diff --git a/clang/include/clang/AST/DeclObjC.h b/clang/include/clang/AST/DeclObjC.h
--- a/clang/include/clang/AST/DeclObjC.h
+++ b/clang/include/clang/AST/DeclObjC.h
@@ -656,20 +656,8 @@
 /// \endcode
 class ObjCTypeParamList final
     : private llvm::TrailingObjects<ObjCTypeParamList, ObjCTypeParamDecl *> {
-  /// Stores the components of a SourceRange as a POD.
-  struct PODSourceRange {
-    unsigned Begin;
-    unsigned End;
-  };
-
-  union {
-    /// Location of the left and right angle brackets.
-    PODSourceRange Brackets;
-
-    // Used only for alignment.
-    ObjCTypeParamDecl *AlignmentHack;
-  };
-
+  /// Location of the left and right angle brackets.
+  alignas(ObjCTypeParamDecl *) SourceRange Brackets;
   /// The number of parameters in the list, which are tail-allocated.
   unsigned NumParams;
 
@@ -718,15 +706,15 @@
   }
 
   SourceLocation getLAngleLoc() const {
-    return SourceLocation::getFromRawEncoding(Brackets.Begin);
+    return Brackets.getBegin();
   }
 
   SourceLocation getRAngleLoc() const {
-    return SourceLocation::getFromRawEncoding(Brackets.End);
+    return Brackets.getEnd();
   }
 
   SourceRange getSourceRange() const {
-    return SourceRange(getLAngleLoc(), getRAngleLoc());
+    return Brackets;
   }
 
   /// Gather the default set of type arguments to be substituted for
diff --git a/clang/lib/AST/DeclObjC.cpp b/clang/lib/AST/DeclObjC.cpp
--- a/clang/lib/AST/DeclObjC.cpp
+++ b/clang/lib/AST/DeclObjC.cpp
@@ -1461,9 +1461,8 @@
 ObjCTypeParamList::ObjCTypeParamList(SourceLocation lAngleLoc,
                                      ArrayRef<ObjCTypeParamDecl *> typeParams,
                                      SourceLocation rAngleLoc)
-    : NumParams(typeParams.size()) {
-  Brackets.Begin = lAngleLoc.getRawEncoding();
-  Brackets.End = rAngleLoc.getRawEncoding();
+    : Brackets(lAngleLoc, rAngleLoc),
+      NumParams(typeParams.size()) {
   std::copy(typeParams.begin(), typeParams.end(), begin());
 }