clang/test/CodeGenCXX/RelativeVTablesABI/virtual-function-call.cpp

   1 // Check that we call llvm.load.relative() on a vtable function call.
   2
   3 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O3 -o - -emit-llvm | FileCheck %s
   4
   5 // CHECK:      define{{.*}} void @_Z5A_fooP1A(ptr noundef %a) local_unnamed_addr
   6 // CHECK-NEXT: entry:
   7 // CHECK-NEXT:   %vtable = load ptr, ptr %a
   8 // CHECK-NEXT:   [[func_ptr:%[0-9]+]] = tail call ptr @llvm.load.relative.i32(ptr %vtable, i32 0)
   9 // CHECK-NEXT:   tail call void [[func_ptr]](ptr {{[^,]*}} %a)
  10 // CHECK-NEXT:   ret void
  11 // CHECK-NEXT: }
  12
  13 class A {
  14 public:
  15   virtual void foo();
  16 };
  17
  18 void A_foo(A *a) {
  19   a->foo();
  20 }