File: mod_bench.rs

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rustc 1.70.0%2Bdfsg1-9
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#![feature(start, core_intrinsics, lang_items)]
#![no_std]

#[cfg_attr(unix, link(name = "c"))]
#[cfg_attr(target_env = "msvc", link(name = "msvcrt"))]
extern {}

#[panic_handler]
fn panic_handler(_: &core::panic::PanicInfo) -> ! {
    core::intrinsics::abort();
}

#[lang="eh_personality"]
fn eh_personality(){}

// Required for rustc_codegen_llvm
#[no_mangle]
unsafe extern "C" fn _Unwind_Resume() {
    core::intrinsics::unreachable();
}

#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
    for i in 2..10_000_000 {
        black_box((i + 1) % i);
    }

    0
}

#[inline(never)]
fn black_box(i: u32) {
    if i != 1 {
        core::intrinsics::abort();
    }
}