diff --git a/src/test/codegen/repeat-trusted-len.rs b/src/test/codegen/repeat-trusted-len.rs
index 43872f15d51e..8b3294281e96 100644
--- a/src/test/codegen/repeat-trusted-len.rs
+++ b/src/test/codegen/repeat-trusted-len.rs
@@ -15,9 +15,14 @@
 
 use std::iter;
 
+// CHECK: @helper([[USIZE:i[0-9]+]] %arg0)
+#[no_mangle]
+pub fn helper(_: usize) {
+}
+
 // CHECK-LABEL: @repeat_take_collect
 #[no_mangle]
 pub fn repeat_take_collect() -> Vec<u8> {
-// CHECK: call void @llvm.memset.p0i8
+// CHECK: call void @llvm.memset.p0i8.[[USIZE]](i8* {{(nonnull )?}}%{{[0-9]+}}, i8 42, [[USIZE]] 100000, i32 1, i1 false)
     iter::repeat(42).take(100000).collect()
 }