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DominatorTree.getNode can return null for unreachable blocks.

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llvm-svn: 104290
This commit is contained in:
Dan Gohman 2010-05-20 22:46:54 +00:00
parent b841e5c433
commit 3274120902
1 changed files with 1 additions and 1 deletions
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2
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -3127,7 +3127,7 @@ LSRInstance::HoistInsertPosition(BasicBlock::iterator IP,
BasicBlock *IDom;
for (DomTreeNode *Rung = DT.getNode(IP->getParent()); ; ) {
assert(Rung && "Block has no DomTreeNode!");
if (!Rung) return IP;
Rung = Rung->getIDom();
if (!Rung) return IP;
IDom = Rung->getBlock();