[Bug tree-optimization/60766] [4.8/4.9 Regression] Wrong optimization with -O2

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60766

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Target|                            |x86_64-*-*-*
      Known to work|                            |4.4.5
   Target Milestone|---                         |4.8.3
            Summary|Wrong optimization with -O2 |[4.8/4.9 Regression] Wrong
                   |                            |optimization with -O2
      Known to fail|                            |4.9.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like IV-opt is creating some overflows that were not there in the
original code.

Fails with:
g++ (GCC) 4.9.0 20131026 (experimental) [trunk revision 204095]


I have not updated my compiler since then.