dfd904d4a9
This CL makes some minor changes to the declarative builder Helpers: 1. adds lb, ub, step methods to MemRefView to avoid always having to go through std::get + range; 2. drops MemRefView& from IndexedValue which was just creating ownership concerns. Instead, an IndexedValue only needs to keep track of the ValueHandle from which a MemRefView can be constructed on-demand if necessary. PiperOrigin-RevId: 237861493