1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
| // RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -fexceptions %s -o - |FileCheck %s
// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm %s -o - |FileCheck -check-prefix CHECK-NOEXC %s
// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -mframe-pointer=non-leaf %s -o - \
// RUN: | FileCheck -check-prefix CHECK-FP %s
struct A {
A();
~A();
};
struct B { B(); ~B(); };
struct C { void *field; };
struct D { ~D(); };
// CHECK: @__dso_handle = external hidden global i8
// CHECK: @c = global %struct.C zeroinitializer, align 8
// PR6205: The casts should not require global initializers
// CHECK: @_ZN6PR59741cE = external global %"struct.PR5974::C"
// CHECK: @_ZN6PR59741aE = global %"struct.PR5974::A"* getelementptr inbounds (%"struct.PR5974::C", %"struct.PR5974::C"* @_ZN6PR59741cE, i32 0, i32 0)
// CHECK: @_ZN6PR59741bE = global %"struct.PR5974::B"* bitcast (i8* getelementptr (i8, i8* bitcast (%"struct.PR5974::C"* @_ZN6PR59741cE to i8*), i64 4) to %"struct.PR5974::B"*), align 8
// CHECK: call void @_ZN1AC1Ev(%struct.A* @a)
// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.A*)* @_ZN1AD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.A, %struct.A* @a, i32 0, i32 0), i8* @__dso_handle)
A a;
// CHECK: call void @_ZN1BC1Ev(%struct.B* @b)
// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.B*)* @_ZN1BD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.B, %struct.B* @b, i32 0, i32 0), i8* @__dso_handle)
B b;
// PR6205: this should not require a global initializer
// CHECK-NOT: call void @_ZN1CC1Ev(%struct.C* @c)
C c;
// CHECK: call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.D*)* @_ZN1DD1Ev to void (i8*)*), i8* getelementptr inbounds (%struct.D, %struct.D* @d, i32 0, i32 0), i8* @__dso_handle)
D d;
// <rdar://problem/7458115>
namespace test1 {
int f();
const int x = f(); // This has side-effects and gets emitted immediately.
const int y = x - 1; // This gets deferred.
const int z = ~y; // This also gets deferred, but gets "undeferred" before y.
int test() { return z; }
// CHECK-LABEL: define i32 @_ZN5test14testEv()
// All of these initializers end up delayed, so we check them later.
}
// <rdar://problem/8246444>
namespace test2 {
struct allocator { allocator(); ~allocator(); };
struct A { A(const allocator &a = allocator()); ~A(); };
A a;
// CHECK: call void @_ZN5test29allocatorC1Ev(
// CHECK: invoke void @_ZN5test21AC1ERKNS_9allocatorE(
// CHECK: call void @_ZN5test29allocatorD1Ev(
// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test21AD1Ev {{.*}} @_ZN5test21aE
}
namespace test3 {
// Tested at the beginning of the file.
const char * const var = "string";
extern const char * const var;
const char *test() { return var; }
}
namespace test4 {
struct A {
A();
};
extern int foo();
// This needs an initialization function and guard variables.
// CHECK: load i8, i8* bitcast (i64* @_ZGVN5test41xE
// CHECK: [[CALL:%.*]] = call i32 @_ZN5test43fooEv
// CHECK-NEXT: store i32 [[CALL]], i32* @_ZN5test41xE
// CHECK-NEXT: store i64 1, i64* @_ZGVN5test41xE
__attribute__((weak)) int x = foo();
}
namespace PR5974 {
struct A { int a; };
struct B { int b; };
struct C : A, B { int c; };
extern C c;
// These should not require global initializers.
A* a = &c;
B* b = &c;
}
// PR9570: the indirect field shouldn't crash IR gen.
namespace test5 {
static union {
unsigned bar[4096] __attribute__((aligned(128)));
};
}
namespace std { struct type_info; }
namespace test6 {
struct A { virtual ~A(); };
struct B : A {};
extern A *p;
// We must emit a dynamic initializer for 'q', because it could throw.
B *const q = &dynamic_cast<B&>(*p);
// CHECK: call void @__cxa_bad_cast()
// CHECK: store {{.*}} @_ZN5test6L1qE
// We don't need to emit 'r' at all, because it has internal linkage, is
// unused, and its initialization has no side-effects.
B *const r = dynamic_cast<B*>(p);
// CHECK-NOT: call void @__cxa_bad_cast()
// CHECK-NOT: store {{.*}} @_ZN5test6L1rE
// This can throw, so we need to emit it.
const std::type_info *const s = &typeid(*p);
// CHECK: store {{.*}} @_ZN5test6L1sE
// This can't throw, so we don't.
const std::type_info *const t = &typeid(p);
// CHECK-NOT: @_ZN5test6L1tE
extern B *volatile v;
// CHECK: store {{.*}} @_ZN5test6L1wE
B *const w = dynamic_cast<B*>(v);
// CHECK: load volatile
// CHECK: store {{.*}} @_ZN5test6L1xE
const int x = *(volatile int*)0x1234;
namespace {
int a = int();
volatile int b = int();
int c = a;
int d = b;
// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1aE
// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE
// CHECK-NOT: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1cE
// CHECK: load volatile {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1bE
// CHECK: store {{.*}} @_ZN5test6{{[A-Za-z0-9_]*}}1dE
}
}
namespace test7 {
struct A { A(); };
struct B { ~B(); int n; };
struct C { C() = default; C(const C&); int n; };
struct D {};
// CHECK: call void @_ZN5test71AC1Ev({{.*}}@_ZN5test7L1aE)
const A a = A();
// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZN5test7L2b1E
// CHECK: call i32 @__cxa_atexit({{.*}} @_ZN5test71BD1Ev{{.*}} @_ZGRN5test72b2E
// CHECK: call void @_ZN5test71BD1Ev(
// CHECK: store {{.*}} @_ZN5test7L2b3E
const B b1 = B();
const B &b2 = B();
const int b3 = B().n;
// CHECK-NOT: @_ZN5test7L2c1E
// CHECK: call void @llvm.memset{{.*}} @_ZN5test7L2c1E
// CHECK-NOT: @_ZN5test7L2c1E
// CHECK: @_ZN5test7L2c2E
// CHECK-NOT: @_ZN5test7L2c3E
// CHECK: @_ZN5test7L2c4E
const C c1 = C();
const C c2 = static_cast<const C&>(C());
const int c3 = C().n;
const int c4 = C(C()).n;
// CHECK-NOT: @_ZN5test7L1dE
const D d = D();
// CHECK: store {{.*}} @_ZN5test71eE
int f(), e = f();
}
// At the end of the file, we check that y is initialized before z.
// CHECK: define internal void [[TEST1_Z_INIT:@.*]]()
// CHECK: load i32, i32* @_ZN5test1L1yE
// CHECK-NEXT: xor
// CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1zE
// CHECK: define internal void [[TEST1_Y_INIT:@.*]]()
// CHECK: load i32, i32* @_ZN5test1L1xE
// CHECK-NEXT: sub
// CHECK-NEXT: store i32 {{.*}}, i32* @_ZN5test1L1yE
// CHECK: define internal void @_GLOBAL__sub_I_global_init.cpp() #{{[0-9]+}} section "__TEXT,__StaticInit,regular,pure_instructions" {
// CHECK: call void [[TEST1_Y_INIT]]
// CHECK: call void [[TEST1_Z_INIT]]
// rdar://problem/8090834: this should be nounwind
// CHECK-NOEXC: define internal void @_GLOBAL__sub_I_global_init.cpp() [[NUW:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" {
// CHECK-NOEXC: attributes [[NUW]] = { noinline nounwind{{.*}} }
// PR21811: attach the appropriate attribute to the global init function
// CHECK-FP: define internal void @_GLOBAL__sub_I_global_init.cpp() [[NUX:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" {
// CHECK-FP: attributes [[NUX]] = { noinline nounwind {{.*}}"frame-pointer"="non-leaf"{{.*}} }
|