Hi CogitDecompiler

[PalumboN]

This PR adds a decompiler from Cogit IR -> RTL.

I think that it is nice to debug the JIT compiler / analyze / learn about how is the JIT generates machine code for a complete method.
A big difference between this and the use of the machine code debugger is that:

• this is code. You can edit, add spaces, comments. It is easier to navigate.
• this is Cogit. If you develop the JIT compiler you don't need to learn details about the instructions of a particular architecture.

I added a smoke test compiling the method SequenceableCollection >> #do: and you get this:

gen_do: aBlock

	| label1 label2 label3 label4 label5 label6 label7 label8 label9 label10 label11 label12 label13 label14 |
	cogit MoveCq: 0 R: ReceiverResultReg.
	cogit PushR: LinkReg.
	cogit CallRT: 16r3200002D8.
	label1 := cogit Label.
	cogit AndCq: 7 R: ReceiverResultReg R: TempReg.
	cogit JumpNonZero: label2.
	cogit MoveMw: 0 r: ReceiverResultReg R: TempReg.
	cogit AndCq: 16r3FFFFF R: TempReg.
	label2 := cogit Label.
	cogit CmpR: ClassReg R: TempReg.
	cogit JumpNonZero: label30.
	label3 := cogit Label.
	cogit PushR: ReceiverResultReg.
	cogit PushR: Arg0Reg.
	cogit PushR: LinkReg.
	cogit PushR: FPReg.
	cogit MoveR: SPReg R: FPReg.
	cogit PushCw: 16r320000430.
	cogit MoveCq: 16r10000000000 R: SendNumArgsReg.
	cogit PushR: SendNumArgsReg.
	cogit PushR: ReceiverResultReg.
	cogit PushR: SendNumArgsReg.
	cogit PushR: SendNumArgsReg.
	cogit MoveAw: 16r7FFFFFFFFFFFFC88 R: TempReg.
	cogit CmpR: TempReg R: SPReg.
	cogit JumpBelow: label0.
	label4 := cogit Label.
	cogit MoveMw: -24 r: FPReg R: ReceiverResultReg.
	cogit MovePatcheableC32: -19 R: ClassReg.
	cogit CallRT: 16r3200002A8.
	label5 := cogit Label.
	cogit MoveR: ReceiverResultReg Mw: -32 r: FPReg.
	cogit MoveCq: 9 R: TempReg.
	cogit MoveR: TempReg Mw: -40 r: FPReg.
	cogit PushCq: 9.
	label6 := cogit Label.
	cogit MoveMw: -32 r: FPReg R: Arg0Reg.
	cogit MoveMw: -40 r: FPReg R: ReceiverResultReg.
	cogit MoveR: ReceiverResultReg R: TempReg.
	cogit AndR: Arg0Reg R: TempReg.
	cogit TstCq: 1 R: TempReg.
	cogit JumpZero: label7.
	cogit CmpR: Arg0Reg R: ReceiverResultReg.
	cogit JumpGreater: label14.
	cogit Jump: label9.
	label7 := cogit Label.
	cogit MovePatcheableC32: -5 R: ClassReg.
	cogit CallRT: 16r3200002B0.
	cogit MoveR: ReceiverResultReg R: TempReg.
	cogit SubCq: 16r10000000010 R: TempReg.
	cogit JumpZero: label14.
	cogit CmpCq: 16 R: TempReg.
	cogit JumpZero: label8.
	cogit CallRT: 16r3200002F8.
	label8 := cogit Label.
	label9 := cogit Label.
	cogit MoveMw: 16 r: FPReg R: TempReg.
	cogit PushR: TempReg.
	cogit MoveMw: -40 r: FPReg R: Arg0Reg.
	cogit MoveMw: -24 r: FPReg R: ReceiverResultReg.
	cogit MovePatcheableC32: -17 R: ClassReg.
	cogit CallRT: 16r3200002B0.
	cogit MoveR: ReceiverResultReg R: Arg0Reg.
	cogit MoveMw: -56 r: FPReg R: ReceiverResultReg.
	cogit AddCq: 8 R: SPReg.
	cogit MovePatcheableC32: -27 R: ClassReg.
	cogit CallRT: 16r3200002B0.
	cogit MoveMw: -40 r: FPReg R: ReceiverResultReg.
	cogit TstCq: 1 R: ReceiverResultReg.
	cogit JumpZero: label10.
	cogit AddCq: 8 R: ReceiverResultReg.
	cogit JumpNoOverflow: label11.
	cogit SubCq: 8 R: ReceiverResultReg.
	label10 := cogit Label.
	cogit MoveCq: 9 R: Arg0Reg.
	cogit MovePatcheableC32: -1 R: ClassReg.
	cogit CallRT: 16r3200002B0.
	label11 := cogit Label.
	label12 := cogit Label.
	cogit MoveR: ReceiverResultReg Mw: -40 r: FPReg.
	cogit MoveAw: 16r7FFFFFFFFFFFFC88 R: TempReg.
	cogit CmpR: TempReg R: SPReg.
	cogit JumpAboveOrEqual: label6.
	cogit CallRT: 16r320000308.
	label13 := cogit Label.
	cogit Jump: label6.
	cogit Nop.
	label14 := cogit Label.
	cogit AddCq: 8 R: SPReg.
	cogit MoveMw: -24 r: FPReg R: ReceiverResultReg.
	cogit MoveR: FPReg R: SPReg.
	cogit PopR: FPReg.
	cogit PopR: LinkReg.
	cogit RetN: 16.
	cogit Nop.
	cogit Nop