| 1 | // RUN: %clang_cc1 %s -fno-rtti -std=c++11 -Wno-inaccessible-base -triple=i386-pc-win32 -emit-llvm -o %t |
| 2 | // RUN: FileCheck %s < %t |
| 3 | // RUN: FileCheck --check-prefix=CHECK2 %s < %t |
| 4 | |
| 5 | // For now, just make sure x86_64 doesn't crash. |
| 6 | // RUN: %clang_cc1 %s -fno-rtti -std=c++11 -Wno-inaccessible-base -triple=x86_64-pc-win32 -emit-llvm -o %t |
| 7 | |
| 8 | struct VBase { |
| 9 | virtual ~VBase(); |
| 10 | virtual void foo(); |
| 11 | virtual void bar(); |
| 12 | int field; |
| 13 | }; |
| 14 | |
| 15 | struct B : virtual VBase { |
| 16 | B(); |
| 17 | virtual ~B(); |
| 18 | virtual void foo(); |
| 19 | virtual void bar(); |
| 20 | }; |
| 21 | |
| 22 | B::B() { |
| 23 | // CHECK-LABEL: define dso_local x86_thiscallcc %struct.B* @"??0B@@QAE@XZ" |
| 24 | // CHECK: %[[THIS:.*]] = load %struct.B*, %struct.B** |
| 25 | // CHECK: br i1 %{{.*}}, label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] |
| 26 | |
| 27 | // Don't check the INIT_VBASES case as it's covered by the ctor tests. |
| 28 | |
| 29 | // CHECK: %[[SKIP_VBASES]] |
| 30 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 31 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 0 |
| 32 | // ... |
| 33 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 34 | // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 %{{.*}} |
| 35 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** |
| 36 | // CHECK: store i32 (...)** bitcast ({ [3 x i8*] }* @"??_7B@@6B@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
| 37 | |
| 38 | // Initialize vtorDisp: |
| 39 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 40 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 0 |
| 41 | // ... |
| 42 | // CHECK: %[[VBASE_OFFSET:.*]] = add nsw i32 0, %{{.*}} |
| 43 | // CHECK: %[[VTORDISP_VAL:.*]] = sub i32 %[[VBASE_OFFSET]], 8 |
| 44 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 45 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 %[[VBASE_OFFSET]] |
| 46 | // CHECK: %[[VTORDISP_i8:.*]] = getelementptr i8, i8* %[[VBASE_i8]], i32 -4 |
| 47 | // CHECK: %[[VTORDISP_PTR:.*]] = bitcast i8* %[[VTORDISP_i8]] to i32* |
| 48 | // CHECK: store i32 %[[VTORDISP_VAL]], i32* %[[VTORDISP_PTR]] |
| 49 | |
| 50 | // CHECK: ret |
| 51 | } |
| 52 | |
| 53 | B::~B() { |
| 54 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"??1B@@UAE@XZ" |
| 55 | // Store initial this: |
| 56 | // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.B* |
| 57 | // CHECK: store %struct.B* %{{.*}}, %struct.B** %[[THIS_ADDR]], align 4 |
| 58 | // Reload and adjust the this parameter: |
| 59 | // CHECK: %[[THIS_RELOAD:.*]] = load %struct.B*, %struct.B** %[[THIS_ADDR]] |
| 60 | // CHECK: %[[THIS_UNADJ_i8:.*]] = bitcast %struct.B* %[[THIS_RELOAD]] to i8* |
| 61 | // CHECK: %[[THIS_ADJ_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_UNADJ_i8]], i32 -8 |
| 62 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJ_i8]] to %struct.B* |
| 63 | |
| 64 | // Restore the vfptr that could have been changed by a subclass. |
| 65 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 66 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 0 |
| 67 | // ... |
| 68 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 69 | // CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 %{{.*}} |
| 70 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to i32 (...)*** |
| 71 | // CHECK: store i32 (...)** bitcast ({ [3 x i8*] }* @"??_7B@@6B@" to i32 (...)**), i32 (...)*** %[[VFPTR]] |
| 72 | |
| 73 | // Initialize vtorDisp: |
| 74 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 75 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 0 |
| 76 | // ... |
| 77 | // CHECK: %[[VBASE_OFFSET:.*]] = add nsw i32 0, %{{.*}} |
| 78 | // CHECK: %[[VTORDISP_VAL:.*]] = sub i32 %[[VBASE_OFFSET]], 8 |
| 79 | // CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 80 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 %[[VBASE_OFFSET]] |
| 81 | // CHECK: %[[VTORDISP_i8:.*]] = getelementptr i8, i8* %[[VBASE_i8]], i32 -4 |
| 82 | // CHECK: %[[VTORDISP_PTR:.*]] = bitcast i8* %[[VTORDISP_i8]] to i32* |
| 83 | // CHECK: store i32 %[[VTORDISP_VAL]], i32* %[[VTORDISP_PTR]] |
| 84 | |
| 85 | foo(); // Avoid the "trivial destructor" optimization. |
| 86 | |
| 87 | // CHECK: ret |
| 88 | |
| 89 | // CHECK2-LABEL: define linkonce_odr dso_local x86_thiscallcc void @"??_DB@@QAEXXZ"(%struct.B* |
| 90 | // CHECK2: %[[THIS:.*]] = load %struct.B*, %struct.B** {{.*}} |
| 91 | // CHECK2: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 92 | // CHECK2: %[[B_i8:.*]] = getelementptr i8, i8* %[[THIS_i8]], i32 8 |
| 93 | // CHECK2: %[[B:.*]] = bitcast i8* %[[B_i8]] to %struct.B* |
| 94 | // CHECK2: call x86_thiscallcc void @"??1B@@UAE@XZ"(%struct.B* %[[B]]) |
| 95 | // CHECK2: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 96 | // CHECK2: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_i8]], i32 8 |
| 97 | // CHECK2: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.VBase* |
| 98 | // CHECK2: call x86_thiscallcc void @"??1VBase@@UAE@XZ"(%struct.VBase* %[[VBASE]]) |
| 99 | // CHECK2: ret |
| 100 | |
| 101 | // CHECK2-LABEL: define linkonce_odr dso_local x86_thiscallcc i8* @"??_GB@@UAEPAXI@Z" |
| 102 | // CHECK2: store %struct.B* %{{.*}}, %struct.B** %[[THIS_ADDR:.*]], align 4 |
| 103 | // CHECK2: %[[THIS:.*]] = load %struct.B*, %struct.B** %[[THIS_ADDR]] |
| 104 | // CHECK2: %[[THIS_PARAM_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 105 | // CHECK2: %[[THIS_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_PARAM_i8:.*]], i32 -8 |
| 106 | // CHECK2: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.B* |
| 107 | // CHECK2: call x86_thiscallcc void @"??_DB@@QAEXXZ"(%struct.B* %[[THIS]]) |
| 108 | // ... |
| 109 | // CHECK2: ret |
| 110 | } |
| 111 | |
| 112 | void B::foo() { |
| 113 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"?foo@B@@UAEXXZ"(i8* |
| 114 | // |
| 115 | // B::foo gets 'this' cast to VBase* in ECX (i.e. this+8) so we |
| 116 | // need to adjust 'this' before use. |
| 117 | // |
| 118 | // Coerce this to correct type: |
| 119 | // CHECK: %[[THIS_STORE:.*]] = alloca %struct.B* |
| 120 | // CHECK: %[[THIS_ADDR:.*]] = alloca %struct.B* |
| 121 | // CHECK: %[[COERCE_VAL:.*]] = bitcast i8* %{{.*}} to %struct.B* |
| 122 | // CHECK: store %struct.B* %[[COERCE_VAL]], %struct.B** %[[THIS_STORE]], align 4 |
| 123 | // |
| 124 | // Store initial this: |
| 125 | // CHECK: %[[THIS_INIT:.*]] = load %struct.B*, %struct.B** %[[THIS_STORE]] |
| 126 | // CHECK: store %struct.B* %[[THIS_INIT]], %struct.B** %[[THIS_ADDR]], align 4 |
| 127 | // |
| 128 | // Reload and adjust the this parameter: |
| 129 | // CHECK: %[[THIS_RELOAD:.*]] = load %struct.B*, %struct.B** %[[THIS_ADDR]] |
| 130 | // CHECK: %[[THIS_UNADJ_i8:.*]] = bitcast %struct.B* %[[THIS_RELOAD]] to i8* |
| 131 | // CHECK: %[[THIS_ADJ_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_UNADJ_i8]], i32 -8 |
| 132 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJ_i8]] to %struct.B* |
| 133 | |
| 134 | field = 42; |
| 135 | // CHECK: %[[THIS8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 136 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[THIS8]], i32 0 |
| 137 | // CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i32** |
| 138 | // CHECK: %[[VBTABLE:.*]] = load i32*, i32** %[[VBPTR8]] |
| 139 | // CHECK: %[[VBENTRY:.*]] = getelementptr inbounds i32, i32* %[[VBTABLE]], i32 1 |
| 140 | // CHECK: %[[VBOFFSET32:.*]] = load i32, i32* %[[VBENTRY]] |
| 141 | // CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]] |
| 142 | // CHECK: %[[THIS8:.*]] = bitcast %struct.B* %[[THIS]] to i8* |
| 143 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS8]], i32 %[[VBOFFSET]] |
| 144 | // CHECK: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.VBase* |
| 145 | // CHECK: %[[FIELD:.*]] = getelementptr inbounds %struct.VBase, %struct.VBase* %[[VBASE]], i32 0, i32 1 |
| 146 | // CHECK: store i32 42, i32* %[[FIELD]], align 4 |
| 147 | // |
| 148 | // CHECK: ret void |
| 149 | } |
| 150 | |
| 151 | void call_vbase_bar(B *obj) { |
| 152 | // CHECK-LABEL: define dso_local void @"?call_vbase_bar@@YAXPAUB@@@Z"(%struct.B* %obj) |
| 153 | // CHECK: %[[OBJ:.*]] = load %struct.B |
| 154 | |
| 155 | obj->bar(); |
| 156 | // When calling a vbase's virtual method, one needs to adjust 'this' |
| 157 | // at the caller site. |
| 158 | // |
| 159 | // CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8* |
| 160 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 0 |
| 161 | // CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i32** |
| 162 | // CHECK: %[[VBTABLE:.*]] = load i32*, i32** %[[VBPTR8]] |
| 163 | // CHECK: %[[VBENTRY:.*]] = getelementptr inbounds i32, i32* %[[VBTABLE]], i32 1 |
| 164 | // CHECK: %[[VBOFFSET32:.*]] = load i32, i32* %[[VBENTRY]] |
| 165 | // CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]] |
| 166 | // CHECK: %[[VBASE:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 %[[VBOFFSET]] |
| 167 | // |
| 168 | // CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8* |
| 169 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 0 |
| 170 | // CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i32** |
| 171 | // CHECK: %[[VBTABLE:.*]] = load i32*, i32** %[[VBPTR8]] |
| 172 | // CHECK: %[[VBENTRY:.*]] = getelementptr inbounds i32, i32* %[[VBTABLE]], i32 1 |
| 173 | // CHECK: %[[VBOFFSET32:.*]] = load i32, i32* %[[VBENTRY]] |
| 174 | // CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]] |
| 175 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 %[[VBOFFSET]] |
| 176 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VBASE_i8]] to void (i8*)*** |
| 177 | // CHECK: %[[VFTABLE:.*]] = load void (i8*)**, void (i8*)*** %[[VFPTR]] |
| 178 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds void (i8*)*, void (i8*)** %[[VFTABLE]], i64 2 |
| 179 | // CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)*, void (i8*)** %[[VFUN]] |
| 180 | // |
| 181 | // CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[VBASE]]) |
| 182 | // |
| 183 | // CHECK: ret void |
| 184 | } |
| 185 | |
| 186 | void delete_B(B *obj) { |
| 187 | // CHECK-LABEL: define dso_local void @"?delete_B@@YAXPAUB@@@Z"(%struct.B* %obj) |
| 188 | // CHECK: %[[OBJ:.*]] = load %struct.B |
| 189 | |
| 190 | delete obj; |
| 191 | // CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8* |
| 192 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 0 |
| 193 | // CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i32** |
| 194 | // CHECK: %[[VBTABLE:.*]] = load i32*, i32** %[[VBPTR8]] |
| 195 | // CHECK: %[[VBENTRY:.*]] = getelementptr inbounds i32, i32* %[[VBTABLE]], i32 1 |
| 196 | // CHECK: %[[VBOFFSET32:.*]] = load i32, i32* %[[VBENTRY]] |
| 197 | // CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]] |
| 198 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 %[[VBOFFSET]] |
| 199 | // CHECK: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.B* |
| 200 | // |
| 201 | // CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8* |
| 202 | // CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 0 |
| 203 | // CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i32** |
| 204 | // CHECK: %[[VBTABLE:.*]] = load i32*, i32** %[[VBPTR8]] |
| 205 | // CHECK: %[[VBENTRY:.*]] = getelementptr inbounds i32, i32* %[[VBTABLE]], i32 1 |
| 206 | // CHECK: %[[VBOFFSET32:.*]] = load i32, i32* %[[VBENTRY]] |
| 207 | // CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]] |
| 208 | // CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 %[[VBOFFSET]] |
| 209 | // CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VBASE_i8]] to i8* (%struct.B*, i32)*** |
| 210 | // CHECK: %[[VFTABLE:.*]] = load i8* (%struct.B*, i32)**, i8* (%struct.B*, i32)*** %[[VFPTR]] |
| 211 | // CHECK: %[[VFUN:.*]] = getelementptr inbounds i8* (%struct.B*, i32)*, i8* (%struct.B*, i32)** %[[VFTABLE]], i64 0 |
| 212 | // CHECK: %[[VFUN_VALUE:.*]] = load i8* (%struct.B*, i32)*, i8* (%struct.B*, i32)** %[[VFUN]] |
| 213 | // |
| 214 | // CHECK: call x86_thiscallcc i8* %[[VFUN_VALUE]](%struct.B* %[[VBASE]], i32 1) |
| 215 | // CHECK: ret void |
| 216 | } |
| 217 | |
| 218 | void call_complete_dtor() { |
| 219 | // CHECK-LABEL: define dso_local void @"?call_complete_dtor@@YAXXZ" |
| 220 | B b; |
| 221 | // CHECK: call x86_thiscallcc %struct.B* @"??0B@@QAE@XZ"(%struct.B* %[[B:.*]], i32 1) |
| 222 | // CHECK-NOT: getelementptr |
| 223 | // CHECK: call x86_thiscallcc void @"??_DB@@QAEXXZ"(%struct.B* %[[B]]) |
| 224 | // CHECK: ret |
| 225 | } |
| 226 | |
| 227 | struct C : B { |
| 228 | C(); |
| 229 | // has an implicit vdtor. |
| 230 | }; |
| 231 | |
| 232 | // Used to crash on an assertion. |
| 233 | C::C() { |
| 234 | // CHECK-LABEL: define dso_local x86_thiscallcc %struct.C* @"??0C@@QAE@XZ" |
| 235 | } |
| 236 | |
| 237 | namespace multiple_vbases { |
| 238 | struct A { |
| 239 | virtual void a(); |
| 240 | }; |
| 241 | |
| 242 | struct B { |
| 243 | virtual void b(); |
| 244 | }; |
| 245 | |
| 246 | struct C { |
| 247 | virtual void c(); |
| 248 | }; |
| 249 | |
| 250 | struct D : virtual A, virtual B, virtual C { |
| 251 | virtual void a(); |
| 252 | virtual void b(); |
| 253 | virtual void c(); |
| 254 | D(); |
| 255 | }; |
| 256 | |
| 257 | D::D() { |
| 258 | // CHECK-LABEL: define dso_local x86_thiscallcc %"struct.multiple_vbases::D"* @"??0D@multiple_vbases@@QAE@XZ" |
| 259 | // Just make sure we emit 3 vtordisps after initializing vfptrs. |
| 260 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7D@multiple_vbases@@6BA@1@@" to i32 (...)**), i32 (...)*** %{{.*}} |
| 261 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7D@multiple_vbases@@6BB@1@@" to i32 (...)**), i32 (...)*** %{{.*}} |
| 262 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7D@multiple_vbases@@6BC@1@@" to i32 (...)**), i32 (...)*** %{{.*}} |
| 263 | // ... |
| 264 | // CHECK: store i32 %{{.*}}, i32* %{{.*}} |
| 265 | // CHECK: store i32 %{{.*}}, i32* %{{.*}} |
| 266 | // CHECK: store i32 %{{.*}}, i32* %{{.*}} |
| 267 | // CHECK: ret |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | namespace diamond { |
| 272 | struct A { |
| 273 | A(); |
| 274 | virtual ~A(); |
| 275 | }; |
| 276 | |
| 277 | struct B : virtual A { |
| 278 | B(); |
| 279 | ~B(); |
| 280 | }; |
| 281 | |
| 282 | struct C : virtual A { |
| 283 | C(); |
| 284 | ~C(); |
| 285 | int c1, c2, c3; |
| 286 | }; |
| 287 | |
| 288 | struct Z { |
| 289 | int z; |
| 290 | }; |
| 291 | |
| 292 | struct D : virtual Z, B, C { |
| 293 | D(); |
| 294 | ~D(); |
| 295 | } d; |
| 296 | |
| 297 | D::~D() { |
| 298 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"??1D@diamond@@UAE@XZ"(%"struct.diamond::D"*{{.*}}) |
| 299 | // Store initial this: |
| 300 | // CHECK: %[[THIS_ADDR:.*]] = alloca %"struct.diamond::D"* |
| 301 | // CHECK: store %"struct.diamond::D"* %{{.*}}, %"struct.diamond::D"** %[[THIS_ADDR]], align 4 |
| 302 | // |
| 303 | // Reload and adjust the this parameter: |
| 304 | // CHECK: %[[THIS_RELOAD:.*]] = load %"struct.diamond::D"*, %"struct.diamond::D"** %[[THIS_ADDR]] |
| 305 | // CHECK: %[[THIS_UNADJ_i8:.*]] = bitcast %"struct.diamond::D"* %[[THIS_RELOAD]] to i8* |
| 306 | // CHECK: %[[THIS_ADJ_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_UNADJ_i8]], i32 -24 |
| 307 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJ_i8]] to %"struct.diamond::D"* |
| 308 | // |
| 309 | // CHECK: %[[D_i8:.*]] = bitcast %"struct.diamond::D"* %[[THIS]] to i8* |
| 310 | // CHECK: %[[C_i8:.*]] = getelementptr inbounds i8, i8* %[[D_i8]], i32 4 |
| 311 | // CHECK: %[[C:.*]] = bitcast i8* %[[C_i8]] to %"struct.diamond::C"* |
| 312 | // CHECK: %[[C_i8:.*]] = bitcast %"struct.diamond::C"* %[[C]] to i8* |
| 313 | // CHECK: %[[ARG_i8:.*]] = getelementptr i8, i8* %{{.*}}, i32 16 |
| 314 | // FIXME: We might consider changing the dtor this parameter type to i8*. |
| 315 | // CHECK: %[[ARG:.*]] = bitcast i8* %[[ARG_i8]] to %"struct.diamond::C"* |
| 316 | // CHECK: call x86_thiscallcc void @"??1C@diamond@@UAE@XZ"(%"struct.diamond::C"* %[[ARG]]) |
| 317 | |
| 318 | // CHECK: %[[B:.*]] = bitcast %"struct.diamond::D"* %[[THIS]] to %"struct.diamond::B"* |
| 319 | // CHECK: %[[B_i8:.*]] = bitcast %"struct.diamond::B"* %[[B]] to i8* |
| 320 | // CHECK: %[[ARG_i8:.*]] = getelementptr i8, i8* %[[B_i8]], i32 4 |
| 321 | // CHECK: %[[ARG:.*]] = bitcast i8* %[[ARG_i8]] to %"struct.diamond::B"* |
| 322 | // CHECK: call x86_thiscallcc void @"??1B@diamond@@UAE@XZ"(%"struct.diamond::B"* %[[ARG]]) |
| 323 | // CHECK: ret void |
| 324 | } |
| 325 | |
| 326 | } |
| 327 | |
| 328 | namespace test2 { |
| 329 | struct A { A(); }; |
| 330 | struct B : virtual A { B() {} }; |
| 331 | struct C : B, A { C() {} }; |
| 332 | |
| 333 | // PR18435: Order mattered here. We were generating code for the delegating |
| 334 | // call to B() from C(). |
| 335 | void callC() { C x; } |
| 336 | |
| 337 | // CHECK-LABEL: define linkonce_odr dso_local x86_thiscallcc %"struct.test2::C"* @"??0C@test2@@QAE@XZ" |
| 338 | // CHECK: (%"struct.test2::C"* returned %this, i32 %is_most_derived) |
| 339 | // CHECK: br i1 |
| 340 | // Virtual bases |
| 341 | // CHECK: call x86_thiscallcc %"struct.test2::A"* @"??0A@test2@@QAE@XZ"(%"struct.test2::A"* %{{.*}}) |
| 342 | // CHECK: br label |
| 343 | // Non-virtual bases |
| 344 | // CHECK: call x86_thiscallcc %"struct.test2::B"* @"??0B@test2@@QAE@XZ"(%"struct.test2::B"* %{{.*}}, i32 0) |
| 345 | // CHECK: call x86_thiscallcc %"struct.test2::A"* @"??0A@test2@@QAE@XZ"(%"struct.test2::A"* %{{.*}}) |
| 346 | // CHECK: ret |
| 347 | |
| 348 | // CHECK2-LABEL: define linkonce_odr dso_local x86_thiscallcc %"struct.test2::B"* @"??0B@test2@@QAE@XZ" |
| 349 | // CHECK2: (%"struct.test2::B"* returned %this, i32 %is_most_derived) |
| 350 | // CHECK2: call x86_thiscallcc %"struct.test2::A"* @"??0A@test2@@QAE@XZ"(%"struct.test2::A"* %{{.*}}) |
| 351 | // CHECK2: ret |
| 352 | |
| 353 | } |
| 354 | |
| 355 | namespace test3 { |
| 356 | // PR19104: A non-virtual call of a virtual method doesn't use vftable thunks, |
| 357 | // so requires only static adjustment which is different to the one used |
| 358 | // for virtual calls. |
| 359 | struct A { |
| 360 | virtual void foo(); |
| 361 | }; |
| 362 | |
| 363 | struct B : virtual A { |
| 364 | virtual void bar(); |
| 365 | }; |
| 366 | |
| 367 | struct C : virtual A { |
| 368 | virtual void foo(); |
| 369 | }; |
| 370 | |
| 371 | struct D : B, C { |
| 372 | virtual void bar(); |
| 373 | int field; // Laid out between C and A subobjects in D. |
| 374 | }; |
| 375 | |
| 376 | void D::bar() { |
| 377 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"?bar@D@test3@@UAEXXZ"(%"struct.test3::D"* %this) |
| 378 | |
| 379 | C::foo(); |
| 380 | // Shouldn't need any vbtable lookups. All we have to do is adjust to C*, |
| 381 | // then compensate for the adjustment performed in the C::foo() prologue. |
| 382 | // CHECK-NOT: load i8*, i8** |
| 383 | // CHECK: %[[OBJ_i8:.*]] = bitcast %"struct.test3::D"* %{{.*}} to i8* |
| 384 | // CHECK: %[[C_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 8 |
| 385 | // CHECK: %[[C:.*]] = bitcast i8* %[[C_i8]] to %"struct.test3::C"* |
| 386 | // CHECK: %[[C_i8:.*]] = bitcast %"struct.test3::C"* %[[C]] to i8* |
| 387 | // CHECK: %[[ARG:.*]] = getelementptr i8, i8* %[[C_i8]], i32 4 |
| 388 | // CHECK: call x86_thiscallcc void @"?foo@C@test3@@UAEXXZ"(i8* %[[ARG]]) |
| 389 | // CHECK: ret |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | namespace test4{ |
| 394 | // PR19172: We used to merge method vftable locations wrong. |
| 395 | |
| 396 | struct A { |
| 397 | virtual ~A() {} |
| 398 | }; |
| 399 | |
| 400 | struct B { |
| 401 | virtual ~B() {} |
| 402 | }; |
| 403 | |
| 404 | struct C : virtual A, B { |
| 405 | virtual ~C(); |
| 406 | }; |
| 407 | |
| 408 | void foo(void*); |
| 409 | |
| 410 | C::~C() { |
| 411 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"??1C@test4@@UAE@XZ"(%"struct.test4::C"* %this) |
| 412 | |
| 413 | // In this case "this" points to the most derived class, so no GEPs needed. |
| 414 | // CHECK-NOT: getelementptr |
| 415 | // CHECK-NOT: bitcast |
| 416 | // CHECK: %[[VFPTR_i8:.*]] = bitcast %"struct.test4::C"* %{{.*}} to i32 (...)*** |
| 417 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7C@test4@@6BB@1@@" to i32 (...)**), i32 (...)*** %[[VFPTR_i8]] |
| 418 | |
| 419 | foo(this); |
| 420 | // CHECK: ret |
| 421 | } |
| 422 | |
| 423 | void destroy(C *obj) { |
| 424 | // CHECK-LABEL: define dso_local void @"?destroy@test4@@YAXPAUC@1@@Z"(%"struct.test4::C"* %obj) |
| 425 | |
| 426 | delete obj; |
| 427 | // CHECK: %[[VPTR:.*]] = bitcast %"struct.test4::C"* %[[OBJ:.*]] to i8* (%"struct.test4::C"*, i32)*** |
| 428 | // CHECK: %[[VFTABLE:.*]] = load i8* (%"struct.test4::C"*, i32)**, i8* (%"struct.test4::C"*, i32)*** %[[VPTR]] |
| 429 | // CHECK: %[[VFTENTRY:.*]] = getelementptr inbounds i8* (%"struct.test4::C"*, i32)*, i8* (%"struct.test4::C"*, i32)** %[[VFTABLE]], i64 0 |
| 430 | // CHECK: %[[VFUN:.*]] = load i8* (%"struct.test4::C"*, i32)*, i8* (%"struct.test4::C"*, i32)** %[[VFTENTRY]] |
| 431 | // CHECK: call x86_thiscallcc i8* %[[VFUN]](%"struct.test4::C"* %[[OBJ]], i32 1) |
| 432 | // CHECK: ret |
| 433 | } |
| 434 | |
| 435 | struct D { |
| 436 | virtual void d(); |
| 437 | }; |
| 438 | |
| 439 | // The first non-virtual base doesn't have a vdtor, |
| 440 | // but "this adjustment" is not needed. |
| 441 | struct E : D, B, virtual A { |
| 442 | virtual ~E(); |
| 443 | }; |
| 444 | |
| 445 | E::~E() { |
| 446 | // CHECK-LABEL: define dso_local x86_thiscallcc void @"??1E@test4@@UAE@XZ"(%"struct.test4::E"* %this) |
| 447 | |
| 448 | // In this case "this" points to the most derived class, so no GEPs needed. |
| 449 | // CHECK-NOT: getelementptr |
| 450 | // CHECK-NOT: bitcast |
| 451 | // CHECK: %[[VFPTR_i8:.*]] = bitcast %"struct.test4::E"* %{{.*}} to i32 (...)*** |
| 452 | // CHECK: store i32 (...)** bitcast ({ [1 x i8*] }* @"??_7E@test4@@6BD@1@@" to i32 (...)**), i32 (...)*** %[[VFPTR_i8]] |
| 453 | foo(this); |
| 454 | } |
| 455 | |
| 456 | void destroy(E *obj) { |
| 457 | // CHECK-LABEL: define dso_local void @"?destroy@test4@@YAXPAUE@1@@Z"(%"struct.test4::E"* %obj) |
| 458 | |
| 459 | // CHECK-NOT: getelementptr |
| 460 | // CHECK: %[[OBJ_i8:.*]] = bitcast %"struct.test4::E"* %[[OBJ]] to i8* |
| 461 | // CHECK: %[[B_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 4 |
| 462 | // FIXME: in fact, the call should take i8* and the bitcast is redundant. |
| 463 | // CHECK: %[[B_as_E:.*]] = bitcast i8* %[[B_i8]] to %"struct.test4::E"* |
| 464 | // CHECK: %[[OBJ_i8:.*]] = bitcast %"struct.test4::E"* %[[OBJ:.*]] to i8* |
| 465 | // CHECK: %[[B_i8:.*]] = getelementptr inbounds i8, i8* %[[OBJ_i8]], i32 4 |
| 466 | // CHECK: %[[VPTR:.*]] = bitcast i8* %[[B_i8]] to i8* (%"struct.test4::E"*, i32)*** |
| 467 | // CHECK: %[[VFTABLE:.*]] = load i8* (%"struct.test4::E"*, i32)**, i8* (%"struct.test4::E"*, i32)*** %[[VPTR]] |
| 468 | // CHECK: %[[VFTENTRY:.*]] = getelementptr inbounds i8* (%"struct.test4::E"*, i32)*, i8* (%"struct.test4::E"*, i32)** %[[VFTABLE]], i64 0 |
| 469 | // CHECK: %[[VFUN:.*]] = load i8* (%"struct.test4::E"*, i32)*, i8* (%"struct.test4::E"*, i32)** %[[VFTENTRY]] |
| 470 | // CHECK: call x86_thiscallcc i8* %[[VFUN]](%"struct.test4::E"* %[[B_as_E]], i32 1) |
| 471 | delete obj; |
| 472 | } |
| 473 | |
| 474 | } |
| 475 | |
| 476 | namespace test5 { |
| 477 | // PR25370: Don't zero-initialize vbptrs in virtual bases. |
| 478 | struct A { |
| 479 | virtual void f(); |
| 480 | }; |
| 481 | |
| 482 | struct B : virtual A { |
| 483 | int Field; |
| 484 | }; |
| 485 | |
| 486 | struct C : B { |
| 487 | C(); |
| 488 | }; |
| 489 | |
| 490 | C::C() : B() {} |
| 491 | // CHECK-LABEL: define dso_local x86_thiscallcc %"struct.test5::C"* @"??0C@test5@@QAE@XZ"( |
| 492 | // CHECK: %[[THIS:.*]] = load %"struct.test5::C"*, %"struct.test5::C"** |
| 493 | // CHECK: br i1 %{{.*}}, label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] |
| 494 | |
| 495 | // CHECK: %[[SKIP_VBASES]] |
| 496 | // CHECK: %[[B:.*]] = bitcast %"struct.test5::C"* %[[THIS]] to %"struct.test5::B"* |
| 497 | // CHECK: %[[B_i8:.*]] = bitcast %"struct.test5::B"* %[[B]] to i8* |
| 498 | // CHECK: %[[FIELD:.*]] = getelementptr inbounds i8, i8* %[[B_i8]], i32 4 |
| 499 | // CHECK: call void @llvm.memset.p0i8.i32(i8* align 4 %[[FIELD]], i8 0, i32 4, i1 false) |
| 500 | } |
| 501 | |
| 502 | namespace pr27621 { |
| 503 | // Devirtualization through a static_cast used to make us compute the 'this' |
| 504 | // adjustment for B::g instead of C::g. When we directly call C::g, 'this' is a |
| 505 | // B*, and the prologue of C::g will adjust it to a C*. |
| 506 | struct A { virtual void f(); }; |
| 507 | struct B { virtual void g(); }; |
| 508 | struct C final : A, B { |
| 509 | virtual void h(); |
| 510 | void g() override; |
| 511 | }; |
| 512 | void callit(C *p) { |
| 513 | static_cast<B*>(p)->g(); |
| 514 | } |
| 515 | // CHECK-LABEL: define dso_local void @"?callit@pr27621@@YAXPAUC@1@@Z"(%"struct.pr27621::C"* %{{.*}}) |
| 516 | // CHECK: %[[B_i8:.*]] = getelementptr i8, i8* %{{.*}}, i32 4 |
| 517 | // CHECK: call x86_thiscallcc void @"?g@C@pr27621@@UAEXXZ"(i8* %[[B_i8]]) |
| 518 | } |
| 519 | |
| 520 | namespace test6 { |
| 521 | class A {}; |
| 522 | class B : virtual A {}; |
| 523 | class C : virtual B { |
| 524 | virtual void m_fn1(); |
| 525 | float field; |
| 526 | }; |
| 527 | class D : C { |
| 528 | D(); |
| 529 | }; |
| 530 | D::D() : C() {} |
| 531 | // CHECK-LABEL: define dso_local x86_thiscallcc %"class.test6::D"* @"??0D@test6@@AAE@XZ"( |
| 532 | // CHECK: %[[THIS:.*]] = load %"class.test6::D"*, %"class.test6::D"** |
| 533 | // CHECK: br i1 %{{.*}}, label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]] |
| 534 | |
| 535 | // CHECK: %[[SKIP_VBASES]] |
| 536 | // CHECK: %[[C:.*]] = bitcast %"class.test6::D"* %[[THIS]] to %"class.test6::C"* |
| 537 | // CHECK: %[[C_i8:.*]] = bitcast %"class.test6::C"* %[[C]] to i8* |
| 538 | // CHECK: %[[FIELD:.*]] = getelementptr inbounds i8, i8* %[[C_i8]], i32 8 |
| 539 | // CHECK: call void @llvm.memset.p0i8.i32(i8* align 4 %[[FIELD]], i8 0, i32 4, i1 false) |
| 540 | } |
| 541 | |
| 542 | namespace pr36921 { |
| 543 | struct A { |
| 544 | virtual ~A() {} |
| 545 | }; |
| 546 | struct B { |
| 547 | virtual ~B() {} |
| 548 | }; |
| 549 | struct C : virtual B {}; |
| 550 | struct D : virtual A, C {}; |
| 551 | D d; |
| 552 | // CHECK-LABEL: define linkonce_odr dso_local x86_thiscallcc i8* @"??_GD@pr36921@@UAEPAXI@Z"( |
| 553 | // CHECK: %[[THIS:.*]] = load %"struct.pr36921::D"*, %"struct.pr36921::D"** |
| 554 | // CHECK: %[[THIS_UNADJ_i8:.*]] = bitcast %"struct.pr36921::D"* %[[THIS_RELOAD]] to i8* |
| 555 | // CHECK: %[[THIS_ADJ_i8:.*]] = getelementptr inbounds i8, i8* %[[THIS_UNADJ_i8]], i32 -4 |
| 556 | // CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_ADJ_i8]] to %"struct.pr36921::D"* |
| 557 | } |
| 558 | |