// RUN: %clang_cc1 -w -fmerge-all-constants -triple x86_64-elf-gnu -emit-llvm -o - %s -std=c++11 | FileCheck %s
// RUN: %clang_cc1 -w -fmerge-all-constants -triple x86_64-elf-gnu -emit-llvm -o - %s -std=c++20 | FileCheck -check-prefix=CHECK20 %s
// FIXME: The padding in all these objects should be zero-initialized.
namespace StructUnion {
struct A {
int n;
double d;
union U {
constexpr U(int x) : x(x) {}
constexpr U(const char *y) : y(y) {}
int x;
const char *y;
} u;
constexpr A(int n, double d, int x) : n(n), d(d), u(x) {}
constexpr A(int n, double d, const char *y) : n(n), d(d), u(y) {}
};
// CHECK: @_ZN11StructUnion1aE ={{.*}} constant {{.*}} { i32 1, double 2.000000e+00, {{.*}} { i32 3, [4 x i8] undef } }
extern constexpr A a(1, 2.0, 3);
// CHECK: @_ZN11StructUnion1bE ={{.*}} constant {{.*}} { i32 4, double 5.000000e+00, {{.*}} { ptr @{{.*}} } }
extern constexpr A b(4, 5, "hello");
struct B {
int n;
};
// CHECK: @_ZN11StructUnion1cE ={{.*}} global {{.*}} zeroinitializer
// CHECK: @_ZN11StructUnion2c2E ={{.*}} global {{.*}} zeroinitializer
B c;
B c2 = B();
// CHECK: @_ZN11StructUnion1dE ={{.*}} global {{.*}} zeroinitializer
B d[10];
struct C {
constexpr C() : c(0) {}
int c;
};
// CHECK: @_ZN11StructUnion1eE ={{.*}} global {{.*}} zeroinitializer
C e[10];
struct D {
constexpr D() : d(5) {}
int d;
};
// CHECK: @_ZN11StructUnion1fE ={{.*}} global {{.*}} { i32 5 }
D f;
union E {
int a;
void *b = &f;
};
// CHECK: @_ZN11StructUnion1gE ={{.*}} global {{.*}} @_ZN11StructUnion1fE
E g;
// CHECK: @_ZN11StructUnion1hE ={{.*}} global {{.*}} @_ZN11StructUnion1fE
E h = E();
}
namespace BaseClass {
template<typename T, unsigned> struct X : T {};
struct C { char c = 1; };
template<unsigned... Ns> struct Cs : X<C,Ns>... {};
struct N { int n = 3; };
struct D { double d = 4.0; };
template<typename ...Ts>
struct Test : Ts... { constexpr Test() : Ts()..., n(5) {} int n; };
using Test1 = Test<N, C, Cs<1,2>, D, X<C,1>>;
// CHECK: @_ZN9BaseClass2t1E ={{.*}} constant {{.*}} { i32 3, i8 1, i8 1, i8 1, double 4.000000e+00, i8 1, i32 5 }, align 8
extern constexpr Test1 t1 = Test1();
struct DN : D, N {};
struct DND : DN, X<D,0> {};
struct DNN : DN, X<N,0> {};
// CHECK: @_ZN9BaseClass3dndE ={{.*}} constant {{.*}} { double 4.000000e+00, i32 3, double 4.000000e+00 }
extern constexpr DND dnd = DND();
// Note, N subobject is laid out in DN subobject's tail padding.
// CHECK: @_ZN9BaseClass3dnnE ={{.*}} constant {{.*}} { double 4.000000e+00, i32 3, i32 3 }
extern constexpr DNN dnn = DNN();
struct E {};
struct Test2 : X<E,0>, X<E,1>, X<E,2>, X<E,3> {};
// CHECK: @_ZN9BaseClass2t2E ={{.*}} constant {{.*}} zeroinitializer, align 1
extern constexpr Test2 t2 = Test2();
struct __attribute((packed)) PackedD { double y = 2; };
struct Test3 : C, PackedD { constexpr Test3() {} };
// CHECK: @_ZN9BaseClass2t3E ={{.*}} constant <{ i8, double }> <{ i8 1, double 2.000000e+00 }>
extern constexpr Test3 t3 = Test3();
}
namespace Array {
// CHECK: @_ZN5Array3arrE ={{.*}} constant [2 x i32] [i32 4, i32 0]
extern constexpr int arr[2] = { 4 };
// 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"]
extern constexpr char c[6][4] = { "foo", "a", { "bar" }, { 'x', 'y', 'z' }, { "b" }, '1', '2', '3' };
// CHECK: @_ZN5Array2ucE ={{.*}} constant [4 x i8] c"foo\00"
extern constexpr unsigned char uc[] = { "foo" };
struct C { constexpr C() : n(5) {} int n, m = 3 * n + 1; };
// CHECK: @_ZN5Array5ctorsE ={{.*}} constant [3 x {{.*}}] [{{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }]
extern const C ctors[3];
constexpr C ctors[3];
// CHECK: @_ZN5Array1dE ={{.*}} constant {{.*}} { [2 x i32] [i32 1, i32 2], [3 x i32] [i32 3, i32 4, i32 5] }
struct D { int n[2]; int m[3]; } extern constexpr d = { 1, 2, 3, 4, 5 };
struct E {
char c[4];
char d[4];
constexpr E() : c("foo"), d("x") {}
};
// CHECK: @_ZN5Array1eE ={{.*}} constant {{.*}} { [4 x i8] c"foo\00", [4 x i8] c"x\00\00\00" }
extern constexpr E e = E();
// PR13290
struct F { constexpr F() : n(4) {} int n; };
// CHECK: @_ZN5Array2f1E ={{.*}} global {{.*}} zeroinitializer
F f1[1][1][0] = { };
// CHECK: @_ZN5Array2f2E ={{.*}} global {{.* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4}}
F f2[2][2][2] = { };
}
namespace MemberPtr {
struct B1 {
int a, b;
virtual void f();
void g();
};
struct B2 {
int c, d;
virtual void h();
void i();
};
struct C : B1 {
int e;
virtual void j();
void k();
};
struct D : C, B2 {
int z;
virtual void l();
void m();
};
// CHECK: @_ZN9MemberPtr2daE ={{.*}} constant i64 8
// CHECK: @_ZN9MemberPtr2dbE ={{.*}} constant i64 12
// CHECK: @_ZN9MemberPtr2dcE ={{.*}} constant i64 32
// CHECK: @_ZN9MemberPtr2ddE ={{.*}} constant i64 36
// CHECK: @_ZN9MemberPtr2deE ={{.*}} constant i64 16
// CHECK: @_ZN9MemberPtr2dzE ={{.*}} constant i64 40
extern constexpr int (D::*da) = &B1::a;
extern constexpr int (D::*db) = &C::b;
extern constexpr int (D::*dc) = &B2::c;
extern constexpr int (D::*dd) = &D::d;
extern constexpr int (D::*de) = &C::e;
extern constexpr int (D::*dz) = &D::z;
// CHECK: @_ZN9MemberPtr2baE ={{.*}} constant i64 8
// CHECK: @_ZN9MemberPtr2bbE ={{.*}} constant i64 12
// CHECK: @_ZN9MemberPtr2bcE ={{.*}} constant i64 8
// CHECK: @_ZN9MemberPtr2bdE ={{.*}} constant i64 12
// CHECK: @_ZN9MemberPtr2beE ={{.*}} constant i64 16
// CHECK: @_ZN9MemberPtr3b1zE ={{.*}} constant i64 40
// CHECK: @_ZN9MemberPtr3b2zE ={{.*}} constant i64 16
extern constexpr int (B1::*ba) = (int(B1::*))&B1::a;
extern constexpr int (B1::*bb) = (int(B1::*))&C::b;
extern constexpr int (B2::*bc) = (int(B2::*))&B2::c;
extern constexpr int (B2::*bd) = (int(B2::*))&D::d;
extern constexpr int (B1::*be) = (int(B1::*))&C::e;
extern constexpr int (B1::*b1z) = (int(B1::*))&D::z;
extern constexpr int (B2::*b2z) = (int(B2::*))&D::z;
// CHECK: @_ZN9MemberPtr2dfE ={{.*}} constant {{.*}} { i64 1, i64 0 }
// CHECK: @_ZN9MemberPtr2dgE ={{.*}} constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr2dhE ={{.*}} constant {{.*}} { i64 1, i64 24 }
// CHECK: @_ZN9MemberPtr2diE ={{.*}} constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 24 }
// CHECK: @_ZN9MemberPtr2djE ={{.*}} constant {{.*}} { i64 9, i64 0 }
// CHECK: @_ZN9MemberPtr2dkE ={{.*}} constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr2dlE ={{.*}} constant {{.*}} { i64 17, i64 0 }
// CHECK: @_ZN9MemberPtr2dmE ={{.*}} constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 }
extern constexpr void (D::*df)() = &C::f;
extern constexpr void (D::*dg)() = &B1::g;
extern constexpr void (D::*dh)() = &B2::h;
extern constexpr void (D::*di)() = &D::i;
extern constexpr void (D::*dj)() = &C::j;
extern constexpr void (D::*dk)() = &C::k;
extern constexpr void (D::*dl)() = &D::l;
extern constexpr void (D::*dm)() = &D::m;
// CHECK: @_ZN9MemberPtr2bfE ={{.*}} constant {{.*}} { i64 1, i64 0 }
// CHECK: @_ZN9MemberPtr2bgE ={{.*}} constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr2bhE ={{.*}} constant {{.*}} { i64 1, i64 0 }
// CHECK: @_ZN9MemberPtr2biE ={{.*}} constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr2bjE ={{.*}} constant {{.*}} { i64 9, i64 0 }
// CHECK: @_ZN9MemberPtr2bkE ={{.*}} constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr3b1lE ={{.*}} constant {{.*}} { i64 17, i64 0 }
// CHECK: @_ZN9MemberPtr3b1mE ={{.*}} constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 }
// CHECK: @_ZN9MemberPtr3b2lE ={{.*}} constant {{.*}} { i64 17, i64 -24 }
// CHECK: @_ZN9MemberPtr3b2mE ={{.*}} constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 -24 }
extern constexpr void (B1::*bf)() = (void(B1::*)())&C::f;
extern constexpr void (B1::*bg)() = (void(B1::*)())&B1::g;
extern constexpr void (B2::*bh)() = (void(B2::*)())&B2::h;
extern constexpr void (B2::*bi)() = (void(B2::*)())&D::i;
extern constexpr void (B1::*bj)() = (void(B1::*)())&C::j;
extern constexpr void (B1::*bk)() = (void(B1::*)())&C::k;
extern constexpr void (B1::*b1l)() = (void(B1::*)())&D::l;
extern constexpr void (B1::*b1m)() = (void(B1::*)())&D::m;
extern constexpr void (B2::*b2l)() = (void(B2::*)())&D::l;
extern constexpr void (B2::*b2m)() = (void(B2::*)())&D::m;
}
namespace LiteralReference {
struct Lit {
constexpr Lit() : n(5) {}
int n;
};
// This creates a non-const temporary and binds a reference to it.
// CHECK: @[[TEMP:.*]] = internal global {{.*}} { i32 5 }, align 4
// CHECK: @_ZN16LiteralReference3litE ={{.*}} constant {{.*}} @[[TEMP]], align 8
const Lit &lit = Lit();
// This creates a const temporary as part of the reference initialization.
// CHECK: @[[TEMP:.*]] = internal constant {{.*}} { i32 5 }, align 4
// CHECK: @_ZN16LiteralReference4lit2E ={{.*}} constant {{.*}} @[[TEMP]], align 8
const Lit &lit2 = {};
struct A { int &&r1; const int &&r2; };
struct B { A &&a1; const A &&a2; };
B b = { { 0, 1 }, { 2, 3 } };
// CHECK: @[[TEMP0:.*]] = internal global i32 0, align 4
// CHECK: @[[TEMP1:.*]] = internal constant i32 1, align 4
// CHECK: @[[TEMPA1:.*]] = internal global {{.*}} { ptr @[[TEMP0]], ptr @[[TEMP1]] }, align 8
// CHECK: @[[TEMP2:.*]] = internal global i32 2, align 4
// CHECK: @[[TEMP3:.*]] = internal constant i32 3, align 4
// CHECK: @[[TEMPA2:.*]] = internal constant {{.*}} { ptr @[[TEMP2]], ptr @[[TEMP3]] }, align 8
// CHECK: @_ZN16LiteralReference1bE ={{.*}} global {{.*}} { ptr @[[TEMPA1]], ptr @[[TEMPA2]] }, align 8
struct Subobj {
int a, b, c;
};
// CHECK: @[[TEMP:.*]] = internal global {{.*}} { i32 1, i32 2, i32 3 }, align 4
// CHECK: @_ZN16LiteralReference2soE ={{.*}} constant ptr getelementptr (i8, ptr @[[TEMP]], i64 4)
constexpr int &&so = Subobj{ 1, 2, 3 }.b;
struct Dummy { int padding; };
struct Derived : Dummy, Subobj {
constexpr Derived() : Dummy{200}, Subobj{4, 5, 6} {}
};
using ConstDerived = const Derived;
// CHECK: @[[TEMPCOMMA:.*]] = internal constant {{.*}} { i32 200, i32 4, i32 5, i32 6 }
// CHECK: @_ZN16LiteralReference5commaE ={{.*}} constant {{.*}} getelementptr {{.*}} @[[TEMPCOMMA]]{{.*}}, i64 8)
constexpr const int &comma = (1, (2, ConstDerived{}).b);
// CHECK: @[[TEMPDERIVED:.*]] = internal global {{.*}} { i32 200, i32 4, i32 5, i32 6 }
// CHECK: @_ZN16LiteralReference4baseE ={{.*}} constant {{.*}} getelementptr {{.*}} @[[TEMPDERIVED]]{{.*}}, i64 4)
constexpr Subobj &&base = Derived{};
// CHECK: @_ZN16LiteralReference7derivedE ={{.*}} constant {{.*}} @[[TEMPDERIVED]]
constexpr Derived &derived = static_cast<Derived&>(base);
}
namespace NonLiteralConstexpr {
constexpr int factorial(int n) {
return n ? factorial(n-1) * n : 1;
}
extern void f(int *p);
struct NonTrivialDtor {
constexpr NonTrivialDtor() : n(factorial(5)), p(&n) {}
~NonTrivialDtor() {
f(p);
}
int n;
int *p;
};
static_assert(!__is_literal(NonTrivialDtor), "");
// CHECK: @_ZN19NonLiteralConstexpr3ntdE ={{.*}} global {{.*}} { i32 120, ptr @
NonTrivialDtor ntd;
struct VolatileMember {
constexpr VolatileMember() : n(5) {}
volatile int n;
};
static_assert(!__is_literal(VolatileMember), "");
// CHECK: @_ZN19NonLiteralConstexpr2vmE ={{.*}} global {{.*}} { i32 5 }
VolatileMember vm;
struct Both {
constexpr Both() : n(10) {}
~Both();
volatile int n;
};
// CHECK: @_ZN19NonLiteralConstexpr1bE ={{.*}} global {{.*}} { i32 10 }
Both b;
void StaticVars() {
// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE3ntd = {{.*}} { i32 120, ptr @
// CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE3ntd =
static NonTrivialDtor ntd;
// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE2vm = {{.*}} { i32 5 }
// CHECK-NOT: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE2vm =
static VolatileMember vm;
// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE1b = {{.*}} { i32 10 }
// CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE1b =
static Both b;
}
}
// PR12067
namespace VirtualMembers {
struct A {
constexpr A(double d) : d(d) {}
virtual void f();
double d;
};
struct B : A {
constexpr B() : A(2.0), c{'h', 'e', 'l', 'l', 'o'} {}
constexpr B(int n) : A(n), c{'w', 'o', 'r', 'l', 'd'} {}
virtual void g();
char c[5];
};
struct C {
constexpr C() : n(64) {}
int n;
};
struct D : C, A, B {
constexpr D() : A(1.0), B(), s(5) {}
short s;
};
struct E : D, B {
constexpr E() : B(3), c{'b','y','e'} {}
char c[3];
};
// CHECK: @_ZN14VirtualMembers1eE ={{.*}} global { ptr, double, i32, ptr, double, [5 x i8], i16, ptr, double, [5 x i8], [3 x i8] } { ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr], [4 x ptr], [4 x ptr] }, ptr @_ZTVN14VirtualMembers1EE, i32 0, i32 0, i32 2), double 1.000000e+00, i32 64, ptr getelementptr inbounds inrange(-16, 16) ({ [3 x ptr], [4 x ptr], [4 x ptr] }, ptr @_ZTVN14VirtualMembers1EE, i32 0, i32 1, i32 2), double 2.000000e+00, [5 x i8] c"hello", i16 5, ptr getelementptr inbounds inrange(-16, 16) ({ [3 x ptr], [4 x ptr], [4 x ptr] }, ptr @_ZTVN14VirtualMembers1EE, i32 0, i32 2, i32 2), double 3.000000e+00, [5 x i8] c"world", [3 x i8] c"bye" }
E e;
struct nsMemoryImpl {
virtual void f();
};
// CHECK: @_ZN14VirtualMembersL13sGlobalMemoryE = internal global %"struct.VirtualMembers::nsMemoryImpl" { ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr] }, ptr @_ZTVN14VirtualMembers12nsMemoryImplE, i32 0, i32 0, i32 2) }
__attribute__((used))
static nsMemoryImpl sGlobalMemory;
template<class T>
struct TemplateClass {
constexpr TemplateClass() : t{42} {}
virtual void templateMethod() {}
T t;
};
// CHECK: @_ZN14VirtualMembers1tE ={{.*}} global { ptr, i32 } { ptr getelementptr inbounds inrange(-16, 8) ({ [3 x ptr] }, ptr @_ZTVN14VirtualMembers13TemplateClassIiEE, i32 0, i32 0, i32 2), i32 42 }
TemplateClass<int> t;
}
namespace PR13273 {
struct U {
int t;
U() = default;
};
struct S : U {
S() = default;
};
// CHECK: @_ZN7PR132731sE = {{.*}} zeroinitializer
extern const S s {};
}
namespace ArrayTemporary {
struct A { const int (&x)[3]; };
struct B { const A (&x)[2]; };
// CHECK: @[[A1:_ZGRN14ArrayTemporary1bE.*]] = internal constant [3 x i32] [i32 1, i32 2, i32 3]
// CHECK: @[[A2:_ZGRN14ArrayTemporary1bE.*]] = internal constant [3 x i32] [i32 4, i32 5, i32 6]
// CHECK: @[[ARR:_ZGRN14ArrayTemporary1bE.*]] = internal constant [2 x {{.*}}] [{{.*}} { ptr @[[A1]] }, {{.*}} { ptr @[[A2]] }]
// CHECK: @[[B:_ZGRN14ArrayTemporary1bE.*]] = internal global {{.*}} { ptr @[[ARR]] }
// CHECK: @_ZN14ArrayTemporary1bE ={{.*}} constant ptr @[[B]]
B &&b = { { { { 1, 2, 3 } }, { { 4, 5, 6 } } } };
}
namespace UnemittedTemporaryDecl {
constexpr int &&ref = 0;
extern constexpr int &ref2 = ref;
// CHECK: @_ZGRN22UnemittedTemporaryDecl3refE_ = internal global i32 0
// FIXME: This declaration should not be emitted -- it isn't odr-used.
// CHECK: @_ZN22UnemittedTemporaryDecl3refE
// CHECK: @_ZN22UnemittedTemporaryDecl4ref2E ={{.*}} constant ptr @_ZGRN22UnemittedTemporaryDecl3refE_
}
namespace DR2126 {
struct A { int &&b; };
constexpr const A &a = {42};
// CHECK: @_ZGRN6DR21261aE0_ = internal global i32 42
// FIXME: This is unused and need not be emitted.
// CHECK: @_ZGRN6DR21261aE_ = internal constant {{.*}} { ptr @_ZGRN6DR21261aE0_ }
// CHECK: @_ZN6DR21261rE ={{.*}} constant ptr @_ZGRN6DR21261aE0_
int &r = a.b;
// Dynamically initialized: the temporary object bound to 'b' could be
// modified (eg, by placement 'new') before the initializer of 's' runs.
constexpr A &&b = {42};
// CHECK: @_ZN6DR21261sE ={{.*}} global ptr null
int &s = b.b;
}
// CHECK: @_ZZN12LocalVarInit3aggEvE1a = internal constant {{.*}} i32 101
// CHECK: @_ZZN12LocalVarInit4ctorEvE1a = internal constant {{.*}} i32 102
// CHECK: @__const._ZN12LocalVarInit8mutable_Ev.a = private unnamed_addr constant {{.*}} i32 103
// CHECK: @_ZGRN33ClassTemplateWithStaticDataMember1SIvE1aE_ = linkonce_odr constant i32 5, comdat
// CHECK: @_ZN33ClassTemplateWithStaticDataMember3useE ={{.*}} constant ptr @_ZGRN33ClassTemplateWithStaticDataMember1SIvE1aE_
// CHECK: @_ZGRN39ClassTemplateWithHiddenStaticDataMember1SIvE1aE_ = linkonce_odr hidden constant i32 5, comdat
// CHECK: @_ZN39ClassTemplateWithHiddenStaticDataMember3useE ={{.*}} constant ptr @_ZGRN39ClassTemplateWithHiddenStaticDataMember1SIvE1aE_
// CHECK: @.str.[[STR:[0-9]+]] ={{.*}} constant [9 x i8] c"12345678\00"
// CHECK-NEXT: @e = global %struct.PR69979 { ptr @.str.[[STR]] }
// CHECK: @_ZGRZN20InlineStaticConstRef3funEvE1i_ = linkonce_odr constant i32 10, comdat
// CHECK20: @_ZZN12LocalVarInit4dtorEvE1a = internal constant {{.*}} i32 103
// Constant initialization tests go before this point,
// dynamic initialization tests go after.
// We must emit a constant initializer for NonLiteralConstexpr::ntd, but also
// emit an initializer to register its destructor.
// CHECK: define {{.*}}cxx_global_var_init{{.*}}
// CHECK-NOT: NonLiteralConstexpr
// CHECK: call {{.*}}cxa_atexit(ptr @_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev, ptr @_ZN19NonLiteralConstexpr3ntdE
// CHECK-NEXT: ret void
// We don't need to emit any dynamic initialization for NonLiteralConstexpr::vm.
// CHECK-NOT: NonLiteralConstexpr2vm
// We must emit a constant initializer for NonLiteralConstexpr::b, but also
// emit an initializer to register its destructor.
// CHECK: define {{.*}}cxx_global_var_init{{.*}}
// CHECK-NOT: NonLiteralConstexpr
// CHECK: call {{.*}}cxa_atexit(ptr @_ZN19NonLiteralConstexpr4BothD1Ev, ptr @_ZN19NonLiteralConstexpr1bE
// CHECK-NEXT: ret void
// CHECK: define {{.*}}NonLiteralConstexpr10StaticVars
// CHECK-NOT: }
// CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev
// CHECK-NOT: }
// CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr4BothD1Ev
// PR12848: Don't emit dynamic initializers for local constexpr variables.
namespace LocalVarInit {
constexpr int f(int n) { return n; }
struct Agg { int k; };
struct Ctor { constexpr Ctor(int n) : k(n) {} int k; };
struct Mutable { constexpr Mutable(int n) : k(n) {} mutable int k; };
// CHECK: define {{.*}} @_ZN12LocalVarInit6scalarEv
// CHECK-NOT: call
// CHECK: store i32 100,
// CHECK-NOT: call
// CHECK: ret i32 100
int scalar() { constexpr int a = { f(100) }; return a; }
// CHECK: define {{.*}} @_ZN12LocalVarInit3aggEv
// CHECK-NOT: call
// CHECK: ret i32 101
int agg() { constexpr Agg a = { f(101) }; return a.k; }
// CHECK: define {{.*}} @_ZN12LocalVarInit4ctorEv
// CHECK-NOT: call
// CHECK: ret i32 102
int ctor() { constexpr Ctor a = { f(102) }; return a.k; }
// CHECK: define {{.*}} @_ZN12LocalVarInit8mutable_Ev
// CHECK-NOT: call
// CHECK: call {{.*}}memcpy{{.*}} @__const._ZN12LocalVarInit8mutable_Ev.a
// CHECK-NOT: call
// Can't fold return value due to 'mutable'.
// CHECK-NOT: ret i32 103
// CHECK: }
int mutable_() { constexpr Mutable a = { f(103) }; return a.k; }
#if __cplusplus >= 202002L
// CHECK20: define {{.*}} @_ZN12LocalVarInit4dtorEv
// CHECK20-NOT: call
// CHECK20: ret i32 103
struct Dtor { constexpr Dtor(int n) : k(n) {} constexpr ~Dtor() {} int k; };
int dtor() { constexpr Dtor a = { f(103) }; return a.k; }
#endif
}
namespace CrossFuncLabelDiff {
// Make sure we refuse to constant-fold the variable b.
constexpr long a(bool x) { return x ? 0 : (long)&&lbl + (0 && ({lbl: 0;})); }
void test() { static long b = (long)&&lbl - a(false); lbl: return; }
// CHECK: sub nsw i64 ptrtoint (ptr blockaddress(@_ZN18CrossFuncLabelDiff4testEv, {{.*}}) to i64),
// CHECK: store i64 {{.*}}, ptr @_ZZN18CrossFuncLabelDiff4testEvE1b, align 8
}
// PR12012
namespace VirtualBase {
struct B {};
struct D : virtual B {};
D d;
// CHECK: call {{.*}}@_ZN11VirtualBase1DC1Ev
template<typename T> struct X : T {
constexpr X() : T() {}
};
X<D> x;
// CHECK: call {{.*}}@_ZN11VirtualBase1XINS_1DEEC1Ev
}
// PR12145
namespace Unreferenced {
int n;
constexpr int *p = &n;
// We must not emit a load of 'p' here, since it's not odr-used.
int q = *p;
// CHECK-NOT: _ZN12Unreferenced1pE
// CHECK: = load i32, ptr @_ZN12Unreferenced1nE
// CHECK-NEXT: store i32 {{.*}}, ptr @_ZN12Unreferenced1qE
// CHECK-NOT: _ZN12Unreferenced1pE
// Technically, we are not required to substitute variables of reference types
// initialized by constant expressions, because the special case for odr-use
// of variables in [basic.def.odr]p2 only applies to objects. But we do so
// anyway.
constexpr int &r = n;
// CHECK-NOT: _ZN12Unreferenced1rE
int s = r;
const int t = 1;
const int &rt = t;
int f(int);
int u = f(rt);
// CHECK: call noundef i32 @_ZN12Unreferenced1fEi(i32 noundef 1)
}
namespace InitFromConst {
template<typename T> void consume(T);
const bool b = true;
const int n = 5;
constexpr double d = 4.3;
struct S { int n = 7; S *p = 0; };
constexpr S s = S();
const S &r = s;
constexpr const S *p = &r;
constexpr int S::*mp = &S::n;
constexpr int a[3] = { 1, 4, 9 };
void test() {
// CHECK: call void @_ZN13InitFromConst7consumeIbEEvT_(i1 noundef zeroext true)
consume(b);
// CHECK: call void @_ZN13InitFromConst7consumeIiEEvT_(i32 noundef 5)
consume(n);
// CHECK: call void @_ZN13InitFromConst7consumeIdEEvT_(double noundef 4.300000e+00)
consume(d);
// CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE)
consume<const S&>(s);
// CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE)
consume<const S&>(r);
// CHECK: call void @_ZN13InitFromConst7consumeIPKNS_1SEEEvT_(ptr noundef @_ZN13InitFromConstL1sE)
consume(p);
// CHECK: call void @_ZN13InitFromConst7consumeIMNS_1SEiEEvT_(i64 0)
consume(mp);
// CHECK: call void @_ZN13InitFromConst7consumeIPKiEEvT_(ptr noundef @_ZN13InitFromConstL1aE)
consume(a);
}
}
namespace Null {
decltype(nullptr) null();
// CHECK: call {{.*}} @_ZN4Null4nullEv(
int *p = null();
struct S {};
// CHECK: call {{.*}} @_ZN4Null4nullEv(
int S::*q = null();
}
namespace InlineStaticConstRef {
inline const int &fun() {
static const int &i = 10;
return i;
// CHECK: ret ptr @_ZGRZN20InlineStaticConstRef3funEvE1i_
}
const int &use = fun();
}
namespace ClassTemplateWithStaticDataMember {
template <typename T>
struct S {
static const int &a;
};
template <typename T>
const int &S<T>::a = 5;
const int &use = S<void>::a;
}
namespace ClassTemplateWithHiddenStaticDataMember {
template <typename T>
struct S {
__attribute__((visibility("hidden"))) static const int &a;
};
template <typename T>
const int &S<T>::a = 5;
const int &use = S<void>::a;
}
namespace ClassWithStaticConstexprDataMember {
struct X {
static constexpr const char &p = 'c';
};
// CHECK: @_ZGRN34ClassWithStaticConstexprDataMember1X1pE_
const char *f() { return &X::p; }
}
struct PR69979 {
const char (&d)[9];
} e {"12345678"};
// VirtualMembers::TemplateClass::templateMethod() must be defined in this TU,
// not just declared.
// CHECK: define linkonce_odr void @_ZN14VirtualMembers13TemplateClassIiE14templateMethodEv(ptr {{[^,]*}} %this)
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