mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
9c02a27604
This change lets us bootstrap LLVM/Clang under ASan and MSan. It contains fixes for 2 issues: - X86JIT reads return address from stack, which MSan does not know is initialized. - bugpoint tests run binaries with RLIMIT_AS. This does not work with certain Sanitizers. We are no longer including config.h in Compiler.h with this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174306 91177308-0d34-0410-b5e6-96231b3b80d8
335 lines
11 KiB
C++
335 lines
11 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
|
|
|
|
#include "llvm/Config/llvm-config.h"
|
|
|
|
#ifndef __has_feature
|
|
# define __has_feature(x) 0
|
|
#endif
|
|
|
|
/// \brief Does the compiler support r-value references?
|
|
/// This implies that <utility> provides the one-argument std::move; it
|
|
/// does not imply the existence of any other C++ library features.
|
|
#if (__has_feature(cxx_rvalue_references) \
|
|
|| defined(__GXX_EXPERIMENTAL_CXX0X__) \
|
|
|| (defined(_MSC_VER) && _MSC_VER >= 1600))
|
|
#define LLVM_HAS_RVALUE_REFERENCES 1
|
|
#else
|
|
#define LLVM_HAS_RVALUE_REFERENCES 0
|
|
#endif
|
|
|
|
/// \brief Does the compiler support r-value reference *this?
|
|
///
|
|
/// Sadly, this is separate from just r-value reference support because GCC
|
|
/// implemented everything but this thus far. No release of GCC yet has support
|
|
/// for this feature so it is enabled with Clang only.
|
|
/// FIXME: This should change to a version check when GCC grows support for it.
|
|
#if __has_feature(cxx_rvalue_references)
|
|
#define LLVM_HAS_RVALUE_REFERENCE_THIS 1
|
|
#else
|
|
#define LLVM_HAS_RVALUE_REFERENCE_THIS 0
|
|
#endif
|
|
|
|
/// \macro LLVM_HAS_CXX11_TYPETRAITS
|
|
/// \brief Does the compiler have the C++11 type traits.
|
|
///
|
|
/// #include <type_traits>
|
|
///
|
|
/// * enable_if
|
|
/// * {true,false}_type
|
|
/// * is_constructible
|
|
/// * etc...
|
|
#if defined(__GXX_EXPERIMENTAL_CXX0X__) \
|
|
|| (defined(_MSC_VER) && _MSC_VER >= 1700)
|
|
#define LLVM_HAS_CXX11_TYPETRAITS 1
|
|
#else
|
|
#define LLVM_HAS_CXX11_TYPETRAITS 0
|
|
#endif
|
|
|
|
/// \macro LLVM_HAS_CXX11_STDLIB
|
|
/// \brief Does the compiler have the C++11 standard library.
|
|
///
|
|
/// Implies LLVM_HAS_RVALUE_REFERENCES, LLVM_HAS_CXX11_TYPETRAITS
|
|
#if defined(__GXX_EXPERIMENTAL_CXX0X__) \
|
|
|| (defined(_MSC_VER) && _MSC_VER >= 1700)
|
|
#define LLVM_HAS_CXX11_STDLIB 1
|
|
#else
|
|
#define LLVM_HAS_CXX11_STDLIB 0
|
|
#endif
|
|
|
|
/// llvm_move - Expands to ::std::move if the compiler supports
|
|
/// r-value references; otherwise, expands to the argument.
|
|
#if LLVM_HAS_RVALUE_REFERENCES
|
|
#define llvm_move(value) (::std::move(value))
|
|
#else
|
|
#define llvm_move(value) (value)
|
|
#endif
|
|
|
|
/// Expands to '&' if r-value references are supported.
|
|
///
|
|
/// This can be used to provide l-value/r-value overrides of member functions.
|
|
/// The r-value override should be guarded by LLVM_HAS_RVALUE_REFERENCE_THIS
|
|
#if LLVM_HAS_RVALUE_REFERENCE_THIS
|
|
#define LLVM_LVALUE_FUNCTION &
|
|
#else
|
|
#define LLVM_LVALUE_FUNCTION
|
|
#endif
|
|
|
|
/// LLVM_DELETED_FUNCTION - Expands to = delete if the compiler supports it.
|
|
/// Use to mark functions as uncallable. Member functions with this should
|
|
/// be declared private so that some behavior is kept in C++03 mode.
|
|
///
|
|
/// class DontCopy {
|
|
/// private:
|
|
/// DontCopy(const DontCopy&) LLVM_DELETED_FUNCTION;
|
|
/// DontCopy &operator =(const DontCopy&) LLVM_DELETED_FUNCTION;
|
|
/// public:
|
|
/// ...
|
|
/// };
|
|
#if (__has_feature(cxx_deleted_functions) \
|
|
|| defined(__GXX_EXPERIMENTAL_CXX0X__))
|
|
// No version of MSVC currently supports this.
|
|
#define LLVM_DELETED_FUNCTION = delete
|
|
#else
|
|
#define LLVM_DELETED_FUNCTION
|
|
#endif
|
|
|
|
/// LLVM_FINAL - Expands to 'final' if the compiler supports it.
|
|
/// Use to mark classes or virtual methods as final.
|
|
#if __has_feature(cxx_override_control) \
|
|
|| (defined(_MSC_VER) && _MSC_VER >= 1700)
|
|
#define LLVM_FINAL final
|
|
#else
|
|
#define LLVM_FINAL
|
|
#endif
|
|
|
|
/// LLVM_OVERRIDE - Expands to 'override' if the compiler supports it.
|
|
/// Use to mark virtual methods as overriding a base class method.
|
|
#if __has_feature(cxx_override_control) \
|
|
|| (defined(_MSC_VER) && _MSC_VER >= 1700)
|
|
#define LLVM_OVERRIDE override
|
|
#else
|
|
#define LLVM_OVERRIDE
|
|
#endif
|
|
|
|
#if __has_feature(cxx_constexpr) || defined(__GXX_EXPERIMENTAL_CXX0X__)
|
|
# define LLVM_CONSTEXPR constexpr
|
|
#else
|
|
# define LLVM_CONSTEXPR
|
|
#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
|
|
|
|
#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
|
|
#define LLVM_ATTRIBUTE_WEAK __attribute__((__weak__))
|
|
#else
|
|
#define LLVM_ATTRIBUTE_WEAK
|
|
#endif
|
|
|
|
#ifdef __GNUC__ // aka 'CONST' but following LLVM Conventions.
|
|
#define LLVM_READNONE __attribute__((__const__))
|
|
#else
|
|
#define LLVM_READNONE
|
|
#endif
|
|
|
|
#ifdef __GNUC__ // aka 'PURE' but following LLVM Conventions.
|
|
#define LLVM_READONLY __attribute__((__pure__))
|
|
#else
|
|
#define LLVM_READONLY
|
|
#endif
|
|
|
|
#if (__GNUC__ >= 4)
|
|
#define LLVM_LIKELY(EXPR) __builtin_expect((bool)(EXPR), true)
|
|
#define LLVM_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false)
|
|
#else
|
|
#define LLVM_LIKELY(EXPR) (EXPR)
|
|
#define LLVM_UNLIKELY(EXPR) (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 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_EXTENSION - Support compilers where we have a keyword to suppress
|
|
/// pedantic diagnostics.
|
|
#ifdef __GNUC__
|
|
#define LLVM_EXTENSION __extension__
|
|
#else
|
|
#define LLVM_EXTENSION
|
|
#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()
|
|
#elif defined(_MSC_VER)
|
|
# define LLVM_BUILTIN_UNREACHABLE __assume(false)
|
|
#endif
|
|
|
|
/// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression
|
|
/// which causes the program to exit abnormally.
|
|
#if defined(__clang__) || (__GNUC__ > 4) \
|
|
|| (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
|
|
# define LLVM_BUILTIN_TRAP __builtin_trap()
|
|
#else
|
|
# define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0
|
|
#endif
|
|
|
|
/// \macro LLVM_ASSUME_ALIGNED
|
|
/// \brief Returns a pointer with an assumed alignment.
|
|
#if !defined(__clang__) && ((__GNUC__ > 4) \
|
|
|| (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
|
|
// FIXME: Enable on clang when it supports it.
|
|
# define LLVM_ASSUME_ALIGNED(p, a) __builtin_assume_aligned(p, a)
|
|
#elif defined(LLVM_BUILTIN_UNREACHABLE)
|
|
# define LLVM_ASSUME_ALIGNED(p, a) \
|
|
(((uintptr_t(p) % (a)) == 0) ? (p) : (LLVM_BUILTIN_UNREACHABLE, (p)))
|
|
#else
|
|
# define LLVM_ASSUME_ALIGNED(p, a) (p)
|
|
#endif
|
|
|
|
/// \macro LLVM_FUNCTION_NAME
|
|
/// \brief Expands to __func__ on compilers which support it. Otherwise,
|
|
/// expands to a compiler-dependent replacement.
|
|
#if defined(_MSC_VER)
|
|
# define LLVM_FUNCTION_NAME __FUNCTION__
|
|
#else
|
|
# define LLVM_FUNCTION_NAME __func__
|
|
#endif
|
|
|
|
#if defined(LLVM_HAVE_MSAN_ANNOTATIONS)
|
|
# include <sanitizer/msan_interface.h>
|
|
#else
|
|
# define __msan_allocated_memory(p, size)
|
|
# define __msan_unpoison(p, size)
|
|
#endif
|
|
|
|
/// \macro LLVM_MEMORY_SANITIZER_BUILD
|
|
/// \brief Whether LLVM itself is built with MemorySanitizer instrumentation.
|
|
#if __has_feature(memory_sanitizer)
|
|
# define LLVM_MEMORY_SANITIZER_BUILD 1
|
|
#else
|
|
# define LLVM_MEMORY_SANITIZER_BUILD 0
|
|
#endif
|
|
|
|
/// \macro LLVM_ADDRESS_SANITIZER_BUILD
|
|
/// \brief Whether LLVM itself is built with AddressSanitizer instrumentation.
|
|
#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
|
|
# define LLVM_ADDRESS_SANITIZER_BUILD 1
|
|
#else
|
|
# define LLVM_ADDRESS_SANITIZER_BUILD 0
|
|
#endif
|
|
|
|
/// \macro LLVM_IS_UNALIGNED_ACCESS_FAST
|
|
/// \brief Is unaligned memory access fast on the host machine.
|
|
///
|
|
/// Don't specialize on alignment for platforms where unaligned memory accesses
|
|
/// generates the same code as aligned memory accesses for common types.
|
|
#if defined(_M_AMD64) || defined(_M_IX86) || defined(__amd64) || \
|
|
defined(__amd64__) || defined(__x86_64) || defined(__x86_64__) || \
|
|
defined(_X86_) || defined(__i386) || defined(__i386__)
|
|
# define LLVM_IS_UNALIGNED_ACCESS_FAST 1
|
|
#else
|
|
# define LLVM_IS_UNALIGNED_ACCESS_FAST 0
|
|
#endif
|
|
|
|
#endif
|