--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr43419.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,19 @@
+/* { dg-do run } */
+/* { dg-options "-O1" } */
+/* { dg-add-options ieee } */
+#include <math.h>
+
+extern void abort (void);
+void __attribute__((noinline)) f (double x)
+{
+  double pluszero = pow (x, 0.5);
+  double minuszero = sqrt (x);
+  if (signbit (pluszero) == signbit (minuszero))
+    abort ();
+}
+
+int main(void)
+{
+  f (-0.0);
+  return 0;
+}