[llvm] r230021 - Base isPodLike on is_trivially_copyable for GCC 5 and MSVC
Benjamin Kramer
benny.kra at googlemail.com
Fri Feb 20 08:19:29 PST 2015
Author: d0k
Date: Fri Feb 20 10:19:28 2015
New Revision: 230021
URL: http://llvm.org/viewvc/llvm-project?rev=230021&view=rev
Log:
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 ...
Modified:
llvm/trunk/include/llvm/Support/type_traits.h
Modified: llvm/trunk/include/llvm/Support/type_traits.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/type_traits.h?rev=230021&r1=230020&r2=230021&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/type_traits.h (original)
+++ llvm/trunk/include/llvm/Support/type_traits.h Fri Feb 20 10:19:28 2015
@@ -28,9 +28,17 @@ namespace llvm {
/// type can be copied around with memcpy instead of running ctors etc.
template <typename T>
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<T>::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
More information about the llvm-commits
mailing list