tests/codegen-units/item-collection/generic-drop-glue.rs

   1 //
   2 // compile-flags:-Zprint-mono-items=eager
   3 // compile-flags:-Zinline-in-all-cgus
   4
   5 #![deny(dead_code)]
   6 #![feature(start)]
   7
   8 struct StructWithDrop<T1, T2> {
   9     x: T1,
  10     y: T2,
  11 }
  12
  13 impl<T1, T2> Drop for StructWithDrop<T1, T2> {
  14     fn drop(&mut self) {}
  15 }
  16
  17 struct StructNoDrop<T1, T2> {
  18     x: T1,
  19     y: T2,
  20 }
  21
  22 enum EnumWithDrop<T1, T2> {
  23     A(T1),
  24     B(T2)
  25 }
  26
  27 impl<T1, T2> Drop for EnumWithDrop<T1, T2> {
  28     fn drop(&mut self) {}
  29 }
  30
  31 enum EnumNoDrop<T1, T2> {
  32     A(T1),
  33     B(T2)
  34 }
  35
  36
  37 struct NonGenericNoDrop(#[allow(unused_tuple_struct_fields)] i32);
  38
  39 struct NonGenericWithDrop(#[allow(unused_tuple_struct_fields)] i32);
  40 //~ MONO_ITEM fn std::ptr::drop_in_place::<NonGenericWithDrop> - shim(Some(NonGenericWithDrop)) @@ generic_drop_glue-cgu.0[Internal]
  41
  42 impl Drop for NonGenericWithDrop {
  43     //~ MONO_ITEM fn <NonGenericWithDrop as std::ops::Drop>::drop
  44     fn drop(&mut self) {}
  45 }
  46
  47 //~ MONO_ITEM fn start
  48 #[start]
  49 fn start(_: isize, _: *const *const u8) -> isize {
  50     //~ MONO_ITEM fn std::ptr::drop_in_place::<StructWithDrop<i8, char>> - shim(Some(StructWithDrop<i8, char>)) @@ generic_drop_glue-cgu.0[Internal]
  51     //~ MONO_ITEM fn <StructWithDrop<i8, char> as std::ops::Drop>::drop
  52     let _ = StructWithDrop { x: 0i8, y: 'a' }.x;
  53
  54     //~ MONO_ITEM fn std::ptr::drop_in_place::<StructWithDrop<&str, NonGenericNoDrop>> - shim(Some(StructWithDrop<&str, NonGenericNoDrop>)) @@ generic_drop_glue-cgu.0[Internal]
  55     //~ MONO_ITEM fn <StructWithDrop<&str, NonGenericNoDrop> as std::ops::Drop>::drop
  56     let _ = StructWithDrop { x: "&str", y: NonGenericNoDrop(0) }.y;
  57
  58     // Should produce no drop glue
  59     let _ = StructNoDrop { x: 'a', y: 0u32 }.x;
  60
  61     // This is supposed to generate drop-glue because it contains a field that
  62     // needs to be dropped.
  63     //~ MONO_ITEM fn std::ptr::drop_in_place::<StructNoDrop<NonGenericWithDrop, f64>> - shim(Some(StructNoDrop<NonGenericWithDrop, f64>)) @@ generic_drop_glue-cgu.0[Internal]
  64     let _ = StructNoDrop { x: NonGenericWithDrop(0), y: 0f64 }.y;
  65
  66     //~ MONO_ITEM fn std::ptr::drop_in_place::<EnumWithDrop<i32, i64>> - shim(Some(EnumWithDrop<i32, i64>)) @@ generic_drop_glue-cgu.0[Internal]
  67     //~ MONO_ITEM fn <EnumWithDrop<i32, i64> as std::ops::Drop>::drop
  68     let _ = match EnumWithDrop::A::<i32, i64>(0) {
  69         EnumWithDrop::A(x) => x,
  70         EnumWithDrop::B(x) => x as i32
  71     };
  72
  73     //~ MONO_ITEM fn std::ptr::drop_in_place::<EnumWithDrop<f64, f32>> - shim(Some(EnumWithDrop<f64, f32>)) @@ generic_drop_glue-cgu.0[Internal]
  74     //~ MONO_ITEM fn <EnumWithDrop<f64, f32> as std::ops::Drop>::drop
  75     let _ = match EnumWithDrop::B::<f64, f32>(1.0) {
  76         EnumWithDrop::A(x) => x,
  77         EnumWithDrop::B(x) => x as f64
  78     };
  79
  80     let _ = match EnumNoDrop::A::<i32, i64>(0) {
  81         EnumNoDrop::A(x) => x,
  82         EnumNoDrop::B(x) => x as i32
  83     };
  84
  85     let _ = match EnumNoDrop::B::<f64, f32>(1.0) {
  86         EnumNoDrop::A(x) => x,
  87         EnumNoDrop::B(x) => x as f64
  88     };
  89
  90     0
  91 }