[llvm-branch-commits] [ProfCheck][Matrix] Add profile data where relevant (PR #181292)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/181292

This patch tackles two cases:
1. Checks around aliasing/overlapping ranges. This is runtime dependent
   on the pointer values passed in, which we have no way of knowing
   without additional profiling.
2. Loop backedges. For these we also have an associated trip count, so
   we set up the branch weights to represent this.

Tests updated/profcheck-xfail.txt updated.