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26 lines
828 B
Rust
26 lines
828 B
Rust
//! Check that we lose the information that `BAR` points to `FOO`
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//! when going through a const generic.
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//! This is not an intentional guarantee, it just describes the status quo.
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//@ run-pass
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// With optimizations, LLVM will deduplicate the constant `X` whose
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// value is `&42` to just be a reference to the static. This is correct,
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// but obscures the issue we're trying to show.
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//@ revisions: opt noopt
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//@[noopt] compile-flags: -Copt-level=0
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//@[opt] compile-flags: -O
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#![feature(adt_const_params, unsized_const_params)]
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#![allow(incomplete_features)]
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static FOO: usize = 42;
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const BAR: &usize = &FOO;
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fn foo<const X: &'static usize>() {
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// Without optimizations, `X` ends up pointing to a copy of `FOO` instead of `FOO` itself.
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assert_eq!(cfg!(opt), std::ptr::eq(X, &FOO));
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}
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fn main() {
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foo::<BAR>();
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}
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