[Bug tree-optimization/90838] Detect table-based ctz implementation

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90838

Wilco <wilco at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-08-09
           Assignee|unassigned at gcc dot gnu.org      |wilco at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #7 from Wilco <wilco at gcc dot gnu.org> ---
I'll have a look at this, I think it could easily be done in match.pd if we add
support for matching array references.