1 /*
   2  * Copyright (c) 2016, 2018, 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 
  24 
  25 package org.graalvm.compiler.hotspot.nodes.aot;
  26 
  27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
  28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_16;
  29 
  30 import org.graalvm.compiler.graph.Node;
  31 import org.graalvm.compiler.graph.NodeClass;
  32 import org.graalvm.compiler.graph.spi.Canonicalizable;
  33 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  34 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  35 import org.graalvm.compiler.hotspot.word.KlassPointer;
  36 import org.graalvm.compiler.lir.LIRFrameState;
  37 import org.graalvm.compiler.nodeinfo.InputType;
  38 import org.graalvm.compiler.nodeinfo.NodeInfo;
  39 import org.graalvm.compiler.nodes.DeoptimizingNode;
  40 import org.graalvm.compiler.nodes.FrameState;
  41 import org.graalvm.compiler.nodes.NodeView;
  42 import org.graalvm.compiler.nodes.ValueNode;
  43 import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
  44 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  45 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  46 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  47 import org.graalvm.compiler.nodes.util.GraphUtil;
  48 import jdk.internal.vm.compiler.word.LocationIdentity;
  49 
  50 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
  51 import jdk.vm.ci.meta.Constant;
  52 import jdk.vm.ci.meta.Value;
  53 
  54 /**
  55  * A call to the VM via a regular stub.
  56  */
  57 @NodeInfo(allowedUsageTypes = {InputType.Memory}, cycles = CYCLES_UNKNOWN, size = SIZE_16)
  58 public class InitializeKlassStubCall extends AbstractMemoryCheckpoint implements LIRLowerable, Canonicalizable, DeoptimizingNode.DeoptBefore, MemoryCheckpoint.Single {
  59     public static final NodeClass<InitializeKlassStubCall> TYPE = NodeClass.create(InitializeKlassStubCall.class);
  60 
  61     @OptionalInput protected ValueNode value;
  62     @Input protected ValueNode string;
  63     @OptionalInput(InputType.State) protected FrameState stateBefore;
  64     protected Constant constant;
  65 
  66     protected InitializeKlassStubCall(ValueNode value, ValueNode string) {
  67         super(TYPE, value.stamp(NodeView.DEFAULT));
  68         this.value = value;
  69         this.string = string;
  70     }
  71 
  72     @NodeIntrinsic
  73     public static native KlassPointer initializeKlass(KlassPointer value, Object string);
  74 
  75     @Override
  76     public Node canonical(CanonicalizerTool tool) {
  77         if (value != null) {
  78             constant = GraphUtil.foldIfConstantAndRemove(this, value);
  79         }
  80         return this;
  81     }
  82 
  83     @Override
  84     public void generate(NodeLIRBuilderTool gen) {
  85         assert constant != null : "Expected the value to fold: " + value;
  86         Value stringValue = gen.operand(string);
  87         LIRFrameState fs = gen.state(this);
  88         assert fs != null : "Frame state should be set";
  89         assert constant instanceof HotSpotMetaspaceConstant;
  90         Value result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitKlassInitializationAndRetrieval(constant, stringValue, fs);
  91         gen.setResult(this, result);
  92     }
  93 
  94     @Override
  95     public boolean canDeoptimize() {
  96         return true;
  97     }
  98 
  99     @Override
 100     public LocationIdentity getLocationIdentity() {
 101         return LocationIdentity.any();
 102     }
 103 
 104     @Override
 105     public FrameState stateBefore() {
 106         return stateBefore;
 107     }
 108 
 109     @Override
 110     public void setStateBefore(FrameState f) {
 111         updateUsages(stateBefore, f);
 112         stateBefore = f;
 113     }
 114 }