diff options
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 6ca1a0cddc2..e02f9f890c2 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) |