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From: peter@ficc.ferranti.com (Peter da Silva)
Newsgroups: comp.lang.misc
Subject: Re: Whether cc after f2c can optimize arrays as well as f77 can
Message-ID: <0AZ6XW4@xds13.ferranti.com>
Date: 8 Nov 90 14:21:25 GMT
References: <2779:Nov608:20:1990@kramden.acf.nyu.edu> <5085@lanl.gov>
Reply-To: peter@ficc.ferranti.com (Peter da Silva)
Organization: Xenix Support, FICC
Lines: 12

In article <5085@lanl.gov> jlg@lanl.gov (Jim Giles) writes:
> version of 'sub' in file2, then the argument and the global would be
> aliased in that context - either slow code or unsafe optimizations
> must be accepted.

Aliasing can be detected at run time and appropriate code called. If the
code is short enough that this produces an unacceptable overhead, then
subroutine call time dominates anyway and the whole thing should have
been inline and it becomes a compiler problem.

(yes, I know this can lead to a combinatorial explosion... but I'm not
 convinced that a 2-way case isn't good enough.)
-- 
Peter da Silva.   `-_-'
+1 713 274 5180.   'U`
peter@ferranti.com