PM71320: INCORRECT IF STATEMENT WITH OPTIMIZE(2)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An IF statement is always being evaluated as TRUE when
  optimization level 2 is used.
  
  
       =====  TEST EXAMPLE  =====
  
   if (myValue > 0)
    myResult += myValue;
  
  
  Code generated by previous compiler:
  @1L98    DS       0H
           AL       r8,#SPILL21(,r13,320)
           LTR      r9,r9
           BNH      @1L68                   // BRANCH
           ST       r8,#SPILL21(,r13,320)
           B        @1L68
  
  
  
  Code now generated:
  @1L98    DS       0H
           LCR      r0,r8
           SRA      r0,31
           NR       r8,r0
           L        r1,#SPILL21(,r13,320)
           ALR      r1,r8
           ST       r1,#SPILL21(,r13,320)
           B        @1L68
  

Local fix

• Do not use optimization.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of C/C++                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: Bad code gen for IF statement at O2     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Apply provided service.
  

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:

  UK83284

Modules/Macros

• CCNECICS CCNECWI  CCNEDSCT CCNEDWRT CCNED1D0
  CCNEFILT CCNEHIFC CCNEMDEP CCNEOPTP CCNEP    CCNEPP   CCNETBY
  CCNMSGE  CCNMSGT
  

Fix information

• Fixed component name

  C/C++ FOR MVS

• Fixed component ID

  56551210A

Applicable component levels

• R780 PSY UK83284

     UP12/12/08 P F212

Fix is available

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