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

[Craig Topper 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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topperc wrote:

Yeah I wasn't super happy about this. StackPointer is probably always a physical register, but the interface it comes from uses Register. All the registers going into RegisterValue are all physical registers, so I wasn't sure about using Register there just to make these 2 compares compile.

In the long run maybe Register and MCRegister should be comparable by operator==.

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