microsoft-abi-structors.cpp revision 4b104067143cd97e954d279ddc42ed03bbe86a08
1// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=i386-pc-win32 -fno-rtti > %t 2// RUN: FileCheck %s < %t 3// vftables are emitted very late, so do another pass to try to keep the checks 4// in source order. 5// RUN: FileCheck --check-prefix DTORS %s < %t 6// 7// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=x86_64-pc-win32 -fno-rtti | FileCheck --check-prefix DTORS-X64 %s 8 9namespace basic { 10 11class A { 12 public: 13 A() { } 14 ~A(); 15}; 16 17void no_constructor_destructor_infinite_recursion() { 18 A a; 19 20// CHECK: define linkonce_odr x86_thiscallcc %"class.basic::A"* @"\01??0A@basic@@QAE@XZ"(%"class.basic::A"* returned %this) 21// CHECK: [[THIS_ADDR:%[.0-9A-Z_a-z]+]] = alloca %"class.basic::A"*, align 4 22// CHECK-NEXT: store %"class.basic::A"* %this, %"class.basic::A"** [[THIS_ADDR]], align 4 23// CHECK-NEXT: [[T1:%[.0-9A-Z_a-z]+]] = load %"class.basic::A"** [[THIS_ADDR]] 24// CHECK-NEXT: ret %"class.basic::A"* [[T1]] 25// CHECK-NEXT: } 26} 27 28A::~A() { 29// Make sure that the destructor doesn't call itself: 30// CHECK: define {{.*}} @"\01??1A@basic@@QAE@XZ" 31// CHECK-NOT: call void @"\01??1A@basic@@QAE@XZ" 32// CHECK: ret 33} 34 35struct B { 36 B(); 37}; 38 39// Tests that we can define constructors outside the class (PR12784). 40B::B() { 41 // CHECK: define x86_thiscallcc %"struct.basic::B"* @"\01??0B@basic@@QAE@XZ"(%"struct.basic::B"* returned %this) 42 // CHECK: ret 43} 44 45struct C { 46 virtual ~C() { 47// DTORS: define linkonce_odr x86_thiscallcc void @"\01??_GC@basic@@UAEPAXI@Z"(%"struct.basic::C"* %this, i1 zeroext %should_call_delete) 48// DTORS: %[[FROMBOOL:[0-9a-z]+]] = zext i1 %should_call_delete to i8 49// DTORS-NEXT: store i8 %[[FROMBOOL]], i8* %[[SHOULD_DELETE_VAR:[0-9a-z._]+]], align 1 50// DTORS: %[[SHOULD_DELETE_VALUE:[0-9a-z._]+]] = load i8* %[[SHOULD_DELETE_VAR]] 51// DTORS: call x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %[[THIS:[0-9a-z]+]]) 52// DTORS-NEXT: %[[CONDITION:[0-9]+]] = icmp eq i8 %[[SHOULD_DELETE_VALUE]], 0 53// DTORS-NEXT: br i1 %[[CONDITION]], label %[[CONTINUE_LABEL:[0-9a-z._]+]], label %[[CALL_DELETE_LABEL:[0-9a-z._]+]] 54// 55// DTORS: [[CALL_DELETE_LABEL]] 56// DTORS-NEXT: %[[THIS_AS_VOID:[0-9a-z]+]] = bitcast %"struct.basic::C"* %[[THIS]] to i8* 57// DTORS-NEXT: call void @"\01??3@YAXPAX@Z"(i8* %[[THIS_AS_VOID]]) 58// DTORS-NEXT: br label %[[CONTINUE_LABEL]] 59// 60// DTORS: [[CONTINUE_LABEL]] 61// DTORS-NEXT: ret void 62 63// Check that we do the mangling correctly on x64. 64// DTORS-X64: @"\01??_GC@basic@@UEAAPEAXI@Z" 65 } 66 virtual void foo(); 67}; 68 69// Emits the vftable in the output. 70void C::foo() {} 71 72void check_vftable_offset() { 73 C c; 74// The vftable pointer should point at the beginning of the vftable. 75// CHECK: [[THIS_PTR:%[0-9]+]] = bitcast %"struct.basic::C"* {{.*}} to i8*** 76// CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7C@basic@@6B@", i64 0, i64 0), i8*** [[THIS_PTR]] 77} 78 79void call_complete_dtor(C *obj_ptr) { 80// CHECK: define void @"\01?call_complete_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr) 81 obj_ptr->~C(); 82// CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4 83// CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i1)*** 84// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]] 85// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0 86// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]] 87// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext false) 88// CHECK-NEXT: ret void 89} 90 91void call_deleting_dtor(C *obj_ptr) { 92// CHECK: define void @"\01?call_deleting_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr) 93 delete obj_ptr; 94// CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4 95// CHECK: br i1 {{.*}}, label %[[DELETE_NULL:.*]], label %[[DELETE_NOTNULL:.*]] 96 97// CHECK: [[DELETE_NOTNULL]] 98// CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i1)*** 99// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]] 100// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0 101// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]] 102// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext true) 103// CHECK: ret void 104} 105 106struct D { 107 static int foo(); 108 109 D() { 110 static int ctor_static = foo(); 111 // CHECK that the static in the ctor gets mangled correctly: 112 // CHECK: @"\01?ctor_static@?1???0D@basic@@QAE@XZ@4HA" 113 } 114 ~D() { 115 static int dtor_static = foo(); 116 // CHECK that the static in the dtor gets mangled correctly: 117 // CHECK: @"\01?dtor_static@?1???1D@basic@@QAE@XZ@4HA" 118 } 119}; 120 121void use_D() { D c; } 122 123} // end namespace basic 124 125 126namespace constructors { 127 128struct A { 129 A() {} 130}; 131 132struct B : A { 133 B(); 134 ~B(); 135}; 136 137B::B() { 138 // CHECK: define x86_thiscallcc %"struct.constructors::B"* @"\01??0B@constructors@@QAE@XZ"(%"struct.constructors::B"* returned %this) 139 // CHECK: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 140 // CHECK: ret 141} 142 143struct C : virtual A { 144 C(); 145}; 146 147C::C() { 148 // CHECK: define x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* returned %this, i32 %is_most_derived) 149 // TODO: make sure this works in the Release build too; 150 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 151 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 152 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 153 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 154 // 155 // CHECK: [[INIT_VBASES]] 156 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::C"* %{{.*}} to i8* 157 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 158 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 159 // CHECK-NEXT: store [2 x i32]* @"\01??_8C@constructors@@7B@", [2 x i32]** %[[vbptr]] 160 // CHECK-NEXT: bitcast %"struct.constructors::C"* %{{.*}} to %"struct.constructors::A"* 161 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 162 // CHECK-NEXT: br label %[[SKIP_VBASES]] 163 // 164 // CHECK: [[SKIP_VBASES]] 165 // CHECK: @"\01??_7C@constructors@@6B@" 166 // CHECK: ret 167} 168 169void create_C() { 170 C c; 171 // CHECK: define void @"\01?create_C@constructors@@YAXXZ"() 172 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %c, i32 1) 173 // CHECK: ret 174} 175 176struct D : C { 177 D(); 178}; 179 180D::D() { 181 // CHECK: define x86_thiscallcc %"struct.constructors::D"* @"\01??0D@constructors@@QAE@XZ"(%"struct.constructors::D"* returned %this, i32 %is_most_derived) unnamed_addr 182 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 183 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 184 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 185 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 186 // 187 // CHECK: [[INIT_VBASES]] 188 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::D"* %{{.*}} to i8* 189 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 190 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 191 // CHECK-NEXT: store [2 x i32]* @"\01??_8D@constructors@@7B@", [2 x i32]** %[[vbptr]] 192 // CHECK-NEXT: bitcast %"struct.constructors::D"* %{{.*}} to %"struct.constructors::A"* 193 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 194 // CHECK-NEXT: br label %[[SKIP_VBASES]] 195 // 196 // CHECK: [[SKIP_VBASES]] 197 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 198 // CHECK: ret 199} 200 201struct E : virtual C { 202 E(); 203}; 204 205E::E() { 206 // CHECK: define x86_thiscallcc %"struct.constructors::E"* @"\01??0E@constructors@@QAE@XZ"(%"struct.constructors::E"* returned %this, i32 %is_most_derived) unnamed_addr 207 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 208 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 209 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 210 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 211 // 212 // CHECK: [[INIT_VBASES]] 213 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::E"* %{{.*}} to i8* 214 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 215 // CHECK-NEXT: %[[vbptr_E:.*]] = bitcast i8* %[[offs]] to [3 x i32]** 216 // CHECK-NEXT: store [3 x i32]* @"\01??_8E@constructors@@7B01@@", [3 x i32]** %[[vbptr_E]] 217 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 4 218 // CHECK-NEXT: %[[vbptr_C:.*]] = bitcast i8* %[[offs]] to [2 x i32]** 219 // CHECK-NEXT: store [2 x i32]* @"\01??_8E@constructors@@7BC@1@@", [2 x i32]** %[[vbptr_C]] 220 // CHECK-NEXT: bitcast %"struct.constructors::E"* %{{.*}} to %"struct.constructors::A"* 221 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 222 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 223 // CHECK-NEXT: br label %[[SKIP_VBASES]] 224 // 225 // CHECK: [[SKIP_VBASES]] 226 // CHECK: ret 227} 228 229// PR16735 - even abstract classes should have a constructor emitted. 230struct F { 231 F(); 232 virtual void f() = 0; 233}; 234 235F::F() {} 236// CHECK: define x86_thiscallcc %"struct.constructors::F"* @"\01??0F@constructors@@QAE@XZ" 237 238} // end namespace constructors 239 240namespace dtors { 241 242struct A { 243 ~A(); 244}; 245 246void call_nv_complete(A *a) { 247 a->~A(); 248// CHECK: define void @"\01?call_nv_complete@dtors@@YAXPAUA@1@@Z" 249// CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 250// CHECK: ret 251} 252 253// CHECK: declare x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 254 255// Now try some virtual bases, where we need the complete dtor. 256 257struct B : virtual A { ~B(); }; 258struct C : virtual A { ~C(); }; 259struct D : B, C { ~D(); }; 260 261void call_vbase_complete(D *d) { 262 d->~D(); 263// CHECK: define void @"\01?call_vbase_complete@dtors@@YAXPAUD@1@@Z" 264// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 265// CHECK: ret 266} 267 268// The complete dtor should call the base dtors for D and the vbase A (once). 269// CHECK: define linkonce_odr x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ" 270// CHECK-NOT: call 271// CHECK: call x86_thiscallcc void @"\01??1D@dtors@@QAE@XZ" 272// CHECK-NOT: call 273// CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 274// CHECK-NOT: call 275// CHECK: ret 276 277void destroy_d_complete() { 278 D d; 279// CHECK: define void @"\01?destroy_d_complete@dtors@@YAXXZ" 280// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 281// CHECK: ret 282} 283 284// FIXME: Clang manually inlines the deletion, so we don't get a call to the 285// deleting dtor (_G). The only way to call deleting dtors currently is through 286// a vftable. 287void call_nv_deleting_dtor(D *d) { 288 delete d; 289// CHECK: define void @"\01?call_nv_deleting_dtor@dtors@@YAXPAUD@1@@Z" 290// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 291// CHECK: call void @"\01??3@YAXPAX@Z" 292// CHECK: ret 293} 294 295} 296