[llvm] [Attributor] Change allocation size and load/store offsets using AAPointerInfo for Alloca instructions and keep track of instructions causing an Access (PR #72029)

[Shilei Tian via llvm-commits]

https://github.com/shiltian commented:

I took another round of look. The test changes look good now, except those that don't look related to this PR. The memory allocation needs to be changed; otherwise there would be memory leak. The use of `auto` needs to be checked as well, since LLVM generally discourages to use `auto`. The cast and iterator would be fine.

https://github.com/llvm/llvm-project/pull/72029