Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ValuePhiNode.java @ 16496:b40984b06157
make PhiNode.singleValue behave correctly for null values (in guard phis)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Fri, 11 Jul 2014 16:41:14 +0200 |
parents | 6ce37ad3ea47 |
children | cbd42807a31f |
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/* * 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.graal.nodes; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.type.*; /** * Value {@link PhiNode}s merge data flow values at control flow merges. */ @NodeInfo(nameTemplate = "ValuePhi({i#values})") public class ValuePhiNode extends PhiNode { @Input final NodeInputList<ValueNode> values; /** * Create a value phi with the specified stamp. * * @param stamp the stamp of the value * @param merge the merge that the new phi belongs to */ public ValuePhiNode(Stamp stamp, MergeNode merge) { super(stamp, merge); assert stamp != StampFactory.forVoid(); values = new NodeInputList<>(this); } /** * Create a value phi with the specified stamp and the given values. * * @param stamp the stamp of the value * @param merge the merge that the new phi belongs to * @param values the initial values of the phi */ public ValuePhiNode(Stamp stamp, MergeNode merge, ValueNode[] values) { super(stamp, merge); assert stamp != StampFactory.forVoid(); this.values = new NodeInputList<>(this, values); } @Override public NodeInputList<ValueNode> values() { return values; } @Override public boolean inferStamp() { return updateStamp(StampTool.meet(values())); } }