protected Stm makeHeader(TreeFactory tf, Info info, boolean exported) {
List<Stm> stmlist = new ArrayList<Stm>(4);
// align to word boundary.
stmlist.add(new ALIGN(tf, null, 4));
// label:
stmlist.add(new LABEL(tf, null, info.label(), exported));
// claz pointer
stmlist.add(_DATUM(tf, runtime.getNameMap().label(info.type())));
// hash code.
// this is of pointer size, and must have the low bit set. we *could*
// emit a symbolic reference to info.label()+1 or some such, but
// this would complicate the pattern-matching instruction selector.
// so instead we'll just select a random number of the right length
// and set the low bit.
stmlist.add(
makeDatum(
tf,
pointersAreLong
? (Number) new Long(1 | rnd.nextLong())
: (Number) new Integer(1 | rnd.nextInt())));
// okay, done with header.
return Stm.toStm(stmlist);
}
