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

[Amara Emerson via llvm-commits]

aemerson wrote:

> Some of the test are still disabled as they hit other issues.

You mean existing disabled tests, hence they're unchanged by this commit?

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