bool
BaselineInspector::maybeInfoForPropertyOp(jsbytecode* pc, ReceiverVector& receivers,
ObjectGroupVector& convertUnboxedGroups)
{
// Return a list of the receivers seen by the baseline IC for the current
// op. Empty lists indicate no receivers are known, or there was an
// uncacheable access. convertUnboxedGroups is used for unboxed object
// groups which have been seen, but have had instances converted to native
// objects and should be eagerly converted by Ion.
MOZ_ASSERT(receivers.empty());
MOZ_ASSERT(convertUnboxedGroups.empty());
if (!hasBaselineScript())
return true;
MOZ_ASSERT(isValidPC(pc));
const ICEntry& entry = icEntryFromPC(pc);
ICStub* stub = entry.firstStub();
while (stub->next()) {
ReceiverGuard receiver;
if (stub->isCacheIR_Monitored()) {
if (!GetCacheIRReceiverForNativeReadSlot(stub->toCacheIR_Monitored(), &receiver) &&
!GetCacheIRReceiverForUnboxedProperty(stub->toCacheIR_Monitored(), &receiver))
{
receivers.clear();
return true;
}
} else if (stub->isCacheIR_Updated()) {
if (!GetCacheIRReceiverForNativeSetSlot(stub->toCacheIR_Updated(), &receiver) &&
!GetCacheIRReceiverForUnboxedProperty(stub->toCacheIR_Updated(), &receiver))
{
receivers.clear();
return true;
}
} else {
receivers.clear();
return true;
}
if (!AddReceiver(receiver, receivers, convertUnboxedGroups))
return false;
stub = stub->next();
}
if (stub->isGetProp_Fallback()) {
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
receivers.clear();
} else {
if (stub->toSetProp_Fallback()->hadUnoptimizableAccess())
receivers.clear();
}
// Don't inline if there are more than 5 receivers.
if (receivers.length() > 5)
receivers.clear();
return true;
}
bool BaselineInspector::commonSetPropFunction(
jsbytecode* pc, JSObject** holder, Shape** holderShape,
JSFunction** commonSetter, bool* isOwnProperty, ReceiverVector& receivers,
ObjectGroupVector& convertUnboxedGroups) {
if (!hasICScript()) {
return false;
}
MOZ_ASSERT(receivers.empty());
MOZ_ASSERT(convertUnboxedGroups.empty());
*commonSetter = nullptr;
const ICEntry& entry = icEntryFromPC(pc);
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
if (stub->isCacheIR_Updated()) {
if (!AddCacheIRSetPropFunction(stub->toCacheIR_Updated(), holder,
holderShape, commonSetter, isOwnProperty,
receivers, convertUnboxedGroups)) {
return false;
}
} else if (!stub->isFallback() ||
stub->toFallbackStub()->state().hasFailures()) {
// We have an unoptimizable access, so don't try to optimize.
return false;
}
}
if (!*commonSetter) {
return false;
}
MOZ_ASSERT(*isOwnProperty == !*holder);
return true;
}
bool
BaselineInspector::megamorphicGetterSetterFunction(jsbytecode* pc, bool isGetter,
JSFunction** getterOrSetter)
{
if (!hasBaselineScript())
return false;
*getterOrSetter = nullptr;
const ICEntry& entry = icEntryFromPC(pc);
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
if (stub->isCacheIR_Monitored()) {
MOZ_ASSERT(isGetter);
JSFunction* getter =
GetMegamorphicGetterSetterFunction(stub,
stub->toCacheIR_Monitored()->stubInfo(),
isGetter);
if (!getter || (*getterOrSetter && *getterOrSetter != getter))
return false;
*getterOrSetter = getter;
continue;
}
if (stub->isCacheIR_Updated()) {
MOZ_ASSERT(!isGetter);
JSFunction* setter =
GetMegamorphicGetterSetterFunction(stub,
stub->toCacheIR_Updated()->stubInfo(),
isGetter);
if (!setter || (*getterOrSetter && *getterOrSetter != setter))
return false;
*getterOrSetter = setter;
continue;
}
if (stub->isGetProp_Fallback()) {
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
return false;
if (stub->toGetProp_Fallback()->state().mode() != ICState::Mode::Megamorphic)
return false;
continue;
}
if (stub->isSetProp_Fallback()) {
if (stub->toSetProp_Fallback()->hadUnoptimizableAccess())
return false;
if (stub->toSetProp_Fallback()->state().mode() != ICState::Mode::Megamorphic)
return false;
continue;
}
return false;
}
if (!*getterOrSetter)
return false;
return true;
}
