LI75295: INTERNAL COMPILER ERROR WITH -O3 -QSMP

May 2010 Update for XL Fortran for Linux, V12.1
January 2012 Update for XL Fortran for Linux, V12.1
January 2011 Update for XL Fortran for Linux, V12.1
June 2011 Update for XL Fortran for Linux, V12.1
XL Fortran for Linux Fix Pack 8 (January 2014 Update) for 12.1

APAR status

• Closed as program error.

Error description

• The following test case emits Internal compiler error (signal
  11) when:
  1. compiling with xlf -qfree=f90 -O3 -qsmp=omp -qstrict -c
  compiler.f90
  2. OpenMP PARALLEL section with DO-loop
  3. using COLLAPSE(2) in the DO-loop
  
  
  
  
  
  
  The example to reproduce the problem is:
         subroutine bla
         real a
         integer j,k
  !$OMP PARALLEL
  !$OMP DO COLLAPSE(2)
         do k=0,5
           do j=0,5
             a=a+1
           end do
         end do
  !$OMP END PARALLEL
         return
         end
  

Local fix

• 1. compiling with the extra flag -qhot=nosimd or -qnohot
  2. compiling with a higher (O4)or lower (O2) optimization level
  

Problem summary

• USERS AFFECTED:
  Users of XLF V12.1 with options -O3 and higher
  and options -qsmp=omp with source code
  using $OMP DO COLLAPSE directives.
  
  PROBLEM DESCRIPTION:
  Compiler abort with Internal Compiler Error.
  

Problem conclusion

• The problem is fixed.
  

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:

  LI75449 IZ76888

Fix information

• Fixed component name

  XL FORTRAN SLES

• Fixed component ID

  5724U8400

Applicable component levels

• RC10 PSY

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