java (fastdebug 9-ea+109) with "-Xcomp -XX:AllocatePrefetchStyle=2" options on Sparcv9 hit assert:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/HUDSON/workspace/9-2-build-solaris-sparcv9-phase2/jdk9/4620/hotspot/src/share/vm/classfile/javaClasses.cpp:1069), pid=12292, tid=2
# assert(java_class == Universe::void_mirror()) failed: only valid non-array primitive
#
# JRE version: Java(TM) SE Runtime Environment (9.0+109) (fastdebug build 9-ea+109-2016-03-10-032101.javare.4620)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-ea+109-2016-03-10-032101.javare.4620, compiled mode, tiered, compressed oops, g1 gc, solaris-sparc)
# Core dump will be written. Default location: /tmp/dd/jdk-9/fastdebug/bin/core or core.12292
#
...

AllocatePrefetchStyle is a product option with valid range [0...3]. According to globals.hpp value 2 means "use TLAB watermark to gate allocation prefetch"

hs_err_pid12292.log is attached.