| //@ compile-flags: -O |
| |
| #![crate_type = "lib"] |
| #![feature(core_intrinsics)] |
| |
| // Tests that codegen works properly when enums like `Result<usize, Box<()>>` |
| // are represented as `{ u64, ptr }`, i.e., for `Ok(123)`, `123` is stored |
| // as a pointer. |
| |
| // CHECK-LABEL: @insert_int |
| #[no_mangle] |
| pub fn insert_int(x: usize) -> Result<usize, Box<()>> { |
| // CHECK: start: |
| // CHECK-NEXT: inttoptr i{{[0-9]+}} %x to ptr |
| // CHECK-NEXT: insertvalue |
| // CHECK-NEXT: ret { i{{[0-9]+}}, ptr } |
| Ok(x) |
| } |
| |
| // CHECK-LABEL: @insert_box |
| #[no_mangle] |
| pub fn insert_box(x: Box<()>) -> Result<usize, Box<()>> { |
| // CHECK: start: |
| // CHECK-NEXT: insertvalue { i{{[0-9]+}}, ptr } |
| // CHECK-NEXT: ret |
| Err(x) |
| } |
| |
| // CHECK-LABEL: @extract_int |
| // CHECK-NOT: nonnull |
| // CHECK-SAME: (i{{[0-9]+}} {{[^,]+}} [[DISCRIMINANT:%[0-9]+]], ptr {{[^,]+}} [[PAYLOAD:%[0-9]+]]) |
| #[no_mangle] |
| pub unsafe fn extract_int(x: Result<usize, Box<()>>) -> usize { |
| // CHECK: [[TEMP:%.+]] = ptrtoint ptr [[PAYLOAD]] to [[USIZE:i[0-9]+]] |
| // CHECK: ret [[USIZE]] [[TEMP]] |
| match x { |
| Ok(v) => v, |
| Err(_) => std::intrinsics::unreachable(), |
| } |
| } |
| |
| // CHECK-LABEL: @extract_box |
| // CHECK-SAME: (i{{[0-9]+}} {{[^,]+}} [[DISCRIMINANT:%[0-9]+]], ptr {{[^,]+}} [[PAYLOAD:%[0-9]+]]) |
| #[no_mangle] |
| pub unsafe fn extract_box(x: Result<usize, Box<i32>>) -> Box<i32> { |
| // CHECK: ret ptr [[PAYLOAD]] |
| match x { |
| Ok(_) => std::intrinsics::unreachable(), |
| Err(e) => e, |
| } |
| } |