PI53537: COBOL V5 MODULE SIZE WITH OPT(2) MUCH LARGER THAN V4.2 COMPILED MODULE FOR SOME MODULES

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• If there are very many opportunities for inlining, the inlined
  code can cause the module size to become quite large.
  

Local fix

• Using TEST(EJPD) will reduce inlining, though at the cost of
  additional global optimization.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V5.1 compiling     *
  *                 programs that contain many PERFORM           *
  *                 statements with compiler options OPT(1)      *
  *                 and OPT(2).                                  *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Performance: Binary object size much    *
  *                      larger than with previous versions of   *
  *                      Enterprise COBOL.                       *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  *                                                              *
  ****************************************************************
  Inlining of PERFORM statements caused large object size.
  

Problem conclusion

Temporary fix

Comments

• The compiler PERFORM inlining heuristics were changed to inline
  fewer PERFORMS, skipping some which are unlikely to give
  performance increase when inlined.
  

APAR Information

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

  PI51187

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

Modules/Macros

• IGYCBE
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655W3200

Applicable component levels

• R510 PSY UI33661

     UP15/12/16 P F512

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.