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From: dewar@cs.nyu.edu (Robert Dewar)
Subject: Re: Language Efficiency
Date: 1995/04/19
Message-ID: <dewar.798335438@gnat>#1/1
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references: <D6uA77.Lqp@mcshub.dcss.mcmaster.ca> <dewar.797566928@gnat>
 	<D6vxDG.JKJ@mcshub.dcss.mcmaster.ca> <dewar.797636710@gnat>
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 <GRAHAM.95Apr19172404@canopus.compass-da.com>
organization: Courant Institute of Mathematical Sciences
newsgroups: comp.lang.ada
Date: 1995-04-19T00:00:00+00:00
List-Id: <comp.lang.ada>

Paul, in your example or initializing a malloc'ed variable, very trivial
value tracing would allow the compiler to know that the argument is
malloc (i..e. maximally) aligned. Yes, I know you can construct an example
where it is undecidable what the alignment is, but in fact value and
pointer type tracing in C can give remarkably accurate information.