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Don't try to unlink instructions twice during GVN

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BUG=chrome:175141

Review URL: https://codereview.chromium.org/12211128

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13648 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
svenpanne@chromium.org 2013-02-12 14:00:39 +00:00
parent 6333383ceb
commit e108d2a87c
1 changed files with 2 additions and 1 deletions
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3
src/hydrogen.cc
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@ -2720,7 +2720,8 @@ void HGlobalValueNumberer::AnalyzeGraph() {
map->Add(instr, zone());
}
}
if (instr->CheckFlag(HValue::kTrackSideEffectDominators)) {
if (instr->IsLinked() &&
instr->CheckFlag(HValue::kTrackSideEffectDominators)) {
for (int i = 0; i < kNumberOfTrackedSideEffects; i++) {
HValue* other = dominators->at(i);
GVNFlag changes_flag = HValue::ChangesFlagFromInt(i);