diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 94f4cf2c17..82b3f8cca6 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -5658,9 +5658,9 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1, BinaryOperator::create(Op0BO->getOpcode(), YS, V1, Op0BO->getOperand(1)->getName()); InsertNewInstBefore(X, I); // (X + (Y << C)) - Constant *C2 = ConstantInt::getAllOnesValue(X->getType()); - C2 = ConstantExpr::getShl(C2, Op1); - return BinaryOperator::createAnd(X, C2); + uint32_t Op1Val = Op1->getZExtValue(); + return BinaryOperator::createAnd(X, ConstantInt::get( + APInt::getHighBitsSet(TypeBits, TypeBits-Op1Val))); } // Turn (Y + ((X >> C) & CC)) << C -> ((X & (CC << C)) + (Y << C)) @@ -5697,9 +5697,9 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1, BinaryOperator::create(Op0BO->getOpcode(), V1, YS, Op0BO->getOperand(0)->getName()); InsertNewInstBefore(X, I); // (X + (Y << C)) - Constant *C2 = ConstantInt::getAllOnesValue(X->getType()); - C2 = ConstantExpr::getShl(C2, Op1); - return BinaryOperator::createAnd(X, C2); + uint32_t Op1Val = Op1->getZExtValue(); + return BinaryOperator::createAnd(X, ConstantInt::get( + APInt::getHighBitsSet(TypeBits, TypeBits-Op1Val))); } // Turn (((X >> C)&CC) + Y) << C -> (X + (Y << C)) & (CC << C) |