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| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-06-05 16:43:19 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-06-05 16:43:19 +0000 |
| commit | d07b2b6fa2d4cd04f333690897db09baa3c90beb (patch) | |
| tree | f0969b97cc1c4b6c49e7a43b1e102512bbef6698 /gcc/predict.def | |
| parent | 2bc8182ce5851debd8b2583fe7432964f5f606f7 (diff) | |
| download | gcc-d07b2b6fa2d4cd04f333690897db09baa3c90beb.tar.gz | |
* predict.c (predicted_by_loop_heuristics_p): New function.
(predict_iv_comparison): Use it.
(predict_loops): Walk from innermost loops; do not predict edges
leaving multiple loops multiple times; implement
PRED_LOOP_ITERATIONS_MAX heuristics.
* predict.def (PRED_LOOP_ITERATIONS_MAX): New predictor.
* gcc.dg/predict-9.c: Update template.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237103 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/predict.def')
| -rw-r--r-- | gcc/predict.def | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/predict.def b/gcc/predict.def index 67de6f3c6ed..9c7db7ab072 100644 --- a/gcc/predict.def +++ b/gcc/predict.def @@ -73,6 +73,10 @@ DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY, DEF_PREDICTOR (PRED_LOOP_ITERATIONS_GUESSED, "guessed loop iterations", PROB_ALWAYS, PRED_FLAG_FIRST_MATCH) +/* Use number of loop iterations guessed by the contents of the loop. */ +DEF_PREDICTOR (PRED_LOOP_ITERATIONS_MAX, "guessed loop iterations", + PROB_ALWAYS, PRED_FLAG_FIRST_MATCH) + /* Branch containing goto is probably not taken. */ DEF_PREDICTOR (PRED_CONTINUE, "continue", HITRATE (50), 0) |