librustc: Remove visit_tydesc intrinsic.

src/libcore/intrinsics.rs

@@ -327,8 +327,6 @@ extern "rust-intrinsic" {
     /// Returns `true` if a type is managed (will be allocated on the local heap)
     pub fn owns_managed<T>() -> bool;
 
-    pub fn visit_tydesc(td: *const TyDesc, tv: &mut TyVisitor);
-
     /// Calculates the offset from a pointer. The offset *must* be in-bounds of
     /// the object, or one-byte-past-the-end. An arithmetic overflow is also
     /// undefined behaviour.

src/librustc/middle/trans/intrinsic.rs

@@ -307,13 +307,6 @@ pub fn trans_intrinsic_call<'blk, 'tcx>(mut bcx: Block<'blk, 'tcx>, node: ast::N
             let tp_ty = *substs.types.get(FnSpace, 0);
             C_bool(ccx, ty::type_contents(ccx.tcx(), tp_ty).owns_managed())
         }
-        (_, "visit_tydesc") => {
-            let td = *llargs.get(0);
-            let visitor = *llargs.get(1);
-            let td = PointerCast(bcx, td, ccx.tydesc_type().ptr_to());
-            glue::call_visit_glue(bcx, visitor, td);
-            C_nil(ccx)
-        }
         (_, "offset") => {
             let ptr = *llargs.get(0);
             let offset = *llargs.get(1);

src/librustc/middle/typeck/check/mod.rs

@@ -5578,25 +5578,6 @@ pub fn check_intrinsic_type(ccx: &CrateCtxt, it: &ast::ForeignItem) {
                     }
                 }
             },
-            "visit_tydesc" => {
-              let tydesc_ty = match ty::get_tydesc_ty(ccx.tcx) {
-                  Ok(t) => t,
-                  Err(s) => { tcx.sess.span_fatal(it.span, s.as_slice()); }
-              };
-              let region0 = ty::ReLateBound(it.id, ty::BrAnon(0));
-              let region1 = ty::ReLateBound(it.id, ty::BrAnon(1));
-              let visitor_object_ty =
-                    match ty::visitor_object_ty(tcx, region0, region1) {
-                        Ok((_, vot)) => vot,
-                        Err(s) => { tcx.sess.span_fatal(it.span, s.as_slice()); }
-                    };
-
-              let td_ptr = ty::mk_ptr(ccx.tcx, ty::mt {
-                  ty: tydesc_ty,
-                  mutbl: ast::MutImmutable
-              });
-              (0, vec!( td_ptr, visitor_object_ty ), ty::mk_nil())
-            }
             "offset" => {
               (1,
                vec!(