clang/test/CodeGenCXX/cfi-multiple-inheritance.cpp

   1 // Test that correct vtable ptr and type metadata are passed to llvm.type.test
   2 // Related to Bugzilla 43390.
   3
   4 // RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility hidden -std=c++11 -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s
   5
   6 class A1 {
   7 public:
   8     virtual int f1() = 0;
   9 };
  10
  11 class A2 {
  12 public:
  13     virtual int f2() = 0;
  14 };
  15
  16
  17 class B : public A1, public A2 {
  18 public:
  19     int f2() final { return 1; }
  20     int f1() final { return 2; }
  21 };
  22
  23 // CHECK-LABEL: define hidden noundef i32 @_Z3foov
  24 int foo() {
  25     B b;
  26     return static_cast<A2*>(&b)->f2();
  27     // CHECK: [[P:%[^ ]*]] = bitcast %class.B* %b to i8**
  28     // CHECK: [[V:%[^ ]*]] = load i8*, i8** [[P]], align 8
  29     // CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"_ZTS1B")
  30     // CHECK: call i1 @llvm.type.test(i8* [[V]], metadata !"all-vtables")
  31 }