Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/TailcallNode.java @ 6495:75f130f2b30f
moved AMD64 specific HotSpot code in com.oracle.graal.hotspot.amd64 project
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 03 Oct 2012 01:18:03 +0200 |
parents | 1f0edd29cc66 |
children | 2463eb24b644 |
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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.nodes; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.gen.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.java.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * Performs a tail call to the specified target compiled method, with the parameter taken from the supplied FrameState. */ public class TailcallNode extends FixedWithNextNode implements LIRLowerable { @Input private final FrameState frameState; @Input private final ValueNode target; /** * Creates a TailcallNode. * @param target points to the start of an nmethod * @param frameState the parameters will be taken from this FrameState */ public TailcallNode(ValueNode target, FrameState frameState) { super(StampFactory.forVoid()); this.target = target; this.frameState = frameState; } @Override public void generate(LIRGeneratorTool generator) { LIRGenerator gen = (LIRGenerator) generator; HotSpotVMConfig config = HotSpotGraalRuntime.getInstance().getConfig(); ResolvedJavaMethod method = frameState.method(); boolean isStatic = Modifier.isStatic(method.accessFlags()); Kind[] signature = MetaUtil.signatureToKinds(method.signature(), isStatic ? null : method.holder().kind()); CallingConvention cc = gen.frameMap().registerConfig.getCallingConvention(CallingConvention.Type.JavaCall, Kind.Void, signature, gen.target(), false); gen.frameMap().callsMethod(cc); // TODO (aw): I think this is unnecessary for a tail call. List<ValueNode> parameters = new ArrayList<>(); for (int i = 0, slot = 0; i < cc.getArgumentCount(); i++, slot += FrameStateBuilder.stackSlots(frameState.localAt(slot).kind())) { parameters.add(frameState.localAt(slot)); } Value[] args = gen.visitInvokeArguments(cc, parameters); Value entry = gen.emitLoad(new Address(Kind.Long, gen.operand(target), config.nmethodEntryOffset), false); HotSpotLIRGenerator hsgen = (HotSpotLIRGenerator) gen; hsgen.emitTailcall(args, entry); } }