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

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/codegen-llvm/nrvo.rs b/tests/codegen-llvm/nrvo.rs
new file mode 100644
index 00000000000..7972186bfe5
--- /dev/null
+++ b/tests/codegen-llvm/nrvo.rs
@@ -0,0 +1,17 @@
+//@ compile-flags: -Copt-level=3
+
+#![crate_type = "lib"]
+
+// Ensure that we do not call `memcpy` for the following function.
+// `memset` and `init` should be called directly on the return pointer.
+#[no_mangle]
+pub fn nrvo(init: fn(&mut [u8; 4096])) -> [u8; 4096] {
+    // CHECK-LABEL: nrvo
+    // CHECK: @llvm.memset
+    // FIXME: turn on nrvo then check-not: @llvm.memcpy
+    // CHECK: ret
+    // CHECK-EMPTY
+    let mut buf = [0; 4096];
+    init(&mut buf);
+    buf
+}