--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/warn/pr13358-3.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,24 @@
+// PR c++/13358: g++ should accept a long long constant sans LL suffix
+// if -Wno-long-long is in use
+// { dg-do compile { target c++11 } }
+// { dg-require-effective-target int32plus } 
+// { dg-options "-pedantic-errors" }
+
+
+void use_longlong ()
+{
+  unsigned long long x1, x2, x3; 
+  // make sure it's ok with hex, decimal and octal
+  x1 = 0x1b27da572ef3cd86;
+  x2 = 1956772631100509574;
+  x3 = 0154476645345674746606;
+}
+
+void use_longlong2 ()
+{
+  unsigned long long x1, x2, x3; 
+  // make sure it's ok with hex, decimal and octal
+  x1 = 0x1b27da572ef3cd86LL;
+  x2 = 1956772631100509574LL;
+  x3 = 0154476645345674746606LL;
+}