[DirectX] Shader Flag Analysis to indicate use of Raw and Structured Buffers

[bharadwajy]

Two flags viz., ComputeShadersPlusRawAndStructuredBuffers and EnableRawAndStructuredBuffers are set based on use of raw and structured buffers.

• Implement shader flag analysis to set EnableRawAndStructuredBuffers if shader uses Raw or Structured buffers.
• Implement shader flag analysis to set ComputeShadersPlusRawAndStructuredBuffers if shader uses Raw or Structured buffers, SM Major is = 4 and is a compute shader

NOTE:EnableRawAndStructuredBuffers is required for particle life but ComputeShadersPlusRawAndStructuredBuffers depends on one extra condition and can be implemented alongside.

See DxilModule::CollectShaderFlagsForModule(ShaderFlags &Flags) - specifically setting of bool hasRawAndStructuredBuffer for the conditions to set the flag ComputeShadersPlusRawAndStructuredBuffers and EnableRawAndStructuredBuffers.

AC
Add tests that use Raw and Structure buffers to verify that the flags are appropriately set.

[coopp]

This issue is blocked at the moment by the need to generate proper IR for tests. ResourceKinds are not being picked up correctly for RWBuffer or StructuredBuffer.

[coopp]

Not blocked

[coopp]

Closing this issue as these flags being set are no longer needed or used. The PR created to set the flags has been closed out as well and not merged.

Tex opened microsoft/DirectXShaderCompiler#7003 to track addressing what to do with them long term.

[bogner]

I opened #122663 the other day, which seems to be a duplicate. We should discuss whether this is really "not needed"