Suppressing the C4324 warnings generated by MSVC. This is the only declarative instance that would generate the warning, but it accounted for about 525+ warnings due to template instantiations. This is a marginal-value warning which we may decide to disable more broadly, but since this header is in Support and may be used out of tree, it's a low burden for us to be warning-free in this case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235219 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/AlignOf.h

@@ -22,6 +22,11 @@ namespace llvm {
 template <typename T>
 struct AlignmentCalcImpl {
   char x;
+#if defined(_MSC_VER)
+// Disables "structure was padded due to __declspec(align())" warnings that are
+// generated by any class using AlignOf<T> with a manually specified alignment.
+#pragma warning(suppress : 4324)
+#endif
   T t;
 private:
   AlignmentCalcImpl() {} // Never instantiate.