Bug ID: JDK-8221605 C2 crashed at PhaseIdealLoop::build_loop_late

Versions (Unresolved/Resolved/Fixed)

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openjdk8uResolved

I'm creating this bug on behalf of the Alibaba Dragonwell community (a friendly downstream distribution of JDK8) with consent from GitHub user 'yansendao'. 

Dragonwell Issue link: 
https://github.com/alibaba/dragonwell8/issues/13

Description: 
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f994b450d20, pid=71210, tid=0x00007f97bd496700
#
# JRE version: OpenJDK Runtime Environment (8.0_202-b32) (build 1.8.0_202-b32)
# Java VM: OpenJDK 64-Bit Server VM (25.202-b32 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V  [libjvm.so+0x83cd20]  PhaseIdealLoop::build_loop_late_post(Node*)+0x130
#
# 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:
# /ssd1/home/chuansheng.lcs/tmp/tf1/hs_err_pid71210.log
#
# Compiler replay data is saved as:
# /ssd1/home/chuansheng.lcs/tmp/tf1/replay_pid71210.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
#
Aborted


Steps to reproduce: 
- unzip attachment testfile1.zip 
- javac testfile/* 
- java -cp testfile PhaseIdealLoopBuildLoopLatePost 


JDK version: 
I tested and confirmed that this bug happened on jdk8 only