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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 | cbfe9df0966e333d78b2eb972171cd00856f45f0 (patch) | |
| tree | 6936703a6dfa887827a12a594a7a2ecf16dae293 /llvm/lib/Transforms | |
| parent | a57c3abf3709f7849154adf78d13cb849cd7e4c2 (diff) | |
| download | bcm5719-llvm-cbfe9df0966e333d78b2eb972171cd00856f45f0.tar.gz bcm5719-llvm-cbfe9df0966e333d78b2eb972171cd00856f45f0.zip | |
Avoid deferencing use_begin() if value does not have a use.
llvm-svn: 69836
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/IndVarSimplify.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp b/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp index 3e944d3857a..b1cde4177bf 100644 --- a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/llvm/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(); |
