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https://github.com/darlinghq/darling-JavaScriptCore.git
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63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
/*
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(B3_JIT)
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namespace JSC { namespace B3 {
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enum class FrequencyClass : uint8_t {
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// We don't have any hypothesis about the frequency of this control flow construct. This is
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// the common case. We can still use basic block frequency in this case.
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Normal,
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// We expect that this control flow construct will be reached super rarely. It's valid to
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// perform optimizations that punish Rare code. Note that there will be situations where you
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// have to somehow construct a new frequency class from a merging of multiple classes. When
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// this happens, never choose Rare; always go with Normal. This is necessary because we
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// really do punish Rare code very badly.
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Rare
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};
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inline FrequencyClass maxFrequency(FrequencyClass a, FrequencyClass b)
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{
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if (a == FrequencyClass::Normal)
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return FrequencyClass::Normal;
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return b;
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}
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} } // namespace JSC::B3
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namespace WTF {
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class PrintStream;
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void printInternal(PrintStream&, JSC::B3::FrequencyClass);
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} // namespace WTF
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#endif // ENABLE(B3_JIT)
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