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1 /* Gimple prediction routines.
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2
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145
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3 Copyright (C) 2007-2020 Free Software Foundation, Inc.
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111
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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 static 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 static 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 static 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 static 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 (p, predictor);
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79 gimple_predict_set_outcome (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 static 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 (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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