hg: jdk/sandbox: 8235762: JVM crash in SWPointer during C2 compilation

[chris.hegarty at oracle.com]

Changeset: 5aa85653a589
Author:    fyang
Date:      2020-01-09 19:12 +0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/5aa85653a589

8235762: JVM crash in SWPointer during C2 compilation
Reviewed-by: thartmann, chagedorn, neliasso

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