[llvm-branch-commits] [compiler-rt] [hwasan] Add `__hwasan_get_tag_from_pointer` (PR #75267)

[Vitaly Buka via llvm-branch-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/75267

This simplifies handling tags by user code. Now code does not need
to know bit size of tag and its position.