# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1378057146 -7200
# Node ID 3662471dcfaa9d1d6988152c520f997acf1812fe
# Parent  96e4e5333a257e7e35ffb1084643b38cd6b51416
Introduce CompilerDirectives.ValueType annotation in Truffle API.

diff -r 96e4e5333a25 -r 3662471dcfaa graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Sat Aug 31 09:18:58 2013 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Sun Sep 01 19:39:06 2013 +0200
@@ -205,4 +205,13 @@
     @Target({ElementType.METHOD})
     public @interface SlowPath {
     }
+
+    /**
+     * Marks classes as value types. Reference comparisons (==) between instances of those classes
+     * have undefined semantics and can either return true or false.
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target({ElementType.TYPE})
+    public @interface ValueType {
+    }
 }