On Tue, Nov 15, 2016 at 09:06:23AM -0500, David Edelsohn wrote:
> > * config/rs6000/rs6000.c (rs6000_emit_stack_reset): Emit the
> > stack_restore_tie insn instead of stack_tie, for the SVR4 and
> > SPE ABIs.
> > * config/rs6000/rs6000.md (stack_restore_tie): New def
On Tue, Nov 15, 2016 at 6:48 AM, Segher Boessenkool
wrote:
> If we use ABI_V4 and we have a big stack frame, we end the epilogue
> with a "mr 1,11" (or similar) instruction. This instruction however
> has no dependencies on the earlier restores from stack (done via r11),
> so sched2 can end up re
If we use ABI_V4 and we have a big stack frame, we end the epilogue
with a "mr 1,11" (or similar) instruction. This instruction however
has no dependencies on the earlier restores from stack (done via r11),
so sched2 can end up reordering the insns, which is bad because we
have no red zone so that
