/* * Copyright (C) 2016 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 #include "DOMJITHeapRange.h" namespace JSC { namespace DOMJIT { class Effect { public: HeapRange reads { HeapRange::top() }; HeapRange writes { HeapRange::top() }; HeapRange def { HeapRange::top() }; constexpr Effect() = default; constexpr Effect(HeapRange reads, HeapRange writes) : reads(reads) , writes(writes) { } constexpr Effect(HeapRange reads, HeapRange writes, HeapRange def) : reads(reads) , writes(writes) , def(def) { } constexpr static Effect forWrite(HeapRange writeRange) { return Effect(HeapRange::none(), writeRange); } constexpr static Effect forRead(HeapRange readRange) { return Effect(readRange, HeapRange::none()); } constexpr static Effect forReadWrite(HeapRange readRange, HeapRange writeRange) { return Effect(readRange, writeRange); } constexpr static Effect forPure() { return Effect(HeapRange::none(), HeapRange::none(), HeapRange::none()); } constexpr static Effect forDef(HeapRange def) { return Effect(def, HeapRange::none(), def); } constexpr static Effect forDef(HeapRange def, HeapRange readRange, HeapRange writeRange) { return Effect(readRange, writeRange, def); } constexpr bool mustGenerate() const { return !!writes; } }; } }