[Bug tree-optimization/105665] [12/13 Regression] wrong code at -Os and above on x86_64-linux-gnu since r12-397-gda9e6e63d1ae22

[aoliva at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105665

Alexandre Oliva <aoliva at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |aoliva at gcc dot 
gnu.org

--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Mine.  The problem is that the undef name may appear deep in a chain of phis,
instead of appearing directly in the base expr.