diff options
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 53 |
1 files changed, 47 insertions, 6 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index f7de840..c81fbaf 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -72,20 +72,20 @@ #define LLVM_NOEXCEPT #endif -/// \brief Does the compiler support r-value reference *this? +/// \brief Does the compiler support ref-qualifiers for *this? /// -/// Sadly, this is separate from just r-value reference support because GCC -/// implemented this later than everything else. +/// 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 r-value references are supported. +/// Expands to '&' if ref-qualifiers for *this 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 +/// 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 @@ -223,6 +223,16 @@ #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_EXTENSION - Support compilers where we have a keyword to suppress /// pedantic diagnostics. #ifdef __GNUC__ @@ -281,6 +291,37 @@ # define LLVM_ASSUME_ALIGNED(p, a) (p) #endif +/// \macro LLVM_ALIGNAS +/// \brief Used to specify a minimum alignment for a structure or variable. The +/// alignment must be a constant integer. Use LLVM_PTR_SIZE to compute +/// alignments in terms of the size of a pointer. +/// +/// Note that __declspec(align) has special quirks, it's not legal to pass a +/// structure with __declspec(align) as a formal parameter. +#ifdef _MSC_VER +# define LLVM_ALIGNAS(x) __declspec(align(x)) +#elif __GNUC__ && !__has_feature(cxx_alignas) && !LLVM_GNUC_PREREQ(4, 8, 0) +# define LLVM_ALIGNAS(x) __attribute__((aligned(x))) +#else +# define LLVM_ALIGNAS(x) alignas(x) +#endif + +/// \macro LLVM_PTR_SIZE +/// \brief A constant integer equivalent to the value of sizeof(void*). +/// Generally used in combination with LLVM_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_FUNCTION_NAME /// \brief Expands to __func__ on compilers which support it. Otherwise, /// expands to a compiler-dependent replacement. |