Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/TailcallNode.java @ 18487:0f4813e0b4a9
Use asConstant() instead of asJavaConstant() where possible.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 24 Nov 2014 12:13:31 +0100 |
parents | c6086a18c9ce |
children | f57d86eb036f |
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/* * Copyright (c) 2011, 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.hotspot.nodes; import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.java.*; import com.oracle.graal.lir.gen.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; /** * Performs a tail call to the specified target compiled method, with the parameter taken from the * supplied FrameState. */ @NodeInfo public class TailcallNode extends FixedWithNextNode implements LIRLowerable { @Input(InputType.State) FrameState frameState; @Input 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 static TailcallNode create(ValueNode target, FrameState frameState) { return new TailcallNode(target, frameState); } protected TailcallNode(ValueNode target, FrameState frameState) { super(StampFactory.forVoid()); this.target = target; this.frameState = frameState; } public void generate(NodeLIRBuilderTool gen) { HotSpotVMConfig config = runtime().getConfig(); LIRGeneratorTool lirGen = gen.getLIRGeneratorTool(); ResolvedJavaMethod method = frameState.method(); boolean isStatic = method.isStatic(); JavaType[] signature = method.getSignature().toParameterTypes(isStatic ? null : method.getDeclaringClass()); CallingConvention cc = lirGen.getResult().getFrameMapBuilder().getRegisterConfig().getCallingConvention(CallingConvention.Type.JavaCall, null, signature, lirGen.target(), false); List<ValueNode> parameters = new ArrayList<>(); for (int i = 0, slot = 0; i < cc.getArgumentCount(); i++, slot += HIRFrameStateBuilder.stackSlots(frameState.localAt(slot).getKind())) { parameters.add(frameState.localAt(slot)); } Value[] args = gen.visitInvokeArguments(cc, parameters); Value address = lirGen.emitAddress(gen.operand(target), config.nmethodEntryOffset, Value.ILLEGAL, 0); Value entry = lirGen.emitLoad(LIRKind.value(Kind.Long), address, null); HotSpotLIRGenerator hsgen = (HotSpotLIRGenerator) gen; hsgen.emitTailcall(args, entry); } }