Auto merge of #63029 - petrochenkov:rpass, r=Centril

Move run-pass tests to ui

This is the second attempt at doing https://github.com/rust-lang/rust/pull/53994 (which was previously reverted in https://github.com/rust-lang/rust/pull/54530).

The issue with inability to run the test suite in a faster way (https://github.com/rust-lang/rust/issues/54047) that motivated the revert was recently addressed by https://github.com/rust-lang/rust/pull/61755.

r? @Centril

1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/ui/packed/packed-struct-layout.rs b/src/test/ui/packed/packed-struct-layout.rs
new file mode 100644
index 00000000000..d49c222e648
--- /dev/null
+++ b/src/test/ui/packed/packed-struct-layout.rs
@@ -0,0 +1,28 @@
+// run-pass
+#![allow(dead_code)]
+use std::mem;
+
+#[repr(packed)]
+struct S4 {
+    a: u8,
+    b: [u8; 3],
+}
+
+#[repr(packed)]
+struct S5 {
+    a: u8,
+    b: u32
+}
+
+pub fn main() {
+    unsafe {
+        let s4 = S4 { a: 1, b: [2,3,4] };
+        let transd : [u8; 4] = mem::transmute(s4);
+        assert_eq!(transd, [1, 2, 3, 4]);
+
+        let s5 = S5 { a: 1, b: 0xff_00_00_ff };
+        let transd : [u8; 5] = mem::transmute(s5);
+        // Don't worry about endianness, the u32 is palindromic.
+        assert_eq!(transd, [1, 0xff, 0, 0, 0xff]);
+    }
+}