Improve IRDumper (#1135)

* Improve IRDumper

* Make Symbols.Add(ulong, ulong, ulong, string) thread safe

* Use a StringBuilder for MemoryOperand

* Add #if M_DEBUG guards

* Fix JMP_TABLE typo

* Fix using in Symbols

* Use Conditional("M_DEBUG") instead

Address gdkchan's feedback

* Use a struct instead of 4-tuple

Address gdkchan's feedback

* Place symbols in comments instead

Address gdkchan's feedback

* Use StringBuilder throughout

* Handle offsetted symbols

* Fix naming convention of Builder

* Avoid ArgumentException

* Remove unnecessary using

* Use switch expression instead

* Turn into a class

* Clean up

* Remove unnecessary using

ARMeilleure/Translation/EmitterContext.cs

@@ -1,3 +1,4 @@
+using ARMeilleure.Diagnostics;
 using ARMeilleure.IntermediateRepresentation;
 using ARMeilleure.State;
 using System;
@@ -85,6 +86,8 @@ namespace ARMeilleure.Translation
 
             IntPtr ptr = Marshal.GetFunctionPointerForDelegate<Delegate>(func);
 
+            Symbols.Add((ulong)ptr.ToInt64(), func.Method.Name);
+
             OperandType returnType = GetOperandType(func.Method.ReturnType);
 
             return Call(Const(ptr.ToInt64()), returnType, callArgs);