--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Tue Oct 14 20:02:44 2014 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Tue Oct 14 20:02:44 2014 +0200
@@ -99,6 +99,32 @@
     }
 
     /**
+     * Returns a boolean indicating whether or not a given value is seen as constant in optimized
+     * code. If this method is called in the interpreter this method will always return
+     * <code>false</code>. This API may be used in combination with {@link #inCompiledCode()} to
+     * implement compilation constant assertions in the following way:
+     *
+     * <pre>
+     * <code>
+     * void assertCompilationConstant(Object value) {
+     *   if (inCompiledCode()) {
+     *     if (!isCompilationConstant(value)) {
+     *       throw new AssertionError("Given value is not constant");
+     *     }
+     *   }
+     * }
+     * </code>
+     * </pre>
+     *
+     * @param value
+     * @return {@code true} when given value is seen as compilation constant, {@code false} if not
+     *         compilation constant.
+     */
+    public static boolean isCompilationConstant(Object value) {
+        return false;
+    }
+
+    /**
      * Directive for the compiler that the given runnable should only be executed in the interpreter
      * and ignored in the compiled code.
      *