[PATCH] Add FileCheck -implicit-check-not option to allow stricter tests without adding too many CHECK-NOTs manually.

[Alexander Kornienko]

>>! In D4462#6, @djasper wrote:
> I don't think it is sufficient to have a test in clang-tools-extra...

Sure, this is why I wrote "Once there's an agreement on the general direction, I can add tests and documentation.", where by "tests" I meant standalone tests for FileCheck.

http://reviews.llvm.org/D4462