PlainCstInsn.java revision 579d7739c53a2707ad711a2d2cae46d7d782f061 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dx.rop.code;
18
19import com.android.dx.rop.cst.Constant;
20import com.android.dx.rop.type.StdTypeList;
21import com.android.dx.rop.type.Type;
22import com.android.dx.rop.type.TypeList;
23
24/**
25 * Instruction which contains an explicit reference to a constant
26 * but which cannot throw an exception.
27 */
28public final class PlainCstInsn
29        extends CstInsn {
30    /**
31     * Constructs an instance.
32     *
33     * @param opcode {@code non-null;} the opcode
34     * @param position {@code non-null;} source position
35     * @param result {@code null-ok;} spec for the result, if any
36     * @param sources {@code non-null;} specs for all the sources
37     * @param cst {@code non-null;} the constant
38     */
39    public PlainCstInsn(Rop opcode, SourcePosition position,
40                        RegisterSpec result, RegisterSpecList sources,
41                        Constant cst) {
42        super(opcode, position, result, sources, cst);
43
44        if (opcode.getBranchingness() != Rop.BRANCH_NONE) {
45            throw new IllegalArgumentException("bogus branchingness");
46        }
47    }
48
49    /** {@inheritDoc} */
50    @Override
51    public TypeList getCatches() {
52        return StdTypeList.EMPTY;
53    }
54
55    /** {@inheritDoc} */
56    @Override
57    public void accept(Visitor visitor) {
58        visitor.visitPlainCstInsn(this);
59    }
60
61    /** {@inheritDoc} */
62    @Override
63    public Insn withAddedCatch(Type type) {
64        throw new UnsupportedOperationException("unsupported");
65    }
66
67    /** {@inheritDoc} */
68    @Override
69    public Insn withRegisterOffset(int delta) {
70        return new PlainCstInsn(getOpcode(), getPosition(),
71                                getResult().withOffset(delta),
72                                getSources().withOffset(delta),
73                                getConstant());
74    }
75
76    /** {@inheritDoc} */
77    @Override
78    public Insn withNewRegisters(RegisterSpec result,
79            RegisterSpecList sources) {
80
81        return new PlainCstInsn(getOpcode(), getPosition(),
82                                result,
83                                sources,
84                                getConstant());
85
86    }
87}
88