also handle memcmp

Author: erikdesjardins

src/test/codegen/slice-ref-equality.rs

@@ -9,7 +9,7 @@
 pub fn is_zero_slice(data: &[u8; 4]) -> bool {
     // CHECK: start:
     // CHECK-NEXT: %{{.+}} = getelementptr {{.+}}
-    // CHECK-NEXT: %[[BCMP:.+]] = tail call i32 @bcmp({{.+}})
+    // CHECK-NEXT: %[[BCMP:.+]] = tail call i32 @{{bcmp|memcmp}}({{.+}})
     // CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[BCMP]], 0
     // CHECK-NEXT: ret i1 %[[EQ]]
     *data == [0; 4]