tests/codegen/slice-windows-no-bounds-check.rs

   1 #![crate_type = "lib"]
   2
   3 // compile-flags: -O
   4
   5 use std::slice::Windows;
   6
   7 // CHECK-LABEL: @naive_string_search
   8 #[no_mangle]
   9 pub fn naive_string_search(haystack: &str, needle: &str) -> Option<usize> {
  10     if needle.is_empty() {
  11         return Some(0);
  12     }
  13     // CHECK-NOT: panic
  14     // CHECK-NOT: fail
  15     haystack
  16         .as_bytes()
  17         .windows(needle.len())
  18         .position(|sub| sub == needle.as_bytes())
  19 }
  20
  21 // CHECK-LABEL: @next
  22 #[no_mangle]
  23 pub fn next<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> {
  24     // CHECK-NOT: panic
  25     // CHECK-NOT: fail
  26     w.next()
  27 }
  28
  29 // CHECK-LABEL: @next_back
  30 #[no_mangle]
  31 pub fn next_back<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> {
  32     // CHECK-NOT: panic
  33     // CHECK-NOT: fail
  34     w.next_back()
  35 }