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  1. JDK
  2. JDK-8204502 Vector API Umbrella Tracking Issue
  3. JDK-8204543

C2: Implement strict & relaxed identity semantics for vectors

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    • Type: Sub-task
    • Status: Open
    • Priority: P3
    • Resolution: Unresolved
    • Affects Version/s: repo-panama
    • Fix Version/s: repo-panama
    • Component/s: hotspot
    • Labels:

      Description

      On API/bytecode level, vectors are represented as Objects, but C2 aggressively eliminates vector boxes.

      Some existing vector-specific optimizations can break identity invariants which hold for ordinary objects.

      Use "strict" identity semantics by default, but allow users to opt-it for aggressive optimizations.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            vlivanov Vladimir Ivanov
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              Created:
              Updated: