--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/uninit-15.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,26 @@
+/* PR tree-optimization/17506
+   We issue an uninitialized variable warning at a wrong location at
+   line 11, which is very confusing.  Make sure we print out a note to
+   make it less confusing.  (not xfailed alternative)
+   But it is of course ok if we warn in bar about uninitialized use
+   of j.  (xfailed alternative)  */
+/* { dg-do compile } */
+/* { dg-options "-O1 -Wuninitialized" } */
+
+inline int
+foo (int i)
+{
+  if (i) /* { dg-warning "used uninitialized in this function" } */
+    return 1;
+  return 0;
+}
+
+void baz (void);
+
+void
+bar (void)
+{
+  int j; /* { dg-message "note: 'j' was declared here" } */
+  for (; foo (j); ++j)  /* { dg-warning "'j' is used uninitialized" "" { xfail *-*-* } } */
+    baz ();
+}