--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/attr-leaf.c	Tue Jun 15 19:15:29 2021 +0900
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -verify -fsyntax-only %s
+
+void f1() __attribute__((leaf));
+
+void f2() __attribute__((leaf("abc"))); // expected-error {{'leaf' attribute takes no argument}}
+
+int var __attribute__ ((leaf())); // expected-warning {{'leaf' attribute only applies to functions}}
+
+// FIXME: Might diagnose a warning if leaf attribute is used in function definition
+// The leaf attribute has no effect on functions defined within the current compilation unit
+__attribute__((leaf)) void f3() {
+}