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SCEVAddExpr::get() of an empty list is invalid.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22724 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-09 01:13:47 +00:00
parent bf9af65a93
commit b965ee5914
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -608,7 +608,10 @@ RemoveCommonExpressionsFromUseBases(std::vector<BasedUser> &Uses) {
for (unsigned j = 0, e = AE->getNumOperands(); j != e; ++j)
if (!SubExpressionUseCounts.count(AE->getOperand(j)))
NewOps.push_back(AE->getOperand(j));
Uses[i].Base = SCEVAddExpr::get(NewOps);
if (NewOps.size() == 0)
Uses[i].Base = Zero;
else
Uses[i].Base = SCEVAddExpr::get(NewOps);
} else {
// If the base is zero (which is common), return zero now, there are no
// CSEs we can find.