Rollup merge of #143303 - Kivooeo:tf28, r=tgross35

`tests/ui`: A New Order [28/28] FINAL PART

> [!NOTE]
>
> Intermediate commits are intended to help review, but will be squashed prior to merge.

Some `tests/ui/` housekeeping, to trim down number of tests directly under `tests/ui/`. Part of rust-lang/rust#133895.

r? ``@tgross35``

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/ui/traits/virtual-call-parameter-handling.rs b/tests/ui/traits/virtual-call-parameter-handling.rs
new file mode 100644
index 00000000000..71ed459d15a
--- /dev/null
+++ b/tests/ui/traits/virtual-call-parameter-handling.rs
@@ -0,0 +1,47 @@
+//! This test checks the correct parameter handling during virtual method calls
+//! through a `dyn Trait` object.
+//!
+//! Regression test for: <https://github.com/rust-lang/rust/issues/137646>
+
+//@ run-pass
+
+use std::hint::black_box;
+
+type T = (i32, i32, i32);
+
+pub trait Trait {
+    fn m(&self, _: T, _: T) {}
+}
+
+impl Trait for () {
+    fn m(&self, mut _v1: T, v2: T) {
+        _v1 = (0, 0, 0);
+        check(v2);
+    }
+}
+
+pub fn run_1(trait_: &dyn Trait) {
+    let v1 = (1, 1, 1);
+    let v2 = (1, 1, 1);
+    trait_.m(v1, v2);
+}
+
+pub fn run_2(trait_: &dyn Trait) {
+    let v1 = (1, 1, 1);
+    let v2 = (1, 1, 1);
+    trait_.m(v1, v2);
+    check(v1);
+    check(v2);
+}
+
+#[inline(never)]
+fn check(v: T) {
+    assert_eq!(v, (1, 1, 1));
+}
+
+fn main() {
+    black_box(run_1 as fn(&dyn Trait));
+    black_box(run_2 as fn(&dyn Trait));
+    run_1(&());
+    run_2(&());
+}