--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/pr65120.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,32 @@
+/* { dg-do compile } */
+/* { dg-options "-Wlogical-not-parentheses" } */
+
+/* Test that we don't warn if rhs is 0 and comparison is == or !=.  */
+
+#ifndef __cplusplus
+#define bool _Bool
+#endif
+
+bool r;
+
+int
+f1 (int a)
+{
+  r = !a == 0;
+  r = !a != 0;
+  r = !a == 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a != 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+}
+
+int
+f2 (int a)
+{
+  r = !a > 0;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a >= 0;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a < 0;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a <= 0;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a > 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a >= 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a < 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+  r = !a <= 1;	/* { dg-warning "logical not is only applied to the left hand side of comparison" } */
+}