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| author | Andrew Trick <atrick@apple.com> | 2011-07-21 00:40:04 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2011-07-21 00:40:04 +0000 |
| commit | 37eb38d3f8531115f17f4e829013ccb513952bad (patch) | |
| tree | 573ffec2fcbe10ca4bc29bcd3a48d0e6d895db8b /lib/Transforms/Scalar | |
| parent | 36c62d3cbe04fc2bde371fa4bda4085baffc799f (diff) | |
| download | external_llvm-37eb38d3f8531115f17f4e829013ccb513952bad.zip external_llvm-37eb38d3f8531115f17f4e829013ccb513952bad.tar.gz external_llvm-37eb38d3f8531115f17f4e829013ccb513952bad.tar.bz2 | |
LSR crashes on an empty IVUsers list.
rdar://9786536
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135644 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index e90b5bc..4598df0 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -3740,6 +3740,9 @@ LSRInstance::LSRInstance(const TargetLowering *tli, Loop *l, Pass *P) OptimizeShadowIV(); OptimizeLoopTermCond(); + // If loop preparation eliminates all interesting IV users, bail. + if (IU.empty()) return; + // Start collecting data and preparing for the solver. CollectInterestingTypesAndFactors(); CollectFixupsAndInitialFormulae(); |