1 /* Definitions for transformations based on profile information for values.
2 Copyright (C) 2003-2019 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_VALUE_PROF_H
21 #define GCC_VALUE_PROF_H
23 /* Supported histogram types. */
26 HIST_TYPE_INTERVAL
, /* Measures histogram of values inside a specified
28 HIST_TYPE_POW2
, /* Histogram of power of 2 values. */
29 HIST_TYPE_TOPN_VALUES
, /* Tries to identify the N most common values. */
30 HIST_TYPE_INDIR_CALL
, /* Tries to identify the function that is (almost)
31 called in indirect call */
32 HIST_TYPE_AVERAGE
, /* Compute average value (sum of all values). */
33 HIST_TYPE_IOR
, /* Used to compute expected alignment. */
34 HIST_TYPE_TIME_PROFILE
, /* Used for time profile */
38 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
39 #define HIST_TYPE_FOR_COUNTER(COUNTER) \
40 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
43 /* The value to measure. */
44 struct histogram_value_t
48 tree value
; /* The value to profile. */
49 gimple
*stmt
; /* Insn containing the value. */
50 gcov_type
*counters
; /* Pointer to first counter. */
51 struct histogram_value_t
*next
; /* Linked list pointer. */
53 enum hist_type type
; /* Type of information to measure. */
54 unsigned n_counters
; /* Number of required counters. */
60 int int_start
; /* First value in interval. */
61 unsigned int steps
; /* Number of values in it. */
62 } intvl
; /* Interval histogram data. */
63 } hdata
; /* Profiled information specific data. */
66 typedef struct histogram_value_t
*histogram_value
;
67 typedef const struct histogram_value_t
*const_histogram_value
;
70 typedef vec
<histogram_value
> histogram_values
;
72 extern void gimple_find_values_to_profile (histogram_values
*);
73 extern bool gimple_value_profile_transformations (void);
75 histogram_value
gimple_alloc_histogram_value (struct function
*, enum hist_type
,
77 tree value
= NULL_TREE
);
78 histogram_value
gimple_histogram_value (struct function
*, gimple
*);
79 histogram_value
gimple_histogram_value_of_type (struct function
*, gimple
*,
81 void gimple_add_histogram_value (struct function
*, gimple
*, histogram_value
);
82 void dump_histograms_for_stmt (struct function
*, FILE *, gimple
*);
83 void gimple_remove_histogram_value (struct function
*, gimple
*, histogram_value
);
84 void gimple_remove_stmt_histograms (struct function
*, gimple
*);
85 void gimple_duplicate_stmt_histograms (struct function
*, gimple
*,
86 struct function
*, gimple
*);
87 void gimple_move_stmt_histograms (struct function
*, gimple
*, gimple
*);
88 void verify_histograms (void);
89 void free_histograms (function
*);
90 void stringop_block_profile (gimple
*, unsigned int *, HOST_WIDE_INT
*);
91 gcall
*gimple_ic (gcall
*, struct cgraph_node
*, profile_probability
);
92 bool check_ic_target (gcall
*, struct cgraph_node
*);
93 bool get_nth_most_common_value (gimple
*stmt
, const char *counter_type
,
94 histogram_value hist
, gcov_type
*value
,
95 gcov_type
*count
, gcov_type
*all
,
98 /* In tree-profile.c. */
99 extern void gimple_init_gcov_profiler (void);
100 extern void gimple_gen_edge_profiler (int, edge
);
101 extern void gimple_gen_interval_profiler (histogram_value
, unsigned);
102 extern void gimple_gen_pow2_profiler (histogram_value
, unsigned);
103 extern void gimple_gen_topn_values_profiler (histogram_value
, unsigned);
104 extern void gimple_gen_ic_profiler (histogram_value
, unsigned);
105 extern void gimple_gen_ic_func_profiler (void);
106 extern void gimple_gen_time_profiler (unsigned);
107 extern void gimple_gen_average_profiler (histogram_value
, unsigned);
108 extern void gimple_gen_ior_profiler (histogram_value
, unsigned);
109 extern void stream_out_histogram_value (struct output_block
*, histogram_value
);
110 extern void stream_in_histogram_value (class lto_input_block
*, gimple
*);
111 extern struct cgraph_node
* find_func_by_profile_id (int func_id
);
115 extern void init_branch_prob (void);
116 extern void branch_prob (bool);
117 extern void read_thunk_profile (struct cgraph_node
*);
118 extern void end_branch_prob (void);
120 #endif /* GCC_VALUE_PROF_H */