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| author | Martin Liska <mliska@suse.cz> | 2018-08-10 11:43:06 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2018-08-10 09:43:06 +0000 |
| commit | 1e9168b27999c2f151e7169beabce4ee71d3eccc (patch) | |
| tree | a3137d2cf87f2981a38c27770ac4df9f144bb23b /gcc/predict.def | |
| parent | 7a096965f668c1d2129c70c92e2398227b97eee6 (diff) | |
| download | gcc-1e9168b27999c2f151e7169beabce4ee71d3eccc.zip gcc-1e9168b27999c2f151e7169beabce4ee71d3eccc.tar.gz gcc-1e9168b27999c2f151e7169beabce4ee71d3eccc.tar.bz2 | |
Introduce __builtin_expect_with_probability (PR target/83610).
2018-08-10 Martin Liska <mliska@suse.cz>
PR target/83610
* builtin-types.def (BT_FN_LONG_LONG_LONG_DOUBLE): Add new
function type.
* builtins.c (expand_builtin_expect_with_probability):
New function.
(expand_builtin_expect_with_probability): New function.
(build_builtin_expect_predicate): Add new argumnet probability
for BUILT_IN_EXPECT_WITH_PROBABILITY.
(fold_builtin_expect):
(fold_builtin_2):
(fold_builtin_3):
* builtins.def (BUILT_IN_EXPECT_WITH_PROBABILITY):
* builtins.h (fold_builtin_expect): Set new argument.
* doc/extend.texi: Document __builtin_expect_with_probability.
* doc/invoke.texi: Likewise.
* gimple-fold.c (gimple_fold_call): Pass new argument.
* ipa-fnsummary.c (find_foldable_builtin_expect): Handle
also BUILT_IN_EXPECT_WITH_PROBABILITY.
* predict.c (get_predictor_value): New function.
(expr_expected_value): Add new argument probability. Assume
that predictor and probability are always non-null.
(expr_expected_value_1): Likewise. For __builtin_expect and
__builtin_expect_with_probability set probability. Handle
combination in binary expressions.
(tree_predict_by_opcode): Simplify code by simply calling
get_predictor_value.
(pass_strip_predict_hints::execute): Add handling of
BUILT_IN_EXPECT_WITH_PROBABILITY.
* predict.def (PRED_BUILTIN_EXPECT_WITH_PROBABILITY): Add
new predictor.
* tree.h (DECL_BUILT_IN_P): New function.
2018-08-10 Martin Liska <mliska@suse.cz>
PR target/83610
* gcc.dg/predict-17.c: New test.
* gcc.dg/predict-18.c: New test.
* gcc.dg/predict-19.c: New test.
From-SVN: r263466
Diffstat (limited to 'gcc/predict.def')
| -rw-r--r-- | gcc/predict.def | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/predict.def b/gcc/predict.def index c0709aa..e2a56f9 100644 --- a/gcc/predict.def +++ b/gcc/predict.def @@ -73,6 +73,11 @@ DEF_PREDICTOR (PRED_COMPARE_AND_SWAP, "compare and swap", PROB_VERY_LIKELY, DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY, PRED_FLAG_FIRST_MATCH) +/* Hints provided by user via __builtin_expect_with_probability. */ +DEF_PREDICTOR (PRED_BUILTIN_EXPECT_WITH_PROBABILITY, + "__builtin_expect_with_probability", PROB_UNINITIALIZED, + PRED_FLAG_FIRST_MATCH) + /* Use number of loop iterations guessed by the contents of the loop. */ DEF_PREDICTOR (PRED_LOOP_ITERATIONS_GUESSED, "guessed loop iterations", PROB_UNINITIALIZED, PRED_FLAG_FIRST_MATCH) |