XL Fortran Enterprise Edition for AIX : User's Guide - IBM

compiler can optimize calls to these procedures (for example, by
eliminating save/restore sequences), because the calls never return to the
program. These procedures must not call any other parts of the program
that are compiled with -qipa.
inline=inline-options
The -qipa=inline= command can take a colon-separated list of inline
options, as listed below:
inline=auto | noauto
Specifies whether to automatically inline procedures.
inline=limit=number
Changes the size limits that the -Q option uses to determine how
much inline expansion to do. This established “limit” is the size
below which the calling procedure must remain. number is the
optimizer’s approximation of the number of bytes of code that will
be generated. Larger values for this number allow the compiler to
inline larger subprograms, more subprogram calls, or both. This
argument is implemented only when inline=auto is on.
inline=procedure_names
Specifies a list of procedures to try to inline.
inline=threshold=number
Specifies the upper size limit on procedures to be inlined, where
number is a value as defined under the inline suboption “limit”.
This argument is implemented only when “inline=auto” is on.
Note: By default, the compiler will try to inline all procedures, not just
those that you specified with the inline=procedure_names suboption.
If you want to turn on inlining for only certain procedures, specify
inline=noauto after you specify inline=procedure_names. (You must
specify the suboptions in this order.) For example, to turn off
inlining for all procedures other than for sub1, specify
-qipa=inline=sub1:inline=noauto.
isolated=procedure_names
Specifies a comma-separated list of procedures that are not compiled with
-qipa. Procedures that you specify as “isolated” or procedures within their
call chains cannot refer directly to any global variable.
level=level
Determines the amount of interprocedural analysis and optimization that is
performed:
0 Does only minimal interprocedural analysis and optimization.
1 Turns on inlining, limited alias analysis, and limited call-site
tailoring.
2 Full interprocedural data flow and alias analysis. Specifying -O5 is
equivalent to specifying -O4 and -qipa=level=2.
The default level is 1.
list=[filename | short | long]
Specifies an output listing file name during the link phase, in the event
that an object listing has been requested using either the -qlist or the
-qipa=list compiler option and allows the user to direct the type of output.
If you do not specify the filename suboption, the default file name is ″a.lst″.
XL Fortran Compiler-Option Reference 183