From: "Martin Liška" <mliska@suse.cz>
To: Dongjiu Geng <gengdongjiu1@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: what is the difference with and without crc extension support
Date: Fri, 4 Mar 2022 14:05:05 +0100 [thread overview]
Message-ID: <578a8550-f77f-df5f-8334-47fe3805c9c6@suse.cz> (raw)
In-Reply-To: <CABSBigTiBK5ov4goB6AqRJgWPcA=wbBrU5OvPzw4BOcxV_acAA@mail.gmail.com>
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 <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
next prev parent reply other threads:[~2022-03-04 13:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-03 13:41 Dongjiu Geng
2022-03-03 13:48 ` Martin Liška
2022-03-03 13:52 ` Dongjiu Geng
2022-03-04 13:05 ` Martin Liška [this message]
2022-03-04 18:20 ` Richard Earnshaw
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