Regression after 7131302 changes.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/tmp/jprt/P2/224736.iveresov/source/src/share/vm/opto/node.hpp:941), pid=25845, tid=2807212944
# guarantee(t != NULL) failed: must be con
#
# JRE version: 7.0_04-b07
# Java VM: Java HotSpot(TM) Server VM (23.0-b11-internal-201201202247.iveresov.7131028-fastdebug compiled mode linux-x86 )
# Core dump written. Default location: /export/local/57670.JDK7.NIGHTLY.VM_linux-i586_jittester_server_comp_testlist/results/wrk_dir1327134748790/core or core.25845
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x097fcc00): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=25853, stack(0xa74aa000,0xa752b000)]

Stack: [0xa74aa000,0xa752b000], sp=0xa7528240, free space=504k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xaf1761] VMError::report_and_die()+0x1a1;; VMError::report_and_die()+0x1a1
V [libjvm.so+0x4e9598] report_vm_error(char const*, int, char const*, char const*)+0x68;; report_vm_error(char const*, int, char const*, char const*)+0x68
V [libjvm.so+0x86d5cf] LoadUBNode::Value(PhaseTransform*) const+0xcf;; LoadUBNode::Value(PhaseTransform*) const+0xcf
V [libjvm.so+0x97881a] PhaseIterGVN::transform_old(Node*)+0x28a;; PhaseIterGVN::transform_old(Node*)+0x28a
V [libjvm.so+0x974bb1] PhaseIterGVN::optimize()+0x261;; PhaseIterGVN::optimize()+0x261
V [libjvm.so+0x47714b] Compile::Optimize()+0xbfb;; Compile::Optimize()+0xbfb
V [libjvm.so+0x47b11c] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool)+0x14bc;; Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool)+0x14bc
V [libjvm.so+0x38e149] C2Compiler::compile_method(ciEnv*, ciMethod*, int)+0x229;; C2Compiler::compile_method(ciEnv*, ciMethod*, int)+0x229
V [libjvm.so+0x484e3e] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x55e;; CompileBroker::invoke_compiler_on_method(CompileTask*)+0x55e
V [libjvm.so+0x485d1b] CompileBroker::compiler_thread_loop()+0x5bb;; CompileBroker::compiler_thread_loop()+0x5bb
V [libjvm.so+0xa8a69f] compiler_thread_entry(JavaThread*, Thread*)+0x4f;; _ZL21compiler_thread_entryP10JavaThreadP6Thread+0x4f
V [libjvm.so+0xa962a9] JavaThread::thread_main_inner()+0x1b9;; JavaThread::thread_main_inner()+0x1b9
V [libjvm.so+0x91c3c1] java_start(Thread*)+0x111;; _ZL10java_startP6Thread+0x111
C [libpthread.so.0+0x5832] abort@@GLIBC_2.0+0x5832


Current CompileTask:
C2: 652349 30618 b Test_Class_3::<init> (613 bytes)

jvm_args: -Xcomp -XX:-PrintVMOptions -XX:-TieredCompilation -XX:CompileThreshold=100 -XX:DefaultMaxRAMFraction=8 -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+AggressiveOpts -XX:-DontCompileHugeMethods -Xmx128M