Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/test/ui/mir/ssa-analysis-regression-50041.rs b/src/test/ui/mir/ssa-analysis-regression-50041.rs
new file mode 100644
index 000000000..ebc3e2f8c
--- /dev/null
+++ b/src/test/ui/mir/ssa-analysis-regression-50041.rs
@@ -0,0 +1,36 @@
+// build-pass
+// compile-flags: -Z mir-opt-level=4
+
+#![crate_type = "lib"]
+#![feature(lang_items)]
+#![no_std]
+
+struct NonNull<T: ?Sized>(*const T);
+
+struct Unique<T: ?Sized>(NonNull<T>);
+
+#[lang = "owned_box"]
+pub struct Box<T: ?Sized>(Unique<T>);
+
+impl<T: ?Sized> Drop for Box<T> {
+    fn drop(&mut self) {}
+}
+
+#[lang = "box_free"]
+#[inline(always)]
+unsafe fn box_free<T: ?Sized>(ptr: Unique<T>) {
+    dealloc(ptr.0.0)
+}
+
+#[inline(never)]
+fn dealloc<T: ?Sized>(_: *const T) {}
+
+pub struct Foo<T>(T);
+
+pub fn foo(a: Option<Box<Foo<usize>>>) -> usize {
+    let f = match a {
+        None => Foo(0),
+        Some(vec) => *vec,
+    };
+    f.0
+}