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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -emit-llvm -o - | FileCheck %s --implicit-check-not=should_not_appear_in_output
struct Member { int x; Member(); Member(int); Member(const Member &); };
struct VBase { int x; VBase(); VBase(int); VBase(const VBase &); };
struct ValueClass {
ValueClass(int x, int y) : x(x), y(y) {}
int x;
int y;
}; // subject to ABI trickery
/* Test basic functionality. */
struct A {
A(struct Undeclared &);
A(ValueClass);
Member mem;
};
A::A(struct Undeclared &ref) : mem(0) {}
// Check that delegation works.
// CHECK-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
// CHECK: call void @_ZN6MemberC1Ei(
// CHECK-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
// CHECK: call void @_ZN1AC2ER10Undeclared(
A::A(ValueClass v) : mem(v.y - v.x) {}
// CHECK-LABEL: define void @_ZN1AC2E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr
// CHECK: call void @_ZN6MemberC1Ei(
// CHECK-LABEL: define void @_ZN1AC1E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr
// CHECK: call void @_ZN1AC2E10ValueClass(
/* Test that things work for inheritance. */
struct B : A {
B(struct Undeclared &);
Member mem;
};
B::B(struct Undeclared &ref) : A(ref), mem(1) {}
// CHECK-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
// CHECK: call void @_ZN1AC2ER10Undeclared(
// CHECK: call void @_ZN6MemberC1Ei(
// CHECK-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
// CHECK: call void @_ZN1BC2ER10Undeclared(
/* Test that the delegation optimization is disabled for classes with
virtual bases (for now). This is necessary because a vbase
initializer could access one of the parameter variables by
reference. That's a solvable problem, but let's not solve it right
now. */
struct C : virtual A {
C(int);
Member mem;
};
C::C(int x) : A(ValueClass(x, x+1)), mem(x * x) {}
// CHECK-LABEL: define void @_ZN1CC2Ei(%struct.C* %this, i8** %vtt, i32 %x) unnamed_addr
// CHECK: call void @_ZN6MemberC1Ei(
// CHECK-LABEL: define void @_ZN1CC1Ei(%struct.C* %this, i32 %x) unnamed_addr
// CHECK: call void @_ZN10ValueClassC1Eii(
// CHECK: call void @_ZN1AC2E10ValueClass(
// CHECK: call void @_ZN6MemberC1Ei(
/* Test that the delegation optimization is disabled for varargs
constructors. */
struct D : A {
D(int, ...);
Member mem;
};
D::D(int x, ...) : A(ValueClass(x, x+1)), mem(x*x) {}
// CHECK-LABEL: define void @_ZN1DC2Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr
// CHECK: call void @_ZN10ValueClassC1Eii(
// CHECK: call void @_ZN1AC2E10ValueClass(
// CHECK: call void @_ZN6MemberC1Ei(
// CHECK-LABEL: define void @_ZN1DC1Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr
// CHECK: call void @_ZN10ValueClassC1Eii(
// CHECK: call void @_ZN1AC2E10ValueClass(
// CHECK: call void @_ZN6MemberC1Ei(
// PR6622: this shouldn't crash
namespace test0 {
struct A {};
struct B : virtual A { int x; };
struct C : B {};
void test(C &in) {
C tmp = in;
}
}
namespace test1 {
struct A { A(); void *ptr; };
struct B { B(); int x; A a[0]; };
B::B() {}
// CHECK-LABEL: define void @_ZN5test11BC2Ev(
// CHECK: [[THIS:%.*]] = load [[B:%.*]]*, [[B:%.*]]**
// CHECK-NEXT: ret void
}
// Ensure that we
// a) emit the ABI-required but useless complete object and deleting destructor
// symbols for an abstract class, and
// b) do *not* emit references to virtual base destructors for an abstract class
//
// Our approach to this is to give these functions a body that simply traps.
//
// FIXME: We should ideally not create these symbols at all, but Clang can
// actually generate references to them in other TUs in some cases, so we can't
// stop emitting them without breaking ABI. See:
//
// https://github.com/itanium-cxx-abi/cxx-abi/issues/10
namespace abstract {
// Note, the destructor of this class is not instantiated here.
template<typename T> struct should_not_appear_in_output {
~should_not_appear_in_output() { int arr[-(int)sizeof(T)]; }
};
struct X { ~X(); };
struct A : virtual should_not_appear_in_output<int>, X {
virtual ~A() = 0;
};
// CHECK-LABEL: define void @_ZN8abstract1AD2Ev(
// CHECK: call {{.*}}@_ZN8abstract1XD2Ev(
// CHECK: ret
// CHECK-LABEL: define void @_ZN8abstract1AD1Ev(
// CHECK: call {{.*}}@llvm.trap(
// CHECK: unreachable
// CHECK-LABEL: define void @_ZN8abstract1AD0Ev(
// CHECK: call {{.*}}@llvm.trap(
// CHECK: unreachable
A::~A() {}
struct B : virtual should_not_appear_in_output<int>, X {
virtual void f() = 0;
~B();
};
// CHECK-LABEL: define void @_ZN8abstract1BD2Ev(
// CHECK: call {{.*}}@_ZN8abstract1XD2Ev(
// CHECK: ret
// CHECK-LABEL: define void @_ZN8abstract1BD1Ev(
// CHECK: call {{.*}}@llvm.trap(
// CHECK: unreachable
// CHECK-NOT: @_ZN8abstract1BD0Ev(
B::~B() {}
}
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