[Bug rtl-optimization/83565] RTL combine pass breaks shift result (at least on ia64)

[jason.duerstock at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83565

--- Comment #12 from Jason Duerstock <jason.duerstock at gmail dot com> ---
Some additional information:

1) The code works properly under 6.4.0.
2) The code works properly with -O1 -fno-tree-ter.