--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr79448.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,21 @@
+/* PR middle-end/79448 - unhelpful -Wformat-truncation=2 warning
+   Verify that there's no warning without optimization.
+   { dg-do compile }
+   { dg-options "-Wall -Wformat -Wformat-truncation=2" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+extern int
+snprintf (char*, size_t, const char*, ...);
+
+char*
+gettext (char*);
+
+char*
+fill (char *buf, size_t len, int count)
+{
+  if (snprintf (buf, len, "%s: %d", gettext ("count"), count) >= len)  /* { dg-bogus "directive output of 2 bytes causes result to exceed .INT_MAX." */
+    return 0;
+
+  return buf;
+}