[llvm-cov] Add an option for "export" command to emit only file summary data.

Summary:
That allows to get the same data as produced by "llvm-cov report",
but in JSON format, which is better for further processing by end users.

Reviewers: vsk

Reviewed By: vsk

Differential Revision: https://reviews.llvm.org/D41085

llvm-svn: 320435

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/tools/llvm-cov/CoverageViewOptions.h b/llvm/tools/llvm-cov/CoverageViewOptions.h
index a071c0aca9e..17614c4e9ba 100644
--- a/llvm/tools/llvm-cov/CoverageViewOptions.h
+++ b/llvm/tools/llvm-cov/CoverageViewOptions.h
@@ -32,6 +32,7 @@ struct CoverageViewOptions {
   bool ShowFullFilenames;
   bool ShowRegionSummary;
   bool ShowInstantiationSummary;
+  bool ExportSummaryOnly;
   OutputFormat Format;
   std::string ShowOutputDirectory;
   std::vector<std::string> DemanglerOpts;