[RISCV][NFC] Refine the patch of D141061

Just saw Craig's comment after I commit, he has suggest a good NFC
for that change.

diff --git a/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp b/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
index bc6af29..115c962 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
+++ b/llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
@@ -1316,8 +1316,7 @@ void RISCVInsertVSETVLI::doLocalPostpass(MachineBasicBlock &MBB) {
             MI.getOperand(1).ChangeToImmediate(NextMI->getOperand(1).getImm());
           else
             MI.getOperand(1).ChangeToRegister(NextMI->getOperand(1).getReg(), false);
-          if (MI.getOpcode() != NextMI->getOpcode())
-            MI.setDesc(TII->get(NextMI->getOpcode()));
+          MI.setDesc(NextMI->getDesc());
         }
         MI.getOperand(2).setImm(NextMI->getOperand(2).getImm());
         ToDelete.push_back(NextMI);