1 /* Gimple prediction routines.
3 Copyright (C) 2007-2018 Free Software Foundation, Inc.
5 This file is part of GCC.
7 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
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 #ifndef GCC_GIMPLE_PREDICT_H
22 #define GCC_GIMPLE_PREDICT_H
26 /* Return the predictor of GIMPLE_PREDICT statement GS. */
28 static inline enum br_predictor
29 gimple_predict_predictor (gimple
*gs
)
31 GIMPLE_CHECK (gs
, GIMPLE_PREDICT
);
32 return (enum br_predictor
) (gs
->subcode
& ~GF_PREDICT_TAKEN
);
36 /* Set the predictor of GIMPLE_PREDICT statement GS to PREDICT. */
39 gimple_predict_set_predictor (gimple
*gs
, enum br_predictor predictor
)
41 GIMPLE_CHECK (gs
, GIMPLE_PREDICT
);
42 gs
->subcode
= (gs
->subcode
& GF_PREDICT_TAKEN
)
43 | (unsigned) predictor
;
47 /* Return the outcome of GIMPLE_PREDICT statement GS. */
49 static inline enum prediction
50 gimple_predict_outcome (gimple
*gs
)
52 GIMPLE_CHECK (gs
, GIMPLE_PREDICT
);
53 return (gs
->subcode
& GF_PREDICT_TAKEN
) ? TAKEN
: NOT_TAKEN
;
57 /* Set the outcome of GIMPLE_PREDICT statement GS to OUTCOME. */
60 gimple_predict_set_outcome (gimple
*gs
, enum prediction outcome
)
62 GIMPLE_CHECK (gs
, GIMPLE_PREDICT
);
64 gs
->subcode
|= GF_PREDICT_TAKEN
;
66 gs
->subcode
&= ~GF_PREDICT_TAKEN
;
69 /* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from
70 predict.def, OUTCOME is NOT_TAKEN or TAKEN. */
73 gimple_build_predict (enum br_predictor predictor
, enum prediction outcome
)
75 gimple
*p
= gimple_alloc (GIMPLE_PREDICT
, 0);
76 /* Ensure all the predictors fit into the lower bits of the subcode. */
77 gcc_assert ((int) END_PREDICTORS
<= GF_PREDICT_TAKEN
);
78 gimple_predict_set_predictor (p
, predictor
);
79 gimple_predict_set_outcome (p
, outcome
);
83 /* Return true if GS is a GIMPLE_PREDICT statement. */
86 is_gimple_predict (const gimple
*gs
)
88 return gimple_code (gs
) == GIMPLE_PREDICT
;
91 #endif /* GCC_GIMPLE_PREDICT_H */