[llvm] [IR] Fix assertion error in User new/delete edge case (PR #129914)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Wouldn't the proper way to fix this be to change the operator delete overloads that take an alloc marker to actually use it? https://github.com/llvm/llvm-project/blob/2e6402ca2c6c33ccf41d74383a8e3afb82489410/llvm/include/llvm/IR/User.h#L147-L183

https://github.com/llvm/llvm-project/pull/129914