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"
33 #include "basic-block.h"
34 #include "tree-flow.h"
35 #include "tree-pass.h"
39 #include "diagnostic-core.h"
42 #include "lto-symtab.h"
43 #include "lto-streamer.h"
50 unsigned int slot_num;
54 /* Returns a hash code for P. */
57 hash_string_slot_node (const void *p)
59 const struct string_slot *ds = (const struct string_slot *) p;
60 return (hashval_t) htab_hash_string (ds->s);
64 /* Returns nonzero if P1 and P2 are equal. */
67 eq_string_slot_node (const void *p1, const void *p2)
69 const struct string_slot *ds1 = (const struct string_slot *) p1;
70 const struct string_slot *ds2 = (const struct string_slot *) p2;
72 if (ds1->len == ds2->len)
75 for (i = 0; i < ds1->len; i++)
76 if (ds1->s[i] != ds2->s[i])
85 /* Free the string slot pointed-to by P. */
88 string_slot_free (void *p)
90 struct string_slot *slot = (struct string_slot *) p;
91 free (CONST_CAST (void *, (const void *) slot->s));
96 /* Clear the line info stored in DATA_IN. */
99 clear_line_info (struct output_block *ob)
101 ob->current_file = NULL;
102 ob->current_line = 0;
107 /* Create the output block and return it. SECTION_TYPE is
108 LTO_section_function_body or LTO_static_initializer. */
110 struct output_block *
111 create_output_block (enum lto_section_type section_type)
113 struct output_block *ob = XCNEW (struct output_block);
115 ob->section_type = section_type;
116 ob->decl_state = lto_get_out_decl_state ();
117 ob->main_stream = XCNEW (struct lto_output_stream);
118 ob->string_stream = XCNEW (struct lto_output_stream);
119 ob->writer_cache = lto_streamer_cache_create ();
121 if (section_type == LTO_section_function_body)
122 ob->cfg_stream = XCNEW (struct lto_output_stream);
124 clear_line_info (ob);
126 ob->string_hash_table = htab_create (37, hash_string_slot_node,
127 eq_string_slot_node, string_slot_free);
133 /* Destroy the output block OB. */
136 destroy_output_block (struct output_block *ob)
138 enum lto_section_type section_type = ob->section_type;
140 htab_delete (ob->string_hash_table);
142 free (ob->main_stream);
143 free (ob->string_stream);
144 if (section_type == LTO_section_function_body)
145 free (ob->cfg_stream);
147 lto_streamer_cache_delete (ob->writer_cache);
153 /* Output STRING of LEN characters to the string
154 table in OB. The string might or might not include a trailing '\0'.
155 Then put the index onto the INDEX_STREAM. */
158 output_string_with_length (struct output_block *ob,
159 struct lto_output_stream *index_stream,
163 struct string_slot **slot;
164 struct string_slot s_slot;
165 char *string = (char *) xmalloc (len + 1);
166 memcpy (string, s, len);
173 slot = (struct string_slot **) htab_find_slot (ob->string_hash_table,
177 struct lto_output_stream *string_stream = ob->string_stream;
178 unsigned int start = string_stream->total_size;
179 struct string_slot *new_slot
180 = (struct string_slot *) xmalloc (sizeof (struct string_slot));
183 new_slot->s = string;
185 new_slot->slot_num = start;
187 lto_output_uleb128_stream (index_stream, start);
188 lto_output_uleb128_stream (string_stream, len);
189 for (i = 0; i < len; i++)
190 lto_output_1_stream (string_stream, string[i]);
194 struct string_slot *old_slot = (struct string_slot *)*slot;
195 lto_output_uleb128_stream (index_stream, old_slot->slot_num);
200 /* Output the '\0' terminated STRING to the string
201 table in OB. Then put the index onto the INDEX_STREAM. */
204 output_string (struct output_block *ob,
205 struct lto_output_stream *index_stream,
210 lto_output_uleb128_stream (index_stream, 0);
211 output_string_with_length (ob, index_stream, string, strlen (string) + 1);
214 lto_output_uleb128_stream (index_stream, 1);
218 /* Output the STRING constant to the string
219 table in OB. Then put the index onto the INDEX_STREAM. */
222 output_string_cst (struct output_block *ob,
223 struct lto_output_stream *index_stream,
228 lto_output_uleb128_stream (index_stream, 0);
229 output_string_with_length (ob, index_stream,
230 TREE_STRING_POINTER (string),
231 TREE_STRING_LENGTH (string));
234 lto_output_uleb128_stream (index_stream, 1);
238 /* Output the identifier ID to the string
239 table in OB. Then put the index onto the INDEX_STREAM. */
242 output_identifier (struct output_block *ob,
243 struct lto_output_stream *index_stream,
248 lto_output_uleb128_stream (index_stream, 0);
249 output_string_with_length (ob, index_stream,
250 IDENTIFIER_POINTER (id),
251 IDENTIFIER_LENGTH (id));
254 lto_output_uleb128_stream (index_stream, 1);
257 /* Write a zero to the output stream. */
260 output_zero (struct output_block *ob)
262 lto_output_1_stream (ob->main_stream, 0);
266 /* Output an unsigned LEB128 quantity to OB->main_stream. */
269 output_uleb128 (struct output_block *ob, unsigned HOST_WIDE_INT work)
271 lto_output_uleb128_stream (ob->main_stream, work);
275 /* Output a signed LEB128 quantity to OB->main_stream. */
278 output_sleb128 (struct output_block *ob, HOST_WIDE_INT work)
280 lto_output_sleb128_stream (ob->main_stream, work);
284 /* Output the start of a record with TAG to output block OB. */
287 output_record_start (struct output_block *ob, enum LTO_tags tag)
289 /* Make sure TAG fits inside an unsigned int. */
290 gcc_assert (tag == (enum LTO_tags) (unsigned) tag);
291 output_uleb128 (ob, tag);
295 /* Look up NODE in the type table and write the index for it to OB. */
298 output_type_ref (struct output_block *ob, tree node)
300 output_record_start (ob, LTO_type_ref);
301 lto_output_type_ref_index (ob->decl_state, ob->main_stream, node);
305 /* Pack all the non-pointer fields of the TS_BASE structure of
306 expression EXPR into bitpack BP. */
309 pack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
311 bp_pack_value (bp, TREE_CODE (expr), 16);
314 bp_pack_value (bp, TREE_SIDE_EFFECTS (expr), 1);
315 bp_pack_value (bp, TREE_CONSTANT (expr), 1);
316 bp_pack_value (bp, TREE_READONLY (expr), 1);
318 /* TREE_PUBLIC is used on types to indicate that the type
319 has a TYPE_CACHED_VALUES vector. This is not streamed out,
320 so we skip it here. */
321 bp_pack_value (bp, TREE_PUBLIC (expr), 1);
324 bp_pack_value (bp, 0, 4);
325 bp_pack_value (bp, TREE_ADDRESSABLE (expr), 1);
326 bp_pack_value (bp, TREE_THIS_VOLATILE (expr), 1);
328 bp_pack_value (bp, DECL_UNSIGNED (expr), 1);
329 else if (TYPE_P (expr))
330 bp_pack_value (bp, TYPE_UNSIGNED (expr), 1);
332 bp_pack_value (bp, 0, 1);
333 /* We write debug info two times, do not confuse the second one. */
334 bp_pack_value (bp, TYPE_P (expr) ? 0 : TREE_ASM_WRITTEN (expr), 1);
335 bp_pack_value (bp, TREE_NO_WARNING (expr), 1);
336 bp_pack_value (bp, TREE_USED (expr), 1);
337 bp_pack_value (bp, TREE_NOTHROW (expr), 1);
338 bp_pack_value (bp, TREE_STATIC (expr), 1);
339 bp_pack_value (bp, TREE_PRIVATE (expr), 1);
340 bp_pack_value (bp, TREE_PROTECTED (expr), 1);
341 bp_pack_value (bp, TREE_DEPRECATED (expr), 1);
343 bp_pack_value (bp, TYPE_SATURATING (expr), 1);
344 else if (TREE_CODE (expr) == SSA_NAME)
345 bp_pack_value (bp, SSA_NAME_IS_DEFAULT_DEF (expr), 1);
347 bp_pack_value (bp, 0, 1);
351 /* Pack all the non-pointer fields of the TS_REAL_CST structure of
352 expression EXPR into bitpack BP. */
355 pack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
360 r = TREE_REAL_CST (expr);
361 bp_pack_value (bp, r.cl, 2);
362 bp_pack_value (bp, r.decimal, 1);
363 bp_pack_value (bp, r.sign, 1);
364 bp_pack_value (bp, r.signalling, 1);
365 bp_pack_value (bp, r.canonical, 1);
366 bp_pack_value (bp, r.uexp, EXP_BITS);
367 for (i = 0; i < SIGSZ; i++)
368 bp_pack_value (bp, r.sig[i], HOST_BITS_PER_LONG);
372 /* Pack all the non-pointer fields of the TS_FIXED_CST structure of
373 expression EXPR into bitpack BP. */
376 pack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
378 struct fixed_value fv = TREE_FIXED_CST (expr);
379 bp_pack_value (bp, fv.data.low, HOST_BITS_PER_WIDE_INT);
380 bp_pack_value (bp, fv.data.high, HOST_BITS_PER_WIDE_INT);
381 bp_pack_value (bp, fv.mode, HOST_BITS_PER_INT);
385 /* Pack all the non-pointer fields of the TS_DECL_COMMON structure
386 of expression EXPR into bitpack BP. */
389 pack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
391 bp_pack_value (bp, DECL_MODE (expr), 8);
392 bp_pack_value (bp, DECL_NONLOCAL (expr), 1);
393 bp_pack_value (bp, DECL_VIRTUAL_P (expr), 1);
394 bp_pack_value (bp, DECL_IGNORED_P (expr), 1);
395 bp_pack_value (bp, DECL_ABSTRACT (expr), 1);
396 bp_pack_value (bp, DECL_ARTIFICIAL (expr), 1);
397 bp_pack_value (bp, DECL_USER_ALIGN (expr), 1);
398 bp_pack_value (bp, DECL_PRESERVE_P (expr), 1);
399 bp_pack_value (bp, DECL_DEBUG_EXPR_IS_FROM (expr), 1);
400 bp_pack_value (bp, DECL_EXTERNAL (expr), 1);
401 bp_pack_value (bp, DECL_GIMPLE_REG_P (expr), 1);
402 bp_pack_value (bp, DECL_ALIGN (expr), HOST_BITS_PER_INT);
404 if (TREE_CODE (expr) == LABEL_DECL)
406 /* Note that we do not write LABEL_DECL_UID. The reader will
407 always assume an initial value of -1 so that the
408 label_to_block_map is recreated by gimple_set_bb. */
409 bp_pack_value (bp, DECL_ERROR_ISSUED (expr), 1);
410 bp_pack_value (bp, EH_LANDING_PAD_NR (expr), HOST_BITS_PER_INT);
413 if (TREE_CODE (expr) == FIELD_DECL)
415 bp_pack_value (bp, DECL_PACKED (expr), 1);
416 bp_pack_value (bp, DECL_NONADDRESSABLE_P (expr), 1);
417 bp_pack_value (bp, DECL_OFFSET_ALIGN (expr), 8);
420 if (TREE_CODE (expr) == RESULT_DECL
421 || TREE_CODE (expr) == PARM_DECL
422 || TREE_CODE (expr) == VAR_DECL)
424 bp_pack_value (bp, DECL_BY_REFERENCE (expr), 1);
425 if (TREE_CODE (expr) == VAR_DECL
426 || TREE_CODE (expr) == PARM_DECL)
427 bp_pack_value (bp, DECL_HAS_VALUE_EXPR_P (expr), 1);
428 bp_pack_value (bp, DECL_RESTRICTED_P (expr), 1);
433 /* Pack all the non-pointer fields of the TS_DECL_WRTL structure
434 of expression EXPR into bitpack BP. */
437 pack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
439 bp_pack_value (bp, DECL_REGISTER (expr), 1);
443 /* Pack all the non-pointer fields of the TS_DECL_WITH_VIS structure
444 of expression EXPR into bitpack BP. */
447 pack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
449 bp_pack_value (bp, DECL_DEFER_OUTPUT (expr), 1);
450 bp_pack_value (bp, DECL_COMMON (expr), 1);
451 bp_pack_value (bp, DECL_DLLIMPORT_P (expr), 1);
452 bp_pack_value (bp, DECL_WEAK (expr), 1);
453 bp_pack_value (bp, DECL_SEEN_IN_BIND_EXPR_P (expr), 1);
454 bp_pack_value (bp, DECL_COMDAT (expr), 1);
455 bp_pack_value (bp, DECL_VISIBILITY (expr), 2);
456 bp_pack_value (bp, DECL_VISIBILITY_SPECIFIED (expr), 1);
458 if (TREE_CODE (expr) == VAR_DECL)
460 bp_pack_value (bp, DECL_HARD_REGISTER (expr), 1);
461 bp_pack_value (bp, DECL_IN_TEXT_SECTION (expr), 1);
462 bp_pack_value (bp, DECL_IN_CONSTANT_POOL (expr), 1);
463 bp_pack_value (bp, DECL_TLS_MODEL (expr), 3);
466 if (VAR_OR_FUNCTION_DECL_P (expr))
467 bp_pack_value (bp, DECL_INIT_PRIORITY (expr), HOST_BITS_PER_SHORT);
471 /* Pack all the non-pointer fields of the TS_FUNCTION_DECL structure
472 of expression EXPR into bitpack BP. */
475 pack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
477 /* For normal/md builtins we only write the class and code, so they
478 should never be handled here. */
479 gcc_assert (!lto_stream_as_builtin_p (expr));
481 bp_pack_value (bp, DECL_FUNCTION_CODE (expr), 11);
482 bp_pack_value (bp, DECL_BUILT_IN_CLASS (expr), 2);
483 bp_pack_value (bp, DECL_STATIC_CONSTRUCTOR (expr), 1);
484 bp_pack_value (bp, DECL_STATIC_DESTRUCTOR (expr), 1);
485 bp_pack_value (bp, DECL_UNINLINABLE (expr), 1);
486 bp_pack_value (bp, DECL_POSSIBLY_INLINED (expr), 1);
487 bp_pack_value (bp, DECL_IS_NOVOPS (expr), 1);
488 bp_pack_value (bp, DECL_IS_RETURNS_TWICE (expr), 1);
489 bp_pack_value (bp, DECL_IS_MALLOC (expr), 1);
490 bp_pack_value (bp, DECL_IS_OPERATOR_NEW (expr), 1);
491 bp_pack_value (bp, DECL_DECLARED_INLINE_P (expr), 1);
492 bp_pack_value (bp, DECL_STATIC_CHAIN (expr), 1);
493 bp_pack_value (bp, DECL_NO_INLINE_WARNING_P (expr), 1);
494 bp_pack_value (bp, DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr), 1);
495 bp_pack_value (bp, DECL_NO_LIMIT_STACK (expr), 1);
496 bp_pack_value (bp, DECL_DISREGARD_INLINE_LIMITS (expr), 1);
497 bp_pack_value (bp, DECL_PURE_P (expr), 1);
498 bp_pack_value (bp, DECL_LOOPING_CONST_OR_PURE_P (expr), 1);
502 /* Pack all the non-pointer fields of the TS_TYPE structure
503 of expression EXPR into bitpack BP. */
506 pack_ts_type_value_fields (struct bitpack_d *bp, tree expr)
508 bp_pack_value (bp, TYPE_PRECISION (expr), 10);
509 bp_pack_value (bp, TYPE_MODE (expr), 8);
510 bp_pack_value (bp, TYPE_STRING_FLAG (expr), 1);
511 bp_pack_value (bp, TYPE_NO_FORCE_BLK (expr), 1);
512 bp_pack_value (bp, TYPE_NEEDS_CONSTRUCTING (expr), 1);
513 if (RECORD_OR_UNION_TYPE_P (expr))
514 bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1);
515 bp_pack_value (bp, TYPE_PACKED (expr), 1);
516 bp_pack_value (bp, TYPE_RESTRICT (expr), 1);
517 bp_pack_value (bp, TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr), 2);
518 bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1);
519 bp_pack_value (bp, TYPE_READONLY (expr), 1);
520 bp_pack_value (bp, TYPE_ALIGN (expr), HOST_BITS_PER_INT);
521 bp_pack_value (bp, TYPE_ALIAS_SET (expr) == 0 ? 0 : -1, HOST_BITS_PER_INT);
525 /* Pack all the non-pointer fields of the TS_BLOCK structure
526 of expression EXPR into bitpack BP. */
529 pack_ts_block_value_fields (struct bitpack_d *bp, tree expr)
531 bp_pack_value (bp, BLOCK_ABSTRACT (expr), 1);
532 bp_pack_value (bp, BLOCK_NUMBER (expr), 31);
535 /* Pack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL structure
536 of expression EXPR into bitpack BP. */
539 pack_ts_translation_unit_decl_value_fields (struct bitpack_d *bp ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED)
543 /* Pack all the non-pointer fields in EXPR into a bit pack. */
546 pack_value_fields (struct bitpack_d *bp, tree expr)
550 code = TREE_CODE (expr);
552 /* Note that all these functions are highly sensitive to changes in
553 the types and sizes of each of the fields being packed. */
554 pack_ts_base_value_fields (bp, expr);
556 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
557 pack_ts_real_cst_value_fields (bp, expr);
559 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
560 pack_ts_fixed_cst_value_fields (bp, expr);
562 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
563 pack_ts_decl_common_value_fields (bp, expr);
565 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
566 pack_ts_decl_wrtl_value_fields (bp, expr);
568 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
569 pack_ts_decl_with_vis_value_fields (bp, expr);
571 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
572 pack_ts_function_decl_value_fields (bp, expr);
574 if (CODE_CONTAINS_STRUCT (code, TS_TYPE))
575 pack_ts_type_value_fields (bp, expr);
577 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
578 pack_ts_block_value_fields (bp, expr);
580 if (CODE_CONTAINS_STRUCT (code, TS_SSA_NAME))
582 /* We only stream the version number of SSA names. */
586 if (CODE_CONTAINS_STRUCT (code, TS_STATEMENT_LIST))
588 /* This is only used by GENERIC. */
592 if (CODE_CONTAINS_STRUCT (code, TS_OMP_CLAUSE))
594 /* This is only used by High GIMPLE. */
598 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
599 pack_ts_translation_unit_decl_value_fields (bp, expr);
603 /* Emit location LOC to output block OB. */
606 lto_output_location (struct output_block *ob, location_t loc)
608 expanded_location xloc;
610 if (loc == UNKNOWN_LOCATION)
612 output_string (ob, ob->main_stream, NULL);
616 xloc = expand_location (loc);
618 output_string (ob, ob->main_stream, xloc.file);
619 output_sleb128 (ob, xloc.line);
620 output_sleb128 (ob, xloc.column);
621 output_sleb128 (ob, xloc.sysp);
623 ob->current_file = xloc.file;
624 ob->current_line = xloc.line;
625 ob->current_col = xloc.column;
629 /* Return true if tree node T is written to various tables. For these
630 nodes, we sometimes want to write their phyiscal representation
631 (via lto_output_tree), and sometimes we need to emit an index
632 reference into a table (via lto_output_tree_ref). */
635 tree_is_indexable (tree t)
637 if (TREE_CODE (t) == PARM_DECL)
639 else if (TREE_CODE (t) == VAR_DECL && decl_function_context (t)
643 return (TYPE_P (t) || DECL_P (t) || TREE_CODE (t) == SSA_NAME);
647 /* If EXPR is an indexable tree node, output a reference to it to
648 output block OB. Otherwise, output the physical representation of
652 lto_output_tree_ref (struct output_block *ob, tree expr)
656 if (expr == NULL_TREE)
662 if (!tree_is_indexable (expr))
664 /* Even though we are emitting the physical representation of
665 EXPR, its leaves must be emitted as references. */
666 lto_output_tree (ob, expr, true);
672 output_type_ref (ob, expr);
676 code = TREE_CODE (expr);
680 output_record_start (ob, LTO_ssa_name_ref);
681 output_uleb128 (ob, SSA_NAME_VERSION (expr));
685 output_record_start (ob, LTO_field_decl_ref);
686 lto_output_field_decl_index (ob->decl_state, ob->main_stream, expr);
690 output_record_start (ob, LTO_function_decl_ref);
691 lto_output_fn_decl_index (ob->decl_state, ob->main_stream, expr);
695 case DEBUG_EXPR_DECL:
696 gcc_assert (decl_function_context (expr) == NULL
697 || TREE_STATIC (expr));
698 output_record_start (ob, LTO_global_decl_ref);
699 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
703 output_record_start (ob, LTO_const_decl_ref);
704 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
708 gcc_assert (decl_function_context (expr) == NULL);
709 output_record_start (ob, LTO_imported_decl_ref);
710 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
714 output_record_start (ob, LTO_type_decl_ref);
715 lto_output_type_decl_index (ob->decl_state, ob->main_stream, expr);
719 output_record_start (ob, LTO_namespace_decl_ref);
720 lto_output_namespace_decl_index (ob->decl_state, ob->main_stream, expr);
724 output_record_start (ob, LTO_label_decl_ref);
725 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
729 output_record_start (ob, LTO_result_decl_ref);
730 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
733 case TRANSLATION_UNIT_DECL:
734 output_record_start (ob, LTO_translation_unit_decl_ref);
735 lto_output_var_decl_index (ob->decl_state, ob->main_stream, expr);
739 /* No other node is indexable, so it should have been handled
740 by lto_output_tree. */
746 /* If REF_P is true, emit a reference to EXPR in output block OB,
747 otherwise emit the physical representation of EXPR in OB. */
750 lto_output_tree_or_ref (struct output_block *ob, tree expr, bool ref_p)
753 lto_output_tree_ref (ob, expr);
755 lto_output_tree (ob, expr, false);
759 /* Emit the chain of tree nodes starting at T. OB is the output block
760 to write to. REF_P is true if chain elements should be emitted
764 lto_output_chain (struct output_block *ob, tree t, bool ref_p)
768 count = list_length (t);
769 output_sleb128 (ob, count);
770 for (i = 0; i < count; i++)
774 /* Clear TREE_CHAIN to avoid blindly recursing into the rest
776 saved_chain = TREE_CHAIN (t);
777 TREE_CHAIN (t) = NULL_TREE;
779 lto_output_tree_or_ref (ob, t, ref_p);
781 TREE_CHAIN (t) = saved_chain;
787 /* Write all pointer fields in the TS_COMMON structure of EXPR to output
788 block OB. If REF_P is true, write a reference to EXPR's pointer
792 lto_output_ts_common_tree_pointers (struct output_block *ob, tree expr,
795 if (TREE_CODE (expr) != IDENTIFIER_NODE)
796 lto_output_tree_or_ref (ob, TREE_TYPE (expr), ref_p);
800 /* Write all pointer fields in the TS_VECTOR structure of EXPR to output
801 block OB. If REF_P is true, write a reference to EXPR's pointer
805 lto_output_ts_vector_tree_pointers (struct output_block *ob, tree expr,
808 lto_output_chain (ob, TREE_VECTOR_CST_ELTS (expr), ref_p);
812 /* Write all pointer fields in the TS_COMPLEX structure of EXPR to output
813 block OB. If REF_P is true, write a reference to EXPR's pointer
817 lto_output_ts_complex_tree_pointers (struct output_block *ob, tree expr,
820 lto_output_tree_or_ref (ob, TREE_REALPART (expr), ref_p);
821 lto_output_tree_or_ref (ob, TREE_IMAGPART (expr), ref_p);
825 /* Write all pointer fields in the TS_DECL_MINIMAL structure of EXPR
826 to output block OB. If REF_P is true, write a reference to EXPR's
830 lto_output_ts_decl_minimal_tree_pointers (struct output_block *ob, tree expr,
833 lto_output_tree_or_ref (ob, DECL_NAME (expr), ref_p);
834 lto_output_tree_or_ref (ob, DECL_CONTEXT (expr), ref_p);
835 lto_output_location (ob, DECL_SOURCE_LOCATION (expr));
839 /* Write all pointer fields in the TS_DECL_COMMON structure of EXPR to
840 output block OB. If REF_P is true, write a reference to EXPR's
844 lto_output_ts_decl_common_tree_pointers (struct output_block *ob, tree expr,
847 lto_output_tree_or_ref (ob, DECL_SIZE (expr), ref_p);
848 lto_output_tree_or_ref (ob, DECL_SIZE_UNIT (expr), ref_p);
850 if (TREE_CODE (expr) != FUNCTION_DECL)
852 tree initial = DECL_INITIAL (expr);
853 if (TREE_CODE (expr) == VAR_DECL
854 && (TREE_STATIC (expr) || DECL_EXTERNAL (expr))
857 lto_varpool_encoder_t varpool_encoder = ob->decl_state->varpool_node_encoder;
858 struct varpool_node *vnode = varpool_get_node (expr);
860 initial = error_mark_node;
861 else if (!lto_varpool_encoder_encode_initializer_p (varpool_encoder,
866 lto_output_tree_or_ref (ob, initial, ref_p);
869 lto_output_tree_or_ref (ob, DECL_ATTRIBUTES (expr), ref_p);
870 lto_output_tree_or_ref (ob, DECL_ABSTRACT_ORIGIN (expr), ref_p);
872 if (TREE_CODE (expr) == PARM_DECL)
873 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
875 if ((TREE_CODE (expr) == VAR_DECL
876 || TREE_CODE (expr) == PARM_DECL)
877 && DECL_HAS_VALUE_EXPR_P (expr))
878 lto_output_tree_or_ref (ob, DECL_VALUE_EXPR (expr), ref_p);
880 if (TREE_CODE (expr) == VAR_DECL)
881 lto_output_tree_or_ref (ob, DECL_DEBUG_EXPR (expr), ref_p);
885 /* Write all pointer fields in the TS_DECL_NON_COMMON structure of
886 EXPR to output block OB. If REF_P is true, write a reference to EXPR's
890 lto_output_ts_decl_non_common_tree_pointers (struct output_block *ob,
891 tree expr, bool ref_p)
893 if (TREE_CODE (expr) == FUNCTION_DECL)
895 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
896 At this point, it should not exist. Either because it was
897 converted to gimple or because DECL didn't have a GENERIC
898 representation in this TU. */
899 gcc_assert (DECL_SAVED_TREE (expr) == NULL_TREE);
900 lto_output_tree_or_ref (ob, DECL_ARGUMENTS (expr), ref_p);
901 lto_output_tree_or_ref (ob, DECL_RESULT (expr), ref_p);
903 lto_output_tree_or_ref (ob, DECL_VINDEX (expr), ref_p);
907 /* Write all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
908 to output block OB. If REF_P is true, write a reference to EXPR's
912 lto_output_ts_decl_with_vis_tree_pointers (struct output_block *ob, tree expr,
915 /* Make sure we don't inadvertently set the assembler name. */
916 if (DECL_ASSEMBLER_NAME_SET_P (expr))
917 lto_output_tree_or_ref (ob, DECL_ASSEMBLER_NAME (expr), ref_p);
921 lto_output_tree_or_ref (ob, DECL_SECTION_NAME (expr), ref_p);
922 lto_output_tree_or_ref (ob, DECL_COMDAT_GROUP (expr), ref_p);
926 /* Write all pointer fields in the TS_FIELD_DECL structure of EXPR to
927 output block OB. If REF_P is true, write a reference to EXPR's
931 lto_output_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
934 lto_output_tree_or_ref (ob, DECL_FIELD_OFFSET (expr), ref_p);
935 lto_output_tree_or_ref (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
936 lto_output_tree_or_ref (ob, DECL_QUALIFIER (expr), ref_p);
937 lto_output_tree_or_ref (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
938 lto_output_tree_or_ref (ob, DECL_FCONTEXT (expr), ref_p);
939 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
943 /* Write all pointer fields in the TS_FUNCTION_DECL structure of EXPR
944 to output block OB. If REF_P is true, write a reference to EXPR's
948 lto_output_ts_function_decl_tree_pointers (struct output_block *ob, tree expr,
951 /* DECL_STRUCT_FUNCTION is handled by lto_output_function. FIXME lto,
952 maybe it should be handled here? */
953 lto_output_tree_or_ref (ob, DECL_FUNCTION_PERSONALITY (expr), ref_p);
954 lto_output_tree_or_ref (ob, DECL_FUNCTION_SPECIFIC_TARGET (expr), ref_p);
955 lto_output_tree_or_ref (ob, DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr),
960 /* Write all pointer fields in the TS_TYPE structure of EXPR to output
961 block OB. If REF_P is true, write a reference to EXPR's pointer
965 lto_output_ts_type_tree_pointers (struct output_block *ob, tree expr,
968 if (TREE_CODE (expr) == ENUMERAL_TYPE)
969 lto_output_tree_or_ref (ob, TYPE_VALUES (expr), ref_p);
970 else if (TREE_CODE (expr) == ARRAY_TYPE)
971 lto_output_tree_or_ref (ob, TYPE_DOMAIN (expr), ref_p);
972 else if (RECORD_OR_UNION_TYPE_P (expr))
973 lto_output_tree_or_ref (ob, TYPE_FIELDS (expr), ref_p);
974 else if (TREE_CODE (expr) == FUNCTION_TYPE
975 || TREE_CODE (expr) == METHOD_TYPE)
976 lto_output_tree_or_ref (ob, TYPE_ARG_TYPES (expr), ref_p);
978 lto_output_tree_or_ref (ob, TYPE_SIZE (expr), ref_p);
979 lto_output_tree_or_ref (ob, TYPE_SIZE_UNIT (expr), ref_p);
980 lto_output_tree_or_ref (ob, TYPE_ATTRIBUTES (expr), ref_p);
981 lto_output_tree_or_ref (ob, TYPE_NAME (expr), ref_p);
982 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO nor
983 TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. */
984 if (!POINTER_TYPE_P (expr))
985 lto_output_tree_or_ref (ob, TYPE_MINVAL (expr), ref_p);
986 lto_output_tree_or_ref (ob, TYPE_MAXVAL (expr), ref_p);
987 lto_output_tree_or_ref (ob, TYPE_MAIN_VARIANT (expr), ref_p);
988 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
990 if (RECORD_OR_UNION_TYPE_P (expr))
991 lto_output_tree_or_ref (ob, TYPE_BINFO (expr), ref_p);
992 lto_output_tree_or_ref (ob, TYPE_CONTEXT (expr), ref_p);
993 /* TYPE_CANONICAL is re-computed during type merging, so no need
994 to stream it here. */
995 lto_output_tree_or_ref (ob, TYPE_STUB_DECL (expr), ref_p);
999 /* Write all pointer fields in the TS_LIST structure of EXPR to output
1000 block OB. If REF_P is true, write a reference to EXPR's pointer
1004 lto_output_ts_list_tree_pointers (struct output_block *ob, tree expr,
1007 lto_output_tree_or_ref (ob, TREE_PURPOSE (expr), ref_p);
1008 lto_output_tree_or_ref (ob, TREE_VALUE (expr), ref_p);
1009 lto_output_chain (ob, TREE_CHAIN (expr), ref_p);
1013 /* Write all pointer fields in the TS_VEC structure of EXPR to output
1014 block OB. If REF_P is true, write a reference to EXPR's pointer
1018 lto_output_ts_vec_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1022 /* Note that the number of slots for EXPR has already been emitted
1023 in EXPR's header (see lto_output_tree_header). */
1024 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
1025 lto_output_tree_or_ref (ob, TREE_VEC_ELT (expr, i), ref_p);
1029 /* Write all pointer fields in the TS_EXP structure of EXPR to output
1030 block OB. If REF_P is true, write a reference to EXPR's pointer
1034 lto_output_ts_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1038 output_sleb128 (ob, TREE_OPERAND_LENGTH (expr));
1039 for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
1040 lto_output_tree_or_ref (ob, TREE_OPERAND (expr, i), ref_p);
1041 lto_output_location (ob, EXPR_LOCATION (expr));
1042 lto_output_tree_or_ref (ob, TREE_BLOCK (expr), ref_p);
1046 /* Write all pointer fields in the TS_BLOCK structure of EXPR to output
1047 block OB. If REF_P is true, write a reference to EXPR's pointer
1051 lto_output_ts_block_tree_pointers (struct output_block *ob, tree expr,
1057 lto_output_location (ob, BLOCK_SOURCE_LOCATION (expr));
1058 /* We do not stream BLOCK_VARS but lazily construct it when reading
1061 output_uleb128 (ob, VEC_length (tree, BLOCK_NONLOCALIZED_VARS (expr)));
1062 FOR_EACH_VEC_ELT (tree, BLOCK_NONLOCALIZED_VARS (expr), i, t)
1064 gcc_assert (DECL_CONTEXT (t) != expr);
1065 lto_output_tree_or_ref (ob, t, ref_p);
1068 lto_output_tree_or_ref (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
1069 lto_output_tree_or_ref (ob, BLOCK_ABSTRACT_ORIGIN (expr), ref_p);
1070 lto_output_tree_or_ref (ob, BLOCK_FRAGMENT_ORIGIN (expr), ref_p);
1071 lto_output_tree_or_ref (ob, BLOCK_FRAGMENT_CHAIN (expr), ref_p);
1072 /* Do not output BLOCK_SUBBLOCKS. Instead on streaming-in this
1073 list is re-constructed from BLOCK_SUPERCONTEXT. */
1077 /* Write all pointer fields in the TS_BINFO structure of EXPR to output
1078 block OB. If REF_P is true, write a reference to EXPR's pointer
1082 lto_output_ts_binfo_tree_pointers (struct output_block *ob, tree expr,
1088 /* Note that the number of BINFO slots has already been emitted in
1089 EXPR's header (see lto_output_tree_header) because this length
1090 is needed to build the empty BINFO node on the reader side. */
1091 FOR_EACH_VEC_ELT (tree, BINFO_BASE_BINFOS (expr), i, t)
1092 lto_output_tree_or_ref (ob, t, ref_p);
1095 lto_output_tree_or_ref (ob, BINFO_OFFSET (expr), ref_p);
1096 lto_output_tree_or_ref (ob, BINFO_VTABLE (expr), ref_p);
1097 lto_output_tree_or_ref (ob, BINFO_VIRTUALS (expr), ref_p);
1098 lto_output_tree_or_ref (ob, BINFO_VPTR_FIELD (expr), ref_p);
1100 output_uleb128 (ob, VEC_length (tree, BINFO_BASE_ACCESSES (expr)));
1101 FOR_EACH_VEC_ELT (tree, BINFO_BASE_ACCESSES (expr), i, t)
1102 lto_output_tree_or_ref (ob, t, ref_p);
1104 lto_output_tree_or_ref (ob, BINFO_INHERITANCE_CHAIN (expr), ref_p);
1105 lto_output_tree_or_ref (ob, BINFO_SUBVTT_INDEX (expr), ref_p);
1106 lto_output_tree_or_ref (ob, BINFO_VPTR_INDEX (expr), ref_p);
1110 /* Write all pointer fields in the TS_CONSTRUCTOR structure of EXPR to
1111 output block OB. If REF_P is true, write a reference to EXPR's
1115 lto_output_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
1121 output_uleb128 (ob, CONSTRUCTOR_NELTS (expr));
1122 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (expr), i, index, value)
1124 lto_output_tree_or_ref (ob, index, ref_p);
1125 lto_output_tree_or_ref (ob, value, ref_p);
1129 /* Write a TS_TARGET_OPTION tree in EXPR to OB. */
1132 lto_output_ts_target_option (struct output_block *ob, tree expr)
1134 struct cl_target_option *t = TREE_TARGET_OPTION (expr);
1135 struct bitpack_d bp;
1138 /* The cl_target_option is target specific and generated by the options
1139 awk script, so we just recreate a byte-by-byte copy here. */
1141 bp = bitpack_create (ob->main_stream);
1142 len = sizeof (struct cl_target_option);
1143 for (i = 0; i < len; i++)
1144 bp_pack_value (&bp, ((unsigned char *)t)[i], 8);
1145 /* Catch struct size mismatches between reader and writer. */
1146 bp_pack_value (&bp, 0x12345678, 32);
1147 lto_output_bitpack (&bp);
1150 /* Write a TS_TRANSLATION_UNIT_DECL tree in EXPR to OB. */
1153 lto_output_ts_translation_unit_decl_tree_pointers (struct output_block *ob,
1156 output_string (ob, ob->main_stream, TRANSLATION_UNIT_LANGUAGE (expr));
1159 /* Helper for lto_output_tree. Write all pointer fields in EXPR to output
1160 block OB. If REF_P is true, the leaves of EXPR are emitted as
1164 lto_output_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
1166 enum tree_code code;
1168 code = TREE_CODE (expr);
1170 if (CODE_CONTAINS_STRUCT (code, TS_COMMON))
1171 lto_output_ts_common_tree_pointers (ob, expr, ref_p);
1173 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1174 lto_output_ts_vector_tree_pointers (ob, expr, ref_p);
1176 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1177 lto_output_ts_complex_tree_pointers (ob, expr, ref_p);
1179 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1180 lto_output_ts_decl_minimal_tree_pointers (ob, expr, ref_p);
1182 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1183 lto_output_ts_decl_common_tree_pointers (ob, expr, ref_p);
1185 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1186 lto_output_ts_decl_non_common_tree_pointers (ob, expr, ref_p);
1188 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1189 lto_output_ts_decl_with_vis_tree_pointers (ob, expr, ref_p);
1191 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1192 lto_output_ts_field_decl_tree_pointers (ob, expr, ref_p);
1194 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1195 lto_output_ts_function_decl_tree_pointers (ob, expr, ref_p);
1197 if (CODE_CONTAINS_STRUCT (code, TS_TYPE))
1198 lto_output_ts_type_tree_pointers (ob, expr, ref_p);
1200 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1201 lto_output_ts_list_tree_pointers (ob, expr, ref_p);
1203 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1204 lto_output_ts_vec_tree_pointers (ob, expr, ref_p);
1206 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1207 lto_output_ts_exp_tree_pointers (ob, expr, ref_p);
1209 if (CODE_CONTAINS_STRUCT (code, TS_SSA_NAME))
1211 /* We only stream the version number of SSA names. */
1215 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1216 lto_output_ts_block_tree_pointers (ob, expr, ref_p);
1218 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1219 lto_output_ts_binfo_tree_pointers (ob, expr, ref_p);
1221 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1222 lto_output_ts_constructor_tree_pointers (ob, expr, ref_p);
1224 if (CODE_CONTAINS_STRUCT (code, TS_STATEMENT_LIST))
1226 /* This should only appear in GENERIC. */
1230 if (CODE_CONTAINS_STRUCT (code, TS_OMP_CLAUSE))
1232 /* This should only appear in High GIMPLE. */
1236 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
1237 sorry ("gimple bytecode streams do not support the optimization attribute");
1239 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
1240 lto_output_ts_target_option (ob, expr);
1242 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
1243 lto_output_ts_translation_unit_decl_tree_pointers (ob, expr);
1247 /* Emit header information for tree EXPR to output block OB. The header
1248 contains everything needed to instantiate an empty skeleton for
1249 EXPR on the reading side. IX is the index into the streamer cache
1250 where EXPR is stored. REF_P is as in lto_output_tree. */
1253 lto_output_tree_header (struct output_block *ob, tree expr, int ix)
1256 enum tree_code code;
1258 /* We should not see any non-GIMPLE tree nodes here. */
1259 code = TREE_CODE (expr);
1260 if (!lto_is_streamable (expr))
1261 internal_error ("tree code %qs is not supported in gimple streams",
1262 tree_code_name[code]);
1264 /* The header of a tree node consists of its tag, the size of
1265 the node, and any other information needed to instantiate
1266 EXPR on the reading side (such as the number of slots in
1267 variable sized nodes). */
1268 tag = lto_tree_code_to_tag (code);
1269 output_record_start (ob, tag);
1270 output_sleb128 (ob, ix);
1272 /* The following will cause bootstrap miscomparisons. Enable with care. */
1273 #ifdef LTO_STREAMER_DEBUG
1274 /* This is used mainly for debugging purposes. When the reader
1275 and the writer do not agree on a streamed node, the pointer
1276 value for EXPR can be used to track down the differences in
1278 gcc_assert ((HOST_WIDEST_INT) (intptr_t) expr == (intptr_t) expr);
1279 output_sleb128 (ob, (HOST_WIDEST_INT) (intptr_t) expr);
1282 /* The text in strings and identifiers are completely emitted in
1284 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
1285 output_string_cst (ob, ob->main_stream, expr);
1286 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
1287 output_identifier (ob, ob->main_stream, expr);
1288 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1289 output_sleb128 (ob, TREE_VEC_LENGTH (expr));
1290 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1291 output_uleb128 (ob, BINFO_N_BASE_BINFOS (expr));
1295 /* Write the code and class of builtin EXPR to output block OB. IX is
1296 the index into the streamer cache where EXPR is stored.*/
1299 lto_output_builtin_tree (struct output_block *ob, tree expr, int ix)
1301 gcc_assert (lto_stream_as_builtin_p (expr));
1303 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD
1304 && !targetm.builtin_decl)
1305 sorry ("gimple bytecode streams do not support machine specific builtin "
1306 "functions on this target");
1308 output_record_start (ob, LTO_builtin_decl);
1309 output_uleb128 (ob, DECL_BUILT_IN_CLASS (expr));
1310 output_uleb128 (ob, DECL_FUNCTION_CODE (expr));
1311 output_sleb128 (ob, ix);
1313 if (DECL_ASSEMBLER_NAME_SET_P (expr))
1315 /* When the assembler name of a builtin gets a user name,
1316 the new name is always prefixed with '*' by
1317 set_builtin_user_assembler_name. So, to prevent the
1318 reader side from adding a second '*', we omit it here. */
1319 const char *str = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (expr));
1320 if (strlen (str) > 1 && str[0] == '*')
1321 output_string (ob, ob->main_stream, &str[1]);
1323 output_string (ob, ob->main_stream, NULL);
1326 output_string (ob, ob->main_stream, NULL);
1330 /* Write a physical representation of tree node EXPR to output block
1331 OB. If REF_P is true, the leaves of EXPR are emitted as references
1332 via lto_output_tree_ref. IX is the index into the streamer cache
1333 where EXPR is stored. */
1336 lto_write_tree (struct output_block *ob, tree expr, bool ref_p, int ix)
1338 struct bitpack_d bp;
1340 /* Write the header, containing everything needed to materialize
1341 EXPR on the reading side. */
1342 lto_output_tree_header (ob, expr, ix);
1344 /* Pack all the non-pointer fields in EXPR into a bitpack and write
1345 the resulting bitpack. */
1346 bp = bitpack_create (ob->main_stream);
1347 pack_value_fields (&bp, expr);
1348 lto_output_bitpack (&bp);
1350 /* Write all the pointer fields in EXPR. */
1351 lto_output_tree_pointers (ob, expr, ref_p);
1353 /* Mark the end of EXPR. */
1358 /* Emit the integer constant CST to output block OB. If REF_P is true,
1359 CST's type will be emitted as a reference. */
1362 lto_output_integer_cst (struct output_block *ob, tree cst, bool ref_p)
1364 output_record_start (ob, lto_tree_code_to_tag (INTEGER_CST));
1365 lto_output_tree_or_ref (ob, TREE_TYPE (cst), ref_p);
1366 lto_output_1_stream (ob->main_stream, TREE_OVERFLOW_P (cst));
1367 output_uleb128 (ob, TREE_INT_CST_LOW (cst));
1368 output_uleb128 (ob, TREE_INT_CST_HIGH (cst));
1372 /* Emit the physical representation of tree node EXPR to output block
1373 OB. If REF_P is true, the leaves of EXPR are emitted as references
1374 via lto_output_tree_ref. */
1377 lto_output_tree (struct output_block *ob, tree expr, bool ref_p)
1383 if (expr == NULL_TREE)
1389 /* INTEGER_CST nodes are special because they need their original type
1390 to be materialized by the reader (to implement TYPE_CACHED_VALUES). */
1391 if (TREE_CODE (expr) == INTEGER_CST)
1393 lto_output_integer_cst (ob, expr, ref_p);
1397 /* Determine the offset in the stream where EXPR will be written.
1398 This is used when emitting pickle references so the reader knows
1399 where to reconstruct the pickled object from. This allows
1400 circular and forward references within the same stream. */
1401 offset = ob->main_stream->total_size;
1403 existed_p = lto_streamer_cache_insert (ob->writer_cache, expr, &ix, &offset);
1406 /* If a node has already been streamed out, make sure that
1407 we don't write it more than once. Otherwise, the reader
1408 will instantiate two different nodes for the same object. */
1409 output_record_start (ob, LTO_tree_pickle_reference);
1410 output_sleb128 (ob, ix);
1411 output_uleb128 (ob, lto_tree_code_to_tag (TREE_CODE (expr)));
1412 output_uleb128 (ob, offset);
1414 else if (lto_stream_as_builtin_p (expr))
1416 /* MD and NORMAL builtins do not need to be written out
1417 completely as they are always instantiated by the
1418 compiler on startup. The only builtins that need to
1419 be written out are BUILT_IN_FRONTEND. For all other
1420 builtins, we simply write the class and code. */
1421 lto_output_builtin_tree (ob, expr, ix);
1425 /* This is the first time we see EXPR, write its fields
1427 lto_write_tree (ob, expr, ref_p, ix);
1432 /* Output to OB a list of try/catch handlers starting with FIRST. */
1435 output_eh_try_list (struct output_block *ob, eh_catch first)
1439 for (n = first; n; n = n->next_catch)
1441 output_record_start (ob, LTO_eh_catch);
1442 lto_output_tree_ref (ob, n->type_list);
1443 lto_output_tree_ref (ob, n->filter_list);
1444 lto_output_tree_ref (ob, n->label);
1451 /* Output EH region R in function FN to OB. CURR_RN is the slot index
1452 that is being emitted in FN->EH->REGION_ARRAY. This is used to
1453 detect EH region sharing. */
1456 output_eh_region (struct output_block *ob, eh_region r)
1466 if (r->type == ERT_CLEANUP)
1467 tag = LTO_ert_cleanup;
1468 else if (r->type == ERT_TRY)
1470 else if (r->type == ERT_ALLOWED_EXCEPTIONS)
1471 tag = LTO_ert_allowed_exceptions;
1472 else if (r->type == ERT_MUST_NOT_THROW)
1473 tag = LTO_ert_must_not_throw;
1477 output_record_start (ob, tag);
1478 output_sleb128 (ob, r->index);
1481 output_sleb128 (ob, r->outer->index);
1486 output_sleb128 (ob, r->inner->index);
1491 output_sleb128 (ob, r->next_peer->index);
1495 if (r->type == ERT_TRY)
1497 output_eh_try_list (ob, r->u.eh_try.first_catch);
1499 else if (r->type == ERT_ALLOWED_EXCEPTIONS)
1501 lto_output_tree_ref (ob, r->u.allowed.type_list);
1502 lto_output_tree_ref (ob, r->u.allowed.label);
1503 output_uleb128 (ob, r->u.allowed.filter);
1505 else if (r->type == ERT_MUST_NOT_THROW)
1507 lto_output_tree_ref (ob, r->u.must_not_throw.failure_decl);
1508 lto_output_location (ob, r->u.must_not_throw.failure_loc);
1511 if (r->landing_pads)
1512 output_sleb128 (ob, r->landing_pads->index);
1518 /* Output landing pad LP to OB. */
1521 output_eh_lp (struct output_block *ob, eh_landing_pad lp)
1529 output_record_start (ob, LTO_eh_landing_pad);
1530 output_sleb128 (ob, lp->index);
1532 output_sleb128 (ob, lp->next_lp->index);
1537 output_sleb128 (ob, lp->region->index);
1541 lto_output_tree_ref (ob, lp->post_landing_pad);
1545 /* Output the existing eh_table to OB. */
1548 output_eh_regions (struct output_block *ob, struct function *fn)
1550 if (fn->eh && fn->eh->region_tree)
1557 output_record_start (ob, LTO_eh_table);
1559 /* Emit the index of the root of the EH region tree. */
1560 output_sleb128 (ob, fn->eh->region_tree->index);
1562 /* Emit all the EH regions in the region array. */
1563 output_sleb128 (ob, VEC_length (eh_region, fn->eh->region_array));
1564 FOR_EACH_VEC_ELT (eh_region, fn->eh->region_array, i, eh)
1565 output_eh_region (ob, eh);
1567 /* Emit all landing pads. */
1568 output_sleb128 (ob, VEC_length (eh_landing_pad, fn->eh->lp_array));
1569 FOR_EACH_VEC_ELT (eh_landing_pad, fn->eh->lp_array, i, lp)
1570 output_eh_lp (ob, lp);
1572 /* Emit all the runtime type data. */
1573 output_sleb128 (ob, VEC_length (tree, fn->eh->ttype_data));
1574 FOR_EACH_VEC_ELT (tree, fn->eh->ttype_data, i, ttype)
1575 lto_output_tree_ref (ob, ttype);
1577 /* Emit the table of action chains. */
1578 if (targetm.arm_eabi_unwinder)
1581 output_sleb128 (ob, VEC_length (tree, fn->eh->ehspec_data.arm_eabi));
1582 FOR_EACH_VEC_ELT (tree, fn->eh->ehspec_data.arm_eabi, i, t)
1583 lto_output_tree_ref (ob, t);
1588 output_sleb128 (ob, VEC_length (uchar, fn->eh->ehspec_data.other));
1589 FOR_EACH_VEC_ELT (uchar, fn->eh->ehspec_data.other, i, c)
1590 lto_output_1_stream (ob->main_stream, c);
1594 /* The 0 either terminates the record or indicates that there are no
1595 eh_records at all. */
1600 /* Output all of the active ssa names to the ssa_names stream. */
1603 output_ssa_names (struct output_block *ob, struct function *fn)
1605 unsigned int i, len;
1607 len = VEC_length (tree, SSANAMES (fn));
1608 output_uleb128 (ob, len);
1610 for (i = 1; i < len; i++)
1612 tree ptr = VEC_index (tree, SSANAMES (fn), i);
1614 if (ptr == NULL_TREE
1615 || SSA_NAME_IN_FREE_LIST (ptr)
1616 || !is_gimple_reg (ptr))
1619 output_uleb128 (ob, i);
1620 lto_output_1_stream (ob->main_stream, SSA_NAME_IS_DEFAULT_DEF (ptr));
1621 lto_output_tree_ref (ob, SSA_NAME_VAR (ptr));
1628 /* Output the cfg. */
1631 output_cfg (struct output_block *ob, struct function *fn)
1633 struct lto_output_stream *tmp_stream = ob->main_stream;
1636 ob->main_stream = ob->cfg_stream;
1638 output_uleb128 (ob, profile_status_for_function (fn));
1640 /* Output the number of the highest basic block. */
1641 output_uleb128 (ob, last_basic_block_for_function (fn));
1643 FOR_ALL_BB_FN (bb, fn)
1648 output_sleb128 (ob, bb->index);
1650 /* Output the successors and the edge flags. */
1651 output_uleb128 (ob, EDGE_COUNT (bb->succs));
1652 FOR_EACH_EDGE (e, ei, bb->succs)
1654 output_uleb128 (ob, e->dest->index);
1655 output_sleb128 (ob, e->probability);
1656 output_sleb128 (ob, e->count);
1657 output_uleb128 (ob, e->flags);
1661 output_sleb128 (ob, -1);
1663 bb = ENTRY_BLOCK_PTR;
1666 output_sleb128 (ob, bb->next_bb->index);
1670 output_sleb128 (ob, -1);
1672 ob->main_stream = tmp_stream;
1676 /* Output PHI function PHI to the main stream in OB. */
1679 output_phi (struct output_block *ob, gimple phi)
1681 unsigned i, len = gimple_phi_num_args (phi);
1683 output_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI));
1684 output_uleb128 (ob, SSA_NAME_VERSION (PHI_RESULT (phi)));
1686 for (i = 0; i < len; i++)
1688 lto_output_tree_ref (ob, gimple_phi_arg_def (phi, i));
1689 output_uleb128 (ob, gimple_phi_arg_edge (phi, i)->src->index);
1690 lto_output_location (ob, gimple_phi_arg_location (phi, i));
1695 /* Emit statement STMT on the main stream of output block OB. */
1698 output_gimple_stmt (struct output_block *ob, gimple stmt)
1701 enum gimple_code code;
1703 struct bitpack_d bp;
1705 /* Emit identifying tag. */
1706 code = gimple_code (stmt);
1707 tag = lto_gimple_code_to_tag (code);
1708 output_record_start (ob, tag);
1710 /* Emit the tuple header. */
1711 bp = bitpack_create (ob->main_stream);
1712 bp_pack_value (&bp, gimple_num_ops (stmt), sizeof (unsigned) * 8);
1713 bp_pack_value (&bp, gimple_no_warning_p (stmt), 1);
1714 if (is_gimple_assign (stmt))
1715 bp_pack_value (&bp, gimple_assign_nontemporal_move_p (stmt), 1);
1716 bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1);
1717 bp_pack_value (&bp, stmt->gsbase.subcode, 16);
1718 lto_output_bitpack (&bp);
1720 /* Emit location information for the statement. */
1721 lto_output_location (ob, gimple_location (stmt));
1723 /* Emit the lexical block holding STMT. */
1724 lto_output_tree (ob, gimple_block (stmt), true);
1726 /* Emit the operands. */
1727 switch (gimple_code (stmt))
1730 output_sleb128 (ob, gimple_resx_region (stmt));
1733 case GIMPLE_EH_MUST_NOT_THROW:
1734 lto_output_tree_ref (ob, gimple_eh_must_not_throw_fndecl (stmt));
1737 case GIMPLE_EH_DISPATCH:
1738 output_sleb128 (ob, gimple_eh_dispatch_region (stmt));
1742 lto_output_uleb128_stream (ob->main_stream, gimple_asm_ninputs (stmt));
1743 lto_output_uleb128_stream (ob->main_stream, gimple_asm_noutputs (stmt));
1744 lto_output_uleb128_stream (ob->main_stream, gimple_asm_nclobbers (stmt));
1745 lto_output_uleb128_stream (ob->main_stream, gimple_asm_nlabels (stmt));
1746 output_string (ob, ob->main_stream, gimple_asm_string (stmt));
1757 for (i = 0; i < gimple_num_ops (stmt); i++)
1759 tree op = gimple_op (stmt, i);
1760 /* Wrap all uses of non-automatic variables inside MEM_REFs
1761 so that we do not have to deal with type mismatches on
1762 merged symbols during IL read in. The first operand
1763 of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */
1764 if (op && (i || !is_gimple_debug (stmt)))
1767 while (handled_component_p (*basep))
1768 basep = &TREE_OPERAND (*basep, 0);
1769 if (TREE_CODE (*basep) == VAR_DECL
1770 && !auto_var_in_fn_p (*basep, current_function_decl))
1772 bool volatilep = TREE_THIS_VOLATILE (*basep);
1773 *basep = build2 (MEM_REF, TREE_TYPE (*basep),
1774 build_fold_addr_expr (*basep),
1775 build_int_cst (build_pointer_type
1776 (TREE_TYPE (*basep)), 0));
1777 TREE_THIS_VOLATILE (*basep) = volatilep;
1780 lto_output_tree_ref (ob, op);
1785 case GIMPLE_PREDICT:
1794 /* Output a basic block BB to the main stream in OB for this FN. */
1797 output_bb (struct output_block *ob, basic_block bb, struct function *fn)
1799 gimple_stmt_iterator bsi = gsi_start_bb (bb);
1801 output_record_start (ob,
1802 (!gsi_end_p (bsi)) || phi_nodes (bb)
1806 output_uleb128 (ob, bb->index);
1807 output_sleb128 (ob, bb->count);
1808 output_sleb128 (ob, bb->loop_depth);
1809 output_sleb128 (ob, bb->frequency);
1810 output_sleb128 (ob, bb->flags);
1812 if (!gsi_end_p (bsi) || phi_nodes (bb))
1814 /* Output the statements. The list of statements is terminated
1816 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
1819 gimple stmt = gsi_stmt (bsi);
1821 output_gimple_stmt (ob, stmt);
1823 /* Emit the EH region holding STMT. */
1824 region = lookup_stmt_eh_lp_fn (fn, stmt);
1827 output_record_start (ob, LTO_eh_region);
1828 output_sleb128 (ob, region);
1836 for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi))
1838 gimple phi = gsi_stmt (bsi);
1840 /* Only emit PHIs for gimple registers. PHI nodes for .MEM
1841 will be filled in on reading when the SSA form is
1843 if (is_gimple_reg (gimple_phi_result (phi)))
1844 output_phi (ob, phi);
1851 /* Create the header in the file using OB. If the section type is for
1852 a function, set FN to the decl for that function. */
1855 produce_asm (struct output_block *ob, tree fn)
1857 enum lto_section_type section_type = ob->section_type;
1858 struct lto_function_header header;
1860 struct lto_output_stream *header_stream;
1862 if (section_type == LTO_section_function_body)
1864 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn));
1865 section_name = lto_get_section_name (section_type, name, NULL);
1868 section_name = lto_get_section_name (section_type, NULL, NULL);
1870 lto_begin_section (section_name, !flag_wpa);
1871 free (section_name);
1873 /* The entire header is stream computed here. */
1874 memset (&header, 0, sizeof (struct lto_function_header));
1876 /* Write the header. */
1877 header.lto_header.major_version = LTO_major_version;
1878 header.lto_header.minor_version = LTO_minor_version;
1879 header.lto_header.section_type = section_type;
1881 header.compressed_size = 0;
1883 if (section_type == LTO_section_function_body)
1884 header.cfg_size = ob->cfg_stream->total_size;
1885 header.main_size = ob->main_stream->total_size;
1886 header.string_size = ob->string_stream->total_size;
1888 header_stream = XCNEW (struct lto_output_stream);
1889 lto_output_data_stream (header_stream, &header, sizeof header);
1890 lto_write_stream (header_stream);
1891 free (header_stream);
1893 /* Put all of the gimple and the string table out the asm file as a
1895 if (section_type == LTO_section_function_body)
1896 lto_write_stream (ob->cfg_stream);
1897 lto_write_stream (ob->main_stream);
1898 lto_write_stream (ob->string_stream);
1904 /* Output the body of function NODE->DECL. */
1907 output_function (struct cgraph_node *node)
1909 struct bitpack_d bp;
1911 struct function *fn;
1913 struct output_block *ob;
1917 function = node->decl;
1918 fn = DECL_STRUCT_FUNCTION (function);
1919 ob = create_output_block (LTO_section_function_body);
1921 clear_line_info (ob);
1922 ob->cgraph_node = node;
1924 gcc_assert (current_function_decl == NULL_TREE && cfun == NULL);
1926 /* Set current_function_decl and cfun. */
1927 current_function_decl = function;
1930 /* Make string 0 be a NULL string. */
1931 lto_output_1_stream (ob->string_stream, 0);
1933 output_record_start (ob, LTO_function);
1935 /* Write all the attributes for FN. */
1936 bp = bitpack_create (ob->main_stream);
1937 bp_pack_value (&bp, fn->is_thunk, 1);
1938 bp_pack_value (&bp, fn->has_local_explicit_reg_vars, 1);
1939 bp_pack_value (&bp, fn->after_tree_profile, 1);
1940 bp_pack_value (&bp, fn->returns_pcc_struct, 1);
1941 bp_pack_value (&bp, fn->returns_struct, 1);
1942 bp_pack_value (&bp, fn->can_throw_non_call_exceptions, 1);
1943 bp_pack_value (&bp, fn->always_inline_functions_inlined, 1);
1944 bp_pack_value (&bp, fn->after_inlining, 1);
1945 bp_pack_value (&bp, fn->dont_save_pending_sizes_p, 1);
1946 bp_pack_value (&bp, fn->stdarg, 1);
1947 bp_pack_value (&bp, fn->has_nonlocal_label, 1);
1948 bp_pack_value (&bp, fn->calls_alloca, 1);
1949 bp_pack_value (&bp, fn->calls_setjmp, 1);
1950 bp_pack_value (&bp, fn->va_list_fpr_size, 8);
1951 bp_pack_value (&bp, fn->va_list_gpr_size, 8);
1952 lto_output_bitpack (&bp);
1954 /* Output the function start and end loci. */
1955 lto_output_location (ob, fn->function_start_locus);
1956 lto_output_location (ob, fn->function_end_locus);
1958 /* Output current IL state of the function. */
1959 output_uleb128 (ob, fn->curr_properties);
1961 /* Output the static chain and non-local goto save area. */
1962 lto_output_tree_ref (ob, fn->static_chain_decl);
1963 lto_output_tree_ref (ob, fn->nonlocal_goto_save_area);
1965 /* Output all the local variables in the function. */
1966 output_sleb128 (ob, VEC_length (tree, fn->local_decls));
1967 FOR_EACH_VEC_ELT (tree, fn->local_decls, i, t)
1968 lto_output_tree_ref (ob, t);
1970 /* Output the head of the arguments list. */
1971 lto_output_tree_ref (ob, DECL_ARGUMENTS (function));
1973 /* Output all the SSA names used in the function. */
1974 output_ssa_names (ob, fn);
1976 /* Output any exception handling regions. */
1977 output_eh_regions (ob, fn);
1979 /* Output DECL_INITIAL for the function, which contains the tree of
1981 lto_output_tree (ob, DECL_INITIAL (function), true);
1983 /* We will renumber the statements. The code that does this uses
1984 the same ordering that we use for serializing them so we can use
1985 the same code on the other end and not have to write out the
1986 statement numbers. */
1987 renumber_gimple_stmt_uids ();
1989 /* Output the code for the function. */
1990 FOR_ALL_BB_FN (bb, fn)
1991 output_bb (ob, bb, fn);
1993 /* The terminator for this function. */
1996 output_cfg (ob, fn);
1998 /* Create a section to hold the pickled output of this function. */
1999 produce_asm (ob, function);
2001 destroy_output_block (ob);
2003 current_function_decl = NULL;
2008 /* Return true if alias pair P belongs to the set of cgraph nodes in
2009 SET. If P is a an alias for a VAR_DECL, it can always be emitted.
2010 However, for FUNCTION_DECL aliases, we should only output the pair
2011 if it belongs to a function whose cgraph node is in SET.
2012 Otherwise, the LTRANS phase will get into trouble when finalizing
2013 aliases because the alias will refer to a function not defined in
2014 the file processed by LTRANS. */
2017 output_alias_pair_p (alias_pair *p, cgraph_node_set set, varpool_node_set vset)
2019 if (TREE_CODE (p->decl) == VAR_DECL)
2020 return varpool_node_in_set_p (varpool_node_for_asm (p->target), vset);
2022 /* Check if the assembler name for P->TARGET has its cgraph node in SET. */
2023 gcc_assert (TREE_CODE (p->decl) == FUNCTION_DECL);
2024 return cgraph_node_in_set_p (cgraph_node_for_asm (p->target), set);
2028 /* Output any unreferenced global symbol defined in SET, alias pairs
2032 output_unreferenced_globals (cgraph_node_set set, varpool_node_set vset)
2034 struct output_block *ob;
2037 struct varpool_node *vnode;
2039 ob = create_output_block (LTO_section_static_initializer);
2040 ob->cgraph_node = NULL;
2042 clear_line_info (ob);
2044 /* Make string 0 be a NULL string. */
2045 lto_output_1_stream (ob->string_stream, 0);
2047 /* Emit references for all the global symbols. If a global symbol
2048 was never referenced in any of the functions of this file, it
2049 would not be emitted otherwise. This will result in unreferenced
2050 symbols at link time if a file defines a global symbol but
2051 never references it. */
2052 FOR_EACH_STATIC_VARIABLE (vnode)
2053 if (vnode->needed && varpool_node_in_set_p (vnode, vset))
2055 tree var = vnode->decl;
2057 if (TREE_CODE (var) == VAR_DECL)
2059 /* Output the object in order to output references used in the
2061 lto_output_tree (ob, var, true);
2063 /* If it is public we also need a reference to the object itself. */
2064 if (TREE_PUBLIC (var))
2065 lto_output_tree_ref (ob, var);
2071 /* Emit the alias pairs for the nodes in SET. */
2072 FOR_EACH_VEC_ELT (alias_pair, alias_pairs, i, p)
2074 if (output_alias_pair_p (p, set, vset))
2076 lto_output_tree_ref (ob, p->decl);
2077 lto_output_tree_ref (ob, p->target);
2083 produce_asm (ob, NULL);
2084 destroy_output_block (ob);
2088 /* Copy the function body of NODE without deserializing. */
2091 copy_function (struct cgraph_node *node)
2093 tree function = node->decl;
2094 struct lto_file_decl_data *file_data = node->local.lto_file_data;
2095 struct lto_output_stream *output_stream = XCNEW (struct lto_output_stream);
2098 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (function));
2099 char *section_name =
2100 lto_get_section_name (LTO_section_function_body, name, NULL);
2102 struct lto_in_decl_state *in_state;
2103 struct lto_out_decl_state *out_state = lto_get_out_decl_state ();
2105 lto_begin_section (section_name, !flag_wpa);
2106 free (section_name);
2108 /* We may have renamed the declaration, e.g., a static function. */
2109 name = lto_get_decl_name_mapping (file_data, name);
2111 data = lto_get_section_data (file_data, LTO_section_function_body,
2115 /* Do a bit copy of the function body. */
2116 lto_output_data_stream (output_stream, data, len);
2117 lto_write_stream (output_stream);
2121 lto_get_function_in_decl_state (node->local.lto_file_data, function);
2122 gcc_assert (in_state);
2124 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2126 size_t n = in_state->streams[i].size;
2127 tree *trees = in_state->streams[i].trees;
2128 struct lto_tree_ref_encoder *encoder = &(out_state->streams[i]);
2130 /* The out state must have the same indices and the in state.
2131 So just copy the vector. All the encoders in the in state
2132 must be empty where we reach here. */
2133 gcc_assert (lto_tree_ref_encoder_size (encoder) == 0);
2134 for (j = 0; j < n; j++)
2135 VEC_safe_push (tree, heap, encoder->trees, trees[j]);
2136 encoder->next_index = n;
2139 lto_free_section_data (file_data, LTO_section_function_body, name,
2141 free (output_stream);
2146 /* Initialize the LTO writer. */
2149 lto_writer_init (void)
2151 lto_streamer_init ();
2155 /* Main entry point from the pass manager. */
2158 lto_output (cgraph_node_set set, varpool_node_set vset)
2160 struct cgraph_node *node;
2161 struct lto_out_decl_state *decl_state;
2162 #ifdef ENABLE_CHECKING
2163 bitmap output = lto_bitmap_alloc ();
2166 lto_cgraph_encoder_t encoder = lto_get_out_decl_state ()->cgraph_node_encoder;
2170 n_nodes = lto_cgraph_encoder_size (encoder);
2171 /* Process only the functions with bodies. */
2172 for (i = 0; i < n_nodes; i++)
2174 node = lto_cgraph_encoder_deref (encoder, i);
2175 if (lto_cgraph_encoder_encode_body_p (encoder, node))
2177 #ifdef ENABLE_CHECKING
2178 gcc_assert (!bitmap_bit_p (output, DECL_UID (node->decl)));
2179 bitmap_set_bit (output, DECL_UID (node->decl));
2181 decl_state = lto_new_out_decl_state ();
2182 lto_push_out_decl_state (decl_state);
2183 if (gimple_has_body_p (node->decl))
2184 output_function (node);
2186 copy_function (node);
2187 gcc_assert (lto_get_out_decl_state () == decl_state);
2188 lto_pop_out_decl_state ();
2189 lto_record_function_out_decl_state (node->decl, decl_state);
2193 /* Emit the callgraph after emitting function bodies. This needs to
2194 be done now to make sure that all the statements in every function
2195 have been renumbered so that edges can be associated with call
2196 statements using the statement UIDs. */
2197 output_cgraph (set, vset);
2199 #ifdef ENABLE_CHECKING
2200 lto_bitmap_free (output);
2204 struct ipa_opt_pass_d pass_ipa_lto_gimple_out =
2208 "lto_gimple_out", /* name */
2209 gate_lto_out, /* gate */
2213 0, /* static_pass_number */
2214 TV_IPA_LTO_GIMPLE_OUT, /* tv_id */
2215 0, /* properties_required */
2216 0, /* properties_provided */
2217 0, /* properties_destroyed */
2218 0, /* todo_flags_start */
2219 TODO_dump_func /* todo_flags_finish */
2221 NULL, /* generate_summary */
2222 lto_output, /* write_summary */
2223 NULL, /* read_summary */
2224 lto_output, /* write_optimization_summary */
2225 NULL, /* read_optimization_summary */
2226 NULL, /* stmt_fixup */
2228 NULL, /* function_transform */
2229 NULL /* variable_transform */
2233 /* Write each node in encoded by ENCODER to OB, as well as those reachable
2234 from it and required for correct representation of its semantics.
2235 Each node in ENCODER must be a global declaration or a type. A node
2236 is written only once, even if it appears multiple times in the
2237 vector. Certain transitively-reachable nodes, such as those
2238 representing expressions, may be duplicated, but such nodes
2239 must not appear in ENCODER itself. */
2242 write_global_stream (struct output_block *ob,
2243 struct lto_tree_ref_encoder *encoder)
2247 const size_t size = lto_tree_ref_encoder_size (encoder);
2249 for (index = 0; index < size; index++)
2251 t = lto_tree_ref_encoder_get_tree (encoder, index);
2252 if (!lto_streamer_cache_lookup (ob->writer_cache, t, NULL))
2253 lto_output_tree (ob, t, false);
2258 /* Write a sequence of indices into the globals vector corresponding
2259 to the trees in ENCODER. These are used by the reader to map the
2260 indices used to refer to global entities within function bodies to
2264 write_global_references (struct output_block *ob,
2265 struct lto_output_stream *ref_stream,
2266 struct lto_tree_ref_encoder *encoder)
2270 const int32_t size = lto_tree_ref_encoder_size (encoder);
2272 /* Write size as 32-bit unsigned. */
2273 lto_output_data_stream (ref_stream, &size, sizeof (int32_t));
2275 for (index = 0; index < size; index++)
2279 t = lto_tree_ref_encoder_get_tree (encoder, index);
2280 lto_streamer_cache_lookup (ob->writer_cache, t, &slot_num);
2281 gcc_assert (slot_num >= 0);
2282 lto_output_data_stream (ref_stream, &slot_num, sizeof slot_num);
2287 /* Write all the streams in an lto_out_decl_state STATE using
2288 output block OB and output stream OUT_STREAM. */
2291 lto_output_decl_state_streams (struct output_block *ob,
2292 struct lto_out_decl_state *state)
2296 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2297 write_global_stream (ob, &state->streams[i]);
2301 /* Write all the references in an lto_out_decl_state STATE using
2302 output block OB and output stream OUT_STREAM. */
2305 lto_output_decl_state_refs (struct output_block *ob,
2306 struct lto_output_stream *out_stream,
2307 struct lto_out_decl_state *state)
2313 /* Write reference to FUNCTION_DECL. If there is not function,
2314 write reference to void_type_node. */
2315 decl = (state->fn_decl) ? state->fn_decl : void_type_node;
2316 lto_streamer_cache_lookup (ob->writer_cache, decl, &ref);
2317 gcc_assert (ref >= 0);
2318 lto_output_data_stream (out_stream, &ref, sizeof (int32_t));
2320 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2321 write_global_references (ob, out_stream, &state->streams[i]);
2325 /* Return the written size of STATE. */
2328 lto_out_decl_state_written_size (struct lto_out_decl_state *state)
2333 size = sizeof (int32_t); /* fn_ref. */
2334 for (i = 0; i < LTO_N_DECL_STREAMS; i++)
2336 size += sizeof (int32_t); /* vector size. */
2337 size += (lto_tree_ref_encoder_size (&state->streams[i])
2338 * sizeof (int32_t));
2344 /* Write symbol T into STREAM in CACHE. SEEN specifies symbols we wrote
2348 write_symbol (struct lto_streamer_cache_d *cache,
2349 struct lto_output_stream *stream,
2350 tree t, struct pointer_set_t *seen, bool alias)
2353 enum gcc_plugin_symbol_kind kind;
2354 enum gcc_plugin_symbol_visibility visibility;
2359 /* None of the following kinds of symbols are needed in the
2361 if (!TREE_PUBLIC (t)
2362 || is_builtin_fn (t)
2363 || DECL_ABSTRACT (t)
2364 || TREE_CODE (t) == RESULT_DECL)
2367 gcc_assert (TREE_CODE (t) == VAR_DECL
2368 || TREE_CODE (t) == FUNCTION_DECL);
2370 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (t));
2372 /* This behaves like assemble_name_raw in varasm.c, performing the
2373 same name manipulations that ASM_OUTPUT_LABELREF does. */
2374 name = IDENTIFIER_POINTER ((*targetm.asm_out.mangle_assembler_name) (name));
2376 if (pointer_set_contains (seen, name))
2378 pointer_set_insert (seen, name);
2380 lto_streamer_cache_lookup (cache, t, &slot_num);
2381 gcc_assert (slot_num >= 0);
2383 if (DECL_EXTERNAL (t))
2386 kind = GCCPK_WEAKUNDEF;
2393 kind = GCCPK_WEAKDEF;
2394 else if (DECL_COMMON (t))
2395 kind = GCCPK_COMMON;
2399 /* When something is defined, it should have node attached. */
2400 gcc_assert (alias || TREE_CODE (t) != VAR_DECL
2401 || varpool_get_node (t)->finalized);
2402 gcc_assert (alias || TREE_CODE (t) != FUNCTION_DECL
2403 || (cgraph_get_node (t)
2404 && cgraph_get_node (t)->analyzed));
2407 /* Imitate what default_elf_asm_output_external do.
2408 When symbol is external, we need to output it with DEFAULT visibility
2409 when compiling with -fvisibility=default, while with HIDDEN visibility
2410 when symbol has attribute (visibility("hidden")) specified.
2411 targetm.binds_local_p check DECL_VISIBILITY_SPECIFIED and gets this
2414 if (DECL_EXTERNAL (t)
2415 && !targetm.binds_local_p (t))
2416 visibility = GCCPV_DEFAULT;
2418 switch (DECL_VISIBILITY(t))
2420 case VISIBILITY_DEFAULT:
2421 visibility = GCCPV_DEFAULT;
2423 case VISIBILITY_PROTECTED:
2424 visibility = GCCPV_PROTECTED;
2426 case VISIBILITY_HIDDEN:
2427 visibility = GCCPV_HIDDEN;
2429 case VISIBILITY_INTERNAL:
2430 visibility = GCCPV_INTERNAL;
2434 if (kind == GCCPK_COMMON
2436 && TREE_CODE (DECL_SIZE (t)) == INTEGER_CST)
2438 size = (HOST_BITS_PER_WIDE_INT >= 64)
2439 ? (uint64_t) int_size_in_bytes (TREE_TYPE (t))
2440 : (((uint64_t) TREE_INT_CST_HIGH (DECL_SIZE_UNIT (t))) << 32)
2441 | TREE_INT_CST_LOW (DECL_SIZE_UNIT (t));
2446 if (DECL_ONE_ONLY (t))
2447 comdat = IDENTIFIER_POINTER (DECL_COMDAT_GROUP (t));
2451 lto_output_data_stream (stream, name, strlen (name) + 1);
2452 lto_output_data_stream (stream, comdat, strlen (comdat) + 1);
2453 lto_output_data_stream (stream, &kind, 1);
2454 lto_output_data_stream (stream, &visibility, 1);
2455 lto_output_data_stream (stream, &size, 8);
2456 lto_output_data_stream (stream, &slot_num, 4);
2460 /* Write an IL symbol table to OB.
2461 SET and VSET are cgraph/varpool node sets we are outputting. */
2464 produce_symtab (struct output_block *ob,
2465 cgraph_node_set set, varpool_node_set vset)
2467 struct lto_streamer_cache_d *cache = ob->writer_cache;
2468 char *section_name = lto_get_section_name (LTO_section_symtab, NULL, NULL);
2469 struct pointer_set_t *seen;
2470 struct cgraph_node *node, *alias;
2471 struct varpool_node *vnode, *valias;
2472 struct lto_output_stream stream;
2473 lto_varpool_encoder_t varpool_encoder = ob->decl_state->varpool_node_encoder;
2474 lto_cgraph_encoder_t encoder = ob->decl_state->cgraph_node_encoder;
2478 lto_begin_section (section_name, false);
2479 free (section_name);
2481 seen = pointer_set_create ();
2482 memset (&stream, 0, sizeof (stream));
2484 /* Write all functions.
2485 First write all defined functions and the write all used functions.
2486 This is done so only to handle duplicated symbols in cgraph. */
2487 for (i = 0; i < lto_cgraph_encoder_size (encoder); i++)
2489 node = lto_cgraph_encoder_deref (encoder, i);
2490 if (DECL_EXTERNAL (node->decl))
2492 if (DECL_COMDAT (node->decl)
2493 && cgraph_comdat_can_be_unshared_p (node))
2495 if (node->alias || node->global.inlined_to)
2497 write_symbol (cache, &stream, node->decl, seen, false);
2498 for (alias = node->same_body; alias; alias = alias->next)
2499 write_symbol (cache, &stream, alias->decl, seen, true);
2501 for (i = 0; i < lto_cgraph_encoder_size (encoder); i++)
2503 node = lto_cgraph_encoder_deref (encoder, i);
2504 if (!DECL_EXTERNAL (node->decl))
2506 if (DECL_COMDAT (node->decl)
2507 && cgraph_comdat_can_be_unshared_p (node))
2509 if (node->alias || node->global.inlined_to)
2511 write_symbol (cache, &stream, node->decl, seen, false);
2512 for (alias = node->same_body; alias; alias = alias->next)
2513 write_symbol (cache, &stream, alias->decl, seen, true);
2516 /* Write all variables. */
2517 for (i = 0; i < lto_varpool_encoder_size (varpool_encoder); i++)
2519 vnode = lto_varpool_encoder_deref (varpool_encoder, i);
2520 if (DECL_EXTERNAL (vnode->decl))
2522 /* COMDAT virtual tables can be unshared. Do not declare them
2523 in the LTO symbol table to prevent linker from forcing them
2525 if (DECL_COMDAT (vnode->decl)
2526 && !vnode->force_output
2528 && DECL_VIRTUAL_P (vnode->decl))
2532 write_symbol (cache, &stream, vnode->decl, seen, false);
2533 for (valias = vnode->extra_name; valias; valias = valias->next)
2534 write_symbol (cache, &stream, valias->decl, seen, true);
2536 for (i = 0; i < lto_varpool_encoder_size (varpool_encoder); i++)
2538 vnode = lto_varpool_encoder_deref (varpool_encoder, i);
2539 if (!DECL_EXTERNAL (vnode->decl))
2541 if (DECL_COMDAT (vnode->decl)
2542 && !vnode->force_output
2544 && DECL_VIRTUAL_P (vnode->decl))
2548 write_symbol (cache, &stream, vnode->decl, seen, false);
2549 for (valias = vnode->extra_name; valias; valias = valias->next)
2550 write_symbol (cache, &stream, valias->decl, seen, true);
2553 /* Write all aliases. */
2554 FOR_EACH_VEC_ELT (alias_pair, alias_pairs, i, p)
2555 if (output_alias_pair_p (p, set, vset))
2556 write_symbol (cache, &stream, p->decl, seen, true);
2558 lto_write_stream (&stream);
2559 pointer_set_destroy (seen);
2565 /* This pass is run after all of the functions are serialized and all
2566 of the IPA passes have written their serialized forms. This pass
2567 causes the vector of all of the global decls and types used from
2568 this file to be written in to a section that can then be read in to
2569 recover these on other side. */
2572 produce_asm_for_decls (cgraph_node_set set, varpool_node_set vset)
2574 struct lto_out_decl_state *out_state;
2575 struct lto_out_decl_state *fn_out_state;
2576 struct lto_decl_header header;
2578 struct output_block *ob;
2579 struct lto_output_stream *header_stream, *decl_state_stream;
2580 unsigned idx, num_fns;
2581 size_t decl_state_size;
2582 int32_t num_decl_states;
2584 ob = create_output_block (LTO_section_decls);
2587 /* Write out unreferenced globals, alias pairs and labels. We defer
2588 doing this until now so that we can write out only what is
2590 output_unreferenced_globals (set, vset);
2592 memset (&header, 0, sizeof (struct lto_decl_header));
2594 section_name = lto_get_section_name (LTO_section_decls, NULL, NULL);
2595 lto_begin_section (section_name, !flag_wpa);
2596 free (section_name);
2598 /* Make string 0 be a NULL string. */
2599 lto_output_1_stream (ob->string_stream, 0);
2601 /* Write the global symbols. */
2602 out_state = lto_get_out_decl_state ();
2603 num_fns = VEC_length (lto_out_decl_state_ptr, lto_function_decl_states);
2604 lto_output_decl_state_streams (ob, out_state);
2605 for (idx = 0; idx < num_fns; idx++)
2608 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2609 lto_output_decl_state_streams (ob, fn_out_state);
2612 header.lto_header.major_version = LTO_major_version;
2613 header.lto_header.minor_version = LTO_minor_version;
2614 header.lto_header.section_type = LTO_section_decls;
2616 /* Currently not used. This field would allow us to preallocate
2617 the globals vector, so that it need not be resized as it is extended. */
2618 header.num_nodes = -1;
2620 /* Compute the total size of all decl out states. */
2621 decl_state_size = sizeof (int32_t);
2622 decl_state_size += lto_out_decl_state_written_size (out_state);
2623 for (idx = 0; idx < num_fns; idx++)
2626 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2627 decl_state_size += lto_out_decl_state_written_size (fn_out_state);
2629 header.decl_state_size = decl_state_size;
2631 header.main_size = ob->main_stream->total_size;
2632 header.string_size = ob->string_stream->total_size;
2634 header_stream = XCNEW (struct lto_output_stream);
2635 lto_output_data_stream (header_stream, &header, sizeof header);
2636 lto_write_stream (header_stream);
2637 free (header_stream);
2639 /* Write the main out-decl state, followed by out-decl states of
2641 decl_state_stream = ((struct lto_output_stream *)
2642 xcalloc (1, sizeof (struct lto_output_stream)));
2643 num_decl_states = num_fns + 1;
2644 lto_output_data_stream (decl_state_stream, &num_decl_states,
2645 sizeof (num_decl_states));
2646 lto_output_decl_state_refs (ob, decl_state_stream, out_state);
2647 for (idx = 0; idx < num_fns; idx++)
2650 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2651 lto_output_decl_state_refs (ob, decl_state_stream, fn_out_state);
2653 lto_write_stream (decl_state_stream);
2654 free(decl_state_stream);
2656 lto_write_stream (ob->main_stream);
2657 lto_write_stream (ob->string_stream);
2661 /* Write the symbol table. It is used by linker to determine dependencies
2662 and thus we can skip it for WPA. */
2664 produce_symtab (ob, set, vset);
2666 /* Write command line opts. */
2667 lto_write_options ();
2669 /* Deallocate memory and clean up. */
2670 for (idx = 0; idx < num_fns; idx++)
2673 VEC_index (lto_out_decl_state_ptr, lto_function_decl_states, idx);
2674 lto_delete_out_decl_state (fn_out_state);
2676 lto_cgraph_encoder_delete (ob->decl_state->cgraph_node_encoder);
2677 lto_varpool_encoder_delete (ob->decl_state->varpool_node_encoder);
2678 VEC_free (lto_out_decl_state_ptr, heap, lto_function_decl_states);
2679 lto_function_decl_states = NULL;
2680 destroy_output_block (ob);
2684 struct ipa_opt_pass_d pass_ipa_lto_finish_out =
2688 "lto_decls_out", /* name */
2689 gate_lto_out, /* gate */
2693 0, /* static_pass_number */
2694 TV_IPA_LTO_DECL_OUT, /* tv_id */
2695 0, /* properties_required */
2696 0, /* properties_provided */
2697 0, /* properties_destroyed */
2698 0, /* todo_flags_start */
2699 0 /* todo_flags_finish */
2701 NULL, /* generate_summary */
2702 produce_asm_for_decls, /* write_summary */
2703 NULL, /* read_summary */
2704 produce_asm_for_decls, /* write_optimization_summary */
2705 NULL, /* read_optimization_summary */
2706 NULL, /* stmt_fixup */
2708 NULL, /* function_transform */
2709 NULL /* variable_transform */