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"
44 #include "data-streamer.h"
45 #include "gimple-streamer.h"
46 #include "tree-streamer.h"
47 #include "streamer-hooks.h"
50 /* Clear the line info stored in DATA_IN. */
53 clear_line_info (struct output_block
*ob
)
55 ob
->current_file
= NULL
;
61 /* Create the output block and return it. SECTION_TYPE is
62 LTO_section_function_body or LTO_static_initializer. */
65 create_output_block (enum lto_section_type section_type
)
67 struct output_block
*ob
= XCNEW (struct output_block
);
69 ob
->section_type
= section_type
;
70 ob
->decl_state
= lto_get_out_decl_state ();
71 ob
->main_stream
= XCNEW (struct lto_output_stream
);
72 ob
->string_stream
= XCNEW (struct lto_output_stream
);
73 ob
->writer_cache
= streamer_tree_cache_create ();
75 if (section_type
== LTO_section_function_body
)
76 ob
->cfg_stream
= XCNEW (struct lto_output_stream
);
80 ob
->string_hash_table
= htab_create (37, hash_string_slot_node
,
81 eq_string_slot_node
, NULL
);
82 gcc_obstack_init (&ob
->obstack
);
88 /* Destroy the output block OB. */
91 destroy_output_block (struct output_block
*ob
)
93 enum lto_section_type section_type
= ob
->section_type
;
95 htab_delete (ob
->string_hash_table
);
97 free (ob
->main_stream
);
98 free (ob
->string_stream
);
99 if (section_type
== LTO_section_function_body
)
100 free (ob
->cfg_stream
);
102 streamer_tree_cache_delete (ob
->writer_cache
);
103 obstack_free (&ob
->obstack
, NULL
);
109 /* Look up NODE in the type table and write the index for it to OB. */
112 output_type_ref (struct output_block
*ob
, tree node
)
114 streamer_write_record_start (ob
, LTO_type_ref
);
115 lto_output_type_ref_index (ob
->decl_state
, ob
->main_stream
, node
);
119 /* Return true if tree node T is written to various tables. For these
120 nodes, we sometimes want to write their phyiscal representation
121 (via lto_output_tree), and sometimes we need to emit an index
122 reference into a table (via lto_output_tree_ref). */
125 tree_is_indexable (tree t
)
127 if (TREE_CODE (t
) == PARM_DECL
)
129 else if (TREE_CODE (t
) == VAR_DECL
&& decl_function_context (t
)
132 /* Variably modified types need to be streamed alongside function
133 bodies because they can refer to local entities. Together with
134 them we have to localize their members as well.
135 ??? In theory that includes non-FIELD_DECLs as well. */
137 && variably_modified_type_p (t
, NULL_TREE
))
139 else if (TREE_CODE (t
) == FIELD_DECL
140 && variably_modified_type_p (DECL_CONTEXT (t
), NULL_TREE
))
143 return (TYPE_P (t
) || DECL_P (t
) || TREE_CODE (t
) == SSA_NAME
);
147 /* Output info about new location into bitpack BP.
148 After outputting bitpack, lto_output_location_data has
149 to be done to output actual data. */
152 lto_output_location_bitpack (struct bitpack_d
*bp
,
153 struct output_block
*ob
,
156 expanded_location xloc
;
158 bp_pack_value (bp
, loc
== UNKNOWN_LOCATION
, 1);
159 if (loc
== UNKNOWN_LOCATION
)
162 xloc
= expand_location (loc
);
164 bp_pack_value (bp
, ob
->current_file
!= xloc
.file
, 1);
165 if (ob
->current_file
!= xloc
.file
)
166 bp_pack_var_len_unsigned (bp
,
167 streamer_string_index (ob
, xloc
.file
,
168 strlen (xloc
.file
) + 1,
170 ob
->current_file
= xloc
.file
;
172 bp_pack_value (bp
, ob
->current_line
!= xloc
.line
, 1);
173 if (ob
->current_line
!= xloc
.line
)
174 bp_pack_var_len_unsigned (bp
, xloc
.line
);
175 ob
->current_line
= xloc
.line
;
177 bp_pack_value (bp
, ob
->current_col
!= xloc
.column
, 1);
178 if (ob
->current_col
!= xloc
.column
)
179 bp_pack_var_len_unsigned (bp
, xloc
.column
);
180 ob
->current_col
= xloc
.column
;
184 /* Emit location LOC to output block OB.
185 If the output_location streamer hook exists, call it.
186 Otherwise, when bitpack is handy, it is more space efficient to call
187 lto_output_location_bitpack with existing bitpack. */
190 lto_output_location (struct output_block
*ob
, location_t loc
)
192 if (streamer_hooks
.output_location
)
193 streamer_hooks
.output_location (ob
, loc
);
196 struct bitpack_d bp
= bitpack_create (ob
->main_stream
);
197 lto_output_location_bitpack (&bp
, ob
, loc
);
198 streamer_write_bitpack (&bp
);
203 /* If EXPR is an indexable tree node, output a reference to it to
204 output block OB. Otherwise, output the physical representation of
208 lto_output_tree_ref (struct output_block
*ob
, tree expr
)
214 output_type_ref (ob
, expr
);
218 code
= TREE_CODE (expr
);
222 streamer_write_record_start (ob
, LTO_ssa_name_ref
);
223 streamer_write_uhwi (ob
, SSA_NAME_VERSION (expr
));
227 streamer_write_record_start (ob
, LTO_field_decl_ref
);
228 lto_output_field_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
232 streamer_write_record_start (ob
, LTO_function_decl_ref
);
233 lto_output_fn_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
237 case DEBUG_EXPR_DECL
:
238 gcc_assert (decl_function_context (expr
) == NULL
|| TREE_STATIC (expr
));
239 streamer_write_record_start (ob
, LTO_global_decl_ref
);
240 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
244 streamer_write_record_start (ob
, LTO_const_decl_ref
);
245 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
249 gcc_assert (decl_function_context (expr
) == NULL
);
250 streamer_write_record_start (ob
, LTO_imported_decl_ref
);
251 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
255 streamer_write_record_start (ob
, LTO_type_decl_ref
);
256 lto_output_type_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
260 streamer_write_record_start (ob
, LTO_namespace_decl_ref
);
261 lto_output_namespace_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
265 streamer_write_record_start (ob
, LTO_label_decl_ref
);
266 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
270 streamer_write_record_start (ob
, LTO_result_decl_ref
);
271 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
274 case TRANSLATION_UNIT_DECL
:
275 streamer_write_record_start (ob
, LTO_translation_unit_decl_ref
);
276 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, expr
);
280 /* No other node is indexable, so it should have been handled by
287 /* Return true if EXPR is a tree node that can be written to disk. */
290 lto_is_streamable (tree expr
)
292 enum tree_code code
= TREE_CODE (expr
);
294 /* Notice that we reject SSA_NAMEs as well. We only emit the SSA
295 name version in lto_output_tree_ref (see output_ssa_names). */
296 return !is_lang_specific (expr
)
300 && code
!= MODIFY_EXPR
302 && code
!= TARGET_EXPR
304 && code
!= WITH_CLEANUP_EXPR
305 && code
!= STATEMENT_LIST
306 && code
!= OMP_CLAUSE
307 && (code
== CASE_LABEL_EXPR
309 || TREE_CODE_CLASS (code
) != tcc_statement
);
313 /* Write a physical representation of tree node EXPR to output block
314 OB. If REF_P is true, the leaves of EXPR are emitted as references
315 via lto_output_tree_ref. IX is the index into the streamer cache
316 where EXPR is stored. */
319 lto_write_tree (struct output_block
*ob
, tree expr
, bool ref_p
)
323 if (!lto_is_streamable (expr
))
324 internal_error ("tree code %qs is not supported in LTO streams",
325 tree_code_name
[TREE_CODE (expr
)]);
327 /* Write the header, containing everything needed to materialize
328 EXPR on the reading side. */
329 streamer_write_tree_header (ob
, expr
);
331 /* Pack all the non-pointer fields in EXPR into a bitpack and write
332 the resulting bitpack. */
333 bp
= bitpack_create (ob
->main_stream
);
334 streamer_pack_tree_bitfields (&bp
, expr
);
335 streamer_write_bitpack (&bp
);
337 /* Write all the pointer fields in EXPR. */
338 streamer_write_tree_body (ob
, expr
, ref_p
);
340 /* Write any LTO-specific data to OB. */
342 && TREE_CODE (expr
) != FUNCTION_DECL
343 && TREE_CODE (expr
) != TRANSLATION_UNIT_DECL
)
345 /* Handle DECL_INITIAL for symbols. */
346 tree initial
= DECL_INITIAL (expr
);
347 if (TREE_CODE (expr
) == VAR_DECL
348 && (TREE_STATIC (expr
) || DECL_EXTERNAL (expr
))
351 lto_varpool_encoder_t varpool_encoder
;
352 struct varpool_node
*vnode
;
354 varpool_encoder
= ob
->decl_state
->varpool_node_encoder
;
355 vnode
= varpool_get_node (expr
);
357 initial
= error_mark_node
;
358 else if (!lto_varpool_encoder_encode_initializer_p (varpool_encoder
,
363 stream_write_tree (ob
, initial
, ref_p
);
366 /* Mark the end of EXPR. */
367 streamer_write_zero (ob
);
371 /* Emit the physical representation of tree node EXPR to output block
372 OB. If THIS_REF_P is true, the leaves of EXPR are emitted as references
373 via lto_output_tree_ref. REF_P is used for streaming siblings of EXPR. */
376 lto_output_tree (struct output_block
*ob
, tree expr
,
377 bool ref_p
, bool this_ref_p
)
382 if (expr
== NULL_TREE
)
384 streamer_write_record_start (ob
, LTO_null
);
388 if (this_ref_p
&& tree_is_indexable (expr
))
390 lto_output_tree_ref (ob
, expr
);
394 /* INTEGER_CST nodes are special because they need their original type
395 to be materialized by the reader (to implement TYPE_CACHED_VALUES). */
396 if (TREE_CODE (expr
) == INTEGER_CST
)
398 streamer_write_integer_cst (ob
, expr
, ref_p
);
402 existed_p
= streamer_tree_cache_insert (ob
->writer_cache
, expr
, &ix
);
405 /* If a node has already been streamed out, make sure that
406 we don't write it more than once. Otherwise, the reader
407 will instantiate two different nodes for the same object. */
408 streamer_write_record_start (ob
, LTO_tree_pickle_reference
);
409 streamer_write_uhwi (ob
, ix
);
410 streamer_write_enum (ob
->main_stream
, LTO_tags
, LTO_NUM_TAGS
,
411 lto_tree_code_to_tag (TREE_CODE (expr
)));
413 else if (streamer_handle_as_builtin_p (expr
))
415 /* MD and NORMAL builtins do not need to be written out
416 completely as they are always instantiated by the
417 compiler on startup. The only builtins that need to
418 be written out are BUILT_IN_FRONTEND. For all other
419 builtins, we simply write the class and code. */
420 streamer_write_builtin (ob
, expr
);
424 /* This is the first time we see EXPR, write its fields
426 lto_write_tree (ob
, expr
, ref_p
);
431 /* Output to OB a list of try/catch handlers starting with FIRST. */
434 output_eh_try_list (struct output_block
*ob
, eh_catch first
)
438 for (n
= first
; n
; n
= n
->next_catch
)
440 streamer_write_record_start (ob
, LTO_eh_catch
);
441 stream_write_tree (ob
, n
->type_list
, true);
442 stream_write_tree (ob
, n
->filter_list
, true);
443 stream_write_tree (ob
, n
->label
, true);
446 streamer_write_record_start (ob
, LTO_null
);
450 /* Output EH region R in function FN to OB. CURR_RN is the slot index
451 that is being emitted in FN->EH->REGION_ARRAY. This is used to
452 detect EH region sharing. */
455 output_eh_region (struct output_block
*ob
, eh_region r
)
461 streamer_write_record_start (ob
, LTO_null
);
465 if (r
->type
== ERT_CLEANUP
)
466 tag
= LTO_ert_cleanup
;
467 else if (r
->type
== ERT_TRY
)
469 else if (r
->type
== ERT_ALLOWED_EXCEPTIONS
)
470 tag
= LTO_ert_allowed_exceptions
;
471 else if (r
->type
== ERT_MUST_NOT_THROW
)
472 tag
= LTO_ert_must_not_throw
;
476 streamer_write_record_start (ob
, tag
);
477 streamer_write_hwi (ob
, r
->index
);
480 streamer_write_hwi (ob
, r
->outer
->index
);
482 streamer_write_zero (ob
);
485 streamer_write_hwi (ob
, r
->inner
->index
);
487 streamer_write_zero (ob
);
490 streamer_write_hwi (ob
, r
->next_peer
->index
);
492 streamer_write_zero (ob
);
494 if (r
->type
== ERT_TRY
)
496 output_eh_try_list (ob
, r
->u
.eh_try
.first_catch
);
498 else if (r
->type
== ERT_ALLOWED_EXCEPTIONS
)
500 stream_write_tree (ob
, r
->u
.allowed
.type_list
, true);
501 stream_write_tree (ob
, r
->u
.allowed
.label
, true);
502 streamer_write_uhwi (ob
, r
->u
.allowed
.filter
);
504 else if (r
->type
== ERT_MUST_NOT_THROW
)
506 stream_write_tree (ob
, r
->u
.must_not_throw
.failure_decl
, true);
507 lto_output_location (ob
, r
->u
.must_not_throw
.failure_loc
);
511 streamer_write_hwi (ob
, r
->landing_pads
->index
);
513 streamer_write_zero (ob
);
517 /* Output landing pad LP to OB. */
520 output_eh_lp (struct output_block
*ob
, eh_landing_pad lp
)
524 streamer_write_record_start (ob
, LTO_null
);
528 streamer_write_record_start (ob
, LTO_eh_landing_pad
);
529 streamer_write_hwi (ob
, lp
->index
);
531 streamer_write_hwi (ob
, lp
->next_lp
->index
);
533 streamer_write_zero (ob
);
536 streamer_write_hwi (ob
, lp
->region
->index
);
538 streamer_write_zero (ob
);
540 stream_write_tree (ob
, lp
->post_landing_pad
, true);
544 /* Output the existing eh_table to OB. */
547 output_eh_regions (struct output_block
*ob
, struct function
*fn
)
549 if (fn
->eh
&& fn
->eh
->region_tree
)
556 streamer_write_record_start (ob
, LTO_eh_table
);
558 /* Emit the index of the root of the EH region tree. */
559 streamer_write_hwi (ob
, fn
->eh
->region_tree
->index
);
561 /* Emit all the EH regions in the region array. */
562 streamer_write_hwi (ob
, VEC_length (eh_region
, fn
->eh
->region_array
));
563 FOR_EACH_VEC_ELT (eh_region
, fn
->eh
->region_array
, i
, eh
)
564 output_eh_region (ob
, eh
);
566 /* Emit all landing pads. */
567 streamer_write_hwi (ob
, VEC_length (eh_landing_pad
, fn
->eh
->lp_array
));
568 FOR_EACH_VEC_ELT (eh_landing_pad
, fn
->eh
->lp_array
, i
, lp
)
569 output_eh_lp (ob
, lp
);
571 /* Emit all the runtime type data. */
572 streamer_write_hwi (ob
, VEC_length (tree
, fn
->eh
->ttype_data
));
573 FOR_EACH_VEC_ELT (tree
, fn
->eh
->ttype_data
, i
, ttype
)
574 stream_write_tree (ob
, ttype
, true);
576 /* Emit the table of action chains. */
577 if (targetm
.arm_eabi_unwinder
)
580 streamer_write_hwi (ob
, VEC_length (tree
,
581 fn
->eh
->ehspec_data
.arm_eabi
));
582 FOR_EACH_VEC_ELT (tree
, fn
->eh
->ehspec_data
.arm_eabi
, i
, t
)
583 stream_write_tree (ob
, t
, true);
588 streamer_write_hwi (ob
, VEC_length (uchar
,
589 fn
->eh
->ehspec_data
.other
));
590 FOR_EACH_VEC_ELT (uchar
, fn
->eh
->ehspec_data
.other
, i
, c
)
591 streamer_write_char_stream (ob
->main_stream
, c
);
595 /* The LTO_null either terminates the record or indicates that there
596 are no eh_records at all. */
597 streamer_write_record_start (ob
, LTO_null
);
601 /* Output all of the active ssa names to the ssa_names stream. */
604 output_ssa_names (struct output_block
*ob
, struct function
*fn
)
608 len
= VEC_length (tree
, SSANAMES (fn
));
609 streamer_write_uhwi (ob
, len
);
611 for (i
= 1; i
< len
; i
++)
613 tree ptr
= VEC_index (tree
, SSANAMES (fn
), i
);
616 || SSA_NAME_IN_FREE_LIST (ptr
)
617 || !is_gimple_reg (ptr
))
620 streamer_write_uhwi (ob
, i
);
621 streamer_write_char_stream (ob
->main_stream
,
622 SSA_NAME_IS_DEFAULT_DEF (ptr
));
623 stream_write_tree (ob
, SSA_NAME_VAR (ptr
), true);
626 streamer_write_zero (ob
);
630 /* Output the cfg. */
633 output_cfg (struct output_block
*ob
, struct function
*fn
)
635 struct lto_output_stream
*tmp_stream
= ob
->main_stream
;
638 ob
->main_stream
= ob
->cfg_stream
;
640 streamer_write_enum (ob
->main_stream
, profile_status_d
, PROFILE_LAST
,
641 profile_status_for_function (fn
));
643 /* Output the number of the highest basic block. */
644 streamer_write_uhwi (ob
, last_basic_block_for_function (fn
));
646 FOR_ALL_BB_FN (bb
, fn
)
651 streamer_write_hwi (ob
, bb
->index
);
653 /* Output the successors and the edge flags. */
654 streamer_write_uhwi (ob
, EDGE_COUNT (bb
->succs
));
655 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
657 streamer_write_uhwi (ob
, e
->dest
->index
);
658 streamer_write_hwi (ob
, e
->probability
);
659 streamer_write_hwi (ob
, e
->count
);
660 streamer_write_uhwi (ob
, e
->flags
);
664 streamer_write_hwi (ob
, -1);
666 bb
= ENTRY_BLOCK_PTR
;
669 streamer_write_hwi (ob
, bb
->next_bb
->index
);
673 streamer_write_hwi (ob
, -1);
675 ob
->main_stream
= tmp_stream
;
679 /* Create the header in the file using OB. If the section type is for
680 a function, set FN to the decl for that function. */
683 produce_asm (struct output_block
*ob
, tree fn
)
685 enum lto_section_type section_type
= ob
->section_type
;
686 struct lto_function_header header
;
688 struct lto_output_stream
*header_stream
;
690 if (section_type
== LTO_section_function_body
)
692 const char *name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn
));
693 section_name
= lto_get_section_name (section_type
, name
, NULL
);
696 section_name
= lto_get_section_name (section_type
, NULL
, NULL
);
698 lto_begin_section (section_name
, !flag_wpa
);
701 /* The entire header is stream computed here. */
702 memset (&header
, 0, sizeof (struct lto_function_header
));
704 /* Write the header. */
705 header
.lto_header
.major_version
= LTO_major_version
;
706 header
.lto_header
.minor_version
= LTO_minor_version
;
707 header
.lto_header
.section_type
= section_type
;
709 header
.compressed_size
= 0;
711 if (section_type
== LTO_section_function_body
)
712 header
.cfg_size
= ob
->cfg_stream
->total_size
;
713 header
.main_size
= ob
->main_stream
->total_size
;
714 header
.string_size
= ob
->string_stream
->total_size
;
716 header_stream
= XCNEW (struct lto_output_stream
);
717 lto_output_data_stream (header_stream
, &header
, sizeof header
);
718 lto_write_stream (header_stream
);
719 free (header_stream
);
721 /* Put all of the gimple and the string table out the asm file as a
723 if (section_type
== LTO_section_function_body
)
724 lto_write_stream (ob
->cfg_stream
);
725 lto_write_stream (ob
->main_stream
);
726 lto_write_stream (ob
->string_stream
);
732 /* Output the base body of struct function FN using output block OB. */
735 output_struct_function_base (struct output_block
*ob
, struct function
*fn
)
741 /* Output the static chain and non-local goto save area. */
742 stream_write_tree (ob
, fn
->static_chain_decl
, true);
743 stream_write_tree (ob
, fn
->nonlocal_goto_save_area
, true);
745 /* Output all the local variables in the function. */
746 streamer_write_hwi (ob
, VEC_length (tree
, fn
->local_decls
));
747 FOR_EACH_VEC_ELT (tree
, fn
->local_decls
, i
, t
)
748 stream_write_tree (ob
, t
, true);
750 /* Output the function start and end loci. */
751 lto_output_location (ob
, fn
->function_start_locus
);
752 lto_output_location (ob
, fn
->function_end_locus
);
754 /* Output current IL state of the function. */
755 streamer_write_uhwi (ob
, fn
->curr_properties
);
757 /* Write all the attributes for FN. */
758 bp
= bitpack_create (ob
->main_stream
);
759 bp_pack_value (&bp
, fn
->is_thunk
, 1);
760 bp_pack_value (&bp
, fn
->has_local_explicit_reg_vars
, 1);
761 bp_pack_value (&bp
, fn
->after_tree_profile
, 1);
762 bp_pack_value (&bp
, fn
->returns_pcc_struct
, 1);
763 bp_pack_value (&bp
, fn
->returns_struct
, 1);
764 bp_pack_value (&bp
, fn
->can_throw_non_call_exceptions
, 1);
765 bp_pack_value (&bp
, fn
->always_inline_functions_inlined
, 1);
766 bp_pack_value (&bp
, fn
->after_inlining
, 1);
767 bp_pack_value (&bp
, fn
->stdarg
, 1);
768 bp_pack_value (&bp
, fn
->has_nonlocal_label
, 1);
769 bp_pack_value (&bp
, fn
->calls_alloca
, 1);
770 bp_pack_value (&bp
, fn
->calls_setjmp
, 1);
771 bp_pack_value (&bp
, fn
->va_list_fpr_size
, 8);
772 bp_pack_value (&bp
, fn
->va_list_gpr_size
, 8);
773 streamer_write_bitpack (&bp
);
777 /* Output the body of function NODE->DECL. */
780 output_function (struct cgraph_node
*node
)
785 struct output_block
*ob
;
787 function
= node
->decl
;
788 fn
= DECL_STRUCT_FUNCTION (function
);
789 ob
= create_output_block (LTO_section_function_body
);
791 clear_line_info (ob
);
792 ob
->cgraph_node
= node
;
794 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
796 /* Set current_function_decl and cfun. */
797 current_function_decl
= function
;
800 /* Make string 0 be a NULL string. */
801 streamer_write_char_stream (ob
->string_stream
, 0);
803 streamer_write_record_start (ob
, LTO_function
);
805 output_struct_function_base (ob
, fn
);
807 /* Output the head of the arguments list. */
808 stream_write_tree (ob
, DECL_ARGUMENTS (function
), true);
810 /* Output all the SSA names used in the function. */
811 output_ssa_names (ob
, fn
);
813 /* Output any exception handling regions. */
814 output_eh_regions (ob
, fn
);
816 /* Output DECL_INITIAL for the function, which contains the tree of
818 stream_write_tree (ob
, DECL_INITIAL (function
), true);
820 /* We will renumber the statements. The code that does this uses
821 the same ordering that we use for serializing them so we can use
822 the same code on the other end and not have to write out the
823 statement numbers. We do not assign UIDs to PHIs here because
824 virtual PHIs get re-computed on-the-fly which would make numbers
826 set_gimple_stmt_max_uid (cfun
, 0);
829 gimple_stmt_iterator gsi
;
830 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
832 gimple stmt
= gsi_stmt (gsi
);
833 gimple_set_uid (stmt
, inc_gimple_stmt_max_uid (cfun
));
837 /* Output the code for the function. */
838 FOR_ALL_BB_FN (bb
, fn
)
839 output_bb (ob
, bb
, fn
);
841 /* The terminator for this function. */
842 streamer_write_record_start (ob
, LTO_null
);
846 /* Create a section to hold the pickled output of this function. */
847 produce_asm (ob
, function
);
849 destroy_output_block (ob
);
851 current_function_decl
= NULL
;
856 /* Used to pass data to trivally_defined_alias callback. */
859 varpool_node_set vset
;
863 /* Return true if alias pair P belongs to the set of cgraph nodes in
864 SET. If P is a an alias for a VAR_DECL, it can always be emitted.
865 However, for FUNCTION_DECL aliases, we should only output the pair
866 if it belongs to a function whose cgraph node is in SET.
867 Otherwise, the LTRANS phase will get into trouble when finalizing
868 aliases because the alias will refer to a function not defined in
869 the file processed by LTRANS. */
872 trivally_defined_alias (tree decl ATTRIBUTE_UNUSED
,
873 tree target
, void *data
)
875 struct sets
*set
= (struct sets
*) data
;
876 struct cgraph_node
*fnode
= NULL
;
877 struct varpool_node
*vnode
= NULL
;
879 fnode
= cgraph_node_for_asm (target
);
881 return cgraph_node_in_set_p (fnode
, set
->set
);
882 vnode
= varpool_node_for_asm (target
);
883 return vnode
&& varpool_node_in_set_p (vnode
, set
->vset
);
886 /* Return true if alias pair P should be output in the current
887 partition contains cgrpah nodes SET and varpool nodes VSET.
888 DEFINED is set of all aliases whose targets are defined in
891 Normal aliases are output when they are defined, while WEAKREF
892 aliases are output when they are used. */
895 output_alias_pair_p (alias_pair
*p
, symbol_alias_set_t
*defined
,
896 cgraph_node_set set
, varpool_node_set vset
)
898 struct cgraph_node
*node
;
899 struct varpool_node
*vnode
;
901 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (p
->decl
)))
903 if (TREE_CODE (p
->decl
) == VAR_DECL
)
905 vnode
= varpool_get_node (p
->decl
);
907 && referenced_from_this_partition_p (&vnode
->ref_list
, set
, vset
));
909 node
= cgraph_get_node (p
->decl
);
911 && (referenced_from_this_partition_p (&node
->ref_list
, set
, vset
)
912 || reachable_from_this_partition_p (node
, set
)));
915 return symbol_alias_set_contains (defined
, p
->decl
);
918 /* Output any unreferenced global symbol defined in SET, alias pairs
922 output_unreferenced_globals (cgraph_node_set set
, varpool_node_set vset
)
924 struct output_block
*ob
;
927 symbol_alias_set_t
*defined
;
933 ob
= create_output_block (LTO_section_static_initializer
);
934 ob
->cgraph_node
= NULL
;
936 clear_line_info (ob
);
938 /* Make string 0 be a NULL string. */
939 streamer_write_char_stream (ob
->string_stream
, 0);
941 /* We really need to propagate in both directoins:
942 for normal aliases we propagate from first defined alias to
943 all aliases defined based on it. For weakrefs we propagate in
944 the oposite direction. */
945 defined
= propagate_aliases_backward (trivally_defined_alias
, &setdata
);
947 /* Emit the alias pairs for the nodes in SET. */
948 FOR_EACH_VEC_ELT (alias_pair
, alias_pairs
, i
, p
)
949 if (output_alias_pair_p (p
, defined
, set
, vset
))
951 stream_write_tree (ob
, p
->decl
, true);
952 stream_write_tree (ob
, p
->target
, true);
954 symbol_alias_set_destroy (defined
);
956 streamer_write_record_start (ob
, LTO_null
);
958 produce_asm (ob
, NULL
);
959 destroy_output_block (ob
);
963 /* Emit toplevel asms. */
966 lto_output_toplevel_asms (void)
968 struct output_block
*ob
;
969 struct cgraph_asm_node
*can
;
971 struct lto_output_stream
*header_stream
;
972 struct lto_asm_header header
;
974 if (! cgraph_asm_nodes
)
977 ob
= create_output_block (LTO_section_asm
);
979 /* Make string 0 be a NULL string. */
980 streamer_write_char_stream (ob
->string_stream
, 0);
982 for (can
= cgraph_asm_nodes
; can
; can
= can
->next
)
984 streamer_write_string_cst (ob
, ob
->main_stream
, can
->asm_str
);
985 streamer_write_hwi (ob
, can
->order
);
988 streamer_write_string_cst (ob
, ob
->main_stream
, NULL_TREE
);
990 section_name
= lto_get_section_name (LTO_section_asm
, NULL
, NULL
);
991 lto_begin_section (section_name
, !flag_wpa
);
994 /* The entire header stream is computed here. */
995 memset (&header
, 0, sizeof (header
));
997 /* Write the header. */
998 header
.lto_header
.major_version
= LTO_major_version
;
999 header
.lto_header
.minor_version
= LTO_minor_version
;
1000 header
.lto_header
.section_type
= LTO_section_asm
;
1002 header
.main_size
= ob
->main_stream
->total_size
;
1003 header
.string_size
= ob
->string_stream
->total_size
;
1005 header_stream
= XCNEW (struct lto_output_stream
);
1006 lto_output_data_stream (header_stream
, &header
, sizeof (header
));
1007 lto_write_stream (header_stream
);
1008 free (header_stream
);
1010 /* Put all of the gimple and the string table out the asm file as a
1012 lto_write_stream (ob
->main_stream
);
1013 lto_write_stream (ob
->string_stream
);
1017 destroy_output_block (ob
);
1021 /* Copy the function body of NODE without deserializing. */
1024 copy_function (struct cgraph_node
*node
)
1026 tree function
= node
->decl
;
1027 struct lto_file_decl_data
*file_data
= node
->local
.lto_file_data
;
1028 struct lto_output_stream
*output_stream
= XCNEW (struct lto_output_stream
);
1031 const char *name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (function
));
1032 char *section_name
=
1033 lto_get_section_name (LTO_section_function_body
, name
, NULL
);
1035 struct lto_in_decl_state
*in_state
;
1036 struct lto_out_decl_state
*out_state
= lto_get_out_decl_state ();
1038 lto_begin_section (section_name
, !flag_wpa
);
1039 free (section_name
);
1041 /* We may have renamed the declaration, e.g., a static function. */
1042 name
= lto_get_decl_name_mapping (file_data
, name
);
1044 data
= lto_get_section_data (file_data
, LTO_section_function_body
,
1048 /* Do a bit copy of the function body. */
1049 lto_output_data_stream (output_stream
, data
, len
);
1050 lto_write_stream (output_stream
);
1054 lto_get_function_in_decl_state (node
->local
.lto_file_data
, function
);
1055 gcc_assert (in_state
);
1057 for (i
= 0; i
< LTO_N_DECL_STREAMS
; i
++)
1059 size_t n
= in_state
->streams
[i
].size
;
1060 tree
*trees
= in_state
->streams
[i
].trees
;
1061 struct lto_tree_ref_encoder
*encoder
= &(out_state
->streams
[i
]);
1063 /* The out state must have the same indices and the in state.
1064 So just copy the vector. All the encoders in the in state
1065 must be empty where we reach here. */
1066 gcc_assert (lto_tree_ref_encoder_size (encoder
) == 0);
1067 for (j
= 0; j
< n
; j
++)
1068 VEC_safe_push (tree
, heap
, encoder
->trees
, trees
[j
]);
1069 encoder
->next_index
= n
;
1072 lto_free_section_data (file_data
, LTO_section_function_body
, name
,
1074 free (output_stream
);
1079 /* Main entry point from the pass manager. */
1082 lto_output (cgraph_node_set set
, varpool_node_set vset
)
1084 struct cgraph_node
*node
;
1085 struct lto_out_decl_state
*decl_state
;
1086 #ifdef ENABLE_CHECKING
1087 bitmap output
= lto_bitmap_alloc ();
1090 lto_cgraph_encoder_t encoder
= lto_get_out_decl_state ()->cgraph_node_encoder
;
1092 /* Initialize the streamer. */
1093 lto_streamer_init ();
1095 n_nodes
= lto_cgraph_encoder_size (encoder
);
1096 /* Process only the functions with bodies. */
1097 for (i
= 0; i
< n_nodes
; i
++)
1099 node
= lto_cgraph_encoder_deref (encoder
, i
);
1100 if (lto_cgraph_encoder_encode_body_p (encoder
, node
)
1102 && !node
->thunk
.thunk_p
)
1104 #ifdef ENABLE_CHECKING
1105 gcc_assert (!bitmap_bit_p (output
, DECL_UID (node
->decl
)));
1106 bitmap_set_bit (output
, DECL_UID (node
->decl
));
1108 decl_state
= lto_new_out_decl_state ();
1109 lto_push_out_decl_state (decl_state
);
1110 if (gimple_has_body_p (node
->decl
))
1111 output_function (node
);
1113 copy_function (node
);
1114 gcc_assert (lto_get_out_decl_state () == decl_state
);
1115 lto_pop_out_decl_state ();
1116 lto_record_function_out_decl_state (node
->decl
, decl_state
);
1120 /* Emit the callgraph after emitting function bodies. This needs to
1121 be done now to make sure that all the statements in every function
1122 have been renumbered so that edges can be associated with call
1123 statements using the statement UIDs. */
1124 output_cgraph (set
, vset
);
1126 #ifdef ENABLE_CHECKING
1127 lto_bitmap_free (output
);
1131 struct ipa_opt_pass_d pass_ipa_lto_gimple_out
=
1135 "lto_gimple_out", /* name */
1136 gate_lto_out
, /* gate */
1140 0, /* static_pass_number */
1141 TV_IPA_LTO_GIMPLE_OUT
, /* tv_id */
1142 0, /* properties_required */
1143 0, /* properties_provided */
1144 0, /* properties_destroyed */
1145 0, /* todo_flags_start */
1146 0 /* todo_flags_finish */
1148 NULL
, /* generate_summary */
1149 lto_output
, /* write_summary */
1150 NULL
, /* read_summary */
1151 lto_output
, /* write_optimization_summary */
1152 NULL
, /* read_optimization_summary */
1153 NULL
, /* stmt_fixup */
1155 NULL
, /* function_transform */
1156 NULL
/* variable_transform */
1160 /* Write each node in encoded by ENCODER to OB, as well as those reachable
1161 from it and required for correct representation of its semantics.
1162 Each node in ENCODER must be a global declaration or a type. A node
1163 is written only once, even if it appears multiple times in the
1164 vector. Certain transitively-reachable nodes, such as those
1165 representing expressions, may be duplicated, but such nodes
1166 must not appear in ENCODER itself. */
1169 write_global_stream (struct output_block
*ob
,
1170 struct lto_tree_ref_encoder
*encoder
)
1174 const size_t size
= lto_tree_ref_encoder_size (encoder
);
1176 for (index
= 0; index
< size
; index
++)
1178 t
= lto_tree_ref_encoder_get_tree (encoder
, index
);
1179 if (!streamer_tree_cache_lookup (ob
->writer_cache
, t
, NULL
))
1180 stream_write_tree (ob
, t
, false);
1185 /* Write a sequence of indices into the globals vector corresponding
1186 to the trees in ENCODER. These are used by the reader to map the
1187 indices used to refer to global entities within function bodies to
1191 write_global_references (struct output_block
*ob
,
1192 struct lto_output_stream
*ref_stream
,
1193 struct lto_tree_ref_encoder
*encoder
)
1197 const uint32_t size
= lto_tree_ref_encoder_size (encoder
);
1199 /* Write size as 32-bit unsigned. */
1200 lto_output_data_stream (ref_stream
, &size
, sizeof (int32_t));
1202 for (index
= 0; index
< size
; index
++)
1206 t
= lto_tree_ref_encoder_get_tree (encoder
, index
);
1207 streamer_tree_cache_lookup (ob
->writer_cache
, t
, &slot_num
);
1208 gcc_assert (slot_num
!= (unsigned)-1);
1209 lto_output_data_stream (ref_stream
, &slot_num
, sizeof slot_num
);
1214 /* Write all the streams in an lto_out_decl_state STATE using
1215 output block OB and output stream OUT_STREAM. */
1218 lto_output_decl_state_streams (struct output_block
*ob
,
1219 struct lto_out_decl_state
*state
)
1223 for (i
= 0; i
< LTO_N_DECL_STREAMS
; i
++)
1224 write_global_stream (ob
, &state
->streams
[i
]);
1228 /* Write all the references in an lto_out_decl_state STATE using
1229 output block OB and output stream OUT_STREAM. */
1232 lto_output_decl_state_refs (struct output_block
*ob
,
1233 struct lto_output_stream
*out_stream
,
1234 struct lto_out_decl_state
*state
)
1240 /* Write reference to FUNCTION_DECL. If there is not function,
1241 write reference to void_type_node. */
1242 decl
= (state
->fn_decl
) ? state
->fn_decl
: void_type_node
;
1243 streamer_tree_cache_lookup (ob
->writer_cache
, decl
, &ref
);
1244 gcc_assert (ref
!= (unsigned)-1);
1245 lto_output_data_stream (out_stream
, &ref
, sizeof (uint32_t));
1247 for (i
= 0; i
< LTO_N_DECL_STREAMS
; i
++)
1248 write_global_references (ob
, out_stream
, &state
->streams
[i
]);
1252 /* Return the written size of STATE. */
1255 lto_out_decl_state_written_size (struct lto_out_decl_state
*state
)
1260 size
= sizeof (int32_t); /* fn_ref. */
1261 for (i
= 0; i
< LTO_N_DECL_STREAMS
; i
++)
1263 size
+= sizeof (int32_t); /* vector size. */
1264 size
+= (lto_tree_ref_encoder_size (&state
->streams
[i
])
1265 * sizeof (int32_t));
1271 /* Write symbol T into STREAM in CACHE. SEEN specifies symbols we wrote
1275 write_symbol (struct streamer_tree_cache_d
*cache
,
1276 struct lto_output_stream
*stream
,
1277 tree t
, struct pointer_set_t
*seen
, bool alias
)
1280 enum gcc_plugin_symbol_kind kind
;
1281 enum gcc_plugin_symbol_visibility visibility
;
1283 unsigned HOST_WIDEST_INT size
;
1287 /* None of the following kinds of symbols are needed in the
1289 if (!TREE_PUBLIC (t
)
1290 || is_builtin_fn (t
)
1291 || DECL_ABSTRACT (t
)
1292 || TREE_CODE (t
) == RESULT_DECL
)
1295 gcc_assert (TREE_CODE (t
) == VAR_DECL
1296 || TREE_CODE (t
) == FUNCTION_DECL
);
1298 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (t
));
1300 /* This behaves like assemble_name_raw in varasm.c, performing the
1301 same name manipulations that ASM_OUTPUT_LABELREF does. */
1302 name
= IDENTIFIER_POINTER ((*targetm
.asm_out
.mangle_assembler_name
) (name
));
1304 if (pointer_set_contains (seen
, name
))
1306 pointer_set_insert (seen
, name
);
1308 streamer_tree_cache_lookup (cache
, t
, &slot_num
);
1309 gcc_assert (slot_num
!= (unsigned)-1);
1311 if (DECL_EXTERNAL (t
))
1314 kind
= GCCPK_WEAKUNDEF
;
1321 kind
= GCCPK_WEAKDEF
;
1322 else if (DECL_COMMON (t
))
1323 kind
= GCCPK_COMMON
;
1327 /* When something is defined, it should have node attached. */
1328 gcc_assert (alias
|| TREE_CODE (t
) != VAR_DECL
1329 || varpool_get_node (t
)->finalized
);
1330 gcc_assert (alias
|| TREE_CODE (t
) != FUNCTION_DECL
1331 || (cgraph_get_node (t
)
1332 && cgraph_get_node (t
)->analyzed
));
1335 /* Imitate what default_elf_asm_output_external do.
1336 When symbol is external, we need to output it with DEFAULT visibility
1337 when compiling with -fvisibility=default, while with HIDDEN visibility
1338 when symbol has attribute (visibility("hidden")) specified.
1339 targetm.binds_local_p check DECL_VISIBILITY_SPECIFIED and gets this
1342 if (DECL_EXTERNAL (t
)
1343 && !targetm
.binds_local_p (t
))
1344 visibility
= GCCPV_DEFAULT
;
1346 switch (DECL_VISIBILITY(t
))
1348 case VISIBILITY_DEFAULT
:
1349 visibility
= GCCPV_DEFAULT
;
1351 case VISIBILITY_PROTECTED
:
1352 visibility
= GCCPV_PROTECTED
;
1354 case VISIBILITY_HIDDEN
:
1355 visibility
= GCCPV_HIDDEN
;
1357 case VISIBILITY_INTERNAL
:
1358 visibility
= GCCPV_INTERNAL
;
1362 if (kind
== GCCPK_COMMON
1363 && DECL_SIZE_UNIT (t
)
1364 && TREE_CODE (DECL_SIZE_UNIT (t
)) == INTEGER_CST
)
1365 size
= TREE_INT_CST_LOW (DECL_SIZE_UNIT (t
));
1369 if (DECL_ONE_ONLY (t
))
1370 comdat
= IDENTIFIER_POINTER (DECL_COMDAT_GROUP (t
));
1374 lto_output_data_stream (stream
, name
, strlen (name
) + 1);
1375 lto_output_data_stream (stream
, comdat
, strlen (comdat
) + 1);
1376 c
= (unsigned char) kind
;
1377 lto_output_data_stream (stream
, &c
, 1);
1378 c
= (unsigned char) visibility
;
1379 lto_output_data_stream (stream
, &c
, 1);
1380 lto_output_data_stream (stream
, &size
, 8);
1381 lto_output_data_stream (stream
, &slot_num
, 4);
1385 /* Write an IL symbol table to OB.
1386 SET and VSET are cgraph/varpool node sets we are outputting. */
1389 produce_symtab (struct output_block
*ob
,
1390 cgraph_node_set set
, varpool_node_set vset
)
1392 struct streamer_tree_cache_d
*cache
= ob
->writer_cache
;
1393 char *section_name
= lto_get_section_name (LTO_section_symtab
, NULL
, NULL
);
1394 struct pointer_set_t
*seen
;
1395 struct cgraph_node
*node
;
1396 struct varpool_node
*vnode
;
1397 struct lto_output_stream stream
;
1398 lto_varpool_encoder_t varpool_encoder
= ob
->decl_state
->varpool_node_encoder
;
1399 lto_cgraph_encoder_t encoder
= ob
->decl_state
->cgraph_node_encoder
;
1402 struct sets setdata
;
1403 symbol_alias_set_t
*defined
;
1406 setdata
.vset
= vset
;
1408 lto_begin_section (section_name
, false);
1409 free (section_name
);
1411 seen
= pointer_set_create ();
1412 memset (&stream
, 0, sizeof (stream
));
1414 /* Write all functions.
1415 First write all defined functions and then write all used functions.
1416 This is done so only to handle duplicated symbols in cgraph. */
1417 for (i
= 0; i
< lto_cgraph_encoder_size (encoder
); i
++)
1419 node
= lto_cgraph_encoder_deref (encoder
, i
);
1420 if (DECL_EXTERNAL (node
->decl
))
1422 if (DECL_COMDAT (node
->decl
)
1423 && cgraph_comdat_can_be_unshared_p (node
))
1425 if ((node
->alias
&& !node
->thunk
.alias
) || node
->global
.inlined_to
)
1427 write_symbol (cache
, &stream
, node
->decl
, seen
, false);
1429 for (i
= 0; i
< lto_cgraph_encoder_size (encoder
); i
++)
1431 node
= lto_cgraph_encoder_deref (encoder
, i
);
1432 if (!DECL_EXTERNAL (node
->decl
))
1434 /* We keep around unused extern inlines in order to be able to inline
1435 them indirectly or via vtables. Do not output them to symbol
1436 table: they end up being undefined and just consume space. */
1437 if (!node
->address_taken
&& !node
->callers
)
1439 if (DECL_COMDAT (node
->decl
)
1440 && cgraph_comdat_can_be_unshared_p (node
))
1442 if ((node
->alias
&& !node
->thunk
.alias
) || node
->global
.inlined_to
)
1444 write_symbol (cache
, &stream
, node
->decl
, seen
, false);
1447 /* Write all variables. */
1448 for (i
= 0; i
< lto_varpool_encoder_size (varpool_encoder
); i
++)
1450 vnode
= lto_varpool_encoder_deref (varpool_encoder
, i
);
1451 if (DECL_EXTERNAL (vnode
->decl
))
1453 /* COMDAT virtual tables can be unshared. Do not declare them
1454 in the LTO symbol table to prevent linker from forcing them
1456 if (DECL_COMDAT (vnode
->decl
)
1457 && !vnode
->force_output
1459 && DECL_VIRTUAL_P (vnode
->decl
))
1461 if (vnode
->alias
&& !vnode
->alias_of
)
1463 write_symbol (cache
, &stream
, vnode
->decl
, seen
, false);
1465 for (i
= 0; i
< lto_varpool_encoder_size (varpool_encoder
); i
++)
1467 vnode
= lto_varpool_encoder_deref (varpool_encoder
, i
);
1468 if (!DECL_EXTERNAL (vnode
->decl
))
1470 if (DECL_COMDAT (vnode
->decl
)
1471 && !vnode
->force_output
1473 && DECL_VIRTUAL_P (vnode
->decl
))
1475 if (vnode
->alias
&& !vnode
->alias_of
)
1477 write_symbol (cache
, &stream
, vnode
->decl
, seen
, false);
1480 /* Write all aliases. */
1481 defined
= propagate_aliases_backward (trivally_defined_alias
, &setdata
);
1482 FOR_EACH_VEC_ELT (alias_pair
, alias_pairs
, i
, p
)
1483 if (output_alias_pair_p (p
, defined
, set
, vset
))
1484 write_symbol (cache
, &stream
, p
->decl
, seen
, true);
1485 symbol_alias_set_destroy (defined
);
1487 lto_write_stream (&stream
);
1488 pointer_set_destroy (seen
);
1494 /* This pass is run after all of the functions are serialized and all
1495 of the IPA passes have written their serialized forms. This pass
1496 causes the vector of all of the global decls and types used from
1497 this file to be written in to a section that can then be read in to
1498 recover these on other side. */
1501 produce_asm_for_decls (cgraph_node_set set
, varpool_node_set vset
)
1503 struct lto_out_decl_state
*out_state
;
1504 struct lto_out_decl_state
*fn_out_state
;
1505 struct lto_decl_header header
;
1507 struct output_block
*ob
;
1508 struct lto_output_stream
*header_stream
, *decl_state_stream
;
1509 unsigned idx
, num_fns
;
1510 size_t decl_state_size
;
1511 int32_t num_decl_states
;
1513 ob
= create_output_block (LTO_section_decls
);
1516 /* Write out unreferenced globals, alias pairs and labels. We defer
1517 doing this until now so that we can write out only what is
1519 output_unreferenced_globals (set
, vset
);
1521 memset (&header
, 0, sizeof (struct lto_decl_header
));
1523 section_name
= lto_get_section_name (LTO_section_decls
, NULL
, NULL
);
1524 lto_begin_section (section_name
, !flag_wpa
);
1525 free (section_name
);
1527 /* Make string 0 be a NULL string. */
1528 streamer_write_char_stream (ob
->string_stream
, 0);
1530 /* Write the global symbols. */
1531 out_state
= lto_get_out_decl_state ();
1532 num_fns
= VEC_length (lto_out_decl_state_ptr
, lto_function_decl_states
);
1533 lto_output_decl_state_streams (ob
, out_state
);
1534 for (idx
= 0; idx
< num_fns
; idx
++)
1537 VEC_index (lto_out_decl_state_ptr
, lto_function_decl_states
, idx
);
1538 lto_output_decl_state_streams (ob
, fn_out_state
);
1541 header
.lto_header
.major_version
= LTO_major_version
;
1542 header
.lto_header
.minor_version
= LTO_minor_version
;
1543 header
.lto_header
.section_type
= LTO_section_decls
;
1545 /* Currently not used. This field would allow us to preallocate
1546 the globals vector, so that it need not be resized as it is extended. */
1547 header
.num_nodes
= -1;
1549 /* Compute the total size of all decl out states. */
1550 decl_state_size
= sizeof (int32_t);
1551 decl_state_size
+= lto_out_decl_state_written_size (out_state
);
1552 for (idx
= 0; idx
< num_fns
; idx
++)
1555 VEC_index (lto_out_decl_state_ptr
, lto_function_decl_states
, idx
);
1556 decl_state_size
+= lto_out_decl_state_written_size (fn_out_state
);
1558 header
.decl_state_size
= decl_state_size
;
1560 header
.main_size
= ob
->main_stream
->total_size
;
1561 header
.string_size
= ob
->string_stream
->total_size
;
1563 header_stream
= XCNEW (struct lto_output_stream
);
1564 lto_output_data_stream (header_stream
, &header
, sizeof header
);
1565 lto_write_stream (header_stream
);
1566 free (header_stream
);
1568 /* Write the main out-decl state, followed by out-decl states of
1570 decl_state_stream
= ((struct lto_output_stream
*)
1571 xcalloc (1, sizeof (struct lto_output_stream
)));
1572 num_decl_states
= num_fns
+ 1;
1573 lto_output_data_stream (decl_state_stream
, &num_decl_states
,
1574 sizeof (num_decl_states
));
1575 lto_output_decl_state_refs (ob
, decl_state_stream
, out_state
);
1576 for (idx
= 0; idx
< num_fns
; idx
++)
1579 VEC_index (lto_out_decl_state_ptr
, lto_function_decl_states
, idx
);
1580 lto_output_decl_state_refs (ob
, decl_state_stream
, fn_out_state
);
1582 lto_write_stream (decl_state_stream
);
1583 free(decl_state_stream
);
1585 lto_write_stream (ob
->main_stream
);
1586 lto_write_stream (ob
->string_stream
);
1590 /* Write the symbol table. It is used by linker to determine dependencies
1591 and thus we can skip it for WPA. */
1593 produce_symtab (ob
, set
, vset
);
1595 /* Write command line opts. */
1596 lto_write_options ();
1598 /* Deallocate memory and clean up. */
1599 for (idx
= 0; idx
< num_fns
; idx
++)
1602 VEC_index (lto_out_decl_state_ptr
, lto_function_decl_states
, idx
);
1603 lto_delete_out_decl_state (fn_out_state
);
1605 lto_cgraph_encoder_delete (ob
->decl_state
->cgraph_node_encoder
);
1606 lto_varpool_encoder_delete (ob
->decl_state
->varpool_node_encoder
);
1607 VEC_free (lto_out_decl_state_ptr
, heap
, lto_function_decl_states
);
1608 lto_function_decl_states
= NULL
;
1609 destroy_output_block (ob
);
1613 struct ipa_opt_pass_d pass_ipa_lto_finish_out
=
1617 "lto_decls_out", /* name */
1618 gate_lto_out
, /* gate */
1622 0, /* static_pass_number */
1623 TV_IPA_LTO_DECL_OUT
, /* tv_id */
1624 0, /* properties_required */
1625 0, /* properties_provided */
1626 0, /* properties_destroyed */
1627 0, /* todo_flags_start */
1628 0 /* todo_flags_finish */
1630 NULL
, /* generate_summary */
1631 produce_asm_for_decls
, /* write_summary */
1632 NULL
, /* read_summary */
1633 produce_asm_for_decls
, /* write_optimization_summary */
1634 NULL
, /* read_optimization_summary */
1635 NULL
, /* stmt_fixup */
1637 NULL
, /* function_transform */
1638 NULL
/* variable_transform */