Index: clang/lib/CodeGen/CGStmt.cpp
===================================================================
--- clang/lib/CodeGen/CGStmt.cpp
+++ clang/lib/CodeGen/CGStmt.cpp
@@ -428,7 +428,7 @@
     llvm_unreachable("target parallel loop directive not supported yet.");
     break;
   case Stmt::OMPParallelMaskedDirectiveClass:
-    llvm_unreachable("parallel masked directive not supported yet.");
+    EmitOMPParallelMaskedDirective(cast<OMPParallelMaskedDirective>(*S));
     break;
   }
 }
Index: clang/lib/CodeGen/CGStmtOpenMP.cpp
===================================================================
--- clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -4489,6 +4489,33 @@
   checkForLastprivateConditionalUpdate(*this, S);
 }
 
+void CodeGenFunction::EmitOMPParallelMaskedDirective(
+    const OMPParallelMaskedDirective &S) {
+  // Emit directive as a combined directive that consists of two implicit
+  // directives: 'parallel' with 'masked' directive.
+  auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
+    Action.Enter(CGF);
+    OMPPrivateScope PrivateScope(CGF);
+    emitOMPCopyinClause(CGF, S);
+    (void)CGF.EmitOMPFirstprivateClause(S, PrivateScope);
+    CGF.EmitOMPPrivateClause(S, PrivateScope);
+    CGF.EmitOMPReductionClauseInit(S, PrivateScope);
+    (void)PrivateScope.Privatize();
+    emitMasked(CGF, S);
+    CGF.EmitOMPReductionClauseFinal(S, /*ReductionKind=*/OMPD_parallel);
+  };
+  {
+    auto LPCRegion =
+        CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
+    emitCommonOMPParallelDirective(*this, S, OMPD_masked, CodeGen,
+                                   emitEmptyBoundParameters);
+    emitPostUpdateForReductionClause(*this, S,
+                                     [](CodeGenFunction &) { return nullptr; });
+  }
+  // Check for outer lastprivate conditional update.
+  checkForLastprivateConditionalUpdate(*this, S);
+}
+
 void CodeGenFunction::EmitOMPParallelSectionsDirective(
     const OMPParallelSectionsDirective &S) {
   // Emit directive as a combined directive that consists of two implicit
Index: clang/lib/CodeGen/CodeGenFunction.h
===================================================================
--- clang/lib/CodeGen/CodeGenFunction.h
+++ clang/lib/CodeGen/CodeGenFunction.h
@@ -3585,6 +3585,7 @@
       const OMPTargetTeamsDistributeSimdDirective &S);
   void EmitOMPGenericLoopDirective(const OMPGenericLoopDirective &S);
   void EmitOMPInteropDirective(const OMPInteropDirective &S);
+  void EmitOMPParallelMaskedDirective(const OMPParallelMaskedDirective &S);
 
   /// Emit device code for the target directive.
   static void EmitOMPTargetDeviceFunction(CodeGenModule &CGM,
Index: clang/lib/Parse/ParseOpenMP.cpp
===================================================================
--- clang/lib/Parse/ParseOpenMP.cpp
+++ clang/lib/Parse/ParseOpenMP.cpp
@@ -2483,8 +2483,8 @@
 ///         simd' | 'teams distribute parallel for simd' | 'teams distribute
 ///         parallel for' | 'target teams' | 'target teams distribute' | 'target
 ///         teams distribute parallel for' | 'target teams distribute parallel
-///         for simd' | 'target teams distribute simd' | 'masked' {clause}
-///         annot_pragma_openmp_end
+///         for simd' | 'target teams distribute simd' | 'masked' |
+///         'parallel masked' {clause} annot_pragma_openmp_end
 ///
 StmtResult Parser::ParseOpenMPDeclarativeOrExecutableDirective(
     ParsedStmtContext StmtCtx, bool ReadDirectiveWithinMetadirective) {
Index: clang/test/OpenMP/parallel_masked.cpp
===================================================================
--- /dev/null
+++ clang/test/OpenMP/parallel_masked.cpp
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=52 -verify %s -emit-llvm -o - | FileCheck %s --check-prefix
+// expected-no-diagnostics
+
+void foo();
+
+// CHECK-LABEL: define dso_local void @masked
+// CHECK-SAME: () #[[ATTR0:[0-9]+]] {
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void (ptr, i32, ptr, ...) @__kmpc_fork_call(ptr @[[GLOB1:[0-9]+]], i32 0, ptr @.omp_outlined.)
+// CHECK-NEXT:    ret void
+//
+void masked() {
+    #pragma omp parallel masked
+    {
+        foo();
+    }
+}
+
+
+// CHECK-LABEL: define dso_local void @master
+// CHECK-SAME: () #[[ATTR0]] {
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void (ptr, i32, ptr, ...) @__kmpc_fork_call(ptr @[[GLOB1]], i32 0, ptr @.omp_outlined..1)
+// CHECK-NEXT:    ret void
+//
+void master() {
+    #pragma omp parallel master
+    {
+        foo();
+    }
+}