git: openjdk/jdk21: 8310130: C2: assert(false) failed: scalar_input is neither phi nor a matchin reduction

[Tobias Hartmann]

Changeset: 687863d9
Author:    Tobias Hartmann <thartmann at openjdk.org>
Date:      2023-06-28 18:26:40 +0000
URL:       https://git.openjdk.org/jdk21/commit/687863d9003c58d45841906a9fd5674eeeb132a1

8310130: C2: assert(false) failed: scalar_input is neither phi nor a matchin reduction

Reviewed-by: kvn
Backport-of: 526dba1a2942e444bf11d03d8eaf014b5ef20ccf

! src/hotspot/share/opto/loopopts.cpp
! test/hotspot/jtreg/compiler/loopopts/superword/TestUnorderedReduction.java
+ test/hotspot/jtreg/compiler/loopopts/superword/TestUnorderedReductionPartialVectorization.java