1 /* Language-dependent hooks for LTO.
2 Copyright (C) 2009-2020 Free Software Foundation, Inc.
3 Contributed by CodeSourcery, 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 "target.h"
25 #include "function.h"
26 #include "basic-block.h"
27 #include "tree.h"
28 #include "gimple.h"
29 #include "stringpool.h"
30 #include "diagnostic-core.h"
31 #include "stor-layout.h"
32 #include "langhooks.h"
33 #include "langhooks-def.h"
34 #include "debug.h"
35 #include "lto-tree.h"
36 #include "lto.h"
37 #include "lto-common.h"
38 #include "stringpool.h"
39 #include "attribs.h"
40
41 /* LTO specific dumps. */
42 int lto_link_dump_id, decl_merge_dump_id, partition_dump_id;
43
44 static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *);
45 static tree handle_leaf_attribute (tree *, tree, tree, int, bool *);
46 static tree handle_const_attribute (tree *, tree, tree, int, bool *);
47 static tree handle_malloc_attribute (tree *, tree, tree, int, bool *);
48 static tree handle_pure_attribute (tree *, tree, tree, int, bool *);
49 static tree handle_novops_attribute (tree *, tree, tree, int, bool *);
50 static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *);
51 static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *);
52 static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *);
53 static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *);
54 static tree handle_transaction_pure_attribute (tree *, tree, tree, int, bool *);
55 static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *);
56 static tree handle_patchable_function_entry_attribute (tree *, tree, tree,
57 int, bool *);
58 static tree ignore_attribute (tree *, tree, tree, int, bool *);
59
60 static tree handle_format_attribute (tree *, tree, tree, int, bool *);
61 static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *);
62 static tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
63
64 /* Helper to define attribute exclusions. */
65 #define ATTR_EXCL(name, function, type, variable) \
66 { name, function, type, variable }
67
68 /* Define attributes that are mutually exclusive with one another. */
69 static const struct attribute_spec::exclusions attr_noreturn_exclusions[] =
70 {
71 ATTR_EXCL ("noreturn", true, true, true),
72 ATTR_EXCL ("alloc_align", true, true, true),
73 ATTR_EXCL ("alloc_size", true, true, true),
74 ATTR_EXCL ("const", true, true, true),
75 ATTR_EXCL ("malloc", true, true, true),
76 ATTR_EXCL ("pure", true, true, true),
77 ATTR_EXCL ("returns_twice", true, true, true),
78 ATTR_EXCL ("warn_unused_result", true, true, true),
79 ATTR_EXCL (NULL, false, false, false),
80 };
81
82 static const struct attribute_spec::exclusions attr_returns_twice_exclusions[] =
83 {
84 ATTR_EXCL ("noreturn", true, true, true),
85 ATTR_EXCL (NULL, false, false, false),
86 };
87
88 static const struct attribute_spec::exclusions attr_const_pure_exclusions[] =
89 {
90 ATTR_EXCL ("const", true, true, true),
91 ATTR_EXCL ("noreturn", true, true, true),
92 ATTR_EXCL ("pure", true, true, true),
93 ATTR_EXCL (NULL, false, false, false)
94 };
95
96 /* Table of machine-independent attributes supported in GIMPLE. */
97 const struct attribute_spec lto_attribute_table[] =
98 {
99 /* { name, min_len, max_len, decl_req, type_req, fn_type_req,
100 affects_type_identity, handler, exclude } */
101 { "noreturn", 0, 0, true, false, false, false,
102 handle_noreturn_attribute,
103 attr_noreturn_exclusions },
104 { "leaf", 0, 0, true, false, false, false,
105 handle_leaf_attribute, NULL },
106 /* The same comments as for noreturn attributes apply to const ones. */
107 { "const", 0, 0, true, false, false, false,
108 handle_const_attribute,
109 attr_const_pure_exclusions },
110 { "malloc", 0, 0, true, false, false, false,
111 handle_malloc_attribute, NULL },
112 { "pure", 0, 0, true, false, false, false,
113 handle_pure_attribute,
114 attr_const_pure_exclusions },
115 { "no vops", 0, 0, true, false, false, false,
116 handle_novops_attribute, NULL },
117 { "nonnull", 0, -1, false, true, true, false,
118 handle_nonnull_attribute, NULL },
119 { "nothrow", 0, 0, true, false, false, false,
120 handle_nothrow_attribute, NULL },
121 { "patchable_function_entry", 1, 2, true, false, false, false,
122 handle_patchable_function_entry_attribute,
123 NULL },
124 { "returns_twice", 0, 0, true, false, false, false,
125 handle_returns_twice_attribute,
126 attr_returns_twice_exclusions },
127 { "sentinel", 0, 1, false, true, true, false,
128 handle_sentinel_attribute, NULL },
129 { "type generic", 0, 0, false, true, true, false,
130 handle_type_generic_attribute, NULL },
131 { "fn spec", 1, 1, false, true, true, false,
132 handle_fnspec_attribute, NULL },
133 { "transaction_pure", 0, 0, false, true, true, false,
134 handle_transaction_pure_attribute, NULL },
135 /* For internal use only. The leading '*' both prevents its usage in
136 source code and signals that it may be overridden by machine tables. */
137 { "*tm regparm", 0, 0, false, true, true, false,
138 ignore_attribute, NULL },
139 { NULL, 0, 0, false, false, false, false, NULL, NULL }
140 };
141
142 /* Give the specifications for the format attributes, used by C and all
143 descendants. */
144
145 const struct attribute_spec lto_format_attribute_table[] =
146 {
147 /* { name, min_len, max_len, decl_req, type_req, fn_type_req,
148 affects_type_identity, handler, exclude } */
149 { "format", 3, 3, false, true, true, false,
150 handle_format_attribute, NULL },
151 { "format_arg", 1, 1, false, true, true, false,
152 handle_format_arg_attribute, NULL },
153 { NULL, 0, 0, false, false, false, false, NULL, NULL }
154 };
155
156 enum built_in_attribute
157 {
158 #define DEF_ATTR_NULL_TREE(ENUM) ENUM,
159 #define DEF_ATTR_INT(ENUM, VALUE) ENUM,
160 #define DEF_ATTR_STRING(ENUM, VALUE) ENUM,
161 #define DEF_ATTR_IDENT(ENUM, STRING) ENUM,
162 #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM,
163 #include "builtin-attrs.def"
164 #undef DEF_ATTR_NULL_TREE
165 #undef DEF_ATTR_INT
166 #undef DEF_ATTR_STRING
167 #undef DEF_ATTR_IDENT
168 #undef DEF_ATTR_TREE_LIST
169 ATTR_LAST
170 };
171
172 static GTY(()) tree built_in_attributes[(int) ATTR_LAST];
173
174 /* Builtin types. */
175
176 enum lto_builtin_type
177 {
178 #define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME,
179 #define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME,
180 #define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME,
181 #define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME,
182 #define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
183 #define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME,
184 #define DEF_FUNCTION_TYPE_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) NAME,
185 #define DEF_FUNCTION_TYPE_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
186 ARG6) NAME,
187 #define DEF_FUNCTION_TYPE_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
188 ARG6, ARG7) NAME,
189 #define DEF_FUNCTION_TYPE_8(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
190 ARG6, ARG7, ARG8) NAME,
191 #define DEF_FUNCTION_TYPE_9(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
192 ARG6, ARG7, ARG8, ARG9) NAME,
193 #define DEF_FUNCTION_TYPE_10(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
194 ARG6, ARG7, ARG8, ARG9, ARG10) NAME,
195 #define DEF_FUNCTION_TYPE_11(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
196 ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) NAME,
197 #define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME,
198 #define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME,
199 #define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME,
200 #define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
201 #define DEF_FUNCTION_TYPE_VAR_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME,
202 #define DEF_FUNCTION_TYPE_VAR_5(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG6) \
203 NAME,
204 #define DEF_FUNCTION_TYPE_VAR_6(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
205 ARG6) NAME,
206 #define DEF_FUNCTION_TYPE_VAR_7(NAME, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
207 ARG6, ARG7) NAME,
208 #define DEF_POINTER_TYPE(NAME, TYPE) NAME,
209 #include "builtin-types.def"
210 #undef DEF_PRIMITIVE_TYPE
211 #undef DEF_FUNCTION_TYPE_0
212 #undef DEF_FUNCTION_TYPE_1
213 #undef DEF_FUNCTION_TYPE_2
214 #undef DEF_FUNCTION_TYPE_3
215 #undef DEF_FUNCTION_TYPE_4
216 #undef DEF_FUNCTION_TYPE_5
217 #undef DEF_FUNCTION_TYPE_6
218 #undef DEF_FUNCTION_TYPE_7
219 #undef DEF_FUNCTION_TYPE_8
220 #undef DEF_FUNCTION_TYPE_9
221 #undef DEF_FUNCTION_TYPE_10
222 #undef DEF_FUNCTION_TYPE_11
223 #undef DEF_FUNCTION_TYPE_VAR_0
224 #undef DEF_FUNCTION_TYPE_VAR_1
225 #undef DEF_FUNCTION_TYPE_VAR_2
226 #undef DEF_FUNCTION_TYPE_VAR_3
227 #undef DEF_FUNCTION_TYPE_VAR_4
228 #undef DEF_FUNCTION_TYPE_VAR_5
229 #undef DEF_FUNCTION_TYPE_VAR_6
230 #undef DEF_FUNCTION_TYPE_VAR_7
231 #undef DEF_POINTER_TYPE
232 BT_LAST
233 };
234
235 typedef enum lto_builtin_type builtin_type;
236
237 static GTY(()) tree builtin_types[(int) BT_LAST + 1];
238
239 static GTY(()) tree string_type_node;
240 static GTY(()) tree const_string_type_node;
241 static GTY(()) tree wint_type_node;
242 static GTY(()) tree intmax_type_node;
243 static GTY(()) tree uintmax_type_node;
244 static GTY(()) tree signed_size_type_node;
245
246 /* Flags needed to process builtins.def. */
247 int flag_isoc94;
248 int flag_isoc99;
249 int flag_isoc11;
250 int flag_isoc2x;
251
252 /* Attribute handlers. */
253
254 /* Handle a "noreturn" attribute; arguments as in
255 struct attribute_spec.handler. */
256
257 static tree
handle_noreturn_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))258 handle_noreturn_attribute (tree *node, tree ARG_UNUSED (name),
259 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
260 bool * ARG_UNUSED (no_add_attrs))
261 {
262 tree type = TREE_TYPE (*node);
263
264 if (TREE_CODE (*node) == FUNCTION_DECL)
265 TREE_THIS_VOLATILE (*node) = 1;
266 else if (TREE_CODE (type) == POINTER_TYPE
267 && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
268 TREE_TYPE (*node)
269 = build_pointer_type
270 (build_type_variant (TREE_TYPE (type),
271 TYPE_READONLY (TREE_TYPE (type)), 1));
272 else
273 gcc_unreachable ();
274
275 return NULL_TREE;
276 }
277
278 /* Handle a "leaf" attribute; arguments as in
279 struct attribute_spec.handler. */
280
281 static tree
handle_leaf_attribute(tree * node,tree name,tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * no_add_attrs)282 handle_leaf_attribute (tree *node, tree name,
283 tree ARG_UNUSED (args),
284 int ARG_UNUSED (flags), bool *no_add_attrs)
285 {
286 if (TREE_CODE (*node) != FUNCTION_DECL)
287 {
288 warning (OPT_Wattributes, "%qE attribute ignored", name);
289 *no_add_attrs = true;
290 }
291 if (!TREE_PUBLIC (*node))
292 {
293 warning (OPT_Wattributes, "%qE attribute has no effect on unit local functions", name);
294 *no_add_attrs = true;
295 }
296
297 return NULL_TREE;
298 }
299
300 /* Handle a "const" attribute; arguments as in
301 struct attribute_spec.handler. */
302
303 static tree
handle_const_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))304 handle_const_attribute (tree *node, tree ARG_UNUSED (name),
305 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
306 bool * ARG_UNUSED (no_add_attrs))
307 {
308 if (TREE_CODE (*node) != FUNCTION_DECL
309 || !fndecl_built_in_p (*node))
310 inform (UNKNOWN_LOCATION, "%s:%s: %E: %E", __FILE__, __func__, *node, name);
311
312 tree type = TREE_TYPE (*node);
313
314 /* See FIXME comment on noreturn in c_common_attribute_table. */
315 if (TREE_CODE (*node) == FUNCTION_DECL)
316 TREE_READONLY (*node) = 1;
317 else if (TREE_CODE (type) == POINTER_TYPE
318 && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
319 TREE_TYPE (*node)
320 = build_pointer_type
321 (build_type_variant (TREE_TYPE (type), 1,
322 TREE_THIS_VOLATILE (TREE_TYPE (type))));
323 else
324 gcc_unreachable ();
325
326 return NULL_TREE;
327 }
328
329
330 /* Handle a "malloc" attribute; arguments as in
331 struct attribute_spec.handler. */
332
333 static tree
handle_malloc_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))334 handle_malloc_attribute (tree *node, tree ARG_UNUSED (name),
335 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
336 bool * ARG_UNUSED (no_add_attrs))
337 {
338 if (TREE_CODE (*node) == FUNCTION_DECL
339 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node))))
340 DECL_IS_MALLOC (*node) = 1;
341 else
342 gcc_unreachable ();
343
344 return NULL_TREE;
345 }
346
347
348 /* Handle a "pure" attribute; arguments as in
349 struct attribute_spec.handler. */
350
351 static tree
handle_pure_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))352 handle_pure_attribute (tree *node, tree ARG_UNUSED (name),
353 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
354 bool * ARG_UNUSED (no_add_attrs))
355 {
356 if (TREE_CODE (*node) == FUNCTION_DECL)
357 DECL_PURE_P (*node) = 1;
358 else
359 gcc_unreachable ();
360
361 return NULL_TREE;
362 }
363
364
365 /* Handle a "no vops" attribute; arguments as in
366 struct attribute_spec.handler. */
367
368 static tree
handle_novops_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))369 handle_novops_attribute (tree *node, tree ARG_UNUSED (name),
370 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
371 bool *ARG_UNUSED (no_add_attrs))
372 {
373 gcc_assert (TREE_CODE (*node) == FUNCTION_DECL);
374 DECL_IS_NOVOPS (*node) = 1;
375 return NULL_TREE;
376 }
377
378
379 /* Helper for nonnull attribute handling; fetch the operand number
380 from the attribute argument list. */
381
382 static bool
get_nonnull_operand(tree arg_num_expr,unsigned HOST_WIDE_INT * valp)383 get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp)
384 {
385 /* Verify the arg number is a constant. */
386 if (!tree_fits_uhwi_p (arg_num_expr))
387 return false;
388
389 *valp = TREE_INT_CST_LOW (arg_num_expr);
390 return true;
391 }
392
393 /* Handle the "nonnull" attribute. */
394
395 static tree
handle_nonnull_attribute(tree * node,tree ARG_UNUSED (name),tree args,int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))396 handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name),
397 tree args, int ARG_UNUSED (flags),
398 bool * ARG_UNUSED (no_add_attrs))
399 {
400 tree type = *node;
401
402 /* If no arguments are specified, all pointer arguments should be
403 non-null. Verify a full prototype is given so that the arguments
404 will have the correct types when we actually check them later.
405 Avoid diagnosing type-generic built-ins since those have no
406 prototype. */
407 if (!args)
408 {
409 gcc_assert (prototype_p (type)
410 || !TYPE_ATTRIBUTES (type)
411 || lookup_attribute ("type generic", TYPE_ATTRIBUTES (type)));
412
413 return NULL_TREE;
414 }
415
416 /* Argument list specified. Verify that each argument number references
417 a pointer argument. */
418 for (; args; args = TREE_CHAIN (args))
419 {
420 tree argument;
421 unsigned HOST_WIDE_INT arg_num = 0, ck_num;
422
423 if (!get_nonnull_operand (TREE_VALUE (args), &arg_num))
424 gcc_unreachable ();
425
426 argument = TYPE_ARG_TYPES (type);
427 if (argument)
428 {
429 for (ck_num = 1; ; ck_num++)
430 {
431 if (!argument || ck_num == arg_num)
432 break;
433 argument = TREE_CHAIN (argument);
434 }
435
436 gcc_assert (argument
437 && TREE_CODE (TREE_VALUE (argument)) == POINTER_TYPE);
438 }
439 }
440
441 return NULL_TREE;
442 }
443
444
445 /* Handle a "nothrow" attribute; arguments as in
446 struct attribute_spec.handler. */
447
448 static tree
handle_nothrow_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))449 handle_nothrow_attribute (tree *node, tree ARG_UNUSED (name),
450 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
451 bool * ARG_UNUSED (no_add_attrs))
452 {
453 if (TREE_CODE (*node) == FUNCTION_DECL)
454 TREE_NOTHROW (*node) = 1;
455 else
456 gcc_unreachable ();
457
458 return NULL_TREE;
459 }
460
461
462 /* Handle a "sentinel" attribute. */
463
464 static tree
handle_sentinel_attribute(tree * node,tree ARG_UNUSED (name),tree args,int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))465 handle_sentinel_attribute (tree *node, tree ARG_UNUSED (name), tree args,
466 int ARG_UNUSED (flags),
467 bool * ARG_UNUSED (no_add_attrs))
468 {
469 gcc_assert (stdarg_p (*node));
470
471 if (args)
472 {
473 tree position = TREE_VALUE (args);
474 gcc_assert (TREE_CODE (position) == INTEGER_CST);
475 if (tree_int_cst_lt (position, integer_zero_node))
476 gcc_unreachable ();
477 }
478
479 return NULL_TREE;
480 }
481
482 /* Handle a "type_generic" attribute. */
483
484 static tree
handle_type_generic_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))485 handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name),
486 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
487 bool * ARG_UNUSED (no_add_attrs))
488 {
489 /* Ensure we have a function type. */
490 gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE);
491
492 /* Ensure we have a variadic function. */
493 gcc_assert (!prototype_p (*node) || stdarg_p (*node));
494
495 return NULL_TREE;
496 }
497
498 /* Handle a "transaction_pure" attribute. */
499
500 static tree
handle_transaction_pure_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))501 handle_transaction_pure_attribute (tree *node, tree ARG_UNUSED (name),
502 tree ARG_UNUSED (args),
503 int ARG_UNUSED (flags),
504 bool * ARG_UNUSED (no_add_attrs))
505 {
506 /* Ensure we have a function type. */
507 gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE);
508
509 return NULL_TREE;
510 }
511
512 /* Handle a "returns_twice" attribute. */
513
514 static tree
handle_returns_twice_attribute(tree * node,tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * ARG_UNUSED (no_add_attrs))515 handle_returns_twice_attribute (tree *node, tree ARG_UNUSED (name),
516 tree ARG_UNUSED (args),
517 int ARG_UNUSED (flags),
518 bool * ARG_UNUSED (no_add_attrs))
519 {
520 gcc_assert (TREE_CODE (*node) == FUNCTION_DECL);
521
522 DECL_IS_RETURNS_TWICE (*node) = 1;
523
524 return NULL_TREE;
525 }
526
527 static tree
handle_patchable_function_entry_attribute(tree *,tree,tree,int,bool *)528 handle_patchable_function_entry_attribute (tree *, tree, tree, int, bool *)
529 {
530 /* Nothing to be done here. */
531 return NULL_TREE;
532 }
533
534 /* Ignore the given attribute. Used when this attribute may be usefully
535 overridden by the target, but is not used generically. */
536
537 static tree
ignore_attribute(tree * ARG_UNUSED (node),tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * no_add_attrs)538 ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name),
539 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
540 bool *no_add_attrs)
541 {
542 *no_add_attrs = true;
543 return NULL_TREE;
544 }
545
546 /* Handle a "format" attribute; arguments as in
547 struct attribute_spec.handler. */
548
549 static tree
handle_format_attribute(tree * ARG_UNUSED (node),tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * no_add_attrs)550 handle_format_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name),
551 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
552 bool *no_add_attrs)
553 {
554 *no_add_attrs = true;
555 return NULL_TREE;
556 }
557
558
559 /* Handle a "format_arg" attribute; arguments as in
560 struct attribute_spec.handler. */
561
562 tree
handle_format_arg_attribute(tree * ARG_UNUSED (node),tree ARG_UNUSED (name),tree ARG_UNUSED (args),int ARG_UNUSED (flags),bool * no_add_attrs)563 handle_format_arg_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name),
564 tree ARG_UNUSED (args), int ARG_UNUSED (flags),
565 bool *no_add_attrs)
566 {
567 *no_add_attrs = true;
568 return NULL_TREE;
569 }
570
571
572 /* Handle a "fn spec" attribute; arguments as in
573 struct attribute_spec.handler. */
574
575 static tree
handle_fnspec_attribute(tree * node ATTRIBUTE_UNUSED,tree ARG_UNUSED (name),tree args,int ARG_UNUSED (flags),bool * no_add_attrs ATTRIBUTE_UNUSED)576 handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name),
577 tree args, int ARG_UNUSED (flags),
578 bool *no_add_attrs ATTRIBUTE_UNUSED)
579 {
580 gcc_assert (args
581 && TREE_CODE (TREE_VALUE (args)) == STRING_CST
582 && !TREE_CHAIN (args));
583 return NULL_TREE;
584 }
585
586 /* Cribbed from c-common.c. */
587
588 static void
def_fn_type(builtin_type def,builtin_type ret,bool var,int n,...)589 def_fn_type (builtin_type def, builtin_type ret, bool var, int n, ...)
590 {
591 tree t;
592 tree *args = XALLOCAVEC (tree, n);
593 va_list list;
594 int i;
595 bool err = false;
596
597 va_start (list, n);
598 for (i = 0; i < n; ++i)
599 {
600 builtin_type a = (builtin_type) va_arg (list, int);
601 t = builtin_types[a];
602 if (t == error_mark_node)
603 err = true;
604 args[i] = t;
605 }
606 va_end (list);
607
608 t = builtin_types[ret];
609 if (err)
610 t = error_mark_node;
611 if (t == error_mark_node)
612 ;
613 else if (var)
614 t = build_varargs_function_type_array (t, n, args);
615 else
616 t = build_function_type_array (t, n, args);
617
618 builtin_types[def] = t;
619 }
620
621 /* Used to help initialize the builtin-types.def table. When a type of
622 the correct size doesn't exist, use error_mark_node instead of NULL.
623 The later results in segfaults even when a decl using the type doesn't
624 get invoked. */
625
626 static tree
builtin_type_for_size(int size,bool unsignedp)627 builtin_type_for_size (int size, bool unsignedp)
628 {
629 tree type = lang_hooks.types.type_for_size (size, unsignedp);
630 return type ? type : error_mark_node;
631 }
632
633 /* Support for DEF_BUILTIN. */
634
635 static void
def_builtin_1(enum built_in_function fncode,const char * name,enum built_in_class fnclass,tree fntype,tree libtype,bool both_p,bool fallback_p,bool nonansi_p,tree fnattrs,bool implicit_p)636 def_builtin_1 (enum built_in_function fncode, const char *name,
637 enum built_in_class fnclass, tree fntype, tree libtype,
638 bool both_p, bool fallback_p, bool nonansi_p,
639 tree fnattrs, bool implicit_p)
640 {
641 tree decl;
642 const char *libname;
643
644 if (fntype == error_mark_node)
645 return;
646
647 libname = name + strlen ("__builtin_");
648 decl = add_builtin_function (name, fntype, fncode, fnclass,
649 (fallback_p ? libname : NULL),
650 fnattrs);
651
652 if (both_p
653 && !flag_no_builtin
654 && !(nonansi_p && flag_no_nonansi_builtin))
655 add_builtin_function (libname, libtype, fncode, fnclass,
656 NULL, fnattrs);
657
658 set_builtin_decl (fncode, decl, implicit_p);
659 }
660
661
662 /* Initialize the attribute table for all the supported builtins. */
663
664 static void
lto_init_attributes(void)665 lto_init_attributes (void)
666 {
667 /* Fill in the built_in_attributes array. */
668 #define DEF_ATTR_NULL_TREE(ENUM) \
669 built_in_attributes[(int) ENUM] = NULL_TREE;
670 #define DEF_ATTR_INT(ENUM, VALUE) \
671 built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE);
672 #define DEF_ATTR_STRING(ENUM, VALUE) \
673 built_in_attributes[(int) ENUM] = build_string (strlen (VALUE), VALUE);
674 #define DEF_ATTR_IDENT(ENUM, STRING) \
675 built_in_attributes[(int) ENUM] = get_identifier (STRING);
676 #define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \
677 built_in_attributes[(int) ENUM] \
678 = tree_cons (built_in_attributes[(int) PURPOSE], \
679 built_in_attributes[(int) VALUE], \
680 built_in_attributes[(int) CHAIN]);
681 #include "builtin-attrs.def"
682 #undef DEF_ATTR_NULL_TREE
683 #undef DEF_ATTR_INT
684 #undef DEF_ATTR_STRING
685 #undef DEF_ATTR_IDENT
686 #undef DEF_ATTR_TREE_LIST
687 }
688
689 /* Create builtin types and functions. VA_LIST_REF_TYPE_NODE and
690 VA_LIST_ARG_TYPE_NODE are used in builtin-types.def. */
691
692 static void
lto_define_builtins(tree va_list_ref_type_node ATTRIBUTE_UNUSED,tree va_list_arg_type_node ATTRIBUTE_UNUSED)693 lto_define_builtins (tree va_list_ref_type_node ATTRIBUTE_UNUSED,
694 tree va_list_arg_type_node ATTRIBUTE_UNUSED)
695 {
696 #define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \
697 builtin_types[ENUM] = VALUE;
698 #define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \
699 def_fn_type (ENUM, RETURN, 0, 0);
700 #define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \
701 def_fn_type (ENUM, RETURN, 0, 1, ARG1);
702 #define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \
703 def_fn_type (ENUM, RETURN, 0, 2, ARG1, ARG2);
704 #define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
705 def_fn_type (ENUM, RETURN, 0, 3, ARG1, ARG2, ARG3);
706 #define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \
707 def_fn_type (ENUM, RETURN, 0, 4, ARG1, ARG2, ARG3, ARG4);
708 #define DEF_FUNCTION_TYPE_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \
709 def_fn_type (ENUM, RETURN, 0, 5, ARG1, ARG2, ARG3, ARG4, ARG5);
710 #define DEF_FUNCTION_TYPE_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
711 ARG6) \
712 def_fn_type (ENUM, RETURN, 0, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6);
713 #define DEF_FUNCTION_TYPE_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
714 ARG6, ARG7) \
715 def_fn_type (ENUM, RETURN, 0, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7);
716 #define DEF_FUNCTION_TYPE_8(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
717 ARG6, ARG7, ARG8) \
718 def_fn_type (ENUM, RETURN, 0, 8, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \
719 ARG7, ARG8);
720 #define DEF_FUNCTION_TYPE_9(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
721 ARG6, ARG7, ARG8, ARG9) \
722 def_fn_type (ENUM, RETURN, 0, 9, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \
723 ARG7, ARG8, ARG9);
724 #define DEF_FUNCTION_TYPE_10(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
725 ARG6, ARG7, ARG8, ARG9, ARG10) \
726 def_fn_type (ENUM, RETURN, 0, 10, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \
727 ARG7, ARG8, ARG9, ARG10);
728 #define DEF_FUNCTION_TYPE_11(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
729 ARG6, ARG7, ARG8, ARG9, ARG10, ARG11) \
730 def_fn_type (ENUM, RETURN, 0, 11, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, \
731 ARG7, ARG8, ARG9, ARG10, ARG11);
732 #define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \
733 def_fn_type (ENUM, RETURN, 1, 0);
734 #define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \
735 def_fn_type (ENUM, RETURN, 1, 1, ARG1);
736 #define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \
737 def_fn_type (ENUM, RETURN, 1, 2, ARG1, ARG2);
738 #define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
739 def_fn_type (ENUM, RETURN, 1, 3, ARG1, ARG2, ARG3);
740 #define DEF_FUNCTION_TYPE_VAR_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \
741 def_fn_type (ENUM, RETURN, 1, 4, ARG1, ARG2, ARG3, ARG4);
742 #define DEF_FUNCTION_TYPE_VAR_5(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5) \
743 def_fn_type (ENUM, RETURN, 1, 5, ARG1, ARG2, ARG3, ARG4, ARG5);
744 #define DEF_FUNCTION_TYPE_VAR_6(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
745 ARG6) \
746 def_fn_type (ENUM, RETURN, 1, 6, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6);
747 #define DEF_FUNCTION_TYPE_VAR_7(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4, ARG5, \
748 ARG6, ARG7) \
749 def_fn_type (ENUM, RETURN, 1, 7, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7);
750 #define DEF_POINTER_TYPE(ENUM, TYPE) \
751 builtin_types[(int) ENUM] = build_pointer_type (builtin_types[(int) TYPE]);
752
753 #include "builtin-types.def"
754
755 #undef DEF_PRIMITIVE_TYPE
756 #undef DEF_FUNCTION_TYPE_0
757 #undef DEF_FUNCTION_TYPE_1
758 #undef DEF_FUNCTION_TYPE_2
759 #undef DEF_FUNCTION_TYPE_3
760 #undef DEF_FUNCTION_TYPE_4
761 #undef DEF_FUNCTION_TYPE_5
762 #undef DEF_FUNCTION_TYPE_6
763 #undef DEF_FUNCTION_TYPE_7
764 #undef DEF_FUNCTION_TYPE_8
765 #undef DEF_FUNCTION_TYPE_9
766 #undef DEF_FUNCTION_TYPE_10
767 #undef DEF_FUNCTION_TYPE_11
768 #undef DEF_FUNCTION_TYPE_VAR_0
769 #undef DEF_FUNCTION_TYPE_VAR_1
770 #undef DEF_FUNCTION_TYPE_VAR_2
771 #undef DEF_FUNCTION_TYPE_VAR_3
772 #undef DEF_FUNCTION_TYPE_VAR_4
773 #undef DEF_FUNCTION_TYPE_VAR_5
774 #undef DEF_FUNCTION_TYPE_VAR_6
775 #undef DEF_FUNCTION_TYPE_VAR_7
776 #undef DEF_POINTER_TYPE
777 builtin_types[(int) BT_LAST] = NULL_TREE;
778
779 lto_init_attributes ();
780
781 #define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P, FALLBACK_P,\
782 NONANSI_P, ATTRS, IMPLICIT, COND) \
783 if (NAME && COND) \
784 def_builtin_1 (ENUM, NAME, CLASS, builtin_types[(int) TYPE], \
785 builtin_types[(int) LIBTYPE], BOTH_P, FALLBACK_P, \
786 NONANSI_P, built_in_attributes[(int) ATTRS], IMPLICIT);
787 #include "builtins.def"
788 }
789
790 static GTY(()) tree registered_builtin_types;
791
792 /* Language hooks. */
793
794 static bool
lto_complain_wrong_lang_p(const struct cl_option * option ATTRIBUTE_UNUSED)795 lto_complain_wrong_lang_p (const struct cl_option *option ATTRIBUTE_UNUSED)
796 {
797 /* The LTO front end inherits all the options from the first front
798 end that was used. However, not all the original front end
799 options make sense in LTO.
800
801 A real solution would be to filter this in collect2, but collect2
802 does not have access to all the option attributes to know what to
803 filter. So, in lto1 we silently accept inherited flags and do
804 nothing about it. */
805 return false;
806 }
807
808 static void
lto_init_options_struct(struct gcc_options * opts)809 lto_init_options_struct (struct gcc_options *opts)
810 {
811 /* By default, C99-like requirements for complex multiply and divide.
812 ??? Until the complex method is encoded in the IL this is the only
813 safe choice. This will pessimize Fortran code with LTO unless
814 people specify a complex method manually or use -ffast-math. */
815 opts->x_flag_complex_method = 2;
816 }
817
818 /* Handle command-line option SCODE. If the option takes an argument, it is
819 stored in ARG, which is otherwise NULL. VALUE holds either a numerical
820 argument or a binary value indicating whether the positive or negative form
821 of the option was supplied. */
822
823 const char *resolution_file_name;
824 static bool
lto_handle_option(size_t scode,const char * arg,HOST_WIDE_INT value ATTRIBUTE_UNUSED,int kind ATTRIBUTE_UNUSED,location_t loc ATTRIBUTE_UNUSED,const struct cl_option_handlers * handlers ATTRIBUTE_UNUSED)825 lto_handle_option (size_t scode, const char *arg,
826 HOST_WIDE_INT value ATTRIBUTE_UNUSED,
827 int kind ATTRIBUTE_UNUSED,
828 location_t loc ATTRIBUTE_UNUSED,
829 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
830 {
831 enum opt_code code = (enum opt_code) scode;
832 bool result = true;
833
834 switch (code)
835 {
836 case OPT_fresolution_:
837 resolution_file_name = arg;
838 break;
839
840 case OPT_Wabi:
841 warn_psabi = value;
842 break;
843
844 case OPT_fwpa:
845 flag_wpa = value ? "" : NULL;
846 break;
847
848 default:
849 break;
850 }
851
852 return result;
853 }
854
855 /* Perform post-option processing. Does additional initialization based on
856 command-line options. PFILENAME is the main input filename. Returns false
857 to enable subsequent back-end initialization. */
858
859 static bool
lto_post_options(const char ** pfilename ATTRIBUTE_UNUSED)860 lto_post_options (const char **pfilename ATTRIBUTE_UNUSED)
861 {
862 /* -fltrans and -fwpa are mutually exclusive. Check for that here. */
863 if (flag_wpa && flag_ltrans)
864 error ("%<-fwpa%> and %<-fltrans%> are mutually exclusive");
865
866 if (flag_ltrans)
867 {
868 flag_generate_lto = 0;
869
870 /* During LTRANS, we are not looking at the whole program, only
871 a subset of the whole callgraph. */
872 flag_whole_program = 0;
873 }
874
875 if (flag_wpa)
876 flag_generate_lto = 1;
877
878 /* Initialize the codegen flags according to the output type. */
879 switch (flag_lto_linker_output)
880 {
881 case LTO_LINKER_OUTPUT_REL: /* .o: incremental link producing LTO IL */
882 /* Configure compiler same way as normal frontend would do with -flto:
883 this way we read the trees (declarations & types), symbol table,
884 optimization summaries and link them. Subsequently we output new LTO
885 file. */
886 flag_lto = "";
887 flag_incremental_link = INCREMENTAL_LINK_LTO;
888 flag_whole_program = 0;
889 flag_wpa = 0;
890 flag_generate_lto = 1;
891 /* It would be cool to produce .o file directly, but our current
892 simple objects does not contain the lto symbol markers. Go the slow
893 way through the asm file. */
894 lang_hooks.lto.begin_section = lhd_begin_section;
895 lang_hooks.lto.append_data = lhd_append_data;
896 lang_hooks.lto.end_section = lhd_end_section;
897 if (flag_ltrans)
898 error ("%<-flinker-output=rel%> and %<-fltrans%> are mutually "
899 "exclussive");
900 break;
901
902 case LTO_LINKER_OUTPUT_NOLTOREL: /* .o: incremental link producing asm */
903 flag_whole_program = 0;
904 flag_incremental_link = INCREMENTAL_LINK_NOLTO;
905 break;
906
907 case LTO_LINKER_OUTPUT_DYN: /* .so: PID library */
908 /* On some targets, like i386 it makes sense to build PIC library wihout
909 -fpic for performance reasons. So no need to adjust flags. */
910 break;
911
912 case LTO_LINKER_OUTPUT_PIE: /* PIE binary */
913 /* If -fPIC or -fPIE was used at compile time, be sure that
914 flag_pie is 2. */
915 flag_pie = MAX (flag_pie, flag_pic);
916 flag_pic = flag_pie;
917 flag_shlib = 0;
918 break;
919
920 case LTO_LINKER_OUTPUT_EXEC: /* Normal executable */
921 flag_pic = 0;
922 flag_pie = 0;
923 flag_shlib = 0;
924 break;
925
926 case LTO_LINKER_OUTPUT_UNKNOWN:
927 break;
928 }
929
930 /* Excess precision other than "fast" requires front-end
931 support. */
932 if (flag_excess_precision == EXCESS_PRECISION_DEFAULT)
933 flag_excess_precision = EXCESS_PRECISION_FAST;
934
935 /* When partitioning, we can tear appart STRING_CSTs uses from the same
936 TU into multiple partitions. Without constant merging the constants
937 might not be equal at runtime. See PR50199. */
938 if (!flag_merge_constants)
939 flag_merge_constants = 1;
940
941 /* Initialize the compiler back end. */
942 return false;
943 }
944
945 /* Return a data type that has machine mode MODE.
946 If the mode is an integer,
947 then UNSIGNEDP selects between signed and unsigned types.
948 If the mode is a fixed-point mode,
949 then UNSIGNEDP selects between saturating and nonsaturating types. */
950
951 static tree
lto_type_for_mode(machine_mode mode,int unsigned_p)952 lto_type_for_mode (machine_mode mode, int unsigned_p)
953 {
954 tree t;
955 int i;
956
957 if (mode == TYPE_MODE (integer_type_node))
958 return unsigned_p ? unsigned_type_node : integer_type_node;
959
960 if (mode == TYPE_MODE (signed_char_type_node))
961 return unsigned_p ? unsigned_char_type_node : signed_char_type_node;
962
963 if (mode == TYPE_MODE (short_integer_type_node))
964 return unsigned_p ? short_unsigned_type_node : short_integer_type_node;
965
966 if (mode == TYPE_MODE (long_integer_type_node))
967 return unsigned_p ? long_unsigned_type_node : long_integer_type_node;
968
969 if (mode == TYPE_MODE (long_long_integer_type_node))
970 return unsigned_p ? long_long_unsigned_type_node : long_long_integer_type_node;
971
972 for (i = 0; i < NUM_INT_N_ENTS; i ++)
973 if (int_n_enabled_p[i]
974 && mode == int_n_data[i].m)
975 return (unsigned_p ? int_n_trees[i].unsigned_type
976 : int_n_trees[i].signed_type);
977
978 if (mode == QImode)
979 return unsigned_p ? unsigned_intQI_type_node : intQI_type_node;
980
981 if (mode == HImode)
982 return unsigned_p ? unsigned_intHI_type_node : intHI_type_node;
983
984 if (mode == SImode)
985 return unsigned_p ? unsigned_intSI_type_node : intSI_type_node;
986
987 if (mode == DImode)
988 return unsigned_p ? unsigned_intDI_type_node : intDI_type_node;
989
990 #if HOST_BITS_PER_WIDE_INT >= 64
991 if (mode == TYPE_MODE (intTI_type_node))
992 return unsigned_p ? unsigned_intTI_type_node : intTI_type_node;
993 #endif
994
995 if (mode == TYPE_MODE (float_type_node))
996 return float_type_node;
997
998 if (mode == TYPE_MODE (double_type_node))
999 return double_type_node;
1000
1001 if (mode == TYPE_MODE (long_double_type_node))
1002 return long_double_type_node;
1003
1004 if (mode == TYPE_MODE (void_type_node))
1005 return void_type_node;
1006
1007 if (mode == TYPE_MODE (build_pointer_type (char_type_node))
1008 || mode == TYPE_MODE (build_pointer_type (integer_type_node)))
1009 {
1010 unsigned int precision
1011 = GET_MODE_PRECISION (as_a <scalar_int_mode> (mode));
1012 return (unsigned_p
1013 ? make_unsigned_type (precision)
1014 : make_signed_type (precision));
1015 }
1016
1017 if (COMPLEX_MODE_P (mode))
1018 {
1019 machine_mode inner_mode;
1020 tree inner_type;
1021
1022 if (mode == TYPE_MODE (complex_float_type_node))
1023 return complex_float_type_node;
1024 if (mode == TYPE_MODE (complex_double_type_node))
1025 return complex_double_type_node;
1026 if (mode == TYPE_MODE (complex_long_double_type_node))
1027 return complex_long_double_type_node;
1028
1029 if (mode == TYPE_MODE (complex_integer_type_node) && !unsigned_p)
1030 return complex_integer_type_node;
1031
1032 inner_mode = GET_MODE_INNER (mode);
1033 inner_type = lto_type_for_mode (inner_mode, unsigned_p);
1034 if (inner_type != NULL_TREE)
1035 return build_complex_type (inner_type);
1036 }
1037 else if (GET_MODE_CLASS (mode) == MODE_VECTOR_BOOL
1038 && valid_vector_subparts_p (GET_MODE_NUNITS (mode)))
1039 {
1040 unsigned int elem_bits = vector_element_size (GET_MODE_BITSIZE (mode),
1041 GET_MODE_NUNITS (mode));
1042 tree bool_type = build_nonstandard_boolean_type (elem_bits);
1043 return build_vector_type_for_mode (bool_type, mode);
1044 }
1045 else if (VECTOR_MODE_P (mode)
1046 && valid_vector_subparts_p (GET_MODE_NUNITS (mode)))
1047 {
1048 machine_mode inner_mode = GET_MODE_INNER (mode);
1049 tree inner_type = lto_type_for_mode (inner_mode, unsigned_p);
1050 if (inner_type != NULL_TREE)
1051 return build_vector_type_for_mode (inner_type, mode);
1052 }
1053
1054 if (dfloat32_type_node != NULL_TREE
1055 && mode == TYPE_MODE (dfloat32_type_node))
1056 return dfloat32_type_node;
1057 if (dfloat64_type_node != NULL_TREE
1058 && mode == TYPE_MODE (dfloat64_type_node))
1059 return dfloat64_type_node;
1060 if (dfloat128_type_node != NULL_TREE
1061 && mode == TYPE_MODE (dfloat128_type_node))
1062 return dfloat128_type_node;
1063
1064 if (ALL_SCALAR_FIXED_POINT_MODE_P (mode))
1065 {
1066 if (mode == TYPE_MODE (short_fract_type_node))
1067 return unsigned_p ? sat_short_fract_type_node : short_fract_type_node;
1068 if (mode == TYPE_MODE (fract_type_node))
1069 return unsigned_p ? sat_fract_type_node : fract_type_node;
1070 if (mode == TYPE_MODE (long_fract_type_node))
1071 return unsigned_p ? sat_long_fract_type_node : long_fract_type_node;
1072 if (mode == TYPE_MODE (long_long_fract_type_node))
1073 return unsigned_p ? sat_long_long_fract_type_node
1074 : long_long_fract_type_node;
1075
1076 if (mode == TYPE_MODE (unsigned_short_fract_type_node))
1077 return unsigned_p ? sat_unsigned_short_fract_type_node
1078 : unsigned_short_fract_type_node;
1079 if (mode == TYPE_MODE (unsigned_fract_type_node))
1080 return unsigned_p ? sat_unsigned_fract_type_node
1081 : unsigned_fract_type_node;
1082 if (mode == TYPE_MODE (unsigned_long_fract_type_node))
1083 return unsigned_p ? sat_unsigned_long_fract_type_node
1084 : unsigned_long_fract_type_node;
1085 if (mode == TYPE_MODE (unsigned_long_long_fract_type_node))
1086 return unsigned_p ? sat_unsigned_long_long_fract_type_node
1087 : unsigned_long_long_fract_type_node;
1088
1089 if (mode == TYPE_MODE (short_accum_type_node))
1090 return unsigned_p ? sat_short_accum_type_node : short_accum_type_node;
1091 if (mode == TYPE_MODE (accum_type_node))
1092 return unsigned_p ? sat_accum_type_node : accum_type_node;
1093 if (mode == TYPE_MODE (long_accum_type_node))
1094 return unsigned_p ? sat_long_accum_type_node : long_accum_type_node;
1095 if (mode == TYPE_MODE (long_long_accum_type_node))
1096 return unsigned_p ? sat_long_long_accum_type_node
1097 : long_long_accum_type_node;
1098
1099 if (mode == TYPE_MODE (unsigned_short_accum_type_node))
1100 return unsigned_p ? sat_unsigned_short_accum_type_node
1101 : unsigned_short_accum_type_node;
1102 if (mode == TYPE_MODE (unsigned_accum_type_node))
1103 return unsigned_p ? sat_unsigned_accum_type_node
1104 : unsigned_accum_type_node;
1105 if (mode == TYPE_MODE (unsigned_long_accum_type_node))
1106 return unsigned_p ? sat_unsigned_long_accum_type_node
1107 : unsigned_long_accum_type_node;
1108 if (mode == TYPE_MODE (unsigned_long_long_accum_type_node))
1109 return unsigned_p ? sat_unsigned_long_long_accum_type_node
1110 : unsigned_long_long_accum_type_node;
1111
1112 if (mode == QQmode)
1113 return unsigned_p ? sat_qq_type_node : qq_type_node;
1114 if (mode == HQmode)
1115 return unsigned_p ? sat_hq_type_node : hq_type_node;
1116 if (mode == SQmode)
1117 return unsigned_p ? sat_sq_type_node : sq_type_node;
1118 if (mode == DQmode)
1119 return unsigned_p ? sat_dq_type_node : dq_type_node;
1120 if (mode == TQmode)
1121 return unsigned_p ? sat_tq_type_node : tq_type_node;
1122
1123 if (mode == UQQmode)
1124 return unsigned_p ? sat_uqq_type_node : uqq_type_node;
1125 if (mode == UHQmode)
1126 return unsigned_p ? sat_uhq_type_node : uhq_type_node;
1127 if (mode == USQmode)
1128 return unsigned_p ? sat_usq_type_node : usq_type_node;
1129 if (mode == UDQmode)
1130 return unsigned_p ? sat_udq_type_node : udq_type_node;
1131 if (mode == UTQmode)
1132 return unsigned_p ? sat_utq_type_node : utq_type_node;
1133
1134 if (mode == HAmode)
1135 return unsigned_p ? sat_ha_type_node : ha_type_node;
1136 if (mode == SAmode)
1137 return unsigned_p ? sat_sa_type_node : sa_type_node;
1138 if (mode == DAmode)
1139 return unsigned_p ? sat_da_type_node : da_type_node;
1140 if (mode == TAmode)
1141 return unsigned_p ? sat_ta_type_node : ta_type_node;
1142
1143 if (mode == UHAmode)
1144 return unsigned_p ? sat_uha_type_node : uha_type_node;
1145 if (mode == USAmode)
1146 return unsigned_p ? sat_usa_type_node : usa_type_node;
1147 if (mode == UDAmode)
1148 return unsigned_p ? sat_uda_type_node : uda_type_node;
1149 if (mode == UTAmode)
1150 return unsigned_p ? sat_uta_type_node : uta_type_node;
1151 }
1152
1153 for (t = registered_builtin_types; t; t = TREE_CHAIN (t))
1154 if (TYPE_MODE (TREE_VALUE (t)) == mode)
1155 return TREE_VALUE (t);
1156
1157 return NULL_TREE;
1158 }
1159
1160 /* Return true if we are in the global binding level. */
1161
1162 static bool
lto_global_bindings_p(void)1163 lto_global_bindings_p (void)
1164 {
1165 return cfun == NULL;
1166 }
1167
1168 static void
lto_set_decl_assembler_name(tree decl)1169 lto_set_decl_assembler_name (tree decl)
1170 {
1171 /* This is almost the same as lhd_set_decl_assembler_name, except that
1172 we need to uniquify file-scope names, even if they are not
1173 TREE_PUBLIC, to avoid conflicts between individual files. */
1174 tree id;
1175
1176 if (TREE_PUBLIC (decl))
1177 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
1178 else
1179 {
1180 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1181 char *label;
1182 static unsigned long num;
1183
1184 ASM_FORMAT_PRIVATE_NAME (label, name, num++);
1185 id = get_identifier (label);
1186 }
1187
1188 SET_DECL_ASSEMBLER_NAME (decl, id);
1189 }
1190
1191 static tree
lto_pushdecl(tree t ATTRIBUTE_UNUSED)1192 lto_pushdecl (tree t ATTRIBUTE_UNUSED)
1193 {
1194 /* Do nothing, since we get all information from DWARF and LTO
1195 sections. */
1196 return NULL_TREE;
1197 }
1198
1199 static tree
lto_getdecls(void)1200 lto_getdecls (void)
1201 {
1202 /* We have our own write_globals langhook, hence the getdecls
1203 langhook shouldn't be used, except by dbxout.c, so we can't
1204 just abort here. */
1205 return NULL_TREE;
1206 }
1207
1208 static tree
lto_builtin_function(tree decl)1209 lto_builtin_function (tree decl)
1210 {
1211 return decl;
1212 }
1213
1214 static void
lto_register_builtin_type(tree type,const char * name)1215 lto_register_builtin_type (tree type, const char *name)
1216 {
1217 tree decl;
1218
1219 if (!TYPE_NAME (type))
1220 {
1221 decl = build_decl (UNKNOWN_LOCATION, TYPE_DECL,
1222 get_identifier (name), type);
1223 DECL_ARTIFICIAL (decl) = 1;
1224 TYPE_NAME (type) = decl;
1225 }
1226
1227 registered_builtin_types = tree_cons (0, type, registered_builtin_types);
1228 }
1229
1230 /* Build nodes that would have be created by the C front-end; necessary
1231 for including builtin-types.def and ultimately builtins.def. */
1232
1233 static void
lto_build_c_type_nodes(void)1234 lto_build_c_type_nodes (void)
1235 {
1236 gcc_assert (void_type_node);
1237
1238 void_list_node = build_tree_list (NULL_TREE, void_type_node);
1239 string_type_node = build_pointer_type (char_type_node);
1240 const_string_type_node
1241 = build_pointer_type (build_qualified_type (char_type_node, TYPE_QUAL_CONST));
1242
1243 if (strcmp (SIZE_TYPE, "unsigned int") == 0)
1244 {
1245 intmax_type_node = integer_type_node;
1246 uintmax_type_node = unsigned_type_node;
1247 signed_size_type_node = integer_type_node;
1248 }
1249 else if (strcmp (SIZE_TYPE, "long unsigned int") == 0)
1250 {
1251 intmax_type_node = long_integer_type_node;
1252 uintmax_type_node = long_unsigned_type_node;
1253 signed_size_type_node = long_integer_type_node;
1254 }
1255 else if (strcmp (SIZE_TYPE, "long long unsigned int") == 0)
1256 {
1257 intmax_type_node = long_long_integer_type_node;
1258 uintmax_type_node = long_long_unsigned_type_node;
1259 signed_size_type_node = long_long_integer_type_node;
1260 }
1261 else
1262 {
1263 int i;
1264
1265 signed_size_type_node = NULL_TREE;
1266 for (i = 0; i < NUM_INT_N_ENTS; i++)
1267 if (int_n_enabled_p[i])
1268 {
1269 char name[50], altname[50];
1270 sprintf (name, "__int%d unsigned", int_n_data[i].bitsize);
1271 sprintf (altname, "__int%d__ unsigned", int_n_data[i].bitsize);
1272
1273 if (strcmp (name, SIZE_TYPE) == 0
1274 || strcmp (altname, SIZE_TYPE) == 0)
1275 {
1276 intmax_type_node = int_n_trees[i].signed_type;
1277 uintmax_type_node = int_n_trees[i].unsigned_type;
1278 signed_size_type_node = int_n_trees[i].signed_type;
1279 }
1280 }
1281 if (signed_size_type_node == NULL_TREE)
1282 gcc_unreachable ();
1283 }
1284
1285 wint_type_node = unsigned_type_node;
1286 pid_type_node = integer_type_node;
1287 }
1288
1289 /* Perform LTO-specific initialization. */
1290
1291 static bool
lto_init(void)1292 lto_init (void)
1293 {
1294 int i;
1295
1296 /* Initialize LTO-specific data structures. */
1297 in_lto_p = true;
1298
1299 /* We need to generate LTO if running in WPA mode. */
1300 flag_generate_lto = (flag_incremental_link == INCREMENTAL_LINK_LTO
1301 || flag_wpa != NULL);
1302
1303 /* Create the basic integer types. */
1304 build_common_tree_nodes (flag_signed_char);
1305
1306 /* The global tree for the main identifier is filled in by
1307 language-specific front-end initialization that is not run in the
1308 LTO back-end. It appears that all languages that perform such
1309 initialization currently do so in the same way, so we do it here. */
1310 if (main_identifier_node == NULL_TREE)
1311 main_identifier_node = get_identifier ("main");
1312
1313 /* In the C++ front-end, fileptr_type_node is defined as a variant
1314 copy of ptr_type_node, rather than ptr_node itself. The
1315 distinction should only be relevant to the front-end, so we
1316 always use the C definition here in lto1.
1317 Likewise for const struct tm*. */
1318 for (unsigned i = 0;
1319 i < sizeof (builtin_structptr_types) / sizeof (builtin_structptr_type);
1320 ++i)
1321 {
1322 gcc_assert (builtin_structptr_types[i].node
1323 == builtin_structptr_types[i].base);
1324 gcc_assert (TYPE_MAIN_VARIANT (builtin_structptr_types[i].node)
1325 == builtin_structptr_types[i].base);
1326 }
1327
1328 lto_build_c_type_nodes ();
1329 gcc_assert (va_list_type_node);
1330
1331 if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
1332 {
1333 tree x = build_pointer_type (TREE_TYPE (va_list_type_node));
1334 lto_define_builtins (x, x);
1335 }
1336 else
1337 {
1338 lto_define_builtins (build_reference_type (va_list_type_node),
1339 va_list_type_node);
1340 }
1341
1342 targetm.init_builtins ();
1343 build_common_builtin_nodes ();
1344
1345 /* Assign names to the builtin types, otherwise they'll end up
1346 as __unknown__ in debug info.
1347 ??? We simply need to stop pre-seeding the streamer cache.
1348 Below is modeled after from c-common.c:c_common_nodes_and_builtins */
1349 #define NAME_TYPE(t,n) \
1350 if (t) \
1351 TYPE_NAME (t) = build_decl (UNKNOWN_LOCATION, TYPE_DECL, \
1352 get_identifier (n), t)
1353 NAME_TYPE (integer_type_node, "int");
1354 NAME_TYPE (char_type_node, "char");
1355 NAME_TYPE (long_integer_type_node, "long int");
1356 NAME_TYPE (unsigned_type_node, "unsigned int");
1357 NAME_TYPE (long_unsigned_type_node, "long unsigned int");
1358 NAME_TYPE (long_long_integer_type_node, "long long int");
1359 NAME_TYPE (long_long_unsigned_type_node, "long long unsigned int");
1360 NAME_TYPE (short_integer_type_node, "short int");
1361 NAME_TYPE (short_unsigned_type_node, "short unsigned int");
1362 if (signed_char_type_node != char_type_node)
1363 NAME_TYPE (signed_char_type_node, "signed char");
1364 if (unsigned_char_type_node != char_type_node)
1365 NAME_TYPE (unsigned_char_type_node, "unsigned char");
1366 NAME_TYPE (float_type_node, "float");
1367 NAME_TYPE (double_type_node, "double");
1368 NAME_TYPE (long_double_type_node, "long double");
1369 NAME_TYPE (void_type_node, "void");
1370 NAME_TYPE (boolean_type_node, "bool");
1371 NAME_TYPE (complex_float_type_node, "complex float");
1372 NAME_TYPE (complex_double_type_node, "complex double");
1373 NAME_TYPE (complex_long_double_type_node, "complex long double");
1374 for (i = 0; i < NUM_INT_N_ENTS; i++)
1375 if (int_n_enabled_p[i])
1376 {
1377 char name[50];
1378 sprintf (name, "__int%d", int_n_data[i].bitsize);
1379 NAME_TYPE (int_n_trees[i].signed_type, name);
1380 }
1381 #undef NAME_TYPE
1382
1383 return true;
1384 }
1385
1386 /* Register c++-specific dumps. */
1387
1388 void
lto_register_dumps(gcc::dump_manager * dumps)1389 lto_register_dumps (gcc::dump_manager *dumps)
1390 {
1391 lto_link_dump_id = dumps->dump_register
1392 (".lto-link", "ipa-lto-link", "ipa-lto-link",
1393 DK_ipa, OPTGROUP_NONE, false);
1394 decl_merge_dump_id = dumps->dump_register
1395 (".lto-decl-merge", "ipa-lto-decl-merge", "ipa-lto-decl-merge",
1396 DK_ipa, OPTGROUP_NONE, false);
1397 partition_dump_id = dumps->dump_register
1398 (".lto-partition", "ipa-lto-partition", "ipa-lto-partition",
1399 DK_ipa, OPTGROUP_NONE, false);
1400 }
1401
1402
1403 /* Initialize tree structures required by the LTO front end. */
1404
lto_init_ts(void)1405 static void lto_init_ts (void)
1406 {
1407 tree_contains_struct[NAMESPACE_DECL][TS_DECL_MINIMAL] = 1;
1408 }
1409
1410 #undef LANG_HOOKS_NAME
1411 #define LANG_HOOKS_NAME "GNU GIMPLE"
1412 #undef LANG_HOOKS_OPTION_LANG_MASK
1413 #define LANG_HOOKS_OPTION_LANG_MASK lto_option_lang_mask
1414 #undef LANG_HOOKS_COMPLAIN_WRONG_LANG_P
1415 #define LANG_HOOKS_COMPLAIN_WRONG_LANG_P lto_complain_wrong_lang_p
1416 #undef LANG_HOOKS_INIT_OPTIONS_STRUCT
1417 #define LANG_HOOKS_INIT_OPTIONS_STRUCT lto_init_options_struct
1418 #undef LANG_HOOKS_REGISTER_DUMPS
1419 #define LANG_HOOKS_REGISTER_DUMPS lto_register_dumps
1420 #undef LANG_HOOKS_HANDLE_OPTION
1421 #define LANG_HOOKS_HANDLE_OPTION lto_handle_option
1422 #undef LANG_HOOKS_POST_OPTIONS
1423 #define LANG_HOOKS_POST_OPTIONS lto_post_options
1424 #undef LANG_HOOKS_GET_ALIAS_SET
1425 #define LANG_HOOKS_GET_ALIAS_SET gimple_get_alias_set
1426 #undef LANG_HOOKS_TYPE_FOR_MODE
1427 #define LANG_HOOKS_TYPE_FOR_MODE lto_type_for_mode
1428 #undef LANG_HOOKS_SET_DECL_ASSEMBLER_NAME
1429 #define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME lto_set_decl_assembler_name
1430 #undef LANG_HOOKS_GLOBAL_BINDINGS_P
1431 #define LANG_HOOKS_GLOBAL_BINDINGS_P lto_global_bindings_p
1432 #undef LANG_HOOKS_PUSHDECL
1433 #define LANG_HOOKS_PUSHDECL lto_pushdecl
1434 #undef LANG_HOOKS_GETDECLS
1435 #define LANG_HOOKS_GETDECLS lto_getdecls
1436 #undef LANG_HOOKS_REGISTER_BUILTIN_TYPE
1437 #define LANG_HOOKS_REGISTER_BUILTIN_TYPE lto_register_builtin_type
1438 #undef LANG_HOOKS_BUILTIN_FUNCTION
1439 #define LANG_HOOKS_BUILTIN_FUNCTION lto_builtin_function
1440 #undef LANG_HOOKS_INIT
1441 #define LANG_HOOKS_INIT lto_init
1442 #undef LANG_HOOKS_PARSE_FILE
1443 #define LANG_HOOKS_PARSE_FILE lto_main
1444 #undef LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS
1445 #define LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS true
1446 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
1447 #define LANG_HOOKS_TYPES_COMPATIBLE_P NULL
1448 #undef LANG_HOOKS_EH_PERSONALITY
1449 #define LANG_HOOKS_EH_PERSONALITY lto_eh_personality
1450
1451 /* Attribute hooks. */
1452 #undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
1453 #define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE lto_attribute_table
1454 #undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
1455 #define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE lto_format_attribute_table
1456
1457 #undef LANG_HOOKS_BEGIN_SECTION
1458 #define LANG_HOOKS_BEGIN_SECTION lto_obj_begin_section
1459 #undef LANG_HOOKS_APPEND_DATA
1460 #define LANG_HOOKS_APPEND_DATA lto_obj_append_data
1461 #undef LANG_HOOKS_END_SECTION
1462 #define LANG_HOOKS_END_SECTION lto_obj_end_section
1463
1464 #undef LANG_HOOKS_INIT_TS
1465 #define LANG_HOOKS_INIT_TS lto_init_ts
1466
1467 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
1468
1469 /* Language hooks that are not part of lang_hooks. */
1470
1471 tree
convert(tree type ATTRIBUTE_UNUSED,tree expr ATTRIBUTE_UNUSED)1472 convert (tree type ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED)
1473 {
1474 gcc_unreachable ();
1475 }
1476
1477 /* Tree walking support. */
1478
1479 static enum lto_tree_node_structure_enum
lto_tree_node_structure(union lang_tree_node * t ATTRIBUTE_UNUSED)1480 lto_tree_node_structure (union lang_tree_node *t ATTRIBUTE_UNUSED)
1481 {
1482 return TS_LTO_GENERIC;
1483 }
1484
1485 #include "gtype-lto.h"
1486 #include "gt-lto-lto-lang.h"
1487