Remove copyPhysReg change and remove IsRenamable checking

Author: BeMg

llvm/lib/CodeGen/MachineCopyPropagation.cpp

@@ -983,7 +983,7 @@ static bool isBackwardPropagatableCopy(const DestSourcePair &CopyOperands,
   if (MRI.isReserved(Def) || MRI.isReserved(Src))
     return false;
 
-  return CopyOperands.Source->isRenamable() && CopyOperands.Source->isKill();
+  return CopyOperands.Source->isKill();
 }
 
 void MachineCopyPropagation::propagateDefs(MachineInstr &MI) {

llvm/lib/Target/RISCV/RISCVInstrInfo.cpp

@@ -424,11 +424,9 @@ void RISCVInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
   const TargetRegisterInfo *TRI = STI.getRegisterInfo();
 
   if (RISCV::GPRRegClass.contains(DstReg, SrcReg)) {
-    auto MI = BuildMI(MBB, MBBI, DL, get(RISCV::ADDI), DstReg)
-                  .addReg(SrcReg, getKillRegState(KillSrc))
-                  .addImm(0);
-    MI->getOperand(0).setIsRenamable(MBBI->getOperand(0).isRenamable());
-    MI->getOperand(1).setIsRenamable(MBBI->getOperand(1).isRenamable());
+    BuildMI(MBB, MBBI, DL, get(RISCV::ADDI), DstReg)
+        .addReg(SrcReg, getKillRegState(KillSrc))
+        .addImm(0);
     return;
   }