re PR c++/51270 (missed warning about returning reference to temporary)

2017-07-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51270
	* g++.dg/warn/Wreturn-local-addr-3.C: New.

From-SVN: r250140

gcc/testsuite/ChangeLog

+2017-07-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/51270
+	* g++.dg/warn/Wreturn-local-addr-3.C: New.
+
 2017-07-11  Carl Love  <cel@us.ibm.com>
 
 	* gcc.target/powerpc/builtins-2-p9-runnable.c: Add new file with

gcc/testsuite/g++.dg/warn/Wreturn-local-addr-3.C

+// PR c++/51270
+// { dg-options "-O2" }
+
+const int& f(long l)
+{
+  const int& i = l;
+  return i;  // { dg-warning "address of local variable" }
+}