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view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/objects/instancevariables/ReadInstanceVariableNode.java @ 13853:f11d3d5248b5
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author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 31 Jan 2014 16:36:02 -0800 |
parents | 0fbee3eb71f0 |
children |
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/* * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This * code is released under a tri EPL/GPL/LGPL license. You can use it, * redistribute it and/or modify it under the terms of the: * * Eclipse Public License version 1.0 * GNU General Public License version 2 * GNU Lesser General Public License version 2.1 */ package com.oracle.truffle.ruby.nodes.objects.instancevariables; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.runtime.*; import com.oracle.truffle.ruby.runtime.objects.*; public abstract class ReadInstanceVariableNode extends RubyNode implements ReadNode { protected final String name; @Child protected RubyNode receiver; public ReadInstanceVariableNode(RubyContext context, SourceSection sourceSection, String name, RubyNode receiver) { super(context, sourceSection); this.name = name; this.receiver = adoptChild(receiver); } public ReadInstanceVariableNode respecialize(RubyBasicObject receiverObject) { final StorageLocation storageLocation = receiverObject.getUpdatedObjectLayout().findStorageLocation(name); if (storageLocation == null) { return new ReadMissingInstanceVariableNode(getSourceSection(), name, receiver, receiverObject.getObjectLayout(), getContext()); } if (storageLocation instanceof FixnumStorageLocation) { return new ReadFixnumInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (FixnumStorageLocation) storageLocation); } else if (storageLocation instanceof FloatStorageLocation) { return new ReadFloatInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (FloatStorageLocation) storageLocation); } else { return new ReadObjectInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (ObjectStorageLocation) storageLocation); } } public WriteInstanceVariableNode makeWriteNode(RubyNode rhs) { return new UninitializedWriteInstanceVariableNode(getContext(), getEncapsulatingSourceSection(), name, (RubyNode) receiver.copy(), rhs); } public String getName() { return name; } public RubyNode getReceiver() { return receiver; } @Override public Object isDefined(VirtualFrame frame) { final RubyContext context = getContext(); try { final Object receiverObject = receiver.execute(frame); final RubyBasicObject receiverRubyObject = context.getCoreLibrary().box(receiverObject); final ObjectLayout layout = receiverRubyObject.getObjectLayout(); final StorageLocation storageLocation = layout.findStorageLocation(name); if (storageLocation.isSet(receiverRubyObject)) { return context.makeString("instance-variable"); } else { return NilPlaceholder.INSTANCE; } } catch (Exception e) { return NilPlaceholder.INSTANCE; } } }