[llvm] [GlobalISel][AArch64] Generate ptrtoint/inttoptr as opposed to bitcast in unmerge combine. (PR #115225)

[David Green via llvm-commits]

================

----------------
davemgreen wrote:

Oh It turns out I've been here before and already added a ptradd.ll test. I'll switch to that one.

https://github.com/llvm/llvm-project/pull/115225