[llvm] r348042 - Support: use std::is_trivially_copyable on MSVC

[Saleem Abdulrasool via llvm-commits]

Author: compnerd
Date: Fri Nov 30 14:13:42 2018
New Revision: 348042

URL: http://llvm.org/viewvc/llvm-project?rev=348042&view=rev
Log:
Support: use std::is_trivially_copyable on MSVC

MSVC 2015 and newer have std::is_trivially_copyable available for use.
We should prefer that over the std::is_class to get this check be
correct.

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=348042&r1=348041&r2=348042&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/type_traits.h (original)
+++ llvm/trunk/include/llvm/Support/type_traits.h Fri Nov 30 14:13:42 2018
@@ -30,9 +30,10 @@ namespace llvm {
 template <typename T>
 struct isPodLike {
   // std::is_trivially_copyable is available in libc++ with clang, libstdc++
-  // that comes with GCC 5.
+  // that comes with GCC 5.  MSVC 2015 and newer also have
+  // std::is_trivially_copyable.
 #if (__has_feature(is_trivially_copyable) && defined(_LIBCPP_VERSION)) ||      \
-    (defined(__GNUC__) && __GNUC__ >= 5)
+    (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;