[Bug tree-optimization/37449] [4.4 Regression] calculix gets wrong answer for -O1 -ffast-math

[jakub at gcc dot gnu dot org]

------- Comment #16 from jakub at gcc dot gnu dot org  2008-10-15 09:38 -------
After discussion with richi, I'd like to turn this into an enhancement request
for 4.5 to extend PRE/SCCVN to be able to optimize that:
  # cn_43 = PHI <-1.0e+0(4), 1.0e+0(3)>
  D.1267_44 = __builtin_pow (cn_43, 2.0e+0);
into a constant.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dberlin at gcc dot gnu dot
                   |                            |org, rguenth at gcc dot gnu
                   |                            |dot org
   Target Milestone|4.4.0                       |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37449