[clang] [llvm] [BasicAA] Do not decompose past casts with different index width (PR #119365)

[Nikita Popov via llvm-commits]

nikic wrote:

@frasercrmck BasicAA returns MayAlias for your example. Presumably AMDGPUAA returns NoAlias because addrspace(3) and addrspace(0) can't alias, or something like that.

https://github.com/llvm/llvm-project/pull/119365