[llvm] [AMDGPU] Add lit64 machine verifier (PR #196457)

[Jay Foad via llvm-commits]

================
@@ -5289,6 +5285,19 @@ bool SIInstrInfo::verifyInstruction(const MachineInstr &MI,
       }
       break;
     }
+    case AMDGPU::OPERAND_REG_IMM_FP64:
+    case AMDGPU::OPERAND_REG_IMM_INT64:
+    case AMDGPU::OPERAND_REG_IMM_V2INT32:
+    case AMDGPU::OPERAND_REG_IMM_V2FP32:
+      if (ST.has64BitLiterals() && Desc.getSize() != 4 && MO.isImm() &&
----------------
jayfoad wrote:

Is it worth checking this on non-has64BitLiterals targets too?
```suggestion
      if ((!ST.has64BitLiterals() || Desc.getSize() != 4) && MO.isImm() &&
```

https://github.com/llvm/llvm-project/pull/196457