[llvm] [AMDGPU][True16][CodeGen] fix moveToVALU with proper subreg access in true16 (PR #131859)

[Brox Chen via llvm-commits]

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@@ -257,7 +257,13 @@ static bool tryChangeVGPRtoSGPRinCopy(MachineInstr &MI,
       return false;
   }
   // Change VGPR to SGPR destination.
-  MRI.setRegClass(DstReg, TRI->getEquivalentSGPRClass(MRI.getRegClass(DstReg)));
+  const auto *RC = MRI.getRegClass(DstReg);
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broxigarchen wrote:

Run some tests and confirmed that this should be removed

https://github.com/llvm/llvm-project/pull/131859