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