GCC Middle and Back End API Reference
predict.h
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1 /* Definitions for branch prediction routines in the GNU compiler.
2  Copyright (C) 2001-2013 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_PREDICT_H
21 #define GCC_PREDICT_H
22 
23 #define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM,
24 enum br_predictor
25 {
26 #include "predict.def"
27 
28  /* Upper bound on non-language-specific builtins. */
29  END_PREDICTORS
30 };
31 #undef DEF_PREDICTOR
32 enum prediction
33 {
34  NOT_TAKEN,
35  TAKEN
36 };
37 
38 extern void predict_insn_def (rtx, enum br_predictor, enum prediction);
39 extern int counts_to_freqs (void);
40 extern void estimate_bb_frequencies (bool);
41 extern const char *predictor_name (enum br_predictor);
42 extern tree build_predict_expr (enum br_predictor, enum prediction);
43 extern void tree_estimate_probability (void);
44 extern void compute_function_frequency (void);
45 extern void rebuild_frequencies (void);
46 
47 #endif /* GCC_PREDICT_H */