LI76274: IPRA CAUSING INCORRECT ASSERT FAILURE AT -O3

XL C/C++ for Linux Fix Pack 9 (August 2013 Update) for 11.1
July 2011 Update for XL C/C++ for Linux, V11.1
October 2011 Update for XL C/C++ for Linux, V11.1
June 2012 Update for XL C/C++ for Linux, V11.1
October 2012 Update for XL C/C++ for Linux, V11.1
XL C/C++ for Linux Fix Pack 8 (June 2013 Update) for 11.1

APAR status

• Closed as program error.

Error description

• When using -O3, a specific register allocation optimization
  called IPRA kicks in and causes an incorrect assert failure at
  runtime.
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  Users of opt level 3 and higher may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  A function was created by IPRA (Interprocedural register
  allocation) called IPRA.$set_req__4NodeFUiP4Node in 2 different
  object files.
  A call to this routine in one file called the instance in the
  other file.  The functions have different interfaces so the
  result was incorrect.
  These functions should never be visible outside the object file
  for which they were created.
  

Problem conclusion

• The compiler has been fixed so that it no longer calls the
  incorrect function.
  

Temporary fix

Comments

APAR Information

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

  IZ98862

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

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5724X1400

Applicable component levels

• RB10 PSN IZ98862

     UP06/09/13