[llvm] [llvm-exegesis] [AArch64] Add support for Load Instructions in subprocess execution mode (PR #144895)

[Sjoerd Meijer via llvm-commits]

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@@ -115,7 +214,39 @@ class ExegesisAArch64Target : public ExegesisTarget {
   ExegesisAArch64Target()
       : ExegesisTarget(AArch64CpuPfmCounters, AArch64_MC::isOpcodeAvailable) {}
 
+  enum ArgumentRegisters {
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sjoerdmeijer wrote:

This is potentially a confusing name. These are not registers used for e.g. argument passing. 
These are registers we "reserve" for different purposes, like where we store the address of the allocated memory. 
Is that right?  If so, maybe a different name is better. Naming is difficult... I don't know what a good common name should be, but maybe something like "ReservedRegisters" 

https://github.com/llvm/llvm-project/pull/144895