[OPENMP] Initial support for parsing and sema analysis of 'untied' clause.

llvm-svn: 213257

clang/include/clang/AST/DataRecursiveASTVisitor.h

@@ -2386,6 +2386,11 @@ bool RecursiveASTVisitor<Derived>::VisitOMPNowaitClause(OMPNowaitClause *) {
   return true;
 }
 
+template <typename Derived>
+bool RecursiveASTVisitor<Derived>::VisitOMPUntiedClause(OMPUntiedClause *) {
+  return true;
+}
+
 template <typename Derived>
 template <typename T>
 bool RecursiveASTVisitor<Derived>::VisitOMPClauseList(T *Node) {

clang/include/clang/AST/OpenMPClause.h

@@ -711,6 +711,35 @@ public:
   StmtRange children() { return StmtRange(); }
 };
 
+/// \brief This represents 'untied' clause in the '#pragma omp ...' directive.
+///
+/// \code
+/// #pragma omp task untied
+/// \endcode
+/// In this example directive '#pragma omp task' has 'untied' clause.
+///
+class OMPUntiedClause : public OMPClause {
+public:
+  /// \brief Build 'untied' clause.
+  ///
+  /// \param StartLoc Starting location of the clause.
+  /// \param EndLoc Ending location of the clause.
+  ///
+  OMPUntiedClause(SourceLocation StartLoc, SourceLocation EndLoc)
+      : OMPClause(OMPC_untied, StartLoc, EndLoc) {}
+
+  /// \brief Build an empty clause.
+  ///
+  OMPUntiedClause()
+      : OMPClause(OMPC_untied, SourceLocation(), SourceLocation()) {}
+
+  static bool classof(const OMPClause *T) {
+    return T->getClauseKind() == OMPC_untied;
+  }
+
+  StmtRange children() { return StmtRange(); }
+};
+
 /// \brief This represents clause 'private' in the '#pragma omp ...' directives.
 ///
 /// \code

clang/include/clang/AST/RecursiveASTVisitor.h

@@ -2408,6 +2408,11 @@ bool RecursiveASTVisitor<Derived>::VisitOMPNowaitClause(OMPNowaitClause *) {
   return true;
 }
 
+template <typename Derived>
+bool RecursiveASTVisitor<Derived>::VisitOMPUntiedClause(OMPUntiedClause *) {
+  return true;
+}
+
 template <typename Derived>
 template <typename T>
 bool RecursiveASTVisitor<Derived>::VisitOMPClauseList(T *Node) {

clang/include/clang/Basic/OpenMPKinds.def

@@ -88,6 +88,7 @@ OPENMP_CLAUSE(proc_bind, OMPProcBindClause)
 OPENMP_CLAUSE(schedule, OMPScheduleClause)
 OPENMP_CLAUSE(ordered, OMPOrderedClause)
 OPENMP_CLAUSE(nowait, OMPNowaitClause)
+OPENMP_CLAUSE(untied, OMPUntiedClause)
 
 // Clauses allowed for OpenMP directive 'parallel'.
 OPENMP_PARALLEL_CLAUSE(if)
@@ -182,6 +183,7 @@ OPENMP_TASK_CLAUSE(default)
 OPENMP_TASK_CLAUSE(private)
 OPENMP_TASK_CLAUSE(firstprivate)
 OPENMP_TASK_CLAUSE(shared)
+OPENMP_TASK_CLAUSE(untied)
 
 #undef OPENMP_SCHEDULE_KIND
 #undef OPENMP_PROC_BIND_KIND

clang/include/clang/Sema/Sema.h

@@ -7440,6 +7440,9 @@ public:
   /// \brief Called on well-formed 'nowait' clause.
   OMPClause *ActOnOpenMPNowaitClause(SourceLocation StartLoc,
                                      SourceLocation EndLoc);
+  /// \brief Called on well-formed 'untied' clause.
+  OMPClause *ActOnOpenMPUntiedClause(SourceLocation StartLoc,
+                                     SourceLocation EndLoc);
 
   OMPClause *
   ActOnOpenMPVarListClause(OpenMPClauseKind Kind, ArrayRef<Expr *> Vars,

clang/lib/AST/StmtPrinter.cpp

@@ -657,6 +657,10 @@ void OMPClausePrinter::VisitOMPNowaitClause(OMPNowaitClause *) {
   OS << "nowait";
 }
 
+void OMPClausePrinter::VisitOMPUntiedClause(OMPUntiedClause *) {
+  OS << "untied";
+}
+
 template<typename T>
 void OMPClausePrinter::VisitOMPClauseList(T *Node, char StartSym) {
   for (typename T::varlist_iterator I = Node->varlist_begin(),

clang/lib/AST/StmtProfile.cpp

@@ -306,6 +306,8 @@ void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *) {}
 
 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
 
+void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
+
 template<typename T>
 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
   for (auto *I : Node->varlists())

clang/lib/Basic/OpenMPKinds.cpp

@@ -103,6 +103,7 @@ unsigned clang::getOpenMPSimpleClauseType(OpenMPClauseKind Kind,
   case OMPC_copyprivate:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");
@@ -159,6 +160,7 @@ const char *clang::getOpenMPSimpleClauseTypeName(OpenMPClauseKind Kind,
   case OMPC_copyprivate:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");

clang/lib/Parse/ParseOpenMP.cpp

@@ -292,7 +292,7 @@ bool Parser::ParseOpenMPSimpleVarList(OpenMPDirectiveKind Kind,
 ///       default-clause | private-clause | firstprivate-clause | shared-clause
 ///       | linear-clause | aligned-clause | collapse-clause |
 ///       lastprivate-clause | reduction-clause | proc_bind-clause |
-///       schedule-clause | copyin-clause | copyprivate-clause
+///       schedule-clause | copyin-clause | copyprivate-clause | untied-clause
 ///
 OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
                                      OpenMPClauseKind CKind, bool FirstClause) {
@@ -353,6 +353,7 @@ OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
     break;
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
     // OpenMP [2.7.1, Restrictions, p. 9]
     //  Only one ordered clause can appear on a loop directive.
     // OpenMP [2.7.1, Restrictions, C/C++, p. 4]
@@ -468,6 +469,9 @@ OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind) {
 ///    nowait-clause:
 ///         'nowait'
 ///
+///    untied-clause:
+///         'untied'
+///
 OMPClause *Parser::ParseOpenMPClause(OpenMPClauseKind Kind) {
   SourceLocation Loc = Tok.getLocation();
   ConsumeAnyToken();

clang/lib/Sema/SemaOpenMP.cpp

@@ -2068,6 +2068,7 @@ OMPClause *Sema::ActOnOpenMPSingleExprClause(OpenMPClauseKind Kind, Expr *Expr,
   case OMPC_copyprivate:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
   case OMPC_threadprivate:
   case OMPC_unknown:
     llvm_unreachable("Clause is not allowed.");
@@ -2268,6 +2269,7 @@ OMPClause *Sema::ActOnOpenMPSimpleClause(
   case OMPC_copyprivate:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
   case OMPC_threadprivate:
   case OMPC_unknown:
     llvm_unreachable("Clause is not allowed.");
@@ -2380,6 +2382,7 @@ OMPClause *Sema::ActOnOpenMPSingleExprWithArgClause(
   case OMPC_copyprivate:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
   case OMPC_threadprivate:
   case OMPC_unknown:
     llvm_unreachable("Clause is not allowed.");
@@ -2454,6 +2457,9 @@ OMPClause *Sema::ActOnOpenMPClause(OpenMPClauseKind Kind,
   case OMPC_nowait:
     Res = ActOnOpenMPNowaitClause(StartLoc, EndLoc);
     break;
+  case OMPC_untied:
+    Res = ActOnOpenMPUntiedClause(StartLoc, EndLoc);
+    break;
   case OMPC_if:
   case OMPC_final:
   case OMPC_num_threads:
@@ -2488,6 +2494,11 @@ OMPClause *Sema::ActOnOpenMPNowaitClause(SourceLocation StartLoc,
   return new (Context) OMPNowaitClause(StartLoc, EndLoc);
 }
 
+OMPClause *Sema::ActOnOpenMPUntiedClause(SourceLocation StartLoc,
+                                         SourceLocation EndLoc) {
+  return new (Context) OMPUntiedClause(StartLoc, EndLoc);
+}
+
 OMPClause *Sema::ActOnOpenMPVarListClause(
     OpenMPClauseKind Kind, ArrayRef<Expr *> VarList, Expr *TailExpr,
     SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation ColonLoc,
@@ -2535,6 +2546,7 @@ OMPClause *Sema::ActOnOpenMPVarListClause(
   case OMPC_schedule:
   case OMPC_ordered:
   case OMPC_nowait:
+  case OMPC_untied:
   case OMPC_threadprivate:
   case OMPC_unknown:
     llvm_unreachable("Clause is not allowed.");

clang/lib/Sema/TreeTransform.h

@@ -6644,6 +6644,13 @@ TreeTransform<Derived>::TransformOMPNowaitClause(OMPNowaitClause *C) {
   return C;
 }
 
+template <typename Derived>
+OMPClause *
+TreeTransform<Derived>::TransformOMPUntiedClause(OMPUntiedClause *C) {
+  // No need to rebuild this clause, no template-dependent parameters.
+  return C;
+}
+
 template <typename Derived>
 OMPClause *
 TreeTransform<Derived>::TransformOMPPrivateClause(OMPPrivateClause *C) {

clang/lib/Serialization/ASTReaderStmt.cpp

@@ -1709,6 +1709,9 @@ OMPClause *OMPClauseReader::readClause() {
   case OMPC_nowait:
     C = new (Context) OMPNowaitClause();
     break;
+  case OMPC_untied:
+    C = new (Context) OMPUntiedClause();
+    break;
   case OMPC_private:
     C = OMPPrivateClause::CreateEmpty(Context, Record[Idx++]);
     break;
@@ -1796,6 +1799,8 @@ void OMPClauseReader::VisitOMPOrderedClause(OMPOrderedClause *) {}
 
 void OMPClauseReader::VisitOMPNowaitClause(OMPNowaitClause *) {}
 
+void OMPClauseReader::VisitOMPUntiedClause(OMPUntiedClause *) {}
+
 void OMPClauseReader::VisitOMPPrivateClause(OMPPrivateClause *C) {
   C->setLParenLoc(Reader->ReadSourceLocation(Record, Idx));
   unsigned NumVars = C->varlist_size();

clang/lib/Serialization/ASTWriterStmt.cpp

@@ -1731,6 +1731,8 @@ void OMPClauseWriter::VisitOMPOrderedClause(OMPOrderedClause *) {}
 
 void OMPClauseWriter::VisitOMPNowaitClause(OMPNowaitClause *) {}
 
+void OMPClauseWriter::VisitOMPUntiedClause(OMPUntiedClause *) {}
+
 void OMPClauseWriter::VisitOMPPrivateClause(OMPPrivateClause *C) {
   Record.push_back(C->varlist_size());
   Writer->Writer.AddSourceLocation(C->getLParenLoc(), Record);

clang/test/OpenMP/task_ast_print.cpp

@@ -33,7 +33,7 @@ T tmain(T argc, T *argv) {
   T b = argc, c, d, e, f, g;
   static T a;
   S<T> s;
-#pragma omp task
+#pragma omp task untied
   a = 2;
 #pragma omp task default(none), private(argc, b) firstprivate(argv) shared(d) if (argc > 0) final(S<T>::TS > 0)
   foo();
@@ -46,7 +46,7 @@ T tmain(T argc, T *argv) {
 // CHECK-NEXT: int b = argc, c, d, e, f, g;
 // CHECK-NEXT: static int a;
 // CHECK-NEXT: S<int> s;
-// CHECK-NEXT: #pragma omp task
+// CHECK-NEXT: #pragma omp task untied
 // CHECK-NEXT: a = 2;
 // CHECK-NEXT: #pragma omp task default(none) private(argc,b) firstprivate(argv) shared(d) if(argc > 0) final(S<int>::TS > 0)
 // CHECK-NEXT: foo()
@@ -56,7 +56,7 @@ T tmain(T argc, T *argv) {
 // CHECK-NEXT: long b = argc, c, d, e, f, g;
 // CHECK-NEXT: static long a;
 // CHECK-NEXT: S<long> s;
-// CHECK-NEXT: #pragma omp task
+// CHECK-NEXT: #pragma omp task untied
 // CHECK-NEXT: a = 2;
 // CHECK-NEXT: #pragma omp task default(none) private(argc,b) firstprivate(argv) shared(d) if(argc > 0) final(S<long>::TS > 0)
 // CHECK-NEXT: foo()
@@ -66,7 +66,7 @@ T tmain(T argc, T *argv) {
 // CHECK-NEXT: T b = argc, c, d, e, f, g;
 // CHECK-NEXT: static T a;
 // CHECK-NEXT: S<T> s;
-// CHECK-NEXT: #pragma omp task
+// CHECK-NEXT: #pragma omp task untied
 // CHECK-NEXT: a = 2;
 // CHECK-NEXT: #pragma omp task default(none) private(argc,b) firstprivate(argv) shared(d) if(argc > 0) final(S<T>::TS > 0)
 // CHECK-NEXT: foo()
@@ -82,8 +82,8 @@ int main(int argc, char **argv) {
 #pragma omp threadprivate(a)
   Enum ee;
 // CHECK: Enum ee;
-#pragma omp task
-  // CHECK-NEXT: #pragma omp task
+#pragma omp task untied
+  // CHECK-NEXT: #pragma omp task untied
   a = 2;
 // CHECK-NEXT: a = 2;
 #pragma omp task default(none), private(argc, b) firstprivate(argv) if (argc > 0) final(a > 0)

clang/test/OpenMP/task_messages.cpp

@@ -97,6 +97,9 @@ int foo() {
 // expected-error@+1 {{region cannot be closely nested inside 'task' region; perhaps you forget to enclose 'omp for' directive into a parallel region?}}
 #pragma omp for reduction(+ : r)
   ++r;
+// expected-error@+1 {{directive '#pragma omp task' cannot contain more than one 'untied' clause}}
+#pragma omp task untied untied
+  ++r;
   return a + b;
 }
 
@@ -256,6 +259,9 @@ L2:
 // expected-error@+1 {{region cannot be closely nested inside 'task' region; perhaps you forget to enclose 'omp for' directive into a parallel region?}}
 #pragma omp for reduction(+ : r)
   ++r;
+// expected-error@+1 {{directive '#pragma omp task' cannot contain more than one 'untied' clause}}
+#pragma omp task untied untied
+  ++r;
   // expected-note@+2 {{in instantiation of function template specialization 'foo<int>' requested here}}
   // expected-note@+1 {{in instantiation of function template specialization 'foo<S>' requested here}}
   return foo<int>() + foo<S>();

clang/tools/libclang/CIndex.cpp

@@ -1968,6 +1968,8 @@ void OMPClauseEnqueue::VisitOMPOrderedClause(const OMPOrderedClause *) {}
 
 void OMPClauseEnqueue::VisitOMPNowaitClause(const OMPNowaitClause *) {}
 
+void OMPClauseEnqueue::VisitOMPUntiedClause(const OMPUntiedClause *) {}
+
 template<typename T>
 void OMPClauseEnqueue::VisitOMPClauseList(T *Node) {
   for (const auto *I : Node->varlists())