1 files changed, 12 insertions, 0 deletions
diff --git a/tests/codegen/vec-optimizes-away.rs b/tests/codegen/vec-optimizes-away.rs
new file mode 100644
index 000000000..9143fad23
--- /dev/null
+++ b/tests/codegen/vec-optimizes-away.rs
@@ -0,0 +1,12 @@
+// ignore-debug: the debug assertions get in the way
+// no-system-llvm
+// compile-flags: -O
+#![crate_type="lib"]
+
+#[no_mangle]
+pub fn sum_me() -> i32 {
+    // CHECK-LABEL: @sum_me
+    // CHECK-NEXT: {{^.*:$}}
+    // CHECK-NEXT: ret i32 6
+    vec![1, 2, 3].iter().sum::<i32>()
+}