PH04497: The optimizer incorrectly infers two variables have the same value and subsequently uses a wrong value

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In the specific case leading to the APAR, the incorrect
  inference leads to the use of a constant as the source of a
  move, rather than the value of the actual source variable. There
  may be other variations.
  

Local fix

• Use OPT(0).
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V6.2 compiling     *
  *                 programs with compiler option OPT(1|2) with  *
  *                 program containing multiple PERFORM          *
  *                 statements of the same section where a       *
  *                 value computed in the PERFORM statement is   *
  *                 stored,outside the PERFORMed section, into   *
  *                 two or more different data-items and         *
  *                 the data-items are compared to each other.   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect runtime results for           *
  *                      comparison.                             *
  ****************************************************************
  * RECOMMENDATION: Apply provided the provided PTF.             *
  ****************************************************************
  An incorrect value was being propagated when a data-item
  computed inside two different PERFORM statements for the same
  section was stored to two different variables and then the two
  stored data-items were compared.
  

Problem conclusion

• Compiler was updated to avoid incorrect behaviour.
  

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:

Modules/Macros

• IGY8RWTU IGYCASMB IGYCCBE  IGYCCCRT IGYCCICS IGYCCSRV IGYCDGEN
  IGYCDIAG IGYCDMAP IGYCEN$0 IGYCEN$1 IGYCEN$2 IGYCEN$3 IGYCEN$4
  IGYCEN$5 IGYCEN$8 IGYCEN$D IGYCEN$R IGYCFGEN IGYCFREE IGYCINIT
  IGYCJA$0 IGYCJA$1 IGYCJA$2 IGYCJA$3 IGYCJA$4 IGYCJA$5 IGYCJA$8
  IGYCJA$D IGYCJA$R IGYCLIBH IGYCLIBO IGYCLIBR IGYCLSTR IGYCLVL0
  IGYCLVL1 IGYCLVL2 IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOB2E IGYCOPI
  IGYCOSCN IGYCPGEN IGYCRCTL IGYCRDPR IGYCRDSC IGYCREAL IGYCRWT
  IGYCSCAN IGYCSIMD IGYCUE$0 IGYCUE$1 IGYCUE$2 IGYCUE$3 IGYCUE$4
  IGYCUE$5 IGYCUE$8 IGYCUE$D IGYCUE$R IGYCXREF IGYDRV   IGYEQCWI
  IGYMSGE  IGYMSGK  IGYMSGT  IGYQCBE  IGYZQDRV IGYZQENU IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R620 PSY UI59885

     UP18/11/29 P F811

• R621 PSY UI59886

     UP18/11/29 P F811

• R622 PSY UI59887

     UP18/11/29 P F811

• R62H PSY UI59888

     UP18/11/29 P F811

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.