git: openjdk/jdk20u: master: 8299179: ArrayFill with store on backedge needs to reduce length by 1

[Tobias Hartmann]

Changeset: 760ff6e5
Author:    Tobias Hartmann <thartmann at openjdk.org>
Date:      2023-04-04 12:46:11 +0000
URL:       https://git.openjdk.org/jdk20u/commit/760ff6e5b99e84d9d195dcfbcaae8ec97f3f7ac4

8299179: ArrayFill with store on backedge needs to reduce length by 1

Backport-of: d716ec5d3034240b7dd0aed86d9bb371bc3e5f5a

! src/hotspot/share/opto/loopTransform.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestBackedgeLoadArrayFill.jasm
+ test/hotspot/jtreg/compiler/loopopts/TestBackedgeLoadArrayFillMain.java