1/* Definitions for transformations based on profile information for values. 2 Copyright (C) 2003-2015 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along with GCC; see the file COPYING3. If not see 18<http://www.gnu.org/licenses/>. */ 19 20#ifndef GCC_VALUE_PROF_H 21#define GCC_VALUE_PROF_H 22 23/* Supported histogram types. */ 24enum hist_type 25{ 26 HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified 27 interval. */ 28 HIST_TYPE_POW2, /* Histogram of power of 2 values. */ 29 HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost) 30 always constant. */ 31 HIST_TYPE_CONST_DELTA, /* Tries to identify the (almost) always constant 32 difference between two evaluations of a value. */ 33 HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost) 34 called in indirect call */ 35 HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */ 36 HIST_TYPE_IOR, /* Used to compute expected alignment. */ 37 HIST_TYPE_TIME_PROFILE, /* Used for time profile */ 38 HIST_TYPE_INDIR_CALL_TOPN, /* Tries to identify the top N most frequently 39 called functions in indirect call. */ 40 HIST_TYPE_MAX 41}; 42 43#define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER) 44#define HIST_TYPE_FOR_COUNTER(COUNTER) \ 45 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER)) 46 47 48/* The value to measure. */ 49struct histogram_value_t 50{ 51 struct 52 { 53 tree value; /* The value to profile. */ 54 gimple stmt; /* Insn containing the value. */ 55 gcov_type *counters; /* Pointer to first counter. */ 56 struct histogram_value_t *next; /* Linked list pointer. */ 57 } hvalue; 58 enum hist_type type; /* Type of information to measure. */ 59 unsigned n_counters; /* Number of required counters. */ 60 struct function *fun; 61 union 62 { 63 struct 64 { 65 int int_start; /* First value in interval. */ 66 unsigned int steps; /* Number of values in it. */ 67 } intvl; /* Interval histogram data. */ 68 } hdata; /* Profiled information specific data. */ 69}; 70 71typedef struct histogram_value_t *histogram_value; 72typedef const struct histogram_value_t *const_histogram_value; 73 74 75typedef vec<histogram_value> histogram_values; 76 77extern void gimple_find_values_to_profile (histogram_values *); 78extern bool gimple_value_profile_transformations (void); 79 80histogram_value gimple_alloc_histogram_value (struct function *, enum hist_type, 81 gimple stmt, tree); 82histogram_value gimple_histogram_value (struct function *, gimple); 83histogram_value gimple_histogram_value_of_type (struct function *, gimple, 84 enum hist_type); 85void gimple_add_histogram_value (struct function *, gimple, histogram_value); 86void dump_histograms_for_stmt (struct function *, FILE *, gimple); 87void gimple_remove_histogram_value (struct function *, gimple, histogram_value); 88void gimple_remove_stmt_histograms (struct function *, gimple); 89void gimple_duplicate_stmt_histograms (struct function *, gimple, 90 struct function *, gimple); 91void gimple_move_stmt_histograms (struct function *, gimple, gimple); 92void verify_histograms (void); 93void free_histograms (void); 94void stringop_block_profile (gimple, unsigned int *, HOST_WIDE_INT *); 95gcall *gimple_ic (gcall *, struct cgraph_node *, int, gcov_type, 96 gcov_type); 97bool check_ic_target (gcall *, struct cgraph_node *); 98 99 100/* In tree-profile.c. */ 101extern void gimple_init_edge_profiler (void); 102extern void gimple_gen_edge_profiler (int, edge); 103extern void gimple_gen_interval_profiler (histogram_value, unsigned, unsigned); 104extern void gimple_gen_pow2_profiler (histogram_value, unsigned, unsigned); 105extern void gimple_gen_one_value_profiler (histogram_value, unsigned, unsigned); 106extern void gimple_gen_ic_profiler (histogram_value, unsigned, unsigned); 107extern void gimple_gen_ic_func_profiler (void); 108extern void gimple_gen_time_profiler (unsigned, unsigned, 109 gimple_stmt_iterator &); 110extern void gimple_gen_const_delta_profiler (histogram_value, 111 unsigned, unsigned); 112extern void gimple_gen_average_profiler (histogram_value, unsigned, unsigned); 113extern void gimple_gen_ior_profiler (histogram_value, unsigned, unsigned); 114extern void stream_out_histogram_value (struct output_block *, histogram_value); 115extern void stream_in_histogram_value (struct lto_input_block *, gimple); 116extern struct cgraph_node* find_func_by_profile_id (int func_id); 117 118 119/* In profile.c. */ 120extern void init_branch_prob (void); 121extern void branch_prob (void); 122extern void end_branch_prob (void); 123 124#endif /* GCC_VALUE_PROF_H */ 125 126