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From: "Maxim Sobolev" <sobomax@mail.ru>
To: "Dan Nelson" <dnelson@emsphone.com>
Cc: "David O'Brien" <obrien@FreeBSD.ORG>, current@FreeBSD.ORG
Subject: Re[2]: gcc -Os optimisation broken (RELENG_4)
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-----Original Message-----
From: Dan Nelson <dnelson@emsphone.com>
To: "David O'Brien" <obrien@FreeBSD.ORG>
Date: Wed, 15 Mar 2000 15:57:27 -0600
Subject: Re: gcc -Os optimisation broken (RELENG_4)

> In the last episode (Mar 15), David O'Brien said:
> > On Wed, Mar 15, 2000 at 10:51:55AM -0600, Dan Nelson wrote:
> > > I get it with -O2 (-Os implies -O2, so it's probably the same
> > > problem).
> > 
> > Not quite.  -0s ==> all the -O2 optimizations that do not increase
> > code size.  -Os can also perform other optimizations not part of -O2
> > that decrease code size.  The -Os ==> -O2 only tells you how "risky"
> > in optimizing -Os is willing to be.
> 
> Too risky, apparently :)
> 
> Maxim: It looks like you've done quite a big of debugging already; can
> you get this bug to appear in a small piece of code?  I'm sure the gcc
> developers would be able to fix the problem pretty quickly if it's
> easily reproducable.

I'll try to.

-Maxim


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