1 // RUN: %clang_cc1 -verify -triple x86_64-apple-darwin -emit-llvm -o - %s -std=c++11 | FileCheck %s 2 3 // FIXME: The padding in all these objects should be zero-initialized. 4 namespace StructUnion { 5 struct A { 6 int n; 7 double d; 8 union U { 9 constexpr U(int x) : x(x) {} 10 constexpr U(const char *y) : y(y) {} 11 int x; 12 const char *y; 13 } u; 14 15 constexpr A(int n, double d, int x) : n(n), d(d), u(x) {} 16 constexpr A(int n, double d, const char *y) : n(n), d(d), u(y) {} 17 }; 18 19 // CHECK: @_ZN11StructUnion1aE = constant {{.*}} { i32 1, double 2.000000e+00, {{.*}} { i32 3, [4 x i8] undef } } 20 extern constexpr A a(1, 2.0, 3); 21 22 // CHECK: @_ZN11StructUnion1bE = constant {{.*}} { i32 4, double 5.000000e+00, {{.*}} { i8* getelementptr inbounds ([6 x i8]* @{{.*}}, i32 0, i32 0) } } 23 extern constexpr A b(4, 5, "hello"); 24 25 struct B { 26 int n; 27 }; 28 29 // CHECK: @_ZN11StructUnion1cE = global {{.*}} zeroinitializer 30 // CHECK: @_ZN11StructUnion2c2E = global {{.*}} zeroinitializer 31 B c; 32 B c2 = B(); 33 34 // CHECK: @_ZN11StructUnion1dE = global {{.*}} zeroinitializer 35 B d[10]; 36 37 struct C { 38 constexpr C() : c(0) {} 39 int c; 40 }; 41 42 // CHECK: @_ZN11StructUnion1eE = global {{.*}} zeroinitializer 43 C e[10]; 44 45 struct D { 46 constexpr D() : d(5) {} 47 int d; 48 }; 49 50 // CHECK: @_ZN11StructUnion1fE = global {{.*}} { i32 5 } 51 D f; 52 53 union E { 54 int a; 55 void *b = &f; 56 }; 57 58 // CHECK: @_ZN11StructUnion1gE = global {{.*}} @_ZN11StructUnion1fE 59 E g; 60 61 // CHECK: @_ZN11StructUnion1hE = global {{.*}} @_ZN11StructUnion1fE 62 E h = E(); 63 } 64 65 namespace BaseClass { 66 template<typename T, unsigned> struct X : T {}; 67 struct C { char c = 1; }; 68 template<unsigned... Ns> struct Cs : X<C,Ns>... {}; 69 struct N { int n = 3; }; 70 struct D { double d = 4.0; }; 71 72 template<typename ...Ts> 73 struct Test : Ts... { constexpr Test() : Ts()..., n(5) {} int n; }; 74 75 using Test1 = Test<N, C, Cs<1,2>, D, X<C,1>>; 76 // CHECK: @_ZN9BaseClass2t1E = constant {{.*}} { i32 3, i8 1, i8 1, i8 1, double 4.000000e+00, i8 1, i32 5 }, align 8 77 extern constexpr Test1 t1 = Test1(); 78 79 struct DN : D, N {}; 80 struct DND : DN, X<D,0> {}; 81 struct DNN : DN, X<N,0> {}; 82 // CHECK: @_ZN9BaseClass3dndE = constant {{.*}} { double 4.000000e+00, i32 3, double 4.000000e+00 } 83 extern constexpr DND dnd = DND(); 84 // Note, N subobject is laid out in DN subobject's tail padding. 85 // CHECK: @_ZN9BaseClass3dnnE = constant {{.*}} { double 4.000000e+00, i32 3, i32 3 } 86 extern constexpr DNN dnn = DNN(); 87 88 struct E {}; 89 struct Test2 : X<E,0>, X<E,1>, X<E,2>, X<E,3> {}; 90 // CHECK: @_ZN9BaseClass2t2E = constant {{.*}} undef 91 extern constexpr Test2 t2 = Test2(); 92 93 struct __attribute((packed)) PackedD { double y = 2; }; 94 struct Test3 : C, PackedD { constexpr Test3() {} }; 95 // CHECK: @_ZN9BaseClass2t3E = constant <{ i8, double }> <{ i8 1, double 2.000000e+00 }> 96 extern constexpr Test3 t3 = Test3(); 97 } 98 99 namespace Array { 100 // CHECK: @_ZN5Array3arrE = constant [2 x i32] [i32 4, i32 0] 101 extern constexpr int arr[2] = { 4 }; 102 103 // CHECK: @_ZN5Array1cE = constant [6 x [4 x i8]] [{{.*}} c"foo\00", [4 x i8] c"a\00\00\00", [4 x i8] c"bar\00", [4 x i8] c"xyz\00", [4 x i8] c"b\00\00\00", [4 x i8] c"123\00"] 104 extern constexpr char c[6][4] = { "foo", "a", { "bar" }, { 'x', 'y', 'z' }, { "b" }, '1', '2', '3' }; 105 106 // CHECK: @_ZN5Array2ucE = constant [4 x i8] c"foo\00" 107 extern constexpr unsigned char uc[] = { "foo" }; 108 109 struct C { constexpr C() : n(5) {} int n, m = 3 * n + 1; }; 110 // CHECK: @_ZN5Array5ctorsE = constant [3 x {{.*}}] [{{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }] 111 extern const C ctors[3]; 112 constexpr C ctors[3]; 113 114 // CHECK: @_ZN5Array1dE = constant {{.*}} { [2 x i32] [i32 1, i32 2], [3 x i32] [i32 3, i32 4, i32 5] } 115 struct D { int n[2]; int m[3]; } extern constexpr d = { 1, 2, 3, 4, 5 }; 116 117 struct E { 118 char c[4]; 119 char d[4]; 120 constexpr E() : c("foo"), d("x") {} 121 }; 122 // CHECK: @_ZN5Array1eE = constant {{.*}} { [4 x i8] c"foo\00", [4 x i8] c"x\00\00\00" } 123 extern constexpr E e = E(); 124 125 // PR13290 126 struct F { constexpr F() : n(4) {} int n; }; 127 // CHECK: @_ZN5Array2f1E = global {{.*}} zeroinitializer 128 F f1[1][1][0] = { }; 129 // CHECK: @_ZN5Array2f2E = global {{.* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4}} 130 F f2[2][2][2] = { }; 131 } 132 133 namespace MemberPtr { 134 struct B1 { 135 int a, b; 136 virtual void f(); 137 void g(); 138 }; 139 struct B2 { 140 int c, d; 141 virtual void h(); 142 void i(); 143 }; 144 struct C : B1 { 145 int e; 146 virtual void j(); 147 void k(); 148 }; 149 struct D : C, B2 { 150 int z; 151 virtual void l(); 152 void m(); 153 }; 154 155 // CHECK: @_ZN9MemberPtr2daE = constant i64 8 156 // CHECK: @_ZN9MemberPtr2dbE = constant i64 12 157 // CHECK: @_ZN9MemberPtr2dcE = constant i64 32 158 // CHECK: @_ZN9MemberPtr2ddE = constant i64 36 159 // CHECK: @_ZN9MemberPtr2deE = constant i64 16 160 // CHECK: @_ZN9MemberPtr2dzE = constant i64 40 161 extern constexpr int (D::*da) = &B1::a; 162 extern constexpr int (D::*db) = &C::b; 163 extern constexpr int (D::*dc) = &B2::c; 164 extern constexpr int (D::*dd) = &D::d; 165 extern constexpr int (D::*de) = &C::e; 166 extern constexpr int (D::*dz) = &D::z; 167 168 // CHECK: @_ZN9MemberPtr2baE = constant i64 8 169 // CHECK: @_ZN9MemberPtr2bbE = constant i64 12 170 // CHECK: @_ZN9MemberPtr2bcE = constant i64 8 171 // CHECK: @_ZN9MemberPtr2bdE = constant i64 12 172 // CHECK: @_ZN9MemberPtr2beE = constant i64 16 173 // CHECK: @_ZN9MemberPtr3b1zE = constant i64 40 174 // CHECK: @_ZN9MemberPtr3b2zE = constant i64 16 175 extern constexpr int (B1::*ba) = (int(B1::*))&B1::a; 176 extern constexpr int (B1::*bb) = (int(B1::*))&C::b; 177 extern constexpr int (B2::*bc) = (int(B2::*))&B2::c; 178 extern constexpr int (B2::*bd) = (int(B2::*))&D::d; 179 extern constexpr int (B1::*be) = (int(B1::*))&C::e; 180 extern constexpr int (B1::*b1z) = (int(B1::*))&D::z; 181 extern constexpr int (B2::*b2z) = (int(B2::*))&D::z; 182 183 // CHECK: @_ZN9MemberPtr2dfE = constant {{.*}} { i64 1, i64 0 } 184 // CHECK: @_ZN9MemberPtr2dgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 } 185 // CHECK: @_ZN9MemberPtr2dhE = constant {{.*}} { i64 1, i64 24 } 186 // CHECK: @_ZN9MemberPtr2diE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 24 } 187 // CHECK: @_ZN9MemberPtr2djE = constant {{.*}} { i64 9, i64 0 } 188 // CHECK: @_ZN9MemberPtr2dkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 } 189 // CHECK: @_ZN9MemberPtr2dlE = constant {{.*}} { i64 17, i64 0 } 190 // CHECK: @_ZN9MemberPtr2dmE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 } 191 extern constexpr void (D::*df)() = &C::f; 192 extern constexpr void (D::*dg)() = &B1::g; 193 extern constexpr void (D::*dh)() = &B2::h; 194 extern constexpr void (D::*di)() = &D::i; 195 extern constexpr void (D::*dj)() = &C::j; 196 extern constexpr void (D::*dk)() = &C::k; 197 extern constexpr void (D::*dl)() = &D::l; 198 extern constexpr void (D::*dm)() = &D::m; 199 200 // CHECK: @_ZN9MemberPtr2bfE = constant {{.*}} { i64 1, i64 0 } 201 // CHECK: @_ZN9MemberPtr2bgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 } 202 // CHECK: @_ZN9MemberPtr2bhE = constant {{.*}} { i64 1, i64 0 } 203 // CHECK: @_ZN9MemberPtr2biE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 0 } 204 // CHECK: @_ZN9MemberPtr2bjE = constant {{.*}} { i64 9, i64 0 } 205 // CHECK: @_ZN9MemberPtr2bkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 } 206 // CHECK: @_ZN9MemberPtr3b1lE = constant {{.*}} { i64 17, i64 0 } 207 // CHECK: @_ZN9MemberPtr3b1mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 } 208 // CHECK: @_ZN9MemberPtr3b2lE = constant {{.*}} { i64 17, i64 -24 } 209 // CHECK: @_ZN9MemberPtr3b2mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 -24 } 210 extern constexpr void (B1::*bf)() = (void(B1::*)())&C::f; 211 extern constexpr void (B1::*bg)() = (void(B1::*)())&B1::g; 212 extern constexpr void (B2::*bh)() = (void(B2::*)())&B2::h; 213 extern constexpr void (B2::*bi)() = (void(B2::*)())&D::i; 214 extern constexpr void (B1::*bj)() = (void(B1::*)())&C::j; 215 extern constexpr void (B1::*bk)() = (void(B1::*)())&C::k; 216 extern constexpr void (B1::*b1l)() = (void(B1::*)())&D::l; 217 extern constexpr void (B1::*b1m)() = (void(B1::*)())&D::m; 218 extern constexpr void (B2::*b2l)() = (void(B2::*)())&D::l; 219 extern constexpr void (B2::*b2m)() = (void(B2::*)())&D::m; 220 } 221 222 namespace LiteralReference { 223 struct Lit { 224 constexpr Lit() : n(5) {} 225 int n; 226 }; 227 // FIXME: This should have static initialization, but we do not implement 228 // that yet. For now, just check that we don't set the (pointer) value of 229 // the reference to 5! 230 // 231 // CHECK: @_ZN16LiteralReference3litE = global {{.*}} null 232 const Lit &lit = Lit(); 233 } 234 235 namespace NonLiteralConstexpr { 236 constexpr int factorial(int n) { 237 return n ? factorial(n-1) * n : 1; 238 } 239 extern void f(int *p); 240 241 struct NonTrivialDtor { 242 constexpr NonTrivialDtor() : n(factorial(5)), p(&n) {} 243 ~NonTrivialDtor() { 244 f(p); 245 } 246 247 int n; 248 int *p; 249 }; 250 static_assert(!__is_literal(NonTrivialDtor), ""); 251 // CHECK: @_ZN19NonLiteralConstexpr3ntdE = global {{.*}} { i32 120, i32* getelementptr 252 NonTrivialDtor ntd; 253 254 struct VolatileMember { 255 constexpr VolatileMember() : n(5) {} 256 volatile int n; 257 }; 258 static_assert(!__is_literal(VolatileMember), ""); 259 // CHECK: @_ZN19NonLiteralConstexpr2vmE = global {{.*}} { i32 5 } 260 VolatileMember vm; 261 262 struct Both { 263 constexpr Both() : n(10) {} 264 ~Both(); 265 volatile int n; 266 }; 267 // CHECK: @_ZN19NonLiteralConstexpr1bE = global {{.*}} { i32 10 } 268 Both b; 269 270 void StaticVars() { 271 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE3ntd = {{.*}} { i32 120, i32* getelementptr {{.*}} 272 // CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE3ntd = 273 static NonTrivialDtor ntd; 274 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE2vm = {{.*}} { i32 5 } 275 // CHECK-NOT: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE2vm = 276 static VolatileMember vm; 277 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE1b = {{.*}} { i32 10 } 278 // CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE1b = 279 static Both b; 280 } 281 } 282 283 // PR12067 284 namespace VirtualMembers { 285 struct A { 286 constexpr A(double d) : d(d) {} 287 virtual void f(); 288 double d; 289 }; 290 struct B : A { 291 constexpr B() : A(2.0), c{'h', 'e', 'l', 'l', 'o'} {} 292 constexpr B(int n) : A(n), c{'w', 'o', 'r', 'l', 'd'} {} 293 virtual void g(); 294 char c[5]; 295 }; 296 struct C { 297 constexpr C() : n(64) {} 298 int n; 299 }; 300 struct D : C, A, B { 301 constexpr D() : A(1.0), B(), s(5) {} 302 short s; 303 }; 304 struct E : D, B { 305 constexpr E() : B(3), c{'b','y','e'} {} 306 char c[3]; 307 }; 308 309 // CHECK: @_ZN14VirtualMembers1eE = global { i8**, double, i32, i8**, double, [5 x i8], i16, i8**, double, [5 x i8], [3 x i8] } { i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 2), double 1.000000e+00, i32 64, i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 5), double 2.000000e+00, [5 x i8] c"hello", i16 5, i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 9), double 3.000000e+00, [5 x i8] c"world", [3 x i8] c"bye" } 310 E e; 311 312 struct nsMemoryImpl { 313 virtual void f(); 314 }; 315 // CHECK: @_ZN14VirtualMembersL13sGlobalMemoryE = internal global { i8** } { i8** getelementptr inbounds ([3 x i8*]* @_ZTVN14VirtualMembers12nsMemoryImplE, i64 0, i64 2) } 316 static nsMemoryImpl sGlobalMemory; 317 } 318 319 namespace PR13273 { 320 struct U { 321 int t; 322 U() = default; 323 }; 324 325 struct S : U { 326 S() = default; 327 }; 328 329 // CHECK: @_ZN7PR132731sE = {{.*}} zeroinitializer 330 extern const S s {}; 331 } 332 333 // Constant initialization tests go before this point, 334 // dynamic initialization tests go after. 335 336 // We must emit a constant initializer for NonLiteralConstexpr::ntd, but also 337 // emit an initializer to register its destructor. 338 // CHECK: define {{.*}}cxx_global_var_init{{.*}} 339 // CHECK-NOT: NonLiteralConstexpr 340 // CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev {{.*}} @_ZN19NonLiteralConstexpr3ntdE 341 // CHECK-NEXT: ret void 342 343 // We don't need to emit any dynamic initialization for NonLiteralConstexpr::vm. 344 // CHECK-NOT: NonLiteralConstexpr2vm 345 346 // We must emit a constant initializer for NonLiteralConstexpr::b, but also 347 // emit an initializer to register its destructor. 348 // CHECK: define {{.*}}cxx_global_var_init{{.*}} 349 // CHECK-NOT: NonLiteralConstexpr 350 // CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr4BothD1Ev {{.*}} @_ZN19NonLiteralConstexpr1bE 351 // CHECK-NEXT: ret void 352 353 // CHECK: define {{.*}}NonLiteralConstexpr10StaticVars 354 // CHECK-NOT: } 355 // CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev 356 // CHECK-NOT: } 357 // CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr4BothD1Ev 358 359 namespace CrossFuncLabelDiff { 360 // Make sure we refuse to constant-fold the variable b. 361 constexpr long a(bool x) { return x ? 0 : (long)&&lbl + (0 && ({lbl: 0;})); } 362 void test() { static long b = (long)&&lbl - a(false); lbl: return; } 363 // CHECK: sub nsw i64 ptrtoint (i8* blockaddress(@_ZN18CrossFuncLabelDiff4testEv, {{.*}}) to i64), 364 // CHECK: store i64 {{.*}}, i64* @_ZZN18CrossFuncLabelDiff4testEvE1b, align 8 365 } 366 367 // PR12012 368 namespace VirtualBase { 369 struct B {}; 370 struct D : virtual B {}; 371 D d; 372 // CHECK: call {{.*}}@_ZN11VirtualBase1DC1Ev 373 374 template<typename T> struct X : T { 375 constexpr X() : T() {} 376 }; 377 X<D> x; 378 // CHECK: call {{.*}}@_ZN11VirtualBase1XINS_1DEEC1Ev 379 } 380 381 // PR12145 382 namespace Unreferenced { 383 int n; 384 constexpr int *p = &n; 385 // We must not emit a load of 'p' here, since it's not odr-used. 386 int q = *p; 387 // CHECK-NOT: _ZN12Unreferenced1pE 388 // CHECK: = load i32* @_ZN12Unreferenced1nE 389 // CHECK-NEXT: store i32 {{.*}}, i32* @_ZN12Unreferenced1qE 390 // CHECK-NOT: _ZN12Unreferenced1pE 391 392 // Technically, we are not required to substitute variables of reference types 393 // initialized by constant expressions, because the special case for odr-use 394 // of variables in [basic.def.odr]p2 only applies to objects. But we do so 395 // anyway. 396 397 constexpr int &r = n; 398 // CHECK-NOT: _ZN12Unreferenced1rE 399 int s = r; 400 401 const int t = 1; 402 const int &rt = t; 403 int f(int); 404 int u = f(rt); 405 // CHECK: call i32 @_ZN12Unreferenced1fEi(i32 1) 406 } 407 408 namespace InitFromConst { 409 template<typename T> void consume(T); 410 411 const bool b = true; 412 const int n = 5; 413 constexpr double d = 4.3; 414 415 struct S { int n = 7; S *p = 0; }; 416 constexpr S s = S(); 417 const S &r = s; 418 constexpr const S *p = &r; 419 constexpr int S::*mp = &S::n; 420 constexpr int a[3] = { 1, 4, 9 }; 421 422 void test() { 423 // CHECK: call void @_ZN13InitFromConst7consumeIbEEvT_(i1 zeroext true) 424 consume(b); 425 426 // CHECK: call void @_ZN13InitFromConst7consumeIiEEvT_(i32 5) 427 consume(n); 428 429 // CHECK: call void @_ZN13InitFromConst7consumeIdEEvT_(double 4.300000e+00) 430 consume(d); 431 432 // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE) 433 consume<const S&>(s); 434 435 // FIXME CHECK-NOT: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE) 436 // There's no lvalue-to-rvalue conversion here, so 'r' is odr-used, and 437 // we're permitted to emit a load of it. This seems likely to be a defect 438 // in the standard. If we start emitting a direct reference to 's', update 439 // this test. 440 consume<const S&>(r); 441 442 // CHECK: call void @_ZN13InitFromConst7consumeIPKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE) 443 consume(p); 444 445 // CHECK: call void @_ZN13InitFromConst7consumeIMNS_1SEiEEvT_(i64 0) 446 consume(mp); 447 448 // CHECK: call void @_ZN13InitFromConst7consumeIPKiEEvT_(i32* getelementptr inbounds ([3 x i32]* @_ZN13InitFromConstL1aE, i32 0, i32 0)) 449 consume(a); 450 } 451 } 452 453 namespace Null { 454 decltype(nullptr) null(); 455 // CHECK: call {{.*}} @_ZN4Null4nullEv( 456 int *p = null(); 457 struct S {}; 458 // CHECK: call {{.*}} @_ZN4Null4nullEv( 459 int S::*q = null(); 460 } 461
