LI77506: LONG COMPILE TIME WITH OPTIMIZATION

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When compiling certain source files with optimization, compile
    time is very long, and gets worse with higher levels of -O.
    When using the -qphsinfo option, a large portion of the time is
    spent in the OPTIMIZ stage.
    

Local fix

Problem summary

  • PROBLEM DESCRIPTION:
    Long compilation time when using -O3 due to a specific
    optimization.
    
    USERS AFFECTED:
    Any user that has code with certain optimization opportunities.
    

Problem conclusion

  • An improvement was made to the compiler optimizer that pushes
    the generation of optimization metrics to when they are
    required, instead of always performing them by default.
    Compile time will be reduced in cases where this optimization
    is used.  Generated code will not be affected.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI77506

  • Reported component name

    XL C/C++ FOR BG

  • Reported component ID

    5799AG100

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-07-16

  • Closed date

    2013-09-11

  • Last modified date

    2013-09-11

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

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

Fix information

  • Fixed component name

    XL C/C++ FOR BG

  • Fixed component ID

    5799AG100

Applicable component levels

  • RC10 PSY

       UP



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Document information


More support for:

XL C/C++ for Blue Gene/Q
Compiler

Software version:

12.1

Reference #:

LI77506

Modified date:

2013-09-11

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