title: Fortran program segfaults when compiled with armflang at -Ofast level
body: <p>I have a Fortran program, which works with <code>armflang</code> at <code>-O3</code> level but segfaults at <code>-Ofast</code> optimization level. What could be going wrong?</p>
  
  <p>Update: The problem is not specific to a workload. This happens for certain NCAR workloads and WRF 3.9.1.</p>