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  1. JDK
  2. JDK-4859725

Win64/Lin64: C2 generating 2 unnecessary push/pop reg pairs on each method

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 1.4.2
    • Fix Version/s: 1.4.2
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      rc
    • CPU:
      itanium
    • OS:
      generic, linux

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        Description

        The IA64 server compiler implementation is generating 2 un-needed save
        and restores of the PFS and LC register on every method it compiles.
        Testing has shown that this cost us 5% of our performance when running
        pecJVM specJBB.

        The only routine which uses the LC register is the ClearArray service.
        We can increase performance by moving the LC save/restore within
        this routine.



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                Assignee:
                bobv Bob Vandette (Inactive)
                Reporter:
                bobv Bob Vandette (Inactive)
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