delete.cpp revision ca82a82082edc982a1fb5fcfef2dd2c8cf9bc824 
1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 %s -emit-llvm -o - | FileCheck %s
2
3void t1(int *a) {
4  delete a;
5}
6
7struct S {
8  int a;
9};
10
11// POD types.
12void t3(S *s) {
13  delete s;
14}
15
16// Non-POD
17struct T {
18  ~T();
19  int a;
20};
21
22// CHECK: define void @_Z2t4P1T
23void t4(T *t) {
24  // CHECK: call void @_ZN1TD1Ev
25  // CHECK-NEXT: bitcast
26  // CHECK-NEXT: call void @_ZdlPv
27  delete t;
28}
29
30// PR5102
31template <typename T>
32class A {
33  public: operator T *() const;
34};
35
36void f() {
37  A<char*> a;
38
39  delete a;
40}
41
42namespace test0 {
43  struct A {
44    void *operator new(__SIZE_TYPE__ sz);
45    void operator delete(void *p) { ::operator delete(p); }
46    ~A() {}
47  };
48
49  // CHECK: define void @_ZN5test04testEPNS_1AE(
50  void test(A *a) {
51    // CHECK: call void @_ZN5test01AD1Ev
52    // CHECK-NEXT: bitcast
53    // CHECK-NEXT: call void @_ZN5test01AdlEPv
54    delete a;
55  }
56
57  // CHECK: define linkonce_odr void @_ZN5test01AD1Ev(%"struct.test0::A"* %this) unnamed_addr
58  // CHECK: define linkonce_odr void @_ZN5test01AdlEPv
59}
60
61namespace test1 {
62  struct A {
63    int x;
64    ~A();
65  };
66
67  // CHECK: define void @_ZN5test14testEPA10_A20_NS_1AE(
68  void test(A (*arr)[10][20]) {
69    delete [] arr;
70    // CHECK:      icmp eq [10 x [20 x [[A:%.*]]]]* [[PTR:%.*]], null
71    // CHECK-NEXT: br i1
72
73    // CHECK:      [[BEGIN:%.*]] = getelementptr inbounds [10 x [20 x [[A]]]]* [[PTR]], i32 0, i32 0, i32 0
74    // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[BEGIN]] to i8*
75    // CHECK-NEXT: [[ALLOC:%.*]] = getelementptr inbounds i8* [[T0]], i64 -8
76    // CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[ALLOC]] to i64*
77    // CHECK-NEXT: [[COUNT:%.*]] = load i64* [[T1]]
78    // CHECK:      [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 [[COUNT]]
79    // CHECK-NEXT: [[ISEMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[END]]
80    // CHECK-NEXT: br i1 [[ISEMPTY]],
81    // CHECK:      [[PAST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
82    // CHECK-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[PAST]], i64 -1
83    // CHECK-NEXT: call void @_ZN5test11AD1Ev([[A]]* [[CUR]])
84    // CHECK-NEXT: [[ISDONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
85    // CHECK-NEXT: br i1 [[ISDONE]]
86    // CHECK:      call void @_ZdaPv(i8* [[ALLOC]])
87  }
88}
89
90namespace test2 {
91  // CHECK: define void @_ZN5test21fEPb
92  void f(bool *b) {
93    // CHECK: call void @_ZdlPv(i8*
94    delete b;
95    // CHECK: call void @_ZdaPv(i8*
96    delete [] b;
97  }
98}
99
100namespace test3 {
101  void f(int a[10][20]) {
102    // CHECK: call void @_ZdaPv(i8*
103    delete a;
104  }
105}
106
107namespace test4 {
108  // PR10341: ::delete with a virtual destructor
109  struct X {
110    virtual ~X();
111    void operator delete (void *);
112  };
113
114  // CHECK: define void @_ZN5test421global_delete_virtualEPNS_1XE
115  void global_delete_virtual(X *xp) {
116    // CHECK: [[VTABLE:%.*]] = load void ([[X:%.*]])***
117    // CHECK-NEXT: [[VFN:%.*]] = getelementptr inbounds void ([[X]])** [[VTABLE]], i64 0
118    // CHECK-NEXT: [[VFNPTR:%.*]] = load void ([[X]])** [[VFN]]
119    // CHECK-NEXT: call void [[VFNPTR]]([[X]] [[OBJ:%.*]])
120    // CHECK-NEXT: [[OBJVOID:%.*]] = bitcast [[X]] [[OBJ]] to i8*
121    // CHECK-NEXT: call void @_ZdlPv(i8* [[OBJVOID]]) nounwind
122    ::delete xp;
123  }
124}
125
126namespace test5 {
127  struct Incomplete;
128  // CHECK: define void @_ZN5test523array_delete_incompleteEPNS_10IncompleteES1_
129  void array_delete_incomplete(Incomplete *p1, Incomplete *p2) {
130    // CHECK: call void @_ZdlPv
131    delete p1;
132    // CHECK: call void @_ZdaPv
133    delete [] p2;
134  }
135}
136