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From: bobduff@world.std.com (Robert A Duff)
Subject: Re: Rules for Representation of Subtypes
Date: 1996/09/29
Message-ID: <DyGyFv.JA1@world.std.com>#1/1
X-Deja-AN: 185938971
references: <dewar.843920516@schonberg>
organization: The World Public Access UNIX, Brookline, MA
newsgroups: comp.lang.ada
Date: 1996-09-29T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <dewar.843920516@schonberg>,
Robert Dewar <dewar@schonberg.cs.nyu.edu> wrote:
>If you are using GNAT, you need not worry about this. ...

Well, *some* people might desire to write standard Ada, as opposed to
the GNAT dialect.  ;-)

Anyway, are you saying that GNAT fails to optimize cases like this:

    X: Integer range 1..10 := 1;
    ...
    if X < 10 then -- must be true

But what if the "..." contains an unchecked conversion that sets X to
11?

- Bob