[llvm] [AArch64][BTI] Add BTI at EH entries. (PR #155308)

[Shashi Shankar via llvm-commits]

shashforge wrote:

> Nice work. Any reason to not use update_llc_test_checks.py?

Thanks! I’ve switched the tests to utils/update_llc_test_checks.py and pushed the autogenerated CHECK blocks.
I initially kept hand‑written checks to focus on the BTI‑placement invariant, but I agree full‑body checks are better for regression coverag

https://github.com/llvm/llvm-project/pull/155308