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| author | Alexander Monakov <amonakov@ispras.ru> | 2019-10-02 18:37:12 +0300 |
|---|---|---|
| committer | Alexander Monakov <amonakov@gcc.gnu.org> | 2019-10-02 18:37:12 +0300 |
| commit | 1764d63bd98c6c08e993f5c39dfa0247985b1642 (patch) | |
| tree | 8afecb03e7053f721f894c1ca4ab7fa0bc95928e /gcc/ifcvt.h | |
| parent | a264ea9a5bbbbf78ea8c53b675584d1f218e20db (diff) | |
| download | gcc-1764d63bd98c6c08e993f5c39dfa0247985b1642.zip gcc-1764d63bd98c6c08e993f5c39dfa0247985b1642.tar.gz gcc-1764d63bd98c6c08e993f5c39dfa0247985b1642.tar.bz2 | |
ifcvt: improve cost estimation (PR 87047)
PR rtl-optimization/87047
* ifcvt.c (average_cost): New static function. Use it...
(noce_process_if_block): ... here.
testsuite/
* gcc.dg/pr87047.c: New test.
From-SVN: r276466
Diffstat (limited to 'gcc/ifcvt.h')
| -rw-r--r-- | gcc/ifcvt.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/ifcvt.h b/gcc/ifcvt.h index 153ad96..40ad744 100644 --- a/gcc/ifcvt.h +++ b/gcc/ifcvt.h @@ -97,8 +97,8 @@ struct noce_if_info /* An estimate of the original costs. When optimizing for size, this is the combined cost of COND, JUMP and the costs for THEN_BB and ELSE_BB. - When optimizing for speed, we use the costs of COND plus the minimum of - the costs for THEN_BB and ELSE_BB, as computed in the next field. */ + When optimizing for speed, we use the costs of COND plus weighted average + of the costs for THEN_BB and ELSE_BB, as computed in the next field. */ unsigned int original_cost; /* Maximum permissible cost for the unconditional sequence we should |