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/* Gimple prediction routines.
Copyright (C) 2007-2017 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_GIMPLE_PREDICT_H
#define GCC_GIMPLE_PREDICT_H
#include "predict.h"
/* Return the predictor of GIMPLE_PREDICT statement GS. */
static inline enum br_predictor
gimple_predict_predictor (gimple *gs)
{
GIMPLE_CHECK (gs, GIMPLE_PREDICT);
return (enum br_predictor) (gs->subcode & ~GF_PREDICT_TAKEN);
}
/* Set the predictor of GIMPLE_PREDICT statement GS to PREDICT. */
static inline void
gimple_predict_set_predictor (gimple *gs, enum br_predictor predictor)
{
GIMPLE_CHECK (gs, GIMPLE_PREDICT);
gs->subcode = (gs->subcode & GF_PREDICT_TAKEN)
| (unsigned) predictor;
}
/* Return the outcome of GIMPLE_PREDICT statement GS. */
static inline enum prediction
gimple_predict_outcome (gimple *gs)
{
GIMPLE_CHECK (gs, GIMPLE_PREDICT);
return (gs->subcode & GF_PREDICT_TAKEN) ? TAKEN : NOT_TAKEN;
}
/* Set the outcome of GIMPLE_PREDICT statement GS to OUTCOME. */
static inline void
gimple_predict_set_outcome (gimple *gs, enum prediction outcome)
{
GIMPLE_CHECK (gs, GIMPLE_PREDICT);
if (outcome == TAKEN)
gs->subcode |= GF_PREDICT_TAKEN;
else
gs->subcode &= ~GF_PREDICT_TAKEN;
}
/* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from
predict.def, OUTCOME is NOT_TAKEN or TAKEN. */
inline gimple *
gimple_build_predict (enum br_predictor predictor, enum prediction outcome)
{
gimple *p = gimple_alloc (GIMPLE_PREDICT, 0);
/* Ensure all the predictors fit into the lower bits of the subcode. */
gcc_assert ((int) END_PREDICTORS <= GF_PREDICT_TAKEN);
gimple_predict_set_predictor (p, predictor);
gimple_predict_set_outcome (p, outcome);
return p;
}
#endif /* GCC_GIMPLE_PREDICT_H */