C2: "assert(no_dead_loop) failed: dead loop detected" due to cmoving identity

The attached Java Fuzzer test crashes with the following assertion which seems to be unrelated to JDK-8268019:

To reproduce:
$ java -Xcomp -XX:-TieredCompilation -XX:CompileOnly=Test Test.java
$ java-Xcomp -XX:-TieredCompilation -XX:CompileOnly=Reduced Reduced.java

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/opt/mach5/mesos/work_dir/slaves/3c846bae-ce30-4a97-93ee-9fef4497ccb6-S124123/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/57294efe-464f-4c0a-b55a-fd67bfa32e7b/runs/71c23d41-87fd-4de4-92b5-4ba130c3e1dd/workspace/open/src/hotspot/share/opto/phaseX.cpp:945), pid=295183, tid=295196
# assert(no_dead_loop) failed: dead loop detected
#
# JRE version: Java(TM) SE Runtime Environment (18.0+7) (fastdebug build 18-ea+7-268)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-ea+7-268, compiled mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x15c93f6] PhaseGVN::dead_loop_check(Node*) [clone .part.0]+0x156
............
Command Line: -Xcomp -XX:-TieredCompilation -XX:CompileOnly=Test --add-modules=ALL-DEFAULT jdk.compiler/com.sun.tools.javac.launcher.Main Test.java
............
Current thread (0x00007ffa981da920): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=295196, stack(0x00007ffa74a64000,0x00007ffa74b65000)]


Current CompileTask:
C2: 3295 88 b Test::lMeth (390 bytes)

Stack: [0x00007ffa74a64000,0x00007ffa74b65000], sp=0x00007ffa74b603e0, free space=1008k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x15c93f6] PhaseGVN::dead_loop_check(Node*) [clone .part.0]+0x156
V [libjvm.so+0x15d67f9] PhaseIterGVN::transform_old(Node*)+0x4f9
V [libjvm.so+0x15cfcbe] PhaseIterGVN::optimize()+0x7e
V [libjvm.so+0x9f7269] Compile::Optimize()+0x1b9
V [libjvm.so+0x9f9ff4] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, bool, DirectiveSet*)+0x1564
V [libjvm.so+0x81a076] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x646
V [libjvm.so+0xa0aab9] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xef9
V [libjvm.so+0xa0b7e8] CompileBroker::compiler_thread_loop()+0x598
V [libjvm.so+0x186829c] JavaThread::thread_main_inner()+0x27c
V [libjvm.so+0x186eb90] Thread::call_run()+0x100
V [libjvm.so+0x1551464] thread_native_entry(Thread*)+0x104