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25 lines
755 B
Rust
25 lines
755 B
Rust
//@ compile-flags: -Copt-level=3 -Ccodegen-units=256 -Clink-arg=-ld_classic
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//@ run-pass
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//@ only-x86_64-apple-darwin
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// This is a regression test for https://github.com/rust-lang/rust/issues/140686.
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// Although this is a ld64(ld-classic) bug, we still need to support it
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// due to cross-compilation and support for older Xcode.
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fn main() {
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let dst: Vec<u8> = Vec::new();
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let len = broken_func(std::hint::black_box(2), dst);
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assert_eq!(len, 8);
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}
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#[inline(never)]
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pub fn broken_func(version: usize, mut dst: Vec<u8>) -> usize {
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match version {
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1 => dst.extend_from_slice(b"aaaaaaaa"),
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2 => dst.extend_from_slice(b"bbbbbbbb"),
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3 => dst.extend_from_slice(b"bbbbbbbb"),
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_ => panic!(),
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}
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dst.len()
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}
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