[OpenMP] Sema and parsing for 'teams distribute' pragma

This patch is to implement sema and parsing for 'teams distribute' pragma.

Differential Revision: https://reviews.llvm.org/D23189

llvm-svn: 277818
diff --git a/clang/test/OpenMP/teams_distribute_default_messages.cpp b/clang/test/OpenMP/teams_distribute_default_messages.cpp
new file mode 100644
index 0000000..bf62930
--- /dev/null
+++ b/clang/test/OpenMP/teams_distribute_default_messages.cpp
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -verify -fopenmp %s
+
+void foo();
+
+int main(int argc, char **argv) {
+  #pragma omp target
+  #pragma omp teams distribute default // expected-error {{expected '(' after 'default'}}
+  for (int i=0; i<200; i++) foo();
+  #pragma omp target
+  #pragma omp teams distribute default ( // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+  for (int i=0; i<200; i++) foo();
+  #pragma omp target
+  #pragma omp teams distribute default () // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+  for (int i=0; i<200; i++) foo();
+  #pragma omp target
+  #pragma omp teams distribute default (none // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  for (int i=0; i<200; i++) foo();
+  #pragma omp target
+  #pragma omp teams distribute default (shared), default(shared) // expected-error {{directive '#pragma omp teams distribute' cannot contain more than one 'default' clause}}
+  for (int i=0; i<200; i++) foo();
+  #pragma omp target
+  #pragma omp teams distribute default (x) // expected-error {{expected 'none' or 'shared' in OpenMP clause 'default'}}
+  for (int i=0; i<200; i++) foo();
+
+  #pragma omp target
+  #pragma omp teams distribute default(none)
+  for (int i=0; i<200; i++) ++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
+
+  return 0;
+}