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List Archive: gentoo-amd64
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To: gentoo-amd64@g.o
From: Barry Schwartz <chemoelectric@...>
Subject: Re: Re: GCC-4.5.2 Has Serious Problems
Date: Thu, 30 Jun 2011 21:22:39 -0500
Frank Peters <frank.peters@...> skribis:
> A few days ago I posted about a possible problem with a floating
> point test called the UCBTEST.  After examining the source code
> of this test, I see violations of aliasing rules throughout.
> It's hard to efficiently manipulate variables without them.

C is essentially a glorified assembly language for PDP-11, designed
for bit-twiddling, which the original K&R book encouraged, and which
this code is doing. So all is well, from my point of view. :) Fancy
optimizations are not to be trusted on assembly code; never be afraid
to turn them off. You probably don’t need them, anyway. :)



Replies:
Re: Re: GCC-4.5.2 Has Serious Problems
-- Frank Peters
References:
GCC-4.5.2 Has Serious Problems
-- Frank Peters
Re: GCC-4.5.2 Has Serious Problems
-- Nikos Chantziaras
Re: GCC-4.5.2 Has Serious Problems
-- Nikos Chantziaras
Re: Re: GCC-4.5.2 Has Serious Problems
-- Frank Peters
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Updated Jun 28, 2012

Summary: Archive of the gentoo-amd64 mailing list.

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