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LI76054: LOOP/CRASH WITH QARCH PWR4 AND ABOVE

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When compiling a file at optimization level -O3 and
    specifying an architecture level of -qarch=pwr4 or higher, the
    compiler is taking a long time during the optimization stage,
    and eventually encounters an internal compiler error.
    
    
    ** foo   === End of Compilation 1 ===
    "foo.f", 1500-004 (U) INTERNAL COMPILER ERROR while compiling
    foo_.  Compilation ended.  Contact your Service Representative
    and provide the following information: Internal abort. For more
    information visit:
    http://www.ibm.com/support/docview.wss?uid=swg21110810
    1586-346 (U) An error occurred during code generation.  The code
    generation return code was 1.
    1501-511  Compilation failed for file foo.f.
    

Local fix

  • Compile with -qarch=pwr3
    

Problem summary

  • PROBLEM DESCRIPTION:
    When compiling a test case, the compiler is encountering an
    internal error.  The error itself takes a long time ( >1 hour)
    to reproduce, but the compiler can be seen looping on an
    internal function and taking a large percentage of CPU time
    after a few seconds of running.  Investigation showed that
    there is a infinite loop in dead code elimination.
    
    USERS AFFECTED:
    Users compiling with -qarch=pwr4 and up, as well as ppc.
    

Problem conclusion

  • The infinite loop was corrected, and the compiler completes the
    compiliation without error.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI76054

  • Reported component name

    XL FORTRAN LINU

  • Reported component ID

    5724X1600

  • Reported release

    D10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2011-04-27

  • Closed date

    2011-04-27

  • Last modified date

    2011-04-27

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

    IZ91541

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

Fix information

  • Fixed component name

    XL FORTRAN LINU

  • Fixed component ID

    5724X1600

Applicable component levels

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSAT4T","label":"XL Fortran for Linux"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"D10","Line of Business":{"code":"LOB57","label":"Power"}}]

Document Information

Modified date:
17 October 2021