mirror of https://github.com/rust-lang/rust.git
88 lines
3.0 KiB
Rust
88 lines
3.0 KiB
Rust
//! Verify that Rust implements the expected calling convention for `i128`/`u128`.
|
|
|
|
// Eliminate intermediate instructions during `nop` tests
|
|
//@ compile-flags: -Copt-level=1
|
|
|
|
//@ add-core-stubs
|
|
//@ revisions: MSVC MINGW softfloat
|
|
//@ [MSVC] needs-llvm-components: x86
|
|
//@ [MSVC] compile-flags: --target x86_64-pc-windows-msvc
|
|
// Use `WIN` as a common prefix for MSVC and MINGW but *not* the softfloat test.
|
|
//@ [MSVC] filecheck-flags: --check-prefix=WIN
|
|
//@ [MINGW] needs-llvm-components: x86
|
|
//@ [MINGW] compile-flags: --target x86_64-pc-windows-gnu
|
|
//@ [MINGW] filecheck-flags: --check-prefix=WIN
|
|
// The `x86_64-unknown-uefi` target also uses the Windows calling convention,
|
|
// but does not have SSE registers available.
|
|
//@ [softfloat] needs-llvm-components: x86
|
|
//@ [softfloat] compile-flags: --target x86_64-unknown-uefi
|
|
|
|
#![crate_type = "lib"]
|
|
#![no_std]
|
|
#![no_core]
|
|
#![feature(no_core, lang_items)]
|
|
|
|
extern crate minicore;
|
|
|
|
extern "C" {
|
|
fn extern_call(arg0: i128);
|
|
fn extern_ret() -> i128;
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn pass(_arg0: u32, arg1: i128) {
|
|
// CHECK-LABEL: @pass(
|
|
// i128 is passed indirectly on Windows. It should load the pointer to the stack and pass
|
|
// a pointer to that allocation. The softfloat ABI works the same.
|
|
// CHECK-SAME: %_arg0, ptr{{.*}} %arg1)
|
|
// CHECK: [[PASS:%[_0-9]+]] = alloca [16 x i8], align 16
|
|
// CHECK: [[LOADED:%[_0-9]+]] = load i128, ptr %arg1
|
|
// CHECK: store i128 [[LOADED]], ptr [[PASS]]
|
|
// CHECK: call void @extern_call
|
|
unsafe { extern_call(arg1) };
|
|
}
|
|
|
|
// Check that we produce the correct return ABI
|
|
#[no_mangle]
|
|
pub extern "C" fn ret(_arg0: u32, arg1: i128) -> i128 {
|
|
// WIN-LABEL: @ret(
|
|
// i128 is returned in xmm0 on Windows
|
|
// FIXME(#134288): This may change for the `-msvc` targets in the future.
|
|
// WIN-SAME: i32{{.*}} %_arg0, ptr{{.*}} %arg1)
|
|
// WIN: [[LOADED:%[_0-9]+]] = load <16 x i8>, ptr %arg1
|
|
// WIN-NEXT: ret <16 x i8> [[LOADED]]
|
|
// The softfloat ABI returns this indirectly.
|
|
// softfloat-LABEL: i128 @ret(i32{{.*}} %_arg0, ptr{{.*}} %arg1)
|
|
arg1
|
|
}
|
|
|
|
// Check that we consume the correct return ABI
|
|
#[no_mangle]
|
|
pub extern "C" fn forward(dst: *mut i128) {
|
|
// CHECK-LABEL: @forward
|
|
// WIN-SAME: ptr{{.*}} %dst)
|
|
// WIN: [[RETURNED:%[_0-9]+]] = tail call <16 x i8> @extern_ret()
|
|
// WIN: store <16 x i8> [[RETURNED]], ptr %dst
|
|
// WIN: ret void
|
|
// softfloat: [[RETURNED:%[_0-9]+]] = tail call {{.*}}i128 @extern_ret()
|
|
unsafe { *dst = extern_ret() };
|
|
}
|
|
|
|
#[repr(C)]
|
|
struct RetAggregate {
|
|
a: i32,
|
|
b: i128,
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub extern "C" fn ret_aggregate(_arg0: u32, arg1: i128) -> RetAggregate {
|
|
// CHECK-LABEL: @ret_aggregate(
|
|
// Aggregates should also be returned indirectly
|
|
// CHECK-SAME: ptr{{.*}}sret([32 x i8]){{.*}}[[RET:%[_0-9]+]], i32{{.*}}%_arg0, ptr{{.*}}%arg1)
|
|
// CHECK: [[LOADED:%[_0-9]+]] = load i128, ptr %arg1
|
|
// CHECK: [[GEP:%[_0-9]+]] = getelementptr{{.*}}, ptr [[RET]]
|
|
// CHECK: store i128 [[LOADED]], ptr [[GEP]]
|
|
// CHECK: ret void
|
|
RetAggregate { a: 1, b: arg1 }
|
|
}
|