1 /* Write and read the cgraph to the memory mapped representation of a
4 Copyright 2009, 2010 Free Software Foundation, Inc.
5 Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
34 #include "langhooks.h"
35 #include "basic-block.h"
36 #include "tree-flow.h"
40 #include "diagnostic-core.h"
45 #include "pointer-set.h"
46 #include "lto-streamer.h"
49 static void output_varpool (cgraph_node_set
, varpool_node_set
);
50 static void output_cgraph_opt_summary (void);
51 static void input_cgraph_opt_summary (VEC (cgraph_node_ptr
, heap
) * nodes
);
54 /* Cgraph streaming is organized as set of record whose type
55 is indicated by a tag. */
58 /* Must leave 0 for the stopper. */
60 /* Cgraph node without body available. */
61 LTO_cgraph_unavail_node
= 1,
62 /* Cgraph node with function body. */
63 LTO_cgraph_analyzed_node
,
66 LTO_cgraph_indirect_edge
69 /* Create a new cgraph encoder. */
72 lto_cgraph_encoder_new (void)
74 lto_cgraph_encoder_t encoder
= XCNEW (struct lto_cgraph_encoder_d
);
75 encoder
->map
= pointer_map_create ();
76 encoder
->nodes
= NULL
;
77 encoder
->body
= pointer_set_create ();
82 /* Delete ENCODER and its components. */
85 lto_cgraph_encoder_delete (lto_cgraph_encoder_t encoder
)
87 VEC_free (cgraph_node_ptr
, heap
, encoder
->nodes
);
88 pointer_map_destroy (encoder
->map
);
89 pointer_set_destroy (encoder
->body
);
94 /* Return the existing reference number of NODE in the cgraph encoder in
95 output block OB. Assign a new reference if this is the first time
99 lto_cgraph_encoder_encode (lto_cgraph_encoder_t encoder
,
100 struct cgraph_node
*node
)
105 slot
= pointer_map_contains (encoder
->map
, node
);
108 ref
= VEC_length (cgraph_node_ptr
, encoder
->nodes
);
109 slot
= pointer_map_insert (encoder
->map
, node
);
110 *slot
= (void *) (intptr_t) ref
;
111 VEC_safe_push (cgraph_node_ptr
, heap
, encoder
->nodes
, node
);
114 ref
= (int) (intptr_t) *slot
;
119 #define LCC_NOT_FOUND (-1)
121 /* Look up NODE in encoder. Return NODE's reference if it has been encoded
122 or LCC_NOT_FOUND if it is not there. */
125 lto_cgraph_encoder_lookup (lto_cgraph_encoder_t encoder
,
126 struct cgraph_node
*node
)
128 void **slot
= pointer_map_contains (encoder
->map
, node
);
129 return (slot
? (int) (intptr_t) *slot
: LCC_NOT_FOUND
);
133 /* Return the cgraph node corresponding to REF using ENCODER. */
136 lto_cgraph_encoder_deref (lto_cgraph_encoder_t encoder
, int ref
)
138 if (ref
== LCC_NOT_FOUND
)
141 return VEC_index (cgraph_node_ptr
, encoder
->nodes
, ref
);
145 /* Return TRUE if we should encode initializer of NODE (if any). */
148 lto_cgraph_encoder_encode_body_p (lto_cgraph_encoder_t encoder
,
149 struct cgraph_node
*node
)
151 return pointer_set_contains (encoder
->body
, node
);
154 /* Return TRUE if we should encode body of NODE (if any). */
157 lto_set_cgraph_encoder_encode_body (lto_cgraph_encoder_t encoder
,
158 struct cgraph_node
*node
)
160 pointer_set_insert (encoder
->body
, node
);
163 /* Create a new varpool encoder. */
165 lto_varpool_encoder_t
166 lto_varpool_encoder_new (void)
168 lto_varpool_encoder_t encoder
= XCNEW (struct lto_varpool_encoder_d
);
169 encoder
->map
= pointer_map_create ();
170 encoder
->initializer
= pointer_set_create ();
171 encoder
->nodes
= NULL
;
176 /* Delete ENCODER and its components. */
179 lto_varpool_encoder_delete (lto_varpool_encoder_t encoder
)
181 VEC_free (varpool_node_ptr
, heap
, encoder
->nodes
);
182 pointer_map_destroy (encoder
->map
);
183 pointer_set_destroy (encoder
->initializer
);
188 /* Return the existing reference number of NODE in the varpool encoder in
189 output block OB. Assign a new reference if this is the first time
193 lto_varpool_encoder_encode (lto_varpool_encoder_t encoder
,
194 struct varpool_node
*node
)
199 slot
= pointer_map_contains (encoder
->map
, node
);
202 ref
= VEC_length (varpool_node_ptr
, encoder
->nodes
);
203 slot
= pointer_map_insert (encoder
->map
, node
);
204 *slot
= (void *) (intptr_t) ref
;
205 VEC_safe_push (varpool_node_ptr
, heap
, encoder
->nodes
, node
);
208 ref
= (int) (intptr_t) *slot
;
213 /* Look up NODE in encoder. Return NODE's reference if it has been encoded
214 or LCC_NOT_FOUND if it is not there. */
217 lto_varpool_encoder_lookup (lto_varpool_encoder_t encoder
,
218 struct varpool_node
*node
)
220 void **slot
= pointer_map_contains (encoder
->map
, node
);
221 return (slot
? (int) (intptr_t) *slot
: LCC_NOT_FOUND
);
225 /* Return the varpool node corresponding to REF using ENCODER. */
227 struct varpool_node
*
228 lto_varpool_encoder_deref (lto_varpool_encoder_t encoder
, int ref
)
230 if (ref
== LCC_NOT_FOUND
)
233 return VEC_index (varpool_node_ptr
, encoder
->nodes
, ref
);
237 /* Return TRUE if we should encode initializer of NODE (if any). */
240 lto_varpool_encoder_encode_initializer_p (lto_varpool_encoder_t encoder
,
241 struct varpool_node
*node
)
243 return pointer_set_contains (encoder
->initializer
, node
);
246 /* Return TRUE if we should encode initializer of NODE (if any). */
249 lto_set_varpool_encoder_encode_initializer (lto_varpool_encoder_t encoder
,
250 struct varpool_node
*node
)
252 pointer_set_insert (encoder
->initializer
, node
);
255 /* Output the cgraph EDGE to OB using ENCODER. */
258 lto_output_edge (struct lto_simple_output_block
*ob
, struct cgraph_edge
*edge
,
259 lto_cgraph_encoder_t encoder
)
265 if (edge
->indirect_unknown_callee
)
266 lto_output_uleb128_stream (ob
->main_stream
, LTO_cgraph_indirect_edge
);
268 lto_output_uleb128_stream (ob
->main_stream
, LTO_cgraph_edge
);
270 ref
= lto_cgraph_encoder_lookup (encoder
, edge
->caller
);
271 gcc_assert (ref
!= LCC_NOT_FOUND
);
272 lto_output_sleb128_stream (ob
->main_stream
, ref
);
274 if (!edge
->indirect_unknown_callee
)
276 ref
= lto_cgraph_encoder_lookup (encoder
, edge
->callee
);
277 gcc_assert (ref
!= LCC_NOT_FOUND
);
278 lto_output_sleb128_stream (ob
->main_stream
, ref
);
281 lto_output_sleb128_stream (ob
->main_stream
, edge
->count
);
283 bp
= bitpack_create (ob
->main_stream
);
284 uid
= flag_wpa
? edge
->lto_stmt_uid
: gimple_uid (edge
->call_stmt
);
285 bp_pack_value (&bp
, uid
, HOST_BITS_PER_INT
);
286 bp_pack_value (&bp
, edge
->inline_failed
, HOST_BITS_PER_INT
);
287 bp_pack_value (&bp
, edge
->frequency
, HOST_BITS_PER_INT
);
288 bp_pack_value (&bp
, edge
->loop_nest
, 30);
289 bp_pack_value (&bp
, edge
->indirect_inlining_edge
, 1);
290 bp_pack_value (&bp
, edge
->call_stmt_cannot_inline_p
, 1);
291 bp_pack_value (&bp
, edge
->can_throw_external
, 1);
292 if (edge
->indirect_unknown_callee
)
294 int flags
= edge
->indirect_info
->ecf_flags
;
295 bp_pack_value (&bp
, (flags
& ECF_CONST
) != 0, 1);
296 bp_pack_value (&bp
, (flags
& ECF_PURE
) != 0, 1);
297 bp_pack_value (&bp
, (flags
& ECF_NORETURN
) != 0, 1);
298 bp_pack_value (&bp
, (flags
& ECF_MALLOC
) != 0, 1);
299 bp_pack_value (&bp
, (flags
& ECF_NOTHROW
) != 0, 1);
300 bp_pack_value (&bp
, (flags
& ECF_RETURNS_TWICE
) != 0, 1);
301 /* Flags that should not appear on indirect calls. */
302 gcc_assert (!(flags
& (ECF_LOOPING_CONST_OR_PURE
307 lto_output_bitpack (&bp
);
310 /* Return if LIST contain references from other partitions. */
313 referenced_from_other_partition_p (struct ipa_ref_list
*list
, cgraph_node_set set
,
314 varpool_node_set vset
)
318 for (i
= 0; ipa_ref_list_refering_iterate (list
, i
, ref
); i
++)
320 if (ref
->refering_type
== IPA_REF_CGRAPH
)
322 if (!cgraph_node_in_set_p (ipa_ref_refering_node (ref
), set
))
327 if (!varpool_node_in_set_p (ipa_ref_refering_varpool_node (ref
),
335 /* Return true when node is reachable from other partition. */
338 reachable_from_other_partition_p (struct cgraph_node
*node
, cgraph_node_set set
)
340 struct cgraph_edge
*e
;
343 if (node
->global
.inlined_to
)
345 for (e
= node
->callers
; e
; e
= e
->next_caller
)
346 if (!cgraph_node_in_set_p (e
->caller
, set
))
351 /* Return if LIST contain references from other partitions. */
354 referenced_from_this_partition_p (struct ipa_ref_list
*list
, cgraph_node_set set
,
355 varpool_node_set vset
)
359 for (i
= 0; ipa_ref_list_refering_iterate (list
, i
, ref
); i
++)
361 if (ref
->refering_type
== IPA_REF_CGRAPH
)
363 if (cgraph_node_in_set_p (ipa_ref_refering_node (ref
), set
))
368 if (varpool_node_in_set_p (ipa_ref_refering_varpool_node (ref
),
376 /* Return true when node is reachable from other partition. */
379 reachable_from_this_partition_p (struct cgraph_node
*node
, cgraph_node_set set
)
381 struct cgraph_edge
*e
;
384 if (node
->global
.inlined_to
)
386 for (e
= node
->callers
; e
; e
= e
->next_caller
)
387 if (cgraph_node_in_set_p (e
->caller
, set
))
392 /* Output the cgraph NODE to OB. ENCODER is used to find the
393 reference number of NODE->inlined_to. SET is the set of nodes we
394 are writing to the current file. If NODE is not in SET, then NODE
395 is a boundary of a cgraph_node_set and we pretend NODE just has a
396 decl and no callees. WRITTEN_DECLS is the set of FUNCTION_DECLs
397 that have had their callgraph node written so far. This is used to
398 determine if NODE is a clone of a previously written node. */
401 lto_output_node (struct lto_simple_output_block
*ob
, struct cgraph_node
*node
,
402 lto_cgraph_encoder_t encoder
, cgraph_node_set set
,
403 varpool_node_set vset
)
409 bool in_other_partition
= false;
410 struct cgraph_node
*clone_of
;
412 boundary_p
= !cgraph_node_in_set_p (node
, set
);
414 if (node
->analyzed
&& !boundary_p
)
415 tag
= LTO_cgraph_analyzed_node
;
417 tag
= LTO_cgraph_unavail_node
;
419 lto_output_uleb128_stream (ob
->main_stream
, tag
);
421 /* In WPA mode, we only output part of the call-graph. Also, we
422 fake cgraph node attributes. There are two cases that we care.
424 Boundary nodes: There are nodes that are not part of SET but are
425 called from within SET. We artificially make them look like
426 externally visible nodes with no function body.
428 Cherry-picked nodes: These are nodes we pulled from other
429 translation units into SET during IPA-inlining. We make them as
430 local static nodes to prevent clashes with other local statics. */
431 if (boundary_p
&& node
->analyzed
)
433 /* Inline clones can not be part of boundary.
434 gcc_assert (!node->global.inlined_to);
436 FIXME: At the moment they can be, when partition contains an inline
437 clone that is clone of inline clone from outside partition. We can
438 reshape the clone tree and make other tree to be the root, but it
439 needs a bit extra work and will be promplty done by cgraph_remove_node
440 after reading back. */
441 in_other_partition
= 1;
444 clone_of
= node
->clone_of
;
446 && (ref
= lto_cgraph_encoder_lookup (encoder
, node
->clone_of
)) == LCC_NOT_FOUND
)
447 if (clone_of
->prev_sibling_clone
)
448 clone_of
= clone_of
->prev_sibling_clone
;
450 clone_of
= clone_of
->clone_of
;
452 lto_output_sleb128_stream (ob
->main_stream
, LCC_NOT_FOUND
);
454 lto_output_sleb128_stream (ob
->main_stream
, ref
);
457 lto_output_fn_decl_index (ob
->decl_state
, ob
->main_stream
, node
->decl
);
458 lto_output_sleb128_stream (ob
->main_stream
, node
->count
);
460 if (tag
== LTO_cgraph_analyzed_node
)
462 lto_output_sleb128_stream (ob
->main_stream
,
463 node
->local
.inline_summary
.estimated_self_stack_size
);
464 lto_output_sleb128_stream (ob
->main_stream
,
465 node
->local
.inline_summary
.self_size
);
466 lto_output_sleb128_stream (ob
->main_stream
,
467 node
->local
.inline_summary
.size_inlining_benefit
);
468 lto_output_sleb128_stream (ob
->main_stream
,
469 node
->local
.inline_summary
.self_time
);
470 lto_output_sleb128_stream (ob
->main_stream
,
471 node
->local
.inline_summary
.time_inlining_benefit
);
472 if (node
->global
.inlined_to
)
474 ref
= lto_cgraph_encoder_lookup (encoder
, node
->global
.inlined_to
);
475 gcc_assert (ref
!= LCC_NOT_FOUND
);
480 lto_output_sleb128_stream (ob
->main_stream
, ref
);
483 if (node
->same_comdat_group
&& !boundary_p
)
485 ref
= lto_cgraph_encoder_lookup (encoder
, node
->same_comdat_group
);
486 gcc_assert (ref
!= LCC_NOT_FOUND
);
490 lto_output_sleb128_stream (ob
->main_stream
, ref
);
492 bp
= bitpack_create (ob
->main_stream
);
493 bp_pack_value (&bp
, node
->local
.local
, 1);
494 bp_pack_value (&bp
, node
->local
.externally_visible
, 1);
495 bp_pack_value (&bp
, node
->local
.finalized
, 1);
496 bp_pack_value (&bp
, node
->local
.inlinable
, 1);
497 bp_pack_value (&bp
, node
->local
.versionable
, 1);
498 bp_pack_value (&bp
, node
->local
.disregard_inline_limits
, 1);
499 bp_pack_value (&bp
, node
->local
.redefined_extern_inline
, 1);
500 bp_pack_value (&bp
, node
->local
.vtable_method
, 1);
501 bp_pack_value (&bp
, node
->needed
, 1);
502 bp_pack_value (&bp
, node
->address_taken
, 1);
503 bp_pack_value (&bp
, node
->abstract_and_needed
, 1);
504 bp_pack_value (&bp
, tag
== LTO_cgraph_analyzed_node
505 && !DECL_EXTERNAL (node
->decl
)
506 && (reachable_from_other_partition_p (node
, set
)
507 || referenced_from_other_partition_p (&node
->ref_list
, set
, vset
)), 1);
508 bp_pack_value (&bp
, node
->lowered
, 1);
509 bp_pack_value (&bp
, in_other_partition
, 1);
510 bp_pack_value (&bp
, node
->alias
, 1);
511 bp_pack_value (&bp
, node
->finalized_by_frontend
, 1);
512 bp_pack_value (&bp
, node
->frequency
, 2);
513 lto_output_bitpack (&bp
);
517 struct cgraph_node
*alias
;
518 unsigned long alias_count
= 1;
519 for (alias
= node
->same_body
; alias
->next
; alias
= alias
->next
)
521 lto_output_uleb128_stream (ob
->main_stream
, alias_count
);
524 lto_output_fn_decl_index (ob
->decl_state
, ob
->main_stream
,
526 if (alias
->thunk
.thunk_p
)
528 lto_output_uleb128_stream
530 1 + (alias
->thunk
.this_adjusting
!= 0) * 2
531 + (alias
->thunk
.virtual_offset_p
!= 0) * 4);
532 lto_output_uleb128_stream (ob
->main_stream
,
533 alias
->thunk
.fixed_offset
);
534 lto_output_uleb128_stream (ob
->main_stream
,
535 alias
->thunk
.virtual_value
);
536 lto_output_fn_decl_index (ob
->decl_state
, ob
->main_stream
,
541 lto_output_uleb128_stream (ob
->main_stream
, 0);
542 lto_output_fn_decl_index (ob
->decl_state
, ob
->main_stream
,
545 alias
= alias
->previous
;
550 lto_output_uleb128_stream (ob
->main_stream
, 0);
553 /* Output the varpool NODE to OB.
554 If NODE is not in SET, then NODE is a boundary. */
557 lto_output_varpool_node (struct lto_simple_output_block
*ob
, struct varpool_node
*node
,
558 lto_varpool_encoder_t varpool_encoder
,
559 cgraph_node_set set
, varpool_node_set vset
)
561 bool boundary_p
= !varpool_node_in_set_p (node
, vset
) && node
->analyzed
;
563 struct varpool_node
*alias
;
567 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, node
->decl
);
568 bp
= bitpack_create (ob
->main_stream
);
569 bp_pack_value (&bp
, node
->externally_visible
, 1);
570 bp_pack_value (&bp
, node
->force_output
, 1);
571 bp_pack_value (&bp
, node
->finalized
, 1);
572 bp_pack_value (&bp
, node
->alias
, 1);
573 gcc_assert (!node
->alias
|| !node
->extra_name
);
574 gcc_assert (node
->finalized
|| !node
->analyzed
);
575 gcc_assert (node
->needed
);
576 /* Constant pool initializers can be de-unified into individual ltrans units.
577 FIXME: Alternatively at -Os we may want to avoid generating for them the local
578 labels and share them across LTRANS partitions. */
579 if (DECL_IN_CONSTANT_POOL (node
->decl
))
581 bp_pack_value (&bp
, 0, 1); /* used_from_other_parition. */
582 bp_pack_value (&bp
, 0, 1); /* in_other_partition. */
586 bp_pack_value (&bp
, node
->analyzed
587 && referenced_from_other_partition_p (&node
->ref_list
,
589 bp_pack_value (&bp
, boundary_p
, 1); /* in_other_partition. */
591 /* Also emit any extra name aliases. */
592 for (alias
= node
->extra_name
; alias
; alias
= alias
->next
)
594 bp_pack_value (&bp
, count
!= 0, 1);
595 lto_output_bitpack (&bp
);
596 if (node
->same_comdat_group
&& !boundary_p
)
598 ref
= lto_varpool_encoder_lookup (varpool_encoder
, node
->same_comdat_group
);
599 gcc_assert (ref
!= LCC_NOT_FOUND
);
603 lto_output_sleb128_stream (ob
->main_stream
, ref
);
607 lto_output_uleb128_stream (ob
->main_stream
, count
);
608 for (alias
= node
->extra_name
; alias
; alias
= alias
->next
)
609 lto_output_var_decl_index (ob
->decl_state
, ob
->main_stream
, alias
->decl
);
613 /* Output the varpool NODE to OB.
614 If NODE is not in SET, then NODE is a boundary. */
617 lto_output_ref (struct lto_simple_output_block
*ob
, struct ipa_ref
*ref
,
618 lto_cgraph_encoder_t encoder
,
619 lto_varpool_encoder_t varpool_encoder
)
622 bp
= bitpack_create (ob
->main_stream
);
623 bp_pack_value (&bp
, ref
->refered_type
, 1);
624 bp_pack_value (&bp
, ref
->use
, 2);
625 lto_output_bitpack (&bp
);
626 if (ref
->refered_type
== IPA_REF_CGRAPH
)
628 int nref
= lto_cgraph_encoder_lookup (encoder
, ipa_ref_node (ref
));
629 gcc_assert (nref
!= LCC_NOT_FOUND
);
630 lto_output_sleb128_stream (ob
->main_stream
, nref
);
634 int nref
= lto_varpool_encoder_lookup (varpool_encoder
,
635 ipa_ref_varpool_node (ref
));
636 gcc_assert (nref
!= LCC_NOT_FOUND
);
637 lto_output_sleb128_stream (ob
->main_stream
, nref
);
641 /* Stream out profile_summary to OB. */
644 output_profile_summary (struct lto_simple_output_block
*ob
)
648 /* We do not output num, it is not terribly useful. */
649 gcc_assert (profile_info
->runs
);
650 lto_output_uleb128_stream (ob
->main_stream
, profile_info
->runs
);
651 lto_output_sleb128_stream (ob
->main_stream
, profile_info
->sum_all
);
652 lto_output_sleb128_stream (ob
->main_stream
, profile_info
->run_max
);
653 lto_output_sleb128_stream (ob
->main_stream
, profile_info
->sum_max
);
656 lto_output_uleb128_stream (ob
->main_stream
, 0);
659 /* Add NODE into encoder as well as nodes it is cloned from.
660 Do it in a way so clones appear first. */
663 add_node_to (lto_cgraph_encoder_t encoder
, struct cgraph_node
*node
,
667 add_node_to (encoder
, node
->clone_of
, include_body
);
668 else if (include_body
)
669 lto_set_cgraph_encoder_encode_body (encoder
, node
);
670 lto_cgraph_encoder_encode (encoder
, node
);
673 /* Add all references in LIST to encoders. */
676 add_references (lto_cgraph_encoder_t encoder
,
677 lto_varpool_encoder_t varpool_encoder
,
678 struct ipa_ref_list
*list
)
682 for (i
= 0; ipa_ref_list_reference_iterate (list
, i
, ref
); i
++)
683 if (ref
->refered_type
== IPA_REF_CGRAPH
)
684 add_node_to (encoder
, ipa_ref_node (ref
), false);
687 struct varpool_node
*vnode
= ipa_ref_varpool_node (ref
);
688 lto_varpool_encoder_encode (varpool_encoder
, vnode
);
692 /* Output all callees or indirect outgoing edges. EDGE must be the first such
696 output_outgoing_cgraph_edges (struct cgraph_edge
*edge
,
697 struct lto_simple_output_block
*ob
,
698 lto_cgraph_encoder_t encoder
)
703 /* Output edges in backward direction, so the reconstructed callgraph match
704 and it is easy to associate call sites in the IPA pass summaries. */
705 while (edge
->next_callee
)
706 edge
= edge
->next_callee
;
707 for (; edge
; edge
= edge
->prev_callee
)
708 lto_output_edge (ob
, edge
, encoder
);
711 /* Output the part of the cgraph in SET. */
714 output_refs (cgraph_node_set set
, varpool_node_set vset
,
715 lto_cgraph_encoder_t encoder
,
716 lto_varpool_encoder_t varpool_encoder
)
718 cgraph_node_set_iterator csi
;
719 varpool_node_set_iterator vsi
;
720 struct lto_simple_output_block
*ob
;
725 ob
= lto_create_simple_output_block (LTO_section_refs
);
727 for (csi
= csi_start (set
); !csi_end_p (csi
); csi_next (&csi
))
729 struct cgraph_node
*node
= csi_node (csi
);
731 count
= ipa_ref_list_nreferences (&node
->ref_list
);
734 lto_output_uleb128_stream (ob
->main_stream
, count
);
735 lto_output_uleb128_stream (ob
->main_stream
,
736 lto_cgraph_encoder_lookup (encoder
, node
));
737 for (i
= 0; ipa_ref_list_reference_iterate (&node
->ref_list
, i
, ref
); i
++)
738 lto_output_ref (ob
, ref
, encoder
, varpool_encoder
);
742 lto_output_uleb128_stream (ob
->main_stream
, 0);
744 for (vsi
= vsi_start (vset
); !vsi_end_p (vsi
); vsi_next (&vsi
))
746 struct varpool_node
*node
= vsi_node (vsi
);
748 count
= ipa_ref_list_nreferences (&node
->ref_list
);
751 lto_output_uleb128_stream (ob
->main_stream
, count
);
752 lto_output_uleb128_stream (ob
->main_stream
,
753 lto_varpool_encoder_lookup (varpool_encoder
,
755 for (i
= 0; ipa_ref_list_reference_iterate (&node
->ref_list
, i
, ref
); i
++)
756 lto_output_ref (ob
, ref
, encoder
, varpool_encoder
);
760 lto_output_uleb128_stream (ob
->main_stream
, 0);
762 lto_destroy_simple_output_block (ob
);
765 /* Find out all cgraph and varpool nodes we want to encode in current unit
766 and insert them to encoders. */
768 compute_ltrans_boundary (struct lto_out_decl_state
*state
,
769 cgraph_node_set set
, varpool_node_set vset
)
771 struct cgraph_node
*node
;
772 cgraph_node_set_iterator csi
;
773 varpool_node_set_iterator vsi
;
774 struct cgraph_edge
*edge
;
776 lto_cgraph_encoder_t encoder
;
777 lto_varpool_encoder_t varpool_encoder
;
779 encoder
= state
->cgraph_node_encoder
= lto_cgraph_encoder_new ();
780 varpool_encoder
= state
->varpool_node_encoder
= lto_varpool_encoder_new ();
782 /* Go over all the nodes in SET and assign references. */
783 for (csi
= csi_start (set
); !csi_end_p (csi
); csi_next (&csi
))
785 node
= csi_node (csi
);
786 add_node_to (encoder
, node
, true);
787 add_references (encoder
, varpool_encoder
, &node
->ref_list
);
789 for (vsi
= vsi_start (vset
); !vsi_end_p (vsi
); vsi_next (&vsi
))
791 struct varpool_node
*vnode
= vsi_node (vsi
);
792 gcc_assert (!vnode
->alias
);
793 lto_varpool_encoder_encode (varpool_encoder
, vnode
);
794 lto_set_varpool_encoder_encode_initializer (varpool_encoder
, vnode
);
795 add_references (encoder
, varpool_encoder
, &vnode
->ref_list
);
797 /* Pickle in also the initializer of all referenced readonly variables
798 to help folding. Constant pool variables are not shared, so we must
800 for (i
= 0; i
< lto_varpool_encoder_size (varpool_encoder
); i
++)
802 struct varpool_node
*vnode
= lto_varpool_encoder_deref (varpool_encoder
, i
);
803 if (DECL_INITIAL (vnode
->decl
)
804 && !lto_varpool_encoder_encode_initializer_p (varpool_encoder
,
806 && (DECL_IN_CONSTANT_POOL (vnode
->decl
)
807 || TREE_READONLY (vnode
->decl
)))
809 lto_set_varpool_encoder_encode_initializer (varpool_encoder
, vnode
);
810 add_references (encoder
, varpool_encoder
, &vnode
->ref_list
);
814 /* Go over all the nodes again to include callees that are not in
816 for (csi
= csi_start (set
); !csi_end_p (csi
); csi_next (&csi
))
818 node
= csi_node (csi
);
819 for (edge
= node
->callees
; edge
; edge
= edge
->next_callee
)
821 struct cgraph_node
*callee
= edge
->callee
;
822 if (!cgraph_node_in_set_p (callee
, set
))
824 /* We should have moved all the inlines. */
825 gcc_assert (!callee
->global
.inlined_to
);
826 add_node_to (encoder
, callee
, false);
832 /* Output the part of the cgraph in SET. */
835 output_cgraph (cgraph_node_set set
, varpool_node_set vset
)
837 struct cgraph_node
*node
;
838 struct lto_simple_output_block
*ob
;
839 cgraph_node_set_iterator csi
;
841 lto_cgraph_encoder_t encoder
;
842 lto_varpool_encoder_t varpool_encoder
;
843 struct cgraph_asm_node
*can
;
846 output_cgraph_opt_summary ();
848 ob
= lto_create_simple_output_block (LTO_section_cgraph
);
850 output_profile_summary (ob
);
852 /* An encoder for cgraph nodes should have been created by
853 ipa_write_summaries_1. */
854 gcc_assert (ob
->decl_state
->cgraph_node_encoder
);
855 gcc_assert (ob
->decl_state
->varpool_node_encoder
);
856 encoder
= ob
->decl_state
->cgraph_node_encoder
;
857 varpool_encoder
= ob
->decl_state
->varpool_node_encoder
;
859 /* Write out the nodes. We must first output a node and then its clones,
860 otherwise at a time reading back the node there would be nothing to clone
862 n_nodes
= lto_cgraph_encoder_size (encoder
);
863 for (i
= 0; i
< n_nodes
; i
++)
865 node
= lto_cgraph_encoder_deref (encoder
, i
);
866 lto_output_node (ob
, node
, encoder
, set
, vset
);
869 /* Go over the nodes in SET again to write edges. */
870 for (csi
= csi_start (set
); !csi_end_p (csi
); csi_next (&csi
))
872 node
= csi_node (csi
);
873 output_outgoing_cgraph_edges (node
->callees
, ob
, encoder
);
874 output_outgoing_cgraph_edges (node
->indirect_calls
, ob
, encoder
);
877 lto_output_uleb128_stream (ob
->main_stream
, 0);
879 /* Emit toplevel asms. */
880 for (can
= cgraph_asm_nodes
; can
; can
= can
->next
)
882 int len
= TREE_STRING_LENGTH (can
->asm_str
);
883 lto_output_uleb128_stream (ob
->main_stream
, len
);
884 for (i
= 0; i
< len
; ++i
)
885 lto_output_1_stream (ob
->main_stream
,
886 TREE_STRING_POINTER (can
->asm_str
)[i
]);
889 lto_output_uleb128_stream (ob
->main_stream
, 0);
891 lto_destroy_simple_output_block (ob
);
892 output_varpool (set
, vset
);
893 output_refs (set
, vset
, encoder
, varpool_encoder
);
896 /* Overwrite the information in NODE based on FILE_DATA, TAG, FLAGS,
897 STACK_SIZE, SELF_TIME and SELF_SIZE. This is called either to initialize
898 NODE or to replace the values in it, for instance because the first
899 time we saw it, the function body was not available but now it
900 is. BP is a bitpack with all the bitflags for NODE read from the
904 input_overwrite_node (struct lto_file_decl_data
*file_data
,
905 struct cgraph_node
*node
,
906 enum LTO_cgraph_tags tag
,
907 struct bitpack_d
*bp
,
908 unsigned int stack_size
,
909 unsigned int self_time
,
910 unsigned int time_inlining_benefit
,
911 unsigned int self_size
,
912 unsigned int size_inlining_benefit
)
914 node
->aux
= (void *) tag
;
915 node
->local
.inline_summary
.estimated_self_stack_size
= stack_size
;
916 node
->local
.inline_summary
.self_time
= self_time
;
917 node
->local
.inline_summary
.time_inlining_benefit
= time_inlining_benefit
;
918 node
->local
.inline_summary
.self_size
= self_size
;
919 node
->local
.inline_summary
.size_inlining_benefit
= size_inlining_benefit
;
920 node
->global
.time
= self_time
;
921 node
->global
.size
= self_size
;
922 node
->global
.estimated_stack_size
= stack_size
;
923 node
->global
.estimated_growth
= INT_MIN
;
924 node
->local
.lto_file_data
= file_data
;
926 node
->local
.local
= bp_unpack_value (bp
, 1);
927 node
->local
.externally_visible
= bp_unpack_value (bp
, 1);
928 node
->local
.finalized
= bp_unpack_value (bp
, 1);
929 node
->local
.inlinable
= bp_unpack_value (bp
, 1);
930 node
->local
.versionable
= bp_unpack_value (bp
, 1);
931 node
->local
.disregard_inline_limits
= bp_unpack_value (bp
, 1);
932 node
->local
.redefined_extern_inline
= bp_unpack_value (bp
, 1);
933 node
->local
.vtable_method
= bp_unpack_value (bp
, 1);
934 node
->needed
= bp_unpack_value (bp
, 1);
935 node
->address_taken
= bp_unpack_value (bp
, 1);
936 node
->abstract_and_needed
= bp_unpack_value (bp
, 1);
937 node
->reachable_from_other_partition
= bp_unpack_value (bp
, 1);
938 node
->lowered
= bp_unpack_value (bp
, 1);
939 node
->analyzed
= tag
== LTO_cgraph_analyzed_node
;
940 node
->in_other_partition
= bp_unpack_value (bp
, 1);
941 node
->alias
= bp_unpack_value (bp
, 1);
942 node
->finalized_by_frontend
= bp_unpack_value (bp
, 1);
943 node
->frequency
= (enum node_frequency
)bp_unpack_value (bp
, 2);
946 /* Output the part of the cgraph in SET. */
949 output_varpool (cgraph_node_set set
, varpool_node_set vset
)
951 struct lto_simple_output_block
*ob
= lto_create_simple_output_block (LTO_section_varpool
);
952 lto_varpool_encoder_t varpool_encoder
= ob
->decl_state
->varpool_node_encoder
;
953 int len
= lto_varpool_encoder_size (varpool_encoder
), i
;
955 lto_output_uleb128_stream (ob
->main_stream
, len
);
957 /* Write out the nodes. We must first output a node and then its clones,
958 otherwise at a time reading back the node there would be nothing to clone
960 for (i
= 0; i
< len
; i
++)
962 lto_output_varpool_node (ob
, lto_varpool_encoder_deref (varpool_encoder
, i
),
967 lto_destroy_simple_output_block (ob
);
970 /* Read a node from input_block IB. TAG is the node's tag just read.
971 Return the node read or overwriten. */
973 static struct cgraph_node
*
974 input_node (struct lto_file_decl_data
*file_data
,
975 struct lto_input_block
*ib
,
976 enum LTO_cgraph_tags tag
,
977 VEC(cgraph_node_ptr
, heap
) *nodes
)
980 struct cgraph_node
*node
;
984 int ref
= LCC_NOT_FOUND
, ref2
= LCC_NOT_FOUND
;
987 int time_inlining_benefit
= 0;
988 int size_inlining_benefit
= 0;
989 unsigned long same_body_count
= 0;
992 clone_ref
= lto_input_sleb128 (ib
);
994 decl_index
= lto_input_uleb128 (ib
);
995 fn_decl
= lto_file_decl_data_get_fn_decl (file_data
, decl_index
);
997 if (clone_ref
!= LCC_NOT_FOUND
)
999 node
= cgraph_clone_node (VEC_index (cgraph_node_ptr
, nodes
, clone_ref
), fn_decl
,
1000 0, CGRAPH_FREQ_BASE
, 0, false, NULL
);
1003 node
= cgraph_node (fn_decl
);
1005 node
->count
= lto_input_sleb128 (ib
);
1007 if (tag
== LTO_cgraph_analyzed_node
)
1009 stack_size
= lto_input_sleb128 (ib
);
1010 self_size
= lto_input_sleb128 (ib
);
1011 size_inlining_benefit
= lto_input_sleb128 (ib
);
1012 self_time
= lto_input_sleb128 (ib
);
1013 time_inlining_benefit
= lto_input_sleb128 (ib
);
1015 ref
= lto_input_sleb128 (ib
);
1018 ref2
= lto_input_sleb128 (ib
);
1020 /* Make sure that we have not read this node before. Nodes that
1021 have already been read will have their tag stored in the 'aux'
1022 field. Since built-in functions can be referenced in multiple
1023 functions, they are expected to be read more than once. */
1024 if (node
->aux
&& !DECL_IS_BUILTIN (node
->decl
))
1025 internal_error ("bytecode stream: found multiple instances of cgraph "
1026 "node %d", node
->uid
);
1028 bp
= lto_input_bitpack (ib
);
1029 input_overwrite_node (file_data
, node
, tag
, &bp
, stack_size
, self_time
,
1030 time_inlining_benefit
, self_size
,
1031 size_inlining_benefit
);
1033 /* Store a reference for now, and fix up later to be a pointer. */
1034 node
->global
.inlined_to
= (cgraph_node_ptr
) (intptr_t) ref
;
1036 /* Store a reference for now, and fix up later to be a pointer. */
1037 node
->same_comdat_group
= (cgraph_node_ptr
) (intptr_t) ref2
;
1039 same_body_count
= lto_input_uleb128 (ib
);
1040 while (same_body_count
-- > 0)
1044 decl_index
= lto_input_uleb128 (ib
);
1045 alias_decl
= lto_file_decl_data_get_fn_decl (file_data
, decl_index
);
1046 type
= lto_input_uleb128 (ib
);
1050 decl_index
= lto_input_uleb128 (ib
);
1051 real_alias
= lto_file_decl_data_get_fn_decl (file_data
, decl_index
);
1052 cgraph_same_body_alias (alias_decl
, real_alias
);
1056 HOST_WIDE_INT fixed_offset
= lto_input_uleb128 (ib
);
1057 HOST_WIDE_INT virtual_value
= lto_input_uleb128 (ib
);
1059 decl_index
= lto_input_uleb128 (ib
);
1060 real_alias
= lto_file_decl_data_get_fn_decl (file_data
, decl_index
);
1061 cgraph_add_thunk (alias_decl
, fn_decl
, type
& 2, fixed_offset
,
1063 (type
& 4) ? size_int (virtual_value
) : NULL_TREE
,
1070 /* Read a node from input_block IB. TAG is the node's tag just read.
1071 Return the node read or overwriten. */
1073 static struct varpool_node
*
1074 input_varpool_node (struct lto_file_decl_data
*file_data
,
1075 struct lto_input_block
*ib
)
1079 struct varpool_node
*node
;
1080 struct bitpack_d bp
;
1083 int ref
= LCC_NOT_FOUND
;
1085 decl_index
= lto_input_uleb128 (ib
);
1086 var_decl
= lto_file_decl_data_get_var_decl (file_data
, decl_index
);
1087 node
= varpool_node (var_decl
);
1088 node
->lto_file_data
= file_data
;
1090 bp
= lto_input_bitpack (ib
);
1091 node
->externally_visible
= bp_unpack_value (&bp
, 1);
1092 node
->force_output
= bp_unpack_value (&bp
, 1);
1093 node
->finalized
= bp_unpack_value (&bp
, 1);
1094 node
->alias
= bp_unpack_value (&bp
, 1);
1095 node
->analyzed
= node
->finalized
;
1096 node
->used_from_other_partition
= bp_unpack_value (&bp
, 1);
1097 node
->in_other_partition
= bp_unpack_value (&bp
, 1);
1098 aliases_p
= bp_unpack_value (&bp
, 1);
1099 if (node
->finalized
)
1100 varpool_mark_needed_node (node
);
1101 ref
= lto_input_sleb128 (ib
);
1102 /* Store a reference for now, and fix up later to be a pointer. */
1103 node
->same_comdat_group
= (struct varpool_node
*) (intptr_t) ref
;
1106 count
= lto_input_uleb128 (ib
);
1107 for (; count
> 0; count
--)
1109 tree decl
= lto_file_decl_data_get_var_decl (file_data
,
1110 lto_input_uleb128 (ib
));
1111 varpool_extra_name_alias (decl
, var_decl
);
1117 /* Read a node from input_block IB. TAG is the node's tag just read.
1118 Return the node read or overwriten. */
1121 input_ref (struct lto_input_block
*ib
,
1122 struct cgraph_node
*refering_node
,
1123 struct varpool_node
*refering_varpool_node
,
1124 VEC(cgraph_node_ptr
, heap
) *nodes
,
1125 VEC(varpool_node_ptr
, heap
) *varpool_nodes
)
1127 struct cgraph_node
*node
= NULL
;
1128 struct varpool_node
*varpool_node
= NULL
;
1129 struct bitpack_d bp
;
1130 enum ipa_ref_type type
;
1131 enum ipa_ref_use use
;
1133 bp
= lto_input_bitpack (ib
);
1134 type
= (enum ipa_ref_type
) bp_unpack_value (&bp
, 1);
1135 use
= (enum ipa_ref_use
) bp_unpack_value (&bp
, 2);
1136 if (type
== IPA_REF_CGRAPH
)
1137 node
= VEC_index (cgraph_node_ptr
, nodes
, lto_input_sleb128 (ib
));
1139 varpool_node
= VEC_index (varpool_node_ptr
, varpool_nodes
, lto_input_sleb128 (ib
));
1140 ipa_record_reference (refering_node
, refering_varpool_node
,
1141 node
, varpool_node
, use
, NULL
);
1144 /* Read an edge from IB. NODES points to a vector of previously read nodes for
1145 decoding caller and callee of the edge to be read. If INDIRECT is true, the
1146 edge being read is indirect (in the sense that it has
1147 indirect_unknown_callee set). */
1150 input_edge (struct lto_input_block
*ib
, VEC(cgraph_node_ptr
, heap
) *nodes
,
1153 struct cgraph_node
*caller
, *callee
;
1154 struct cgraph_edge
*edge
;
1155 unsigned int stmt_id
;
1159 cgraph_inline_failed_t inline_failed
;
1160 struct bitpack_d bp
;
1161 enum ld_plugin_symbol_resolution caller_resolution
;
1164 caller
= VEC_index (cgraph_node_ptr
, nodes
, lto_input_sleb128 (ib
));
1165 if (caller
== NULL
|| caller
->decl
== NULL_TREE
)
1166 internal_error ("bytecode stream: no caller found while reading edge");
1170 callee
= VEC_index (cgraph_node_ptr
, nodes
, lto_input_sleb128 (ib
));
1171 if (callee
== NULL
|| callee
->decl
== NULL_TREE
)
1172 internal_error ("bytecode stream: no callee found while reading edge");
1177 count
= (gcov_type
) lto_input_sleb128 (ib
);
1179 bp
= lto_input_bitpack (ib
);
1180 stmt_id
= (unsigned int) bp_unpack_value (&bp
, HOST_BITS_PER_INT
);
1181 inline_failed
= (cgraph_inline_failed_t
) bp_unpack_value (&bp
,
1183 freq
= (int) bp_unpack_value (&bp
, HOST_BITS_PER_INT
);
1184 nest
= (unsigned) bp_unpack_value (&bp
, 30);
1186 /* If the caller was preempted, don't create the edge.
1187 ??? Should we ever have edges from a preempted caller? */
1188 caller_resolution
= lto_symtab_get_resolution (caller
->decl
);
1189 if (caller_resolution
== LDPR_PREEMPTED_REG
1190 || caller_resolution
== LDPR_PREEMPTED_IR
)
1194 edge
= cgraph_create_indirect_edge (caller
, NULL
, 0, count
, freq
, nest
);
1196 edge
= cgraph_create_edge (caller
, callee
, NULL
, count
, freq
, nest
);
1198 edge
->indirect_inlining_edge
= bp_unpack_value (&bp
, 1);
1199 edge
->lto_stmt_uid
= stmt_id
;
1200 edge
->inline_failed
= inline_failed
;
1201 edge
->call_stmt_cannot_inline_p
= bp_unpack_value (&bp
, 1);
1202 edge
->can_throw_external
= bp_unpack_value (&bp
, 1);
1205 if (bp_unpack_value (&bp
, 1))
1206 ecf_flags
|= ECF_CONST
;
1207 if (bp_unpack_value (&bp
, 1))
1208 ecf_flags
|= ECF_PURE
;
1209 if (bp_unpack_value (&bp
, 1))
1210 ecf_flags
|= ECF_NORETURN
;
1211 if (bp_unpack_value (&bp
, 1))
1212 ecf_flags
|= ECF_MALLOC
;
1213 if (bp_unpack_value (&bp
, 1))
1214 ecf_flags
|= ECF_NOTHROW
;
1215 if (bp_unpack_value (&bp
, 1))
1216 ecf_flags
|= ECF_RETURNS_TWICE
;
1217 edge
->indirect_info
->ecf_flags
= ecf_flags
;
1222 /* Read a cgraph from IB using the info in FILE_DATA. */
1224 static VEC(cgraph_node_ptr
, heap
) *
1225 input_cgraph_1 (struct lto_file_decl_data
*file_data
,
1226 struct lto_input_block
*ib
)
1228 enum LTO_cgraph_tags tag
;
1229 VEC(cgraph_node_ptr
, heap
) *nodes
= NULL
;
1230 struct cgraph_node
*node
;
1232 unsigned HOST_WIDE_INT len
;
1234 tag
= (enum LTO_cgraph_tags
) lto_input_uleb128 (ib
);
1237 if (tag
== LTO_cgraph_edge
)
1238 input_edge (ib
, nodes
, false);
1239 else if (tag
== LTO_cgraph_indirect_edge
)
1240 input_edge (ib
, nodes
, true);
1243 node
= input_node (file_data
, ib
, tag
,nodes
);
1244 if (node
== NULL
|| node
->decl
== NULL_TREE
)
1245 internal_error ("bytecode stream: found empty cgraph node");
1246 VEC_safe_push (cgraph_node_ptr
, heap
, nodes
, node
);
1247 lto_cgraph_encoder_encode (file_data
->cgraph_node_encoder
, node
);
1250 tag
= (enum LTO_cgraph_tags
) lto_input_uleb128 (ib
);
1253 /* Input toplevel asms. */
1254 len
= lto_input_uleb128 (ib
);
1257 char *str
= (char *)xmalloc (len
+ 1);
1258 for (i
= 0; i
< len
; ++i
)
1259 str
[i
] = lto_input_1_unsigned (ib
);
1260 cgraph_add_asm_node (build_string (len
, str
));
1263 len
= lto_input_uleb128 (ib
);
1266 for (i
= 0; VEC_iterate (cgraph_node_ptr
, nodes
, i
, node
); i
++)
1268 int ref
= (int) (intptr_t) node
->global
.inlined_to
;
1270 /* Fixup inlined_to from reference to pointer. */
1271 if (ref
!= LCC_NOT_FOUND
)
1272 node
->global
.inlined_to
= VEC_index (cgraph_node_ptr
, nodes
, ref
);
1274 node
->global
.inlined_to
= NULL
;
1276 ref
= (int) (intptr_t) node
->same_comdat_group
;
1278 /* Fixup same_comdat_group from reference to pointer. */
1279 if (ref
!= LCC_NOT_FOUND
)
1280 node
->same_comdat_group
= VEC_index (cgraph_node_ptr
, nodes
, ref
);
1282 node
->same_comdat_group
= NULL
;
1287 /* Read a varpool from IB using the info in FILE_DATA. */
1289 static VEC(varpool_node_ptr
, heap
) *
1290 input_varpool_1 (struct lto_file_decl_data
*file_data
,
1291 struct lto_input_block
*ib
)
1293 unsigned HOST_WIDE_INT len
;
1294 VEC(varpool_node_ptr
, heap
) *varpool
= NULL
;
1296 struct varpool_node
*node
;
1298 len
= lto_input_uleb128 (ib
);
1301 VEC_safe_push (varpool_node_ptr
, heap
, varpool
,
1302 input_varpool_node (file_data
, ib
));
1305 for (i
= 0; VEC_iterate (varpool_node_ptr
, varpool
, i
, node
); i
++)
1307 int ref
= (int) (intptr_t) node
->same_comdat_group
;
1309 /* Fixup same_comdat_group from reference to pointer. */
1310 if (ref
!= LCC_NOT_FOUND
)
1311 node
->same_comdat_group
= VEC_index (varpool_node_ptr
, varpool
, ref
);
1313 node
->same_comdat_group
= NULL
;
1318 /* Input ipa_refs. */
1321 input_refs (struct lto_input_block
*ib
,
1322 VEC(cgraph_node_ptr
, heap
) *nodes
,
1323 VEC(varpool_node_ptr
, heap
) *varpool
)
1329 struct cgraph_node
*node
;
1330 count
= lto_input_uleb128 (ib
);
1333 idx
= lto_input_uleb128 (ib
);
1334 node
= VEC_index (cgraph_node_ptr
, nodes
, idx
);
1337 input_ref (ib
, node
, NULL
, nodes
, varpool
);
1343 struct varpool_node
*node
;
1344 count
= lto_input_uleb128 (ib
);
1347 node
= VEC_index (varpool_node_ptr
, varpool
, lto_input_uleb128 (ib
));
1350 input_ref (ib
, NULL
, node
, nodes
, varpool
);
1357 static struct gcov_ctr_summary lto_gcov_summary
;
1359 /* Input profile_info from IB. */
1361 input_profile_summary (struct lto_input_block
*ib
)
1363 unsigned int runs
= lto_input_uleb128 (ib
);
1368 profile_info
= <o_gcov_summary
;
1369 lto_gcov_summary
.runs
= runs
;
1370 lto_gcov_summary
.sum_all
= lto_input_sleb128 (ib
);
1371 lto_gcov_summary
.run_max
= lto_input_sleb128 (ib
);
1372 lto_gcov_summary
.sum_max
= lto_input_sleb128 (ib
);
1374 /* We can support this by scaling all counts to nearest common multiple
1375 of all different runs, but it is perhaps not worth the effort. */
1376 else if (profile_info
->runs
!= runs
1377 || profile_info
->sum_all
!= lto_input_sleb128 (ib
)
1378 || profile_info
->run_max
!= lto_input_sleb128 (ib
)
1379 || profile_info
->sum_max
!= lto_input_sleb128 (ib
))
1380 sorry ("Combining units with different profiles is not supported.");
1381 /* We allow some units to have profile and other to not have one. This will
1382 just make unprofiled units to be size optimized that is sane. */
1387 /* Input and merge the cgraph from each of the .o files passed to
1393 struct lto_file_decl_data
**file_data_vec
= lto_get_file_decl_data ();
1394 struct lto_file_decl_data
*file_data
;
1396 struct cgraph_node
*node
;
1398 while ((file_data
= file_data_vec
[j
++]))
1402 struct lto_input_block
*ib
;
1403 VEC(cgraph_node_ptr
, heap
) *nodes
;
1404 VEC(varpool_node_ptr
, heap
) *varpool
;
1406 ib
= lto_create_simple_input_block (file_data
, LTO_section_cgraph
,
1408 input_profile_summary (ib
);
1409 file_data
->cgraph_node_encoder
= lto_cgraph_encoder_new ();
1410 nodes
= input_cgraph_1 (file_data
, ib
);
1411 lto_destroy_simple_input_block (file_data
, LTO_section_cgraph
,
1414 ib
= lto_create_simple_input_block (file_data
, LTO_section_varpool
,
1416 varpool
= input_varpool_1 (file_data
, ib
);
1417 lto_destroy_simple_input_block (file_data
, LTO_section_varpool
,
1420 ib
= lto_create_simple_input_block (file_data
, LTO_section_refs
,
1422 input_refs (ib
, nodes
, varpool
);
1423 lto_destroy_simple_input_block (file_data
, LTO_section_refs
,
1426 input_cgraph_opt_summary (nodes
);
1427 VEC_free (cgraph_node_ptr
, heap
, nodes
);
1428 VEC_free (varpool_node_ptr
, heap
, varpool
);
1431 /* Clear out the aux field that was used to store enough state to
1432 tell which nodes should be overwritten. */
1433 for (node
= cgraph_nodes
; node
; node
= node
->next
)
1435 /* Some nodes may have been created by cgraph_node. This
1436 happens when the callgraph contains nested functions. If the
1437 node for the parent function was never emitted to the gimple
1438 file, cgraph_node will create a node for it when setting the
1439 context of the nested function. */
1440 if (node
->local
.lto_file_data
)
1445 /* True when we need optimization summary for NODE. */
1448 output_cgraph_opt_summary_p (struct cgraph_node
*node
)
1450 if (!node
->clone_of
)
1452 return (node
->clone
.tree_map
1453 || node
->clone
.args_to_skip
1454 || node
->clone
.combined_args_to_skip
);
1457 /* Output optimization summary for NODE to OB. */
1460 output_node_opt_summary (struct output_block
*ob
,
1461 struct cgraph_node
*node
)
1465 struct ipa_replace_map
*map
;
1466 struct bitpack_d bp
;
1469 lto_output_uleb128_stream (ob
->main_stream
,
1470 bitmap_count_bits (node
->clone
.args_to_skip
));
1471 EXECUTE_IF_SET_IN_BITMAP (node
->clone
.args_to_skip
, 0, index
, bi
)
1472 lto_output_uleb128_stream (ob
->main_stream
, index
);
1473 lto_output_uleb128_stream (ob
->main_stream
,
1474 bitmap_count_bits (node
->clone
.combined_args_to_skip
));
1475 EXECUTE_IF_SET_IN_BITMAP (node
->clone
.combined_args_to_skip
, 0, index
, bi
)
1476 lto_output_uleb128_stream (ob
->main_stream
, index
);
1477 lto_output_uleb128_stream (ob
->main_stream
,
1478 VEC_length (ipa_replace_map_p
, node
->clone
.tree_map
));
1479 for (i
= 0; VEC_iterate (ipa_replace_map_p
, node
->clone
.tree_map
, i
, map
); i
++)
1484 for (parm_num
= 0, parm
= DECL_ARGUMENTS (node
->decl
); parm
;
1485 parm
= TREE_CHAIN (parm
), parm_num
++)
1486 if (map
->old_tree
== parm
)
1488 /* At the moment we assume all old trees to be PARM_DECLs, because we have no
1489 mechanism to store function local declarations into summaries. */
1491 lto_output_uleb128_stream (ob
->main_stream
, parm_num
);
1492 lto_output_tree (ob
, map
->new_tree
, true);
1493 bp
= bitpack_create (ob
->main_stream
);
1494 bp_pack_value (&bp
, map
->replace_p
, 1);
1495 bp_pack_value (&bp
, map
->ref_p
, 1);
1496 lto_output_bitpack (&bp
);
1500 /* Output optimization summaries stored in callgraph.
1501 At the moment it is the clone info structure. */
1504 output_cgraph_opt_summary (void)
1506 struct cgraph_node
*node
;
1508 lto_cgraph_encoder_t encoder
;
1509 struct output_block
*ob
= create_output_block (LTO_section_cgraph_opt_sum
);
1512 ob
->cgraph_node
= NULL
;
1513 encoder
= ob
->decl_state
->cgraph_node_encoder
;
1514 n_nodes
= lto_cgraph_encoder_size (encoder
);
1515 for (i
= 0; i
< n_nodes
; i
++)
1516 if (output_cgraph_opt_summary_p (lto_cgraph_encoder_deref (encoder
, i
)))
1518 lto_output_uleb128_stream (ob
->main_stream
, count
);
1519 for (i
= 0; i
< n_nodes
; i
++)
1521 node
= lto_cgraph_encoder_deref (encoder
, i
);
1522 if (output_cgraph_opt_summary_p (node
))
1524 lto_output_uleb128_stream (ob
->main_stream
, i
);
1525 output_node_opt_summary (ob
, node
);
1528 produce_asm (ob
, NULL
);
1529 destroy_output_block (ob
);
1532 /* Input optimiation summary of NODE. */
1535 input_node_opt_summary (struct cgraph_node
*node
,
1536 struct lto_input_block
*ib_main
,
1537 struct data_in
*data_in
)
1542 struct bitpack_d bp
;
1544 count
= lto_input_uleb128 (ib_main
);
1546 node
->clone
.args_to_skip
= BITMAP_GGC_ALLOC ();
1547 for (i
= 0; i
< count
; i
++)
1549 bit
= lto_input_uleb128 (ib_main
);
1550 bitmap_set_bit (node
->clone
.args_to_skip
, bit
);
1552 count
= lto_input_uleb128 (ib_main
);
1554 node
->clone
.combined_args_to_skip
= BITMAP_GGC_ALLOC ();
1555 for (i
= 0; i
< count
; i
++)
1557 bit
= lto_input_uleb128 (ib_main
);
1558 bitmap_set_bit (node
->clone
.combined_args_to_skip
, bit
);
1560 count
= lto_input_uleb128 (ib_main
);
1561 for (i
= 0; i
< count
; i
++)
1565 struct ipa_replace_map
*map
= ggc_alloc_ipa_replace_map ();
1567 VEC_safe_push (ipa_replace_map_p
, gc
, node
->clone
.tree_map
, map
);
1568 for (parm_num
= 0, parm
= DECL_ARGUMENTS (node
->decl
); parm_num
;
1569 parm
= TREE_CHAIN (parm
))
1571 map
->parm_num
= lto_input_uleb128 (ib_main
);
1572 map
->old_tree
= NULL
;
1573 map
->new_tree
= lto_input_tree (ib_main
, data_in
);
1574 bp
= lto_input_bitpack (ib_main
);
1575 map
->replace_p
= bp_unpack_value (&bp
, 1);
1576 map
->ref_p
= bp_unpack_value (&bp
, 1);
1580 /* Read section in file FILE_DATA of length LEN with data DATA. */
1583 input_cgraph_opt_section (struct lto_file_decl_data
*file_data
,
1584 const char *data
, size_t len
, VEC (cgraph_node_ptr
,
1587 const struct lto_function_header
*header
=
1588 (const struct lto_function_header
*) data
;
1589 const int32_t cfg_offset
= sizeof (struct lto_function_header
);
1590 const int32_t main_offset
= cfg_offset
+ header
->cfg_size
;
1591 const int32_t string_offset
= main_offset
+ header
->main_size
;
1592 struct data_in
*data_in
;
1593 struct lto_input_block ib_main
;
1597 LTO_INIT_INPUT_BLOCK (ib_main
, (const char *) data
+ main_offset
, 0,
1601 lto_data_in_create (file_data
, (const char *) data
+ string_offset
,
1602 header
->string_size
, NULL
);
1603 count
= lto_input_uleb128 (&ib_main
);
1605 for (i
= 0; i
< count
; i
++)
1607 int ref
= lto_input_uleb128 (&ib_main
);
1608 input_node_opt_summary (VEC_index (cgraph_node_ptr
, nodes
, ref
),
1611 lto_free_section_data (file_data
, LTO_section_jump_functions
, NULL
, data
,
1613 lto_data_in_delete (data_in
);
1616 /* Input optimization summary of cgraph. */
1619 input_cgraph_opt_summary (VEC (cgraph_node_ptr
, heap
) * nodes
)
1621 struct lto_file_decl_data
**file_data_vec
= lto_get_file_decl_data ();
1622 struct lto_file_decl_data
*file_data
;
1625 while ((file_data
= file_data_vec
[j
++]))
1629 lto_get_section_data (file_data
, LTO_section_cgraph_opt_sum
, NULL
,
1633 input_cgraph_opt_section (file_data
, data
, len
, nodes
);