[PATCH] Adding TableGen patterns to auto-select TBM instructions

[Craig Topper]

  While this probably mathematically correct.

    def : Pat<(or GR32:$src, (sub -2, GR32:$src)),
              (BLCI_32rr GR32:$src)>;
    def : Pat<(or GR64:$src, (sub -2, GR64:$src)),
              (BLCI_64rr GR64:$src)>;

  Don't the docs from AMD say something that would be  (or GR64:$src, (not (add GR64:$src, 1)))?

http://llvm-reviews.chandlerc.com/D1788