diff --git a/clang/lib/AST/DeclOpenMP.cpp b/clang/lib/AST/DeclOpenMP.cpp
index d5afc27..b77a67c 100644
--- a/clang/lib/AST/DeclOpenMP.cpp
+++ b/clang/lib/AST/DeclOpenMP.cpp
@@ -54,6 +54,38 @@
 }
 
 //===----------------------------------------------------------------------===//
+// OMPRequiresDecl Implementation.
+//===----------------------------------------------------------------------===//
+
+void OMPRequiresDecl::anchor() {}
+
+OMPRequiresDecl *OMPRequiresDecl::Create(ASTContext &C, DeclContext *DC,
+                                         SourceLocation L,
+                                         ArrayRef<OMPClause *> CL) {
+  OMPRequiresDecl *D =
+      new (C, DC, additionalSizeToAlloc<OMPClause *>(CL.size()))
+      OMPRequiresDecl(OMPRequires, DC, L);
+  D->NumClauses = CL.size();
+  D->setClauses(CL);
+  return D;
+}
+
+OMPRequiresDecl *OMPRequiresDecl::CreateDeserialized(ASTContext &C, unsigned ID,
+                                                     unsigned N) {
+  OMPRequiresDecl *D = new (C, ID, additionalSizeToAlloc<OMPClause *>(N))
+      OMPRequiresDecl(OMPRequires, nullptr, SourceLocation());
+  D->NumClauses = N;
+  return D;
+}
+
+void OMPRequiresDecl::setClauses(ArrayRef<OMPClause *> CL) {
+  assert(CL.size() == NumClauses &&
+         "Number of clauses is not the same as the preallocated buffer");
+  std::uninitialized_copy(CL.begin(), CL.end(),
+                          getTrailingObjects<OMPClause *>());
+}
+
+//===----------------------------------------------------------------------===//
 // OMPDeclareReductionDecl Implementation.
 //===----------------------------------------------------------------------===//