LI76957: LOOP/SEGFAULT WITH -QIPA ON THE LINK STEP

September 2012 Update for XL C/C++ for Linux, V12.1
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

• When compiling and linking a large application with -qipa, the
  resulting binary either loops or segfaults during runtime.
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  Users of IPA may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  Runtime failure or segmentation fault due to incorrect
  aliasing.
  The problem is related to the aliasing of reference parameter
  shadows after inling.
  A dangling shadow symbol is recorded in the reference parameter
  entry.
  

Problem conclusion

• The fix is to make sure the reference parameter shadows
  recorded is the last mapped ones.
  

Temporary fix

Comments

APAR Information

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

  IV24367

• 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 IV24367

     UP06/09/13