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-rw-r--r--llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 6e4336ef875..b3366bb9888 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -2246,7 +2246,9 @@ static Instruction *ProcessUMulZExtIdiom(ICmpInst &I, Value *MulVal,
assert(I.getOperand(0) == MulVal || I.getOperand(1) == MulVal);
assert(I.getOperand(0) == OtherVal || I.getOperand(1) == OtherVal);
- Instruction *MulInstr = cast<Instruction>(MulVal);
+ auto *MulInstr = dyn_cast<Instruction>(MulVal);
+ if (!MulInstr)
+ return nullptr;
assert(MulInstr->getOpcode() == Instruction::Mul);
auto *LHS = cast<ZExtOperator>(MulInstr->getOperand(0)),
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