Add back support for force-inlining

[vchuravy]

https://github.com/JuliaGPU/GPUCompiler.jl/pull/335

cc: @matinraayai @lcw

[lcw]

That would be great. I tried to add it to CUDA.jl and it is not working yet. See https://github.com/JuliaGPU/CUDA.jl/pull/1554 for details.

[vchuravy]

Thinking about this today, we have three options:

1. Add it as a parameter to kernel construction
2. Add it as a paramater to kernel launch
3. Turn it on by default

[matinraayai]

@vchuravy I think adding it as a parameter to kernel construction is a good idea.

[vchuravy]

@matinraayai would you be interested in trying to add that?

[matinraayai]

@vchuravy sure. How do I proceed?

[matinraayai]

@lcw it seems that your PR for adding force-inlining support has been merged. If so can we close this issue?

[lcw]

I think we still need to add forced inlining to the other GPU backends and then add a kernel construction parameter to kernel abstractions.

[matinraayai]

Okay I'll investigate GCN.