Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -490,10 +490,40 @@
             PragmaLocation(PragmaLocation),
             PragmaPushLocation(PragmaPushLocation) {}
     };
-    void Act(SourceLocation PragmaLocation,
-             PragmaMsStackAction Action,
-             llvm::StringRef StackSlotLabel,
-             ValueType Value);
+    void Act(SourceLocation PragmaLocation, PragmaMsStackAction Action,
+             llvm::StringRef StackSlotLabel, ValueType Value) {
+      if (Action == PSK_Reset) {
+        CurrentValue = DefaultValue;
+        CurrentPragmaLocation = PragmaLocation;
+        return;
+      }
+      if (Action & PSK_Push)
+        Stack.emplace_back(StackSlotLabel, CurrentValue, CurrentPragmaLocation,
+                           PragmaLocation);
+      else if (Action & PSK_Pop) {
+        if (!StackSlotLabel.empty()) {
+          // If we've got a label, try to find it and jump there.
+          auto I = llvm::find_if(llvm::reverse(Stack), [&](const Slot &x) {
+            return x.StackSlotLabel == StackSlotLabel;
+          });
+          // If we found the label so pop from there.
+          if (I != Stack.rend()) {
+            CurrentValue = I->Value;
+            CurrentPragmaLocation = I->PragmaLocation;
+            Stack.erase(std::prev(I.base()), Stack.end());
+          }
+        } else if (!Stack.empty()) {
+          // We do not have a label, just pop the last entry.
+          CurrentValue = Stack.back().Value;
+          CurrentPragmaLocation = Stack.back().PragmaLocation;
+          Stack.pop_back();
+        }
+      }
+      if (Action & PSK_Set) {
+        CurrentValue = Value;
+        CurrentPragmaLocation = PragmaLocation;
+      }
+    }
 
     // MSVC seems to add artificial slots to #pragma stacks on entering a C++
     // method body to restore the stacks on exit, so it works like this:
Index: clang/lib/Sema/SemaAttr.cpp
===================================================================
--- clang/lib/Sema/SemaAttr.cpp
+++ clang/lib/Sema/SemaAttr.cpp
@@ -493,44 +493,6 @@
   VtorDispStack.Act(PragmaLoc, Action, StringRef(), Mode);
 }
 
-template<typename ValueType>
-void Sema::PragmaStack<ValueType>::Act(SourceLocation PragmaLocation,
-                                       PragmaMsStackAction Action,
-                                       llvm::StringRef StackSlotLabel,
-                                       ValueType Value) {
-  if (Action == PSK_Reset) {
-    CurrentValue = DefaultValue;
-    CurrentPragmaLocation = PragmaLocation;
-    return;
-  }
-  if (Action & PSK_Push)
-    Stack.emplace_back(StackSlotLabel, CurrentValue, CurrentPragmaLocation,
-                       PragmaLocation);
-  else if (Action & PSK_Pop) {
-    if (!StackSlotLabel.empty()) {
-      // If we've got a label, try to find it and jump there.
-      auto I = llvm::find_if(llvm::reverse(Stack), [&](const Slot &x) {
-        return x.StackSlotLabel == StackSlotLabel;
-      });
-      // If we found the label so pop from there.
-      if (I != Stack.rend()) {
-        CurrentValue = I->Value;
-        CurrentPragmaLocation = I->PragmaLocation;
-        Stack.erase(std::prev(I.base()), Stack.end());
-      }
-    } else if (!Stack.empty()) {
-      // We do not have a label, just pop the last entry.
-      CurrentValue = Stack.back().Value;
-      CurrentPragmaLocation = Stack.back().PragmaLocation;
-      Stack.pop_back();
-    }
-  }
-  if (Action & PSK_Set) {
-    CurrentValue = Value;
-    CurrentPragmaLocation = PragmaLocation;
-  }
-}
-
 bool Sema::UnifySection(StringRef SectionName,
                         int SectionFlags,
                         DeclaratorDecl *Decl) {