JIT stencil generation for i686-pc-windows-msvc has issues with SSE
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 77.2k
- Forks
- 35.9k
- PR merge metrics
- PR metrics pending
Description
Bug report
Bug description:
When working on adding float operations in #146307 the bytecode generation the CI failed for only the [i686-pc-windows-msvc] build. Link to failing CI:
We can make the CI run by adding the -mno-sse flags:
https://github.com/python/cpython/pull/146307/changes/8559fb8b057364cdb20790380ac871e5100c9e12
Ideally we should not have to disable SSE at this might hurt performance.
CPython versions tested on:
CPython main branch
Operating systems tested on:
No response
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 failing i686-pc-windows-msvc CI job and the changes in PR #146307, then trace the JIT stencil bytecode generation involved in the float operations. Determine why the build needs -mno-sse and verify the fix by rerunning the affected CI build without disabling SSE.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100