[Bug middle-end/41098] New: We should be better in folding pow with integer powers

[rguenth at gcc dot gnu dot org]

There are a bunch of missed-optimizations in fold_builtin_pow where we restrict
foldings to cases of non-negative base even when the power is an integer.

One source of easy missed optimizations is that fold folds x * x to pow (x,
2.0)
instead of powi (x, 2) which would make further analysis easier.


-- 
           Summary: We should be better in folding pow with integer powers
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41098