[Bug bootstrap/51572] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51572

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-16 
13:11:42 UTC ---
We are creating the typedef DIE as limbo as we create it from here:

  /* If TYPE is a typedef type variant, let's generate debug info
     for the parent typedef which TYPE is a type of.  */
  if (typedef_variant_p (type))
    {
      if (TREE_ASM_WRITTEN (type))
        return;

      /* Prevent broken recursion; we can't hand off to the same type.  */
      gcc_assert (DECL_ORIGINAL_TYPE (TYPE_NAME (type)) != type);

      /* Use the DIE of the containing namespace as the parent DIE of
         the type description DIE we want to generate.  */
      if (DECL_CONTEXT (TYPE_NAME (type))
          && TREE_CODE (DECL_CONTEXT (TYPE_NAME (type))) == NAMESPACE_DECL)
        context_die = get_context_die (DECL_CONTEXT (TYPE_NAME (type)));

      TREE_ASM_WRITTEN (type) = 1;

      gen_decl_die (TYPE_NAME (type), NULL, context_die);

and the DECL_CONTEXT of the TYPE_DECL is the translation unit.  Not sure
why we do not immediately using such kind of context here, similar
in the case of is_naming_typedef_decl () below.

Thus, the following fixes it:

Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c     (revision 182398)
+++ gcc/dwarf2out.c     (working copy)
@@ -18842,8 +18849,9 @@ gen_type_die_with_usage (tree type, dw_d

       /* Use the DIE of the containing namespace as the parent DIE of
          the type description DIE we want to generate.  */
-      if (DECL_CONTEXT (TYPE_NAME (type))
-         && TREE_CODE (DECL_CONTEXT (TYPE_NAME (type))) == NAMESPACE_DECL)
+      if (DECL_FILE_SCOPE_P (TYPE_NAME (type))
+         || (DECL_CONTEXT (TYPE_NAME (type))
+             && TREE_CODE (DECL_CONTEXT (TYPE_NAME (type))) ==
NAMESPACE_DECL))
        context_die = get_context_die (DECL_CONTEXT (TYPE_NAME (type)));

       TREE_ASM_WRITTEN (type) = 1;