diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cf14bb02a9fb..ce9a32015a11 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2007-02-07  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* gcc.dg/builtins-20.c: Add some -~ complex cases.
+
 2007-02-07  Hans-Peter Nilsson  <hp@axis.com>
 
 	* lib/target-supports.exp (check_effective_target_simulator): New. 
diff --git a/gcc/testsuite/gcc.dg/builtins-20.c b/gcc/testsuite/gcc.dg/builtins-20.c
index 7088075511c5..9df23c4eb600 100644
--- a/gcc/testsuite/gcc.dg/builtins-20.c
+++ b/gcc/testsuite/gcc.dg/builtins-20.c
@@ -215,6 +215,12 @@ void test2(double x, double y)
 
   if (ccos(tan(x)+sin(x-y)*1i) != ccos(-tan(-x)-sin(y-x)*1i))
     link_error ();
+
+  if (-5+x*1i != -~(5+x*1i))
+    link_error ();
+
+  if (tan(x)+tan(y)*1i != -~(tan(-x)+tan(y)*1i))
+    link_error ();
 }
 
 void test3(__complex__ double x, __complex__ double y, int i)
@@ -434,6 +440,12 @@ void test2f(float x, float y)
 
   if (ccosf(tanf(x)+sinf(x-y)*1i) != ccosf(-tanf(-x)-sinf(y-x)*1i))
     link_error ();
+
+  if (-5+x*1i != -~(5+x*1i))
+    link_error ();
+
+  if (tanf(x)+tanf(y)*1i != -~(tanf(-x)+tanf(y)*1i))
+    link_error ();
 }
 
 void test3f(__complex__ float x, __complex__ float y, int i)
@@ -653,6 +665,12 @@ void test2l(long double x, long double y)
 
   if (ccosl(tanl(x)+sinl(x-y)*1i) != ccosl(-tanl(-x)-sinl(y-x)*1i))
     link_error ();
+
+  if (-5+x*1i != -~(5+x*1i))
+    link_error ();
+
+  if (tanl(x)+tanl(y)*1i != -~(tanl(-x)+tanl(y)*1i))
+    link_error ();
 }
 
 void test3l(__complex__ long double x, __complex__ long double y, int i)