what is the difference with and without crc extension support

[Dongjiu Geng]

Thanks for the answer, my source file is complex，it is not convenient
attach,  because it is company code.  According to your  experience，
what is the reason about it?

Martin Liška <mliska@suse.cz> 于2022年3月3日周四 21:48写道：
>
> On 3/3/22 14:41, Dongjiu Geng via Gcc wrote:
> > Hi,
> >       My program does not use CRC instructions，but I find the compiled
> > binary has much difference between using "-march=armv8-a+crc" and
> > using "-march=armv8-a". Even stranger, when I use
> > "-march=armv8-a+crc", I find my compiled binary can not run. but when
> > I change -O2 to -O0 based on "-march=armv8-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