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

Ryujinx/_schema.json

@@ -17,6 +17,7 @@
     "enable_vsync",
     "enable_multicore_scheduling",
     "enable_fs_integrity_checks",
+    "enable_aggressive_cpu_opts",
     "controller_type",
     "keyboard_controls",
     "gamepad_controls"
@@ -399,6 +400,17 @@
         false
       ]
     },
+    "enable_aggressive_cpu_opts": {
+      "$id": "#/properties/enable_aggressive_cpu_opts",
+      "type": "boolean",
+      "title": "Enable Aggressive CPU Optimizations",
+      "description": "Enable or disable aggressive CPU optimizations",
+      "default": true,
+      "examples": [
+        true,
+        false
+      ]
+    },
     "controller_type": {
       "$id": "#/properties/controller_type",
       "type": "string",