microsoft / microsoft/DirectXShaderCompiler
No way to remove struct names from shaders
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- Dominant language
- C++
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Description
Description
Struct names are left in shaders even when using -Qstrip_debug -Qstrip_priv -Qstrip_reflect
IDxcContainerBuilder::RemovePart also fails to remove them.
Steps to Reproduce
Compile any shader that's using a structured buffer with a named struct e.g. struct CSomething { ... } using the following command line arguments:
"-T"
"ps_6_6"
"-Zpr"
"-Qstrip_debug"
"-Qstrip_priv"
"-Qstrip_reflect"
"-E"
"BlackholePS"
"-Ges"
"-Wshadow"
"-WX"
"-Fo"
"out.cso"
"test.hlsl"
Make sure to run IDxcContainerBuilder::RemovePart with all the removable fourcc codes ("ILDB", "ILDN", "PRIV", etc.)
Actual Behavior
PIX is still able to detect struct names in the stripped DXIL, e.g.:
%ResourceIndexRootConstants = type { %struct.CResourceIndexRootConstants }
Environment
- DXC version 1.8.2505.28
- Host Operating System Windows 11 x64 24H2 26100.4349
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 issue with test.hlsl and the listed compiler arguments, then inspect IDxcContainerBuilder::RemovePart and the removable fourcc codes. Compare the resulting stripped DXIL with PIX's detection of the named struct. Done means struct names are no longer present or detectable after the requested stripping and part removal.
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
- Mostly clear
- Newbie friendliness
- 35/100