[llvm] [VectorCombine] Expand `vector_insert` into shufflevector for earlier cost optimizations (#145512) (PR #146479)

[via llvm-commits]

laurenmchin wrote:

> please can you address the CI clang-format warning

sorry about that - i thought i'd resolved this earlier. 

just a heads up, i’m looking into why the fmaddsub test is failing after my change. will ping you asap once i’ve validated the IR and confirmed whether the test needs updating

https://github.com/llvm/llvm-project/pull/146479