llvm / llvm/offload-test-suite
[vulkan][KosmicKrisp] WaveIsFirstLane.test is producing incorrect results.
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Description
The DXC and Clang DXC results are both incorrect in the same way. This is a high likelyhood of a driver bug.
DXC results
Expected:
---
Name: ExpectedOut
Format: UInt32
Stride: 4
Data: [ 1, 0, 1, 1, 1, 0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Got:
---
Name: Out
Format: UInt32
Stride: 4
Data: [ 1, 0, 0, 0, 1, 0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Full Hex 64bit representation of Expected Buffer Values:
[ 0x1, 0x0, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0 ]
Full Hex 64bit representation of Actual Buffer Values:
[ 0x1, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0 ]
Clang Results
Comparison Rule: BufferExact
Expected:
---
Name: ExpectedOut
Format: UInt32
Stride: 4
Data: [ 1, 0, 1, 1, 1, 0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Got:
---
Name: Out
Format: UInt32
Stride: 4
Data: [ 1, 0, 0, 0, 1, 0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Full Hex 64bit representation of Expected Buffer Values:
[ 0x1, 0x0, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0 ]
Full Hex 64bit representation of Actual Buffer Values:
[ 0x1, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0 ]
Contributor guide
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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 WaveIsFirstLane.test referenced in the issue and reproduce it through both the DXC and Clang DXC Vulkan paths. Compare the expected and actual lane results, then investigate whether the discrepancy is in the test or a driver; done means the incorrect result is explained and the appropriate test or driver issue is identified.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- computer-graphics, testing-qa
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100