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
|
// RUN: %clang_cc1 -triple aarch64-windows -ffreestanding -emit-llvm -O0 \
// RUN: -x c++ -o - %s | FileCheck %s
// Pass and return for type size <= 8 bytes.
// CHECK: define {{.*}} i64 @{{.*}}f1{{.*}}()
// CHECK: call i64 {{.*}}func1{{.*}}(i64 %3)
struct S1 {
int a[2];
};
S1 func1(S1 x);
S1 f1() {
S1 x;
return func1(x);
}
// Pass and return type size <= 16 bytes.
// CHECK: define {{.*}} [2 x i64] @{{.*}}f2{{.*}}()
// CHECK: call [2 x i64] {{.*}}func2{{.*}}([2 x i64] %3)
struct S2 {
int a[4];
};
S2 func2(S2 x);
S2 f2() {
S2 x;
return func2(x);
}
// Pass and return for type size > 16 bytes.
// CHECK: define {{.*}} void @{{.*}}f3{{.*}}(%struct.S3* noalias sret %agg.result)
// CHECK: call void {{.*}}func3{{.*}}(%struct.S3* sret %agg.result, %struct.S3* %agg.tmp)
struct S3 {
int a[5];
};
S3 func3(S3 x);
S3 f3() {
S3 x;
return func3(x);
}
// Pass and return aggregate (of size < 16 bytes) with non-trivial destructor.
// Passed directly but returned indirectly.
// CHECK: define {{.*}} void {{.*}}f4{{.*}}(%struct.S4* inreg noalias sret %agg.result)
// CHECK: call void {{.*}}func4{{.*}}(%struct.S4* inreg sret %agg.result, [2 x i64] %4)
struct S4 {
int a[3];
~S4();
};
S4 func4(S4 x);
S4 f4() {
S4 x;
return func4(x);
}
// Pass and return from instance method called from instance method.
// CHECK: define {{.*}} void @{{.*}}bar@Q1{{.*}}(%class.Q1* %this, %class.P1* inreg noalias sret %agg.result)
// CHECK: call void {{.*}}foo@P1{{.*}}(%class.P1* %ref.tmp, %class.P1* inreg sret %agg.result, i8 %0)
class P1 {
public:
P1 foo(P1 x);
};
class Q1 {
public:
P1 bar();
};
P1 Q1::bar() {
P1 p1;
return P1().foo(p1);
}
// Pass and return from instance method called from free function.
// CHECK: define {{.*}} void {{.*}}bar{{.*}}()
// CHECK: call void {{.*}}foo@P2{{.*}}(%class.P2* %ref.tmp, %class.P2* inreg sret %retval, i8 %0)
class P2 {
public:
P2 foo(P2 x);
};
P2 bar() {
P2 p2;
return P2().foo(p2);
}
// Pass and return an object with a user-provided constructor (passed directly,
// returned indirectly)
// CHECK: define {{.*}} void @{{.*}}f5{{.*}}(%struct.S5* inreg noalias sret %agg.result)
// CHECK: call void {{.*}}func5{{.*}}(%struct.S5* inreg sret %agg.result, i64 {{.*}})
struct S5 {
S5();
int x;
};
S5 func5(S5 x);
S5 f5() {
S5 x;
return func5(x);
}
// Pass and return an object with a non-trivial explicitly defaulted constructor
// (passed directly, returned directly)
// CHECK: define {{.*}} i64 @"?f6@@YA?AUS6@@XZ"()
// CHECK: call i64 {{.*}}func6{{.*}}(i64 {{.*}})
struct S6a {
S6a();
};
struct S6 {
S6() = default;
S6a x;
};
S6 func6(S6 x);
S6 f6() {
S6 x;
return func6(x);
}
// Pass and return an object with a non-trivial implicitly defaulted constructor
// (passed directly, returned directly)
// CHECK: define {{.*}} i64 @"?f7@@YA?AUS7@@XZ"()
// CHECK: call i64 {{.*}}func7{{.*}}(i64 {{.*}})
struct S7 {
S6a x;
};
S7 func7(S7 x);
S7 f7() {
S7 x;
return func7(x);
}
struct S8a {
~S8a();
};
// Pass and return an object with a non-trivial default destructor (passed
// directly, returne indirectly)
struct S8 {
S8a x;
int y;
};
// CHECK: define {{.*}} void {{.*}}?f8{{.*}}(%struct.S8* inreg noalias sret {{.*}})
// CHECK: call void {{.*}}func8{{.*}}(%struct.S8* inreg sret {{.*}}, i64 {{.*}})
S8 func8(S8 x);
S8 f8() {
S8 x;
return func8(x);
}
// Pass and return an object with a non-trivial copy-assignment operator and
// a trivial copy constructor (passed directly, returned indirectly)
// CHECK: define {{.*}} void @"?f9@@YA?AUS9@@XZ"(%struct.S9* inreg noalias sret {{.*}})
// CHECK: call void {{.*}}func9{{.*}}(%struct.S9* inreg sret {{.*}}, i64 {{.*}})
struct S9 {
S9& operator=(const S9&);
int x;
};
S9 func9(S9 x);
S9 f9() {
S9 x;
S9 y = x;
x = y;
return func9(x);
}
// Pass and return an object with a base class (passed directly, returned
// indirectly).
// CHECK: define dso_local void {{.*}}f10{{.*}}(%struct.S10* inreg noalias sret {{.*}})
// CHECK: call void {{.*}}func10{{.*}}(%struct.S10* inreg sret {{.*}}, [2 x i64] {{.*}})
struct S10 : public S1 {
int x;
};
S10 func10(S10 x);
S10 f10() {
S10 x;
return func10(x);
}
// Pass and return a non aggregate object exceeding > 128 bits (passed
// indirectly, returned indirectly)
// CHECK: define dso_local void {{.*}}f11{{.*}}(%struct.S11* inreg noalias sret {{.*}})
// CHECK: call void {{.*}}func11{{.*}}(%struct.S11* inreg sret {{.*}}, %struct.S11* {{.*}})
struct S11 {
virtual void f();
int a[5];
};
S11 func11(S11 x);
S11 f11() {
S11 x;
return func11(x);
}
|
