1 // RUN: %clang_cc1 -fno-rtti %s -emit-llvm -o %t -triple=i386-pc-win32 -fdump-vtable-layouts 2>&1 | FileCheck --check-prefix=VFTABLES %s 2 // RUN: FileCheck --check-prefix=GLOBALS %s < %t 3 // RUN: FileCheck --check-prefix=CODEGEN %s < %t 4 5 namespace test1 { 6 7 // Some covariant types. 8 struct A { int a; }; 9 struct B { int b; }; 10 struct C : A, B { int c; }; 11 struct D : C { int d; }; 12 struct E : D { int e; }; 13 14 // One base class and two overrides, all with covariant return types. 15 struct H { virtual B *foo(); }; 16 struct I : H { virtual C *foo(); }; 17 struct J : I { virtual D *foo(); J(); }; 18 struct K : J { virtual E *foo(); K(); }; 19 20 J::J() {} 21 22 // VFTABLES-LABEL: VFTable for 'test1::H' in 'test1::I' in 'test1::J' (3 entries). 23 // VFTABLES-NEXT: 0 | test1::D *test1::J::foo() 24 // VFTABLES-NEXT: [return adjustment (to type 'struct test1::B *'): 4 non-virtual] 25 // VFTABLES-NEXT: 1 | test1::D *test1::J::foo() 26 // VFTABLES-NEXT: [return adjustment (to type 'struct test1::C *'): 0 non-virtual] 27 // VFTABLES-NEXT: 2 | test1::D *test1::J::foo() 28 29 // GLOBALS-LABEL: @"\01??_7J@test1@@6B@" = linkonce_odr unnamed_addr constant [3 x i8*] 30 // GLOBALS: @"\01?foo@J@test1@@QAEPAUB@2@XZ" 31 // GLOBALS: @"\01?foo@J@test1@@QAEPAUC@2@XZ" 32 // GLOBALS: @"\01?foo@J@test1@@UAEPAUD@2@XZ" 33 34 K::K() {} 35 36 // VFTABLES-LABEL: VFTable for 'test1::H' in 'test1::I' in 'test1::J' in 'test1::K' (4 entries). 37 // VFTABLES-NEXT: 0 | test1::E *test1::K::foo() 38 // VFTABLES-NEXT: [return adjustment (to type 'struct test1::B *'): 4 non-virtual] 39 // VFTABLES-NEXT: 1 | test1::E *test1::K::foo() 40 // VFTABLES-NEXT: [return adjustment (to type 'struct test1::C *'): 0 non-virtual] 41 // VFTABLES-NEXT: 2 | test1::E *test1::K::foo() 42 // VFTABLES-NEXT: [return adjustment (to type 'struct test1::D *'): 0 non-virtual] 43 // VFTABLES-NEXT: 3 | test1::E *test1::K::foo() 44 45 // Only B to C requires adjustment, but we get 3 thunks in K's vftable, two of 46 // which are trivial. 47 // GLOBALS-LABEL: @"\01??_7K@test1@@6B@" = linkonce_odr unnamed_addr constant [4 x i8*] 48 // GLOBALS: @"\01?foo@K@test1@@QAEPAUB@2@XZ" 49 // GLOBALS: @"\01?foo@K@test1@@QAEPAUC@2@XZ" 50 // GLOBALS: @"\01?foo@K@test1@@QAEPAUD@2@XZ" 51 // GLOBALS: @"\01?foo@K@test1@@UAEPAUE@2@XZ" 52 53 // This thunk has a return adjustment. 54 // CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUB@2@XZ" 55 // CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ" 56 // CODEGEN: icmp {{.*}}, null 57 // CODEGEN: getelementptr 58 // CODEGEN: ret 59 60 // These two don't. 61 // CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUC@2@XZ" 62 // CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ" 63 // CODEGEN-NEXT: ret 64 65 // CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUD@2@XZ" 66 // CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ" 67 // CODEGEN-NEXT: ret 68 69 } 70 71 namespace test2 { 72 73 // Covariant types. D* is not trivially convertible to C*. 74 struct A { int a; }; 75 struct B { int b; }; 76 struct C : B { int c; }; 77 struct D : A, C { int d; }; 78 struct E : D { int e; }; 79 80 // J's foo will require an adjusting thunk, and K will require a trivial thunk. 81 struct H { virtual B *foo(); }; 82 struct I : H { virtual C *foo(); }; 83 struct J : I { virtual D *foo(); J(); }; 84 struct K : J { virtual E *foo(); K(); }; 85 86 J::J() {} 87 88 // VFTABLES-LABEL: VFTable for 'test2::H' in 'test2::I' in 'test2::J' (2 entries). 89 // VFTABLES-NEXT: 0 | test2::D *test2::J::foo() 90 // VFTABLES-NEXT: [return adjustment (to type 'struct test2::B *'): 4 non-virtual] 91 // VFTABLES-NEXT: 1 | test2::D *test2::J::foo() 92 93 // GLOBALS-LABEL: @"\01??_7J@test2@@6B@" = linkonce_odr unnamed_addr constant [2 x i8*] 94 95 K::K() {} 96 97 // VFTABLES-LABEL: VFTable for 'test2::H' in 'test2::I' in 'test2::J' in 'test2::K' (3 entries). 98 // VFTABLES-NEXT: 0 | test2::E *test2::K::foo() 99 // VFTABLES-NEXT: [return adjustment (to type 'struct test2::B *'): 4 non-virtual] 100 // VFTABLES-NEXT: 1 | test2::E *test2::K::foo() 101 // VFTABLES-NEXT: [return adjustment (to type 'struct test2::D *'): 0 non-virtual] 102 // VFTABLES-NEXT: 2 | test2::E *test2::K::foo() 103 104 // GLOBALS-LABEL: @"\01??_7K@test2@@6B@" = linkonce_odr unnamed_addr constant [3 x i8*] 105 106 } 107 108 namespace pr20479 { 109 struct A { 110 virtual A *f(); 111 }; 112 113 struct B : virtual A { 114 virtual B *f(); 115 }; 116 117 struct C : virtual A, B { 118 // VFTABLES-LABEL: VFTable for 'pr20479::A' in 'pr20479::B' in 'pr20479::C' (2 entries). 119 // VFTABLES-NEXT: 0 | pr20479::B *pr20479::B::f() 120 // VFTABLES-NEXT: [return adjustment (to type 'struct pr20479::A *'): vbase #1, 0 non-virtual] 121 // VFTABLES-NEXT: 1 | pr20479::B *pr20479::B::f() 122 C(); 123 }; 124 125 C::C() {} 126 127 // GLOBALS-LABEL: @"\01??_7C@pr20479@@6B@" = linkonce_odr unnamed_addr constant [2 x i8*] 128 // GLOBALS: @"\01?f@B@pr20479@@QAEPAUA@2@XZ" 129 // GLOBALS: @"\01?f@B@pr20479@@UAEPAU12@XZ" 130 } 131 132 namespace pr21073 { 133 struct A { 134 virtual A *f(); 135 }; 136 137 struct B : virtual A { 138 virtual B *f(); 139 }; 140 141 struct C : virtual A, virtual B { 142 // VFTABLES-LABEL: VFTable for 'pr21073::A' in 'pr21073::B' in 'pr21073::C' (2 entries). 143 // VFTABLES-NEXT: 0 | pr21073::B *pr21073::B::f() 144 // VFTABLES-NEXT: [return adjustment (to type 'struct pr21073::A *'): vbase #1, 0 non-virtual] 145 // VFTABLES-NEXT: [this adjustment: 8 non-virtual] 146 // VFTABLES-NEXT: 1 | pr21073::B *pr21073::B::f() 147 // VFTABLES-NEXT: [return adjustment (to type 'struct pr21073::B *'): 0 non-virtual] 148 // VFTABLES-NEXT: [this adjustment: 8 non-virtual] 149 C(); 150 }; 151 152 C::C() {} 153 154 // GLOBALS-LABEL: @"\01??_7C@pr21073@@6B@" = linkonce_odr unnamed_addr constant [2 x i8*] 155 // GLOBALS: @"\01?f@B@pr21073@@WPPPPPPPI@AEPAUA@2@XZ" 156 // GLOBALS: @"\01?f@B@pr21073@@WPPPPPPPI@AEPAU12@XZ" 157 } 158 159 namespace pr21073_2 { 160 struct A { virtual A *foo(); }; 161 struct B : virtual A {}; 162 struct C : virtual A { virtual C *foo(); }; 163 struct D : B, C { D(); }; 164 D::D() {} 165 166 // VFTABLES-LABEL: VFTable for 'pr21073_2::A' in 'pr21073_2::C' in 'pr21073_2::D' (2 entries) 167 // VFTABLES-NEXT: 0 | pr21073_2::C *pr21073_2::C::foo() 168 // VFTABLES-NEXT: [return adjustment (to type 'struct pr21073_2::A *'): vbase #1, 0 non-virtual] 169 // VFTABLES-NEXT: 1 | pr21073_2::C *pr21073_2::C::foo() 170 171 // GLOBALS-LABEL: @"\01??_7D@pr21073_2@@6B@" = {{.*}} constant [2 x i8*] 172 // GLOBALS: @"\01?foo@C@pr21073_2@@QAEPAUA@2@XZ" 173 // GLOBALS: @"\01?foo@C@pr21073_2@@UAEPAU12@XZ" 174 } 175 176 namespace test3 { 177 struct A { virtual A *fn(); }; 178 struct B : virtual A { virtual B *fn(); }; 179 struct X : virtual B {}; 180 struct Y : virtual B {}; 181 struct C : X, Y {}; 182 struct D : virtual B, virtual A, C { 183 D *fn(); 184 D(); 185 }; 186 D::D() {} 187 188 // VFTABLES-LABEL: VFTable for 'test3::A' in 'test3::B' in 'test3::X' in 'test3::C' in 'test3::D' (3 entries). 189 // VFTABLES-NEXT: 0 | test3::D *test3::D::fn() 190 // VFTABLES-NEXT: [return adjustment (to type 'struct test3::A *'): vbase #1, 0 non-virtual] 191 // VFTABLES-NEXT: [this adjustment: vtordisp at -4, 0 non-virtual] 192 // VFTABLES-NEXT: 1 | test3::D *test3::D::fn() 193 // VFTABLES-NEXT: [return adjustment (to type 'struct test3::B *'): vbase #2, 0 non-virtual] 194 // VFTABLES-NEXT: [this adjustment: vtordisp at -4, 0 non-virtual] 195 // VFTABLES-NEXT: 2 | test3::D *test3::D::fn() 196 // VFTABLES-NEXT: [return adjustment (to type 'struct test3::D *'): 0 non-virtual] 197 // VFTABLES-NEXT: [this adjustment: vtordisp at -4, 0 non-virtual] 198 199 // GLOBALS-LABEL: @"\01??_7D@test3@@6B@" = {{.*}} constant [3 x i8*] 200 // GLOBALS: @"\01?fn@D@test3@@$4PPPPPPPM@A@AEPAUA@2@XZ" 201 // GLOBALS: @"\01?fn@D@test3@@$4PPPPPPPM@A@AEPAUB@2@XZ" 202 // GLOBALS: @"\01?fn@D@test3@@$4PPPPPPPM@A@AEPAU12@XZ" 203 } 204
