diff options
| author | Jan Hubicka <hubicka@ucw.cz> | 2016-06-05 18:43:19 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2016-06-05 16:43:19 +0000 |
| commit | 429d2750bfc033470f0c7864379d2e63a0b0424a (patch) | |
| tree | f0969b97cc1c4b6c49e7a43b1e102512bbef6698 /gcc/predict.def | |
| parent | 46f1f3c1c267215d8951674d0d62a5027b870163 (diff) | |
| download | gcc-429d2750bfc033470f0c7864379d2e63a0b0424a.zip gcc-429d2750bfc033470f0c7864379d2e63a0b0424a.tar.gz gcc-429d2750bfc033470f0c7864379d2e63a0b0424a.tar.bz2 | |
predict.c (predicted_by_loop_heuristics_p): New function.
* 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.
From-SVN: r237103
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 67de6f3..9c7db7a 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) |