Change List constructors.

sdk/lib/_internal/compiler/implementation/ssa/optimize.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 ssa;
 
 abstract class OptimizationPhase {
   String get name;
   void visitGraph(HGraph graph);
 }
@@ skipping 235 matching lines @@
       if (transformToDynamicInvocation) {
         return fromInterceptorToDynamicInvocation(node, node.selector);
       }
     }
 
     return node;
   }
 
   bool isFixedSizeListConstructor(HInvokeStatic node) {
     Element element = node.target.element;
     DartType defaultClass = compiler.listClass.defaultClass;

[ngeoffray, 2012/11/07 14:27:52]

Please add a TODO that this should be cached.

[floitsch, 2012/11/07 16:42:48]

Done.

+    if (defaultClass == null) return false;

[ngeoffray, 2012/11/07 14:27:52]

Also check if element is a constructor.

[floitsch, 2012/11/07 16:42:48]

Done.

+    Element fixedListLengthConstructor = compiler.listClass.lookupConstructor(
+        new Selector.callConstructor(const SourceString("fixedLength"),
+                                     compiler.listClass.getLibrary()));
     // TODO(ngeoffray): make sure that the only reason the List class is
     // not resolved is because it's not being used.
-    return element.isConstructor()
-        && defaultClass != null
-        && element.enclosingElement.declaration == defaultClass.element
-        && node.inputs.length == 2
-        && node.inputs[1].isInteger(types);
+    return element == fixedListLengthConstructor
+        && element.enclosingElement.declaration == defaultClass.element;

[ngeoffray, 2012/11/07 14:27:52]

Do this check earlier.

[floitsch, 2012/11/07 16:42:48]

Done.

   }
 
   HInstruction visitInvokeStatic(HInvokeStatic node) {
     if (isFixedSizeListConstructor(node)) {
       node.guaranteedType = HType.FIXED_ARRAY;
     }
     return node;
   }
 
   HInstruction visitInvokeDynamic(HInvokeDynamic node) {
@@ skipping 1076 matching lines @@
     }
 
     // For other fields having setters in the generative constructor body, set
     // the type to UNKNOWN to avoid relying on the type set in the initializer
     // list.
     allSetters.forEach((Element element) {
       backend.registerFieldConstructor(element, HType.UNKNOWN);
     });
   }
 }