GNU bug report logs - #76559
31.0.50; [-O3 + PGTK] Crash when 'copying as kill'/'killing word'

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Message #134 received at 76559 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Po Lu <luangruo <at> yahoo.com>
Cc: Pip Cet <pipcet <at> protonmail.com>, iura.mail <at> gmail.com,
 Stefan Kangas <stefankangas <at> gmail.com>, michael.albinus <at> gmx.de,
 Eli Zaretskii <eliz <at> gnu.org>, 76559 <at> debbugs.gnu.org, marian.iurie <at> gmail.com
Subject: Re: bug#76559: 31.0.50; [-O3 + PGTK] Crash when 'copying as
 kill'/'killing word'
Date: Sat, 1 Mar 2025 22:54:45 -0800

On 2025-03-01 21:10, Po Lu wrote:
>> I don't see why that assumption would cause GCC to generate the wrong
>> code here, as no single thread of execution would have two such
>> accesses.
> It doesn't take control flow into account, but rather _every statement
> operand_ in the current procedure that addresses an aggregate declared
> in the same procedure.

In that case it's a GCC bug, right? Since GCC promises that one can do 
union punning.

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