[llvm] [DAGCombine] Add all users of the instruction recursively into worklist when an instruction is simplified (PR #91772)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> This is trying to achieve the same thing as the topological dag patches (https://github.com/RKSimon/llvm-project/tree/perf/topological-dag / #77475)
> 

Question: what's the motivation of https://github.com/RKSimon/llvm-project/tree/perf/topological-dag / #77475 ? To reduce the compile time?



https://github.com/llvm/llvm-project/pull/91772