add a run test to check all sorts of argument passing

and panic catches

Author: nagisa

tests/ui/abi/rust-preserve-none-cc.rs

@@ -0,0 +1,62 @@
+//@ run-pass
+//@ needs-unwind
+
+#![feature(rust_preserve_none_cc)]
+
+struct CrateOf<'a> {
+    mcintosh: f64,
+    golden_delicious: u64,
+    jonagold: Option<&'a u64>,
+    rome: [u64; 12],
+}
+
+#[inline(never)]
+extern "rust-preserve-none" fn oven_explosion() {
+    panic!("bad time");
+}
+
+#[inline(never)]
+fn bite_into(yummy: u64) -> u64 {
+    let did_it_actually = std::panic::catch_unwind(move || {
+        oven_explosion()
+    });
+    assert!(did_it_actually.is_err());
+    yummy - 25
+}
+
+#[inline(never)]
+extern "rust-preserve-none" fn lotsa_apples(
+    honeycrisp: u64,
+    gala: u32,
+    fuji: f64,
+    granny_smith: &[u64],
+    pink_lady: (),
+    and_a: CrateOf<'static>,
+    cosmic_crisp: u64,
+    ambrosia: f64,
+    winesap: &[u64],
+) -> (u64, f64, u64, u64) {
+    assert_eq!(honeycrisp, 220);
+    assert_eq!(gala, 140);
+    assert_eq!(fuji, 210.54201234);
+    assert_eq!(granny_smith, &[180, 210]);
+    assert_eq!(pink_lady, ());
+    assert_eq!(and_a.mcintosh, 150.0);
+    assert_eq!(and_a.golden_delicious, 185);
+    assert_eq!(and_a.jonagold, None); // my scales can't weight these gargantuans.
+    assert_eq!(and_a.rome, [180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202]);
+    assert_eq!(cosmic_crisp, 270);
+    assert_eq!(ambrosia, 193.1);
+    assert_eq!(winesap, &[]);
+    (and_a.rome.iter().sum(), fuji + ambrosia, cosmic_crisp - honeycrisp, bite_into(and_a.golden_delicious))
+}
+
+fn main() {
+    let pie = lotsa_apples(220, 140, 210.54201234, &[180, 210], (), CrateOf {
+        mcintosh: 150.0,
+        golden_delicious: 185,
+        jonagold: None,
+        rome: [180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202]
+    }, 270, 193.1, &[]);
+    assert_eq!(pie, (2292, 403.64201234, 50, 160));
+}