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 9 namespace basic { 10 11 class A { 12 public: 13 A() { } 14 ~A(); 15 }; 16 17 void 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 28 A::~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 35 struct B { 36 B(); 37 }; 38 39 // Tests that we can define constructors outside the class (PR12784). 40 B::B() { 41 // CHECK: define x86_thiscallcc %"struct.basic::B"* @"\01??0B@basic@@QAE@XZ"(%"struct.basic::B"* returned %this) 42 // CHECK: ret 43 } 44 45 struct C { 46 virtual ~C() { 47 // DTORS: define linkonce_odr x86_thiscallcc void @"\01??_GC@basic@@UAEPAXI@Z"(%"struct.basic::C"* %this, i32 %should_call_delete) 48 // DTORS: store i32 %should_call_delete, i32* %[[SHOULD_DELETE_VAR:[0-9a-z._]+]], align 4 49 // DTORS: %[[SHOULD_DELETE_VALUE:[0-9a-z._]+]] = load i32* %[[SHOULD_DELETE_VAR]] 50 // DTORS: call x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %[[THIS:[0-9a-z]+]]) 51 // DTORS-NEXT: %[[CONDITION:[0-9]+]] = icmp eq i32 %[[SHOULD_DELETE_VALUE]], 0 52 // DTORS-NEXT: br i1 %[[CONDITION]], label %[[CONTINUE_LABEL:[0-9a-z._]+]], label %[[CALL_DELETE_LABEL:[0-9a-z._]+]] 53 // 54 // DTORS: [[CALL_DELETE_LABEL]] 55 // DTORS-NEXT: %[[THIS_AS_VOID:[0-9a-z]+]] = bitcast %"struct.basic::C"* %[[THIS]] to i8* 56 // DTORS-NEXT: call void @"\01??3@YAXPAX@Z"(i8* %[[THIS_AS_VOID]]) 57 // DTORS-NEXT: br label %[[CONTINUE_LABEL]] 58 // 59 // DTORS: [[CONTINUE_LABEL]] 60 // DTORS-NEXT: ret void 61 62 // Check that we do the mangling correctly on x64. 63 // DTORS-X64: @"\01??_GC@basic@@UEAAPEAXI@Z" 64 } 65 virtual void foo(); 66 }; 67 68 // Emits the vftable in the output. 69 void C::foo() {} 70 71 void check_vftable_offset() { 72 C c; 73 // The vftable pointer should point at the beginning of the vftable. 74 // CHECK: [[THIS_PTR:%[0-9]+]] = bitcast %"struct.basic::C"* {{.*}} to [2 x i8*]** 75 // CHECK: store [2 x i8*]* @"\01??_7C@basic@@6B@", [2 x i8*]** [[THIS_PTR]] 76 } 77 78 void call_complete_dtor(C *obj_ptr) { 79 // CHECK: define void @"\01?call_complete_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr) 80 obj_ptr->~C(); 81 // CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4 82 // CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i32)*** 83 // CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i32)*** %[[PVTABLE]] 84 // CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i32)** %[[VTABLE]], i64 0 85 // CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i32)** %[[PVDTOR]] 86 // CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i32 0) 87 // CHECK-NEXT: ret void 88 } 89 90 void call_deleting_dtor(C *obj_ptr) { 91 // CHECK: define void @"\01?call_deleting_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr) 92 delete obj_ptr; 93 // CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4 94 // CHECK: br i1 {{.*}}, label %[[DELETE_NULL:.*]], label %[[DELETE_NOTNULL:.*]] 95 96 // CHECK: [[DELETE_NOTNULL]] 97 // CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i32)*** 98 // CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i32)*** %[[PVTABLE]] 99 // CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i32)** %[[VTABLE]], i64 0 100 // CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i32)** %[[PVDTOR]] 101 // CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i32 1) 102 // CHECK: ret void 103 } 104 105 struct D { 106 static int foo(); 107 108 D() { 109 static int ctor_static = foo(); 110 // CHECK that the static in the ctor gets mangled correctly: 111 // CHECK: @"\01?ctor_static@?1???0D@basic@@QAE@XZ@4HA" 112 } 113 ~D() { 114 static int dtor_static = foo(); 115 // CHECK that the static in the dtor gets mangled correctly: 116 // CHECK: @"\01?dtor_static@?1???1D@basic@@QAE@XZ@4HA" 117 } 118 }; 119 120 void use_D() { D c; } 121 122 } // end namespace basic 123 124 125 namespace constructors { 126 127 struct A { 128 A() {} 129 }; 130 131 struct B : A { 132 B(); 133 ~B(); 134 }; 135 136 B::B() { 137 // CHECK: define x86_thiscallcc %"struct.constructors::B"* @"\01??0B@constructors@@QAE@XZ"(%"struct.constructors::B"* returned %this) 138 // CHECK: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 139 // CHECK: ret 140 } 141 142 struct C : virtual A { 143 C(); 144 }; 145 146 C::C() { 147 // CHECK: define x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* returned %this, i32 %is_most_derived) 148 // TODO: make sure this works in the Release build too; 149 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 150 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 151 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 152 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 153 // 154 // CHECK: [[INIT_VBASES]] 155 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::C"* %{{.*}} to i8* 156 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 157 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 158 // CHECK-NEXT: store [2 x i32]* @"\01??_8C@constructors@@7B@", [2 x i32]** %[[vbptr]] 159 // CHECK-NEXT: bitcast %"struct.constructors::C"* %{{.*}} to %"struct.constructors::A"* 160 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 161 // CHECK-NEXT: br label %[[SKIP_VBASES]] 162 // 163 // CHECK: [[SKIP_VBASES]] 164 // Class C does not define or override methods, so shouldn't change the vfptr. 165 // CHECK-NOT: @"\01??_7C@constructors@@6B@" 166 // CHECK: ret 167 } 168 169 void 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 } 175 176 struct D : C { 177 D(); 178 }; 179 180 D::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 } 200 201 struct E : virtual C { 202 E(); 203 }; 204 205 E::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. 230 struct F { 231 F(); 232 virtual void f() = 0; 233 }; 234 235 F::F() {} 236 // CHECK: define x86_thiscallcc %"struct.constructors::F"* @"\01??0F@constructors@@QAE@XZ" 237 238 } // end namespace constructors 239 240 namespace dtors { 241 242 struct A { 243 ~A(); 244 }; 245 246 void 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. 256 257 struct B : virtual A { ~B(); }; 258 struct C : virtual A { ~C(); }; 259 struct D : B, C { ~D(); }; 260 261 void 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 276 277 void 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. 287 void 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