1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -emit-llvm -o - | FileCheck %s --implicit-check-not=should_not_appear_in_output --check-prefixes=CHECK,NULL-INVALID 2 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -emit-llvm -fno-delete-null-pointer-checks -o - | FileCheck %s --implicit-check-not=should_not_appear_in_output --check-prefixes=CHECK,NULL-VALID 3 4 struct Member { int x; Member(); Member(int); Member(const Member &); }; 5 struct VBase { int x; VBase(); VBase(int); VBase(const VBase &); }; 6 7 struct ValueClass { 8 ValueClass(int x, int y) : x(x), y(y) {} 9 int x; 10 int y; 11 }; // subject to ABI trickery 12 13 14 15 /* Test basic functionality. */ 16 struct A { 17 A(struct Undeclared &); 18 A(ValueClass); 19 Member mem; 20 }; 21 22 A::A(struct Undeclared &ref) : mem(0) {} 23 24 // Check that delegation works. 25 // NULL-INVALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull align 1 %ref) unnamed_addr 26 // NULL-VALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* align 1 %ref) unnamed_addr 27 // CHECK: call void @_ZN6MemberC1Ei( 28 29 // NULL-INVALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull align 1 %ref) unnamed_addr 30 // NULL-VALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* align 1 %ref) unnamed_addr 31 // CHECK: call void @_ZN1AC2ER10Undeclared( 32 33 A::A(ValueClass v) : mem(v.y - v.x) {} 34 35 // CHECK-LABEL: define void @_ZN1AC2E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr 36 // CHECK: call void @_ZN6MemberC1Ei( 37 38 // CHECK-LABEL: define void @_ZN1AC1E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr 39 // CHECK: call void @_ZN1AC2E10ValueClass( 40 41 /* Test that things work for inheritance. */ 42 struct B : A { 43 B(struct Undeclared &); 44 Member mem; 45 }; 46 47 B::B(struct Undeclared &ref) : A(ref), mem(1) {} 48 49 // NULL-INVALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull align 1 %ref) unnamed_addr 50 // NULL-VALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* align 1 %ref) unnamed_addr 51 // CHECK: call void @_ZN1AC2ER10Undeclared( 52 // CHECK: call void @_ZN6MemberC1Ei( 53 54 // NULL-INVALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull align 1 %ref) unnamed_addr 55 // NULL-VALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* align 1 %ref) unnamed_addr 56 // CHECK: call void @_ZN1BC2ER10Undeclared( 57 58 59 /* Test that the delegation optimization is disabled for classes with 60 virtual bases (for now). This is necessary because a vbase 61 initializer could access one of the parameter variables by 62 reference. That's a solvable problem, but let's not solve it right 63 now. */ 64 struct C : virtual A { 65 C(int); 66 Member mem; 67 }; 68 C::C(int x) : A(ValueClass(x, x+1)), mem(x * x) {} 69 70 // CHECK-LABEL: define void @_ZN1CC2Ei(%struct.C* %this, i8** %vtt, i32 %x) unnamed_addr 71 // CHECK: call void @_ZN6MemberC1Ei( 72 73 // CHECK-LABEL: define void @_ZN1CC1Ei(%struct.C* %this, i32 %x) unnamed_addr 74 // CHECK: call void @_ZN10ValueClassC1Eii( 75 // CHECK: call void @_ZN1AC2E10ValueClass( 76 // CHECK: call void @_ZN6MemberC1Ei( 77 78 79 /* Test that the delegation optimization is disabled for varargs 80 constructors. */ 81 struct D : A { 82 D(int, ...); 83 Member mem; 84 }; 85 86 D::D(int x, ...) : A(ValueClass(x, x+1)), mem(x*x) {} 87 88 // CHECK-LABEL: define void @_ZN1DC2Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr 89 // CHECK: call void @_ZN10ValueClassC1Eii( 90 // CHECK: call void @_ZN1AC2E10ValueClass( 91 // CHECK: call void @_ZN6MemberC1Ei( 92 93 // CHECK-LABEL: define void @_ZN1DC1Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr 94 // CHECK: call void @_ZN10ValueClassC1Eii( 95 // CHECK: call void @_ZN1AC2E10ValueClass( 96 // CHECK: call void @_ZN6MemberC1Ei( 97 98 // PR6622: this shouldn't crash 99 namespace test0 { 100 struct A {}; 101 struct B : virtual A { int x; }; 102 struct C : B {}; 103 104 void test(C &in) { 105 C tmp = in; 106 } 107 } 108 109 namespace test1 { 110 struct A { A(); void *ptr; }; 111 struct B { B(); int x; A a[0]; }; 112 B::B() {} 113 // CHECK-LABEL: define void @_ZN5test11BC2Ev( 114 // CHECK: [[THIS:%.*]] = load [[B:%.*]]*, [[B:%.*]]** 115 // CHECK-NEXT: ret void 116 } 117 118 // Ensure that we 119 // a) emit the ABI-required but useless complete object and deleting destructor 120 // symbols for an abstract class, and 121 // b) do *not* emit references to virtual base destructors for an abstract class 122 // 123 // Our approach to this is to give these functions a body that simply traps. 124 // 125 // FIXME: We should ideally not create these symbols at all, but Clang can 126 // actually generate references to them in other TUs in some cases, so we can't 127 // stop emitting them without breaking ABI. See: 128 // 129 // https://github.com/itanium-cxx-abi/cxx-abi/issues/10 130 namespace abstract { 131 // Note, the destructor of this class is not instantiated here. 132 template<typename T> struct should_not_appear_in_output { 133 ~should_not_appear_in_output() { int arr[-(int)sizeof(T)]; } 134 }; 135 136 struct X { ~X(); }; 137 138 struct A : virtual should_not_appear_in_output<int>, X { 139 virtual ~A() = 0; 140 }; 141 142 // CHECK-LABEL: define void @_ZN8abstract1AD2Ev( 143 // CHECK: call {{.*}}@_ZN8abstract1XD2Ev( 144 // CHECK: ret 145 146 // CHECK-LABEL: define void @_ZN8abstract1AD1Ev( 147 // CHECK: call {{.*}}@llvm.trap( 148 // CHECK: unreachable 149 150 // CHECK-LABEL: define void @_ZN8abstract1AD0Ev( 151 // CHECK: call {{.*}}@llvm.trap( 152 // CHECK: unreachable 153 A::~A() {} 154 155 struct B : virtual should_not_appear_in_output<int>, X { 156 virtual void f() = 0; 157 ~B(); 158 }; 159 160 // CHECK-LABEL: define void @_ZN8abstract1BD2Ev( 161 // CHECK: call {{.*}}@_ZN8abstract1XD2Ev( 162 // CHECK: ret 163 164 // CHECK-LABEL: define void @_ZN8abstract1BD1Ev( 165 // CHECK: call {{.*}}@llvm.trap( 166 // CHECK: unreachable 167 168 // CHECK-NOT: @_ZN8abstract1BD0Ev( 169 B::~B() {} 170 } 171