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Side by Side Diff: pkg/fletchc/lib/src/compiled_class.dart

Issue 1170123004: Rename CompiledFunction to FletchFunctionBuilder and CompiledClass to FletchClassBuilder. (Closed) Base URL: git@github.com:dart-lang/fletch.git@master
Patch Set: Created 5 years, 6 months ago
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1 // Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE.md file.
4
5 library fletchc.compiled_class;
6
7 import 'package:compiler/src/dart_types.dart';
8 import 'package:compiler/src/elements/elements.dart';
9 import 'package:compiler/src/universe/universe.dart';
10
11 import 'compiled_function.dart' show
12 CompiledFunction;
13
14 import 'fletch_backend.dart';
15
16 class CompiledClass {
17 final int id;
18 final ClassElement element;
19 final CompiledClass superclass;
20
21 // The extra fields are synthetic fields not represented in any Dart source
22 // code. They are used for the synthetic closure classes that are introduced
23 // behind the scenes.
24 final int extraFields;
25
26 // TODO(kasperl): Hide these tables and go through a proper API to define
27 // and lookup methods.
28 final Map<int, int> implicitAccessorTable = <int, int>{};
29 final Map<int, CompiledFunction> methodTable = <int, CompiledFunction>{};
30
31 CompiledClass(this.id, this.element, this.superclass, {this.extraFields: 0});
32
33 /**
34 * Returns the number of instance fields of all the super classes of this
35 * class.
36 *
37 * If this class has no super class (if it's Object), 0 is returned.
38 */
39 int get superclassFields => hasSuperClass ? superclass.fields : 0;
40
41 bool get hasSuperClass => superclass != null;
42
43 int get fields {
44 int count = superclassFields + extraFields;
45 if (element != null) {
46 // TODO(kasperl): Once we change compiled class to be immutable, we
47 // should cache the field count.
48 element.implementation.forEachInstanceField((_, __) { count++; });
49 }
50 return count;
51 }
52
53 void addToMethodTable(int selector, CompiledFunction compiledFunction) {
54 methodTable[selector] = compiledFunction;
55 }
56
57 // Add a selector for is-tests. The selector is only to be hit with the
58 // InvokeTest bytecode, as the function is not guraranteed to be valid.
59 void addIsSelector(int selector) {
60 // TODO(ajohnsen): 'null' is a placeholder. Generate dummy function?
61 methodTable[selector] = null;
62 }
63
64 // The method table for a class is a mapping from Fletch's integer
65 // selectors to method ids. It contains all methods defined for a
66 // class including the implicit accessors.
67 Map<int, int> computeMethodTable(FletchBackend backend) {
68 Map<int, int> result = <int, int>{};
69 List<int> selectors = implicitAccessorTable.keys.toList()
70 ..addAll(methodTable.keys)
71 ..sort();
72 for (int selector in selectors) {
73 if (methodTable.containsKey(selector)) {
74 CompiledFunction function = methodTable[selector];
75 result[selector] = function == null ? 0 : function.methodId;
76 } else {
77 result[selector] = implicitAccessorTable[selector];
78 }
79 }
80 return result;
81 }
82
83 void createImplicitAccessors(FletchBackend backend) {
84 implicitAccessorTable.clear();
85 // If we don't have an element (stub class), we don't have anything to
86 // generate accessors for.
87 if (element == null) return;
88 // TODO(ajohnsen): Don't do this once dart2js can enqueue field getters in
89 // CodegenEnqueuer.
90 int fieldIndex = superclassFields;
91 element.implementation.forEachInstanceField((enclosing, field) {
92 var getter = new Selector.getter(field.name, field.library);
93 int getterSelector = backend.context.toFletchSelector(getter);
94 implicitAccessorTable[getterSelector] = backend.makeGetter(fieldIndex);
95
96 if (!field.isFinal) {
97 var setter = new Selector.setter(field.name, field.library);
98 var setterSelector = backend.context.toFletchSelector(setter);
99 implicitAccessorTable[setterSelector] = backend.makeSetter(fieldIndex);
100 }
101
102 fieldIndex++;
103 });
104 }
105
106 void createIsEntries(FletchBackend backend) {
107 if (element == null) return;
108
109 Set superclasses = new Set();
110 for (CompiledClass current = superclass;
111 current != null;
112 current = current.superclass) {
113 superclasses.add(current.element);
114 }
115
116 void createFor(ClassElement classElement) {
117 if (superclasses.contains(classElement)) return;
118 int fletchSelector = backend.context.toFletchIsSelector(classElement);
119 addIsSelector(fletchSelector);
120 }
121
122 // Create for the current element.
123 createFor(element);
124
125 // Add all types related to 'implements'.
126 for (InterfaceType interfaceType in element.interfaces) {
127 createFor(interfaceType.element);
128 for (DartType type in interfaceType.element.allSupertypes) {
129 createFor(type.element);
130 }
131 }
132 }
133
134 void createIsFunctionEntry(FletchBackend backend) {
135 int fletchSelector = backend.context.toFletchIsSelector(
136 backend.compiler.functionClass);
137 addIsSelector(fletchSelector);
138 }
139
140 String toString() => "CompiledClass(${element.name}, $id)";
141 }
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