/*
 * Copyright (c) 2009, 2012, 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
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 * questions.
 */
package com.oracle.graal.api.code;

import com.oracle.graal.api.meta.*;

/**
 * The name, signature and calling convention of a call from compiled code to the runtime. The
 * target of such a call may be a leaf stub or a call into the runtime code proper.
 */
public interface RuntimeCallTarget extends InvokeTarget {

    CallingConvention getCallingConvention();

    /**
     * Returns the maximum absolute offset of PC relative call to this stub from any position in the
     * code cache or -1 when not applicable. Intended for determining the required size of
     * address/offset fields.
     */
    long getMaxCallTargetOffset();

    ForeignCallDescriptor getDescriptor();

    /**
     * Determines if the target routine destroys all registers.
     * 
     * @return {@code true} if the register allocator must save all live registers around a call to
     *         this target
     */
    boolean destroysRegisters();
}