Merge changes from topic \'rr_barrier\' am: e835f3a am: 5cf09ba
am: 132dbf8

* commit '132dbf8841f9b3d0210efc17fb257745a1823dc3':
  Store precice set of which constructors require barriers
  Revert "Revert "Check if we require barrier if we did not resolve classes""
  Revert "Revert "Change RequiresConstructorBarrier default to yes""

Change-Id: Ic1d7a306dd05173238b39b17966f40a1bfc7f11a