pragmas. */ | |
1450 | invoke_plugin_callbacks (PLUGIN_PRAGMAS, NULL); | |
568767a6 | 1451 | } |
e2500fed | 1452 | |
39dabefd | 1453 | #include "gt-c-family-c-pragma.h" |