1 // RUN: %clang_cc1 -emit-llvm %s -o - -mconstructor-aliases -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 - -mconstructor-aliases -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 i8* 160 // CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4 161 // CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"* 162 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 163 // CHECK-NEXT: br label %[[SKIP_VBASES]] 164 // 165 // CHECK: [[SKIP_VBASES]] 166 // Class C does not define or override methods, so shouldn't change the vfptr. 167 // CHECK-NOT: @"\01??_7C@constructors@@6B@" 168 // CHECK: ret 169 } 170 171 void create_C() { 172 C c; 173 // CHECK: define void @"\01?create_C@constructors@@YAXXZ"() 174 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %c, i32 1) 175 // CHECK: ret 176 } 177 178 struct D : C { 179 D(); 180 }; 181 182 D::D() { 183 // CHECK: define x86_thiscallcc %"struct.constructors::D"* @"\01??0D@constructors@@QAE@XZ"(%"struct.constructors::D"* returned %this, i32 %is_most_derived) unnamed_addr 184 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 185 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 186 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 187 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 188 // 189 // CHECK: [[INIT_VBASES]] 190 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::D"* %{{.*}} to i8* 191 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 192 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 193 // CHECK-NEXT: store [2 x i32]* @"\01??_8D@constructors@@7B@", [2 x i32]** %[[vbptr]] 194 // CHECK-NEXT: bitcast %"struct.constructors::D"* %{{.*}} to i8* 195 // CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4 196 // CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"* 197 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 198 // CHECK-NEXT: br label %[[SKIP_VBASES]] 199 // 200 // CHECK: [[SKIP_VBASES]] 201 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 202 // CHECK: ret 203 } 204 205 struct E : virtual C { 206 E(); 207 }; 208 209 E::E() { 210 // CHECK: define x86_thiscallcc %"struct.constructors::E"* @"\01??0E@constructors@@QAE@XZ"(%"struct.constructors::E"* returned %this, i32 %is_most_derived) unnamed_addr 211 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 212 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 213 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 214 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 215 // 216 // CHECK: [[INIT_VBASES]] 217 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::E"* %{{.*}} to i8* 218 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 219 // CHECK-NEXT: %[[vbptr_E:.*]] = bitcast i8* %[[offs]] to [3 x i32]** 220 // CHECK-NEXT: store [3 x i32]* @"\01??_8E@constructors@@7B01@@", [3 x i32]** %[[vbptr_E]] 221 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 4 222 // CHECK-NEXT: %[[vbptr_C:.*]] = bitcast i8* %[[offs]] to [2 x i32]** 223 // CHECK-NEXT: store [2 x i32]* @"\01??_8E@constructors@@7BC@1@@", [2 x i32]** %[[vbptr_C]] 224 // CHECK-NEXT: bitcast %"struct.constructors::E"* %{{.*}} to i8* 225 // CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4 226 // CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"* 227 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 228 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 229 // CHECK-NEXT: br label %[[SKIP_VBASES]] 230 // 231 // CHECK: [[SKIP_VBASES]] 232 // CHECK: ret 233 } 234 235 // PR16735 - even abstract classes should have a constructor emitted. 236 struct F { 237 F(); 238 virtual void f() = 0; 239 }; 240 241 F::F() {} 242 // CHECK: define x86_thiscallcc %"struct.constructors::F"* @"\01??0F@constructors@@QAE@XZ" 243 244 } // end namespace constructors 245 246 namespace dtors { 247 248 struct A { 249 ~A(); 250 }; 251 252 void call_nv_complete(A *a) { 253 a->~A(); 254 // CHECK: define void @"\01?call_nv_complete@dtors@@YAXPAUA@1@@Z" 255 // CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 256 // CHECK: ret 257 } 258 259 // CHECK: declare x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 260 261 // Now try some virtual bases, where we need the complete dtor. 262 263 struct B : virtual A { ~B(); }; 264 struct C : virtual A { ~C(); }; 265 struct D : B, C { ~D(); }; 266 267 void call_vbase_complete(D *d) { 268 d->~D(); 269 // CHECK: define void @"\01?call_vbase_complete@dtors@@YAXPAUD@1@@Z" 270 // CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 271 // CHECK: ret 272 } 273 274 // The complete dtor should call the base dtors for D and the vbase A (once). 275 // CHECK: define linkonce_odr x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ" 276 // CHECK-NOT: call 277 // CHECK: call x86_thiscallcc void @"\01??1D@dtors@@QAE@XZ" 278 // CHECK-NOT: call 279 // CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ" 280 // CHECK-NOT: call 281 // CHECK: ret 282 283 void destroy_d_complete() { 284 D d; 285 // CHECK: define void @"\01?destroy_d_complete@dtors@@YAXXZ" 286 // CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 287 // CHECK: ret 288 } 289 290 // FIXME: Clang manually inlines the deletion, so we don't get a call to the 291 // deleting dtor (_G). The only way to call deleting dtors currently is through 292 // a vftable. 293 void call_nv_deleting_dtor(D *d) { 294 delete d; 295 // CHECK: define void @"\01?call_nv_deleting_dtor@dtors@@YAXPAUD@1@@Z" 296 // CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}}) 297 // CHECK: call void @"\01??3@YAXPAX@Z" 298 // CHECK: ret 299 } 300 301 } 302