clang/test/CodeGenCXX/microsoft-abi-typeid.cpp

   1 // RUN: %clang_cc1 -emit-llvm -O1 -o - -triple=i386-pc-win32 %s -fexceptions -fcxx-exceptions | FileCheck %s
   2
   3 struct type_info;
   4 namespace std { using ::type_info; }
   5
   6 struct V { virtual void f(); };
   7 struct A : virtual V { A(); };
   8
   9 extern A a;
  10 extern V v;
  11 extern int b;
  12 A* fn();
  13
  14 const std::type_info* test0_typeid() { return &typeid(int); }
  15 // CHECK-LABEL: define dso_local noundef %struct.type_info* @"?test0_typeid@@YAPBUtype_info@@XZ"()
  16 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor2* @"??_R0H@8" to %struct.type_info*)
  17
  18 const std::type_info* test1_typeid() { return &typeid(A); }
  19 // CHECK-LABEL: define dso_local noundef %struct.type_info* @"?test1_typeid@@YAPBUtype_info@@XZ"()
  20 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUA@@@8" to %struct.type_info*)
  21
  22 const std::type_info* test2_typeid() { return &typeid(&a); }
  23 // CHECK-LABEL: define dso_local noundef %struct.type_info* @"?test2_typeid@@YAPBUtype_info@@XZ"()
  24 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor7* @"??_R0PAUA@@@8" to %struct.type_info*)
  25
  26 const std::type_info* test3_typeid() { return &typeid(*fn()); }
  27 // CHECK-LABEL: define dso_local noundef %struct.type_info* @"?test3_typeid@@YAPBUtype_info@@XZ"()
  28 // CHECK:        [[CALL:%.*]] = call noundef %struct.A* @"?fn@@YAPAUA@@XZ"()
  29 // CHECK-NEXT:   [[CMP:%.*]] = icmp eq %struct.A* [[CALL]], null
  30 // CHECK-NEXT:   br i1 [[CMP]]
  31 // CHECK:        call i8* @__RTtypeid(i8* null)
  32 // CHECK-NEXT:   unreachable
  33 // CHECK:        [[THIS:%.*]] = bitcast %struct.A* [[CALL]] to i8*
  34 // CHECK-NEXT:   [[VBTBLP:%.*]] = getelementptr %struct.A, %struct.A* [[CALL]], i32 0, i32 0
  35 // CHECK-NEXT:   [[VBTBL:%.*]] = load i32*, i32** [[VBTBLP]], align 4
  36 // CHECK-NEXT:   [[VBSLOT:%.*]] = getelementptr inbounds i32, i32* [[VBTBL]], i32 1
  37 // CHECK-NEXT:   [[VBASE_OFFS:%.*]] = load i32, i32* [[VBSLOT]], align 4
  38 // CHECK-NEXT:   [[ADJ:%.*]] = getelementptr inbounds i8, i8* [[THIS]], i32 [[VBASE_OFFS]]
  39 // CHECK-NEXT:   [[RT:%.*]] = call i8* @__RTtypeid(i8* nonnull [[ADJ]])
  40 // CHECK-NEXT:   [[RET:%.*]] = bitcast i8* [[RT]] to %struct.type_info*
  41 // CHECK-NEXT:   ret %struct.type_info* [[RET]]
  42
  43 const std::type_info* test4_typeid() { return &typeid(b); }
  44 // CHECK: define dso_local noundef %struct.type_info* @"?test4_typeid@@YAPBUtype_info@@XZ"()
  45 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor2* @"??_R0H@8" to %struct.type_info*)
  46
  47 const std::type_info* test5_typeid() { return &typeid(v); }
  48 // CHECK: define dso_local noundef %struct.type_info* @"?test5_typeid@@YAPBUtype_info@@XZ"()
  49 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUV@@@8" to %struct.type_info*)
  50
  51 const std::type_info *test6_typeid() { return &typeid((V &)v); }
  52 // CHECK: define dso_local noundef %struct.type_info* @"?test6_typeid@@YAPBUtype_info@@XZ"()
  53 // CHECK:   ret %struct.type_info* bitcast (%rtti.TypeDescriptor7* @"??_R0?AUV@@@8" to %struct.type_info*)
  54
  55 namespace PR26329 {
  56 struct Polymorphic {
  57   virtual ~Polymorphic();
  58 };
  59
  60 void f(const Polymorphic &poly) {
  61   try {
  62     throw;
  63   } catch (...) {
  64     Polymorphic cleanup;
  65     typeid(poly);
  66   }
  67 }
  68 // CHECK-LABEL: define dso_local void @"?f@PR26329@@YAXABUPolymorphic@1@@Z"(
  69 // CHECK: %[[cs:.*]] = catchswitch within none [label %{{.*}}] unwind to caller
  70 // CHECK: %[[cp:.*]] = catchpad within %[[cs]] [i8* null, i32 64, i8* null]
  71 // CHECK: invoke i8* @__RTtypeid(i8* {{.*}}) [ "funclet"(token %[[cp]]) ]
  72 }