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//@ 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,
}
}
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