diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp index f35a6ce2d93..fbff5dd4a8c 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp @@ -319,7 +319,8 @@ static Instruction *foldShiftOfShiftedLogic(BinaryOperator &I, // TODO: Remove the one-use check if the other logic operand (Y) is constant. Value *X, *Y; auto matchFirstShift = [&](Value *V) { - return match(V, m_OneUse(m_Shift(m_Value(X), m_APInt(C0)))) && + return !isa<ConstantExpr>(V) && + match(V, m_OneUse(m_Shift(m_Value(X), m_APInt(C0)))) && cast<BinaryOperator>(V)->getOpcode() == ShiftOpcode && (*C0 + *C1).ult(Ty->getScalarSizeInBits()); }; |
