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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.HotSpotMetaspaceConstant;
47 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
48 import jdk.vm.ci.meta.Constant;
49 import jdk.vm.ci.meta.Value;
50 
51 @NodeInfo(cycles = CYCLES_4, size = SIZE_1)
52 public class LoadConstantIndirectlyNode extends FloatingNode implements Canonicalizable, LIRLowerable {
53 
54     public static final NodeClass<LoadConstantIndirectlyNode> TYPE = NodeClass.create(LoadConstantIndirectlyNode.class);
55 
56     @OptionalInput protected ValueNode value;
57     protected Constant constant;
58     protected HotSpotConstantLoadAction action;
59 
LoadConstantIndirectlyNode(ValueNode value)60     public LoadConstantIndirectlyNode(ValueNode value) {
61         super(TYPE, value.stamp(NodeView.DEFAULT));
62         this.value = value;
63         this.constant = null;
64         this.action = HotSpotConstantLoadAction.RESOLVE;
65     }
66 
LoadConstantIndirectlyNode(ValueNode value, HotSpotConstantLoadAction action)67     public LoadConstantIndirectlyNode(ValueNode value, HotSpotConstantLoadAction action) {
68         super(TYPE, value.stamp(NodeView.DEFAULT));
69         this.value = value;
70         this.constant = null;
71         this.action = action;
72     }
73 
74     @Override
canonical(CanonicalizerTool tool)75     public Node canonical(CanonicalizerTool tool) {
76         if (value != null) {
77             constant = GraphUtil.foldIfConstantAndRemove(this, value);
78         }
79         return this;
80     }
81 
82     @Override
generate(NodeLIRBuilderTool gen)83     public void generate(NodeLIRBuilderTool gen) {
84         assert constant != null : "Expected the value to fold: " + value;
85         Value result;
86         if (constant instanceof HotSpotObjectConstant) {
87             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadObjectAddress(constant);
88         } else if (constant instanceof HotSpotMetaspaceConstant) {
89             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLoadMetaspaceAddress(constant, action);
90         } else {
91             throw new PermanentBailoutException("Unsupported constant type: " + constant);
92         }
93         gen.setResult(this, result);
94     }
95 
96     @NodeIntrinsic
loadKlass(KlassPointer klassPointer, @ConstantNodeParameter HotSpotConstantLoadAction action)97     public static native KlassPointer loadKlass(KlassPointer klassPointer, @ConstantNodeParameter HotSpotConstantLoadAction action);
98 
99     @NodeIntrinsic
loadKlass(KlassPointer klassPointer)100     public static native KlassPointer loadKlass(KlassPointer klassPointer);
101 
102     @NodeIntrinsic
loadObject(Object object)103     public static native Object loadObject(Object object);
104 
105 }
106