LI77940: GRARNN ERROR WHEN NOT USING -QMAXMEM=-1

XL C/C++ for Linux Fix Pack 8 (October 2015 Update) for 12.1
XL C/C++ for Linux Fix Pack 7 (May 2014 Update) for 12.1

APAR status

• Closed as program error.

Error description

• The compiler is encountering an internal compiler error during
  the register allocation step in the xlCcode component of the
  compiler.  When compiling with the -qphsinfo option, the error
  is output after the OPTIMIZ stop.  The error typically looks
  similar to:
  
     Front End - Phase Ends;   2.580/  2.590
     W-TRANS   - Phase Ends;   0.030/  0.030
     OPTIMIZ   - Phase Ends;   3.250/  3.250
  
     1500-004: (U) INTERNAL COMPILER ERROR while compiling main.
     Compilation ended.  Contact your Service Representative and
     provide the following information: GRARNN: gr10110 is used
     before it is defined. For more information visit:
     http://www.ibm.com/support/docview.wss?uid=swg21110810
  
  Compiling with -qmaxmem=-1 may sometimes prevent the issue.
  

Local fix

• Lower optimization level, or increase the -qmaxmem limit.
  

Problem summary

• PROBLEM DESCRIPTION:
  A code optimization reorganizes some code without reorganizing
  it's dependents, resulting in an internal error.
  
  USERS AFFECTED:
  Large applications with nested loops.
  

Problem conclusion

• The optimization was corrected to avoid bad code
  reorganization.  Problem is fixed.
  

Temporary fix

Comments

APAR Information

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

  IV52183

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

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5725C7300

Applicable component levels

• RC10 PSN IV52183

     UP06/09/13