1/* Definitions for transformations based on profile information for values.
2 Copyright (C) 2003-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#ifndef GCC_VALUE_PROF_H
21#define GCC_VALUE_PROF_H
22
23/* Supported histogram types. */
24enum hist_type
25{
26 HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified
27 interval. */
28 HIST_TYPE_POW2, /* Histogram of power of 2 values. */
29 HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost)
30 always constant. */
31 HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost)
32 called in indirect call */
33 HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */
34 HIST_TYPE_IOR, /* Used to compute expected alignment. */
35 HIST_TYPE_TIME_PROFILE, /* Used for time profile */
36 HIST_TYPE_INDIR_CALL_TOPN, /* Tries to identify the top N most frequently
37 called functions in indirect call. */
38 HIST_TYPE_MAX
39};
40
41#define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
42#define HIST_TYPE_FOR_COUNTER(COUNTER) \
43 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
44
45
46/* The value to measure. */
47struct histogram_value_t
48{
49 struct
50 {
51 tree value; /* The value to profile. */
52 gimple *stmt; /* Insn containing the value. */
53 gcov_type *counters; /* Pointer to first counter. */
54 struct histogram_value_t *next; /* Linked list pointer. */
55 } hvalue;
56 enum hist_type type; /* Type of information to measure. */
57 unsigned n_counters; /* Number of required counters. */
58 struct function *fun;
59 union
60 {
61 struct
62 {
63 int int_start; /* First value in interval. */
64 unsigned int steps; /* Number of values in it. */
65 } intvl; /* Interval histogram data. */
66 } hdata; /* Profiled information specific data. */
67};
68
69typedef struct histogram_value_t *histogram_value;
70typedef const struct histogram_value_t *const_histogram_value;
71
72
73typedef vec<histogram_value> histogram_values;
74
75extern void gimple_find_values_to_profile (histogram_values *);
76extern bool gimple_value_profile_transformations (void);
77
78histogram_value gimple_alloc_histogram_value (struct function *, enum hist_type,
79 gimple *stmt, tree);
80histogram_value gimple_histogram_value (struct function *, gimple *);
81histogram_value gimple_histogram_value_of_type (struct function *, gimple *,
82 enum hist_type);
83void gimple_add_histogram_value (struct function *, gimple *, histogram_value);
84void dump_histograms_for_stmt (struct function *, FILE *, gimple *);
85void gimple_remove_histogram_value (struct function *, gimple *, histogram_value);
86void gimple_remove_stmt_histograms (struct function *, gimple *);
87void gimple_duplicate_stmt_histograms (struct function *, gimple *,
88 struct function *, gimple *);
89void gimple_move_stmt_histograms (struct function *, gimple *, gimple *);
90void verify_histograms (void);
91void free_histograms (function *);
92void stringop_block_profile (gimple *, unsigned int *, HOST_WIDE_INT *);
93gcall *gimple_ic (gcall *, struct cgraph_node *, profile_probability);
94bool check_ic_target (gcall *, struct cgraph_node *);
95
96
97/* In tree-profile.c. */
98extern void gimple_init_gcov_profiler (void);
99extern void gimple_gen_edge_profiler (int, edge);
100extern void gimple_gen_interval_profiler (histogram_value, unsigned, unsigned);
101extern void gimple_gen_pow2_profiler (histogram_value, unsigned, unsigned);
102extern void gimple_gen_one_value_profiler (histogram_value, unsigned, unsigned);
103extern void gimple_gen_ic_profiler (histogram_value, unsigned, unsigned);
104extern void gimple_gen_ic_func_profiler (void);
105extern void gimple_gen_time_profiler (unsigned, unsigned);
106extern void gimple_gen_average_profiler (histogram_value, unsigned, unsigned);
107extern void gimple_gen_ior_profiler (histogram_value, unsigned, unsigned);
108extern void stream_out_histogram_value (struct output_block *, histogram_value);
109extern void stream_in_histogram_value (struct lto_input_block *, gimple *);
110extern struct cgraph_node* find_func_by_profile_id (int func_id);
111
112
113/* In profile.c. */
114extern void init_branch_prob (void);
115extern void branch_prob (void);
116extern void end_branch_prob (void);
117
118#endif /* GCC_VALUE_PROF_H */
119
120