diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index b189503c2a..461b0a01fb 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -3636,9 +3636,8 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) { bool Changed = SimplifyCommutative(I); Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1); - if (isa<UndefValue>(Op1)) - return ReplaceInstUsesWith(I, // X | undef -> -1 - ConstantInt::getAllOnesValue(I.getType())); + if (isa<UndefValue>(Op1)) // X | undef -> -1 + return ReplaceInstUsesWith(I, ConstantInt::getAllOnesValue(I.getType())); // or X, X = X if (Op0 == Op1) @@ -3646,12 +3645,13 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) { // See if we can simplify any instructions used by the instruction whose sole // purpose is to compute bits we don't care about. - uint32_t BitWidth = cast<IntegerType>(I.getType())->getBitWidth(); - APInt KnownZero(BitWidth, 0), KnownOne(BitWidth, 0); - if (!isa<VectorType>(I.getType()) && - SimplifyDemandedBits(&I, APInt::getAllOnesValue(BitWidth), - KnownZero, KnownOne)) - return &I; + if (!isa<VectorType>(I.getType())) { + uint32_t BitWidth = cast<IntegerType>(I.getType())->getBitWidth(); + APInt KnownZero(BitWidth, 0), KnownOne(BitWidth, 0); + if (SimplifyDemandedBits(&I, APInt::getAllOnesValue(BitWidth), + KnownZero, KnownOne)) + return &I; + } // or X, -1 == -1 if (ConstantInt *RHS = dyn_cast<ConstantInt>(Op1)) { |