re PR tree-optimization/38937 (dereferencing pointer '<anonymous>' does break strict-aliasing)

2009-02-02  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/38937
	* g++.dg/warn/Wstrict-aliasing-bogus-escape.C: New testcase.

From-SVN: r143864

gcc/testsuite/ChangeLog

+2009-02-02  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/38937
+	* g++.dg/warn/Wstrict-aliasing-bogus-escape.C: New testcase.
+
 2009-02-01  Paolo Carlini  <paolo.carlini@oracle.com>
 
         PR c++/39053

gcc/testsuite/g++.dg/warn/Wstrict-aliasing-bogus-escape.C

+/* { dg-do compile } */
+/* { dg-options "-O2 -Wstrict-aliasing" } */
+
+#include <string>
+#include <list>
+
+class A;
+
+class B {
+public:
+    void foo(A&);
+    std::string s;
+};
+
+class A {
+public:
+    A& qaz() {
+	l.push_back( new A() );
+	return *l.back();
+    }
+    std::list<A*> l;
+};
+
+void bar()
+{
+  A a;
+  B b;
+  b.foo(a.qaz());
+}
+