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- From: alhy@unixhub.slac.stanford.edu (J. Scott Berg)
- Newsgroups: comp.unix.aix,slac.users.aix
- Subject: xlf compiler preprocessors
- Message-ID: <4840@unixhub.SLAC.Stanford.EDU>
- Date: 25 Jul 92 12:11:34 GMT
- Sender: news@unixhub.SLAC.Stanford.EDU
- Reply-To: alhy@unixhub.slac.stanford.edu
- Followup-To: comp.unix.aix
- Organization: Stanford University, dept of Physics / SLAC
- Lines: 23
- Nntp-Posting-Host: courant.slac.stanford.edu
-
- Can anyone explain to me why/when/if I should use the -Pk or -Pv
- preprocessors instead of/in addition to the -O optimization? I have
- some fortran code (LAPACK, in particular) that I want to optimize for
- speed. The manual makes it rather unclear what exactly -O does, so I
- can't figure out if -Pk and/or -Pv do more or less optimization
- ("There may be other optimizations performed also" is written after a
- list that is headed with "The OPT option performs some of the
- optimization techniques outlined below"). Thanks
-
- -Scott Berg
-
- --
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- The opinions expressed here are, of course, my own and nobody else's.
- -------------------------------------------------------------------------------
- J. Scott Berg
- email: alhy@unixhub.slac.stanford.edu
- real mail: Varian Physics
- Stanford CA 94305-4060
- phone: (415) 926-4732 (w)
- (415) 328-8246 (h)
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