[Bug target/62147] missed loop counter based optimization

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62147

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|powerpc64le                 |powerpc64*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-08-16
                 CC|                            |segher at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed, on powerpc64 with default tuning.

-m32 generates bdnz just fine.
Using a different limit (as in your code comment)
doesn't help.
Using long int instead of int does work.

The ivopts pass thinks using the pointer as loop
counter is cheapest.