Implement CONST_CLASS in optimizing compiler.

Change-Id: Ia8c8dfbef87cb2f7893bfb6e178466154eec9efd
diff --git a/test/420-const-class/src/Main.java b/test/420-const-class/src/Main.java
new file mode 100644
index 0000000..44a7436
--- /dev/null
+++ b/test/420-const-class/src/Main.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class Main {
+  static class Other {
+  }
+
+  static class OtherWithClinit {
+    static int a;
+    static {
+      System.out.println("Hello from OtherWithClinit");
+      a = 42;
+    }
+  }
+
+  static class OtherWithClinit2 {
+    static int a;
+    static {
+      System.out.println("Hello from OtherWithClinit2");
+      a = 43;
+    }
+  }
+
+  public static void main(String[] args) {
+    // Call methods twice in case they have a slow path.
+
+    System.out.println($opt$LoadThisClass());
+    System.out.println($opt$LoadThisClass());
+
+    System.out.println($opt$LoadOtherClass());
+    System.out.println($opt$LoadOtherClass());
+
+    System.out.println($opt$LoadSystemClass());
+    System.out.println($opt$LoadSystemClass());
+
+    $opt$ClinitCheckAndLoad();
+    $opt$ClinitCheckAndLoad();
+
+    $opt$LoadAndClinitCheck();
+    $opt$LoadAndClinitCheck();
+  }
+
+  public static Class $opt$LoadThisClass() {
+    return Main.class;
+  }
+
+  public static Class $opt$LoadOtherClass() {
+    return Other.class;
+  }
+
+  public static Class $opt$LoadSystemClass() {
+    return System.class;
+  }
+
+  public static void $opt$ClinitCheckAndLoad() {
+    System.out.println(OtherWithClinit.a);
+    System.out.println(OtherWithClinit.class);
+  }
+
+  public static void $opt$LoadAndClinitCheck() {
+    System.out.println(OtherWithClinit2.class);
+    System.out.println(OtherWithClinit2.a);
+  }
+}