[analyzer] scan-build: support -enable-checker with new Xcode integration.

<rdar://problem/13772094>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180812 91177308-0d34-0410-b5e6-96231b3b80d8
[driver] Allow multiple -arch options with -save-temps by adding the arch name
to the temporary files.
rdar://13218604


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180813 91177308-0d34-0410-b5e6-96231b3b80d8
Do not generate VLAs as complex variables any more, as they are now
correctly represented as breg+0 locations in the backend.

(Paired commit with LLVM: r180815)

rdar://problem/13658587

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180817 91177308-0d34-0410-b5e6-96231b3b80d8
Fix PR15845: apparently MSVC does not support implicit int in C++ mode.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180822 91177308-0d34-0410-b5e6-96231b3b80d8
Revert 180817 because 180816 was reverted.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180823 91177308-0d34-0410-b5e6-96231b3b80d8