[clang] [llvm] [OpenMP][Clang] Parsing/Sema support for `use_device_ptr(fb_preserve/fb_nullify)`. (2/4) (PR #170578)

[Zahira Ammarguellat via cfe-commits]

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@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -std=c++11 -fopenmp -fopenmp-version=60 -verify=omp60,expected -ferror-limit 200 %s
+// RUN: %clang_cc1 -std=c++11 -fopenmp -fopenmp-version=61 -verify=omp61,expected -ferror-limit 200 %s
+
+void f1(int x, int *p, int *q) {
+
+  // Test that fallback modifier is only recognized in OpenMP 6.1+
+#pragma omp target data map(x) use_device_ptr(fb_preserve: p) // omp60-error {{use of undeclared identifier 'fb_preserve'}}
+  {}
+
+#pragma omp target data map(x) use_device_ptr(fb_nullify: p) // omp60-error {{use of undeclared identifier 'fb_nullify'}}
+  {}
+
+  // Without modifier (should work in both versions)
+#pragma omp target data map(x) use_device_ptr(p)
+  {}
+
+  // Unknown modifier: should fail in both versions
+#pragma omp target data map(x) use_device_ptr(fb_abc: p) // expected-error {{use of undeclared identifier 'fb_abc'}}
+  {}
+
+  // Multiple modifiers: should fail in both versions
+#pragma omp target data map(x) use_device_ptr(fb_nullify, fb_preserve: p, q) // omp61-error {{missing ':' after fallback modifier}} omp61-error {{expected expression}} omp61-error {{use of undeclared identifier 'fb_preserve'}} omp60-error {{use of undeclared identifier 'fb_nullify'}} omp60-error {{use of undeclared identifier 'fb_preserve'}}
+  {}
+
+  // Test missing colon after modifier in OpenMP 6.1 - should error
+#pragma omp target data map(x) use_device_ptr(fb_preserve p) // omp61-error {{missing ':' after fallback modifier}} omp60-error {{use of undeclared identifier 'fb_preserve'}}
+  {}
+}
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zahiraam wrote:

Can you add this:
`#pragma omp target data map(x) use_device_ptr(fb_nullify: p, fb_preserve: q)`
to the test and confirms that it fails?

https://github.com/llvm/llvm-project/pull/170578