RFR: 8331733: [PPC64] saving and restoring CR is not needed at most places

[Varada M]

On Tue, 4 Jun 2024 15:02:43 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> PPC64 uses save/restore CR less often. Only LR is critical, CR is mainly needed for native-to-Java calls.
>> Fastdebug: build and tier1 testing successful. [unrelated failures]
>
> Please make xBarrierSetAssembler_ppc.cpp consistent with the normal BarrierSetAssembler. "// NOP. Conditions registers are covered by save_LR_CR" should get replaced, too.
> Saving and restoring CR in `RegisterSaver::push_frame_reg_args_and_save_live_registers` and `RegisterSaver::restore_live_registers_and_pop_frame` are not needed, either.
> Otherwise, this PR looks good to me. I'll run tests. (Will retest when you make updates.)

Thank you @TheRealMDoerr . I have made the changes.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/19494#issuecomment-2149030309