Date: Sat, 30 Nov 2013 21:57:25 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Adrian Chadd <adrian@freebsd.org> Cc: Konstantin Belousov <kostikbel@gmail.com>, "current@freebsd.org" <current@freebsd.org> Subject: Re: RFC: (Unconditionally) enable -fno-strict-overflow for kernel builds Message-ID: <68552.1385848645@critter.freebsd.dk> In-Reply-To: <CAJ-VmomC6CMuo__etm7X6W8Hpg8MafL2StePdSz4Jn0XN6MGww@mail.gmail.com> References: <20131130135616.GA59496@kib.kiev.ua> <CAJ-VmomC6CMuo__etm7X6W8Hpg8MafL2StePdSz4Jn0XN6MGww@mail.gmail.com>
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In message <CAJ-VmomC6CMuo__etm7X6W8Hpg8MafL2StePdSz4Jn0XN6MGww@mail.gmail.com> , Adrian Chadd writes: >> The compiler authors take the undefined part there as a blanket to perform >> optimizations which are assuming that signed overflow cannot happen. That's sufficient explanation for me to support your proposal. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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