1 /* Write the GIMPLE representation to a file stream.
3 Copyright 2009, 2010 Free Software Foundation, Inc.
4 Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
5 Re-implemented by Diego Novillo <dnovillo@google.com>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
34 #include "basic-block.h"
35 #include "tree-flow.h"
36 #include "tree-pass.h"
40 #include "diagnostic-core.h"
43 #include "lto-symtab.h"
44 #include "lto-streamer.h"
51 unsigned int slot_num;
55 /* Returns a hash code for P. */
58 hash_string_slot_node (const void *p)
60 const struct string_slot *ds = (const struct string_slot *) p;
61 return (hashval_t) htab_hash_string (ds->s);
65 /* Returns nonzero if P1 and P2 are equal. */
68 eq_string_slot_node (const void *p1, const void *p2)
70 const struct string_slot *ds1 = (const struct string_slot *) p1;
71 const struct string_slot *ds2 = (const struct string_slot *) p2;
73 if (ds1->len == ds2->len)
76 for (i = 0; i < ds1->len; i++)
77 if (ds1->s[i] != ds2->s[i])
86 /* Free the string slot pointed-to by P. */
89 string_slot_free (void *p)
91 struct string_slot *slot = (struct string_slot *) p;
92 free (CONST_CAST (void *, (const void *) slot->s));
97 /* Clear the line info stored in DATA_IN. */
100 clear_line_info (struct output_block *ob)
102 ob->current_file = NULL;
103 ob->current_line = 0;
108 /* Create the output block and return it. SECTION_TYPE is
109 LTO_section_function_body or LTO_static_initializer. */
111 struct output_block *
112 create_output_block (enum lto_section_type section_type)
114 struct output_block *ob = XCNEW (struct output_block);
116 ob->section_type = section_type;
117 ob->decl_state = lto_get_out_decl_state ();
118 ob->main_stream = XCNEW (struct lto_output_stream);
119 ob->string_stream = XCNEW (struct lto_output_stream);
120 ob->writer_cache = lto_streamer_cache_create ();
122 if (section_type == LTO_section_function_body)
123 ob->cfg_stream = XCNEW (struct lto_output_stream);
125 clear_line_info (ob);
127 ob->string_hash_table = htab_create (37, hash_string_slot_node,
128 eq_string_slot_node, string_slot_free);
134 /* Destroy the output block OB. */
137 destroy_output_block (struct output_block *ob)
139 enum lto_section_type section_type = ob->section_type;
141 htab_delete (ob->string_hash_table);
143 free (ob->main_stream);
144 free (ob->string_stream);
145 if (section_type == LTO_section_function_body)
146 free (ob->cfg_stream);
148 lto_streamer_cache_delete (ob->writer_cache);
154 /* Output STRING of LEN characters to the string
155 table in OB. The string might or might not include a trailing '\0'.
156 Then put the index onto the INDEX_STREAM. */
159 output_string_with_length (struct output_block *ob,
160 struct lto_output_stream *index_stream,
164 struct string_slot **slot;
165 struct string_slot s_slot;
166 char *string = (char *) xmalloc (len + 1);
167 memcpy (string, s, len);
174 slot = (struct string_slot **) htab_find_slot (ob->string_hash_table,
178 struct lto_output_stream *string_stream = ob->string_stream;
179 unsigned int start = string_stream->total_size;
180 struct string_slot *new_slot
181 = (struct string_slot *) xmalloc (sizeof (struct string_slot));
184 new_slot->s = string;
186 new_slot->slot_num = start;
188 lto_output_uleb128_stream (index_stream, start);
189 lto_output_uleb128_stream (string_stream, len);
190 for (i = 0; i < len; i++)
191 lto_output_1_stream (string_stream, string[i]);
195 struct string_slot *old_slot = (struct string_slot *)*slot;
196 lto_output_uleb128_stream (index_stream, old_slot->slot_num);
201 /* Output the '\0' terminated STRING to the string
202 table in OB. Then put the index onto the INDEX_STREAM. */
205 output_string (struct output_block *ob,
206 struct lto_output_stream *index_stream,
211 lto_output_uleb128_stream (index_stream, 0);
212 output_string_with_length (ob, index_stream, string, strlen (string) + 1);
215 lto_output_uleb128_stream (index_stream, 1);
219 /* Output the STRING constant to the string
220 table in OB. Then put the index onto the INDEX_STREAM. */
223 output_string_cst (struct output_block *ob,
224 struct lto_output_stream *index_stream,
229 lto_output_uleb128_stream (index_stream, 0);
230 output_string_with_length (ob, index_stream,
231 TREE_STRING_POINTER (string),
232 TREE_STRING_LENGTH (string));
235 lto_output_uleb128_stream (index_stream, 1);
239 /* Output the identifier ID to the string
240 table in OB. Then put the index onto the INDEX_STREAM. */
243 output_identifier (struct output_block *ob,
244 struct lto_output_stream *index_stream,
249 lto_output_uleb128_stream (index_stream, 0);
250 output_string_with_length (ob, index_stream,
251 IDENTIFIER_POINTER (id),
252 IDENTIFIER_LENGTH (id));
255 lto_output_uleb128_stream (index_stream, 1);
258 /* Write a zero to the output stream. */
261 output_zero (struct output_block *ob)
263 lto_output_1_stream (ob->main_stream, 0);
267 /* Output an unsigned LEB128 quantity to OB->main_stream. */
270 output_uleb128 (struct output_block *ob, unsigned HOST_WIDE_INT work)
272 lto_output_uleb128_stream (ob->main_stream, work);
276 /* Output a signed LEB128 quantity to OB->main_stream. */
279 output_sleb128 (struct output_block *ob, HOST_WIDE_INT work)
281 lto_output_sleb128_stream (ob->main_stream, work);
285 /* Output the start of a record with TAG to output block OB. */
288 output_record_start (struct output_block *ob, enum LTO_tags tag)
290 /* Make sure TAG fits inside an unsigned int. */
291 gcc_assert (tag == (enum LTO_tags) (unsigned) tag);
292 output_uleb128 (ob, tag);
296 /* Look up NODE in the type table and write the index for it to OB. */
299 output_type_ref (struct output_block *ob, tree node)
301 output_record_start (ob, LTO_type_ref);
302 lto_output_type_ref_index (ob->decl_state, ob->main_stream, node);
306 /* Pack all the non-pointer fields of the TS_BASE structure of
307 expression EXPR into bitpack BP. */
310 pack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
312 bp_pack_value (bp, TREE_CODE (expr), 16);
315 bp_pack_value (bp, TREE_SIDE_EFFECTS (expr), 1);
316 bp_pack_value (bp, TREE_CONSTANT (expr), 1);
317 bp_pack_value (bp, TREE_READONLY (expr), 1);
319 /* TREE_PUBLIC is used on types to indicate that the type
320 has a TYPE_CACHED_VALUES vector. This is not streamed out,
321 so we skip it here. */
322 bp_pack_value (bp, TREE_PUBLIC (expr), 1);
325 bp_pack_value (bp, 0, 4);
326 bp_pack_value (bp, TREE_ADDRESSABLE (expr), 1);
327 bp_pack_value (bp, TREE_THIS_VOLATILE (expr), 1);
329 bp_pack_value (bp, DECL_UNSIGNED (expr), 1);
330 else if (TYPE_P (expr))
331 bp_pack_value (bp, TYPE_UNSIGNED (expr), 1);
333 bp_pack_value (bp, 0, 1);
334 /* We write debug info two times, do not confuse the second one. */
335 bp_pack_value (bp, TYPE_P (expr) ? 0 : TREE_ASM_WRITTEN (expr), 1);
336 bp_pack_value (bp, TREE_NO_WARNING (expr), 1);
337 bp_pack_value (bp, TREE_USED (expr), 1);
338 bp_pack_value (bp, TREE_NOTHROW (expr), 1);
339 bp_pack_value (bp, TREE_STATIC (expr), 1);
340 bp_pack_value (bp, TREE_PRIVATE (expr), 1);
341 bp_pack_value (bp, TREE_PROTECTED (expr), 1);
342 bp_pack_value (bp, TREE_DEPRECATED (expr), 1);
344 bp_pack_value (bp, TYPE_SATURATING (expr), 1);
345 else if (TREE_CODE (expr) == SSA_NAME)
346 bp_pack_value (bp, SSA_NAME_IS_DEFAULT_DEF (expr), 1);
348 bp_pack_value (bp, 0, 1);
352 /* Pack all the non-pointer fields of the TS_REAL_CST structure of
353 expression EXPR into bitpack BP. */
356 pack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
361 r = TREE_REAL_CST (expr);
362 bp_pack_value (bp, r.cl, 2);
363 bp_pack_value (bp, r.decimal, 1);
364 bp_pack_value (bp, r.sign, 1);
365 bp_pack_value (bp, r.signalling, 1);
366 bp_pack_value (bp, r.canonical, 1);
367 bp_pack_value (bp, r.uexp, EXP_BITS);
368 for (i = 0; i < SIGSZ; i++)
369 bp_pack_value (bp, r.sig[i], HOST_BITS_PER_LONG);
373 /* Pack all the non-pointer fields of the TS_FIXED_CST structure of
374 expression EXPR into bitpack BP. */
377 pack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
379 struct fixed_value fv = TREE_FIXED_CST (expr);
380 bp_pack_value (bp, fv.data.low, HOST_BITS_PER_WIDE_INT);
381 bp_pack_value (bp, fv.data.high, HOST_BITS_PER_WIDE_INT);
382 bp_pack_value (bp, fv.mode, HOST_BITS_PER_INT);
386 /* Pack all the non-pointer fields of the TS_DECL_COMMON structure
387 of expression EXPR into bitpack BP. */
390 pack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
392 bp_pack_value (bp, DECL_MODE (expr), 8);
393 bp_pack_value (bp, DECL_NONLOCAL (expr), 1);
394 bp_pack_value (bp, DECL_VIRTUAL_P (expr), 1);
395 bp_pack_value (bp, DECL_IGNORED_P (expr), 1);
396 bp_pack_value (bp, DECL_ABSTRACT (expr), 1);
397 bp_pack_value (bp, DECL_ARTIFICIAL (expr), 1);
398 bp_pack_value (bp, DECL_USER_ALIGN (expr), 1);
399 bp_pack_value (bp, DECL_PRESERVE_P (expr), 1);
400 bp_pack_value (bp, DECL_DEBUG_EXPR_IS_FROM (expr), 1);
401 bp_pack_value (bp, DECL_EXTERNAL (expr), 1);
402 bp_pack_value (bp, DECL_GIMPLE_REG_P (expr), 1);
403 bp_pack_value (bp, DECL_ALIGN (expr), HOST_BITS_PER_INT);
405 if (TREE_CODE (expr) == LABEL_DECL)
407 /* Note that we do not write LABEL_DECL_UID. The reader will
408 always assume an initial value of -1 so that the
409 label_to_block_map is recreated by gimple_set_bb. */
410 bp_pack_value (bp, DECL_ERROR_ISSUED (expr), 1);
411 bp_pack_value (bp, EH_LANDING_PAD_NR (expr), HOST_BITS_PER_INT);
414 if (TREE_CODE (expr) == FIELD_DECL)
416 bp_pack_value (bp, DECL_PACKED (expr), 1);
417 bp_pack_value (bp, DECL_NONADDRESSABLE_P (expr), 1);
418 bp_pack_value (bp, DECL_OFFSET_ALIGN (expr), 8);
421 if (TREE_CODE (expr) == RESULT_DECL
422 || TREE_CODE (expr) == PARM_DECL
423 || TREE_CODE (expr) == VAR_DECL)
425 bp_pack_value (bp, DECL_BY_REFERENCE (expr), 1);
426 if (TREE_CODE (expr) == VAR_DECL
427 || TREE_CODE (expr) == PARM_DECL)
428 bp_pack_value (bp, DECL_HAS_VALUE_EXPR_P (expr), 1);
429 bp_pack_value (bp, DECL_RESTRICTED_P (expr), 1);
434 /* Pack all the non-pointer fields of the TS_DECL_WRTL structure
435 of expression EXPR into bitpack BP. */
438 pack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
440 bp_pack_value (bp, DECL_REGISTER (expr), 1);
444 /* Pack all the non-pointer fields of the TS_DECL_WITH_VIS structure
445 of expression EXPR into bitpack BP. */
448 pack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
450 bp_pack_value (bp, DECL_DEFER_OUTPUT (expr), 1);
451 bp_pack_value (bp, DECL_COMMON (expr), 1);
452 bp_pack_value (bp, DECL_DLLIMPORT_P (expr), 1);
453 bp_pack_value (bp, DECL_WEAK (expr), 1);
454 bp_pack_value (bp, DECL_SEEN_IN_BIND_EXPR_P (expr), 1);
455 bp_pack_value (bp, DECL_COMDAT (expr), 1);
456 bp_pack_value (bp, DECL_VISIBILITY (expr), 2);
457 bp_pack_value (bp, DECL_VISIBILITY_SPECIFIED (expr), 1);
459 if (TREE_CODE (expr) == VAR_DECL)
461 bp_pack_value (bp, DECL_HARD_REGISTER (expr), 1);
462 bp_pack_value (bp, DECL_IN_TEXT_SECTION (expr), 1);
463 bp_pack_value (bp, DECL_IN_CONSTANT_POOL (expr), 1);
464 bp_pack_value (bp, DECL_TLS_MODEL (expr), 3);
467 if (VAR_OR_FUNCTION_DECL_P (expr))
468 bp_pack_value (bp, DECL_INIT_PRIORITY (expr), HOST_BITS_PER_SHORT);
472 /* Pack all the non-pointer fields of the TS_FUNCTION_DECL structure
473 of expression EXPR into bitpack BP. */
476 pack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
478 /* For normal/md builtins we only write the class and code, so they
479 should never be handled here. */
480 gcc_assert (!lto_stream_as_builtin_p (expr));
482 bp_pack_value (bp, DECL_FUNCTION_CODE (expr), 11);
483 bp_pack_value (bp, DECL_BUILT_IN_CLASS (expr), 2);
484 bp_pack_value (bp, DECL_STATIC_CONSTRUCTOR (expr), 1);
485 bp_pack_value (bp, DECL_STATIC_DESTRUCTOR (expr), 1);
486 bp_pack_value (bp, DECL_UNINLINABLE (expr), 1);
487 bp_pack_value (bp, DECL_POSSIBLY_INLINED (expr), 1);
488 bp_pack_value (bp, DECL_IS_NOVOPS (expr), 1);
489 bp_pack_value (bp, DECL_IS_RETURNS_TWICE (expr), 1);
490 bp_pack_value (bp, DECL_IS_MALLOC (expr), 1);
491 bp_pack_value (bp, DECL_IS_OPERATOR_NEW (expr), 1);
492 bp_pack_value (bp, DECL_DECLARED_INLINE_P (expr), 1);
493 bp_pack_value (bp, DECL_STATIC_CHAIN (expr), 1);
494 bp_pack_value (bp, DECL_NO_INLINE_WARNING_P (expr), 1);
495 bp_pack_value (bp, DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr), 1);
496 bp_pack_value (bp, DECL_NO_LIMIT_STACK (expr), 1);
497 bp_pack_value (bp, DECL_DISREGARD_INLINE_LIMITS (expr), 1);
498 bp_pack_value (bp, DECL_PURE_P (expr), 1);
499 bp_pack_value (bp, DECL_LOOPING_CONST_OR_PURE_P (expr), 1);
503 /* Pack all the non-pointer fields of the TS_TYPE structure
504 of expression EXPR into bitpack BP. */
507 pack_ts_type_value_fields (struct bitpack_d *bp, tree expr)
509 bp_pack_value (bp, TYPE_PRECISION (expr), 10);
510 bp_pack_value (bp, TYPE_MODE (expr), 8);
511 bp_pack_value (bp, TYPE_STRING_FLAG (expr), 1);
512 bp_pack_value (bp, TYPE_NO_FORCE_BLK (expr), 1);
513 bp_pack_value (bp, TYPE_NEEDS_CONSTRUCTING (expr), 1);
514 if (RECORD_OR_UNION_TYPE_P (expr))
515 bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1);
516 bp_pack_value (bp, TYPE_PACKED (expr), 1);
517 bp_pack_value (bp, TYPE_RESTRICT (expr), 1);
518 bp_pack_value (bp, TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr), 2);
519 bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1);
520 bp_pack_value (bp, TYPE_READONLY (expr), 1);
521 bp_pack_value (bp, TYPE_ALIGN (expr), HOST_BITS_PER_INT);
522 bp_pack_value (bp, TYPE_ALIAS_SET (expr) == 0 ? 0 : -1, HOST_BITS_PER_INT);
526 /* Pack all the non-pointer fields of the TS_BLOCK structure
527 of expression EXPR into bitpack BP. */
530 pack_ts_block_value_fields (struct bitpack_d *bp, tree expr)
532 bp_pack_value (bp, BLOCK_ABSTRACT (expr), 1);
533 bp_pack_value (bp, BLOCK_NUMBER (expr), 31);
537 /* Pack all the non-pointer fields in EXPR into a bit pack. */
540 pack_value_fields (struct bitpack_d *bp, tree expr)
544 code = TREE_CODE (expr);
546 /* Note that all these functions are highly sensitive to changes in
547 the types and sizes of each of the fields being packed. */
548 pack_ts_base_value_fields (bp, expr);
550 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
551 pack_ts_real_cst_value_fields (bp, expr);
553 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
554 pack_ts_fixed_cst_value_fields (bp, expr);
556 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
557 pack_ts_decl_common_value_fields (bp, expr);
559 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
560 pack_ts_decl_wrtl_value_fields (bp, expr);
562 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
563 pack_ts_decl_with_vis_value_fields (bp, expr);
565 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
566 pack_ts_function_decl_value_fields (bp, expr);
568 if (CODE_CONTAINS_STRUCT (code, TS_TYPE))
569 pack_ts_type_value_fields (bp, expr);
571 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
572 pack_ts_block_value_fields (bp, expr);
574 if (CODE_CONTAINS_STRUCT (code, TS_SSA_NAME))
576 /* We only stream the version number of SSA names. */
580 if (CODE_CONTAINS_STRUCT (code, TS_STATEMENT_LIST))
582 /* This is only used by GENERIC. */
586 if (CODE_CONTAINS_STRUCT (code, TS_OMP_CLAUSE))
588 /* This is only used by High GIMPLE. */
594 /* Emit location LOC to output block OB. */
597 lto_output_location (struct output_block *ob, location_t loc)
599 expanded_location xloc;
601 if (loc == UNKNOWN_LOCATION)
603 output_string (ob, ob->main_stream, NULL);
607 xloc = expand_location (loc);
609 output_string (ob, ob->main_stream, xloc.file);
610 output_sleb128 (ob, xloc.line);
611 output_sleb128 (ob, xloc.column);
612 output_sleb128 (ob, xloc.sysp);
614 ob->current_file = xloc.file;
615 ob->current_line = xloc.line;
616 ob->current_col = xloc.column;
620 /* Return true if tree node T is written to various tables. For these
621 nodes, we sometimes want to write their phyiscal representation
622 (via lto_output_tree), and sometimes we need to emit an index
623 reference into a table (via lto_output_tree_ref). */
626 tree_is_indexable (tree t)
628 if (TREE_CODE (t) == PARM_DECL)
630 else if (TREE_CODE (t) == VAR_DECL && decl_function_context (t)
634 return (TYPE_P (t) || DECL_P (t) || TREE_CODE (t) == SSA_NAME);
638 /* If EXPR is an indexable tree node, output a reference to it to
639 output block OB. Otherwise, output the physical representation of
643 lto_output_tree_ref (struct output_block *ob, tree expr)
647 if (expr == NULL_TREE)
653 if (!tree_is_indexable (expr))
655 /* Even though we are emitting the physical representation of
656 EXPR, its leaves must be emitted as references. */
657 lto_output_tree (ob, expr, true);
663 output_type_ref (ob, expr);
667 code = TREE_CODE (expr);
671 output_record_start (ob, LTO_ssa_name_ref);
672 output_uleb128 (ob, SSA_NAME_VERSION (expr));
676 output_record_start (ob, LTO_field_decl_ref);
677 lto_output_field_decl_index (ob->decl_state, ob->main_stream, expr);
681 output_record_start (ob, LTO_function_decl_ref);
682 lto_output_fn_decl_index (ob->decl_state, ob->main_stream, expr);
686 case DEBUG_EXPR_DECL:
687 gcc_assert (decl_function_context (expr) == NULL
688 || TREE_STATIC (expr));
689 output_record_start (ob, LTO_global_decl_ref);
690 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
694 output_record_start (ob, LTO_const_decl_ref);
695 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
699 gcc_assert (decl_function_context (expr) == NULL);
700 output_record_start (ob, LTO_imported_decl_ref);
701 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
705 output_record_start (ob, LTO_type_decl_ref);
706 lto_output_type_decl_index (ob->decl_state, ob->main_stream, expr);
710 output_record_start (ob, LTO_namespace_decl_ref);
711 lto_output_namespace_decl_index (ob->decl_state, ob->main_stream, expr);
715 output_record_start (ob, LTO_label_decl_ref);
716 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
720 output_record_start (ob, LTO_result_decl_ref);
721 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
725 /* No other node is indexable, so it should have been handled
726 by lto_output_tree. */
732 /* If REF_P is true, emit a reference to EXPR in output block OB,
733 otherwise emit the physical representation of EXPR in OB. */
736 lto_output_tree_or_ref (struct output_block *ob, tree expr, bool ref_p)
739 lto_output_tree_ref (ob, expr);
741 lto_output_tree (ob, expr, false);
745 /* Emit the chain of tree nodes starting at T. OB is the output block
746 to write to. REF_P is true if chain elements should be emitted
750 lto_output_chain (struct output_block *ob, tree t, bool ref_p)
754 count = list_length (t);
755 output_sleb128 (ob, count);
756 for (i = 0; i < count; i++)
760 /* Clear TREE_CHAIN to avoid blindly recursing into the rest
762 saved_chain = TREE_CHAIN (t);
763 TREE_CHAIN (t) = NULL_TREE;
765 lto_output_tree_or_ref (ob, t, ref_p);
767 TREE_CHAIN (t) = saved_chain;
773 /* Write all pointer fields in the TS_COMMON structure of EXPR to output
774 block OB. If REF_P is true, write a reference to EXPR's pointer
778 lto_output_ts_common_tree_pointers (struct output_block *ob, tree expr,
781 lto_output_tree_or_ref (ob, TREE_TYPE (expr), ref_p);
785 /* Write all pointer fields in the TS_VECTOR structure of EXPR to output
786 block OB. If REF_P is true, write a reference to EXPR's pointer
790 lto_output_ts_vector_tree_pointers (struct output_block *ob, tree expr,
793 lto_output_chain (ob, TREE_VECTOR_CST_ELTS (expr), ref_p);
797 /* Write all pointer fields in the TS_COMPLEX structure of EXPR to output
798 block OB. If REF_P is true, write a reference to EXPR's pointer
802 lto_output_ts_complex_tree_pointers (struct output_block *ob, tree expr,
805 lto_output_tree_or_ref (ob, TREE_REALPART (expr), ref_p);
806 lto_output_tree_or_ref (ob, TREE_IMAGPART (expr), ref_p);
810 /* Write all pointer fields in the TS_DECL_MINIMAL structure of EXPR
811 to output block OB. If REF_P is true, write a reference to EXPR's
815 lto_output_ts_decl_minimal_tree_pointers (struct output_block *ob, tree expr,
818 lto_output_tree_or_ref (ob, DECL_NAME (expr), ref_p);
819 lto_output_tree_or_ref (ob, DECL_CONTEXT (expr), ref_p);
820 lto_output_location (ob, DECL_SOURCE_LOCATION (expr));
824 /* Write all pointer fields in the TS_DECL_COMMON structure of EXPR to
825 output block OB. If REF_P is true, write a reference to EXPR's
829 lto_output_ts_decl_common_tree_pointers (struct output_block *ob, tree expr,
832 lto_output_tree_or_ref (ob, DECL_SIZE (expr), ref_p);
833 lto_output_tree_or_ref (ob, DECL_SIZE_UNIT (expr), ref_p);
835 if (TREE_CODE (expr) != FUNCTION_DECL)
837 tree initial = DECL_INITIAL (expr);
838 if (TREE_CODE (expr) == VAR_DECL
839 && (TREE_STATIC (expr) || DECL_EXTERNAL (expr))
842 lto_varpool_encoder_t varpool_encoder = ob->decl_state->varpool_node_encoder;
843 struct varpool_node *vnode = varpool_get_node (expr);
845 initial = error_mark_node;
846 else if (!lto_varpool_encoder_encode_initializer_p (varpool_encoder,
851 lto_output_tree_or_ref (ob, initial, ref_p);
854 lto_output_tree_or_ref (ob, DECL_ATTRIBUTES (expr), ref_p);
855 lto_output_tree_or_ref (ob, DECL_ABSTRACT_ORIGIN (expr), ref_p);
857 if (TREE_CODE (expr) == PARM_DECL)
858 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
860 if ((TREE_CODE (expr) == VAR_DECL
861 || TREE_CODE (expr) == PARM_DECL)
862 && DECL_HAS_VALUE_EXPR_P (expr))
863 lto_output_tree_or_ref (ob, DECL_VALUE_EXPR (expr), ref_p);
867 /* Write all pointer fields in the TS_DECL_NON_COMMON structure of
868 EXPR to output block OB. If REF_P is true, write a reference to EXPR's
872 lto_output_ts_decl_non_common_tree_pointers (struct output_block *ob,
873 tree expr, bool ref_p)
875 if (TREE_CODE (expr) == FUNCTION_DECL)
877 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
878 At this point, it should not exist. Either because it was
879 converted to gimple or because DECL didn't have a GENERIC
880 representation in this TU. */
881 gcc_assert (DECL_SAVED_TREE (expr) == NULL_TREE);
882 lto_output_tree_or_ref (ob, DECL_ARGUMENTS (expr), ref_p);
883 lto_output_tree_or_ref (ob, DECL_RESULT (expr), ref_p);
885 lto_output_tree_or_ref (ob, DECL_VINDEX (expr), ref_p);
889 /* Write all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
890 to output block OB. If REF_P is true, write a reference to EXPR's
894 lto_output_ts_decl_with_vis_tree_pointers (struct output_block *ob, tree expr,
897 /* Make sure we don't inadvertently set the assembler name. */
898 if (DECL_ASSEMBLER_NAME_SET_P (expr))
899 lto_output_tree_or_ref (ob, DECL_ASSEMBLER_NAME (expr), ref_p);
903 lto_output_tree_or_ref (ob, DECL_SECTION_NAME (expr), ref_p);
904 lto_output_tree_or_ref (ob, DECL_COMDAT_GROUP (expr), ref_p);
908 /* Write all pointer fields in the TS_FIELD_DECL structure of EXPR to
909 output block OB. If REF_P is true, write a reference to EXPR's
913 lto_output_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
916 lto_output_tree_or_ref (ob, DECL_FIELD_OFFSET (expr), ref_p);
917 lto_output_tree_or_ref (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
918 lto_output_tree_or_ref (ob, DECL_QUALIFIER (expr), ref_p);
919 lto_output_tree_or_ref (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
920 lto_output_tree_or_ref (ob, DECL_FCONTEXT (expr), ref_p);
921 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
925 /* Write all pointer fields in the TS_FUNCTION_DECL structure of EXPR
926 to output block OB. If REF_P is true, write a reference to EXPR's
930 lto_output_ts_function_decl_tree_pointers (struct output_block *ob, tree expr,
933 /* DECL_STRUCT_FUNCTION is handled by lto_output_function. FIXME lto,
934 maybe it should be handled here? */
935 lto_output_tree_or_ref (ob, DECL_FUNCTION_PERSONALITY (expr), ref_p);
936 lto_output_tree_or_ref (ob, DECL_FUNCTION_SPECIFIC_TARGET (expr), ref_p);
937 lto_output_tree_or_ref (ob, DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr),
942 /* Write all pointer fields in the TS_TYPE structure of EXPR to output
943 block OB. If REF_P is true, write a reference to EXPR's pointer
947 lto_output_ts_type_tree_pointers (struct output_block *ob, tree expr,
950 if (TREE_CODE (expr) == ENUMERAL_TYPE)
951 lto_output_tree_or_ref (ob, TYPE_VALUES (expr), ref_p);
952 else if (TREE_CODE (expr) == ARRAY_TYPE)
953 lto_output_tree_or_ref (ob, TYPE_DOMAIN (expr), ref_p);
954 else if (RECORD_OR_UNION_TYPE_P (expr))
955 lto_output_tree_or_ref (ob, TYPE_FIELDS (expr), ref_p);
956 else if (TREE_CODE (expr) == FUNCTION_TYPE
957 || TREE_CODE (expr) == METHOD_TYPE)
958 lto_output_tree_or_ref (ob, TYPE_ARG_TYPES (expr), ref_p);
959 else if (TREE_CODE (expr) == VECTOR_TYPE)
960 lto_output_tree_or_ref (ob, TYPE_DEBUG_REPRESENTATION_TYPE (expr), ref_p);
962 lto_output_tree_or_ref (ob, TYPE_SIZE (expr), ref_p);
963 lto_output_tree_or_ref (ob, TYPE_SIZE_UNIT (expr), ref_p);
964 lto_output_tree_or_ref (ob, TYPE_ATTRIBUTES (expr), ref_p);
965 lto_output_tree_or_ref (ob, TYPE_NAME (expr), ref_p);
966 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO nor
967 TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. */
968 if (!POINTER_TYPE_P (expr))
969 lto_output_tree_or_ref (ob, TYPE_MINVAL (expr), ref_p);
970 lto_output_tree_or_ref (ob, TYPE_MAXVAL (expr), ref_p);
971 lto_output_tree_or_ref (ob, TYPE_MAIN_VARIANT (expr), ref_p);
972 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
974 if (RECORD_OR_UNION_TYPE_P (expr))
975 lto_output_tree_or_ref (ob, TYPE_BINFO (expr), ref_p);
976 lto_output_tree_or_ref (ob, TYPE_CONTEXT (expr), ref_p);
977 /* TYPE_CANONICAL is re-computed during type merging, so no need
978 to stream it here. */
979 lto_output_tree_or_ref (ob, TYPE_STUB_DECL (expr), ref_p);
983 /* Write all pointer fields in the TS_LIST structure of EXPR to output
984 block OB. If REF_P is true, write a reference to EXPR's pointer
988 lto_output_ts_list_tree_pointers (struct output_block *ob, tree expr,
991 lto_output_tree_or_ref (ob, TREE_PURPOSE (expr), ref_p);
992 lto_output_tree_or_ref (ob, TREE_VALUE (expr), ref_p);
993 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
997 /* Write all pointer fields in the TS_VEC structure of EXPR to output
998 block OB. If REF_P is true, write a reference to EXPR's pointer
1002 lto_output_ts_vec_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1006 /* Note that the number of slots for EXPR has already been emitted
1007 in EXPR's header (see lto_output_tree_header). */
1008 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
1009 lto_output_tree_or_ref (ob, TREE_VEC_ELT (expr, i), ref_p);
1013 /* Write all pointer fields in the TS_EXP structure of EXPR to output
1014 block OB. If REF_P is true, write a reference to EXPR's pointer
1018 lto_output_ts_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1022 output_sleb128 (ob, TREE_OPERAND_LENGTH (expr));
1023 for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
1024 lto_output_tree_or_ref (ob, TREE_OPERAND (expr, i), ref_p);
1025 lto_output_location (ob, EXPR_LOCATION (expr));
1026 lto_output_tree_or_ref (ob, TREE_BLOCK (expr), ref_p);
1030 /* Write all pointer fields in the TS_BLOCK structure of EXPR to output
1031 block OB. If REF_P is true, write a reference to EXPR's pointer
1035 lto_output_ts_block_tree_pointers (struct output_block *ob, tree expr,
1041 lto_output_location (ob, BLOCK_SOURCE_LOCATION (expr));
1042 lto_output_chain (ob, BLOCK_VARS (expr), ref_p);
1044 output_uleb128 (ob, VEC_length (tree, BLOCK_NONLOCALIZED_VARS (expr)));
1045 FOR_EACH_VEC_ELT (tree, BLOCK_NONLOCALIZED_VARS (expr), i, t)
1046 lto_output_tree_or_ref (ob, t, ref_p);
1048 lto_output_tree_or_ref (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
1049 lto_output_tree_or_ref (ob, BLOCK_ABSTRACT_ORIGIN (expr), ref_p);
1050 lto_output_tree_or_ref (ob, BLOCK_FRAGMENT_ORIGIN (expr), ref_p);
1051 lto_output_tree_or_ref (ob, BLOCK_FRAGMENT_CHAIN (expr), ref_p);
1052 lto_output_chain (ob, BLOCK_SUBBLOCKS (expr), ref_p);
1056 /* Write all pointer fields in the TS_BINFO structure of EXPR to output
1057 block OB. If REF_P is true, write a reference to EXPR's pointer
1061 lto_output_ts_binfo_tree_pointers (struct output_block *ob, tree expr,
1067 /* Note that the number of BINFO slots has already been emitted in
1068 EXPR's header (see lto_output_tree_header) because this length
1069 is needed to build the empty BINFO node on the reader side. */
1070 FOR_EACH_VEC_ELT (tree, BINFO_BASE_BINFOS (expr), i, t)
1071 lto_output_tree_or_ref (ob, t, ref_p);
1074 lto_output_tree_or_ref (ob, BINFO_OFFSET (expr), ref_p);
1075 lto_output_tree_or_ref (ob, BINFO_VTABLE (expr), ref_p);
1076 lto_output_tree_or_ref (ob, BINFO_VIRTUALS (expr), ref_p);
1077 lto_output_tree_or_ref (ob, BINFO_VPTR_FIELD (expr), ref_p);
1079 output_uleb128 (ob, VEC_length (tree, BINFO_BASE_ACCESSES (expr)));
1080 FOR_EACH_VEC_ELT (tree, BINFO_BASE_ACCESSES (expr), i, t)
1081 lto_output_tree_or_ref (ob, t, ref_p);
1083 lto_output_tree_or_ref (ob, BINFO_INHERITANCE_CHAIN (expr), ref_p);
1084 lto_output_tree_or_ref (ob, BINFO_SUBVTT_INDEX (expr), ref_p);
1085 lto_output_tree_or_ref (ob, BINFO_VPTR_INDEX (expr), ref_p);
1089 /* Write all pointer fields in the TS_CONSTRUCTOR structure of EXPR to
1090 output block OB. If REF_P is true, write a reference to EXPR's
1094 lto_output_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
1100 output_uleb128 (ob, CONSTRUCTOR_NELTS (expr));
1101 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (expr), i, index, value)
1103 lto_output_tree_or_ref (ob, index, ref_p);
1104 lto_output_tree_or_ref (ob, value, ref_p);
1109 /* Helper for lto_output_tree. Write all pointer fields in EXPR to output
1110 block OB. If REF_P is true, the leaves of EXPR are emitted as
1114 lto_output_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1116 enum tree_code code;
1118 code = TREE_CODE (expr);
1120 if (CODE_CONTAINS_STRUCT (code, TS_COMMON))
1121 lto_output_ts_common_tree_pointers (ob, expr, ref_p);
1123 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1124 lto_output_ts_vector_tree_pointers (ob, expr, ref_p);
1126 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1127 lto_output_ts_complex_tree_pointers (ob, expr, ref_p);
1129 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1130 lto_output_ts_decl_minimal_tree_pointers (ob, expr, ref_p);
1132 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1133 lto_output_ts_decl_common_tree_pointers (ob, expr, ref_p);
1135 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1136 lto_output_ts_decl_non_common_tree_pointers (ob, expr, ref_p);
1138 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1139 lto_output_ts_decl_with_vis_tree_pointers (ob, expr, ref_p);
1141 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1142 lto_output_ts_field_decl_tree_pointers (ob, expr, ref_p);
1144 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1145 lto_output_ts_function_decl_tree_pointers (ob, expr, ref_p);
1147 if (CODE_CONTAINS_STRUCT (code, TS_TYPE))
1148 lto_output_ts_type_tree_pointers (ob, expr, ref_p);
1150 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1151 lto_output_ts_list_tree_pointers (ob, expr, ref_p);
1153 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1154 lto_output_ts_vec_tree_pointers (ob, expr, ref_p);
1156 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1157 lto_output_ts_exp_tree_pointers (ob, expr, ref_p);
1159 if (CODE_CONTAINS_STRUCT (code, TS_SSA_NAME))
1161 /* We only stream the version number of SSA names. */
1165 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1166 lto_output_ts_block_tree_pointers (ob, expr, ref_p);
1168 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1169 lto_output_ts_binfo_tree_pointers (ob, expr, ref_p);
1171 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1172 lto_output_ts_constructor_tree_pointers (ob, expr, ref_p);
1174 if (CODE_CONTAINS_STRUCT (code, TS_STATEMENT_LIST))
1176 /* This should only appear in GENERIC. */
1180 if (CODE_CONTAINS_STRUCT (code, TS_OMP_CLAUSE))
1182 /* This should only appear in High GIMPLE. */
1186 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
1187 sorry ("gimple bytecode streams do not support the optimization attribute");
1189 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
1190 sorry ("gimple bytecode streams do not support the target attribute");
1194 /* Emit header information for tree EXPR to output block OB. The header
1195 contains everything needed to instantiate an empty skeleton for
1196 EXPR on the reading side. IX is the index into the streamer cache
1197 where EXPR is stored. REF_P is as in lto_output_tree. */
1200 lto_output_tree_header (struct output_block *ob, tree expr, int ix)
1203 enum tree_code code;
1205 /* We should not see any non-GIMPLE tree nodes here. */
1206 code = TREE_CODE (expr);
1207 if (!lto_is_streamable (expr))
1208 internal_error ("tree code %qs is not supported in gimple streams",
1209 tree_code_name[code]);
1211 /* The header of a tree node consists of its tag, the size of
1212 the node, and any other information needed to instantiate
1213 EXPR on the reading side (such as the number of slots in
1214 variable sized nodes). */
1215 tag = lto_tree_code_to_tag (code);
1216 output_record_start (ob, tag);
1217 output_sleb128 (ob, ix);
1219 /* The following will cause bootstrap miscomparisons. Enable with care. */
1220 #ifdef LTO_STREAMER_DEBUG
1221 /* This is used mainly for debugging purposes. When the reader
1222 and the writer do not agree on a streamed node, the pointer
1223 value for EXPR can be used to track down the differences in
1225 gcc_assert ((HOST_WIDEST_INT) (intptr_t) expr == (intptr_t) expr);
1226 output_sleb128 (ob, (HOST_WIDEST_INT) (intptr_t) expr);
1229 /* The text in strings and identifiers are completely emitted in
1231 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
1232 output_string_cst (ob, ob->main_stream, expr);
1233 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
1234 output_identifier (ob, ob->main_stream, expr);
1235 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1236 output_sleb128 (ob, TREE_VEC_LENGTH (expr));
1237 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1238 output_uleb128 (ob, BINFO_N_BASE_BINFOS (expr));
1242 /* Write the code and class of builtin EXPR to output block OB. IX is
1243 the index into the streamer cache where EXPR is stored.*/
1246 lto_output_builtin_tree (struct output_block *ob, tree expr, int ix)
1248 gcc_assert (lto_stream_as_builtin_p (expr));
1250 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD
1251 && !targetm.builtin_decl)
1252 sorry ("gimple bytecode streams do not support machine specific builtin "
1253 "functions on this target");
1255 output_record_start (ob, LTO_builtin_decl);
1256 output_uleb128 (ob, DECL_BUILT_IN_CLASS (expr));
1257 output_uleb128 (ob, DECL_FUNCTION_CODE (expr));
1258 output_sleb128 (ob, ix);
1260 if (DECL_ASSEMBLER_NAME_SET_P (expr))
1262 /* When the assembler name of a builtin gets a user name,
1263 the new name is always prefixed with '*' by
1264 set_builtin_user_assembler_name. So, to prevent the
1265 reader side from adding a second '*', we omit it here. */
1266 const char *str = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (expr));
1267 if (strlen (str) > 1 && str[0] == '*')
1268 output_string (ob, ob->main_stream, &str[1]);
1270 output_string (ob, ob->main_stream, NULL);
1273 output_string (ob, ob->main_stream, NULL);
1277 /* Write a physical representation of tree node EXPR to output block
1278 OB. If REF_P is true, the leaves of EXPR are emitted as references
1279 via lto_output_tree_ref. IX is the index into the streamer cache
1280 where EXPR is stored. */
1283 lto_write_tree (struct output_block *ob, tree expr, bool ref_p, int ix)
1285 struct bitpack_d bp;
1287 /* Write the header, containing everything needed to materialize
1288 EXPR on the reading side. */
1289 lto_output_tree_header (ob, expr, ix);
1291 /* Pack all the non-pointer fields in EXPR into a bitpack and write
1292 the resulting bitpack. */
1293 bp = bitpack_create (ob->main_stream);
1294 pack_value_fields (&bp, expr);
1295 lto_output_bitpack (&bp);
1297 /* Write all the pointer fields in EXPR. */
1298 lto_output_tree_pointers (ob, expr, ref_p);
1300 /* Mark the end of EXPR. */
1305 /* Emit the integer constant CST to output block OB. If REF_P is true,
1306 CST's type will be emitted as a reference. */
1309 lto_output_integer_cst (struct output_block *ob, tree cst, bool ref_p)
1311 output_record_start (ob, lto_tree_code_to_tag (INTEGER_CST));
1312 lto_output_tree_or_ref (ob, TREE_TYPE (cst), ref_p);
1313 lto_output_1_stream (ob->main_stream, TREE_OVERFLOW_P (cst));
1314 output_uleb128 (ob, TREE_INT_CST_LOW (cst));
1315 output_uleb128 (ob, TREE_INT_CST_HIGH (cst));
1319 /* Emit the physical representation of tree node EXPR to output block
1320 OB. If REF_P is true, the leaves of EXPR are emitted as references
1321 via lto_output_tree_ref. */
1324 lto_output_tree (struct output_block *ob, tree expr, bool ref_p)
1330 if (expr == NULL_TREE)
1336 /* INTEGER_CST nodes are special because they need their original type
1337 to be materialized by the reader (to implement TYPE_CACHED_VALUES). */
1338 if (TREE_CODE (expr) == INTEGER_CST)
1340 lto_output_integer_cst (ob, expr, ref_p);
1344 /* Determine the offset in the stream where EXPR will be written.
1345 This is used when emitting pickle references so the reader knows
1346 where to reconstruct the pickled object from. This allows
1347 circular and forward references within the same stream. */
1348 offset = ob->main_stream->total_size;
1350 existed_p = lto_streamer_cache_insert (ob->writer_cache, expr, &ix, &offset);
1353 /* If a node has already been streamed out, make sure that
1354 we don't write it more than once. Otherwise, the reader
1355 will instantiate two different nodes for the same object. */
1356 output_record_start (ob, LTO_tree_pickle_reference);
1357 output_sleb128 (ob, ix);
1358 output_uleb128 (ob, lto_tree_code_to_tag (TREE_CODE (expr)));
1359 output_uleb128 (ob, offset);
1361 else if (lto_stream_as_builtin_p (expr))
1363 /* MD and NORMAL builtins do not need to be written out
1364 completely as they are always instantiated by the
1365 compiler on startup. The only builtins that need to
1366 be written out are BUILT_IN_FRONTEND. For all other
1367 builtins, we simply write the class and code. */
1368 lto_output_builtin_tree (ob, expr, ix);
1372 /* This is the first time we see EXPR, write its fields
1374 lto_write_tree (ob, expr, ref_p, ix);
1379 /* Output to OB a list of try/catch handlers starting with FIRST. */
1382 output_eh_try_list (struct output_block *ob, eh_catch first)
1386 for (n = first; n; n = n->next_catch)
1388 output_record_start (ob, LTO_eh_catch);
1389 lto_output_tree_ref (ob, n->type_list);
1390 lto_output_tree_ref (ob, n->filter_list);
1391 lto_output_tree_ref (ob, n->label);
1398 /* Output EH region R in function FN to OB. CURR_RN is the slot index
1399 that is being emitted in FN->EH->REGION_ARRAY. This is used to
1400 detect EH region sharing. */
1403 output_eh_region (struct output_block *ob, eh_region r)
1413 if (r->type == ERT_CLEANUP)
1414 tag = LTO_ert_cleanup;
1415 else if (r->type == ERT_TRY)
1417 else if (r->type == ERT_ALLOWED_EXCEPTIONS)
1418 tag = LTO_ert_allowed_exceptions;
1419 else if (r->type == ERT_MUST_NOT_THROW)
1420 tag = LTO_ert_must_not_throw;
1424 output_record_start (ob, tag);
1425 output_sleb128 (ob, r->index);
1428 output_sleb128 (ob, r->outer->index);
1433 output_sleb128 (ob, r->inner->index);
1438 output_sleb128 (ob, r->next_peer->index);
1442 if (r->type == ERT_TRY)
1444 output_eh_try_list (ob, r->u.eh_try.first_catch);
1446 else if (r->type == ERT_ALLOWED_EXCEPTIONS)
1448 lto_output_tree_ref (ob, r->u.allowed.type_list);
1449 lto_output_tree_ref (ob, r->u.allowed.label);
1450 output_uleb128 (ob, r->u.allowed.filter);
1452 else if (r->type == ERT_MUST_NOT_THROW)
1454 lto_output_tree_ref (ob, r->u.must_not_throw.failure_decl);
1455 lto_output_location (ob, r->u.must_not_throw.failure_loc);
1458 if (r->landing_pads)
1459 output_sleb128 (ob, r->landing_pads->index);
1465 /* Output landing pad LP to OB. */
1468 output_eh_lp (struct output_block *ob, eh_landing_pad lp)
1476 output_record_start (ob, LTO_eh_landing_pad);
1477 output_sleb128 (ob, lp->index);
1479 output_sleb128 (ob, lp->next_lp->index);
1484 output_sleb128 (ob, lp->region->index);
1488 lto_output_tree_ref (ob, lp->post_landing_pad);
1492 /* Output the existing eh_table to OB. */
1495 output_eh_regions (struct output_block *ob, struct function *fn)
1497 if (fn->eh && fn->eh->region_tree)
1504 output_record_start (ob, LTO_eh_table);
1506 /* Emit the index of the root of the EH region tree. */
1507 output_sleb128 (ob, fn->eh->region_tree->index);
1509 /* Emit all the EH regions in the region array. */
1510 output_sleb128 (ob, VEC_length (eh_region, fn->eh->region_array));
1511 FOR_EACH_VEC_ELT (eh_region, fn->eh->region_array, i, eh)
1512 output_eh_region (ob, eh);
1514 /* Emit all landing pads. */
1515 output_sleb128 (ob, VEC_length (eh_landing_pad, fn->eh->lp_array));
1516 FOR_EACH_VEC_ELT (eh_landing_pad, fn->eh->lp_array, i, lp)
1517 output_eh_lp (ob, lp);
1519 /* Emit all the runtime type data. */
1520 output_sleb128 (ob, VEC_length (tree, fn->eh->ttype_data));
1521 FOR_EACH_VEC_ELT (tree, fn->eh->ttype_data, i, ttype)
1522 lto_output_tree_ref (ob, ttype);
1524 /* Emit the table of action chains. */
1525 if (targetm.arm_eabi_unwinder)
1528 output_sleb128 (ob, VEC_length (tree, fn->eh->ehspec_data.arm_eabi));
1529 FOR_EACH_VEC_ELT (tree, fn->eh->ehspec_data.arm_eabi, i, t)
1530 lto_output_tree_ref (ob, t);
1535 output_sleb128 (ob, VEC_length (uchar, fn->eh->ehspec_data.other));
1536 FOR_EACH_VEC_ELT (uchar, fn->eh->ehspec_data.other, i, c)
1537 lto_output_1_stream (ob->main_stream, c);
1541 /* The 0 either terminates the record or indicates that there are no
1542 eh_records at all. */
1547 /* Output all of the active ssa names to the ssa_names stream. */
1550 output_ssa_names (struct output_block *ob, struct function *fn)
1552 unsigned int i, len;
1554 len = VEC_length (tree, SSANAMES (fn));
1555 output_uleb128 (ob, len);
1557 for (i = 1; i < len; i++)
1559 tree ptr = VEC_index (tree, SSANAMES (fn), i);
1561 if (ptr == NULL_TREE
1562 || SSA_NAME_IN_FREE_LIST (ptr)
1563 || !is_gimple_reg (ptr))
1566 output_uleb128 (ob, i);
1567 lto_output_1_stream (ob->main_stream, SSA_NAME_IS_DEFAULT_DEF (ptr));
1568 lto_output_tree_ref (ob, SSA_NAME_VAR (ptr));
1575 /* Output the cfg. */
1578 output_cfg (struct output_block *ob, struct function *fn)
1580 struct lto_output_stream *tmp_stream = ob->main_stream;
1583 ob->main_stream = ob->cfg_stream;
1585 output_uleb128 (ob, profile_status_for_function (fn));
1587 /* Output the number of the highest basic block. */
1588 output_uleb128 (ob, last_basic_block_for_function (fn));
1590 FOR_ALL_BB_FN (bb, fn)
1595 output_sleb128 (ob, bb->index);
1597 /* Output the successors and the edge flags. */
1598 output_uleb128 (ob, EDGE_COUNT (bb->succs));
1599 FOR_EACH_EDGE (e, ei, bb->succs)
1601 output_uleb128 (ob, e->dest->index);
1602 output_sleb128 (ob, e->probability);
1603 output_sleb128 (ob, e->count);
1604 output_uleb128 (ob, e->flags);
1608 output_sleb128 (ob, -1);
1610 bb = ENTRY_BLOCK_PTR;
1613 output_sleb128 (ob, bb->next_bb->index);
1617 output_sleb128 (ob, -1);
1619 ob->main_stream = tmp_stream;
1623 /* Output PHI function PHI to the main stream in OB. */
1626 output_phi (struct output_block *ob, gimple phi)
1628 unsigned i, len = gimple_phi_num_args (phi);
1630 output_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI));
1631 output_uleb128 (ob, SSA_NAME_VERSION (PHI_RESULT (phi)));
1633 for (i = 0; i < len; i++)
1635 lto_output_tree_ref (ob, gimple_phi_arg_def (phi, i));
1636 output_uleb128 (ob, gimple_phi_arg_edge (phi, i)->src->index);
1637 lto_output_location (ob, gimple_phi_arg_location (phi, i));
1642 /* Emit statement STMT on the main stream of output block OB. */
1645 output_gimple_stmt (struct output_block *ob, gimple stmt)
1648 enum gimple_code code;
1650 struct bitpack_d bp;
1652 /* Emit identifying tag. */
1653 code = gimple_code (stmt);
1654 tag = lto_gimple_code_to_tag (code);
1655 output_record_start (ob, tag);
1657 /* Emit the tuple header. */
1658 bp = bitpack_create (ob->main_stream);
1659 bp_pack_value (&bp, gimple_num_ops (stmt), sizeof (unsigned) * 8);
1660 bp_pack_value (&bp, gimple_no_warning_p (stmt), 1);
1661 if (is_gimple_assign (stmt))
1662 bp_pack_value (&bp, gimple_assign_nontemporal_move_p (stmt), 1);
1663 bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1);
1664 bp_pack_value (&bp, stmt->gsbase.subcode, 16);
1665 lto_output_bitpack (&bp);
1667 /* Emit location information for the statement. */
1668 lto_output_location (ob, gimple_location (stmt));
1670 /* Emit the lexical block holding STMT. */
1671 lto_output_tree (ob, gimple_block (stmt), true);
1673 /* Emit the operands. */
1674 switch (gimple_code (stmt))
1677 output_sleb128 (ob, gimple_resx_region (stmt));
1680 case GIMPLE_EH_MUST_NOT_THROW:
1681 lto_output_tree_ref (ob, gimple_eh_must_not_throw_fndecl (stmt));
1684 case GIMPLE_EH_DISPATCH:
1685 output_sleb128 (ob, gimple_eh_dispatch_region (stmt));
1689 lto_output_uleb128_stream (ob->main_stream, gimple_asm_ninputs (stmt));
1690 lto_output_uleb128_stream (ob->main_stream, gimple_asm_noutputs (stmt));
1691 lto_output_uleb128_stream (ob->main_stream, gimple_asm_nclobbers (stmt));
1692 lto_output_uleb128_stream (ob->main_stream, gimple_asm_nlabels (stmt));
1693 output_string (ob, ob->main_stream, gimple_asm_string (stmt));
1704 for (i = 0; i < gimple_num_ops (stmt); i++)
1706 tree op = gimple_op (stmt, i);
1707 /* Wrap all uses of non-automatic variables inside MEM_REFs
1708 so that we do not have to deal with type mismatches on
1709 merged symbols during IL read in. */
1713 if (handled_component_p (*basep))
1714 basep = &TREE_OPERAND (*basep, 0);
1715 if (TREE_CODE (*basep) == VAR_DECL
1716 && !auto_var_in_fn_p (*basep, current_function_decl))
1718 bool volatilep = TREE_THIS_VOLATILE (*basep);
1719 *basep = build2 (MEM_REF, TREE_TYPE (*basep),
1720 build_fold_addr_expr (*basep),
1721 build_int_cst (build_pointer_type
1722 (TREE_TYPE (*basep)), 0));
1723 TREE_THIS_VOLATILE (*basep) = volatilep;
1726 lto_output_tree_ref (ob, op);
1731 case GIMPLE_PREDICT:
1740 /* Output a basic block BB to the main stream in OB for this FN. */
1743 output_bb (struct output_block *ob, basic_block bb, struct function *fn)
1745 gimple_stmt_iterator bsi = gsi_start_bb (bb);
1747 output_record_start (ob,
1748 (!gsi_end_p (bsi)) || phi_nodes (bb)
1752 output_uleb128 (ob, bb->index);
1753 output_sleb128 (ob, bb->count);
1754 output_sleb128 (ob, bb->loop_depth);
1755 output_sleb128 (ob, bb->frequency);
1756 output_sleb128 (ob, bb->flags);
1758 if (!gsi_end_p (bsi) || phi_nodes (bb))
1760 /* Output the statements. The list of statements is terminated
1762 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
1765 gimple stmt = gsi_stmt (bsi);
1767 output_gimple_stmt (ob, stmt);
1769 /* Emit the EH region holding STMT. */
1770 region = lookup_stmt_eh_lp_fn (fn, stmt);
1773 output_record_start (ob, LTO_eh_region);
1774 output_sleb128 (ob, region);
1782 for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi))
1784 gimple phi = gsi_stmt (bsi);
1786 /* Only emit PHIs for gimple registers. PHI nodes for .MEM
1787 will be filled in on reading when the SSA form is
1789 if (is_gimple_reg (gimple_phi_result (phi)))
1790 output_phi (ob, phi);
1797 /* Create the header in the file using OB. If the section type is for
1798 a function, set FN to the decl for that function. */
1801 produce_asm (struct output_block *ob, tree fn)
1803 enum lto_section_type section_type = ob->section_type;
1804 struct lto_function_header header;
1806 struct lto_output_stream *header_stream;
1808 if (section_type == LTO_section_function_body)
1810 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn));
1811 section_name = lto_get_section_name (section_type, name, NULL);
1814 section_name = lto_get_section_name (section_type, NULL, NULL);
1816 lto_begin_section (section_name, !flag_wpa);
1817 free (section_name);
1819 /* The entire header is stream computed here. */
1820 memset (&header, 0, sizeof (struct lto_function_header));
1822 /* Write the header. */
1823 header.lto_header.major_version = LTO_major_version;
1824 header.lto_header.minor_version = LTO_minor_version;
1825 header.lto_header.section_type = section_type;
1827 header.compressed_size = 0;
1829 if (section_type == LTO_section_function_body)
1830 header.cfg_size = ob->cfg_stream->total_size;
1831 header.main_size = ob->main_stream->total_size;
1832 header.string_size = ob->string_stream->total_size;
1834 header_stream = XCNEW (struct lto_output_stream);
1835 lto_output_data_stream (header_stream, &header, sizeof header);
1836 lto_write_stream (header_stream);
1837 free (header_stream);
1839 /* Put all of the gimple and the string table out the asm file as a
1841 if (section_type == LTO_section_function_body)
1842 lto_write_stream (ob->cfg_stream);
1843 lto_write_stream (ob->main_stream);
1844 lto_write_stream (ob->string_stream);
1850 /* Output the body of function NODE->DECL. */
1853 output_function (struct cgraph_node *node)
1855 struct bitpack_d bp;
1857 struct function *fn;
1859 struct output_block *ob;
1863 function = node->decl;
1864 fn = DECL_STRUCT_FUNCTION (function);
1865 ob = create_output_block (LTO_section_function_body);
1867 clear_line_info (ob);
1868 ob->cgraph_node = node;
1870 gcc_assert (current_function_decl == NULL_TREE && cfun == NULL);
1872 /* Set current_function_decl and cfun. */
1873 current_function_decl = function;
1876 /* Make string 0 be a NULL string. */
1877 lto_output_1_stream (ob->string_stream, 0);
1879 output_record_start (ob, LTO_function);
1881 /* Write all the attributes for FN. */
1882 bp = bitpack_create (ob->main_stream);
1883 bp_pack_value (&bp, fn->is_thunk, 1);
1884 bp_pack_value (&bp, fn->has_local_explicit_reg_vars, 1);
1885 bp_pack_value (&bp, fn->after_tree_profile, 1);
1886 bp_pack_value (&bp, fn->returns_pcc_struct, 1);
1887 bp_pack_value (&bp, fn->returns_struct, 1);
1888 bp_pack_value (&bp, fn->can_throw_non_call_exceptions, 1);
1889 bp_pack_value (&bp, fn->always_inline_functions_inlined, 1);
1890 bp_pack_value (&bp, fn->after_inlining, 1);
1891 bp_pack_value (&bp, fn->dont_save_pending_sizes_p, 1);
1892 bp_pack_value (&bp, fn->stdarg, 1);
1893 bp_pack_value (&bp, fn->has_nonlocal_label, 1);
1894 bp_pack_value (&bp, fn->calls_alloca, 1);
1895 bp_pack_value (&bp, fn->calls_setjmp, 1);
1896 bp_pack_value (&bp, fn->va_list_fpr_size, 8);
1897 bp_pack_value (&bp, fn->va_list_gpr_size, 8);
1898 lto_output_bitpack (&bp);
1900 /* Output current IL state of the function. */
1901 output_uleb128 (ob, fn->curr_properties);
1903 /* Output the static chain and non-local goto save area. */
1904 lto_output_tree_ref (ob, fn->static_chain_decl);
1905 lto_output_tree_ref (ob, fn->nonlocal_goto_save_area);
1907 /* Output all the local variables in the function. */
1908 output_sleb128 (ob, VEC_length (tree, fn->local_decls));
1909 FOR_EACH_VEC_ELT (tree, fn->local_decls, i, t)
1910 lto_output_tree_ref (ob, t);
1912 /* Output the head of the arguments list. */
1913 lto_output_tree_ref (ob, DECL_ARGUMENTS (function));
1915 /* Output all the SSA names used in the function. */
1916 output_ssa_names (ob, fn);
1918 /* Output any exception handling regions. */
1919 output_eh_regions (ob, fn);
1921 /* Output DECL_INITIAL for the function, which contains the tree of
1923 lto_output_tree (ob, DECL_INITIAL (function), true);
1925 /* We will renumber the statements. The code that does this uses
1926 the same ordering that we use for serializing them so we can use
1927 the same code on the other end and not have to write out the
1928 statement numbers. */
1929 renumber_gimple_stmt_uids ();
1931 /* Output the code for the function. */
1932 FOR_ALL_BB_FN (bb, fn)
1933 output_bb (ob, bb, fn);
1935 /* The terminator for this function. */
1938 output_cfg (ob, fn);
1940 /* Create a section to hold the pickled output of this function. */
1941 produce_asm (ob, function);
1943 destroy_output_block (ob);
1945 current_function_decl = NULL;
1950 /* Return true if alias pair P belongs to the set of cgraph nodes in
1951 SET. If P is a an alias for a VAR_DECL, it can always be emitted.
1952 However, for FUNCTION_DECL aliases, we should only output the pair
1953 if it belongs to a function whose cgraph node is in SET.
1954 Otherwise, the LTRANS phase will get into trouble when finalizing
1955 aliases because the alias will refer to a function not defined in
1956 the file processed by LTRANS. */
1959 output_alias_pair_p (alias_pair *p, cgraph_node_set set, varpool_node_set vset)
1961 if (TREE_CODE (p->decl) == VAR_DECL)
1962 return varpool_node_in_set_p (varpool_node_for_asm (p->target), vset);
1964 /* Check if the assembler name for P->TARGET has its cgraph node in SET. */
1965 gcc_assert (TREE_CODE (p->decl) == FUNCTION_DECL);
1966 return cgraph_node_in_set_p (cgraph_node_for_asm (p->target), set);
1970 /* Output any unreferenced global symbol defined in SET, alias pairs
1974 output_unreferenced_globals (cgraph_node_set set, varpool_node_set vset)
1976 struct output_block *ob;
1979 struct varpool_node *vnode;
1981 ob = create_output_block (LTO_section_static_initializer);
1982 ob->cgraph_node = NULL;
1984 clear_line_info (ob);
1986 /* Make string 0 be a NULL string. */
1987 lto_output_1_stream (ob->string_stream, 0);
1989 /* Emit references for all the global symbols. If a global symbol
1990 was never referenced in any of the functions of this file, it
1991 would not be emitted otherwise. This will result in unreferenced
1992 symbols at link time if a file defines a global symbol but
1993 never references it. */
1994 FOR_EACH_STATIC_VARIABLE (vnode)
1995 if (vnode->needed && varpool_node_in_set_p (vnode, vset))
1997 tree var = vnode->decl;
1999 if (TREE_CODE (var) == VAR_DECL)
2001 /* Output the object in order to output references used in the
2003 lto_output_tree (ob, var, true);
2005 /* If it is public we also need a reference to the object itself. */
2006 if (TREE_PUBLIC (var))
2007 lto_output_tree_ref (ob, var);
2013 /* Emit the alias pairs for the nodes in SET. */
2014 FOR_EACH_VEC_ELT (alias_pair, alias_pairs, i, p)
2016 if (output_alias_pair_p (p, set, vset))
2018 lto_output_tree_ref (ob, p->decl);
2019 lto_output_tree_ref (ob, p->target);
2025 produce_asm (ob, NULL);
2026 destroy_output_block (ob);
2030 /* Copy the function body of NODE without deserializing. */
2033 copy_function (struct cgraph_node *node)
2035 tree function = node->decl;
2036 struct lto_file_decl_data *file_data = node->local.lto_file_data;
2037 struct lto_output_stream *output_stream = XCNEW (struct lto_output_stream);
2040 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (function));
2041 char *section_name =
2042 lto_get_section_name (LTO_section_function_body, name, NULL);
2044 struct lto_in_decl_state *in_state;
2045 struct lto_out_decl_state *out_state = lto_get_out_decl_state ();
2047 lto_begin_section (section_name, !flag_wpa);
2048 free (section_name);
2050 /* We may have renamed the declaration, e.g., a static function. */
2051 name = lto_get_decl_name_mapping (file_data, name);
2053 data = lto_get_section_data (file_data, LTO_section_function_body,
2057 /* Do a bit copy of the function body. */
2058 lto_output_data_stream (output_stream, data, len);
2059 lto_write_stream (output_stream);
2063 lto_get_function_in_decl_state (node->local.lto_file_data, function);
2064 gcc_assert (in_state);
2066 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2068 size_t n = in_state->streams[i].size;
2069 tree *trees = in_state->streams[i].trees;
2070 struct lto_tree_ref_encoder *encoder = &(out_state->streams[i]);
2072 /* The out state must have the same indices and the in state.
2073 So just copy the vector. All the encoders in the in state
2074 must be empty where we reach here. */
2075 gcc_assert (lto_tree_ref_encoder_size (encoder) == 0);
2076 for (j = 0; j < n; j++)
2077 VEC_safe_push (tree, heap, encoder->trees, trees[j]);
2078 encoder->next_index = n;
2081 lto_free_section_data (file_data, LTO_section_function_body, name,
2083 free (output_stream);
2088 /* Initialize the LTO writer. */
2091 lto_writer_init (void)
2093 lto_streamer_init ();
2097 /* Main entry point from the pass manager. */
2100 lto_output (cgraph_node_set set, varpool_node_set vset)
2102 struct cgraph_node *node;
2103 struct lto_out_decl_state *decl_state;
2104 #ifdef ENABLE_CHECKING
2105 bitmap output = lto_bitmap_alloc ();
2108 lto_cgraph_encoder_t encoder = lto_get_out_decl_state ()->cgraph_node_encoder;
2112 n_nodes = lto_cgraph_encoder_size (encoder);
2113 /* Process only the functions with bodies. */
2114 for (i = 0; i < n_nodes; i++)
2116 node = lto_cgraph_encoder_deref (encoder, i);
2117 if (lto_cgraph_encoder_encode_body_p (encoder, node))
2119 #ifdef ENABLE_CHECKING
2120 gcc_assert (!bitmap_bit_p (output, DECL_UID (node->decl)));
2121 bitmap_set_bit (output, DECL_UID (node->decl));
2123 decl_state = lto_new_out_decl_state ();
2124 lto_push_out_decl_state (decl_state);
2125 if (gimple_has_body_p (node->decl))
2126 output_function (node);
2128 copy_function (node);
2129 gcc_assert (lto_get_out_decl_state () == decl_state);
2130 lto_pop_out_decl_state ();
2131 lto_record_function_out_decl_state (node->decl, decl_state);
2135 /* Emit the callgraph after emitting function bodies. This needs to
2136 be done now to make sure that all the statements in every function
2137 have been renumbered so that edges can be associated with call
2138 statements using the statement UIDs. */
2139 output_cgraph (set, vset);
2141 #ifdef ENABLE_CHECKING
2142 lto_bitmap_free (output);
2146 struct ipa_opt_pass_d pass_ipa_lto_gimple_out =
2150 "lto_gimple_out", /* name */
2151 gate_lto_out, /* gate */
2155 0, /* static_pass_number */
2156 TV_IPA_LTO_GIMPLE_OUT, /* tv_id */
2157 0, /* properties_required */
2158 0, /* properties_provided */
2159 0, /* properties_destroyed */
2160 0, /* todo_flags_start */
2161 TODO_dump_func /* todo_flags_finish */
2163 NULL, /* generate_summary */
2164 lto_output, /* write_summary */
2165 NULL, /* read_summary */
2166 lto_output, /* write_optimization_summary */
2167 NULL, /* read_optimization_summary */
2168 NULL, /* stmt_fixup */
2170 NULL, /* function_transform */
2171 NULL /* variable_transform */
2175 /* Write each node in encoded by ENCODER to OB, as well as those reachable
2176 from it and required for correct representation of its semantics.
2177 Each node in ENCODER must be a global declaration or a type. A node
2178 is written only once, even if it appears multiple times in the
2179 vector. Certain transitively-reachable nodes, such as those
2180 representing expressions, may be duplicated, but such nodes
2181 must not appear in ENCODER itself. */
2184 write_global_stream (struct output_block *ob,
2185 struct lto_tree_ref_encoder *encoder)
2189 const size_t size = lto_tree_ref_encoder_size (encoder);
2191 for (index = 0; index < size; index++)
2193 t = lto_tree_ref_encoder_get_tree (encoder, index);
2194 if (!lto_streamer_cache_lookup (ob->writer_cache, t, NULL))
2195 lto_output_tree (ob, t, false);
2200 /* Write a sequence of indices into the globals vector corresponding
2201 to the trees in ENCODER. These are used by the reader to map the
2202 indices used to refer to global entities within function bodies to
2206 write_global_references (struct output_block *ob,
2207 struct lto_output_stream *ref_stream,
2208 struct lto_tree_ref_encoder *encoder)
2212 const int32_t size = lto_tree_ref_encoder_size (encoder);
2214 /* Write size as 32-bit unsigned. */
2215 lto_output_data_stream (ref_stream, &size, sizeof (int32_t));
2217 for (index = 0; index < size; index++)
2221 t = lto_tree_ref_encoder_get_tree (encoder, index);
2222 lto_streamer_cache_lookup (ob->writer_cache, t, &slot_num);
2223 gcc_assert (slot_num >= 0);
2224 lto_output_data_stream (ref_stream, &slot_num, sizeof slot_num);
2229 /* Write all the streams in an lto_out_decl_state STATE using
2230 output block OB and output stream OUT_STREAM. */
2233 lto_output_decl_state_streams (struct output_block *ob,
2234 struct lto_out_decl_state *state)
2238 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2239 write_global_stream (ob, &state->streams[i]);
2243 /* Write all the references in an lto_out_decl_state STATE using
2244 output block OB and output stream OUT_STREAM. */
2247 lto_output_decl_state_refs (struct output_block *ob,
2248 struct lto_output_stream *out_stream,
2249 struct lto_out_decl_state *state)
2255 /* Write reference to FUNCTION_DECL. If there is not function,
2256 write reference to void_type_node. */
2257 decl = (state->fn_decl) ? state->fn_decl : void_type_node;
2258 lto_streamer_cache_lookup (ob->writer_cache, decl, &ref);
2259 gcc_assert (ref >= 0);
2260 lto_output_data_stream (out_stream, &ref, sizeof (int32_t));
2262 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2263 write_global_references (ob, out_stream, &state->streams[i]);
2267 /* Return the written size of STATE. */
2270 lto_out_decl_state_written_size (struct lto_out_decl_state *state)
2275 size = sizeof (int32_t); /* fn_ref. */
2276 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2278 size += sizeof (int32_t); /* vector size. */
2279 size += (lto_tree_ref_encoder_size (&state->streams[i])
2280 * sizeof (int32_t));
2286 /* Write symbol T into STREAM in CACHE. SEEN specify symbols we wrote so
2290 write_symbol (struct lto_streamer_cache_d *cache,
2291 struct lto_output_stream *stream,
2292 tree t, bitmap seen, bool alias)
2295 enum gcc_plugin_symbol_kind kind;
2296 enum gcc_plugin_symbol_visibility visibility;
2301 /* None of the following kinds of symbols are needed in the
2303 if (!TREE_PUBLIC (t)
2304 || is_builtin_fn (t)
2305 || DECL_ABSTRACT (t)
2306 || TREE_CODE (t) == RESULT_DECL)
2309 gcc_assert (TREE_CODE (t) == VAR_DECL
2310 || TREE_CODE (t) == FUNCTION_DECL);
2312 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (t));
2314 /* FIXME lto: this is from assemble_name_raw in varasm.c. For some
2315 architectures we might have to do the same name manipulations that
2316 ASM_OUTPUT_LABELREF does. */
2320 lto_streamer_cache_lookup (cache, t, &slot_num);
2321 gcc_assert (slot_num >= 0);
2323 /* Avoid duplicate symbols. */
2324 if (!bitmap_set_bit (seen, slot_num))
2327 if (DECL_EXTERNAL (t))
2330 kind = GCCPK_WEAKUNDEF;
2337 kind = GCCPK_WEAKDEF;
2338 else if (DECL_COMMON (t))
2339 kind = GCCPK_COMMON;
2343 /* When something is defined, it should have a node attached.
2344 FIXME: For fortran this is still not the case since wrapup global
2345 decls is done after streaming. */
2346 gcc_assert (alias || TREE_CODE (t) != FUNCTION_DECL
2347 || (cgraph_get_node (t)
2348 && cgraph_get_node (t)->analyzed));
2351 /* Imitate what default_elf_asm_output_external do.
2352 When symbol is external, we need to output it with DEFAULT visibility
2353 when compiling with -fvisibility=default, while with HIDDEN visibility
2354 when symbol has attribute (visibility("hidden")) specified.
2355 targetm.binds_local_p check DECL_VISIBILITY_SPECIFIED and gets this
2358 if (DECL_EXTERNAL (t)
2359 && !targetm.binds_local_p (t))
2360 visibility = GCCPV_DEFAULT;
2362 switch (DECL_VISIBILITY(t))
2364 case VISIBILITY_DEFAULT:
2365 visibility = GCCPV_DEFAULT;
2367 case VISIBILITY_PROTECTED:
2368 visibility = GCCPV_PROTECTED;
2370 case VISIBILITY_HIDDEN:
2371 visibility = GCCPV_HIDDEN;
2373 case VISIBILITY_INTERNAL:
2374 visibility = GCCPV_INTERNAL;
2378 if (kind == GCCPK_COMMON
2380 && TREE_CODE (DECL_SIZE (t)) == INTEGER_CST)
2381 size = (((uint64_t) TREE_INT_CST_HIGH (DECL_SIZE (t))) << 32)
2382 | TREE_INT_CST_LOW (DECL_SIZE (t));
2386 if (DECL_ONE_ONLY (t))
2387 comdat = IDENTIFIER_POINTER (DECL_COMDAT_GROUP (t));
2391 lto_output_data_stream (stream, name, strlen (name) + 1);
2392 lto_output_data_stream (stream, comdat, strlen (comdat) + 1);
2393 lto_output_data_stream (stream, &kind, 1);
2394 lto_output_data_stream (stream, &visibility, 1);
2395 lto_output_data_stream (stream, &size, 8);
2396 lto_output_data_stream (stream, &slot_num, 4);
2400 /* Write an IL symbol table to OB.
2401 SET and VSET are cgraph/varpool node sets we are outputting. */
2404 produce_symtab (struct output_block *ob,
2405 cgraph_node_set set, varpool_node_set vset)
2407 struct lto_streamer_cache_d *cache = ob->writer_cache;
2408 char *section_name = lto_get_section_name (LTO_section_symtab, NULL, NULL);
2410 struct cgraph_node *node, *alias;
2411 struct varpool_node *vnode, *valias;
2412 struct lto_output_stream stream;
2413 lto_varpool_encoder_t varpool_encoder = ob->decl_state->varpool_node_encoder;
2414 lto_cgraph_encoder_t encoder = ob->decl_state->cgraph_node_encoder;
2418 lto_begin_section (section_name, false);
2419 free (section_name);
2421 seen = lto_bitmap_alloc ();
2422 memset (&stream, 0, sizeof (stream));
2424 /* Write all functions. */
2425 for (i = 0; i < lto_cgraph_encoder_size (encoder); i++)
2427 node = lto_cgraph_encoder_deref (encoder, i);
2430 write_symbol (cache, &stream, node->decl, seen, false);
2431 for (alias = node->same_body; alias; alias = alias->next)
2432 write_symbol (cache, &stream, alias->decl, seen, true);
2435 /* Write all variables. */
2436 for (i = 0; i < lto_varpool_encoder_size (varpool_encoder); i++)
2438 vnode = lto_varpool_encoder_deref (varpool_encoder, i);
2441 write_symbol (cache, &stream, vnode->decl, seen, false);
2442 for (valias = vnode->extra_name; valias; valias = valias->next)
2443 write_symbol (cache, &stream, valias->decl, seen, true);
2446 /* Write all aliases. */
2447 FOR_EACH_VEC_ELT (alias_pair, alias_pairs, i, p)
2448 if (output_alias_pair_p (p, set, vset))
2449 write_symbol (cache, &stream, p->decl, seen, true);
2451 lto_write_stream (&stream);
2452 lto_bitmap_free (seen);
2458 /* This pass is run after all of the functions are serialized and all
2459 of the IPA passes have written their serialized forms. This pass
2460 causes the vector of all of the global decls and types used from
2461 this file to be written in to a section that can then be read in to
2462 recover these on other side. */
2465 produce_asm_for_decls (cgraph_node_set set, varpool_node_set vset)
2467 struct lto_out_decl_state *out_state;
2468 struct lto_out_decl_state *fn_out_state;
2469 struct lto_decl_header header;
2471 struct output_block *ob;
2472 struct lto_output_stream *header_stream, *decl_state_stream;
2473 unsigned idx, num_fns;
2474 size_t decl_state_size;
2475 int32_t num_decl_states;
2477 ob = create_output_block (LTO_section_decls);
2480 /* Write out unreferenced globals, alias pairs and labels. We defer
2481 doing this until now so that we can write out only what is
2483 output_unreferenced_globals (set, vset);
2485 memset (&header, 0, sizeof (struct lto_decl_header));
2487 section_name = lto_get_section_name (LTO_section_decls, NULL, NULL);
2488 lto_begin_section (section_name, !flag_wpa);
2489 free (section_name);
2491 /* Make string 0 be a NULL string. */
2492 lto_output_1_stream (ob->string_stream, 0);
2494 /* Write the global symbols. */
2495 out_state = lto_get_out_decl_state ();
2496 num_fns = VEC_length (lto_out_decl_state_ptr, lto_function_decl_states);
2497 lto_output_decl_state_streams (ob, out_state);
2498 for (idx = 0; idx < num_fns; idx++)
2501 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2502 lto_output_decl_state_streams (ob, fn_out_state);
2505 header.lto_header.major_version = LTO_major_version;
2506 header.lto_header.minor_version = LTO_minor_version;
2507 header.lto_header.section_type = LTO_section_decls;
2509 /* Currently not used. This field would allow us to preallocate
2510 the globals vector, so that it need not be resized as it is extended. */
2511 header.num_nodes = -1;
2513 /* Compute the total size of all decl out states. */
2514 decl_state_size = sizeof (int32_t);
2515 decl_state_size += lto_out_decl_state_written_size (out_state);
2516 for (idx = 0; idx < num_fns; idx++)
2519 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2520 decl_state_size += lto_out_decl_state_written_size (fn_out_state);
2522 header.decl_state_size = decl_state_size;
2524 header.main_size = ob->main_stream->total_size;
2525 header.string_size = ob->string_stream->total_size;
2527 header_stream = XCNEW (struct lto_output_stream);
2528 lto_output_data_stream (header_stream, &header, sizeof header);
2529 lto_write_stream (header_stream);
2530 free (header_stream);
2532 /* Write the main out-decl state, followed by out-decl states of
2534 decl_state_stream = ((struct lto_output_stream *)
2535 xcalloc (1, sizeof (struct lto_output_stream)));
2536 num_decl_states = num_fns + 1;
2537 lto_output_data_stream (decl_state_stream, &num_decl_states,
2538 sizeof (num_decl_states));
2539 lto_output_decl_state_refs (ob, decl_state_stream, out_state);
2540 for (idx = 0; idx < num_fns; idx++)
2543 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2544 lto_output_decl_state_refs (ob, decl_state_stream, fn_out_state);
2546 lto_write_stream (decl_state_stream);
2547 free(decl_state_stream);
2549 lto_write_stream (ob->main_stream);
2550 lto_write_stream (ob->string_stream);
2554 /* Write the symbol table. It is used by linker to determine dependencies
2555 and thus we can skip it for WPA. */
2557 produce_symtab (ob, set, vset);
2559 /* Write command line opts. */
2560 lto_write_options ();
2562 /* Deallocate memory and clean up. */
2563 for (idx = 0; idx < num_fns; idx++)
2566 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2567 lto_delete_out_decl_state (fn_out_state);
2569 lto_cgraph_encoder_delete (ob->decl_state->cgraph_node_encoder);
2570 lto_varpool_encoder_delete (ob->decl_state->varpool_node_encoder);
2571 VEC_free (lto_out_decl_state_ptr, heap, lto_function_decl_states);
2572 lto_function_decl_states = NULL;
2573 destroy_output_block (ob);
2577 struct ipa_opt_pass_d pass_ipa_lto_finish_out =
2581 "lto_decls_out", /* name */
2582 gate_lto_out, /* gate */
2586 0, /* static_pass_number */
2587 TV_IPA_LTO_DECL_OUT, /* tv_id */
2588 0, /* properties_required */
2589 0, /* properties_provided */
2590 0, /* properties_destroyed */
2591 0, /* todo_flags_start */
2592 0 /* todo_flags_finish */
2594 NULL, /* generate_summary */
2595 produce_asm_for_decls, /* write_summary */
2596 NULL, /* read_summary */
2597 produce_asm_for_decls, /* write_optimization_summary */
2598 NULL, /* read_optimization_summary */
2599 NULL, /* stmt_fixup */
2601 NULL, /* function_transform */
2602 NULL /* variable_transform */