73 lines
2.8 KiB
Rust
73 lines
2.8 KiB
Rust
// ignore-wasm32-bare compiled with panic=abort by default
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// compile-flags: -C no-prepopulate-passes -Copt-level=0
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//
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#![crate_type = "lib"]
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#![feature(c_variadic)]
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#![feature(c_unwind)]
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#![no_std]
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use core::ffi::VaList;
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extern "C" {
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fn foreign_c_variadic_0(_: i32, ...);
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fn foreign_c_variadic_1(_: VaList, ...);
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}
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pub unsafe extern "C" fn use_foreign_c_variadic_0() {
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// Ensure that we correctly call foreign C-variadic functions.
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// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM:i32( signext)?]] 0)
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foreign_c_variadic_0(0);
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// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42)
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foreign_c_variadic_0(0, 42i32);
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// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024)
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foreign_c_variadic_0(0, 42i32, 1024i32);
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// CHECK: call void (i32, ...) @foreign_c_variadic_0([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024, [[PARAM]] 0)
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foreign_c_variadic_0(0, 42i32, 1024i32, 0i32);
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}
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// Ensure that we do not remove the `va_list` passed to the foreign function when
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// removing the "spoofed" `VaListImpl` that is used by Rust defined C-variadics.
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pub unsafe extern "C" fn use_foreign_c_variadic_1_0(ap: VaList) {
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// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap)
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foreign_c_variadic_1(ap);
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}
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pub unsafe extern "C" fn use_foreign_c_variadic_1_1(ap: VaList) {
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// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 42)
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foreign_c_variadic_1(ap, 42i32);
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}
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pub unsafe extern "C" fn use_foreign_c_variadic_1_2(ap: VaList) {
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// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 2, [[PARAM]] 42)
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foreign_c_variadic_1(ap, 2i32, 42i32);
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}
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pub unsafe extern "C" fn use_foreign_c_variadic_1_3(ap: VaList) {
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// CHECK: call void ({{.*}}, ...) @foreign_c_variadic_1({{.*}} %ap, [[PARAM]] 2, [[PARAM]] 42, [[PARAM]] 0)
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foreign_c_variadic_1(ap, 2i32, 42i32, 0i32);
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}
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// Ensure that `va_start` and `va_end` are properly injected.
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#[no_mangle]
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pub unsafe extern "C" fn c_variadic(n: i32, mut ap: ...) -> i32 {
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// CHECK: call void @llvm.va_start
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let mut sum = 0;
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for _ in 0..n {
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sum += ap.arg::<i32>();
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}
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sum
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// CHECK: call void @llvm.va_end
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}
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// Ensure that we generate the correct `call` signature when calling a Rust
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// defined C-variadic.
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pub unsafe fn test_c_variadic_call() {
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// CHECK: call [[RET:(signext )?i32]] (i32, ...) @c_variadic([[PARAM]] 0)
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c_variadic(0);
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// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42)
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c_variadic(0, 42i32);
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// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024)
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c_variadic(0, 42i32, 1024i32);
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// CHECK: call [[RET]] (i32, ...) @c_variadic([[PARAM]] 0, [[PARAM]] 42, [[PARAM]] 1024, [[PARAM]] 0)
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c_variadic(0, 42i32, 1024i32, 0i32);
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}
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