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  1. JDK
  2. JDK-8316864

assert(UseLoopPredicate && bol->Opcode() == Op_Conv2B) failed: predicate check only

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    • x86_64
    • linux_ubuntu

      ADDITIONAL SYSTEM INFORMATION :
      # JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug_2023_09_20_15_15-b00)
      # Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug mixed mode linux-amd64 compressed oops)
      # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
      #

      A DESCRIPTION OF THE PROBLEM :
      I ran a testcase using JDK8u321, I found the JVM crashed under the option -XX:-UseLoopPredicate

      # A fatal error has been detected by the Java Runtime Environment:
      #
      # Internal Error (/data/jdk8u/hotspot/src/share/vm/opto/loopTransform.cpp:789), pid=11850, tid=0x00007fa5de858700
      # assert(UseLoopPredicate && bol->Opcode() == Op_Conv2B) failed: predicate check only
      #
      # JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug_2023_09_20_15_15-b00)
      # Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug mixed mode linux-amd64 compressed oops)
      # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
      #
      # If you would like to submit a bug report, please visit:
      # http://bugreport.java.com/bugreport/crash.jsp

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      java -XX:-UseLoopPredicate Test

      ACTUAL -
      # To suppress the following error report, specify this argument
      # after -XX: or in .hotspotrc: SuppressErrorAt=/loopTransform.cpp:789
      #
      # A fatal error has been detected by the Java Runtime Environment:
      #
      # Internal Error (/data/jdk8u/hotspot/src/share/vm/opto/loopTransform.cpp:789), pid=47606, tid=0x00007f22ab666700
      # assert(UseLoopPredicate && bol->Opcode() == Op_Conv2B) failed: predicate check only
      #
      # JRE version: OpenJDK Runtime Environment (8.0_392) (build 1.8.0_392-internal-fastdebug-2023_09_20_15_15-b00)
      # Java VM: OpenJDK 64-Bit Server VM (25.392-b00-fastdebug mixed mode linux-amd64 compressed oops)
      # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
      #
      # An error report file with more information is saved as:
      # /home/repository/bugs/Test_09_21_10_09_48/hs_err_pid47606.log
      #
      # Compiler replay data is saved as:
      # /home/repository/bugs/Test_09_21_10_09_48/replay_pid47606.log
      #
      # If you would like to submit a bug report, please visit:
      # http://bugreport.java.com/bugreport/crash.jsp
      #
      Current thread is 139786881230592
      Dumping core ...

      ---------- BEGIN SOURCE ----------

      ---------- END SOURCE ----------

      FREQUENCY : always


        1. hs_err_pid47606.log
          183 kB
        2. hs_err_pid9192.log
          13 kB
        3. Test.java
          2 kB

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            webbuggrp Webbug Group
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              Created:
              Updated: