Xpg; Xprofile=P - Sun Microsystems SunSoft Pascal 4.0 User Manual

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-xpg

-xprofile=p

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Generates the highest level of optimization. Uses optimization algorithms that
take more compilation time or that do not have as high a certainty of
improving execution time. Optimization at this level is more likely to improve
performance if it is done with profile feedback. See -xprofile=p.
If the optimizer runs out of memory, it tries to recover by retrying the current
procedure at a lower level of optimization and resumes subsequent procedures
at the original level specified in the command-line option.
Same as -p and -pg
(Solaris 2.x only) The -xprofile=p option collects data for a profile or use a
profile to optimize.
p must be collect, use[ :name ], or tcov.
Pascal 4.0 User's Guide