legion: fixing composite views so that they do not prune their copy preconditions except when it is safe to do so
legion: fixing composite views so that they do not prune their copy preconditions except when it is safe to do so

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion