llvm-project

4d2d0afc - [HLSL] Implement HLSL Aggregate splatting (#118992)

[HLSL] Implement HLSL Aggregate splatting (#118992) Implement HLSL Aggregate Splat casting that handles splatting for arrays and structs, and vectors if splatting from a vec1. Closes #100609 and Closes #100619 Depends on #118842