mirror of https://github.com/rust-lang/rust
58 lines
1.3 KiB
Rust
58 lines
1.3 KiB
Rust
//@ compile-flags: -Z panic-in-drop=abort -O
|
|
//@ ignore-msvc
|
|
|
|
// Ensure that unwinding code paths are eliminated from the output after
|
|
// optimization.
|
|
|
|
// This test uses ignore-msvc, because the expected optimization does not happen on targets using
|
|
// SEH exceptions with the new LLVM pass manager anymore, see
|
|
// https://github.com/llvm/llvm-project/issues/51311.
|
|
|
|
// CHECK-NOT: {{(call|invoke).*}}should_not_appear_in_output
|
|
|
|
#![crate_type = "lib"]
|
|
use std::any::Any;
|
|
use std::mem::forget;
|
|
|
|
pub struct ExternDrop;
|
|
impl Drop for ExternDrop {
|
|
#[inline(always)]
|
|
fn drop(&mut self) {
|
|
// This call may potentially unwind.
|
|
extern "Rust" {
|
|
fn extern_drop();
|
|
}
|
|
unsafe {
|
|
extern_drop();
|
|
}
|
|
}
|
|
}
|
|
|
|
struct AssertNeverDrop;
|
|
impl Drop for AssertNeverDrop {
|
|
#[inline(always)]
|
|
fn drop(&mut self) {
|
|
// This call should be optimized away as unreachable.
|
|
extern "C" {
|
|
fn should_not_appear_in_output();
|
|
}
|
|
unsafe {
|
|
should_not_appear_in_output();
|
|
}
|
|
}
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub fn normal_drop(x: ExternDrop) {
|
|
let guard = AssertNeverDrop;
|
|
drop(x);
|
|
forget(guard);
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub fn indirect_drop(x: Box<dyn Any>) {
|
|
let guard = AssertNeverDrop;
|
|
drop(x);
|
|
forget(guard);
|
|
}
|