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//@ 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);
}
|
