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  1. JDK
  2. JDK-8263577

C2: reachable nodes shouldn't have dead uses at the end of optimizations

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    • b14

    Description

      It's not uncommon for c2 to leave dead uses hanging from reachable nodes. It's usually harmless but can cause confusion (such as in
      valhalla JDK-8262289, not reproducible with non valhalla code AFAICT).

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. JDK-8262289 [lworld] LoopNode::verify_strip_mined fails

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8263672 fatal error: no reachable node should have no use

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8264649 runtime/InternalApi/ThreadCpuTimesDeadlock.java crash in fastdebug C2 with -XX:-UseTLAB

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8267212 test/jdk/java/util/Collections/FindSubList.java intermittent crash with "no reachable node should have no use"

          • P3 - Major loss of function.
          • Resolved
          links to

          Commit Commit openjdk/jdk/20297a1b

          Review Review openjdk/jdk/3012

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              roland Roland Westrelin
              roland Roland Westrelin
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                Created:
                Updated:
                Resolved: