| 1 | /* Gimple prediction routines. |
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| 2 | |
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| 3 | Copyright (C) 2007-2023 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | This file is part of GCC. |
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| 6 | |
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| 7 | GCC is free software; you can redistribute it and/or modify it under |
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| 8 | the terms of the GNU General Public License as published by the Free |
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| 9 | Software Foundation; either version 3, or (at your option) any later |
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| 10 | version. |
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| 11 | |
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| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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| 15 | for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GCC; see the file COPYING3. If not see |
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| 19 | <http://www.gnu.org/licenses/>. */ |
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| 20 | |
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| 21 | #ifndef GCC_GIMPLE_PREDICT_H |
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| 22 | #define GCC_GIMPLE_PREDICT_H |
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| 23 | |
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| 24 | #include "predict.h" |
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| 25 | |
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| 26 | /* Return the predictor of GIMPLE_PREDICT statement GS. */ |
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| 27 | |
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| 28 | inline enum br_predictor |
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| 29 | gimple_predict_predictor (const gimple *gs) |
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| 30 | { |
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| 31 | GIMPLE_CHECK (gs, GIMPLE_PREDICT); |
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| 32 | return (enum br_predictor) (gs->subcode & ~GF_PREDICT_TAKEN); |
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| 33 | } |
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| 34 | |
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| 35 | |
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| 36 | /* Set the predictor of GIMPLE_PREDICT statement GS to PREDICT. */ |
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| 37 | |
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| 38 | inline void |
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| 39 | gimple_predict_set_predictor (gimple *gs, enum br_predictor predictor) |
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| 40 | { |
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| 41 | GIMPLE_CHECK (gs, GIMPLE_PREDICT); |
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| 42 | gs->subcode = (gs->subcode & GF_PREDICT_TAKEN) |
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| 43 | | (unsigned) predictor; |
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| 44 | } |
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| 45 | |
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| 46 | |
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| 47 | /* Return the outcome of GIMPLE_PREDICT statement GS. */ |
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| 48 | |
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| 49 | inline enum prediction |
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| 50 | gimple_predict_outcome (const gimple *gs) |
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| 51 | { |
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| 52 | GIMPLE_CHECK (gs, GIMPLE_PREDICT); |
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| 53 | return (gs->subcode & GF_PREDICT_TAKEN) ? TAKEN : NOT_TAKEN; |
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| 54 | } |
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| 55 | |
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| 56 | |
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| 57 | /* Set the outcome of GIMPLE_PREDICT statement GS to OUTCOME. */ |
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| 58 | |
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| 59 | inline void |
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| 60 | gimple_predict_set_outcome (gimple *gs, enum prediction outcome) |
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| 61 | { |
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| 62 | GIMPLE_CHECK (gs, GIMPLE_PREDICT); |
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| 63 | if (outcome == TAKEN) |
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| 64 | gs->subcode |= GF_PREDICT_TAKEN; |
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| 65 | else |
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| 66 | gs->subcode &= ~GF_PREDICT_TAKEN; |
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| 67 | } |
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| 68 | |
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| 69 | /* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from |
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| 70 | predict.def, OUTCOME is NOT_TAKEN or TAKEN. */ |
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| 71 | |
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| 72 | inline gimple * |
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| 73 | gimple_build_predict (enum br_predictor predictor, enum prediction outcome) |
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| 74 | { |
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| 75 | gimple *p = gimple_alloc (GIMPLE_PREDICT, 0); |
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| 76 | /* Ensure all the predictors fit into the lower bits of the subcode. */ |
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| 77 | gcc_assert ((int) END_PREDICTORS <= GF_PREDICT_TAKEN); |
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| 78 | gimple_predict_set_predictor (gs: p, predictor); |
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| 79 | gimple_predict_set_outcome (gs: p, outcome); |
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| 80 | return p; |
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| 81 | } |
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| 82 | |
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| 83 | /* Return true if GS is a GIMPLE_PREDICT statement. */ |
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| 84 | |
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| 85 | inline bool |
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| 86 | is_gimple_predict (const gimple *gs) |
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| 87 | { |
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| 88 | return gimple_code (g: gs) == GIMPLE_PREDICT; |
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| 89 | } |
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| 90 | |
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| 91 | #endif /* GCC_GIMPLE_PREDICT_H */ |
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| 92 | |
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