Deric C. 727f3921e7
[DirectX] Implement Shader Flags Analysis for ResMayNotAlias (#131070)
Fixes #112270

Completed ACs:
- `-res-may-alias` clang-dxc command-line option added
  - It inserts and sets a module metadata flag `dx.resmayalias` to 1
- Shader flag set appropriately:
- The flag IS NOT set if DXIL Version <= 1.6 OR the command-line option
`-res-may-alias` is specified
  - Otherwise the flag IS set when:
    - DXIL Version > 1.7 AND function uses UAVs, OR
    - DXIL Version <= 1.7 AND UAVs present globally
- Add tests 
- Tests for Shader Models 6.6, 6.7, and 6.8 corresponding to DXIL
Versions 1.6, 1.7, and 1.8
- Tests (`res-may-alias-0.ll`/`res-may-alias-1.ll`) for when the module
metadata flag `dx.resmayalias` is set to 0 or 1 respectively
- A frontend test (`res-may-alias.hlsl`) for testing that that the
command-line option `-res-may-alias` inserts `dx.resmayalias` module
metadata correctly
2025-04-10 16:06:48 -07:00
..