--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/stack-check-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,66 @@
+/* The goal here is to ensure that we never consider a call to a noreturn
+   function as a potential tail call.
+
+   Right now GCC discovers potential tail calls by looking at the
+   predecessors of the exit block.  A call to a non-return function
+   has no successors and thus can never match that first filter.
+
+   But that could change one day and we want to catch it.  The problem
+   is the compiler could potentially optimize a tail call to a nonreturn
+   function, even if the caller has a frame.  That breaks the assumption
+   that calls probe *sp when saving the return address that some targets
+   depend on to elide stack probes.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fstack-clash-protection -fdump-tree-tailc -fdump-tree-optimized" } */
+/* { dg-require-effective-target supports_stack_clash_protection } */
+
+extern void foo (void) __attribute__ ((__noreturn__));
+
+
+void
+test_direct_1 (void)
+{
+  foo ();
+}
+
+void
+test_direct_2 (void)
+{
+  return foo ();
+}
+
+void (*indirect)(void)__attribute__ ((noreturn));
+
+
+void
+test_indirect_1 ()
+{
+  (*indirect)();
+}
+
+void
+test_indirect_2 (void)
+{
+  return (*indirect)();;
+}
+
+
+typedef void (*pvfn)() __attribute__ ((noreturn));
+
+void (*indirect_casted)(void);
+
+void
+test_indirect_casted_1 ()
+{
+  (*(pvfn)indirect_casted)();
+}
+
+void
+test_indirect_casted_2 (void)
+{
+  return (*(pvfn)indirect_casted)();
+}
+/* { dg-final { scan-tree-dump-not "tail call" "tailc" } } */
+/* { dg-final { scan-tree-dump-not "tail call" "optimized" } } */
+