1 /* Definitions for transformations based on profile information for values. 2 Copyright (C) 2003-2013 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 3, 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 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. */ 24 enum 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 }; 38 39 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER) 40 #define HIST_TYPE_FOR_COUNTER(COUNTER) \ 41 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER)) 42 43 44 /* The value to measure. */ 45 struct histogram_value_t 46 { 47 struct 48 { 49 tree value; /* The value to profile. */ 50 gimple stmt; /* Insn containing the value. */ 51 gcov_type *counters; /* Pointer to first counter. */ 52 struct histogram_value_t *next; /* Linked list pointer. */ 53 } hvalue; 54 enum hist_type type; /* Type of information to measure. */ 55 unsigned n_counters; /* Number of required counters. */ 56 union 57 { 58 struct 59 { 60 int int_start; /* First value in interval. */ 61 unsigned int steps; /* Number of values in it. */ 62 } intvl; /* Interval histogram data. */ 63 } hdata; /* Profiled information specific data. */ 64 }; 65 66 typedef struct histogram_value_t *histogram_value; 67 typedef const struct histogram_value_t *const_histogram_value; 68 69 70 typedef vec<histogram_value> histogram_values; 71 72 extern void gimple_find_values_to_profile (histogram_values *); 73 extern bool gimple_value_profile_transformations (void); 74 75 histogram_value gimple_histogram_value (struct function *, gimple); 76 histogram_value gimple_histogram_value_of_type (struct function *, gimple, 77 enum hist_type); 78 void gimple_add_histogram_value (struct function *, gimple, histogram_value); 79 void dump_histograms_for_stmt (struct function *, FILE *, gimple); 80 void gimple_remove_histogram_value (struct function *, gimple, histogram_value); 81 void gimple_remove_stmt_histograms (struct function *, gimple); 82 void gimple_duplicate_stmt_histograms (struct function *, gimple, 83 struct function *, gimple); 84 void gimple_move_stmt_histograms (struct function *, gimple, gimple); 85 void verify_histograms (void); 86 void free_histograms (void); 87 void stringop_block_profile (gimple, unsigned int *, HOST_WIDE_INT *); 88 89 /* In tree-profile.c. */ 90 extern void gimple_init_edge_profiler (void); 91 extern void gimple_gen_edge_profiler (int, edge); 92 extern void gimple_gen_interval_profiler (histogram_value, unsigned, unsigned); 93 extern void gimple_gen_pow2_profiler (histogram_value, unsigned, unsigned); 94 extern void gimple_gen_one_value_profiler (histogram_value, unsigned, unsigned); 95 extern void gimple_gen_ic_profiler (histogram_value, unsigned, unsigned); 96 extern void gimple_gen_ic_func_profiler (void); 97 extern void gimple_gen_const_delta_profiler (histogram_value, 98 unsigned, unsigned); 99 extern void gimple_gen_average_profiler (histogram_value, unsigned, unsigned); 100 extern void gimple_gen_ior_profiler (histogram_value, unsigned, unsigned); 101 102 /* In profile.c. */ 103 extern void init_branch_prob (void); 104 extern void branch_prob (void); 105 extern void end_branch_prob (void); 106 107 #endif /* GCC_VALUE_PROF_H */ 108 109