84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/* Gimple prediction routines.
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Copyright (C) 2007-2016 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_GIMPLE_PREDICT_H
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#define GCC_GIMPLE_PREDICT_H
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#include "predict.h"
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/* Return the predictor of GIMPLE_PREDICT statement GS. */
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static inline enum br_predictor
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gimple_predict_predictor (gimple *gs)
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{
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GIMPLE_CHECK (gs, GIMPLE_PREDICT);
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return (enum br_predictor) (gs->subcode & ~GF_PREDICT_TAKEN);
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}
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/* Set the predictor of GIMPLE_PREDICT statement GS to PREDICT. */
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static inline void
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gimple_predict_set_predictor (gimple *gs, enum br_predictor predictor)
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{
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GIMPLE_CHECK (gs, GIMPLE_PREDICT);
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gs->subcode = (gs->subcode & GF_PREDICT_TAKEN)
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| (unsigned) predictor;
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}
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/* Return the outcome of GIMPLE_PREDICT statement GS. */
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static inline enum prediction
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gimple_predict_outcome (gimple *gs)
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{
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GIMPLE_CHECK (gs, GIMPLE_PREDICT);
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return (gs->subcode & GF_PREDICT_TAKEN) ? TAKEN : NOT_TAKEN;
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}
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/* Set the outcome of GIMPLE_PREDICT statement GS to OUTCOME. */
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static inline void
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gimple_predict_set_outcome (gimple *gs, enum prediction outcome)
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{
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GIMPLE_CHECK (gs, GIMPLE_PREDICT);
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if (outcome == TAKEN)
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gs->subcode |= GF_PREDICT_TAKEN;
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else
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gs->subcode &= ~GF_PREDICT_TAKEN;
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}
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/* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from
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predict.def, OUTCOME is NOT_TAKEN or TAKEN. */
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inline gimple *
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gimple_build_predict (enum br_predictor predictor, enum prediction outcome)
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{
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gimple *p = gimple_alloc (GIMPLE_PREDICT, 0);
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/* Ensure all the predictors fit into the lower bits of the subcode. */
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gcc_assert ((int) END_PREDICTORS <= GF_PREDICT_TAKEN);
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gimple_predict_set_predictor (p, predictor);
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gimple_predict_set_outcome (p, outcome);
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return p;
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}
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#endif /* GCC_GIMPLE_PREDICT_H */
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