[clang] [llvm] [Clang] [OpenMP] Support NOWAIT with optional argument (PR #128742)

[Michael Klemm via llvm-commits]

================
@@ -6,13 +6,13 @@ void foo() {
 }
 
 int main(int argc, char **argv) {
-  #pragma omp target parallel nowait( // expected-warning {{extra tokens at the end of '#pragma omp target parallel' are ignored}}
-  foo();
+  #pragma omp target parallel nowait( //  expected-error {{expected expression}} //  expected-error {{expected ')'}} // expected-note {{to match this '('}}
+    foo();
   #pragma omp target parallel nowait (argc)) // expected-warning {{extra tokens at the end of '#pragma omp target parallel' are ignored}}
   foo();
   #pragma omp target parallel nowait device (-10u)
   foo();
-  #pragma omp target parallel nowait (3.14) device (-10u) // expected-warning {{extra tokens at the end of '#pragma omp target parallel' are ignored}}
+  #pragma omp target parallel nowait (3.14) device (-10u) // expected-error {{arguments of OpenMP clause 'nowait' with bitwise operators cannot be of floating type}}
----------------
mjklemm wrote:

```suggestion
  #pragma omp target parallel nowait (3.14) device (-10u) // expected-error {{arguments of OpenMP clause 'nowait' with bitwise operators cannot be of floating-point type}}
```

https://github.com/llvm/llvm-project/pull/128742