1/*
2 * Copyright (C) 2016-2017 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 "DFGRegisteredStructure.h"
29#include "HeapCell.h"
30#include <wtf/StdLibExtras.h>
31
32#if ENABLE(DFG_JIT)
33
34namespace JSC { namespace DFG {
35
36// This type used in passing an immediate argument to Node constructor;
37// distinguishes an immediate value (typically an index into a CodeBlock data structure -
38// a constant index, argument, or identifier) from a Node*.
39struct OpInfo {
40 OpInfo() : m_value(0) { }
41 template<
42 typename IntegralType,
43 typename Constraint = typename std::enable_if<(std::is_integral<IntegralType>::value || std::is_enum<IntegralType>::value) && sizeof(IntegralType) <= sizeof(uint64_t)>::type>
44 explicit OpInfo(IntegralType value)
45 : m_value(static_cast<uint64_t>(value)) { }
46 explicit OpInfo(RegisteredStructure structure) : m_value(static_cast<uint64_t>(bitwise_cast<uintptr_t>(structure))) { }
47
48
49 template <typename T>
50 explicit OpInfo(T* ptr)
51 {
52 static_assert(!std::is_base_of<HeapCell, T>::value, "To make an OpInfo with a cell in it, the cell must be registered or frozen.");
53 static_assert(!std::is_base_of<StructureSet, T>::value, "To make an OpInfo with a structure set in, make sure to use RegisteredStructureSet.");
54 m_value = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(ptr));
55 }
56
57 uint64_t m_value;
58};
59
60} } // namespace JSC::DFG
61
62#endif // ENABLE(DFG_JIT)
63