From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../ui/structs-enums/tag-align-dyn-variants.rs     | 67 ++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 src/test/ui/structs-enums/tag-align-dyn-variants.rs

(limited to 'src/test/ui/structs-enums/tag-align-dyn-variants.rs')

diff --git a/src/test/ui/structs-enums/tag-align-dyn-variants.rs b/src/test/ui/structs-enums/tag-align-dyn-variants.rs
new file mode 100644
index 000000000..4d075b04c
--- /dev/null
+++ b/src/test/ui/structs-enums/tag-align-dyn-variants.rs
@@ -0,0 +1,67 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(deprecated)]
+#![allow(non_snake_case)]
+
+use std::mem;
+
+enum Tag<A,B> {
+    VarA(A),
+    VarB(B),
+}
+
+struct Rec<A,B> {
+    chA: u8,
+    tA: Tag<A,B>,
+    chB: u8,
+    tB: Tag<A,B>,
+}
+
+fn mk_rec<A,B>(a: A, b: B) -> Rec<A,B> {
+    Rec { chA:0, tA:Tag::VarA(a), chB:1, tB:Tag::VarB(b) }
+}
+
+fn is_aligned<A>(amnt: usize, u: &A) -> bool {
+    let p: usize = unsafe { mem::transmute(u) };
+    return (p & (amnt-1)) == 0;
+}
+
+fn variant_data_is_aligned<A,B>(amnt: usize, u: &Tag<A,B>) -> bool {
+    match u {
+      &Tag::VarA(ref a) => is_aligned(amnt, a),
+      &Tag::VarB(ref b) => is_aligned(amnt, b)
+    }
+}
+
+pub fn main() {
+    let u64_align = std::mem::min_align_of::<u64>();
+    let x = mk_rec(22u64, 23u64);
+    assert!(is_aligned(u64_align, &x.tA));
+    assert!(variant_data_is_aligned(u64_align, &x.tA));
+    assert!(is_aligned(u64_align, &x.tB));
+    assert!(variant_data_is_aligned(u64_align, &x.tB));
+
+    let x = mk_rec(22u64, 23u32);
+    assert!(is_aligned(u64_align, &x.tA));
+    assert!(variant_data_is_aligned(u64_align, &x.tA));
+    assert!(is_aligned(u64_align, &x.tB));
+    assert!(variant_data_is_aligned(4, &x.tB));
+
+    let x = mk_rec(22u32, 23u64);
+    assert!(is_aligned(u64_align, &x.tA));
+    assert!(variant_data_is_aligned(4, &x.tA));
+    assert!(is_aligned(u64_align, &x.tB));
+    assert!(variant_data_is_aligned(u64_align, &x.tB));
+
+    let x = mk_rec(22u32, 23u32);
+    assert!(is_aligned(4, &x.tA));
+    assert!(variant_data_is_aligned(4, &x.tA));
+    assert!(is_aligned(4, &x.tB));
+    assert!(variant_data_is_aligned(4, &x.tB));
+
+    let x = mk_rec(22f64, 23f64);
+    assert!(is_aligned(u64_align, &x.tA));
+    assert!(variant_data_is_aligned(u64_align, &x.tA));
+    assert!(is_aligned(u64_align, &x.tB));
+    assert!(variant_data_is_aligned(u64_align, &x.tB));
+}
-- 
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