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/CodeGenAction.cpp b/clang/lib/CodeGen/CodeGenAction.cpp
--- a/clang/lib/CodeGen/CodeGenAction.cpp
+++ b/clang/lib/CodeGen/CodeGenAction.cpp
@@ -990,11 +990,9 @@
 
   CoverageSourceInfo *CoverageInfo = nullptr;
   // Add the preprocessor callback only when the coverage mapping is generated.
-  if (CI.getCodeGenOpts().CoverageMapping) {
-    CoverageInfo = new CoverageSourceInfo;
-    CI.getPreprocessor().addPPCallbacks(
-                                    std::unique_ptr<PPCallbacks>(CoverageInfo));
-  }
+  if (CI.getCodeGenOpts().CoverageMapping)
+    CoverageInfo = CodeGen::CoverageMappingModuleGen::setUpCoverageCallbacks(
+        CI.getPreprocessor());
 
   std::unique_ptr<BackendConsumer> Result(new BackendConsumer(
       BA, CI.getDiagnostics(), CI.getHeaderSearchOpts(),
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
@@ -16,6 +16,7 @@
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Lex/PPCallbacks.h"
+#include "clang/Lex/Preprocessor.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/Support/raw_ostream.h"
@@ -32,12 +33,14 @@
 /// Stores additional source code information like skipped ranges which
 /// is required by the coverage mapping generator and is obtained from
 /// the preprocessor.
-class CoverageSourceInfo : public PPCallbacks {
+class CoverageSourceInfo : public PPCallbacks, public CommentHandler {
   std::vector<SourceRange> SkippedRanges;
 public:
   ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
 
   void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override;
+
+  bool HandleComment(Preprocessor &PP, SourceRange Range) override;
 };
 
 namespace CodeGen {
@@ -66,6 +69,8 @@
                                  uint64_t FilenamesRef);
 
 public:
+  static CoverageSourceInfo *setUpCoverageCallbacks(Preprocessor &PP);
+
   CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
       : CGM(CGM), SourceInfo(SourceInfo) {}
 
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
@@ -35,10 +35,23 @@
 using namespace CodeGen;
 using namespace llvm::coverage;
 
+CoverageSourceInfo *
+CoverageMappingModuleGen::setUpCoverageCallbacks(Preprocessor &PP) {
+  CoverageSourceInfo *CoverageInfo = new CoverageSourceInfo;
+  PP.addPPCallbacks(std::unique_ptr<PPCallbacks>(CoverageInfo));
+  PP.addCommentHandler(CoverageInfo);
+  return CoverageInfo;
+}
+
 void CoverageSourceInfo::SourceRangeSkipped(SourceRange Range, SourceLocation) {
   SkippedRanges.push_back(Range);
 }
 
+bool CoverageSourceInfo::HandleComment(Preprocessor &, SourceRange Range) {
+  SkippedRanges.push_back(Range);
+  return false;
+}
+
 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;
   }