Make native implementation classes for classes that are used as targets in @MirrorsUsed available f…

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 js_backend;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
   final Set<HInstruction> allocatedFixedLists = new Set<HInstruction>();
 }
@@ skipping 1276 matching lines @@
           LibraryElement importedLibrary = library.getLibraryFromTag(tag);
           if (importedLibrary != compiler.mirrorsLibrary) continue;
           compiler.withCurrentElement(library, () {
             compiler.reportInfo(importTag, MessageKind.MIRROR_IMPORT);
           });
         }
       }
     }
   }
 
+  Element getDartClass(Element element) {

[Johnni Winther, 2013/11/14 19:14:19]

We have the reverse relation encoded somewhere in the backend. Maybe we should
pull the information from a common data structure.

[karlklose, 2013/11/15 08:44:52]

It just below ;-)

Done.

+    if (element == jsIntClass) {
+      return compiler.intClass;
+    } else if (element == jsBoolClass) {
+      return compiler.boolClass;
+    } else if (element == jsNumberClass) {
+      return compiler.numClass;
+    } else if (element == jsDoubleClass) {
+      return compiler.doubleClass;
+    } else if (element == jsStringClass) {
+      return compiler.stringClass;
+    } else if (element == jsArrayClass) {
+      return compiler.listClass;
+    } else {
+      return element;
+    }
+  }
+
   Element getImplementationClass(Element element) {
     if (element == compiler.intClass) {
       return jsIntClass;
     } else if (element == compiler.boolClass) {
       return jsBoolClass;
     } else if (element == compiler.numClass) {
       return jsNumberClass;
     } else if (element == compiler.doubleClass) {
       return jsDoubleClass;
     } else if (element == compiler.stringClass) {
@@ skipping 423 matching lines @@
     if (hasInsufficientMirrorsUsed) return true;
     return isNeededForReflection(element);
   }
 
   /**
    * Returns `true` if the emitter must emit the element even though there
    * is no direct use in the program, but because the reflective system may
    * need to access it.
    */
   bool isNeededForReflection(Element element) {
+    element = getDartClass(element);
     if (hasInsufficientMirrorsUsed) return isTreeShakingDisabled;
     /// Record the name of [element] in [symbolsUsed]. Return true for
     /// convenience.
     bool registerNameOf(Element element) {
       symbolsUsed.add(element.name);
       if (element.isConstructor()) {
         symbolsUsed.add(element.getEnclosingClass().name);
       }
       return true;
     }
@@ skipping 152 matching lines @@
     copy(constant.values);
     copy(constant.protoValue);
     copy(constant);
   }
 
   void visitConstructed(ConstructedConstant constant) {
     copy(constant.fields);
     copy(constant);
   }
 }