mirror of
https://github.com/rust-lang/rust
synced 2024-09-30 13:54:31 +00:00
72800d3b89
Except for `simd-intrinsic/`, which has a lot of files containing multiple types like `u8x64` which really are better when hand-formatted. There is a surprising amount of two-space indenting in this directory. Non-trivial changes: - `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the test. - `rustfmt::skip` used in a few places where hand-formatting read more nicely: `enum/enum-match.rs` - Line number adjustments needed for the expected output of `debug-column.rs` and `coroutine-debug.rs`.
86 lines
2.3 KiB
Rust
86 lines
2.3 KiB
Rust
//! This file tests that we correctly generate GEP instructions for vtable upcasting.
|
|
//@ compile-flags: -C no-prepopulate-passes -Copt-level=0
|
|
|
|
#![crate_type = "lib"]
|
|
#![feature(trait_upcasting)]
|
|
|
|
pub trait Base {
|
|
fn base(&self);
|
|
}
|
|
|
|
pub trait A: Base {
|
|
fn a(&self);
|
|
}
|
|
|
|
pub trait B: Base {
|
|
fn b(&self);
|
|
}
|
|
|
|
pub trait Diamond: A + B {
|
|
fn diamond(&self);
|
|
}
|
|
|
|
// CHECK-LABEL: upcast_a_to_base
|
|
#[no_mangle]
|
|
pub fn upcast_a_to_base(x: &dyn A) -> &dyn Base {
|
|
// Requires no adjustment, since its vtable is extended from `Base`.
|
|
|
|
// CHECK: start:
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: ret
|
|
x as &dyn Base
|
|
}
|
|
|
|
// CHECK-LABEL: upcast_b_to_base
|
|
#[no_mangle]
|
|
pub fn upcast_b_to_base(x: &dyn B) -> &dyn Base {
|
|
// Requires no adjustment, since its vtable is extended from `Base`.
|
|
|
|
// CHECK: start:
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: ret
|
|
x as &dyn Base
|
|
}
|
|
|
|
// CHECK-LABEL: upcast_diamond_to_a
|
|
#[no_mangle]
|
|
pub fn upcast_diamond_to_a(x: &dyn Diamond) -> &dyn A {
|
|
// Requires no adjustment, since its vtable is extended from `A` (as the first supertrait).
|
|
|
|
// CHECK: start:
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: ret
|
|
x as &dyn A
|
|
}
|
|
|
|
// CHECK-LABEL: upcast_diamond_to_b
|
|
// CHECK-SAME: (ptr align {{[0-9]+}} [[DATA_PTR:%.+]], ptr align {{[0-9]+}} [[VTABLE_PTR:%.+]])
|
|
#[no_mangle]
|
|
pub fn upcast_diamond_to_b(x: &dyn Diamond) -> &dyn B {
|
|
// Requires adjustment, since it's a non-first supertrait.
|
|
|
|
// CHECK: start:
|
|
// CHECK-NEXT: [[UPCAST_SLOT_PTR:%.+]] = getelementptr inbounds i8, ptr [[VTABLE_PTR]]
|
|
// CHECK-NEXT: [[UPCAST_VTABLE_PTR:%.+]] = load ptr, ptr [[UPCAST_SLOT_PTR]]
|
|
// CHECK-NEXT: [[FAT_PTR_1:%.+]] = insertvalue { ptr, ptr } poison, ptr [[DATA_PTR]], 0
|
|
// CHECK-NEXT: [[FAT_PTR_2:%.+]] = insertvalue { ptr, ptr } [[FAT_PTR_1]], ptr [[UPCAST_VTABLE_PTR]], 1
|
|
// CHECK-NEXT: ret { ptr, ptr } [[FAT_PTR_2]]
|
|
x as &dyn B
|
|
}
|
|
|
|
// CHECK-LABEL: upcast_diamond_to_b
|
|
#[no_mangle]
|
|
pub fn upcast_diamond_to_base(x: &dyn Diamond) -> &dyn Base {
|
|
// Requires no adjustment, since `Base` is the first supertrait of `A`,
|
|
// which is the first supertrait of `Diamond`.
|
|
|
|
// CHECK: start:
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: insertvalue
|
|
// CHECK-NEXT: ret
|
|
x as &dyn Base
|
|
}
|