1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/layout/thumb-enum.rs b/tests/ui/layout/thumb-enum.rs
new file mode 100644
index 000000000..3b43b1b83
--- /dev/null
+++ b/tests/ui/layout/thumb-enum.rs
@@ -0,0 +1,34 @@
+// compile-flags: --target thumbv8m.main-none-eabihf
+// needs-llvm-components: arm
+//
+// Verify that thumb targets implement the repr(C) for enums correctly.
+//
+// See #87917
+#![feature(never_type, rustc_attrs, no_core, lang_items)]
+#![crate_type = "lib"]
+#![no_core]
+
+#[lang="sized"]
+trait Sized {}
+
+#[rustc_layout(debug)]
+#[repr(C)]
+enum A { Apple } //~ ERROR: layout_of
+
+#[rustc_layout(debug)]
+#[repr(C)]
+enum B { Banana = 255, } //~ ERROR: layout_of
+
+#[rustc_layout(debug)]
+#[repr(C)]
+enum C { Chaenomeles = 256, } //~ ERROR: layout_of
+
+#[rustc_layout(debug)]
+#[repr(C)]
+enum P { Peach = 0x1000_0000isize, } //~ ERROR: layout_of
+
+const TANGERINE: usize = 0x8100_0000; // hack to get negative numbers without negation operator!
+
+#[rustc_layout(debug)]
+#[repr(C)]
+enum T { Tangerine = TANGERINE as isize } //~ ERROR: layout_of