Rename `tests/codegen` into `tests/codegen-llvm`

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/codegen-llvm/maybeuninit-rvo.rs b/tests/codegen-llvm/maybeuninit-rvo.rs
new file mode 100644
index 00000000000..097aa610f1b
--- /dev/null
+++ b/tests/codegen-llvm/maybeuninit-rvo.rs
@@ -0,0 +1,34 @@
+//@ compile-flags: -Copt-level=3
+//@ needs-unwind
+#![feature(c_unwind)]
+#![crate_type = "lib"]
+
+pub struct Foo([u8; 1000]);
+
+extern "C" {
+    fn init(p: *mut Foo);
+}
+
+pub fn new_from_uninit() -> Foo {
+    // CHECK-LABEL: new_from_uninit
+    // CHECK-NOT: call void @llvm.memcpy.
+    let mut x = std::mem::MaybeUninit::uninit();
+    unsafe {
+        init(x.as_mut_ptr());
+        x.assume_init()
+    }
+}
+
+extern "C-unwind" {
+    fn init_unwind(p: *mut Foo);
+}
+
+pub fn new_from_uninit_unwind() -> Foo {
+    // CHECK-LABEL: new_from_uninit_unwind
+    // CHECK-NOT: call void @llvm.memcpy.
+    let mut x = std::mem::MaybeUninit::uninit();
+    unsafe {
+        init_unwind(x.as_mut_ptr());
+        x.assume_init()
+    }
+}