| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/compiler/js-call-reducer.h" |
| |
| #include "src/api.h" |
| #include "src/code-factory.h" |
| #include "src/code-stubs.h" |
| #include "src/compilation-dependencies.h" |
| #include "src/compiler/access-builder.h" |
| #include "src/compiler/js-graph.h" |
| #include "src/compiler/linkage.h" |
| #include "src/compiler/node-matchers.h" |
| #include "src/compiler/simplified-operator.h" |
| #include "src/feedback-vector-inl.h" |
| #include "src/ic/call-optimization.h" |
| #include "src/objects-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| namespace { |
| |
| bool CanBePrimitive(Node* node) { |
| switch (node->opcode()) { |
| case IrOpcode::kJSCreate: |
| case IrOpcode::kJSCreateArguments: |
| case IrOpcode::kJSCreateArray: |
| case IrOpcode::kJSCreateClosure: |
| case IrOpcode::kJSCreateEmptyLiteralArray: |
| case IrOpcode::kJSCreateEmptyLiteralObject: |
| case IrOpcode::kJSCreateIterResultObject: |
| case IrOpcode::kJSCreateKeyValueArray: |
| case IrOpcode::kJSCreateLiteralArray: |
| case IrOpcode::kJSCreateLiteralObject: |
| case IrOpcode::kJSCreateLiteralRegExp: |
| case IrOpcode::kJSConstructForwardVarargs: |
| case IrOpcode::kJSConstruct: |
| case IrOpcode::kJSConstructWithArrayLike: |
| case IrOpcode::kJSConstructWithSpread: |
| case IrOpcode::kJSConvertReceiver: |
| case IrOpcode::kJSGetSuperConstructor: |
| case IrOpcode::kJSToObject: |
| return false; |
| case IrOpcode::kHeapConstant: { |
| Handle<HeapObject> value = HeapObjectMatcher(node).Value(); |
| return value->IsPrimitive(); |
| } |
| default: |
| return true; |
| } |
| } |
| |
| bool CanBeNullOrUndefined(Node* node) { |
| if (CanBePrimitive(node)) { |
| switch (node->opcode()) { |
| case IrOpcode::kJSToBoolean: |
| case IrOpcode::kJSToInteger: |
| case IrOpcode::kJSToLength: |
| case IrOpcode::kJSToName: |
| case IrOpcode::kJSToNumber: |
| case IrOpcode::kJSToString: |
| return false; |
| case IrOpcode::kHeapConstant: { |
| Handle<HeapObject> value = HeapObjectMatcher(node).Value(); |
| Isolate* const isolate = value->GetIsolate(); |
| return value->IsNullOrUndefined(isolate); |
| } |
| default: |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| Reduction JSCallReducer::Reduce(Node* node) { |
| switch (node->opcode()) { |
| case IrOpcode::kJSConstruct: |
| return ReduceJSConstruct(node); |
| case IrOpcode::kJSConstructWithArrayLike: |
| return ReduceJSConstructWithArrayLike(node); |
| case IrOpcode::kJSConstructWithSpread: |
| return ReduceJSConstructWithSpread(node); |
| case IrOpcode::kJSCall: |
| return ReduceJSCall(node); |
| case IrOpcode::kJSCallWithArrayLike: |
| return ReduceJSCallWithArrayLike(node); |
| case IrOpcode::kJSCallWithSpread: |
| return ReduceJSCallWithSpread(node); |
| default: |
| break; |
| } |
| return NoChange(); |
| } |
| |
| void JSCallReducer::Finalize() { |
| // TODO(turbofan): This is not the best solution; ideally we would be able |
| // to teach the GraphReducer about arbitrary dependencies between different |
| // nodes, even if they don't show up in the use list of the other node. |
| std::set<Node*> const waitlist = std::move(waitlist_); |
| for (Node* node : waitlist) { |
| if (!node->IsDead()) { |
| Reduction const reduction = Reduce(node); |
| if (reduction.Changed()) { |
| Node* replacement = reduction.replacement(); |
| if (replacement != node) { |
| Replace(node, replacement); |
| } |
| } |
| } |
| } |
| } |
| |
| // ES6 section 22.1.1 The Array Constructor |
| Reduction JSCallReducer::ReduceArrayConstructor(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* target = NodeProperties::GetValueInput(node, 0); |
| CallParameters const& p = CallParametersOf(node->op()); |
| |
| // Turn the {node} into a {JSCreateArray} call. |
| DCHECK_LE(2u, p.arity()); |
| Handle<AllocationSite> site; |
| size_t const arity = p.arity() - 2; |
| NodeProperties::ReplaceValueInput(node, target, 0); |
| NodeProperties::ReplaceValueInput(node, target, 1); |
| NodeProperties::ChangeOp(node, javascript()->CreateArray(arity, site)); |
| return Changed(node); |
| } |
| |
| // ES6 section 19.3.1.1 Boolean ( value ) |
| Reduction JSCallReducer::ReduceBooleanConstructor(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| |
| // Replace the {node} with a proper {JSToBoolean} operator. |
| DCHECK_LE(2u, p.arity()); |
| Node* value = (p.arity() == 2) ? jsgraph()->UndefinedConstant() |
| : NodeProperties::GetValueInput(node, 2); |
| Node* context = NodeProperties::GetContextInput(node); |
| value = graph()->NewNode(javascript()->ToBoolean(ToBooleanHint::kAny), value, |
| context); |
| ReplaceWithValue(node, value); |
| return Replace(value); |
| } |
| |
| // ES6 section 20.1.1 The Number Constructor |
| Reduction JSCallReducer::ReduceNumberConstructor(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| |
| // Turn the {node} into a {JSToNumber} call. |
| DCHECK_LE(2u, p.arity()); |
| Node* value = (p.arity() == 2) ? jsgraph()->ZeroConstant() |
| : NodeProperties::GetValueInput(node, 2); |
| NodeProperties::ReplaceValueInputs(node, value); |
| NodeProperties::ChangeOp(node, javascript()->ToNumber()); |
| return Changed(node); |
| } |
| |
| // ES section #sec-object-constructor |
| Reduction JSCallReducer::ReduceObjectConstructor(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| if (p.arity() < 3) return NoChange(); |
| Node* value = (p.arity() >= 3) ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| |
| // We can fold away the Object(x) call if |x| is definitely not a primitive. |
| if (CanBePrimitive(value)) { |
| if (!CanBeNullOrUndefined(value)) { |
| // Turn the {node} into a {JSToObject} call if we know that |
| // the {value} cannot be null or undefined. |
| NodeProperties::ReplaceValueInputs(node, value); |
| NodeProperties::ChangeOp(node, javascript()->ToObject()); |
| return Changed(node); |
| } |
| } else { |
| ReplaceWithValue(node, value); |
| return Replace(node); |
| } |
| return NoChange(); |
| } |
| |
| // ES6 section 19.2.3.1 Function.prototype.apply ( thisArg, argArray ) |
| Reduction JSCallReducer::ReduceFunctionPrototypeApply(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| size_t arity = p.arity(); |
| DCHECK_LE(2u, arity); |
| ConvertReceiverMode convert_mode = ConvertReceiverMode::kAny; |
| if (arity == 2) { |
| // Neither thisArg nor argArray was provided. |
| convert_mode = ConvertReceiverMode::kNullOrUndefined; |
| node->ReplaceInput(0, node->InputAt(1)); |
| node->ReplaceInput(1, jsgraph()->UndefinedConstant()); |
| } else if (arity == 3) { |
| // The argArray was not provided, just remove the {target}. |
| node->RemoveInput(0); |
| --arity; |
| } else { |
| Node* target = NodeProperties::GetValueInput(node, 1); |
| Node* this_argument = NodeProperties::GetValueInput(node, 2); |
| Node* arguments_list = NodeProperties::GetValueInput(node, 3); |
| Node* context = NodeProperties::GetContextInput(node); |
| Node* frame_state = NodeProperties::GetFrameStateInput(node); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| |
| // If {arguments_list} cannot be null or undefined, we don't need |
| // to expand this {node} to control-flow. |
| if (!CanBeNullOrUndefined(arguments_list)) { |
| // Massage the value inputs appropriately. |
| node->ReplaceInput(0, target); |
| node->ReplaceInput(1, this_argument); |
| node->ReplaceInput(2, arguments_list); |
| while (arity-- > 3) node->RemoveInput(3); |
| |
| // Morph the {node} to a {JSCallWithArrayLike}. |
| NodeProperties::ChangeOp(node, |
| javascript()->CallWithArrayLike(p.frequency())); |
| Reduction const reduction = ReduceJSCallWithArrayLike(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } else { |
| // Check whether {arguments_list} is null. |
| Node* check_null = |
| graph()->NewNode(simplified()->ReferenceEqual(), arguments_list, |
| jsgraph()->NullConstant()); |
| control = graph()->NewNode(common()->Branch(BranchHint::kFalse), |
| check_null, control); |
| Node* if_null = graph()->NewNode(common()->IfTrue(), control); |
| control = graph()->NewNode(common()->IfFalse(), control); |
| |
| // Check whether {arguments_list} is undefined. |
| Node* check_undefined = |
| graph()->NewNode(simplified()->ReferenceEqual(), arguments_list, |
| jsgraph()->UndefinedConstant()); |
| control = graph()->NewNode(common()->Branch(BranchHint::kFalse), |
| check_undefined, control); |
| Node* if_undefined = graph()->NewNode(common()->IfTrue(), control); |
| control = graph()->NewNode(common()->IfFalse(), control); |
| |
| // Lower to {JSCallWithArrayLike} if {arguments_list} is neither null |
| // nor undefined. |
| Node* effect0 = effect; |
| Node* control0 = control; |
| Node* value0 = effect0 = control0 = graph()->NewNode( |
| javascript()->CallWithArrayLike(p.frequency()), target, this_argument, |
| arguments_list, context, frame_state, effect0, control0); |
| |
| // Lower to {JSCall} if {arguments_list} is either null or undefined. |
| Node* effect1 = effect; |
| Node* control1 = |
| graph()->NewNode(common()->Merge(2), if_null, if_undefined); |
| Node* value1 = effect1 = control1 = |
| graph()->NewNode(javascript()->Call(2), target, this_argument, |
| context, frame_state, effect1, control1); |
| |
| // Rewire potential exception edges. |
| Node* if_exception = nullptr; |
| if (NodeProperties::IsExceptionalCall(node, &if_exception)) { |
| // Create appropriate {IfException} and {IfSuccess} nodes. |
| Node* if_exception0 = |
| graph()->NewNode(common()->IfException(), control0, effect0); |
| control0 = graph()->NewNode(common()->IfSuccess(), control0); |
| Node* if_exception1 = |
| graph()->NewNode(common()->IfException(), control1, effect1); |
| control1 = graph()->NewNode(common()->IfSuccess(), control1); |
| |
| // Join the exception edges. |
| Node* merge = |
| graph()->NewNode(common()->Merge(2), if_exception0, if_exception1); |
| Node* ephi = graph()->NewNode(common()->EffectPhi(2), if_exception0, |
| if_exception1, merge); |
| Node* phi = |
| graph()->NewNode(common()->Phi(MachineRepresentation::kTagged, 2), |
| if_exception0, if_exception1, merge); |
| ReplaceWithValue(if_exception, phi, ephi, merge); |
| } |
| |
| // Join control paths. |
| control = graph()->NewNode(common()->Merge(2), control0, control1); |
| effect = |
| graph()->NewNode(common()->EffectPhi(2), effect0, effect1, control); |
| Node* value = |
| graph()->NewNode(common()->Phi(MachineRepresentation::kTagged, 2), |
| value0, value1, control); |
| ReplaceWithValue(node, value, effect, control); |
| return Replace(value); |
| } |
| } |
| // Change {node} to the new {JSCall} operator. |
| NodeProperties::ChangeOp( |
| node, |
| javascript()->Call(arity, p.frequency(), VectorSlotPair(), convert_mode)); |
| // Try to further reduce the JSCall {node}. |
| Reduction const reduction = ReduceJSCall(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| |
| |
| // ES6 section 19.2.3.3 Function.prototype.call (thisArg, ...args) |
| Reduction JSCallReducer::ReduceFunctionPrototypeCall(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| Handle<JSFunction> call = Handle<JSFunction>::cast( |
| HeapObjectMatcher(NodeProperties::GetValueInput(node, 0)).Value()); |
| // Change context of {node} to the Function.prototype.call context, |
| // to ensure any exception is thrown in the correct context. |
| NodeProperties::ReplaceContextInput( |
| node, jsgraph()->HeapConstant(handle(call->context(), isolate()))); |
| // Remove the target from {node} and use the receiver as target instead, and |
| // the thisArg becomes the new target. If thisArg was not provided, insert |
| // undefined instead. |
| size_t arity = p.arity(); |
| DCHECK_LE(2u, arity); |
| ConvertReceiverMode convert_mode; |
| if (arity == 2) { |
| // The thisArg was not provided, use undefined as receiver. |
| convert_mode = ConvertReceiverMode::kNullOrUndefined; |
| node->ReplaceInput(0, node->InputAt(1)); |
| node->ReplaceInput(1, jsgraph()->UndefinedConstant()); |
| } else { |
| // Just remove the target, which is the first value input. |
| convert_mode = ConvertReceiverMode::kAny; |
| node->RemoveInput(0); |
| --arity; |
| } |
| NodeProperties::ChangeOp( |
| node, |
| javascript()->Call(arity, p.frequency(), VectorSlotPair(), convert_mode)); |
| // Try to further reduce the JSCall {node}. |
| Reduction const reduction = ReduceJSCall(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| |
| // ES6 section 19.2.3.6 Function.prototype [ @@hasInstance ] (V) |
| Reduction JSCallReducer::ReduceFunctionPrototypeHasInstance(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| Node* object = (node->op()->ValueInputCount() >= 3) |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| Node* context = NodeProperties::GetContextInput(node); |
| Node* frame_state = NodeProperties::GetFrameStateInput(node); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| |
| // TODO(turbofan): If JSOrdinaryToInstance raises an exception, the |
| // stack trace doesn't contain the @@hasInstance call; we have the |
| // corresponding bug in the baseline case. Some massaging of the frame |
| // state would be necessary here. |
| |
| // Morph this {node} into a JSOrdinaryHasInstance node. |
| node->ReplaceInput(0, receiver); |
| node->ReplaceInput(1, object); |
| node->ReplaceInput(2, context); |
| node->ReplaceInput(3, frame_state); |
| node->ReplaceInput(4, effect); |
| node->ReplaceInput(5, control); |
| node->TrimInputCount(6); |
| NodeProperties::ChangeOp(node, javascript()->OrdinaryHasInstance()); |
| return Changed(node); |
| } |
| |
| Reduction JSCallReducer::ReduceObjectGetPrototype(Node* node, Node* object) { |
| Node* effect = NodeProperties::GetEffectInput(node); |
| |
| // Try to determine the {object} map. |
| ZoneHandleSet<Map> object_maps; |
| NodeProperties::InferReceiverMapsResult result = |
| NodeProperties::InferReceiverMaps(object, effect, &object_maps); |
| if (result != NodeProperties::kNoReceiverMaps) { |
| Handle<Map> candidate_map = object_maps[0]; |
| Handle<Object> candidate_prototype(candidate_map->prototype(), isolate()); |
| |
| // Check if we can constant-fold the {candidate_prototype}. |
| for (size_t i = 0; i < object_maps.size(); ++i) { |
| Handle<Map> object_map = object_maps[i]; |
| if (object_map->IsSpecialReceiverMap() || |
| object_map->has_hidden_prototype() || |
| object_map->prototype() != *candidate_prototype) { |
| // We exclude special receivers, like JSProxy or API objects that |
| // might require access checks here; we also don't want to deal |
| // with hidden prototypes at this point. |
| return NoChange(); |
| } |
| // The above check also excludes maps for primitive values, which is |
| // important because we are not applying [[ToObject]] here as expected. |
| DCHECK(!object_map->IsPrimitiveMap() && object_map->IsJSReceiverMap()); |
| if (result == NodeProperties::kUnreliableReceiverMaps && |
| !object_map->is_stable()) { |
| return NoChange(); |
| } |
| } |
| if (result == NodeProperties::kUnreliableReceiverMaps) { |
| for (size_t i = 0; i < object_maps.size(); ++i) { |
| dependencies()->AssumeMapStable(object_maps[i]); |
| } |
| } |
| Node* value = jsgraph()->Constant(candidate_prototype); |
| ReplaceWithValue(node, value); |
| return Replace(value); |
| } |
| |
| return NoChange(); |
| } |
| |
| // ES6 section 19.1.2.11 Object.getPrototypeOf ( O ) |
| Reduction JSCallReducer::ReduceObjectGetPrototypeOf(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* object = (node->op()->ValueInputCount() >= 3) |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| return ReduceObjectGetPrototype(node, object); |
| } |
| |
| // ES6 section B.2.2.1.1 get Object.prototype.__proto__ |
| Reduction JSCallReducer::ReduceObjectPrototypeGetProto(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| return ReduceObjectGetPrototype(node, receiver); |
| } |
| |
| // ES #sec-object.prototype.hasownproperty |
| Reduction JSCallReducer::ReduceObjectPrototypeHasOwnProperty(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& params = CallParametersOf(node->op()); |
| int const argc = static_cast<int>(params.arity() - 2); |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| Node* name = (argc >= 1) ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| |
| // We can optimize a call to Object.prototype.hasOwnProperty if it's being |
| // used inside a fast-mode for..in, so for code like this: |
| // |
| // for (name in receiver) { |
| // if (receiver.hasOwnProperty(name)) { |
| // ... |
| // } |
| // } |
| // |
| // If the for..in is in fast-mode, we know that the {receiver} has {name} |
| // as own property, otherwise the enumeration wouldn't include it. The graph |
| // constructed by the BytecodeGraphBuilder in this case looks like this: |
| |
| // receiver |
| // ^ ^ |
| // | | |
| // | +-+ |
| // | | |
| // | JSToObject |
| // | ^ |
| // | | |
| // | JSForInNext |
| // | ^ |
| // +----+ | |
| // | | |
| // JSCall[hasOwnProperty] |
| |
| // We can constant-fold the {node} to True in this case, and insert |
| // a (potentially redundant) map check to guard the fact that the |
| // {receiver} map didn't change since the dominating JSForInNext. This |
| // map check is only necessary when TurboFan cannot prove that there |
| // is no observable side effect between the {JSForInNext} and the |
| // {JSCall} to Object.prototype.hasOwnProperty. |
| // |
| // Also note that it's safe to look through the {JSToObject}, since the |
| // Object.prototype.hasOwnProperty does an implicit ToObject anyway, and |
| // these operations are not observable. |
| if (name->opcode() == IrOpcode::kJSForInNext) { |
| ForInMode const mode = ForInModeOf(name->op()); |
| if (mode != ForInMode::kGeneric) { |
| Node* object = NodeProperties::GetValueInput(name, 0); |
| Node* cache_type = NodeProperties::GetValueInput(name, 2); |
| if (object->opcode() == IrOpcode::kJSToObject) { |
| object = NodeProperties::GetValueInput(object, 0); |
| } |
| if (object == receiver) { |
| // No need to repeat the map check if we can prove that there's no |
| // observable side effect between {effect} and {name]. |
| if (!NodeProperties::NoObservableSideEffectBetween(effect, name)) { |
| Node* receiver_map = effect = |
| graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), |
| receiver, effect, control); |
| Node* check = graph()->NewNode(simplified()->ReferenceEqual(), |
| receiver_map, cache_type); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check, effect, control); |
| } |
| Node* value = jsgraph()->TrueConstant(); |
| ReplaceWithValue(node, value, effect, control); |
| return Replace(value); |
| } |
| } |
| } |
| |
| return NoChange(); |
| } |
| |
| // ES #sec-object.prototype.isprototypeof |
| Reduction JSCallReducer::ReduceObjectPrototypeIsPrototypeOf(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| Node* value = node->op()->ValueInputCount() > 2 |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| |
| // Ensure that the {receiver} is known to be a JSReceiver (so that |
| // the ToObject step of Object.prototype.isPrototypeOf is a no-op). |
| ZoneHandleSet<Map> receiver_maps; |
| NodeProperties::InferReceiverMapsResult result = |
| NodeProperties::InferReceiverMaps(receiver, effect, &receiver_maps); |
| if (result == NodeProperties::kNoReceiverMaps) return NoChange(); |
| for (size_t i = 0; i < receiver_maps.size(); ++i) { |
| if (!receiver_maps[i]->IsJSReceiverMap()) return NoChange(); |
| } |
| |
| // We don't check whether {value} is a proper JSReceiver here explicitly, |
| // and don't explicitly rule out Primitive {value}s, since all of them |
| // have null as their prototype, so the prototype chain walk inside the |
| // JSHasInPrototypeChain operator immediately aborts and yields false. |
| NodeProperties::ReplaceValueInput(node, value, 0); |
| NodeProperties::ReplaceValueInput(node, receiver, 1); |
| for (int i = node->op()->ValueInputCount(); i-- > 2;) { |
| node->RemoveInput(i); |
| } |
| NodeProperties::ChangeOp(node, javascript()->HasInPrototypeChain()); |
| return Changed(node); |
| } |
| |
| // ES6 section 26.1.1 Reflect.apply ( target, thisArgument, argumentsList ) |
| Reduction JSCallReducer::ReduceReflectApply(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| int arity = static_cast<int>(p.arity() - 2); |
| DCHECK_LE(0, arity); |
| // Massage value inputs appropriately. |
| node->RemoveInput(0); |
| node->RemoveInput(0); |
| while (arity < 3) { |
| node->InsertInput(graph()->zone(), arity++, jsgraph()->UndefinedConstant()); |
| } |
| while (arity-- > 3) { |
| node->RemoveInput(arity); |
| } |
| NodeProperties::ChangeOp(node, |
| javascript()->CallWithArrayLike(p.frequency())); |
| Reduction const reduction = ReduceJSCallWithArrayLike(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| |
| // ES6 section 26.1.2 Reflect.construct ( target, argumentsList [, newTarget] ) |
| Reduction JSCallReducer::ReduceReflectConstruct(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| int arity = static_cast<int>(p.arity() - 2); |
| DCHECK_LE(0, arity); |
| // Massage value inputs appropriately. |
| node->RemoveInput(0); |
| node->RemoveInput(0); |
| while (arity < 2) { |
| node->InsertInput(graph()->zone(), arity++, jsgraph()->UndefinedConstant()); |
| } |
| if (arity < 3) { |
| node->InsertInput(graph()->zone(), arity++, node->InputAt(0)); |
| } |
| while (arity-- > 3) { |
| node->RemoveInput(arity); |
| } |
| NodeProperties::ChangeOp(node, |
| javascript()->ConstructWithArrayLike(p.frequency())); |
| Reduction const reduction = ReduceJSConstructWithArrayLike(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| |
| // ES6 section 26.1.7 Reflect.getPrototypeOf ( target ) |
| Reduction JSCallReducer::ReduceReflectGetPrototypeOf(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* target = (node->op()->ValueInputCount() >= 3) |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| return ReduceObjectGetPrototype(node, target); |
| } |
| |
| bool CanInlineArrayIteratingBuiltin(Handle<Map> receiver_map) { |
| Isolate* const isolate = receiver_map->GetIsolate(); |
| if (!receiver_map->prototype()->IsJSArray()) return false; |
| Handle<JSArray> receiver_prototype(JSArray::cast(receiver_map->prototype()), |
| isolate); |
| return receiver_map->instance_type() == JS_ARRAY_TYPE && |
| IsFastElementsKind(receiver_map->elements_kind()) && |
| (!receiver_map->is_prototype_map() || receiver_map->is_stable()) && |
| isolate->IsFastArrayConstructorPrototypeChainIntact() && |
| isolate->IsAnyInitialArrayPrototype(receiver_prototype); |
| } |
| |
| Reduction JSCallReducer::ReduceArrayForEach(Handle<JSFunction> function, |
| Node* node) { |
| if (!FLAG_turbo_inline_array_builtins) return NoChange(); |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* outer_frame_state = NodeProperties::GetFrameStateInput(node); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| Node* context = NodeProperties::GetContextInput(node); |
| CallParameters const& p = CallParametersOf(node->op()); |
| |
| // Try to determine the {receiver} map. |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| Node* fncallback = node->op()->ValueInputCount() > 2 |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| Node* this_arg = node->op()->ValueInputCount() > 3 |
| ? NodeProperties::GetValueInput(node, 3) |
| : jsgraph()->UndefinedConstant(); |
| ZoneHandleSet<Map> receiver_maps; |
| NodeProperties::InferReceiverMapsResult result = |
| NodeProperties::InferReceiverMaps(receiver, effect, &receiver_maps); |
| if (result != NodeProperties::kReliableReceiverMaps) { |
| return NoChange(); |
| } |
| if (receiver_maps.size() != 1) return NoChange(); |
| Handle<Map> receiver_map(receiver_maps[0]); |
| ElementsKind kind = receiver_map->elements_kind(); |
| // TODO(danno): Handle double packed elements |
| if (!IsFastElementsKind(kind) || IsDoubleElementsKind(kind) || |
| !CanInlineArrayIteratingBuiltin(receiver_map)) { |
| return NoChange(); |
| } |
| |
| // Install code dependencies on the {receiver} prototype maps and the |
| // global array protector cell. |
| dependencies()->AssumePropertyCell(factory()->array_protector()); |
| |
| Node* k = jsgraph()->ZeroConstant(); |
| |
| Node* original_length = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSArrayLength(PACKED_ELEMENTS)), |
| receiver, effect, control); |
| |
| std::vector<Node*> checkpoint_params( |
| {receiver, fncallback, this_arg, k, original_length}); |
| const int stack_parameters = static_cast<int>(checkpoint_params.size()); |
| |
| // Check whether the given callback function is callable. Note that this has |
| // to happen outside the loop to make sure we also throw on empty arrays. |
| Node* check = graph()->NewNode(simplified()->ObjectIsCallable(), fncallback); |
| Node* check_branch = |
| graph()->NewNode(common()->Branch(BranchHint::kTrue), check, control); |
| Node* check_fail = graph()->NewNode(common()->IfFalse(), check_branch); |
| Node* check_frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayForEachLoopLazyDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::LAZY); |
| Node* check_throw = check_fail = graph()->NewNode( |
| javascript()->CallRuntime(Runtime::kThrowCalledNonCallable), fncallback, |
| context, check_frame_state, effect, check_fail); |
| control = graph()->NewNode(common()->IfTrue(), check_branch); |
| |
| // Start the loop. |
| Node* loop = control = graph()->NewNode(common()->Loop(2), control, control); |
| Node* eloop = effect = |
| graph()->NewNode(common()->EffectPhi(2), effect, effect, loop); |
| Node* vloop = k = graph()->NewNode( |
| common()->Phi(MachineRepresentation::kTagged, 2), k, k, loop); |
| checkpoint_params[3] = k; |
| |
| control = loop; |
| effect = eloop; |
| |
| Node* continue_test = |
| graph()->NewNode(simplified()->NumberLessThan(), k, original_length); |
| Node* continue_branch = graph()->NewNode(common()->Branch(BranchHint::kTrue), |
| continue_test, control); |
| |
| Node* if_true = graph()->NewNode(common()->IfTrue(), continue_branch); |
| Node* if_false = graph()->NewNode(common()->IfFalse(), continue_branch); |
| control = if_true; |
| |
| Node* frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayForEachLoopEagerDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::EAGER); |
| |
| effect = |
| graph()->NewNode(common()->Checkpoint(), frame_state, effect, control); |
| |
| // Make sure the map hasn't changed during the iteration |
| Node* orig_map = jsgraph()->HeapConstant(receiver_map); |
| Node* array_map = effect = |
| graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), |
| receiver, effect, control); |
| Node* check_map = |
| graph()->NewNode(simplified()->ReferenceEqual(), array_map, orig_map); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check_map, effect, control); |
| |
| // Make sure that the access is still in bounds, since the callback could have |
| // changed the array's size. |
| Node* length = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSArrayLength(PACKED_ELEMENTS)), |
| receiver, effect, control); |
| k = effect = |
| graph()->NewNode(simplified()->CheckBounds(), k, length, effect, control); |
| |
| // Reload the elements pointer before calling the callback, since the previous |
| // callback might have resized the array causing the elements buffer to be |
| // re-allocated. |
| Node* elements = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSObjectElements()), receiver, |
| effect, control); |
| |
| Node* element = graph()->NewNode( |
| simplified()->LoadElement(AccessBuilder::ForFixedArrayElement()), |
| elements, k, effect, control); |
| |
| Node* next_k = |
| graph()->NewNode(simplified()->NumberAdd(), k, jsgraph()->Constant(1)); |
| checkpoint_params[3] = next_k; |
| |
| Node* hole_true = nullptr; |
| Node* hole_false = nullptr; |
| Node* effect_true = effect; |
| |
| if (IsHoleyElementsKind(kind)) { |
| // Holey elements kind require a hole check and skipping of the element in |
| // the case of a hole. |
| Node* check = graph()->NewNode(simplified()->ReferenceEqual(), element, |
| jsgraph()->TheHoleConstant()); |
| Node* branch = |
| graph()->NewNode(common()->Branch(BranchHint::kFalse), check, control); |
| hole_true = graph()->NewNode(common()->IfTrue(), branch); |
| hole_false = graph()->NewNode(common()->IfFalse(), branch); |
| control = hole_false; |
| } |
| |
| frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayForEachLoopLazyDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::LAZY); |
| |
| control = effect = graph()->NewNode( |
| javascript()->Call(5, p.frequency()), fncallback, this_arg, element, k, |
| receiver, context, frame_state, effect, control); |
| |
| // Rewire potential exception edges. |
| Node* on_exception = nullptr; |
| if (NodeProperties::IsExceptionalCall(node, &on_exception)) { |
| // Create appropriate {IfException} and {IfSuccess} nodes. |
| Node* if_exception0 = |
| graph()->NewNode(common()->IfException(), check_throw, check_fail); |
| check_fail = graph()->NewNode(common()->IfSuccess(), check_fail); |
| Node* if_exception1 = |
| graph()->NewNode(common()->IfException(), effect, control); |
| control = graph()->NewNode(common()->IfSuccess(), control); |
| |
| // Join the exception edges. |
| Node* merge = |
| graph()->NewNode(common()->Merge(2), if_exception0, if_exception1); |
| Node* ephi = graph()->NewNode(common()->EffectPhi(2), if_exception0, |
| if_exception1, merge); |
| Node* phi = |
| graph()->NewNode(common()->Phi(MachineRepresentation::kTagged, 2), |
| if_exception0, if_exception1, merge); |
| ReplaceWithValue(on_exception, phi, ephi, merge); |
| } |
| |
| if (IsHoleyElementsKind(kind)) { |
| Node* after_call_control = control; |
| Node* after_call_effect = effect; |
| control = hole_true; |
| effect = effect_true; |
| |
| control = graph()->NewNode(common()->Merge(2), control, after_call_control); |
| effect = graph()->NewNode(common()->EffectPhi(2), effect, after_call_effect, |
| control); |
| } |
| |
| k = next_k; |
| |
| loop->ReplaceInput(1, control); |
| vloop->ReplaceInput(1, k); |
| eloop->ReplaceInput(1, effect); |
| |
| control = if_false; |
| effect = eloop; |
| |
| // The above %ThrowCalledNonCallable runtime call is an unconditional |
| // throw, making it impossible to return a successful completion in this |
| // case. We simply connect the successful completion to the graph end. |
| Node* terminate = |
| graph()->NewNode(common()->Throw(), check_throw, check_fail); |
| NodeProperties::MergeControlToEnd(graph(), common(), terminate); |
| |
| ReplaceWithValue(node, jsgraph()->UndefinedConstant(), effect, control); |
| return Replace(jsgraph()->UndefinedConstant()); |
| } |
| |
| Reduction JSCallReducer::ReduceArrayMap(Handle<JSFunction> function, |
| Node* node) { |
| if (!FLAG_turbo_inline_array_builtins) return NoChange(); |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* outer_frame_state = NodeProperties::GetFrameStateInput(node); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| Node* context = NodeProperties::GetContextInput(node); |
| CallParameters const& p = CallParametersOf(node->op()); |
| |
| // Try to determine the {receiver} map. |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| Node* fncallback = node->op()->ValueInputCount() > 2 |
| ? NodeProperties::GetValueInput(node, 2) |
| : jsgraph()->UndefinedConstant(); |
| Node* this_arg = node->op()->ValueInputCount() > 3 |
| ? NodeProperties::GetValueInput(node, 3) |
| : jsgraph()->UndefinedConstant(); |
| ZoneHandleSet<Map> receiver_maps; |
| NodeProperties::InferReceiverMapsResult result = |
| NodeProperties::InferReceiverMaps(receiver, effect, &receiver_maps); |
| if (result != NodeProperties::kReliableReceiverMaps) { |
| return NoChange(); |
| } |
| if (receiver_maps.size() != 1) return NoChange(); |
| Handle<Map> receiver_map(receiver_maps[0]); |
| ElementsKind kind = receiver_map->elements_kind(); |
| // TODO(danno): Handle holey Smi and Object fast elements kinds and double |
| // packed. |
| if (!IsFastPackedElementsKind(kind) || IsDoubleElementsKind(kind)) { |
| return NoChange(); |
| } |
| |
| // We want the input to be a generic Array. |
| Handle<JSFunction> handle_constructor( |
| JSFunction::cast( |
| native_context()->GetInitialJSArrayMap(kind)->GetConstructor()), |
| isolate()); |
| Node* array_constructor = jsgraph()->HeapConstant(handle_constructor); |
| if (receiver_map->prototype() != |
| native_context()->get(Context::INITIAL_ARRAY_PROTOTYPE_INDEX)) { |
| return NoChange(); |
| } |
| |
| // And ensure that any changes to the Array species constructor cause deopt. |
| if (!isolate()->IsArraySpeciesLookupChainIntact()) return NoChange(); |
| |
| dependencies()->AssumePropertyCell(factory()->species_protector()); |
| |
| Node* k = jsgraph()->ZeroConstant(); |
| Node* orig_map = jsgraph()->HeapConstant(receiver_map); |
| |
| // Make sure the map hasn't changed before we construct the output array. |
| { |
| Node* array_map = effect = |
| graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), |
| receiver, effect, control); |
| Node* check_map = |
| graph()->NewNode(simplified()->ReferenceEqual(), array_map, orig_map); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check_map, effect, control); |
| } |
| |
| Node* original_length = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSArrayLength(PACKED_ELEMENTS)), |
| receiver, effect, control); |
| |
| // This array should be HOLEY_SMI_ELEMENTS because of the non-zero length. |
| // Even though {JSCreateArray} is not marked as {kNoThrow}, we can elide the |
| // exceptional projections because it cannot throw with the given parameters. |
| Node* a = control = effect = graph()->NewNode( |
| javascript()->CreateArray(1, Handle<AllocationSite>::null()), |
| array_constructor, array_constructor, original_length, context, |
| outer_frame_state, effect, control); |
| |
| std::vector<Node*> checkpoint_params( |
| {receiver, fncallback, this_arg, a, k, original_length}); |
| const int stack_parameters = static_cast<int>(checkpoint_params.size()); |
| |
| // Check whether the given callback function is callable. Note that this has |
| // to happen outside the loop to make sure we also throw on empty arrays. |
| Node* check = graph()->NewNode(simplified()->ObjectIsCallable(), fncallback); |
| Node* check_branch = |
| graph()->NewNode(common()->Branch(BranchHint::kTrue), check, control); |
| Node* check_fail = graph()->NewNode(common()->IfFalse(), check_branch); |
| Node* check_frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayMapLoopLazyDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::LAZY); |
| Node* check_throw = check_fail = graph()->NewNode( |
| javascript()->CallRuntime(Runtime::kThrowCalledNonCallable), fncallback, |
| context, check_frame_state, effect, check_fail); |
| control = graph()->NewNode(common()->IfTrue(), check_branch); |
| |
| // Start the loop. |
| Node* loop = control = graph()->NewNode(common()->Loop(2), control, control); |
| Node* eloop = effect = |
| graph()->NewNode(common()->EffectPhi(2), effect, effect, loop); |
| Node* vloop = k = graph()->NewNode( |
| common()->Phi(MachineRepresentation::kTagged, 2), k, k, loop); |
| checkpoint_params[4] = k; |
| |
| control = loop; |
| effect = eloop; |
| |
| Node* continue_test = |
| graph()->NewNode(simplified()->NumberLessThan(), k, original_length); |
| Node* continue_branch = graph()->NewNode(common()->Branch(BranchHint::kTrue), |
| continue_test, control); |
| |
| Node* if_true = graph()->NewNode(common()->IfTrue(), continue_branch); |
| Node* if_false = graph()->NewNode(common()->IfFalse(), continue_branch); |
| control = if_true; |
| |
| Node* frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayMapLoopEagerDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::EAGER); |
| |
| effect = |
| graph()->NewNode(common()->Checkpoint(), frame_state, effect, control); |
| |
| // Make sure the map hasn't changed during the iteration |
| Node* array_map = effect = |
| graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), |
| receiver, effect, control); |
| Node* check_map = |
| graph()->NewNode(simplified()->ReferenceEqual(), array_map, orig_map); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check_map, effect, control); |
| |
| // Make sure that the access is still in bounds, since the callback could have |
| // changed the array's size. |
| Node* length = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSArrayLength(PACKED_ELEMENTS)), |
| receiver, effect, control); |
| k = effect = |
| graph()->NewNode(simplified()->CheckBounds(), k, length, effect, control); |
| |
| // Reload the elements pointer before calling the callback, since the previous |
| // callback might have resized the array causing the elements buffer to be |
| // re-allocated. |
| Node* elements = graph()->NewNode( |
| simplified()->LoadField(AccessBuilder::ForJSObjectElements()), receiver, |
| effect, control); |
| |
| Node* element = graph()->NewNode( |
| simplified()->LoadElement(AccessBuilder::ForFixedArrayElement()), |
| elements, k, effect, control); |
| |
| Node* next_k = |
| graph()->NewNode(simplified()->NumberAdd(), k, jsgraph()->OneConstant()); |
| |
| // This frame state is dealt with by hand in |
| // ArrayMapLoopLazyDeoptContinuation. |
| frame_state = CreateJavaScriptBuiltinContinuationFrameState( |
| jsgraph(), function, Builtins::kArrayMapLoopLazyDeoptContinuation, |
| node->InputAt(0), context, &checkpoint_params[0], stack_parameters, |
| outer_frame_state, ContinuationFrameStateMode::LAZY); |
| |
| Node* callback_value = control = effect = graph()->NewNode( |
| javascript()->Call(5, p.frequency()), fncallback, this_arg, element, k, |
| receiver, context, frame_state, effect, control); |
| |
| // Rewire potential exception edges. |
| Node* on_exception = nullptr; |
| if (NodeProperties::IsExceptionalCall(node, &on_exception)) { |
| // Create appropriate {IfException} and {IfSuccess} nodes. |
| Node* if_exception0 = |
| graph()->NewNode(common()->IfException(), check_throw, check_fail); |
| check_fail = graph()->NewNode(common()->IfSuccess(), check_fail); |
| Node* if_exception1 = |
| graph()->NewNode(common()->IfException(), effect, control); |
| control = graph()->NewNode(common()->IfSuccess(), control); |
| |
| // Join the exception edges. |
| Node* merge = |
| graph()->NewNode(common()->Merge(2), if_exception0, if_exception1); |
| Node* ephi = graph()->NewNode(common()->EffectPhi(2), if_exception0, |
| if_exception1, merge); |
| Node* phi = |
| graph()->NewNode(common()->Phi(MachineRepresentation::kTagged, 2), |
| if_exception0, if_exception1, merge); |
| ReplaceWithValue(on_exception, phi, ephi, merge); |
| } |
| |
| Handle<Map> double_map(Map::cast( |
| native_context()->get(Context::ArrayMapIndex(HOLEY_DOUBLE_ELEMENTS)))); |
| Handle<Map> fast_map( |
| Map::cast(native_context()->get(Context::ArrayMapIndex(HOLEY_ELEMENTS)))); |
| effect = graph()->NewNode( |
| simplified()->TransitionAndStoreElement(double_map, fast_map), a, k, |
| callback_value, effect, control); |
| |
| k = next_k; |
| |
| loop->ReplaceInput(1, control); |
| vloop->ReplaceInput(1, k); |
| eloop->ReplaceInput(1, effect); |
| |
| control = if_false; |
| effect = eloop; |
| |
| // The above %ThrowCalledNonCallable runtime call is an unconditional |
| // throw, making it impossible to return a successful completion in this |
| // case. We simply connect the successful completion to the graph end. |
| Node* terminate = |
| graph()->NewNode(common()->Throw(), check_throw, check_fail); |
| NodeProperties::MergeControlToEnd(graph(), common(), terminate); |
| |
| ReplaceWithValue(node, a, effect, control); |
| return Replace(a); |
| } |
| |
| Reduction JSCallReducer::ReduceCallApiFunction( |
| Node* node, Handle<FunctionTemplateInfo> function_template_info) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| int const argc = static_cast<int>(p.arity()) - 2; |
| Node* receiver = (p.convert_mode() == ConvertReceiverMode::kNullOrUndefined) |
| ? jsgraph()->HeapConstant(global_proxy()) |
| : NodeProperties::GetValueInput(node, 1); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| |
| // CallApiCallbackStub expects the target in a register, so we count it out, |
| // and counts the receiver as an implicit argument, so we count the receiver |
| // out too. |
| if (argc > CallApiCallbackStub::kArgMax) return NoChange(); |
| |
| // Infer the {receiver} maps, and check if we can inline the API function |
| // callback based on those. |
| ZoneHandleSet<Map> receiver_maps; |
| NodeProperties::InferReceiverMapsResult result = |
| NodeProperties::InferReceiverMaps(receiver, effect, &receiver_maps); |
| if (result == NodeProperties::kNoReceiverMaps) return NoChange(); |
| for (size_t i = 0; i < receiver_maps.size(); ++i) { |
| Handle<Map> receiver_map = receiver_maps[i]; |
| if (!receiver_map->IsJSObjectMap() || |
| (!function_template_info->accept_any_receiver() && |
| receiver_map->is_access_check_needed())) { |
| return NoChange(); |
| } |
| // In case of unreliable {receiver} information, the {receiver_maps} |
| // must all be stable in order to consume the information. |
| if (result == NodeProperties::kUnreliableReceiverMaps) { |
| if (!receiver_map->is_stable()) return NoChange(); |
| } |
| } |
| |
| // See if we can constant-fold the compatible receiver checks. |
| CallOptimization call_optimization(function_template_info); |
| if (!call_optimization.is_simple_api_call()) return NoChange(); |
| CallOptimization::HolderLookup lookup; |
| Handle<JSObject> api_holder = |
| call_optimization.LookupHolderOfExpectedType(receiver_maps[0], &lookup); |
| if (lookup == CallOptimization::kHolderNotFound) return NoChange(); |
| for (size_t i = 1; i < receiver_maps.size(); ++i) { |
| CallOptimization::HolderLookup lookupi; |
| Handle<JSObject> holder = call_optimization.LookupHolderOfExpectedType( |
| receiver_maps[i], &lookupi); |
| if (lookup != lookupi) return NoChange(); |
| if (!api_holder.is_identical_to(holder)) return NoChange(); |
| } |
| |
| // Install stability dependencies for unreliable {receiver_maps}. |
| if (result == NodeProperties::kUnreliableReceiverMaps) { |
| for (size_t i = 0; i < receiver_maps.size(); ++i) { |
| dependencies()->AssumeMapStable(receiver_maps[i]); |
| } |
| } |
| |
| // CallApiCallbackStub's register arguments: code, target, call data, holder, |
| // function address. |
| // TODO(turbofan): Consider introducing a JSCallApiCallback operator for |
| // this and lower it during JSGenericLowering, and unify this with the |
| // JSNativeContextSpecialization::InlineApiCall method a bit. |
| Handle<CallHandlerInfo> call_handler_info( |
| CallHandlerInfo::cast(function_template_info->call_code()), isolate()); |
| Handle<Object> data(call_handler_info->data(), isolate()); |
| CallApiCallbackStub stub(isolate(), argc, false); |
| CallInterfaceDescriptor cid = stub.GetCallInterfaceDescriptor(); |
| CallDescriptor* call_descriptor = Linkage::GetStubCallDescriptor( |
| isolate(), graph()->zone(), cid, |
| cid.GetStackParameterCount() + argc + |
| 2 /* implicit receiver + accessor_holder */, |
| CallDescriptor::kNeedsFrameState, Operator::kNoProperties, |
| MachineType::AnyTagged(), 1); |
| ApiFunction api_function(v8::ToCData<Address>(call_handler_info->callback())); |
| Node* holder = lookup == CallOptimization::kHolderFound |
| ? jsgraph()->HeapConstant(api_holder) |
| : receiver; |
| ExternalReference function_reference( |
| &api_function, ExternalReference::DIRECT_API_CALL, isolate()); |
| node->InsertInput(graph()->zone(), 0, |
| jsgraph()->HeapConstant(stub.GetCode())); |
| node->InsertInput(graph()->zone(), 2, jsgraph()->Constant(data)); |
| node->InsertInput(graph()->zone(), 3, holder); |
| node->InsertInput(graph()->zone(), 4, |
| jsgraph()->ExternalConstant(function_reference)); |
| node->InsertInput(graph()->zone(), 5, holder /* as accessor_holder */); |
| node->ReplaceInput(6, receiver); |
| NodeProperties::ChangeOp(node, common()->Call(call_descriptor)); |
| return Changed(node); |
| } |
| |
| namespace { |
| |
| // Check whether elements aren't mutated; we play it extremely safe here by |
| // explicitly checking that {node} is only used by {LoadField} or {LoadElement}. |
| bool IsSafeArgumentsElements(Node* node) { |
| for (Edge const edge : node->use_edges()) { |
| if (!NodeProperties::IsValueEdge(edge)) continue; |
| if (edge.from()->opcode() != IrOpcode::kLoadField && |
| edge.from()->opcode() != IrOpcode::kLoadElement) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } // namespace |
| |
| Reduction JSCallReducer::ReduceCallOrConstructWithArrayLikeOrSpread( |
| Node* node, int arity, CallFrequency const& frequency, |
| VectorSlotPair const& feedback) { |
| DCHECK(node->opcode() == IrOpcode::kJSCallWithArrayLike || |
| node->opcode() == IrOpcode::kJSCallWithSpread || |
| node->opcode() == IrOpcode::kJSConstructWithArrayLike || |
| node->opcode() == IrOpcode::kJSConstructWithSpread); |
| |
| // In case of a call/construct with spread, we need to |
| // ensure that it's safe to avoid the actual iteration. |
| if ((node->opcode() == IrOpcode::kJSCallWithSpread || |
| node->opcode() == IrOpcode::kJSConstructWithSpread) && |
| !isolate()->initial_array_iterator_prototype_map()->is_stable()) { |
| return NoChange(); |
| } |
| |
| // Check if {arguments_list} is an arguments object, and {node} is the only |
| // value user of {arguments_list} (except for value uses in frame states). |
| Node* arguments_list = NodeProperties::GetValueInput(node, arity); |
| if (arguments_list->opcode() != IrOpcode::kJSCreateArguments) { |
| return NoChange(); |
| } |
| for (Edge edge : arguments_list->use_edges()) { |
| if (!NodeProperties::IsValueEdge(edge)) continue; |
| Node* const user = edge.from(); |
| switch (user->opcode()) { |
| case IrOpcode::kCheckMaps: |
| case IrOpcode::kFrameState: |
| case IrOpcode::kStateValues: |
| case IrOpcode::kReferenceEqual: |
| case IrOpcode::kReturn: |
| // Ignore safe uses that definitely don't mess with the arguments. |
| continue; |
| case IrOpcode::kLoadField: { |
| DCHECK_EQ(arguments_list, user->InputAt(0)); |
| FieldAccess const& access = FieldAccessOf(user->op()); |
| if (access.offset == JSArray::kLengthOffset) { |
| // Ignore uses for arguments#length. |
| STATIC_ASSERT(JSArray::kLengthOffset == |
| JSArgumentsObject::kLengthOffset); |
| continue; |
| } else if (access.offset == JSObject::kElementsOffset) { |
| // Ignore safe uses for arguments#elements. |
| if (IsSafeArgumentsElements(user)) continue; |
| } |
| break; |
| } |
| case IrOpcode::kJSCallWithArrayLike: |
| // Ignore uses as argumentsList input to calls with array like. |
| if (user->InputAt(2) == arguments_list) continue; |
| break; |
| case IrOpcode::kJSConstructWithArrayLike: |
| // Ignore uses as argumentsList input to calls with array like. |
| if (user->InputAt(1) == arguments_list) continue; |
| break; |
| case IrOpcode::kJSCallWithSpread: { |
| // Ignore uses as spread input to calls with spread. |
| CallParameters p = CallParametersOf(user->op()); |
| int const arity = static_cast<int>(p.arity() - 1); |
| if (user->InputAt(arity) == arguments_list) continue; |
| break; |
| } |
| case IrOpcode::kJSConstructWithSpread: { |
| // Ignore uses as spread input to construct with spread. |
| ConstructParameters p = ConstructParametersOf(user->op()); |
| int const arity = static_cast<int>(p.arity() - 2); |
| if (user->InputAt(arity) == arguments_list) continue; |
| break; |
| } |
| default: |
| break; |
| } |
| // We cannot currently reduce the {node} to something better than what |
| // it already is, but we might be able to do something about the {node} |
| // later, so put it on the waitlist and try again during finalization. |
| waitlist_.insert(node); |
| return NoChange(); |
| } |
| |
| // Get to the actual frame state from which to extract the arguments; |
| // we can only optimize this in case the {node} was already inlined into |
| // some other function (and same for the {arguments_list}). |
| CreateArgumentsType const type = CreateArgumentsTypeOf(arguments_list->op()); |
| Node* frame_state = NodeProperties::GetFrameStateInput(arguments_list); |
| FrameStateInfo state_info = OpParameter<FrameStateInfo>(frame_state); |
| int start_index = 0; |
| // Determine the formal parameter count; |
| Handle<SharedFunctionInfo> shared; |
| if (!state_info.shared_info().ToHandle(&shared)) return NoChange(); |
| int formal_parameter_count = shared->internal_formal_parameter_count(); |
| if (type == CreateArgumentsType::kMappedArguments) { |
| // Mapped arguments (sloppy mode) that are aliased can only be handled |
| // here if there's no side-effect between the {node} and the {arg_array}. |
| // TODO(turbofan): Further relax this constraint. |
| if (formal_parameter_count != 0) { |
| Node* effect = NodeProperties::GetEffectInput(node); |
| if (!NodeProperties::NoObservableSideEffectBetween(effect, |
| arguments_list)) { |
| return NoChange(); |
| } |
| } |
| } else if (type == CreateArgumentsType::kRestParameter) { |
| start_index = formal_parameter_count; |
| |
| // For spread calls/constructs with rest parameters we need to ensure that |
| // the array iterator protector is intact, which guards that the rest |
| // parameter iteration is not observable. |
| if (node->opcode() == IrOpcode::kJSCallWithSpread || |
| node->opcode() == IrOpcode::kJSConstructWithSpread) { |
| if (!isolate()->IsArrayIteratorLookupChainIntact()) return NoChange(); |
| dependencies()->AssumePropertyCell(factory()->array_iterator_protector()); |
| } |
| } |
| |
| // For call/construct with spread, we need to also install a code |
| // dependency on the initial %ArrayIteratorPrototype% map here to |
| // ensure that no one messes with the next method. |
| if (node->opcode() == IrOpcode::kJSCallWithSpread || |
| node->opcode() == IrOpcode::kJSConstructWithSpread) { |
| dependencies()->AssumeMapStable( |
| isolate()->initial_array_iterator_prototype_map()); |
| } |
| |
| // Remove the {arguments_list} input from the {node}. |
| node->RemoveInput(arity--); |
| // Check if are spreading to inlined arguments or to the arguments of |
| // the outermost function. |
| Node* outer_state = frame_state->InputAt(kFrameStateOuterStateInput); |
| if (outer_state->opcode() != IrOpcode::kFrameState) { |
| Operator const* op = |
| (node->opcode() == IrOpcode::kJSCallWithArrayLike || |
| node->opcode() == IrOpcode::kJSCallWithSpread) |
| ? javascript()->CallForwardVarargs(arity + 1, start_index) |
| : javascript()->ConstructForwardVarargs(arity + 2, start_index); |
| NodeProperties::ChangeOp(node, op); |
| return Changed(node); |
| } |
| // Get to the actual frame state from which to extract the arguments; |
| // we can only optimize this in case the {node} was already inlined into |
| // some other function (and same for the {arg_array}). |
| FrameStateInfo outer_info = OpParameter<FrameStateInfo>(outer_state); |
| if (outer_info.type() == FrameStateType::kArgumentsAdaptor) { |
| // Need to take the parameters from the arguments adaptor. |
| frame_state = outer_state; |
| } |
| // Add the actual parameters to the {node}, skipping the receiver. |
| Node* const parameters = frame_state->InputAt(kFrameStateParametersInput); |
| for (int i = start_index + 1; i < parameters->InputCount(); ++i) { |
| node->InsertInput(graph()->zone(), static_cast<int>(++arity), |
| parameters->InputAt(i)); |
| } |
| |
| if (node->opcode() == IrOpcode::kJSCallWithArrayLike || |
| node->opcode() == IrOpcode::kJSCallWithSpread) { |
| NodeProperties::ChangeOp( |
| node, javascript()->Call(arity + 1, frequency, feedback)); |
| Reduction const reduction = ReduceJSCall(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } else { |
| NodeProperties::ChangeOp( |
| node, javascript()->Construct(arity + 2, frequency, feedback)); |
| Reduction const reduction = ReduceJSConstruct(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| } |
| |
| namespace { |
| |
| bool ShouldUseCallICFeedback(Node* node) { |
| HeapObjectMatcher m(node); |
| if (m.HasValue() || m.IsJSCreateClosure()) { |
| // Don't use CallIC feedback when we know the function |
| // being called, i.e. either know the closure itself or |
| // at least the SharedFunctionInfo. |
| return false; |
| } else if (m.IsPhi()) { |
| // Protect against endless loops here. |
| Node* control = NodeProperties::GetControlInput(node); |
| if (control->opcode() == IrOpcode::kLoop) return false; |
| // Check if {node} is a Phi of nodes which shouldn't |
| // use CallIC feedback (not looking through loops). |
| int const value_input_count = m.node()->op()->ValueInputCount(); |
| for (int n = 0; n < value_input_count; ++n) { |
| if (ShouldUseCallICFeedback(node->InputAt(n))) return true; |
| } |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace |
| |
| Reduction JSCallReducer::ReduceJSCall(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| Node* target = NodeProperties::GetValueInput(node, 0); |
| Node* control = NodeProperties::GetControlInput(node); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| |
| // Try to specialize JSCall {node}s with constant {target}s. |
| HeapObjectMatcher m(target); |
| if (m.HasValue()) { |
| if (m.Value()->IsJSFunction()) { |
| Handle<JSFunction> function = Handle<JSFunction>::cast(m.Value()); |
| Handle<SharedFunctionInfo> shared(function->shared(), isolate()); |
| |
| // Raise a TypeError if the {target} is a "classConstructor". |
| if (IsClassConstructor(shared->kind())) { |
| NodeProperties::ReplaceValueInputs(node, target); |
| NodeProperties::ChangeOp( |
| node, javascript()->CallRuntime( |
| Runtime::kThrowConstructorNonCallableError, 1)); |
| return Changed(node); |
| } |
| |
| // Don't inline cross native context. |
| if (function->native_context() != *native_context()) return NoChange(); |
| |
| // Check for known builtin functions. |
| switch (shared->code()->builtin_index()) { |
| case Builtins::kArrayConstructor: |
| return ReduceArrayConstructor(node); |
| case Builtins::kBooleanConstructor: |
| return ReduceBooleanConstructor(node); |
| case Builtins::kFunctionPrototypeApply: |
| return ReduceFunctionPrototypeApply(node); |
| case Builtins::kFunctionPrototypeCall: |
| return ReduceFunctionPrototypeCall(node); |
| case Builtins::kFunctionPrototypeHasInstance: |
| return ReduceFunctionPrototypeHasInstance(node); |
| case Builtins::kNumberConstructor: |
| return ReduceNumberConstructor(node); |
| case Builtins::kObjectConstructor: |
| return ReduceObjectConstructor(node); |
| case Builtins::kObjectGetPrototypeOf: |
| return ReduceObjectGetPrototypeOf(node); |
| case Builtins::kObjectPrototypeGetProto: |
| return ReduceObjectPrototypeGetProto(node); |
| case Builtins::kObjectPrototypeHasOwnProperty: |
| return ReduceObjectPrototypeHasOwnProperty(node); |
| case Builtins::kObjectPrototypeIsPrototypeOf: |
| return ReduceObjectPrototypeIsPrototypeOf(node); |
| case Builtins::kReflectApply: |
| return ReduceReflectApply(node); |
| case Builtins::kReflectConstruct: |
| return ReduceReflectConstruct(node); |
| case Builtins::kReflectGetPrototypeOf: |
| return ReduceReflectGetPrototypeOf(node); |
| case Builtins::kArrayForEach: |
| return ReduceArrayForEach(function, node); |
| case Builtins::kArrayMap: |
| return ReduceArrayMap(function, node); |
| case Builtins::kReturnReceiver: |
| return ReduceReturnReceiver(node); |
| default: |
| break; |
| } |
| |
| if (!FLAG_runtime_stats && shared->IsApiFunction()) { |
| Handle<FunctionTemplateInfo> function_template_info( |
| FunctionTemplateInfo::cast(shared->function_data()), isolate()); |
| return ReduceCallApiFunction(node, function_template_info); |
| } |
| } else if (m.Value()->IsJSBoundFunction()) { |
| Handle<JSBoundFunction> function = |
| Handle<JSBoundFunction>::cast(m.Value()); |
| Handle<JSReceiver> bound_target_function( |
| function->bound_target_function(), isolate()); |
| Handle<Object> bound_this(function->bound_this(), isolate()); |
| Handle<FixedArray> bound_arguments(function->bound_arguments(), |
| isolate()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| ConvertReceiverMode const convert_mode = |
| (bound_this->IsNullOrUndefined(isolate())) |
| ? ConvertReceiverMode::kNullOrUndefined |
| : ConvertReceiverMode::kNotNullOrUndefined; |
| size_t arity = p.arity(); |
| DCHECK_LE(2u, arity); |
| // Patch {node} to use [[BoundTargetFunction]] and [[BoundThis]]. |
| NodeProperties::ReplaceValueInput( |
| node, jsgraph()->Constant(bound_target_function), 0); |
| NodeProperties::ReplaceValueInput(node, jsgraph()->Constant(bound_this), |
| 1); |
| // Insert the [[BoundArguments]] for {node}. |
| for (int i = 0; i < bound_arguments->length(); ++i) { |
| node->InsertInput( |
| graph()->zone(), i + 2, |
| jsgraph()->Constant(handle(bound_arguments->get(i), isolate()))); |
| arity++; |
| } |
| NodeProperties::ChangeOp( |
| node, javascript()->Call(arity, p.frequency(), VectorSlotPair(), |
| convert_mode)); |
| // Try to further reduce the JSCall {node}. |
| Reduction const reduction = ReduceJSCall(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| |
| // Don't mess with other {node}s that have a constant {target}. |
| // TODO(bmeurer): Also support proxies here. |
| return NoChange(); |
| } |
| |
| // Extract feedback from the {node} using the CallICNexus. |
| if (!p.feedback().IsValid()) return NoChange(); |
| CallICNexus nexus(p.feedback().vector(), p.feedback().slot()); |
| if (nexus.IsUninitialized()) { |
| if (flags() & kBailoutOnUninitialized) { |
| // Introduce a SOFT deopt if the call {node} wasn't executed so far. |
| return ReduceSoftDeoptimize( |
| node, DeoptimizeReason::kInsufficientTypeFeedbackForCall); |
| } |
| return NoChange(); |
| } |
| |
| Handle<Object> feedback(nexus.GetFeedback(), isolate()); |
| if (feedback->IsWeakCell()) { |
| // Check if we want to use CallIC feedback here. |
| if (!ShouldUseCallICFeedback(target)) return NoChange(); |
| |
| Handle<WeakCell> cell = Handle<WeakCell>::cast(feedback); |
| if (cell->value()->IsJSFunction()) { |
| Node* target_function = |
| jsgraph()->Constant(handle(cell->value(), isolate())); |
| |
| // Check that the {target} is still the {target_function}. |
| Node* check = graph()->NewNode(simplified()->ReferenceEqual(), target, |
| target_function); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check, effect, control); |
| |
| // Specialize the JSCall node to the {target_function}. |
| NodeProperties::ReplaceValueInput(node, target_function, 0); |
| NodeProperties::ReplaceEffectInput(node, effect); |
| |
| // Try to further reduce the JSCall {node}. |
| Reduction const reduction = ReduceJSCall(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| } |
| return NoChange(); |
| } |
| |
| Reduction JSCallReducer::ReduceJSCallWithArrayLike(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCallWithArrayLike, node->opcode()); |
| CallFrequency frequency = CallFrequencyOf(node->op()); |
| VectorSlotPair feedback; |
| return ReduceCallOrConstructWithArrayLikeOrSpread(node, 2, frequency, |
| feedback); |
| } |
| |
| Reduction JSCallReducer::ReduceJSCallWithSpread(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCallWithSpread, node->opcode()); |
| CallParameters const& p = CallParametersOf(node->op()); |
| DCHECK_LE(3u, p.arity()); |
| int arity = static_cast<int>(p.arity() - 1); |
| CallFrequency frequency = p.frequency(); |
| VectorSlotPair feedback = p.feedback(); |
| return ReduceCallOrConstructWithArrayLikeOrSpread(node, arity, frequency, |
| feedback); |
| } |
| |
| Reduction JSCallReducer::ReduceJSConstruct(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSConstruct, node->opcode()); |
| ConstructParameters const& p = ConstructParametersOf(node->op()); |
| DCHECK_LE(2u, p.arity()); |
| int const arity = static_cast<int>(p.arity() - 2); |
| Node* target = NodeProperties::GetValueInput(node, 0); |
| Node* new_target = NodeProperties::GetValueInput(node, arity + 1); |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| |
| // Extract feedback from the {node} using the CallICNexus. |
| if (p.feedback().IsValid()) { |
| CallICNexus nexus(p.feedback().vector(), p.feedback().slot()); |
| if (nexus.IsUninitialized()) { |
| if (flags() & kBailoutOnUninitialized) { |
| // Introduce a SOFT deopt if the construct {node} wasn't executed so |
| // far. |
| return ReduceSoftDeoptimize( |
| node, DeoptimizeReason::kInsufficientTypeFeedbackForConstruct); |
| } |
| return NoChange(); |
| } |
| |
| Handle<Object> feedback(nexus.GetFeedback(), isolate()); |
| if (feedback->IsAllocationSite()) { |
| // The feedback is an AllocationSite, which means we have called the |
| // Array function and collected transition (and pretenuring) feedback |
| // for the resulting arrays. This has to be kept in sync with the |
| // implementation in Ignition. |
| Handle<AllocationSite> site = Handle<AllocationSite>::cast(feedback); |
| |
| // Retrieve the Array function from the {node}. |
| Node* array_function = jsgraph()->HeapConstant( |
| handle(native_context()->array_function(), isolate())); |
| |
| // Check that the {target} is still the {array_function}. |
| Node* check = graph()->NewNode(simplified()->ReferenceEqual(), target, |
| array_function); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check, effect, control); |
| |
| // Turn the {node} into a {JSCreateArray} call. |
| NodeProperties::ReplaceEffectInput(node, effect); |
| for (int i = arity; i > 0; --i) { |
| NodeProperties::ReplaceValueInput( |
| node, NodeProperties::GetValueInput(node, i), i + 1); |
| } |
| NodeProperties::ReplaceValueInput(node, array_function, 1); |
| NodeProperties::ChangeOp(node, javascript()->CreateArray(arity, site)); |
| return Changed(node); |
| } else if (feedback->IsWeakCell() && |
| !HeapObjectMatcher(new_target).HasValue()) { |
| Handle<WeakCell> cell = Handle<WeakCell>::cast(feedback); |
| if (cell->value()->IsConstructor()) { |
| Node* new_target_feedback = |
| jsgraph()->Constant(handle(cell->value(), isolate())); |
| |
| // Check that the {new_target} is still the {new_target_feedback}. |
| Node* check = graph()->NewNode(simplified()->ReferenceEqual(), |
| new_target, new_target_feedback); |
| effect = |
| graph()->NewNode(simplified()->CheckIf(), check, effect, control); |
| |
| // Specialize the JSConstruct node to the {new_target_feedback}. |
| NodeProperties::ReplaceValueInput(node, new_target_feedback, arity + 1); |
| NodeProperties::ReplaceEffectInput(node, effect); |
| if (target == new_target) { |
| NodeProperties::ReplaceValueInput(node, new_target_feedback, 0); |
| } |
| |
| // Try to further reduce the JSConstruct {node}. |
| Reduction const reduction = ReduceJSConstruct(node); |
| return reduction.Changed() ? reduction : Changed(node); |
| } |
| } |
| } |
| |
| // Try to specialize JSConstruct {node}s with constant {target}s. |
| HeapObjectMatcher m(target); |
| if (m.HasValue()) { |
| if (m.Value()->IsJSFunction()) { |
| Handle<JSFunction> function = Handle<JSFunction>::cast(m.Value()); |
| |
| // Raise a TypeError if the {target} is not a constructor. |
| if (!function->IsConstructor()) { |
| NodeProperties::ReplaceValueInputs(node, target); |
| NodeProperties::ChangeOp( |
| node, javascript()->CallRuntime( |
| Runtime::kThrowConstructedNonConstructable)); |
| return Changed(node); |
| } |
| |
| // Don't inline cross native context. |
| if (function->native_context() != *native_context()) return NoChange(); |
| |
| // Check for the ArrayConstructor. |
| if (*function == function->native_context()->array_function()) { |
| // TODO(bmeurer): Deal with Array subclasses here. |
| Handle<AllocationSite> site; |
| // Turn the {node} into a {JSCreateArray} call. |
| for (int i = arity; i > 0; --i) { |
| NodeProperties::ReplaceValueInput( |
| node, NodeProperties::GetValueInput(node, i), i + 1); |
| } |
| NodeProperties::ReplaceValueInput(node, new_target, 1); |
| NodeProperties::ChangeOp(node, javascript()->CreateArray(arity, site)); |
| return Changed(node); |
| } |
| |
| // Check for the ObjectConstructor. |
| if (*function == function->native_context()->object_function()) { |
| // If no value is passed, we can immediately lower to a simple |
| // JSCreate and don't need to do any massaging of the {node}. |
| if (arity == 0) { |
| NodeProperties::ChangeOp(node, javascript()->Create()); |
| return Changed(node); |
| } |
| |
| // Otherwise we can only lower to JSCreate if we know that |
| // the value parameter is ignored, which is only the case if |
| // the {new_target} and {target} are definitely not identical. |
| HeapObjectMatcher mnew_target(new_target); |
| if (mnew_target.HasValue() && *mnew_target.Value() != *function) { |
| // Drop the value inputs. |
| for (int i = arity; i > 0; --i) node->RemoveInput(i); |
| NodeProperties::ChangeOp(node, javascript()->Create()); |
| return Changed(node); |
| } |
| } |
| } |
| |
| // TODO(bmeurer): Also support optimizing bound functions and proxies here. |
| } |
| |
| return NoChange(); |
| } |
| |
| Reduction JSCallReducer::ReduceJSConstructWithArrayLike(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSConstructWithArrayLike, node->opcode()); |
| CallFrequency frequency = CallFrequencyOf(node->op()); |
| VectorSlotPair feedback; |
| return ReduceCallOrConstructWithArrayLikeOrSpread(node, 1, frequency, |
| feedback); |
| } |
| |
| Reduction JSCallReducer::ReduceJSConstructWithSpread(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSConstructWithSpread, node->opcode()); |
| ConstructParameters const& p = ConstructParametersOf(node->op()); |
| DCHECK_LE(3u, p.arity()); |
| int arity = static_cast<int>(p.arity() - 2); |
| CallFrequency frequency = p.frequency(); |
| VectorSlotPair feedback = p.feedback(); |
| return ReduceCallOrConstructWithArrayLikeOrSpread(node, arity, frequency, |
| feedback); |
| } |
| |
| Reduction JSCallReducer::ReduceReturnReceiver(Node* node) { |
| DCHECK_EQ(IrOpcode::kJSCall, node->opcode()); |
| Node* receiver = NodeProperties::GetValueInput(node, 1); |
| ReplaceWithValue(node, receiver); |
| return Replace(receiver); |
| } |
| |
| Reduction JSCallReducer::ReduceSoftDeoptimize(Node* node, |
| DeoptimizeReason reason) { |
| Node* effect = NodeProperties::GetEffectInput(node); |
| Node* control = NodeProperties::GetControlInput(node); |
| Node* frame_state = NodeProperties::FindFrameStateBefore(node); |
| Node* deoptimize = |
| graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kSoft, reason), |
| frame_state, effect, control); |
| // TODO(bmeurer): This should be on the AdvancedReducer somehow. |
| NodeProperties::MergeControlToEnd(graph(), common(), deoptimize); |
| Revisit(graph()->end()); |
| node->TrimInputCount(0); |
| NodeProperties::ChangeOp(node, common()->Dead()); |
| return Changed(node); |
| } |
| |
| Graph* JSCallReducer::graph() const { return jsgraph()->graph(); } |
| |
| Isolate* JSCallReducer::isolate() const { return jsgraph()->isolate(); } |
| |
| Factory* JSCallReducer::factory() const { return isolate()->factory(); } |
| |
| Handle<JSGlobalProxy> JSCallReducer::global_proxy() const { |
| return handle(JSGlobalProxy::cast(native_context()->global_proxy()), |
| isolate()); |
| } |
| |
| CommonOperatorBuilder* JSCallReducer::common() const { |
| return jsgraph()->common(); |
| } |
| |
| JSOperatorBuilder* JSCallReducer::javascript() const { |
| return jsgraph()->javascript(); |
| } |
| |
| SimplifiedOperatorBuilder* JSCallReducer::simplified() const { |
| return jsgraph()->simplified(); |
| } |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |