rust/tests/codegen/float_math.rs

// compile-flags: -C no-prepopulate-passes

#![crate_type = "lib"]
#![feature(core_intrinsics)]

use std::intrinsics::{fadd_fast, fsub_fast, fmul_fast, fdiv_fast, frem_fast};

// CHECK-LABEL: @add
#[no_mangle]
pub fn add(x: f32, y: f32) -> f32 {
// CHECK: fadd float
// CHECK-NOT: fast
    x + y
}

// CHECK-LABEL: @addition
#[no_mangle]
pub fn addition(x: f32, y: f32) -> f32 {
// CHECK: fadd fast float
    unsafe {
        fadd_fast(x, y)
    }
}

// CHECK-LABEL: @subtraction
#[no_mangle]
pub fn subtraction(x: f32, y: f32) -> f32 {
// CHECK: fsub fast float
    unsafe {
        fsub_fast(x, y)
    }
}

// CHECK-LABEL: @multiplication
#[no_mangle]
pub fn multiplication(x: f32, y: f32) -> f32 {
// CHECK: fmul fast float
    unsafe {
        fmul_fast(x, y)
    }
}

// CHECK-LABEL: @division
#[no_mangle]
pub fn division(x: f32, y: f32) -> f32 {
// CHECK: fdiv fast float
    unsafe {
        fdiv_fast(x, y)
    }
}