rust/tests/codegen/enum/enum-bounds-check-issue-13926.rs

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// This test checks an optimization that is not guaranteed to work. This test case should not block
// a future LLVM update.
//@ compile-flags: -O
#![crate_type = "lib"]
#[repr(u8)]
pub enum Exception {
Low = 5,
High = 10,
}
// CHECK-LABEL: @access
#[no_mangle]
pub fn access(array: &[usize; 12], exc: Exception) -> usize {
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// CHECK-NOT: panic_bounds_check
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array[(exc as u8 - 4) as usize]
}