Split backend implementation of EnqueuerListener

pkg/compiler/lib/src/ssa/builder.dart

 // Copyright (c) 2012, 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.
 
 import 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 389 matching lines @@
         index++;
       });
     }
     return compiledArguments;
   }
 
   /**
    * Try to inline [element] within the correct context of the builder. The
    * insertion point is the state of the builder.
    */
-  bool tryInlineMethod(Element element, Selector selector, TypeMask mask,
+  bool tryInlineMethod(MethodElement element, Selector selector, TypeMask mask,
       List<HInstruction> providedArguments, ast.Node currentNode,
       {ResolutionInterfaceType instanceType}) {
-    registry
-        .addImpact(backend.registerUsedElement(element, forResolution: false));
+    registry.addImpact(
+        backend.codegenEnqueuerListener.registerUsedElement(element));
 
     if (backend.isJsInterop(element) && !element.isFactoryConstructor) {
       // We only inline factory JavaScript interop constructors.
       return false;
     }
 
     // Ensure that [element] is an implementation element.
     element = element.implementation;
 
     if (compiler.elementHasCompileTimeError(element)) return false;
@@ skipping 2253 matching lines @@
     }
     push(new HStringConcat(inputs[0], inputs[1], commonMasks.stringType));
   }
 
   void handleForeignJsCurrentIsolateContext(ast.Send node) {
     if (!node.arguments.isEmpty) {
       reporter.internalError(
           node, 'Too many arguments to JS_CURRENT_ISOLATE_CONTEXT.');
     }
 
-    if (!backend.hasIsolateSupport) {
+    if (!backend.backendUsage.isIsolateInUse) {
       // If the isolate library is not used, we just generate code
       // to fetch the static state.
       String name = backend.namer.staticStateHolder;
       push(new HForeignCode(
           js.js.parseForeignJS(name), commonMasks.dynamicType, <HInstruction>[],
           nativeBehavior: native.NativeBehavior.DEPENDS_OTHER));
     } else {
       // Call a helper method from the isolate library. The isolate
       // library uses its own isolate structure, that encapsulates
       // Leg's isolate.
@@ skipping 176 matching lines @@
         }
       }
     }
     reporter.reportErrorMessage(
         node, MessageKind.WRONG_ARGUMENT_FOR_JS_INTERCEPTOR_CONSTANT);
     stack.add(graph.addConstantNull(closedWorld));
   }
 
   void handleForeignJsCallInIsolate(ast.Send node) {
     Link<ast.Node> link = node.arguments;
-    if (!backend.hasIsolateSupport) {
+    if (!backend.backendUsage.isIsolateInUse) {
       // If the isolate library is not used, we just invoke the
       // closure.
       visit(link.tail.head);
       push(new HInvokeClosure(new Selector.callClosure(0),
           <HInstruction>[pop()], commonMasks.dynamicType));
     } else {
       // Call a helper method from the isolate library.
       MethodElement element = helpers.callInIsolate;
       if (element == null) {
         reporter.internalError(node, 'Isolate library and compiler mismatch.');
@@ skipping 121 matching lines @@
   generateSuperNoSuchMethodSend(
       ast.Send node, Selector selector, List<HInstruction> arguments) {
     String name = selector.name;
 
     ClassElement cls = currentNonClosureClass;
     MethodElement element = cls.lookupSuperMember(Identifiers.noSuchMethod_);
     if (!Selectors.noSuchMethod_.signatureApplies(element)) {
       ClassElement objectClass = commonElements.objectClass;
       element = objectClass.lookupMember(Identifiers.noSuchMethod_);
     }
-    if (backend.hasInvokeOnSupport && !element.enclosingClass.isObject) {
+    if (backend.backendUsage.isInvokeOnUsed &&
+        !element.enclosingClass.isObject) {
       // Register the call as dynamic if [noSuchMethod] on the super
       // class is _not_ the default implementation from [Object], in
       // case the [noSuchMethod] implementation calls
       // [JSInvocationMirror._invokeOn].
       // TODO(johnniwinther): Register this more precisely.
       registry?.registerDynamicUse(new DynamicUse(selector, null));
     }
     String publicName = name;
     if (selector.isSetter) publicName += '=';
 
@@ skipping 3693 matching lines @@
       this.oldReturnLocal,
       this.oldReturnType,
       this.oldResolvedAst,
       this.oldStack,
       this.oldLocalsHandler,
       this.inTryStatement,
       this.allFunctionsCalledOnce,
       this.oldElementInferenceResults)
       : super(function);
 }