1 /* Definitions for transformations based on profile information for values. 2 Copyright (C) 2003, 2004, 2005, 2007, 2008, 2010 3 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GCC_VALUE_PROF_H 22 #define GCC_VALUE_PROF_H 23 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 HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost) 35 called in indirect call */ 36 HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */ 37 HIST_TYPE_IOR /* Used to compute expected alignment. */ 38 }; 39 40 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER) 41 #define HIST_TYPE_FOR_COUNTER(COUNTER) \ 42 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER)) 43 44 45 /* The value to measure. */ 46 struct histogram_value_t 47 { 48 struct 49 { 50 tree value; /* The value to profile. */ 51 gimple stmt; /* Insn containing the value. */ 52 gcov_type *counters; /* Pointer to first counter. */ 53 struct histogram_value_t *next; /* Linked list pointer. */ 54 } hvalue; 55 enum hist_type type; /* Type of information to measure. */ 56 unsigned n_counters; /* Number of required counters. */ 57 union 58 { 59 struct 60 { 61 int int_start; /* First value in interval. */ 62 unsigned int steps; /* Number of values in it. */ 63 } intvl; /* Interval histogram data. */ 64 } hdata; /* Profiled information specific data. */ 65 }; 66 67 typedef struct histogram_value_t *histogram_value; 68 typedef const struct histogram_value_t *const_histogram_value; 69 70 DEF_VEC_P(histogram_value); 71 DEF_VEC_ALLOC_P(histogram_value,heap); 72 73 typedef VEC(histogram_value,heap) *histogram_values; 74 75 extern void gimple_find_values_to_profile (histogram_values *); 76 extern bool gimple_value_profile_transformations (void); 77 78 histogram_value gimple_histogram_value (struct function *, gimple); 79 histogram_value gimple_histogram_value_of_type (struct function *, gimple, 80 enum hist_type); 81 void gimple_add_histogram_value (struct function *, gimple, histogram_value); 82 void dump_histograms_for_stmt (struct function *, FILE *, gimple); 83 void gimple_remove_histogram_value (struct function *, gimple, histogram_value); 84 void gimple_remove_stmt_histograms (struct function *, gimple); 85 void gimple_duplicate_stmt_histograms (struct function *, gimple, 86 struct function *, gimple); 87 void gimple_move_stmt_histograms (struct function *, gimple, gimple); 88 void verify_histograms (void); 89 void free_histograms (void); 90 void stringop_block_profile (gimple, unsigned int *, HOST_WIDE_INT *); 91 92 /* In tree-profile.c. */ 93 extern void gimple_init_edge_profiler (void); 94 extern void gimple_gen_edge_profiler (int, edge); 95 extern void gimple_gen_interval_profiler (histogram_value, unsigned, unsigned); 96 extern void gimple_gen_pow2_profiler (histogram_value, unsigned, unsigned); 97 extern void gimple_gen_one_value_profiler (histogram_value, unsigned, unsigned); 98 extern void gimple_gen_ic_profiler (histogram_value, unsigned, unsigned); 99 extern void gimple_gen_ic_func_profiler (void); 100 extern void gimple_gen_const_delta_profiler (histogram_value, 101 unsigned, unsigned); 102 extern void gimple_gen_average_profiler (histogram_value, unsigned, unsigned); 103 extern void gimple_gen_ior_profiler (histogram_value, unsigned, unsigned); 104 105 /* In profile.c. */ 106 extern void init_branch_prob (void); 107 extern void branch_prob (void); 108 extern void end_branch_prob (void); 109 110 #endif /* GCC_VALUE_PROF_H */ 111 112