[llvm] [InstCombine] Always fold nonnull assumptions into operand bundles (PR #169923)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

We're missing the optimization that converts nonnull assumes to `!nonnull` metadata on loads: https://github.com/philnik777/llvm-project/blob/f758b9c1ffc8e96ae84f039b1d757cffda0ddb23/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp#L3607-L3622

https://github.com/llvm/llvm-project/pull/169923