diff --git a/clang/include/clang/Lex/PPCallbacks.h b/clang/include/clang/Lex/PPCallbacks.h
--- a/clang/include/clang/Lex/PPCallbacks.h
+++ b/clang/include/clang/Lex/PPCallbacks.h
@@ -319,6 +319,10 @@
   virtual void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) {
   }
 
+  /// Hood called when the source range is comment, which should be skipped.
+  /// \param Range The SourceRange that is comment.
+  virtual void CommentSkipped(SourceRange Range) {}
+
   enum ConditionValueKind {
     CVK_NotEvaluated, CVK_False, CVK_True
   };
@@ -565,6 +569,11 @@
     Second->SourceRangeSkipped(Range, EndifLoc);
   }
 
+  void CommentSkipped(SourceRange Range) override {
+    First->CommentSkipped(Range);
+    Second->CommentSkipped(Range);
+  }
+
   /// Hook called whenever an \#if is seen.
   void If(SourceLocation Loc, SourceRange ConditionRange,
           ConditionValueKind ConditionValue) override {
diff --git a/clang/lib/CodeGen/CoverageMappingGen.h b/clang/lib/CodeGen/CoverageMappingGen.h
--- a/clang/lib/CodeGen/CoverageMappingGen.h
+++ b/clang/lib/CodeGen/CoverageMappingGen.h
@@ -38,6 +38,8 @@
   ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
 
   void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override;
+
+  void CommentSkipped(SourceRange Range) override;
 };
 
 namespace CodeGen {
diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -39,6 +39,10 @@
   SkippedRanges.push_back(Range);
 }
 
+void CoverageSourceInfo::CommentSkipped(SourceRange Range) {
+  SkippedRanges.push_back(Range);
+}
+
 namespace {
 
 /// A region of source code that can be mapped to a counter.
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -34,6 +34,7 @@
   explicit ActionCommentHandler(Sema &S) : S(S) { }
 
   bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
+    PP.getPPCallbacks()->CommentSkipped(Comment);
     S.ActOnComment(Comment);
     return false;
   }