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recommit r108131 (hich has been backed out in r108135) with a fix

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108137 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif 2010-07-12 12:02:10 +00:00
parent 4fc719e607
commit 639e9e47a2
1 changed files with 3 additions and 2 deletions
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5
lib/Transforms/Scalar/TailDuplication.cpp
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@ -206,12 +206,13 @@ static BasicBlock *FindObviousSharedDomOf(BasicBlock *SrcBlock,
// there is only one other pred, get it, otherwise we can't handle it.
PI = pred_begin(DstBlock); PE = pred_end(DstBlock);
BasicBlock *DstOtherPred = 0;
if (*PI == SrcBlock) {
BasicBlock *P = *PI;
if (P == SrcBlock) {
if (++PI == PE) return 0;
DstOtherPred = *PI;
if (++PI != PE) return 0;
} else {
DstOtherPred = *PI;
DstOtherPred = P;
if (++PI == PE || *PI != SrcBlock || ++PI != PE) return 0;
}