diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp index 9c52357a7d1..16136777731 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -364,13 +364,12 @@ static bool canEvaluateTruncated(Value *V, Type *Ty, InstCombiner &IC, // UDiv and URem can be truncated if all the truncated bits are zero. uint32_t OrigBitWidth = OrigTy->getScalarSizeInBits(); uint32_t BitWidth = Ty->getScalarSizeInBits(); - if (BitWidth < OrigBitWidth) { - APInt Mask = APInt::getBitsSetFrom(OrigBitWidth, BitWidth); - if (IC.MaskedValueIsZero(I->getOperand(0), Mask, 0, CxtI) && - IC.MaskedValueIsZero(I->getOperand(1), Mask, 0, CxtI)) { - return canEvaluateTruncated(I->getOperand(0), Ty, IC, CxtI) && - canEvaluateTruncated(I->getOperand(1), Ty, IC, CxtI); - } + assert(BitWidth < OrigBitWidth && "Unexpected bitwidths!"); + APInt Mask = APInt::getBitsSetFrom(OrigBitWidth, BitWidth); + if (IC.MaskedValueIsZero(I->getOperand(0), Mask, 0, CxtI) && + IC.MaskedValueIsZero(I->getOperand(1), Mask, 0, CxtI)) { + return canEvaluateTruncated(I->getOperand(0), Ty, IC, CxtI) && + canEvaluateTruncated(I->getOperand(1), Ty, IC, CxtI); } break; } |
