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Update various Loop optimization passes to cope with the possibility that

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LoopSimplify form may not be available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86175 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-11-05 21:11:53 +00:00
parent 7040d6e2f5
commit 03e896bd60
7 changed files with 29 additions and 9 deletions
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4
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@@ -2528,6 +2528,10 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) {
SE = &getAnalysis<ScalarEvolution>();
Changed = false;
// If LoopSimplify form is not available, stay out of trouble.
if (!L->getLoopPreheader() || !L->getLoopLatch())
return false;
if (!IU->IVUsesByStride.empty()) {
DEBUG(errs() << "\nLSR on \"" << L->getHeader()->getParent()->getName()
<< "\" ";