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comparison graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/call/BooleanDispatchNode.java @ 13514:0fbee3eb71f0

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Ruby: import project.
author Chris Seaton <chris.seaton@oracle.com>
date Mon, 06 Jan 2014 17:12:09 +0000
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1 /*
2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
4 * redistribute it and/or modify it under the terms of the:
5 *
6 * Eclipse Public License version 1.0
7 * GNU General Public License version 2
8 * GNU Lesser General Public License version 2.1
9 */
10 package com.oracle.truffle.ruby.nodes.call;
11
12 import com.oracle.truffle.api.*;
13 import com.oracle.truffle.api.frame.*;
14 import com.oracle.truffle.api.nodes.*;
15 import com.oracle.truffle.ruby.nodes.*;
16 import com.oracle.truffle.ruby.runtime.*;
17 import com.oracle.truffle.ruby.runtime.core.*;
18 import com.oracle.truffle.ruby.runtime.methods.*;
19
20 /**
21 * An unboxed node in the dispatch chain that dispatches if the node is a boolean. In normal unboxed
22 * dispatch we look at the Java class of the receiver. However, in Ruby true and false are two
23 * separate classes, so in this situation we have to dispatch on the value, as well as the Java
24 * class when we are dealing with booleans.
25 * <p>
26 * TODO(CS): it would be nice if we could {@link RubyNode#executeBoolean} the receiver, but by the
27 * time we get to this dispatch node the receiver is already executed.
28 */
29 public class BooleanDispatchNode extends UnboxedDispatchNode {
30
31 private final Assumption falseUnmodifiedAssumption;
32 private final RubyMethod falseMethod;
33
34 private final Assumption trueUnmodifiedAssumption;
35 private final RubyMethod trueMethod;
36
37 @Child protected UnboxedDispatchNode next;
38
39 public BooleanDispatchNode(RubyContext context, SourceSection sourceSection, Assumption falseUnmodifiedAssumption, RubyMethod falseMethod, Assumption trueUnmodifiedAssumption,
40 RubyMethod trueMethod, UnboxedDispatchNode next) {
41 super(context, sourceSection);
42
43 assert falseUnmodifiedAssumption != null;
44 assert falseMethod != null;
45 assert trueUnmodifiedAssumption != null;
46 assert trueMethod != null;
47
48 this.falseUnmodifiedAssumption = falseUnmodifiedAssumption;
49 this.falseMethod = falseMethod;
50
51 this.trueUnmodifiedAssumption = trueUnmodifiedAssumption;
52 this.trueMethod = trueMethod;
53
54 this.next = adoptChild(next);
55 }
56
57 @Override
58 public Object dispatch(VirtualFrame frame, Object receiverObject, RubyProc blockObject, Object[] argumentsObjects) {
59 // Check it's a boolean
60
61 if (!(receiverObject instanceof Boolean)) {
62 return next.dispatch(frame, receiverObject, blockObject, argumentsObjects);
63 }
64
65 // Check the value
66
67 Assumption unmodifiedAssumption;
68 RubyMethod method;
69
70 if ((boolean) receiverObject) {
71 unmodifiedAssumption = trueUnmodifiedAssumption;
72 method = trueMethod;
73 } else {
74 unmodifiedAssumption = falseUnmodifiedAssumption;
75 method = falseMethod;
76 }
77
78 // Check the class has not been modified
79
80 try {
81 unmodifiedAssumption.check();
82 } catch (InvalidAssumptionException e) {
83 return respecialize("class modified", frame, receiverObject, blockObject, argumentsObjects);
84 }
85
86 // Call the method
87
88 return method.call(frame.pack(), receiverObject, blockObject, argumentsObjects);
89 }
90
91 @Override
92 public void setNext(UnboxedDispatchNode next) {
93 this.next = adoptChild(next);
94 }
95
96 }