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  1. JDK
  2. JDK-8202747

C2: assert(mode == ControlAroundStripMined && use == sfpt) failed: missed a node



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        C2 fails to compile attached example with:
        # A fatal error has been detected by the Java Runtime Environment:
        # Internal Error (/scratch/opt/mach5/mesos/work_dir/slaves/c4ee7e63-1ded-4e8c-9581-ce26f27e3af4-S69/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/586418bb-0ee2-42a6-9fa9-287343fddaec/runs/51c4f697-f1db-464c-9fe5-26245cfc50fe/workspace/open/src/hotspot/share/opto/loopopts.cpp:1617), pid=25103, tid=25114
        # assert(mode == ControlAroundStripMined && use == sfpt) failed: missed a node
        # JRE version: Java(TM) SE Runtime Environment (11.0+12) (fastdebug build 11-ea+12)
        # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 11-ea+12, compiled mode, compressed oops, g1 gc, linux-amd64)
        # Core dump will be written. Default location: Core dumps may be processed with "/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t e %P %I %h" (or dumping to /scratch/lmesnik/ws/crashes/r1-1242/core.25103)
        # If you would like to submit a bug report, please visit:
        # http://bugreport.java.com/bugreport/crash.jsp

        --------------- S U M M A R Y ------------

        Command Line: -Xcomp -Xbatch -XX:CompileOnly=Test -XX:-TieredCompilation Test

        Host: slc16ijb, Intel Core Processor (Haswell, no TSX), 4 cores, 14G, Oracle Linux Server release 7.4
        Time: Mon May 7 16:35:07 2018 PDT elapsed time: 0 seconds (0d 0h 0m 0s)

        --------------- T H R E A D ---------------

        Current thread (0x00007f8b682da800): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=25114, stack(0x00007f8b5817b000,0x00007f8b5827c000)]

        Current CompileTask:
        C2: 478 4 b Test::vMeth (289 bytes)

        Stack: [0x00007f8b5817b000,0x00007f8b5827c000], sp=0x00007f8b58275e20, 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+0x1859d2f] VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x25f
        V [libjvm.so+0x185aaef] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, __va_list_tag*)+0x2f
        V [libjvm.so+0xadfb30] report_vm_error(char const*, int, char const*, char const*, ...)+0x100
        V [libjvm.so+0x127e49c] PhaseIdealLoop::clone_loop_handle_data_uses(Node*, Node_List&, IdealLoopTree*, IdealLoopTree*, Node_List*&, Node_List*&, Node_List*&, Node_List&, unsigned int, PhaseIdealLoop::CloneLoopMode)+0x5bc
        V [libjvm.so+0x127f7c7] PhaseIdealLoop::clone_loop(IdealLoopTree*, Node_List&, int, PhaseIdealLoop::CloneLoopMode, Node*)+0xe27
        V [libjvm.so+0x1242e65] PhaseIdealLoop::do_peeling(IdealLoopTree*, Node_List&)+0xd5
        V [libjvm.so+0x124940e] PhaseIdealLoop::do_maximally_unroll(IdealLoopTree*, Node_List&)+0x7e
        V [libjvm.so+0x124dc91] IdealLoopTree::iteration_split_impl(PhaseIdealLoop*, Node_List&)+0x581
        V [libjvm.so+0x124df4a] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x24a
        V [libjvm.so+0x124de7c] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x17c
        V [libjvm.so+0x124de7c] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x17c
        V [libjvm.so+0x12740c1] PhaseIdealLoop::build_and_optimize(bool, bool)+0xe31
        V [libjvm.so+0xa3d914] Compile::Optimize()+0xb44
        V [libjvm.so+0xa3ec74] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xf94
        V [libjvm.so+0x835781] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0xd1
        V [libjvm.so+0xa4c353] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x413
        V [libjvm.so+0xa4d327] CompileBroker::compiler_thread_loop()+0x317
        V [libjvm.so+0x17a57a7] JavaThread::thread_main_inner()+0x2c7
        V [libjvm.so+0x17a5aff] JavaThread::run()+0x24f
        V [libjvm.so+0x14b9460] thread_native_entry(Thread*)+0x100


          1. FuzzerUtils.java
            13 kB
          2. hs_err_pid15451.log
            60 kB
          3. Test.java
            14 kB

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                roland Roland Westrelin
                lmesnik Leonid Mesnik
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