[PATCH] D80858: [CUDA][HIP] Support accessing static device variable in host code

Thu Jul 23 12:58:58 PDT 2020

yaxunl added a comment.

In D80858#2170328 <https://reviews.llvm.org/D80858#2170328>, @hliao wrote:

> In D80858#2169534 <https://reviews.llvm.org/D80858#2169534>, @yaxunl wrote:
>
> > Another reason is that we need to support it in rdc mode, where different TU can have static var with the same name.
>
>
> That's an issue of our current RDC support through LLVM IR instead of native code. The name conflicts are introduced as we link all TUs into a single module at IR level. The frontend should not be changed to support that.

I am not sure if ISA level linking would help for this. My understanding is that the linker will rename the internal symbols having the same name from different objects. It does not matter if it is llvm-link or native linker. Once they are renamed we can no longer find them by name.

I don't see a reason why we cannot support accessing static device variable in FE. We have requests for this feature from different users.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80858/new/

https://reviews.llvm.org/D80858