[llvm] [InstCombine] Propagate invariant.load metadata across unpacked loads (PR #152186)

[Vedant Paranjape via llvm-commits]

VedantParanjape wrote:

@dtcxzyw I am not able to write a good testcase for adjustOffset PR. I tried something like this: https://godbolt.org/z/x7eYdE8EY but the code change doesn't do anything. I think the adjustOffset API doesn't support new struct path tbaa!

https://github.com/llvm/llvm-project/pull/152186