re PR rtl-optimization/23299 ("classic" GCSE caused miscompilation)

	PR rtl-optimization/23299
	* g++.dg/opt/pr23299.C: New test.

From-SVN: r103148

gcc/testsuite/ChangeLog

+2005-08-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/23299
+	* g++.dg/opt/pr23299.C: New test.
+
 2005-08-15  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* gcc.dg/special/weak-1.c: xfail 32-bit hppa*-*-hpux*.

gcc/testsuite/g++.dg/opt/pr23299.C

+// PR rtl-optimization/23299
+// { dg-do run }
+// { dg-options "-Os" }
+
+extern "C" void abort ();
+
+struct A
+{
+  virtual int a () {}
+};
+struct B : public A
+{
+  virtual int b () {}
+};
+struct C : public A
+{
+  virtual int c () {}
+};
+struct D
+{
+  D () { d = 64; }
+  ~D ();
+  int d;
+};
+
+int x;
+D::~D ()
+{
+  x |= 1;
+  if (d != 64)
+    abort ();
+}
+
+struct E : public B, public C
+{
+  E () {}
+  virtual int c ();
+  ~E ();
+  D dv;
+};
+
+E::~E ()
+{
+  int r = c ();
+}
+
+int
+E::c ()
+{
+  if (x > 10)
+    throw 1;
+  x |= 2;
+}
+
+int
+main (void)
+{
+  {
+    E e;
+  }
+  if (x != 3)
+    abort ();
+}