hg: jdk9/hs-comp/hotspot: 8136615: aarch64: elide DecodeN when followed by CmpP 0

[edward.nevill at gmail.com]

Changeset: db3a3feccd9b
Author:    enevill
Date:      2015-09-16 13:50 +0000
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/db3a3feccd9b

8136615: aarch64: elide DecodeN when followed by CmpP 0
Summary: remove DecodeN when comparing a narrow oop with 0
Reviewed-by: kvn, adinn

! src/cpu/aarch64/vm/aarch64.ad