hg: jdk/submit12: 8213134: AArch64: vector shift failed with MaxVectorSize=8

[aph at redhat.com]

Changeset: 11f59b9c72fe
Author:    yzhang
Date:      2018-11-28 16:22 +0800
URL:       http://hg.openjdk.java.net/jdk/submit12/rev/11f59b9c72fe

8213134: AArch64: vector shift failed with MaxVectorSize=8
Summary: add vshiftcnt instructions for vector64 and add vsra/vsrl instructions to AArch64 backend. To detect shift failures, MaxVectorSize options are added to jtreg test cases.
Reviewed-by: aph, kvn

! src/hotspot/cpu/aarch64/aarch64.ad
! test/hotspot/jtreg/compiler/c2/cr6340864/TestByteVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestDoubleVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestFloatVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestIntVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestLongVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestShortVect.java
! test/hotspot/jtreg/compiler/codegen/TestCharVect2.java