19 lines
416 B
Rust
19 lines
416 B
Rust
// EMIT_MIR issue_75439.foo.MatchBranchSimplification.diff
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use std::mem::transmute;
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pub fn foo(bytes: [u8; 16]) -> Option<[u8; 4]> {
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// big endian `u32`s
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let dwords: [u32; 4] = unsafe { transmute(bytes) };
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const FF: u32 = 0x0000_ffff_u32.to_be();
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if let [0, 0, 0 | FF, ip] = dwords {
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Some(unsafe { transmute(ip) })
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} else {
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None
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}
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}
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fn main() {
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let _ = foo([0; 16]);
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}
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