[OPENMP 4.5] parsing/sema support for 'grainsize' clause.
OpenMP 4.5 adds 'taksloop' and 'taskloop simd' directives, which have 'grainsize' clause. Patch adds parsing/sema analysis of this clause.

llvm-svn: 254903
diff --git a/clang/test/OpenMP/taskloop_ast_print.cpp b/clang/test/OpenMP/taskloop_ast_print.cpp
index 28862d8..9f4d6ed 100644
--- a/clang/test/OpenMP/taskloop_ast_print.cpp
+++ b/clang/test/OpenMP/taskloop_ast_print.cpp
@@ -13,8 +13,8 @@
   T b = argc, c, d, e, f, g;
   static T a;
 // CHECK: static T a;
-#pragma omp taskloop if(taskloop: argc > N) default(shared) untied priority(N)
-  // CHECK-NEXT: #pragma omp taskloop if(taskloop: argc > N) default(shared) untied priority(N)
+#pragma omp taskloop if(taskloop: argc > N) default(shared) untied priority(N) grainsize(N)
+  // CHECK-NEXT: #pragma omp taskloop if(taskloop: argc > N) default(shared) untied priority(N) grainsize(N)
   for (int i = 0; i < 2; ++i)
     a = 2;
 // CHECK-NEXT: for (int i = 0; i < 2; ++i)
@@ -59,12 +59,12 @@
 // CHECK-NEXT: for (int i = 0; i < 2; ++i)
 // CHECK-NEXT: a = 2;
 #pragma omp parallel
-#pragma omp taskloop private(argc, b), firstprivate(argv, c), lastprivate(d, f) collapse(2) shared(g) if(argc) mergeable priority(argc)
+#pragma omp taskloop private(argc, b), firstprivate(argv, c), lastprivate(d, f) collapse(2) shared(g) if(argc) mergeable priority(argc) grainsize(argc)
   for (int i = 0; i < 10; ++i)
     for (int j = 0; j < 10; ++j)
       foo();
   // CHECK-NEXT: #pragma omp parallel
-  // CHECK-NEXT: #pragma omp taskloop private(argc,b) firstprivate(argv,c) lastprivate(d,f) collapse(2) shared(g) if(argc) mergeable priority(argc)
+  // CHECK-NEXT: #pragma omp taskloop private(argc,b) firstprivate(argv,c) lastprivate(d,f) collapse(2) shared(g) if(argc) mergeable priority(argc) grainsize(argc)
   // CHECK-NEXT: for (int i = 0; i < 10; ++i)
   // CHECK-NEXT: for (int j = 0; j < 10; ++j)
   // CHECK-NEXT: foo();