From f4b269bdf0147402d1aee7d68db57a09640d00f6 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Fri, 20 Feb 2015 16:19:28 +0000 Subject: [PATCH] Base isPodLike on is_trivially_copyable for GCC 5 and MSVC It would be nice to get rid of the version checks here, but that will have to wait until libstdc++ is upgraded to 5.0 everywhere ... llvm-svn: 230021 --- llvm/include/llvm/Support/type_traits.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/llvm/include/llvm/Support/type_traits.h b/llvm/include/llvm/Support/type_traits.h index 70953a9..1befe92 100644 --- a/llvm/include/llvm/Support/type_traits.h +++ b/llvm/include/llvm/Support/type_traits.h @@ -28,9 +28,17 @@ namespace llvm { /// type can be copied around with memcpy instead of running ctors etc. template struct isPodLike { -#if __has_feature(is_trivially_copyable) + // std::is_trivially copyable is available in libc++ with clang, libstdc++ + // that comes with GCC 5 and MSVC 2013. +#if (__has_feature(is_trivially_copyable) && defined(_LIBCPP_VERSION)) || \ + (defined(__GNUC__) && __GNUC__ >= 5) || defined(_MSC_VER) // If the compiler supports the is_trivially_copyable trait use it, as it // matches the definition of isPodLike closely. + static const bool value = std::is_trivially_copyable::value; +#elif __has_feature(is_trivially_copyable) + // Use the internal name if the compiler supports is_trivially_copyable but we + // don't know if the standard library does. This is the case for clang in + // conjunction with libstdc++ from GCC 4.x. static const bool value = __is_trivially_copyable(T); #else // If we don't know anything else, we can (at least) assume that all non-class -- 2.7.4