[Bug tree-optimization/42286] October 23rd change to tree-ssa-pre.c breaks calculix on powerpc with -ffast-math

[dje at gcc dot gnu dot org]

------- Comment #5 from dje at gcc dot gnu dot org  2010-01-05 15:47 -------
sqrt(-0) = -0  and 0 is a discontinuity for atan2

Either sqrt should return +0 or atan2 should force +0 if games with signed
zeros are allowed.


-- 

dje at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-01-05 15:47:15
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42286