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comparison graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/FunctionBodyNode.java @ 12752:71991b7a0f14

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SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
author Christian Humer <christian.humer@gmail.com>
date Mon, 11 Nov 2013 21:34:44 +0100
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12712:882a0aadfed6 12752:71991b7a0f14
1 /*
2 * Copyright (c) 2012, 2012, 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.frame.*;
26 import com.oracle.truffle.api.nodes.*;
27
28 public class FunctionBodyNode extends TypedNode {
29
30 @Child private StatementNode body;
31 @Child private TypedNode returnValue;
32 @Child private StatementNode writeArguments;
33
34 private FrameDescriptor frameDescriptor;
35
36 public FunctionBodyNode(FrameDescriptor frameDescriptor, StatementNode body, TypedNode returnValue, String[] parameterNames) {
37 this.frameDescriptor = frameDescriptor;
38 this.body = adoptChild(body);
39 this.returnValue = adoptChild(returnValue);
40 this.writeArguments = adoptChild(new BlockNode(createWriteArguments(parameterNames)));
41 }
42
43 @Override
44 public Object executeGeneric(VirtualFrame frame) {
45 writeArguments.executeVoid(frame);
46 try {
47 body.executeVoid(frame);
48 } catch (ReturnException ex) {
49 // Nothing to do, we just need to return.
50 }
51 if (returnValue != null) {
52 return returnValue.executeGeneric(frame);
53 } else {
54 return null;
55 }
56 }
57
58 @Override
59 public Node copy() {
60 FunctionBodyNode copy = (FunctionBodyNode) super.copy();
61 copy.frameDescriptor = frameDescriptor.shallowCopy();
62 return copy;
63 }
64
65 private StatementNode[] createWriteArguments(String[] parameterNames) {
66 StatementNode[] writeNodes = new StatementNode[parameterNames.length];
67 for (int i = 0; i < parameterNames.length; i++) {
68 FrameSlot frameSlot = frameDescriptor.findOrAddFrameSlot(parameterNames[i]);
69 writeNodes[i] = WriteLocalNodeFactory.create(frameSlot, new ReadArgumentNode(i));
70 }
71 return writeNodes;
72 }
73
74 public FrameDescriptor getFrameDescriptor() {
75 return frameDescriptor;
76 }
77
78 }