LI74679: INCORRECT OUTPUT WITH -O3 AND -QARCH=450D

August 2009 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
May 2010 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
December 2010 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
XL C/C++ Advanced Edition for Blue Gene/P Fix Pack 17 (October 2013 Update) for 9.0
April 2011 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
August 2011 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
April 2012 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0
August 2012 Update for XL C/C++ Advanced Edition for Blue Gene/P, V9.0

APAR status

• Closed as program error.

Error description

• bgxlc seems to generate wrong code with "-O3 -qarch=450d" in
  specific cases. The same source code with "-O3 -qarch=450" gets
  the correct answer.
  

Local fix

• n/a
  

Problem summary

• Blue Gene L and P users are affected by this issue.
  
  Incorrect floating point results lead to incorrect result
  values from functions.
  

Problem conclusion

• The compiler has been fixed by repairing the way we remove an
  item from an array so that we correctly update the links
  associated with the array.
  

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:

  LI75702

Fix information

• Fixed component name

  XL C/C++ AE BG/

• Fixed component ID

  5799HJE00

Applicable component levels

• R900 PSY

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