what is the difference with and without crc extension support

[Martin Liška]

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