--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wtype-limits-no.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,66 @@
+/* Test disabling -Wtype-limits */
+/* { dg-do compile } */
+/* { dg-options "-Wextra -Wno-type-limits" } */
+
+
+void a (unsigned char x)
+{
+  if (x < 0)  return;/* { dg-bogus "comparison is always false due to limited range of data type" } */
+  if (x >= 0) return;/* { dg-bogus "comparison is always true due to limited range of data type" } */
+  if (0 > x)  return;/* { dg-bogus "comparison is always false due to limited range of data type" } */
+  if (0 <= x) return;/* { dg-bogus "comparison is always true due to limited range of data type" } */
+  if (x <= 255) /* { dg-bogus "comparison is always true due to limited range of data type" } */
+    return;
+  if (255 >= x) /* { dg-bogus "comparison is always true due to limited range of data type" } */
+    return;
+  if ((int)x <= 255)
+    return;
+  if (255 >= (unsigned char) 1)
+    return;
+
+}
+
+void b (unsigned short x)
+{
+  if (x < 0)  return;/* { dg-bogus "comparison is always false due to limited range of data type" } */
+  if (x >= 0) return;/* { dg-bogus "comparison is always true due to limited range of data type" } */
+  if (0 > x)  return;/* { dg-bogus "comparison is always false due to limited range of data type" } */
+  if (0 <= x) return;/* { dg-bogus "comparison is always true due to limited range of data type" } */
+}
+
+void c (unsigned int x)
+{
+  if (x < 0)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (x >= 0) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+  if (0 > x)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (0 <= x) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+  if (1U >= 0) return;
+  if (1U < 0) return;
+  if (0 <= 1U) return;
+  if (0 > 1U) return;
+}
+
+void d (unsigned long x)
+{
+  if (x < 0)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (x >= 0) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+  if (0 > x)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (0 <= x) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+}
+
+void e (unsigned long long x)
+{
+  if (x < 0)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (x >= 0) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+  if (0 > x)  return;/* { dg-bogus "comparison of unsigned expression < 0 is always false" } */
+  if (0 <= x) return;/* { dg-bogus "comparison of unsigned expression >= 0 is always true" } */
+}
+
+int test (int x) 
+{
+  if ((long long)x <= 0x123456789ABCLL) 
+    return 1;
+  else 
+    return 0;
+}
+