HP UX Fortran Software manual Values for the +Oinlinebudget option

	inlining. This option has the following
	syntax:
	+Oinline_budget=n
	where n is an integer in the range 1 -
	1000000 that specifies the level of
	aggressiveness, as listed in Table on page
	70.
	The +Onolimit and +Osize options
	also affect inlining. Specifying the
	+Onolimitoption has the same effect as
	specifying +Oinline_budget=200. The
	+Osize option has the same effect as
	+Oinline_budget=1.
	Note, however, that the
	+Oinline_budget option takes
	precedence over both of these options.
	This means that you can override the effect
	of +Onolimit or +Osizeoption on
	inlining by specifying the
	+Oinline_budgetoption on the same
	command line.
	This option is only effective at optimization
	level 3 or higher.
Table 19 Values for the +Oinline_budget option
Values for n	Meaning
= 100	Default level of inlining.
> 100	More aggressive inlining. The optimizer is less restricted by compilation time and code size
	when searching for eligible routines to inline.
2 - 99	Less aggressive inlining. The optimizer gives more weight to compilation time and code size
	when determining whether to inline.
= 1	Only inline if it reduces code size.

+O[no]libcalls invokes millicode versions of a number of frequently called intrinsic functions; see Table on page

70.Millicode routines have very low call overhead and provide no error-handling. Use this option to improve the performance of selected library routines only when your program does not depend upon exception-handling.

The default is +Onolibcallsat optimization levels 0 and 1; at optimization level 2 or higher, the default is +Olibcalls.

Table 20 Millicode versions of intrinsic functions

acos	cos	pow
asin	exp	sin
atan	log	tan
atan2	log10

+o[no]libmerrno	Enable [disable] support for errnoin libm functions.
	The default is +Onolibmerrno.
+O[no]loop_block	+O[no]loop_blockenables or disables blocking of
	eligible loops for improved cache performance. The
	+Onoloop_blockoption disables both automatic and
	directive-specified loop blocking.

Fine-tuning optimization options 45