ADDITIONAL SYSTEM INFORMATION :
# JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug--b00)
# Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug compiled mode linux-amd64 compressed oops)

A DESCRIPTION OF THE PROBLEM :
I ran a modified regression test case on JDK8u392 and found that the JVM crashed with -Xcomp -XX:-TieredCompilation options.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/data//jdk8u/hotspot/src/share/vm/opto/postaloc.cpp:139), pid=53335, tid=0x00007fb168737700
# assert(false) failed: unexpected yanked node
#
# JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug--b00)
# Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug compiled mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
java -Xcomp -XX:-TieredCompilation compiler.c2.TestRemoveMemBarPrecEdge

ACTUAL -
==============================================
orig_old:
 131 loadN === _ 79 132 [[]] narrowoop: java/lang/String:exact * !jvms: Thread::getName @ bci:1 TestRemoveMemBarPrecEdge::test @ bci:11 TestRemoveMemBarPrecEdge::main @ bci:27
old:
 131 loadN === _ 79 132 [[]] narrowoop: java/lang/String:exact * !jvms: Thread::getName @ bci:1 TestRemoveMemBarPrecEdge::test @ bci:11 TestRemoveMemBarPrecEdge::main @ bci:27
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/postaloc.cpp:139
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/data//jdk8u/hotspot/src/share/vm/opto/postaloc.cpp:139), pid=53335, tid=0x00007fb168737700
# assert(false) failed: unexpected yanked node
#
# JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug--b00)
# Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug compiled mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home//repository//toreport/TestRemoveMemBarPrecEdge_09_25_12_25_32/hs_err_pid53335.log
#
# Compiler replay data is saved as:
# /home//repository//toreport/TestRemoveMemBarPrecEdge_09_25_12_25_32/replay_pid53335.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

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