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1c72f4ef ZD |
1 | /* Definitions for transformations based on profile information for values. |
2 | Copyright (C) 2003 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
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 | |
9 | version. | |
10 | ||
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. | |
15 | ||
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, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
20 | ||
6de9cd9a DN |
21 | #ifndef GCC_VALUE_PROF_H |
22 | #define GCC_VALUE_PROF_H | |
23 | ||
1c72f4ef ZD |
24 | /* Supported histogram types. */ |
25 | enum hist_type | |
26 | { | |
27 | HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified | |
28 | interval. */ | |
29 | HIST_TYPE_POW2, /* Histogram of power of 2 values. */ | |
30 | HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost) | |
31 | always constant. */ | |
32 | HIST_TYPE_CONST_DELTA /* Tries to identify the (almost) always constant | |
33 | difference between two evaluations of a value. */ | |
34 | }; | |
35 | ||
6e885ee3 ZD |
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)) | |
39 | ||
1c72f4ef | 40 | /* The value to measure. */ |
6de9cd9a | 41 | /* The void *'s are either rtx or tree, depending on which IR is in use. */ |
1c72f4ef ZD |
42 | struct histogram_value |
43 | { | |
6de9cd9a | 44 | void * value; /* The value to profile. */ |
1c72f4ef | 45 | enum machine_mode mode; /* And its mode. */ |
6de9cd9a DN |
46 | void * seq; /* Insns required to count the profiled value. */ |
47 | void * insn; /* Insn before that to measure. */ | |
1c72f4ef | 48 | enum hist_type type; /* Type of information to measure. */ |
e0bb17a8 | 49 | unsigned n_counters; /* Number of required counters. */ |
1c72f4ef ZD |
50 | union |
51 | { | |
52 | struct | |
53 | { | |
54 | int int_start; /* First value in interval. */ | |
55 | int steps; /* Number of values in it. */ | |
56 | int may_be_less; /* May the value be below? */ | |
57 | int may_be_more; /* Or above. */ | |
58 | } intvl; /* Interval histogram data. */ | |
59 | struct | |
60 | { | |
61 | int may_be_other; /* If the value may be non-positive or not 2^k. */ | |
62 | } pow2; /* Power of 2 histogram data. */ | |
63 | } hdata; /* Profiled information specific data. */ | |
64 | }; | |
65 | ||
6de9cd9a DN |
66 | /* Hooks registration. */ |
67 | extern void rtl_register_value_prof_hooks (void); | |
68 | extern void tree_register_value_prof_hooks (void); | |
69 | ||
70 | /* IR-independent entry points. */ | |
1c72f4ef ZD |
71 | extern void find_values_to_profile (unsigned *, struct histogram_value **); |
72 | extern void free_profiled_values (unsigned, struct histogram_value *); | |
fca9dc00 | 73 | extern bool value_profile_transformations (void); |
6de9cd9a DN |
74 | \f |
75 | /* External declarations for edge-based profiling. */ | |
76 | struct profile_hooks { | |
77 | /* Insert code to increment an edge count. */ | |
78 | void (*gen_edge_profiler) (int, edge); | |
79 | ||
80 | /* Insert code to increment the interval histogram counter. */ | |
81 | void (*gen_interval_profiler) (struct histogram_value *, unsigned, unsigned); | |
82 | ||
83 | /* Insert code to increment the power of two histogram counter. */ | |
84 | void (*gen_pow2_profiler) (struct histogram_value *, unsigned, unsigned); | |
85 | ||
86 | /* Insert code to find the most common value. */ | |
87 | void (*gen_one_value_profiler) (struct histogram_value *, unsigned, unsigned); | |
88 | ||
89 | /* Insert code to find the most common value of a difference between two | |
90 | evaluations of an expression. */ | |
91 | void (*gen_const_delta_profiler) (struct histogram_value *, unsigned, | |
92 | unsigned); | |
93 | FILE * (*profile_dump_file) (void); | |
94 | }; | |
95 | ||
96 | /* In profile.c. */ | |
97 | extern void init_branch_prob (void); | |
98 | extern void branch_prob (void); | |
99 | extern void end_branch_prob (void); | |
100 | extern void tree_register_profile_hooks (void); | |
101 | extern void rtl_register_profile_hooks (void); | |
102 | ||
103 | /* In tree-profile.c. */ | |
104 | extern struct profile_hooks tree_profile_hooks; | |
105 | ||
106 | /* In rtl-profile.c. */ | |
107 | extern struct profile_hooks rtl_profile_hooks; | |
108 | ||
109 | #endif /* GCC_VALUE_PROF_H */ | |
110 |