[Bug debug/53470] [4.8 Regression] ICE when linking with -g in splice_child_die, at dwarf2out.c:4264

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53470

--- Comment #12 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-11 
12:54:50 UTC ---
It seems we never come along with a DECL_CONTEXT that is a BLOCK (nor does
the C++ frontend do that ...).  Replacing the TYPE_CONTEXT clearing with

  if (TYPE_CONTEXT (type)
      && TREE_CODE (TYPE_CONTEXT (type)) == BLOCK)
    {
      tree ctx = TYPE_CONTEXT (type);
      do
        {
          ctx = BLOCK_SUPERCONTEXT (ctx);
        }
      while (ctx && TREE_CODE (ctx) == BLOCK);
      TYPE_CONTEXT (type) = ctx;
    }

thus, replace a BLOCK context with the first non-BLOCK context, works.