[COMMITTED 135/146] gccrs: derive(Clone): Mark PhantomData as a lang item

[arthur . cohen]

From: Arthur Cohen <arthur.co...@embecosm.com>

gcc/testsuite/ChangeLog:

        * rust/compile/derive_macro4.rs: Make PhantomData a lang item.
---
 gcc/testsuite/rust/compile/derive_macro4.rs | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/gcc/testsuite/rust/compile/derive_macro4.rs 
b/gcc/testsuite/rust/compile/derive_macro4.rs
index 7802e8fd800..b20043ba927 100644
--- a/gcc/testsuite/rust/compile/derive_macro4.rs
+++ b/gcc/testsuite/rust/compile/derive_macro4.rs
@@ -6,12 +6,9 @@ pub trait Clone {
     fn clone(&self) -> Self;
 }
 
+#[lang = "phantom_data"]
 struct PhantomData<T>;
 
-pub struct AssertParamIsCopy<T: Copy> {
-    _field: PhantomData<T>,
-}
-
 #[derive(Clone)] // { dg-error "bounds not satisfied for U .Copy. is not 
satisfied" }
 union U {
     i: i32,
-- 
2.45.2