[Bug rtl-optimization/59754] [ree.c] Incorrect merge while working with vector registers

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59754

--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
Kirill, can you verify that Jakub's patch restores proper behaviour for your
tests?  It'd be greatly appreciated.