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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/mir-opt/array_index_is_temporary.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/mir-opt/array_index_is_temporary.rs')
-rw-r--r-- | tests/mir-opt/array_index_is_temporary.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tests/mir-opt/array_index_is_temporary.rs b/tests/mir-opt/array_index_is_temporary.rs new file mode 100644 index 000000000..e7bde81d4 --- /dev/null +++ b/tests/mir-opt/array_index_is_temporary.rs @@ -0,0 +1,17 @@ +// Retagging (from Stacked Borrows) relies on the array index being a fresh +// temporary, so that side-effects cannot change it. +// Test that this is indeed the case. + +unsafe fn foo(z: *mut usize) -> u32 { + *z = 2; + 99 +} + + +// EMIT_MIR array_index_is_temporary.main.SimplifyCfg-elaborate-drops.after.mir +fn main() { + let mut x = [42, 43, 44]; + let mut y = 1; + let z: *mut usize = &mut y; + x[y] = unsafe { foo(z) }; +} |