[Bug middle-end/18902] New: Naive (default) complex division algorithm

[pcarlini at suse dot de]

Apparently, the default algorithm (the other one available is selectable via
flag_complex_divide_method = 1) is the naive one, which is not able to deal
correctly with "large" denominators. For some additional details, see:

  http://gcc.gnu.org/ml/gcc-bugs/2004-12/msg00820.html

I'm attaching a trivial, pure C, testcase, showing at least inconsistency in the
behaviors for real vs complex types. Swithing to flag_complex_divide_method = 1
fixes simple testcases, but maybe we really want the full C99-conforming algo,
as sketched in Annex G. In that case this would be a (high priority ;) request
for enhancement.

-- 
           Summary: Naive (default) complex division algorithm
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pcarlini at suse dot de
                CC: bkoz at redhat dot com,gcc-bugs at gcc dot gnu dot
                    org,gdr at integrable-solutions dot net
 GCC build triplet: Any
  GCC host triplet: Any
GCC target triplet: Any


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18902