mirror of https://github.com/rust-lang/rust
32 lines
795 B
Rust
32 lines
795 B
Rust
//@ compile-flags: -O -C panic=abort
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#![crate_type = "lib"]
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fn search<T: Ord + Eq>(arr: &mut [T], a: &T) -> Result<usize, ()> {
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match arr.iter().position(|x| x == a) {
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Some(p) => {
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Ok(p)
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},
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None => Err(()),
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}
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}
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// CHECK-LABEL: @position_no_bounds_check
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#[no_mangle]
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pub fn position_no_bounds_check(y: &mut [u32], x: &u32, z: &u32) -> bool {
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// This contains "call assume" so we cannot just rule out all calls
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// CHECK-NOT: panic_bounds_check
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if let Ok(p) = search(y, x) {
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y[p] == *z
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} else {
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false
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}
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}
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// just to make sure that panicking really emits "panic_bounds_check" somewhere in the IR
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// CHECK-LABEL: @test_check
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#[no_mangle]
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pub fn test_check(y: &[i32]) -> i32 {
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// CHECK: panic_bounds_check
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y[12]
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}
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