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From: Robert A Duff <bobduff@world.std.com>
Subject: Re: GNAT & GCC performace (bad news)
Date: 1999/12/06
Message-ID: <wcchfhwm64u.fsf@world.std.com>#1/1
X-Deja-AN: 557293259
Sender: bobduff@world.std.com (Robert A Duff)
References: <B46CA6A1.2991%Harald.Schmidt@tomcat.de>
 <38473D90.68D8F47@acenet.com.au> <1999Dec3.103807.1@eisner>
 <82fgh2$mt3$1@nnrp1.deja.com> <1999Dec6.073729.1@eisner>
Organization: The World Public Access UNIX, Brookline, MA
Newsgroups: comp.lang.ada
Date: 1999-12-06T00:00:00+00:00
List-Id: <comp.lang.ada>

kilgallen@eisner.decus.org (Larry Kilgallen) writes:

> The C compiler may also introduce optimizations specific to
> the machine that were not provided by the earlier compiler.
> If you read the propaganda for the Averstar Ada-to-C project,
> an aim seems to be to leverage effort machine manufacturers
> are already putting into optimizing their C compilers.  Of
> course there are other optimizations that can only be done
> well with the full Ada semantics.

Averstar's Ada-to-C compiler does Ada-specific optimizations, such as
removing constraint checks based on flow analysis, in the front end.  It
relies on the C compiler for the kinds of optimizations that C compilers
typically do.

- Bob