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LI77036: LONG COMPILE TIME WITH IPA

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When compiling a large source code test case with OPT(2), the
    IPA section takes a long time (~1 to 2hrs) to compile and
    eventually dies with 'exceeded virtual storage'.
    
    The following compile line was used:
    xlc -c test.c
    -Wc,"XR,AGG,OPT(2),LO,IPA(OBJ),LIBANSI,CSE,NOARG,RENT,NOSEQ,MAR(
    1,80)"
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: User using IPA to compile large programs     *
    ****************************************************************
    * PROBLEM DESCRIPTION: Long compile time for large functions   *
    *                      due to pointer analysis and new         *
    *                      shadows from IPA                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • Apply provided service.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI77036

  • Reported component name

    XL C/C++ FOR LI

  • Reported component ID

    5724X1400

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2012-10-10

  • Closed date

    2012-10-10

  • Last modified date

    2012-10-10

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

    PM63626

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

Modules/Macros

  • CCNEIPAO CCNEIPA3 CCNQIPA
    

Fix information

  • Fixed component name

    XL C/C++ FOR LI

  • Fixed component ID

    5724X1400

Applicable component levels

  • RB10 PSY

       



Document information

More support for: XL C/C++ for Linux

Software version: B10

Reference #: LI77036

Modified date: 10 October 2012