1/* Gimple prediction routines. 2 3 Copyright (C) 2007-2022 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 3, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING3. If not see 19<http://www.gnu.org/licenses/>. */ 20 21#ifndef GCC_GIMPLE_PREDICT_H 22#define GCC_GIMPLE_PREDICT_H 23 24#include "predict.h" 25 26/* Return the predictor of GIMPLE_PREDICT statement GS. */ 27 28static inline enum br_predictor 29gimple_predict_predictor (const gimple *gs) 30{ 31 GIMPLE_CHECK (gs, GIMPLE_PREDICT); 32 return (enum br_predictor) (gs->subcode & ~GF_PREDICT_TAKEN); 33} 34 35 36/* Set the predictor of GIMPLE_PREDICT statement GS to PREDICT. */ 37 38static inline void 39gimple_predict_set_predictor (gimple *gs, enum br_predictor predictor) 40{ 41 GIMPLE_CHECK (gs, GIMPLE_PREDICT); 42 gs->subcode = (gs->subcode & GF_PREDICT_TAKEN) 43 | (unsigned) predictor; 44} 45 46 47/* Return the outcome of GIMPLE_PREDICT statement GS. */ 48 49static inline enum prediction 50gimple_predict_outcome (const gimple *gs) 51{ 52 GIMPLE_CHECK (gs, GIMPLE_PREDICT); 53 return (gs->subcode & GF_PREDICT_TAKEN) ? TAKEN : NOT_TAKEN; 54} 55 56 57/* Set the outcome of GIMPLE_PREDICT statement GS to OUTCOME. */ 58 59static inline void 60gimple_predict_set_outcome (gimple *gs, enum prediction outcome) 61{ 62 GIMPLE_CHECK (gs, GIMPLE_PREDICT); 63 if (outcome == TAKEN) 64 gs->subcode |= GF_PREDICT_TAKEN; 65 else 66 gs->subcode &= ~GF_PREDICT_TAKEN; 67} 68 69/* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from 70 predict.def, OUTCOME is NOT_TAKEN or TAKEN. */ 71 72inline gimple * 73gimple_build_predict (enum br_predictor predictor, enum prediction outcome) 74{ 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); 80 return p; 81} 82 83/* Return true if GS is a GIMPLE_PREDICT statement. */ 84 85static inline bool 86is_gimple_predict (const gimple *gs) 87{ 88 return gimple_code (gs) == GIMPLE_PREDICT; 89} 90 91#endif /* GCC_GIMPLE_PREDICT_H */ 92