Daily bump.
[official-gcc.git] / gcc / tree-streamer-in.c
blob1839f579e9680d11897e24ecd6f107fa7d0909d6
1 /* Routines for reading trees from a file stream.
3 Copyright (C) 2011-2014 Free Software Foundation, Inc.
4 Contributed by Diego Novillo <dnovillo@google.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "diagnostic.h"
26 #include "tree.h"
27 #include "stringpool.h"
28 #include "basic-block.h"
29 #include "tree-ssa-alias.h"
30 #include "internal-fn.h"
31 #include "gimple-expr.h"
32 #include "is-a.h"
33 #include "gimple.h"
34 #include "tree-streamer.h"
35 #include "data-streamer.h"
36 #include "streamer-hooks.h"
37 #include "lto-streamer.h"
39 /* Read a STRING_CST from the string table in DATA_IN using input
40 block IB. */
42 tree
43 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
45 unsigned int len;
46 const char * ptr;
48 ptr = streamer_read_indexed_string (data_in, ib, &len);
49 if (!ptr)
50 return NULL;
51 return build_string (len, ptr);
55 /* Read an IDENTIFIER from the string table in DATA_IN using input
56 block IB. */
58 static tree
59 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
61 unsigned int len;
62 const char *ptr;
64 ptr = streamer_read_indexed_string (data_in, ib, &len);
65 if (!ptr)
66 return NULL;
67 return get_identifier_with_length (ptr, len);
71 /* Read a chain of tree nodes from input block IB. DATA_IN contains
72 tables and descriptors for the file being read. */
74 tree
75 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
77 tree first, prev, curr;
79 /* The chain is written as NULL terminated list of trees. */
80 first = prev = NULL_TREE;
83 curr = stream_read_tree (ib, data_in);
84 if (prev)
85 TREE_CHAIN (prev) = curr;
86 else
87 first = curr;
89 prev = curr;
91 while (curr);
93 return first;
97 /* Unpack all the non-pointer fields of the TS_BASE structure of
98 expression EXPR from bitpack BP. */
100 static void
101 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
103 /* Note that the code for EXPR has already been unpacked to create EXPR in
104 streamer_alloc_tree. */
105 if (!TYPE_P (expr))
107 TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
108 TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
109 TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
111 /* TREE_PUBLIC is used on types to indicate that the type
112 has a TYPE_CACHED_VALUES vector. This is not streamed out,
113 so we skip it here. */
114 TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
116 else
117 bp_unpack_value (bp, 4);
118 TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
119 TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
120 if (DECL_P (expr))
121 DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
122 else if (TYPE_P (expr))
123 TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
124 else
125 bp_unpack_value (bp, 1);
126 TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
127 if (TYPE_P (expr))
128 TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
129 else
130 TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
131 TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
132 TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
133 if (TREE_CODE (expr) != TREE_BINFO)
134 TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
135 TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
136 TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
137 if (TYPE_P (expr))
139 TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
140 TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
142 else if (TREE_CODE (expr) == SSA_NAME)
143 SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
144 else
145 bp_unpack_value (bp, 1);
149 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
150 expression EXPR from bitpack BP. */
152 static void
153 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
155 TREE_INT_CST_LOW (expr) = bp_unpack_var_len_unsigned (bp);
156 TREE_INT_CST_HIGH (expr) = bp_unpack_var_len_int (bp);
160 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
161 expression EXPR from bitpack BP. */
163 static void
164 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
166 unsigned i;
167 REAL_VALUE_TYPE r;
168 REAL_VALUE_TYPE *rp;
170 /* Clear all bits of the real value type so that we can later do
171 bitwise comparisons to see if two values are the same. */
172 memset (&r, 0, sizeof r);
173 r.cl = (unsigned) bp_unpack_value (bp, 2);
174 r.decimal = (unsigned) bp_unpack_value (bp, 1);
175 r.sign = (unsigned) bp_unpack_value (bp, 1);
176 r.signalling = (unsigned) bp_unpack_value (bp, 1);
177 r.canonical = (unsigned) bp_unpack_value (bp, 1);
178 r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
179 for (i = 0; i < SIGSZ; i++)
180 r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
182 rp = ggc_alloc_real_value ();
183 memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
184 TREE_REAL_CST_PTR (expr) = rp;
188 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
189 expression EXPR from bitpack BP. */
191 static void
192 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
194 FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value ();
195 fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
196 fp->data.low = bp_unpack_var_len_int (bp);
197 fp->data.high = bp_unpack_var_len_int (bp);
198 TREE_FIXED_CST_PTR (expr) = fp;
201 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
202 of expression EXPR from bitpack BP. */
204 static void
205 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
207 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
208 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
209 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
210 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
211 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
212 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
213 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
214 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
215 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
216 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
217 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
219 if (TREE_CODE (expr) == LABEL_DECL)
221 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
223 /* Always assume an initial value of -1 for LABEL_DECL_UID to
224 force gimple_set_bb to recreate label_to_block_map. */
225 LABEL_DECL_UID (expr) = -1;
228 if (TREE_CODE (expr) == FIELD_DECL)
230 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
231 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
232 expr->decl_common.off_align = bp_unpack_value (bp, 8);
235 if (TREE_CODE (expr) == VAR_DECL)
237 DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
238 DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
241 if (TREE_CODE (expr) == RESULT_DECL
242 || TREE_CODE (expr) == PARM_DECL
243 || TREE_CODE (expr) == VAR_DECL)
245 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
246 if (TREE_CODE (expr) == VAR_DECL
247 || TREE_CODE (expr) == PARM_DECL)
248 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
253 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
254 of expression EXPR from bitpack BP. */
256 static void
257 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
259 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
263 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
264 of expression EXPR from bitpack BP. */
266 static void
267 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
269 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
270 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
271 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
272 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
273 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1);
274 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2);
275 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1);
277 if (TREE_CODE (expr) == VAR_DECL)
279 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
280 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
281 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3);
284 if (TREE_CODE (expr) == FUNCTION_DECL)
286 DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
287 DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
288 DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
290 if (VAR_OR_FUNCTION_DECL_P (expr))
292 priority_type p;
293 p = (priority_type) bp_unpack_var_len_unsigned (bp);
294 SET_DECL_INIT_PRIORITY (expr, p);
299 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
300 of expression EXPR from bitpack BP. */
302 static void
303 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
305 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
306 BUILT_IN_LAST);
307 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
308 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
309 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
310 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
311 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
312 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
313 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
314 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
315 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
316 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
317 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
318 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
319 = (unsigned) bp_unpack_value (bp, 1);
320 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
321 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
322 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
323 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
324 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
326 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
327 11);
328 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
329 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
330 fatal_error ("machine independent builtin code out of range");
331 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
333 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
334 if (!result || result == error_mark_node)
335 fatal_error ("target specific builtin not available");
338 if (DECL_STATIC_DESTRUCTOR (expr))
340 priority_type p;
341 p = (priority_type) bp_unpack_var_len_unsigned (bp);
342 SET_DECL_FINI_PRIORITY (expr, p);
347 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
348 of expression EXPR from bitpack BP. */
350 static void
351 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
353 enum machine_mode mode;
355 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
356 SET_TYPE_MODE (expr, mode);
357 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
358 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
359 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
360 if (RECORD_OR_UNION_TYPE_P (expr))
362 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
363 TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
365 else if (TREE_CODE (expr) == ARRAY_TYPE)
366 TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
367 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
368 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
369 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
370 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
371 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
372 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
373 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
377 /* Unpack all the non-pointer fields of the TS_BLOCK structure
378 of expression EXPR from bitpack BP. */
380 static void
381 unpack_ts_block_value_fields (struct data_in *data_in,
382 struct bitpack_d *bp, tree expr)
384 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
385 /* BLOCK_NUMBER is recomputed. */
386 BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
389 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
390 structure of expression EXPR from bitpack BP. */
392 static void
393 unpack_ts_translation_unit_decl_value_fields (struct data_in *data_in,
394 struct bitpack_d *bp, tree expr)
396 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
397 vec_safe_push (all_translation_units, expr);
400 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR. */
402 static void
403 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
405 unsigned i, len;
406 struct cl_optimization *t = TREE_OPTIMIZATION (expr);
408 len = sizeof (struct cl_optimization);
409 for (i = 0; i < len; i++)
410 ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
411 if (bp_unpack_value (bp, 32) != 0x12345678)
412 fatal_error ("cl_optimization size mismatch in LTO reader and writer");
416 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
417 structure of expression EXPR from bitpack BP. */
419 static void
420 unpack_ts_omp_clause_value_fields (struct data_in *data_in,
421 struct bitpack_d *bp, tree expr)
423 OMP_CLAUSE_LOCATION (expr) = stream_input_location (bp, data_in);
424 switch (OMP_CLAUSE_CODE (expr))
426 case OMP_CLAUSE_DEFAULT:
427 OMP_CLAUSE_DEFAULT_KIND (expr)
428 = bp_unpack_enum (bp, omp_clause_default_kind,
429 OMP_CLAUSE_DEFAULT_LAST);
430 break;
431 case OMP_CLAUSE_SCHEDULE:
432 OMP_CLAUSE_SCHEDULE_KIND (expr)
433 = bp_unpack_enum (bp, omp_clause_schedule_kind,
434 OMP_CLAUSE_SCHEDULE_LAST);
435 break;
436 case OMP_CLAUSE_DEPEND:
437 OMP_CLAUSE_DEPEND_KIND (expr)
438 = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
439 break;
440 case OMP_CLAUSE_MAP:
441 OMP_CLAUSE_MAP_KIND (expr)
442 = bp_unpack_enum (bp, omp_clause_map_kind, OMP_CLAUSE_MAP_LAST);
443 break;
444 case OMP_CLAUSE_PROC_BIND:
445 OMP_CLAUSE_PROC_BIND_KIND (expr)
446 = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
447 OMP_CLAUSE_PROC_BIND_LAST);
448 break;
449 case OMP_CLAUSE_REDUCTION:
450 OMP_CLAUSE_REDUCTION_CODE (expr)
451 = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
452 break;
453 default:
454 break;
458 /* Unpack all the non-pointer fields in EXPR into a bit pack. */
460 static void
461 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
463 enum tree_code code;
465 code = TREE_CODE (expr);
467 /* Note that all these functions are highly sensitive to changes in
468 the types and sizes of each of the fields being packed. */
469 unpack_ts_base_value_fields (bp, expr);
471 if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
472 unpack_ts_int_cst_value_fields (bp, expr);
474 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
475 unpack_ts_real_cst_value_fields (bp, expr);
477 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
478 unpack_ts_fixed_cst_value_fields (bp, expr);
480 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
481 DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
483 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
484 unpack_ts_decl_common_value_fields (bp, expr);
486 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
487 unpack_ts_decl_wrtl_value_fields (bp, expr);
489 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
490 unpack_ts_decl_with_vis_value_fields (bp, expr);
492 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
493 unpack_ts_function_decl_value_fields (bp, expr);
495 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
496 unpack_ts_type_common_value_fields (bp, expr);
498 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
499 SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
501 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
502 unpack_ts_block_value_fields (data_in, bp, expr);
504 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
505 unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
507 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
508 gcc_unreachable ();
510 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
511 unpack_ts_optimization (bp, expr);
513 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
515 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
516 if (length > 0)
517 vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
520 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
522 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
523 if (length > 0)
524 vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
527 if (code == OMP_CLAUSE)
528 unpack_ts_omp_clause_value_fields (data_in, bp, expr);
532 /* Read all the language-independent bitfield values for EXPR from IB.
533 Return the partially unpacked bitpack so the caller can unpack any other
534 bitfield values that the writer may have written. */
536 struct bitpack_d
537 streamer_read_tree_bitfields (struct lto_input_block *ib,
538 struct data_in *data_in, tree expr)
540 enum tree_code code;
541 struct bitpack_d bp;
543 /* Read the bitpack of non-pointer values from IB. */
544 bp = streamer_read_bitpack (ib);
546 /* The first word in BP contains the code of the tree that we
547 are about to read. */
548 code = (enum tree_code) bp_unpack_value (&bp, 16);
549 lto_tag_check (lto_tree_code_to_tag (code),
550 lto_tree_code_to_tag (TREE_CODE (expr)));
552 /* Unpack all the value fields from BP. */
553 unpack_value_fields (data_in, &bp, expr);
555 return bp;
559 /* Materialize a new tree from input block IB using descriptors in
560 DATA_IN. The code for the new tree should match TAG. Store in
561 *IX_P the index into the reader cache where the new tree is stored. */
563 tree
564 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
565 enum LTO_tags tag)
567 enum tree_code code;
568 tree result;
569 #ifdef LTO_STREAMER_DEBUG
570 HOST_WIDEST_INT orig_address_in_writer;
571 #endif
573 result = NULL_TREE;
575 #ifdef LTO_STREAMER_DEBUG
576 /* Read the word representing the memory address for the tree
577 as it was written by the writer. This is useful when
578 debugging differences between the writer and reader. */
579 orig_address_in_writer = streamer_read_hwi (ib);
580 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
581 #endif
583 code = lto_tag_to_tree_code (tag);
585 /* We should never see an SSA_NAME tree. Only the version numbers of
586 SSA names are ever written out. See input_ssa_names. */
587 gcc_assert (code != SSA_NAME);
589 /* Instantiate a new tree using the header data. */
590 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
591 result = streamer_read_string_cst (data_in, ib);
592 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
593 result = input_identifier (data_in, ib);
594 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
596 HOST_WIDE_INT len = streamer_read_hwi (ib);
597 result = make_tree_vec (len);
599 else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
601 HOST_WIDE_INT len = streamer_read_hwi (ib);
602 result = make_vector (len);
604 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
606 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
607 result = make_tree_binfo (len);
609 else if (code == CALL_EXPR)
611 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
612 return build_vl_exp (CALL_EXPR, nargs + 3);
614 else if (code == OMP_CLAUSE)
616 enum omp_clause_code subcode
617 = (enum omp_clause_code) streamer_read_uhwi (ib);
618 return build_omp_clause (UNKNOWN_LOCATION, subcode);
620 else
622 /* For all other nodes, materialize the tree with a raw
623 make_node call. */
624 result = make_node (code);
627 #ifdef LTO_STREAMER_DEBUG
628 /* Store the original address of the tree as seen by the writer
629 in RESULT's aux field. This is useful when debugging streaming
630 problems. This way, a debugging session can be started on
631 both writer and reader with a breakpoint using this address
632 value in both. */
633 lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
634 #endif
636 return result;
640 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
641 block IB. DATA_IN contains tables and descriptors for the
642 file being read. */
645 static void
646 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
647 struct data_in *data_in, tree expr)
649 if (TREE_CODE (expr) != IDENTIFIER_NODE)
650 TREE_TYPE (expr) = stream_read_tree (ib, data_in);
654 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
655 block IB. DATA_IN contains tables and descriptors for the
656 file being read. */
658 static void
659 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
660 struct data_in *data_in, tree expr)
662 unsigned i;
663 for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
664 VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
668 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
669 block IB. DATA_IN contains tables and descriptors for the
670 file being read. */
672 static void
673 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
674 struct data_in *data_in, tree expr)
676 TREE_REALPART (expr) = stream_read_tree (ib, data_in);
677 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
681 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
682 from input block IB. DATA_IN contains tables and descriptors for the
683 file being read. */
685 static void
686 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
687 struct data_in *data_in, tree expr)
689 DECL_NAME (expr) = stream_read_tree (ib, data_in);
690 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
694 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
695 input block IB. DATA_IN contains tables and descriptors for the
696 file being read. */
698 static void
699 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
700 struct data_in *data_in, tree expr)
702 DECL_SIZE (expr) = stream_read_tree (ib, data_in);
703 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
704 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
706 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information
707 for early inlining so drop it on the floor instead of ICEing in
708 dwarf2out.c. */
710 if ((TREE_CODE (expr) == VAR_DECL
711 || TREE_CODE (expr) == PARM_DECL)
712 && DECL_HAS_VALUE_EXPR_P (expr))
713 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
715 if (TREE_CODE (expr) == VAR_DECL)
717 tree dexpr = stream_read_tree (ib, data_in);
718 if (dexpr)
719 SET_DECL_DEBUG_EXPR (expr, dexpr);
724 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
725 EXPR from input block IB. DATA_IN contains tables and descriptors for the
726 file being read. */
728 static void
729 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
730 struct data_in *data_in, tree expr)
732 if (TREE_CODE (expr) == TYPE_DECL)
733 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
734 DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
738 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
739 from input block IB. DATA_IN contains tables and descriptors for the
740 file being read. */
742 static void
743 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
744 struct data_in *data_in, tree expr)
746 tree id;
748 id = stream_read_tree (ib, data_in);
749 if (id)
751 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
752 SET_DECL_ASSEMBLER_NAME (expr, id);
755 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
756 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
760 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
761 input block IB. DATA_IN contains tables and descriptors for the
762 file being read. */
764 static void
765 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
766 struct data_in *data_in, tree expr)
768 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
769 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
770 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
771 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
772 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
776 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
777 from input block IB. DATA_IN contains tables and descriptors for the
778 file being read. */
780 static void
781 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
782 struct data_in *data_in, tree expr)
784 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto,
785 maybe it should be handled here? */
786 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
787 /* DECL_FUNCTION_SPECIFIC_TARGET is regenerated from attributes. */
788 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
790 /* If the file contains a function with an EH personality set,
791 then it was compiled with -fexceptions. In that case, initialize
792 the backend EH machinery. */
793 if (DECL_FUNCTION_PERSONALITY (expr))
794 lto_init_eh ();
798 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
799 input block IB. DATA_IN contains tables and descriptors for the file
800 being read. */
802 static void
803 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
804 struct data_in *data_in, tree expr)
806 TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
807 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
808 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
809 TYPE_NAME (expr) = stream_read_tree (ib, data_in);
810 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be
811 reconstructed during fixup. */
812 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
813 during fixup. */
814 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
815 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
816 /* TYPE_CANONICAL gets re-computed during type merging. */
817 TYPE_CANONICAL (expr) = NULL_TREE;
818 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
821 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
822 from input block IB. DATA_IN contains tables and descriptors for the
823 file being read. */
825 static void
826 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
827 struct data_in *data_in,
828 tree expr)
830 if (TREE_CODE (expr) == ENUMERAL_TYPE)
831 TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
832 else if (TREE_CODE (expr) == ARRAY_TYPE)
833 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
834 else if (RECORD_OR_UNION_TYPE_P (expr))
835 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
836 else if (TREE_CODE (expr) == FUNCTION_TYPE
837 || TREE_CODE (expr) == METHOD_TYPE)
838 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
840 if (!POINTER_TYPE_P (expr))
841 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
842 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
843 if (RECORD_OR_UNION_TYPE_P (expr))
844 TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
848 /* Read all pointer fields in the TS_LIST structure of EXPR from input
849 block IB. DATA_IN contains tables and descriptors for the
850 file being read. */
852 static void
853 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
854 struct data_in *data_in, tree expr)
856 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
857 TREE_VALUE (expr) = stream_read_tree (ib, data_in);
858 TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
862 /* Read all pointer fields in the TS_VEC structure of EXPR from input
863 block IB. DATA_IN contains tables and descriptors for the
864 file being read. */
866 static void
867 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
868 struct data_in *data_in, tree expr)
870 int i;
872 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
873 instantiate EXPR. */
874 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
875 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
879 /* Read all pointer fields in the TS_EXP structure of EXPR from input
880 block IB. DATA_IN contains tables and descriptors for the
881 file being read. */
884 static void
885 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
886 struct data_in *data_in, tree expr)
888 int i;
890 for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
891 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
893 TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
897 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
898 block IB. DATA_IN contains tables and descriptors for the
899 file being read. */
901 static void
902 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
903 struct data_in *data_in, tree expr)
905 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
907 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
909 /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
910 the limited cases we can handle - those that represent inlined
911 function scopes. For the rest them on the floor instead of ICEing in
912 dwarf2out.c. */
913 BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
914 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
915 for early inlined BLOCKs so drop it on the floor instead of ICEing in
916 dwarf2out.c. */
918 /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
919 streaming time. */
921 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
922 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
923 stream the child relationship explicitly. */
924 if (BLOCK_SUPERCONTEXT (expr)
925 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
927 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
928 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
931 /* The global block is rooted at the TU decl. Hook it here to
932 avoid the need to stream in this block during WPA time. */
933 else if (BLOCK_SUPERCONTEXT (expr)
934 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
935 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
937 /* The function-level block is connected at the time we read in
938 function bodies for the same reason. */
942 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
943 block IB. DATA_IN contains tables and descriptors for the
944 file being read. */
946 static void
947 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
948 struct data_in *data_in, tree expr)
950 unsigned i;
951 tree t;
953 /* Note that the number of slots in EXPR was read in
954 streamer_alloc_tree when instantiating EXPR. However, the
955 vector is empty so we cannot rely on vec::length to know how many
956 elements to read. So, this list is emitted as a 0-terminated
957 list on the writer side. */
960 t = stream_read_tree (ib, data_in);
961 if (t)
962 BINFO_BASE_BINFOS (expr)->quick_push (t);
964 while (t);
966 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
967 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
968 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
970 /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
971 unpacking the bitfield section. */
972 for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
974 tree a = stream_read_tree (ib, data_in);
975 (*BINFO_BASE_ACCESSES (expr))[i] = a;
977 /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
978 and BINFO_VPTR_INDEX; these are used by C++ FE only. */
982 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
983 input block IB. DATA_IN contains tables and descriptors for the
984 file being read. */
986 static void
987 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
988 struct data_in *data_in, tree expr)
990 unsigned i;
992 for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
994 constructor_elt e;
995 e.index = stream_read_tree (ib, data_in);
996 e.value = stream_read_tree (ib, data_in);
997 (*CONSTRUCTOR_ELTS (expr))[i] = e;
1002 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1003 input block IB. DATA_IN contains tables and descriptors for the
1004 file being read. */
1006 static void
1007 lto_input_ts_omp_clause_tree_pointers (struct lto_input_block *ib,
1008 struct data_in *data_in, tree expr)
1010 int i;
1012 for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1013 OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
1014 OMP_CLAUSE_CHAIN (expr) = stream_read_tree (ib, data_in);
1018 /* Read all pointer fields in EXPR from input block IB. DATA_IN
1019 contains tables and descriptors for the file being read. */
1021 void
1022 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
1023 tree expr)
1025 enum tree_code code;
1027 code = TREE_CODE (expr);
1029 if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1030 lto_input_ts_common_tree_pointers (ib, data_in, expr);
1032 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1033 lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1035 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1036 lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1038 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1039 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1041 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1042 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1044 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1045 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1047 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1048 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1050 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1051 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1053 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1054 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1056 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1057 lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1059 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1060 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1062 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1063 lto_input_ts_list_tree_pointers (ib, data_in, expr);
1065 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1066 lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1068 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1069 lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1071 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1072 lto_input_ts_block_tree_pointers (ib, data_in, expr);
1074 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1075 lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1077 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1078 lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1080 if (code == OMP_CLAUSE)
1081 lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1085 /* Read an index IX from input block IB and return the tree node at
1086 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */
1088 tree
1089 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1091 unsigned HOST_WIDE_INT ix;
1092 tree result;
1093 enum LTO_tags expected_tag;
1095 ix = streamer_read_uhwi (ib);
1096 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1098 result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1099 gcc_assert (result
1100 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1102 return result;
1106 /* Read a code and class from input block IB and return the
1107 corresponding builtin. DATA_IN is as in stream_read_tree. */
1109 tree
1110 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1112 enum built_in_class fclass;
1113 enum built_in_function fcode;
1114 const char *asmname;
1115 tree result;
1117 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1118 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1120 fcode = (enum built_in_function) streamer_read_uhwi (ib);
1122 if (fclass == BUILT_IN_NORMAL)
1124 if (fcode >= END_BUILTINS)
1125 fatal_error ("machine independent builtin code out of range");
1126 result = builtin_decl_explicit (fcode);
1127 gcc_assert (result);
1129 else if (fclass == BUILT_IN_MD)
1131 result = targetm.builtin_decl (fcode, true);
1132 if (!result || result == error_mark_node)
1133 fatal_error ("target specific builtin not available");
1135 else
1136 gcc_unreachable ();
1138 asmname = streamer_read_string (data_in, ib);
1139 if (asmname)
1140 set_builtin_user_assembler_name (result, asmname);
1142 streamer_tree_cache_append (data_in->reader_cache, result, 0);
1144 return result;