ftl/FTLFormattedValue.h

   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
  34 namespace 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
  43 class FormattedValue {
  44 public:
  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
  66 private:
  67     ValueFormat m_format;
  68     LValue m_value;
  69 };
  70
  71 static inline FormattedValue noValue() { return FormattedValue(); }
  72 static inline FormattedValue int32Value(LValue value) { return FormattedValue(ValueFormatInt32, value); }
  73 static inline FormattedValue booleanValue(LValue value) { return FormattedValue(ValueFormatBoolean, value); }
  74 static inline FormattedValue jsValueValue(LValue value) { return FormattedValue(ValueFormatJSValue, value); }
  75 static 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