/* 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 int visit(IrCJump s)
{
bool cond;
int left = s.left.accept(this);
int right = s.right.accept(this);
switch (s.op) {
case IrCJump.OP.EQ: cond = (left == right); break;
case IrCJump.OP.NE: cond = (left != right); break;
case IrCJump.OP.LT: cond = (left < right); break;
case IrCJump.OP.LE: cond = (left <= right); break;
case IrCJump.OP.GT: cond = (left > right); break;
case IrCJump.OP.GE: cond = (left >= right); break;
default: throw new Exception("Encountered invalid CJUMP op value");
}
if (cond)
return findStmtIdx(s.target);
else
return STATUS_DEFAULT;
}
public IrStmt visit(IrCJump t)
{
IrExp left = t.left.accept(this);
IrExp right = t.right.accept(this);
IrStmt s = mergeStmts(getStmt(left), getStmt(right));
if (s != null)
return mergeStmts(s, new IrCJump(t.op, getExp(left),
getExp(right), t.target));
return t;
}