microsoft / microsoft/DirectXShaderCompiler
Incorrect application of semantic interpolation modifiers
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- Dominant language
- C++
- Stars
- 3.7k
- Forks
- 900
- Avg merge
- 2d 11h
- Merged PRs (30d)
- 44
Description
As highlighted in https://github.com/llvm/wg-hlsl/pull/432#discussion_r3422848837, DXC does not apply the modifiers in the same way as FXC and the documentation do.
This is likely an unintentional deviation from the expected behaviour and should be addressed as a bug.
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 with the Godbolt reproduction and the linked wg-hlsl discussion to identify how DXC differs from FXC and the documentation when applying semantic interpolation modifiers. Trace the relevant HLSL compiler behavior and verify the result against the reproduction. Done means DXC applies the modifiers consistently with the expected 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
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 52/100