Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/MacroNode.java @ 17450:45b45f902bed
removed Node generation (GRAAL-857)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 15 Oct 2014 15:35:33 +0200 |
parents | c9bb0da795d4 |
children | 16e61bb57e90 |
line wrap: on
line source
/* * 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.replacements.nodes; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.debug.*; import com.oracle.graal.debug.Debug.Scope; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.CallTargetNode.InvokeKind; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.StructuredGraph.GuardsStage; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.phases.common.inlining.*; import com.oracle.graal.phases.tiers.*; import com.oracle.graal.replacements.*; /** * Macro nodes can be used to temporarily replace an invoke (usually by using the * {@link MacroSubstitution} annotation). They can, for example, be used to implement constant * folding for known JDK functions like {@link Class#isInterface()}.<br/> * <br/> * During lowering, multiple sources are queried in order to look for a replacement: * <ul> * <li>If {@link #getLoweredSnippetGraph(LoweringTool)} returns a non-null result, this graph is * used as a replacement.</li> * <li>If a {@link MethodSubstitution} for the target method is found, this substitution is used as * a replacement.</li> * <li>Otherwise, the macro node is replaced with an {@link InvokeNode}. Note that this is only * possible if the macro node is a {@link MacroStateSplitNode}.</li> * </ul> */ @NodeInfo public class MacroNode extends FixedWithNextNode implements Lowerable { @Input protected NodeInputList<ValueNode> arguments; protected final int bci; protected final ResolvedJavaMethod targetMethod; protected final JavaType returnType; protected final InvokeKind invokeKind; public static MacroNode create(Invoke invoke) { return new MacroNode(invoke); } protected MacroNode(Invoke invoke) { super(StampFactory.forKind(((MethodCallTargetNode) invoke.callTarget()).targetMethod().getSignature().getReturnKind())); MethodCallTargetNode methodCallTarget = (MethodCallTargetNode) invoke.callTarget(); this.arguments = new NodeInputList<>(this, methodCallTarget.arguments()); this.bci = invoke.bci(); this.targetMethod = methodCallTarget.targetMethod(); this.returnType = methodCallTarget.returnType(); this.invokeKind = methodCallTarget.invokeKind(); } public int getBci() { return bci; } public ResolvedJavaMethod getTargetMethod() { return targetMethod; } public JavaType getReturnType() { return returnType; } protected FrameState stateAfter() { return null; } /** * Gets a snippet to be used for lowering this macro node. The returned graph (if non-null) must * have been {@linkplain #lowerReplacement(StructuredGraph, LoweringTool) lowered}. */ @SuppressWarnings("unused") protected StructuredGraph getLoweredSnippetGraph(LoweringTool tool) { return null; } /** * Gets a normal method substitution to be used for lowering this macro node. This is only * called if {@link #getLoweredSnippetGraph(LoweringTool)} returns null. The returned graph (if * non-null) must have been {@linkplain #lowerReplacement(StructuredGraph, LoweringTool) * lowered}. */ protected StructuredGraph getLoweredSubstitutionGraph(LoweringTool tool) { StructuredGraph methodSubstitution = tool.getReplacements().getMethodSubstitution(getTargetMethod()); if (methodSubstitution != null) { methodSubstitution = methodSubstitution.copy(); if (stateAfter() == null || stateAfter().bci == BytecodeFrame.AFTER_BCI) { /* * handles the case of a MacroNode inside a snippet used for another MacroNode * lowering */ new CollapseFrameForSingleSideEffectPhase().apply(methodSubstitution); } return lowerReplacement(methodSubstitution, tool); } return null; } /** * Applies {@linkplain LoweringPhase lowering} to a replacement graph. * * @param replacementGraph a replacement (i.e., snippet or method substitution) graph */ protected StructuredGraph lowerReplacement(final StructuredGraph replacementGraph, LoweringTool tool) { final PhaseContext c = new PhaseContext(tool.getMetaAccess(), tool.getConstantReflection(), tool.getLowerer(), tool.getReplacements(), tool.assumptions()); if (!graph().hasValueProxies()) { new RemoveValueProxyPhase().apply(replacementGraph); } GuardsStage guardsStage = graph().getGuardsStage(); if (guardsStage.ordinal() >= GuardsStage.FIXED_DEOPTS.ordinal()) { new GuardLoweringPhase().apply(replacementGraph, null); if (guardsStage.ordinal() >= GuardsStage.AFTER_FSA.ordinal()) { new FrameStateAssignmentPhase().apply(replacementGraph); } } try (Scope s = Debug.scope("LoweringSnippetTemplate", replacementGraph)) { new LoweringPhase(new CanonicalizerPhase(true), tool.getLoweringStage()).apply(replacementGraph, c); } catch (Throwable e) { throw Debug.handle(e); } return replacementGraph; } @Override public void lower(LoweringTool tool) { StructuredGraph replacementGraph = getLoweredSnippetGraph(tool); if (replacementGraph == null) { replacementGraph = getLoweredSubstitutionGraph(tool); } InvokeNode invoke = replaceWithInvoke(); assert invoke.verify(); if (replacementGraph != null) { // Pull out the receiver null check so that a replaced // receiver can be lowered if necessary if (!targetMethod.isStatic()) { ValueNode nonNullReceiver = InliningUtil.nonNullReceiver(invoke); if (nonNullReceiver instanceof Lowerable) { ((Lowerable) nonNullReceiver).lower(tool); } } InliningUtil.inline(invoke, replacementGraph, false, null); Debug.dump(graph(), "After inlining replacement %s", replacementGraph); } else { if (stateAfter() == null) { throw new GraalInternalError("cannot lower to invoke without state: %s", this); } invoke.lower(tool); } } protected InvokeNode replaceWithInvoke() { InvokeNode invoke = createInvoke(); graph().replaceFixedWithFixed(this, invoke); return invoke; } protected InvokeNode createInvoke() { MethodCallTargetNode callTarget = graph().add(MethodCallTargetNode.create(invokeKind, targetMethod, arguments.toArray(new ValueNode[arguments.size()]), returnType)); InvokeNode invoke = graph().add(InvokeNode.create(callTarget, bci)); if (stateAfter() != null) { invoke.setStateAfter(stateAfter().duplicate()); if (getKind() != Kind.Void) { invoke.stateAfter().replaceFirstInput(this, invoke); } } return invoke; } }