4aca3dc48b
This commit prevents building a G_UNMERGE_VALUES instruction with different source and destination vector elements in `LegalizationArtifactCombiner::ArtifactValueFinder::tryCombineMergeLike()`, e.g.: `%1:_(<2 x s8>), %2:_(<2 x s8>) = G_UNMERGE_VALUES %0:_(<2 x s16>)` This LLVM defect was identified via the AMD Fuzzing project.