File: enum-bounds-check.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb11u3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,245,360 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (26 lines) | stat: -rw-r--r-- 418 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
//@ compile-flags: -O

#![crate_type = "lib"]

pub enum Foo {
    A, B
}

// CHECK-LABEL: @lookup
#[no_mangle]
pub fn lookup(buf: &[u8; 2], f: Foo) -> u8 {
    // CHECK-NOT: panic_bounds_check
    buf[f as usize]
}

pub enum Bar {
    A = 2,
    B = 3
}

// CHECK-LABEL: @lookup_unmodified
#[no_mangle]
pub fn lookup_unmodified(buf: &[u8; 5], f: Bar) -> u8 {
    // CHECK-NOT: panic_bounds_check
    buf[f as usize]
}