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Add a mir-opt test for an unneeded drop_in_place

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Scott McMurray 2025-07-27 21:37:17 -07:00
parent 07b7dc90ee
commit 9b107bed9f
2 changed files with 33 additions and 0 deletions
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13
tests/mir-opt/remove_unneeded_drop_in_place.rs Normal file
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//@ test-mir-pass: RemoveUnneededDrops
//@ needs-unwind
// EMIT_MIR remove_unneeded_drop_in_place.slice_in_place.RemoveUnneededDrops.diff
unsafe fn slice_in_place(ptr: *mut [char]) {
std::ptr::drop_in_place(ptr)
}
fn main() {
// CHECK-LABEL: fn main(
let mut a = ['o', 'k'];
unsafe { slice_in_place(&raw mut a) };
}

20
tests/mir-opt/remove_unneeded_drop_in_place.slice_in_place.RemoveUnneededDrops.diff Normal file
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- // MIR for `slice_in_place` before RemoveUnneededDrops
+ // MIR for `slice_in_place` after RemoveUnneededDrops
fn slice_in_place(_1: *mut [char]) -> () {
debug ptr => _1;
let mut _0: ();
let mut _2: *mut [char];
bb0: {
StorageLive(_2);
_2 = copy _1;
_0 = drop_in_place::<[char]>(move _2) -> [return: bb1, unwind continue];
}
bb1: {
StorageDead(_2);
return;
}
}