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[lit][docs] Mention LIT_OPTS instead of LIT_ARGS #147494

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[lit][docs] Mention LIT_OPTS instead of LIT_ARGS #147494

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13 changes: 11 additions & 2 deletions llvm/docs/TestingGuide.rst
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Expand Up @@ -152,15 +152,24 @@ can run the LLVM and Clang tests simultaneously using:

% make check-all

To run the tests with Valgrind (Memcheck by default), use the ``LIT_ARGS`` make
To run the tests with Valgrind (Memcheck by default), use the ``LIT_OPTS`` make
variable to pass the required options to lit. For example, you can use:

.. code-block:: bash

% make check LIT_ARGS="-v --vg --vg-leak"
% make check LIT_OPTS="-v --vg --vg-leak"

to enable testing with valgrind and with leak checking enabled.

To skip the evaluation of dependencies when iterating on tests, add suffix /fast
(automatically generated by cmake) to the make target, i.e.

.. code-block:: bash

% make check/fast LIT_OPTS="--filter <...>"

note that this way no changes to source files, besides tests, will be picked up.

To run individual tests or subsets of tests, you can use the ``llvm-lit``
script which is built as part of LLVM. For example, to run the
``Integer/BitPacked.ll`` test by itself you can run:
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