1 /* Definitions for transformations based on profile information for values.
2 Copyright (C) 2003 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, 59 Temple Place - Suite 330, Boston, MA
21 /* Supported histogram types. */
24 HIST_TYPE_INTERVAL
, /* Measures histogram of values inside a specified
26 HIST_TYPE_POW2
, /* Histogram of power of 2 values. */
27 HIST_TYPE_SINGLE_VALUE
, /* Tries to identify the value that is (almost)
29 HIST_TYPE_CONST_DELTA
/* Tries to identify the (almost) always constant
30 difference between two evaluations of a value. */
33 /* The value to measure. */
34 struct histogram_value
36 rtx value
; /* The value to profile. */
37 enum machine_mode mode
; /* And its mode. */
38 rtx seq
; /* Insns required to count the profiled value. */
39 rtx insn
; /* Insn before that to measure. */
40 enum hist_type type
; /* Type of information to measure. */
41 unsigned n_counters
; /* Number of required counters. */
46 int int_start
; /* First value in interval. */
47 int steps
; /* Number of values in it. */
48 int may_be_less
; /* May the value be below? */
49 int may_be_more
; /* Or above. */
50 } intvl
; /* Interval histogram data. */
53 int may_be_other
; /* If the value may be non-positive or not 2^k. */
54 } pow2
; /* Power of 2 histogram data. */
55 } hdata
; /* Profiled information specific data. */
58 extern void find_values_to_profile (unsigned *, struct histogram_value
**);
59 extern void free_profiled_values (unsigned, struct histogram_value
*);