[rustc.git] / tests / codegen / enum-bounds-check-issue-82871.rs

// compile-flags: -C opt-level=0

#![crate_type = "lib"]

#[repr(C)]
pub enum E {
    A,
}

// CHECK-LABEL: @index
#[no_mangle]
pub fn index(x: &[u32; 3], ind: E) -> u32 {
    // Canary: we should be able to optimize out the bounds check, but we need
    // to track the range of the discriminant result in order to be able to do that.
    // oli-obk tried to add that, but that caused miscompilations all over the place.
    // CHECK: panic_bounds_check
    x[ind as usize]
}
Commit	Line	Data
064997fb	1	// compile-flags: -C opt-level=0
6a06907d XL	2
	3	#![crate_type = "lib"]
	4
	5	#[repr(C)]
	6	pub enum E {
	7	A,
	8	}
	9
	10	// CHECK-LABEL: @index
	11	#[no_mangle]
064997fb FG	12	pub fn index(x: &[u32; 3], ind: E) -> u32 {
	13	// Canary: we should be able to optimize out the bounds check, but we need
	14	// to track the range of the discriminant result in order to be able to do that.
	15	// oli-obk tried to add that, but that caused miscompilations all over the place.
	16	// CHECK: panic_bounds_check
6a06907d XL	17	x[ind as usize]
6a06907d XL	18	}