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
| // REQUIRES: arm-registered-target
// RUN: %clang_cc1 -triple arm-none-none-eabi \
// RUN: -O2 \
// RUN: -target-cpu cortex-a8 \
// RUN: -emit-llvm -o - %s | FileCheck %s
extern "C" {
// Base case, nothing interesting.
struct S {
int x, y;
};
void f0(int, S);
void f0m(int, int, int, int, int, S);
void g0() {
S s = {6, 7};
f0(1, s);
f0m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g0
// CHECK: call void @f0(i32 1, [2 x i32] [i32 6, i32 7]
// CHECK: call void @f0m(i32 1, i32 2, i32 3, i32 4, i32 5, [2 x i32] [i32 6, i32 7]
// CHECK: declare void @f0(i32, [2 x i32])
// CHECK: declare void @f0m(i32, i32, i32, i32, i32, [2 x i32])
// Aligned struct, passed according to its natural alignment.
struct __attribute__((aligned(8))) S8 {
int x, y;
} s8;
void f1(int, S8);
void f1m(int, int, int, int, int, S8);
void g1() {
S8 s = {6, 7};
f1(1, s);
f1m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g1
// CHECK: call void @f1(i32 1, [2 x i32] [i32 6, i32 7]
// CHECK: call void @f1m(i32 1, i32 2, i32 3, i32 4, i32 5, [2 x i32] [i32 6, i32 7]
// CHECK: declare void @f1(i32, [2 x i32])
// CHECK: declare void @f1m(i32, i32, i32, i32, i32, [2 x i32])
// Aligned struct, passed according to its natural alignment.
struct alignas(16) S16 {
int x, y;
};
extern "C" void f2(int, S16);
extern "C" void f2m(int, int, int, int, int, S16);
void g2() {
S16 s = {6, 7};
f2(1, s);
f2m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g2
// CHECK: call void @f2(i32 1, [4 x i32] [i32 6, i32 7
// CHECK: call void @f2m(i32 1, i32 2, i32 3, i32 4, i32 5, [4 x i32] [i32 6, i32 7
// CHECK: declare void @f2(i32, [4 x i32])
// CHECK: declare void @f2m(i32, i32, i32, i32, i32, [4 x i32])
// Increased natural alignment.
struct SF8 {
int x __attribute__((aligned(8)));
int y;
};
void f3(int, SF8);
void f3m(int, int, int, int, int, SF8);
void g3() {
SF8 s = {6, 7};
f3(1, s);
f3m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g3
// CHECK: call void @f3(i32 1, [1 x i64] [i64 30064771078]
// CHECK: call void @f3m(i32 1, i32 2, i32 3, i32 4, i32 5, [1 x i64] [i64 30064771078]
// CHECK: declare void @f3(i32, [1 x i64])
// CHECK: declare void @f3m(i32, i32, i32, i32, i32, [1 x i64])
// Increased natural alignment, capped to 8 though.
struct SF16 {
int x;
int y alignas(16);
int z, a, b, c, d, e, f, g, h, i, j, k;
};
void f4(int, SF16);
void f4m(int, int, int, int, int, SF16);
void g4() {
SF16 s = {6, 7};
f4(1, s);
f4m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g4
// CHECK: call void @f4(i32 1, %struct.SF16* nonnull byval(%struct.SF16) align 8
// CHECK: call void @f4m(i32 1, i32 2, i32 3, i32 4, i32 5, %struct.SF16* nonnull byval(%struct.SF16) align 8
// CHECK: declare void @f4(i32, %struct.SF16* byval(%struct.SF16) align 8)
// CHECK: declare void @f4m(i32, i32, i32, i32, i32, %struct.SF16* byval(%struct.SF16) align 8)
// Packed structure.
struct __attribute__((packed)) P {
int x;
long long u;
};
void f5(int, P);
void f5m(int, int, int, int, int, P);
void g5() {
P s = {6, 7};
f5(1, s);
f5m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g5
// CHECK: call void @f5(i32 1, [3 x i32] [i32 6, i32 7, i32 0])
// CHECK: call void @f5m(i32 1, i32 2, i32 3, i32 4, i32 5, [3 x i32] [i32 6, i32 7, i32 0])
// CHECK: declare void @f5(i32, [3 x i32])
// CHECK: declare void @f5m(i32, i32, i32, i32, i32, [3 x i32])
// Packed and aligned, alignement causes padding at the end.
struct __attribute__((packed, aligned(8))) P8 {
int x;
long long u;
};
void f6(int, P8);
void f6m(int, int, int, int, int, P8);
void g6() {
P8 s = {6, 7};
f6(1, s);
f6m(1, 2, 3, 4, 5, s);
}
// CHECK: define void @g6
// CHECK: call void @f6(i32 1, [4 x i32] [i32 6, i32 7, i32 0, i32 0])
// CHECK: call void @f6m(i32 1, i32 2, i32 3, i32 4, i32 5, [4 x i32] [i32 6, i32 7, i32 0, i32 0])
// CHECK: declare void @f6(i32, [4 x i32])
// CHECK: declare void @f6m(i32, i32, i32, i32, i32, [4 x i32])
}
|