[llvm] [WebAssembly] Fix lowering of (extending) loads from addrspace(1) globals (PR #155937)

[Sam Parker via llvm-commits]

sparker-arm wrote:

This patch has been paged out of my memory... if it's fixing a correctness bug, I think that should take priority over SIMD optimisations.

https://github.com/llvm/llvm-project/pull/155937