hg: jdk/sandbox: 8222271: [s390] optimize register usage in C2 instruction forms for clearing arrays

[chris.hegarty at oracle.com]

Changeset: 0a4214c90a55
Author:    rrich
Date:      2019-04-16 08:51 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/0a4214c90a55

8222271: [s390] optimize register usage in C2 instruction forms for clearing arrays
Reviewed-by: mdoerr, lucy

! src/hotspot/cpu/s390/macroAssembler_s390.cpp
! src/hotspot/cpu/s390/macroAssembler_s390.hpp
! src/hotspot/cpu/s390/s390.ad