hg: jdk8u/jdk8u-dev/hotspot: 8158012: Use SW prefetch instructions instead of BIS for allocation prefetches on SPARC Core C4

[kevin.walls at oracle.com]

Changeset: cb0b95b67cb2
Author:    mchinnathamb
Date:      2018-04-23 02:05 -0700
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/cb0b95b67cb2

8158012: Use SW prefetch instructions instead of BIS for allocation prefetches on SPARC Core C4
Reviewed-by: kvn, dholmes, poonam

! src/cpu/sparc/vm/vm_version_sparc.cpp
! src/share/vm/opto/macro.cpp