| /* |
| * 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 org.graalvm.compiler.hotspot.replacements; |
| |
| import org.graalvm.compiler.core.common.type.StampPair; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.graph.spi.Canonicalizable; |
| import org.graalvm.compiler.graph.spi.CanonicalizerTool; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.InvokeNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.replacements.nodes.MacroStateSplitNode; |
| |
| import jdk.vm.ci.hotspot.HotSpotObjectConstant; |
| import jdk.vm.ci.meta.Assumptions; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.MetaAccessProvider; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| @NodeInfo |
| public final class CallSiteTargetNode extends MacroStateSplitNode implements Canonicalizable, Lowerable { |
| |
| public static final NodeClass<CallSiteTargetNode> TYPE = NodeClass.create(CallSiteTargetNode.class); |
| |
| public CallSiteTargetNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, StampPair returnStamp, ValueNode receiver) { |
| super(TYPE, invokeKind, targetMethod, bci, returnStamp, receiver); |
| } |
| |
| private ValueNode getCallSite() { |
| return arguments.get(0); |
| } |
| |
| public static ConstantNode tryFold(ValueNode callSite, MetaAccessProvider metaAccess, Assumptions assumptions) { |
| if (callSite != null && callSite.isConstant() && !callSite.isNullConstant()) { |
| HotSpotObjectConstant c = (HotSpotObjectConstant) callSite.asConstant(); |
| JavaConstant target = c.getCallSiteTarget(assumptions); |
| if (target != null) { |
| return ConstantNode.forConstant(target, metaAccess); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| ConstantNode target = tryFold(getCallSite(), tool.getMetaAccess(), graph().getAssumptions()); |
| if (target != null) { |
| return target; |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| ConstantNode target = tryFold(getCallSite(), tool.getMetaAccess(), graph().getAssumptions()); |
| |
| if (target != null) { |
| graph().replaceFixedWithFloating(this, target); |
| } else { |
| InvokeNode invoke = createInvoke(); |
| graph().replaceFixedWithFixed(this, invoke); |
| invoke.lower(tool); |
| } |
| } |
| } |