re PR tree-optimization/27090 (FRE does not look past previous type casts)

2006-06-19  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/27090
	* g++.dg/tree-ssa/pr27090.C: New testcase.

From-SVN: r114786

gcc/testsuite/ChangeLog

+2006-06-19  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/27090
+	* g++.dg/tree-ssa/pr27090.C: New testcase.
+
 2006-06-19  Roger Sayle  <roger@eyesopen.com>
 
 	PR target/27861

gcc/testsuite/g++.dg/tree-ssa/pr27090.C

+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-optimized" } */
+
+template <class T>
+struct Bar
+{
+        int get() { return static_cast<T*>(this)->get2(); }
+};
+struct Foo : public Bar<Foo>
+{
+        int get2() { return x; }
+        int x;
+};
+
+int foo(Foo& f)
+{
+        return f.get();
+}
+
+/* { dg-final { scan-tree-dump "return f->x;" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */