LI74260: INCORRECT OUTPUT WITH -QHOT

January 2010 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
August 2009 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
May 2010 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
August 2010 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
December 2010 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
April 2011 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
August 2011 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
December 2011 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
April 2012 Update for XL Fortran Advanced Edition for Blue Gene/P, V11.1
XL Fortran Advanced Edition for Blue Gene/P Fix Pack 17 (October 2013 Update) for 11.1

APAR status

• Closed as program error.

Error description

• Using -qhot generates incorrect output.
  

Local fix

• Use -qnohot.
  

Problem summary

• In rare cases, users of IPA who use loop optimizations (-qhot)
  may get incorrect output.
  

Problem conclusion

• An extra temporary variable is introduced by the compiler to
  guarantee a correct output.  Such a variable will only be
  generated if the compiler suspects that this problem may occur.
  There's no perfomance impact with the added temporary variable.
  

Temporary fix

Comments

APAR Information

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

  LI74154

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

Fix information

• Fixed component name

  XL FORTRAN AE B

• Fixed component ID

  5799HJF00

Applicable component levels

• RB10 PSN LI74154

     UP06/09/13