72 lines
2.8 KiB
Rust
72 lines
2.8 KiB
Rust
//@ needs-unwind
|
|
//@ compile-flags: -C no-prepopulate-passes -Copt-level=0
|
|
//
|
|
|
|
#![crate_type = "lib"]
|
|
#![feature(c_variadic)]
|
|
#![no_std]
|
|
use core::ffi::VaList;
|
|
|
|
extern "C" {
|
|
fn foreign_c_variadic_0(_: i32, ...);
|
|
fn foreign_c_variadic_1(_: VaList, ...);
|
|
}
|
|
|
|
pub unsafe extern "C" fn use_foreign_c_variadic_0() {
|
|
// Ensure that we correctly call foreign C-variadic functions.
|
|
// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM:i32( signext)?]] 0)
|
|
foreign_c_variadic_0(0);
|
|
// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42)
|
|
foreign_c_variadic_0(0, 42i32);
|
|
// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024)
|
|
foreign_c_variadic_0(0, 42i32, 1024i32);
|
|
// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024, [[PARAM]] 0)
|
|
foreign_c_variadic_0(0, 42i32, 1024i32, 0i32);
|
|
}
|
|
|
|
// Ensure that we do not remove the `va_list` passed to the foreign function when
|
|
// removing the "spoofed" `VaListImpl` that is used by Rust defined C-variadics.
|
|
pub unsafe extern "C" fn use_foreign_c_variadic_1_0(ap: VaList) {
|
|
// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap)
|
|
foreign_c_variadic_1(ap);
|
|
}
|
|
|
|
pub unsafe extern "C" fn use_foreign_c_variadic_1_1(ap: VaList) {
|
|
// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 42)
|
|
foreign_c_variadic_1(ap, 42i32);
|
|
}
|
|
pub unsafe extern "C" fn use_foreign_c_variadic_1_2(ap: VaList) {
|
|
// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 2, [[PARAM]] 42)
|
|
foreign_c_variadic_1(ap, 2i32, 42i32);
|
|
}
|
|
|
|
pub unsafe extern "C" fn use_foreign_c_variadic_1_3(ap: VaList) {
|
|
// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 2, [[PARAM]] 42, [[PARAM]] 0)
|
|
foreign_c_variadic_1(ap, 2i32, 42i32, 0i32);
|
|
}
|
|
|
|
// Ensure that `va_start` and `va_end` are properly injected.
|
|
#[no_mangle]
|
|
pub unsafe extern "C" fn c_variadic(n: i32, mut ap: ...) -> i32 {
|
|
// CHECK: call void @llvm.va_start
|
|
let mut sum = 0;
|
|
for _ in 0..n {
|
|
sum += ap.arg::<i32>();
|
|
}
|
|
sum
|
|
// CHECK: call void @llvm.va_end
|
|
}
|
|
|
|
// Ensure that we generate the correct `call` signature when calling a Rust
|
|
// defined C-variadic.
|
|
pub unsafe fn test_c_variadic_call() {
|
|
// CHECK: call [[RET:(signext )?i32]] (i32, ...) @c_variadic([[PARAM]] 0)
|
|
c_variadic(0);
|
|
// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42)
|
|
c_variadic(0, 42i32);
|
|
// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024)
|
|
c_variadic(0, 42i32, 1024i32);
|
|
// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024, [[PARAM]] 0)
|
|
c_variadic(0, 42i32, 1024i32, 0i32);
|
|
}
|