LI76552: IPRA CAUSING INCORRECT ASSERT FAILURE AT -O3

XL C/C++ for Linux Fix Pack 8 (January 2014 Update) for 10.1
January 2012 Update for XL C/C++ for Linux, V10.1
July 2012 Update for XL C/C++ for Linux, V10.1

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++ RHEL52

• Fixed component ID

  5724U8310

Applicable component levels

• RA10 PSN IZ98862

     UP06/09/13