microsoft / microsoft/DirectXShaderCompiler
IDxcResult output enumeration is reporting multiple DXC_OUT_NONE values and missing supported DXC_OUT_ values.
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bug
- Dominant language
- C++
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Description
Description
Calling IDxcResult::GetNumOutputs( ) and enumerating outputs by index is returning incorrect results
Steps to Reproduce
IDxcResult* result; // Obtained from Compile( )
uint32_t numOutputs = result->GetNumOutputs();
std::cout << "Compiled result contains " << numOutputs << " outputs\n";
for (uint32_t i = 0; i < numOutputs; ++i)
{
std::cout << result->GetOutputByIndex(i) << " found\n";
}
Actual Behavior
The total number of supported outputs is correct, but DXC_OUT_NONE is reported multiple times.
Compiled result contains 6 outputs
Primary output is DXC_OUT_OBJECT
DXC_OUT_OBJECT found
DXC_OUT_ERRORS found
DXC_OUT_PDB found
DXC_OUT_HASH found
DXC_OUT_NONE found
DXC_OUT_NONE found
Environment
- DXC version dxcompiler.dll: 1.8 - 1.8.2403.37 (11e1318c3); dxil.dll: 1.8(101.8.2403.24)
- Host Operating System Windows 11
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 IDxcResult from Compile(), then inspect the implementations of GetNumOutputs() and GetOutputByIndex(). Verify the output enumeration against the supported DXC_OUT_ values; done means no duplicate DXC_OUT_NONE values are returned and all supported outputs are enumerated once.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100