1 files changed, 12 insertions, 0 deletions
diff --git a/tests/codegen-llvm/vec-optimizes-away.rs b/tests/codegen-llvm/vec-optimizes-away.rs
new file mode 100644
index 00000000000..93b55454b10
--- /dev/null
+++ b/tests/codegen-llvm/vec-optimizes-away.rs
@@ -0,0 +1,12 @@
+//@ compile-flags: -Copt-level=3
+#![crate_type = "lib"]
+
+#[no_mangle]
+pub fn sum_me() -> i32 {
+    // CHECK-LABEL: @sum_me
+    // CHECK-NEXT: {{^.*:$}}
+    // CHECK-NEXT: ; call __rustc::__rust_no_alloc_shim_is_unstable_v2
+    // CHECK-NEXT: tail call void @_R{{.+}}__rust_no_alloc_shim_is_unstable_v2()
+    // CHECK-NEXT: ret i32 6
+    vec![1, 2, 3].iter().sum::<i32>()
+}