Don't require storage access for explicit dereferences used as
lvalue (e.g. Some_Access.all'Address) or for renamings.
gcc/ada/
* gcc-interface/trans.cc (get_storage_model_access): Don't require
storage model access for dereference used as lvalue or renamings.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/gcc-interface/trans.cc | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/gcc/ada/gcc-interface/trans.cc b/gcc/ada/gcc-interface/trans.cc
index 13f438c424b..f4a5db002f4 100644
--- a/gcc/ada/gcc-interface/trans.cc
+++ b/gcc/ada/gcc-interface/trans.cc
@@ -4398,14 +4398,32 @@ static void
get_storage_model_access (Node_Id gnat_node, Entity_Id *gnat_smo)
{
const Node_Id gnat_parent = Parent (gnat_node);
+ *gnat_smo = Empty;
- /* If we are the prefix of the parent, then the access is above us. */
- if (node_is_component (gnat_parent) && Prefix (gnat_parent) == gnat_node)
+ switch (Nkind (gnat_parent))
{
- *gnat_smo = Empty;
+ case N_Attribute_Reference:
+ /* If the parent is an attribute reference that requires an lvalue and
+ gnat_node is the Prefix (i.e. not a parameter), we do not need to
+ actually access any storage. */
+ if (lvalue_required_for_attribute_p (gnat_parent)
+ && Prefix (gnat_parent) == gnat_node)
+ return;
+ break;
+
+ case N_Object_Renaming_Declaration:
+ /* Nothing to do for the identifier in an object renaming declaration,
+ the renaming itself does not need storage model access. */
return;
+
+ default:
+ break;
}
+ /* If we are the prefix of the parent, then the access is above us. */
+ if (node_is_component (gnat_parent) && Prefix (gnat_parent) == gnat_node)
+ return;
+
/* Now strip any type conversion from GNAT_NODE. */
if (Nkind (gnat_node) == N_Type_Conversion
|| Nkind (gnat_node) == N_Unchecked_Type_Conversion)
--
2.40.0
