diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp index 908038b35e4..05e702fa43b 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -141,10 +141,9 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) { // a sub and fuse this add with it. if (LHS->hasOneUse() && (XorRHS->getValue()+1).isPowerOf2()) { IntegerType *IT = cast<IntegerType>(I.getType()); - APInt Mask = APInt::getAllOnesValue(IT->getBitWidth()); APInt LHSKnownOne(IT->getBitWidth(), 0); APInt LHSKnownZero(IT->getBitWidth(), 0); - ComputeMaskedBits(XorLHS, Mask, LHSKnownZero, LHSKnownOne); + ComputeMaskedBits(XorLHS, LHSKnownZero, LHSKnownOne); if ((XorRHS->getValue() | LHSKnownZero).isAllOnesValue()) return BinaryOperator::CreateSub(ConstantExpr::getAdd(XorRHS, CI), XorLHS); @@ -202,14 +201,13 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) { // A+B --> A|B iff A and B have no bits set in common. if (IntegerType *IT = dyn_cast<IntegerType>(I.getType())) { - APInt Mask = APInt::getAllOnesValue(IT->getBitWidth()); APInt LHSKnownOne(IT->getBitWidth(), 0); APInt LHSKnownZero(IT->getBitWidth(), 0); - ComputeMaskedBits(LHS, Mask, LHSKnownZero, LHSKnownOne); + ComputeMaskedBits(LHS, LHSKnownZero, LHSKnownOne); if (LHSKnownZero != 0) { APInt RHSKnownOne(IT->getBitWidth(), 0); APInt RHSKnownZero(IT->getBitWidth(), 0); - ComputeMaskedBits(RHS, Mask, RHSKnownZero, RHSKnownOne); + ComputeMaskedBits(RHS, RHSKnownZero, RHSKnownOne); // No bits in common -> bitwise or. if ((LHSKnownZero|RHSKnownZero).isAllOnesValue()) |
