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46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
// revisions: noopt opt opt_with_overflow_checks
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//[noopt]compile-flags: -C opt-level=0
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//[opt]compile-flags: -O
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//[opt_with_overflow_checks]compile-flags: -C overflow-checks=on -O
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// build-pass
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const fn assert_static<T>(_: &'static T) {}
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#[allow(unconditional_panic)]
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const fn fail() -> i32 {
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1/0
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}
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const C: i32 = {
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// Promoted that fails to evaluate in dead code -- this must work
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// (for backwards compatibility reasons).
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if false {
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assert_static(&fail());
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}
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42
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};
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fn main() {
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assert_static(&["a", "b", "c"]);
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assert_static(&["d", "e", "f"]);
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assert_eq!(C, 42);
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// make sure that these do not cause trouble despite overflowing
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assert_static(&(0-1));
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assert_static(&-i32::MIN);
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// div-by-non-0 is okay
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assert_static(&(1/1));
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assert_static(&(1%1));
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// in-bounds array access is okay
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assert_static(&([1,2,3][0] + 1));
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assert_static(&[[1,2][1]]);
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// Top-level projections are not part of the promoted, so no error here.
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if false {
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#[allow(unconditional_panic)]
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assert_static(&[1,2,3][4]);
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}
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}
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