Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/phases/OnStackReplacementPhase.java @ 22992:dd3f7ad81b73
Split com.oracle.graal.loop in 2 parts, Make LoopPolicies extensible
Moved the phases out of com.oracle.graal.loop into com.oracle.graal.loop.phases.
Made LoopPolicies an interface with a default implementation.
Pass a LoopPolicies instance to the different loop phases constructors.
Add abstract classes for loop phases to hold onto the loop polcies.
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Fri, 13 Nov 2015 14:12:43 +0100 |
parents | 3e8357b49024 |
children | 1c5c04b9aaf1 |
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/* * Copyright (c) 2011, 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.hotspot.phases; import static com.oracle.graal.phases.common.DeadCodeEliminationPhase.Optionality.Required; import jdk.vm.ci.code.BailoutException; import jdk.vm.ci.common.JVMCIError; import jdk.vm.ci.runtime.JVMCICompiler; import com.oracle.graal.debug.Debug; import com.oracle.graal.graph.Node; import com.oracle.graal.graph.iterators.NodeIterable; import com.oracle.graal.loop.LoopEx; import com.oracle.graal.loop.LoopsData; import com.oracle.graal.loop.phases.LoopTransformations; import com.oracle.graal.nodeinfo.InputType; import com.oracle.graal.nodeinfo.Verbosity; import com.oracle.graal.nodes.AbstractBeginNode; import com.oracle.graal.nodes.EntryMarkerNode; import com.oracle.graal.nodes.FixedNode; import com.oracle.graal.nodes.FrameState; import com.oracle.graal.nodes.ProxyNode; import com.oracle.graal.nodes.StartNode; import com.oracle.graal.nodes.StructuredGraph; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.extended.OSRLocalNode; import com.oracle.graal.nodes.extended.OSRStartNode; import com.oracle.graal.nodes.util.GraphUtil; import com.oracle.graal.phases.Phase; import com.oracle.graal.phases.common.DeadCodeEliminationPhase; public class OnStackReplacementPhase extends Phase { @Override protected void run(StructuredGraph graph) { if (graph.getEntryBCI() == JVMCICompiler.INVOCATION_ENTRY_BCI) { // This happens during inlining in a OSR method, because the same phase plan will be // used. return; } Debug.dump(graph, "OnStackReplacement initial"); EntryMarkerNode osr; do { NodeIterable<EntryMarkerNode> osrNodes = graph.getNodes(EntryMarkerNode.TYPE); osr = osrNodes.first(); if (osr == null) { throw new BailoutException("No OnStackReplacementNode generated"); } if (osrNodes.count() > 1) { throw new JVMCIError("Multiple OnStackReplacementNodes generated"); } if (osr.stateAfter().locksSize() != 0) { throw new BailoutException("OSR with locks not supported"); } if (osr.stateAfter().stackSize() != 0) { throw new BailoutException("OSR with stack entries not supported: %s", osr.stateAfter().toString(Verbosity.Debugger)); } LoopEx osrLoop = null; LoopsData loops = new LoopsData(graph); for (LoopEx loop : loops.loops()) { if (loop.inside().contains(osr)) { osrLoop = loop; break; } } if (osrLoop == null) { break; } LoopTransformations.peel(osrLoop); osr.replaceAtUsages(InputType.Guard, AbstractBeginNode.prevBegin((FixedNode) osr.predecessor())); for (Node usage : osr.usages().snapshot()) { ProxyNode proxy = (ProxyNode) usage; proxy.replaceAndDelete(proxy.value()); } GraphUtil.removeFixedWithUnusedInputs(osr); Debug.dump(graph, "OnStackReplacement loop peeling result"); } while (true); FrameState osrState = osr.stateAfter(); osr.setStateAfter(null); OSRStartNode osrStart = graph.add(new OSRStartNode()); StartNode start = graph.start(); FixedNode next = osr.next(); osr.setNext(null); osrStart.setNext(next); graph.setStart(osrStart); osrStart.setStateAfter(osrState); for (int i = 0; i < osrState.localsSize(); i++) { ValueNode value = osrState.localAt(i); if (value instanceof ProxyNode) { ProxyNode proxy = (ProxyNode) value; /* * we need to drop the stamp since the types we see during OSR may be too precise * (if a branch was not parsed for example). */ proxy.replaceAndDelete(graph.unique(new OSRLocalNode(i, proxy.stamp().unrestricted()))); } else { assert value == null || value instanceof OSRLocalNode; } } osr.replaceAtUsages(InputType.Guard, osrStart); assert osr.usages().isEmpty(); GraphUtil.killCFG(start); Debug.dump(graph, "OnStackReplacement result"); new DeadCodeEliminationPhase(Required).apply(graph); } }