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#![feature(custom_mir, core_intrinsics)]
extern crate core;
use core::intrinsics::mir::*;
use core::ptr::{addr_of, addr_of_mut};
// EMIT_MIR references.mut_ref.built.after.mir
#[custom_mir(dialect = "runtime", phase = "optimized")]
pub fn mut_ref(x: &mut i32) -> &mut i32 {
mir!(
let t: *mut i32;
{
t = addr_of_mut!(*x);
RET = &mut *t;
Retag(RET);
Return()
}
)
}
// EMIT_MIR references.immut_ref.built.after.mir
#[custom_mir(dialect = "runtime", phase = "optimized")]
pub fn immut_ref(x: &i32) -> &i32 {
mir!(
let t: *const i32;
{
t = addr_of!(*x);
RET = & *t;
Retag(RET);
Return()
}
)
}
// EMIT_MIR references.raw_pointer.built.after.mir
#[custom_mir(dialect = "built")]
pub fn raw_pointer(x: *const i32) -> *const i32 {
// Regression test for a bug in which unsafetyck was not correctly turned off for
// `dialect = "built"`
mir!({
RET = addr_of!(*x);
Return()
})
}
// EMIT_MIR references.raw_pointer_offset.built.after.mir
#[custom_mir(dialect = "built")]
pub fn raw_pointer_offset(x: *const i32) -> *const i32 {
mir!({
RET = Offset(x, 1_isize);
Return()
})
}
fn main() {
let mut x = 5;
let arr = [1, 2];
assert_eq!(*mut_ref(&mut x), 5);
assert_eq!(*immut_ref(&x), 5);
unsafe {
assert_eq!(*raw_pointer(addr_of!(x)), 5);
assert_eq!(*raw_pointer_offset(addr_of!(arr[0])), 2);
}
}
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