RFR: 8202640: Small C1 cleanups for BarrierSetC1

[Erik Osterlund]

Hi Vladimir,

Thank you for reviewing.
This change does not change anything for any other platforms. So I do not think RH and SAP needs to try this change.

Thanks,
/Erik

> On 4 May 2018, at 19:18, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> Hi Erik,
> 
> changes look reasonable. Should you change other platforms too since you changed API? At least asks RH and SAP test these changes.
> 
> Thanks,
> Vladimir
> 
>> On 5/4/18 2:33 AM, Erik Österlund wrote:
>> Hi,
>> After rebasing ZGC to BarrierSetC1, we noticed a few small cleanups that would be great.
>> * restore_live_registers_except_rax should be exposed so that barrier set backends may use it
>> * save_live_registers_no_oop_map has an unused argument that should be removed
>> * LIR_OpVisitState::visit should allow visiting LIR with a virtual call (for GC barrier LIR_Ops).
>> * LIR_List::append ought to be public so that barrier set backends can add barrier LIR_Ops.
>> Bug:
>> https://bugs.openjdk.java.net/browse/JDK-8202640
>> Webrev:
>> http://cr.openjdk.java.net/~eosterlund/8202640/webrev.00/
>> Thanks,
>> /Erik