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// revisions: old new
// LLVM 17 realizes double panic is not possible and doesn't generate calls
// to panic_cannot_unwind.
// [old]ignore-llvm-version: 17 - 99
// [new]min-llvm-version: 17
// compile-flags: -O
// ignore-debug: the debug assertions get in the way
#![crate_type = "lib"]
#![feature(shrink_to)]
// Make sure that `Vec::shrink_to_fit` never emits panics via `RawVec::shrink_to_fit`,
// "Tried to shrink to a larger capacity", because the length is *always* <= capacity.
// CHECK-LABEL: @shrink_to_fit
#[no_mangle]
pub fn shrink_to_fit(vec: &mut Vec<u32>) {
// CHECK-NOT: panic
vec.shrink_to_fit();
}
// CHECK-LABEL: @issue71861
#[no_mangle]
pub fn issue71861(vec: Vec<u32>) -> Box<[u32]> {
// CHECK-NOT: panic
// Call to panic_cannot_unwind in case of double-panic is expected
// on LLVM 16 and older, but other panics are not.
// CHECK: cleanup
// old-NEXT: ; call core::panicking::panic_cannot_unwind
// old-NEXT: panic_cannot_unwind
// CHECK-NOT: panic
vec.into_boxed_slice()
}
// CHECK-LABEL: @issue75636
#[no_mangle]
pub fn issue75636<'a>(iter: &[&'a str]) -> Box<[&'a str]> {
// CHECK-NOT: panic
// Call to panic_cannot_unwind in case of double-panic is expected,
// on LLVM 16 and older, but other panics are not.
// CHECK: cleanup
// old-NEXT: ; call core::panicking::panic_cannot_unwind
// old-NEXT: panic_cannot_unwind
// CHECK-NOT: panic
iter.iter().copied().collect()
}
// old: ; core::panicking::panic_cannot_unwind
// old: declare void @{{.*}}panic_cannot_unwind
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