--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/PlatformKind.java	Thu Oct 08 17:28:41 2015 -0700
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.vm.ci.meta;
+
+/**
+ * Represents a platform-specific low-level type for values.
+ */
+public interface PlatformKind {
+
+    String name();
+
+    public interface Key {
+
+    }
+
+    public class EnumKey<E extends Enum<E>> implements Key {
+        private final Enum<E> e;
+
+        public EnumKey(Enum<E> e) {
+            this.e = e;
+        }
+
+        @Override
+        public int hashCode() {
+            return e.ordinal() ^ e.name().hashCode();
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj == this) {
+                return true;
+            }
+            if (obj instanceof EnumKey) {
+                EnumKey<?> that = (EnumKey<?>) obj;
+                return this.e == that.e;
+            }
+            return false;
+        }
+    }
+
+    /**
+     * Gets a value associated with this object that can be used as a stable key in a map. The
+     * {@link Object#hashCode()} implementation of the returned value should be stable between VM
+     * executions.
+     */
+    Key getKey();
+
+    /**
+     * Get the size in bytes of this {@link PlatformKind}.
+     */
+    int getSizeInBytes();
+
+    /**
+     * Returns how many primitive values fit in this {@link PlatformKind}. For scalar types this is
+     * one, for SIMD types it may be higher.
+     */
+    int getVectorLength();
+
+    /**
+     * Gets a single type char that identifies this type for use in debug output.
+     */
+    char getTypeChar();
+}