1 /* Definitions for transformations based on profile information for values. 2 Copyright (C) 2003-2021 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_TOPN_VALUES, /* Tries to identify the N most common values. */ 30 HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost) 31 called in indirect call */ 32 HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */ 33 HIST_TYPE_IOR, /* Used to compute expected alignment. */ 34 HIST_TYPE_TIME_PROFILE, /* Used for time profile */ 35 HIST_TYPE_MAX 36 }; 37 38 #define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER) 39 #define HIST_TYPE_FOR_COUNTER(COUNTER) \ 40 ((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER)) 41 42 43 /* The value to measure. */ 44 struct histogram_value_t 45 { 46 struct 47 { 48 tree value; /* The value to profile. */ 49 gimple *stmt; /* Insn containing the value. */ 50 gcov_type *counters; /* Pointer to first counter. */ 51 struct histogram_value_t *next; /* Linked list pointer. */ 52 } hvalue; 53 enum hist_type type; /* Type of information to measure. */ 54 unsigned n_counters; /* Number of required counters. */ 55 struct function *fun; 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_alloc_histogram_value (struct function *, enum hist_type, 76 gimple *stmt = NULL, 77 tree value = NULL_TREE); 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 (function *); 90 void stringop_block_profile (gimple *, unsigned int *, HOST_WIDE_INT *); 91 gcall *gimple_ic (gcall *, struct cgraph_node *, profile_probability); 92 bool get_nth_most_common_value (gimple *stmt, const char *counter_type, 93 histogram_value hist, gcov_type *value, 94 gcov_type *count, gcov_type *all, 95 unsigned n = 0); 96 97 /* In tree-profile.c. */ 98 extern void gimple_init_gcov_profiler (void); 99 extern void gimple_gen_edge_profiler (int, edge); 100 extern void gimple_gen_interval_profiler (histogram_value, unsigned); 101 extern void gimple_gen_pow2_profiler (histogram_value, unsigned); 102 extern void gimple_gen_topn_values_profiler (histogram_value, unsigned); 103 extern void gimple_gen_ic_profiler (histogram_value, unsigned); 104 extern void gimple_gen_ic_func_profiler (void); 105 extern void gimple_gen_time_profiler (unsigned); 106 extern void gimple_gen_average_profiler (histogram_value, unsigned); 107 extern void gimple_gen_ior_profiler (histogram_value, unsigned); 108 extern void stream_out_histogram_value (struct output_block *, histogram_value); 109 extern void stream_in_histogram_value (class lto_input_block *, gimple *); 110 extern struct cgraph_node* find_func_by_profile_id (int func_id); 111 112 113 /* In profile.c. */ 114 extern void init_branch_prob (void); 115 extern void branch_prob (bool); 116 extern void read_thunk_profile (struct cgraph_node *); 117 extern void end_branch_prob (void); 118 119 #endif /* GCC_VALUE_PROF_H */ 120 121