HP UX Fortran Software manual +Onoparminit, +Opipeline

Table 29 Fine-tuning optimization options (continued)

Level	Level	Function
		compiler can be reduced by
		using this option.
+O[no]moveflops	+O2or higher	Enable [disable] moving
		conditional floating-point
		instructions out of loops. The
		default is +Omoveflops.
+O[no]parallel	+O3or higher	Transform [do not transform]
		eligible loops for parallel
		execution. The default is
		+Onoparallel.
		This option is available only
		on HP 9000 systems. On
		Integrity systems, you can
		use the +Oautopar option
		instead to parallelize loops.
+O[no]parminit	+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	+O2or higher	Enable [disable] software
		pipelining. The default is
		+Opipeline.
		NOTE: This option is valid
		only on the PA-RISC systems.
+O[no]procelim	All	Remove [do not remove]
		unreferenced procedures
		from the executable. The
		default is +Onoprocelimat
		levels 0 - 3, +Oprocelimat
		level 4.
+O[no]promote_indirect_calls	+O3or higher	Use profile data from
		profile-based optimization
		and other information to
		determine the most likely
		target of indirect calls and
		promotes them to direct
		calls. Indirect calls occur
		with pointers to functions
		and virtual calls.
		In all cases the optimized
		code tests to make sure the
		direct call is being taken and
		if not, executes the indirect
		call. If +Oinlineis in effect,
		the optimizer may also inline
		the promoted calls.
		+Opromote_indirect_calls
		is only effective with
		profile-based optimization.

96 Performance and optimization