[PATCH PING] c++-specific bits of tree-slimming patches

[Richard Guenther]

On Thu, 14 Apr 2011, Nathan Froyd wrote:

> On Fri, Apr 08, 2011 at 01:50:24PM -0400, Jason Merrill wrote:
> > On 03/24/2011 09:15 AM, Nathan Froyd wrote:
> >> +  tree t = make_node (CASE_LABEL_EXPR);
> >> +
> >> +  TREE_TYPE (t) = void_type_node;
> >> +  SET_EXPR_LOCATION (t, input_location);
> >
> > As jsm and richi said, using input_location like this is a regression.  
> > Can we use DECL_SOURCE_LOCATION (label_decl) instead?
> 
> Sure.  Joseph, Richi, are you happy with that change?  It would fix the
> C/C++ regression, as c_add_case_label does:
> 
>   /* Create the LABEL_DECL itself.  */
>   label = create_artificial_label (loc);
>   ...
>   /* Add a CASE_LABEL to the statement-tree.  */
>   case_label = add_stmt (build_case_label (loc, low_value, high_value, label));
> 
> so the DECL_SOURCE_LOCATION would be the same as the location_t we were
> passing in anyway.  For the other languages, I think it would be neutral
> or an improvement (they all use input_location or UNKNOWN_LOCATION for
> the CASE_LABEL anyway).

Yes, using DECL_SOURCE_LOCATION (label_decl) sounds like the correct
thing.

Richard.