1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/simd/issue-39720.rs b/src/test/ui/simd/issue-39720.rs
new file mode 100644
index 000000000..8cf841f93
--- /dev/null
+++ b/src/test/ui/simd/issue-39720.rs
@@ -0,0 +1,22 @@
+// run-pass
+// ignore-emscripten FIXME(#45351)
+
+#![feature(repr_simd, platform_intrinsics)]
+
+#[repr(simd)]
+#[derive(Copy, Clone, Debug)]
+pub struct Char3(pub i8, pub i8, pub i8);
+
+#[repr(simd)]
+#[derive(Copy, Clone, Debug)]
+pub struct Short3(pub i16, pub i16, pub i16);
+
+extern "platform-intrinsic" {
+    fn simd_cast<T, U>(x: T) -> U;
+}
+
+fn main() {
+    let cast: Short3 = unsafe { simd_cast(Char3(10, -3, -9)) };
+
+    println!("{:?}", cast);
+}