diff options
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index d5de938ccfa..6ca1a0cddc2 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -318,6 +318,23 @@ optimize_loop_nest_for_size_p (struct loop *loop) return !optimize_loop_nest_for_speed_p (loop); } +/* Return true when edge E is likely to be well predictable by branch + predictor. */ + +bool +predictable_edge_p (edge e) +{ + if (profile_status == PROFILE_ABSENT) + return false; + if ((e->probability + <= PARAM_VALUE (PARAM_PREDICTABLE_BRANCH_OUTCOME) * REG_BR_PROB_BASE / 100) + || (REG_BR_PROB_BASE - e->probability + <= PARAM_VALUE (PARAM_PREDICTABLE_BRANCH_OUTCOME) * REG_BR_PROB_BASE / 100)) + return true; + return false; +} + + /* Set RTL expansion for BB profile. */ void |