[llvm] [CodeGen] Fix PreISelLowering not reporting changes (PR #102184)

[Alexis Engelke via llvm-commits]

aengelke wrote:

I changed that. To include expandVectorPredication in PreISelIntrinsicLowering, I needed a way to determine whether the intrinsic was removed (i.e., whether to skip one entry in the use list of the intrinsic if it was not removed). What I think we would actually need are two return values: one indicating whether the intrinsic was removed and one indicating whether the code was changed at all.

https://github.com/llvm/llvm-project/pull/102184