This parameter seems unintentional here; we're trying to grep
the input on stdin, from the earlier stage in the pipeline.
Since a recent update on Github Actions runners, the previous
form (grepping a file, while piping in data on stdin) would fail
running the test, with the test runner Python script throwing
an exception when evaluating it:
File "D:\a\llvm-mingw\llvm-mingw\llvm-project\llvm\utils\lit\lit\TestRunner.py", line 935, in _executeShCmd
out = procs[i].stdout.read()
^^^^^^^^^^^^^^^^^^^^^^
File "C:\hostedtoolcache\windows\Python\3.12.7\x64\Lib\encodings\cp1252.py", line 23, in decode
return codecs.charmap_decode(input,self.errors,decoding_table)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: a bytes-like object is required, not 'NoneType'
MinGW is GCC-like and does not support clang-cl, so clean up the lit cfg
to reflect that. Also mark all Windows test cases using clang-cl as
UNSUPPORTED for now. We should probably adapt most of these test cases
to use the GCC-like clang driver, but that will be for later.
Differential Revision: https://reviews.llvm.org/D147057
