rollup merge of rust-lang#19457: reem/remove-is-lang-item

Removes a FIXME on closed issue rust-lang#15064. This flag is no
longer needed or used since reflection is gone.

Author: alexcrichton

src/librustc_trans/trans/base.rs

@@ -983,23 +983,14 @@ pub fn invoke<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
                           llfn: ValueRef,
                           llargs: &[ValueRef],
                           fn_ty: Ty<'tcx>,
-                          call_info: Option<NodeInfo>,
-                          // FIXME(15064) is_lang_item is a horrible hack, please remove it
-                          // at the soonest opportunity.
-                          is_lang_item: bool)
+                          call_info: Option<NodeInfo>)
                           -> (ValueRef, Block<'blk, 'tcx>) {
     let _icx = push_ctxt("invoke_");
     if bcx.unreachable.get() {
         return (C_null(Type::i8(bcx.ccx())), bcx);
     }
 
-    // FIXME(15064) Lang item methods may (in the reflect case) not have proper
-    // types, so doing an attribute lookup will fail.
-    let attributes = if is_lang_item {
-        llvm::AttrBuilder::new()
-    } else {
-        get_fn_llvm_attributes(bcx.ccx(), fn_ty)
-    };
+    let attributes = get_fn_llvm_attributes(bcx.ccx(), fn_ty);
 
     match bcx.opt_node_id {
         None => {

src/librustc_trans/trans/callee.rs

@@ -779,8 +779,7 @@ pub fn trans_call_inner<'a, 'blk, 'tcx, F>(bcx: Block<'blk, 'tcx>,
                                       llfn,
                                       llargs[],
                                       callee_ty,
-                                      call_info,
-                                      dest.is_none());
+                                      call_info);
         bcx = b;
         llresult = llret;
 

src/librustc_trans/trans/glue.rs

@@ -292,7 +292,7 @@ fn trans_struct_drop<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
                                      class_did,
                                      &[get_drop_glue_type(bcx.ccx(), t)],
                                      ty::mk_nil(bcx.tcx()));
-        let (_, variant_cx) = invoke(variant_cx, dtor_addr, args[], dtor_ty, None, false);
+        let (_, variant_cx) = invoke(variant_cx, dtor_addr, args[], dtor_ty, None);
 
         variant_cx.fcx.pop_and_trans_custom_cleanup_scope(variant_cx, field_scope);
         variant_cx