PI75059: AN UPDATE TO THE AUTOMATIC BINARY OPTIMIZER FOR Z/OS V1.2 TRIAL TO INCLUDE THE LATEST SERVICE FIXES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• This update to the Automatic Binary Optimizer for z/OS v1.2
  Trial includes the latest service fixes.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Automatic Binary        *
  *                 Optimizer (ABO) for z/OS, v1.2 Trial.        *
  ****************************************************************
  * PROBLEM DESCRIPTION: This service contains updates to ABO    *
  *                      that addresses the following issues     *
  *                      found in ABO for z/OS, v1.2:            *
  *                                                              *
  *                      1. When ABO optimizes input modules     *
  *                      that were compiled from very large      *
  *                      COBOL programs, ABO may abend with a    *
  *                      message "Assertion failed at            *
  *                      ../z/codegen/IBMCodeGenerator.cpp:1001  *
  *                      8",                                     *
  *                      in the OPTERR dataset.                  *
  *                                                              *
  *                      2. In some rare instances, if the       *
  *                      input to ABO is a dataset with a very   *
  *                      large number of load modules, ABO may   *
  *                      abend with the message "BOZ1003:        *
  *                      Program caught signal 11, exiting with  *
  *                      return code 16".                        *
  *                                                              *
  *                      3. In some rare instances, ABO may      *
  *                      incorrectly optimize program modules    *
  *                      compiled from COBOL source that         *
  *                      contained compare operations on         *
  *                      numeric redefines of alphanumeric data  *
  *                      items. This incorrect optimization may  *
  *                      result in an 0C7 abend when running     *
  *                      the ABO produced optimized module       *
  *                                                              *
  *                      4. In some rare instances, when         *
  *                      optimizing program modules compiled     *
  *                      from COBOL source that contained        *
  *                      sequences of COMPUTE operations on      *
  *                      packed decimal or zoned decimal data    *
  *                      items, ABO may abend with the message   *
  *                      "Assertion failed at                    *
  *                      ./NodeEvaluation.cpp:55" in the OPTERR  *
  *                      dataset.                                *
  *                                                              *
  *                      5. In some rare instances, ABO may      *
  *                      incorrectly detect the presence of      *
  *                      SERVICE LABELs even though none were    *
  *                      actually present in the original COBOL  *
  *                      source. In this case ABO produces the   *
  *                      message BOZ1455: unsupported feature    *
  *                      "ineligible SERVICE LABEL usage 1"      *
  *                      found and skips optimizing the CSECT.   *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  *                                                              *
  ****************************************************************
  The issues listed above, that were found in ABO for z/OS 1.2
  were fixed:
  
  1. ABO was modified to be able to successfully optimize
  modules compiled from some very large COBOL programs.
  
  2. ABO was modified such that it can successfully optimize all
  members of an input dataset, when that dataset contains a very
  large number of load modules.
  
  3. ABO was modified to correctly optimize these kinds of input
  modules that were compiled from COBOL source with redefines.
  
  4. ABO was modified to correctly optimize these kinds of load
  modules.
  
  5. ABO was modified so that it no longer incorrectly detects
  the presence of SERVICE LABEL statements where none were
  actually present in the original COBOL source.
  

Problem conclusion

• The ABO 1.2 Trial was updated such that:
  
  1. ABO can now correctly optimize load modules compiled from
  these large COBOL programs.
  
  2. ABO no longer abends when the input dataset contains a very
  large number of members.
  
  3. The ABO optimized load module no longer abends with an 0C7.
  
  4. ABO no longer abends and successfully optimizes the input
  module.
  
  5. ABO can successfully optimize these CSECTs that were
  previously skipped.
  

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:

  UI44038 UI44039

Modules/Macros

•    BOZMSGE  BOZMSGK  BOZMSGT  BOZOPT
  

Fix information

• Fixed component name

  AUTO BIN OPT TR

• Fixed component ID

  5697TR100

Applicable component levels

• R12J PSY UI44039

     UP17/01/20 P F701

• R120 PSY UI44038

     UP17/01/20 P F701

Fix is available

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