1 /* Definitions for transformations based on profile information for values.
2 Copyright (C) 2003, 2004, 2005 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 2, 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 COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
21 #ifndef GCC_VALUE_PROF_H
22 #define GCC_VALUE_PROF_H
24 /* Supported histogram types. */
27 HIST_TYPE_INTERVAL
, /* Measures histogram of values inside a specified
29 HIST_TYPE_POW2
, /* Histogram of power of 2 values. */
30 HIST_TYPE_SINGLE_VALUE
, /* Tries to identify the value that is (almost)
32 HIST_TYPE_CONST_DELTA
/* Tries to identify the (almost) always constant
33 difference between two evaluations of a value. */
36 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
37 #define HIST_TYPE_FOR_COUNTER(COUNTER) \
38 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
40 /* The value to measure. */
41 struct histogram_value_t
45 tree value
; /* The value to profile. */
46 tree stmt
; /* Insn containing the value. */
47 gcov_type
*counters
; /* Pointer to first counter. */
48 struct histogram_value_t
*next
; /* Linked list pointer. */
50 enum hist_type type
; /* Type of information to measure. */
51 unsigned n_counters
; /* Number of required counters. */
56 int int_start
; /* First value in interval. */
57 unsigned int steps
; /* Number of values in it. */
58 } intvl
; /* Interval histogram data. */
59 } hdata
; /* Profiled information specific data. */
62 typedef struct histogram_value_t
*histogram_value
;
64 DEF_VEC_P(histogram_value
);
65 DEF_VEC_ALLOC_P(histogram_value
,heap
);
67 typedef VEC(histogram_value
,heap
) *histogram_values
;
69 /* Hooks registration. */
70 extern void tree_register_value_prof_hooks (void);
72 /* IR-independent entry points. */
73 extern void find_values_to_profile (histogram_values
*);
74 extern bool value_profile_transformations (void);
76 /* External declarations for edge-based profiling. */
77 struct profile_hooks
{
79 /* Insert code to initialize edge profiler. */
80 void (*init_edge_profiler
) (void);
82 /* Insert code to increment an edge count. */
83 void (*gen_edge_profiler
) (int, edge
);
85 /* Insert code to increment the interval histogram counter. */
86 void (*gen_interval_profiler
) (histogram_value
, unsigned, unsigned);
88 /* Insert code to increment the power of two histogram counter. */
89 void (*gen_pow2_profiler
) (histogram_value
, unsigned, unsigned);
91 /* Insert code to find the most common value. */
92 void (*gen_one_value_profiler
) (histogram_value
, unsigned, unsigned);
94 /* Insert code to find the most common value of a difference between two
95 evaluations of an expression. */
96 void (*gen_const_delta_profiler
) (histogram_value
, unsigned, unsigned);
99 histogram_value
gimple_histogram_value (struct function
*, tree
);
100 histogram_value
gimple_histogram_value_of_type (struct function
*, tree
, enum hist_type
);
101 void gimple_add_histogram_value (struct function
*, tree
, histogram_value
);
102 void gimple_remove_histogram_value (struct function
*, tree
, histogram_value
);
103 void dump_histograms_for_stmt (struct function
*, FILE *, tree
);
104 void gimple_remove_histogram_value (struct function
*, tree
, histogram_value
);
105 void gimple_remove_stmt_histograms (struct function
*, tree
);
106 void gimple_duplicate_stmt_histograms (struct function
*, tree
, struct function
*, tree
);
107 void verify_histograms (void);
108 void free_histograms (void);
111 extern void init_branch_prob (void);
112 extern void branch_prob (void);
113 extern void end_branch_prob (void);
114 extern void tree_register_profile_hooks (void);
116 /* In tree-profile.c. */
117 extern struct profile_hooks tree_profile_hooks
;
119 #endif /* GCC_VALUE_PROF_H */