That can usually be lowered efficiently and is common in sandybridge code. It would be nice to do this in DAGCombiner but we can't insert arbitrary BUILD_VECTORs this late. Fixes PR15462. llvm-svn: 176634
That can usually be lowered efficiently and is common in sandybridge code. It would be nice to do this in DAGCombiner but we can't insert arbitrary BUILD_VECTORs this late. Fixes PR15462. llvm-svn: 176634