diff --git a/gcc/calls.cc b/gcc/calls.cc
index a4336c1..f4e1299 100644
--- a/gcc/calls.cc
+++ b/gcc/calls.cc
@@ -2186,10 +2186,11 @@ load_register_parameters (struct arg_data *args, int num_actuals,
 		   && immediate_const_ctor_p (DECL_INITIAL (tree_value)))
 	    {
 	      rtx target = gen_reg_rtx (word_mode);
-	      rtx x = expand_expr (DECL_INITIAL (tree_value),
-				   target, word_mode, EXPAND_NORMAL);
+	      store_constructor (DECL_INITIAL (tree_value), target, 0,
+				 int_expr_size (DECL_INITIAL (tree_value)),
+				 false);
 	      reg = gen_rtx_REG (word_mode, REGNO (reg));
-	      emit_move_insn (reg, x);
+	      emit_move_insn (reg, target);
 	    }
 	  else if (partial == 0 || args[i].pass_on_stack)
 	    {
diff --git a/gcc/expr.cc b/gcc/expr.cc
index fb062dc..85cb414 100644
--- a/gcc/expr.cc
+++ b/gcc/expr.cc
@@ -84,7 +84,6 @@ static void emit_block_move_via_loop (rtx, rtx, rtx, unsigned);
 static void clear_by_pieces (rtx, unsigned HOST_WIDE_INT, unsigned int);
 static rtx_insn *compress_float_constant (rtx, rtx);
 static rtx get_subtarget (rtx);
-static void store_constructor (tree, rtx, int, poly_int64, bool);
 static rtx store_field (rtx, poly_int64, poly_int64, poly_uint64, poly_uint64,
 			machine_mode, tree, alias_set_type, bool, bool);
 
@@ -100,7 +99,6 @@ static void do_tablejump (rtx, machine_mode, rtx, rtx, rtx,
 			  profile_probability);
 static rtx const_vector_from_tree (tree);
 static tree tree_expr_size (const_tree);
-static HOST_WIDE_INT int_expr_size (const_tree);
 static void convert_mode_scalar (rtx, rtx, int);
 
 
@@ -6757,7 +6755,7 @@ fields_length (const_tree type)
    which has been packed to exclude padding bits.
    If REVERSE is true, the store is to be done in reverse order.  */
 
-static void
+void
 store_constructor (tree exp, rtx target, int cleared, poly_int64 size,
 		   bool reverse)
 {
@@ -13209,7 +13207,7 @@ expr_size (tree exp)
 /* Return a wide integer for the size in bytes of the value of EXP, or -1
    if the size can vary or is larger than an integer.  */
 
-static HOST_WIDE_INT
+HOST_WIDE_INT
 int_expr_size (const_tree exp)
 {
   tree size;
diff --git a/gcc/expr.h b/gcc/expr.h
index d777c28..0351183 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -339,6 +339,8 @@ extern bool categorize_ctor_elements (const_tree, HOST_WIDE_INT *,
 				      HOST_WIDE_INT *, HOST_WIDE_INT *,
 				      bool *);
 extern bool immediate_const_ctor_p (const_tree, unsigned int words = 1);
+extern void store_constructor (tree, rtx, int, poly_int64, bool);
+extern HOST_WIDE_INT int_expr_size (const_tree exp);
 
 extern void expand_operands (tree, tree, rtx, rtx*, rtx*,
 			     enum expand_modifier);
diff --git a/gcc/testsuite/gcc.dg/pr105853.c b/gcc/testsuite/gcc.dg/pr105853.c
new file mode 100644
index 0000000..4f234ac
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105853.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+struct {
+  struct {
+    short e16[3];
+  }
+} const eth_addr_zero = {{}};  /* { dg-warning "no semicolon at" } */
+void compose_nd_na_ipv6_src() {
+  packet_set_nd(eth_addr_zero); /* { dg-warning "implicit declaration" } */
+}
diff --git a/gcc/testsuite/gcc.dg/pr105856.c b/gcc/testsuite/gcc.dg/pr105856.c
new file mode 100644
index 0000000..dd3aa2f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105856.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+#pragma pack(1)
+struct {
+  unsigned f0;
+} static g_251 = {6};
+void g_329_3() {
+  func_19(g_251);  /* { dg-warning "implicit declaration" } */
+}
+