1 /* Gimple prediction routines. 2 3 Copyright (C) 2007-2018 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 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 10 version. 11 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 15 for more details. 16 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/>. */ 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 28 static inline enum br_predictor 29 gimple_predict_predictor (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 38 static inline void 39 gimple_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 49 static inline enum prediction 50 gimple_predict_outcome (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 59 static inline void 60 gimple_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 72 inline gimple * 73 gimple_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 85 static inline bool 86 is_gimple_predict (const gimple *gs) 87 { 88 return gimple_code (gs) == GIMPLE_PREDICT; 89 } 90 91 #endif /* GCC_GIMPLE_PREDICT_H */ 92