public int visit(IrMove s)
{
int rVal = s.src.accept(this);
int lVal;
if (s.dst is IrTemp) {
lVal = getLValue((IrTemp) s.dst);
temps[lVal] = rVal;
} else if (s.dst is IrMem) {
lVal = GetMemAddress((IrMem) s.dst);
heap[lVal] = rVal;
} else if (s.dst is IrField) {
lVal = GetFieldAddress((IrField) s.dst);
heap[lVal] = rVal;
} else if (s.dst is IrParam) {
lVal = GetParamAddress((IrParam) s.dst);
stack[lVal] = rVal;
} else if (s.dst is IrVar) {
lVal = GetVarAddress((IrVar) s.dst);
stack[lVal] = rVal;
}
return STATUS_DEFAULT;
}
public IrStmt visit(IrMove t)
{
IrExp dst = t.dst.accept(this);
IrExp src = t.src.accept(this);
IrStmt s = mergeStmts(getStmt(dst), getStmt(src));
if (s != null)
return mergeStmts(s, new IrMove(getExp(dst), getExp(src)));
return t;
}
/* throws ParseException */
public static IrStmt STMT()
{
IrToken t;
IrCJump.OP n;
IrStmt s;
IrExp e1 = null, e2, e3;
IrExpList el=new IrExpList();
jj_consume_token(RegExpId.kw44);
switch ((jj_ntk == RegExpId.UNDEFINED) ? jj_ntk_fn() : jj_ntk)
{
case RegExpId.kwMOVE:
jj_consume_token(RegExpId.kwMOVE);
e1 = EXP();
e2 = EXP();
s = new IrMove(e1,e2);
break;
case RegExpId.kwJUMP:
jj_consume_token(RegExpId.kwJUMP);
e1 = EXP();
s = new IrJump((IrName)e1);
break;
case RegExpId.kwCJUMP:
jj_consume_token(RegExpId.kwCJUMP);
n = relopCode();
e1 = EXP();
e2 = EXP();
e3 = EXP();
s = new IrCJump(n,e1,e2,(IrName)e3);
break;
case RegExpId.kwLABEL:
jj_consume_token(RegExpId.kwLABEL);
t = jj_consume_token(RegExpId.ID);
s = new IrLabel(t.image);
break;
case RegExpId.kwCALLST:
jj_consume_token(RegExpId.kwCALLST);
e1 = EXP();
jj_consume_token(RegExpId.kw32);
RegExpId tmp2;
//label_3:
while (true)
{
tmp2 = (jj_ntk == RegExpId.UNDEFINED) ? jj_ntk_fn() : jj_ntk;
switch (tmp2)
{
case RegExpId.kw32:
break;
default:
jj_la1[3] = jj_gen;
goto label_3a; // break label_3;
}
e2 = EXP();
el.add(e2);
}
label_3a:
jj_consume_token(RegExpId.kw35);
s = new IrCallst((IrName)e1,el);
break;
case RegExpId.kwRETURN:
jj_consume_token(RegExpId.kwRETURN);
switch ((jj_ntk == RegExpId.UNDEFINED) ? jj_ntk_fn() : jj_ntk)
{
case RegExpId.kw32:
e1 = EXP();
break;
default:
jj_la1[4] = jj_gen;
break;
}
s = new IrReturn(e1);
break;
default:
jj_la1[5] = jj_gen;
jj_consume_token(RegExpId.UNDEFINED);
throw new IrParseException();
}
jj_consume_token(RegExpId.kw45);
return s;
//throw new Error("Missing return statement in function");
//return s;
}
public IrExp visit(IrCall t)
{
IrExp args = t.args.accept(this);
IrStmt s = getStmt(args);
if (t.func.id != "malloc")
{
IrTemp tmp = new IrTemp();
IrStmt s1 = new IrMove(tmp, new IrCall(t.func, (IrExpList)getExp(args)));
return new IrEseq(mergeStmts(s, s1), tmp);
}
else if (s != null)
{
return new IrEseq(s, new IrCall(t.func, (IrExpList)getExp(args)));
}
else
{
return t;
}
}