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18 lines
432 B
Rust
18 lines
432 B
Rust
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// compile-flags: -O
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#![crate_type = "lib"]
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// Ensure that we do not call `memcpy` for the following function.
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// `memset` and `init` should be called directly on the return pointer.
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#[no_mangle]
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pub fn nrvo(init: fn(&mut [u8; 4096])) -> [u8; 4096] {
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// CHECK-LABEL: nrvo
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// CHECK: @llvm.memset
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// CHECK-NOT: @llvm.memcpy
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// CHECK: ret
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// CHECK-EMPTY
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let mut buf = [0; 4096];
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init(&mut buf);
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buf
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}
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