[llvm] [InstCombine] Remove Store when its Ptr is removable (PR #79565)

[via llvm-commits]

ParkHanbum wrote:

When the Store's Ptr is Alloca, we changed it to determine whether it can be removed by calling isAllocSiteRemovable, and added some tests. This solve the current problem.

However, there is still room for improvement, and this has been left as a comment on the issue.

https://github.com/llvm/llvm-project/pull/79565