Change List constructors.

sdk/lib/_internal/compiler/implementation/ssa/optimize.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/optimize.dart b/sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
index e27f697219c86f8b502a192a324313fd6a712c9c..ba1fa66413480c496246f1b7f87b9ad6473ea3be 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
@@ -254,13 +254,14 @@ class SsaConstantFolder extends HBaseVisitor implements OptimizationPhase {
   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) {