1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/attr-returns_twice-1.c b/gcc/testsuite/gcc.dg/attr-returns_twice-1.c
new file mode 100644
index 00000000000..9eb082f4b03
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-returns_twice-1.c
@@ -0,0 +1,23 @@
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-W" } */
+
+int newsetjmp(void) __attribute__((returns_twice));
+void g(int);
+
+int
+main (void)
+{
+  register int reg asm ("esi") = 1; /* { dg-warning "might be clobbered" "" } */
+
+  if (!newsetjmp ())
+    {
+      reg = 2;
+      g (reg);
+    }
+  else
+    {
+      g (reg);
+    }
+
+  return 0;
+}