[gccrs COMMIT 3/3] lang-items: Register freeze

[gerris.rs@gmail.com]

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

gcc/rust/ChangeLog:

	* util/rust-lang-item.h: Add enum value for Freeze.
	* util/rust-lang-item.cc: Register it.

gcc/testsuite/ChangeLog:

	* rust/compile/freeze-lang-item.rs: New test.
---
This change was merged into the gccrs repository and is posted here for
upstream visibility and potential drive-by review, as requested by GCC
release managers.
Each commit email contains a link to its details on github from where you can
find the Pull-Request and associated discussions.


Commit on github: https://github.com/Rust-GCC/gccrs/commit/4667188af37c2a484dca82435cade18aa7ae59cd

The commit has NOT been mentioned in any issue.

The commit has been mentioned in the following pull-request(s):
 - https://github.com/Rust-GCC/gccrs/pull/4770

 gcc/rust/util/rust-lang-item.cc               |  1 +
 gcc/rust/util/rust-lang-item.h                |  1 +
 .../rust/compile/freeze-lang-item.rs          | 25 +++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/freeze-lang-item.rs

diff --git a/gcc/rust/util/rust-lang-item.cc b/gcc/rust/util/rust-lang-item.cc
index e7bcc8f8e..a2b919264 100644
--- a/gcc/rust/util/rust-lang-item.cc
+++ b/gcc/rust/util/rust-lang-item.cc
@@ -65,6 +65,7 @@ const BiMap<std::string, LangItem::Kind> Rust::LangItem::lang_items = {{
   {"clone", Kind::CLONE},
   {"drop", Kind::DROP},
   {"sized", Kind::SIZED},
+  {"freeze", Kind::FREEZE},
   {"sync", Kind::SYNC},
   {"slice_alloc", Kind::SLICE_ALLOC},
   {"slice_u8_alloc", Kind::SLICE_U8_ALLOC},
diff --git a/gcc/rust/util/rust-lang-item.h b/gcc/rust/util/rust-lang-item.h
index c1fd45d04..317f17a2b 100644
--- a/gcc/rust/util/rust-lang-item.h
+++ b/gcc/rust/util/rust-lang-item.h
@@ -93,6 +93,7 @@ public:
     CLONE,
     DROP,
     SIZED,
+    FREEZE,
     SYNC,
 
     // https://github.com/Rust-GCC/gccrs/issues/1896
diff --git a/gcc/testsuite/rust/compile/freeze-lang-item.rs b/gcc/testsuite/rust/compile/freeze-lang-item.rs
new file mode 100644
index 000000000..d61df798d
--- /dev/null
+++ b/gcc/testsuite/rust/compile/freeze-lang-item.rs
@@ -0,0 +1,25 @@
+#![feature(no_core)]
+#![feature(optin_builtin_traits)]
+#![feature(negative_impls)]
+#![feature(lang_items)]
+#![feature(rustc_attrs)]
+#![no_core]
+
+#[lang = "sized"]
+trait Sized {}
+
+#[lang = "freeze"]
+pub(crate) unsafe auto trait Freeze {}
+
+#[lang = "phantom_data"]
+pub struct PhantomData<T>;
+
+pub struct UnsafeCell<T>(T);
+
+impl<T: ?Sized> !Freeze for UnsafeCell<T> {}
+unsafe impl<T: ?Sized> Freeze for PhantomData<T> {}
+unsafe impl<T: ?Sized> Freeze for *const T {}
+unsafe impl<T: ?Sized> Freeze for *mut T {}
+unsafe impl<T: ?Sized> Freeze for &T {}
+unsafe impl<T: ?Sized> Freeze for &mut T {}
+
-- 
2.54.0