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 | |