Mercurial > hg > truffle
view graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/InsertStateAfterPlaceholderPhase.java @ 8954:82d8fac3ad13
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 09 Apr 2013 18:08:57 +0200 |
parents | 5e3d1a68664e |
children | bf6943c12840 |
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/* * Copyright (c) 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.phases.common; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.phases.*; public class InsertStateAfterPlaceholderPhase extends Phase { private static class PlaceholderNode extends AbstractStateSplit implements StateSplit, Node.IterableNodeType, LIRLowerable, Canonicalizable { public PlaceholderNode() { super(StampFactory.forVoid()); } @Override public void generate(LIRGeneratorTool gen) { // nothing to do } @Override public boolean hasSideEffect() { return false; } @Override public ValueNode canonical(CanonicalizerTool tool) { if (stateAfter() == null) { return null; } FixedNode next = next(); if (next instanceof PlaceholderNode && ((PlaceholderNode) next).stateAfter() != null) { return null; } return this; } } @Override protected void run(StructuredGraph graph) { boolean needsPlaceHolder = false; for (Node node : graph.getNodes().filterInterface(StateSplit.class)) { StateSplit stateSplit = (StateSplit) node; if (stateSplit.hasSideEffect() && stateSplit.stateAfter() != null) { needsPlaceHolder = true; } } if (needsPlaceHolder) { for (ReturnNode ret : graph.getNodes(ReturnNode.class)) { PlaceholderNode p = graph.add(new PlaceholderNode()); p.setStateAfter(graph.add(new FrameState(FrameState.AFTER_BCI))); graph.addBeforeFixed(ret, p); } } } }