[lworld] C2 compilation fails with ShouldNotReachHere in verify_strip_mined_scheduling

# Internal Error (/oracle/valhalla1/open/src/hotspot/share/opto/loopnode.cpp:4237), pid=12777, tid=12791
# Error: ShouldNotReachHere()
#
# JRE version: Java(TM) SE Runtime Environment (14.0) (fastdebug build 14-internal+0-adhoc.tobias.open)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 14-internal+0-adhoc.tobias.open, mixed mode, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x124f5f4] PhaseIdealLoop::verify_strip_mined_scheduling(Node*, Node*)+0x3a4


Current CompileTask:
C2: 698 163 Test::vMeth (537 bytes)

Stack: [0x00007fbef0c03000,0x00007fbef0d04000], sp=0x00007fbef0cfe290, free space=1004k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x124f5f4] PhaseIdealLoop::verify_strip_mined_scheduling(Node*, Node*)+0x3a4
V [libjvm.so+0x12529d2] PhaseIdealLoop::build_loop_late_post_work(Node*, bool)+0x362
V [libjvm.so+0x1252f60] PhaseIdealLoop::build_loop_late(VectorSet&, Node_List&, Node_Stack&)+0xf0
V [libjvm.so+0x1256c81] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0x761
V [libjvm.so+0x9dcd09] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x2f9
V [libjvm.so+0x9d9d5f] Compile::Optimize()+0xccf
V [libjvm.so+0x9db0e9] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xfe9
V [libjvm.so+0x7fcadd] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0x10d
V [libjvm.so+0x9e7674] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x334
V [libjvm.so+0x9e86c8] CompileBroker::compiler_thread_loop()+0x4f8
V [libjvm.so+0x17a08d6] JavaThread::thread_main_inner()+0x1b6
V [libjvm.so+0x17a60c6] Thread::call_run()+0xf6
V [libjvm.so+0x148980e] thread_native_entry(Thread*)+0x10e