Mode : -Xmixed
Platform : solsparc 5.6
jdk : /net/sqesvr.eng/export/vsn/VM/merlin/weekahead/jdk/latest/{OS}

Steps to reproduce
1) cd /net/sqesvr.eng/export/vsn/GammaBase/Bugs/{Buid}
2) ./rerun.sh

{OR}

make a `runList.dat` file with the following testcases and run next command-line

$TESTBASE/testbase/testbase_js/classes/engr/Tests/TsdCase TsdCase
$TESTBASE/testbase/testbase_js/classes/engr/PepTest PepTest

/net/sqesvr.eng/export/vsn/VM/merlin/weekahead/jdk/latest/solsparc/bin/java -hotspot -Xmixed -Xss4m -XX:CompileThreshold=3 -XX:+OnStackReplaceALot -XX:+SafepointALot -XX:+FullGCALot -XX:FullGCALotInterval=1000 -XX:-ShowMessageBoxOnError -XX:+ExitOnFullCodeCache -classpath /net/sqesvr.eng/export/vsn/VM/testbase/runThese/classes $* runThese -thread 2 -repeat 1 -iter 1 -D:gc=5 -D:TESTBASE=/net/sqesvr.eng/export/vsn/VM/testbase/runThese/tests -runList runList.dat


Output:
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b61)
Java HotSpot(TM) Client VM (build 20010425110018.jcoomes.baseline-debug, mixed mode)

# HotSpot Virtual Machine Error, assertion failure
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# assert(reg.is_illegal(), "we do not cache two-wrd types..yet")
#
# Error ID: /net/jano.eng/export/disk05/hotspot/imgr/ws/20010425110018.jcoomes.baseline/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp, 202 [ Patched ]
#
# Problematic Thread: prio=5 tid=0x11fcc8 nid=0xb runnable
#
Dumping core....
Abort - core dumped

NOTE: Test passes with -Xint and -Xcomp modes.