projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 21 | /* Supported histogram types. */ | |
| 22 | enum hist_type | |
| 23 | { | |
| 24 | HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified | |
| 25 | interval. */ | |
| 26 | HIST_TYPE_POW2, /* Histogram of power of 2 values. */ | |
| 27 | HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost) | |
| 28 | always constant. */ | |
| 29 | HIST_TYPE_CONST_DELTA /* Tries to identify the (almost) always constant | |
| 30 | difference between two evaluations of a value. */ | |
| 31 | }; | |
| 32 | ||
| 6e885ee3 ZD |
33 | #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER) |
| 34 | #define HIST_TYPE_FOR_COUNTER(COUNTER) \ | |
| 35 | ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER)) | |
| 36 | ||
| 1c72f4ef ZD |
37 | /* The value to measure. */ |
| 38 | struct histogram_value | |
| 39 | { | |
| 40 | rtx value; /* The value to profile. */ | |
| 41 | enum machine_mode mode; /* And its mode. */ | |
| e0bb17a8 | 42 | rtx seq; /* Insns required to count the profiled value. */ |
| 1c72f4ef ZD |
43 | rtx insn; /* Insn before that to measure. */ |
| 44 | enum hist_type type; /* Type of information to measure. */ | |
| e0bb17a8 | 45 | unsigned n_counters; /* Number of required counters. */ |
| 1c72f4ef ZD |
46 | union |
| 47 | { | |
| 48 | struct | |
| 49 | { | |
| 50 | int int_start; /* First value in interval. */ | |
| 51 | int steps; /* Number of values in it. */ | |
| 52 | int may_be_less; /* May the value be below? */ | |
| 53 | int may_be_more; /* Or above. */ | |
| 54 | } intvl; /* Interval histogram data. */ | |
| 55 | struct | |
| 56 | { | |
| 57 | int may_be_other; /* If the value may be non-positive or not 2^k. */ | |
| 58 | } pow2; /* Power of 2 histogram data. */ | |
| 59 | } hdata; /* Profiled information specific data. */ | |
| 60 | }; | |
| 61 | ||
| 62 | extern void find_values_to_profile (unsigned *, struct histogram_value **); | |
| 63 | extern void free_profiled_values (unsigned, struct histogram_value *); | |
| fca9dc00 | 64 | extern bool value_profile_transformations (void); |