| /* |
| * 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) |
