Java crash in C2 CompilerThread in IfNode::fold_compares

Issue

• JVM crash with the following in the fatal error log:

Current thread (0x00005615845fe800):  JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=1001989, stack(0x00007f722baf0000,0x00007f722bbf1000)]
...
Stack: [0x00007f722baf0000,0x00007f722bbf1000],  sp=0x00007f722bbec7f0,  free space=1009k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0xe3d524]  SubINode::Ideal(PhaseGVN*, bool)+0x24
V  [libjvm.so+0xc45649]  PhaseIterGVN::transform_old(Node*)+0xb9
V  [libjvm.so+0x8568e6]  IfNode::fold_compares_helper(ProjNode*, ProjNode*, ProjNode*, PhaseIterGVN*)+0xaf6
V  [libjvm.so+0x8576a2]  IfNode::fold_compares(PhaseIterGVN*)+0x4d2
V  [libjvm.so+0x8593e6]  IfNode::Ideal(PhaseGVN*, bool)+0x236
V  [libjvm.so+0xc4562b]  PhaseIterGVN::transform_old(Node*)+0x9b
V  [libjvm.so+0xc41ff8]  PhaseIterGVN::optimize()+0xf8
V  [libjvm.so+0x63e5e8]  Compile::Optimize()+0x168
V  [libjvm.so+0x63fff3]  Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xc93
V  [libjvm.so+0x563c84]  C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0xd4
V  [libjvm.so+0x649883]  CompileBroker::invoke_compiler_on_method(CompileTask*)+0x563
V  [libjvm.so+0x64ad08]  CompileBroker::compiler_thread_loop()+0x468
V  [libjvm.so+0xea0951]  JavaThread::thread_main_inner()+0x201
V  [libjvm.so+0xe9c75c]  Thread::call_run()+0x15c
V  [libjvm.so+0xbeeac6]  thread_native_entry(Thread*)+0xf6