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| author | Dan Gohman <gohman@apple.com> | 2009-11-05 21:11:53 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-05 21:11:53 +0000 |
| commit | 03e896bd6073efc4523d8bcd0239d6ed62126db7 (patch) | |
| tree | 940b395910c450d7c9e00a014e1592e4982bdca8 /lib/Transforms/Scalar/IndVarSimplify.cpp | |
| parent | 7040d6e2f5d503e9948b9caff940a66238a0c605 (diff) | |
| download | external_llvm-03e896bd6073efc4523d8bcd0239d6ed62126db7.zip external_llvm-03e896bd6073efc4523d8bcd0239d6ed62126db7.tar.gz external_llvm-03e896bd6073efc4523d8bcd0239d6ed62126db7.tar.bz2 | |
Update various Loop optimization passes to cope with the possibility that
LoopSimplify form may not be available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86175 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/IndVarSimplify.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/IndVarSimplify.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp index b0bc70c..2912421 100644 --- a/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/lib/Transforms/Scalar/IndVarSimplify.cpp @@ -536,8 +536,10 @@ void IndVarSimplify::SinkUnusedInvariants(Loop *L) { BasicBlock *ExitBlock = L->getExitBlock(); if (!ExitBlock) return; - Instruction *InsertPt = ExitBlock->getFirstNonPHI(); BasicBlock *Preheader = L->getLoopPreheader(); + if (!Preheader) return; + + Instruction *InsertPt = ExitBlock->getFirstNonPHI(); BasicBlock::iterator I = Preheader->getTerminator(); while (I != Preheader->begin()) { --I; |