TheRock/compiler/amd-llvm/clang/test/CodeGenCXX/RelativeVTablesABI/available_externally-vtable.cpp

// Check that available_externally vtables do not receive aliases.
// We check this specifically under the legacy pass manager because the new pass
// manager seems to remove available_externally vtables from the IR entirely.

// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -disable-llvm-passes -o - -emit-llvm | FileCheck %s

// The VTable for A is available_externally, meaning it can have a definition in
// IR, but is never emitted in this compilation unit. Because it won't be
// emitted here, we cannot make an alias, but we won't need to in the first
// place.
// CHECK: @_ZTV1A = available_externally constant { [3 x i32] }
// CHECK-NOT: @_ZTV1A = {{.*}}alias

class A {
public:
  virtual void foo();
};
void A_foo(A *a);

void func() {
  A a;
  A_foo(&a);
}