Use the name "auto traits" everywhere in the compiler

Goodbye, OIBIT!

compiler/rustc_middle/src/mir/mod.rs

@@ -811,7 +811,7 @@ pub struct LocalDecl<'tcx> {
     /// after typeck.
     ///
     /// This should be sound because the drop flags are fully algebraic, and
-    /// therefore don't affect the OIBIT or outlives properties of the
+    /// therefore don't affect the auto-trait or outlives properties of the
     /// generator.
     pub internal: bool,
 

compiler/rustc_middle/src/traits/mod.rs

@@ -70,7 +70,7 @@ pub enum Reveal {
     /// be observable directly by the user, `Reveal::All`
     /// should not be used by checks which may expose
     /// type equality or type contents to the user.
-    /// There are some exceptions, e.g., around OIBITS and
+    /// There are some exceptions, e.g., around auto traits and
     /// transmute-checking, which expose some details, but
     /// not the whole concrete type of the `impl Trait`.
     All,

compiler/rustc_mir_build/src/build/expr/as_rvalue.rs

@@ -96,7 +96,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             ExprKind::Box { value } => {
                 let value = this.hir.mirror(value);
                 // The `Box<T>` temporary created here is not a part of the HIR,
-                // and therefore is not considered during generator OIBIT
+                // and therefore is not considered during generator auto-trait
                 // determination. See the comment about `box` at `yield_in_scope`.
                 let result = this.local_decls.push(LocalDecl::new(expr.ty, expr_span).internal());
                 this.cfg.push(

src/test/rustdoc/auxiliary/rustdoc-impl-parts-crosscrate.rs

@@ -1,3 +1,3 @@
 #![feature(auto_traits)]
 
-pub auto trait AnOibit {}
+pub auto trait AnAutoTrait {}

src/test/rustdoc/impl-parts-crosscrate.rs

@@ -12,9 +12,9 @@ pub struct Bar<T> { t: T }
 // full impl string.  Instead, just make sure something from each part
 // is mentioned.
 
-// @has implementors/rustdoc_impl_parts_crosscrate/trait.AnOibit.js Bar
+// @has implementors/rustdoc_impl_parts_crosscrate/trait.AnAutoTrait.js Bar
 // @has - Send
-// @has - !AnOibit
+// @has - !AnAutoTrait
 // @has - Copy
-impl<T: Send> !rustdoc_impl_parts_crosscrate::AnOibit for Bar<T>
+impl<T: Send> !rustdoc_impl_parts_crosscrate::AnAutoTrait for Bar<T>
     where T: Copy {}

src/test/rustdoc/impl-parts.rs

@@ -1,12 +1,12 @@
 #![feature(negative_impls)]
 #![feature(auto_traits)]
 
-pub auto trait AnOibit {}
+pub auto trait AnAutoTrait {}
 
 pub struct Foo<T> { field: T }
 
 // @has impl_parts/struct.Foo.html '//*[@class="impl"]//code' \
-//     "impl<T: Clone> !AnOibit for Foo<T> where T: Sync,"
-// @has impl_parts/trait.AnOibit.html '//*[@class="item-list"]//code' \
-//     "impl<T: Clone> !AnOibit for Foo<T> where T: Sync,"
-impl<T: Clone> !AnOibit for Foo<T> where T: Sync {}
+//     "impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync,"
+// @has impl_parts/trait.AnAutoTrait.html '//*[@class="item-list"]//code' \
+//     "impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync,"
+impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync {}

src/test/ui/phantom-auto-trait.rs

@@ -1,5 +1,5 @@
-// Ensure that OIBIT checks `T` when it encounters a `PhantomData<T>` field, instead of checking
-// the `PhantomData<T>` type itself (which almost always implements an auto trait)
+// Ensure that auto trait checks `T` when it encounters a `PhantomData<T>` field, instead of
+// checking the `PhantomData<T>` type itself (which almost always implements an auto trait).
 
 #![feature(auto_traits)]
 

src/test/ui/phantom-auto-trait.stderr

@@ -1,5 +1,5 @@
 error[E0277]: `T` cannot be shared between threads safely
-  --> $DIR/phantom-oibit.rs:21:12
+  --> $DIR/phantom-auto-trait.rs:21:12
    |
 LL | fn is_zen<T: Zen>(_: T) {}
    |              --- required by this bound in `is_zen`
@@ -16,7 +16,7 @@ LL | fn not_sync<T: Sync>(x: Guard<T>) {
    |              ^^^^^^
 
 error[E0277]: `T` cannot be shared between threads safely
-  --> $DIR/phantom-oibit.rs:26:12
+  --> $DIR/phantom-auto-trait.rs:26:12
    |
 LL | fn is_zen<T: Zen>(_: T) {}
    |              --- required by this bound in `is_zen`

src/test/ui/traits/traits-inductive-overflow-supertrait-auto-trait.rs

@@ -1,5 +1,5 @@
-// OIBIT-based version of #29859, supertrait version. Test that using
-// a simple OIBIT `..` impl alone still doesn't allow arbitrary bounds
+// Auto-trait-based version of #29859, supertrait version. Test that using
+// a simple auto trait `..` impl alone still doesn't allow arbitrary bounds
 // to be synthesized.
 
 #![feature(auto_traits)]

src/test/ui/traits/traits-inductive-overflow-supertrait-auto-trait.stderr

@@ -1,5 +1,5 @@
 error[E0568]: auto traits cannot have super traits
-  --> $DIR/traits-inductive-overflow-supertrait-oibit.rs:8:19
+  --> $DIR/traits-inductive-overflow-supertrait-auto-trait.rs:8:19
    |
 LL | auto trait Magic: Copy {}
    |            -----  ^^^^ help: remove the super traits
@@ -7,7 +7,7 @@ LL | auto trait Magic: Copy {}
    |            auto trait cannot have super traits
 
 error[E0277]: the trait bound `NoClone: Copy` is not satisfied
-  --> $DIR/traits-inductive-overflow-supertrait-oibit.rs:16:23
+  --> $DIR/traits-inductive-overflow-supertrait-auto-trait.rs:16:23
    |
 LL | fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }
    |            ----- required by this bound in `copy`