1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/codegen/to_vec.rs b/src/test/codegen/to_vec.rs
new file mode 100644
index 000000000..60dc4efcb
--- /dev/null
+++ b/src/test/codegen/to_vec.rs
@@ -0,0 +1,10 @@
+// compile-flags: -O
+
+#![crate_type = "lib"]
+
+// CHECK-LABEL: @copy_to_vec
+#[no_mangle]
+fn copy_to_vec(s: &[u64]) -> Vec<u64> {
+  s.to_vec()
+  // CHECK: call void @llvm.memcpy
+}