LI77355: COMPILER ADDS UNNECESSARY STORE TO STACK

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
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

• The compiler adds unnecessary store instructions to the stack
  when not needed which could potentially slow down runtime
  performance.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users who compile their code with optimization may be affected
  by this issue.
  
  PROBLEM DESCRIPTION:
  Irrelevant stores are left in the code because the compiler
  does not fix the alias for the symbols on the store.
  

Problem conclusion

• Appropriate flags needed to be set inside the compiler to
  remove the irrelevant stores.
  

Temporary fix

Comments

APAR Information

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

  IV36931

• 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 PSY

     UP