[s390] RFR(XS): 8184267: Restore register from stack uses wrong offset

[Lindenmaier, Goetz]

Hi Lutz, 

took me a while to see the bug, good catch :)
Looks good.

Goetz.

> -----Original Message-----
> From: hotspot-runtime-dev [mailto:hotspot-runtime-dev-
> bounces at openjdk.java.net] On Behalf Of Schmidt, Lutz
> Sent: Mittwoch, 12. Juli 2017 14:30
> To: hotspot-runtime-dev at openjdk.java.net
> Subject: [s390] RFR(XS): 8184267: Restore register from stack uses wrong
> offset
> 
> Dear community,
> 
> may I please request reviews for this little s390-only bug fix? It corrects the
> offset used to restore a previously saved argument register value. At the
> same time, the save/restore code is improved by the use of “store multiple”
> and “load multiple” instructions.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8184267
> Webrev: http://cr.openjdk.java.net/~lucy/webrevs/8184267.00/
> 
> Thank you very much!
> Lutz