[llvm] [ARM][Thumb2] Mark BTI-clearing instructions as scheduling region boundaries (PR #79173)

[Ramkumar Ramachandra via llvm-commits]

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@@ -0,0 +1,166 @@
+# RUN: llc -o - -run-pass=machine-scheduler -misched=shuffle %s | FileCheck %s
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artagnon wrote:

In other patches that I authored, reviewers strongly suggested that I use the automatic test update scripts, even if it generates more CHECK lines than necessary. In this case, how do I know that the output doesn't diverge in the two llc invocations, within lines you didn't check? If you used `update_mir_test_checks.py`, it would automatically bail out on diverging outputs.

https://github.com/llvm/llvm-project/pull/79173