| 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 %ref) unnamed_addr |
| 26 | // NULL-VALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* %ref) unnamed_addr |
| 27 | // CHECK: call void @_ZN6MemberC1Ei( |
| 28 | |
| 29 | // NULL-INVALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull %ref) unnamed_addr |
| 30 | // NULL-VALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* %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 %ref) unnamed_addr |
| 50 | // NULL-VALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* %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 %ref) unnamed_addr |
| 55 | // NULL-VALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* %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 | |