//@ compile-flags: -O #![crate_type = "lib"] // Adapted from #[derive(Clone, Copy)] #[repr(u8)] pub enum Foo { A, B, C, D, } // CHECK-LABEL: @issue_73258( #[no_mangle] pub unsafe fn issue_73258(ptr: *const Foo) -> Foo { // CHECK-NOT: icmp // CHECK-NOT: call // CHECK-NOT: br // CHECK-NOT: select // CHECK: %[[R:.+]] = load i8 // CHECK-SAME: !range ! // CHECK-NOT: icmp // CHECK-NOT: call // CHECK-NOT: br // CHECK-NOT: select // CHECK: ret i8 %[[R]] // CHECK-NOT: icmp // CHECK-NOT: call // CHECK-NOT: br // CHECK-NOT: select let k: Option = Some(ptr.read()); return k.unwrap(); }