diff options
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 505313ba9c..696575e3d6 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -361,10 +361,11 @@ Instruction *InstCombiner::visitMul(BinaryOperator &I) { if (Constant *Op1 = dyn_cast<Constant>(I.getOperand(1))) { if (ConstantInt *CI = dyn_cast<ConstantInt>(Op1)) { const Type *Ty = CI->getType(); - uint64_t Val = Ty->isSigned() ? - (uint64_t)cast<ConstantSInt>(CI)->getValue() : - cast<ConstantUInt>(CI)->getValue(); + int64_t Val = Ty->isSigned() ? cast<ConstantSInt>(CI)->getValue() : + (int64_t)cast<ConstantUInt>(CI)->getValue(); switch (Val) { + case -1: // X * -1 -> -X + return BinaryOperator::createNeg(Op0, I.getName()); case 0: return ReplaceInstUsesWith(I, Op1); // Eliminate 'mul double %X, 0' case 1: |