001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.spi;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028
029public interface UncheckedInterfaceProvider {
030    /**
031     * Returns a stamp containing information about interface types that has not been verified or
032     * null if no such stamp is available. A type check is needed before using informations from
033     * this stamp.
034     */
035    Stamp uncheckedStamp();
036
037    static Stamp uncheckedOrNull(JavaType type, Stamp originalStamp) {
038        if (type instanceof ResolvedJavaType && type.getKind() == Kind.Object) {
039            Stamp unchecked = StampFactory.declaredTrusted((ResolvedJavaType) type);
040            if (!unchecked.equals(originalStamp)) {
041                return unchecked;
042            }
043        }
044        return null;
045    }
046}