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Check for the short-circuiting condition before performing

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the potentially expensive erase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73359 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-06-14 22:53:57 +00:00
parent 4dfad29547
commit 7f7c4366ca
1 changed files with 1 additions and 1 deletions
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2
lib/Analysis/ScalarEvolution.cpp
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@@ -1012,8 +1012,8 @@ SCEVHandle ScalarEvolution::getAddExpr(SmallVectorImpl<SCEVHandle> &Ops) {
// We found two constants, fold them together!
Ops[0] = getConstant(LHSC->getValue()->getValue() +
RHSC->getValue()->getValue());
if (Ops.size() == 2) return Ops[0];
Ops.erase(Ops.begin()+1); // Erase the folded element
if (Ops.size() == 1) return Ops[0];
LHSC = cast<SCEVConstant>(Ops[0]);
}