IV21461: INTERNAL COMPILER ERROR IN XLCCODE WITH -O2

January 2013 PTF for XL C for AIX, V10.1
January 2013 PTF for XL C/C++ for AIX, V10.1
XL C/C++ for AIX Fix Pack 18 (July 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 19 (October 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 21 (October 2015 PTF) for 10.1
XL C for AIX Fix Pack 21 (October 2015 PTF) for 10.1
September 2012 PTF for XL C for AIX, V10.1
September 2012 PTF for XL C/C++ for AIX, V10.1
XL C for AIX Fix Pack 18 (July 2013 PTF) for 10.1
XL C for AIX Fix Pack 19 (October 2013 PTF) for 10.1
XL C for AIX Fix Pack 20 (October 2014 PTF) for 10.1
XL C/C++ for AIX Fix Pack 20 (October 2014 PTF) for 10.1

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:

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

  IV24369 LI76879 LI76895 IV25664 LI76941 LI77025 LI77080

Fix information

• Fixed component name

  XL C AIX

• Fixed component ID

  5724U8000

Applicable component levels