hg: jdk10/hs: 8187601: Unrolling more when SLP auto-vectorization failed

[vladimir.kozlov at oracle.com]

Changeset: d78db2ebce5e
Author:    zyao
Date:      2017-09-20 18:30 +0800
URL:       http://hg.openjdk.java.net/jdk10/hs/rev/d78db2ebce5e

8187601: Unrolling more when SLP auto-vectorization failed
Reviewed-by: kvn

! src/hotspot/share/opto/loopTransform.cpp
! src/hotspot/share/opto/superword.cpp