IZ51668: INCORRECT OUTPUT WITH -QHOT

September 2012 PTF for XL Fortran for AIX, V12.1
October 2010 PTF for XL Fortran for AIX, V12.1
August 2009 PTF for XL Fortran for AIX, V12.1
November 2009 PTF for XL Fortran for AIX, V12.1
March 2010 PTF for XL Fortran for AIX, V12.1
April 2010 PTF for XL Fortran for AIX, V12.1
June 2010 PTF for XL Fortran for AIX, V12.1
February 2011 PTF for XL Fortran for AIX, V12.1
May 2011 PTF for XL Fortran for AIX, V12.1
July 2011 PTF for XL Fortran for AIX, V12.1
October 2011 PTF for XL Fortran for AIX, V12.1
February 2012 PTF for XL Fortran for AIX, V12.1
January 2013 PTF for XL Fortran for AIX, V12.1
XL Fortran for AIX Fix Pack 18 (July 2013) for 12.1
XL Fortran for AIX Fix Pack 19 (October 2013) for 12.1
May 2009 PTF for XL Fortran for AIX, V12.1
XL Fortran for AIX Fix Pack 20 (October 2014 PTF) for 12.1

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 AIX

• Fixed component ID

  5724U8200

Applicable component levels

• RC10 PSY