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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-54462-mutable-noalias-correctness.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-54462-mutable-noalias-correctness.rs b/src/test/ui/issues/issue-54462-mutable-noalias-correctness.rs new file mode 100644 index 000000000..412028bdc --- /dev/null +++ b/src/test/ui/issues/issue-54462-mutable-noalias-correctness.rs @@ -0,0 +1,25 @@ +// run-pass +// +// compile-flags: -Ccodegen-units=1 -O + +fn linidx(row: usize, col: usize) -> usize { + row * 1 + col * 3 +} + +fn main() { + let mut mat = [1.0f32, 5.0, 9.0, 2.0, 6.0, 10.0, 3.0, 7.0, 11.0, 4.0, 8.0, 12.0]; + + for i in 0..2 { + for j in i+1..3 { + if mat[linidx(j, 3)] > mat[linidx(i, 3)] { + for k in 0..4 { + let (x, rest) = mat.split_at_mut(linidx(i, k) + 1); + let a = x.last_mut().unwrap(); + let b = rest.get_mut(linidx(j, k) - linidx(i, k) - 1).unwrap(); + ::std::mem::swap(a, b); + } + } + } + } + assert_eq!([9.0, 5.0, 1.0, 10.0, 6.0, 2.0, 11.0, 7.0, 3.0, 12.0, 8.0, 4.0], mat); +} |