rust/tests/codegen/slice-indexing.rs

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// compile-flags: -O
// only-64bit (because the LLVM type of i64 for usize shows up)
// ignore-debug: the debug assertions get in the way
#![crate_type = "lib"]
use std::ops::Range;
// CHECK-LABEL: @index_by_range(
#[no_mangle]
pub fn index_by_range(x: &[u16], r: Range<usize>) -> &[u16] {
// CHECK: sub nuw i64
&x[r]
}
// CHECK-LABEL: @get_unchecked_by_range(
#[no_mangle]
pub unsafe fn get_unchecked_by_range(x: &[u16], r: Range<usize>) -> &[u16] {
// CHECK: sub nuw i64
x.get_unchecked(r)
}
// CHECK-LABEL: @index_mut_by_range(
#[no_mangle]
pub fn index_mut_by_range(x: &mut [i32], r: Range<usize>) -> &mut [i32] {
// CHECK: sub nuw i64
&mut x[r]
}
// CHECK-LABEL: @get_unchecked_mut_by_range(
#[no_mangle]
pub unsafe fn get_unchecked_mut_by_range(x: &mut [i32], r: Range<usize>) -> &mut [i32] {
// CHECK: sub nuw i64
x.get_unchecked_mut(r)
}