[Bug rtl-optimization/44214] New: Compiler does not optimize vector divide with -freciprocal-math (or -ffast-math)

[meissner at gcc dot gnu dot org]

If you have code that does division by a constant that can be auto vectorized
by the compiler, the compiler does not convert the division to multiplication
by the reciprocal if -freciprocal-math (or -ffast-math), but instead does the
division.

The bug is in fold-const.c near line 11254, where the code for handling
REAL_CST should be cloned to handle VECTOR_CST (and presumably COMPLEX_CST
also).


-- 
           Summary: Compiler does not optimize vector divide with -
                    freciprocal-math (or -ffast-math)
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: meissner at gcc dot gnu dot org
 GCC build triplet: powerpc64-unknown-linux-gnu
  GCC host triplet: powerpc64-unknown-linux-gnu
GCC target triplet: powerpc64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44214