On 3/3/22 14:52, Dongjiu Geng wrote:
Thanks for the answer, my source file is complex，it is not convenient
attach, because it is company code.
I see. So then you can try -fdump-tree-optimized and compare the corresponding
dump file.
Or you can use -fdump-tree-all -fdump-rtl-all and do the same.
According to your experience，
what is the reason about it?
Dunno.
Cheers,
Martin
Martin Liška <mli...@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
