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_4;
  28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
  29 
  30 import org.graalvm.compiler.core.common.PermanentBailoutException;
  31 import org.graalvm.compiler.graph.Node;
  32 import org.graalvm.compiler.graph.NodeClass;
  33 import org.graalvm.compiler.graph.spi.Canonicalizable;
  34 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  35 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  36 import org.graalvm.compiler.hotspot.meta.HotSpotConstantLoadAction;
  37 import org.graalvm.compiler.hotspot.word.KlassPointer;
  38 import org.graalvm.compiler.nodeinfo.NodeInfo;
  39 import org.graalvm.compiler.nodes.NodeView;
  40 import org.graalvm.compiler.nodes.ValueNode;
  41 import org.graalvm.compiler.nodes.calc.FloatingNode;
  42 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  43 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  44 import org.graalvm.compiler.nodes.util.GraphUtil;
  45 
  46 import jdk.vm.ci.hotspot.HotSpotConstantPoolObject;
  47 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
  48 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
  49 import jdk.vm.ci.meta.Constant;
  50 import jdk.vm.ci.meta.Value;
  51 
  52 @NodeInfo(cycles = CYCLES_4, size = SIZE_1)
  53 public class LoadConstantIndirectlyNode extends FloatingNode implements Canonicalizable, LIRLowerable {
  54 
  55     public static final NodeClass<LoadConstantIndirectlyNode> TYPE = NodeClass.create(LoadConstantIndirectlyNode.class);
  56 
  57     @OptionalInput protected ValueNode value;
  58     protected Constant constant;
  59     protected HotSpotConstantLoadAction action;
  60 
  61     public LoadConstantIndirectlyNode(ValueNode value) {
  62         super(TYPE, value.stamp(NodeView.DEFAULT));
  63         this.value = value;
  64         this.constant = null;
  65         this.action = HotSpotConstantLoadAction.RESOLVE;
  66     }
  67 
  68     public LoadConstantIndirectlyNode(ValueNode value, HotSpotConstantLoadAction action) {
  69         super(TYPE, value.stamp(NodeView.DEFAULT));
  70         this.value = value;
  71         this.constant = null;
  72         this.action = action;
  73     }
  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 result;
  87         if (constant instanceof HotSpotObjectConstant || constant instanceof HotSpotConstantPoolObject) {
  88             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadObjectAddress(constant);
  89         } else if (constant instanceof HotSpotMetaspaceConstant) {
  90             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadMetaspaceAddress(constant, action);
  91         } else {
  92             throw new PermanentBailoutException("Unsupported constant type: " + constant);
  93         }
  94         gen.setResult(this, result);
  95     }
  96 
  97     @NodeIntrinsic
  98     public static native KlassPointer loadKlass(KlassPointer klassPointer, @ConstantNodeParameter HotSpotConstantLoadAction action);
  99 
 100     @NodeIntrinsic
 101     public static native KlassPointer loadKlass(KlassPointer klassPointer);
 102 
 103     @NodeIntrinsic
 104     public static native Object loadObject(Object object);
 105 
 106 }