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| author | Jan Hubicka <hubicka@ucw.cz> | 2017-01-01 16:40:29 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2017-01-01 15:40:29 +0000 |
| commit | 2c5123744bae39d080ca33d9463a517417ebafbe (patch) | |
| tree | 475c65d4ed2a25b62b2d50aab21862505952302c /gcc/predict.c | |
| parent | cbe34bb5edd97015e38c483516492f171bf9f95d (diff) | |
| download | gcc-2c5123744bae39d080ca33d9463a517417ebafbe.zip gcc-2c5123744bae39d080ca33d9463a517417ebafbe.tar.gz gcc-2c5123744bae39d080ca33d9463a517417ebafbe.tar.bz2 | |
re PR middle-end/77484 (Static branch predictor causes ~6-8% regression of SPEC2000 GAP)
PR middle-end/77484
* predict.def (PRED_CALL): Update hitrate.
(PRED_INDIR_CALL, PRED_POLYMORPHIC_CALL): New predictors.
* predict.c (tree_estimate_probability_bb): Split CALL predictor
into direct/indirect/polymorphic variants.
From-SVN: r243995
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 82177ab..e85573b 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -2786,7 +2786,12 @@ tree_estimate_probability_bb (basic_block bb) something exceptional. */ && gimple_has_side_effects (stmt)) { - predict_edge_def (e, PRED_CALL, NOT_TAKEN); + if (gimple_call_fndecl (stmt)) + predict_edge_def (e, PRED_CALL, NOT_TAKEN); + else if (virtual_method_call_p (gimple_call_fn (stmt))) + predict_edge_def (e, PRED_POLYMORPHIC_CALL, TAKEN); + else + predict_edge_def (e, PRED_INDIR_CALL, TAKEN); break; } } |