[llvm] [AMDPGU] Auto-upgrade ELF mangling in the data layout (PR #163644)

[via llvm-commits]

b-sumner wrote:

> > > > Generally we just update the four .ll files in the device library. Are there other libraries we're concerned about now where a warning wouldn't be desired?
> > > 
> > > 
> > > It's all the files with a data layout, and if we changed this I suppose there should be auto-upgrade anyway.
> > 
> > 
> > Aren't there only 4 files? Isn't the warning a good thing in general?
> 
> OpenMP currently uses these, HIP has `ockl` in addition I believe.
> 
> ```
>  "-mlink-builtin-bitcode" "/opt/rocm/amdgcn/bitcode/ocml.bc"
> ...
> ```

For those, I'd say the warning is exposing a problem which should be fixed by updating the 4 .ll files in the device library,

https://github.com/llvm/llvm-project/pull/163644