[flang][cuda] Enforce PINNED attribute when ALLOCATE with PINNED option (#89455)

When the PINNED option is specified on an ALLOCATE statement, the object
must have the PINNED attribute.

Author: clementval

flang/lib/Semantics/check-allocate.cpp

@@ -611,6 +611,13 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
       return false;
     }
   }
+  if (allocateInfo_.gotPinned) {
+    std::optional<common::CUDADataAttr> cudaAttr{GetCUDADataAttr(ultimate_)};
+    if (!cudaAttr || *cudaAttr != common::CUDADataAttr::Pinned) {
+      context.Say(name_.source,
+          "Object in ALLOCATE must have PINNED attribute when PINNED option is specified"_err_en_US);
+    }
+  }
   return RunCoarrayRelatedChecks(context);
 }
 

flang/test/Semantics/cuf07.cuf

@@ -23,4 +23,12 @@ module m
     !BECAUSE: 'ma' is a host-associated allocatable and is not definable in a device subprogram
     deallocate(ma)
   end subroutine
+
+  subroutine hostsub()
+    integer, allocatable, device :: ia(:)
+    logical :: plog
+
+    !ERROR: Object in ALLOCATE must have PINNED attribute when PINNED option is specified
+    allocate(ia(100), pinned = plog)
+  end subroutine
 end module