Update bootstrap compiler

This commit updates the bootstrap compiler and clears out a number
of #[cfg(stage0)] annotations and related business

Author: alexcrichton

src/bootstrap/lib.rs

@@ -123,7 +123,6 @@ extern crate build_helper;
 extern crate serde_derive;
 #[macro_use]
 extern crate lazy_static;
-extern crate serde;
 extern crate serde_json;
 extern crate cmake;
 extern crate filetime;

src/libcore/array.rs

@@ -123,14 +123,6 @@ macro_rules! array_impls {
                 }
             }
 
-            #[stable(feature = "rust1", since = "1.0.0")]
-            #[cfg(stage0)]
-            impl<T:Copy> Clone for [T; $N] {
-                fn clone(&self) -> [T; $N] {
-                    *self
-                }
-            }
-
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<T: Hash> Hash for [T; $N] {
                 fn hash<H: hash::Hasher>(&self, state: &mut H) {

src/libcore/clone.rs

@@ -88,7 +88,7 @@
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(stage0), lang = "clone")]
+#[lang = "clone"]
 pub trait Clone : Sized {
     /// Returns a copy of the value.
     ///
@@ -130,45 +130,3 @@ pub struct AssertParamIsClone<T: Clone + ?Sized> { _field: ::marker::PhantomData
            reason = "deriving hack, should not be public",
            issue = "0")]
 pub struct AssertParamIsCopy<T: Copy + ?Sized> { _field: ::marker::PhantomData<T> }
-
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-impl<'a, T: ?Sized> Clone for &'a T {
-    /// Returns a shallow copy of the reference.
-    #[inline]
-    fn clone(&self) -> &'a T { *self }
-}
-
-macro_rules! clone_impl {
-    ($t:ty) => {
-        #[stable(feature = "rust1", since = "1.0.0")]
-        #[cfg(stage0)]
-        impl Clone for $t {
-            /// Returns a deep copy of the value.
-            #[inline]
-            fn clone(&self) -> $t { *self }
-        }
-    }
-}
-
-clone_impl! { isize }
-clone_impl! { i8 }
-clone_impl! { i16 }
-clone_impl! { i32 }
-clone_impl! { i64 }
-clone_impl! { i128 }
-
-clone_impl! { usize }
-clone_impl! { u8 }
-clone_impl! { u16 }
-clone_impl! { u32 }
-clone_impl! { u64 }
-clone_impl! { u128 }
-
-clone_impl! { f32 }
-clone_impl! { f64 }
-
-clone_impl! { ! }
-clone_impl! { () }
-clone_impl! { bool }
-clone_impl! { char }

src/libcore/macros.rs

@@ -8,16 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#[macro_export]
-// This stability attribute is totally useless.
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-macro_rules! __rust_unstable_column {
-    () => {
-        column!()
-    }
-}
-
 /// Entry point of thread panic, for details, see std::macros
 #[macro_export]
 #[allow_internal_unstable]

src/libcore/mem.rs

@@ -188,26 +188,6 @@ pub fn forget<T>(t: T) {
 /// ```
 #[inline]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-pub fn size_of<T>() -> usize {
-    unsafe { intrinsics::size_of::<T>() }
-}
-
-/// Returns the size of a type in bytes.
-///
-/// More specifically, this is the offset in bytes between successive
-/// items of the same type, including alignment padding.
-///
-/// # Examples
-///
-/// ```
-/// use std::mem;
-///
-/// assert_eq!(4, mem::size_of::<i32>());
-/// ```
-#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(not(stage0))]
 pub const fn size_of<T>() -> usize {
     unsafe { intrinsics::size_of::<T>() }
 }
@@ -299,29 +279,6 @@ pub fn min_align_of_val<T: ?Sized>(val: &T) -> usize {
 /// ```
 #[inline]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-pub fn align_of<T>() -> usize {
-    unsafe { intrinsics::min_align_of::<T>() }
-}
-
-/// Returns the [ABI]-required minimum alignment of a type.
-///
-/// Every reference to a value of the type `T` must be a multiple of this number.
-///
-/// This is the alignment used for struct fields. It may be smaller than the preferred alignment.
-///
-/// [ABI]: https://en.wikipedia.org/wiki/Application_binary_interface
-///
-/// # Examples
-///
-/// ```
-/// use std::mem;
-///
-/// assert_eq!(4, mem::align_of::<i32>());
-/// ```
-#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(not(stage0))]
 pub const fn align_of<T>() -> usize {
     unsafe { intrinsics::min_align_of::<T>() }
 }

src/libcore/num/f32.rs

@@ -10,8 +10,6 @@
 
 //! Operations and constants for 32-bits floats (`f32` type)
 
-#![cfg_attr(stage0, allow(overflowing_literals))]
-
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use intrinsics;

src/libcore/ptr.rs

@@ -875,36 +875,9 @@ pub fn eq<T: ?Sized>(a: *const T, b: *const T) -> bool {
     a == b
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-impl<T: ?Sized> Clone for *const T {
-    #[inline]
-    fn clone(&self) -> *const T {
-        *self
-    }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-impl<T: ?Sized> Clone for *mut T {
-    #[inline]
-    fn clone(&self) -> *mut T {
-        *self
-    }
-}
-
 // Impls for function pointers
 macro_rules! fnptr_impls_safety_abi {
     ($FnTy: ty, $($Arg: ident),*) => {
-        #[stable(feature = "rust1", since = "1.0.0")]
-        #[cfg(stage0)]
-        impl<Ret, $($Arg),*> Clone for $FnTy {
-            #[inline]
-            fn clone(&self) -> Self {
-                *self
-            }
-        }
-
         #[stable(feature = "fnptr_impls", since = "1.4.0")]
         impl<Ret, $($Arg),*> PartialEq for $FnTy {
             #[inline]

src/libcore/tuple.rs

@@ -21,14 +21,6 @@ macro_rules! tuple_impls {
         }
     )+) => {
         $(
-            #[stable(feature = "rust1", since = "1.0.0")]
-            #[cfg(stage0)]
-            impl<$($T:Clone),+> Clone for ($($T,)+) {
-                fn clone(&self) -> ($($T,)+) {
-                    ($(self.$idx.clone(),)+)
-                }
-            }
-
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<$($T:PartialEq),+> PartialEq for ($($T,)+) where last_type!($($T,)+): ?Sized {
                 #[inline]

src/libstd/macros.rs

@@ -14,16 +14,6 @@
 //! library. Each macro is available for use when linking against the standard
 //! library.
 
-#[macro_export]
-// This stability attribute is totally useless.
-#[stable(feature = "rust1", since = "1.0.0")]
-#[cfg(stage0)]
-macro_rules! __rust_unstable_column {
-    () => {
-        column!()
-    }
-}
-
 /// The entry point for panic of Rust threads.
 ///
 /// This macro is used to inject panic into a Rust thread, causing the thread to

src/libstd/panicking.rs

@@ -522,40 +522,6 @@ pub fn begin_panic_fmt(msg: &fmt::Arguments,
     begin_panic(s, file_line_col)
 }
 
-// FIXME: In PR #42938, we have added the column as info passed to the panic
-// handling code. For this, we want to break the ABI of begin_panic.
-// This is not possible to do directly, as the stage0 compiler is hardcoded
-// to emit a call to begin_panic in src/libsyntax/ext/build.rs, only
-// with the file and line number being passed, but not the colum number.
-// By changing the compiler source, we can only affect behaviour of higher
-// stages. We need to perform the switch over two stage0 replacements, using
-// a temporary function begin_panic_new while performing the switch:
-// 0. Before the current switch, we told stage1 onward to emit a call
-//    to begin_panic_new.
-// 1. Right now, stage0 calls begin_panic_new with the new ABI,
-//    begin_panic stops being used. We have changed begin_panic to
-//    the new ABI, and started to emit calls to begin_panic in higher
-//    stages again, this time with the new ABI.
-// 2. After the second SNAP, stage0 calls begin_panic with the new ABI,
-//    and we can remove the temporary begin_panic_new function.
-
-/// This is the entry point of panicking for panic!() and assert!().
-#[cfg(stage0)]
-#[unstable(feature = "libstd_sys_internals",
-           reason = "used by the panic! macro",
-           issue = "0")]
-#[inline(never)] #[cold] // avoid code bloat at the call sites as much as possible
-pub fn begin_panic_new<M: Any + Send>(msg: M, file_line_col: &(&'static str, u32, u32)) -> ! {
-    // Note that this should be the only allocation performed in this code path.
-    // Currently this means that panic!() on OOM will invoke this code path,
-    // but then again we're not really ready for panic on OOM anyway. If
-    // we do start doing this, then we should propagate this allocation to
-    // be performed in the parent of this thread instead of the thread that's
-    // panicking.
-
-    rust_panic_with_hook(Box::new(msg), file_line_col)
-}
-
 /// This is the entry point of panicking for panic!() and assert!().
 #[unstable(feature = "libstd_sys_internals",
            reason = "used by the panic! macro",