HP Fortran Programmer's Guide (March 2010)

Performance and optimization
Using options to control optimization
Chapter 6160
+O[no]parmsoverlap +O2 or
higher
Suppress optimizations that assume [do
not assume] that arguments may refer to
the same memory locations. The default is
+Onoparmsoverlap.
+O[no]pipeline +O2 or
higher
Enable [disable] software pipelining. The
default is +Opipeline.
+O[no]procelim All Remove [do not remove] unreferenced
procedures from the executable. The
default is +Onoprocelim at levels 0 - 3,
+Oprocelim at level 4.
Table 6-3 Fine-tuning optimization options (Continued)
Option Level Function