On Fri, Sep 23, 2016 at 4:21 AM, Segher Boessenkool <seg...@kernel.crashing.org> wrote: > This implements the hooks for separate shrink-wrapping for rs6000. > It handles GPRs and LR. The GPRs get a component number corresponding > to their register number; LR gets component number 0. > > > 2016-09-23 Segher Boessenkool <seg...@kernel.crashing.org> > > * config/rs6000/rs6000.c (machine_function): Add new fields > gpr_is_wrapped_separately and lr_is_wrapped_separately. > (TARGET_SHRINK_WRAP_GET_SEPARATE_COMPONENTS, > TARGET_SHRINK_WRAP_COMPONENTS_FOR_BB, > TARGET_SHRINK_WRAP_DISQUALIFY_COMPONENTS, > TARGET_SHRINK_WRAP_EMIT_PROLOGUE_COMPONENTS, > TARGET_SHRINK_WRAP_EMIT_EPILOGUE_COMPONENTS, > TARGET_SHRINK_WRAP_SET_HANDLED_COMPONENTS): Define. > (rs6000_get_separate_components): New function. > (rs6000_components_for_bb): New function. > (rs6000_disqualify_components): New function. > (rs6000_emit_prologue_components): New function. > (rs6000_emit_epilogue_components): New function. > (rs6000_set_handled_components): New function. > (rs6000_emit_prologue): Don't emit LR save if > lr_is_wrapped_separately. > Don't emit GPR saves if gpr_is_wrapped_separately for that register. > (rs6000_emit_epilogue): Don't emit GPR restores if > gpr_is_wrapped_separately for that register. Don't make a > REG_CFA_RESTORE note for registers we did not restore, either.
The rs6000 bits are okay when the rest of the shrink-wrapping infrastructure is approved. Thanks, David
