llvm-cov: Implement --no-output
In gcov, there's a -n/--no-output option, which disables the writing
of any .gcov files, so that it emits only the summary info on stdout.
This implements the same behaviour in llvm-cov.
llvm-svn: 208148
diff --git a/llvm/test/tools/llvm-cov/llvm-cov.test b/llvm/test/tools/llvm-cov/llvm-cov.test
index 8457aef..8f57d9a 100644
--- a/llvm/test/tools/llvm-cov/llvm-cov.test
+++ b/llvm/test/tools/llvm-cov/llvm-cov.test
@@ -31,6 +31,9 @@
RUN: diff -aub test_objdir.cpp.gcov test.cpp.gcov
RUN: diff -aub test_objdir.h.gcov test.h.gcov
+# With gcov output disabled
+RUN: llvm-cov -n test.c | diff -u test_no_output.output -
+
# Preserve paths. This mangles the output filenames.
RUN: mkdir -p %t/srcdir/nested_dir
RUN: cp test.cpp test.h %t/srcdir