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  1. JDK
  2. JDK-8236493

C2: Inconsistent known instance type information after EA

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Details

    • Bug
    • Status: Open
    • P3
    • Resolution: Unresolved
    • 11, 12, 13, 14, 15
    • tbd
    • hotspot

    Description

      JDK-8233164 fixed a problem where the type of a CheckCastPP was updated during EA (because the allocation was found to be non-escaping) but a Load and a subsequent CastPP user were not updated. This lead to incorrect re-wiring of memory edges.

      More such problems potentially exist, see discussion in this thread:
      https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2019-December/036622.html

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8233164 C2 fails with assert(phase->C->get_alias_index(t) == phase->C->get_alias_index(t_adr)) failed: correct memory chain

          • P3 - Major loss of function.
          • Resolved

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              thartmann Tobias Hartmann
              thartmann Tobias Hartmann
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              Dates

                Created:
                Updated: