[llvm] [llvm-exegesis] Begin replacing unsigned with MCRegister. NFC (PR #123109)

[Aiden Grossman via llvm-commits]

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@@ -81,7 +81,7 @@ static bool generateSnippetSetupCode(const ExegesisTarget &ET,
       // If we're generating memory instructions, don't load in the value for
       // the register with the stack pointer as it will be used later to finish
       // the setup.
-      if (RV.Register == StackPointerRegister)
+      if (Register(RV.Register) == StackPointerRegister)
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boomanaiden154 wrote:

I think the underlying type should probably be updated in `RegisterValue.h` rather than casting here?

https://github.com/llvm/llvm-project/pull/123109