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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:58 +0000 |
commit | a4b7ed7a42c716ab9f05e351f003d589124fd55d (patch) | |
tree | b620cd3f223850b28716e474e80c58059dca5dd4 /tests/codegen/c-variadic.rs | |
parent | Adding upstream version 1.67.1+dfsg1. (diff) | |
download | rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.tar.xz rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.zip |
Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/c-variadic.rs')
-rw-r--r-- | tests/codegen/c-variadic.rs | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/tests/codegen/c-variadic.rs b/tests/codegen/c-variadic.rs new file mode 100644 index 000000000..cab326522 --- /dev/null +++ b/tests/codegen/c-variadic.rs @@ -0,0 +1,72 @@ +// ignore-wasm32-bare compiled with panic=abort by default +// compile-flags: -C no-prepopulate-passes -Copt-level=0 +// + +#![crate_type = "lib"] +#![feature(c_variadic)] +#![feature(c_unwind)] +#![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); +} |