In this release label is ignored and reduction throws an error

clang/include/clang/Basic/DiagnosticParseKinds.td

@@ -1216,6 +1216,8 @@ def err_openclcxx_virtual_function : Error<
   "virtual functions are not supported in C++ for OpenCL">;
 
 // OmpSs support.
+def warn_oss_ignoring_clause : Warning<
+  "unsupported OmpSs-2 clause '%0' in directive '#pragma oss %1' - ignoring">;
 def warn_pragma_oss_ignored : Warning<
   "unexpected '#pragma oss ...' in program">, InGroup<SourceUsesOmpSs>, DefaultIgnore;
 def err_oss_unexpected_directive : Error<

clang/include/clang/Basic/OmpSsKinds.def

@@ -100,7 +100,7 @@ OMPSS_TASK_CLAUSE(private)
 OMPSS_TASK_CLAUSE(firstprivate)
 OMPSS_TASK_CLAUSE(shared)
 OMPSS_TASK_CLAUSE(depend)
-OMPSS_TASK_CLAUSE(reduction)
+// OMPSS_TASK_CLAUSE(reduction)
 OMPSS_TASK_CLAUSE(in)
 OMPSS_TASK_CLAUSE(out)
 OMPSS_TASK_CLAUSE(inout)
@@ -110,7 +110,7 @@ OMPSS_TASK_CLAUSE(weakin)
 OMPSS_TASK_CLAUSE(weakout)
 OMPSS_TASK_CLAUSE(weakinout)
 OMPSS_TASK_CLAUSE(weakcommutative)
-OMPSS_TASK_CLAUSE(weakreduction)
+// OMPSS_TASK_CLAUSE(weakreduction)
 
 // Clauses allowed for OmpSs directive 'taskwait'.
 OMPSS_TASKWAIT_CLAUSE(depend)

clang/include/clang/Parse/Parser.h

@@ -434,6 +434,7 @@ public:
   const TargetInfo &getTargetInfo() const { return PP.getTargetInfo(); }
   Preprocessor &getPreprocessor() const { return PP; }
   Sema &getActions() const { return Actions; }
+  DiagnosticsEngine &getDiags() const { return Diags; }
   AttributeFactory &getAttrFactory() { return AttrFactory; }
 
   const Token &getCurToken() const { return Tok; }

clang/lib/Parse/ParseOmpSs.cpp

@@ -273,7 +273,12 @@ static bool parseDeclareTaskClauses(
     case OSSC_priority:
     case OSSC_label: {
       P.ConsumeToken();
-      if (FirstClauses[CKind]) {
+      bool IsLabel = CKind == OSSC_label;
+      if (IsLabel) {
+        P.Diag(Tok, diag::warn_oss_ignoring_clause)
+          << getOmpSsClauseName(CKind) << getOmpSsDirectiveName(OSSD_declare_task);
+      }
+      if (FirstClauses[CKind] && !IsLabel) {
         P.Diag(Tok, diag::err_oss_more_one_clause)
             << getOmpSsDirectiveName(OSSD_declare_task) << getOmpSsClauseName(CKind) << 0;
         IsError = true;
@@ -282,9 +287,11 @@ static bool parseDeclareTaskClauses(
       SingleClause = getSingleClause(CKind, IfRes, FinalRes,
                                      CostRes, PriorityRes,
                                      LabelRes);
+      P.getDiags().setSuppressAllDiagnostics(IsLabel);
       *SingleClause = P.ParseOmpSsParensExpr(getOmpSsClauseName(CKind), RLoc);
+      P.getDiags().setSuppressAllDiagnostics(false);
 
-      if (SingleClause->isInvalid())
+      if (SingleClause->isInvalid() && !IsLabel)
         IsError = true;
 
       FirstClauses[CKind] = true;
@@ -714,14 +721,22 @@ OSSClause *Parser::ParseOmpSsClause(OmpSsDirectiveKind DKind,
   case OSSC_final:
   case OSSC_cost:
   case OSSC_priority:
-  case OSSC_label:
-    if (!FirstClause) {
+  case OSSC_label: {
+    bool IsLabel = CKind == OSSC_label;
+    if (IsLabel) {
+      Diag(Tok, diag::warn_oss_ignoring_clause)
+        << getOmpSsClauseName(CKind) << getOmpSsDirectiveName(OSSD_task);
+    }
+    if (!FirstClause && !IsLabel) {
       Diag(Tok, diag::err_oss_more_one_clause)
           << getOmpSsDirectiveName(DKind) << getOmpSsClauseName(CKind) << 0;
       ErrorFound = true;
     }
+    Diags.setSuppressAllDiagnostics(IsLabel);
     Clause = ParseOmpSsSingleExprClause(CKind, WrongDirective);
+    Diags.setSuppressAllDiagnostics(false);
     break;
+  }
   case OSSC_wait:
     if (!FirstClause) {
       Diag(Tok, diag::err_oss_more_one_clause)