diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/mir-dataflow/uninits-2.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/mir-dataflow/uninits-2.rs')
-rw-r--r-- | src/test/ui/mir-dataflow/uninits-2.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/mir-dataflow/uninits-2.rs b/src/test/ui/mir-dataflow/uninits-2.rs new file mode 100644 index 000000000..c584ee74a --- /dev/null +++ b/src/test/ui/mir-dataflow/uninits-2.rs @@ -0,0 +1,24 @@ +// General test of maybe_uninits state computed by MIR dataflow. + +#![feature(core_intrinsics, rustc_attrs)] + +use std::intrinsics::rustc_peek; +use std::mem::{drop, replace}; + +struct S(i32); + +#[rustc_mir(rustc_peek_maybe_uninit,stop_after_dataflow)] +fn foo(x: &mut S) { + // `x` is initialized here, so maybe-uninit bit is 0. + + rustc_peek(&x); //~ ERROR rustc_peek: bit not set + + ::std::mem::drop(x); + + // `x` definitely uninitialized here, so maybe-uninit bit is 1. + rustc_peek(&x); +} +fn main() { + foo(&mut S(13)); + foo(&mut S(13)); +} |