LI77105: INEFFICIENT VECTOR CONSTANT GENERATION

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Inefficient use/access of const vector datatypes in local scope
    as compared to global scope.
    

Local fix

  • N/A
    

Problem summary

  • PROBLEM DESCRIPTION:
    For local vector variables that are initialized by literals,
    the code generated is inefficient.  It loads and assigns each
    element on the stack, which could be improved by loading the
    whole vector literal once.
    
    USERS AFFECTED:
    User using bracelist initializers to initialize auto variables
    of vector type.
    

Problem conclusion

  • Local initialized vector variables are now saved and loaded
    from the contant area/TOC instead of the stack.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI77105

  • 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

    2012-11-23

  • Closed date

    2012-11-23

  • Last modified date

    2012-11-23

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

    IV21491

  • 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



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Document information


More support for:

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

Software version:

12.1

Reference #:

LI77105

Modified date:

2012-11-23

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