void cgLdClsInitData(IRLS& env, const IRInstruction* inst) {
auto const dst = dstLoc(env, inst, 0).reg();
auto const cls = srcLoc(env, inst, 0).reg();
auto const offset = Class::propDataCacheOff() +
rds::Link<Class::PropInitVec*>::handleOff();
auto& v = vmain(env);
auto const handle = v.makeReg();
auto const vec = v.makeReg();
v << loadzlq{cls[offset], handle};
v << load{Vreg(rvmtl())[handle], vec};
v << load{vec[Class::PropInitVec::dataOff()], dst};
}
void cgInitObjProps(IRLS& env, const IRInstruction* inst) {
auto const cls = inst->extra<InitObjProps>()->cls;
auto const obj = srcLoc(env, inst, 0).reg();
auto& v = vmain(env);
// Set the attributes, if any.
auto const odAttrs = cls->getODAttrs();
if (odAttrs) {
static_assert(sizeof(ObjectData::Attribute) == 2,
"Codegen expects 2-byte ObjectData attributes");
assertx(!(odAttrs & 0xffff0000));
v << orwim{odAttrs, obj[ObjectData::attributeOff()], v.makeReg()};
}
// Initialize the properties.
auto const nprops = cls->numDeclProperties();
if (nprops > 0) {
if (cls->pinitVec().size() == 0) {
// If the Class has no 86pinit property-initializer functions, we can
// just copy the initial values from a data member on the Class.
implInitObjPropsFast(v, env, inst, obj, cls, nprops);
} else {
// Load the Class's propInitVec from the target cache. We know it's
// already been initialized as a pre-condition on this op.
auto const propHandle = cls->propHandle();
assertx(rds::isNormalHandle(propHandle));
auto const propInitVec = v.makeReg();
auto const propData = v.makeReg();
v << load{Vreg(rvmtl())[propHandle], propInitVec};
v << load{propInitVec[Class::PropInitVec::dataOff()], propData};
auto const propsOff = sizeof(ObjectData) + cls->builtinODTailSize();
auto args = argGroup(env, inst)
.addr(obj, safe_cast<int32_t>(propsOff))
.reg(propData);
if (!cls->hasDeepInitProps()) {
cgCallHelper(v, env, CallSpec::direct(memcpy), kVoidDest,
SyncOptions::None, args.imm(cellsToBytes(nprops)));
} else {
cgCallHelper(v, env, CallSpec::direct(deepInitHelper),
kVoidDest, SyncOptions::None, args.imm(nprops));
}
}
}
}
template<class Fn> void forEach(LiveSet& bits, Fn fn) {
for (auto i = bits.find_first(); i != bits.npos; i = bits.find_next(i)) {
fn(Vreg(i));
}
}
