[llvm] [VPlan] Handle exit phis with multiple operands in addUsersInExitBlocks. (PR #120260)

[David Sherwood via llvm-commits]

https://github.com/david-arm approved this pull request.

LGTM! I left one comment about possibly using an index instead of 0, but wouldn't hold up the patch for it.

https://github.com/llvm/llvm-project/pull/120260