llvm-project

ad39049e - [DAGCombiner] Attempt to fold 'add' nodes to funnel-shift or rotate (#125612)

[DAGCombiner] Attempt to fold 'add' nodes to funnel-shift or rotate (#125612) Almost all of the rotate idioms that are valid for an 'or' are also valid when the halves are combined with an 'add'. Further, many of these cases are not handled by common bits tracking meaning that the 'add' is not converted to a 'disjoint or'.