[llvm-cov] Rearrange entries in report index.

Files which don't contain any functions are likely useless; don't
include them in the main table. Put the links at the bottom of the
page, in case someone wants to figure out coverage for code inside
a macro.

Not sure if this is the best solution, but it seems like an
improvement.

Differential Revision: https://reviews.llvm.org/D36298

llvm-svn: 310518

1 files changed, 16 insertions, 2 deletions

diff --git a/llvm/tools/llvm-cov/CoverageReport.cpp b/llvm/tools/llvm-cov/CoverageReport.cpp
index 7c273a2430c..3c9bf3975b3 100644
--- a/llvm/tools/llvm-cov/CoverageReport.cpp
+++ b/llvm/tools/llvm-cov/CoverageReport.cpp
@@ -371,8 +371,22 @@ void CoverageReport::renderFileReports(raw_ostream &OS,
   renderDivider(FileReportColumns, OS);
   OS << "\n";
 
-  for (const FileCoverageSummary &FCS : FileReports)
-    render(FCS, OS);
+  bool EmptyFiles = false;
+  for (const FileCoverageSummary &FCS : FileReports) {
+    if (FCS.FunctionCoverage.NumFunctions)
+      render(FCS, OS);
+    else
+      EmptyFiles = true;
+  }
+
+  if (EmptyFiles) {
+    OS << "\n"
+       << "Files which contain no functions:\n";
+
+    for (const FileCoverageSummary &FCS : FileReports)
+      if (!FCS.FunctionCoverage.NumFunctions)
+        render(FCS, OS);
+  }
 
   renderDivider(FileReportColumns, OS);
   OS << "\n";