[PATCH] clang-cl: Use MS C++ ABI

[Hans Wennborg]

================
Comment at: lib/Driver/Tools.cpp:3728
@@ +3727,3 @@
+
+  CmdArgs.push_back("-cxx-abi");
+  CmdArgs.push_back("microsoft");
----------------
Reid Kleckner wrote:
> This should have a FIXME: Make this the default for the win32 triple.
> 
> Right now i686-pc-win32 + -cxx-abi itanium is a weird mismash of the C calling conventions plus the Itanium C++ runtime stuff that we should really eliminate.
Done.

================
Comment at: test/Driver/cl-abi.c:1
@@ +1,2 @@
+// Don't attempt slash switches on msys bash.
+// REQUIRES: shell-preserves-root
----------------
Reid Kleckner wrote:
> Let's try to have fewer test files.  I've read on the lists that more files basically makes lit slower.
OK. I've moved this test into test/Driver/cl.c instead.


http://llvm-reviews.chandlerc.com/D1329

COMMIT
  http://llvm-reviews.chandlerc.com/rL188000