[llvm] [VectorCombine] Fold insertelement chains of scalar parts to a bitcast and shuffle (PR #226224)

[Tim Besard via llvm-commits]

maleadt wrote:

@RKSimon Done, [old](https://github.com/maleadt/llvm-project/commit/4833d333fe92f855a4c0569ec9f397da5235375e) vs [new approach](https://github.com/maleadt/llvm-project/commit/459001730230d73e3652c5c11b3037dd03ae359c)

https://github.com/llvm/llvm-project/pull/226224