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Update DemangleConfig.h to better mangle LLVM's version.

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There's no need for the demangling bits to depend on libc++ internals,
in the same way they don't when compiled as part of LLVM.

llvm-svn: 359534
This commit is contained in:
Eric Fiselier 2019-04-30 06:38:24 +00:00
parent d43b66b318
commit 2520530bb0
1 changed files with 68 additions and 12 deletions
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80
libcxxabi/src/demangle/DemangleConfig.h
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@ -1,17 +1,17 @@
//===--- Compiler.h ---------------------------------------------*- C++ -*-===//
//===--- DemangleConfig.h --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// This file is contains a subset of macros copied from
// llvm/lib/Demangle/Compiler.h.
// llvm/include/llvm/Demangle/DemangleConfig.h
//===----------------------------------------------------------------------===//
#ifndef LIBCXX_DEMANGLE_COMPILER_H
#define LIBCXX_DEMANGLE_COMPILER_H
#ifndef LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
#define LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
#include "__config"
#include <ciso646>
#ifdef _MSC_VER
// snprintf is implemented in VS 2015
@ -20,22 +20,78 @@
#endif
#endif
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#ifndef __has_cpp_attribute
#define __has_cpp_attribute(x) 0
#endif
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
#ifndef NDEBUG
#if __has_attribute(noinline) && __has_attribute(used)
#define DEMANGLE_DUMP_METHOD __attribute__((noinline, used))
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#ifndef DEMANGLE_GNUC_PREREQ
#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
((maj) << 20) + ((min) << 10) + (patch))
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
#else
#define DEMANGLE_DUMP_METHOD
#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
#endif
#endif
#define DEMANGLE_FALLTHROUGH _LIBCPP_FALLTHROUGH()
#define DEMANGLE_UNREACHABLE _LIBCPP_UNREACHABLE()
#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
#else
#define DEMANGLE_ATTRIBUTE_USED
#endif
#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
#define DEMANGLE_UNREACHABLE __builtin_unreachable()
#elif defined(_MSC_VER)
#define DEMANGLE_UNREACHABLE __assume(false)
#else
#define DEMANGLE_UNREACHABLE
#endif
#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER)
#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
#else
#define DEMANGLE_ATTRIBUTE_NOINLINE
#endif
#if !defined(NDEBUG)
#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
#else
#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
#endif
#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
#define DEMANGLE_FALLTHROUGH [[fallthrough]]
#elif __has_cpp_attribute(gnu::fallthrough)
#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
#elif !__cplusplus
// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
// error when __has_cpp_attribute is given a scoped attribute in C mode.
#define DEMANGLE_FALLTHROUGH
#elif __has_cpp_attribute(clang::fallthrough)
#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
#else
#define DEMANGLE_FALLTHROUGH
#endif
#define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle {
#define DEMANGLE_NAMESPACE_END } }
#endif
#endif // LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H