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Add a test for -Zprint-vtable-sizes

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This commit is contained in:
Maybe Waffle 2023-06-13 12:40:12 +00:00
parent dc0fba0238
commit af4631ad6e
2 changed files with 72 additions and 0 deletions
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61
tests/ui/traits/object/print_vtable_sizes.rs Normal file
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// check-pass
// compile-flags: -Z print-vtable-sizes
#![crate_type = "lib"]
trait A<T: help::V>: AsRef<[T::V]> + AsMut<[T::V]> {}
trait B<T>: AsRef<T> + AsRef<T> + AsRef<T> + AsRef<T> {}
trait C {
fn x() {} // not object safe, shouldn't be reported
}
// This ideally should not have any upcasting cost,
// but currently does due to a bug
trait D: Send + Sync + help::MarkerWithSuper {}
// This can't have no cost without reordering,
// because `Super::f`.
trait E: help::MarkerWithSuper + Send + Sync {}
trait F {
fn a(&self);
fn b(&self);
fn c(&self);
fn d() -> Self
where
Self: Sized;
}
trait G: AsRef<u8> + AsRef<u16> + help::MarkerWithSuper {
fn a(&self);
fn b(&self);
fn c(&self);
fn d(&self);
fn e(&self);
fn f() -> Self
where
Self: Sized;
}
// Traits with the same name
const _: () = {
trait S {}
};
const _: () = {
trait S {}
};
mod help {
pub trait V {
type V;
}
pub trait MarkerWithSuper: Super {}
pub trait Super {
fn f(&self);
}
}

11
tests/ui/traits/object/print_vtable_sizes.stdout Normal file
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print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "D", "entries": "7", "entries_ignoring_upcasting": "4", "entries_for_upcasting": "3", "upcasting_cost_percent": "75" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "E", "entries": "6", "entries_ignoring_upcasting": "4", "entries_for_upcasting": "2", "upcasting_cost_percent": "50" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "G", "entries": "14", "entries_ignoring_upcasting": "11", "entries_for_upcasting": "3", "upcasting_cost_percent": "27.27272727272727" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "A", "entries": "6", "entries_ignoring_upcasting": "5", "entries_for_upcasting": "1", "upcasting_cost_percent": "20" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "B", "entries": "4", "entries_ignoring_upcasting": "4", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "F", "entries": "6", "entries_ignoring_upcasting": "6", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "_::S", "entries": "3", "entries_ignoring_upcasting": "3", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "_::S", "entries": "3", "entries_ignoring_upcasting": "3", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "help::MarkerWithSuper", "entries": "4", "entries_ignoring_upcasting": "4", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "help::Super", "entries": "4", "entries_ignoring_upcasting": "4", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }
print-vtable-sizes { "crate_name": "<UNKNOWN_CRATE>", "trait_name": "help::V", "entries": "3", "entries_ignoring_upcasting": "3", "entries_for_upcasting": "0", "upcasting_cost_percent": "0" }