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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
//@ unit-test: DeadStoreElimination-final
//@ compile-flags: -Zmir-enable-passes=+CopyProp
#![feature(core_intrinsics)]
#![feature(custom_mir)]
#![allow(internal_features)]
use std::intrinsics::mir::*;
#[inline(never)]
fn use_both(_: i32, _: i32) {}
// EMIT_MIR call_arg_copy.move_simple.DeadStoreElimination-final.diff
fn move_simple(x: i32) {
// CHECK-LABEL: fn move_simple(
// CHECK: = use_both(_1, move _1)
use_both(x, x);
}
#[repr(packed)]
struct Packed {
x: u8,
y: i32,
}
// EMIT_MIR call_arg_copy.move_packed.DeadStoreElimination-final.diff
#[custom_mir(dialect = "analysis")]
fn move_packed(packed: Packed) {
// CHECK-LABEL: fn move_packed(
// CHECK: = use_both(const 0_i32, (_1.1: i32))
mir!(
{
// We have a packed struct, verify that the copy is not turned into a move.
Call(RET = use_both(0, packed.y), ReturnTo(ret), UnwindContinue())
}
ret = {
Return()
}
)
}
fn main() {
move_simple(1);
move_packed(Packed { x: 0, y: 1 });
}
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