Fix another vtable layout bug; we weren't looking hard enough for overriden functions when determining if an overrider will ever be used.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97306 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/vtable-layout.cpp b/test/CodeGenCXX/vtable-layout.cpp
index e3a0e8a..84f0132 100644
--- a/test/CodeGenCXX/vtable-layout.cpp
+++ b/test/CodeGenCXX/vtable-layout.cpp
@@ -609,3 +609,39 @@
void D::f() { }
}
+
+namespace Test17 {
+
+// Test that we don't mark E::f in the C-in-E vtable as unused.
+struct A { virtual void f(); };
+struct B : virtual A { virtual void f(); };
+struct C : virtual A { virtual void f(); };
+struct D : virtual B, virtual C { virtual void f(); };
+
+// CHECK: Vtable for 'Test17::E' (13 entries).
+// CHECK-NEXT: 0 | vbase_offset (0)
+// CHECK-NEXT: 1 | vbase_offset (8)
+// CHECK-NEXT: 2 | vbase_offset (0)
+// CHECK-NEXT: 3 | vbase_offset (0)
+// CHECK-NEXT: 4 | vcall_offset (0)
+// CHECK-NEXT: 5 | offset_to_top (0)
+// CHECK-NEXT: 6 | Test17::E RTTI
+// CHECK-NEXT: -- (Test17::A, 0) vtable address --
+// CHECK-NEXT: -- (Test17::B, 0) vtable address --
+// CHECK-NEXT: -- (Test17::D, 0) vtable address --
+// CHECK-NEXT: -- (Test17::E, 0) vtable address --
+// CHECK-NEXT: 7 | void Test17::E::f()
+// CHECK-NEXT: 8 | vbase_offset (-8)
+// CHECK-NEXT: 9 | vcall_offset (-8)
+// CHECK-NEXT: 10 | offset_to_top (-8)
+// CHECK-NEXT: 11 | Test17::E RTTI
+// CHECK-NEXT: -- (Test17::A, 8) vtable address --
+// CHECK-NEXT: -- (Test17::C, 8) vtable address --
+// CHECK-NEXT: 12 | void Test17::E::f()
+// CHECK-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
+class E : virtual D {
+ virtual void f();
+};
+void E::f() {}
+
+}