File: value-prof.h

package info (click to toggle)
gccxml 0.9.0%2Bcvs20100501-2
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 79,132 kB
  • ctags: 73,371
  • sloc: ansic: 751,436; cpp: 34,175; asm: 26,833; sh: 5,077; makefile: 4,696; lex: 589; awk: 566; perl: 334; yacc: 271; pascal: 86; python: 29
file content (109 lines) | stat: -rw-r--r-- 3,963 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/* Definitions for transformations based on profile information for values.
   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.  */

#ifndef GCC_VALUE_PROF_H
#define GCC_VALUE_PROF_H

/* Supported histogram types.  */
enum hist_type
{
  HIST_TYPE_INTERVAL,        /* Measures histogram of values inside a specified
                           interval.  */
  HIST_TYPE_POW2,        /* Histogram of power of 2 values.  */
  HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost)
                           always constant.  */
  HIST_TYPE_CONST_DELTA        /* Tries to identify the (almost) always constant
                           difference between two evaluations of a value.  */
};

#define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
#define HIST_TYPE_FOR_COUNTER(COUNTER) \
  ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))

/* The value to measure.  */
struct histogram_value_t
{
  struct
    {
      tree value;                /* The value to profile.  */
      tree stmt;                /* Insn containing the value.  */
      gcov_type *counters;                        /* Pointer to first counter.  */
      struct histogram_value_t *next;                /* Linked list pointer.  */
    } hvalue;
  enum hist_type type;                        /* Type of information to measure.  */
  unsigned n_counters;                        /* Number of required counters.  */
  union
    {
      struct
        {
          int int_start;        /* First value in interval.  */
          unsigned int steps;        /* Number of values in it.  */
        } intvl;        /* Interval histogram data.  */
    } hdata;                /* Profiled information specific data.  */
};

typedef struct histogram_value_t *histogram_value;

DEF_VEC_P(histogram_value);
DEF_VEC_ALLOC_P(histogram_value,heap);

typedef VEC(histogram_value,heap) *histogram_values;

/* Hooks registration.  */
extern void tree_register_value_prof_hooks (void);

/* IR-independent entry points.  */
extern void find_values_to_profile (histogram_values *);
extern bool value_profile_transformations (void);

/* External declarations for edge-based profiling.  */
struct profile_hooks {

  /* Insert code to initialize edge profiler.  */
  void (*init_edge_profiler) (void);

  /* Insert code to increment an edge count.  */
  void (*gen_edge_profiler) (int, edge);

  /* Insert code to increment the interval histogram counter.  */
  void (*gen_interval_profiler) (histogram_value, unsigned, unsigned);

  /* Insert code to increment the power of two histogram counter.  */
  void (*gen_pow2_profiler) (histogram_value, unsigned, unsigned);

  /* Insert code to find the most common value.  */
  void (*gen_one_value_profiler) (histogram_value, unsigned, unsigned);

  /* Insert code to find the most common value of a difference between two
     evaluations of an expression.  */
  void (*gen_const_delta_profiler) (histogram_value, unsigned, unsigned);
};

/* In profile.c.  */
extern void init_branch_prob (void);
extern void branch_prob (void);
extern void end_branch_prob (void);
extern void tree_register_profile_hooks (void);

/* In tree-profile.c.  */
extern struct profile_hooks tree_profile_hooks;

#endif        /* GCC_VALUE_PROF_H */