[mips][msa] copyPhysReg() should not set RegState::Define on result of CTCMSA.

[dsanders]

Summary

The machine verifier reports 'Explicit operand marked as def' when it is
manually specified even though it agrees with the operand info.

[sdardis]

LGTM.

lib/Target/Mips/MipsSEInstrInfo.cpp

else if (Mips::HI32DSPRegClass.contains(DestReg))
       Opc = Mips::MTHI_DSP;
     else if (Mips::LO32DSPRegClass.contains(DestReg))
       Opc = Mips::MTLO_DSP;
     else if (Mips::DSPCCRegClass.contains(DestReg)) {
       BuildMI(MBB, I, DL, get(Mips::WRDSP))
         .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
         .addReg(DestReg, RegState::ImplicitDefine);
       return;
+    } else if (Mips::MSACtrlRegClass.contains(DestReg)) {
+      BuildMI(MBB, I, DL, get(Mips::CTCMSA))
+          .addReg(DestReg)
+          .addReg(SrcReg, getKillRegState(KillSrc));
+      return;
     }
-    else if (Mips::MSACtrlRegClass.contains(DestReg))
-      Opc = Mips::CTCMSA;
   }
   else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
     Opc = Mips::FMOV_S;
   else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg))
     Opc = Mips::FMOV_D32;
   else if (Mips::FGR64RegClass.contains(DestReg, SrcReg))
     Opc = Mips::FMOV_D64;
   else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.

test/CodeGen/Mips/msa/elm_cxcmsa.ll

 ; Test the MSA ctcmsa and cfcmsa intrinsics (which are encoded with the ELM
 ; instruction format).
 
-; RUN: llc -march=mips -mattr=+msa,+fp64 < %s | FileCheck %s
-; RUN: llc -march=mipsel -mattr=+msa,+fp64 < %s | FileCheck %s
+; RUN: llc -march=mips -mattr=+msa,+fp64 -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -march=mipsel -mattr=+msa,+fp64 -verify-machineinstrs < %s | FileCheck %s
 
 define i32 @msa_ir_cfcmsa_test() nounwind {
 entry:
   %0 = tail call i32 @llvm.mips.cfcmsa(i32 0)
   ret i32 %0
 }
 
 ; CHECK: msa_ir_cfcmsa_test: