--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/compiler-rt/test/dfsan/basic.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,28 @@
+// RUN: %clang_dfsan %s -o %t && %run %t
+// RUN: %clang_dfsan -mllvm -dfsan-args-abi %s -o %t && %run %t
+
+// Tests that labels are propagated through loads and stores.
+
+#include <sanitizer/dfsan_interface.h>
+#include <assert.h>
+
+int main(void) {
+  int i = 1;
+  dfsan_label i_label = dfsan_create_label("i", 0);
+  dfsan_set_label(i_label, &i, sizeof(i));
+
+  dfsan_label new_label = dfsan_get_label(i);
+  assert(i_label == new_label);
+
+  dfsan_label read_label = dfsan_read_label(&i, sizeof(i));
+  assert(i_label == read_label);
+
+  dfsan_label j_label = dfsan_create_label("j", 0);
+  dfsan_add_label(j_label, &i, sizeof(i));
+
+  read_label = dfsan_read_label(&i, sizeof(i));
+  assert(dfsan_has_label(read_label, i_label));
+  assert(dfsan_has_label(read_label, j_label));
+
+  return 0;
+}