IV26851: INCORRECT BRANCH CONDITION GENERATED FOR VERSIONED LOOP

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    

Local fix

  • This issue can be avoided using the -Xjit:disableLoopVersioner
    option. This option may cause a noticeable performance
    degradation.
    

Problem summary

  • The JIT compiler was performing a loop optimization that
    resulted in an incorrect branch condition being generated in
    compiled code, resulting in the unintended execution of either a
    fast or slow loop.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR1
    6.0.1 SR2
    6.0.0 SR11
    5.0.0 SR14
    .
    The JIT compiler has been amended to prevent this incorrect
    behaviour.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV26851

  • Reported component name

    JAVA 5 JIT

  • Reported component ID

    620500124

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-08-22

  • Closed date

    2012-08-22

  • Last modified date

    2012-09-06

  • APAR is sysrouted FROM one or more of the following:

    IV19961

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    JAVA 5 JIT

  • Fixed component ID

    620500124

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

5.0

Reference #:

IV26851

Modified date:

2012-09-06

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