[workstream] DXIL Legalization and Lowering

[damyanp]

Milestones

Compile particle_life.hlsl (#20)

• Inlining
  • [DXIL] Always inline HLSL functions by default llvm-project#89282
• Scalarization
  • [0009] A proposal for DXIL Function Scalarization #62
  • [0010] Dxil data scalarization proposal #72
  • [DirectX] Enable the Scalarizer pass in the DirectX backend llvm-project#105178
  • Add support for DirectX intrinsics to the scalarizer pass llvm-project#107433
  • Write a pass for Data layout scalarization llvm-project#107920

[farzonl]

This looks done.