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