hg: jdk/sandbox: 8249608: Vector register used by C2 compiled method corrupted at safepoint

[chris.hegarty at oracle.com]

Changeset: 9805023507c0
Author:    thartmann
Date:      2020-08-10 08:21 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/9805023507c0

8249608: Vector register used by C2 compiled method corrupted at safepoint
Summary: Always update 'max_vlen_in_bytes'.
Reviewed-by: kvn, vlivanov, chagedorn

! src/hotspot/share/opto/superword.cpp
+ test/hotspot/jtreg/compiler/vectorization/TestVectorsNotSavedAtSafepoint.java