mirror of https://github.com/rust-lang/rust
23 lines
661 B
Rust
23 lines
661 B
Rust
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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//! Copy of `nrvo-simple.rs`, to ensure that full dest-prop handles it too.
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//@ test-mir-pass: DestinationPropagation
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// EMIT_MIR simple.nrvo.DestinationPropagation.diff
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fn nrvo(init: fn(&mut [u8; 1024])) -> [u8; 1024] {
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// CHECK-LABEL: fn nrvo(
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// CHECK: debug init => [[init:_.*]];
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// CHECK: debug buf => [[buf:_.*]];
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// CHECK: [[buf]] = [const 0_u8; 1024];
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// CHECK-NOT: {{_.*}} = copy [[init]];
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// CHECK: move [[init]](move {{_.*}})
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// CHECK: {{_.*}} = copy [[buf]]
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let mut buf = [0; 1024];
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init(&mut buf);
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buf
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}
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fn main() {
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let _ = nrvo(|buf| {
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buf[4] = 4;
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});
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}
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