LI77080: INTERNAL COMPILER ERROR IN XLCCODE WITH -O2

November 2012 Update for XL C/C++ for Blue Gene/Q, V12.1
February 2013 Update for XL C/C++ for Blue Gene/Q, V12.1
May 2013 Update for XL C/C++ for Blue Gene/Q, V12.1

APAR status

• Closed as program error.

Error description

• When compiling a large testcase with -O2, the compiler abends in
  the xlCcode section of the compiler. The issue appears to be
  related to the use of -O2 with -g and -qcheck=all.
  
  ===== COMPILE COMMAND:
  xlC_r -c -O2 -q64 -qstrict -qrtti=all -Q -qmaxmem=-1 -g
  -qlibansi -qro -qroconst -qcheck=all -qtls a.cxx
  
  ===== ACTUAL OUTPUT:
  Internal compiler error in xlCcode
  
  
  ===== EXPECTED OUTPUT:
  The compiler should not produce an internal compiler error.
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  C users can be affected by this issue.
  
  PROBLEM DESCRIPTION:
  The compiler produces an internal compiler error when compiling
  a C program.
  

Problem conclusion

• An additional check is performed that prevents the optimizer
  from entering an error condition and causing an internal
  compiler error.
  

Temporary fix

Comments

APAR Information

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

  IV21461

• 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 PSN IV21461

     UP06/09/13