1 /* 2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot.replacements; 24 25 import org.graalvm.compiler.core.common.type.StampPair; 26 import org.graalvm.compiler.graph.Node; 27 import org.graalvm.compiler.graph.NodeClass; 28 import org.graalvm.compiler.graph.spi.Canonicalizable; 29 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 30 import org.graalvm.compiler.nodeinfo.NodeInfo; 31 import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind; 32 import org.graalvm.compiler.nodes.ConstantNode; 33 import org.graalvm.compiler.nodes.InvokeNode; 34 import org.graalvm.compiler.nodes.ValueNode; 35 import org.graalvm.compiler.nodes.spi.Lowerable; 36 import org.graalvm.compiler.nodes.spi.LoweringTool; 37 import org.graalvm.compiler.replacements.nodes.MacroStateSplitNode; 38 39 import jdk.vm.ci.hotspot.HotSpotObjectConstant; 40 import jdk.vm.ci.meta.Assumptions; 41 import jdk.vm.ci.meta.JavaConstant; 42 import jdk.vm.ci.meta.MetaAccessProvider; 43 import jdk.vm.ci.meta.ResolvedJavaMethod; 44 45 @NodeInfo 46 public final class CallSiteTargetNode extends MacroStateSplitNode implements Canonicalizable, Lowerable { 47 48 public static final NodeClass<CallSiteTargetNode> TYPE = NodeClass.create(CallSiteTargetNode.class); 49 50 public CallSiteTargetNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, StampPair returnStamp, ValueNode receiver) { 51 super(TYPE, invokeKind, targetMethod, bci, returnStamp, receiver); 52 } 53 54 private ValueNode getCallSite() { 55 return arguments.get(0); 56 } 57 58 public static ConstantNode tryFold(ValueNode callSite, MetaAccessProvider metaAccess, Assumptions assumptions) { 59 if (callSite != null && callSite.isConstant() && !callSite.isNullConstant()) { 60 HotSpotObjectConstant c = (HotSpotObjectConstant) callSite.asConstant(); 61 JavaConstant target = c.getCallSiteTarget(assumptions); 62 if (target != null) { 63 return ConstantNode.forConstant(target, metaAccess); 64 } 65 } 66 return null; 67 } 68 69 @Override 70 public Node canonical(CanonicalizerTool tool) { 71 ConstantNode target = tryFold(getCallSite(), tool.getMetaAccess(), graph().getAssumptions()); 72 if (target != null) { 73 return target; 74 } 75 76 return this; 77 } 78 79 @Override 80 public void lower(LoweringTool tool) { 81 ConstantNode target = tryFold(getCallSite(), tool.getMetaAccess(), graph().getAssumptions()); 82 83 if (target != null) { 84 graph().replaceFixedWithFloating(this, target); 85 } else { 86 InvokeNode invoke = createInvoke(); 87 graph().replaceFixedWithFixed(this, invoke); 88 invoke.lower(tool); 89 } 90 } 91 }