Be smarter about when disabling tree-shaking.

dart/sdk/lib/_internal/compiler/implementation/compiler.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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 164 matching lines @@
   ClassElement get boolImplementation => compiler.boolClass;
   ClassElement get nullImplementation => compiler.nullClass;
 
   ClassElement defaultSuperclass(ClassElement element) => compiler.objectClass;
 
   bool isDefaultNoSuchMethodImplementation(Element element) {
     assert(element.name == Compiler.NO_SUCH_METHOD);
     ClassElement classElement = element.getEnclosingClass();
     return classElement == compiler.objectClass;
   }
+
+  void enableMirrors() {}
+
+  void registerStaticUse(Element element, Enqueuer enqueuer) {}
 }
 
 /**
  * Key class used in [TokenMap] in which the hash code for a token is based
  * on the [charOffset].
  */
 class TokenKey {
   final Token token;
   TokenKey(this.token);
   int get hashCode => token.charOffset;
@@ skipping 322 matching lines @@
 
   Universe get resolverWorld => enqueuer.resolution.universe;
   Universe get codegenWorld => enqueuer.codegen.universe;
 
   bool get hasBuildId => buildId != UNDETERMINED_BUILD_ID;
 
   bool get mirrorsEnabled => mirrorSystemClass != null;
 
   bool get analyzeAll => analyzeAllFlag || compileAll;
 
-  bool get compileAll => mirrorsEnabled;
+  bool get compileAll => false;

[ngeoffray, 2013/06/12 19:38:42]

Why do you want to keep this?

[ahe, 2013/06/14 12:00:22]

I think it is useful for testing.  We should add a test that compiles all the
libraries.

 
   bool get disableTypeInference => disableTypeInferenceFlag || mirrorsEnabled;
 
   int getNextFreeClassId() => nextFreeClassId++;
 
   void ensure(bool condition) {
     if (!condition) cancel('failed assertion in leg');
   }
 
   void unimplemented(String methodName,
@@ skipping 118 matching lines @@
     if (dynamicClass != null) {
       // When loading the built-in libraries, dynamicClass is null. We
       // take advantage of this as core imports js_helper and sees [dynamic]
       // this way.
       withCurrentElement(dynamicClass, () {
         library.addToScope(dynamicClass, this);
       });
     }
     if (uri == Uri.parse('dart:mirrors')) {
       mirrorSystemClass = library.find(const SourceString('MirrorSystem'));
+      backend.enableMirrors();
       metadataHandler = constantHandler;
     } else if (uri == Uri.parse('dart:_collection-dev')) {
       symbolImplementationClass = library.find(const SourceString('Symbol'));
     }
   }
 
   void onClassResolved(ClassElement cls) {
     if (mirrorSystemClass == cls) {
       mirrorSystemGetNameFunction =
         cls.lookupLocalMember(const SourceString('getName'));
@@ skipping 711 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }