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package org.graalvm.compiler.nodes.java;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;

import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodeinfo.NodeSize;
import org.graalvm.compiler.nodeinfo.Verbosity;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.Lowerable;

import jdk.vm.ci.meta.ResolvedJavaField;

The base class of all instructions that access fields.
/** * The base class of all instructions that access fields. */
@NodeInfo(cycles = CYCLES_2, size = SIZE_1) public abstract class AccessFieldNode extends FixedWithNextNode implements Lowerable { public static final NodeClass<AccessFieldNode> TYPE = NodeClass.create(AccessFieldNode.class); @OptionalInput ValueNode object; protected final ResolvedJavaField field; protected final boolean volatileAccess; public ValueNode object() { return object; }
Constructs a new access field object.
Params:
  • object – the instruction producing the receiver object
  • field – the compiler interface representation of the field
  • volatileAccess – specifies if the access is volatile or not, this overrides the field volatile modifier.
/** * Constructs a new access field object. * * @param object the instruction producing the receiver object * @param field the compiler interface representation of the field * @param volatileAccess specifies if the access is volatile or not, this overrides the field * volatile modifier. */
public AccessFieldNode(NodeClass<? extends AccessFieldNode> c, Stamp stamp, ValueNode object, ResolvedJavaField field, boolean volatileAccess) { super(c, stamp); this.object = object; this.field = field; this.volatileAccess = volatileAccess; }
Constructs a new access field object.
Params:
  • object – the instruction producing the receiver object
  • field – the compiler interface representation of the field
/** * Constructs a new access field object. * * @param object the instruction producing the receiver object * @param field the compiler interface representation of the field */
public AccessFieldNode(NodeClass<? extends AccessFieldNode> c, Stamp stamp, ValueNode object, ResolvedJavaField field) { this(c, stamp, object, field, field.isVolatile()); }
Gets the compiler interface field for this field access.
Returns:the compiler interface field for this field access
/** * Gets the compiler interface field for this field access. * * @return the compiler interface field for this field access */
public ResolvedJavaField field() { return field; }
Checks whether this field access is an access to a static field.
Returns:true if this field access is to a static field
/** * Checks whether this field access is an access to a static field. * * @return {@code true} if this field access is to a static field */
public boolean isStatic() { return field.isStatic(); }
Checks whether this access has volatile semantics. The field access semantics are coupled to the access and not to the field. e.g. it's possible to access volatile fields using non-volatile semantics via VarHandles.
/** * Checks whether this access has volatile semantics. * * The field access semantics are coupled to the access and not to the field. e.g. it's possible * to access volatile fields using non-volatile semantics via VarHandles. */
public boolean isVolatile() { return volatileAccess; } @Override public String toString(Verbosity verbosity) { if (verbosity == Verbosity.Name) { return super.toString(verbosity) + "#" + field.getName(); } else { return super.toString(verbosity); } } @Override public boolean verify() { assertTrue((object == null) == isStatic(), "static field must not have object, instance field must have object"); return super.verify(); } @Override public NodeSize estimatedNodeSize() { if (isVolatile()) { return SIZE_2; } return super.estimatedNodeSize(); } }