mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
102 lines
3.0 KiB
Rust
102 lines
3.0 KiB
Rust
// compile-flags: -Zvirtual-function-elimination -Clto -O -Csymbol-mangling-version=v0
|
|
// ignore-32bit
|
|
// ignore-debug
|
|
|
|
// CHECK: @vtable.0 = {{.*}}, !type ![[TYPE0:[0-9]+]], !vcall_visibility ![[VCALL_VIS0:[0-9]+]]
|
|
// CHECK: @vtable.1 = {{.*}}, !type ![[TYPE1:[0-9]+]], !vcall_visibility ![[VCALL_VIS0:[0-9]+]]
|
|
// CHECK: @vtable.2 = {{.*}}, !type ![[TYPE2:[0-9]+]], !vcall_visibility ![[VCALL_VIS2:[0-9]+]]
|
|
|
|
#![crate_type = "lib"]
|
|
#![allow(incomplete_features)]
|
|
#![feature(unsized_locals)]
|
|
|
|
use std::rc::Rc;
|
|
|
|
trait T {
|
|
// CHECK-LABEL: ; <virtual_function_elimination::S as virtual_function_elimination::T>::used
|
|
fn used(&self) -> i32 {
|
|
1
|
|
}
|
|
// CHECK-LABEL: ; <virtual_function_elimination::S as virtual_function_elimination::T>::used_through_sub_trait
|
|
fn used_through_sub_trait(&self) -> i32 {
|
|
3
|
|
}
|
|
// CHECK-LABEL: ; <virtual_function_elimination::S as virtual_function_elimination::T>::by_rc
|
|
fn by_rc(self: Rc<Self>) -> i32 {
|
|
self.used() + self.used()
|
|
}
|
|
// CHECK-LABEL-NOT: {{.*}}::unused
|
|
fn unused(&self) -> i32 {
|
|
2
|
|
}
|
|
// CHECK-LABEL-NOT: {{.*}}::by_rc_unused
|
|
fn by_rc_unused(self: Rc<Self>) -> i32 {
|
|
self.by_rc()
|
|
}
|
|
}
|
|
|
|
trait U: T {
|
|
// CHECK-LABEL: ; <virtual_function_elimination::S as virtual_function_elimination::U>::subtrait_used
|
|
fn subtrait_used(&self) -> i32 {
|
|
4
|
|
}
|
|
// CHECK-LABEL-NOT: {{.*}}::subtrait_unused
|
|
fn subtrait_unused(&self) -> i32 {
|
|
5
|
|
}
|
|
}
|
|
|
|
pub trait V {
|
|
// CHECK-LABEL: ; <virtual_function_elimination::S as virtual_function_elimination::V>::public_function
|
|
fn public_function(&self) -> i32;
|
|
}
|
|
|
|
#[derive(Copy, Clone)]
|
|
struct S;
|
|
|
|
impl T for S {}
|
|
|
|
impl U for S {}
|
|
|
|
impl V for S {
|
|
fn public_function(&self) -> i32 {
|
|
6
|
|
}
|
|
}
|
|
|
|
fn taking_t(t: &dyn T) -> i32 {
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 24, metadata !"[[MANGLED_TYPE0:[0-9a-zA-Z_]+]]")
|
|
t.used()
|
|
}
|
|
|
|
fn taking_rc_t(t: Rc<dyn T>) -> i32 {
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 40, metadata !"[[MANGLED_TYPE0:[0-9a-zA-Z_]+]]")
|
|
t.by_rc()
|
|
}
|
|
|
|
fn taking_u(u: &dyn U) -> i32 {
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 64, metadata !"[[MANGLED_TYPE1:[0-9a-zA-Z_]+]]")
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 24, metadata !"[[MANGLED_TYPE1:[0-9a-zA-Z_]+]]")
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 32, metadata !"[[MANGLED_TYPE1:[0-9a-zA-Z_]+]]")
|
|
u.subtrait_used() + u.used() + u.used_through_sub_trait()
|
|
}
|
|
|
|
pub fn taking_v(v: &dyn V) -> i32 {
|
|
// CHECK: @llvm.type.checked.load({{.*}}, i32 24, metadata !"NtCs64ITQYi9761_28virtual_function_elimination1V")
|
|
v.public_function()
|
|
}
|
|
|
|
pub fn main() {
|
|
let s = S;
|
|
taking_t(&s);
|
|
taking_rc_t(Rc::new(s));
|
|
taking_u(&s);
|
|
taking_v(&s);
|
|
}
|
|
|
|
// CHECK: ![[TYPE0]] = !{i64 0, !"[[MANGLED_TYPE0]]"}
|
|
// CHECK: ![[VCALL_VIS0]] = !{i64 2}
|
|
// CHECK: ![[TYPE1]] = !{i64 0, !"[[MANGLED_TYPE1]]"}
|
|
// CHECK: ![[TYPE2]] = !{i64 0, !"NtCs64ITQYi9761_28virtual_function_elimination1V"}
|
|
// CHECK: ![[VCALL_VIS2]] = !{i64 1}
|