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Rollup merge of rust-lang#52825 - RalfJung:codegen, r=alexcrichton
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Make sure rust-lang#47772 does not regress

Mostly to make my life in rust-lang#52206 harder.^^

Or should I just add that test there?
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Mark-Simulacrum authored Jul 30, 2018
2 parents 6e56dcd + 90165b8 commit 0fa7c12
Showing 1 changed file with 34 additions and 0 deletions.
34 changes: 34 additions & 0 deletions src/test/codegen/slice-position-bounds-check.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// no-system-llvm
// compile-flags: -O
#![crate_type = "lib"]

fn search<T: Ord + Eq>(arr: &mut [T], a: &T) -> Result<usize, ()> {
match arr.iter().position(|x| x == a) {
Some(p) => {
Ok(p)
},
None => Err(()),
}
}

// CHECK-LABEL: @position_no_bounds_check
#[no_mangle]
pub fn position_no_bounds_check(y: &mut [u32], x: &u32, z: &u32) -> bool {
// This contains "call assume" so we cannot just rule out all calls
// CHECK-NOT: panic
if let Ok(p) = search(y, x) {
y[p] == *z
} else {
false
}
}

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