[OPENMP]Use standard parsing for 'match' clause, NFC.

Reused standard clauses parsing scheme for parsing/matching 'match'
clause in 'declare variant' directive.

llvm-svn: 372635
diff --git a/clang/include/clang/AST/RecursiveASTVisitor.h b/clang/include/clang/AST/RecursiveASTVisitor.h
index c0cb6aa..afc701b 100644
--- a/clang/include/clang/AST/RecursiveASTVisitor.h
+++ b/clang/include/clang/AST/RecursiveASTVisitor.h
@@ -2844,6 +2844,7 @@
   case OMPC_threadprivate:
   case OMPC_uniform:
   case OMPC_device_type:
+  case OMPC_match:
   case OMPC_unknown:
     break;
   }
diff --git a/clang/include/clang/Basic/OpenMPKinds.def b/clang/include/clang/Basic/OpenMPKinds.def
index 05ecc34..2cd5b29 100644
--- a/clang/include/clang/Basic/OpenMPKinds.def
+++ b/clang/include/clang/Basic/OpenMPKinds.def
@@ -194,6 +194,9 @@
 #ifndef OPENMP_DEVICE_TYPE_KIND
 #define OPENMP_DEVICE_TYPE_KIND(Name)
 #endif
+#ifndef OPENMP_DECLARE_VARIANT_CLAUSE
+#define OPENMP_DECLARE_VARIANT_CLAUSE(Name)
+#endif
 
 // OpenMP directives.
 OPENMP_DIRECTIVE(threadprivate)
@@ -959,6 +962,10 @@
 OPENMP_DEVICE_TYPE_KIND(nohost)
 OPENMP_DEVICE_TYPE_KIND(any)
 
+// Clauses allowed for OpenMP directive 'declare variant'.
+OPENMP_DECLARE_VARIANT_CLAUSE(match)
+
+#undef OPENMP_DECLARE_VARIANT_CLAUSE
 #undef OPENMP_DEVICE_TYPE_KIND
 #undef OPENMP_ALLOCATE_CLAUSE
 #undef OPENMP_DECLARE_MAPPER_CLAUSE
diff --git a/clang/include/clang/Basic/OpenMPKinds.h b/clang/include/clang/Basic/OpenMPKinds.h
index 003737b..fe0ba51 100644
--- a/clang/include/clang/Basic/OpenMPKinds.h
+++ b/clang/include/clang/Basic/OpenMPKinds.h
@@ -36,6 +36,7 @@
   OMPC_threadprivate,
   OMPC_uniform,
   OMPC_device_type,
+  OMPC_match,
   OMPC_unknown
 };
 
diff --git a/clang/lib/AST/ASTTypeTraits.cpp b/clang/lib/AST/ASTTypeTraits.cpp
index 8615dee..875170c 100644
--- a/clang/lib/AST/ASTTypeTraits.cpp
+++ b/clang/lib/AST/ASTTypeTraits.cpp
@@ -117,6 +117,7 @@
   case OMPC_threadprivate:
   case OMPC_uniform:
   case OMPC_device_type:
+  case OMPC_match:
   case OMPC_unknown:
     llvm_unreachable("unexpected OpenMP clause kind");
   }
diff --git a/clang/lib/AST/OpenMPClause.cpp b/clang/lib/AST/OpenMPClause.cpp
index 0312fe6..bfe272b 100644
--- a/clang/lib/AST/OpenMPClause.cpp
+++ b/clang/lib/AST/OpenMPClause.cpp
@@ -44,6 +44,7 @@
   case OMPC_threadprivate:
   case OMPC_uniform:
   case OMPC_device_type:
+  case OMPC_match:
   case OMPC_unknown:
     break;
   }
@@ -129,6 +130,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     break;
   }
 
@@ -206,6 +208,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     break;
   }
 
diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index 4859027..f69efe1 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -56,6 +56,7 @@
 #include "clang/Basic/OpenMPKinds.def"
       .Case("uniform", OMPC_uniform)
       .Case("device_type", OMPC_device_type)
+      .Case("match", OMPC_match)
       .Default(OMPC_unknown);
 }
 
@@ -74,6 +75,8 @@
     return "threadprivate or thread local";
   case OMPC_device_type:
     return "device_type";
+  case OMPC_match:
+    return "match";
   }
   llvm_unreachable("Invalid OpenMP clause kind");
 }
@@ -200,6 +203,7 @@
   case OMPC_unified_shared_memory:
   case OMPC_reverse_offload:
   case OMPC_dynamic_allocators:
+  case OMPC_match:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");
@@ -393,6 +397,7 @@
   case OMPC_unified_shared_memory:
   case OMPC_reverse_offload:
   case OMPC_dynamic_allocators:
+  case OMPC_match:
     break;
   }
   llvm_unreachable("Invalid OpenMP simple clause kind");
@@ -836,6 +841,16 @@
       break;
     }
     break;
+  case OMPD_declare_variant:
+    switch (CKind) {
+#define OPENMP_DECLARE_VARIANT_CLAUSE(Name)                                    \
+  case OMPC_##Name:                                                            \
+    return true;
+#include "clang/Basic/OpenMPKinds.def"
+    default:
+      break;
+    }
+    break;
   case OMPD_declare_target:
   case OMPD_end_declare_target:
   case OMPD_unknown:
@@ -848,7 +863,6 @@
   case OMPD_cancellation_point:
   case OMPD_declare_reduction:
   case OMPD_declare_simd:
-  case OMPD_declare_variant:
     break;
   }
   return false;
diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index b41ad55..bb6323e 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -4038,6 +4038,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed in 'omp atomic'.");
   }
 }
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
index 8d852b5..570f246 100644
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -796,7 +796,7 @@
     // Parse inner context selector set name.
     if (!Tok.is(tok::identifier)) {
       Diag(Tok.getLocation(), diag::err_omp_declare_variant_no_ctx_selector)
-          << "match";
+          << getOpenMPClauseName(OMPC_match);
       return true;
     }
     SmallString<16> Buffer;
@@ -863,9 +863,12 @@
           Ptr, AssociatedFunction.get(), SourceRange(Loc, Tok.getLocation()));
 
   // Parse 'match'.
-  if (!Tok.is(tok::identifier) || PP.getSpelling(Tok).compare("match")) {
+  OpenMPClauseKind CKind = Tok.isAnnotation()
+                               ? OMPC_unknown
+                               : getOpenMPClauseKind(PP.getSpelling(Tok));
+  if (CKind != OMPC_match) {
     Diag(Tok.getLocation(), diag::err_omp_declare_variant_wrong_clause)
-        << "match";
+        << getOpenMPClauseName(OMPC_match);
     while (!SkipUntil(tok::annot_pragma_openmp_end, Parser::StopBeforeMatch))
       ;
     // Skip the last annot_pragma_openmp_end.
@@ -875,7 +878,8 @@
   (void)ConsumeToken();
   // Parse '('.
   BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
-  if (T.expectAndConsume(diag::err_expected_lparen_after, "match")) {
+  if (T.expectAndConsume(diag::err_expected_lparen_after,
+                         getOpenMPClauseName(OMPC_match))) {
     while (!SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch))
       ;
     // Skip the last annot_pragma_openmp_end.
@@ -1950,6 +1954,7 @@
     break;
   case OMPC_threadprivate:
   case OMPC_uniform:
+  case OMPC_match:
     if (!WrongDirective)
       Diag(Tok, diag::err_omp_unexpected_clause)
           << getOpenMPClauseName(CKind) << getOpenMPDirectiveName(DKind);
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 6f788fb..34ce66c 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -4599,6 +4599,7 @@
       case OMPC_dynamic_allocators:
       case OMPC_atomic_default_mem_order:
       case OMPC_device_type:
+      case OMPC_match:
         llvm_unreachable("Unexpected clause");
       }
       for (Stmt *CC : C->children()) {
@@ -10065,6 +10066,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed.");
   }
   return Res;
@@ -10615,6 +10617,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Unexpected OpenMP clause.");
   }
   return CaptureRegion;
@@ -11009,6 +11012,7 @@
   case OMPC_reverse_offload:
   case OMPC_dynamic_allocators:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed.");
   }
   return Res;
@@ -11188,6 +11192,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed.");
   }
   return Res;
@@ -11398,6 +11403,7 @@
   case OMPC_is_device_ptr:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed.");
   }
   return Res;
@@ -11605,6 +11611,7 @@
   case OMPC_dynamic_allocators:
   case OMPC_atomic_default_mem_order:
   case OMPC_device_type:
+  case OMPC_match:
     llvm_unreachable("Clause is not allowed.");
   }
   return Res;