Subject: Re: bug#76559: 31.0.50; [-O3 + PGTK] Crash when 'copying as kill'/'killing word'

From: Paul Eggert <[email-masked]>
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.