[llvm] [SLP] Better way to filter target-specific tests (PR #106720)

[Elvina Yakubova via llvm-commits]

ElvinaYakubova wrote:

> @ElvinaYakubova Just checking - does the update_test_checks.py script still work with these?

Sorry for a long response, I was on holiday, fixed script in https://github.com/llvm/llvm-project/pull/108972

https://github.com/llvm/llvm-project/pull/106720