re PR debug/21828 (debug info omitted for uninitialized variables)

	PR debug/21828
	* toplev.c (check_global_declarations): Do not mark undefined
	variables as DECL_IGNORED_P.
	* varasm.c (first_global_object_name): GTY it.
	(weak_global_object_name): Likewise.
	(notice_global_symbol): Use ggc_strdup, not xstrdup, when creating
	a string to go into {weak,first}_global_object_name.

	PR debug/21828
	* gcc.dg/debug/dwarf2/dwarf-uninit.c: New test.

From-SVN: r102287

gcc/ChangeLog

+2005-07-22  Mark Mitchell  <mark@codesourcery.com>
+
+	PR debug/21828
+	* toplev.c (check_global_declarations): Do not mark undefined
+	variables as DECL_IGNORED_P.
+	* varasm.c (first_global_object_name): GTY it.
+	(weak_global_object_name): Likewise.
+	(notice_global_symbol): Use ggc_strdup, not xstrdup, when creating
+	a string to go into {weak,first}_global_object_name.
+
 2005-07-22  DJ Delorie  <dj@redhat.com>
 
 	* c-format.c (check_function_format): Change warning control

gcc/testsuite/ChangeLog

+2005-07-22  Mark Mitchell  <mark@codesourcery.com>
+
+	PR debug/21828
+	* gcc.dg/debug/dwarf2/dwarf-uninit.c: New test.
+
 2005-07-22  Diego Novillo  <dnovillo@redhat.com>
 
 	* gcc.dg/tree-ssa/20050719-1.c: New test.

gcc/testsuite/gcc.dg/debug/dwarf2/dwarf-uninit.c

+/* { dg-do compile */
+/* { dg-options "-O2 -gdwarf-2 -dA" } */
+/* { dg-final { scan-assembler "DW_TAG_variable" } } */
+/* PR debug/21828 */
+
+static int i;
+int main() {
+  i += 3;
+  return 0;
+}

gcc/toplev.c

@@ -802,13 +802,6 @@ check_global_declarations (tree *vec, int len)
     {
       decl = vec[i];
 
-      /* Do not emit debug information about variables that are in
-	 static storage, but not defined.  */
-      if (TREE_CODE (decl) == VAR_DECL
-	  && TREE_STATIC (decl)
-	  && !TREE_ASM_WRITTEN (decl))
-	DECL_IGNORED_P (decl) = 1;
- 
       /* Warn about any function
 	 declared static but not defined.
 	 We don't warn about variables,

gcc/varasm.c

@@ -60,6 +60,9 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 #endif
 
 /* The (assembler) name of the first globally-visible object output.  */
+extern GTY(()) const char *first_global_object_name;
+extern GTY(()) const char *weak_global_object_name;
+
 const char *first_global_object_name;
 const char *weak_global_object_name;
 
@@ -1207,11 +1210,11 @@ notice_global_symbol (tree decl)
   if (!*type)
     {
       const char *p;
-      char *name;
+      const char *name;
       rtx decl_rtl = DECL_RTL (decl);
 
       p = targetm.strip_name_encoding (XSTR (XEXP (decl_rtl, 0), 0));
-      name = xstrdup (p);
+      name = ggc_strdup (p);
 
       *type = name;
     }