allocators without traits

Author: urvi-rav

clang/lib/Sema/SemaOpenMP.cpp

@@ -24083,11 +24083,13 @@ OMPClause *SemaOpenMP::ActOnOpenMPUsesAllocatorClause(
       // OpenMP [2.12.5, target Construct]
       // Non-predefined allocators appearing in a uses_allocators clause must
       // have traits specified.
+      if (getLangOpts().OpenMP < 52) {
       if (!IsPredefinedAllocator && !D.AllocatorTraits) {
         Diag(D.Allocator->getExprLoc(),
              diag::err_omp_nonpredefined_allocator_without_traits);
         continue;
       }
+    }
       // No allocator traits - just convert it to rvalue.
       if (!D.AllocatorTraits)
         AllocatorExpr = SemaRef.DefaultLvalueConversion(AllocatorExpr).get();

clang/test/OpenMP/target_uses_allocators_messages.cpp

@@ -62,6 +62,8 @@ int main(int argc, char **argv) {
 #else
 #pragma omp target teams uses_allocators(traits(my_traits): my_alloc; traits(aligned_traits): aligned_alloc)
 {}
+#pragma omp target teams uses_allocators(my_alloc)
+{}
 #pragma omp target teams uses_allocators(traits(my_traits): my_alloc, traits(aligned_traits): aligned_alloc) // omp52-error {{',' not allowed as separator in 'uses_allocators' clause, use ';' instead}}
 {}
 #pragma omp target teams uses_allocators(my_alloc(my_traits), aligned_alloc(aligned_traits)) // omp52-warning {{old syntax 'allocator(expr)' on 'uses_allocators' clause was deprecated, use new syntax 'traits(expr): alloc'}} //omp52-warning {{old syntax 'allocator(expr)' on 'uses_allocators' clause was deprecated, use new syntax 'traits(expr): alloc'}}