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// compile-flags:-Zpolymorphize=on -Zprint-mono-items=lazy -Copt-level=1
#![crate_type = "rlib"]
// This test checks that the polymorphization analysis correctly reduces the
// generated mono items.
mod functions {
// Function doesn't have any type parameters to be unused.
pub fn no_parameters() {}
//~ MONO_ITEM fn functions::no_parameters
// Function has an unused type parameter.
pub fn unused<T>() {
}
//~ MONO_ITEM fn functions::unused::<T>
// Function uses type parameter in value of a binding.
pub fn used_binding_value<T: Default>() {
let _: T = Default::default();
}
//~ MONO_ITEM fn functions::used_binding_value::<u32>
//~ MONO_ITEM fn functions::used_binding_value::<u64>
// Function uses type parameter in type of a binding.
pub fn used_binding_type<T>() {
let _: Option<T> = None;
}
//~ MONO_ITEM fn functions::used_binding_type::<u32>
//~ MONO_ITEM fn functions::used_binding_type::<u64>
// Function uses type parameter in argument.
pub fn used_argument<T>(_: T) {
}
//~ MONO_ITEM fn functions::used_argument::<u32>
//~ MONO_ITEM fn functions::used_argument::<u64>
//
// Function uses type parameter in substitutions to another function.
pub fn used_substs<T>() {
unused::<T>()
}
//~ MONO_ITEM fn functions::used_substs::<u32>
//~ MONO_ITEM fn functions::used_substs::<u64>
}
mod closures {
// Function doesn't have any type parameters to be unused.
pub fn no_parameters() {
let _ = || {};
}
//~ MONO_ITEM fn closures::no_parameters
// Function has an unused type parameter in parent and closure.
pub fn unused<T>() -> u32 {
let add_one = |x: u32| x + 1;
add_one(3)
}
//~ MONO_ITEM fn closures::unused::<T>::{closure#0}
//~ MONO_ITEM fn closures::unused::<T>
// Function has an unused type parameter in closure, but not in parent.
pub fn used_parent<T: Default>() -> u32 {
let _: T = Default::default();
let add_one = |x: u32| x + 1;
add_one(3)
}
//~ MONO_ITEM fn closures::used_parent::<T>::{closure#0}
//~ MONO_ITEM fn closures::used_parent::<u32>
//~ MONO_ITEM fn closures::used_parent::<u64>
// Function uses type parameter in value of a binding in closure.
pub fn used_binding_value<T: Default>() -> T {
let x = || {
let y: T = Default::default();
y
};
x()
}
//~ MONO_ITEM fn closures::used_binding_value::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_binding_value::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_binding_value::<u32>
//~ MONO_ITEM fn closures::used_binding_value::<u64>
// Function uses type parameter in type of a binding in closure.
pub fn used_binding_type<T>() -> Option<T> {
let x = || {
let y: Option<T> = None;
y
};
x()
}
//~ MONO_ITEM fn closures::used_binding_type::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_binding_type::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_binding_type::<u32>
//~ MONO_ITEM fn closures::used_binding_type::<u64>
// Function and closure uses type parameter in argument.
pub fn used_argument<T>(t: T) -> u32 {
let x = |_: T| 3;
x(t)
}
//~ MONO_ITEM fn closures::used_argument::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_argument::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_argument::<u32>
//~ MONO_ITEM fn closures::used_argument::<u64>
// Closure uses type parameter in argument.
pub fn used_argument_closure<T: Default>() -> u32 {
let t: T = Default::default();
let x = |_: T| 3;
x(t)
}
//~ MONO_ITEM fn closures::used_argument_closure::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_argument_closure::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_argument_closure::<u32>
//~ MONO_ITEM fn closures::used_argument_closure::<u64>
// Closure uses type parameter as upvar.
pub fn used_upvar<T: Default>() -> T {
let x: T = Default::default();
let y = || x;
y()
}
//~ MONO_ITEM fn closures::used_upvar::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_upvar::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_upvar::<u32>
//~ MONO_ITEM fn closures::used_upvar::<u64>
// Closure uses type parameter in substitutions to another function.
pub fn used_substs<T>() {
let x = || super::functions::unused::<T>();
x()
}
//~ MONO_ITEM fn closures::used_substs::<u32>::{closure#0}
//~ MONO_ITEM fn closures::used_substs::<u64>::{closure#0}
//~ MONO_ITEM fn closures::used_substs::<u32>
//~ MONO_ITEM fn closures::used_substs::<u64>
}
mod methods {
pub struct Foo<F>(F);
impl<F: Default> Foo<F> {
// Function has an unused type parameter from impl.
pub fn unused_impl() {
}
//~ MONO_ITEM fn methods::Foo::<F>::unused_impl
// Function has an unused type parameter from impl and fn.
pub fn unused_both<G: Default>() {
}
//~ MONO_ITEM fn methods::Foo::<F>::unused_both::<G>
// Function uses type parameter from impl.
pub fn used_impl() {
let _: F = Default::default();
}
//~ MONO_ITEM fn methods::Foo::<u32>::used_impl
//~ MONO_ITEM fn methods::Foo::<u64>::used_impl
// Function uses type parameter from impl.
pub fn used_fn<G: Default>() {
let _: G = Default::default();
}
//~ MONO_ITEM fn methods::Foo::<F>::used_fn::<u32>
//~ MONO_ITEM fn methods::Foo::<F>::used_fn::<u64>
// Function uses type parameter from impl.
pub fn used_both<G: Default>() {
let _: F = Default::default();
let _: G = Default::default();
}
//~ MONO_ITEM fn methods::Foo::<u32>::used_both::<u32>
//~ MONO_ITEM fn methods::Foo::<u64>::used_both::<u64>
// Function uses type parameter in substitutions to another function.
pub fn used_substs() {
super::functions::unused::<F>()
}
//~ MONO_ITEM fn methods::Foo::<u32>::used_substs
//~ MONO_ITEM fn methods::Foo::<u64>::used_substs
// Function has an unused type parameter from impl and fn.
pub fn closure_unused_all<G: Default>() -> u32 {
let add_one = |x: u32| x + 1;
add_one(3)
}
//~ MONO_ITEM fn methods::Foo::<F>::closure_unused_all::<G>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<F>::closure_unused_all::<G>
// Function uses type parameter from impl and fn in closure.
pub fn closure_used_both<G: Default>() -> u32 {
let add_one = |x: u32| {
let _: F = Default::default();
let _: G = Default::default();
x + 1
};
add_one(3)
}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_both::<u32>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_both::<u64>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_both::<u32>
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_both::<u64>
// Function uses type parameter from fn in closure.
pub fn closure_used_fn<G: Default>() -> u32 {
let add_one = |x: u32| {
let _: G = Default::default();
x + 1
};
add_one(3)
}
//~ MONO_ITEM fn methods::Foo::<F>::closure_used_fn::<u32>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<F>::closure_used_fn::<u64>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<F>::closure_used_fn::<u32>
//~ MONO_ITEM fn methods::Foo::<F>::closure_used_fn::<u64>
// Function uses type parameter from impl in closure.
pub fn closure_used_impl<G: Default>() -> u32 {
let add_one = |x: u32| {
let _: F = Default::default();
x + 1
};
add_one(3)
}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_impl::<G>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_impl::<G>::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_impl::<G>
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_impl::<G>
// Closure uses type parameter in substitutions to another function.
pub fn closure_used_substs() {
let x = || super::functions::unused::<F>();
x()
}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_substs::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_substs::{closure#0}
//~ MONO_ITEM fn methods::Foo::<u32>::closure_used_substs
//~ MONO_ITEM fn methods::Foo::<u64>::closure_used_substs
}
}
fn dispatch<T: Default>() {
functions::no_parameters();
functions::unused::<T>();
functions::used_binding_value::<T>();
functions::used_binding_type::<T>();
functions::used_argument::<T>(Default::default());
functions::used_substs::<T>();
closures::no_parameters();
let _ = closures::unused::<T>();
let _ = closures::used_parent::<T>();
let _ = closures::used_binding_value::<T>();
let _ = closures::used_binding_type::<T>();
let _ = closures::used_argument::<T>(Default::default());
let _ = closures::used_argument_closure::<T>();
let _ = closures::used_upvar::<T>();
let _ = closures::used_substs::<T>();
methods::Foo::<T>::unused_impl();
methods::Foo::<T>::unused_both::<T>();
methods::Foo::<T>::used_impl();
methods::Foo::<T>::used_fn::<T>();
methods::Foo::<T>::used_both::<T>();
methods::Foo::<T>::used_substs();
let _ = methods::Foo::<T>::closure_unused_all::<T>();
let _ = methods::Foo::<T>::closure_used_both::<T>();
let _ = methods::Foo::<T>::closure_used_impl::<T>();
let _ = methods::Foo::<T>::closure_used_fn::<T>();
let _ = methods::Foo::<T>::closure_used_substs();
}
//~ MONO_ITEM fn dispatch::<u32>
//~ MONO_ITEM fn dispatch::<u64>
pub fn foo() {
// Generate two copies of each function to check that where the type parameter is unused,
// there is only a single copy.
dispatch::<u32>();
dispatch::<u64>();
}
//~ MONO_ITEM fn foo @@ unused_type_parameters-cgu.0[External]
// These are all the items that aren't relevant to the test.
//~ MONO_ITEM fn <u32 as std::default::Default>::default
//~ MONO_ITEM fn <u64 as std::default::Default>::default
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