decl.c (gnat_to_gnu_entity): Always take into account the Esize if it is known.

	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Always take
	into account the Esize if it is known.

From-SVN: r255958

gcc/ada/ChangeLog

+2017-12-21  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Always take
+	into account the Esize if it is known.
+
 2017-12-21  Richard Sandiford  <richard.sandiford@linaro.org>
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>

gcc/ada/gcc-interface/decl.c

@@ -723,7 +723,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, bool definition)
 				      TYPE_ALIGN (gnu_type));
 
 	/* Likewise, if a size is specified, use it if valid.  */
-	if (Known_Esize (gnat_entity) && No (Address_Clause (gnat_entity)))
+	if (Known_Esize (gnat_entity))
 	  gnu_size
 	    = validate_size (Esize (gnat_entity), gnu_type, gnat_entity,
 			     VAR_DECL, false, Has_Size_Clause (gnat_entity));

gcc/testsuite/ChangeLog

+2017-12-21  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/atomic9.adb: New test.
+
 2017-12-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/80747

gcc/testsuite/gnat.dg/atomic9.adb

+-- { dg-do compile }
+-- { dg-options "-fdump-tree-gimple" }
+
+with Interfaces;
+
+procedure Atomic9 is
+
+   Register : Interfaces.Unsigned_32;
+
+   type Interrupt_ID is range 0 .. 44;
+
+   procedure Trigger_Interrupt (IRQ : Interrupt_ID) is
+      NVIC_STIR : Interrupt_ID
+      with
+        Import,
+        Atomic,
+        Size    => 32,
+        Address => Register'Address;
+
+   begin
+      NVIC_STIR := IRQ;
+   end Trigger_Interrupt;
+
+begin
+   Register := 16#ffff_ffff#;
+   Trigger_Interrupt (1);
+end;
+
+-- { dg-final { scan-tree-dump "atomic_store_4" "gimple" } }