LI77125: COMPILER DOES NOT DETECT __ROTATEL4 PATTERN

April 2013 Update for XL C/C++ for Linux, V12.1
XL C/C++ for Linux Fix Pack 8 (October 2015 Update) for 12.1
December 2012 Update for XL C/C++ for Linux, V12.1
XL C/C++ for Linux Fix Pack 4 (October 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 5 (December 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 6 (February 2014 Update) for 12.1
XL C/C++ for Linux Fix Pack 7 (May 2014 Update) for 12.1

APAR status

• Closed as program error.

Error description

• XLC compiler does not detect __rotatel4 pattern.
  Other compilers detect rotate code automatically.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users that compile with -q64 and optimization and have a
  specific shift pattern that could be a rotate may be affected by
  this issue.
  
  PROBLEM DESCRIPTION:
  The optimizer failed to detect opportunity to use a rotate
  instruction in 64-bit mode.
  

Problem conclusion

• The issue has been fixed.
  

Temporary fix

Comments

APAR Information

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

  IV30107

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

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5725C7300

Applicable component levels

• RC10 PSN IV30107

     UP06/09/13