clang/test/CodeGenCXX/RelativeVTablesABI/relative-vtables-flag.cpp

   1 // Check the layout of the vtable for a normal class.
   2 // The Fuchsia relative vtables ABI will be hidden behind a flag for now as part
   3 // of a soft incremental rollout. This ABI should only be used if the flag for
   4 // it is passed on Fuchsia.
   5
   6 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -S -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck --check-prefix=RELATIVE-ABI %s
   7 // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -S -o - -emit-llvm -fno-experimental-relative-c++-abi-vtables | FileCheck --check-prefix=DEFAULT-ABI %s
   8
   9 // VTable contains offsets and references to the hidden symbols
  10 // RELATIVE-ABI: @_ZTV1A.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
  11 // RELATIVE-ABI: @_ZTV1A ={{.*}} unnamed_addr alias { [3 x i32] }, ptr @_ZTV1A.local
  12 // DEFAULT-ABI: @_ZTV1A ={{.*}} unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN1A3fooEv] }, align 8
  13
  14 class A {
  15 public:
  16   virtual void foo();
  17 };
  18
  19 void A::foo() {}
  20
  21 void A_foo(A *a) {
  22   a->foo();
  23 }