[llvm] [InstCombine] Fold (mul (shl X, C), Y) -> (shl (mul X, Y), C) when the shift has one use (PR #95466)

[Nikita Popov via llvm-commits]

nikic wrote:

Please do not open new pull requests until your existing ones have been either merged or closed (unless someone specifically requests you to open a new pull request, for example to split an existing pull request into multiple patches).

https://github.com/llvm/llvm-project/pull/95466