void cgKillClsRef(IRLS& env, const IRInstruction* inst) {
if (!debug) return;
auto& v = vmain(env);
auto const fp = srcLoc(env, inst, 0).reg();
auto const off = frame_clsref_offset(
funcFromFp(inst->src(0)),
inst->extra<ClsRefSlotData>()->slot
);
LowPtr<Class> trash;
memset(&trash, kTrashClsRef, sizeof(trash));
Immed64 immed(trash.get());
if (sizeof(trash) == 4) {
v << storeli{immed.l(), fp[off]};
} else if (sizeof(trash) == 8) {
if (immed.fits(sz::dword)) {
v << storeqi{immed.l(), fp[off]};
} else {
v << store{v.cns(immed.q()), fp[off]};
}
} else {
not_implemented();
}
}
void NamedEntity::removeClass(Class* goner) {
Class* head = m_clsList.load(std::memory_order_acquire);
if (!head) return;
if (head == goner) {
return m_clsList.store(head->m_nextClass, std::memory_order_release);
}
LowPtr<Class>* cls = &head->m_nextClass;
while (cls->get() != goner) {
assert(*cls);
cls = &(*cls)->m_nextClass;
}
*cls = goner->m_nextClass;
}
void NamedEntity::removeClass(Class* goner) {
Class* head = m_clsList;
if (!head) return;
if (RuntimeOption::EvalEnableReverseDataMap) {
// This deregisters Classes registered to data_map in Unit::defClass().
data_map::deregister(goner);
}
if (head == goner) {
m_clsList = head->m_nextClass;
return;
}
LowPtr<Class>* cls = &head->m_nextClass;
while (cls->get() != goner) {
assertx(*cls);
cls = &(*cls)->m_nextClass;
}
*cls = goner->m_nextClass;
}
