PI59428: COMPILER GENERATES INVALID CODE WITH OPT(2)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Compiler generates invalid code with OPT(2)
  

Local fix

• Do not use optimization.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V5.2 compiling     *
  *                 programs with OPT(2) that contain several    *
  *                 successive compares for equality with no     *
  *                 intervening code (e.g. IF A = X AND B = X).  *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect output at runtime: The        *
  *                      optimizer will attempt to combine       *
  *                      several smaller compares into one       *
  *                      larger compare. Rarely, it would do so  *
  *                      when the combined compare would have    *
  *                      different behavior than the individual  *
  *                      compares.                               *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  *                                                              *
  ****************************************************************
  The optimizer can combine successive compares if the data items
  being compared are sequential in memory. The optimizer was
  incorrectly combining compares at OPT(2) by only considering
  the offsets of the data items and not which base addresses they
  were relative to.
  

Problem conclusion

• The optimizer will now only combine successive compares if the
  data items are consecutive relative to the same base addresses.
  

Temporary fix

Comments

APAR Information

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

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

  PI63123

Modules/Macros

•    IGYCBE
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655W3200

Applicable component levels

• R520 PSY UI38258

     UP16/06/02 P F606

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.