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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."

From: Paul Eggert
Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
Date: Sun, 31 Dec 2006 17:21:26 -0800
User-agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux)

"Daniel Berlin" <address@hidden> writes:

>> and
> Note the distinct drop in performance across almost all the benchmarks
> on Dec 30, including popular programs like bzip2 and gzip.

That benchmark isn't that relevant, as it's using -O3, as is typical
for SPEC benchmarks.

This discussion is talking about -O2, not -O3.  The proposed change
(i.e., having -O2 imply -fwrapv) would not affect -O3 benchmark

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