DXC 1.8.2403 was released on Monday! It has full support for the SM 6.8 release!

https://github.com/microsoft/DirectXShaderCompiler/releases/tag/v1.8.2403

Release DX Compiler release for March 2024 · microsoft/DirectXShaderCompiler

DX Compiler release for March 2024 Shader Model 6.8 is fully supported Work Graphs allow node shaders with user-defined input and output payloads New Barrier builtin functions with specific memor...

GitHub