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LoopUnroll: always check for NULL LoopPassManager 

llvm-svn: 158007
This commit is contained in:
Andrew Trick 2012-06-05 17:51:05 +00:00
parent 480bd86182
commit a6fb910fad
1 changed files with 5 additions and 3 deletions
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2
llvm/lib/Transforms/Utils/LoopUnroll.cpp
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@ -95,10 +95,12 @@ static BasicBlock *FoldBlockIntoPredecessor(BasicBlock *BB, LoopInfo* LI,
// Erase basic block from the function... // Erase basic block from the function...
// ScalarEvolution holds references to loop exit blocks. // ScalarEvolution holds references to loop exit blocks.
if (LPM) {
if (ScalarEvolution *SE = LPM->getAnalysisIfAvailable<ScalarEvolution>()) { if (ScalarEvolution *SE = LPM->getAnalysisIfAvailable<ScalarEvolution>()) {
if (Loop *L = LI->getLoopFor(BB)) if (Loop *L = LI->getLoopFor(BB))
SE->forgetLoop(L); SE->forgetLoop(L);
} }
}
LI->removeBlock(BB); LI->removeBlock(BB);
BB->eraseFromParent(); BB->eraseFromParent();