From fb5f05e0ef160db96030051a5cb53e2e7867bacc Mon Sep 17 00:00:00 2001
From: SadiinsoSnowfall <sadiinso@gmail.com>
Date: Tue, 23 Apr 2024 00:26:05 +0200
Subject: [PATCH] Added codegen test for issue 112169

---
 .../issue-112169-long-iterator-unroll.rs      | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 tests/codegen/issues/issue-112169-long-iterator-unroll.rs

diff --git a/tests/codegen/issues/issue-112169-long-iterator-unroll.rs b/tests/codegen/issues/issue-112169-long-iterator-unroll.rs
new file mode 100644
index 0000000000000..54e2f0d928ea5
--- /dev/null
+++ b/tests/codegen/issues/issue-112169-long-iterator-unroll.rs
@@ -0,0 +1,24 @@
+//@ compile-flags: -O
+//@ ignore-wasm FIXME: LLVM does not vectorize loops on WASM so this doesn't get optimized
+#![crate_type = "lib"]
+
+// Test that simple iterator-based loops of length > 101 are fully optimized away.
+// See <https://github.com/rust-lang/rust/issues/112169>
+
+// CHECK-LABEL: issue_112169()
+#[no_mangle]
+pub fn issue_112169() -> i32 {
+    // CHECK-NEXT: {{.*}}:
+    // CHECK-NEXT: ret i32 102
+    let mut s = 0;
+
+    for i in 0..102 {
+        if i == 0 {
+            s = i;
+        }
+
+        s += 1;
+    }
+
+    s
+}