Article View: comp.lang.misc
Article #1181Re: JLG's flogging of horses
From: brnstnd
Date: Wed, 11 Apr 1990 02:11
Date: Wed, 11 Apr 1990 02:11
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In article <14319@lambda.UUCP> jlg@lambda.UUCP (Jim Giles) writes: > From article <20026@megaron.cs.arizona.edu>, by gudeman@cs.arizona.edu (David Gudeman): > > but a good enough compiler can detect all possible aliases by global > > control flow analysis, even with seperate compilation. > That's just the point. The _compiler_ can't do any such thing! That's > the _definition_ separate compilation - the different program units > are unknown to each other at compile time. That isn't true under ANSI C. Everything must work *as if* the program units were separately compiled; but optimizations don't have to respect separate compilation. ---Dan
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!think!yale!cmcl2!stealth.acf.nyu.edu!brnstndReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!think!yale!cmcl2!stealth.acf.nyu.edu!brnstnd From: brnstnd@stealth.acf.nyu.edu Newsgroups: comp.lang.misc Subject: Re: JLG's flogging of horses Message-ID: <7149:Apr1102:11:2590@stealth.acf.nyu.edu> Date: 11 Apr 90 02:11:25 GMT References: <20026@megaron.cs.arizona.edu> <14319@lambda.UUCP> Reply-To: brnstnd@stealth.acf.nyu.edu (Dan Bernstein) Distribution: usa Organization: IR Lines: 13 X-Original-Subject: Re: Relationship between C and C++)