[flang][cuda] Allow fixed size array with the managed attribute (llvm#89436)

Fixed size array and scalar should be allowed with the `managed`
attribute.

Author: clementval

flang/lib/Semantics/check-declarations.cpp

@@ -956,9 +956,9 @@ void CheckHelper::CheckObjectEntity(
       break;
     case common::CUDADataAttr::Managed:
       if (!IsAutomatic(symbol) && !IsAllocatable(symbol) &&
-          !details.isDummy()) {
+          !details.isDummy() && !evaluate::IsExplicitShape(symbol)) {
         messages_.Say(
-            "Object '%s' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, or a dummy argument"_err_en_US,
+            "Object '%s' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, explicit shape, or a dummy argument"_err_en_US,
             symbol.name());
       }
       break;

flang/test/Semantics/cuf03.cuf

@@ -32,14 +32,11 @@ module m
   real, shared, target :: mst
   !ERROR: Object 'msa' with ATTRIBUTES(SHARED) must be declared in a device subprogram
   real, shared :: msa(*)
-  !ERROR: Object 'mm' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, or a dummy argument
-  real, managed :: mm
-  !ERROR: Object 'mmi' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, or a dummy argument
-  real, managed :: mmi = 1.
+  real, managed :: mm ! ok
+  real, managed :: mmi = 1. ! ok
   real, managed, allocatable :: mml ! ok
-  !ERROR: Object 'mmp' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, or a dummy argument
-  real, managed, pointer :: mmp ! ok
-  !ERROR: Object 'mmt' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, or a dummy argument
+  !ERROR: Object 'mmp' with ATTRIBUTES(MANAGED) must also be allocatable, automatic, explicit shape, or a dummy argument
+  real, managed, pointer :: mmp(:)
   real, managed, target :: mmt
   !WARNING: Object 'mp' with ATTRIBUTES(PINNED) should also be allocatable
   real, pinned :: mp