[Bug tree-optimization/58223] [4.8/4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58223

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-08-23
            Summary|wrong code at -O3 on        |[4.8/4.9 Regression] wrong
                   |x86_64-linux-gnu            |code at -O3 on
                   |                            |x86_64-linux-gnu
     Ever confirmed|0                           |1

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
ldist pass replaces the a[b]=0 statements with a call to memset after the loop,
apparently missing the aliasing with a[0]=1.