tree.h (TYPE_NEEDS_CONSTRUCTING): New macro.

Wed Jul 13 03:30:36 1994  Jason Merrill  (jason@deneb.cygnus.com)

        * tree.h (TYPE_NEEDS_CONSTRUCTING): New macro.
        (tree_type): Add needs_constructing_flag.
        * function.c (assign_parms): If TYPE_NEEDS_CONSTRUCTING, pass by
        invisible reference.
        * calls.c (expand_call): Ditto.

From-SVN: r7758

gcc/calls.c

@@ -996,6 +996,7 @@ expand_call (exp, target, ignore)
       /* See if this argument should be passed by invisible reference.  */
       if ((TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST
 	   && contains_placeholder_p (TYPE_SIZE (type)))
+	  || TYPE_NEEDS_CONSTRUCTING (type)
 #ifdef FUNCTION_ARG_PASS_BY_REFERENCE
 	  || FUNCTION_ARG_PASS_BY_REFERENCE (args_so_far, TYPE_MODE (type),
 					     type, argpos < n_named_args)

gcc/function.c

@@ -3157,6 +3157,7 @@ assign_parms (fndecl, second_time)
 
       if ((TREE_CODE (TYPE_SIZE (passed_type)) != INTEGER_CST
 	   && contains_placeholder_p (TYPE_SIZE (passed_type)))
+	  || TYPE_NEEDS_CONSTRUCTING (passed_type)
 #ifdef FUNCTION_ARG_PASS_BY_REFERENCE
 	  || FUNCTION_ARG_PASS_BY_REFERENCE (args_so_far, passed_mode,
 					      passed_type, ! last_named)

gcc/tree.h

@@ -615,6 +615,10 @@ struct tree_block
    If set in a SET_TYPE, indicates a bitstring type. */
 #define TYPE_STRING_FLAG(NODE) ((NODE)->type.string_flag)
 
+/* Indicates that objects of this type must be initialized by calling a
+   function when they are created.  */
+#define TYPE_NEEDS_CONSTRUCTING(NODE) ((NODE)->type.needs_constructing_flag)
+
 struct tree_type
 {
   char common[sizeof (struct tree_common)];
@@ -632,6 +636,7 @@ struct tree_type
 
   unsigned string_flag : 1;
   unsigned no_force_blk_flag : 1;
+  unsigned needs_constructing_flag : 1;
   unsigned lang_flag_0 : 1;
   unsigned lang_flag_1 : 1;
   unsigned lang_flag_2 : 1;
@@ -639,7 +644,7 @@ struct tree_type
   unsigned lang_flag_4 : 1;
   unsigned lang_flag_5 : 1;
   unsigned lang_flag_6 : 1;
-  /* room for 7 more bits */
+  /* room for 6 more bits */
 
   unsigned int align;
   union tree_node *pointer_to;