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IZ83609: INCORRECT INSTRUCTION ORDER WITH -O3

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APAR status

  • Closed as program error.

Error description

  • When compiling an application making use of pointers to structs
    at -O3, generated code is in the wrong order.
    

Local fix

  • Compile with optimization disabled:  -O0
    

Problem summary

  • PROBLEM DESCRIPTION:
    An ignored address of an aggregate is producing wrong results
    when using optimization.
    
    USERS AFFECTED:
    Users of pointers to structs at high optimization.
    

Problem conclusion

  • The issue was corrected.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ83609

  • Reported component name

    XL C++ AIX

  • Reported component ID

    5724U8100

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-08-26

  • Closed date

    2010-10-05

  • Last modified date

    2010-10-05

Fix information

  • Fixed component name

    XL C AIX

  • Fixed component ID

    5724U8000

Applicable component levels

[{"Line of Business":{"code":"LOB08","label":"Cognitive Systems"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSJT9L","label":"XL C\/C++"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"A.1"}]

Document Information

Modified date:
06 October 2021