microsoft-abi-structors.cpp revision 9063302a82423cb83f002257a416741850739a70
1// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=i386-pc-win32 -fno-rtti > %t 2>&1 2// RUN: FileCheck %s < %t 3// Using a different check prefix as the inline destructors might be placed 4// anywhere in the output. 5// RUN: FileCheck --check-prefix=DTORS %s < %t 6 7namespace basic { 8 9class A { 10 public: 11 A() { } 12 ~A() { } 13}; 14 15void no_constructor_destructor_infinite_recursion() { 16 A a; 17 18// CHECK: define linkonce_odr x86_thiscallcc %"class.basic::A"* @"\01??0A@basic@@QAE@XZ"(%"class.basic::A"* returned %this) 19// CHECK: [[THIS_ADDR:%[.0-9A-Z_a-z]+]] = alloca %"class.basic::A"*, align 4 20// CHECK-NEXT: store %"class.basic::A"* %this, %"class.basic::A"** [[THIS_ADDR]], align 4 21// CHECK-NEXT: [[T1:%[.0-9A-Z_a-z]+]] = load %"class.basic::A"** [[THIS_ADDR]] 22// CHECK-NEXT: ret %"class.basic::A"* [[T1]] 23// CHECK-NEXT: } 24 25// Make sure that the destructor doesn't call itself: 26// CHECK: define {{.*}} @"\01??1A@basic@@QAE@XZ" 27// CHECK-NOT: call void @"\01??1A@basic@@QAE@XZ" 28// CHECK: ret 29} 30 31struct B { 32 B(); 33}; 34 35// Tests that we can define constructors outside the class (PR12784). 36B::B() { 37 // CHECK: define x86_thiscallcc %"struct.basic::B"* @"\01??0B@basic@@QAE@XZ"(%"struct.basic::B"* returned %this) 38 // CHECK: ret 39} 40 41struct C { 42 virtual ~C() { 43// Complete destructor first: 44// DTORS: define {{.*}} x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %this) 45 46// Then, the scalar deleting destructor (used in the vtable): 47// FIXME: add a test that verifies that the out-of-line scalar deleting 48// destructor is linkonce_odr too. 49// DTORS: define linkonce_odr x86_thiscallcc void @"\01??_GC@basic@@UAEPAXI@Z"(%"struct.basic::C"* %this, i1 zeroext %should_call_delete) 50// DTORS: %[[FROMBOOL:[0-9a-z]+]] = zext i1 %should_call_delete to i8 51// DTORS-NEXT: store i8 %[[FROMBOOL]], i8* %[[SHOULD_DELETE_VAR:[0-9a-z._]+]], align 1 52// DTORS: %[[SHOULD_DELETE_VALUE:[0-9a-z._]+]] = load i8* %[[SHOULD_DELETE_VAR]] 53// DTORS: call x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %[[THIS:[0-9a-z]+]]) 54// DTORS-NEXT: %[[CONDITION:[0-9]+]] = icmp eq i8 %[[SHOULD_DELETE_VALUE]], 0 55// DTORS-NEXT: br i1 %[[CONDITION]], label %[[CONTINUE_LABEL:[0-9a-z._]+]], label %[[CALL_DELETE_LABEL:[0-9a-z._]+]] 56// 57// DTORS: [[CALL_DELETE_LABEL]] 58// DTORS-NEXT: %[[THIS_AS_VOID:[0-9a-z]+]] = bitcast %"struct.basic::C"* %[[THIS]] to i8* 59// DTORS-NEXT: call void @"\01??3@YAXPAX@Z"(i8* %[[THIS_AS_VOID]]) [[NUW:#[0-9]+]] 60// DTORS-NEXT: br label %[[CONTINUE_LABEL]] 61// 62// DTORS: [[CONTINUE_LABEL]] 63// DTORS-NEXT: ret void 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 i8*** 75// CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7C@basic@@6B@", i64 0, i64 0), 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"*, i1)*** 83// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]] 84// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0 85// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]] 86// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext false) 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"*, i1)*** 98// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]] 99// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0 100// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]] 101// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext true) 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// DTORS: attributes [[NUW]] = { nounwind{{.*}} } 123 124} // end namespace basic 125 126 127namespace constructors { 128 129struct A { 130 A() {} 131}; 132 133struct B : A { 134 B(); 135 ~B(); 136}; 137 138B::B() { 139 // CHECK: define x86_thiscallcc %"struct.constructors::B"* @"\01??0B@constructors@@QAE@XZ"(%"struct.constructors::B"* returned %this) 140 // CHECK: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 141 // CHECK: ret 142} 143 144struct C : virtual A { 145 C(); 146}; 147 148C::C() { 149 // CHECK: define x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* returned %this, i32 %is_most_derived) 150 // TODO: make sure this works in the Release build too; 151 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 152 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 153 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 154 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 155 // 156 // CHECK: [[INIT_VBASES]] 157 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::C"* %{{.*}} to i8* 158 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 159 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 160 // CHECK-NEXT: store [2 x i32]* @"\01??_8C@constructors@@7B@", [2 x i32]** %[[vbptr]] 161 // CHECK-NEXT: bitcast %"struct.constructors::C"* %{{.*}} 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 // CHECK: @"\01??_7C@constructors@@6B@" 167 // CHECK: ret 168} 169 170void create_C() { 171 C c; 172 // CHECK: define void @"\01?create_C@constructors@@YAXXZ"() 173 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %c, i32 1) 174 // CHECK: ret 175} 176 177struct D : C { 178 D(); 179}; 180 181D::D() { 182 // CHECK: define x86_thiscallcc %"struct.constructors::D"* @"\01??0D@constructors@@QAE@XZ"(%"struct.constructors::D"* returned %this, i32 %is_most_derived) unnamed_addr 183 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 184 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 185 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 186 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 187 // 188 // CHECK: [[INIT_VBASES]] 189 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::D"* %{{.*}} to i8* 190 // CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 191 // CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]** 192 // CHECK-NEXT: store [2 x i32]* @"\01??_8D@constructors@@7B@", [2 x i32]** %[[vbptr]] 193 // CHECK-NEXT: bitcast %"struct.constructors::D"* %{{.*}} to %"struct.constructors::A"* 194 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 195 // CHECK-NEXT: br label %[[SKIP_VBASES]] 196 // 197 // CHECK: [[SKIP_VBASES]] 198 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 199 // CHECK: ret 200} 201 202struct E : virtual C { 203 E(); 204}; 205 206E::E() { 207 // CHECK: define x86_thiscallcc %"struct.constructors::E"* @"\01??0E@constructors@@QAE@XZ"(%"struct.constructors::E"* returned %this, i32 %is_most_derived) unnamed_addr 208 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 209 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 210 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 211 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 212 // 213 // CHECK: [[INIT_VBASES]] 214 // CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::E"* %{{.*}} to i8* 215 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0 216 // CHECK-NEXT: %[[vbptr_E:.*]] = bitcast i8* %[[offs]] to [3 x i32]** 217 // CHECK-NEXT: store [3 x i32]* @"\01??_8E@constructors@@7B01@@", [3 x i32]** %[[vbptr_E]] 218 // CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 4 219 // CHECK-NEXT: %[[vbptr_C:.*]] = bitcast i8* %[[offs]] to [2 x i32]** 220 // CHECK-NEXT: store [2 x i32]* @"\01??_8E@constructors@@7BC@1@@", [2 x i32]** %[[vbptr_C]] 221 // CHECK-NEXT: bitcast %"struct.constructors::E"* %{{.*}} to %"struct.constructors::A"* 222 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 223 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 224 // CHECK-NEXT: br label %[[SKIP_VBASES]] 225 // 226 // CHECK: [[SKIP_VBASES]] 227 // CHECK: ret 228} 229 230} // end namespace constructors 231