re PR c/24255 (__transparent_union__ mishandled)

        PR c/24255
        * tree.h (DECL_TRANSPARENT_UNION): Remove.
        * function.c (assign_parm_find_data_types): Don't support it.
        * print-tree.c (print_node): Likewise.
        * c-common.c (handle_transparent_union_attribute): Likewise.
        Use build_duplicate_type.
        * tree-inline.c (remap_type_1): Split out of remap_type;
        properly remap aggregate fields.
        (build_duplicate_type): New.
        * doc/extend.texi (Variable Attributes): Remove documentation
        for transparent_union.

From-SVN: r105338

1 files changed, 3 insertions, 9 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index 144dbd8..f54f6d3 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2199,12 +2199,11 @@ struct tree_decl_common GTY(())
   /* In LABEL_DECL, this is DECL_ERROR_ISSUED.
      In VAR_DECL and PARM_DECL, this is DECL_REGISTER.  */
   unsigned decl_flag_0 : 1;
-  /* In FIELD_DECL, this is DECL_PACKED
-     In PARM_DECL, this is DECL_TRANSPARENT_UNION.  */
+  /* In FIELD_DECL, this is DECL_PACKED.  */
   unsigned decl_flag_1 : 1;
   /* In FIELD_DECL, this is DECL_BIT_FIELD
      In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL. 
-     In TYPE_DECL, this is TYPE_DECL_SUPRESS_DEBUG*/  
+     In TYPE_DECL, this is TYPE_DECL_SUPRESS_DEBUG.  */  
   unsigned decl_flag_2 : 1;  
   /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
      In VAR_DECL and PARM_DECL, this is DECL_HAS_VALUE_EXPR.  */
@@ -2386,12 +2385,6 @@ struct tree_const_decl GTY(())
    where the data was actually passed.  */
 #define DECL_INCOMING_RTL(NODE) (PARM_DECL_CHECK (NODE)->parm_decl.incoming_rtl)
 
-/* Used in PARM_DECLs whose type are unions to indicate that the
-   argument should be passed in the same way that the first union
-   alternative would be passed.  */
-#define DECL_TRANSPARENT_UNION(NODE) \
-  (PARM_DECL_CHECK (NODE)->decl_common.decl_flag_1)
-
 struct tree_parm_decl GTY(())
 {
   struct tree_decl_with_rtl common;
@@ -3989,6 +3982,7 @@ extern bool debug_find_tree (tree, tree);
 /* This is in tree-inline.c since the routine uses
    data structures from the inliner.  */
 extern tree unsave_expr_now (tree);
+extern tree build_duplicate_type (tree);
 
 /* In emit-rtl.c */
 extern rtx emit_line_note (location_t);