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)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#

A DESCRIPTION OF THE PROBLEM :
I ran a regression test using JDK8u392, I found it crashed without any option

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/data/xzf/jdk8u/hotspot/src/share/vm/opto/type.hpp:1492), pid=2385, tid=0x00007f5904e3e700
# assert(_base == Int) failed: Not an Int
#
# 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 compiler.loopopts.TestSplitIfUnswitchedLoopsEliminated

ACTUAL -
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/ifnode.cpp:233
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/data/xzf/jdk8u/hotspot/src/share/vm/opto/ifnode.cpp:233), pid=28958, tid=0x00007f274a757700
# assert(predicate_proj == NULL) failed: only one predicate entry expected
#
# 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 mixed 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/TestSplitIfUnswitchedLoopsEliminated_09_24_15_55_35/hs_err_pid28958.log
#
# Compiler replay data is saved as:
# /home/repository/toreport/TestSplitIfUnswitchedLoopsEliminated_09_24_15_55_35/replay_pid28958.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#
Current thread is 139806729664256

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The source code of testcase and the hs_err file can be found at the URL:
 https://drive.google.com/file/d/12D8ZXMVb_ZPOuTWeqKPqvybqzJNUVOXF/view?usp=sharing
---------- END SOURCE ----------

FREQUENCY : always