diff --git a/clang-tools-extra/docs/clang-tidy/checks/openmp-use-default-none.rst b/clang-tools-extra/docs/clang-tidy/checks/openmp-use-default-none.rst --- a/clang-tools-extra/docs/clang-tidy/checks/openmp-use-default-none.rst +++ b/clang-tools-extra/docs/clang-tidy/checks/openmp-use-default-none.rst @@ -51,3 +51,12 @@ // WARNING: OpenMP directive ``parallel`` specifies ``default(shared)`` // clause. Consider using ``default(none)`` clause instead. } + + // ``parallel`` directive can have ``default`` clause, and said clause is + // specified, but with ``shared`` kind, which is not ``none``, diagnose. + void p0_3() { + #pragma omp parallel default(firstprivate) + ; + // WARNING: OpenMP directive ``parallel`` specifies ``default(firstprivate)`` + // clause. Consider using ``default(none)`` clause instead. + } diff --git a/clang-tools-extra/test/clang-tidy/checkers/openmp-use-default-none.cpp b/clang-tools-extra/test/clang-tidy/checkers/openmp-use-default-none.cpp --- a/clang-tools-extra/test/clang-tidy/checkers/openmp-use-default-none.cpp +++ b/clang-tools-extra/test/clang-tidy/checkers/openmp-use-default-none.cpp @@ -42,6 +42,15 @@ // CHECK-NOTES: :[[@LINE-3]]:22: note: existing 'default' clause specified here } +// 'parallel' directive can have 'default' clause, and said clause specified, +// but with 'firstprivate' kind, which is not 'none', diagnose. +void p0_3() { +#pragma omp parallel default(firstprivate) + ; + // CHECK-NOTES: :[[@LINE-2]]:1: warning: OpenMP directive 'parallel' specifies 'default(firstprivate)' clause, consider using 'default(none)' clause instead + // CHECK-NOTES: :[[@LINE-3]]:22: note: existing 'default' clause specified here +} + // 'task' directive. // 'task' directive can have 'default' clause, but said clause is not @@ -68,6 +77,15 @@ // CHECK-NOTES: :[[@LINE-3]]:18: note: existing 'default' clause specified here } +// 'task' directive can have 'default' clause, and said clause specified, +// but with 'firstprivate' kind, which is not 'none', diagnose. +void p1_3() { +#pragma omp task default(firstprivate) + ; + // CHECK-NOTES: :[[@LINE-2]]:1: warning: OpenMP directive 'task' specifies 'default(firstprivate)' clause, consider using 'default(none)' clause instead + // CHECK-NOTES: :[[@LINE-3]]:18: note: existing 'default' clause specified here +} + // 'teams' directive. (has to be inside of 'target' directive) // 'teams' directive can have 'default' clause, but said clause is not @@ -97,6 +115,16 @@ // CHECK-NOTES: :[[@LINE-3]]:19: note: existing 'default' clause specified here } +// 'teams' directive can have 'default' clause, and said clause specified, +// but with 'firstprivate' kind, which is not 'none', diagnose. +void p2_3() { +#pragma omp target +#pragma omp teams default(firstprivate) + ; + // CHECK-NOTES: :[[@LINE-2]]:1: warning: OpenMP directive 'teams' specifies 'default(firstprivate)' clause, consider using 'default(none)' clause instead + // CHECK-NOTES: :[[@LINE-3]]:19: note: existing 'default' clause specified here +} + // 'taskloop' directive. // 'taskloop' directive can have 'default' clause, but said clause is not @@ -126,6 +154,16 @@ // CHECK-NOTES: :[[@LINE-4]]:22: note: existing 'default' clause specified here } +// 'taskloop' directive can have 'default' clause, and said clause specified, +// but with 'firstprivate' kind, which is not 'none', diagnose. +void p3_3(const int a) { +#pragma omp taskloop default(firstprivate) + for (int b = 0; b < a; b++) + ; + // CHECK-NOTES: :[[@LINE-3]]:1: warning: OpenMP directive 'taskloop' specifies 'default(firstprivate)' clause, consider using 'default(none)' clause instead + // CHECK-NOTES: :[[@LINE-4]]:22: note: existing 'default' clause specified here +} + //----------------------------------------------------------------------------// // Combined directives. // Let's not test every single possible permutation/combination of directives, @@ -158,3 +196,13 @@ // CHECK-NOTES: :[[@LINE-3]]:1: warning: OpenMP directive 'parallel for' specifies 'default(shared)' clause, consider using 'default(none)' clause instead // CHECK-NOTES: :[[@LINE-4]]:26: note: existing 'default' clause specified here } + +// 'parallel' directive can have 'default' clause, and said clause specified, +// but with 'firstprivate' kind, which is not 'none', diagnose. +void p4_3(const int a) { +#pragma omp parallel for default(firstprivate) + for (int b = 0; b < a; b++) + ; + // CHECK-NOTES: :[[@LINE-3]]:1: warning: OpenMP directive 'parallel for' specifies 'default(firstprivate)' clause, consider using 'default(none)' clause instead + // CHECK-NOTES: :[[@LINE-4]]:26: note: existing 'default' clause specified here +} diff --git a/clang/docs/LibASTMatchersReference.html b/clang/docs/LibASTMatchersReference.html --- a/clang/docs/LibASTMatchersReference.html +++ b/clang/docs/LibASTMatchersReference.html @@ -676,9 +676,10 @@ #pragma omp parallel default(none) #pragma omp parallel default(shared) + #pragma omp parallel default(firstprivate) #pragma omp parallel -``ompDefaultClause()`` matches ``default(none)`` and ``default(shared)``. +``ompDefaultClause()`` matches ``default(none)``, ``default(shared)``, and ``default(firstprivate)``. @@ -3686,6 +3687,7 @@ #pragma omp parallel #pragma omp parallel default(none) #pragma omp parallel default(shared) + #pragma omp parallel default(firstprivate) ``ompDefaultClause(isNoneKind())`` matches only ``default(none)``. @@ -3699,11 +3701,26 @@ #pragma omp parallel #pragma omp parallel default(none) #pragma omp parallel default(shared) + #pragma omp parallel default(firstprivate) ``ompDefaultClause(isSharedKind())`` matches only ``default(shared)``. +Matcher<OMPDefaultClause>isSharedKind +
Matches if the OpenMP ``default`` clause has ``firstprivate`` kind specified.
+
+Given
+
+  #pragma omp parallel
+  #pragma omp parallel default(none)
+  #pragma omp parallel default(shared)
+  #pragma omp parallel default(firstprivate)
+
+``ompDefaultClause(isFirstPrivateKind())`` matches only ``default(firstprivate)``.
+
+ + Matcher<OMPExecutableDirective>isAllowedToContainClauseKindOpenMPClauseKind CKind
Matches if the OpenMP directive is allowed to contain the specified OpenMP
 clause kind.
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -7063,10 +7063,12 @@
 /// \code
 ///   #pragma omp parallel default(none)
 ///   #pragma omp parallel default(shared)
+///   #pragma omp parallel default(firstprivate)
 ///   #pragma omp parallel
 /// \endcode
 ///
-/// ``ompDefaultClause()`` matches ``default(none)`` and ``default(shared)``.
+/// ``ompDefaultClause()`` matches ``default(none)``, ``default(shared)``, and
+/// ``default(firstprivate)``
 extern const internal::VariadicDynCastAllOfMatcher
     ompDefaultClause;
 
@@ -7078,6 +7080,7 @@
 ///   #pragma omp parallel
 ///   #pragma omp parallel default(none)
 ///   #pragma omp parallel default(shared)
+///   #pragma omp parallel default(firstprivate)
 /// \endcode
 ///
 /// ``ompDefaultClause(isNoneKind())`` matches only ``default(none)``.
@@ -7093,6 +7096,7 @@
 ///   #pragma omp parallel
 ///   #pragma omp parallel default(none)
 ///   #pragma omp parallel default(shared)
+///   #pragma omp parallel default(firstprivate)
 /// \endcode
 ///
 /// ``ompDefaultClause(isSharedKind())`` matches only ``default(shared)``.
@@ -7100,6 +7104,24 @@
   return Node.getDefaultKind() == llvm::omp::OMP_DEFAULT_shared;
 }
 
+/// Matches if the OpenMP ``default`` clause has ``firstprivate`` kind
+/// specified.
+///
+/// Given
+///
+/// \code
+///   #pragma omp parallel
+///   #pragma omp parallel default(none)
+///   #pragma omp parallel default(shared)
+///   #pragma omp parallel default(firstprivate)
+/// \endcode
+///
+/// ``ompDefaultClause(isFirstPrivateKind())`` matches only
+/// ``default(firstprivate)``.
+AST_MATCHER(OMPDefaultClause, isFirstPrivateKind) {
+  return Node.getDefaultKind() == llvm::omp::OMP_DEFAULT_firstprivate;
+}
+
 /// Matches if the OpenMP directive is allowed to contain the specified OpenMP
 /// clause kind.
 ///
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -10155,6 +10155,8 @@
   >;
 def err_omp_event_var_expected : Error<
   "expected variable of the 'omp_event_handle_t' type%select{|, not %1}0">;
+def err_omp_invalid_dsa: Error<
+  "data-sharing attribute '%0' in '%1' clause requires OpenMP version %2 or above">;
 } // end of OpenMP category
 
 let CategoryName = "Related Result Type Issue" in {
diff --git a/clang/lib/ASTMatchers/Dynamic/Registry.cpp b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
--- a/clang/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -379,6 +379,7 @@
   REGISTER_MATCHER(isExpr);
   REGISTER_MATCHER(isExternC);
   REGISTER_MATCHER(isFinal);
+  REGISTER_MATCHER(isFirstPrivateKind);
   REGISTER_MATCHER(isImplicit);
   REGISTER_MATCHER(isInStdNamespace);
   REGISTER_MATCHER(isInTemplateInstantiation);
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -1391,7 +1391,7 @@
 /// Parsing of simple OpenMP clauses like 'default' or 'proc_bind'.
 ///
 ///    default-clause:
-///         'default' '(' 'none' | 'shared' ')
+///         'default' '(' 'none' | 'shared'  | 'firstprivate' ')
 ///
 ///    proc_bind-clause:
 ///         'proc_bind' '(' 'master' | 'close' | 'spread' ')
@@ -2615,7 +2615,7 @@
 /// Parsing of simple OpenMP clauses like 'default' or 'proc_bind'.
 ///
 ///    default-clause:
-///         'default' '(' 'none' | 'shared' ')'
+///         'default' '(' 'none' | 'shared' | 'firstprivate' ')'
 ///
 ///    proc_bind-clause:
 ///         'proc_bind' '(' 'master' | 'close' | 'spread' ')'
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -50,9 +50,10 @@
 namespace {
 /// Default data sharing attributes, which can be applied to directive.
 enum DefaultDataSharingAttributes {
-  DSA_unspecified = 0, /// Data sharing attribute not specified.
-  DSA_none = 1 << 0,   /// Default data sharing attribute 'none'.
-  DSA_shared = 1 << 1, /// Default data sharing attribute 'shared'.
+  DSA_unspecified = 0,       /// Data sharing attribute not specified.
+  DSA_none = 1 << 0,         /// Default data sharing attribute 'none'.
+  DSA_shared = 1 << 1,       /// Default data sharing attribute 'shared'.
+  DSA_firstprivate = 1 << 2, /// Default data sharing attribute 'firstprivate'.
 };
 
 /// Stack for tracking declarations used in OpenMP directives and
@@ -642,6 +643,11 @@
     getTopOfStack().DefaultAttr = DSA_shared;
     getTopOfStack().DefaultAttrLoc = Loc;
   }
+  /// Set default data sharing attribute to firstprivate.
+  void setDefaultDSAFirstPrivate(SourceLocation Loc) {
+    getTopOfStack().DefaultAttr = DSA_firstprivate;
+    getTopOfStack().DefaultAttrLoc = Loc;
+  }
   /// Set default data mapping attribute to Modifier:Kind
   void setDefaultDMAAttr(OpenMPDefaultmapClauseModifier M,
                          OpenMPDefaultmapClauseKind Kind,
@@ -1093,6 +1099,11 @@
     return DVar;
   case DSA_none:
     return DVar;
+  case DSA_firstprivate:
+    DVar.RefExpr = nullptr;
+    DVar.CKind = OMPC_firstprivate;
+    DVar.PrivateCopy = nullptr;
+    return DVar;
   case DSA_unspecified:
     // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
     // in a Construct, implicitly determined, p.2]
@@ -3181,6 +3192,26 @@
         return;
       }
 
+      // The default(firstprivate) clause requires that each variable that has
+      // static storage duration and is of global or namespace scope must have 
+      // its data-sharing attribute explicitly determined by being listed in a
+      // data-sharing attribute clause.
+      VarDecl *CanonicalVD = VD->getCanonicalDecl();
+      if (Stack->getDefaultDSA() == DSA_firstprivate &&
+          VD->getStorageClass() == SC_Static &&
+          (CanonicalVD->getDeclContext()->isNamespace() ||
+           !VD->isLocalVarDeclOrParm())) {
+        VarsWithInheritedDSA[VD] = E;
+        return;
+      }
+
+      // Create implicit firstprivate variables as necessary under
+      // default(firstprivate).
+      if (Stack->getDefaultDSA() == DSA_firstprivate) {
+        ImplicitFirstprivate.emplace_back(E);
+        return;
+      }
+
       // OpenMP 5.0 [2.19.7.2, defaultmap clause, Description]
       // If implicit-behavior is none, each variable referenced in the
       // construct that does not have a predetermined data-sharing attribute
@@ -5116,8 +5147,10 @@
 
   ErrorFound = Res.isInvalid() || ErrorFound;
 
-  // Check variables in the clauses if default(none) was specified.
-  if (DSAStack->getDefaultDSA() == DSA_none) {
+  // Check variables in the clauses if default(none) or
+  // default(firstprivate) was specified.
+  if (DSAStack->getDefaultDSA() == DSA_none ||
+      DSAStack->getDefaultDSA() == DSA_firstprivate) {
     DSAAttrChecker DSAChecker(DSAStack, *this, nullptr);
     for (OMPClause *C : Clauses) {
       switch (C->getClauseKind()) {
@@ -5223,7 +5256,8 @@
     if (P.getFirst()->isImplicit() || isa(P.getFirst()))
       continue;
     ErrorFound = true;
-    if (DSAStack->getDefaultDSA() == DSA_none) {
+    if (DSAStack->getDefaultDSA() == DSA_none ||
+        DSAStack->getDefaultDSA() == DSA_firstprivate) {
       Diag(P.second->getExprLoc(), diag::err_omp_no_dsa_for_variable)
           << P.first << P.second->getSourceRange();
       Diag(DSAStack->getDefaultDSALocation(), diag::note_omp_default_dsa_none);
@@ -12355,6 +12389,7 @@
   case OMPC_inclusive:
     llvm_unreachable("Clause is not allowed.");
   }
+
   return Res;
 }
 
@@ -12391,10 +12426,20 @@
         << getOpenMPClauseName(OMPC_default);
     return nullptr;
   }
+
+  if (getLangOpts().OpenMP < 51 && Kind == OMP_DEFAULT_firstprivate) {
+    Diag(StartLoc, diag::err_omp_invalid_dsa)
+        << getOpenMPClauseName(OMPC_firstprivate)
+        << getOpenMPClauseName(OMPC_default)
+        << "5.1";
+  }
+
   if (Kind == OMP_DEFAULT_none)
     DSAStack->setDefaultDSANone(KindKwLoc);
   else if (Kind == OMP_DEFAULT_shared)
     DSAStack->setDefaultDSAShared(KindKwLoc);
+  else if (Kind == OMP_DEFAULT_firstprivate)
+    DSAStack->setDefaultDSAFirstPrivate(KindKwLoc);
 
   return new (Context)
       OMPDefaultClause(Kind, KindKwLoc, StartLoc, LParenLoc, EndLoc);
diff --git a/clang/test/OpenMP/distribute_parallel_for_default_messages.cpp b/clang/test/OpenMP/distribute_parallel_for_default_messages.cpp
--- a/clang/test/OpenMP/distribute_parallel_for_default_messages.cpp
+++ b/clang/test/OpenMP/distribute_parallel_for_default_messages.cpp
@@ -2,8 +2,15 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 template 
 T tmain(T argc) {
   int i;
@@ -14,12 +21,12 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp distribute parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -34,7 +41,7 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -62,12 +69,12 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp distribute parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -82,7 +89,7 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -98,5 +105,17 @@
   for (i = 0; i < argc; ++i) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
     foo();
 
+#pragma omp target
+#pragma omp teams
+#ifndef OMP51
+#pragma omp distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (i = 0; i < argc; ++i) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return (tmain(argc) + tmain(argv[0][0])); // expected-note {{in instantiation of function template specialization 'tmain' requested here}} expected-note {{in instantiation of function template specialization 'tmain' requested here}}
 }
diff --git a/clang/test/OpenMP/distribute_parallel_for_simd_default_messages.cpp b/clang/test/OpenMP/distribute_parallel_for_simd_default_messages.cpp
--- a/clang/test/OpenMP/distribute_parallel_for_simd_default_messages.cpp
+++ b/clang/test/OpenMP/distribute_parallel_for_simd_default_messages.cpp
@@ -14,12 +14,12 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp distribute parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -34,7 +34,7 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -62,12 +62,12 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp distribute parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
@@ -82,7 +82,7 @@
     foo();
 #pragma omp target
 #pragma omp teams
-#pragma omp distribute parallel for simd default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp distribute parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target
diff --git a/clang/test/OpenMP/driver.c b/clang/test/OpenMP/driver.c
--- a/clang/test/OpenMP/driver.c
+++ b/clang/test/OpenMP/driver.c
@@ -47,6 +47,7 @@
 // RUN: %clang %s -c -E -dM -fopenmp-simd -fopenmp-version=31 | FileCheck --check-prefix=CHECK-VERSION %s
 // RUN: %clang %s -c -E -dM -fopenmp-simd -fopenmp-version=40 | FileCheck --check-prefix=CHECK-VERSION %s
 // RUN: %clang %s -c -E -dM -fopenmp-simd -fopenmp-version=45 | FileCheck --check-prefix=CHECK-VERSION %s
+// RUN: %clang %s -c -E -dM -fopenmp-simd -fopenmp-version=51 | FileCheck --check-prefix=CHECK-VERSION %s
 
 // CHECK-VERSION-NOT: #define _OPENMP
 
diff --git a/clang/test/OpenMP/parallel_default_messages.cpp b/clang/test/OpenMP/parallel_default_messages.cpp
--- a/clang/test/OpenMP/parallel_default_messages.cpp
+++ b/clang/test/OpenMP/parallel_default_messages.cpp
@@ -4,18 +4,24 @@
 // RUN: %clang_cc1 -verify=expected,ge40 -fopenmp-version=40 -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
 // RUN: %clang_cc1 -verify -fopenmp-version=31 -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
 // RUN: %clang_cc1 -verify -fopenmp-version=30 -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
+// RUN: %clang_cc1 -verify=expected,ge40 -fopenmp-version=51 -fopenmp -DOMP51 -ferror-limit 100 -o - %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   const int c = 0;
 
   #pragma omp parallel default // expected-error {{expected '(' after 'default'}}
-  #pragma omp parallel default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp parallel default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
-  #pragma omp parallel default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp parallel default (shared), default(shared) // expected-error {{directive '#pragma omp parallel' cannot contain more than one 'default' clause}}
-  #pragma omp parallel default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel default(  // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
+#pragma omp parallel default(none                     // expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel default(shared), default(shared) // expected-error {{directive '#pragma omp parallel' cannot contain more than one 'default' clause}}
+#pragma omp parallel default(x)                       // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 
   #pragma omp parallel default(none) // expected-note {{explicit data sharing attribute requested here}}
@@ -27,5 +33,16 @@
 
   #pragma omp parallel default(none) // ge40-note {{explicit data sharing attribute requested here}}
   (void)c; // ge40-error {{variable 'c' must have explicitly specified data sharing attributes}}
+
+#ifndef OMP51
+#pragma omp parallel default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp parallel default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  {
+    ++x;                                     // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y;                                     // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/parallel_for_default_messages.cpp b/clang/test/OpenMP/parallel_for_default_messages.cpp
--- a/clang/test/OpenMP/parallel_for_default_messages.cpp
+++ b/clang/test/OpenMP/parallel_for_default_messages.cpp
@@ -1,18 +1,24 @@
 // RUN: %clang_cc1 -verify -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=51 -DOMP51 -ferror-limit 100 -o - %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   int i;
 #pragma omp parallel for default // expected-error {{expected '(' after 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp parallel for default(none // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{explicit data sharing attribute requested here}}
@@ -21,7 +27,7 @@
 #pragma omp parallel for default(shared), default(shared) // expected-error {{directive '#pragma omp parallel for' cannot contain more than one 'default' clause}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 
@@ -34,5 +40,15 @@
   for (i = 0; i < argc; ++i) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
     foo();
 
+#ifndef OMP51
+#pragma omp parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (i = 0; i < argc; ++i) {
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/parallel_for_simd_default_messages.cpp b/clang/test/OpenMP/parallel_for_simd_default_messages.cpp
--- a/clang/test/OpenMP/parallel_for_simd_default_messages.cpp
+++ b/clang/test/OpenMP/parallel_for_simd_default_messages.cpp
@@ -2,17 +2,24 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   int i;
 #pragma omp parallel for simd default // expected-error {{expected '(' after 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for simd default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for simd default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp parallel for simd default(none // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{explicit data sharing attribute requested here}}
@@ -21,7 +28,7 @@
 #pragma omp parallel for simd default(shared), default(shared) // expected-error {{directive '#pragma omp parallel for simd' cannot contain more than one 'default' clause}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp parallel for simd default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 
@@ -34,5 +41,15 @@
   for (i = 0; i < argc; ++i) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}} expected-error {{variable 'i' must have explicitly specified data sharing attributes}}
     foo();
 
+#ifndef OMP51
+#pragma omp task default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp task default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (i = 0; i < argc; ++i) {
+    x++; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    y++; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/parallel_master_codegen.cpp b/clang/test/OpenMP/parallel_master_codegen.cpp
--- a/clang/test/OpenMP/parallel_master_codegen.cpp
+++ b/clang/test/OpenMP/parallel_master_codegen.cpp
@@ -118,6 +118,49 @@
 
 #endif
 
+#ifdef CK31
+///==========================================================================///
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -verify -fopenmp -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s --check-prefix CK31
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -fopenmp -x c++ -std=c++11 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -fopenmp -x c++ -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck %s --check-prefix CK31
+
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -verify -fopenmp-simd -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -fopenmp-simd -x c++ -std=c++11 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
+// RUN: %clang_cc1 -DCK31 -fopenmp-version=51 -fopenmp-simd -x c++ -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// SIMD-ONLY0-NOT: {{__kmpc|__tgt}}
+
+// CK31-DAG:   %struct.ident_t = type { i32, i32, i32, i32, i8* }
+// CK31-DAG:   [[STR:@.+]] = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00"
+
+void parallel_master_private() {
+  int a;
+#pragma omp parallel master default(firstprivate)
+  a++;
+}
+
+// CK31-LABEL: define void @{{.+}}parallel_master{{.+}}
+// CK31:       [[A_VAL:%.+]] = alloca i32
+// CK31:       call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%struct.ident_t* {{.+}}, i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, i32*)* [[OMP_OUTLINED:@.+]] to void
+
+// CK31:       define internal {{.*}}void [[OMP_OUTLINED]](i32* noalias [[GTID:%.+]], i32* noalias [[BTID:%.+]], i32* dereferenceable(4) [[A_VAL]])
+// CK31:       [[GTID_ADDR:%.+]] = alloca i32*
+// CK31:       [[BTID_ADDR:%.+]] = alloca i32*
+// CK31:       [[A_ADDR:%.+]] = alloca i32*
+// CK31:       [[A_VAL]]1 = alloca i32, align 4
+// CK31:       store i32* [[GTID]], i32** [[GTID_ADDR]]
+// CK31:       store i32* [[BTID]], i32** [[BTID_ADDR]]
+// CK31:       store i32* [[A_VAL]], i32** [[A_ADDR]]
+// CK31:       [[ZERO:%.+]] = load i32*, i32** [[A_ADDR]]
+// CK31:       [[ONE:%.+]] = load i32, i32* [[ZERO:%.+]]
+// CK31:       store i32 [[ONE:%.+]], i32* [[A_VAL]]1
+// CK31:       [[TWO:%.+]] = load i32*, i32** [[GTID_ADDR:%.+]]
+// CK31:       [[THREE:%.+]] = load i32, i32* [[TWO:%.+]]
+// CK31:       [[FOUR:%.+]] = call i32 @__kmpc_master(%struct.ident_t* @0, i32 [[THREE:%.+]])
+// CK31:       [[FIVE:%.+]] = icmp ne i32 [[FOUR:%.+]], 0
+// CK31:       br i1 [[FIVE:%.+]], label [[OMP_IF_THEN:%.+]], label [[OMP_IF_END:%.+]]
+
+#endif
+
 #ifdef CK4
 ///==========================================================================///
 // RUN: %clang_cc1 -DCK4 -verify -fopenmp -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s --check-prefix CK4
diff --git a/clang/test/OpenMP/parallel_master_default_messages.cpp b/clang/test/OpenMP/parallel_master_default_messages.cpp
--- a/clang/test/OpenMP/parallel_master_default_messages.cpp
+++ b/clang/test/OpenMP/parallel_master_default_messages.cpp
@@ -2,20 +2,27 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
 #pragma omp parallel master default // expected-error {{expected '(' after 'default'}}
   {
-#pragma omp parallel master default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel master default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     {
-#pragma omp parallel master default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel master default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
       {
 #pragma omp parallel master default(none // expected-error {{expected ')'}} expected-note {{to match this '('}}
         {
 #pragma omp parallel master default(shared), default(shared) // expected-error {{directive '#pragma omp parallel master' cannot contain more than one 'default' clause}}
           {
-#pragma omp parallel master default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel master default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
             {
               foo();
             }
@@ -37,5 +44,16 @@
       ++argc;  // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
     }
   }
+
+#ifndef OMP51
+#pragma omp parallel master default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp parallel master default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  {
+    ++x;                                            // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y;                                            // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/parallel_sections_default_messages.cpp b/clang/test/OpenMP/parallel_sections_default_messages.cpp
--- a/clang/test/OpenMP/parallel_sections_default_messages.cpp
+++ b/clang/test/OpenMP/parallel_sections_default_messages.cpp
@@ -7,15 +7,15 @@
 int main(int argc, char **argv) {
 #pragma omp parallel sections default // expected-error {{expected '(' after 'default'}}
   {
-#pragma omp parallel sections default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp parallel sections default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
     {
-#pragma omp parallel sections default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel sections default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
       {
 #pragma omp parallel sections default(none // expected-error {{expected ')'}} expected-note {{to match this '('}}
         {
 #pragma omp parallel sections default(shared), default(shared) // expected-error {{directive '#pragma omp parallel sections' cannot contain more than one 'default' clause}}
           {
-#pragma omp parallel sections default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp parallel sections default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
             {
               foo();
             }
diff --git a/clang/test/OpenMP/target_parallel_default_messages.cpp b/clang/test/OpenMP/target_parallel_default_messages.cpp
--- a/clang/test/OpenMP/target_parallel_default_messages.cpp
+++ b/clang/test/OpenMP/target_parallel_default_messages.cpp
@@ -2,20 +2,27 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target parallel default // expected-error {{expected '(' after 'default'}}
   foo();
-  #pragma omp target parallel default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target parallel default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   foo();
-  #pragma omp target parallel default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
   #pragma omp target parallel default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
   foo();
   #pragma omp target parallel default (shared), default(shared) // expected-error {{directive '#pragma omp target parallel' cannot contain more than one 'default' clause}}
   foo();
-  #pragma omp target parallel default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 
   #pragma omp target parallel default(none) // expected-note {{explicit data sharing attribute requested here}}
@@ -28,5 +35,16 @@
   #pragma omp target parallel default(none) // expected-note {{explicit data sharing attribute requested here}}
   #pragma omp parallel default(shared)
   ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+
+#ifndef OMP51
+#pragma omp target parallel default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp target parallel default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+{
+  ++x;                                            // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+  ++y;                                            // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+}
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_parallel_for_default_messages.cpp b/clang/test/OpenMP/target_parallel_for_default_messages.cpp
--- a/clang/test/OpenMP/target_parallel_for_default_messages.cpp
+++ b/clang/test/OpenMP/target_parallel_for_default_messages.cpp
@@ -1,18 +1,24 @@
 // RUN: %clang_cc1 -verify -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=51 -DOMP51 -ferror-limit 100 -o - %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   int i;
 #pragma omp target parallel for default // expected-error {{expected '(' after 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target parallel for default(none // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{explicit data sharing attribute requested here}}
@@ -21,7 +27,7 @@
 #pragma omp target parallel for default(shared), default(shared) // expected-error {{directive '#pragma omp target parallel for' cannot contain more than one 'default' clause}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 
@@ -34,5 +40,15 @@
   for (i = 0; i < argc; ++i) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
     foo();
 
+#ifndef OMP51
+#pragma omp target parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else 
+#pragma omp target parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (i = 0; i < argc; ++i) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_parallel_for_simd_default_messages.cpp b/clang/test/OpenMP/target_parallel_for_simd_default_messages.cpp
--- a/clang/test/OpenMP/target_parallel_for_simd_default_messages.cpp
+++ b/clang/test/OpenMP/target_parallel_for_simd_default_messages.cpp
@@ -1,18 +1,24 @@
 // RUN: %clang_cc1 -verify -fopenmp -ferror-limit 100 -o - %s -Wuninitialized
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   int i;
 #pragma omp target parallel for simd default // expected-error {{expected '(' after 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for simd default( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for simd default() // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 #pragma omp target parallel for simd default(none // expected-error {{expected ')'}} expected-note {{to match this '('}} expected-note {{explicit data sharing attribute requested here}}
@@ -21,7 +27,7 @@
 #pragma omp target parallel for simd default(shared), default(shared) // expected-error {{directive '#pragma omp target parallel for simd' cannot contain more than one 'default' clause}}
   for (i = 0; i < argc; ++i)
     foo();
-#pragma omp target parallel for simd default(x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (i = 0; i < argc; ++i)
     foo();
 
@@ -34,5 +40,15 @@
   for (i = 0; i < argc; ++i) // expected-error {{variable 'i' must have explicitly specified data sharing attributes}} expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
     foo();
 
+#ifndef OMP51
+#pragma omp target parallel for simd default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}} 
+#else
+#pragma omp target parallel for simd default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < argc; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_teams_default_messages.cpp b/clang/test/OpenMP/target_teams_default_messages.cpp
--- a/clang/test/OpenMP/target_teams_default_messages.cpp
+++ b/clang/test/OpenMP/target_teams_default_messages.cpp
@@ -1,21 +1,27 @@
 // RUN: %clang_cc1 -verify -fopenmp -o - %s -Wuninitialized
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -o - %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -o - %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
 #pragma omp target teams default // expected-error {{expected '(' after 'default'}}
   foo();
-#pragma omp target teams default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target teams default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   foo();
-#pragma omp target teams default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 #pragma omp target teams default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
   foo();
 #pragma omp target teams default (shared), default(shared) // expected-error {{directive '#pragma omp target teams' cannot contain more than one 'default' clause}}
   foo();
-#pragma omp target teams default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 
 #pragma omp target teams default(none) // expected-note {{explicit data sharing attribute requested here}}
@@ -24,5 +30,16 @@
 #pragma omp target teams default(none) // expected-note {{explicit data sharing attribute requested here}}
 #pragma omp parallel default(shared)
   ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+
+#ifndef OMP51
+#pragma omp target teams default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp target teams default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  {
+  ++x;                                         // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+  ++y;                                         // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_teams_distribute_default_messages.cpp b/clang/test/OpenMP/target_teams_distribute_default_messages.cpp
--- a/clang/test/OpenMP/target_teams_distribute_default_messages.cpp
+++ b/clang/test/OpenMP/target_teams_distribute_default_messages.cpp
@@ -1,25 +1,41 @@
 // RUN: %clang_cc1 -verify -fopenmp %s -Wuninitialized
 
 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=51 -DOMP51 %s -Wuninitialized
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target teams distribute default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
-  #pragma omp target teams distribute default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target teams distribute default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
-  #pragma omp target teams distribute default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target teams distribute default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target teams distribute default (shared), default(shared) // expected-error {{directive '#pragma omp target teams distribute' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
-  #pragma omp target teams distribute default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
   #pragma omp target teams distribute default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#ifndef OMP51
+#pragma omp target teams distribute default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp target teams distribute default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < 200; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_teams_distribute_parallel_for_default_messages.cpp b/clang/test/OpenMP/target_teams_distribute_parallel_for_default_messages.cpp
--- a/clang/test/OpenMP/target_teams_distribute_parallel_for_default_messages.cpp
+++ b/clang/test/OpenMP/target_teams_distribute_parallel_for_default_messages.cpp
@@ -2,24 +2,41 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
 #pragma omp target teams distribute parallel for default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
- #pragma omp target teams distribute parallel for default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target teams distribute parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
-#pragma omp target teams distribute parallel for default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 #pragma omp target teams distribute parallel for default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
 #pragma omp target teams distribute parallel for default (shared), default(shared) // expected-error {{directive '#pragma omp target teams distribute parallel for' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
-#pragma omp target teams distribute parallel for default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
 #pragma omp target teams distribute parallel for default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#ifndef OMP51
+#pragma omp target teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp target teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < 200; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/target_teams_distribute_parallel_for_simd_default_messages.cpp b/clang/test/OpenMP/target_teams_distribute_parallel_for_simd_default_messages.cpp
--- a/clang/test/OpenMP/target_teams_distribute_parallel_for_simd_default_messages.cpp
+++ b/clang/test/OpenMP/target_teams_distribute_parallel_for_simd_default_messages.cpp
@@ -2,16 +2,23 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
 #pragma omp target teams distribute parallel for simd default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
 
-#pragma omp target teams distribute parallel for simd default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp target teams distribute parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
 
-#pragma omp target teams distribute parallel for simd default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
 #pragma omp target teams distribute parallel for simd default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -20,11 +27,21 @@
 #pragma omp target teams distribute parallel for simd default (shared), default(shared) // expected-error {{directive '#pragma omp target teams distribute parallel for simd' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
 
-#pragma omp target teams distribute parallel for simd default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp target teams distribute parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
 #pragma omp target teams distribute parallel for simd default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#ifndef OMP51
+#pragma omp target teams distribute parallel for simd default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp target teams distribute parallel for simd default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < argc; ++i) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/task_default_messages.cpp b/clang/test/OpenMP/task_default_messages.cpp
--- a/clang/test/OpenMP/task_default_messages.cpp
+++ b/clang/test/OpenMP/task_default_messages.cpp
@@ -2,15 +2,22 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
 #pragma omp task default                          // expected-error {{expected '(' after 'default'}}
-#pragma omp task default(                         // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
-#pragma omp task default()                        // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp task default(                         // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp task default()                        // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
 #pragma omp task default(none                     // expected-error {{expected ')'}} expected-note {{to match this '('}}
 #pragma omp task default(shared), default(shared) // expected-error {{directive '#pragma omp task' cannot contain more than one 'default' clause}}
-#pragma omp task default(x)                       // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp task default(x)                       // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 
 #pragma omp task default(none) // expected-note {{explicit data sharing attribute requested here}}
@@ -19,5 +26,15 @@
 #pragma omp task default(none) // expected-note {{explicit data sharing attribute requested here}}
 #pragma omp task default(shared)
   ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+
+#ifndef OMP51
+#pragma omp task default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp task default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  {
+  ++x;                                 // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+  ++y;                                 // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
   return 0;
 }
diff --git a/clang/test/OpenMP/task_messages.cpp b/clang/test/OpenMP/task_messages.cpp
--- a/clang/test/OpenMP/task_messages.cpp
+++ b/clang/test/OpenMP/task_messages.cpp
@@ -4,6 +4,8 @@
 // RUN: %clang_cc1 -verify=expected,omp45 -fopenmp-version=45 -fopenmp-simd -ferror-limit 200 -std=c++11 -o - %s -Wuninitialized
 // RUN: %clang_cc1 -verify=expected,omp50 -fopenmp-version=50 -fopenmp-simd -ferror-limit 200 -std=c++11 -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -ferror-limit 100 -std=c++11 -o - %s -Wuninitialized
+
 void xxx(int argc) {
   int x; // expected-note {{initialize the variable 'x' to silence this warning}}
 #pragma omp task
@@ -16,6 +18,10 @@
 }
 
 typedef unsigned long omp_event_handle_t;
+namespace {
+static int y = 0;
+}
+static int x = 0;
 
 #pragma omp task // expected-error {{unexpected OpenMP directive '#pragma omp task'}}
 
@@ -53,6 +59,17 @@
 #pragma omp task default(none) // expected-note 2 {{explicit data sharing attribute requested here}}
 #pragma omp task default(shared)
   ++a; // expected-error 2 {{variable 'a' must have explicitly specified data sharing attributes}}
+#ifndef OMP51
+#pragma omp task default(firstprivate) // expected-note 4 {{explicit data sharing attribute requested here}} expected-error 3 {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp task default(firstprivate) // expected-note 4 {{explicit data sharing attribute requested here}}
+#endif
+#pragma omp task
+{
+  ++x;                                 // expected-error 2 {{variable 'x' must have explicitly specified data sharing attributes}}
+  ++y;                         // expected-error 2 {{variable 'y' must have explicitly specified data sharing attributes}}
+}
+
 #pragma omp task default(none) // expected-note 2 {{explicit data sharing attribute requested here}}
 #pragma omp task
   // expected-error@+1 {{calling a private constructor of class 'S'}}
diff --git a/clang/test/OpenMP/teams_default_messages.cpp b/clang/test/OpenMP/teams_default_messages.cpp
--- a/clang/test/OpenMP/teams_default_messages.cpp
+++ b/clang/test/OpenMP/teams_default_messages.cpp
@@ -2,17 +2,24 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd -o - %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd -o - %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target
   #pragma omp teams default // expected-error {{expected '(' after 'default'}}
   foo();
   #pragma omp target
-  #pragma omp teams default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp teams default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   foo();
   #pragma omp target
-  #pragma omp teams default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
   #pragma omp target
   #pragma omp teams default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -21,7 +28,7 @@
   #pragma omp teams default (shared), default(shared) // expected-error {{directive '#pragma omp teams' cannot contain more than one 'default' clause}}
   foo();
   #pragma omp target
-  #pragma omp teams default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   foo();
 
   #pragma omp target
@@ -32,5 +39,16 @@
   #pragma omp teams default(none) // expected-note {{explicit data sharing attribute requested here}}
   #pragma omp parallel default(shared)
   ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+
+#pragma omp target
+#ifndef OMP51
+#pragma omp teams default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp teams default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+{
+  ++x;                                  // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+  ++y;                                  // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+}
   return 0;
 }
diff --git a/clang/test/OpenMP/teams_distribute_default_messages.cpp b/clang/test/OpenMP/teams_distribute_default_messages.cpp
--- a/clang/test/OpenMP/teams_distribute_default_messages.cpp
+++ b/clang/test/OpenMP/teams_distribute_default_messages.cpp
@@ -2,17 +2,24 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target
   #pragma omp teams distribute default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp teams distribute default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
   #pragma omp teams distribute default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -21,12 +28,23 @@
   #pragma omp teams distribute default (shared), default(shared) // expected-error {{directive '#pragma omp teams distribute' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
   #pragma omp target
   #pragma omp teams distribute default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#pragma omp target
+#ifndef OMP51
+#pragma omp teams distribute default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp teams distribute default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < 200; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/teams_distribute_parallel_for_default_messages.cpp b/clang/test/OpenMP/teams_distribute_parallel_for_default_messages.cpp
--- a/clang/test/OpenMP/teams_distribute_parallel_for_default_messages.cpp
+++ b/clang/test/OpenMP/teams_distribute_parallel_for_default_messages.cpp
@@ -2,17 +2,24 @@
 
 // RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
 
+// RUN: %clang_cc1 -verify -fopenmp-version=51 -DOMP51 -fopenmp-simd %s -Wuninitialized
+
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target
   #pragma omp teams distribute parallel for default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp teams distribute parallel for default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute parallel for default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
   #pragma omp teams distribute parallel for default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -21,12 +28,23 @@
   #pragma omp teams distribute parallel for default (shared), default(shared) // expected-error {{directive '#pragma omp teams distribute parallel for' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute parallel for default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
   #pragma omp target
   #pragma omp teams distribute parallel for default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#pragma omp target
+#ifndef OMP51
+#pragma omp teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} 
+#endif
+  for (int i = 0; i < 200; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/teams_distribute_parallel_for_simd_default_messages.cpp b/clang/test/OpenMP/teams_distribute_parallel_for_simd_default_messages.cpp
--- a/clang/test/OpenMP/teams_distribute_parallel_for_simd_default_messages.cpp
+++ b/clang/test/OpenMP/teams_distribute_parallel_for_simd_default_messages.cpp
@@ -4,15 +4,20 @@
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target
   #pragma omp teams distribute parallel for simd default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for simd default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp teams distribute parallel for simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for simd default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute parallel for simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
   #pragma omp teams distribute parallel for simd default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -21,12 +26,23 @@
   #pragma omp teams distribute parallel for simd default (shared), default(shared) // expected-error {{directive '#pragma omp teams distribute parallel for simd' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute parallel for simd default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute parallel for simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
   #pragma omp target
   #pragma omp teams distribute parallel for simd default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#pragma omp target
+#ifndef OMP51
+#pragma omp teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}} expected-error {{data-sharing attribute 'firstprivate' in 'default' clause requires OpenMP version 5.1 or above}}
+#else
+#pragma omp teams distribute parallel for default(firstprivate) // expected-note 2 {{explicit data sharing attribute requested here}}
+#endif
+  for (int i = 0; i < 200; i++) {
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+  }
+
   return 0;
 }
diff --git a/clang/test/OpenMP/teams_distribute_simd_default_messages.cpp b/clang/test/OpenMP/teams_distribute_simd_default_messages.cpp
--- a/clang/test/OpenMP/teams_distribute_simd_default_messages.cpp
+++ b/clang/test/OpenMP/teams_distribute_simd_default_messages.cpp
@@ -1,18 +1,23 @@
-// RUN: %clang_cc1 -verify -fopenmp %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp %s -Wuninitialized -fopenmp-version=51
 
-// RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized
+// RUN: %clang_cc1 -verify -fopenmp-simd %s -Wuninitialized -fopenmp-version=51
 
 void foo();
 
+namespace {
+static int y = 0;
+}
+static int x = 0;
+
 int main(int argc, char **argv) {
   #pragma omp target
   #pragma omp teams distribute simd default // expected-error {{expected '(' after 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute simd default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+#pragma omp teams distribute simd default( // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute simd default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute simd default() // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
   #pragma omp teams distribute simd default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
@@ -21,12 +26,22 @@
   #pragma omp teams distribute simd default (shared), default(shared) // expected-error {{directive '#pragma omp teams distribute simd' cannot contain more than one 'default' clause}}
   for (int i=0; i<200; i++) foo();
   #pragma omp target
-  #pragma omp teams distribute simd default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+#pragma omp teams distribute simd default(x) // expected-error {{expected 'none', 'shared' or 'firstprivate' in OpenMP clause 'default'}}
   for (int i=0; i<200; i++) foo();
 
   #pragma omp target
   #pragma omp teams distribute simd default(none) // expected-note {{explicit data sharing attribute requested here}}
   for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
 
+#pragma omp target
+#pragma omp teams distribute simd default(firstprivate) // expected-note {{explicit data sharing attribute requested here}}
+  for (int i = 0; i < 200; i++)
+    ++x; // expected-error {{variable 'x' must have explicitly specified data sharing attributes}}
+
+#pragma omp target
+#pragma omp teams distribute simd default(firstprivate) // expected-note {{explicit data sharing attribute requested here}}
+  for (int i = 0; i < 200; i++)
+    ++y; // expected-error {{variable 'y' must have explicitly specified data sharing attributes}}
+
   return 0;
 }
diff --git a/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
--- a/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
@@ -2805,11 +2805,18 @@
   EXPECT_TRUE(matchesWithOpenMP(Source3, Matcher));
 
   const std::string Source4 = R"(
+void x() {
+#pragma omp parallel default(firstprivate)
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source4, Matcher));
+
+  const std::string Source5 = R"(
 void x(int x) {
 #pragma omp parallel num_threads(x)
 ;
 })";
-  EXPECT_TRUE(matchesWithOpenMP(Source4, Matcher));
+  EXPECT_TRUE(matchesWithOpenMP(Source5, Matcher));
 }
 
 TEST(OMPDefaultClause, isNoneKind) {
@@ -2845,10 +2852,17 @@
 
   const std::string Source4 = R"(
 void x(int x) {
-#pragma omp parallel num_threads(x)
+#pragma omp parallel default(firstprivate)
 ;
 })";
   EXPECT_TRUE(notMatchesWithOpenMP(Source4, Matcher));
+
+  const std::string Source5 = R"(
+void x(int x) {
+#pragma omp parallel num_threads(x)
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source5, Matcher));
 }
 
 TEST(OMPDefaultClause, isSharedKind) {
@@ -2884,10 +2898,63 @@
 
   const std::string Source4 = R"(
 void x(int x) {
-#pragma omp parallel num_threads(x)
+#pragma omp parallel default(firstprivate)
 ;
 })";
   EXPECT_TRUE(notMatchesWithOpenMP(Source4, Matcher));
+
+  const std::string Source5 = R"(
+void x(int x) {
+#pragma omp parallel num_threads(x)
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source5, Matcher));
+}
+
+TEST(OMPDefaultClause, isFirstPrivateKind) {
+  auto Matcher = ompExecutableDirective(
+      hasAnyClause(ompDefaultClause(isFirstPrivateKind())));
+
+  const std::string Source0 = R"(
+void x() {
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source0, Matcher));
+
+  const std::string Source1 = R"(
+void x() {
+#pragma omp parallel
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source1, Matcher));
+
+  const std::string Source2 = R"(
+void x() {
+#pragma omp parallel default(shared)
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source2, Matcher));
+
+  const std::string Source3 = R"(
+void x() {
+#pragma omp parallel default(none)
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source3, Matcher));
+
+  const std::string Source4 = R"(
+void x(int x) {
+#pragma omp parallel default(firstprivate)
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source4, Matcher));
+
+  const std::string Source5 = R"(
+void x(int x) {
+#pragma omp parallel num_threads(x)
+;
+})";
+  EXPECT_TRUE(notMatchesWithOpenMP(Source5, Matcher));
 }
 
 TEST(OMPExecutableDirective, isAllowedToContainClauseKind) {
@@ -2922,24 +2989,31 @@
   EXPECT_TRUE(matchesWithOpenMP(Source3, Matcher));
 
   const std::string Source4 = R"(
-void x(int x) {
-#pragma omp parallel num_threads(x)
+void x() {
+#pragma omp parallel default(firstprivate)
 ;
 })";
   EXPECT_TRUE(matchesWithOpenMP(Source4, Matcher));
 
   const std::string Source5 = R"(
+void x(int x) {
+#pragma omp parallel num_threads(x)
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source5, Matcher));
+
+  const std::string Source6 = R"(
 void x() {
 #pragma omp taskyield
 })";
-  EXPECT_TRUE(notMatchesWithOpenMP(Source5, Matcher));
+  EXPECT_TRUE(notMatchesWithOpenMP(Source6, Matcher));
 
-  const std::string Source6 = R"(
+  const std::string Source7 = R"(
 void x() {
 #pragma omp task
 ;
 })";
-  EXPECT_TRUE(matchesWithOpenMP(Source6, Matcher));
+  EXPECT_TRUE(matchesWithOpenMP(Source7, Matcher));
 }
 
 } // namespace ast_matchers
diff --git a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
--- a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -1843,11 +1843,18 @@
   EXPECT_TRUE(matchesWithOpenMP(Source3, Matcher));
 
   const std::string Source4 = R"(
+void x() {
+#pragma omp parallel default(firstprivate)
+;
+})";
+  EXPECT_TRUE(matchesWithOpenMP(Source4, Matcher));
+
+  const std::string Source5 = R"(
 void x(int x) {
 #pragma omp parallel num_threads(x)
 ;
 })";
-  EXPECT_TRUE(notMatchesWithOpenMP(Source4, Matcher));
+  EXPECT_TRUE(notMatchesWithOpenMP(Source5, Matcher));
 }
 
 TEST(MatchFinderAPI, matchesDynamic) {
diff --git a/llvm/include/llvm/Frontend/OpenMP/OMPKinds.def b/llvm/include/llvm/Frontend/OpenMP/OMPKinds.def
--- a/llvm/include/llvm/Frontend/OpenMP/OMPKinds.def
+++ b/llvm/include/llvm/Frontend/OpenMP/OMPKinds.def
@@ -382,6 +382,7 @@
 
 __OMP_DEFAULT_KIND(none)
 __OMP_DEFAULT_KIND(shared)
+__OMP_DEFAULT_KIND(firstprivate)
 __OMP_DEFAULT_KIND(unknown)
 
 #undef __OMP_DEFAULT_KIND