1 /* Read and annotate call graph profile from the auto profile data file.
2 Copyright (C) 2014-2019 Free Software Foundation, Inc.
3 Contributed by Dehao Chen (dehao@google.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
30 #include "alloc-pool.h"
31 #include "tree-pass.h"
35 #include "diagnostic-core.h"
37 #include "langhooks.h"
40 #include "tree-cfgcleanup.h"
41 #include "tree-into-ssa.h"
42 #include "gimple-iterator.h"
43 #include "value-prof.h"
45 #include "symbol-summary.h"
47 #include "ipa-fnsummary.h"
48 #include "ipa-inline.h"
49 #include "tree-inline.h"
50 #include "auto-profile.h"
51 #include "tree-pretty-print.h"
52 #include "gimple-pretty-print.h"
54 /* The following routines implements AutoFDO optimization.
56 This optimization uses sampling profiles to annotate basic block counts
57 and uses heuristics to estimate branch probabilities.
59 There are three phases in AutoFDO:
61 Phase 1: Read profile from the profile data file.
62 The following info is read from the profile datafile:
63 * string_table: a map between function name and its index.
64 * autofdo_source_profile: a map from function_instance name to
65 function_instance. This is represented as a forest of
67 * WorkingSet: a histogram of how many instructions are covered for a
68 given percentage of total cycles. This is describing the binary
69 level information (not source level). This info is used to help
70 decide if we want aggressive optimizations that could increase
71 code footprint (e.g. loop unroll etc.)
72 A function instance is an instance of function that could either be a
73 standalone symbol, or a clone of a function that is inlined into another
76 Phase 2: Early inline + value profile transformation.
77 Early inline uses autofdo_source_profile to find if a callsite is:
78 * inlined in the profiled binary.
79 * callee body is hot in the profiling run.
80 If both condition satisfies, early inline will inline the callsite
81 regardless of the code growth.
82 Phase 2 is an iterative process. During each iteration, we also check
83 if an indirect callsite is promoted and inlined in the profiling run.
84 If yes, vpt will happen to force promote it and in the next iteration,
85 einline will inline the promoted callsite in the next iteration.
87 Phase 3: Annotate control flow graph.
88 AutoFDO uses a separate pass to:
89 * Annotate basic block count
90 * Estimate branch probability
92 After the above 3 phases, all profile is readily annotated on the GCC IR.
93 AutoFDO tries to reuse all FDO infrastructure as much as possible to make
94 use of the profile. E.g. it uses existing mechanism to calculate the basic
95 block/edge frequency, as well as the cgraph node/edge count.
98 #define DEFAULT_AUTO_PROFILE_FILE "fbdata.afdo"
99 #define AUTO_PROFILE_VERSION 1
104 /* Intermediate edge info used when propagating AutoFDO profile information.
105 We can't edge->count() directly since it's computed from edge's probability
106 while probability is yet not decided during propagation. */
107 #define AFDO_EINFO(e) ((struct edge_info *) e->aux)
111 edge_info () : count_ (profile_count::zero ().afdo ()), annotated_ (false) {}
112 bool is_annotated () const { return annotated_
; }
113 void set_annotated () { annotated_
= true; }
114 profile_count
get_count () const { return count_
; }
115 void set_count (profile_count count
) { count_
= count
; }
117 profile_count count_
;
121 /* Represent a source location: (function_decl, lineno). */
122 typedef std::pair
<tree
, unsigned> decl_lineno
;
124 /* Represent an inline stack. vector[0] is the leaf node. */
125 typedef auto_vec
<decl_lineno
> inline_stack
;
127 /* String array that stores function names. */
128 typedef auto_vec
<char *> string_vector
;
130 /* Map from function name's index in string_table to target's
132 typedef std::map
<unsigned, gcov_type
> icall_target_map
;
134 /* Set of gimple stmts. Used to track if the stmt has already been promoted
136 typedef std::set
<gimple
*> stmt_set
;
138 /* Represent count info of an inline stack. */
141 /* Sampled count of the inline stack. */
144 /* Map from indirect call target to its sample count. */
145 icall_target_map targets
;
147 /* Whether this inline stack is already used in annotation.
149 Each inline stack should only be used to annotate IR once.
150 This will be enforced when instruction-level discriminator
155 /* operator< for "const char *". */
156 struct string_compare
158 bool operator()(const char *a
, const char *b
) const
160 return strcmp (a
, b
) < 0;
164 /* Store a string array, indexed by string position in the array. */
173 /* For a given string, returns its index. */
174 int get_index (const char *name
) const;
176 /* For a given decl, returns the index of the decl name. */
177 int get_index_by_decl (tree decl
) const;
179 /* For a given index, returns the string. */
180 const char *get_name (int index
) const;
182 /* Read profile, return TRUE on success. */
186 typedef std::map
<const char *, unsigned, string_compare
> string_index_map
;
187 string_vector vector_
;
188 string_index_map map_
;
191 /* Profile of a function instance:
192 1. total_count of the function.
193 2. head_count (entry basic block count) of the function (only valid when
194 function is a top-level function_instance, i.e. it is the original copy
195 instead of the inlined copy).
196 3. map from source location (decl_lineno) to profile (count_info).
197 4. map from callsite to callee function_instance. */
198 class function_instance
201 typedef auto_vec
<function_instance
*> function_instance_stack
;
203 /* Read the profile and return a function_instance with head count as
204 HEAD_COUNT. Recursively read callsites to create nested function_instances
205 too. STACK is used to track the recursive creation process. */
206 static function_instance
*
207 read_function_instance (function_instance_stack
*stack
,
208 gcov_type head_count
);
210 /* Recursively deallocate all callsites (nested function_instances). */
211 ~function_instance ();
230 /* Traverse callsites of the current function_instance to find one at the
231 location of LINENO and callee name represented in DECL. */
232 function_instance
*get_function_instance_by_decl (unsigned lineno
,
235 /* Store the profile info for LOC in INFO. Return TRUE if profile info
237 bool get_count_info (location_t loc
, count_info
*info
) const;
239 /* Read the inlined indirect call target profile for STMT and store it in
240 MAP, return the total count for all inlined indirect calls. */
241 gcov_type
find_icall_target_map (gcall
*stmt
, icall_target_map
*map
) const;
243 /* Sum of counts that is used during annotation. */
244 gcov_type
total_annotated_count () const;
246 /* Mark LOC as annotated. */
247 void mark_annotated (location_t loc
);
250 /* Callsite, represented as (decl_lineno, callee_function_name_index). */
251 typedef std::pair
<unsigned, unsigned> callsite
;
253 /* Map from callsite to callee function_instance. */
254 typedef std::map
<callsite
, function_instance
*> callsite_map
;
256 function_instance (unsigned name
, gcov_type head_count
)
257 : name_ (name
), total_count_ (0), head_count_ (head_count
)
261 /* Map from source location (decl_lineno) to profile (count_info). */
262 typedef std::map
<unsigned, count_info
> position_count_map
;
264 /* function_instance name index in the string_table. */
267 /* Total sample count. */
268 gcov_type total_count_
;
270 /* Entry BB's sample count. */
271 gcov_type head_count_
;
273 /* Map from callsite location to callee function_instance. */
274 callsite_map callsites
;
276 /* Map from source location to count_info. */
277 position_count_map pos_counts
;
280 /* Profile for all functions. */
281 class autofdo_source_profile
284 static autofdo_source_profile
*
287 autofdo_source_profile
*map
= new autofdo_source_profile ();
295 ~autofdo_source_profile ();
297 /* For a given DECL, returns the top-level function_instance. */
298 function_instance
*get_function_instance_by_decl (tree decl
) const;
300 /* Find count_info for a given gimple STMT. If found, store the count_info
301 in INFO and return true; otherwise return false. */
302 bool get_count_info (gimple
*stmt
, count_info
*info
) const;
304 /* Find total count of the callee of EDGE. */
305 gcov_type
get_callsite_total_count (struct cgraph_edge
*edge
) const;
307 /* Update value profile INFO for STMT from the inlined indirect callsite.
308 Return true if INFO is updated. */
309 bool update_inlined_ind_target (gcall
*stmt
, count_info
*info
);
311 /* Mark LOC as annotated. */
312 void mark_annotated (location_t loc
);
315 /* Map from function_instance name index (in string_table) to
316 function_instance. */
317 typedef std::map
<unsigned, function_instance
*> name_function_instance_map
;
319 autofdo_source_profile () {}
321 /* Read AutoFDO profile and returns TRUE on success. */
324 /* Return the function_instance in the profile that correspond to the
327 get_function_instance_by_inline_stack (const inline_stack
&stack
) const;
329 name_function_instance_map map_
;
332 /* Store the strings read from the profile data file. */
333 static string_table
*afdo_string_table
;
335 /* Store the AutoFDO source profile. */
336 static autofdo_source_profile
*afdo_source_profile
;
338 /* gcov_summary structure to store the profile_info. */
339 static gcov_summary
*afdo_profile_info
;
341 /* Helper functions. */
343 /* Return the original name of NAME: strip the suffix that starts
344 with '.' Caller is responsible for freeing RET. */
347 get_original_name (const char *name
)
349 char *ret
= xstrdup (name
);
350 char *find
= strchr (ret
, '.');
356 /* Return the combined location, which is a 32bit integer in which
357 higher 16 bits stores the line offset of LOC to the start lineno
358 of DECL, The lower 16 bits stores the discriminator. */
361 get_combined_location (location_t loc
, tree decl
)
363 /* TODO: allow more bits for line and less bits for discriminator. */
364 if (LOCATION_LINE (loc
) - DECL_SOURCE_LINE (decl
) >= (1<<16))
365 warning_at (loc
, OPT_Woverflow
, "offset exceeds 16 bytes");
366 return ((LOCATION_LINE (loc
) - DECL_SOURCE_LINE (decl
)) << 16);
369 /* Return the function decl of a given lexical BLOCK. */
372 get_function_decl_from_block (tree block
)
374 if (!inlined_function_outer_scope_p (block
))
377 return BLOCK_ABSTRACT_ORIGIN (block
);
380 /* Store inline stack for STMT in STACK. */
383 get_inline_stack (location_t locus
, inline_stack
*stack
)
385 if (LOCATION_LOCUS (locus
) == UNKNOWN_LOCATION
)
388 tree block
= LOCATION_BLOCK (locus
);
389 if (block
&& TREE_CODE (block
) == BLOCK
)
392 for (block
= BLOCK_SUPERCONTEXT (block
);
393 block
&& (TREE_CODE (block
) == BLOCK
);
394 block
= BLOCK_SUPERCONTEXT (block
))
396 location_t tmp_locus
= BLOCK_SOURCE_LOCATION (block
);
397 if (LOCATION_LOCUS (tmp_locus
) == UNKNOWN_LOCATION
)
400 tree decl
= get_function_decl_from_block (block
);
402 std::make_pair (decl
, get_combined_location (locus
, decl
)));
408 std::make_pair (current_function_decl
,
409 get_combined_location (locus
, current_function_decl
)));
412 /* Return STMT's combined location, which is a 32bit integer in which
413 higher 16 bits stores the line offset of LOC to the start lineno
414 of DECL, The lower 16 bits stores the discriminator. */
417 get_relative_location_for_stmt (gimple
*stmt
)
419 location_t locus
= gimple_location (stmt
);
420 if (LOCATION_LOCUS (locus
) == UNKNOWN_LOCATION
)
421 return UNKNOWN_LOCATION
;
423 for (tree block
= gimple_block (stmt
); block
&& (TREE_CODE (block
) == BLOCK
);
424 block
= BLOCK_SUPERCONTEXT (block
))
425 if (LOCATION_LOCUS (BLOCK_SOURCE_LOCATION (block
)) != UNKNOWN_LOCATION
)
426 return get_combined_location (locus
,
427 get_function_decl_from_block (block
));
428 return get_combined_location (locus
, current_function_decl
);
431 /* Return true if BB contains indirect call. */
434 has_indirect_call (basic_block bb
)
436 gimple_stmt_iterator gsi
;
438 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
440 gimple
*stmt
= gsi_stmt (gsi
);
441 if (gimple_code (stmt
) == GIMPLE_CALL
&& !gimple_call_internal_p (stmt
)
442 && (gimple_call_fn (stmt
) == NULL
443 || TREE_CODE (gimple_call_fn (stmt
)) != FUNCTION_DECL
))
449 /* Member functions for string_table. */
453 string_table::~string_table ()
455 for (unsigned i
= 0; i
< vector_
.length (); i
++)
460 /* Return the index of a given function NAME. Return -1 if NAME is not
461 found in string table. */
464 string_table::get_index (const char *name
) const
468 string_index_map::const_iterator iter
= map_
.find (name
);
469 if (iter
== map_
.end ())
475 /* Return the index of a given function DECL. Return -1 if DECL is not
476 found in string table. */
479 string_table::get_index_by_decl (tree decl
) const
482 = get_original_name (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)));
483 int ret
= get_index (name
);
487 ret
= get_index (lang_hooks
.dwarf_name (decl
, 0));
490 if (DECL_FROM_INLINE (decl
))
491 return get_index_by_decl (DECL_ABSTRACT_ORIGIN (decl
));
496 /* Return the function name of a given INDEX. */
499 string_table::get_name (int index
) const
501 gcc_assert (index
> 0 && index
< (int)vector_
.length ());
502 return vector_
[index
];
505 /* Read the string table. Return TRUE if reading is successful. */
508 string_table::read ()
510 if (gcov_read_unsigned () != GCOV_TAG_AFDO_FILE_NAMES
)
512 /* Skip the length of the section. */
513 gcov_read_unsigned ();
514 /* Read in the file name table. */
515 unsigned string_num
= gcov_read_unsigned ();
516 for (unsigned i
= 0; i
< string_num
; i
++)
518 vector_
.safe_push (get_original_name (gcov_read_string ()));
519 map_
[vector_
.last ()] = i
;
524 /* Member functions for function_instance. */
526 function_instance::~function_instance ()
528 for (callsite_map::iterator iter
= callsites
.begin ();
529 iter
!= callsites
.end (); ++iter
)
533 /* Traverse callsites of the current function_instance to find one at the
534 location of LINENO and callee name represented in DECL. */
537 function_instance::get_function_instance_by_decl (unsigned lineno
,
540 int func_name_idx
= afdo_string_table
->get_index_by_decl (decl
);
541 if (func_name_idx
!= -1)
543 callsite_map::const_iterator ret
544 = callsites
.find (std::make_pair (lineno
, func_name_idx
));
545 if (ret
!= callsites
.end ())
549 = afdo_string_table
->get_index (lang_hooks
.dwarf_name (decl
, 0));
550 if (func_name_idx
!= -1)
552 callsite_map::const_iterator ret
553 = callsites
.find (std::make_pair (lineno
, func_name_idx
));
554 if (ret
!= callsites
.end ())
557 if (DECL_FROM_INLINE (decl
))
558 return get_function_instance_by_decl (lineno
, DECL_ABSTRACT_ORIGIN (decl
));
563 /* Store the profile info for LOC in INFO. Return TRUE if profile info
567 function_instance::get_count_info (location_t loc
, count_info
*info
) const
569 position_count_map::const_iterator iter
= pos_counts
.find (loc
);
570 if (iter
== pos_counts
.end ())
572 *info
= iter
->second
;
576 /* Mark LOC as annotated. */
579 function_instance::mark_annotated (location_t loc
)
581 position_count_map::iterator iter
= pos_counts
.find (loc
);
582 if (iter
== pos_counts
.end ())
584 iter
->second
.annotated
= true;
587 /* Read the inlined indirect call target profile for STMT and store it in
588 MAP, return the total count for all inlined indirect calls. */
591 function_instance::find_icall_target_map (gcall
*stmt
,
592 icall_target_map
*map
) const
595 unsigned stmt_offset
= get_relative_location_for_stmt (stmt
);
597 for (callsite_map::const_iterator iter
= callsites
.begin ();
598 iter
!= callsites
.end (); ++iter
)
600 unsigned callee
= iter
->second
->name ();
601 /* Check if callsite location match the stmt. */
602 if (iter
->first
.first
!= stmt_offset
)
604 struct cgraph_node
*node
= cgraph_node::get_for_asmname (
605 get_identifier (afdo_string_table
->get_name (callee
)));
608 if (!check_ic_target (stmt
, node
))
610 (*map
)[callee
] = iter
->second
->total_count ();
611 ret
+= iter
->second
->total_count ();
616 /* Read the profile and create a function_instance with head count as
617 HEAD_COUNT. Recursively read callsites to create nested function_instances
618 too. STACK is used to track the recursive creation process. */
620 /* function instance profile format:
624 NUM_POS_COUNTS: 4 bytes
625 NUM_CALLSITES: 4 byte
627 POS_1_OFFSET: 4 bytes
631 VALUE_PROFILE_TYPE: 4 bytes
641 CALLSITE_1_OFFSET: 4 bytes
642 FUNCTION_INSTANCE_PROFILE (nested)
648 function_instance::read_function_instance (function_instance_stack
*stack
,
649 gcov_type head_count
)
651 unsigned name
= gcov_read_unsigned ();
652 unsigned num_pos_counts
= gcov_read_unsigned ();
653 unsigned num_callsites
= gcov_read_unsigned ();
654 function_instance
*s
= new function_instance (name
, head_count
);
655 stack
->safe_push (s
);
657 for (unsigned i
= 0; i
< num_pos_counts
; i
++)
659 unsigned offset
= gcov_read_unsigned () & 0xffff0000;
660 unsigned num_targets
= gcov_read_unsigned ();
661 gcov_type count
= gcov_read_counter ();
662 s
->pos_counts
[offset
].count
= count
;
663 for (unsigned j
= 0; j
< stack
->length (); j
++)
664 (*stack
)[j
]->total_count_
+= count
;
665 for (unsigned j
= 0; j
< num_targets
; j
++)
667 /* Only indirect call target histogram is supported now. */
668 gcov_read_unsigned ();
669 gcov_type target_idx
= gcov_read_counter ();
670 s
->pos_counts
[offset
].targets
[target_idx
] = gcov_read_counter ();
673 for (unsigned i
= 0; i
< num_callsites
; i
++)
675 unsigned offset
= gcov_read_unsigned ();
676 function_instance
*callee_function_instance
677 = read_function_instance (stack
, 0);
678 s
->callsites
[std::make_pair (offset
, callee_function_instance
->name ())]
679 = callee_function_instance
;
685 /* Sum of counts that is used during annotation. */
688 function_instance::total_annotated_count () const
691 for (callsite_map::const_iterator iter
= callsites
.begin ();
692 iter
!= callsites
.end (); ++iter
)
693 ret
+= iter
->second
->total_annotated_count ();
694 for (position_count_map::const_iterator iter
= pos_counts
.begin ();
695 iter
!= pos_counts
.end (); ++iter
)
696 if (iter
->second
.annotated
)
697 ret
+= iter
->second
.count
;
701 /* Member functions for autofdo_source_profile. */
703 autofdo_source_profile::~autofdo_source_profile ()
705 for (name_function_instance_map::const_iterator iter
= map_
.begin ();
706 iter
!= map_
.end (); ++iter
)
710 /* For a given DECL, returns the top-level function_instance. */
713 autofdo_source_profile::get_function_instance_by_decl (tree decl
) const
715 int index
= afdo_string_table
->get_index_by_decl (decl
);
718 name_function_instance_map::const_iterator ret
= map_
.find (index
);
719 return ret
== map_
.end () ? NULL
: ret
->second
;
722 /* Find count_info for a given gimple STMT. If found, store the count_info
723 in INFO and return true; otherwise return false. */
726 autofdo_source_profile::get_count_info (gimple
*stmt
, count_info
*info
) const
728 if (LOCATION_LOCUS (gimple_location (stmt
)) == cfun
->function_end_locus
)
732 get_inline_stack (gimple_location (stmt
), &stack
);
733 if (stack
.length () == 0)
735 function_instance
*s
= get_function_instance_by_inline_stack (stack
);
738 return s
->get_count_info (stack
[0].second
, info
);
741 /* Mark LOC as annotated. */
744 autofdo_source_profile::mark_annotated (location_t loc
)
747 get_inline_stack (loc
, &stack
);
748 if (stack
.length () == 0)
750 function_instance
*s
= get_function_instance_by_inline_stack (stack
);
753 s
->mark_annotated (stack
[0].second
);
756 /* Update value profile INFO for STMT from the inlined indirect callsite.
757 Return true if INFO is updated. */
760 autofdo_source_profile::update_inlined_ind_target (gcall
*stmt
,
765 fprintf (dump_file
, "Checking indirect call -> direct call ");
766 print_gimple_stmt (dump_file
, stmt
, 0, TDF_SLIM
);
769 if (LOCATION_LOCUS (gimple_location (stmt
)) == cfun
->function_end_locus
)
772 fprintf (dump_file
, " good locus\n");
777 get_count_info (stmt
, &old_info
);
779 for (icall_target_map::const_iterator iter
= old_info
.targets
.begin ();
780 iter
!= old_info
.targets
.end (); ++iter
)
781 total
+= iter
->second
;
783 /* Program behavior changed, original promoted (and inlined) target is not
784 hot any more. Will avoid promote the original target.
786 To check if original promoted target is still hot, we check the total
787 count of the unpromoted targets (stored in TOTAL). If a callsite count
788 (stored in INFO) is smaller than half of the total count, the original
789 promoted target is considered not hot any more. */
790 if (info
->count
< total
/ 2)
793 fprintf (dump_file
, " not hot anymore %ld < %ld",
800 get_inline_stack (gimple_location (stmt
), &stack
);
801 if (stack
.length () == 0)
804 fprintf (dump_file
, " no inline stack\n");
807 function_instance
*s
= get_function_instance_by_inline_stack (stack
);
811 fprintf (dump_file
, " function not found in inline stack\n");
814 icall_target_map map
;
815 if (s
->find_icall_target_map (stmt
, &map
) == 0)
818 fprintf (dump_file
, " no target map\n");
821 for (icall_target_map::const_iterator iter
= map
.begin ();
822 iter
!= map
.end (); ++iter
)
823 info
->targets
[iter
->first
] = iter
->second
;
825 fprintf (dump_file
, " looks good\n");
829 /* Find total count of the callee of EDGE. */
832 autofdo_source_profile::get_callsite_total_count (
833 struct cgraph_edge
*edge
) const
836 stack
.safe_push (std::make_pair (edge
->callee
->decl
, 0));
837 get_inline_stack (gimple_location (edge
->call_stmt
), &stack
);
839 function_instance
*s
= get_function_instance_by_inline_stack (stack
);
841 || afdo_string_table
->get_index (IDENTIFIER_POINTER (
842 DECL_ASSEMBLER_NAME (edge
->callee
->decl
))) != s
->name ())
845 return s
->total_count ();
848 /* Read AutoFDO profile and returns TRUE on success. */
850 /* source profile format:
852 GCOV_TAG_AFDO_FUNCTION: 4 bytes
854 NUM_FUNCTIONS: 4 bytes
858 FUNCTION_INSTANCE_N. */
861 autofdo_source_profile::read ()
863 if (gcov_read_unsigned () != GCOV_TAG_AFDO_FUNCTION
)
865 inform (UNKNOWN_LOCATION
, "Not expected TAG.");
869 /* Skip the length of the section. */
870 gcov_read_unsigned ();
872 /* Read in the function/callsite profile, and store it in local
874 unsigned function_num
= gcov_read_unsigned ();
875 for (unsigned i
= 0; i
< function_num
; i
++)
877 function_instance::function_instance_stack stack
;
878 function_instance
*s
= function_instance::read_function_instance (
879 &stack
, gcov_read_counter ());
880 map_
[s
->name ()] = s
;
885 /* Return the function_instance in the profile that correspond to the
889 autofdo_source_profile::get_function_instance_by_inline_stack (
890 const inline_stack
&stack
) const
892 name_function_instance_map::const_iterator iter
= map_
.find (
893 afdo_string_table
->get_index_by_decl (stack
[stack
.length () - 1].first
));
894 if (iter
== map_
.end())
896 function_instance
*s
= iter
->second
;
897 for (unsigned i
= stack
.length() - 1; i
> 0; i
--)
899 s
= s
->get_function_instance_by_decl (
900 stack
[i
].second
, stack
[i
- 1].first
);
907 /* Module profile is only used by LIPO. Here we simply ignore it. */
910 fake_read_autofdo_module_profile ()
912 /* Read in the module info. */
913 gcov_read_unsigned ();
915 /* Skip the length of the section. */
916 gcov_read_unsigned ();
918 /* Read in the file name table. */
919 unsigned total_module_num
= gcov_read_unsigned ();
920 gcc_assert (total_module_num
== 0);
923 /* Read data from profile data file. */
928 if (gcov_open (auto_profile_file
, 1) == 0)
930 error ("cannot open profile file %s", auto_profile_file
);
934 if (gcov_read_unsigned () != GCOV_DATA_MAGIC
)
936 error ("AutoFDO profile magic number does not match");
940 /* Skip the version number. */
941 unsigned version
= gcov_read_unsigned ();
942 if (version
!= AUTO_PROFILE_VERSION
)
944 error ("AutoFDO profile version %u does match %u",
945 version
, AUTO_PROFILE_VERSION
);
949 /* Skip the empty integer. */
950 gcov_read_unsigned ();
953 afdo_string_table
= new string_table ();
954 if (!afdo_string_table
->read())
956 error ("cannot read string table from %s", auto_profile_file
);
960 /* autofdo_source_profile. */
961 afdo_source_profile
= autofdo_source_profile::create ();
962 if (afdo_source_profile
== NULL
)
964 error ("cannot read function profile from %s", auto_profile_file
);
968 /* autofdo_module_profile. */
969 fake_read_autofdo_module_profile ();
972 /* From AutoFDO profiles, find values inside STMT for that we want to measure
973 histograms for indirect-call optimization.
975 This function is actually served for 2 purposes:
976 * before annotation, we need to mark histogram, promote and inline
977 * after annotation, we just need to mark, and let follow-up logic to
978 decide if it needs to promote and inline. */
981 afdo_indirect_call (gimple_stmt_iterator
*gsi
, const icall_target_map
&map
,
984 gimple
*gs
= gsi_stmt (*gsi
);
987 if (map
.size () == 0)
989 gcall
*stmt
= dyn_cast
<gcall
*> (gs
);
991 || gimple_call_internal_p (stmt
)
992 || gimple_call_fndecl (stmt
) != NULL_TREE
)
996 icall_target_map::const_iterator max_iter
= map
.end ();
998 for (icall_target_map::const_iterator iter
= map
.begin ();
999 iter
!= map
.end (); ++iter
)
1001 total
+= iter
->second
;
1002 if (max_iter
== map
.end () || max_iter
->second
< iter
->second
)
1005 struct cgraph_node
*direct_call
= cgraph_node::get_for_asmname (
1006 get_identifier (afdo_string_table
->get_name (max_iter
->first
)));
1007 if (direct_call
== NULL
|| !direct_call
->profile_id
)
1010 callee
= gimple_call_fn (stmt
);
1012 histogram_value hist
= gimple_alloc_histogram_value (
1013 cfun
, HIST_TYPE_INDIR_CALL
, stmt
, callee
);
1014 hist
->n_counters
= 3;
1015 hist
->hvalue
.counters
= XNEWVEC (gcov_type
, hist
->n_counters
);
1016 gimple_add_histogram_value (cfun
, stmt
, hist
);
1018 hist
->hvalue
.counters
[0] = direct_call
->profile_id
;
1019 hist
->hvalue
.counters
[1] = max_iter
->second
;
1020 hist
->hvalue
.counters
[2] = total
;
1025 struct cgraph_edge
*indirect_edge
1026 = cgraph_node::get (current_function_decl
)->get_edge (stmt
);
1030 fprintf (dump_file
, "Indirect call -> direct call ");
1031 print_generic_expr (dump_file
, callee
, TDF_SLIM
);
1032 fprintf (dump_file
, " => ");
1033 print_generic_expr (dump_file
, direct_call
->decl
, TDF_SLIM
);
1036 if (direct_call
== NULL
|| !check_ic_target (stmt
, direct_call
))
1039 fprintf (dump_file
, " not transforming\n");
1042 if (DECL_STRUCT_FUNCTION (direct_call
->decl
) == NULL
)
1045 fprintf (dump_file
, " no declaration\n");
1051 fprintf (dump_file
, " transformation on insn ");
1052 print_gimple_stmt (dump_file
, stmt
, 0, TDF_SLIM
);
1053 fprintf (dump_file
, "\n");
1056 /* FIXME: Count should be initialized. */
1057 struct cgraph_edge
*new_edge
1058 = indirect_edge
->make_speculative (direct_call
,
1059 profile_count::uninitialized ());
1060 new_edge
->redirect_call_stmt_to_callee ();
1061 gimple_remove_histogram_value (cfun
, stmt
, hist
);
1062 inline_call (new_edge
, true, NULL
, NULL
, false);
1065 /* From AutoFDO profiles, find values inside STMT for that we want to measure
1066 histograms and adds them to list VALUES. */
1069 afdo_vpt (gimple_stmt_iterator
*gsi
, const icall_target_map
&map
,
1072 afdo_indirect_call (gsi
, map
, transform
);
1075 typedef std::set
<basic_block
> bb_set
;
1076 typedef std::set
<edge
> edge_set
;
1079 is_bb_annotated (const basic_block bb
, const bb_set
&annotated
)
1081 return annotated
.find (bb
) != annotated
.end ();
1085 set_bb_annotated (basic_block bb
, bb_set
*annotated
)
1087 annotated
->insert (bb
);
1090 /* For a given BB, set its execution count. Attach value profile if a stmt
1091 is not in PROMOTED, because we only want to promote an indirect call once.
1092 Return TRUE if BB is annotated. */
1095 afdo_set_bb_count (basic_block bb
, const stmt_set
&promoted
)
1097 gimple_stmt_iterator gsi
;
1100 gcov_type max_count
= 0;
1101 bool has_annotated
= false;
1103 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1106 gimple
*stmt
= gsi_stmt (gsi
);
1107 if (gimple_clobber_p (stmt
) || is_gimple_debug (stmt
))
1109 if (afdo_source_profile
->get_count_info (stmt
, &info
))
1111 if (info
.count
> max_count
)
1112 max_count
= info
.count
;
1113 has_annotated
= true;
1114 if (info
.targets
.size () > 0
1115 && promoted
.find (stmt
) == promoted
.end ())
1116 afdo_vpt (&gsi
, info
.targets
, false);
1123 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1124 afdo_source_profile
->mark_annotated (gimple_location (gsi_stmt (gsi
)));
1125 for (gphi_iterator gpi
= gsi_start_phis (bb
);
1129 gphi
*phi
= gpi
.phi ();
1131 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
1132 afdo_source_profile
->mark_annotated (gimple_phi_arg_location (phi
, i
));
1134 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1135 afdo_source_profile
->mark_annotated (e
->goto_locus
);
1137 bb
->count
= profile_count::from_gcov_type (max_count
).afdo ();
1141 /* BB1 and BB2 are in an equivalent class iff:
1142 1. BB1 dominates BB2.
1143 2. BB2 post-dominates BB1.
1144 3. BB1 and BB2 are in the same loop nest.
1145 This function finds the equivalent class for each basic block, and
1146 stores a pointer to the first BB in its equivalent class. Meanwhile,
1147 set bb counts for the same equivalent class to be idenical. Update
1148 ANNOTATED_BB for the first BB in its equivalent class. */
1151 afdo_find_equiv_class (bb_set
*annotated_bb
)
1155 FOR_ALL_BB_FN (bb
, cfun
)
1158 FOR_ALL_BB_FN (bb
, cfun
)
1160 vec
<basic_block
> dom_bbs
;
1164 if (bb
->aux
!= NULL
)
1167 dom_bbs
= get_dominated_by (CDI_DOMINATORS
, bb
);
1168 FOR_EACH_VEC_ELT (dom_bbs
, i
, bb1
)
1169 if (bb1
->aux
== NULL
&& dominated_by_p (CDI_POST_DOMINATORS
, bb
, bb1
)
1170 && bb1
->loop_father
== bb
->loop_father
)
1173 if (bb1
->count
> bb
->count
&& is_bb_annotated (bb1
, *annotated_bb
))
1175 bb
->count
= bb1
->count
;
1176 set_bb_annotated (bb
, annotated_bb
);
1179 dom_bbs
= get_dominated_by (CDI_POST_DOMINATORS
, bb
);
1180 FOR_EACH_VEC_ELT (dom_bbs
, i
, bb1
)
1181 if (bb1
->aux
== NULL
&& dominated_by_p (CDI_DOMINATORS
, bb
, bb1
)
1182 && bb1
->loop_father
== bb
->loop_father
)
1185 if (bb1
->count
> bb
->count
&& is_bb_annotated (bb1
, *annotated_bb
))
1187 bb
->count
= bb1
->count
;
1188 set_bb_annotated (bb
, annotated_bb
);
1194 /* If a basic block's count is known, and only one of its in/out edges' count
1195 is unknown, its count can be calculated. Meanwhile, if all of the in/out
1196 edges' counts are known, then the basic block's unknown count can also be
1198 IS_SUCC is true if out edges of a basic blocks are examined.
1199 Update ANNOTATED_BB accordingly.
1200 Return TRUE if any basic block/edge count is changed. */
1203 afdo_propagate_edge (bool is_succ
, bb_set
*annotated_bb
)
1206 bool changed
= false;
1208 FOR_EACH_BB_FN (bb
, cfun
)
1210 edge e
, unknown_edge
= NULL
;
1212 int num_unknown_edge
= 0;
1213 profile_count total_known_count
= profile_count::zero ().afdo ();
1215 FOR_EACH_EDGE (e
, ei
, is_succ
? bb
->succs
: bb
->preds
)
1217 gcc_assert (AFDO_EINFO (e
) != NULL
);
1218 if (! AFDO_EINFO (e
)->is_annotated ())
1219 num_unknown_edge
++, unknown_edge
= e
;
1221 total_known_count
+= AFDO_EINFO (e
)->get_count ();
1224 /* Be careful not to annotate block with no successor in special cases. */
1225 if (num_unknown_edge
== 0 && total_known_count
> bb
->count
)
1227 bb
->count
= total_known_count
;
1228 if (!is_bb_annotated (bb
, *annotated_bb
))
1229 set_bb_annotated (bb
, annotated_bb
);
1232 else if (num_unknown_edge
== 1 && is_bb_annotated (bb
, *annotated_bb
))
1234 if (bb
->count
> total_known_count
)
1235 AFDO_EINFO (unknown_edge
)->set_count (bb
->count
- total_known_count
);
1237 AFDO_EINFO (unknown_edge
)->set_count (profile_count::zero().afdo ());
1238 AFDO_EINFO (unknown_edge
)->set_annotated ();
1245 /* Special propagation for circuit expressions. Because GCC translates
1246 control flow into data flow for circuit expressions. E.g.
1253 will be translated into:
1268 tmp = PHI (0 (BB1), 0 (BB.t1), 1 (BB.t2)
1274 In this case, we need to propagate through PHI to determine the edge
1275 count of BB1->BB.t1, BB.t1->BB.t2. */
1278 afdo_propagate_circuit (const bb_set
&annotated_bb
)
1281 FOR_ALL_BB_FN (bb
, cfun
)
1284 tree cmp_rhs
, cmp_lhs
;
1285 gimple
*cmp_stmt
= last_stmt (bb
);
1289 if (!cmp_stmt
|| gimple_code (cmp_stmt
) != GIMPLE_COND
)
1291 cmp_rhs
= gimple_cond_rhs (cmp_stmt
);
1292 cmp_lhs
= gimple_cond_lhs (cmp_stmt
);
1293 if (!TREE_CONSTANT (cmp_rhs
)
1294 || !(integer_zerop (cmp_rhs
) || integer_onep (cmp_rhs
)))
1296 if (TREE_CODE (cmp_lhs
) != SSA_NAME
)
1298 if (!is_bb_annotated (bb
, annotated_bb
))
1300 def_stmt
= SSA_NAME_DEF_STMT (cmp_lhs
);
1301 while (def_stmt
&& gimple_code (def_stmt
) == GIMPLE_ASSIGN
1302 && gimple_assign_single_p (def_stmt
)
1303 && TREE_CODE (gimple_assign_rhs1 (def_stmt
)) == SSA_NAME
)
1304 def_stmt
= SSA_NAME_DEF_STMT (gimple_assign_rhs1 (def_stmt
));
1307 gphi
*phi_stmt
= dyn_cast
<gphi
*> (def_stmt
);
1310 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1312 unsigned i
, total
= 0;
1314 bool check_value_one
= (((integer_onep (cmp_rhs
))
1315 ^ (gimple_cond_code (cmp_stmt
) == EQ_EXPR
))
1316 ^ ((e
->flags
& EDGE_TRUE_VALUE
) != 0));
1317 if (! AFDO_EINFO (e
)->is_annotated ())
1319 for (i
= 0; i
< gimple_phi_num_args (phi_stmt
); i
++)
1321 tree val
= gimple_phi_arg_def (phi_stmt
, i
);
1322 edge ep
= gimple_phi_arg_edge (phi_stmt
, i
);
1324 if (!TREE_CONSTANT (val
)
1325 || !(integer_zerop (val
) || integer_onep (val
)))
1327 if (check_value_one
^ integer_onep (val
))
1331 if (! (AFDO_EINFO (e
)->get_count ()).nonzero_p ()
1332 && ! AFDO_EINFO (ep
)->is_annotated ())
1334 AFDO_EINFO (ep
)->set_count (profile_count::zero ().afdo ());
1335 AFDO_EINFO (ep
)->set_annotated ();
1338 if (total
== 1 && ! AFDO_EINFO (only_one
)->is_annotated ())
1340 AFDO_EINFO (only_one
)->set_count (AFDO_EINFO (e
)->get_count ());
1341 AFDO_EINFO (only_one
)->set_annotated ();
1347 /* Propagate the basic block count and edge count on the control flow
1348 graph. We do the propagation iteratively until stablize. */
1351 afdo_propagate (bb_set
*annotated_bb
)
1354 bool changed
= true;
1357 FOR_ALL_BB_FN (bb
, cfun
)
1359 bb
->count
= ((basic_block
)bb
->aux
)->count
;
1360 if (is_bb_annotated ((basic_block
)bb
->aux
, *annotated_bb
))
1361 set_bb_annotated (bb
, annotated_bb
);
1364 while (changed
&& i
++ < 10)
1368 if (afdo_propagate_edge (true, annotated_bb
))
1370 if (afdo_propagate_edge (false, annotated_bb
))
1372 afdo_propagate_circuit (*annotated_bb
);
1376 /* Propagate counts on control flow graph and calculate branch
1380 afdo_calculate_branch_prob (bb_set
*annotated_bb
)
1386 calculate_dominance_info (CDI_POST_DOMINATORS
);
1387 calculate_dominance_info (CDI_DOMINATORS
);
1388 loop_optimizer_init (0);
1390 FOR_ALL_BB_FN (bb
, cfun
)
1392 gcc_assert (bb
->aux
== NULL
);
1393 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1395 gcc_assert (e
->aux
== NULL
);
1396 e
->aux
= new edge_info ();
1400 afdo_find_equiv_class (annotated_bb
);
1401 afdo_propagate (annotated_bb
);
1403 FOR_EACH_BB_FN (bb
, cfun
)
1405 int num_unknown_succ
= 0;
1406 profile_count total_count
= profile_count::zero ().afdo ();
1408 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1410 gcc_assert (AFDO_EINFO (e
) != NULL
);
1411 if (! AFDO_EINFO (e
)->is_annotated ())
1414 total_count
+= AFDO_EINFO (e
)->get_count ();
1416 if (num_unknown_succ
== 0 && total_count
> profile_count::zero ())
1418 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1420 = AFDO_EINFO (e
)->get_count ().probability_in (total_count
);
1423 FOR_ALL_BB_FN (bb
, cfun
)
1426 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
1427 if (AFDO_EINFO (e
) != NULL
)
1429 delete AFDO_EINFO (e
);
1434 loop_optimizer_finalize ();
1435 free_dominance_info (CDI_DOMINATORS
);
1436 free_dominance_info (CDI_POST_DOMINATORS
);
1439 /* Perform value profile transformation using AutoFDO profile. Add the
1440 promoted stmts to PROMOTED_STMTS. Return TRUE if there is any
1441 indirect call promoted. */
1444 afdo_vpt_for_early_inline (stmt_set
*promoted_stmts
)
1447 if (afdo_source_profile
->get_function_instance_by_decl (
1448 current_function_decl
) == NULL
)
1451 compute_fn_summary (cgraph_node::get (current_function_decl
), true);
1453 bool has_vpt
= false;
1454 FOR_EACH_BB_FN (bb
, cfun
)
1456 if (!has_indirect_call (bb
))
1458 gimple_stmt_iterator gsi
;
1460 gcov_type bb_count
= 0;
1461 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1464 gimple
*stmt
= gsi_stmt (gsi
);
1465 if (afdo_source_profile
->get_count_info (stmt
, &info
))
1466 bb_count
= MAX (bb_count
, info
.count
);
1469 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1471 gcall
*stmt
= dyn_cast
<gcall
*> (gsi_stmt (gsi
));
1472 /* IC_promotion and early_inline_2 is done in multiple iterations.
1473 No need to promoted the stmt if its in promoted_stmts (means
1474 it is already been promoted in the previous iterations). */
1475 if ((!stmt
) || gimple_call_fn (stmt
) == NULL
1476 || TREE_CODE (gimple_call_fn (stmt
)) == FUNCTION_DECL
1477 || promoted_stmts
->find (stmt
) != promoted_stmts
->end ())
1481 afdo_source_profile
->get_count_info (stmt
, &info
);
1482 info
.count
= bb_count
;
1483 if (afdo_source_profile
->update_inlined_ind_target (stmt
, &info
))
1485 /* Promote the indirect call and update the promoted_stmts. */
1486 promoted_stmts
->insert (stmt
);
1487 afdo_vpt (&gsi
, info
.targets
, true);
1495 unsigned todo
= optimize_inline_calls (current_function_decl
);
1496 if (todo
& TODO_update_ssa_any
)
1497 update_ssa (TODO_update_ssa
);
1504 /* Annotate auto profile to the control flow graph. Do not annotate value
1505 profile for stmts in PROMOTED_STMTS. */
1508 afdo_annotate_cfg (const stmt_set
&promoted_stmts
)
1511 bb_set annotated_bb
;
1512 const function_instance
*s
1513 = afdo_source_profile
->get_function_instance_by_decl (
1514 current_function_decl
);
1518 cgraph_node::get (current_function_decl
)->count
1519 = profile_count::from_gcov_type (s
->head_count ()).afdo ();
1520 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
1521 = profile_count::from_gcov_type (s
->head_count ()).afdo ();
1522 EXIT_BLOCK_PTR_FOR_FN (cfun
)->count
= profile_count::zero ().afdo ();
1523 profile_count max_count
= ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
;
1525 FOR_EACH_BB_FN (bb
, cfun
)
1527 /* As autoFDO uses sampling approach, we have to assume that all
1528 counters are zero when not seen by autoFDO. */
1529 bb
->count
= profile_count::zero ().afdo ();
1530 if (afdo_set_bb_count (bb
, promoted_stmts
))
1531 set_bb_annotated (bb
, &annotated_bb
);
1532 if (bb
->count
> max_count
)
1533 max_count
= bb
->count
;
1535 if (ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
1536 > ENTRY_BLOCK_PTR_FOR_FN (cfun
)->next_bb
->count
)
1538 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->next_bb
->count
1539 = ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
;
1540 set_bb_annotated (ENTRY_BLOCK_PTR_FOR_FN (cfun
)->next_bb
, &annotated_bb
);
1542 if (ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
1543 > EXIT_BLOCK_PTR_FOR_FN (cfun
)->prev_bb
->count
)
1545 EXIT_BLOCK_PTR_FOR_FN (cfun
)->prev_bb
->count
1546 = ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
;
1547 set_bb_annotated (EXIT_BLOCK_PTR_FOR_FN (cfun
)->prev_bb
, &annotated_bb
);
1549 afdo_source_profile
->mark_annotated (
1550 DECL_SOURCE_LOCATION (current_function_decl
));
1551 afdo_source_profile
->mark_annotated (cfun
->function_start_locus
);
1552 afdo_source_profile
->mark_annotated (cfun
->function_end_locus
);
1553 if (max_count
> profile_count::zero ())
1555 /* Calculate, propagate count and probability information on CFG. */
1556 afdo_calculate_branch_prob (&annotated_bb
);
1558 update_max_bb_count ();
1559 profile_status_for_fn (cfun
) = PROFILE_READ
;
1560 if (flag_value_profile_transformations
)
1562 gimple_value_profile_transformations ();
1563 free_dominance_info (CDI_DOMINATORS
);
1564 free_dominance_info (CDI_POST_DOMINATORS
);
1565 update_ssa (TODO_update_ssa
);
1569 /* Wrapper function to invoke early inliner. */
1574 compute_fn_summary (cgraph_node::get (current_function_decl
), true);
1575 unsigned todo
= early_inliner (cfun
);
1576 if (todo
& TODO_update_ssa_any
)
1577 update_ssa (TODO_update_ssa
);
1580 /* Use AutoFDO profile to annoate the control flow graph.
1581 Return the todo flag. */
1586 struct cgraph_node
*node
;
1588 if (symtab
->state
== FINISHED
)
1591 init_node_map (true);
1592 profile_info
= autofdo::afdo_profile_info
;
1594 FOR_EACH_FUNCTION (node
)
1596 if (!gimple_has_body_p (node
->decl
))
1599 /* Don't profile functions produced for builtin stuff. */
1600 if (DECL_SOURCE_LOCATION (node
->decl
) == BUILTINS_LOCATION
)
1603 push_cfun (DECL_STRUCT_FUNCTION (node
->decl
));
1605 /* First do indirect call promotion and early inline to make the
1606 IR match the profiled binary before actual annotation.
1608 This is needed because an indirect call might have been promoted
1609 and inlined in the profiled binary. If we do not promote and
1610 inline these indirect calls before annotation, the profile for
1611 these promoted functions will be lost.
1613 e.g. foo() --indirect_call--> bar()
1614 In profiled binary, the callsite is promoted and inlined, making
1615 the profile look like:
1625 Before AutoFDO pass, loc_foo_2 is not promoted thus not inlined.
1626 If we perform annotation on it, the profile inside bar@loc_foo2
1629 To avoid this, we promote loc_foo_2 and inline the promoted bar
1630 function before annotation, so the profile inside bar@loc_foo2
1632 autofdo::stmt_set promoted_stmts
;
1633 for (int i
= 0; i
< PARAM_VALUE (PARAM_EARLY_INLINER_MAX_ITERATIONS
); i
++)
1635 if (!flag_value_profile_transformations
1636 || !autofdo::afdo_vpt_for_early_inline (&promoted_stmts
))
1642 autofdo::afdo_annotate_cfg (promoted_stmts
);
1643 compute_function_frequency ();
1645 /* Local pure-const may imply need to fixup the cfg. */
1646 if (execute_fixup_cfg () & TODO_cleanup_cfg
)
1647 cleanup_tree_cfg ();
1649 free_dominance_info (CDI_DOMINATORS
);
1650 free_dominance_info (CDI_POST_DOMINATORS
);
1651 cgraph_edge::rebuild_edges ();
1652 compute_fn_summary (cgraph_node::get (current_function_decl
), true);
1656 return TODO_rebuild_cgraph_edges
;
1658 } /* namespace autofdo. */
1660 /* Read the profile from the profile data file. */
1663 read_autofdo_file (void)
1665 if (auto_profile_file
== NULL
)
1666 auto_profile_file
= DEFAULT_AUTO_PROFILE_FILE
;
1668 autofdo::afdo_profile_info
= XNEW (gcov_summary
);
1669 autofdo::afdo_profile_info
->runs
= 1;
1670 autofdo::afdo_profile_info
->sum_max
= 0;
1672 /* Read the profile from the profile file. */
1673 autofdo::read_profile ();
1676 /* Free the resources. */
1679 end_auto_profile (void)
1681 delete autofdo::afdo_source_profile
;
1682 delete autofdo::afdo_string_table
;
1683 profile_info
= NULL
;
1686 /* Returns TRUE if EDGE is hot enough to be inlined early. */
1689 afdo_callsite_hot_enough_for_early_inline (struct cgraph_edge
*edge
)
1692 = autofdo::afdo_source_profile
->get_callsite_total_count (edge
);
1697 profile_count pcount
= profile_count::from_gcov_type (count
).afdo ();
1698 gcov_summary
*saved_profile_info
= profile_info
;
1699 /* At early inline stage, profile_info is not set yet. We need to
1700 temporarily set it to afdo_profile_info to calculate hotness. */
1701 profile_info
= autofdo::afdo_profile_info
;
1702 is_hot
= maybe_hot_count_p (NULL
, pcount
);
1703 profile_info
= saved_profile_info
;
1713 const pass_data pass_data_ipa_auto_profile
= {
1714 SIMPLE_IPA_PASS
, "afdo", /* name */
1715 OPTGROUP_NONE
, /* optinfo_flags */
1716 TV_IPA_AUTOFDO
, /* tv_id */
1717 0, /* properties_required */
1718 0, /* properties_provided */
1719 0, /* properties_destroyed */
1720 0, /* todo_flags_start */
1721 0, /* todo_flags_finish */
1724 class pass_ipa_auto_profile
: public simple_ipa_opt_pass
1727 pass_ipa_auto_profile (gcc::context
*ctxt
)
1728 : simple_ipa_opt_pass (pass_data_ipa_auto_profile
, ctxt
)
1732 /* opt_pass methods: */
1736 return flag_auto_profile
;
1738 virtual unsigned int
1739 execute (function
*)
1741 return autofdo::auto_profile ();
1743 }; // class pass_ipa_auto_profile
1747 simple_ipa_opt_pass
*
1748 make_pass_ipa_auto_profile (gcc::context
*ctxt
)
1750 return new pass_ipa_auto_profile (ctxt
);