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6885733c41
The test cases src/test/mir-opt/building/custom/consts.rs and src/test/mir-opt/const_prop/mutable_variable_no_prop.rs are currently failing on big-endian platforms as the binary encoding of some constants is hard-coded in the MIR test files. Fix this by choosing constant values that have the same encoding on big- and little-endian platforms. The test case src/test/mir-opt/issues/issue_75439.rs is failing as well, but since the purpose of the test is to validate handling of big-endian integer encodings on a little-endian platform, it does not make much sense to run it on big-endian platforms in the first place - we can just ignore it there. Fixed part of https://github.com/rust-lang/rust/issues/105383.
20 lines
437 B
Rust
20 lines
437 B
Rust
// EMIT_MIR issue_75439.foo.MatchBranchSimplification.diff
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// ignore-endian-big
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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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