[Bug lto/52178] [4.7 regression] Ada bootstrap failure in LTO mode

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52178

--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-13 14:21:57 UTC ---
> Which should avoid the issue.  But I suppose that variably_modified_type_p
> wrongly checks
> 
>             if (TREE_CODE (type) == QUAL_UNION_TYPE)
>               RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t));
> 
> ?  It seems it should not look at DECL_QUALIFIER at all.

I wouldn't disagree, but I think we should only tweak free_lang_data and
subsequent passes for 4.7.