diff options
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index 36539f6d34..6ca86bdd50 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -311,4 +311,17 @@ # define LLVM_MEMORY_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 |