void enterblock(BlockCnt bl, boolean isloop) {
bl.isloop = isloop;
bl.nactvar = nactvar;
bl.firstlabel = (short) ls.dyd.n_label;
bl.firstgoto = (short) ls.dyd.n_gt;
bl.upval = false;
bl.previous = this.bl;
this.bl = bl;
_assert(this.freereg == this.nactvar);
}
void markupval(int level) {
BlockCnt bl = this.bl;
while (bl.nactvar > level) bl = bl.previous;
bl.upval = true;
}
