1 // RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s 2 3 struct A { 4 virtual ~A(); 5 }; 6 7 struct B : A { }; 8 9 struct C { 10 int i; 11 B b; 12 }; 13 14 // CHECK: _Z15test_value_initv 15 void test_value_init() { 16 // This value initialization requires zero initialization of the 'B' 17 // subobject followed by a call to its constructor. 18 // PR5800 19 20 // CHECK: store i32 17 21 // CHECK: call void @llvm.memset.p0i8.i64 22 // CHECK: call void @_ZN1BC1Ev 23 C c = { 17 } ; 24 // CHECK: call void @_ZN1CD1Ev 25 } 26 27 enum enum_type { negative_number = -1, magic_number = 42 }; 28 29 class enum_holder 30 { 31 enum_type m_enum; 32 33 public: 34 enum_holder() : m_enum(magic_number) { } 35 }; 36 37 struct enum_holder_and_int 38 { 39 enum_holder e; 40 int i; 41 }; 42 43 // CHECK: _Z24test_enum_holder_and_intv() 44 void test_enum_holder_and_int() { 45 // CHECK: alloca 46 // CHECK-NEXT: bitcast 47 // CHECK-NEXT: call void @llvm.memset 48 // CHECK-NEXT: call void @_ZN19enum_holder_and_intC1Ev 49 enum_holder_and_int(); 50 // CHECK-NEXT: ret void 51 } 52 53 // PR7834: don't crash. 54 namespace test1 { 55 struct A { 56 int A::*f; 57 A(); 58 A(const A&); 59 A &operator=(const A &); 60 }; 61 62 struct B { 63 A base; 64 }; 65 66 void foo() { 67 B(); 68 } 69 } 70 71 namespace ptrmem { 72 struct S { 73 int mem1; 74 int S::*mem2; 75 }; 76 77 // CHECK-LABEL: define i32 @_ZN6ptrmem4testEPNS_1SE 78 int test(S *s) { 79 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64 80 // CHECK: getelementptr 81 // CHECK: ret 82 return s->*S().mem2; 83 } 84 } 85 86 namespace PR9801 { 87 88 struct Test { 89 Test() : i(10) {} 90 Test(int i) : i(i) {} 91 int i; 92 private: 93 int j; 94 }; 95 96 struct Test2 { 97 Test t; 98 }; 99 100 struct Test3 : public Test { }; 101 102 // CHECK-LABEL: define void @_ZN6PR98011fEv 103 void f() { 104 // CHECK-NOT: call void @llvm.memset.p0i8.i64 105 // CHECK: call void @_ZN6PR98014TestC1Ei 106 // CHECK-NOT: call void @llvm.memset.p0i8.i64 107 // CHECK: call void @_ZN6PR98014TestC1Ev 108 Test partial[3] = { 1 }; 109 110 // CHECK-NOT: call void @llvm.memset.p0i8.i64 111 // CHECK: call void @_ZN6PR98014TestC1Ev 112 // CHECK-NOT: call void @_ZN6PR98014TestC1Ev 113 Test empty[3] = {}; 114 115 // CHECK: call void @llvm.memset.p0i8.i64 116 // CHECK-NOT: call void @llvm.memset.p0i8.i64 117 // CHECK: call void @_ZN6PR98015Test2C1Ev 118 // CHECK-NOT: call void @_ZN6PR98015Test2C1Ev 119 Test2 empty2[3] = {}; 120 121 // CHECK: call void @llvm.memset.p0i8.i64 122 // CHECK-NOT: call void @llvm.memset.p0i8.i64 123 // CHECK: call void @_ZN6PR98015Test3C1Ev 124 // CHECK-NOT: call void @llvm.memset.p0i8.i64 125 // CHECK-NOT: call void @_ZN6PR98015Test3C1Ev 126 Test3 empty3[3] = {}; 127 } 128 129 } 130 131 namespace zeroinit { 132 struct S { int i; }; 133 134 // CHECK-LABEL: define i32 @_ZN8zeroinit4testEv() 135 int test() { 136 // CHECK: call void @llvm.memset.p0i8.i64 137 // CHECK: ret i32 0 138 return S().i; 139 } 140 141 struct X0 { 142 X0() { } 143 int x; 144 }; 145 146 struct X1 : X0 { 147 int x1; 148 void f(); 149 }; 150 151 // CHECK-LABEL: define void @_ZN8zeroinit9testX0_X1Ev 152 void testX0_X1() { 153 // CHECK: call void @llvm.memset.p0i8.i64 154 // CHECK-NEXT: call void @_ZN8zeroinit2X1C1Ev 155 // CHECK-NEXT: call void @_ZN8zeroinit2X11fEv 156 X1().f(); 157 } 158 159 template<typename> 160 struct X2 : X0 { 161 int x2; 162 void f(); 163 }; 164 165 template<typename> 166 struct X3 : X2<int> { 167 X3() : X2<int>() { } 168 int i; 169 }; 170 171 172 // CHECK-LABEL: define void @_ZN8zeroinit9testX0_X3Ev 173 void testX0_X3() { 174 // CHECK-NOT: call void @llvm.memset 175 // CHECK: call void @_ZN8zeroinit2X3IiEC1Ev 176 // CHECK: call void @_ZN8zeroinit2X2IiE1fEv 177 // CHECK-NEXT: ret void 178 X3<int>().f(); 179 } 180 181 // More checks at EOF 182 } 183 184 namespace PR8726 { 185 class C; 186 struct S { 187 const C &c1; 188 int i; 189 const C &c2; 190 }; 191 void f(const C& c) { 192 S s = {c, 42, c}; 193 } 194 195 } 196 197 // rdar://problem/9355931 198 namespace test6 { 199 struct A { A(); A(int); }; 200 201 void test() { 202 A arr[10][20] = { 5 }; 203 }; 204 // CHECK-LABEL: define void @_ZN5test64testEv() 205 // CHECK: [[ARR:%.*]] = alloca [10 x [20 x [[A:%.*]]]], 206 207 // CHECK-NEXT: [[INNER:%.*]] = getelementptr inbounds [10 x [20 x [[A]]]], [10 x [20 x [[A]]]]* [[ARR]], i64 0, i64 0 208 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [20 x [[A]]], [20 x [[A]]]* [[INNER]], i64 0, i64 0 209 // CHECK-NEXT: call void @_ZN5test61AC1Ei([[A]]* [[T0]], i32 5) 210 // CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [[A]], [[A]]* [[T0]], i64 1 211 // CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]], [[A]]* [[T0]], i64 20 212 // CHECK-NEXT: br label 213 // CHECK: [[CUR:%.*]] = phi [[A]]* [ [[BEGIN]], {{%.*}} ], [ [[NEXT:%.*]], {{%.*}} ] 214 // CHECK-NEXT: call void @_ZN5test61AC1Ev([[A]]* [[CUR]]) 215 // CHECK-NEXT: [[NEXT]] = getelementptr inbounds [[A]], [[A]]* [[CUR]], i64 1 216 // CHECK-NEXT: [[T0:%.*]] = icmp eq [[A]]* [[NEXT]], [[END]] 217 // CHECK-NEXT: br i1 218 219 // CHECK: [[BEGIN:%.*]] = getelementptr inbounds [20 x [[A]]], [20 x [[A]]]* [[INNER]], i64 1 220 // CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [20 x [[A]]], [20 x [[A]]]* [[INNER]], i64 10 221 // CHECK-NEXT: br label 222 // CHECK: [[CUR:%.*]] = phi [20 x [[A]]]* [ [[BEGIN]], {{%.*}} ], [ [[NEXT:%.*]], {{%.*}} ] 223 224 // Inner loop. 225 // CHECK-NEXT: [[IBEGIN:%.*]] = getelementptr inbounds [20 x [[A]]], [20 x [[A]]]* [[CUR]], i32 0, i32 0 226 // CHECK-NEXT: [[IEND:%.*]] = getelementptr inbounds [[A]], [[A]]* [[IBEGIN]], i64 20 227 // CHECK-NEXT: br label 228 // CHECK: [[ICUR:%.*]] = phi [[A]]* [ [[IBEGIN]], {{%.*}} ], [ [[INEXT:%.*]], {{%.*}} ] 229 // CHECK-NEXT: call void @_ZN5test61AC1Ev([[A]]* [[ICUR]]) 230 // CHECK-NEXT: [[INEXT:%.*]] = getelementptr inbounds [[A]], [[A]]* [[ICUR]], i64 1 231 // CHECK-NEXT: [[T0:%.*]] = icmp eq [[A]]* [[INEXT]], [[IEND]] 232 // CHECK-NEXT: br i1 [[T0]], 233 234 // CHECK: [[NEXT]] = getelementptr inbounds [20 x [[A]]], [20 x [[A]]]* [[CUR]], i64 1 235 // CHECK-NEXT: [[T0:%.*]] = icmp eq [20 x [[A]]]* [[NEXT]], [[END]] 236 // CHECK-NEXT: br i1 [[T0]] 237 // CHECK: ret void 238 } 239 240 namespace PR11124 { 241 // Make sure C::C doesn't overwrite parts of A while it is zero-initializing B 242 struct A { int a; A(); A(int); }; 243 struct B : virtual A { int b; }; 244 struct C : B { C(); }; 245 C::C() : A(3), B() {} 246 // CHECK-LABEL: define void @_ZN7PR111241CC1Ev 247 // CHECK: call void @llvm.memset.p0i8.i64(i8* {{.*}}, i8 0, i64 12, i32 8, i1 false) 248 // CHECK-NEXT: call void @_ZN7PR111241BC2Ev 249 // Make sure C::C doesn't overwrite parts of A while it is zero-initializing B 250 251 struct B2 : virtual A { int B::*b; }; 252 struct C2 : B2 { C2(); }; 253 C2::C2() : A(3), B2() {} 254 // CHECK-LABEL: define void @_ZN7PR111242C2C1Ev 255 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %{{.*}}, i8* {{.*}}, i64 16, i32 8, i1 false) 256 // CHECK-NEXT: call void @_ZN7PR111242B2C2Ev 257 } 258 259 // Ensure we produce an i1 here, and don't assert. 260 // CHECK-LABEL: define void @_Z9r170806_bv( 261 // CHECK: call void @_Z9r170806_ab(i1 zeroext false) 262 void r170806_a(bool b = bool()); 263 void r170806_b() { r170806_a(); } 264 265 namespace PR20256 { 266 struct data { int i; }; 267 268 template<typename T = int> 269 data g() { 270 data d; // not value-init 271 return d; 272 } 273 template data g(); 274 // CHECK-LABEL: define {{.*}} @_ZN7PR202561gIiEENS_4dataEv( 275 // CHECK-NOT: store 276 // CHECK-NOT: memset 277 // CHECK: } 278 279 template<typename ...T> 280 data h(T ...t) { 281 data d(t...); // value-init 282 return d; 283 } 284 template data h(); 285 // CHECK-LABEL: define {{.*}} @_ZN7PR202561hIJEEENS_4dataEDpT_( 286 // CHECK: call void @llvm.memset 287 // CHECK: } 288 289 290 template<typename T = int> 291 data j() { 292 data d = {}; // value-init 293 return d; 294 } 295 template data j(); 296 // CHECK-LABEL: define {{.*}} @_ZN7PR202561jIiEENS_4dataEv( 297 // CHECK: call void @llvm.memset 298 // CHECK: } 299 300 data f() { 301 data d; // not value-init 302 return d; 303 } 304 // CHECK-LABEL: define {{.*}} @_ZN7PR202561fEv( 305 // CHECK-NOT: store 306 // CHECK-NOT: memset 307 // CHECK: } 308 309 data i() { 310 data d = {}; // value-init 311 return d; 312 } 313 // CHECK-LABEL: define {{.*}} @_ZN7PR202561iEv( 314 // CHECK: call void @llvm.memset 315 // CHECK: } 316 } 317 318 // CHECK-LABEL: define linkonce_odr void @_ZN8zeroinit2X3IiEC2Ev(%"struct.zeroinit::X3"* %this) unnamed_addr 319 // CHECK: call void @llvm.memset.p0i8.i64 320 // CHECK-NEXT: call void @_ZN8zeroinit2X2IiEC2Ev 321 // CHECK-NEXT: ret void 322
