IBM Support

IZ84495: CHAR CAST SHADOWS CAUSE POOR COMPILE TIME

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The XL C++ compiler is spending an excessive amount of time
    evaluating alias sets.
    

Local fix

  • Compile with -qalias=typeptr
    

Problem summary

  • PROBLEM DESCRIPTION:
    The C++ compiler front-end requires excessive amount of time to
    evaluate alias sets.
    
    USERS AFFECTED:
    Users who have compilation units where a char or unsigned char
    pointer has been cast to another type and dereferenced.
    

Problem conclusion

  • Problematic cast shadows involving char variables are now
    grouped into existing nodes that collapse the alias graph and
    avoid cycles.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ84495

  • Reported component name

    XL C/C++ AIX

  • Reported component ID

    5724X1300

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-09-10

  • Closed date

    2010-09-10

  • Last modified date

    2010-09-10

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

    IZ76715

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

Fix information

  • Fixed component name

    XL C/C++ AIX

  • Fixed component ID

    5724X1300

Applicable component levels

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGH3R","label":"XL C\/C++ for AIX"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}}]

Document Information

Modified date:
10 September 2010