[llvm] InferAddressSpaces: Factor replacement loop into function [NFC] (PR #104430)

[Matt Arsenault via llvm-commits]

arsenm wrote:

### Merge activity

* **Aug 20, 11:38 AM EDT**: @arsenm started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/104430).


https://github.com/llvm/llvm-project/pull/104430