diff --git a/tests/ui/mir/alignment/misaligned-constant-gvn.rs b/tests/ui/mir/alignment/misaligned-constant-gvn.rs
new file mode 100644
index 00000000000..363d5c0ed34
--- /dev/null
+++ b/tests/ui/mir/alignment/misaligned-constant-gvn.rs
@@ -0,0 +1,8 @@
+//@ build-pass
+//@ compile-flags: -Zmir-opt-level=0 -Zmir-enable-passes=+GVN
+
+fn main() {
+    let variant: Option<u32> = None;
+    let transmuted: u64 = unsafe { std::mem::transmute(variant) };
+    println!("{transmuted}");
+}