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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/mir-dataflow/liveness-ptr.rs
parentInitial commit. (diff)
downloadrustc-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/liveness-ptr.rs')
-rw-r--r--src/test/ui/mir-dataflow/liveness-ptr.rs28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/mir-dataflow/liveness-ptr.rs b/src/test/ui/mir-dataflow/liveness-ptr.rs
new file mode 100644
index 000000000..786da523a
--- /dev/null
+++ b/src/test/ui/mir-dataflow/liveness-ptr.rs
@@ -0,0 +1,28 @@
+#![feature(core_intrinsics, rustc_attrs)]
+
+use std::intrinsics::rustc_peek;
+
+#[rustc_mir(rustc_peek_liveness, stop_after_dataflow)]
+fn foo() -> i32 {
+ let mut x: i32;
+ let mut p: *const i32;
+
+ x = 0;
+
+ // `x` is live here since it is used in the next statement...
+ rustc_peek(x);
+
+ p = &x;
+
+ // ... but not here, even while it can be accessed through `p`.
+ rustc_peek(x); //~ ERROR rustc_peek: bit not set
+ let tmp = unsafe { *p };
+
+ x = tmp + 1;
+
+ rustc_peek(x);
+
+ x
+}
+
+fn main() {}