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| author | Jan Hubicka <jh@suse.cz> | 2008-08-31 13:40:11 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2008-08-31 11:40:11 +0000 |
| commit | 277b4867eee3e48b4423e7341b9b5670f827d1c8 (patch) | |
| tree | 57ded3bb457ee70d3fede2ec7f8847787321ac33 /gcc/predict.c | |
| parent | 8518c095a8aaa6375e1e7046c824d7c2a9893855 (diff) | |
| download | gcc-277b4867eee3e48b4423e7341b9b5670f827d1c8.zip gcc-277b4867eee3e48b4423e7341b9b5670f827d1c8.tar.gz gcc-277b4867eee3e48b4423e7341b9b5670f827d1c8.tar.bz2 | |
cold-attribute-1.c: New testcase.
* gcc.target/i386/cold-attribute-1.c: New testcase.
* gcc.target/i386/cold-attribute-2.c: New testcase.
* gcc.target/i386/cold-attribute-3.c: New testcase.
* gcc.target/i386/cold-attribute-4.c: New testcase.
* predict.c (PROB_VERY_LIKELY): Make small enough so things
become cold.
* predict.def (PRED_NORETURN_CALL, PRED_COLD_CALL): Use it.
From-SVN: r139827
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 6ca1a0c..e02f9f8 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -66,8 +66,10 @@ along with GCC; see the file COPYING3. If not see static sreal real_zero, real_one, real_almost_one, real_br_prob_base, real_inv_br_prob_base, real_one_half, real_bb_freq_max; -/* Random guesstimation given names. */ -#define PROB_VERY_UNLIKELY (REG_BR_PROB_BASE / 100 - 1) +/* Random guesstimation given names. + PROV_VERY_UNLIKELY should be small enough so basic block predicted + by it gets bellow HOT_BB_FREQUENCY_FRANCTION. */ +#define PROB_VERY_UNLIKELY (REG_BR_PROB_BASE / 2000 - 1) #define PROB_EVEN (REG_BR_PROB_BASE / 2) #define PROB_VERY_LIKELY (REG_BR_PROB_BASE - PROB_VERY_UNLIKELY) #define PROB_ALWAYS (REG_BR_PROB_BASE) |