On Thu, Sep 08, 2016 at 11:51:53AM -0600, Jeff Law wrote: > 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.
Good question. Either way, it is always wrong to rename a register we restore from stack. Segher
