1/*
2 * Copyright (C) 2013-2015 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#include "config.h"
27#include "DFGClobberize.h"
28
29#if ENABLE(DFG_JIT)
30
31#include "JSCInlines.h"
32
33namespace JSC { namespace DFG {
34
35bool doesWrites(Graph& graph, Node* node)
36{
37 NoOpClobberize noOp;
38 CheckClobberize addWrite;
39 clobberize(graph, node, noOp, addWrite, noOp);
40 return addWrite.result();
41}
42
43bool accessesOverlap(Graph& graph, Node* node, AbstractHeap heap)
44{
45 NoOpClobberize noOp;
46 AbstractHeapOverlaps addAccess(heap);
47 clobberize(graph, node, addAccess, addAccess, noOp);
48 return addAccess.result();
49}
50
51bool writesOverlap(Graph& graph, Node* node, AbstractHeap heap)
52{
53 NoOpClobberize noOp;
54 AbstractHeapOverlaps addWrite(heap);
55 clobberize(graph, node, noOp, addWrite, noOp);
56 return addWrite.result();
57}
58
59bool clobbersHeap(Graph& graph, Node* node)
60{
61 bool result = false;
62 clobberize(
63 graph, node, NoOpClobberize(),
64 [&] (AbstractHeap heap) {
65 switch (heap.kind()) {
66 case World:
67 case Heap:
68 result = true;
69 break;
70 default:
71 break;
72 }
73 },
74 NoOpClobberize());
75 return result;
76}
77
78} } // namespace JSC::DFG
79
80#endif // ENABLE(DFG_JIT)
81
82