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From: Dongjiu Geng <gengdongjiu1@gmail.com>
Date: Thu, 3 Mar 2022 21:52:36 +0800
Message-ID: <CABSBigTiBK5ov4goB6AqRJgWPcA=wbBrU5OvPzw4BOcxV_acAA@mail.gmail.com>
Subject: Re: what is the difference with and without crc extension support
To: =?UTF-8?Q?Martin_Li=C5=A1ka?= <mliska@suse.cz>
Cc: gcc@gcc.gnu.org
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Thanks for the answer, my source file is complex=EF=BC=8Cit is not convenie=
nt
attach,  because it is company code.  According to your  experience=EF=BC=
=8C
what is the reason about it?

Martin Li=C5=A1ka <mliska@suse.cz> =E4=BA=8E2022=E5=B9=B43=E6=9C=883=E6=97=
=A5=E5=91=A8=E5=9B=9B 21:48=E5=86=99=E9=81=93=EF=BC=9A
>
> On 3/3/22 14:41, Dongjiu Geng via Gcc wrote:
> > Hi,
> >       My program does not use CRC instructions=EF=BC=8Cbut I find the c=
ompiled
> > binary has much difference between using "-march=3Darmv8-a+crc" and
> > using "-march=3Darmv8-a". Even stranger, when I use
> > "-march=3Darmv8-a+crc", I find my compiled binary can not run. but when
> > I change -O2 to -O0 based on "-march=3Darmv8-a+crc",  it can run. I  do
> > not  know what is the reason.. can you answer it? Thanks.
>
> Hello.
>
> Please report bug here:
> https://gcc.gnu.org/bugzilla/
>
> and attach a pre-processed source file:
> https://gcc.gnu.org/bugs/
>
> Martin