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comparison truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLExpressionNode.java @ 21951:9c8c0937da41

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Moving all sources into truffle subdirectory
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 17 Jun 2015 10:58:08 +0200
parents graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLExpressionNode.java@c0455554d45b
children c07e64ecb528
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21950:2a5011c7e641 21951:9c8c0937da41
1 /*
2 * Copyright (c) 2012, 2015, 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 com.oracle.truffle.sl.nodes;
24
25 import com.oracle.truffle.api.dsl.*;
26 import com.oracle.truffle.api.frame.*;
27 import com.oracle.truffle.api.instrument.ProbeNode.WrapperNode;
28 import com.oracle.truffle.api.nodes.*;
29 import com.oracle.truffle.api.source.*;
30 import com.oracle.truffle.sl.nodes.instrument.*;
31 import com.oracle.truffle.sl.runtime.*;
32
33 /**
34 * Base class for all SL nodes that produce a value and therefore benefit from type specialization.
35 * The annotation {@link TypeSystemReference} specifies the SL types. Specifying it here defines the
36 * type system for all subclasses.
37 */
38 @TypeSystemReference(SLTypes.class)
39 @NodeInfo(description = "The abstract base node for all expressions")
40 public abstract class SLExpressionNode extends SLStatementNode {
41
42 public SLExpressionNode(SourceSection src) {
43 super(src);
44 }
45
46 /**
47 * The execute method when no specialization is possible. This is the most general case,
48 * therefore it must be provided by all subclasses.
49 */
50 public abstract Object executeGeneric(VirtualFrame frame);
51
52 /**
53 * When we use an expression at places where a {@link SLStatementNode statement} is already
54 * sufficient, the return value is just discarded.
55 */
56 @Override
57 public void executeVoid(VirtualFrame frame) {
58 executeGeneric(frame);
59 }
60
61 /*
62 * Execute methods for specialized types. They all follow the same pattern: they call the
63 * generic execution method and then expect a result of their return type. Type-specialized
64 * subclasses overwrite the appropriate methods.
65 */
66
67 public long executeLong(VirtualFrame frame) throws UnexpectedResultException {
68 return SLTypesGen.expectLong(executeGeneric(frame));
69 }
70
71 public SLFunction executeFunction(VirtualFrame frame) throws UnexpectedResultException {
72 return SLTypesGen.expectSLFunction(executeGeneric(frame));
73 }
74
75 public boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException {
76 return SLTypesGen.expectBoolean(executeGeneric(frame));
77 }
78
79 @Override
80 public boolean isInstrumentable() {
81 return true;
82 }
83
84 @Override
85 public WrapperNode createWrapperNode() {
86 return new SLExpressionWrapperNode(this);
87 }
88
89 }