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Fix a bug that was causing GVN to crash on 252.eon.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40494 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2007-07-25 21:13:41 +00:00
parent 26e5a309eb
commit 2e3d6b4a27
2 changed files with 38 additions and 2 deletions
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11
lib/Transforms/Scalar/GVN.cpp
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@@ -714,8 +714,15 @@ Value *GVN::performPHIConstruction(BasicBlock *BB, LoadInst* orig,
unsigned numPreds = std::distance(pred_begin(BB), pred_end(BB));
if (numPreds == 1) {
Phis[BB] = Phis[*pred_begin(BB)];
return Phis[BB];
DenseMap<BasicBlock*, Value*>::iterator DI = Phis.find(BB);
if (DI != Phis.end()) {
Phis.insert(std::make_pair(BB, DI->second));
return DI->second;
} else {
Value* domV = performPHIConstruction(*pred_begin(BB), orig, Phis);
Phis.insert(std::make_pair(BB, domV));
return domV;
}
} else {
PHINode *PN = new PHINode(orig->getType(), orig->getName()+".rle", BB->begin());
PN->reserveOperandSpace(numPreds);