Index: llvm/lib/ProfileData/GCOV.cpp
===================================================================
--- llvm/lib/ProfileData/GCOV.cpp
+++ llvm/lib/ProfileData/GCOV.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ProfileData/GCOV.h"
+#include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Demangle/Demangle.h"
@@ -662,6 +663,8 @@
   if (f.startLine >= si.startLineToFunctions.size())
     si.startLineToFunctions.resize(f.startLine + 1);
   si.startLineToFunctions[f.startLine].push_back(&f);
+  llvm::SmallSet<uint32_t, 16> lines;
+  llvm::SmallSet<uint32_t, 16> linesExec;
   for (const GCOVBlock &b : f.blocksRange()) {
     if (b.lines.empty())
       continue;
@@ -670,9 +673,9 @@
       si.lines.resize(maxLineNum + 1);
     for (uint32_t lineNum : b.lines) {
       LineInfo &line = si.lines[lineNum];
-      if (!line.exists)
+      if (lines.insert(lineNum).second)
         ++summary.lines;
-      if (line.count == 0 && b.count)
+      if (b.count && linesExec.insert(lineNum).second)
         ++summary.linesExec;
       line.exists = true;
       line.count += b.count;
Index: llvm/test/tools/llvm-cov/gcov/tmpl.cpp
===================================================================
--- /dev/null
+++ llvm/test/tools/llvm-cov/gcov/tmpl.cpp
@@ -0,0 +1,17 @@
+// RUN: llvm-cov gcov %p/Inputs/tmpl.gcda --gcno=%p/Inputs/tmpl.gcno -f | FileCheck %s
+
+// CHECK:      Function '_Z4testILi1EEii'
+// CHECK-NEXT: Lines executed:100.00% of 2
+// CHECK:      Function '_Z4testILi2EEii'
+// CHECK-NEXT: Lines executed:100.00% of 2
+
+template <int N>
+int test(int k) {
+  return k * N;
+}
+
+int main() {
+  return test<1>(1) +
+    test<1>(2) +
+    test<2>(3);
+}