[llvm] update_test_checks: match IR basic block labels (PR #88979)

[Henrik G. Olsson via llvm-commits]

Nicolai =?utf-8?q?H=C3=A4hnle?= <nicolai.haehnle at amd.com>,
Nicolai =?utf-8?q?H=C3=A4hnle?= <nicolai.haehnle at amd.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/88979 at github.com>


https://github.com/hnrklssn approved this pull request.

Sorry for the delay, I thought I'd reviewed already! LGTM

https://github.com/llvm/llvm-project/pull/88979