Date: Wed, 23 Jan 2013 13:31:40 -0800 From: Luigi Rizzo <rizzo@iet.unipi.it> To: Dimitry Andric <dim@freebsd.org> Cc: current@freebsd.org Subject: Re: __builtin_memcpy() slower than memcpy/bcopy (and on linux it is the opposite) ? Message-ID: <CA%2BhQ2%2BhBgLXa%2BfyFEUN%2BwLDct1%2BHXcoEHZivqtdWDLAhjJ=Uag@mail.gmail.com> In-Reply-To: <51003956.50301@FreeBSD.org> References: <20130123163238.GB56212@onelab2.iet.unipi.it> <51003956.50301@FreeBSD.org>
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On Wed, Jan 23, 2013 at 11:26 AM, Dimitry Andric <dim@freebsd.org> wrote: > Which compilation flags did you use to test this? When I compiled your > testcase program with clang 3.2, gcc 4.2 and gcc 4.7 at -O2, with all > other settings at their defaults, all three compilers just called libc's > memcpy() for the __builtin_memcpy tests. > just -O2 -Wall -Werror, no special -m* or -f* flags cheers luigi
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