1/*
2 * Copyright (C) 2014 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#if ENABLE(DFG_JIT)
29
30#include <wtf/PrintStream.h>
31
32namespace JSC { namespace DFG {
33
34enum StructureClobberState : uint8_t {
35 StructuresAreWatched, // Constants with watchable structures must have those structures.
36 StructuresAreClobbered // Constants with watchable structures could have any structure.
37};
38
39inline StructureClobberState merge(StructureClobberState a, StructureClobberState b)
40{
41 switch (a) {
42 case StructuresAreWatched:
43 return b;
44 case StructuresAreClobbered:
45 return StructuresAreClobbered;
46 }
47 RELEASE_ASSERT_NOT_REACHED();
48 return StructuresAreClobbered;
49}
50
51} } // namespace JSC::DFG
52
53namespace WTF {
54
55inline void printInternal(PrintStream& out, JSC::DFG::StructureClobberState state)
56{
57 switch (state) {
58 case JSC::DFG::StructuresAreWatched:
59 out.print("StructuresAreWatched");
60 return;
61 case JSC::DFG::StructuresAreClobbered:
62 out.print("StructuresAreClobbered");
63 return;
64 }
65 RELEASE_ASSERT_NOT_REACHED();
66}
67
68} // namespace WTF
69
70#endif // ENABLE(DFG_JIT)
71