mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-16 11:30:51 +00:00
b121bfcc22
doesn't return, so just go back to using the old runtime function instead of trying to use abort() when __builtin_unreachable (or an equivalent) isn't supported. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127629 91177308-0d34-0410-b5e6-96231b3b80d8
138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
//===-- llvm/Support/Compiler.h - Compiler abstraction support --*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines several macros, based on the current compiler. This allows
|
|
// use of compiler-specific features in a way that remains portable.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_COMPILER_H
|
|
#define LLVM_SUPPORT_COMPILER_H
|
|
|
|
#ifndef __has_feature
|
|
# define __has_feature(x) 0
|
|
#endif
|
|
|
|
/// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked
|
|
/// into a shared library, then the class should be private to the library and
|
|
/// not accessible from outside it. Can also be used to mark variables and
|
|
/// functions, making them private to any shared library they are linked into.
|
|
#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
|
|
#define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
|
|
#else
|
|
#define LLVM_LIBRARY_VISIBILITY
|
|
#endif
|
|
|
|
#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
|
|
#define LLVM_ATTRIBUTE_USED __attribute__((__used__))
|
|
#else
|
|
#define LLVM_ATTRIBUTE_USED
|
|
#endif
|
|
|
|
// Some compilers warn about unused functions. When a function is sometimes
|
|
// used or not depending on build settings (e.g. a function only called from
|
|
// within "assert"), this attribute can be used to suppress such warnings.
|
|
//
|
|
// However, it shouldn't be used for unused *variables*, as those have a much
|
|
// more portable solution:
|
|
// (void)unused_var_name;
|
|
// Prefer cast-to-void wherever it is sufficient.
|
|
#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
|
|
#define LLVM_ATTRIBUTE_UNUSED __attribute__((__unused__))
|
|
#else
|
|
#define LLVM_ATTRIBUTE_UNUSED
|
|
#endif
|
|
|
|
#ifdef __GNUC__ // aka 'ATTRIBUTE_CONST' but following LLVM Conventions.
|
|
#define LLVM_ATTRIBUTE_READNONE __attribute__((__const__))
|
|
#else
|
|
#define LLVM_ATTRIBUTE_READNONE
|
|
#endif
|
|
|
|
#ifdef __GNUC__ // aka 'ATTRIBUTE_PURE' but following LLVM Conventions.
|
|
#define LLVM_ATTRIBUTE_READONLY __attribute__((__pure__))
|
|
#else
|
|
#define LLVM_ATTRIBUTE_READONLY
|
|
#endif
|
|
|
|
#if (__GNUC__ >= 4)
|
|
#define BUILTIN_EXPECT(EXPR, VALUE) __builtin_expect((EXPR), (VALUE))
|
|
#else
|
|
#define BUILTIN_EXPECT(EXPR, VALUE) (EXPR)
|
|
#endif
|
|
|
|
// C++ doesn't support 'extern template' of template specializations. GCC does,
|
|
// but requires __extension__ before it. In the header, use this:
|
|
// EXTERN_TEMPLATE_INSTANTIATION(class foo<bar>);
|
|
// in the .cpp file, use this:
|
|
// TEMPLATE_INSTANTIATION(class foo<bar>);
|
|
#ifdef __GNUC__
|
|
#define EXTERN_TEMPLATE_INSTANTIATION(X) __extension__ extern template X
|
|
#define TEMPLATE_INSTANTIATION(X) template X
|
|
#else
|
|
#define EXTERN_TEMPLATE_INSTANTIATION(X)
|
|
#define TEMPLATE_INSTANTIATION(X)
|
|
#endif
|
|
|
|
// LLVM_ATTRIBUTE_NOINLINE - On compilers where we have a directive to do so,
|
|
// mark a method "not for inlining".
|
|
#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
|
|
#define LLVM_ATTRIBUTE_NOINLINE __attribute__((noinline))
|
|
#elif defined(_MSC_VER)
|
|
#define LLVM_ATTRIBUTE_NOINLINE __declspec(noinline)
|
|
#else
|
|
#define LLVM_ATTRIBUTE_NOINLINE
|
|
#endif
|
|
|
|
// LLVM_ATTRIBUTE_ALWAYS_INLINE - On compilers where we have a directive to do
|
|
// so, mark a method "always inline" because it is performance sensitive. GCC
|
|
// 3.4 supported this but is buggy in various cases and produces unimplemented
|
|
// errors, just use it in GCC 4.0 and later.
|
|
#if __GNUC__ > 3
|
|
#define LLVM_ATTRIBUTE_ALWAYS_INLINE __attribute__((always_inline))
|
|
#elif defined(_MSC_VER)
|
|
#define LLVM_ATTRIBUTE_ALWAYS_INLINE __forceinline
|
|
#else
|
|
#define LLVM_ATTRIBUTE_ALWAYS_INLINE
|
|
#endif
|
|
|
|
|
|
#ifdef __GNUC__
|
|
#define LLVM_ATTRIBUTE_NORETURN __attribute__((noreturn))
|
|
#elif defined(_MSC_VER)
|
|
#define LLVM_ATTRIBUTE_NORETURN __declspec(noreturn)
|
|
#else
|
|
#define LLVM_ATTRIBUTE_NORETURN
|
|
#endif
|
|
|
|
// LLVM_ATTRIBUTE_DEPRECATED(decl, "message")
|
|
#if __has_feature(attribute_deprecated_with_message)
|
|
# define LLVM_ATTRIBUTE_DEPRECATED(decl, message) \
|
|
decl __attribute__((deprecated(message)))
|
|
#elif defined(__GNUC__)
|
|
# define LLVM_ATTRIBUTE_DEPRECATED(decl, message) \
|
|
decl __attribute__((deprecated))
|
|
#elif defined(_MSC_VER)
|
|
# define LLVM_ATTRIBUTE_DEPRECATED(decl, message) \
|
|
__declspec(deprecated(message)) decl
|
|
#else
|
|
# define LLVM_ATTRIBUTE_DEPRECATED(decl, message) \
|
|
decl
|
|
#endif
|
|
|
|
// LLVM_BUILTIN_UNREACHABLE - On compilers which support it, expands
|
|
// to an expression which states that it is undefined behavior for the
|
|
// compiler to reach this point. Otherwise is not defined.
|
|
#if defined(__clang__) || (__GNUC__ > 4) \
|
|
|| (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
|
|
# define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable()
|
|
#endif
|
|
|
|
#endif
|