d5fa9cc994
* predict.h (PROB_LIKELY): Fix the value. * internal-fn.c (ubsan_expand_si_overflow_mul_check): Add support for overflow checking for modes without 2xwider supported mode, if the mode has 2xnarrower mode. * c-c++-common/ubsan/overflow-mul-3.c: New test. * c-c++-common/ubsan/overflow-mul-4.c: New test. From-SVN: r206026
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/* Definitions for branch prediction routines in the GNU compiler.
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Copyright (C) 2001-2013 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_PREDICT_H
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#define GCC_PREDICT_H
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/* Random guesstimation given names.
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PROB_VERY_UNLIKELY should be small enough so basic block predicted
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by it gets below HOT_BB_FREQUENCY_FRACTION. */
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#define PROB_VERY_UNLIKELY (REG_BR_PROB_BASE / 2000 - 1)
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#define PROB_EVEN (REG_BR_PROB_BASE / 2)
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#define PROB_VERY_LIKELY (REG_BR_PROB_BASE - PROB_VERY_UNLIKELY)
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#define PROB_ALWAYS (REG_BR_PROB_BASE)
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#define PROB_UNLIKELY (REG_BR_PROB_BASE / 5 - 1)
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#define PROB_LIKELY (REG_BR_PROB_BASE - PROB_UNLIKELY)
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#define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM,
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enum br_predictor
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{
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#include "predict.def"
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/* Upper bound on non-language-specific builtins. */
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END_PREDICTORS
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};
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#undef DEF_PREDICTOR
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enum prediction
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{
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NOT_TAKEN,
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TAKEN
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};
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extern void predict_insn_def (rtx, enum br_predictor, enum prediction);
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extern int counts_to_freqs (void);
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extern void handle_missing_profiles (void);
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extern void estimate_bb_frequencies (bool);
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extern const char *predictor_name (enum br_predictor);
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extern tree build_predict_expr (enum br_predictor, enum prediction);
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extern void tree_estimate_probability (void);
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extern void compute_function_frequency (void);
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extern void rebuild_frequencies (void);
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#endif /* GCC_PREDICT_H */
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