Commit fc31b58e authored by Sanjay Patel's avatar Sanjay Patel
Browse files

[InstCombine] simplify code for shuffle mask canonicalization; NFC 

We never use the local 'Mask' before returning, so that was dead code.
parent 847aabf1

llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp

+4 −6
Original line number Diff line number Diff line
@@ -1900,13 +1900,11 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) { 
        continue;

      }



      if (Mask[i] < (int)LHSWidth && isa<UndefValue>(LHS)) {

        Mask[i] = -1;     // Turn into undef.

      // Change select of undef to undef mask element or force to LHS.

      if (Mask[i] < (int)LHSWidth && isa<UndefValue>(LHS))

        Elts.push_back(UndefValue::get(Int32Ty));

      } else {

        Mask[i] = Mask[i] % LHSWidth;  // Force to LHS.

        Elts.push_back(ConstantInt::get(Int32Ty, Mask[i]));

      }

      else

        Elts.push_back(ConstantInt::get(Int32Ty, Mask[i] % LHSWidth));

    }

    SVI.setOperand(0, SVI.getOperand(1));

    SVI.setOperand(1, UndefValue::get(RHS->getType()));