rust/tests/mir-opt/copy-prop/move_projection.rs

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// skip-filecheck
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
// unit-test: CopyProp
#![feature(custom_mir, core_intrinsics)]
#![allow(unused_assignments)]
extern crate core;
use core::intrinsics::mir::*;
fn opaque(_: impl Sized) -> bool { true }
struct Foo(u8);
#[custom_mir(dialect = "analysis", phase = "post-cleanup")]
fn f(a: Foo) -> bool {
mir!(
{
let b = a;
// This is a move out of a copy, so must become a copy of `a.0`.
let c = Move(b.0);
Call(RET = opaque(Move(a)), bb1, UnwindContinue())
}
bb1 = {
Call(RET = opaque(Move(c)), ret, UnwindContinue())
}
ret = {
Return()
}
)
}
fn main() {
assert!(f(Foo(0)));
}
// EMIT_MIR move_projection.f.CopyProp.diff