1 files changed, 68 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ipa/devirt-4.C b/gcc/testsuite/g++.dg/ipa/devirt-4.C
new file mode 100644
index 000000000..72c883b3f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ipa/devirt-4.C
@@ -0,0 +1,68 @@
+/* Verify that ipa-co can convert virtual calls to direct ones even
+   when a typecast to an ancestor is involved along the way.  */
+/* { dg-do run } */
+/* { dg-options "-O3 -fno-early-inlining -fno-inline -fdump-ipa-cp -fdump-tree-optimized"  } */
+
+extern "C" void abort (void);
+
+class A
+{
+public:
+  int data;
+  virtual int foo (int i);
+};
+
+class B : public A
+{
+public:
+  virtual int foo (int i);
+};
+
+class C : public A
+{
+public:
+  virtual int foo (int i);
+};
+
+int A::foo (int i)
+{
+  return i + 1;
+}
+
+int B::foo (int i)
+{
+  return i + 2;
+}
+
+int C::foo (int i)
+{
+  return i + 3;
+}
+
+int __attribute__ ((noinline,noclone)) get_input(void)
+{
+  return 1;
+}
+
+static int middleman_1 (class A *obj, int i)
+{
+  return obj->foo (i);
+}
+
+static int middleman_2 (class B *obj, int i)
+{
+  return middleman_1 (obj, i);
+}
+
+int main (int argc, char *argv[])
+{
+  class B b;
+  if (middleman_2 (&b, get_input ()) != 3)
+    abort ();
+  return 0;
+}
+
+/* { dg-final { scan-ipa-dump "Discovered a virtual call to a known target.*B::foo"  "cp"  } } */
+/* { dg-final { scan-tree-dump-times "OBJ_TYPE_REF" 0 "optimized"} } */
+/* { dg-final { cleanup-ipa-dump "cp" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */