IV30070: COMPILATION HANGS AT -O3 IN IPA

XL Fortran for AIX Fix Pack 11 (May 2015 PTF) for 14.1
XL Fortran for AIX Fix Pack 12 (August 2015 Update) for 14.1
XL Fortran for AIX Fix Pack 15 (April 2016 Update) for 14.1
XL Fortran for AIX Fix Pack 16 (July 2016 Update) for 14.1
XL Fortran for AIX Fix Pack 17 (November 2016 Update) for 14.1
XL Fortran for AIX Fix Pack 18 (February 2017 Update) for 14.1
XL Fortran for AIX Fix Pack 19 (August 2017 Update) for 14.1
March 2013 PTF for XL Fortran for AIX, V14.1
XL Fortran for AIX Fix Pack 4 (June 2013 PTF) for 14.1
XL Fortran for AIX Fix Pack 5 (September 2013 PTF) for 14.1
XL Fortran for AIX Fix Pack 6 (December 2013 PTF) for 14.1
XL Fortran for AIX Fix Pack 7 (March 2014 PTF) for 14.1
XL Fortran for AIX Fix Pack 8 (July 2014 PTF) for 14.1
XL Fortran for AIX Fix Pack 9 (October 2014 PTF) for 14.1
XL Fortran for AIX Fix Pack 10 (February 2015 PTF) for 14.1
XL Fortran for AIX Fix Pack 14 (December 2015 Update) for 14.1

APAR status

• Closed as program error.

Error description

• Compiling the provided test case hangs with -O3.
  -V shows that the hang is in IPA step.
  
  xlf95_r -F:mpxlf95_r -q64 -WF,-q64 -qsuffix=cpp=f90
  -qsuppress=1500-036 -O3 -qlist -qreport
  -qarch=pwr6 -qtune=balanced -qcache=auto
  -qfloat=fltint -qzerosize -qessl -bdatapsize:64k
  -bstackpsize:64k -qsmp=omp -qdirective -qextname
  -WF,-D__AIX,-D_AIX,-Dextname,-D_EXTNAME,-D__prism,-Duse_comm_MPI
  1,-D__cpl_mpiom,-D__cpl_co2  -c mo_midatm.f90
  
  -O2 works.
  

Local fix

• Use -O2 instead.
  

Problem summary

• PROBLEM DESCRIPTION: Compiling user programs containing
  consecutive MEM_DELAY directives with -O3 hangs during
  compilation.
  
  USERS AFFECTED: Fortran programs containing consecutive
  MEM_DELAY directives and compiles at -O3.
  

Problem conclusion

• Added the code to handle the consecutive calls to mem_dealy to
  avoid the splitting of them during loop distribution.
  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:

  LI77135

Fix information

• Fixed component name

  XL FORTRAN FOR

• Fixed component ID

  5725C7400

Applicable component levels

• RE10 PSY UP

     C