Article View: comp.lang.misc
Article #2054Re: Whether cc after f2c can optimize arrays as well as f77 can
From: Dan Bernstein
Date: Wed, 14 Nov 1990 05:45
Date: Wed, 14 Nov 1990 05:45
32 lines
2001 bytes
2001 bytes
In article <5837@lanl.gov> jlg@lanl.gov (Jim Giles) writes:
> From article <4610:Nov1323:35:0390@kramden.acf.nyu.edu>, by brnstnd@kramden.acf.nyu.edu (Dan Bernstein):
> > [ as another supposed counterexample, an unreadable rendition of: ]
> Look who's talking. You're the one that always flattens them out to
> unreadible one-liners.
This is much more readable than your huge cut-and-paste format. Remember
the importance of context: it's much easier to read things that fit on
one page. My version below takes four lines, shows the variables and
procedures clearly, and doesn't distract the reader.
> > [ int a; main() { ... sub1(&a); } ]
> > [ sub1(x) { ... sub2(x); sub3(x); } ]
> > [ int a; sub2(y) { ... } ]
> > [ int b; sub3(z) { ... } ]
> > Now a and b are GLOBAL! My solution DOES detect what aliasing goes on!
> Really? I'm sorry. I don't see it.
Fortran does not have separate compilation like C. It does not have
static variables like C. Hence a and b are visible throughout---though
your C version does not reflect this accurately. The partitions for
sub1() include a and b, as do the partitions for sub2() and sub3().
Since you apparently didn't understand what I was saying, here goes
again:
> > Sorry for shouting, but I'm getting really sick of your unjustified
> > attacks. If your variables have visibility as in Fortran, it *works*. If
> > you're not talking about a program that can be expressed the same way in
> > Fortran, then you're not talking about the same problem.
---Dan
Technical Details
Message-ID:
<4962:Nov1405:45:5090@kramden.acf.nyu.edu>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!kramden.acf.nyu.edu!brnstndReferences:
<4610:Nov1323:35:0390@kramden.acf.nyu.edu> <5837@lanl.gov>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!kramden.acf.nyu.edu!brnstnd From: brnstnd@kramden.acf.nyu.edu (Dan Bernstein) Newsgroups: comp.lang.misc Subject: Re: Whether cc after f2c can optimize arrays as well as f77 can Message-ID: <4962:Nov1405:45:5090@kramden.acf.nyu.edu> Date: 14 Nov 90 05:45:50 GMT References: <4610:Nov1323:35:0390@kramden.acf.nyu.edu> <5837@lanl.gov> Organization: IR Lines: 32