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  1. JDK
  2. JDK-8279837

C2: assert(is_Loop()) failed: invalid node class: Region

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    • Subcomponent:
    • Resolved In Build:
      b32
    • Verification:
      Verified

      Backports

        Description

        The attached test was extracted from a newly added JCK test for 18.

        To reproduce:

        $ java -Xcomp -XX:-TieredCompilation -XX:CompileCommand=compileonly,Test::run -XX:CompileCommand=dontinline,Test::dontInline Test.java

        #
        # A fatal error has been detected by the Java Runtime Environment:
        #
        # Internal Error (/opt/mach5/mesos/work_dir/slaves/ff806ead-2cac-495d-9cbc-62116f99bf14-S13700/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/8f731315-8676-4d9a-b759-a859429b8bf4/runs/73843d3e-ae06-4fbd-97ab-7296fb2593fc/workspace/open/src/hotspot/share/opto/node.hpp:894), pid=20387, tid=20400
        # assert(is_Loop()) failed: invalid node class: Region
        #
        # JRE version: Java(TM) SE Runtime Environment (18.0+26) (fastdebug build 18-ea+26-1787)
        # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-ea+26-1787, compiled mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
        # Problematic frame:
        # V [libjvm.so+0x1352e34] IdealLoopTree::compute_trip_count(PhaseIdealLoop*)+0x34
        .......
        Command Line: -Xcomp -XX:-TieredCompilation -XX:CompileCommand=compileonly,Test::run -XX:CompileCommand=dontinline,Test::dontInline --add-modules=ALL-DEFAULT jdk.compiler/com.sun.tools.javac.launcher.Main Test.java
        .......
        Current CompileTask:
        C2: 2416 81 b Test::run (29 bytes)

        Stack: [0x00007fd3cc7d7000,0x00007fd3cc8d8000], sp=0x00007fd3cc8d1fb0, free space=1003k
        Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [libjvm.so+0x1352e34] IdealLoopTree::compute_trip_count(PhaseIdealLoop*)+0x34
        V [libjvm.so+0x1366dec] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x11c
        V [libjvm.so+0x13944c8] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0xe68
        V [libjvm.so+0xa9485a] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x28a
        V [libjvm.so+0xa9024a] Compile::Optimize()+0x73a
        V [libjvm.so+0xa92d9e] Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0x159e
        V [libjvm.so+0x8ab5a4] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x664
        V [libjvm.so+0xaa3098] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xc88
        V [libjvm.so+0xaa3e58] CompileBroker::compiler_thread_loop()+0x648
        V [libjvm.so+0x192745a] JavaThread::thread_main_inner()+0x25a
        V [libjvm.so+0x192f820] Thread::call_run()+0x100
        V [libjvm.so+0x1611f24] thread_native_entry(Thread*)+0x104

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          1. Test.java
            0.4 kB
            Christian Hagedorn

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                Assignee:
                chagedorn Christian Hagedorn
                Reporter:
                chagedorn Christian Hagedorn
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                  Created:
                  Updated:
                  Resolved: