LI75869: XLCCODE FALSELY SWAPPING COMPARE INSTRUCTIONS

June 2011 Update for XL C/C++ for Linux, V10.1
XL C/C++ for Linux Fix Pack 8 (January 2014 Update) for 10.1
January 2011 Update for XL C/C++ for Linux, V10.1
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

• Under certain conditions, when an instruction which uses
  conditional register has not branched, the compiler is
  supposed to return without making any changes to compare
  statements below it. This was incorrectly handled.
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  Any user using XL C/C++ for AIX, V10.1 or later compilers may
  be affected by this issue.
  
  PROBLEM DESCRIPTION:
  The compiler code for POWER6 swapped the operand of compare,
  but didn't change the consumer of conditional registers
  accordingly.
  

Problem conclusion

• The compiler has been fixed to handle the changes properly.
  

Temporary fix

Comments

APAR Information

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

  IZ84963

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

Fix information

• Fixed component name

  XL C/C++ SLES10

• Fixed component ID

  5724U8300

Applicable component levels

• RA10 PSN IZ84963

     UP06/09/13