b3ed4288bd
Implements metadata generation of a Root Signature from its in-memory representation. It follows the same style as: https://github.com/llvm/llvm-project/pull/139633. This pr handles `StaticSamplers`. It also handles converting the else-if chain into a `std::visit` to allow for future compiler warnings when adding additional `RootElement` variants. The metadata follows the format described [here](https://github.com/llvm/wg-hlsl/blob/main/proposals/0002-root-signature-in-clang.md#metadata-schema). - Implement `BuildStaticSampler` into HLSLRootSignature.h - Add sample testcases demonstrating functionality Note: there is no validation of metadata nodes as the `llvm::hlsl::rootsig::RootElement` that generates it will have already been validated. Resolves https://github.com/llvm/llvm-project/issues/126586