The following patch fixes a bad code generation for avx512f-kandnw-1.c
reported in

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64342

  The patch was bootstrapped and tested on x86-64.

  Committed as rev. 221223.

2015-03-05  Vladimir Makarov  <vmakarov@redhat.com>

        PR target/64342
        * lra-assigns.c (find_hard_regno_for): Rename to
        find_hard_regno_for_1.  Add a new parameter.
        (find_hard_regno_for): New function using find_hard_regno_for_1.