1 files changed, 36 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/builtins-31.c b/gcc/testsuite/gcc.dg/builtins-31.c
new file mode 100644
index 000000000..6e1bda0b7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/builtins-31.c
@@ -0,0 +1,36 @@
+/* Copyright (C) 2004 Free Software Foundation.
+
+   Check that constant folding of signbit, signbitf and signbitl math
+   functions doesn't break anything and produces the expected results.
+
+   Written by Roger Sayle, 28th January 2004.  */
+
+/* { dg-do link } */
+/* { dg-options "-O2" } */
+
+extern void link_error(void);
+
+extern int signbit(double);
+extern int signbitf(float);
+extern int signbitl(long double);
+
+int main()
+{
+  if (signbit (1.0) != 0)
+    link_error ();
+  if (signbit (-2.0) == 0)
+    link_error ();
+
+  if (signbitf (1.0f) != 0)
+    link_error ();
+  if (signbitf (-2.0f) == 0)
+    link_error ();
+
+  if (signbitl (1.0l) != 0)
+    link_error ();
+  if (signbitl (-2.0f) == 0)
+    link_error ();
+
+  return 0;
+}
+