[llvm-dev] Standard way to remove llvm intrinsics

Alberto Barbaro via llvm-dev llvm-dev at lists.llvm.org
Wed Dec 18 14:09:56 PST 2019

Thanks Eric,
I'll spend some time on it and try to understand how to ignore them.


Il giorno mer 18 dic 2019 alle ore 21:40 Eric Christopher <
echristo at gmail.com> ha scritto:

> Not a lot of us use the interpreter unfortunately - probably best to just
> change it to ignore those intrinsics rather than error or try to remove
> them.
> -eric
> On Wed, Dec 18, 2019 at 12:00 AM Alberto Barbaro <
> barbaro.alberto at gmail.com> wrote:
>> Hi Eric,
>> Currently I'm mainly playing with interpreter and trying to understand
>> how it exactly works. I have noticed that lli complains when llvm.dbg.value
>> is encounter that why I wanted to remove it. Additionally, I would like to
>> understand that performances with and without intrinsics and the impact
>> they have on the interpreter in general.
>> Thanks
>> Alberto
>> On Wed, Dec 18, 2019, 00:33 Eric Christopher <echristo at gmail.com> wrote:
>>> Typically this isn't done, debug information is a bit of a special case.
>>> I don't see much of a reason to have tool support for this necessarily, but
>>> would be happy to hear about possible use cases etc?
>>> Thanks!
>>> -eric
>>> On Mon, Dec 16, 2019 at 12:04 PM Alberto Barbaro via llvm-dev <
>>> llvm-dev at lists.llvm.org> wrote:
>>>> Hi all,
>>>> it is not the first time that I need to remove intrinsics from a bc and
>>>> in the past I saw options like -strip-debug for opt. Now I would like to
>>>> remove all the occurrences of llvm.lifetime.start and llvm.lifetime.end. I
>>>> have done in just obtaining the .ll file, grep -v lifetime, redirecting it
>>>> to another .ll and use llvm-as.
>>>> I was wondering if there is a standard way to decide which intrinsics
>>>> to remove or if at the moment it is not possible.
>>>> Thanks
>>>> Alberto
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> llvm-dev at lists.llvm.org
>>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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