Directly checking for S_XOR_B32

Author: easyonaadit

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

@@ -5196,7 +5196,7 @@ static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI,
             .addReg(NewAccumulator->getOperand(0).getReg())
             .addImm(1)
             .setOperandDead(3); // Dead scc
-        if (is32BitOpc) {
+        if (Opc == AMDGPU::S_XOR_B32) {
           BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
               .addReg(SrcReg)
               .addReg(ParityRegister);