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 7 namespace basic { 8 9 class A { 10 public: 11 A() { } 12 ~A() { } 13 }; 14 15 void 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"* %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 31 struct B { 32 B(); 33 }; 34 35 // Tests that we can define constructors outside the class (PR12784). 36 B::B() { 37 // CHECK: define x86_thiscallcc %"struct.basic::B"* @"\01??0B@basic@@QAE@XZ"(%"struct.basic::B"* %this) 38 // CHECK: ret 39 } 40 41 struct 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. 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 i8*** 75 // CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7C@basic@@6B@", i64 0, i64 0), 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"*, 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 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"*, 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 } 104 105 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 // DTORS: attributes [[NUW]] = { nounwind{{.*}} } 123 124 } // end namespace basic 125 126 127 namespace constructors { 128 129 struct A { 130 A() {} 131 }; 132 133 struct B : A { 134 B(); 135 ~B(); 136 }; 137 138 B::B() { 139 // CHECK: define x86_thiscallcc %"struct.constructors::B"* @"\01??0B@constructors@@QAE@XZ"(%"struct.constructors::B"* %this) 140 // CHECK: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 141 // CHECK: ret 142 } 143 144 struct C : virtual A { 145 C(); 146 }; 147 148 C::C() { 149 // CHECK: define x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %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: bitcast %"struct.constructors::C"* %{{.*}} to %"struct.constructors::A"* 158 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 159 // CHECK-NEXT: br label %[[SKIP_VBASES]] 160 // 161 // CHECK: [[SKIP_VBASES]] 162 // CHECK: @"\01??_7C@constructors@@6B@" 163 // CHECK: ret 164 } 165 166 void create_C() { 167 C c; 168 // CHECK: define void @"\01?create_C@constructors@@YAXXZ"() 169 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %c, i32 1) 170 // CHECK: ret 171 } 172 173 struct D : C { 174 D(); 175 }; 176 177 D::D() { 178 // CHECK: define x86_thiscallcc %"struct.constructors::D"* @"\01??0D@constructors@@QAE@XZ"(%"struct.constructors::D"* %this, i32 %is_most_derived) unnamed_addr 179 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 180 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 181 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 182 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 183 // 184 // CHECK: [[INIT_VBASES]] 185 // CHECK-NEXT: bitcast %"struct.constructors::D"* %{{.*}} to %"struct.constructors::A"* 186 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 187 // CHECK-NEXT: br label %[[SKIP_VBASES]] 188 // 189 // CHECK: [[SKIP_VBASES]] 190 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 191 // CHECK: ret 192 } 193 194 struct E : virtual C { 195 E(); 196 }; 197 198 E::E() { 199 // CHECK: define x86_thiscallcc %"struct.constructors::E"* @"\01??0E@constructors@@QAE@XZ"(%"struct.constructors::E"* %this, i32 %is_most_derived) unnamed_addr 200 // CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4 201 // CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]] 202 // CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0 203 // CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] 204 // 205 // CHECK: [[INIT_VBASES]] 206 // CHECK-NEXT: bitcast %"struct.constructors::E"* %{{.*}} to %"struct.constructors::A"* 207 // CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}}) 208 // CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0) 209 // CHECK-NEXT: br label %[[SKIP_VBASES]] 210 // 211 // CHECK: [[SKIP_VBASES]] 212 // CHECK: ret 213 } 214 215 } // end namespace constructors 216
