Widen big concrete types to dynamic.

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

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/sdk/lib/_internal/compiler/implementation/compiler.dart b/sdk/lib/_internal/compiler/implementation/compiler.dart
index 1de80f07f742a4ee91d05cf2849b3efa9db58655..3ae214caeeabcc6d0ac1a797181789109baae12f 100644
--- a/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -115,6 +115,7 @@ abstract class Compiler implements DiagnosticListener {
   final bool enableTypeAssertions;
   final bool enableUserAssertions;
   final bool enableConcreteTypeInference;
+  final int maxConcreteTypeSize;

[ahe, 2012/12/20 10:18:22]

Please document this variable.

[polux, 2012/12/20 10:31:50]

Done.

   final bool analyzeAll;
   final bool enableNativeLiveTypeAnalysis;
   final bool rejectDeprecatedFeatures;
@@ -233,6 +234,7 @@ abstract class Compiler implements DiagnosticListener {
             this.enableTypeAssertions: false,
             this.enableUserAssertions: false,
             this.enableConcreteTypeInference: false,
+            this.maxConcreteTypeSize: 5,
             this.enableMinification: false,
             this.enableNativeLiveTypeAnalysis: false,
             bool emitJavaScript: true,