PH09545: After PI98909, compare problems with varying length reference modified PIC X(1) parameters

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• PI98909 introduced an optimization to recognize when an
  alphanumeric EQUAL or NOT EQUAL comparison between a literal and
  a fixed length data name is true or not at compile time. The
  optimization doesn't account for the PIC X(1) parameter idiom
  where the X(1) is used as a placeholder for an actually much
  longer parameter accessed through reference modification
  exceeding the declared length.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V6.2 compiling and *
  *                 running programs containing alphanumeric or  *
  *                 national EQUAL or NOT EQUAL relational       *
  *                 comparison operations between a              *
  *                 variable-length referenced modified operand  *
  *                 and a literal, or a variable-length group    *
  *                 operand and a literal, where the byte        *
  *                 length of the literal is longer than the     *
  *                 maximum fixed length of the other operand,   *
  *                 and the extraneous bytes of the literal      *
  *                 contain non-blank EBCDIC or national         *
  *                 characters.                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: Undesired optimized runtime results and *
  *                      compile-time warning message:           *
  *                                                              *
  *                      IGYPG3173-W The result of the           *
  *                      comparison of operands op1 and op2 is   *
  *                      known at compile time, based on the     *
  *                      attributes of the operands.             *
  *                      Unconditional code was generated.       *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  The compiler was unexpectedly applying an optimization to
  alphanumeric and national literal comparisons involving
  variable-length reference modified items and variable-length
  group items.
  

Problem conclusion

• The compiler was changed to produce conditional code when the
  operand compared to the literal is either a variable-length
  reference modified item or a variable-length group item. Also,
  the warning message will not be issued.
  

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:

  UI62019 UI62020 UI62021 UI62022 PH10714 PH10717

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 IGYCOB2  IGYCOB2E
  IGYCOPI  IGYCOPT  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 UI62019

     UP19/03/29 P F903

• R621 PSY UI62020

     UP19/03/29 P F903

• R622 PSY UI62021

     UP19/03/29 P F903

• R62H PSY UI62022

     UP19/03/29 P F903

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.