[llvm] [SimplifyCFG] Use hash map to continue hoisting the common instructions (PR #78615)

[Nikita Popov via llvm-commits]

nikic wrote:

> TBH I don't know why `GVNHoist` is disabled by default :( https://godbolt.org/z/ETGzxK1Wq

GVNHoist does conceptually seems like the right way to do this -- but at this point the pass would probably need a full re-implementation to be viable...

https://github.com/llvm/llvm-project/pull/78615