1 /*
   2  * Copyright (c) 2016, 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.nodes.aot;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_3;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_3;
  27 
  28 import org.graalvm.compiler.core.common.PermanentBailoutException;
  29 import org.graalvm.compiler.graph.Node;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.graph.spi.Canonicalizable;
  32 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  33 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  34 import org.graalvm.compiler.hotspot.meta.HotSpotConstantLoadAction;
  35 import org.graalvm.compiler.hotspot.word.KlassPointer;
  36 import org.graalvm.compiler.hotspot.word.MethodPointer;
  37 import org.graalvm.compiler.nodeinfo.NodeInfo;
  38 import org.graalvm.compiler.nodes.FixedWithNextNode;
  39 import org.graalvm.compiler.nodes.ValueNode;
  40 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  41 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  42 import org.graalvm.compiler.nodes.util.GraphUtil;
  43 
  44 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
  45 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
  46 import jdk.vm.ci.meta.Constant;
  47 import jdk.vm.ci.meta.Value;
  48 
  49 @NodeInfo(cycles = CYCLES_3, size = SIZE_3)
  50 public class LoadConstantIndirectlyFixedNode extends FixedWithNextNode implements Canonicalizable, LIRLowerable {
  51 
  52     public static final NodeClass<LoadConstantIndirectlyFixedNode> TYPE = NodeClass.create(LoadConstantIndirectlyFixedNode.class);
  53 
  54     @OptionalInput protected ValueNode value;
  55     protected Constant constant;
  56     protected HotSpotConstantLoadAction action;
  57 
  58     public LoadConstantIndirectlyFixedNode(ValueNode value) {
  59         super(TYPE, value.stamp());
  60         this.value = value;
  61         this.constant = null;
  62         this.action = HotSpotConstantLoadAction.RESOLVE;
  63     }
  64 
  65     public LoadConstantIndirectlyFixedNode(ValueNode value, HotSpotConstantLoadAction action) {
  66         super(TYPE, value.stamp());
  67         this.value = value;
  68         this.constant = null;
  69         this.action = action;
  70     }
  71 
  72     @Override
  73     public Node canonical(CanonicalizerTool tool) {
  74         if (value != null) {
  75             constant = GraphUtil.foldIfConstantAndRemove(this, value);
  76         }
  77         return this;
  78     }
  79 
  80     @Override
  81     public void generate(NodeLIRBuilderTool gen) {
  82         assert constant != null : "Expected the value to fold: " + value;
  83         Value result;
  84         if (constant instanceof HotSpotObjectConstant) {
  85             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadObjectAddress(constant);
  86         } else if (constant instanceof HotSpotMetaspaceConstant) {
  87             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadMetaspaceAddress(constant, action);
  88         } else {
  89             throw new PermanentBailoutException("Unsupported constant type: " + constant);
  90         }
  91         gen.setResult(this, result);
  92     }
  93 
  94     @NodeIntrinsic
  95     public static native KlassPointer loadKlass(KlassPointer klassPointer, @ConstantNodeParameter HotSpotConstantLoadAction action);
  96 
  97     @NodeIntrinsic
  98     public static native KlassPointer loadKlass(KlassPointer klassPointer);
  99 
 100     @NodeIntrinsic
 101     public static native MethodPointer loadMethod(MethodPointer klassPointer);
 102 
 103     @NodeIntrinsic
 104     public static native Object loadObject(Object object);
 105 
 106 }