From c975e16b9ac018952f4aac53fb19708cb87d779b Mon Sep 17 00:00:00 2001
From: Max Fan <git@max.fan>
Date: Thu, 12 Jan 2023 17:04:30 -0500
Subject: [PATCH] Add regression test for #97217

Closes #97217.
---
 tests/codegen/issue-97217.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/codegen/issue-97217.rs

diff --git a/tests/codegen/issue-97217.rs b/tests/codegen/issue-97217.rs
new file mode 100644
index 0000000000000..47bda88392986
--- /dev/null
+++ b/tests/codegen/issue-97217.rs
@@ -0,0 +1,21 @@
+// compile-flags: -C opt-level=3
+// ignore-debug: the debug assertions get in the way
+#![crate_type = "lib"]
+
+// Regression test for issue 97217 (the following should result in no allocations)
+
+// CHECK-LABEL: @issue97217
+#[no_mangle]
+pub fn issue97217() -> i32 {
+    // drop_in_place should be inlined and never appear
+    // CHECK-NOT: drop_in_place
+    
+    // __rust_alloc should be optimized out
+    // CHECK-NOT: __rust_alloc
+    
+    let v1 = vec![5, 6, 7];
+    let v1_iter = v1.iter();
+    let total: i32 = v1_iter.sum();
+    println!("{}",total);
+    total
+}