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75fa9f6dec
This commit is extracted from #122036 and adds a new directive to the `compiletest` test runner, `//@ needs-threads`. This is intended to capture the need that a target must implement threading to execute a specific test, typically one that uses `std::thread`. This is primarily done for WebAssembly targets which currently do not have threads by default. This enables transitioning a lot of `//@ ignore-wasm*`-style ignores into a more self-documenting `//@ needs-threads` directive. Additionally the `wasm32-wasi-preview1-threads` target, for example, does actually have threads, but isn't tested in CI at this time. This change enables running these tests for that target, but not other wasm targets.
73 lines
2.8 KiB
Rust
73 lines
2.8 KiB
Rust
//@ needs-unwind
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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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