1 files changed, 30 insertions, 0 deletions
diff --git a/lib/asan/tests/asan_test_utils.h b/lib/asan/tests/asan_test_utils.h
new file mode 100644
index 000000000000..a4809812dcf0
--- /dev/null
+++ b/lib/asan/tests/asan_test_utils.h
@@ -0,0 +1,30 @@
+//===-- asan_test_utils.h ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ASAN_TEST_UTILS_H
+#define ASAN_TEST_UTILS_H
+
+// Make the compiler think that something is going on there.
+extern "C" void break_optimization(void *);
+
+// This function returns its parameter but in such a way that compiler
+// can not prove it.
+template<class T>
+__attribute__((noinline))
+static T Ident(T t) {
+  T ret = t;
+  break_optimization(&ret);
+  return ret;
+}
+
+#endif  // ASAN_TEST_UTILS_H