PR 84740 Wrong string length type in bounds check

Need to convert the RHS to the type of the LHS when assigning.

Regtested on x86_64-pc-linux-gnu, committed as obvious.

gcc/fortran/ChangeLog:

2018-01-10  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/84740
	* trans-array.c (gfc_trans_array_ctor_element): Convert RHS to the
	LHS type when assigning.

From-SVN: r256425

gcc/fortran/ChangeLog

+2018-01-10  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	PR fortran/84740
+	* trans-array.c (gfc_trans_array_ctor_element): Convert RHS to the
+	LHS type when assigning.
+
 2018-01-09  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/83742

gcc/fortran/trans-array.c

@@ -1562,7 +1562,8 @@ gfc_trans_array_ctor_element (stmtblock_t * pblock, tree desc,
 	  if (first_len)
 	    {
 	      gfc_add_modify (&se->pre, first_len_val,
-				   se->string_length);
+			      fold_convert (TREE_TYPE (first_len_val),
+						       se->string_length));
 	      first_len = false;
 	    }
 	  else
@@ -1571,7 +1572,9 @@ gfc_trans_array_ctor_element (stmtblock_t * pblock, tree desc,
 		 length.  */
 	      tree cond = fold_build2_loc (input_location, NE_EXPR,
 					   logical_type_node, first_len_val,
-					   se->string_length);
+					   fold_convert (TREE_TYPE
+							 (first_len_val),
+							 se->string_length));
 	      gfc_trans_runtime_check
 		(true, false, cond, &se->pre, &expr->where,
 		 "Different CHARACTER lengths (%ld/%ld) in array constructor",