| //@ compile-flags: -Copt-level=3 |
| //@ only-64bit (because we're using [ui]size) |
| |
| #![crate_type = "lib"] |
| #![feature(slice_from_ptr_range)] |
| |
| // This is intentionally using a non-power-of-two array length, |
| // as that's where the optimization differences show up |
| |
| // CHECK-LABEL: @flatten_via_ptr_range |
| #[no_mangle] |
| pub fn flatten_via_ptr_range(slice_of_arrays: &[[i32; 13]]) -> &[i32] { |
| // CHECK-NOT: lshr |
| // CHECK-NOT: udiv |
| // CHECK: mul nuw nsw i64 %{{.+}}, 13 |
| // CHECK-NOT: lshr |
| // CHECK-NOT: udiv |
| let r = slice_of_arrays.as_ptr_range(); |
| let r = r.start.cast()..r.end.cast(); |
| unsafe { core::slice::from_ptr_range(r) } |
| } |
