comparison gcc/predict.h @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
comparison
equal deleted inserted replaced
15:561a7518be6b 16:04ced10e8804
1 /* Definitions for branch prediction routines in the GNU compiler. 1 /* Definitions for branch prediction routines in the GNU compiler.
2 Copyright (C) 2001, 2003, 2004, 2007, 2008, 2010 2 Copyright (C) 2001-2017 Free Software Foundation, Inc.
3 Free Software Foundation, Inc.
4 3
5 This file is part of GCC. 4 This file is part of GCC.
6 5
7 GCC is free software; you can redistribute it and/or modify it under 6 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 7 the terms of the GNU General Public License as published by the Free
19 <http://www.gnu.org/licenses/>. */ 18 <http://www.gnu.org/licenses/>. */
20 19
21 #ifndef GCC_PREDICT_H 20 #ifndef GCC_PREDICT_H
22 #define GCC_PREDICT_H 21 #define GCC_PREDICT_H
23 22
23 #include "profile-count.h"
24
25 /* Random guesstimation given names.
26 PROB_VERY_UNLIKELY should be small enough so basic block predicted
27 by it gets below HOT_BB_FREQUENCY_FRACTION. */
28 #define PROB_VERY_UNLIKELY (REG_BR_PROB_BASE / 2000 - 1)
29 #define PROB_EVEN (REG_BR_PROB_BASE / 2)
30 #define PROB_VERY_LIKELY (REG_BR_PROB_BASE - PROB_VERY_UNLIKELY)
31 #define PROB_ALWAYS (REG_BR_PROB_BASE)
32 #define PROB_UNLIKELY (REG_BR_PROB_BASE / 5 - 1)
33 #define PROB_LIKELY (REG_BR_PROB_BASE - PROB_UNLIKELY)
34
24 #define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM, 35 #define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM,
25 enum br_predictor 36 enum br_predictor
26 { 37 {
27 #include "predict.def" 38 #include "predict.def"
28 39
34 { 45 {
35 NOT_TAKEN, 46 NOT_TAKEN,
36 TAKEN 47 TAKEN
37 }; 48 };
38 49
39 extern void predict_insn_def (rtx, enum br_predictor, enum prediction); 50 /* In emit-rtl.c. */
40 extern int counts_to_freqs (void); 51 extern profile_probability split_branch_probability;
41 extern void estimate_bb_frequencies (void); 52
53 extern gcov_type get_hot_bb_threshold (void);
54 extern void set_hot_bb_threshold (gcov_type);
55 extern bool maybe_hot_count_p (struct function *, profile_count);
56 extern bool maybe_hot_bb_p (struct function *, const_basic_block);
57 extern bool maybe_hot_edge_p (edge);
58 extern bool probably_never_executed_bb_p (struct function *, const_basic_block);
59 extern bool probably_never_executed_edge_p (struct function *, edge);
60 extern bool optimize_function_for_size_p (struct function *);
61 extern bool optimize_function_for_speed_p (struct function *);
62 extern optimization_type function_optimization_type (struct function *);
63 extern bool optimize_bb_for_size_p (const_basic_block);
64 extern bool optimize_bb_for_speed_p (const_basic_block);
65 extern optimization_type bb_optimization_type (const_basic_block);
66 extern bool optimize_edge_for_size_p (edge);
67 extern bool optimize_edge_for_speed_p (edge);
68 extern bool optimize_insn_for_size_p (void);
69 extern bool optimize_insn_for_speed_p (void);
70 extern bool optimize_loop_for_size_p (struct loop *);
71 extern bool optimize_loop_for_speed_p (struct loop *);
72 extern bool optimize_loop_nest_for_speed_p (struct loop *);
73 extern bool optimize_loop_nest_for_size_p (struct loop *);
74 extern bool predictable_edge_p (edge);
75 extern void rtl_profile_for_bb (basic_block);
76 extern void rtl_profile_for_edge (edge);
77 extern void default_rtl_profile (void);
78 extern bool rtl_predicted_by_p (const_basic_block, enum br_predictor);
79 extern bool gimple_predicted_by_p (const_basic_block, enum br_predictor);
80 extern bool edge_probability_reliable_p (const_edge);
81 extern bool br_prob_note_reliable_p (const_rtx);
82 extern void predict_insn_def (rtx_insn *, enum br_predictor, enum prediction);
83 extern void rtl_predict_edge (edge, enum br_predictor, int);
84 extern void gimple_predict_edge (edge, enum br_predictor, int);
85 extern void remove_predictions_associated_with_edge (edge);
86 extern void predict_edge_def (edge, enum br_predictor, enum prediction);
87 extern void invert_br_probabilities (rtx);
88 extern void guess_outgoing_edge_probabilities (basic_block);
89 extern void tree_guess_outgoing_edge_probabilities (basic_block);
90 extern void tree_estimate_probability (bool);
91 extern void handle_missing_profiles (void);
92 extern bool counts_to_freqs (void);
93 extern bool expensive_function_p (int);
94 extern void estimate_bb_frequencies (bool);
95 extern void compute_function_frequency (void);
96 extern tree build_predict_expr (enum br_predictor, enum prediction);
42 extern const char *predictor_name (enum br_predictor); 97 extern const char *predictor_name (enum br_predictor);
43 extern tree build_predict_expr (enum br_predictor, enum prediction);
44 extern void tree_estimate_probability (void);
45 extern void compute_function_frequency (void);
46 extern void rebuild_frequencies (void); 98 extern void rebuild_frequencies (void);
99 extern void report_predictor_hitrates (void);
100 extern void force_edge_cold (edge, bool);
101 extern void propagate_unlikely_bbs_forward (void);
102
103 extern void add_reg_br_prob_note (rtx_insn *, profile_probability);
104
105 /* In ipa-pure-const.c */
106 extern void warn_function_cold (tree);
47 107
48 #endif /* GCC_PREDICT_H */ 108 #endif /* GCC_PREDICT_H */