Create and cache method extraction stub in the ICData.

tests/language/fast_method_extraction_test.dart

Index: tests/language/fast_method_extraction_test.dart
diff --git a/tests/language/fast_method_extraction_test.dart b/tests/language/fast_method_extraction_test.dart
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+// 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.
+// Test that fast method extraction returns correct closure.
+
+class A {
+  var f;
+  A(this.f);
+  foo() => 40 + f;
+}
+
+class B {
+  var f;
+  B(this.f);
+  foo() => -40 - f;
+}
+
+class X { }
+
+class C<T> {
+  foo(v) => v is T;
+}
+
+class ChaA {
+  final magic;
+  ChaA(magic) : this.magic = magic;
+
+  foo() {
+    Expect.isTrue(this is ChaA);
+    Expect.equals("magicA", magic);
+    return "A";
+  }
+
+  bar() => foo;
+}
+
+class ChaB extends ChaA {
+  ChaB(magic) : super(magic);
+
+  foo() {
+    Expect.isTrue(this is ChaB);
+    Expect.equals("magicB", magic);
+    return "B";
+  }
+}
+
+mono(a) {
+  var f = a.foo;
+  return f();
+}
+
+poly(a) {
+  var f = a.foo;
+  return f();
+}
+
+types(a, b) {
+  var f = a.foo;
+  Expect.isTrue(f(b));
+}
+
+cha(a) {
+  var f = a.bar();
+  return f();
+}
+
+extractFromNull() {
+  var f = (null).toString;
+  Expect.equals("null", f());
+}
+
+main() {
+  var a = new A(2);
+  var b = new B(2);
+  for (var i = 0; i < 10000; i++) {
+    Expect.equals(42, mono(a));
+  }
+
+  for (var i = 0; i < 10000; i++) {
+    Expect.equals(42, poly(a));
+    Expect.equals(-42, poly(b));
+  }
+
+  var c = new C<X>();
+  var x = new X();
+  for (var i = 0; i < 10000; i++) {
+    types(c, x);
+  }
+
+  var chaA = new ChaA("magicA");
+  for (var i = 0; i < 10000; i++) {
+    Expect.equals("A", cha(chaA));
+  }
+
+  var chaB = new ChaB("magicB");
+  for (var i = 0; i < 10000; i++) {
+    Expect.equals("B", cha(chaB));
+  }
+
+  for (var i = 0; i < 10000; i++) {
+    extractFromNull();
+  }
+}
+