clang/test/CodeGenCXX/RelativeVTablesABI/available_externally-vtable.cpp

   1 // Check that available_externally vtables do not receive aliases.
   2 // We check this specifically under the legacy pass manager because the new pass
   3 // manager seems to remove available_externally vtables from the IR entirely.
   4
   5 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -disable-llvm-passes -S -o - -emit-llvm | FileCheck %s
   6
   7 // The VTable for A is available_externally, meaning it can have a definition in
   8 // IR, but is never emitted in this compilation unit. Because it won't be
   9 // emitted here, we cannot make an alias, but we won't need to in the first
  10 // place.
  11 // CHECK: @_ZTV1A = available_externally unnamed_addr constant { [3 x i32] }
  12 // CHECK-NOT: @_ZTV1A = {{.*}}alias
  13
  14 class A {
  15 public:
  16   virtual void foo();
  17 };
  18 void A_foo(A *a);
  19
  20 void func() {
  21   A a;
  22   A_foo(&a);
  23 }