PM96837: Optimizing compiler generates bad code.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After APAR PM74761, the error message is seen using compile
  option OPTIMIZE.  The compiler failed to handle large
  compilations.  It should not give this fatal error when
  optimizing large programs.
  IGYOP5201-U   INTERNAL COMPILER ERROR CODE "OSRVE-V1"
  This most likely happens in very large programs that have many
  statements such as MOVE SPACE TO A, MOVE SPACE TO B,
  MOVE SPACE TO C, etc one after another.  Such programs are
  usually created by EGL or a source language generator.
  

Local fix

• Compile with option NOOPT.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V4 who compile     *
  *                 with the OPTIMIZE compiler option            *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Either incorrect results per APAR       *
  *                      PM74761 or if PM74761 is installed then *
  *                      compiler abort with message             *
  *                      IGYOP5201-U   INTERNAL COMPILER ERROR   *
  *                      CODE "OSRVE-V1"                         *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  *                                                              *
  ****************************************************************
  The optimizer was saving values for possible re-use and an index
  into the saved values could overflow with certain code sequences
  such as thousands of subscripted MOVEs with no code flow verbs
  such PERFORM or CALL or GOTO.  APAR PM74761 fixed this overflow
  problem by ABORTing the compilation, but it was found that
  some programs would no longer compile with that fix.
  

Problem conclusion

• The optimizer is changed to not overflow the index of saved
  values so that correct code is generated and also so that the
  compiler does not ABORT.
  

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:

  PM98355 UK98159 UK98160

Modules/Macros

• IGYOCNTL IGYOCOMN IGYOCOMP IGYOENV  IGYOFCTA IGYOFOLD IGYOPRFM
  IGYORSCF IGYOSRVE IGY1ATXT
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655S7100

Applicable component levels

• R400 PSY UK98159

     UP13/10/08 P F310

• R420 PSY UK98160

     UP13/10/08 P F310

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.