[llvm] Extend MemoryEffects to Support Target-Specific Memory Locations (PR #148650)

[Paul Walker via llvm-commits]

https://github.com/paulwalker-arm commented:

Sorry Carol, I didn't get chance to take a deeper look yet but here's some comments (mostly stylistic) that I had stashed.  I'll take a proper look on Monday.

https://github.com/llvm/llvm-project/pull/148650