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

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

Differential Revision: https://reviews.llvm.org/D27818

llvm-svn: 290038
diff --git a/clang/test/OpenMP/target_teams_device_messages.cpp b/clang/test/OpenMP/target_teams_device_messages.cpp
new file mode 100644
index 0000000..bd75da8
--- /dev/null
+++ b/clang/test/OpenMP/target_teams_device_messages.cpp
@@ -0,0 +1,39 @@
+// RUN: %clang_cc1 -triple x86_64-apple-macos10.7.0 -verify -fopenmp -ferror-limit 100 -o - %s
+
+void foo() {
+}
+
+bool foobool(int argc) {
+  return argc;
+}
+
+struct S1; // expected-note {{declared here}}
+
+int main(int argc, char **argv) {
+#pragma omp target teams device // expected-error {{expected '(' after 'device'}}
+  foo();
+#pragma omp target teams device ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+  foo();
+#pragma omp target teams device () // expected-error {{expected expression}}
+  foo();
+#pragma omp target teams device (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  foo();
+#pragma omp target teams device (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
+  foo();
+#pragma omp target teams device (argc > 0 ? argv[1] : argv[2]) // expected-error {{expression must have integral or unscoped enumeration type, not 'char *'}}
+  foo();
+#pragma omp target teams device (argc + argc)
+  foo();
+#pragma omp target teams device (argc), device (argc+1) // expected-error {{directive '#pragma omp target teams' cannot contain more than one 'device' clause}}
+  foo();
+#pragma omp target teams device (S1) // expected-error {{'S1' does not refer to a value}}
+  foo();
+#pragma omp target teams device (-2) // expected-error {{argument to 'device' clause must be a non-negative integer value}}
+  foo();
+#pragma omp target teams device (-10u)
+  foo();
+#pragma omp target teams device (3.14) // expected-error {{expression must have integral or unscoped enumeration type, not 'double'}}
+  foo();
+
+  return 0;
+}