| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library type_graph_inferrer; |
| |
| import 'dart:collection' show Queue, LinkedHashSet, IterableBase, HashMap; |
| import '../dart_types.dart' show DartType, InterfaceType, TypeKind; |
| import '../elements/elements.dart'; |
| import '../tree/tree.dart' show Node; |
| import '../types/types.dart' show TypeMask, ContainerTypeMask, TypesInferrer; |
| import '../universe/universe.dart' show Selector, TypedSelector, SideEffects; |
| import '../dart2jslib.dart' show Compiler, SourceString, TreeElementMapping; |
| import 'inferrer_visitor.dart' show TypeSystem, ArgumentsTypes; |
| import '../native_handler.dart' as native; |
| import '../util/util.dart' show Spannable; |
| import 'simple_types_inferrer.dart'; |
| import '../dart2jslib.dart' show invariant; |
| |
| part 'type_graph_nodes.dart'; |
| |
| /** |
| * A set of selector names that [List] implements, that we know return |
| * their element type. |
| */ |
| Set<String> returnsElementTypeSet = new Set<String>.from( |
| const <String>[ |
| 'first', |
| 'last', |
| 'single', |
| 'singleWhere', |
| 'elementAt', |
| '[]', |
| 'removeAt', |
| 'removeLast' |
| ]); |
| |
| bool returnsElementType(Selector selector) { |
| return (selector.mask != null) |
| && selector.mask.isContainer |
| && returnsElementTypeSet.contains(selector.name.slowToString()); |
| } |
| |
| class TypeInformationSystem extends TypeSystem<TypeInformation> { |
| final Compiler compiler; |
| |
| /// [ElementTypeInformation]s for elements. |
| final Map<Element, TypeInformation> typeInformations = |
| new Map<Element, TypeInformation>(); |
| |
| /// [ContainerTypeInformation] for allocated containers. |
| final Map<Node, TypeInformation> allocatedContainers = |
| new Map<Node, TypeInformation>(); |
| |
| /// Cache of [ConcreteTypeInformation]. |
| final Map<TypeMask, TypeInformation> concreteTypes = |
| new Map<TypeMask, TypeInformation>(); |
| |
| /// List of [TypeInformation]s allocated inside method bodies (calls, |
| /// narrowing, phis, and containers). |
| final List<TypeInformation> allocatedTypes = <TypeInformation>[]; |
| |
| TypeInformationSystem(this.compiler) { |
| nonNullEmptyType = getConcreteTypeFor(const TypeMask.nonNullEmpty()); |
| } |
| |
| TypeInformation nullTypeCache; |
| TypeInformation get nullType { |
| if (nullTypeCache != null) return nullTypeCache; |
| return nullTypeCache = getConcreteTypeFor(compiler.typesTask.nullType); |
| } |
| |
| TypeInformation intTypeCache; |
| TypeInformation get intType { |
| if (intTypeCache != null) return intTypeCache; |
| return intTypeCache = getConcreteTypeFor(compiler.typesTask.intType); |
| } |
| |
| TypeInformation doubleTypeCache; |
| TypeInformation get doubleType { |
| if (doubleTypeCache != null) return doubleTypeCache; |
| return doubleTypeCache = getConcreteTypeFor(compiler.typesTask.doubleType); |
| } |
| |
| TypeInformation numTypeCache; |
| TypeInformation get numType { |
| if (numTypeCache != null) return numTypeCache; |
| return numTypeCache = getConcreteTypeFor(compiler.typesTask.numType); |
| } |
| |
| TypeInformation boolTypeCache; |
| TypeInformation get boolType { |
| if (boolTypeCache != null) return boolTypeCache; |
| return boolTypeCache = getConcreteTypeFor(compiler.typesTask.boolType); |
| } |
| |
| TypeInformation functionTypeCache; |
| TypeInformation get functionType { |
| if (functionTypeCache != null) return functionTypeCache; |
| return functionTypeCache = |
| getConcreteTypeFor(compiler.typesTask.functionType); |
| } |
| |
| TypeInformation listTypeCache; |
| TypeInformation get listType { |
| if (listTypeCache != null) return listTypeCache; |
| return listTypeCache = getConcreteTypeFor(compiler.typesTask.listType); |
| } |
| |
| TypeInformation constListTypeCache; |
| TypeInformation get constListType { |
| if (constListTypeCache != null) return constListTypeCache; |
| return constListTypeCache = |
| getConcreteTypeFor(compiler.typesTask.constListType); |
| } |
| |
| TypeInformation fixedListTypeCache; |
| TypeInformation get fixedListType { |
| if (fixedListTypeCache != null) return fixedListTypeCache; |
| return fixedListTypeCache = |
| getConcreteTypeFor(compiler.typesTask.fixedListType); |
| } |
| |
| TypeInformation growableListTypeCache; |
| TypeInformation get growableListType { |
| if (growableListTypeCache != null) return growableListTypeCache; |
| return growableListTypeCache = |
| getConcreteTypeFor(compiler.typesTask.growableListType); |
| } |
| |
| TypeInformation mapTypeCache; |
| TypeInformation get mapType { |
| if (mapTypeCache != null) return mapTypeCache; |
| return mapTypeCache = getConcreteTypeFor(compiler.typesTask.mapType); |
| } |
| |
| TypeInformation constMapTypeCache; |
| TypeInformation get constMapType { |
| if (constMapTypeCache != null) return constMapTypeCache; |
| return constMapTypeCache = |
| getConcreteTypeFor(compiler.typesTask.constMapType); |
| } |
| |
| TypeInformation stringTypeCache; |
| TypeInformation get stringType { |
| if (stringTypeCache != null) return stringTypeCache; |
| return stringTypeCache = getConcreteTypeFor(compiler.typesTask.stringType); |
| } |
| |
| TypeInformation typeTypeCache; |
| TypeInformation get typeType { |
| if (typeTypeCache != null) return typeTypeCache; |
| return typeTypeCache = getConcreteTypeFor(compiler.typesTask.typeType); |
| } |
| |
| TypeInformation dynamicTypeCache; |
| TypeInformation get dynamicType { |
| if (dynamicTypeCache != null) return dynamicTypeCache; |
| return dynamicTypeCache = |
| getConcreteTypeFor(compiler.typesTask.dynamicType); |
| } |
| |
| TypeInformation nonNullEmptyType; |
| |
| TypeInformation computeLUB(TypeInformation firstType, |
| TypeInformation secondType) { |
| if (firstType == null) return secondType; |
| if (firstType == secondType) return firstType; |
| if (firstType == nonNullEmptyType) return secondType; |
| if (secondType == nonNullEmptyType) return firstType; |
| if (firstType == dynamicType || secondType == dynamicType) { |
| return dynamicType; |
| } |
| return getConcreteTypeFor( |
| firstType.type.union(secondType.type, compiler)); |
| } |
| |
| TypeInformation refineReceiver(Selector selector, TypeInformation receiver) { |
| if (receiver.type.isExact) return receiver; |
| TypeMask otherType = compiler.world.allFunctions.receiverType(selector); |
| // If this is refining to nullable subtype of `Object` just return |
| // the receiver. We know the narrowing is useless. |
| if (otherType.isNullable && otherType.containsAll(compiler)) { |
| return receiver; |
| } |
| TypeInformation newType = new NarrowTypeInformation(receiver, otherType); |
| allocatedTypes.add(newType); |
| return newType; |
| } |
| |
| TypeInformation narrowType(TypeInformation type, |
| DartType annotation, |
| {bool isNullable: true}) { |
| if (annotation.treatAsDynamic) return type; |
| if (annotation.isVoid) return nullType; |
| if (annotation.element == compiler.objectClass) return type; |
| TypeMask otherType; |
| if (annotation.kind == TypeKind.TYPEDEF |
| || annotation.kind == TypeKind.FUNCTION) { |
| otherType = functionType.type; |
| } else if (annotation.kind == TypeKind.TYPE_VARIABLE) { |
| // TODO(ngeoffray): Narrow to bound. |
| return type; |
| } else { |
| assert(annotation.kind == TypeKind.INTERFACE); |
| otherType = new TypeMask.nonNullSubtype(annotation); |
| } |
| if (isNullable) otherType = otherType.nullable(); |
| if (type.type.isExact) { |
| return type; |
| } else { |
| TypeInformation newType = new NarrowTypeInformation(type, otherType); |
| allocatedTypes.add(newType); |
| return newType; |
| } |
| } |
| |
| ElementTypeInformation getInferredTypeOf(Element element) { |
| element = element.implementation; |
| return typeInformations.putIfAbsent(element, () { |
| return new ElementTypeInformation(element); |
| }); |
| } |
| |
| ConcreteTypeInformation getConcreteTypeFor(TypeMask mask) { |
| return concreteTypes.putIfAbsent(mask, () { |
| return new ConcreteTypeInformation(mask); |
| }); |
| } |
| |
| TypeInformation nonNullSubtype(DartType type) { |
| return getConcreteTypeFor(new TypeMask.nonNullSubtype(type)); |
| } |
| |
| TypeInformation nonNullSubclass(DartType type) { |
| return getConcreteTypeFor(new TypeMask.nonNullSubclass(type)); |
| } |
| |
| TypeInformation nonNullExact(DartType type) { |
| return getConcreteTypeFor(new TypeMask.nonNullExact(type)); |
| } |
| |
| TypeInformation nonNullEmpty() { |
| return nonNullEmptyType; |
| } |
| |
| TypeInformation allocateContainer(TypeInformation type, |
| Node node, |
| Element enclosing, |
| [TypeInformation elementType, int length]) { |
| ContainerTypeMask mask = new ContainerTypeMask(type.type, node, enclosing); |
| mask.elementType = elementType == null ? null : elementType.type; |
| mask.length = length; |
| TypeInformation element = |
| new ElementInContainerTypeInformation(elementType, mask); |
| allocatedTypes.add(element); |
| return allocatedContainers[node] = |
| new ContainerTypeInformation(mask, element); |
| } |
| |
| Selector newTypedSelector(TypeInformation info, Selector selector) { |
| // Only type the selector if [info] is concrete, because the other |
| // kinds of [TypeInformation] have the empty type at this point of |
| // analysis. |
| return info.isConcrete |
| ? new TypedSelector(info.type, selector) |
| : selector; |
| } |
| |
| TypeInformation allocateDiamondPhi(TypeInformation firstInput, |
| TypeInformation secondInput) { |
| PhiElementTypeInformation result = |
| new PhiElementTypeInformation(null, false, null); |
| result.addAssignment(firstInput); |
| result.addAssignment(secondInput); |
| allocatedTypes.add(result); |
| return result; |
| } |
| |
| PhiElementTypeInformation allocatePhi(Node node, |
| Element element, |
| inputType) { |
| // Check if [inputType] is a phi for a local updated in |
| // the try/catch block [node]. If it is, no need to allocate a new |
| // phi. |
| if (inputType is PhiElementTypeInformation |
| && inputType.branchNode == node) { |
| return inputType; |
| } |
| PhiElementTypeInformation result = |
| new PhiElementTypeInformation(node, true, element); |
| allocatedTypes.add(result); |
| result.addAssignment(inputType); |
| return result; |
| } |
| |
| TypeInformation simplifyPhi(Node node, |
| Element element, |
| PhiElementTypeInformation phiType) { |
| if (phiType.assignments.length == 1) return phiType.assignments.first; |
| return phiType; |
| } |
| |
| PhiElementTypeInformation addPhiInput(Element element, |
| PhiElementTypeInformation phiType, |
| TypeInformation newType) { |
| phiType.addAssignment(newType); |
| return phiType; |
| } |
| |
| TypeMask computeTypeMask(Iterable<TypeInformation> assignments) { |
| TypeMask newType = const TypeMask.nonNullEmpty(); |
| for (var info in assignments) { |
| newType = newType.union(info.type, compiler); |
| } |
| return newType.containsAll(compiler) ? dynamicType.type : newType; |
| } |
| } |
| |
| /** |
| * A work queue for the inferrer. It filters out nodes on |
| * which we gave up on inferencing, as well as ensures through |
| * [TypeInformation.inQueue] that a node is in the queue only once at |
| * a time. |
| */ |
| class WorkQueue { |
| final Queue<TypeInformation> queue = new Queue<TypeInformation>(); |
| |
| void add(TypeInformation element) { |
| if (element.abandonInferencing) return; |
| if (element.inQueue) return; |
| queue.addLast(element); |
| element.inQueue = true; |
| } |
| |
| void addAll(Iterable<TypeInformation> all) { |
| all.forEach(add); |
| } |
| |
| TypeInformation remove() { |
| TypeInformation element = queue.removeFirst(); |
| element.inQueue = false; |
| return element; |
| } |
| |
| bool get isEmpty => queue.isEmpty; |
| |
| int get length => queue.length; |
| } |
| |
| /** |
| * An inferencing engine that computes a call graph of |
| * [TypeInformation] nodes by visiting the AST of the application, and |
| * then does the inferencing on the graph. |
| * |
| * The inferencing is currently done in three steps: |
| * |
| * 1) Compute the call graph. |
| * 2) Refine all nodes in a way that avoids cycles. |
| * 3) Refine all nodes. |
| * |
| */ |
| class TypeGraphInferrerEngine |
| extends InferrerEngine<TypeInformation, TypeInformationSystem> { |
| final Map<Element, TypeInformation> defaultTypeOfParameter = |
| new Map<Element, TypeInformation>(); |
| final List<CallSiteTypeInformation> allocatedCalls = |
| <CallSiteTypeInformation>[]; |
| final WorkQueue workQueue = new WorkQueue(); |
| |
| /// The maximum number of times we allow a node in the graph to |
| /// change types. If a node reaches that limit, we give up |
| /// inferencing on it and give it the dynamic type. |
| final int MAX_CHANGE_COUNT = 5; |
| |
| int overallRefineCount = 0; |
| |
| TypeGraphInferrerEngine(Compiler compiler) |
| : super(compiler, new TypeInformationSystem(compiler)); |
| |
| void runOverAllElements() { |
| if (compiler.disableTypeInference) return; |
| int addedInGraph = 0; |
| compiler.progress.reset(); |
| |
| sortResolvedElements().forEach((Element element) { |
| if (compiler.progress.elapsedMilliseconds > 500) { |
| compiler.log('Added $addedInGraph elements in inferencing graph.'); |
| compiler.progress.reset(); |
| } |
| // Force the creation of the [ElementTypeInformation] to ensure it is |
| // in the graph. |
| types.getInferredTypeOf(element); |
| |
| SimpleTypeInferrerVisitor visitor = |
| new SimpleTypeInferrerVisitor(element, compiler, this); |
| TypeInformation type; |
| compiler.withCurrentElement(element, () { |
| type = visitor.run(); |
| }); |
| addedInGraph++; |
| |
| if (element.isField()) { |
| Node node = element.parseNode(compiler); |
| if (element.modifiers.isFinal() || element.modifiers.isConst()) { |
| // If [element] is final and has an initializer, we record |
| // the inferred type. |
| if (node.asSendSet() != null) { |
| recordType(element, type); |
| } else if (!element.isInstanceMember()) { |
| recordType(element, types.nullType); |
| } |
| } else if (node.asSendSet() == null) { |
| // Only update types of static fields if there is no |
| // assignment. Instance fields are dealt with in the constructor. |
| if (Elements.isStaticOrTopLevelField(element)) { |
| recordTypeOfNonFinalField(node, element, type); |
| } |
| } else { |
| recordTypeOfNonFinalField(node, element, type); |
| } |
| if (Elements.isStaticOrTopLevelField(element) |
| && node.asSendSet() != null |
| && !element.modifiers.isConst()) { |
| var argument = node.asSendSet().arguments.head; |
| // TODO(13429): We could do better here by using the |
| // constant handler to figure out if it's a lazy field or not. |
| if (argument.asSend() != null |
| || (argument.asNewExpression() != null && !argument.isConst())) { |
| recordType(element, types.nullType); |
| } |
| } |
| } else { |
| recordReturnType(element, type); |
| } |
| }); |
| compiler.log('Added $addedInGraph elements in inferencing graph.'); |
| |
| buildWorkQueue(); |
| refine(); |
| |
| compiler.log('Inferred $overallRefineCount types.'); |
| |
| if (compiler.enableTypeAssertions) { |
| // Undo the narrowing of parameters types. Parameters are being |
| // checked by the method, and we can therefore only trust their |
| // type after the checks. It is okay for the inferrer to rely on |
| // the type annotations, but the backend should has to |
| // insert the checks. |
| types.typeInformations.forEach((Element element, |
| ElementTypeInformation info) { |
| if (element.isParameter() || element.isFieldParameter()) { |
| if (info.abandonInferencing) { |
| info.type = types.dynamicType.type; |
| } else { |
| info.type = types.computeTypeMask(info.assignments); |
| } |
| } |
| }); |
| } |
| |
| processLoopInformation(); |
| } |
| |
| void processLoopInformation() { |
| allocatedCalls.forEach((info) { |
| if (!info.inLoop) return; |
| if (info is StaticCallSiteTypeInformation) { |
| compiler.world.addFunctionCalledInLoop(info.calledElement); |
| } else if (info.selector.mask != null |
| && !info.selector.mask.containsAll(compiler)) { |
| // For instance methods, we only register a selector called in a |
| // loop if it is a typed selector, to avoid marking too many |
| // methods as being called from within a loop. This cuts down |
| // on the code bloat. |
| info.targets.forEach(compiler.world.addFunctionCalledInLoop); |
| } |
| }); |
| } |
| |
| void refine() { |
| while (!workQueue.isEmpty) { |
| if (compiler.progress.elapsedMilliseconds > 500) { |
| compiler.log('Inferred $overallRefineCount types.'); |
| compiler.progress.reset(); |
| } |
| TypeInformation info = workQueue.remove(); |
| TypeMask oldType = info.type; |
| TypeMask newType = info.refine(this); |
| if ((info.type = newType) != oldType) { |
| overallRefineCount++; |
| info.refineCount++; |
| if (info.refineCount > MAX_CHANGE_COUNT) { |
| info.giveUp(this); |
| } |
| workQueue.addAll(info.users); |
| } |
| } |
| } |
| |
| void buildWorkQueue() { |
| workQueue.addAll(types.typeInformations.values); |
| workQueue.addAll(types.allocatedTypes); |
| workQueue.addAll(allocatedCalls); |
| } |
| |
| /** |
| * Update the assignments to parameters in the graph. [remove] tells |
| * wheter assignments must be added or removed. If [init] is true, |
| * parameters are added to the work queue. |
| */ |
| void updateParameterAssignments(TypeInformation caller, |
| Element callee, |
| ArgumentsTypes arguments, |
| Selector selector, |
| {bool remove, bool init: false}) { |
| if (callee.name == Compiler.NO_SUCH_METHOD) return; |
| if (callee.isField()) { |
| if (selector.isSetter()) { |
| ElementTypeInformation info = types.getInferredTypeOf(callee); |
| if (remove) { |
| info.removeAssignment(arguments.positional[0]); |
| } else { |
| info.addAssignment(arguments.positional[0]); |
| } |
| if (!init) workQueue.add(info); |
| } |
| } else if (callee.isGetter()) { |
| return; |
| } else if (selector != null && selector.isGetter()) { |
| if (!remove) { |
| FunctionElement function = callee.implementation; |
| FunctionSignature signature = function.computeSignature(compiler); |
| signature.forEachParameter((Element parameter) { |
| ElementTypeInformation info = types.getInferredTypeOf(parameter); |
| info.giveUp(this); |
| if (!init) workQueue.addAll(info.users); |
| }); |
| } |
| } else { |
| FunctionElement function = callee.implementation; |
| FunctionSignature signature = function.computeSignature(compiler); |
| int parameterIndex = 0; |
| bool visitingRequiredParameter = true; |
| signature.forEachParameter((Element parameter) { |
| if (parameter == signature.firstOptionalParameter) { |
| visitingRequiredParameter = false; |
| } |
| TypeInformation type = visitingRequiredParameter |
| ? arguments.positional[parameterIndex] |
| : signature.optionalParametersAreNamed |
| ? arguments.named[parameter.name] |
| : parameterIndex < arguments.positional.length |
| ? arguments.positional[parameterIndex] |
| : null; |
| if (type == null) type = getDefaultTypeOfParameter(parameter); |
| TypeInformation info = types.getInferredTypeOf(parameter); |
| if (remove) { |
| info.removeAssignment(type); |
| } else { |
| info.addAssignment(type); |
| } |
| parameterIndex++; |
| if (!init) workQueue.add(info); |
| }); |
| } |
| } |
| |
| void setDefaultTypeOfParameter(Element parameter, TypeInformation type) { |
| assert(parameter.enclosingElement.isImplementation); |
| TypeInformation existing = defaultTypeOfParameter[parameter]; |
| defaultTypeOfParameter[parameter] = type; |
| TypeInformation info = types.getInferredTypeOf(parameter); |
| if (!info.abandonInferencing && existing != null && existing != type) { |
| // Replace references to [existing] to use [type] instead. |
| if (parameter.enclosingElement.isInstanceMember()) { |
| ParameterAssignments assignments = info.assignments; |
| int count = assignments.assignments[existing]; |
| if (count == null) return; |
| type.addUser(info); |
| assignments.assignments[type] = count; |
| assignments.assignments.remove(existing); |
| } else { |
| List<TypeInformation> assignments = info.assignments; |
| for (int i = 0; i < assignments.length; i++) { |
| if (assignments[i] == existing) { |
| info.assignments[i] = type; |
| type.addUser(info); |
| } |
| } |
| } |
| } |
| } |
| |
| TypeInformation getDefaultTypeOfParameter(Element parameter) { |
| return defaultTypeOfParameter.putIfAbsent(parameter, () { |
| return new ConcreteTypeInformation(types.dynamicType.type); |
| }); |
| } |
| |
| TypeInformation typeOfElement(Element element) { |
| if (element is FunctionElement) return types.functionType; |
| return types.getInferredTypeOf(element); |
| } |
| |
| TypeInformation returnTypeOfElement(Element element) { |
| if (element is !FunctionElement) return types.dynamicType; |
| return types.getInferredTypeOf(element); |
| } |
| |
| void recordTypeOfFinalField(Spannable node, |
| Element analyzed, |
| Element element, |
| TypeInformation type) { |
| types.getInferredTypeOf(element).addAssignment(type); |
| } |
| |
| void recordTypeOfNonFinalField(Spannable node, |
| Element element, |
| TypeInformation type) { |
| types.getInferredTypeOf(element).addAssignment(type); |
| } |
| |
| bool recordType(Element element, TypeInformation type) { |
| types.getInferredTypeOf(element).addAssignment(type); |
| return false; |
| } |
| |
| void recordReturnType(Element element, TypeInformation type) { |
| TypeInformation info = types.getInferredTypeOf(element); |
| if (element.name == const SourceString('==')) { |
| info.addAssignment(types.boolType); |
| } |
| // TODO(ngeoffray): Clean up. We do these checks because |
| // [SimpleTypesInferrer] deals with two different inferrers. |
| if (type == null) return; |
| if (info.assignments.isEmpty) info.addAssignment(type); |
| } |
| |
| TypeInformation addReturnTypeFor(Element element, |
| TypeInformation unused, |
| TypeInformation newType) { |
| TypeInformation type = types.getInferredTypeOf(element); |
| // TODO(ngeoffray): Clean up. We do this check because |
| // [SimpleTypesInferrer] deals with two different inferrers. |
| if (element.isGenerativeConstructor()) return type; |
| type.addAssignment(newType); |
| return type; |
| } |
| |
| TypeInformation registerCalledElement(Spannable node, |
| Selector selector, |
| Element caller, |
| Element callee, |
| ArgumentsTypes arguments, |
| SideEffects sideEffects, |
| bool inLoop) { |
| CallSiteTypeInformation info = new StaticCallSiteTypeInformation( |
| node, caller, callee, selector, arguments, inLoop); |
| info.addToGraph(this); |
| allocatedCalls.add(info); |
| updateSideEffects(sideEffects, selector, callee); |
| return info; |
| } |
| |
| TypeInformation registerCalledSelector(Node node, |
| Selector selector, |
| TypeInformation receiverType, |
| Element caller, |
| ArgumentsTypes arguments, |
| SideEffects sideEffects, |
| bool inLoop) { |
| if (selector.isClosureCall()) { |
| return registerCalledClosure( |
| node, selector, receiverType, caller, arguments, sideEffects, inLoop); |
| } |
| |
| compiler.world.allFunctions.filter(selector).forEach((callee) { |
| updateSideEffects(sideEffects, selector, callee); |
| }); |
| |
| CallSiteTypeInformation info = new DynamicCallSiteTypeInformation( |
| node, caller, selector, receiverType, arguments, inLoop); |
| |
| info.addToGraph(this); |
| allocatedCalls.add(info); |
| return info; |
| } |
| |
| TypeInformation registerCalledClosure(Node node, |
| Selector selector, |
| TypeInformation closure, |
| Element caller, |
| ArgumentsTypes arguments, |
| SideEffects sideEffects, |
| bool inLoop) { |
| sideEffects.setDependsOnSomething(); |
| sideEffects.setAllSideEffects(); |
| CallSiteTypeInformation info = new ClosureCallSiteTypeInformation( |
| node, caller, selector, closure, arguments, inLoop); |
| info.addToGraph(this); |
| allocatedCalls.add(info); |
| return info; |
| } |
| |
| // Sorts the resolved elements by size. We do this for this inferrer |
| // to get the same results for [ContainerTracer] compared to the |
| // [SimpleTypesInferrer]. |
| Iterable<Element> sortResolvedElements() { |
| int max = 0; |
| Map<int, Set<Element>> methodSizes = new Map<int, Set<Element>>(); |
| compiler.enqueuer.resolution.resolvedElements.forEach( |
| (Element element, TreeElementMapping mapping) { |
| element = element.implementation; |
| if (element.impliesType()) return; |
| assert(invariant(element, |
| element.isField() || |
| element.isFunction() || |
| element.isGenerativeConstructor() || |
| element.isGetter() || |
| element.isSetter(), |
| message: 'Unexpected element kind: ${element.kind}')); |
| // TODO(ngeoffray): Not sure why the resolver would put a null |
| // mapping. |
| if (mapping == null) return; |
| if (element.isAbstract(compiler)) return; |
| // Put the other operators in buckets by length, later to be added in |
| // length order. |
| int length = mapping.selectors.length; |
| max = length > max ? length : max; |
| Set<Element> set = methodSizes.putIfAbsent( |
| length, () => new LinkedHashSet<Element>()); |
| set.add(element); |
| }); |
| |
| List<Element> result = <Element>[]; |
| |
| for (int i = 0; i <= max; i++) { |
| Set<Element> set = methodSizes[i]; |
| if (set != null) { |
| result.addAll(set); |
| } |
| } |
| return result; |
| } |
| |
| void clear() { |
| allocatedCalls.clear(); |
| defaultTypeOfParameter.clear(); |
| types.typeInformations.values.forEach((info) => info.clear()); |
| types.allocatedTypes.clear(); |
| types.concreteTypes.clear(); |
| } |
| |
| Iterable<Element> getCallersOf(Element element) { |
| if (compiler.disableTypeInference) { |
| throw new UnsupportedError( |
| "Cannot query the type inferrer when type inference is disabled."); |
| } |
| return types.getInferredTypeOf(element).callers.keys; |
| } |
| |
| /** |
| * Returns the type of [element] when being called with [selector]. |
| */ |
| TypeInformation typeOfElementWithSelector(Element element, |
| Selector selector) { |
| if (element.name == Compiler.NO_SUCH_METHOD |
| && selector.name != element.name) { |
| // An invocation can resolve to a [noSuchMethod], in which case |
| // we get the return type of [noSuchMethod]. |
| return returnTypeOfElement(element); |
| } else if (selector.isGetter()) { |
| if (element.isFunction()) { |
| // [functionType] is null if the inferrer did not run. |
| return types.functionType == null |
| ? types.dynamicType |
| : types.functionType; |
| } else if (element.isField()) { |
| return typeOfElement(element); |
| } else if (Elements.isUnresolved(element)) { |
| return types.dynamicType; |
| } else { |
| assert(element.isGetter()); |
| return returnTypeOfElement(element); |
| } |
| } else if (element.isGetter() || element.isField()) { |
| assert(selector.isCall() || selector.isSetter()); |
| return types.dynamicType; |
| } else { |
| return returnTypeOfElement(element); |
| } |
| } |
| } |
| |
| class TypeGraphInferrer implements TypesInferrer { |
| TypeGraphInferrerEngine inferrer; |
| final Compiler compiler; |
| TypeGraphInferrer(Compiler this.compiler); |
| |
| String get name => 'Graph inferrer'; |
| |
| void analyzeMain(_) { |
| inferrer = new TypeGraphInferrerEngine(compiler); |
| inferrer.runOverAllElements(); |
| } |
| |
| TypeMask getReturnTypeOfElement(Element element) { |
| if (compiler.disableTypeInference) return compiler.typesTask.dynamicType; |
| // Currently, closure calls return dynamic. |
| if (element is! FunctionElement) return compiler.typesTask.dynamicType; |
| return inferrer.types.getInferredTypeOf(element).type; |
| } |
| |
| TypeMask getTypeOfElement(Element element) { |
| if (compiler.disableTypeInference) return compiler.typesTask.dynamicType; |
| // The inferrer stores the return type for a function, so we have to |
| // be careful to not return it here. |
| if (element is FunctionElement) return compiler.typesTask.functionType; |
| return inferrer.types.getInferredTypeOf(element).type; |
| } |
| |
| TypeMask getTypeOfNode(Element owner, Node node) { |
| if (compiler.disableTypeInference) return compiler.typesTask.dynamicType; |
| return inferrer.types.allocatedContainers[node].type; |
| } |
| |
| TypeMask getTypeOfSelector(Selector selector) { |
| if (compiler.disableTypeInference) return compiler.typesTask.dynamicType; |
| // Bailout for closure calls. We're not tracking types of |
| // closures. |
| if (selector.isClosureCall()) return compiler.typesTask.dynamicType; |
| if (selector.isSetter() || selector.isIndexSet()) { |
| return compiler.typesTask.dynamicType; |
| } |
| if (returnsElementType(selector)) { |
| ContainerTypeMask mask = selector.mask; |
| TypeMask elementType = mask.elementType; |
| return elementType == null ? compiler.typesTask.dynamicType : elementType; |
| } |
| |
| TypeMask result = const TypeMask.nonNullEmpty(); |
| Iterable<Element> elements = compiler.world.allFunctions.filter(selector); |
| for (Element element in elements) { |
| TypeMask type = |
| inferrer.typeOfElementWithSelector(element, selector).type; |
| result = result.union(type, compiler); |
| } |
| return result; |
| } |
| |
| Iterable<TypeMask> get containerTypes { |
| if (compiler.disableTypeInference) { |
| throw new UnsupportedError( |
| "Cannot query the type inferrer when type inference is disabled."); |
| } |
| return inferrer.types.allocatedContainers.values.map((info) => info.type); |
| } |
| |
| Iterable<Element> getCallersOf(Element element) { |
| if (compiler.disableTypeInference) { |
| throw new UnsupportedError( |
| "Cannot query the type inferrer when type inference is disabled."); |
| } |
| return inferrer.getCallersOf(element); |
| } |
| |
| void clear() { |
| inferrer.clear(); |
| } |
| } |
