PH05465: THE COMPARE MAY BE INCORRECTLY EVALUATED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ERROR DESCRIPTION:
  USERS AFFECTED: Users of Enterprise COBOL Vx.x compiling
  programs that compare several pairs of data
  items in one IF statement where the two
  sets
  of data items are sequential and contiguous
  but at least one of the pairs of data items
  has differing sizes.
  
  PROBLEM DESCRIPTION: The compare may be incorrectly
  evaluated
  
  WORKAROUND/CIRCUMVENTION: Compile at OPT(0)
  
  RECOMMENDATION TO CUSTOMER: Apply the provided PTF
  
  PROBLEM SUMMARY: The optimizer may sometimes group sequential
  compares of data
  items into one larger compare. If one or more pairs have
  differing sizes (taking up a different amount of bytes), at
  least one additional byte will incorrectly be compared by the
  shorter sequence. As this byte is from a different data item,
  not intended to be compared at all, the result of the compare
  will be incorrect.
  
  CONCLUSION: The optimizer was fixed to only group sequential
  compares into
  one compare if each pair of data items has the same size.
  

Local fix

• WORKAROUND/CIRCUMVENTION: Compile at OPT(0)
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V6.2 compiling     *
  *                 programs that compare several pairs of data  *
  *                 items in one IF statement where the two      *
  *                 sets of data items are sequential and        *
  *                 contiguous but at least one of the pairs of  *
  *                 data items has differing sizes.              *
  ****************************************************************
  * PROBLEM DESCRIPTION: The compare may be incorrectly          *
  *                      evaluated.                              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  The optimizer may sometimes group sequential compares of data
  items into one larger compare. If one or more pairs have
  differing sizes (taking up a different amount of bytes), at
  least one additional byte will incorrectly be compared by the
  shorter sequence. As this byte is from a different data item,
  not intended to be compared at all, the result of the compare
  will be incorrect.
  

Problem conclusion

• The optimizer was fixed to only group sequential compares into
  one compare if each pair of data items has the same size.
  

Temporary fix

Comments

APAR Information

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

  PH05455

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

  UI60666 UI60667 UI60668

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 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 UI60666

     UP19/01/30 P F901

• R621 PSY UI60667

     UP19/01/30 P F901

• R622 PSY UI60668

     UP19/01/30 P F901

Fix is available

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