[llvm] CodeGenPrepare: Null check pointers (PR #142350)

[Nikita Popov via llvm-commits]

nikic wrote:

@arsenm I think this is fixing a different issue (and I guess shouldn't mark the other one as "fixes"). This is about the case where you *do* specify `-mtriple` but don't add `require<profile-summary>` to `-passes`.

https://github.com/llvm/llvm-project/pull/142350