/* * Copyright (C) 2019 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 "VirtualRegister.h" #include <wtf/PrintStream.h> namespace JSC { class SymbolTableOrScopeDepth { public: SymbolTableOrScopeDepth() = default; static SymbolTableOrScopeDepth symbolTable(VirtualRegister reg) { ASSERT(reg.isConstant()); return SymbolTableOrScopeDepth(reg.offset() - FirstConstantRegisterIndex); } static SymbolTableOrScopeDepth scopeDepth(unsigned scopeDepth) { return SymbolTableOrScopeDepth(scopeDepth); } static SymbolTableOrScopeDepth raw(unsigned value) { return SymbolTableOrScopeDepth(value); } VirtualRegister symbolTable() const { return VirtualRegister(m_raw + FirstConstantRegisterIndex); } unsigned scopeDepth() const { return m_raw; } unsigned raw() const { return m_raw; } void dump(PrintStream& out) const { out.print(m_raw); } private: SymbolTableOrScopeDepth(unsigned value) : m_raw(value) { } unsigned m_raw { 0 }; }; } // namespace JSC