diff --git a/tests/codegen-llvm/lib-optimizations/append-elements.rs b/tests/codegen-llvm/lib-optimizations/append-elements.rs
index b8657104d6653..66315b46ba7a6 100644
--- a/tests/codegen-llvm/lib-optimizations/append-elements.rs
+++ b/tests/codegen-llvm/lib-optimizations/append-elements.rs
@@ -9,11 +9,11 @@
 //! zero-capacity length flowing into the memcpy arguments.
 
 // CHECK-LABEL: @vec_append_with_temp_alloc
-// CHECK-SAME: ptr{{.*}}[[DST:%[a-z]+]]{{.*}}ptr{{.*}}[[SRC:%[a-z]+]]
+// CHECK-SAME: (ptr {{[^%]+}}%[[DST:[a-z0-9._]+]], ptr {{[^%]+}}%[[SRC:[a-z0-9._]+]],
 #[no_mangle]
 pub fn vec_append_with_temp_alloc(dst: &mut Vec<u8>, src: &[u8]) {
     // CHECK-NOT: call void @llvm.memcpy
-    // CHECK: call void @llvm.memcpy.{{.*}}[[DST]].i{{.*}}[[SRC]]
+    // CHECK: call void @llvm.memcpy.{{.*}}ptr {{.*}}, ptr {{.*}}%[[SRC]]
     // CHECK-NOT: call void @llvm.memcpy
     let temp = src.to_vec();
     dst.extend(&temp);
@@ -21,11 +21,11 @@ pub fn vec_append_with_temp_alloc(dst: &mut Vec<u8>, src: &[u8]) {
 }
 
 // CHECK-LABEL: @string_append_with_temp_alloc
-// CHECK-SAME: ptr{{.*}}[[DST:%[a-z]+]]{{.*}}ptr{{.*}}[[SRC:%[a-z]+]]
+// CHECK-SAME: (ptr {{[^%]+}}%[[DST:[a-z0-9._]+]], ptr {{[^%]+}}%[[SRC:[a-z0-9._]+]],
 #[no_mangle]
 pub fn string_append_with_temp_alloc(dst: &mut String, src: &str) {
     // CHECK-NOT: call void @llvm.memcpy
-    // CHECK: call void @llvm.memcpy.{{.*}}[[DST]].i{{.*}}[[SRC]]
+    // CHECK: call void @llvm.memcpy.{{.*}}ptr {{.*}}, ptr {{.*}}%[[SRC]]
     // CHECK-NOT: call void @llvm.memcpy
     let temp = src.to_string();
     dst.push_str(&temp);