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Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 978a3db738..14e2c70a8c 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -768,7 +768,9 @@ Instruction *InstCombiner::OptAndOp(Instruction *Op, ConstantIntegral *AndRHS, BinaryOperator &TheAnd) { Value *X = Op->getOperand(0); - Constant *Together = ConstantExpr::get(Instruction::And, AndRHS, OpRHS); + Constant *Together = 0; + if (!isa<ShiftInst>(Op)) + Together = ConstantExpr::get(Instruction::And, AndRHS, OpRHS); switch (Op->getOpcode()) { case Instruction::Xor: |