mirror of https://github.com/rust-lang/rust.git
82 lines
2.3 KiB
Rust
82 lines
2.3 KiB
Rust
// unit-test: LowerIntrinsics
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// ignore-wasm32 compiled with panic=abort by default
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#![feature(core_intrinsics, intrinsics)]
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#![crate_type = "lib"]
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// EMIT_MIR lower_intrinsics.wrapping.LowerIntrinsics.diff
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pub fn wrapping(a: i32, b: i32) {
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let _x = core::intrinsics::wrapping_add(a, b);
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let _y = core::intrinsics::wrapping_sub(a, b);
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let _z = core::intrinsics::wrapping_mul(a, b);
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}
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// EMIT_MIR lower_intrinsics.size_of.LowerIntrinsics.diff
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pub fn size_of<T>() -> usize {
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core::intrinsics::size_of::<T>()
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}
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// EMIT_MIR lower_intrinsics.align_of.LowerIntrinsics.diff
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pub fn align_of<T>() -> usize {
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core::intrinsics::min_align_of::<T>()
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}
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// EMIT_MIR lower_intrinsics.forget.LowerIntrinsics.diff
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pub fn forget<T>(t: T) {
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core::intrinsics::forget(t)
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}
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// EMIT_MIR lower_intrinsics.unreachable.LowerIntrinsics.diff
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pub fn unreachable() -> ! {
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unsafe { core::intrinsics::unreachable() };
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}
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// EMIT_MIR lower_intrinsics.non_const.LowerIntrinsics.diff
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pub fn non_const<T>() -> usize {
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// Check that lowering works with non-const operand as a func.
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let size_of_t = core::intrinsics::size_of::<T>;
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size_of_t()
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}
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pub enum E {
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A,
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B,
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C,
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}
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// EMIT_MIR lower_intrinsics.discriminant.LowerIntrinsics.diff
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pub fn discriminant<T>(t: T) {
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core::intrinsics::discriminant_value(&t);
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core::intrinsics::discriminant_value(&0);
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core::intrinsics::discriminant_value(&());
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core::intrinsics::discriminant_value(&E::B);
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}
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extern "rust-intrinsic" {
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// Cannot use `std::intrinsics::copy_nonoverlapping` as that is a wrapper function
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fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
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}
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// EMIT_MIR lower_intrinsics.f_copy_nonoverlapping.LowerIntrinsics.diff
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pub fn f_copy_nonoverlapping() {
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let src = ();
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let mut dst = ();
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unsafe {
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copy_nonoverlapping(&src as *const _ as *const i32, &mut dst as *mut _ as *mut i32, 0);
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}
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}
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// EMIT_MIR lower_intrinsics.assume.LowerIntrinsics.diff
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pub fn assume() {
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unsafe {
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std::intrinsics::assume(true);
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}
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}
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// EMIT_MIR lower_intrinsics.with_overflow.LowerIntrinsics.diff
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pub fn with_overflow(a: i32, b: i32) {
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let _x = core::intrinsics::add_with_overflow(a, b);
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let _y = core::intrinsics::sub_with_overflow(a, b);
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let _z = core::intrinsics::mul_with_overflow(a, b);
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}
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