| | 1 | /* |
| | 2 | * Copyright (C) 2014 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 FTLWeightedTarget_h |
| | 27 | #define FTLWeightedTarget_h |
| | 28 | |
| | 29 | #if ENABLE(FTL_JIT) |
| | 30 | |
| | 31 | #include "FTLAbbreviatedTypes.h" |
| | 32 | #include "FTLWeight.h" |
| | 33 | |
| | 34 | namespace JSC { namespace FTL { |
| | 35 | |
| | 36 | class WeightedTarget { |
| | 37 | public: |
| | 38 | WeightedTarget() |
| | 39 | : m_target(nullptr) |
| | 40 | { |
| | 41 | } |
| | 42 | |
| | 43 | WeightedTarget(LBasicBlock target, Weight weight) |
| | 44 | : m_target(target) |
| | 45 | , m_weight(weight) |
| | 46 | { |
| | 47 | } |
| | 48 | |
| | 49 | WeightedTarget(LBasicBlock target, float weight) |
| | 50 | : m_target(target) |
| | 51 | , m_weight(weight) |
| | 52 | { |
| | 53 | } |
| | 54 | |
| | 55 | LBasicBlock target() const { return m_target; } |
| | 56 | Weight weight() const { return m_weight; } |
| | 57 | |
| | 58 | private: |
| | 59 | LBasicBlock m_target; |
| | 60 | Weight m_weight; |
| | 61 | }; |
| | 62 | |
| | 63 | // Helpers for creating weighted targets for statically known (or unknown) branch |
| | 64 | // profiles. |
| | 65 | |
| | 66 | inline WeightedTarget usually(LBasicBlock block) |
| | 67 | { |
| | 68 | return WeightedTarget(block, 1); |
| | 69 | } |
| | 70 | |
| | 71 | inline WeightedTarget rarely(LBasicBlock block) |
| | 72 | { |
| | 73 | return WeightedTarget(block, 0); |
| | 74 | } |
| | 75 | |
| | 76 | // This means we let LLVM figure it out basic on its static estimates. LLVM's static |
| | 77 | // estimates are usually pretty darn good, so there's generally nothing wrong with |
| | 78 | // using this. |
| | 79 | inline WeightedTarget unsure(LBasicBlock block) |
| | 80 | { |
| | 81 | return WeightedTarget(block, Weight()); |
| | 82 | } |
| | 83 | |
| | 84 | } } // namespace JSC::FTL |
| | 85 | |
| | 86 | #endif // ENABLE(FTL_JIT) |
| | 87 | |
| | 88 | #endif // FTLWeightedTarget_h |
| | 89 | |
projects / apple / javascriptcore.git / blame_incremental