varasm.c (output_constructor_regular_field): Check TYPE_SIZE_UNIT of the init value.

* varasm.c (output_constructor_regular_field): Check TYPE_SIZE_UNIT of
	the init value.

	* c-common.c (complete_flexible_array_elts): New helper function.
	* c-common.h (complete_flexible_array_elts): Declare.

	* c-decl.c (finish_decl): Call complete_flexible_array_elts.

	* decl.c (check_initializer): Call cp_complete_array_type.

From-SVN: r264147

gcc/ChangeLog

@@ -1,3 +1,8 @@
+2018-09-06  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* varasm.c (output_constructor_regular_field): Check TYPE_SIZE_UNIT of
+	the init value.
+
 2018-09-06  Will Schmidt  <will_schmidt@vnet.ibm.com>
 
 	* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): Add support for

gcc/c-family/ChangeLog

@@ -1,3 +1,8 @@
+2018-09-06  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* c-common.c (complete_flexible_array_elts): New helper function.
+	* c-common.h (complete_flexible_array_elts): Declare.
+
 2018-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	* c-common.c (braced_list_to_string): Remove eval parameter.

gcc/c-family/c-common.c

@@ -6425,6 +6425,28 @@ complete_array_type (tree *ptype, tree initial_value, bool do_default)
   return failure;
 }
 
+/* INIT is an constructor of a structure with a flexible array member.
+   Complete the flexible array member with a domain based on it's value.  */
+void
+complete_flexible_array_elts (tree init)
+{
+  tree elt, type;
+
+  if (init == NULL_TREE || TREE_CODE (init) != CONSTRUCTOR)
+    return;
+
+  if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init)))
+    return;
+
+  elt = CONSTRUCTOR_ELTS (init)->last ().value;
+  type = TREE_TYPE (elt);
+  if (TREE_CODE (type) == ARRAY_TYPE
+      && TYPE_SIZE (type) == NULL_TREE)
+    complete_array_type (&TREE_TYPE (elt), elt, false);
+  else
+    complete_flexible_array_elts (elt);
+}
+
 /* Like c_mark_addressable but don't check register qualifier.  */
 void 
 c_common_mark_addressable_vec (tree t)

gcc/c-family/c-common.h

@@ -1038,6 +1038,7 @@ extern tree fold_offsetof (tree, tree = size_type_node,
 			   tree_code ctx = ERROR_MARK);
 
 extern int complete_array_type (tree *, tree, bool);
+extern void complete_flexible_array_elts (tree);
 
 extern tree builtin_type_for_size (int, bool);
 

gcc/c/ChangeLog

@@ -1,3 +1,7 @@
+2018-09-06  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* c-decl.c (finish_decl): Call complete_flexible_array_elts.
+
 2018-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	* c-decl.c (finish_decl): Call braced_list_to_string here ...

gcc/c/c-decl.c

@@ -5042,6 +5042,8 @@ finish_decl (tree decl, location_t init_loc, tree init,
       if (init && TREE_CODE (init) == CONSTRUCTOR)
 	add_flexible_array_elts_to_size (decl, init);
 
+      complete_flexible_array_elts (DECL_INITIAL (decl));
+
       if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node
 	  && COMPLETE_TYPE_P (TREE_TYPE (decl)))
 	layout_decl (decl, 0);

gcc/cp/ChangeLog

@@ -1,3 +1,7 @@
+2018-09-06  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* decl.c (check_initializer): Call cp_complete_array_type.
+
 2018-09-05  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/87109, wrong overload with ref-qualifiers.

gcc/cp/decl.c

@@ -6478,6 +6478,16 @@ check_initializer (tree decl, tree init, int flags, vec<tree, va_gc> **cleanups)
 
 	  init_code = store_init_value (decl, init, cleanups, flags);
 
+	  if (DECL_INITIAL (decl)
+	      && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR
+	      && !vec_safe_is_empty (CONSTRUCTOR_ELTS (DECL_INITIAL (decl))))
+	    {
+	      tree elt = CONSTRUCTOR_ELTS (DECL_INITIAL (decl))->last ().value;
+	      if (TREE_CODE (TREE_TYPE (elt)) == ARRAY_TYPE
+		  && TYPE_SIZE (TREE_TYPE (elt)) == NULL_TREE)
+		cp_complete_array_type (&TREE_TYPE (elt), elt, false);
+	    }
+
 	  if (pedantic && TREE_CODE (type) == ARRAY_TYPE
 	      && DECL_INITIAL (decl)
 	      && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST

gcc/varasm.c

@@ -5160,6 +5160,8 @@ output_constructor_regular_field (oc_local_state *local)
 	     on the chain is a TYPE_DECL of the enclosing struct.  */
 	  const_tree next = DECL_CHAIN (local->field);
 	  gcc_assert (!fieldsize || !next || TREE_CODE (next) != FIELD_DECL);
+	  tree size = TYPE_SIZE_UNIT (TREE_TYPE (local->val));
+	  gcc_checking_assert (compare_tree_int (size, fieldsize) == 0);
 	}
       else
 	fieldsize = tree_to_uhwi (DECL_SIZE_UNIT (local->field));