clang-cl: Expose the -ferror-limit= option

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199828 91177308-0d34-0410-b5e6-96231b3b80d8
When a special member is explicitly defaulted outside its class, and we reject
the defaulting because it would delete the member, produce additional notes
explaining why the member is implicitly deleted.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199829 91177308-0d34-0410-b5e6-96231b3b80d8
Handle va_arg on struct types for the le32 target (PNaCl and Emscripten)

PNaCl and Emscripten can both handle va_arg IR instructions with
struct type.

Also add a test to cover generating a va_arg IR instruction from
va_arg in C on le32 (as already handled by VisitVAArgExpr() in
CGExprScalar.cpp), which was not covered by a test before.

(This fixes https://code.google.com/p/nativeclient/issues/detail?id=2381)

Differential Revision: http://llvm-reviews.chandlerc.com/D2539

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199830 91177308-0d34-0410-b5e6-96231b3b80d8