mirror of https://github.com/rust-lang/rust
29 lines
520 B
Rust
29 lines
520 B
Rust
#![feature(core_intrinsics, rustc_attrs)]
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use std::intrinsics::rustc_peek;
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#[rustc_mir(rustc_peek_liveness, stop_after_dataflow)]
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fn foo() -> i32 {
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let mut x: i32;
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let mut p: *const i32;
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x = 0;
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// `x` is live here since it is used in the next statement...
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rustc_peek(x);
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p = &x;
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// ... but not here, even while it can be accessed through `p`.
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rustc_peek(x); //~ ERROR rustc_peek: bit not set
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let tmp = unsafe { *p };
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x = tmp + 1;
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rustc_peek(x);
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x
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}
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fn main() {}
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