exp.java

来自「用Java实现的编译器。把源代码编译成SPARC汇编程序」· Java 代码 · 共 32 行

/**
*This is an abstract class for literals. 
*There are two types of literals in decaf, intliteral and boolliteral
**/
package CatDecaf.IR;
import CatDecaf.Utilities.*;
import parser.*;
import java6035.tools.ASM.*;

public abstract class Exp implements Visitable{
	
	public int expLineNo;
	public Exp compileResult; 	//compile time interpretation of this expression
	public Exp constantResult;	//constant propagation for this expression
	public Exp algebraicResult; // algebraic simplification
	public Exp copyResult; //result for copy propagation
	//public IDDescriptor idd;
	public void setExpLineNo(int i){
		expLineNo = i;
	}
	public int getExpLineNo(){
		return expLineNo;
	}
	public abstract int getType();
	public abstract SPARCRegister getReg();
	public abstract void setReg(SPARCRegister r);
	public abstract void releaseReg();
	public abstract boolean noError();
		

}