[Bug target/19506] New: PovRay produces wrong pictures with -mfpmath=sse -ffast-math.

["uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>]

I think it is a good idea to open a PR for this.

There is the problem description:
http://gcc.gnu.org/ml/gcc-patches/2005-01/msg00797.html

A kind of "fix" that shows that problem is related to FP compares:
http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01027.html

A comment from Richard Henderson:
http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01087.html

The proposed NaN trap didn't trigger, so there is no NaNs compared:
http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01096.html

This PR is not related to similar PR19496.

-- 
           Summary: PovRay produces wrong pictures with -mfpmath=sse -ffast-
                    math.
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: critical
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: uros at kss-loka dot si
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19506