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- #pragma once
- #ifdef __GNUC__
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wunused-parameter"
- #endif
- //===-- llvm/Support/Compiler.h - Compiler abstraction support --*- 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 defines several macros, based on the current compiler. This allows
- // use of compiler-specific features in a way that remains portable. This header
- // can be included from either C or C++.
- //
- //===----------------------------------------------------------------------===//
- #ifndef LLVM_SUPPORT_COMPILER_H
- #define LLVM_SUPPORT_COMPILER_H
- #include "llvm/Config/llvm-config.h"
- #include <stddef.h>
- #if defined(_MSC_VER)
- #include <sal.h>
- #endif
- #ifndef __has_feature
- # define __has_feature(x) 0
- #endif
- #ifndef __has_extension
- # define __has_extension(x) 0
- #endif
- #ifndef __has_attribute
- # define __has_attribute(x) 0
- #endif
- #ifndef __has_builtin
- # define __has_builtin(x) 0
- #endif
- // Only use __has_cpp_attribute in C++ mode. GCC defines __has_cpp_attribute in
- // C mode, but the :: in __has_cpp_attribute(scoped::attribute) is invalid.
- #ifndef LLVM_HAS_CPP_ATTRIBUTE
- #if defined(__cplusplus) && defined(__has_cpp_attribute)
- # define LLVM_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
- #else
- # define LLVM_HAS_CPP_ATTRIBUTE(x) 0
- #endif
- #endif
- /// \macro LLVM_GNUC_PREREQ
- /// Extend the default __GNUC_PREREQ even if glibc's features.h isn't
- /// available.
- #ifndef LLVM_GNUC_PREREQ
- # if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
- # define LLVM_GNUC_PREREQ(maj, min, patch) \
- ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
- ((maj) << 20) + ((min) << 10) + (patch))
- # elif defined(__GNUC__) && defined(__GNUC_MINOR__)
- # define LLVM_GNUC_PREREQ(maj, min, patch) \
- ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
- # else
- # define LLVM_GNUC_PREREQ(maj, min, patch) 0
- # endif
- #endif
- /// \macro LLVM_MSC_PREREQ
- /// Is the compiler MSVC of at least the specified version?
- /// The common \param version values to check for are:
- /// * 1910: VS2017, version 15.1 & 15.2
- /// * 1911: VS2017, version 15.3 & 15.4
- /// * 1912: VS2017, version 15.5
- /// * 1913: VS2017, version 15.6
- /// * 1914: VS2017, version 15.7
- /// * 1915: VS2017, version 15.8
- /// * 1916: VS2017, version 15.9
- /// * 1920: VS2019, version 16.0
- /// * 1921: VS2019, version 16.1
- /// * 1922: VS2019, version 16.2
- /// * 1923: VS2019, version 16.3
- /// * 1924: VS2019, version 16.4
- /// * 1925: VS2019, version 16.5
- /// * 1926: VS2019, version 16.6
- /// * 1927: VS2019, version 16.7
- /// * 1928: VS2019, version 16.8 + 16.9
- /// * 1929: VS2019, version 16.10 + 16.11
- /// * 1930: VS2022, version 17.0
- #ifdef _MSC_VER
- #define LLVM_MSC_PREREQ(version) (_MSC_VER >= (version))
- // We require at least VS 2019.
- #if !defined(LLVM_FORCE_USE_OLD_TOOLCHAIN)
- #if !LLVM_MSC_PREREQ(1920)
- #error LLVM requires at least VS 2019.
- #endif
- #endif
- #else
- #define LLVM_MSC_PREREQ(version) 0
- #endif
- /// Does the compiler support ref-qualifiers for *this?
- ///
- /// Sadly, this is separate from just rvalue reference support because GCC
- /// and MSVC implemented this later than everything else. This appears to be
- /// corrected in MSVC 2019 but not MSVC 2017.
- /// FIXME: Remove LLVM_HAS_RVALUE_REFERENCE_THIS macro
- #define LLVM_HAS_RVALUE_REFERENCE_THIS 1
- /// Expands to '&' if ref-qualifiers for *this are supported.
- ///
- /// This can be used to provide lvalue/rvalue overrides of member functions.
- /// The rvalue 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_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.
- /// On PE/COFF targets, library visibility is the default, so this isn't needed.
- ///
- /// LLVM_EXTERNAL_VISIBILITY - classes, functions, and variables marked with
- /// this attribute will be made public and visible outside of any shared library
- /// they are linked in to.
- #if __has_attribute(visibility) && !defined(__MINGW32__) && \
- !defined(__CYGWIN__) && !defined(_WIN32)
- #define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
- #if defined(LLVM_BUILD_LLVM_DYLIB) || defined(LLVM_BUILD_SHARED_LIBS)
- #define LLVM_EXTERNAL_VISIBILITY __attribute__((visibility("default")))
- #else
- #define LLVM_EXTERNAL_VISIBILITY
- #endif
- #else
- #define LLVM_LIBRARY_VISIBILITY
- #define LLVM_EXTERNAL_VISIBILITY
- #endif
- #if defined(__GNUC__)
- #define LLVM_PREFETCH(addr, rw, locality) __builtin_prefetch(addr, rw, locality)
- #else
- #define LLVM_PREFETCH(addr, rw, locality)
- #endif
- #if __has_attribute(used)
- #define LLVM_ATTRIBUTE_USED __attribute__((__used__))
- #else
- #define LLVM_ATTRIBUTE_USED
- #endif
- /// LLVM_NODISCARD - Warn if a type or return value is discarded.
- // Use the 'nodiscard' attribute in C++17 or newer mode.
- #if defined(__cplusplus) && __cplusplus > 201402L && LLVM_HAS_CPP_ATTRIBUTE(nodiscard)
- #define LLVM_NODISCARD [[nodiscard]]
- #elif LLVM_HAS_CPP_ATTRIBUTE(clang::warn_unused_result)
- #define LLVM_NODISCARD [[clang::warn_unused_result]]
- // Clang in C++14 mode claims that it has the 'nodiscard' attribute, but also
- // warns in the pedantic mode that 'nodiscard' is a C++17 extension (PR33518).
- // Use the 'nodiscard' attribute in C++14 mode only with GCC.
- // TODO: remove this workaround when PR33518 is resolved.
- #elif defined(__GNUC__) && LLVM_HAS_CPP_ATTRIBUTE(nodiscard)
- #define LLVM_NODISCARD [[nodiscard]]
- #else
- #define LLVM_NODISCARD
- #endif
- // Indicate that a non-static, non-const C++ member function reinitializes
- // the entire object to a known state, independent of the previous state of
- // the object.
- //
- // The clang-tidy check bugprone-use-after-move recognizes this attribute as a
- // marker that a moved-from object has left the indeterminate state and can be
- // reused.
- #if LLVM_HAS_CPP_ATTRIBUTE(clang::reinitializes)
- #define LLVM_ATTRIBUTE_REINITIALIZES [[clang::reinitializes]]
- #else
- #define LLVM_ATTRIBUTE_REINITIALIZES
- #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 __has_attribute(unused)
- #define LLVM_ATTRIBUTE_UNUSED __attribute__((__unused__))
- #else
- #define LLVM_ATTRIBUTE_UNUSED
- #endif
- // FIXME: Provide this for PE/COFF targets.
- #if __has_attribute(weak) && !defined(__MINGW32__) && !defined(__CYGWIN__) && \
- !defined(_WIN32)
- #define LLVM_ATTRIBUTE_WEAK __attribute__((__weak__))
- #else
- #define LLVM_ATTRIBUTE_WEAK
- #endif
- // Prior to clang 3.2, clang did not accept any spelling of
- // __has_attribute(const), so assume it is supported.
- #if defined(__clang__) || defined(__GNUC__)
- // aka 'CONST' but following LLVM Conventions.
- #define LLVM_READNONE __attribute__((__const__))
- #else
- #define LLVM_READNONE
- #endif
- #if __has_attribute(pure) || defined(__GNUC__)
- // aka 'PURE' but following LLVM Conventions.
- #define LLVM_READONLY __attribute__((__pure__))
- #else
- #define LLVM_READONLY
- #endif
- #if __has_attribute(minsize)
- #define LLVM_ATTRIBUTE_MINSIZE __attribute__((minsize))
- #else
- #define LLVM_ATTRIBUTE_MINSIZE
- #endif
- #if __has_builtin(__builtin_expect) || defined(__GNUC__)
- #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
- /// LLVM_ATTRIBUTE_NOINLINE - On compilers where we have a directive to do so,
- /// mark a method "not for inlining".
- #if __has_attribute(noinline)
- #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.
- #if __has_attribute(always_inline)
- #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 inline
- #endif
- /// LLVM_ATTRIBUTE_NO_DEBUG - On compilers where we have a directive to do
- /// so, mark a method "no debug" because debug info makes the debugger
- /// experience worse.
- #if __has_attribute(nodebug)
- #define LLVM_ATTRIBUTE_NODEBUG __attribute__((nodebug))
- #else
- #define LLVM_ATTRIBUTE_NODEBUG
- #endif
- #if __has_attribute(returns_nonnull)
- #define LLVM_ATTRIBUTE_RETURNS_NONNULL __attribute__((returns_nonnull))
- #elif defined(_MSC_VER)
- #define LLVM_ATTRIBUTE_RETURNS_NONNULL _Ret_notnull_
- #else
- #define LLVM_ATTRIBUTE_RETURNS_NONNULL
- #endif
- /// \macro LLVM_ATTRIBUTE_RETURNS_NOALIAS Used to mark a function as returning a
- /// pointer that does not alias any other valid pointer.
- #ifdef __GNUC__
- #define LLVM_ATTRIBUTE_RETURNS_NOALIAS __attribute__((__malloc__))
- #elif defined(_MSC_VER)
- #define LLVM_ATTRIBUTE_RETURNS_NOALIAS __declspec(restrict)
- #else
- #define LLVM_ATTRIBUTE_RETURNS_NOALIAS
- #endif
- /// LLVM_FALLTHROUGH - Mark fallthrough cases in switch statements.
- #if defined(__cplusplus) && __cplusplus > 201402L && LLVM_HAS_CPP_ATTRIBUTE(fallthrough)
- #define LLVM_FALLTHROUGH [[fallthrough]]
- #elif LLVM_HAS_CPP_ATTRIBUTE(gnu::fallthrough)
- #define LLVM_FALLTHROUGH [[gnu::fallthrough]]
- #elif __has_attribute(fallthrough)
- #define LLVM_FALLTHROUGH __attribute__((fallthrough))
- #elif LLVM_HAS_CPP_ATTRIBUTE(clang::fallthrough)
- #define LLVM_FALLTHROUGH [[clang::fallthrough]]
- #else
- #define LLVM_FALLTHROUGH
- #endif
- /// LLVM_REQUIRE_CONSTANT_INITIALIZATION - Apply this to globals to ensure that
- /// they are constant initialized.
- #if LLVM_HAS_CPP_ATTRIBUTE(clang::require_constant_initialization)
- #define LLVM_REQUIRE_CONSTANT_INITIALIZATION \
- [[clang::require_constant_initialization]]
- #else
- #define LLVM_REQUIRE_CONSTANT_INITIALIZATION
- #endif
- /// LLVM_GSL_OWNER - Apply this to owning classes like SmallVector to enable
- /// lifetime warnings.
- #if LLVM_HAS_CPP_ATTRIBUTE(gsl::Owner)
- #define LLVM_GSL_OWNER [[gsl::Owner]]
- #else
- #define LLVM_GSL_OWNER
- #endif
- /// LLVM_GSL_POINTER - Apply this to non-owning classes like
- /// StringRef to enable lifetime warnings.
- #if LLVM_HAS_CPP_ATTRIBUTE(gsl::Pointer)
- #define LLVM_GSL_POINTER [[gsl::Pointer]]
- #else
- #define LLVM_GSL_POINTER
- #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")
- // This macro will be removed.
- // Use C++14's attribute instead: [[deprecated("message")]]
- #define LLVM_ATTRIBUTE_DEPRECATED(decl, message) [[deprecated(message)]] decl
- /// 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 __has_builtin(__builtin_unreachable) || defined(__GNUC__)
- # define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable()
- #elif defined(_MSC_VER)
- # define LLVM_BUILTIN_UNREACHABLE __assume(false)
- #else
- # define LLVM_BUILTIN_UNREACHABLE
- #endif
- /// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression
- /// which causes the program to exit abnormally.
- #if __has_builtin(__builtin_trap) || defined(__GNUC__)
- # define LLVM_BUILTIN_TRAP __builtin_trap()
- #elif defined(_MSC_VER)
- // The __debugbreak intrinsic is supported by MSVC, does not require forward
- // declarations involving platform-specific typedefs (unlike RaiseException),
- // results in a call to vectored exception handlers, and encodes to a short
- // instruction that still causes the trapping behavior we want.
- # define LLVM_BUILTIN_TRAP __debugbreak()
- #else
- # define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0
- #endif
- /// LLVM_BUILTIN_DEBUGTRAP - On compilers which support it, expands to
- /// an expression which causes the program to break while running
- /// under a debugger.
- #if __has_builtin(__builtin_debugtrap)
- # define LLVM_BUILTIN_DEBUGTRAP __builtin_debugtrap()
- #elif defined(_MSC_VER)
- // The __debugbreak intrinsic is supported by MSVC and breaks while
- // running under the debugger, and also supports invoking a debugger
- // when the OS is configured appropriately.
- # define LLVM_BUILTIN_DEBUGTRAP __debugbreak()
- #else
- // Just continue execution when built with compilers that have no
- // support. This is a debugging aid and not intended to force the
- // program to abort if encountered.
- # define LLVM_BUILTIN_DEBUGTRAP
- #endif
- /// \macro LLVM_ASSUME_ALIGNED
- /// Returns a pointer with an assumed alignment.
- #if __has_builtin(__builtin_assume_aligned) || defined(__GNUC__)
- # 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_PACKED
- /// Used to specify a packed structure.
- /// LLVM_PACKED(
- /// struct A {
- /// int i;
- /// int j;
- /// int k;
- /// long long l;
- /// });
- ///
- /// LLVM_PACKED_START
- /// struct B {
- /// int i;
- /// int j;
- /// int k;
- /// long long l;
- /// };
- /// LLVM_PACKED_END
- #ifdef _MSC_VER
- # define LLVM_PACKED(d) __pragma(pack(push, 1)) d __pragma(pack(pop))
- # define LLVM_PACKED_START __pragma(pack(push, 1))
- # define LLVM_PACKED_END __pragma(pack(pop))
- #else
- # define LLVM_PACKED(d) d __attribute__((packed))
- # define LLVM_PACKED_START _Pragma("pack(push, 1)")
- # define LLVM_PACKED_END _Pragma("pack(pop)")
- #endif
- /// \macro LLVM_PTR_SIZE
- /// A constant integer equivalent to the value of sizeof(void*).
- /// Generally used in combination with alignas or when doing computation in the
- /// preprocessor.
- #ifdef __SIZEOF_POINTER__
- # define LLVM_PTR_SIZE __SIZEOF_POINTER__
- #elif defined(_WIN64)
- # define LLVM_PTR_SIZE 8
- #elif defined(_WIN32)
- # define LLVM_PTR_SIZE 4
- #elif defined(_MSC_VER)
- # error "could not determine LLVM_PTR_SIZE as a constant int for MSVC"
- #else
- # define LLVM_PTR_SIZE sizeof(void *)
- #endif
- /// \macro LLVM_MEMORY_SANITIZER_BUILD
- /// Whether LLVM itself is built with MemorySanitizer instrumentation.
- #if __has_feature(memory_sanitizer)
- # define LLVM_MEMORY_SANITIZER_BUILD 1
- # include <sanitizer/msan_interface.h>
- # define LLVM_NO_SANITIZE_MEMORY_ATTRIBUTE __attribute__((no_sanitize_memory))
- #else
- # define LLVM_MEMORY_SANITIZER_BUILD 0
- # define __msan_allocated_memory(p, size)
- # define __msan_unpoison(p, size)
- # define LLVM_NO_SANITIZE_MEMORY_ATTRIBUTE
- #endif
- /// \macro LLVM_ADDRESS_SANITIZER_BUILD
- /// Whether LLVM itself is built with AddressSanitizer instrumentation.
- #if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
- # define LLVM_ADDRESS_SANITIZER_BUILD 1
- # include <sanitizer/asan_interface.h>
- #else
- # define LLVM_ADDRESS_SANITIZER_BUILD 0
- # define __asan_poison_memory_region(p, size)
- # define __asan_unpoison_memory_region(p, size)
- #endif
- /// \macro LLVM_THREAD_SANITIZER_BUILD
- /// Whether LLVM itself is built with ThreadSanitizer instrumentation.
- #if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)
- # define LLVM_THREAD_SANITIZER_BUILD 1
- #else
- # define LLVM_THREAD_SANITIZER_BUILD 0
- #endif
- #if LLVM_THREAD_SANITIZER_BUILD
- // Thread Sanitizer is a tool that finds races in code.
- // See http://code.google.com/p/data-race-test/wiki/DynamicAnnotations .
- // tsan detects these exact functions by name.
- #ifdef __cplusplus
- extern "C" {
- #endif
- void AnnotateHappensAfter(const char *file, int line, const volatile void *cv);
- void AnnotateHappensBefore(const char *file, int line, const volatile void *cv);
- void AnnotateIgnoreWritesBegin(const char *file, int line);
- void AnnotateIgnoreWritesEnd(const char *file, int line);
- #ifdef __cplusplus
- }
- #endif
- // This marker is used to define a happens-before arc. The race detector will
- // infer an arc from the begin to the end when they share the same pointer
- // argument.
- # define TsanHappensBefore(cv) AnnotateHappensBefore(__FILE__, __LINE__, cv)
- // This marker defines the destination of a happens-before arc.
- # define TsanHappensAfter(cv) AnnotateHappensAfter(__FILE__, __LINE__, cv)
- // Ignore any races on writes between here and the next TsanIgnoreWritesEnd.
- # define TsanIgnoreWritesBegin() AnnotateIgnoreWritesBegin(__FILE__, __LINE__)
- // Resume checking for racy writes.
- # define TsanIgnoreWritesEnd() AnnotateIgnoreWritesEnd(__FILE__, __LINE__)
- #else
- # define TsanHappensBefore(cv)
- # define TsanHappensAfter(cv)
- # define TsanIgnoreWritesBegin()
- # define TsanIgnoreWritesEnd()
- #endif
- /// \macro LLVM_NO_SANITIZE
- /// Disable a particular sanitizer for a function.
- #if __has_attribute(no_sanitize)
- #define LLVM_NO_SANITIZE(KIND) __attribute__((no_sanitize(KIND)))
- #else
- #define LLVM_NO_SANITIZE(KIND)
- #endif
- /// Mark debug helper function definitions like dump() that should not be
- /// stripped from debug builds.
- /// Note that you should also surround dump() functions with
- /// `#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)` so they do always
- /// get stripped in release builds.
- // FIXME: Move this to a private config.h as it's not usable in public headers.
- #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
- #define LLVM_DUMP_METHOD LLVM_ATTRIBUTE_NOINLINE LLVM_ATTRIBUTE_USED
- #else
- #define LLVM_DUMP_METHOD LLVM_ATTRIBUTE_NOINLINE
- #endif
- /// \macro LLVM_PRETTY_FUNCTION
- /// Gets a user-friendly looking function signature for the current scope
- /// using the best available method on each platform. The exact format of the
- /// resulting string is implementation specific and non-portable, so this should
- /// only be used, for example, for logging or diagnostics.
- #if defined(_MSC_VER)
- #define LLVM_PRETTY_FUNCTION __FUNCSIG__
- #elif defined(__GNUC__) || defined(__clang__)
- #define LLVM_PRETTY_FUNCTION __PRETTY_FUNCTION__
- #else
- #define LLVM_PRETTY_FUNCTION __func__
- #endif
- /// \macro LLVM_THREAD_LOCAL
- /// A thread-local storage specifier which can be used with globals,
- /// extern globals, and static globals.
- ///
- /// This is essentially an extremely restricted analog to C++11's thread_local
- /// support. It uses thread_local if available, falling back on gcc __thread
- /// if not. __thread doesn't support many of the C++11 thread_local's
- /// features. You should only use this for PODs that you can statically
- /// initialize to some constant value. In almost all circumstances this is most
- /// appropriate for use with a pointer, integer, or small aggregation of
- /// pointers and integers.
- #if LLVM_ENABLE_THREADS
- #if __has_feature(cxx_thread_local) || defined(_MSC_VER)
- #define LLVM_THREAD_LOCAL thread_local
- #else
- // Clang, GCC, and other compatible compilers used __thread prior to C++11 and
- // we only need the restricted functionality that provides.
- #define LLVM_THREAD_LOCAL __thread
- #endif
- #else // !LLVM_ENABLE_THREADS
- // If threading is disabled entirely, this compiles to nothing and you get
- // a normal global variable.
- #define LLVM_THREAD_LOCAL
- #endif
- /// \macro LLVM_ENABLE_EXCEPTIONS
- /// Whether LLVM is built with exception support.
- #if __has_feature(cxx_exceptions)
- #define LLVM_ENABLE_EXCEPTIONS 1
- #elif defined(__GNUC__) && defined(__EXCEPTIONS)
- #define LLVM_ENABLE_EXCEPTIONS 1
- #elif defined(_MSC_VER) && defined(_CPPUNWIND)
- #define LLVM_ENABLE_EXCEPTIONS 1
- #endif
- /// \macro LLVM_NO_PROFILE_INSTRUMENT_FUNCTION
- /// Disable the profile instrument for a function.
- #if __has_attribute(no_profile_instrument_function)
- #define LLVM_NO_PROFILE_INSTRUMENT_FUNCTION \
- __attribute__((no_profile_instrument_function))
- #else
- #define LLVM_NO_PROFILE_INSTRUMENT_FUNCTION
- #endif
- #endif
- #ifdef __GNUC__
- #pragma GCC diagnostic pop
- #endif
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