Add regression test for issue 80108

Author: workingjubilee

src/test/ui/wasm/simd-to-array-80108.rs

@@ -0,0 +1,15 @@
+// only-wasm32
+// compile-flags: --crate-type=lib -Copt-level=2
+// build-pass
+#![feature(repr_simd)]
+
+// Regression test for #80108
+
+#[repr(simd)]
+pub struct Vector([i32; 4]);
+
+impl Vector {
+    pub const fn to_array(self) -> [i32; 4] {
+        self.0
+    }
+}