1/*
2 * Copyright (C) 2013 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#ifndef FTLFormattedValue_h
27#define FTLFormattedValue_h
28
29#if ENABLE(FTL_JIT)
30
31#include "FTLAbbreviations.h"
32#include "FTLValueFormat.h"
33
34namespace JSC { namespace FTL {
35
36// This class is mostly used for OSR; it's a way of specifying how a value is formatted
37// in cases where it wouldn't have been obvious from looking at other indicators (like
38// the type of the LLVMValueRef or the type of the DFG::Node). Typically this arises
39// because LLVMValueRef doesn't give us the granularity we need to begin with, and we
40// use this in situations where there is no good way to say what node the value came
41// from.
42
43class FormattedValue {
44public:
45    FormattedValue()
46        : m_format(InvalidValueFormat)
47        , m_value(0)
48    {
49    }
50
51    FormattedValue(ValueFormat format, LValue value)
52        : m_format(format)
53        , m_value(value)
54    {
55    }
56
57    bool operator!() const
58    {
59        ASSERT((m_format == InvalidValueFormat) == !m_value);
60        return m_format == InvalidValueFormat;
61    }
62
63    ValueFormat format() const { return m_format; }
64    LValue value() const { return m_value; }
65
66private:
67    ValueFormat m_format;
68    LValue m_value;
69};
70
71static inline FormattedValue noValue() { return FormattedValue(); }
72static inline FormattedValue int32Value(LValue value) { return FormattedValue(ValueFormatInt32, value); }
73static inline FormattedValue booleanValue(LValue value) { return FormattedValue(ValueFormatBoolean, value); }
74static inline FormattedValue jsValueValue(LValue value) { return FormattedValue(ValueFormatJSValue, value); }
75static inline FormattedValue doubleValue(LValue value) { return FormattedValue(ValueFormatDouble, value); }
76
77} } // namespace JSC::FTL
78
79#endif // ENABLE(FTL_JIT)
80
81#endif // FTLFormattedValue_h
82
83