--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases.common/src/org/graalvm/compiler/phases/common/inlining/policy/GreedyInliningPolicy.java 2017-02-15 17:08:18.770016121 -0800 @@ -0,0 +1,121 @@ +/* + * 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 org.graalvm.compiler.phases.common.inlining.policy; + +import static org.graalvm.compiler.core.common.GraalOptions.InlineEverything; +import static org.graalvm.compiler.core.common.GraalOptions.LimitInlinedInvokes; +import static org.graalvm.compiler.core.common.GraalOptions.MaximumDesiredSize; +import static org.graalvm.compiler.core.common.GraalOptions.MaximumInliningSize; +import static org.graalvm.compiler.core.common.GraalOptions.SmallCompiledLowLevelGraphSize; +import static org.graalvm.compiler.core.common.GraalOptions.TrivialInliningSize; + +import java.util.Map; + +import org.graalvm.compiler.debug.Debug; +import org.graalvm.compiler.debug.DebugCounter; +import org.graalvm.compiler.nodes.Invoke; +import org.graalvm.compiler.nodes.StructuredGraph; +import org.graalvm.compiler.nodes.spi.Replacements; +import org.graalvm.compiler.phases.common.inlining.InliningUtil; +import org.graalvm.compiler.phases.common.inlining.info.InlineInfo; +import org.graalvm.compiler.phases.common.inlining.walker.MethodInvocation; + +public class GreedyInliningPolicy extends AbstractInliningPolicy { + + private static final DebugCounter inliningStoppedByMaxDesiredSizeCounter = Debug.counter("InliningStoppedByMaxDesiredSize"); + + public GreedyInliningPolicy(Map hints) { + super(hints); + } + + @Override + public boolean continueInlining(StructuredGraph currentGraph) { + if (InliningUtil.getNodeCount(currentGraph) >= MaximumDesiredSize.getValue()) { + InliningUtil.logInliningDecision("inlining is cut off by MaximumDesiredSize"); + inliningStoppedByMaxDesiredSizeCounter.increment(); + return false; + } + return true; + } + + @Override + public boolean isWorthInlining(Replacements replacements, MethodInvocation invocation, int inliningDepth, boolean fullyProcessed) { + + final InlineInfo info = invocation.callee(); + final double probability = invocation.probability(); + final double relevance = invocation.relevance(); + + if (InlineEverything.getValue()) { + InliningUtil.logInlinedMethod(info, inliningDepth, fullyProcessed, "inline everything"); + return true; + } + + if (isIntrinsic(replacements, info)) { + InliningUtil.logInlinedMethod(info, inliningDepth, fullyProcessed, "intrinsic"); + return true; + } + + if (info.shouldInline()) { + InliningUtil.logInlinedMethod(info, inliningDepth, fullyProcessed, "forced inlining"); + return true; + } + + double inliningBonus = getInliningBonus(info); + int nodes = info.determineNodeCount(); + int lowLevelGraphSize = previousLowLevelGraphSize(info); + + if (SmallCompiledLowLevelGraphSize.getValue() > 0 && lowLevelGraphSize > SmallCompiledLowLevelGraphSize.getValue() * inliningBonus) { + InliningUtil.logNotInlinedMethod(info, inliningDepth, "too large previous low-level graph (low-level-nodes: %d, relevance=%f, probability=%f, bonus=%f, nodes=%d)", lowLevelGraphSize, + relevance, probability, inliningBonus, nodes); + return false; + } + + if (nodes < TrivialInliningSize.getValue() * inliningBonus) { + InliningUtil.logInlinedMethod(info, inliningDepth, fullyProcessed, "trivial (relevance=%f, probability=%f, bonus=%f, nodes=%d)", relevance, probability, inliningBonus, nodes); + return true; + } + + /* + * TODO (chaeubl): invoked methods that are on important paths but not yet compiled -> will + * be compiled anyways and it is likely that we are the only caller... might be useful to + * inline those methods but increases bootstrap time (maybe those methods are also getting + * queued in the compilation queue concurrently) + */ + double invokes = determineInvokeProbability(info); + if (LimitInlinedInvokes.getValue() > 0 && fullyProcessed && invokes > LimitInlinedInvokes.getValue() * inliningBonus) { + InliningUtil.logNotInlinedMethod(info, inliningDepth, "callee invoke probability is too high (invokeP=%f, relevance=%f, probability=%f, bonus=%f, nodes=%d)", invokes, relevance, + probability, inliningBonus, nodes); + return false; + } + + double maximumNodes = computeMaximumSize(relevance, (int) (MaximumInliningSize.getValue() * inliningBonus)); + if (nodes <= maximumNodes) { + InliningUtil.logInlinedMethod(info, inliningDepth, fullyProcessed, "relevance-based (relevance=%f, probability=%f, bonus=%f, nodes=%d <= %f)", relevance, probability, inliningBonus, + nodes, maximumNodes); + return true; + } + + InliningUtil.logNotInlinedMethod(info, inliningDepth, "relevance-based (relevance=%f, probability=%f, bonus=%f, nodes=%d > %f)", relevance, probability, inliningBonus, nodes, maximumNodes); + return false; + } +}