Question about sizeof(long double) on Win64

My team has been working on Win64 support, and we've learned that sizeof(long
double) is 8 bytes under Visual Studio (cl.exe), but 16 bytes under Clang with
-triple x86_64-win-pc32. Would the following change to the constructor for
WindowsX86_64TargetInfo be considered appropriate? I imagine no one has run
into this discrepancy because people aren't using Win64 support much?

If this is an OK change to make, let me know and I'll commit.

Thanks, John

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 683174e..4726b55 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1589,6 +1589,8 @@ public:
     WCharType = UnsignedShort;
     LongWidth = LongAlign = 32;
     DoubleAlign = LongLongAlign = 64;
+ LongDoubleWidth = 64;
+ LongDoubleAlign = 64;
     IntMaxType = SignedLongLong;
     UIntMaxType = UnsignedLongLong;
     Int64Type = SignedLongLong;

The idea is fine, but not the implementation; should be fixed with r128110.