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