Re: [PATCH 4/9] regrename: Don't rename restores

[Jeff Law]

On 07/31/2016 07:42 PM, Segher Boessenkool wrote:
A restore is supposed to restore some certain register.  Restoring it
into some other register will not work.  Don't.
2016-06-07  Segher Boessenkool  <seg...@kernel.crashing.org>

        * regrename.c (build_def_use): Invalidate chains that have a
        REG_CFA_RESTORE on some instruction.
Again, how is this different from a normal epilogue that restores 
registers which regrename seems to not muck with.

Jeff