lit - A Software Testing Tool
About
lit is a portable tool for executing LLVM and Clang style test suites, summarizing their results, and providing indication of failures. lit is designed to be a lightweight testing tool with as simple a user interface as possible.
Features
Portable!
Flexible test discovery.
Parallel test execution.
Support for multiple test formats and test suite designs.
Documentation
The official lit documentation is in the man page, available online at the LLVM Command Guide: http://llvm.org/cmds/lit.html.
Source
The lit source is available as part of LLVM, in the LLVM source repository: https://github.com/llvm/llvm-project/tree/main/llvm/utils/lit
Contributing to lit
Please browse the issues labeled tools:llvm-lit in LLVM’s issue tracker for ideas on what to work on: https://github.com/llvm/llvm-project/labels/tools%3Allvm-lit
Before submitting patches, run the test suite to ensure nothing has regressed:
# From within your LLVM source directory.
utils/lit/lit.py \
--path /path/to/your/llvm/build/bin \
utils/lit/tests
Note that lit’s tests depend on not and FileCheck, LLVM utilities. You will need to have built LLVM tools in order to run lit’s test suite successfully.
You’ll also want to confirm that lit continues to work when testing LLVM. Follow the instructions in http://llvm.org/docs/TestingGuide.html to run the regression test suite:
make check-llvm
And be sure to run the llvm-lit wrapper script as well:
/path/to/your/llvm/build/bin/llvm-lit utils/lit/tests
Finally, make sure lit works when installed via setuptools:
python utils/lit/setup.py install lit –path /path/to/your/llvm/build/bin utils/lit/tests
2 maintainers
Release files for lit 23.1.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| lit-23.1.2.tar.gz | 199.8 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| lit-23.1.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 311.0 kB
Release files / lit-23.1.2.tar.gz
| Download URL | lit-23.1.2.tar.gz |
|---|---|
| Size | 199.8 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.13
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Transparency logRelease files / lit-23.1.2-py3-none-any.whl
| Download URL | lit-23.1.2-py3-none-any.whl |
|---|---|
| Size | 111.2 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.13
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Sep 22, 2026.
Transparency log
