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make reassociate more careful about not leaving around dead mul's

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92370 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-12-31 19:34:45 +00:00
parent f8a447de16
commit 1e7558b656
1 changed files with 7 additions and 1 deletions
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8
lib/Transforms/Scalar/Reassociate.cpp
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@ -530,7 +530,13 @@ Value *Reassociate::RemoveFactorFromExpression(Value *V, Value *Factor) {
return 0;
}
if (Factors.size() == 1) return Factors[0].Op;
// If this was just a single multiply, remove the multiply and return the only
// remaining operand.
if (Factors.size() == 1) {
ValueRankMap.erase(BO);
BO->eraseFromParent();
return Factors[0].Op;
}
RewriteExprTree(BO, Factors);
return BO;