--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ConstantPool.java	Wed May 27 00:36:16 2015 +0200
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2009, 2014, 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 com.oracle.jvmci.meta;
+
+/**
+ * Represents the runtime representation of the constant pool that is used by the compiler when
+ * parsing bytecode. Provides methods to look up a constant pool entry without performing
+ * resolution. They are used during compilation.
+ */
+public interface ConstantPool {
+
+    /**
+     * Returns the number of entries the constant pool.
+     *
+     * @return number of entries in the constant pool
+     */
+    int length();
+
+    /**
+     * Ensures that the type referenced by the specified constant pool entry is loaded and
+     * initialized. This can be used to compile time resolve a type. It works for field, method, or
+     * type constant pool entries.
+     *
+     * @param cpi the index of the constant pool entry that references the type
+     * @param opcode the opcode of the instruction that references the type
+     */
+    void loadReferencedType(int cpi, int opcode);
+
+    /**
+     * Looks up a reference to a field. If {@code opcode} is non-negative, then resolution checks
+     * specific to the bytecode it denotes are performed if the field is already resolved. Should
+     * any of these checks fail, an unresolved field reference is returned.
+     *
+     * @param cpi the constant pool index
+     * @param opcode the opcode of the instruction for which the lookup is being performed or
+     *            {@code -1}
+     * @return a reference to the field at {@code cpi} in this pool
+     * @throws ClassFormatError if the entry at {@code cpi} is not a field
+     */
+    JavaField lookupField(int cpi, int opcode);
+
+    /**
+     * Looks up a reference to a method. If {@code opcode} is non-negative, then resolution checks
+     * specific to the bytecode it denotes are performed if the method is already resolved. Should
+     * any of these checks fail, an unresolved method reference is returned.
+     *
+     * @param cpi the constant pool index
+     * @param opcode the opcode of the instruction for which the lookup is being performed or
+     *            {@code -1}
+     * @return a reference to the method at {@code cpi} in this pool
+     * @throws ClassFormatError if the entry at {@code cpi} is not a method
+     */
+    JavaMethod lookupMethod(int cpi, int opcode);
+
+    /**
+     * Looks up a reference to a type. If {@code opcode} is non-negative, then resolution checks
+     * specific to the bytecode it denotes are performed if the type is already resolved. Should any
+     * of these checks fail, an unresolved type reference is returned.
+     *
+     * @param cpi the constant pool index
+     * @param opcode the opcode of the instruction for which the lookup is being performed or
+     *            {@code -1}
+     * @return a reference to the compiler interface type
+     */
+    JavaType lookupType(int cpi, int opcode);
+
+    /**
+     * Looks up an Utf8 string.
+     *
+     * @param cpi the constant pool index
+     * @return the Utf8 string at index {@code cpi} in this constant pool
+     */
+    String lookupUtf8(int cpi);
+
+    /**
+     * Looks up a method signature.
+     *
+     * @param cpi the constant pool index
+     * @return the method signature at index {@code cpi} in this constant pool
+     */
+    Signature lookupSignature(int cpi);
+
+    /**
+     * Looks up a constant at the specified index.
+     *
+     * @param cpi the constant pool index
+     * @return the {@code Constant} or {@code JavaType} instance representing the constant pool
+     *         entry
+     */
+    Object lookupConstant(int cpi);
+
+    /**
+     * Looks up the appendix at the specified index.
+     *
+     * @param cpi the constant pool index
+     * @param opcode the opcode of the instruction for which the lookup is being performed or
+     *            {@code -1}
+     * @return the appendix if it exists and is resolved or {@code null}
+     */
+    JavaConstant lookupAppendix(int cpi, int opcode);
+}