llvm dev - Mar 2019 - missing handling of function attr 'ArgMemOnly' in pass 'functionattrs'

Hi All,

I notice that in pass 'functionattrs', there is no handling of function
attribute 'ArgMemOnly'.
Do you already has a patch or do you have plan to add this?

If no patch or no plan, maybe I can try to send a patch for this.

Thanks,
Fangqing
Xilinx Inc.
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Hi Fangqing,

I think there are no existed codes to deduce "argmemonly" attribute
for
function in LLVM. I saw codes in lib/Transforms/Utils/BuildLibCalls.cpp to
directly mark some lib functions as "argmemonly". There is also an
option
called -force-attribute option to force function to be argmemonly.

A patch for deducing "argmentonly" is useful, like for alias analysis,
it
can get more information to have more precise result.

Thanks,
Lin-Ya

Fangqing Du via llvm-dev <llvm-dev at lists.llvm.org> 於 2019年3月12日 週二
下午9:56寫道：
> Hi All,
>
> I notice that in pass 'functionattrs', there is no handling of
function
> attribute 'ArgMemOnly'.
> Do you already has a patch or do you have plan to add this?
>
> If no patch or no plan, maybe I can try to send a patch for this.
>
> Thanks,
> Fangqing
> Xilinx Inc.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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