[Bug] Hexagon CI tests fail on tlc-pack/relax HEAD

[psrivas2]

I ran the Hexagon CI tests on Relax HEAD. I expected all tests to pass since they are not using Relax at all. However, 5 tests failed according to CI summary below:

=========================== short test summary info ============================
FAILED tests/python/contrib/test_hexagon/test_launcher.py::test_aot_executor[c]
FAILED tests/python/contrib/test_hexagon/test_launcher.py::test_aot_executor_multiple_conv2d[c]
FAILED tests/python/contrib/test_hexagon/test_models.py::test_mobilenet - Ass...
FAILED tests/python/contrib/test_hexagon/test_usmp.py::test_conv2d[c-False]
FAILED tests/python/contrib/test_hexagon/test_usmp.py::test_conv2d[c-True] - ...
= 5 failed, 786 passed, 1365 skipped, 15 xfailed, 752 warnings in 15744.57s (4:22:24)

These failures need to be investigated. Possible reasons for failure could be:

• These tests are already failing on TVM main
• Some important changes in TVM main might be lost in merge conflicts during last rebase of Relax.
• Some changes required for Relax actually break a feature required by Hexagon.

Here is the log file. CI ran when Relax Head is at 4329af78eb1dc4c4ff8a61d3bf39aa4034e9cb2a

[YuchenJin]

Thanks @psrivas2 for summarizing the Hexagon CI results!

Interestingly, all of these 5 tests are currently skipped in TVM main CI. I believe we can successfully run the test_launcher.py::test_aot_executor test 2 weeks ago with some branches in the relax repo. To locate the issue, we can check if the tests can pass locally with the relax branch and tvm main.