hg: jdk/jdk: 8238438: SuperWord::co_locate_pack picks memory state of first instead of last load

[christian.hagedorn at oracle.com]

Changeset: 1d64bd5b34e0
Author:    chagedorn
Date:      2020-03-02 10:23 +0100
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/1d64bd5b34e0

8238438: SuperWord::co_locate_pack picks memory state of first instead of last load
Summary: Fix selection of first and last memory state in SuperWord::co_locate_pack
Reviewed-by: thartmann, kvn

! src/hotspot/share/opto/superword.cpp
! src/hotspot/share/opto/superword.hpp
+ test/hotspot/jtreg/compiler/loopopts/superword/CoLocatePackMemoryState.java