Add C++ attribute abi_tag and -Wabi-tag option.

gcc/
	* attribs.c (lookup_attribute_spec): Handle getting a TREE_LIST.
gcc/c-family/
	* c.opt (Wabi-tag): New.
gcc/cp/
	* tree.c (cxx_attribute_table): Add abi_tag attribute.
	(check_abi_tag_redeclaration, handle_abi_tag_attribute): New.
	* class.c (find_abi_tags_r, check_abi_tags): New.
	(check_bases, check_field_decl): Call check_abi_tags.
	* decl.c (redeclaration_error_message): Call
	check_abi_tag_redeclaration.
	* mangle.c (tree_string_cmp, write_abi_tags): New.
	(write_unqualified_name): Call write_abi_tags.
include/
	* demangle.h (enum demangle_component_type): Add
	DEMANGLE_COMPONENT_TAGGED_NAME.
libiberty/
	* cp-demangle.c (d_dump): Handle DEMANGLE_COMPONENT_TAGGED_NAME.
	(d_make_comp, d_find_pack, d_print_comp): Likewise.
	(d_abi_tags): New.
	(d_name): Call it.

From-SVN: r193367

2 files changed, 50 insertions, 5 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 303dda2..af12cd8 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,10 @@
+2012-11-09  Jason Merrill  <jason@redhat.com>
+
+	* cp-demangle.c (d_dump): Handle DEMANGLE_COMPONENT_TAGGED_NAME.
+	(d_make_comp, d_find_pack, d_print_comp): Likewise.
+	(d_abi_tags): New.
+	(d_name): Call it.
+
 2012-10-08  Jason Merrill  <jason@redhat.com>
 
 	* cp-demangle.c (d_special_name, d_dump): Handle TH and TW.
diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c
index 32df38c..86c7747 100644
--- a/libiberty/cp-demangle.c
+++ b/libiberty/cp-demangle.c
@@ -508,6 +508,11 @@ d_dump (struct demangle_component *dc, int indent)
     case DEMANGLE_COMPONENT_NAME:
       printf ("name '%.*s'\n", dc->u.s_name.len, dc->u.s_name.s);
       return;
+    case DEMANGLE_COMPONENT_TAGGED_NAME:
+      printf ("tagged name\n");
+      d_dump (dc->u.s_binary.left, indent + 2);
+      d_dump (dc->u.s_binary.right, indent + 2);
+      return;
     case DEMANGLE_COMPONENT_TEMPLATE_PARAM:
       printf ("template parameter %ld\n", dc->u.s_number.number);
       return;
@@ -809,6 +814,7 @@ d_make_comp (struct d_info *di, enum demangle_component_type type,
     case DEMANGLE_COMPONENT_QUAL_NAME:
     case DEMANGLE_COMPONENT_LOCAL_NAME:
     case DEMANGLE_COMPONENT_TYPED_NAME:
+    case DEMANGLE_COMPONENT_TAGGED_NAME:
     case DEMANGLE_COMPONENT_TEMPLATE:
     case DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE:
     case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
@@ -1202,6 +1208,23 @@ d_encoding (struct d_info *di, int top_level)
     }
 }
 
+/* <tagged-name> ::= <name> B <source-name> */
+
+static struct demangle_component *
+d_abi_tags (struct d_info *di, struct demangle_component *dc)
+{
+  char peek;
+  while (peek = d_peek_char (di),
+	 peek == 'B')
+    {
+      struct demangle_component *tag;
+      d_advance (di, 1);
+      tag = d_source_name (di);
+      dc = d_make_comp (di, DEMANGLE_COMPONENT_TAGGED_NAME, dc, tag);
+    }
+  return dc;
+}
+
 /* <name> ::= <nested-name>
           ::= <unscoped-name>
           ::= <unscoped-template-name> <template-args>
@@ -1223,14 +1246,17 @@ d_name (struct d_info *di)
   switch (peek)
     {
     case 'N':
-      return d_nested_name (di);
+      dc = d_nested_name (di);
+      break;
 
     case 'Z':
-      return d_local_name (di);
+      dc = d_local_name (di);
+      break;
 
     case 'L':
     case 'U':
-      return d_unqualified_name (di);
+      dc = d_unqualified_name (di);
+      break;
 
     case 'S':
       {
@@ -1272,7 +1298,7 @@ d_name (struct d_info *di)
 			      d_template_args (di));
 	  }
 
-	return dc;
+	break;
       }
 
     default:
@@ -1287,8 +1313,12 @@ d_name (struct d_info *di)
 	  dc = d_make_comp (di, DEMANGLE_COMPONENT_TEMPLATE, dc,
 			    d_template_args (di));
 	}
-      return dc;
+      break;
     }
+
+  if (d_peek_char (di) == 'B')
+    dc = d_abi_tags (di, dc);
+  return dc;
 }
 
 /* <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E
@@ -3745,6 +3775,7 @@ d_find_pack (struct d_print_info *dpi,
       
     case DEMANGLE_COMPONENT_LAMBDA:
     case DEMANGLE_COMPONENT_NAME:
+    case DEMANGLE_COMPONENT_TAGGED_NAME:
     case DEMANGLE_COMPONENT_OPERATOR:
     case DEMANGLE_COMPONENT_BUILTIN_TYPE:
     case DEMANGLE_COMPONENT_SUB_STD:
@@ -3830,6 +3861,13 @@ d_print_comp (struct d_print_info *dpi, int options,
 	d_print_java_identifier (dpi, dc->u.s_name.s, dc->u.s_name.len);
       return;
 
+    case DEMANGLE_COMPONENT_TAGGED_NAME:
+      d_print_comp (dpi, options, d_left (dc));
+      d_append_string (dpi, "[abi:");
+      d_print_comp (dpi, options, d_right (dc));
+      d_append_char (dpi, ']');
+      return;
+
     case DEMANGLE_COMPONENT_QUAL_NAME:
     case DEMANGLE_COMPONENT_LOCAL_NAME:
       d_print_comp (dpi, options, d_left (dc));