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/*
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* Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.nodes.memory;
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import org.graalvm.compiler.graph.Node;
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import org.graalvm.compiler.nodes.FixedNode;
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import org.graalvm.compiler.nodes.FixedNodeInterface;
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import jdk.internal.vm.compiler.word.LocationIdentity;
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/**
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* This interface marks subclasses of {@link FixedNode} that kill a set of memory locations
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* represented by location identities (i.e. change a value at one or more locations that belong to
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* these location identities).
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*/
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public interface MemoryCheckpoint extends MemoryNode, FixedNodeInterface {
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interface Single extends MemoryCheckpoint {
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/**
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* This method is used to determine which memory location is killed by this node. Returning
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* the special value {@link LocationIdentity#any()} will kill all memory locations.
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*
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* @return the identity of the location killed by this node.
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*/
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LocationIdentity getKilledLocationIdentity();
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}
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interface Multi extends MemoryCheckpoint {
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/**
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* This method is used to determine which set of memory locations is killed by this node.
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* Returning the special value {@link LocationIdentity#any()} will kill all memory
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* locations.
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*
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* @return the identities of all locations killed by this node.
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*/
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LocationIdentity[] getKilledLocationIdentities();
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}
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class TypeAssertion {
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public static boolean correctType(Node node) {
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return !(node instanceof MemoryCheckpoint) || (node instanceof MemoryCheckpoint.Single ^ node instanceof MemoryCheckpoint.Multi);
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}
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}
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}
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