generator 
	(: 
		import static compiler.ir.NodeKind.*; 
		import compiler.Code; 
		import compiler.Register; 
		import java.util.List; 
		import java.util.LinkedList; 
	:) 
declarations 
	(: 
		public void print(String s) { 
			// log errors to system err 
			System.err.println("DEBUG: " + s); 
		} 
	:)
operators 
	CONST(:E_CONST:),STOREA(:E_STOREA:),
	ADD(:E_ADD:), TEST
rules
	stmt
		=
		(: LinkedList instrList = new LinkedList(); :) 
			reg <: out String r, instrList :> 
			: 0 
		| STOREA st1(ADD a1 (reg <: out String v1, instrList  :> r1, 
						 reg <: out String v2, instrList :> r2 ), 
					reg <: out String v3, instrList :> r3)
			[ stmt ]
			: 4
		. 

	reg <:out String s, List<String> instrList:> (: String s = null; :) 
		= 
		CONST c1 
				(: 
					s = Register.getNextRegName(); 
					Code.emit("loadi " + s + "," + c1.name); 
					instrList.add(Code.getLastInstruction()); 
				:) 
			: 0 
		| 
		(: print("Evaluating ADD node."); :) 
		ADD a1 (
			  reg <: out String v1, instrList :> r1, 
			  reg <: out String v2, instrList :> r2
			) 
				(: 
					s = Register.getNextRegName(); 
					Code.emit("add " + s + "," + v1 + "," + v2); 
					instrList.add(Code.getLastInstruction()); 
					print("Left Register: " + r1.name): 
					print("Right Register: " + r2.name); 
				:) 
			: 1
		|
		(: sem0 :)
		TEST t1 (: sem1 :) 
			((: sem2:) 
				ADD a1 (: sem3 :) 
					(
						(: sem4 :) reg <: out String v1, instrList :> r1 (: sem5 :),
						(: sem6 :) reg <: out String v2, instrList :> r2 (: sem7 :)
					) ,
				(: sem8 :) reg <: out String v2, instrList :> r3 (: sem9 :)
			) (: sem10 :)
			[ reg <: out String v2, instrList :> r4 ] (: sem11 :)
			: 10
		. 
end