[PATCH] MS ABI: Implement copy-ctor closures, finish implementing throw

[Reid Kleckner]

lgtm


================
Comment at: include/clang/Basic/ABI.h:28-29
@@ -29,1 +27,4 @@
+  Ctor_Comdat,         ///< The COMDAT used for ctors
+  Ctor_CopyingClosure, ///< Copying closure variant of a ctor
+  Ctor_DefaultClosure, ///< Default closure variant of a ctor
 };
----------------
rnk wrote:
> I'm not super psyched about adding to this enum. What do you think about adding custom entry points to the MS C++ ABI that just tweak internal bools?
Sure, if we think of this as just an enum of different constructor manglings, then I guess this is OK.

================
Comment at: test/CodeGenCXX/microsoft-abi-throw.cpp:78
@@ +77,3 @@
+
+struct Bad {
+  template <typename T>
----------------
Maybe s/Bad/DoubleDefault/?

http://reviews.llvm.org/D8225

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