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// compile-flags: -C no-prepopulate-passes
// ignore-tidy-linelength
#![crate_type = "lib"]
#![feature(c_variadic)]
#![feature(unwind_attributes)]
#![no_std]
use core::ffi::VaList;
extern "C" {
fn foreign_c_variadic_0(_: i32, ...);
fn foreign_c_variadic_1(_: VaList, ...);
}
#[unwind(aborts)] // FIXME(#58794)
pub unsafe extern "C" fn use_foreign_c_variadic_0() {
// Ensure that we correctly call foreign C-variadic functions.
// CHECK: invoke void (i32, ...) @foreign_c_variadic_0([[PARAM:i32( signext)?]] 0)
foreign_c_variadic_0(0);
// CHECK: invoke void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42)
foreign_c_variadic_0(0, 42i32);
// CHECK: invoke void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024)
foreign_c_variadic_0(0, 42i32, 1024i32);
// CHECK: invoke 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.
#[unwind(aborts)] // FIXME(#58794)
pub unsafe extern "C" fn use_foreign_c_variadic_1_0(ap: VaList) {
// CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap)
foreign_c_variadic_1(ap);
}
#[unwind(aborts)] // FIXME(#58794)
pub unsafe extern "C" fn use_foreign_c_variadic_1_1(ap: VaList) {
// CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 42)
foreign_c_variadic_1(ap, 42i32);
}
#[unwind(aborts)] // FIXME(#58794)
pub unsafe extern "C" fn use_foreign_c_variadic_1_2(ap: VaList) {
// CHECK: invoke void ({{.*}}*, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 2, [[PARAM]] 42)
foreign_c_variadic_1(ap, 2i32, 42i32);
}
#[unwind(aborts)] // FIXME(#58794)
pub unsafe extern "C" fn use_foreign_c_variadic_1_3(ap: VaList) {
// CHECK: invoke 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);
}
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