Misc. CPU optimizations (#575)

* Add optimizations related to caller/callee saved registers, thread synchronization and disable tier 0

* Refactoring

* Add a config entry to enable or disable the reg load/store opt.

* Remove unnecessary register state stores for calls when the callee is know

* Rename IoType to VarType

* Enable tier 0 while fixing some perf issues related to tier 0

* Small tweak -- Compile before adding to the cache, to avoid lags

* Add required config entry

ChocolArm64/Translation/ILOpCodeLog.cs

@@ -2,16 +2,16 @@ namespace ChocolArm64.Translation
 {
     struct ILOpCodeLog : IILEmit
     {
-        private string _text;
+        public string Text { get; }
 
         public ILOpCodeLog(string text)
         {
-            _text = text;
+            Text = text;
         }
 
         public void Emit(ILMethodBuilder context)
         {
-            context.Generator.EmitWriteLine(_text);
+            context.Generator.EmitWriteLine(Text);
         }
     }
 }