3 files changed, 9 insertions, 8 deletions
diff --git a/llvm/lib/Demangle/Demangle.cpp b/llvm/lib/Demangle/Demangle.cpp
index 5f921537b9bd7..71dafa0b2e437 100644
--- a/llvm/lib/Demangle/Demangle.cpp
+++ b/llvm/lib/Demangle/Demangle.cpp
@@ -24,8 +24,8 @@ std::string llvm::demangle(const std::string &MangledName) {
   if (isItaniumEncoding(MangledName))
     Demangled = itaniumDemangle(MangledName.c_str(), nullptr, nullptr, nullptr);
   else
-    Demangled =
-        microsoftDemangle(MangledName.c_str(), nullptr, nullptr, nullptr);
+    Demangled = microsoftDemangle(MangledName.c_str(), nullptr, nullptr,
+                                  nullptr, nullptr);
 
   if (!Demangled)
     return MangledName;
diff --git a/llvm/lib/Demangle/ItaniumDemangle.cpp b/llvm/lib/Demangle/ItaniumDemangle.cpp
index e112d5c5ec77b..fad9b6b7b63bd 100644
--- a/llvm/lib/Demangle/ItaniumDemangle.cpp
+++ b/llvm/lib/Demangle/ItaniumDemangle.cpp
@@ -107,13 +107,11 @@ struct DumpVisitor {
   // Overload used when T is exactly 'bool', not merely convertible to 'bool'.
   void print(bool B) { printStr(B ? "true" : "false"); }
 
-  template <class T>
-  typename std::enable_if<std::is_unsigned<T>::value>::type print(T N) {
+  template <class T> std::enable_if_t<std::is_unsigned<T>::value> print(T N) {
     fprintf(stderr, "%llu", (unsigned long long)N);
   }
 
-  template <class T>
-  typename std::enable_if<std::is_signed<T>::value>::type print(T N) {
+  template <class T> std::enable_if_t<std::is_signed<T>::value> print(T N) {
     fprintf(stderr, "%lld", (long long)N);
   }
 
diff --git a/llvm/lib/Demangle/MicrosoftDemangle.cpp b/llvm/lib/Demangle/MicrosoftDemangle.cpp
index c681d6e25b879..16074314a84d2 100644
--- a/llvm/lib/Demangle/MicrosoftDemangle.cpp
+++ b/llvm/lib/Demangle/MicrosoftDemangle.cpp
@@ -2334,14 +2334,16 @@ void Demangler::dumpBackReferences() {
     std::printf("\n");
 }
 
-char *llvm::microsoftDemangle(const char *MangledName, char *Buf, size_t *N,
+char *llvm::microsoftDemangle(const char *MangledName, size_t *NMangled,
+                              char *Buf, size_t *N,
                               int *Status, MSDemangleFlags Flags) {
-  int InternalStatus = demangle_success;
   Demangler D;
   OutputStream S;
 
   StringView Name{MangledName};
   SymbolNode *AST = D.parse(Name);
+  if (!D.Error && NMangled)
+    *NMangled = Name.begin() - MangledName;
 
   if (Flags & MSDF_DumpBackrefs)
     D.dumpBackReferences();
@@ -2356,6 +2358,7 @@ char *llvm::microsoftDemangle(const char *MangledName, char *Buf, size_t *N,
   if (Flags & MSDF_NoMemberType)
     OF = OutputFlags(OF | OF_NoMemberType);
 
+  int InternalStatus = demangle_success;
   if (D.Error)
     InternalStatus = demangle_invalid_mangled_name;
   else if (!initializeOutputStream(Buf, N, S, 1024))