1 /* Routines for reading trees from a file stream.
3 Copyright (C) 2011-2013 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
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
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/>. */
24 #include "coretypes.h"
25 #include "diagnostic.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"
33 /* Read a STRING_CST from the string table in DATA_IN using input
37 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
42 ptr = streamer_read_indexed_string (data_in, ib, &len);
45 return build_string (len, ptr);
49 /* Read an IDENTIFIER from the string table in DATA_IN using input
53 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
58 ptr = streamer_read_indexed_string (data_in, ib, &len);
61 return get_identifier_with_length (ptr, len);
65 /* Read a chain of tree nodes from input block IB. DATA_IN contains
66 tables and descriptors for the file being read. */
69 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
71 tree first, prev, curr;
73 /* The chain is written as NULL terminated list of trees. */
74 first = prev = NULL_TREE;
77 curr = stream_read_tree (ib, data_in);
79 TREE_CHAIN (prev) = curr;
91 /* Unpack all the non-pointer fields of the TS_BASE structure of
92 expression EXPR from bitpack BP. */
95 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
97 /* Note that the code for EXPR has already been unpacked to create EXPR in
98 streamer_alloc_tree. */
101 TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
102 TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
103 TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
105 /* TREE_PUBLIC is used on types to indicate that the type
106 has a TYPE_CACHED_VALUES vector. This is not streamed out,
107 so we skip it here. */
108 TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
111 bp_unpack_value (bp, 4);
112 TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
113 TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
115 DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
116 else if (TYPE_P (expr))
117 TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
119 bp_unpack_value (bp, 1);
120 TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
122 TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
124 TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
125 TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
126 TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
127 if (TREE_CODE (expr) != TREE_BINFO)
128 TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
129 TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
130 TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
133 TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
134 TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
136 else if (TREE_CODE (expr) == SSA_NAME)
137 SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
139 bp_unpack_value (bp, 1);
143 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
144 expression EXPR from bitpack BP. */
147 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
150 for (i = 0; i < TREE_INT_CST_NUNITS (expr); i++)
151 TREE_INT_CST_ELT (expr, i) = bp_unpack_var_len_int (bp);
155 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
156 expression EXPR from bitpack BP. */
159 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
165 r.cl = (unsigned) bp_unpack_value (bp, 2);
166 r.decimal = (unsigned) bp_unpack_value (bp, 1);
167 r.sign = (unsigned) bp_unpack_value (bp, 1);
168 r.signalling = (unsigned) bp_unpack_value (bp, 1);
169 r.canonical = (unsigned) bp_unpack_value (bp, 1);
170 r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
171 for (i = 0; i < SIGSZ; i++)
172 r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
174 rp = ggc_alloc_real_value ();
175 memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
176 TREE_REAL_CST_PTR (expr) = rp;
180 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
181 expression EXPR from bitpack BP. */
184 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
186 FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value ();
187 fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
188 fp->data.low = bp_unpack_var_len_int (bp);
189 fp->data.high = bp_unpack_var_len_int (bp);
190 TREE_FIXED_CST_PTR (expr) = fp;
193 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
194 of expression EXPR from bitpack BP. */
197 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
199 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
200 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
201 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
202 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
203 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
204 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
205 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
206 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
207 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
208 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
209 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
211 if (TREE_CODE (expr) == LABEL_DECL)
213 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
215 /* Always assume an initial value of -1 for LABEL_DECL_UID to
216 force gimple_set_bb to recreate label_to_block_map. */
217 LABEL_DECL_UID (expr) = -1;
220 if (TREE_CODE (expr) == FIELD_DECL)
222 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
223 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
224 expr->decl_common.off_align = bp_unpack_value (bp, 8);
227 if (TREE_CODE (expr) == VAR_DECL)
229 DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
230 DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
233 if (TREE_CODE (expr) == RESULT_DECL
234 || TREE_CODE (expr) == PARM_DECL
235 || TREE_CODE (expr) == VAR_DECL)
237 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
238 if (TREE_CODE (expr) == VAR_DECL
239 || TREE_CODE (expr) == PARM_DECL)
240 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
245 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
246 of expression EXPR from bitpack BP. */
249 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
251 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
255 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
256 of expression EXPR from bitpack BP. */
259 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
261 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
262 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
263 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
264 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
265 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1);
266 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2);
267 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1);
269 if (TREE_CODE (expr) == VAR_DECL)
271 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
272 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
273 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3);
276 if (TREE_CODE (expr) == FUNCTION_DECL)
278 DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
279 DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
280 DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
282 if (VAR_OR_FUNCTION_DECL_P (expr))
285 p = (priority_type) bp_unpack_var_len_unsigned (bp);
286 SET_DECL_INIT_PRIORITY (expr, p);
291 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
292 of expression EXPR from bitpack BP. */
295 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
297 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
299 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
300 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
301 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
302 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
303 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
304 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
305 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
306 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
307 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
308 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
309 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
310 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
311 = (unsigned) bp_unpack_value (bp, 1);
312 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
313 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
314 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
315 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
316 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
318 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
320 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
321 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
322 fatal_error ("machine independent builtin code out of range");
323 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
325 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
326 if (!result || result == error_mark_node)
327 fatal_error ("target specific builtin not available");
330 if (DECL_STATIC_DESTRUCTOR (expr))
333 p = (priority_type) bp_unpack_var_len_unsigned (bp);
334 SET_DECL_FINI_PRIORITY (expr, p);
339 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
340 of expression EXPR from bitpack BP. */
343 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
345 enum machine_mode mode;
347 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
348 SET_TYPE_MODE (expr, mode);
349 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
350 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
351 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
352 if (RECORD_OR_UNION_TYPE_P (expr))
354 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
355 TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
357 else if (TREE_CODE (expr) == ARRAY_TYPE)
358 TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
359 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
360 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
361 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
362 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
363 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
364 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
365 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
369 /* Unpack all the non-pointer fields of the TS_BLOCK structure
370 of expression EXPR from bitpack BP. */
373 unpack_ts_block_value_fields (struct data_in *data_in,
374 struct bitpack_d *bp, tree expr)
376 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
377 /* BLOCK_NUMBER is recomputed. */
378 BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
381 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
382 structure of expression EXPR from bitpack BP. */
385 unpack_ts_translation_unit_decl_value_fields (struct data_in *data_in,
386 struct bitpack_d *bp, tree expr)
388 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
389 vec_safe_push (all_translation_units, expr);
392 /* Unpack a TS_TARGET_OPTION tree from BP into EXPR. */
395 unpack_ts_target_option (struct bitpack_d *bp, tree expr)
398 struct cl_target_option *t = TREE_TARGET_OPTION (expr);
400 len = sizeof (struct cl_target_option);
401 for (i = 0; i < len; i++)
402 ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
403 if (bp_unpack_value (bp, 32) != 0x12345678)
404 fatal_error ("cl_target_option size mismatch in LTO reader and writer");
407 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR. */
410 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
413 struct cl_optimization *t = TREE_OPTIMIZATION (expr);
415 len = sizeof (struct cl_optimization);
416 for (i = 0; i < len; i++)
417 ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
418 if (bp_unpack_value (bp, 32) != 0x12345678)
419 fatal_error ("cl_optimization size mismatch in LTO reader and writer");
423 /* Unpack all the non-pointer fields in EXPR into a bit pack. */
426 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
430 code = TREE_CODE (expr);
432 /* Note that all these functions are highly sensitive to changes in
433 the types and sizes of each of the fields being packed. */
434 unpack_ts_base_value_fields (bp, expr);
436 if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
437 unpack_ts_int_cst_value_fields (bp, expr);
439 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
440 unpack_ts_real_cst_value_fields (bp, expr);
442 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
443 unpack_ts_fixed_cst_value_fields (bp, expr);
445 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
446 DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
448 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
449 unpack_ts_decl_common_value_fields (bp, expr);
451 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
452 unpack_ts_decl_wrtl_value_fields (bp, expr);
454 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
455 unpack_ts_decl_with_vis_value_fields (bp, expr);
457 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
458 unpack_ts_function_decl_value_fields (bp, expr);
460 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
461 unpack_ts_type_common_value_fields (bp, expr);
463 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
464 SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
466 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
467 unpack_ts_block_value_fields (data_in, bp, expr);
469 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
470 unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
472 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
473 unpack_ts_target_option (bp, expr);
475 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
476 unpack_ts_optimization (bp, expr);
478 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
480 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
482 vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
485 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
487 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
489 vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
494 /* Read all the language-independent bitfield values for EXPR from IB.
495 Return the partially unpacked bitpack so the caller can unpack any other
496 bitfield values that the writer may have written. */
499 streamer_read_tree_bitfields (struct lto_input_block *ib,
500 struct data_in *data_in, tree expr)
505 /* Read the bitpack of non-pointer values from IB. */
506 bp = streamer_read_bitpack (ib);
508 /* The first word in BP contains the code of the tree that we
509 are about to read. */
510 code = (enum tree_code) bp_unpack_value (&bp, 16);
511 lto_tag_check (lto_tree_code_to_tag (code),
512 lto_tree_code_to_tag (TREE_CODE (expr)));
514 /* Unpack all the value fields from BP. */
515 unpack_value_fields (data_in, &bp, expr);
521 /* Materialize a new tree from input block IB using descriptors in
522 DATA_IN. The code for the new tree should match TAG. Store in
523 *IX_P the index into the reader cache where the new tree is stored. */
526 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
531 #ifdef LTO_STREAMER_DEBUG
532 HOST_WIDEST_INT orig_address_in_writer;
537 #ifdef LTO_STREAMER_DEBUG
538 /* Read the word representing the memory address for the tree
539 as it was written by the writer. This is useful when
540 debugging differences between the writer and reader. */
541 orig_address_in_writer = streamer_read_hwi (ib);
542 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
545 code = lto_tag_to_tree_code (tag);
547 /* We should never see an SSA_NAME tree. Only the version numbers of
548 SSA names are ever written out. See input_ssa_names. */
549 gcc_assert (code != SSA_NAME);
551 /* Instantiate a new tree using the header data. */
552 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
553 result = streamer_read_string_cst (data_in, ib);
554 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
555 result = input_identifier (data_in, ib);
556 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
558 HOST_WIDE_INT len = streamer_read_hwi (ib);
559 result = make_tree_vec (len);
561 else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
563 HOST_WIDE_INT len = streamer_read_hwi (ib);
564 result = make_vector (len);
566 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
568 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
569 result = make_tree_binfo (len);
571 else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
573 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
574 result = make_int_cst (len);
575 TREE_INT_CST_NUNITS (result) = len;
577 else if (code == CALL_EXPR)
579 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
580 return build_vl_exp (CALL_EXPR, nargs + 3);
584 /* For all other nodes, materialize the tree with a raw
586 result = make_node (code);
589 #ifdef LTO_STREAMER_DEBUG
590 /* Store the original address of the tree as seen by the writer
591 in RESULT's aux field. This is useful when debugging streaming
592 problems. This way, a debugging session can be started on
593 both writer and reader with a breakpoint using this address
595 lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
602 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
603 block IB. DATA_IN contains tables and descriptors for the
608 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
609 struct data_in *data_in, tree expr)
611 if (TREE_CODE (expr) != IDENTIFIER_NODE)
612 TREE_TYPE (expr) = stream_read_tree (ib, data_in);
616 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
617 block IB. DATA_IN contains tables and descriptors for the
621 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
622 struct data_in *data_in, tree expr)
625 for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
626 VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
630 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
631 block IB. DATA_IN contains tables and descriptors for the
635 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
636 struct data_in *data_in, tree expr)
638 TREE_REALPART (expr) = stream_read_tree (ib, data_in);
639 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
643 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
644 from input block IB. DATA_IN contains tables and descriptors for the
648 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
649 struct data_in *data_in, tree expr)
651 DECL_NAME (expr) = stream_read_tree (ib, data_in);
652 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
656 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
657 input block IB. DATA_IN contains tables and descriptors for the
661 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
662 struct data_in *data_in, tree expr)
664 DECL_SIZE (expr) = stream_read_tree (ib, data_in);
665 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
666 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
668 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information
669 for early inlining so drop it on the floor instead of ICEing in
672 if ((TREE_CODE (expr) == VAR_DECL
673 || TREE_CODE (expr) == PARM_DECL)
674 && DECL_HAS_VALUE_EXPR_P (expr))
675 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
677 if (TREE_CODE (expr) == VAR_DECL)
679 tree dexpr = stream_read_tree (ib, data_in);
681 SET_DECL_DEBUG_EXPR (expr, dexpr);
686 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
687 EXPR from input block IB. DATA_IN contains tables and descriptors for the
691 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
692 struct data_in *data_in, tree expr)
694 if (TREE_CODE (expr) == TYPE_DECL)
695 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
696 DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
700 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
701 from input block IB. DATA_IN contains tables and descriptors for the
705 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
706 struct data_in *data_in, tree expr)
710 id = stream_read_tree (ib, data_in);
713 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
714 SET_DECL_ASSEMBLER_NAME (expr, id);
717 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
718 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
722 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
723 input block IB. DATA_IN contains tables and descriptors for the
727 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
728 struct data_in *data_in, tree expr)
730 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
731 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
732 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
733 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
734 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
738 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
739 from input block IB. DATA_IN contains tables and descriptors for the
743 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
744 struct data_in *data_in, tree expr)
746 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto,
747 maybe it should be handled here? */
748 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
749 DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
750 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
752 /* If the file contains a function with an EH personality set,
753 then it was compiled with -fexceptions. In that case, initialize
754 the backend EH machinery. */
755 if (DECL_FUNCTION_PERSONALITY (expr))
760 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
761 input block IB. DATA_IN contains tables and descriptors for the file
765 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
766 struct data_in *data_in, tree expr)
768 TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
769 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
770 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
771 TYPE_NAME (expr) = stream_read_tree (ib, data_in);
772 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be
773 reconstructed during fixup. */
774 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
776 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
777 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
778 /* TYPE_CANONICAL gets re-computed during type merging. */
779 TYPE_CANONICAL (expr) = NULL_TREE;
780 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
783 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
784 from input block IB. DATA_IN contains tables and descriptors for the
788 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
789 struct data_in *data_in,
792 if (TREE_CODE (expr) == ENUMERAL_TYPE)
793 TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
794 else if (TREE_CODE (expr) == ARRAY_TYPE)
795 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
796 else if (RECORD_OR_UNION_TYPE_P (expr))
797 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
798 else if (TREE_CODE (expr) == FUNCTION_TYPE
799 || TREE_CODE (expr) == METHOD_TYPE)
800 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
802 if (!POINTER_TYPE_P (expr))
803 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
804 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
805 if (RECORD_OR_UNION_TYPE_P (expr))
806 TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
810 /* Read all pointer fields in the TS_LIST structure of EXPR from input
811 block IB. DATA_IN contains tables and descriptors for the
815 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
816 struct data_in *data_in, tree expr)
818 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
819 TREE_VALUE (expr) = stream_read_tree (ib, data_in);
820 TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
824 /* Read all pointer fields in the TS_VEC structure of EXPR from input
825 block IB. DATA_IN contains tables and descriptors for the
829 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
830 struct data_in *data_in, tree expr)
834 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
836 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
837 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
841 /* Read all pointer fields in the TS_EXP structure of EXPR from input
842 block IB. DATA_IN contains tables and descriptors for the
847 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
848 struct data_in *data_in, tree expr)
852 for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
853 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
855 TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
859 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
860 block IB. DATA_IN contains tables and descriptors for the
864 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
865 struct data_in *data_in, tree expr)
867 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
869 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
871 /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
872 the limited cases we can handle - those that represent inlined
873 function scopes. For the rest them on the floor instead of ICEing in
875 BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
876 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
877 for early inlined BLOCKs so drop it on the floor instead of ICEing in
880 /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
883 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
884 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
885 stream the child relationship explicitly. */
886 if (BLOCK_SUPERCONTEXT (expr)
887 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
889 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
890 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
893 /* The global block is rooted at the TU decl. Hook it here to
894 avoid the need to stream in this block during WPA time. */
895 else if (BLOCK_SUPERCONTEXT (expr)
896 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
897 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
899 /* The function-level block is connected at the time we read in
900 function bodies for the same reason. */
904 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
905 block IB. DATA_IN contains tables and descriptors for the
909 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
910 struct data_in *data_in, tree expr)
915 /* Note that the number of slots in EXPR was read in
916 streamer_alloc_tree when instantiating EXPR. However, the
917 vector is empty so we cannot rely on vec::length to know how many
918 elements to read. So, this list is emitted as a 0-terminated
919 list on the writer side. */
922 t = stream_read_tree (ib, data_in);
924 BINFO_BASE_BINFOS (expr)->quick_push (t);
928 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
929 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
930 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
932 /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
933 unpacking the bitfield section. */
934 for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
936 tree a = stream_read_tree (ib, data_in);
937 (*BINFO_BASE_ACCESSES (expr))[i] = a;
939 /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
940 and BINFO_VPTR_INDEX; these are used by C++ FE only. */
944 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
945 input block IB. DATA_IN contains tables and descriptors for the
949 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
950 struct data_in *data_in, tree expr)
954 for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
957 e.index = stream_read_tree (ib, data_in);
958 e.value = stream_read_tree (ib, data_in);
959 (*CONSTRUCTOR_ELTS (expr))[i] = e;
964 /* Read all pointer fields in EXPR from input block IB. DATA_IN
965 contains tables and descriptors for the file being read. */
968 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
973 code = TREE_CODE (expr);
975 if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
976 lto_input_ts_common_tree_pointers (ib, data_in, expr);
978 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
979 lto_input_ts_vector_tree_pointers (ib, data_in, expr);
981 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
982 lto_input_ts_complex_tree_pointers (ib, data_in, expr);
984 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
985 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
987 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
988 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
990 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
991 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
993 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
994 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
996 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
997 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
999 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1000 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1002 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1003 lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1005 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1006 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1008 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1009 lto_input_ts_list_tree_pointers (ib, data_in, expr);
1011 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1012 lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1014 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1015 lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1017 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1018 lto_input_ts_block_tree_pointers (ib, data_in, expr);
1020 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1021 lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1023 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1024 lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1028 /* Read an index IX from input block IB and return the tree node at
1029 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */
1032 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1034 unsigned HOST_WIDE_INT ix;
1036 enum LTO_tags expected_tag;
1038 ix = streamer_read_uhwi (ib);
1039 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1041 result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1043 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1049 /* Read a code and class from input block IB and return the
1050 corresponding builtin. DATA_IN is as in stream_read_tree. */
1053 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1055 enum built_in_class fclass;
1056 enum built_in_function fcode;
1057 const char *asmname;
1060 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1061 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1063 fcode = (enum built_in_function) streamer_read_uhwi (ib);
1065 if (fclass == BUILT_IN_NORMAL)
1067 if (fcode >= END_BUILTINS)
1068 fatal_error ("machine independent builtin code out of range");
1069 result = builtin_decl_explicit (fcode);
1070 gcc_assert (result);
1072 else if (fclass == BUILT_IN_MD)
1074 result = targetm.builtin_decl (fcode, true);
1075 if (!result || result == error_mark_node)
1076 fatal_error ("target specific builtin not available");
1081 asmname = streamer_read_string (data_in, ib);
1083 set_builtin_user_assembler_name (result, asmname);
1085 streamer_tree_cache_append (data_in->reader_cache, result, 0);