diff options
| author | hp <hp@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-09-13 00:49:27 +0000 |
|---|---|---|
| committer | hp <hp@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-09-13 00:49:27 +0000 |
| commit | 3fdc20c83c31dd06346ff9f01acf0c8b0dd9673b (patch) | |
| tree | 34098daa96824d3e738563cea60cf44c47b0adb0 /gcc/ifcvt.c | |
| parent | b20e5c5c8d67a64d6488c8cd12bc34eb461929d2 (diff) | |
| download | gcc-3fdc20c83c31dd06346ff9f01acf0c8b0dd9673b.tar.gz | |
PR rtl-optimization/41087
* ifcvt.c (noce_get_condition): Don't allow conditions with
side-effects.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164240 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index 9ac4b13caa7..9aff583ae45 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -2201,8 +2201,15 @@ noce_get_condition (rtx jump, rtx *earliest, bool then_else_reversed) /* Otherwise, fall back on canonicalize_condition to do the dirty work of manipulating MODE_CC values and COMPARE rtx codes. */ - return canonicalize_condition (jump, cond, reverse, earliest, - NULL_RTX, false, true); + tmp = canonicalize_condition (jump, cond, reverse, earliest, + NULL_RTX, false, true); + + /* We don't handle side-effects in the condition, like handling + REG_INC notes and making sure no duplicate conditions are emitted. */ + if (tmp != NULL_RTX && side_effects_p (tmp)) + return NULL_RTX; + + return tmp; } /* Return true if OP is ok for if-then-else processing. */ |