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//@ revisions: DEBUG LLVM-PRE-20-OPTIM LLVM-20-OPTIM
//@ [DEBUG] compile-flags: -C opt-level=0
//@ [LLVM-PRE-20-OPTIM] compile-flags: -C opt-level=3
//@ [LLVM-PRE-20-OPTIM] max-llvm-major-version: 19
//@ [LLVM-20-OPTIM] compile-flags: -C opt-level=3
//@ [LLVM-20-OPTIM] min-llvm-version: 20
//@ assembly-output: emit-asm
//@ compile-flags: --crate-type=lib -C llvm-args=-x86-asm-syntax=intel
//@ only-x86_64
//@ ignore-sgx
#![feature(core_intrinsics)]
use std::intrinsics::three_way_compare;
#[no_mangle]
// CHECK-LABEL: signed_cmp:
pub fn signed_cmp(a: i16, b: i16) -> std::cmp::Ordering {
// DEBUG: cmp
// DEBUG: setg
// DEBUG: and
// DEBUG: cmp
// DEBUG: setl
// DEBUG: and
// DEBUG: sub
// LLVM-PRE-20-OPTIM: xor
// LLVM-PRE-20-OPTIM: cmp
// LLVM-PRE-20-OPTIM: setne
// LLVM-PRE-20-OPTIM: mov
// LLVM-PRE-20-OPTIM: cmovge
// LLVM-PRE-20-OPTIM: ret
//
// LLVM-20-OPTIM: cmp
// LLVM-20-OPTIM: setl
// LLVM-20-OPTIM: setg
// LLVM-20-OPTIM: sub
// LLVM-20-OPTIM: ret
three_way_compare(a, b)
}
#[no_mangle]
// CHECK-LABEL: unsigned_cmp:
pub fn unsigned_cmp(a: u16, b: u16) -> std::cmp::Ordering {
// DEBUG: cmp
// DEBUG: seta
// DEBUG: and
// DEBUG: cmp
// DEBUG: setb
// DEBUG: and
// DEBUG: sub
// LLVM-PRE-20-OPTIM: xor
// LLVM-PRE-20-OPTIM: cmp
// LLVM-PRE-20-OPTIM: setne
// LLVM-PRE-20-OPTIM: mov
// LLVM-PRE-20-OPTIM: cmovae
// LLVM-PRE-20-OPTIM: ret
//
// LLVM-20-OPTIM: cmp
// LLVM-20-OPTIM: seta
// LLVM-20-OPTIM: sbb
// LLVM-20-OPTIM: ret
three_way_compare(a, b)
}
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