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test some so-far untested intrinsics

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This commit is contained in:
Ralf Jung 2020-04-15 18:00:16 +02:00
parent e4eceba7d3
commit 07c696e27e
2 changed files with 18 additions and 3 deletions
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4
src/shims/intrinsics.rs
View file

@ -471,7 +471,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
"exact_div" =>
this.exact_div(this.read_immediate(args[0])?, this.read_immediate(args[1])?, dest)?,
"forget" => {}
"forget" => {
// We get an argument... and forget about it.
}
#[rustfmt::skip]
| "likely"

17
tests/run-pass/intrinsics.rs
View file

@ -1,8 +1,16 @@
#![feature(core_intrinsics)]
use std::intrinsics::type_name;
use std::intrinsics;
use std::mem::{size_of, size_of_val};
struct Bomb;
impl Drop for Bomb {
fn drop(&mut self) {
eprintln!("BOOM!");
}
}
fn main() {
assert_eq!(size_of::<Option<i32>>(), 8);
assert_eq!(size_of_val(&()), 0);
@ -11,5 +19,10 @@ fn main() {
assert_eq!(size_of_val(&[1, 2, 3] as &[i32]), 12);
assert_eq!(size_of_val("foobar"), 6);
assert_eq!(type_name::<Option<i32>>(), "core::option::Option<i32>");
assert_eq!(intrinsics::type_name::<Option<i32>>(), "core::option::Option<i32>");
assert_eq!(intrinsics::likely(false), false);
assert_eq!(intrinsics::unlikely(true), true);
unsafe { intrinsics::forget(Bomb); }
}