This goes on top of MR 320 and 345.
-- v3: tests/shader-runner: Add a '--dump-dxil' command line switch. tests/shader-runner: Test shaders with dxcompiler. tests/shader-runner: Replace immediate shader type strings with an enum. tests/shader-runner: Do not exit if a 'require' directive is not met. tests/shader-runner: Handle individual keywords in shader directives. vkd3d-shader/dxil: Do not compile compute shaders. vkd3d-shader/dxil: Do not access null code blocks on failure. vkd3d-shader/dxil: Implement DX instruction LoadInput. vkd3d-shader/dxil: Declare shader inputs. vkd3d-shader/dxbc: Load input signatures also from ISG1 chunks. vkd3d-shader/spirv: Build undefined values once. vkd3d-shader/spirv: Introduce a Static Single Assignment register type.