[llvm] Add the 'initializes' attribute langref and support (PR #84803)

[Nikita Popov via llvm-commits]

nikic wrote:

Why did this change back to storing ConstantRangeList in the Attribute rather than the efficient TrailingObjects / ArrayRef representation? If this was just because of the memory leak issue, I think an easy to solve that would have been to a) use the normal Alloc for allocation (instead of a separate SpecificBumpPtrAllocator) and b) add a vector to which all allocated pointers are added. Then in the LLVMContext dtor call the dtors of everything in the vector.

https://github.com/llvm/llvm-project/pull/84803