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//@ assembly-output: emit-asm
//@ revisions: riscv64 riscv64-zbb loongarch64
//@ compile-flags: -C opt-level=3
//@ [riscv64] compile-flags: --target riscv64gc-unknown-linux-gnu
//@ [riscv64] needs-llvm-components: riscv
//@ [riscv64-zbb] compile-flags: --target riscv64gc-unknown-linux-gnu
//@ [riscv64-zbb] compile-flags: -C target-feature=+zbb
//@ [riscv64-zbb] needs-llvm-components: riscv
//@ [loongarch64] compile-flags: --target loongarch64-unknown-linux-gnu
//@ [loongarch64] needs-llvm-components: loongarch
#![feature(no_core, lang_items, intrinsics, rustc_attrs)]
#![crate_type = "lib"]
#![no_std]
#![no_core]
// FIXME: Migrate these code after PR #130693 is landed.
#[lang = "pointee_sized"]
pub trait PointeeSized {}
#[lang = "meta_sized"]
pub trait MetaSized: PointeeSized {}
#[lang = "sized"]
pub trait Sized: MetaSized {}
#[lang = "copy"]
trait Copy {}
impl Copy for i8 {}
impl Copy for u32 {}
impl Copy for i32 {}
#[lang = "neg"]
trait Neg {
type Output;
fn neg(self) -> Self::Output;
}
impl Neg for i8 {
type Output = i8;
fn neg(self) -> Self::Output {
-self
}
}
#[lang = "Ordering"]
#[repr(i8)]
enum Ordering {
Less = -1,
Equal = 0,
Greater = 1,
}
#[rustc_intrinsic]
fn three_way_compare<T: Copy>(lhs: T, rhs: T) -> Ordering;
// ^^^^^ core
// Reimplementation of function `{integer}::max`.
macro_rules! max {
($a:expr, $b:expr) => {
match three_way_compare($a, $b) {
Ordering::Less | Ordering::Equal => $b,
Ordering::Greater => $a,
}
};
}
#[no_mangle]
// CHECK-LABEL: issue_114508_u32:
pub fn issue_114508_u32(a: u32, b: u32) -> u32 {
// CHECK-NEXT: .cfi_startproc
// riscv64-NEXT: bltu a1, a0, .[[RET:.+]]
// riscv64-NEXT: mv a0, a1
// riscv64-NEXT: .[[RET]]:
// riscv64-zbb-NEXT: maxu a0, a0, a1
// loongarch64-NEXT: sltu $a2, $a1, $a0
// loongarch64-NEXT: masknez $a1, $a1, $a2
// loongarch64-NEXT: maskeqz $a0, $a0, $a2
// loongarch64-NEXT: or $a0, $a0, $a1
// CHECK-NEXT: ret
max!(a, b)
}
#[no_mangle]
// CHECK-LABEL: issue_114508_i32:
pub fn issue_114508_i32(a: i32, b: i32) -> i32 {
// CHECK-NEXT: .cfi_startproc
// riscv64-NEXT: blt a1, a0, .[[RET:.+]]
// riscv64-NEXT: mv a0, a1
// riscv64-NEXT: .[[RET]]:
// riscv64-zbb-NEXT: max a0, a0, a1
// loongarch64-NEXT: slt $a2, $a1, $a0
// loongarch64-NEXT: masknez $a1, $a1, $a2
// loongarch64-NEXT: maskeqz $a0, $a0, $a2
// loongarch64-NEXT: or $a0, $a0, $a1
// CHECK-NEXT: ret
max!(a, b)
}
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