[Bug lto/56570] ICE when streaming a TREE_BLOCK

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56570

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-08 12:42:12 UTC ---
We don't even copy the decl with the DECL_DEBUG_EXPR in copy_debug_stmt during
the 2nd inlining!  Because when the decls disappear from local-decls nothing
remaps them and we get into

  else if (TREE_CODE (t) == VAR_DECL
           && !is_global_var (t)
           && !pointer_map_contains (id->decl_map, t))
    /* T is a non-localized variable.  */;

so we absolutely rely on being able to share DECL_DEBUG_EXPR for those!

Thus, the SRA patch is correct and verification should be made even stricter.