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view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCacheImpl.java @ 19116:7227f5671c87
Prototype for folding object equality at parse time.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 04 Feb 2015 03:04:20 +0100 |
parents | c4cb2ccd0b96 |
children | 8ab925a6f724 |
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/* * Copyright (c) 2013, 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.truffle; import java.util.*; import java.util.Map.Entry; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; import com.oracle.graal.debug.Debug.Scope; import com.oracle.graal.graph.Graph.Mark; import com.oracle.graal.graph.*; import com.oracle.graal.graph.Node; import com.oracle.graal.graph.spi.*; import com.oracle.graal.java.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.util.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.phases.common.inlining.*; import com.oracle.graal.phases.tiers.*; import com.oracle.graal.phases.util.*; import com.oracle.graal.truffle.debug.*; import com.oracle.graal.truffle.phases.*; import com.oracle.graal.virtual.phases.ea.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.nodes.*; /** * Implementation of a cache for Truffle graphs for improving partial evaluation time. */ public class TruffleCacheImpl implements TruffleCache { private final Providers providers; private final GraphBuilderConfiguration config; private final OptimisticOptimizations optimisticOptimizations; private final HashMap<List<Object>, StructuredGraph> cache = new HashMap<>(); private final HashMap<List<Object>, Long> lastUsed = new HashMap<>(); private final StructuredGraph markerGraph = new StructuredGraph(); private final ResolvedJavaType stringBuilderClass; private final ResolvedJavaType runtimeExceptionClass; private final ResolvedJavaType errorClass; private final ResolvedJavaType controlFlowExceptionClass; private long counter; public TruffleCacheImpl(Providers providers, GraphBuilderConfiguration config, OptimisticOptimizations optimisticOptimizations) { this.providers = providers; this.config = config; this.optimisticOptimizations = optimisticOptimizations; this.stringBuilderClass = providers.getMetaAccess().lookupJavaType(StringBuilder.class); this.runtimeExceptionClass = providers.getMetaAccess().lookupJavaType(RuntimeException.class); this.errorClass = providers.getMetaAccess().lookupJavaType(Error.class); this.controlFlowExceptionClass = providers.getMetaAccess().lookupJavaType(ControlFlowException.class); } private static List<Object> computeCacheKey(ResolvedJavaMethod method, NodeInputList<ValueNode> arguments) { List<Object> key = new ArrayList<>(arguments.size() + 1); key.add(method); for (ValueNode v : arguments) { if (v.getKind() == Kind.Object) { key.add(v.stamp()); } } return key; } public StructuredGraph lookup(ResolvedJavaMethod method, NodeInputList<ValueNode> arguments, CanonicalizerPhase canonicalizer) { List<Object> key = computeCacheKey(method, arguments); StructuredGraph resultGraph = cache.get(key); if (resultGraph == markerGraph) { // compilation failed previously, don't try again return null; } StructuredGraph graph = cacheLookup(method, arguments, canonicalizer); assert graph != markerGraph : "markerGraph should not leak out"; return graph; } private StructuredGraph cacheLookup(ResolvedJavaMethod method, NodeInputList<ValueNode> arguments, CanonicalizerPhase canonicalizer) { if (method.getAnnotation(CompilerDirectives.TruffleBoundary.class) != null) { return null; } List<Object> key = computeCacheKey(method, arguments); StructuredGraph resultGraph = cache.get(key); if (resultGraph != null) { lastUsed.put(key, counter++); return resultGraph; } if (lastUsed.values().size() >= TruffleCompilerOptions.TruffleMaxCompilationCacheSize.getValue()) { lookupExceedsMaxSize(); } StructuredGraph graph; PhaseContext phaseContext = new PhaseContext(providers, new Assumptions(false)); try (Scope s = Debug.scope("TruffleCache", providers.getMetaAccess(), method)) { graph = parseGraph(method, phaseContext); if (graph == null) { return null; } } catch (Throwable e) { throw Debug.handle(e); } try (Scope s = Debug.scope("TruffleCache", providers.getMetaAccess(), method, graph)) { lastUsed.put(key, counter++); cache.put(key, markerGraph); for (ParameterNode param : graph.getNodes(ParameterNode.class)) { if (param.getKind() == Kind.Object) { ValueNode actualArgument = arguments.get(param.index()); param.setStamp(param.stamp().join(actualArgument.stamp())); } } // Intrinsify methods. new ReplaceIntrinsicsPhase(providers.getReplacements()).apply(graph); // Convert deopt to guards. new ConvertDeoptimizeToGuardPhase().apply(graph); PartialEscapePhase partialEscapePhase = new PartialEscapePhase(false, canonicalizer); Mark mark = null; while (true) { partialEscapePhase.apply(graph, phaseContext); // Conditional elimination. ConditionalEliminationPhase conditionalEliminationPhase = new ConditionalEliminationPhase(); conditionalEliminationPhase.apply(graph); // Canonicalize / constant propagate. canonicalizer.apply(graph, phaseContext); boolean inliningProgress = false; for (MethodCallTargetNode methodCallTarget : graph.getNodes(MethodCallTargetNode.class)) { if (!graph.getMark().equals(mark)) { mark = lookupProcessMacroSubstitutions(graph, mark); } if (methodCallTarget.isAlive() && methodCallTarget.invoke() != null && shouldInline(methodCallTarget)) { inliningProgress = true; lookupDoInline(graph, phaseContext, canonicalizer, methodCallTarget); } } // Convert deopt to guards. new ConvertDeoptimizeToGuardPhase().apply(graph); new EarlyReadEliminationPhase(canonicalizer).apply(graph, phaseContext); if (!inliningProgress) { break; } } if (TruffleCompilerOptions.TraceTrufflePerformanceWarnings.getValue()) { int warnNodeCount = TruffleCompilerOptions.TrufflePerformanceWarningGraalNodeCount.getValue(); if (graph.getNodeCount() > warnNodeCount) { Map<String, Object> map = new LinkedHashMap<>(); map.put("nodeCount", graph.getNodeCount()); map.put("method", method.toString()); TracePerformanceWarningsListener.logPerformanceWarning(String.format("Method on fast path contains more than %d graal nodes.", warnNodeCount), map); try (Scope s2 = Debug.scope("TrufflePerformanceWarnings")) { Debug.dump(graph, "performance warning"); } } } cache.put(key, graph); if (TruffleCompilerOptions.TraceTruffleCacheDetails.getValue()) { TTY.println(String.format("[truffle] added to graph cache method %s with %d nodes.", method, graph.getNodeCount())); } return graph; } catch (Throwable e) { throw Debug.handle(e); } } private void lookupExceedsMaxSize() { List<Long> lastUsedList = new ArrayList<>(); for (long l : lastUsed.values()) { lastUsedList.add(l); } Collections.sort(lastUsedList); long mid = lastUsedList.get(lastUsedList.size() / 2); List<List<Object>> toRemoveList = new ArrayList<>(); for (Entry<List<Object>, Long> entry : lastUsed.entrySet()) { if (entry.getValue() < mid) { toRemoveList.add(entry.getKey()); } } for (List<Object> entry : toRemoveList) { cache.remove(entry); lastUsed.remove(entry); } } private Mark lookupProcessMacroSubstitutions(StructuredGraph graph, Mark mark) { // Make sure macro substitutions such as // CompilerDirectives.transferToInterpreter get processed first. for (Node newNode : graph.getNewNodes(mark)) { if (newNode instanceof MethodCallTargetNode) { MethodCallTargetNode methodCallTargetNode = (MethodCallTargetNode) newNode; Class<? extends FixedWithNextNode> macroSubstitution = providers.getReplacements().getMacroSubstitution(methodCallTargetNode.targetMethod()); if (macroSubstitution != null) { InliningUtil.inlineMacroNode(methodCallTargetNode.invoke(), methodCallTargetNode.targetMethod(), macroSubstitution); } else { tryCutOffRuntimeExceptionsAndErrors(methodCallTargetNode); } } } return graph.getMark(); } private void lookupDoInline(StructuredGraph graph, PhaseContext phaseContext, CanonicalizerPhase canonicalizer, MethodCallTargetNode methodCallTarget) { List<Node> canonicalizerUsages = new ArrayList<>(); for (Node n : methodCallTarget.invoke().asNode().usages()) { if (n instanceof Canonicalizable) { canonicalizerUsages.add(n); } } List<ValueNode> argumentSnapshot = methodCallTarget.arguments().snapshot(); Mark beforeInvokeMark = graph.getMark(); expandInvoke(methodCallTarget, canonicalizer); for (Node arg : argumentSnapshot) { if (arg != null) { for (Node argUsage : arg.usages()) { if (graph.isNew(beforeInvokeMark, argUsage) && argUsage instanceof Canonicalizable) { canonicalizerUsages.add(argUsage); } } } } canonicalizer.applyIncremental(graph, phaseContext, canonicalizerUsages); } protected StructuredGraph parseGraph(final ResolvedJavaMethod method, final PhaseContext phaseContext) { final StructuredGraph graph = new StructuredGraph(method); new GraphBuilderPhase.Instance(phaseContext.getMetaAccess(), phaseContext.getStampProvider(), phaseContext.getAssumptions(), null, config, optimisticOptimizations).apply(graph); return graph; } private void expandInvoke(MethodCallTargetNode methodCallTargetNode, CanonicalizerPhase canonicalizer) { StructuredGraph inlineGraph = providers.getReplacements().getMethodSubstitution(methodCallTargetNode.targetMethod()); if (inlineGraph == null) { inlineGraph = cacheLookup(methodCallTargetNode.targetMethod(), methodCallTargetNode.arguments(), canonicalizer); } if (inlineGraph == null) { return; } if (inlineGraph == this.markerGraph) { // Can happen for recursive calls. throw GraphUtil.approxSourceException(methodCallTargetNode, new IllegalStateException("Found illegal recursive call to " + methodCallTargetNode.targetMethod() + ", must annotate such calls with @TruffleBoundary!")); } Invoke invoke = methodCallTargetNode.invoke(); InliningUtil.inline(invoke, inlineGraph, true, null); } private boolean tryCutOffRuntimeExceptionsAndErrors(MethodCallTargetNode methodCallTargetNode) { if (methodCallTargetNode.targetMethod().isConstructor()) { ResolvedJavaType declaringClass = methodCallTargetNode.targetMethod().getDeclaringClass(); ResolvedJavaType exceptionType = Objects.requireNonNull(StampTool.typeOrNull(methodCallTargetNode.receiver().stamp())); boolean removeAllocation = runtimeExceptionClass.isAssignableFrom(declaringClass) || errorClass.isAssignableFrom(declaringClass); boolean isControlFlowException = controlFlowExceptionClass.isAssignableFrom(exceptionType); if (removeAllocation && !isControlFlowException) { DeoptimizeNode deoptNode = methodCallTargetNode.graph().add(new DeoptimizeNode(DeoptimizationAction.InvalidateRecompile, DeoptimizationReason.UnreachedCode)); FixedNode invokeNode = methodCallTargetNode.invoke().asNode(); invokeNode.replaceAtPredecessor(deoptNode); GraphUtil.killCFG(invokeNode); return true; } } return false; } protected boolean shouldInline(MethodCallTargetNode methodCallTargetNode) { boolean result = methodCallTargetNode.invokeKind().isDirect() && methodCallTargetNode.targetMethod().hasBytecodes() && methodCallTargetNode.targetMethod().canBeInlined() && methodCallTargetNode.targetMethod().getAnnotation(ExplodeLoop.class) == null && methodCallTargetNode.targetMethod().getAnnotation(CompilerDirectives.TruffleBoundary.class) == null && !methodCallTargetNode.targetMethod().getDeclaringClass().equals(stringBuilderClass); return result; } }