This is an add-in for Fody

Add a postfixed method call instruction to recursive calls

Introduction to Fody

Nuget package

http://nuget.org/packages/Tail.Fody

Your code

public static int Fib(int i, int acc)
{
	if (i == 0)
	{
		return acc;
	}
	return Fib(i - 1, acc + i);
}

What gets compiled

.method public hidebysig static 
	int32 Fib (
		int32 i,
		int32 acc
	) cil managed 
{
	// Method begins at RVA 0x2050
	// Code size 19 (0x13)
	.maxstack 8

	IL_0000: ldarg.0
	IL_0001: brtrue.s IL_0005

	IL_0003: ldarg.1
	IL_0004: ret

	IL_0005: ldarg.0
	IL_0006: ldc.i4.1
	IL_0007: sub
	IL_0008: ldarg.1
	IL_0009: ldarg.0
	IL_000a: add
	IL_000b: tail. // Here it is
	IL_000d: call int32 Fib(int32, int32)
	IL_0012: ret
} // end of method Fib

What methods are targeted

• All methods in tail call position