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