address
package codeGenerator;

import ast.expression.FieldAccess;
import ast.expression.Indexing;
import ast.expression.Variable;
import visitor.AbstractVisitor;
import ast.definition.VarDefinition;
import ast.type.RecordType;

public class AddressVisitor extends AbstractVisitor {

	@Override
	public Object visit(Variable v, Object o) {
		//Global variable
		if(v.getVardef().getScope()==0) {
			cg.push("a", ((VarDefinition)v.getVardef()).getOffset());
		}

		//Local variable
		else {
			cg.pushabp();
			cg.push("i", ((VarDefinition)v.getVardef()).getOffset());
			cg.add("i");
		}
		return null;
	}

	@Override
	public Object visit(FieldAccess fa, Object o) {
		fa.getObject().accept(Visitors.addressVisitor, null);
		cg.push("i", ((RecordType)fa.getObject().getType()).getField(fa.getFieldName()).getOffset());
		cg.add("i");
		return null;
	}

	@Override
	public Object visit (Indexing indexing, Object p) {
		indexing.getArray().accept(Visitors.addressVisitor, null);
		indexing.getIndex().accept(Visitors.valueVisitor, null);
		//convert
		cg.push("i", indexing.getType().numberOfBytes());
		cg.mul("i");
		cg.add("i");

		return null;
	}

}
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execute

public ExecuteVisitor (String input, String output) {
		this.input = input;
		cg.createFile(output);
	}

	@Override
	public Object visit(WhileStmt wh, Object o) {
		int labels = cg.getLabels(2);
		cg.label(labels);
		wh.getCondition().accept(Visitors.valueVisitor, null);
		cg.jz(labels+1);

		//while
		for(Statement s : wh.getWhileBody())
			s.accept(Visitors.executeVisitor, null);

		cg.jmp(labels);
		cg.label(labels+1);
		return null;
	}

	@Override
	public Object visit (IfStatement ifstmt, Object p) {
		int labels = cg.getLabels(2);
		ifstmt.getCondition().accept(Visitors.valueVisitor, null);
		//convert
		cg.jz(labels);

		//if
		for(Statement stmt : ifstmt.getIfBody())
			stmt.accept(Visitors.executeVisitor, null);

		cg.jmp(labels+1);
		cg.label(labels);

		//else
		for(Statement stmt : ifstmt.getElseBody())
			stmt.accept(Visitors.executeVisitor, null);
		cg.label(labels+1);

		return null;
	}

----------------------------------------------------------------------------
@Override
	public Object visit (Indexing indexing, Object p) {
		indexing.accept(Visitors.addressVisitor, null);
		cg.load(indexing.getType().suffix());
		return null;
	}

	@Override
	public Object visit(Cast cast, Object o) {
		cast.getExpression().accept(Visitors.valueVisitor, null);
		cg.convertTo(cast.getExpression().getType().suffix(), cast.getType().suffix());
		return null;
	}

	//Built-in types
	@Override
	public Object visit(IntLiteral i, Object o) {
		cg.push("i", i.getValue());
		return null;
	}

	@Override
	public Object visit(RealLiteral r, Object o) {
		cg.push("f", r.getValue());
		return null;
	}

	@Override
	public Object visit(CharLiteral c, Object o) {
		cg.push("b", c.getValue());
		return null;
	}