microsoft / microsoft/DirectXShaderCompiler
Empty Payload struct not recognized in DXIL
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Description
When compiling an RT shader to Spir-v , the empty Payload struct is recognized - and the shader compiles just fine, however with DXIL the same shader fails to compile.
http://shader-playground.timjones.io/2ea9b49aff52b7bd018503d4a4df4bf5
struct Payload {};
[shader("miss")] void main(inout Payload payload) {}
I've tried disabling optimizations, however this did not have any effect.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the failure from the linked Shader Playground case using the empty Payload struct and miss shader shown in the issue, comparing SPIR-V and DXIL compilation. Trace the DXIL handling of empty payload structures and define done as compiling this shader successfully for DXIL without breaking the existing SPIR-V behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100