RUN: diff -aub test_-a_-b.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a_-b.h.gcov test.h.gcov
+RUN: llvm-cov -gcno=test.gcno -gcda=test.gcda -a -b -u
+RUN: diff -aub test_-a_-b_-u.cpp.gcov test.cpp.gcov
+RUN: diff -aub test_-a_-b_-u.h.gcov test.h.gcov
+
RUN: not llvm-cov -gcno=test_read_fail.gcno -gcda=test.gcda
RUN: not llvm-cov -gcno=test.gcno -gcda=test_file_checksum_fail.gcda