Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DLoadPop2Trimmer |
|
| 2.5;2.5 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | package org.apache.commons.nabla.forward.trimming; | |
18 | ||
19 | import org.objectweb.asm.Opcodes; | |
20 | import org.objectweb.asm.tree.AbstractInsnNode; | |
21 | import org.objectweb.asm.tree.InsnList; | |
22 | ||
23 | /** Trimmer removing (DLOAD i, POP2). | |
24 | * @version $Id$ | |
25 | */ | |
26 | public class DLoadPop2Trimmer extends BytecodeTrimmer { | |
27 | ||
28 | /** Simple constructor. | |
29 | */ | |
30 | public DLoadPop2Trimmer() { | |
31 | 66 | super(2); |
32 | 66 | } |
33 | ||
34 | /** {@inheritDoc} */ | |
35 | @Override | |
36 | protected boolean trimWindow(final InsnList instructions, | |
37 | final AbstractInsnNode[] window) { | |
38 | ||
39 | 349 | if ((window[0].getOpcode() == Opcodes.DUP2) && |
40 | (window[1].getOpcode() == Opcodes.POP2)) { | |
41 | ||
42 | // remove the no-op instructions pair | |
43 | 0 | instructions.remove(window[0]); |
44 | 0 | instructions.remove(window[1]); |
45 | ||
46 | 0 | return true; |
47 | ||
48 | } | |
49 | ||
50 | // nothing have been done | |
51 | 349 | return false; |
52 | ||
53 | } | |
54 | ||
55 | } |