| //===-- 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 |
| |
| #ifndef __has_include |
| # define __has_include(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 |
| |
| /// 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. |
| /// |
| /// '#else' is intentionally left out so that other macro logic (e.g., |
| /// LLVM_ASSUME_ALIGNED and llvm_unreachable()) can detect whether |
| /// LLVM_BUILTIN_UNREACHABLE has a definition. |
| #if __has_builtin(__builtin_unreachable) || defined(__GNUC__) |
| # 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 __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 |
| #if __has_include(<sanitizer/asan_interface.h>) |
| # include <sanitizer/asan_interface.h> |
| #else |
| // These declarations exist to support ASan with MSVC. If MSVC eventually ships |
| // asan_interface.h in their headers, then we can remove this. |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| void __asan_poison_memory_region(void const volatile *addr, size_t size); |
| void __asan_unpoison_memory_region(void const volatile *addr, size_t size); |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| #endif |
| #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 |