From: Joey Pabalinas <joeypabalinas@gmail.com>
To: Peter Stephenson <p.w.stephenson@ntlworld.com>
Cc: zsh workers <zsh-workers@zsh.org>
Subject: Re: crash/hang with gcc 5+ -O2 and --enable-zsh-mem
Date: Mon, 26 Feb 2018 15:13:24 -1000 [thread overview]
Message-ID: <20180227011324.pp4fiot5jtt5rpcc@gmail.com> (raw)
In-Reply-To: <20180226202446.08f467c8@ntlworld.com>
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On Mon, Feb 26, 2018 at 08:24:46PM +0000, Peter Stephenson wrote:
> Can't see a problem with this apart from a minor performance hit.
> calloc isn't used anywhere this would be a big deal, I don't think. I
> committed it, thanks.
>
> I suppose gcc really wants looking at too...
Cheers.
I honestly still am completely confused at how strlen() could in any
way be related to this (and yet, it most certainly is as far as gcc
is concered) and _why_ calloc() is even a viable candidate for malloc()
sibling-call optimization in the first place.
I am also sort of thinking this is a gcc bug, but I have no idea
where to even start looking in that abyss known to some as the
gcc codebase. I'll keep my ear to the ground regardless; I find it
*very* hard to believe that zsh is the only codebase affected
by this optimization peculiarity.
--
Joey Pabalinas
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prev parent reply other threads:[~2018-02-27 1:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-24 19:01 Mikael Magnusson
2018-02-25 0:13 ` Joey Pabalinas
2018-02-25 7:06 ` Joey Pabalinas
2018-02-25 7:07 ` Joey Pabalinas
2018-02-26 20:24 ` Peter Stephenson
2018-02-27 1:13 ` Joey Pabalinas [this message]
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