1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "DOMJITHeapRange.h"
29
30namespace JSC { namespace DOMJIT {
31
32struct Effect {
33
34 constexpr static Effect forWrite(HeapRange writeRange)
35 {
36 return { HeapRange::none(), writeRange };
37 }
38
39 constexpr static Effect forRead(HeapRange readRange)
40 {
41 return { readRange, HeapRange::none() };
42 }
43
44 constexpr static Effect forReadWrite(HeapRange readRange, HeapRange writeRange)
45 {
46 return { readRange, writeRange };
47 }
48
49 constexpr static Effect forPure()
50 {
51 return { HeapRange::none(), HeapRange::none(), HeapRange::none() };
52 }
53
54 constexpr static Effect forDef(HeapRange def)
55 {
56 return { def, HeapRange::none(), def };
57 }
58
59 constexpr static Effect forDef(HeapRange def, HeapRange readRange, HeapRange writeRange)
60 {
61 return { readRange, writeRange, def };
62 }
63
64 constexpr bool mustGenerate() const
65 {
66 return !!writes;
67 }
68
69 HeapRange reads { HeapRange::top() };
70 HeapRange writes { HeapRange::top() };
71 HeapRange def { HeapRange::top() };
72};
73
74} }
75