| /* |
| * 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 { |
| |
| struct Effect { |
| #if !COMPILER_SUPPORTS(NSDMI_FOR_AGGREGATES) |
| 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 } |
| { |
| } |
| #endif |
| |
| constexpr static Effect forWrite(HeapRange writeRange) |
| { |
| return { HeapRange::none(), writeRange }; |
| } |
| |
| constexpr static Effect forRead(HeapRange readRange) |
| { |
| return { readRange, HeapRange::none() }; |
| } |
| |
| constexpr static Effect forReadWrite(HeapRange readRange, HeapRange writeRange) |
| { |
| return { readRange, writeRange }; |
| } |
| |
| constexpr static Effect forPure() |
| { |
| return { HeapRange::none(), HeapRange::none(), HeapRange::none() }; |
| } |
| |
| constexpr static Effect forDef(HeapRange def) |
| { |
| return { def, HeapRange::none(), def }; |
| } |
| |
| constexpr static Effect forDef(HeapRange def, HeapRange readRange, HeapRange writeRange) |
| { |
| return { readRange, writeRange, def }; |
| } |
| |
| constexpr bool mustGenerate() const |
| { |
| return !!writes; |
| } |
| |
| HeapRange reads { HeapRange::top() }; |
| HeapRange writes { HeapRange::top() }; |
| HeapRange def { HeapRange::top() }; |
| }; |
| |
| } } |