[NFC][lit] discovery: find_tests_for_inputs: avoid py warning when no suites found
authorRoman Lebedev <lebedev.ri@gmail.com>
Mon, 22 Mar 2021 09:26:07 +0000 (12:26 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Mon, 22 Mar 2021 12:25:32 +0000 (15:25 +0300)
commitaae10a94ff12d1766e7d5a3ef743ae5fd7b0b60d
treecdca9b34831fa96c82f2fdd04df6349880e9c862
parent46b055287b80d038e5475e9c4c97603a62c91b80
[NFC][lit] discovery: find_tests_for_inputs: avoid py warning when no suites found

If lit was run on a directory that contained no suites,
then naturally suite[0] will not be there,
and that line would cause python warnings.

So just predicate it with a check that it is there in the first place.
llvm/utils/lit/lit/discovery.py