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| author | Evan Cheng <evan.cheng@apple.com> | 2009-04-22 22:45:37 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-04-22 22:45:37 +0000 |
| commit | eecb86859c07b226a32805394fae3f1218459ff8 (patch) | |
| tree | 8cf2fb3ad9733301ea675367b367846a4f83d4ba /lib/Transforms/Scalar/IndVarSimplify.cpp | |
| parent | 080d215b811948919ced416c86f64bce7e14cc42 (diff) | |
| download | external_llvm-eecb86859c07b226a32805394fae3f1218459ff8.zip external_llvm-eecb86859c07b226a32805394fae3f1218459ff8.tar.gz external_llvm-eecb86859c07b226a32805394fae3f1218459ff8.tar.bz2 | |
Avoid deferencing use_begin() if value does not have a use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69836 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/IndVarSimplify.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/IndVarSimplify.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp index 3e944d3..b1cde41 100644 --- a/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/lib/Transforms/Scalar/IndVarSimplify.cpp @@ -806,6 +806,7 @@ bool IndVarSimplify::runOnLoop(Loop *L, LPPassManager &LPM) { // (RHS doesn't have to be constant. There should be a better approach // than bottom-up pattern matching for this...) if (UInst && UInst->getOpcode()==Instruction::And && + !UInst->use_empty() && allUsesAreSameTyped(Instruction::ZExt, UInst) && isa<ConstantInt>(UInst->getOperand(1))) { uint64_t newBitSize = LargestType->getPrimitiveSizeInBits(); |