microsoft-abi-structors.cpp revision b2969b1e50580344891a98f5b241f8351fe371cf
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, 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. 69void C::foo() {} 70 71void 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 78void 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 90void 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 105struct 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 120void use_D() { D c; } 121 122} // end namespace basic 123 124 125namespace constructors { 126 127struct A { 128 A() {} 129}; 130 131struct B : A { 132 B(); 133 ~B(); 134}; 135 136B::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 142struct C : virtual A { 143 C(); 144}; 145 146C::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 171void 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 178struct D : C { 179 D(); 180}; 181 182D::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 205struct E : virtual C { 206 E(); 207}; 208 209E::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. 236struct F { 237 F(); 238 virtual void f() = 0; 239}; 240 241F::F() {} 242// CHECK: define x86_thiscallcc %"struct.constructors::F"* @"\01??0F@constructors@@QAE@XZ" 243 244} // end namespace constructors 245 246namespace dtors { 247 248struct A { 249 ~A(); 250}; 251 252void 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 263struct B : virtual A { ~B(); }; 264struct C : virtual A { ~C(); }; 265struct D : B, C { ~D(); }; 266 267void 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 283void 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. 293void 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