Import gcc-4.7.2 to new vendor branch
[dragonfly.git] / contrib / gcc-4.7 / gcc / tree-streamer-in.c
CommitLineData
e4b17023
JM
1/* Routines for reading trees from a file stream.
2
3 Copyright 2011 Free Software Foundation, Inc.
4 Contributed by Diego Novillo <dnovillo@google.com>
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 3, or (at your option) any later
11version.
12
13GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING3. If not see
20<http://www.gnu.org/licenses/>. */
21
22#include "config.h"
23#include "system.h"
24#include "coretypes.h"
25#include "diagnostic.h"
26#include "tree.h"
27#include "tree-flow.h"
28#include "tree-streamer.h"
29#include "data-streamer.h"
30#include "streamer-hooks.h"
31#include "lto-streamer.h"
32
33/* Read a STRING_CST from the string table in DATA_IN using input
34 block IB. */
35
36tree
37streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
38{
39 unsigned int len;
40 const char * ptr;
41
42 ptr = streamer_read_indexed_string (data_in, ib, &len);
43 if (!ptr)
44 return NULL;
45 return build_string (len, ptr);
46}
47
48
49/* Read an IDENTIFIER from the string table in DATA_IN using input
50 block IB. */
51
52static tree
53input_identifier (struct data_in *data_in, struct lto_input_block *ib)
54{
55 unsigned int len;
56 const char *ptr;
57
58 ptr = streamer_read_indexed_string (data_in, ib, &len);
59 if (!ptr)
60 return NULL;
61 return get_identifier_with_length (ptr, len);
62}
63
64
65/* Read a chain of tree nodes from input block IB. DATA_IN contains
66 tables and descriptors for the file being read. */
67
68tree
69streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
70{
71 int i, count;
72 tree first, prev, curr;
73
74 first = prev = NULL_TREE;
75 count = streamer_read_hwi (ib);
76 for (i = 0; i < count; i++)
77 {
78 curr = stream_read_tree (ib, data_in);
79 if (prev)
80 TREE_CHAIN (prev) = curr;
81 else
82 first = curr;
83
84 TREE_CHAIN (curr) = NULL_TREE;
85 prev = curr;
86 }
87
88 return first;
89}
90
91
92/* Unpack all the non-pointer fields of the TS_BASE structure of
93 expression EXPR from bitpack BP. */
94
95static void
96unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
97{
98 /* Note that the code for EXPR has already been unpacked to create EXPR in
99 streamer_alloc_tree. */
100 if (!TYPE_P (expr))
101 {
102 TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
103 TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
104 TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
105
106 /* TREE_PUBLIC is used on types to indicate that the type
107 has a TYPE_CACHED_VALUES vector. This is not streamed out,
108 so we skip it here. */
109 TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
110 }
111 else
112 bp_unpack_value (bp, 4);
113 TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
114 TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
115 if (DECL_P (expr))
116 DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
117 else if (TYPE_P (expr))
118 TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
119 else
120 bp_unpack_value (bp, 1);
121 TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
122 if (TYPE_P (expr))
123 TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
124 else
125 TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
126 TREE_USED (expr) = (unsigned) bp_unpack_value (bp, 1);
127 TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
128 TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
129 TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
130 TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
131 TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
132 if (TYPE_P (expr))
133 {
134 TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
135 TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
136 }
137 else if (TREE_CODE (expr) == SSA_NAME)
138 SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
139 else
140 bp_unpack_value (bp, 1);
141}
142
143
144/* Unpack all the non-pointer fields of the TS_REAL_CST structure of
145 expression EXPR from bitpack BP. */
146
147static void
148unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
149{
150 unsigned i;
151 REAL_VALUE_TYPE r;
152 REAL_VALUE_TYPE *rp;
153
154 r.cl = (unsigned) bp_unpack_value (bp, 2);
155 r.decimal = (unsigned) bp_unpack_value (bp, 1);
156 r.sign = (unsigned) bp_unpack_value (bp, 1);
157 r.signalling = (unsigned) bp_unpack_value (bp, 1);
158 r.canonical = (unsigned) bp_unpack_value (bp, 1);
159 r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
160 for (i = 0; i < SIGSZ; i++)
161 r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
162
163 rp = ggc_alloc_real_value ();
164 memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
165 TREE_REAL_CST_PTR (expr) = rp;
166}
167
168
169/* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
170 expression EXPR from bitpack BP. */
171
172static void
173unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
174{
175 struct fixed_value fv;
176
177 fv.mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
178 fv.data.low = bp_unpack_var_len_int (bp);
179 fv.data.high = bp_unpack_var_len_int (bp);
180 TREE_FIXED_CST (expr) = fv;
181}
182
183
184/* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
185 of expression EXPR from bitpack BP. */
186
187static void
188unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
189{
190 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
191 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
192 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
193 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
194 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
195 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
196 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
197 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
198 DECL_DEBUG_EXPR_IS_FROM (expr) = (unsigned) bp_unpack_value (bp, 1);
199 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
200 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
201 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
202
203 if (TREE_CODE (expr) == LABEL_DECL)
204 {
205 DECL_ERROR_ISSUED (expr) = (unsigned) bp_unpack_value (bp, 1);
206 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
207
208 /* Always assume an initial value of -1 for LABEL_DECL_UID to
209 force gimple_set_bb to recreate label_to_block_map. */
210 LABEL_DECL_UID (expr) = -1;
211 }
212
213 if (TREE_CODE (expr) == FIELD_DECL)
214 {
215 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
216 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
217 expr->decl_common.off_align = bp_unpack_value (bp, 8);
218 }
219
220 if (TREE_CODE (expr) == RESULT_DECL
221 || TREE_CODE (expr) == PARM_DECL
222 || TREE_CODE (expr) == VAR_DECL)
223 {
224 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
225 if (TREE_CODE (expr) == VAR_DECL
226 || TREE_CODE (expr) == PARM_DECL)
227 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
228 DECL_RESTRICTED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
229 }
230}
231
232
233/* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
234 of expression EXPR from bitpack BP. */
235
236static void
237unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
238{
239 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
240}
241
242
243/* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
244 of expression EXPR from bitpack BP. */
245
246static void
247unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
248{
249 DECL_DEFER_OUTPUT (expr) = (unsigned) bp_unpack_value (bp, 1);
250 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
251 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
252 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
253 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
254 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1);
255 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2);
256 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1);
257
258 if (TREE_CODE (expr) == VAR_DECL)
259 {
260 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
261 DECL_IN_TEXT_SECTION (expr) = (unsigned) bp_unpack_value (bp, 1);
262 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
263 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3);
264 }
265
266 if (VAR_OR_FUNCTION_DECL_P (expr))
267 {
268 priority_type p;
269 p = (priority_type) bp_unpack_var_len_unsigned (bp);
270 SET_DECL_INIT_PRIORITY (expr, p);
271 }
272}
273
274
275/* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
276 of expression EXPR from bitpack BP. */
277
278static void
279unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
280{
281 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
282 BUILT_IN_LAST);
283 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
284 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
285 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
286 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
287 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
288 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
289 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
290 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
291 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
292 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
293 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
294 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
295 = (unsigned) bp_unpack_value (bp, 1);
296 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
297 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
298 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
299 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
300 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
301 {
302 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
303 11);
304 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
305 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
306 fatal_error ("machine independent builtin code out of range");
307 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
308 {
309 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
310 if (!result || result == error_mark_node)
311 fatal_error ("target specific builtin not available");
312 }
313 }
314 if (DECL_STATIC_DESTRUCTOR (expr))
315 {
316 priority_type p;
317 p = (priority_type) bp_unpack_var_len_unsigned (bp);
318 SET_DECL_FINI_PRIORITY (expr, p);
319 }
320}
321
322
323/* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
324 of expression EXPR from bitpack BP. */
325
326static void
327unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
328{
329 enum machine_mode mode;
330
331 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
332 SET_TYPE_MODE (expr, mode);
333 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
334 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
335 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
336 if (RECORD_OR_UNION_TYPE_P (expr))
337 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
338 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
339 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
340 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr)
341 = (unsigned) bp_unpack_value (bp, 2);
342 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
343 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
344 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
345 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
346 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
347}
348
349
350/* Unpack all the non-pointer fields of the TS_BLOCK structure
351 of expression EXPR from bitpack BP. */
352
353static void
354unpack_ts_block_value_fields (struct bitpack_d *bp, tree expr)
355{
356 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
357 /* BLOCK_NUMBER is recomputed. */
358}
359
360/* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
361 structure of expression EXPR from bitpack BP. */
362
363static void
364unpack_ts_translation_unit_decl_value_fields (struct bitpack_d *bp ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED)
365{
366}
367
368/* Unpack all the non-pointer fields in EXPR into a bit pack. */
369
370static void
371unpack_value_fields (struct bitpack_d *bp, tree expr)
372{
373 enum tree_code code;
374
375 code = TREE_CODE (expr);
376
377 /* Note that all these functions are highly sensitive to changes in
378 the types and sizes of each of the fields being packed. */
379 unpack_ts_base_value_fields (bp, expr);
380
381 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
382 unpack_ts_real_cst_value_fields (bp, expr);
383
384 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
385 unpack_ts_fixed_cst_value_fields (bp, expr);
386
387 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
388 unpack_ts_decl_common_value_fields (bp, expr);
389
390 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
391 unpack_ts_decl_wrtl_value_fields (bp, expr);
392
393 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
394 unpack_ts_decl_with_vis_value_fields (bp, expr);
395
396 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
397 unpack_ts_function_decl_value_fields (bp, expr);
398
399 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
400 unpack_ts_type_common_value_fields (bp, expr);
401
402 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
403 unpack_ts_block_value_fields (bp, expr);
404
405 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
406 unpack_ts_translation_unit_decl_value_fields (bp, expr);
407}
408
409
410/* Read all the language-independent bitfield values for EXPR from IB.
411 Return the partially unpacked bitpack so the caller can unpack any other
412 bitfield values that the writer may have written. */
413
414struct bitpack_d
415streamer_read_tree_bitfields (struct lto_input_block *ib, tree expr)
416{
417 enum tree_code code;
418 struct bitpack_d bp;
419
420 /* Read the bitpack of non-pointer values from IB. */
421 bp = streamer_read_bitpack (ib);
422
423 /* The first word in BP contains the code of the tree that we
424 are about to read. */
425 code = (enum tree_code) bp_unpack_value (&bp, 16);
426 lto_tag_check (lto_tree_code_to_tag (code),
427 lto_tree_code_to_tag (TREE_CODE (expr)));
428
429 /* Unpack all the value fields from BP. */
430 unpack_value_fields (&bp, expr);
431
432 return bp;
433}
434
435
436/* Materialize a new tree from input block IB using descriptors in
437 DATA_IN. The code for the new tree should match TAG. Store in
438 *IX_P the index into the reader cache where the new tree is stored. */
439
440tree
441streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
442 enum LTO_tags tag)
443{
444 enum tree_code code;
445 tree result;
446#ifdef LTO_STREAMER_DEBUG
447 HOST_WIDEST_INT orig_address_in_writer;
448#endif
449
450 result = NULL_TREE;
451
452#ifdef LTO_STREAMER_DEBUG
453 /* Read the word representing the memory address for the tree
454 as it was written by the writer. This is useful when
455 debugging differences between the writer and reader. */
456 orig_address_in_writer = streamer_read_hwi (ib);
457 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
458#endif
459
460 code = lto_tag_to_tree_code (tag);
461
462 /* We should never see an SSA_NAME tree. Only the version numbers of
463 SSA names are ever written out. See input_ssa_names. */
464 gcc_assert (code != SSA_NAME);
465
466 /* Instantiate a new tree using the header data. */
467 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
468 result = streamer_read_string_cst (data_in, ib);
469 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
470 result = input_identifier (data_in, ib);
471 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
472 {
473 HOST_WIDE_INT len = streamer_read_hwi (ib);
474 result = make_tree_vec (len);
475 }
476 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
477 {
478 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
479 result = make_tree_binfo (len);
480 }
481 else if (code == CALL_EXPR)
482 {
483 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
484 return build_vl_exp (CALL_EXPR, nargs + 3);
485 }
486 else
487 {
488 /* For all other nodes, materialize the tree with a raw
489 make_node call. */
490 result = make_node (code);
491 }
492
493#ifdef LTO_STREAMER_DEBUG
494 /* Store the original address of the tree as seen by the writer
495 in RESULT's aux field. This is useful when debugging streaming
496 problems. This way, a debugging session can be started on
497 both writer and reader with a breakpoint using this address
498 value in both. */
499 lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
500#endif
501
502 return result;
503}
504
505
506/* Read all pointer fields in the TS_COMMON structure of EXPR from input
507 block IB. DATA_IN contains tables and descriptors for the
508 file being read. */
509
510
511static void
512lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
513 struct data_in *data_in, tree expr)
514{
515 if (TREE_CODE (expr) != IDENTIFIER_NODE)
516 TREE_TYPE (expr) = stream_read_tree (ib, data_in);
517}
518
519
520/* Read all pointer fields in the TS_VECTOR structure of EXPR from input
521 block IB. DATA_IN contains tables and descriptors for the
522 file being read. */
523
524static void
525lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
526 struct data_in *data_in, tree expr)
527{
528 TREE_VECTOR_CST_ELTS (expr) = streamer_read_chain (ib, data_in);
529}
530
531
532/* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
533 block IB. DATA_IN contains tables and descriptors for the
534 file being read. */
535
536static void
537lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
538 struct data_in *data_in, tree expr)
539{
540 TREE_REALPART (expr) = stream_read_tree (ib, data_in);
541 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
542}
543
544
545/* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
546 from input block IB. DATA_IN contains tables and descriptors for the
547 file being read. */
548
549static void
550lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
551 struct data_in *data_in, tree expr)
552{
553 DECL_NAME (expr) = stream_read_tree (ib, data_in);
554 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
555 DECL_SOURCE_LOCATION (expr) = lto_input_location (ib, data_in);
556}
557
558
559/* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
560 input block IB. DATA_IN contains tables and descriptors for the
561 file being read. */
562
563static void
564lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
565 struct data_in *data_in, tree expr)
566{
567 DECL_SIZE (expr) = stream_read_tree (ib, data_in);
568 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
569 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
570
571 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information
572 for early inlining so drop it on the floor instead of ICEing in
573 dwarf2out.c. */
574
575 if (TREE_CODE (expr) == PARM_DECL)
576 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
577
578 if ((TREE_CODE (expr) == VAR_DECL
579 || TREE_CODE (expr) == PARM_DECL)
580 && DECL_HAS_VALUE_EXPR_P (expr))
581 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
582
583 if (TREE_CODE (expr) == VAR_DECL)
584 {
585 tree dexpr = stream_read_tree (ib, data_in);
586 if (dexpr)
587 SET_DECL_DEBUG_EXPR (expr, dexpr);
588 }
589}
590
591
592/* Read all pointer fields in the TS_DECL_NON_COMMON structure of
593 EXPR from input block IB. DATA_IN contains tables and descriptors for the
594 file being read. */
595
596static void
597lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
598 struct data_in *data_in, tree expr)
599{
600 if (TREE_CODE (expr) == FUNCTION_DECL)
601 {
602 DECL_ARGUMENTS (expr) = stream_read_tree (ib, data_in);
603 DECL_RESULT (expr) = stream_read_tree (ib, data_in);
604 }
605 else if (TREE_CODE (expr) == TYPE_DECL)
606 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
607 DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
608}
609
610
611/* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
612 from input block IB. DATA_IN contains tables and descriptors for the
613 file being read. */
614
615static void
616lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
617 struct data_in *data_in, tree expr)
618{
619 tree id;
620
621 id = stream_read_tree (ib, data_in);
622 if (id)
623 {
624 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
625 SET_DECL_ASSEMBLER_NAME (expr, id);
626 }
627
628 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
629 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
630}
631
632
633/* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
634 input block IB. DATA_IN contains tables and descriptors for the
635 file being read. */
636
637static void
638lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
639 struct data_in *data_in, tree expr)
640{
641 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
642 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
643 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
644 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
645 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
646}
647
648
649/* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
650 from input block IB. DATA_IN contains tables and descriptors for the
651 file being read. */
652
653static void
654lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
655 struct data_in *data_in, tree expr)
656{
657 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto,
658 maybe it should be handled here? */
659 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
660 DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
661 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
662
663 /* If the file contains a function with an EH personality set,
664 then it was compiled with -fexceptions. In that case, initialize
665 the backend EH machinery. */
666 if (DECL_FUNCTION_PERSONALITY (expr))
667 lto_init_eh ();
668}
669
670
671/* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
672 input block IB. DATA_IN contains tables and descriptors for the file
673 being read. */
674
675static void
676lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
677 struct data_in *data_in, tree expr)
678{
679 TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
680 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
681 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
682 TYPE_NAME (expr) = stream_read_tree (ib, data_in);
683 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be
684 reconstructed during fixup. */
685 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
686 during fixup. */
687 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
688 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
689 /* TYPE_CANONICAL gets re-computed during type merging. */
690 TYPE_CANONICAL (expr) = NULL_TREE;
691 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
692}
693
694/* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
695 from input block IB. DATA_IN contains tables and descriptors for the
696 file being read. */
697
698static void
699lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
700 struct data_in *data_in,
701 tree expr)
702{
703 if (TREE_CODE (expr) == ENUMERAL_TYPE)
704 TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
705 else if (TREE_CODE (expr) == ARRAY_TYPE)
706 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
707 else if (RECORD_OR_UNION_TYPE_P (expr))
708 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
709 else if (TREE_CODE (expr) == FUNCTION_TYPE
710 || TREE_CODE (expr) == METHOD_TYPE)
711 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
712
713 if (!POINTER_TYPE_P (expr))
714 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
715 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
716 if (RECORD_OR_UNION_TYPE_P (expr))
717 TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
718}
719
720
721/* Read all pointer fields in the TS_LIST structure of EXPR from input
722 block IB. DATA_IN contains tables and descriptors for the
723 file being read. */
724
725static void
726lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
727 struct data_in *data_in, tree expr)
728{
729 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
730 TREE_VALUE (expr) = stream_read_tree (ib, data_in);
731 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
732}
733
734
735/* Read all pointer fields in the TS_VEC structure of EXPR from input
736 block IB. DATA_IN contains tables and descriptors for the
737 file being read. */
738
739static void
740lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
741 struct data_in *data_in, tree expr)
742{
743 int i;
744
745 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
746 instantiate EXPR. */
747 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
748 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
749}
750
751
752/* Read all pointer fields in the TS_EXP structure of EXPR from input
753 block IB. DATA_IN contains tables and descriptors for the
754 file being read. */
755
756
757static void
758lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
759 struct data_in *data_in, tree expr)
760{
761 int i, length;
762 location_t loc;
763
764 length = streamer_read_hwi (ib);
765 gcc_assert (length == TREE_OPERAND_LENGTH (expr));
766
767 for (i = 0; i < length; i++)
768 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
769
770 loc = lto_input_location (ib, data_in);
771 SET_EXPR_LOCATION (expr, loc);
772 TREE_BLOCK (expr) = stream_read_tree (ib, data_in);
773}
774
775
776/* Read all pointer fields in the TS_BLOCK structure of EXPR from input
777 block IB. DATA_IN contains tables and descriptors for the
778 file being read. */
779
780static void
781lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
782 struct data_in *data_in, tree expr)
783{
784 /* Do not stream BLOCK_SOURCE_LOCATION. We cannot handle debug information
785 for early inlining so drop it on the floor instead of ICEing in
786 dwarf2out.c. */
787 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
788
789 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
790 for early inlining so drop it on the floor instead of ICEing in
791 dwarf2out.c. */
792
793 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
794
795 /* Do not stream BLOCK_ABSTRACT_ORIGIN. We cannot handle debug information
796 for early inlining so drop it on the floor instead of ICEing in
797 dwarf2out.c. */
798 BLOCK_FRAGMENT_ORIGIN (expr) = stream_read_tree (ib, data_in);
799 BLOCK_FRAGMENT_CHAIN (expr) = stream_read_tree (ib, data_in);
800
801 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
802 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
803 stream the child relationship explicitly. */
804 if (BLOCK_SUPERCONTEXT (expr)
805 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
806 {
807 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
808 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
809 }
810
811 /* The global block is rooted at the TU decl. Hook it here to
812 avoid the need to stream in this block during WPA time. */
813 else if (BLOCK_SUPERCONTEXT (expr)
814 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
815 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
816
817 /* The function-level block is connected at the time we read in
818 function bodies for the same reason. */
819}
820
821
822/* Read all pointer fields in the TS_BINFO structure of EXPR from input
823 block IB. DATA_IN contains tables and descriptors for the
824 file being read. */
825
826static void
827lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
828 struct data_in *data_in, tree expr)
829{
830 unsigned i, len;
831 tree t;
832
833 /* Note that the number of slots in EXPR was read in
834 streamer_alloc_tree when instantiating EXPR. However, the
835 vector is empty so we cannot rely on VEC_length to know how many
836 elements to read. So, this list is emitted as a 0-terminated
837 list on the writer side. */
838 do
839 {
840 t = stream_read_tree (ib, data_in);
841 if (t)
842 VEC_quick_push (tree, BINFO_BASE_BINFOS (expr), t);
843 }
844 while (t);
845
846 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
847 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
848 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
849
850 len = streamer_read_uhwi (ib);
851 if (len > 0)
852 {
853 VEC_reserve_exact (tree, gc, BINFO_BASE_ACCESSES (expr), len);
854 for (i = 0; i < len; i++)
855 {
856 tree a = stream_read_tree (ib, data_in);
857 VEC_quick_push (tree, BINFO_BASE_ACCESSES (expr), a);
858 }
859 }
860
861 BINFO_INHERITANCE_CHAIN (expr) = stream_read_tree (ib, data_in);
862 BINFO_SUBVTT_INDEX (expr) = stream_read_tree (ib, data_in);
863 BINFO_VPTR_INDEX (expr) = stream_read_tree (ib, data_in);
864}
865
866
867/* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
868 input block IB. DATA_IN contains tables and descriptors for the
869 file being read. */
870
871static void
872lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
873 struct data_in *data_in, tree expr)
874{
875 unsigned i, len;
876
877 len = streamer_read_uhwi (ib);
878 for (i = 0; i < len; i++)
879 {
880 tree index, value;
881
882 index = stream_read_tree (ib, data_in);
883 value = stream_read_tree (ib, data_in);
884 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (expr), index, value);
885 }
886}
887
888
889/* Input a TS_TARGET_OPTION tree from IB into EXPR. */
890
891static void
892lto_input_ts_target_option (struct lto_input_block *ib, tree expr)
893{
894 unsigned i, len;
895 struct bitpack_d bp;
896 struct cl_target_option *t = TREE_TARGET_OPTION (expr);
897
898 bp = streamer_read_bitpack (ib);
899 len = sizeof (struct cl_target_option);
900 for (i = 0; i < len; i++)
901 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
902 if (bp_unpack_value (&bp, 32) != 0x12345678)
903 fatal_error ("cl_target_option size mismatch in LTO reader and writer");
904}
905
906/* Input a TS_OPTIMIZATION tree from IB into EXPR. */
907
908static void
909lto_input_ts_optimization (struct lto_input_block *ib, tree expr)
910{
911 unsigned i, len;
912 struct bitpack_d bp;
913 struct cl_optimization *t = TREE_OPTIMIZATION (expr);
914
915 bp = streamer_read_bitpack (ib);
916 len = sizeof (struct cl_optimization);
917 for (i = 0; i < len; i++)
918 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
919 if (bp_unpack_value (&bp, 32) != 0x12345678)
920 fatal_error ("cl_optimization size mismatch in LTO reader and writer");
921}
922
923/* Input a TS_TRANSLATION_UNIT_DECL tree from IB and DATA_IN into EXPR. */
924
925static void
926lto_input_ts_translation_unit_decl_tree_pointers (struct lto_input_block *ib,
927 struct data_in *data_in,
928 tree expr)
929{
930 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (streamer_read_string (data_in, ib));
931 VEC_safe_push (tree, gc, all_translation_units, expr);
932}
933
934/* Read all pointer fields in EXPR from input block IB. DATA_IN
935 contains tables and descriptors for the file being read. */
936
937void
938streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
939 tree expr)
940{
941 enum tree_code code;
942
943 code = TREE_CODE (expr);
944
945 if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
946 lto_input_ts_common_tree_pointers (ib, data_in, expr);
947
948 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
949 lto_input_ts_vector_tree_pointers (ib, data_in, expr);
950
951 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
952 lto_input_ts_complex_tree_pointers (ib, data_in, expr);
953
954 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
955 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
956
957 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
958 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
959
960 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
961 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
962
963 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
964 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
965
966 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
967 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
968
969 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
970 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
971
972 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
973 lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
974
975 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
976 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
977
978 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
979 lto_input_ts_list_tree_pointers (ib, data_in, expr);
980
981 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
982 lto_input_ts_vec_tree_pointers (ib, data_in, expr);
983
984 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
985 lto_input_ts_exp_tree_pointers (ib, data_in, expr);
986
987 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
988 lto_input_ts_block_tree_pointers (ib, data_in, expr);
989
990 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
991 lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
992
993 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
994 lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
995
996 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
997 lto_input_ts_target_option (ib, expr);
998
999 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
1000 lto_input_ts_optimization (ib, expr);
1001
1002 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
1003 lto_input_ts_translation_unit_decl_tree_pointers (ib, data_in, expr);
1004}
1005
1006
1007/* Read and INTEGER_CST node from input block IB using the per-file
1008 context in DATA_IN. */
1009
1010tree
1011streamer_read_integer_cst (struct lto_input_block *ib, struct data_in *data_in)
1012{
1013 tree result, type;
1014 HOST_WIDE_INT low, high;
1015 bool overflow_p;
1016
1017 type = stream_read_tree (ib, data_in);
1018 overflow_p = (streamer_read_uchar (ib) != 0);
1019 low = streamer_read_uhwi (ib);
1020 high = streamer_read_uhwi (ib);
1021 result = build_int_cst_wide (type, low, high);
1022
1023 /* If the original constant had overflown, build a replica of RESULT to
1024 avoid modifying the shared constant returned by build_int_cst_wide. */
1025 if (overflow_p)
1026 {
1027 result = copy_node (result);
1028 TREE_OVERFLOW (result) = 1;
1029 }
1030
1031 return result;
1032}
1033
1034
1035/* Read an index IX from input block IB and return the tree node at
1036 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */
1037
1038tree
1039streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1040{
1041 unsigned HOST_WIDE_INT ix;
1042 tree result;
1043 enum LTO_tags expected_tag;
1044
1045 ix = streamer_read_uhwi (ib);
1046 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1047
1048 result = streamer_tree_cache_get (data_in->reader_cache, ix);
1049 gcc_assert (result
1050 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1051
1052 return result;
1053}
1054
1055
1056/* Read a code and class from input block IB and return the
1057 corresponding builtin. DATA_IN is as in stream_read_tree. */
1058
1059tree
1060streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1061{
1062 enum built_in_class fclass;
1063 enum built_in_function fcode;
1064 const char *asmname;
1065 tree result;
1066
1067 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1068 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1069
1070 fcode = (enum built_in_function) streamer_read_uhwi (ib);
1071
1072 if (fclass == BUILT_IN_NORMAL)
1073 {
1074 if (fcode >= END_BUILTINS)
1075 fatal_error ("machine independent builtin code out of range");
1076 result = builtin_decl_explicit (fcode);
1077 gcc_assert (result);
1078 }
1079 else if (fclass == BUILT_IN_MD)
1080 {
1081 result = targetm.builtin_decl (fcode, true);
1082 if (!result || result == error_mark_node)
1083 fatal_error ("target specific builtin not available");
1084 }
1085 else
1086 gcc_unreachable ();
1087
1088 asmname = streamer_read_string (data_in, ib);
1089 if (asmname)
1090 set_builtin_user_assembler_name (result, asmname);
1091
1092 streamer_tree_cache_append (data_in->reader_cache, result);
1093
1094 return result;
1095}