Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1 | // RUN: %clang_cc1 %s -fno-rtti -triple=i386-pc-win32 -emit-llvm -o %t.ll -fdump-vtable-layouts >%t |
| 2 | // RUN: FileCheck %s < %t |
| 3 | // RUN: FileCheck --check-prefix=MANGLING %s < %t.ll |
| 4 | |
| 5 | namespace test1 { |
| 6 | struct A { |
| 7 | virtual void f(); |
| 8 | }; |
| 9 | |
| 10 | struct B { |
| 11 | virtual void g(); |
| 12 | // Add an extra virtual method so it's easier to check for the absence of thunks. |
| 13 | virtual void h(); |
| 14 | }; |
| 15 | |
| 16 | struct X : A, B { |
| 17 | // CHECK-LABEL: VFTable for 'test1::A' in 'test1::X' (1 entry) |
| 18 | // CHECK-NEXT: 0 | void test1::X::f() |
| 19 | |
| 20 | // CHECK-LABEL: VFTable for 'test1::B' in 'test1::X' (2 entries) |
| 21 | // CHECK-NEXT: 0 | void test1::B::g() |
| 22 | // CHECK-NEXT: 1 | void test1::B::h() |
| 23 | |
| 24 | // CHECK-LABEL: VFTable indices for 'test1::X' (1 entry) |
| 25 | // CHECK-NEXT: 0 | void test1::X::f() |
| 26 | |
| 27 | // MANGLING-DAG: @"\01??_7X@test1@@6BA@1@@" |
| 28 | // MANGLING-DAG: @"\01??_7X@test1@@6BB@1@@" |
| 29 | |
| 30 | // Overrides only the left child's method (A::f), needs no thunks. |
| 31 | virtual void f(); |
| 32 | } x; |
| 33 | |
| 34 | void build_vftable(X *obj) { obj->f(); } |
| 35 | } |
| 36 | |
| 37 | namespace test2 { |
| 38 | struct A { |
| 39 | virtual void f(); |
| 40 | }; |
| 41 | |
| 42 | struct B { |
| 43 | virtual void g(); |
| 44 | virtual void h(); |
| 45 | }; |
| 46 | |
| 47 | struct X : A, B { |
| 48 | // CHECK-LABEL: VFTable for 'test2::A' in 'test2::X' (1 entry) |
| 49 | // CHECK-NEXT: 0 | void test2::A::f() |
| 50 | |
| 51 | // CHECK-LABEL: VFTable for 'test2::B' in 'test2::X' (2 entries) |
| 52 | // CHECK-NEXT: 0 | void test2::X::g() |
| 53 | // CHECK-NEXT: 1 | void test2::B::h() |
| 54 | |
| 55 | // CHECK-LABEL: VFTable indices for 'test2::X' (1 entry). |
| 56 | // CHECK-NEXT: via vfptr at offset 4 |
| 57 | // CHECK-NEXT: 0 | void test2::X::g() |
| 58 | |
| 59 | // Overrides only the right child's method (B::g), needs this adjustment but |
| 60 | // not thunks. |
| 61 | virtual void g(); |
| 62 | }; |
| 63 | |
| 64 | void build_vftable(X *obj) { obj->g(); } |
| 65 | } |
| 66 | |
| 67 | namespace test3 { |
| 68 | struct A { |
| 69 | virtual void f(); |
| 70 | }; |
| 71 | |
| 72 | struct B { |
| 73 | virtual void g(); |
| 74 | virtual void h(); |
| 75 | }; |
| 76 | |
| 77 | struct X : A, B { |
| 78 | // CHECK-LABEL: VFTable for 'test3::A' in 'test3::X' (2 entries) |
| 79 | // CHECK-NEXT: 0 | void test3::A::f() |
| 80 | // CHECK-NEXT: 1 | void test3::X::i() |
| 81 | |
| 82 | // CHECK-LABEL: VFTable for 'test3::B' in 'test3::X' (2 entries) |
| 83 | // CHECK-NEXT: 0 | void test3::B::g() |
| 84 | // CHECK-NEXT: 1 | void test3::B::h() |
| 85 | |
| 86 | // CHECK-LABEL: VFTable indices for 'test3::X' (1 entry). |
| 87 | // CHECK-NEXT: 1 | void test3::X::i() |
| 88 | |
| 89 | // Only adds a new method. |
| 90 | virtual void i(); |
| 91 | }; |
| 92 | |
| 93 | void build_vftable(X *obj) { obj->i(); } |
| 94 | } |
| 95 | |
| 96 | namespace test4 { |
| 97 | struct A { |
| 98 | virtual void f(); |
| 99 | }; |
| 100 | |
| 101 | struct Empty { }; // Doesn't have a vftable! |
| 102 | |
| 103 | // Only the right base has a vftable, so it's laid out before the left one! |
| 104 | struct X : Empty, A { |
| 105 | // CHECK-LABEL: VFTable for 'test4::A' in 'test4::X' (1 entry) |
| 106 | // CHECK-NEXT: 0 | void test4::X::f() |
| 107 | |
| 108 | // CHECK-LABEL: VFTable indices for 'test4::X' (1 entry). |
| 109 | // CHECK-NEXT: 0 | void test4::X::f() |
| 110 | |
| 111 | // MANGLING-DAG: @"\01??_7X@test4@@6B@" |
| 112 | |
| 113 | virtual void f(); |
| 114 | } x; |
| 115 | |
| 116 | void build_vftable(X *obj) { obj->f(); } |
| 117 | } |
| 118 | |
| 119 | namespace test5 { |
| 120 | struct A { |
| 121 | virtual void f(); |
| 122 | }; |
| 123 | |
| 124 | struct B { |
| 125 | virtual void g(); |
| 126 | virtual void h(); |
| 127 | }; |
| 128 | |
| 129 | struct C : A, B { |
| 130 | virtual void f(); |
| 131 | }; |
| 132 | |
| 133 | struct X : C { |
| 134 | // CHECK-LABEL: VFTable for 'test5::A' in 'test5::C' in 'test5::X' (1 entry). |
| 135 | // CHECK-NEXT: 0 | void test5::X::f() |
| 136 | |
| 137 | // CHECK-LABEL: VFTable for 'test5::B' in 'test5::C' in 'test5::X' (2 entries). |
| 138 | // CHECK-NEXT: 0 | void test5::B::g() |
| 139 | // CHECK-NEXT: 1 | void test5::B::h() |
| 140 | |
| 141 | // CHECK-LABEL: VFTable indices for 'test5::X' (1 entry). |
| 142 | // CHECK-NEXT: 0 | void test5::X::f() |
| 143 | |
| 144 | // MANGLING-DAG: @"\01??_7X@test5@@6BA@1@@" |
| 145 | // MANGLING-DAG: @"\01??_7X@test5@@6BB@1@@" |
| 146 | |
| 147 | // Overrides both C::f and A::f. |
| 148 | virtual void f(); |
| 149 | } x; |
| 150 | |
| 151 | void build_vftable(X *obj) { obj->f(); } |
| 152 | } |
| 153 | |
| 154 | namespace test6 { |
| 155 | struct A { |
| 156 | virtual void f(); |
| 157 | }; |
| 158 | |
| 159 | struct B { |
| 160 | virtual void g(); |
| 161 | virtual void h(); |
| 162 | }; |
| 163 | |
| 164 | struct C : A, B { |
| 165 | virtual void g(); |
| 166 | }; |
| 167 | |
| 168 | struct X : C { |
| 169 | // CHECK-LABEL: VFTable for 'test6::A' in 'test6::C' in 'test6::X' (1 entry). |
| 170 | // CHECK-NEXT: 0 | void test6::A::f() |
| 171 | |
| 172 | // CHECK-LABEL: VFTable for 'test6::B' in 'test6::C' in 'test6::X' (2 entries). |
| 173 | // CHECK-NEXT: 0 | void test6::X::g() |
| 174 | // CHECK-NEXT: 1 | void test6::B::h() |
| 175 | |
| 176 | // CHECK-LABEL: VFTable indices for 'test6::X' (1 entry). |
| 177 | // CHECK-NEXT: via vfptr at offset 4 |
| 178 | // CHECK-NEXT: 0 | void test6::X::g() |
| 179 | |
| 180 | // Overrides both C::g and B::g. |
| 181 | virtual void g(); |
| 182 | }; |
| 183 | |
| 184 | void build_vftable(X *obj) { obj->g(); } |
| 185 | } |
| 186 | |
| 187 | namespace test7 { |
| 188 | struct A { |
| 189 | virtual void f(); |
| 190 | }; |
| 191 | |
| 192 | struct B { |
| 193 | virtual void g(); |
| 194 | virtual void h(); |
| 195 | }; |
| 196 | |
| 197 | struct C : A, B { |
| 198 | // Only adds a new method. |
| 199 | virtual void i(); |
| 200 | }; |
| 201 | |
| 202 | struct X : C { |
| 203 | // CHECK-LABEL: VFTable for 'test7::A' in 'test7::C' in 'test7::X' (2 entries). |
| 204 | // CHECK-NEXT: 0 | void test7::A::f() |
| 205 | // CHECK-NEXT: 1 | void test7::C::i() |
| 206 | |
| 207 | // CHECK-LABEL: VFTable for 'test7::B' in 'test7::C' in 'test7::X' (2 entries). |
| 208 | // CHECK-NEXT: 0 | void test7::X::g() |
| 209 | // CHECK-NEXT: 1 | void test7::B::h() |
| 210 | |
| 211 | // CHECK-LABEL: VFTable indices for 'test7::X' (1 entry). |
| 212 | // CHECK-NEXT: via vfptr at offset 4 |
| 213 | // CHECK-NEXT: 0 | void test7::X::g() |
| 214 | |
| 215 | // Overrides grandparent's B::g. |
| 216 | virtual void g(); |
| 217 | }; |
| 218 | |
| 219 | void build_vftable(X *obj) { obj->g(); } |
| 220 | } |
| 221 | |
| 222 | namespace test8 { |
| 223 | struct A { |
| 224 | virtual void f(); |
| 225 | }; |
| 226 | |
| 227 | struct B : A { |
| 228 | virtual void g(); |
| 229 | }; |
| 230 | |
| 231 | // There are two 'A' subobjects in this class. |
| 232 | struct X : A, B { |
| 233 | // CHECK-LABEL: VFTable for 'test8::A' in 'test8::X' (2 entries). |
| 234 | // CHECK-NEXT: 0 | void test8::A::f() |
| 235 | // CHECK-NEXT: 1 | void test8::X::h() |
| 236 | |
| 237 | // CHECK-LABEL: VFTable for 'test8::A' in 'test8::B' in 'test8::X' (2 entries). |
| 238 | // CHECK-NEXT: 0 | void test8::A::f() |
| 239 | // CHECK-NEXT: 1 | void test8::B::g() |
| 240 | |
| 241 | // CHECK-LABEL: VFTable indices for 'test8::X' (1 entry). |
| 242 | // CHECK-NEXT: 1 | void test8::X::h() |
| 243 | |
| 244 | // MANGLING-DAG: @"\01??_7X@test8@@6BA@1@@" |
| 245 | // MANGLING-DAG: @"\01??_7X@test8@@6BB@1@@" |
| 246 | |
| 247 | virtual void h(); |
| 248 | } x; |
| 249 | |
| 250 | void build_vftable(X *obj) { obj->h(); } |
| 251 | } |
| 252 | |
| 253 | namespace test9 { |
| 254 | struct A { |
| 255 | virtual void f(); |
| 256 | }; |
| 257 | |
| 258 | struct B { |
| 259 | virtual void g(); |
| 260 | virtual void h(); |
| 261 | }; |
| 262 | |
| 263 | struct C : A, B { |
| 264 | // Overrides only the left child's method (A::f). |
| 265 | virtual void f(); |
| 266 | }; |
| 267 | |
| 268 | struct D : A, B { |
| 269 | // Overrides only the right child's method (B::g). |
| 270 | virtual void g(); |
| 271 | }; |
| 272 | |
| 273 | // 2-level structure with repeating subobject types, but no thunks needed. |
| 274 | struct X : C, D { |
| 275 | // CHECK-LABEL: VFTable for 'test9::A' in 'test9::C' in 'test9::X' (2 entries) |
| 276 | // CHECK-NEXT: 0 | void test9::C::f() |
| 277 | // CHECK-NEXT: 1 | void test9::X::z() |
| 278 | |
| 279 | // CHECK-LABEL: VFTable for 'test9::B' in 'test9::C' in 'test9::X' (2 entries) |
| 280 | // CHECK-NEXT: 0 | void test9::B::g() |
| 281 | // CHECK-NEXT: 1 | void test9::B::h() |
| 282 | |
| 283 | // CHECK-LABEL: VFTable for 'test9::A' in 'test9::D' in 'test9::X' (1 entry) |
| 284 | // CHECK-NEXT: 0 | void test9::A::f() |
| 285 | |
| 286 | // CHECK-LABEL: VFTable for 'test9::B' in 'test9::D' in 'test9::X' (2 entries) |
| 287 | // CHECK-NEXT: 0 | void test9::D::g() |
| 288 | // CHECK-NEXT: 1 | void test9::B::h() |
| 289 | |
| 290 | // CHECK-LABEL: VFTable indices for 'test9::X' (1 entry). |
| 291 | // CHECK-NEXT: 1 | void test9::X::z() |
| 292 | |
| 293 | // MANGLING-DAG: @"\01??_7X@test9@@6BA@1@C@1@@" |
| 294 | // MANGLING-DAG: @"\01??_7X@test9@@6BA@1@D@1@@" |
| 295 | // MANGLING-DAG: @"\01??_7X@test9@@6BB@1@C@1@@" |
| 296 | // MANGLING-DAG: @"\01??_7X@test9@@6BB@1@D@1@@" |
| 297 | |
| 298 | virtual void z(); |
| 299 | } x; |
| 300 | |
| 301 | void build_vftable(test9::X *obj) { obj->z(); } |
| 302 | } |