[PATCH] Add warning capabilities in LLVM (backend part), Take 2

[Renato Golin]

  Hi Quentin,

  To make sure I got it right, when I implement the DiagnosticVectorizerInfo class, I'll derive it from DiagnosticInfo, create a DK_VectorizationInfoKind before DK_FirsPluginKind and everything should just work, right?

  If that's the case, than I like this design (and now I understand Hal's proposal).

http://llvm-reviews.chandlerc.com/D2376