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  1. JDK
  2. JDK-8237082

Workaround C2 limitations when working with long loops

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • None
    • repo-panama
    • tools

    Description

      Hotspot and Graal both have well-known issues when it comes to support bound-check-elimination in the presence of loops with 'long' induction variables.

      One possible, interim, solution would be to workaround this limitation in the foreign memory access implementation, by special casing 'small' memory segments.

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          relates to

          Enhancement - null JDK-8223051 support loops with long (64b) trip counts

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

          Enhancement - null JDK-8237077 C2 fails to optimize certain code shapes with memory access indexed var handles

          • P3 - Major loss of function.
          • Closed

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              mcimadamore Maurizio Cimadamore
              mcimadamore Maurizio Cimadamore
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                Created:
                Updated:
                Resolved: