From: robert_dewar@my-dejanews.com
Subject: Re: Alternate to Unchecked_Conversion - Portable?
Date: 1999/02/22
Date: 1999-02-22T00:00:00+00:00 [thread overview]
Message-ID: <7aqe8i$us2$1@nnrp1.dejanews.com> (raw)
In-Reply-To: 36D06C1B.14FE920C@lmco.com
In article <36D06C1B.14FE920C@lmco.com>,
Steve Quinlan <steven.quinlan@lmco.com> wrote:
> At a minimum, you'd want to make first object aliased I'd
> think. I'm not sure whether without that, you'd be
> guaranteed that some optimization techniques wouldn't
> mess you up (register optimizations, etc.). Aliased at
> least lets the compiler know that the object might be
> accessed via some alternate path, so it will know not to
> do anything naughty to the object which might cause
> problems with access via an alias. Maybe one of the
> compiler internals experts will weigh in on this one.
Well using aliased may help here in practice, but it is
no guarantee that the compiler will do the "right thing".
Since this construct of overlaying is completely
implementation dependent, nothing a programmer can do
will guarantee that this will work portably.
In the "shot in the dark" mode, it will help perhaps to
make both objects volatile, so that all references are to
memory.
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next prev parent reply other threads:[~1999-02-22 0:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-02-21 0:00 Alternate to Unchecked_Conversion - Portable? Steve Doiel
1999-02-21 0:00 ` Steve Quinlan
1999-02-22 0:00 ` robert_dewar [this message]
1999-02-21 0:00 ` Matthew Heaney
1999-02-22 0:00 ` Tom Moran
1999-02-22 0:00 ` robert_dewar
1999-02-22 0:00 ` Samuel Mize
1999-02-22 0:00 ` Christopher Green
1999-02-23 0:00 ` Matthew Heaney
1999-02-23 0:00 ` Samuel Mize
1999-02-24 0:00 ` robert_dewar
1999-02-25 0:00 ` Nick Roberts
1999-02-25 0:00 ` robert_dewar
1999-02-26 0:00 ` Nick Roberts
1999-02-26 0:00 ` Matthew Heaney
1999-02-27 0:00 ` Nick Roberts
1999-02-24 0:00 ` robert_dewar
1999-02-23 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-24 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-26 0:00 ` Dale Stanbrough
1999-02-26 0:00 ` Robert A Duff
1999-02-23 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-24 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-25 0:00 ` dennison
1999-02-25 0:00 ` Christopher Green
1999-02-26 0:00 ` Tom Moran
1999-02-26 0:00 ` robert_dewar
1999-02-26 0:00 ` robert_dewar
1999-02-26 0:00 ` Christopher Green
1999-03-01 0:00 ` Nick Roberts
1999-03-01 0:00 ` dewar
1999-03-01 0:00 ` Nick Roberts
1999-02-26 0:00 ` Robert A Duff
1999-02-28 0:00 ` robert_dewar
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