Backport "[Hexagon] Do not optimize address of another function's block"

[yandalur]

Backporting fix for the issue reported in #99714 to release/19.x

/cherry-pick 68df06a

[llvmbot]

@llvm/issue-subscribers-backend-hexagon

Author: None (yandalur)

Backporting fix for the issue reported in https://github.com//issues/99714 to release/19.x

/cherry-pick 68df06a

[llvmbot]

Failed to cherry-pick: 68df06a

https://github.com/llvm/llvm-project/actions/runs/10270186451

Please manually backport the fix and push it to your github fork. Once this is done, please create a pull request

[llvmbot]

Failed to cherry-pick: 68df06a

https://github.com/llvm/llvm-project/actions/runs/10270214055

Please manually backport the fix and push it to your github fork. Once this is done, please create a pull request

[yandalur]

Thanks @EugeneZelenko for adding the LLVM 19.X Release milestone!

Attempting to fix the cherry-pick command
/cherry-pick 68df06a

[llvmbot]

/pull-request #102179