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optimization question

To: help-gcc at gnu dot org
Subject: optimization question
From: Igor Schein <igor at txc dot com>
Date: Fri, 7 Jan 2000 14:40:24 -0500
Reply-To: igor at txc dot com

Hi,

let's say I don't trust gcc info pages because they
might be outdated.  Is there a way to determine which exactly
optimizations are chosen at any -On level?  Also, what
is the maximum level of optimization?  info pages only talk
about -O3 and below, but I see people use -O6 and even -O9.

Thanks

Igor

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