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Diffstat (limited to 'third_party/llvm-project/include/llvm/Support/Compiler.h')
| -rw-r--r-- | third_party/llvm-project/include/llvm/Support/Compiler.h | 585 |
1 files changed, 585 insertions, 0 deletions
diff --git a/third_party/llvm-project/include/llvm/Support/Compiler.h b/third_party/llvm-project/include/llvm/Support/Compiler.h new file mode 100644 index 000000000..cb7e57d4c --- /dev/null +++ b/third_party/llvm-project/include/llvm/Support/Compiler.h @@ -0,0 +1,585 @@ +//===-- 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" + +#ifdef __cplusplus +#include <new> +#endif +#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 +#ifdef _MSC_VER +#define LLVM_MSC_PREREQ(version) (_MSC_VER >= (version)) + +// We require at least MSVC 2017. +#if !LLVM_MSC_PREREQ(1910) +#error LLVM requires at least MSVC 2017. +#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. +#if __has_feature(cxx_rvalue_references) || LLVM_GNUC_PREREQ(4, 8, 1) +#define LLVM_HAS_RVALUE_REFERENCE_THIS 1 +#else +#define LLVM_HAS_RVALUE_REFERENCE_THIS 0 +#endif + +/// 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. +#if (__has_attribute(visibility) || LLVM_GNUC_PREREQ(4, 0, 0)) && \ + !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(_WIN32) +#define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden"))) +#else +#define LLVM_LIBRARY_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) || LLVM_GNUC_PREREQ(3, 1, 0) +#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 __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) || LLVM_GNUC_PREREQ(3, 1, 0) +#define LLVM_ATTRIBUTE_UNUSED __attribute__((__unused__)) +#else +#define LLVM_ATTRIBUTE_UNUSED +#endif + +// FIXME: Provide this for PE/COFF targets. +#if (__has_attribute(weak) || LLVM_GNUC_PREREQ(4, 0, 0)) && \ + (!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_builtin(__builtin_expect) || LLVM_GNUC_PREREQ(4, 0, 0) +#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) || LLVM_GNUC_PREREQ(3, 4, 0) +#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 __has_attribute(always_inline) || LLVM_GNUC_PREREQ(4, 0, 0) +#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 + +#if __has_attribute(returns_nonnull) || LLVM_GNUC_PREREQ(4, 9, 0) +#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 __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_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 __has_builtin(__builtin_unreachable) || LLVM_GNUC_PREREQ(4, 5, 0) +# 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) || LLVM_GNUC_PREREQ(4, 3, 0) +# 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) || LLVM_GNUC_PREREQ(4, 7, 0) +# define LLVM_ASSUME_ALIGNED(p, a) __builtin_assume_aligned(p, a) +#elif defined(LLVM_BUILTIN_UNREACHABLE) +// As of today, clang does not support __builtin_assume_aligned. +# 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> +#else +# define LLVM_MEMORY_SANITIZER_BUILD 0 +# define __msan_allocated_memory(p, size) +# define __msan_unpoison(p, size) +#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, and uses that when available. However, it falls back on +/// platform-specific or vendor-provided extensions when necessary. These +/// extensions don'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) +#define LLVM_THREAD_LOCAL thread_local +#elif defined(_MSC_VER) +// MSVC supports this with a __declspec. +#define LLVM_THREAD_LOCAL __declspec(thread) +#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 + +#ifdef __cplusplus +namespace llvm { + +/// Allocate a buffer of memory with the given size and alignment. +/// +/// When the compiler supports aligned operator new, this will use it to to +/// handle even over-aligned allocations. +/// +/// However, this doesn't make any attempt to leverage the fancier techniques +/// like posix_memalign due to portability. It is mostly intended to allow +/// compatibility with platforms that, after aligned allocation was added, use +/// reduced default alignment. +inline void *allocate_buffer(size_t Size, size_t Alignment) { + return ::operator new(Size +#ifdef __cpp_aligned_new + , + std::align_val_t(Alignment) +#endif + ); +} + +/// Deallocate a buffer of memory with the given size and alignment. +/// +/// If supported, this will used the sized delete operator. Also if supported, +/// this will pass the alignment to the delete operator. +/// +/// The pointer must have been allocated with the corresponding new operator, +/// most likely using the above helper. +inline void deallocate_buffer(void *Ptr, size_t Size, size_t Alignment) { + ::operator delete(Ptr +#ifdef __cpp_sized_deallocation + , + Size +#endif +#ifdef __cpp_aligned_new + , + std::align_val_t(Alignment) +#endif + ); +} + +} // End namespace llvm + +#endif // __cplusplus +#endif |