1 // compile-flags: -C no-prepopulate-passes
4 #![feature(c_variadic)]
9 fn foreign_c_variadic_0(_: i32, ...);
10 fn foreign_c_variadic_1(_: VaList, ...);
13 pub unsafe extern "C" fn use_foreign_c_variadic_0() {
14 // Ensure that we correctly call foreign C-variadic functions.
15 // CHECK: invoke void (i32, ...) @foreign_c_variadic_0(i32 0)
16 foreign_c_variadic_0(0);
17 // CHECK: invoke void (i32, ...) @foreign_c_variadic_0(i32 0, i32 42)
18 foreign_c_variadic_0(0, 42i32);
19 // CHECK: invoke void (i32, ...) @foreign_c_variadic_0(i32 0, i32 42, i32 1024)
20 foreign_c_variadic_0(0, 42i32, 1024i32);
21 // CHECK: invoke void (i32, ...) @foreign_c_variadic_0(i32 0, i32 42, i32 1024, i32 0)
22 foreign_c_variadic_0(0, 42i32, 1024i32, 0i32);
25 // Ensure that we do not remove the `va_list` passed to the foreign function when
26 // removing the "spoofed" `VaList` that is used by Rust defined C-variadics.
27 pub unsafe extern "C" fn use_foreign_c_variadic_1_0(ap: VaList) {
28 // CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap)
29 foreign_c_variadic_1(ap);
32 pub unsafe extern "C" fn use_foreign_c_variadic_1_1(ap: VaList) {
33 // CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap, i32 42)
34 foreign_c_variadic_1(ap, 42i32);
36 pub unsafe extern "C" fn use_foreign_c_variadic_1_2(ap: VaList) {
37 // CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap, i32 2, i32 42)
38 foreign_c_variadic_1(ap, 2i32, 42i32);
41 pub unsafe extern "C" fn use_foreign_c_variadic_1_3(ap: VaList) {
42 // CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap, i32 2, i32 42, i32 0)
43 foreign_c_variadic_1(ap, 2i32, 42i32, 0i32);
46 // Ensure that `va_start` and `va_end` are properly injected.
48 pub unsafe extern "C" fn c_variadic(n: i32, mut ap: ...) -> i32 {
49 // CHECK: call void @llvm.va_start
52 sum += ap.arg::<i32>();
55 // CHECK: call void @llvm.va_end
58 // Ensure that we generate the correct `call` signature when calling a Rust
59 // defined C-variadic.
60 pub unsafe fn test_c_variadic_call() {
61 // CHECK: call i32 (i32, ...) @c_variadic(i32 0)
63 // CHECK: call i32 (i32, ...) @c_variadic(i32 0, i32 42)
65 // CHECK: call i32 (i32, ...) @c_variadic(i32 0, i32 42, i32 1024)
66 c_variadic(0, 42i32, 1024i32);
67 // CHECK: call i32 (i32, ...) @c_variadic(i32 0, i32 42, i32 1024, i32 0)
68 c_variadic(0, 42i32, 1024i32, 0i32);