hg: jdk/jdk: 8229694: JVM crash in SWPointer during C2 OSR compilation

[tobias.hartmann at oracle.com]

Changeset: 586415e8abcb
Author:    chagedorn
Date:      2019-11-11 10:41 +0100
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/586415e8abcb

8229694: JVM crash in SWPointer during C2 OSR compilation
Summary: Handle the case where there is only 1 pack and no operations left when calling SuperWord::find_align_to_ref() to find the best alignment again.
Reviewed-by: kvn, vlivanov, thartmann

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