[llvm-cov] Emit a summary in the report directory's index

llvm-cov writes out an index file in '-output-dir' mode, albeit not a
very informative one. Try to fix that by using the CoverageReport API to
include some basic summary information in the index file.

llvm-svn: 281011

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/tools/llvm-cov/SourceCoverageView.h b/llvm/tools/llvm-cov/SourceCoverageView.h
index 3f58937d414..b1bbff8e804 100644
--- a/llvm/tools/llvm-cov/SourceCoverageView.h
+++ b/llvm/tools/llvm-cov/SourceCoverageView.h
@@ -142,7 +142,8 @@ public:
   virtual void closeViewFile(OwnedStream OS) = 0;
 
   /// \brief Create an index which lists reports for the given source files.
-  virtual Error createIndexFile(ArrayRef<StringRef> SourceFiles) = 0;
+  virtual Error createIndexFile(ArrayRef<StringRef> SourceFiles,
+                                const coverage::CoverageMapping &Coverage) = 0;
 
   /// @}
 };