reviewers changes

Author: SadiinsoSnowfall

tests/codegen/issues/issue-112169.rs renamed to tests/codegen/issues/issue-112169-long-iterator-unroll.rs

@@ -1,19 +1,14 @@
-//@ compile-flags: -O
+//@ compile-flags: -O -Z mir-opt-level=4
 #![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: define{{.*}}i32 @issue_112169(){{.*}}{
+// CHECK-LABEL: issue_112169()
 #[no_mangle]
 pub fn issue_112169() -> i32 {
-    // CHECK-NOT: icmp
-    // CHECK-NOT: add
-    // CHECK-NOT: br
-    // CHECK: ret i32 102
-    // CHECK-NOT: icmp
-    // CHECK-NOT: add
-    // CHECK-NOT: br
+    // CHECK-NEXT: {{.*}}:
+    // CHECK-NEXT: ret i32 102
     let mut s = 0;
 
     for i in 0..102 {