RawShape
BaselineInspector::maybeMonomorphicShapeForPropertyOp(jsbytecode *pc)
{
if (!hasBaselineScript())
return NULL;
JS_ASSERT(isValidPC(pc));
const ICEntry &entry = icEntryFromPC(pc);
ICStub *stub = entry.firstStub();
ICStub *next = stub->next();
if (!next || !next->isFallback())
return NULL;
if (stub->isGetProp_Native()) {
JS_ASSERT(next->isGetProp_Fallback());
if (next->toGetProp_Fallback()->hadUnoptimizableAccess())
return NULL;
return stub->toGetProp_Native()->shape();
}
if (stub->isSetProp_Native()) {
JS_ASSERT(next->isSetProp_Fallback());
if (next->toSetProp_Fallback()->hadUnoptimizableAccess())
return NULL;
return stub->toSetProp_Native()->shape();
}
return NULL;
}
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;
}
MIRType BaselineInspector::expectedPropertyAccessInputType(jsbytecode* pc) {
if (!hasICScript()) {
return MIRType::Value;
}
const ICEntry& entry = icEntryFromPC(pc);
MIRType type = MIRType::None;
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
MIRType stubType = MIRType::None;
if (stub->isCacheIR_Monitored()) {
stubType = GetCacheIRExpectedInputType(stub->toCacheIR_Monitored());
if (stubType == MIRType::Value) {
return MIRType::Value;
}
} else if (stub->isGetElem_Fallback() || stub->isGetProp_Fallback()) {
// If we have an unoptimizable access, don't try to optimize.
if (stub->toFallbackStub()->state().hasFailures()) {
return MIRType::Value;
}
} else {
MOZ_CRASH("Unexpected stub");
}
if (type != MIRType::None) {
if (type != stubType) {
return MIRType::Value;
}
} else {
type = stubType;
}
}
return (type == MIRType::None) ? MIRType::Value : type;
}
bool
BaselineInspector::commonGetPropFunction(jsbytecode* pc, JSObject** holder, Shape** holderShape,
JSFunction** commonGetter, Shape** globalShape,
bool* isOwnProperty,
ReceiverVector& receivers,
ObjectGroupVector& convertUnboxedGroups)
{
if (!hasBaselineScript())
return false;
MOZ_ASSERT(receivers.empty());
MOZ_ASSERT(convertUnboxedGroups.empty());
*holder = nullptr;
const ICEntry& entry = icEntryFromPC(pc);
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
if (stub->isGetProp_CallScripted() ||
stub->isGetProp_CallNative() ||
stub->isGetProp_CallNativeGlobal())
{
ICGetPropCallGetter* nstub = static_cast<ICGetPropCallGetter*>(stub);
bool isOwn = nstub->isOwnGetter();
if (!isOwn && !AddReceiver(nstub->receiverGuard(), receivers, convertUnboxedGroups))
return false;
if (!*holder) {
*holder = nstub->holder();
*holderShape = nstub->holderShape();
*commonGetter = nstub->getter();
*globalShape = GlobalShapeForGetPropFunction(nstub);
*isOwnProperty = isOwn;
} else if (nstub->holderShape() != *holderShape ||
GlobalShapeForGetPropFunction(nstub) != *globalShape ||
isOwn != *isOwnProperty)
{
return false;
} else {
MOZ_ASSERT(*commonGetter == nstub->getter());
}
} else if (stub->isGetProp_Fallback()) {
// If we have an unoptimizable access, don't try to optimize.
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
return false;
} else if (stub->isGetName_Fallback()) {
if (stub->toGetName_Fallback()->hadUnoptimizableAccess())
return false;
} else {
return false;
}
}
if (!*holder)
return false;
MOZ_ASSERT(*isOwnProperty == (receivers.empty() && convertUnboxedGroups.empty()));
return true;
}
bool
BaselineInspector::maybeShapesForPropertyOp(jsbytecode *pc, Vector<Shape *> &shapes)
{
// Return a list of shapes seen by the baseline IC for the current op.
// An empty list indicates no shapes are known, or there was an uncacheable
// access.
JS_ASSERT(shapes.empty());
if (!hasBaselineScript())
return true;
JS_ASSERT(isValidPC(pc));
const ICEntry &entry = icEntryFromPC(pc);
ICStub *stub = entry.firstStub();
while (stub->next()) {
Shape *shape;
if (stub->isGetProp_Native()) {
shape = stub->toGetProp_Native()->shape();
} else if (stub->isSetProp_Native()) {
shape = stub->toSetProp_Native()->shape();
} else {
shapes.clear();
return true;
}
// Don't add the same shape twice (this can happen if there are multiple
// SetProp_Native stubs with different TypeObject's).
bool found = false;
for (size_t i = 0; i < shapes.length(); i++) {
if (shapes[i] == shape) {
found = true;
break;
}
}
if (!found && !shapes.append(shape))
return false;
stub = stub->next();
}
if (stub->isGetProp_Fallback()) {
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
shapes.clear();
} else {
if (stub->toSetProp_Fallback()->hadUnoptimizableAccess())
shapes.clear();
}
// Don't inline if there are more than 5 shapes.
if (shapes.length() > 5)
shapes.clear();
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;
}
bool
BaselineInspector::hasSeenAccessedGetter(jsbytecode *pc)
{
if (!hasBaselineScript())
return false;
const ICEntry &entry = icEntryFromPC(pc);
ICStub *stub = entry.fallbackStub();
if (stub->isGetProp_Fallback())
return stub->toGetProp_Fallback()->hasAccessedGetter();
return false;
}
bool
BaselineInspector::commonGetPropFunction(jsbytecode* pc, bool innerized,
JSObject** holder, Shape** holderShape,
JSFunction** commonGetter, Shape** globalShape,
bool* isOwnProperty,
ReceiverVector& receivers,
ObjectGroupVector& convertUnboxedGroups)
{
if (!hasBaselineScript())
return false;
MOZ_ASSERT(receivers.empty());
MOZ_ASSERT(convertUnboxedGroups.empty());
*globalShape = nullptr;
*commonGetter = nullptr;
const ICEntry& entry = icEntryFromPC(pc);
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
if (stub->isCacheIR_Monitored()) {
if (!AddCacheIRGetPropFunction(stub->toCacheIR_Monitored(), innerized,
holder, holderShape,
commonGetter, globalShape, isOwnProperty, receivers,
convertUnboxedGroups, script))
{
return false;
}
} else if (stub->isGetProp_Fallback()) {
// If we have an unoptimizable access, don't try to optimize.
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
return false;
} else if (stub->isGetName_Fallback()) {
if (stub->toGetName_Fallback()->hadUnoptimizableAccess())
return false;
} else {
return false;
}
}
if (!*commonGetter)
return false;
MOZ_ASSERT(*isOwnProperty == !*holder);
MOZ_ASSERT(*isOwnProperty == (receivers.empty() && convertUnboxedGroups.empty()));
return true;
}
JSObject *
BaselineInspector::commonGetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonGetter,
Shape **globalShape)
{
if (!hasBaselineScript())
return nullptr;
const ICEntry &entry = icEntryFromPC(pc);
JSObject* holder = nullptr;
Shape *holderShape = nullptr;
JSFunction *getter = nullptr;
Shape *global = nullptr;
for (ICStub *stub = entry.firstStub(); stub; stub = stub->next()) {
if (stub->isGetProp_CallScripted() ||
stub->isGetProp_CallNative() ||
stub->isGetProp_CallNativePrototype())
{
ICGetPropCallGetter *nstub = static_cast<ICGetPropCallGetter *>(stub);
if (!holder) {
holder = nstub->holder();
holderShape = nstub->holderShape();
getter = nstub->getter();
global = GlobalShapeForGetPropFunction(nstub);
} else if (nstub->holderShape() != holderShape ||
GlobalShapeForGetPropFunction(nstub) != global)
{
return nullptr;
} else {
MOZ_ASSERT(getter == nstub->getter());
}
} else if (stub->isGetProp_Fallback() &&
stub->toGetProp_Fallback()->hadUnoptimizableAccess())
{
// We have an unoptimizable access, so don't try to optimize.
return nullptr;
}
}
*lastProperty = holderShape;
*commonGetter = getter;
*globalShape = global;
return holder;
}
bool
BaselineInspector::maybeInfoForPropertyOp(jsbytecode *pc,
ShapeVector &nativeShapes,
ObjectGroupVector &unboxedGroups,
ObjectGroupVector &convertUnboxedGroups)
{
// Return lists of native shapes and unboxed objects seen by the baseline
// IC for the current op. Empty lists indicate no shapes/types 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(nativeShapes.empty());
MOZ_ASSERT(unboxedGroups.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()) {
Shape *shape = nullptr;
ObjectGroup *group = nullptr;
if (stub->isGetProp_Native()) {
shape = stub->toGetProp_Native()->shape();
} else if (stub->isSetProp_Native()) {
shape = stub->toSetProp_Native()->shape();
} else if (stub->isGetProp_Unboxed()) {
group = stub->toGetProp_Unboxed()->group();
} else if (stub->isSetProp_Unboxed()) {
group = stub->toSetProp_Unboxed()->group();
} else {
nativeShapes.clear();
unboxedGroups.clear();
return true;
}
if (group && group->unboxedLayout().nativeGroup()) {
if (!VectorAppendNoDuplicate(convertUnboxedGroups, group))
return false;
shape = group->unboxedLayout().nativeShape();
group = nullptr;
}
if (shape) {
if (!VectorAppendNoDuplicate(nativeShapes, shape))
return false;
} else {
if (!VectorAppendNoDuplicate(unboxedGroups, group))
return false;
}
stub = stub->next();
}
if (stub->isGetProp_Fallback()) {
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess()) {
nativeShapes.clear();
unboxedGroups.clear();
}
} else {
if (stub->toSetProp_Fallback()->hadUnoptimizableAccess()) {
nativeShapes.clear();
unboxedGroups.clear();
}
}
// Don't inline if there are more than 5 shapes/groups.
if (nativeShapes.length() + unboxedGroups.length() > 5) {
nativeShapes.clear();
unboxedGroups.clear();
}
return true;
}
