git: openjdk/jdk21u-dev: master: 8316594: C2 SuperWord: wrong result with hand unrolled loops

[Goetz Lindenmaier]

Changeset: db1fa92d
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2024-01-08 09:13:52 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/db1fa92d7420dc94f82af0c781a04a6e0ca511eb

8316594: C2 SuperWord: wrong result with hand unrolled loops

Reviewed-by: roland, shade
Backport-of: 3630af26e6f05237195e53b98603adf404e90a1a

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