projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 6fe7ccc8 A |
1 | /* |
| 2 | * Copyright (C) 2012 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 DFGArgumentPosition_h | |
| 27 | #define DFGArgumentPosition_h | |
| 28 | ||
| 29 | #include "DFGDoubleFormatState.h" | |
| 30 | #include "DFGVariableAccessData.h" | |
| 31 | #include "PredictedType.h" | |
| 32 | ||
| 33 | namespace JSC { namespace DFG { | |
| 34 | ||
| 35 | class ArgumentPosition { | |
| 36 | public: | |
| 37 | ArgumentPosition() | |
| 38 | : m_prediction(PredictNone) | |
| 39 | , m_doubleFormatState(EmptyDoubleFormatState) | |
| 40 | { | |
| 41 | } | |
| 42 | ||
| 43 | void addVariable(VariableAccessData* variable) | |
| 44 | { | |
| 45 | m_variables.append(variable); | |
| 46 | } | |
| 47 | ||
| 48 | bool mergeArgumentAwareness() | |
| 49 | { | |
| 50 | bool changed = false; | |
| 51 | for (unsigned i = 0; i < m_variables.size(); ++i) { | |
| 52 | changed |= mergePrediction(m_prediction, m_variables[i]->argumentAwarePrediction()); | |
| 53 | changed |= mergeDoubleFormatState(m_doubleFormatState, m_variables[i]->doubleFormatState()); | |
| 54 | } | |
| 55 | if (!changed) | |
| 56 | return false; | |
| 57 | changed = false; | |
| 58 | for (unsigned i = 0; i < m_variables.size(); ++i) { | |
| 59 | changed |= m_variables[i]->mergeArgumentAwarePrediction(m_prediction); | |
| 60 | changed |= m_variables[i]->mergeDoubleFormatState(m_doubleFormatState); | |
| 61 | } | |
| 62 | return changed; | |
| 63 | } | |
| 64 | ||
| 65 | private: | |
| 66 | PredictedType m_prediction; | |
| 67 | DoubleFormatState m_doubleFormatState; | |
| 68 | ||
| 69 | Vector<VariableAccessData*, 2> m_variables; | |
| 70 | }; | |
| 71 | ||
| 72 | } } // namespace JSC::DFG | |
| 73 | ||
| 74 | #endif // DFGArgumentPosition_h | |
| 75 |