[llvm-branch-commits] [llvm] [DXIL] Add support for root signature flag element in DXContainer (PR #123147)

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joaosaffran wrote:

I am not really sure we can have multiple root signatures in the backend. It is possible in HLSL because we can specify the entry function, therefore you can have multiple entries in a single file. However, when lowering into DXContainer, the binary format only allows a single signature to be present. 

I've reached other members of the team to discuss if this actually the case of if I am missing something.

https://github.com/llvm/llvm-project/pull/123147