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
|
// RUN: %clang_cc1 -Wno-non-pod-varargs -emit-llvm %s -o - -triple=i686-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck %s
#include <stdarg.h>
struct A {
A(int a) : a(a) {}
A(const A &o) : a(o.a) {}
~A() {}
int a;
};
int foo(A a, ...) {
va_list ap;
va_start(ap, a);
int sum = 0;
for (int i = 0; i < a.a; ++i)
sum += va_arg(ap, int);
va_end(ap);
return sum;
}
// CHECK-LABEL: define dso_local noundef i32 @"?foo@@YAHUA@@ZZ"(ptr inalloca(<{ %struct.A }>) %0, ...)
int main() {
return foo(A(3), 1, 2, 3);
}
// CHECK-LABEL: define dso_local noundef i32 @main()
// CHECK: %[[argmem:[^ ]*]] = alloca inalloca <{ %struct.A, i32, i32, i32 }>
// CHECK: call noundef i32 (ptr, ...) @"?foo@@YAHUA@@ZZ"{{.*}}(ptr inalloca(<{ %struct.A, i32, i32, i32 }>) %[[argmem]])
void varargs_zero(...);
void varargs_one(int, ...);
void varargs_two(int, int, ...);
void varargs_three(int, int, int, ...);
void call_var_args() {
A x(3);
varargs_zero(x);
varargs_one(1, x);
varargs_two(1, 2, x);
varargs_three(1, 2, 3, x);
}
// CHECK-LABEL: define dso_local void @"?call_var_args@@YAXXZ"()
// CHECK: call void {{.*varargs_zero.*}}(ptr inalloca(<{ %struct.A }>) %{{.*}})
// CHECK: call void {{.*varargs_one.*}}(ptr inalloca(<{ i32, %struct.A }>) %{{.*}})
// CHECK: call void {{.*varargs_two.*}}(ptr inalloca(<{ i32, i32, %struct.A }>) %{{.*}})
// CHECK: call void {{.*varargs_three.*}}(ptr inalloca(<{ i32, i32, i32, %struct.A }>) %{{.*}})
// CHECK-LABEL: declare dso_local void @"?varargs_zero@@YAXZZ"(...)
// CHECK-LABEL: declare dso_local void @"?varargs_one@@YAXHZZ"(i32 noundef, ...)
// CHECK-LABEL: declare dso_local void @"?varargs_two@@YAXHHZZ"(i32 noundef, i32 noundef, ...)
// CHECK-LABEL: declare dso_local void @"?varargs_three@@YAXHHHZZ"(i32 noundef, i32 noundef, i32 noundef, ...)
|
