| //@ compile-flags: -O | |
| #![crate_type = "lib"] | |
| // There should be no calls to panic / len_mismatch_fail. | |
| #[no_mangle] | |
| pub fn test(a: &mut [u8], offset: usize, bytes: &[u8]) { | |
| // CHECK-LABEL: @test( | |
| // CHECK-NOT: call | |
| // CHECK: call void @llvm.memcpy | |
| // CHECK-NOT: call | |
| // CHECK: } | |
| if let Some(dst) = a.get_mut(offset..offset + bytes.len()) { | |
| dst.copy_from_slice(bytes); | |
| } | |
| } |