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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-globals all --version 5
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=gnu11 -verify -emit-llvm %s -o - | FileCheck %s
// expected-no-diagnostics
union U1 {
int x;
char y[16];
};
struct S1 {
int x;
union U1 y;
};
union U2 {
int x;
char y[16];
} __attribute__((__aligned__(32)));
struct S2 {
int x;
long long y;
char z[8];
} __attribute__((__aligned__(32)));
struct S3 {
char x;
unsigned char y : 4;
unsigned char z : 7;
} __attribute__((packed));
union U1 global_u1 = {};
union U1 global_u2 = {3};
union U1 global_u2_from_cast = (union U1)3;
struct S1 global_s1 = {};
struct S1 global_s2 = {
.x = 3,
};
struct S1 global_s3 = {.x = 3, .y = {.x = 6}};
const union U1 global_const_u1 = {4};
struct S1 global_s3_from_const_u1 = {.y = global_const_u1};
union U2 global_u3 = {};
struct S2 global_s4 = {};
struct S2 global_s5 = {.x = 1};
struct S3 global_s6 = {101, 15, 123};
// Test empty initializer for union.
//.
// CHECK: @global_u1 = global %union.U1 zeroinitializer, align 4
// CHECK: @global_u2 = global %union.U1 { i32 3, [12 x i8] zeroinitializer }, align 4
// CHECK: @global_u2_from_cast = global { i32, [12 x i8] } { i32 3, [12 x i8] zeroinitializer }, align 4
// CHECK: @global_s1 = global %struct.S1 zeroinitializer, align 4
// CHECK: @global_s2 = global %struct.S1 { i32 3, %union.U1 zeroinitializer }, align 4
// CHECK: @global_s3 = global %struct.S1 { i32 3, %union.U1 { i32 6, [12 x i8] zeroinitializer } }, align 4
// CHECK: @global_const_u1 = constant %union.U1 { i32 4, [12 x i8] zeroinitializer }, align 4
// CHECK: @global_s3_from_const_u1 = global %struct.S1 { i32 0, %union.U1 { i32 4, [12 x i8] zeroinitializer } }, align 4
// CHECK: @global_u3 = global %union.U2 zeroinitializer, align 32
// CHECK: @global_s4 = global { i32, [4 x i8], i64, [8 x i8], [8 x i8] } zeroinitializer, align 32
// CHECK: @global_s5 = global { i32, [4 x i8], i64, [8 x i8], [8 x i8] } { i32 1, [4 x i8] zeroinitializer, i64 0, [8 x i8] zeroinitializer, [8 x i8] zeroinitializer }, align 32
// CHECK: @global_s6 = global { i8, i8, i8 } { i8 101, i8 -65, i8 7 }, align 1
// CHECK: @test2.a = internal global %union.U1 zeroinitializer, align 4
// CHECK: @__const.test3.a = private unnamed_addr constant %union.U1 { i32 3, [12 x i8] zeroinitializer }, align 4
// CHECK: @test4.a = internal global %union.U1 { i32 3, [12 x i8] zeroinitializer }, align 4
// CHECK: @test6.s = internal global %struct.S1 zeroinitializer, align 4
// CHECK: @__const.test7.s = private unnamed_addr constant %struct.S1 { i32 3, %union.U1 zeroinitializer }, align 4
// CHECK: @test8.s = internal global %struct.S1 { i32 3, %union.U1 zeroinitializer }, align 4
// CHECK: @__const.test9.s = private unnamed_addr constant %struct.S1 { i32 3, %union.U1 { i32 6, [12 x i8] zeroinitializer } }, align 4
// CHECK: @test10.s = internal global %struct.S1 { i32 3, %union.U1 { i32 6, [12 x i8] zeroinitializer } }, align 4
// CHECK: @test12.a = internal global %union.U2 zeroinitializer, align 32
// CHECK: @test14.s = internal global { i32, [4 x i8], i64, [8 x i8], [8 x i8] } zeroinitializer, align 32
// CHECK: @__const.test15.s = private unnamed_addr constant { i32, [4 x i8], i64, [8 x i8], [8 x i8] } { i32 1, [4 x i8] zeroinitializer, i64 0, [8 x i8] zeroinitializer, [8 x i8] zeroinitializer }, align 32
// CHECK: @test16.s = internal global { i32, [4 x i8], i64, [8 x i8], [8 x i8] } { i32 1, [4 x i8] zeroinitializer, i64 0, [8 x i8] zeroinitializer, [8 x i8] zeroinitializer }, align 32
//.
// CHECK-LABEL: define dso_local void @test1(
// CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[A:%.*]] = alloca [[UNION_U1:%.*]], align 4
// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[A]], i8 0, i64 16, i1 false)
// CHECK-NEXT: ret void
//
void test1() {
union U1 a = {};
}
// Test empty initializer for union. Use static variable.
// CHECK-LABEL: define dso_local void @test2(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test2() {
static union U1 a = {};
}
// Test only initializing a small field for union.
// CHECK-LABEL: define dso_local void @test3(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[A:%.*]] = alloca [[UNION_U1:%.*]], align 4
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[A]], ptr align 4 @__const.test3.a, i64 16, i1 false)
// CHECK-NEXT: ret void
//
void test3() {
union U1 a = {3};
}
// Test only initializing a small field for union. Use static variable.
// CHECK-LABEL: define dso_local void @test4(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test4() {
static union U1 a = {3};
}
// Test union in struct. Use empty initializer for the struct.
// CHECK-LABEL: define dso_local void @test5(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S1:%.*]], align 4
// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[S]], i8 0, i64 20, i1 false)
// CHECK-NEXT: ret void
//
void test5() {
struct S1 s = {};
}
// Test union in struct. Use empty initializer for the struct. Use static variable.
// CHECK-LABEL: define dso_local void @test6(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test6() {
static struct S1 s = {};
}
// Test union in struct. Initialize other fields of the struct.
// CHECK-LABEL: define dso_local void @test7(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S1:%.*]], align 4
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[S]], ptr align 4 @__const.test7.s, i64 20, i1 false)
// CHECK-NEXT: ret void
//
void test7() {
struct S1 s = {
.x = 3,
};
}
// Test union in struct. Initialize other fields of the struct. Use static variable.
// CHECK-LABEL: define dso_local void @test8(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test8() {
static struct S1 s = {
.x = 3,
};
}
// Test union in struct. Initialize a small field for union.
// CHECK-LABEL: define dso_local void @test9(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S1:%.*]], align 4
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[S]], ptr align 4 @__const.test9.s, i64 20, i1 false)
// CHECK-NEXT: ret void
//
void test9() {
struct S1 s = {.x = 3,
.y = {
.x = 6,
}};
}
// Test union in struct. Initialize a small field for union. Use static variable.
// CHECK-LABEL: define dso_local void @test10(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test10() {
static struct S1 s = {.x = 3,
.y = {
.x = 6,
}};
}
// Test empty initializer for union with padding.
// CHECK-LABEL: define dso_local void @test11(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[A:%.*]] = alloca [[UNION_U2:%.*]], align 32
// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 32 [[A]], i8 0, i64 32, i1 false)
// CHECK-NEXT: ret void
//
void test11() {
union U2 a = {};
}
// Test empty initializer for union with padding. Use static variable.
// CHECK-LABEL: define dso_local void @test12(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test12() {
static union U2 a = {};
}
// Test empty initializer for struct with padding.
// CHECK-LABEL: define dso_local void @test13(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S2:%.*]], align 32
// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 32 [[S]], i8 0, i64 32, i1 false)
// CHECK-NEXT: ret void
//
void test13() {
struct S2 s = {};
}
// Test empty initializer for struct with padding. Use static variable.
// CHECK-LABEL: define dso_local void @test14(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test14() {
static struct S2 s = {};
}
// Test partial initialization for struct with padding.
// CHECK-LABEL: define dso_local void @test15(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S2:%.*]], align 32
// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 32 [[S]], ptr align 32 @__const.test15.s, i64 32, i1 false)
// CHECK-NEXT: ret void
//
void test15() {
struct S2 s = {.x = 1};
}
// Test partial initialization for struct with padding. Use static variable.
// CHECK-LABEL: define dso_local void @test16(
// CHECK-SAME: ) #[[ATTR0]] {
// CHECK-NEXT: [[ENTRY:.*:]]
// CHECK-NEXT: ret void
//
void test16() {
static struct S2 s = {.x = 1};
}
//.
// CHECK: attributes #[[ATTR0]] = { noinline nounwind optnone "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
// CHECK: attributes #[[ATTR1:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: write) }
// CHECK: attributes #[[ATTR2:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
//.
// CHECK: [[META0:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
// CHECK: [[META1:![0-9]+]] = !{!"{{.*}}clang version {{.*}}"}
//.
|
