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