2014-07-16 Yvan Roux <yvan.roux@linaro.org>
[official-gcc.git] / gcc-4_8-branch / gcc / value-prof.h
blobb6c77b6d65fb3d1741d08a9f0f194bf444de4369
1 /* Definitions for transformations based on profile information for values.
2 Copyright (C) 2003-2013 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
9 version.
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
14 for more details.
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. */
24 enum hist_type
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_CONST_DELTA, /* Tries to identify the (almost) always constant
32 difference between two evaluations of a value. */
33 HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost)
34 called in indirect call */
35 HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */
36 HIST_TYPE_IOR /* Used to compute expected alignment. */
39 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
40 #define HIST_TYPE_FOR_COUNTER(COUNTER) \
41 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
44 /* The value to measure. */
45 struct histogram_value_t
47 struct
49 tree value; /* The value to profile. */
50 gimple stmt; /* Insn containing the value. */
51 gcov_type *counters; /* Pointer to first counter. */
52 struct histogram_value_t *next; /* Linked list pointer. */
53 } hvalue;
54 enum hist_type type; /* Type of information to measure. */
55 unsigned n_counters; /* Number of required counters. */
56 union
58 struct
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_histogram_value (struct function *, gimple);
76 histogram_value gimple_histogram_value_of_type (struct function *, gimple,
77 enum hist_type);
78 void gimple_add_histogram_value (struct function *, gimple, histogram_value);
79 void dump_histograms_for_stmt (struct function *, FILE *, gimple);
80 void gimple_remove_histogram_value (struct function *, gimple, histogram_value);
81 void gimple_remove_stmt_histograms (struct function *, gimple);
82 void gimple_duplicate_stmt_histograms (struct function *, gimple,
83 struct function *, gimple);
84 void gimple_move_stmt_histograms (struct function *, gimple, gimple);
85 void verify_histograms (void);
86 void free_histograms (void);
87 void stringop_block_profile (gimple, unsigned int *, HOST_WIDE_INT *);
89 /* In tree-profile.c. */
90 extern void gimple_init_edge_profiler (void);
91 extern void gimple_gen_edge_profiler (int, edge);
92 extern void gimple_gen_interval_profiler (histogram_value, unsigned, unsigned);
93 extern void gimple_gen_pow2_profiler (histogram_value, unsigned, unsigned);
94 extern void gimple_gen_one_value_profiler (histogram_value, unsigned, unsigned);
95 extern void gimple_gen_ic_profiler (histogram_value, unsigned, unsigned);
96 extern void gimple_gen_ic_func_profiler (void);
97 extern void gimple_gen_const_delta_profiler (histogram_value,
98 unsigned, unsigned);
99 extern void gimple_gen_average_profiler (histogram_value, unsigned, unsigned);
100 extern void gimple_gen_ior_profiler (histogram_value, unsigned, unsigned);
102 /* In profile.c. */
103 extern void init_branch_prob (void);
104 extern void branch_prob (void);
105 extern void end_branch_prob (void);
107 #endif /* GCC_VALUE_PROF_H */