The assertion
# assert(mode == ControlAroundStripMined && use == sfpt) failed: missed a node
was hit again in JDK14+10 by JavaFauzzer test.



# Internal Error (open/src/hotspot/share/opto/loopopts.cpp:1696), pid=19337, tid=19348
# assert(mode == ControlAroundStripMined && use == sfpt) failed: missed a node
#
# JRE version: Java(TM) SE Runtime Environment (14.0+10) (fastdebug build 14-ea+10-332)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 14-ea+10-332, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x11eb9dd] PhaseIdealLoop::clone_loop_handle_data_uses(Node*, Node_List&, IdealLoopTree*, IdealLoopTree*, Node_List*&, Node_List*&, Node_List*&, Node_List&, unsigned int, PhaseIdealLoop::CloneLoopMode)+0x62d
#
...............
--------------- T H R E A D ---------------

Current thread (0x00007f21fc257800): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=19348, stack(0x00007f21e0aa7000,0x00007f21e0ba8000)]


Current CompileTask:
C2: 251 49 % ! 4 Test::iMeth @ 72 (266 bytes)

Stack: [0x00007f21e0aa7000,0x00007f21e0ba8000], sp=0x00007f21e0ba1c40, free space=1003k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x11eb9dd] PhaseIdealLoop::clone_loop_handle_data_uses(Node*, Node_List&, IdealLoopTree*, IdealLoopTree*, Node_List*&, Node_List*&, Node_List*&, Node_List&, unsigned int, PhaseIdealLoop::CloneLoopMode)+0x62d
V [libjvm.so+0x11edd54] PhaseIdealLoop::clone_loop(IdealLoopTree*, Node_List&, int, PhaseIdealLoop::CloneLoopMode, Node*)+0xd64
V [libjvm.so+0x11b25cc] PhaseIdealLoop::insert_post_loop(IdealLoopTree*, Node_List&, CountedLoopNode*, CountedLoopEndNode*, Node*, Node*, CountedLoopNode*&)+0xdc
V [libjvm.so+0x11b3674] PhaseIdealLoop::insert_pre_post_loops(IdealLoopTree*, Node_List&, bool)+0x2d4
V [libjvm.so+0x11bbc5b] IdealLoopTree::iteration_split_impl(PhaseIdealLoop*, Node_List&)+0x42b
V [libjvm.so+0x11bd111] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x111
V [libjvm.so+0x11bd026] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x26
V [libjvm.so+0x11bd026] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x26
V [libjvm.so+0x11e0bb7] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0xd27
V [libjvm.so+0x9c6b2a] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x2ea
V [libjvm.so+0x9c3c64] Compile::Optimize()+0xbc4
V [libjvm.so+0x9c527f] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0x109f
V [libjvm.so+0x807cad] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0x10d
V [libjvm.so+0x9d1962] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x2d2
V [libjvm.so+0x9d2858] CompileBroker::compiler_thread_loop()+0x3b8
V [libjvm.so+0x16cac36] JavaThread::thread_main_inner()+0x226
V [libjvm.so+0x16d0276] Thread::call_run()+0xf6
V [libjvm.so+0x13ecede] thread_native_entry(Thread*)+0x10e