dart2js: use WorldImpact for dump_info

pkg/compiler/lib/src/dump_info.dart

 // 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 dump_info;
 
 import 'dart:convert'
     show HtmlEscape, JsonEncoder, StringConversionSink, ChunkedConversionSink;
 
 import 'package:dart2js_info/info.dart';
 
 import 'common.dart';
 import 'common/tasks.dart' show CompilerTask;
 import 'constants/values.dart' show ConstantValue, InterceptorConstantValue;
 import 'compiler.dart' show Compiler;
 import 'elements/elements.dart';
 import 'elements/visitor.dart';
 import 'types/types.dart' show TypeMask;
 import 'deferred_load.dart' show OutputUnit;
 import 'js_backend/js_backend.dart' show JavaScriptBackend;
 import 'js_emitter/full_emitter/emitter.dart' as full show Emitter;
 import 'js/js.dart' as jsAst;
-import 'universe/use.dart' show
-    DynamicUse;
+import 'universe/use.dart' show DynamicUse;
+import 'universe/universe.dart' show ReceiverConstraint;
 import 'info/send_info.dart' show collectSendMeasurements;
 
 class ElementInfoCollector extends BaseElementVisitor<Info, dynamic> {
   final Compiler compiler;
 
   final AllInfo result = new AllInfo();
   final Map<Element, Info> _elementToInfo = <Element, Info>{};
   final Map<ConstantValue, Info> _constantToInfo = <ConstantValue, Info>{};
   final Map<OutputUnit, OutputUnitInfo> _outputToInfo = {};
 
@@ skipping 10 matching lines @@
       result.constants.add(info);
     });
     compiler.libraryLoader.libraries.forEach(visit);
   }
 
   Info visit(Element e, [_]) => e.accept(this, null);
 
   /// Whether to emit information about [element].
   ///
   /// By default we emit information for any element that contributes to the
-  /// output size. Either becuase the it is a function being emitted or inlined,
+  /// output size. Either because the it is a function being emitted or inlined,
   /// or because it is an element that holds dependencies to other elements.
   bool shouldKeep(Element element) {
-    return compiler.dumpInfoTask.selectorsFromElement.containsKey(element) ||
+    return compiler.enqueuer.codegen.impacts.containsKey(element) ||
         compiler.dumpInfoTask.inlineCount.containsKey(element);
   }
 
   /// Visits [element] and produces it's corresponding info.
   Info process(Element element) {
     // TODO(sigmund): change the visit order to eliminate the need to check
     // whether or not an element has been processed.
     return _elementToInfo.putIfAbsent(element, () => visit(element));
   }
 
@@ skipping 273 matching lines @@
     if (outputUnit == null) {
       assert(constant is InterceptorConstantValue);
       return null;
     }
     return _infoFromOutputUnit(outputUnit);
   }
 }
 
 class Selection {
   final Element selectedElement;
-  final TypeMask mask;
+  final ReceiverConstraint mask;
   Selection(this.selectedElement, this.mask);
 }
 
 /// Interface used to record information from different parts of the compiler so
 /// we can emit them in the dump-info task.
 // TODO(sigmund,het): move more features here. Ideally the dump-info task
 // shouldn't reach into internals of other parts of the compiler. For example,
 // we currently reach into the full emitter and as a result we don't support
 // dump-info when using the startup-emitter (issue #24190).
 abstract class InfoReporter {
@@ skipping 16 matching lines @@
   final Set<jsAst.Node> _tracking = new Set<jsAst.Node>();
   // A mapping from Dart Elements to Javascript AST Nodes.
   final Map<Element, List<jsAst.Node>> _elementToNodes =
       <Element, List<jsAst.Node>>{};
   final Map<ConstantValue, jsAst.Node> _constantToNode =
       <ConstantValue, jsAst.Node>{};
   // A mapping from Javascript AST Nodes to the size of their
   // pretty-printed contents.
   final Map<jsAst.Node, int> _nodeToSize = <jsAst.Node, int>{};
 
-  final Map<Element, Set<DynamicUse>> selectorsFromElement = {};
   final Map<Element, int> inlineCount = <Element, int>{};
   // A mapping from an element to a list of elements that are
   // inlined inside of it.
   final Map<Element, List<Element>> inlineMap = <Element, List<Element>>{};
 
   /// Register the size of the generated output.
   void reportSize(int programSize) {
     _programSize = programSize;
   }
 
   void reportInlined(Element element, Element inlinedFrom) {
     inlineCount.putIfAbsent(element, () => 0);
     inlineCount[element] += 1;
     inlineMap.putIfAbsent(inlinedFrom, () => new List<Element>());
     inlineMap[inlinedFrom].add(element);
   }
 
-  /**
-   * Registers that a function uses a selector in the
-   * function body
-   */
-  void elementUsesSelector(Element element, DynamicUse selector) {
-    if (compiler.dumpInfo) {
-      selectorsFromElement
-          .putIfAbsent(element, () => new Set<DynamicUse>())
-          .add(selector);
-    }
-  }
-
   final Map<Element, Set<Element>> _dependencies = {};
   void registerDependency(Element source, Element target) {
     _dependencies.putIfAbsent(source, () => new Set()).add(target);
   }
 
   /**
    * Returns an iterable of [Selection]s that are used by
    * [element].  Each [Selection] contains an element that is
    * used and the selector that selected the element.
    */
   Iterable<Selection> getRetaining(Element element) {
-    if (!selectorsFromElement.containsKey(element)) {
-      return const <Selection>[];
-    } else {
-      return selectorsFromElement[element].expand((DynamicUse selector) {
-        return compiler.world.allFunctions
-            .filter(selector.selector, selector.mask)
-            .map((element) {
-          return new Selection(element, selector.mask);
-        });
-      });
-    }
+    var impact = compiler.enqueuer.codegen.impacts[element];
+    if (impact == null) return const <Selection>[];
+
+    var selections = <Selection>[];
+    selections.addAll(impact.dynamicUses.expand((dynamicUse) {
+      return compiler.world.allFunctions
+          .filter(dynamicUse.selector, dynamicUse.mask)
+          .map((e) => new Selection(e, dynamicUse.mask));
+    }));
+    selections.addAll(impact.staticUses
+        .map((staticUse) => new Selection(staticUse.element, null)));
+    return selections;
   }
 
   // Returns true if we care about tracking the size of
   // this node.
   bool isTracking(jsAst.Node code) {
     if (compiler.dumpInfo) {
       return _tracking.contains(code);
     } else {
       return false;
     }
@@ skipping 124 matching lines @@
 
     ChunkedConversionSink<Object> sink = encoder.startChunkedConversion(
         new StringConversionSink.fromStringSink(buffer));
     sink.add(new AllInfoJsonCodec().encode(result));
     reporter.reportInfo(NO_LOCATION_SPANNABLE, MessageKind.GENERIC, {
       'text': "View the dumped .info.json file at "
           "https://dart-lang.github.io/dump-info-visualizer"
     });
   }
 }