Merge branch 'vendor/GCC47'
[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{
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JM
175 FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value ();
176 fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
177 fp->data.low = bp_unpack_var_len_int (bp);
178 fp->data.high = bp_unpack_var_len_int (bp);
179 TREE_FIXED_CST_PTR (expr) = fp;
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JM
180}
181
182
183/* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
184 of expression EXPR from bitpack BP. */
185
186static void
187unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
188{
189 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
190 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
191 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
192 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
193 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
194 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
195 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
196 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
197 DECL_DEBUG_EXPR_IS_FROM (expr) = (unsigned) bp_unpack_value (bp, 1);
198 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
199 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
200 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
201
202 if (TREE_CODE (expr) == LABEL_DECL)
203 {
204 DECL_ERROR_ISSUED (expr) = (unsigned) bp_unpack_value (bp, 1);
205 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
206
207 /* Always assume an initial value of -1 for LABEL_DECL_UID to
208 force gimple_set_bb to recreate label_to_block_map. */
209 LABEL_DECL_UID (expr) = -1;
210 }
211
212 if (TREE_CODE (expr) == FIELD_DECL)
213 {
214 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
215 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
216 expr->decl_common.off_align = bp_unpack_value (bp, 8);
217 }
218
219 if (TREE_CODE (expr) == RESULT_DECL
220 || TREE_CODE (expr) == PARM_DECL
221 || TREE_CODE (expr) == VAR_DECL)
222 {
223 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
224 if (TREE_CODE (expr) == VAR_DECL
225 || TREE_CODE (expr) == PARM_DECL)
226 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
227 DECL_RESTRICTED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
228 }
229}
230
231
232/* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
233 of expression EXPR from bitpack BP. */
234
235static void
236unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
237{
238 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
239}
240
241
242/* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
243 of expression EXPR from bitpack BP. */
244
245static void
246unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
247{
248 DECL_DEFER_OUTPUT (expr) = (unsigned) bp_unpack_value (bp, 1);
249 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
250 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
251 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
252 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
253 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1);
254 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2);
255 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1);
256
257 if (TREE_CODE (expr) == VAR_DECL)
258 {
259 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
260 DECL_IN_TEXT_SECTION (expr) = (unsigned) bp_unpack_value (bp, 1);
261 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
262 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3);
263 }
264
265 if (VAR_OR_FUNCTION_DECL_P (expr))
266 {
267 priority_type p;
268 p = (priority_type) bp_unpack_var_len_unsigned (bp);
269 SET_DECL_INIT_PRIORITY (expr, p);
270 }
271}
272
273
274/* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
275 of expression EXPR from bitpack BP. */
276
277static void
278unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
279{
280 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
281 BUILT_IN_LAST);
282 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
283 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
284 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
285 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
286 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
287 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
288 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
289 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
290 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
291 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
292 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
293 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
294 = (unsigned) bp_unpack_value (bp, 1);
295 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
296 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
297 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
298 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
299 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
300 {
301 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
302 11);
303 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
304 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
305 fatal_error ("machine independent builtin code out of range");
306 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
307 {
308 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
309 if (!result || result == error_mark_node)
310 fatal_error ("target specific builtin not available");
311 }
312 }
313 if (DECL_STATIC_DESTRUCTOR (expr))
314 {
315 priority_type p;
316 p = (priority_type) bp_unpack_var_len_unsigned (bp);
317 SET_DECL_FINI_PRIORITY (expr, p);
318 }
319}
320
321
322/* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
323 of expression EXPR from bitpack BP. */
324
325static void
326unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
327{
328 enum machine_mode mode;
329
330 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
331 SET_TYPE_MODE (expr, mode);
332 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
333 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
334 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
335 if (RECORD_OR_UNION_TYPE_P (expr))
336 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
5ce9237c
JM
337 else if (TREE_CODE (expr) == ARRAY_TYPE)
338 TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
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JM
339 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
340 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
341 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr)
342 = (unsigned) bp_unpack_value (bp, 2);
343 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
344 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
345 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
346 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
347 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
348}
349
350
351/* Unpack all the non-pointer fields of the TS_BLOCK structure
352 of expression EXPR from bitpack BP. */
353
354static void
355unpack_ts_block_value_fields (struct bitpack_d *bp, tree expr)
356{
357 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
358 /* BLOCK_NUMBER is recomputed. */
359}
360
361/* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
362 structure of expression EXPR from bitpack BP. */
363
364static void
365unpack_ts_translation_unit_decl_value_fields (struct bitpack_d *bp ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED)
366{
367}
368
369/* Unpack all the non-pointer fields in EXPR into a bit pack. */
370
371static void
372unpack_value_fields (struct bitpack_d *bp, tree expr)
373{
374 enum tree_code code;
375
376 code = TREE_CODE (expr);
377
378 /* Note that all these functions are highly sensitive to changes in
379 the types and sizes of each of the fields being packed. */
380 unpack_ts_base_value_fields (bp, expr);
381
382 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
383 unpack_ts_real_cst_value_fields (bp, expr);
384
385 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
386 unpack_ts_fixed_cst_value_fields (bp, expr);
387
388 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
389 unpack_ts_decl_common_value_fields (bp, expr);
390
391 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
392 unpack_ts_decl_wrtl_value_fields (bp, expr);
393
394 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
395 unpack_ts_decl_with_vis_value_fields (bp, expr);
396
397 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
398 unpack_ts_function_decl_value_fields (bp, expr);
399
400 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
401 unpack_ts_type_common_value_fields (bp, expr);
402
403 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
404 unpack_ts_block_value_fields (bp, expr);
405
406 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
407 unpack_ts_translation_unit_decl_value_fields (bp, expr);
408}
409
410
411/* Read all the language-independent bitfield values for EXPR from IB.
412 Return the partially unpacked bitpack so the caller can unpack any other
413 bitfield values that the writer may have written. */
414
415struct bitpack_d
416streamer_read_tree_bitfields (struct lto_input_block *ib, tree expr)
417{
418 enum tree_code code;
419 struct bitpack_d bp;
420
421 /* Read the bitpack of non-pointer values from IB. */
422 bp = streamer_read_bitpack (ib);
423
424 /* The first word in BP contains the code of the tree that we
425 are about to read. */
426 code = (enum tree_code) bp_unpack_value (&bp, 16);
427 lto_tag_check (lto_tree_code_to_tag (code),
428 lto_tree_code_to_tag (TREE_CODE (expr)));
429
430 /* Unpack all the value fields from BP. */
431 unpack_value_fields (&bp, expr);
432
433 return bp;
434}
435
436
437/* Materialize a new tree from input block IB using descriptors in
438 DATA_IN. The code for the new tree should match TAG. Store in
439 *IX_P the index into the reader cache where the new tree is stored. */
440
441tree
442streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
443 enum LTO_tags tag)
444{
445 enum tree_code code;
446 tree result;
447#ifdef LTO_STREAMER_DEBUG
448 HOST_WIDEST_INT orig_address_in_writer;
449#endif
450
451 result = NULL_TREE;
452
453#ifdef LTO_STREAMER_DEBUG
454 /* Read the word representing the memory address for the tree
455 as it was written by the writer. This is useful when
456 debugging differences between the writer and reader. */
457 orig_address_in_writer = streamer_read_hwi (ib);
458 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
459#endif
460
461 code = lto_tag_to_tree_code (tag);
462
463 /* We should never see an SSA_NAME tree. Only the version numbers of
464 SSA names are ever written out. See input_ssa_names. */
465 gcc_assert (code != SSA_NAME);
466
467 /* Instantiate a new tree using the header data. */
468 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
469 result = streamer_read_string_cst (data_in, ib);
470 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
471 result = input_identifier (data_in, ib);
472 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
473 {
474 HOST_WIDE_INT len = streamer_read_hwi (ib);
475 result = make_tree_vec (len);
476 }
477 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
478 {
479 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
480 result = make_tree_binfo (len);
481 }
482 else if (code == CALL_EXPR)
483 {
484 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
485 return build_vl_exp (CALL_EXPR, nargs + 3);
486 }
487 else
488 {
489 /* For all other nodes, materialize the tree with a raw
490 make_node call. */
491 result = make_node (code);
492 }
493
494#ifdef LTO_STREAMER_DEBUG
495 /* Store the original address of the tree as seen by the writer
496 in RESULT's aux field. This is useful when debugging streaming
497 problems. This way, a debugging session can be started on
498 both writer and reader with a breakpoint using this address
499 value in both. */
500 lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
501#endif
502
503 return result;
504}
505
506
507/* Read all pointer fields in the TS_COMMON structure of EXPR from input
508 block IB. DATA_IN contains tables and descriptors for the
509 file being read. */
510
511
512static void
513lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
514 struct data_in *data_in, tree expr)
515{
516 if (TREE_CODE (expr) != IDENTIFIER_NODE)
517 TREE_TYPE (expr) = stream_read_tree (ib, data_in);
518}
519
520
521/* Read all pointer fields in the TS_VECTOR structure of EXPR from input
522 block IB. DATA_IN contains tables and descriptors for the
523 file being read. */
524
525static void
526lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
527 struct data_in *data_in, tree expr)
528{
529 TREE_VECTOR_CST_ELTS (expr) = streamer_read_chain (ib, data_in);
530}
531
532
533/* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
534 block IB. DATA_IN contains tables and descriptors for the
535 file being read. */
536
537static void
538lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
539 struct data_in *data_in, tree expr)
540{
541 TREE_REALPART (expr) = stream_read_tree (ib, data_in);
542 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
543}
544
545
546/* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
547 from input block IB. DATA_IN contains tables and descriptors for the
548 file being read. */
549
550static void
551lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
552 struct data_in *data_in, tree expr)
553{
554 DECL_NAME (expr) = stream_read_tree (ib, data_in);
555 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
556 DECL_SOURCE_LOCATION (expr) = lto_input_location (ib, data_in);
557}
558
559
560/* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
561 input block IB. DATA_IN contains tables and descriptors for the
562 file being read. */
563
564static void
565lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
566 struct data_in *data_in, tree expr)
567{
568 DECL_SIZE (expr) = stream_read_tree (ib, data_in);
569 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
570 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
571
572 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information
573 for early inlining so drop it on the floor instead of ICEing in
574 dwarf2out.c. */
575
576 if (TREE_CODE (expr) == PARM_DECL)
577 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
578
579 if ((TREE_CODE (expr) == VAR_DECL
580 || TREE_CODE (expr) == PARM_DECL)
581 && DECL_HAS_VALUE_EXPR_P (expr))
582 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
583
584 if (TREE_CODE (expr) == VAR_DECL)
585 {
586 tree dexpr = stream_read_tree (ib, data_in);
587 if (dexpr)
588 SET_DECL_DEBUG_EXPR (expr, dexpr);
589 }
590}
591
592
593/* Read all pointer fields in the TS_DECL_NON_COMMON structure of
594 EXPR from input block IB. DATA_IN contains tables and descriptors for the
595 file being read. */
596
597static void
598lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
599 struct data_in *data_in, tree expr)
600{
601 if (TREE_CODE (expr) == FUNCTION_DECL)
602 {
603 DECL_ARGUMENTS (expr) = stream_read_tree (ib, data_in);
604 DECL_RESULT (expr) = stream_read_tree (ib, data_in);
605 }
606 else if (TREE_CODE (expr) == TYPE_DECL)
607 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
608 DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
609}
610
611
612/* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
613 from input block IB. DATA_IN contains tables and descriptors for the
614 file being read. */
615
616static void
617lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
618 struct data_in *data_in, tree expr)
619{
620 tree id;
621
622 id = stream_read_tree (ib, data_in);
623 if (id)
624 {
625 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
626 SET_DECL_ASSEMBLER_NAME (expr, id);
627 }
628
629 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
630 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
631}
632
633
634/* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
635 input block IB. DATA_IN contains tables and descriptors for the
636 file being read. */
637
638static void
639lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
640 struct data_in *data_in, tree expr)
641{
642 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
643 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
644 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
645 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
646 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
647}
648
649
650/* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
651 from input block IB. DATA_IN contains tables and descriptors for the
652 file being read. */
653
654static void
655lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
656 struct data_in *data_in, tree expr)
657{
658 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto,
659 maybe it should be handled here? */
660 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
661 DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
662 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
663
664 /* If the file contains a function with an EH personality set,
665 then it was compiled with -fexceptions. In that case, initialize
666 the backend EH machinery. */
667 if (DECL_FUNCTION_PERSONALITY (expr))
668 lto_init_eh ();
669}
670
671
672/* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
673 input block IB. DATA_IN contains tables and descriptors for the file
674 being read. */
675
676static void
677lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
678 struct data_in *data_in, tree expr)
679{
680 TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
681 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
682 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
683 TYPE_NAME (expr) = stream_read_tree (ib, data_in);
684 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be
685 reconstructed during fixup. */
686 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
687 during fixup. */
688 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
689 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
690 /* TYPE_CANONICAL gets re-computed during type merging. */
691 TYPE_CANONICAL (expr) = NULL_TREE;
692 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
693}
694
695/* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
696 from input block IB. DATA_IN contains tables and descriptors for the
697 file being read. */
698
699static void
700lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
701 struct data_in *data_in,
702 tree expr)
703{
704 if (TREE_CODE (expr) == ENUMERAL_TYPE)
705 TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
706 else if (TREE_CODE (expr) == ARRAY_TYPE)
707 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
708 else if (RECORD_OR_UNION_TYPE_P (expr))
709 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
710 else if (TREE_CODE (expr) == FUNCTION_TYPE
711 || TREE_CODE (expr) == METHOD_TYPE)
712 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
713
714 if (!POINTER_TYPE_P (expr))
715 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
716 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
717 if (RECORD_OR_UNION_TYPE_P (expr))
718 TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
719}
720
721
722/* Read all pointer fields in the TS_LIST structure of EXPR from input
723 block IB. DATA_IN contains tables and descriptors for the
724 file being read. */
725
726static void
727lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
728 struct data_in *data_in, tree expr)
729{
730 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
731 TREE_VALUE (expr) = stream_read_tree (ib, data_in);
732 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
733}
734
735
736/* Read all pointer fields in the TS_VEC structure of EXPR from input
737 block IB. DATA_IN contains tables and descriptors for the
738 file being read. */
739
740static void
741lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
742 struct data_in *data_in, tree expr)
743{
744 int i;
745
746 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
747 instantiate EXPR. */
748 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
749 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
750}
751
752
753/* Read all pointer fields in the TS_EXP structure of EXPR from input
754 block IB. DATA_IN contains tables and descriptors for the
755 file being read. */
756
757
758static void
759lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
760 struct data_in *data_in, tree expr)
761{
762 int i, length;
763 location_t loc;
764
765 length = streamer_read_hwi (ib);
766 gcc_assert (length == TREE_OPERAND_LENGTH (expr));
767
768 for (i = 0; i < length; i++)
769 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
770
771 loc = lto_input_location (ib, data_in);
772 SET_EXPR_LOCATION (expr, loc);
773 TREE_BLOCK (expr) = stream_read_tree (ib, data_in);
774}
775
776
777/* Read all pointer fields in the TS_BLOCK structure of EXPR from input
778 block IB. DATA_IN contains tables and descriptors for the
779 file being read. */
780
781static void
782lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
783 struct data_in *data_in, tree expr)
784{
785 /* Do not stream BLOCK_SOURCE_LOCATION. We cannot handle debug information
786 for early inlining so drop it on the floor instead of ICEing in
787 dwarf2out.c. */
788 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
789
790 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
791 for early inlining so drop it on the floor instead of ICEing in
792 dwarf2out.c. */
793
794 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
795
796 /* Do not stream BLOCK_ABSTRACT_ORIGIN. We cannot handle debug information
797 for early inlining so drop it on the floor instead of ICEing in
798 dwarf2out.c. */
799 BLOCK_FRAGMENT_ORIGIN (expr) = stream_read_tree (ib, data_in);
800 BLOCK_FRAGMENT_CHAIN (expr) = stream_read_tree (ib, data_in);
801
802 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
803 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
804 stream the child relationship explicitly. */
805 if (BLOCK_SUPERCONTEXT (expr)
806 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
807 {
808 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
809 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
810 }
811
812 /* The global block is rooted at the TU decl. Hook it here to
813 avoid the need to stream in this block during WPA time. */
814 else if (BLOCK_SUPERCONTEXT (expr)
815 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
816 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
817
818 /* The function-level block is connected at the time we read in
819 function bodies for the same reason. */
820}
821
822
823/* Read all pointer fields in the TS_BINFO structure of EXPR from input
824 block IB. DATA_IN contains tables and descriptors for the
825 file being read. */
826
827static void
828lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
829 struct data_in *data_in, tree expr)
830{
831 unsigned i, len;
832 tree t;
833
834 /* Note that the number of slots in EXPR was read in
835 streamer_alloc_tree when instantiating EXPR. However, the
836 vector is empty so we cannot rely on VEC_length to know how many
837 elements to read. So, this list is emitted as a 0-terminated
838 list on the writer side. */
839 do
840 {
841 t = stream_read_tree (ib, data_in);
842 if (t)
843 VEC_quick_push (tree, BINFO_BASE_BINFOS (expr), t);
844 }
845 while (t);
846
847 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
848 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
849 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
850
851 len = streamer_read_uhwi (ib);
852 if (len > 0)
853 {
854 VEC_reserve_exact (tree, gc, BINFO_BASE_ACCESSES (expr), len);
855 for (i = 0; i < len; i++)
856 {
857 tree a = stream_read_tree (ib, data_in);
858 VEC_quick_push (tree, BINFO_BASE_ACCESSES (expr), a);
859 }
860 }
861
862 BINFO_INHERITANCE_CHAIN (expr) = stream_read_tree (ib, data_in);
863 BINFO_SUBVTT_INDEX (expr) = stream_read_tree (ib, data_in);
864 BINFO_VPTR_INDEX (expr) = stream_read_tree (ib, data_in);
865}
866
867
868/* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
869 input block IB. DATA_IN contains tables and descriptors for the
870 file being read. */
871
872static void
873lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
874 struct data_in *data_in, tree expr)
875{
876 unsigned i, len;
877
878 len = streamer_read_uhwi (ib);
879 for (i = 0; i < len; i++)
880 {
881 tree index, value;
882
883 index = stream_read_tree (ib, data_in);
884 value = stream_read_tree (ib, data_in);
885 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (expr), index, value);
886 }
887}
888
889
890/* Input a TS_TARGET_OPTION tree from IB into EXPR. */
891
892static void
893lto_input_ts_target_option (struct lto_input_block *ib, tree expr)
894{
895 unsigned i, len;
896 struct bitpack_d bp;
897 struct cl_target_option *t = TREE_TARGET_OPTION (expr);
898
899 bp = streamer_read_bitpack (ib);
900 len = sizeof (struct cl_target_option);
901 for (i = 0; i < len; i++)
902 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
903 if (bp_unpack_value (&bp, 32) != 0x12345678)
904 fatal_error ("cl_target_option size mismatch in LTO reader and writer");
905}
906
907/* Input a TS_OPTIMIZATION tree from IB into EXPR. */
908
909static void
910lto_input_ts_optimization (struct lto_input_block *ib, tree expr)
911{
912 unsigned i, len;
913 struct bitpack_d bp;
914 struct cl_optimization *t = TREE_OPTIMIZATION (expr);
915
916 bp = streamer_read_bitpack (ib);
917 len = sizeof (struct cl_optimization);
918 for (i = 0; i < len; i++)
919 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
920 if (bp_unpack_value (&bp, 32) != 0x12345678)
921 fatal_error ("cl_optimization size mismatch in LTO reader and writer");
922}
923
924/* Input a TS_TRANSLATION_UNIT_DECL tree from IB and DATA_IN into EXPR. */
925
926static void
927lto_input_ts_translation_unit_decl_tree_pointers (struct lto_input_block *ib,
928 struct data_in *data_in,
929 tree expr)
930{
931 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (streamer_read_string (data_in, ib));
932 VEC_safe_push (tree, gc, all_translation_units, expr);
933}
934
935/* Read all pointer fields in EXPR from input block IB. DATA_IN
936 contains tables and descriptors for the file being read. */
937
938void
939streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
940 tree expr)
941{
942 enum tree_code code;
943
944 code = TREE_CODE (expr);
945
946 if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
947 lto_input_ts_common_tree_pointers (ib, data_in, expr);
948
949 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
950 lto_input_ts_vector_tree_pointers (ib, data_in, expr);
951
952 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
953 lto_input_ts_complex_tree_pointers (ib, data_in, expr);
954
955 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
956 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
957
958 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
959 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
960
961 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
962 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
963
964 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
965 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
966
967 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
968 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
969
970 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
971 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
972
973 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
974 lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
975
976 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
977 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
978
979 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
980 lto_input_ts_list_tree_pointers (ib, data_in, expr);
981
982 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
983 lto_input_ts_vec_tree_pointers (ib, data_in, expr);
984
985 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
986 lto_input_ts_exp_tree_pointers (ib, data_in, expr);
987
988 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
989 lto_input_ts_block_tree_pointers (ib, data_in, expr);
990
991 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
992 lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
993
994 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
995 lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
996
997 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
998 lto_input_ts_target_option (ib, expr);
999
1000 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
1001 lto_input_ts_optimization (ib, expr);
1002
1003 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
1004 lto_input_ts_translation_unit_decl_tree_pointers (ib, data_in, expr);
1005}
1006
1007
1008/* Read and INTEGER_CST node from input block IB using the per-file
1009 context in DATA_IN. */
1010
1011tree
1012streamer_read_integer_cst (struct lto_input_block *ib, struct data_in *data_in)
1013{
1014 tree result, type;
1015 HOST_WIDE_INT low, high;
1016 bool overflow_p;
1017
1018 type = stream_read_tree (ib, data_in);
1019 overflow_p = (streamer_read_uchar (ib) != 0);
1020 low = streamer_read_uhwi (ib);
1021 high = streamer_read_uhwi (ib);
1022 result = build_int_cst_wide (type, low, high);
1023
1024 /* If the original constant had overflown, build a replica of RESULT to
1025 avoid modifying the shared constant returned by build_int_cst_wide. */
1026 if (overflow_p)
1027 {
1028 result = copy_node (result);
1029 TREE_OVERFLOW (result) = 1;
1030 }
1031
1032 return result;
1033}
1034
1035
1036/* Read an index IX from input block IB and return the tree node at
1037 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */
1038
1039tree
1040streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1041{
1042 unsigned HOST_WIDE_INT ix;
1043 tree result;
1044 enum LTO_tags expected_tag;
1045
1046 ix = streamer_read_uhwi (ib);
1047 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1048
1049 result = streamer_tree_cache_get (data_in->reader_cache, ix);
1050 gcc_assert (result
1051 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1052
1053 return result;
1054}
1055
1056
1057/* Read a code and class from input block IB and return the
1058 corresponding builtin. DATA_IN is as in stream_read_tree. */
1059
1060tree
1061streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1062{
1063 enum built_in_class fclass;
1064 enum built_in_function fcode;
1065 const char *asmname;
1066 tree result;
1067
1068 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1069 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1070
1071 fcode = (enum built_in_function) streamer_read_uhwi (ib);
1072
1073 if (fclass == BUILT_IN_NORMAL)
1074 {
1075 if (fcode >= END_BUILTINS)
1076 fatal_error ("machine independent builtin code out of range");
1077 result = builtin_decl_explicit (fcode);
1078 gcc_assert (result);
1079 }
1080 else if (fclass == BUILT_IN_MD)
1081 {
1082 result = targetm.builtin_decl (fcode, true);
1083 if (!result || result == error_mark_node)
1084 fatal_error ("target specific builtin not available");
1085 }
1086 else
1087 gcc_unreachable ();
1088
1089 asmname = streamer_read_string (data_in, ib);
1090 if (asmname)
1091 set_builtin_user_assembler_name (result, asmname);
1092
1093 streamer_tree_cache_append (data_in->reader_cache, result);
1094
1095 return result;
1096}