[Bug tree-optimization/57492] Optimize 2.0**i to ldexp(1.0,i)

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57492

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-05-31
     Ever confirmed|0                           |1

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Confirmed. If you feel motivated, you can also handle 4.0**i, and then maybe
look at ldexp optimizations (with -ffast-math?) like 2*ldexp(1,i) or
ldexp(1,i+1) -> ldexp(2,i).