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package spiglet.spiglet2kanga;
import java.util.HashSet;
public class SpgStmt extends SpgSym{
public enum StmtType { NOOP, ERROR, CJUMP, JUMP, STORE, LOAD, MOVE, PRINT };
StmtType type;
public SpgTemp tmp1, tmp2;
public int imm;
public String jmptarget;
public SpgExpr exp;
public String lb;
public SpgStmt succ1, succ2;
public HashSet<SpgTemp> def, use;
public SpgStmt(StmtType t) {
type = t;
}
public String toString() {
String str="";
if (lb!=null) str = lb + " ";
switch (type) {
case CJUMP:
return str + "CJUMP " + tmp1.toString() + " " + jmptarget;
case ERROR:
return str + "ERROR";
case JUMP:
return str + "JUMP " + jmptarget;
case LOAD:
return str + "LD " + tmp1.toString() + " " + tmp2.toString() + " " + imm;
case MOVE:
return str + "MOVE " + tmp1.toString() + " " + exp.toString();
case NOOP:
return str + "NOOP";
case PRINT:
return str + "PRINT " + exp.toString();
case STORE:
return str + "STORE " + tmp1.toString() + " " + imm + " " + tmp2.toString();
default:
return null;
}
}
public void getDefUse() {
switch (type) {
case CJUMP:
def = null;
use = tmp1.getTmpUsed();
break;
case ERROR:
def = use = null;
break;
case JUMP:
def = use = null;
break;
case LOAD:
def = tmp1.getTmpUsed();
use = tmp2.getTmpUsed();
break;
case MOVE:
def = tmp1.getTmpUsed();
use = exp.getTmpUsed();
break;
case NOOP:
def = use = null;
break;
case PRINT:
def = null;
use = exp.getTmpUsed();
break;
case STORE:
def = null;
use = tmp1.getTmpUsed();
use.add(tmp2);
break;
default:
System.err.println("Unknown statement type");
def = use = null;
break;
}
}
}
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