Step bootstrap cfgs

Author: Mark-Simulacrum

compiler/rustc_ast/src/lib.rs

@@ -11,7 +11,6 @@
 #![doc(rust_logo)]
 #![allow(internal_features)]
 #![feature(rustdoc_internals)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(associated_type_defaults)]
 #![feature(box_patterns)]
 #![feature(if_let_guard)]

compiler/rustc_borrowck/src/lib.rs

@@ -4,7 +4,6 @@
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(let_chains)]

compiler/rustc_codegen_gcc/example/mini_core.rs

@@ -420,7 +420,6 @@ pub fn panic(_msg: &'static str) -> ! {
 
 macro_rules! panic_const {
     ($($lang:ident = $message:expr,)+) => {
-        #[cfg(not(bootstrap))]
         pub mod panic_const {
             use super::*;
 

compiler/rustc_codegen_ssa/src/lib.rs

@@ -4,7 +4,6 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(box_patterns)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]

compiler/rustc_expand/src/lib.rs

@@ -1,7 +1,6 @@
 #![doc(rust_logo)]
 #![feature(rustdoc_internals)]
 #![feature(array_windows)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(associated_type_defaults)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]

compiler/rustc_infer/src/lib.rs

@@ -18,7 +18,6 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(extend_one)]

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1261,7 +1261,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
         sess: &'a Session,
     ) -> impl Iterator<Item = ModChild> + 'a {
         iter::from_coroutine(
-            #[cfg_attr(not(bootstrap), coroutine)]
+            #[coroutine]
             move || {
                 if let Some(data) = &self.root.proc_macro_data {
                     // If we are loading as a proc macro, we want to return

compiler/rustc_middle/src/lib.rs

@@ -37,7 +37,6 @@
 #![feature(coroutines)]
 #![feature(stmt_expr_attributes)]
 #![feature(if_let_guard)]
-#![cfg_attr(bootstrap, feature(inline_const))]
 #![feature(iter_from_coroutine)]
 #![feature(negative_impls)]
 #![feature(never_type)]
@@ -48,7 +47,6 @@
 #![feature(trusted_len)]
 #![feature(type_alias_impl_trait)]
 #![feature(strict_provenance)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(rustc_attrs)]
 #![feature(control_flow_enum)]
 #![feature(trait_upcasting)]

compiler/rustc_middle/src/ty/closure.rs

@@ -424,7 +424,7 @@ pub fn analyze_coroutine_closure_captures<'a, 'tcx: 'a, T>(
     mut for_each: impl FnMut((usize, &'a CapturedPlace<'tcx>), (usize, &'a CapturedPlace<'tcx>)) -> T,
 ) -> impl Iterator<Item = T> + Captures<'a> + Captures<'tcx> {
     std::iter::from_coroutine(
-        #[cfg_attr(not(bootstrap), coroutine)]
+        #[coroutine]
         move || {
             let mut child_captures = child_captures.into_iter().enumerate().peekable();
 

compiler/rustc_middle/src/ty/context.rs

@@ -1285,7 +1285,7 @@ impl<'tcx> TyCtxt<'tcx> {
 
         let definitions = &self.untracked.definitions;
         std::iter::from_coroutine(
-            #[cfg_attr(not(bootstrap), coroutine)]
+            #[coroutine]
             || {
                 let mut i = 0;
 

compiler/rustc_mir_build/src/lib.rs

@@ -5,7 +5,6 @@
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
 #![feature(assert_matches)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(box_patterns)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]

compiler/rustc_mir_transform/src/lib.rs

@@ -4,7 +4,6 @@
 #![feature(cow_is_borrowed)]
 #![feature(decl_macro)]
 #![feature(impl_trait_in_assoc_type)]
-#![cfg_attr(bootstrap, feature(inline_const))]
 #![feature(is_sorted)]
 #![feature(let_chains)]
 #![feature(map_try_insert)]

compiler/rustc_serialize/src/lib.rs

@@ -8,10 +8,8 @@
 #![doc(rust_logo)]
 #![allow(internal_features)]
 #![feature(rustdoc_internals)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(const_option)]
 #![feature(core_intrinsics)]
-#![cfg_attr(bootstrap, feature(inline_const))]
 #![feature(min_specialization)]
 #![feature(never_type)]
 #![feature(ptr_sub_ptr)]

compiler/rustc_trait_selection/src/lib.rs

@@ -17,7 +17,6 @@
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
 #![feature(assert_matches)]
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(associated_type_defaults)]
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]

library/alloc/src/lib.rs

@@ -165,9 +165,6 @@
 //
 // Language features:
 // tidy-alphabetical-start
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
-#![cfg_attr(bootstrap, feature(inline_const))]
-#![cfg_attr(not(bootstrap), rustc_preserve_ub_checks)]
 #![cfg_attr(not(test), feature(coroutine_trait))]
 #![cfg_attr(test, feature(panic_update_hook))]
 #![cfg_attr(test, feature(test))]
@@ -198,6 +195,7 @@
 #![feature(unboxed_closures)]
 #![feature(unsized_fn_params)]
 #![feature(with_negative_coherence)]
+#![rustc_preserve_ub_checks]
 // tidy-alphabetical-end
 //
 // Rustdoc features:

library/alloc/tests/lib.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(allocator_api)]
 #![feature(alloc_layout_extra)]
 #![feature(iter_array_chunks)]

library/core/src/cmp.rs

@@ -379,7 +379,7 @@ pub struct AssertParamIsEq<T: Eq + ?Sized> {
 // This is a lang item only so that `BinOp::Cmp` in MIR can return it.
 // It has no special behaviour, but does require that the three variants
 // `Less`/`Equal`/`Greater` remain `-1_i8`/`0_i8`/`+1_i8` respectively.
-#[cfg_attr(not(bootstrap), lang = "Ordering")]
+#[lang = "Ordering"]
 #[repr(i8)]
 pub enum Ordering {
     /// An ordering where a compared value is less than another.
@@ -852,7 +852,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
     #[stable(feature = "ord_max_min", since = "1.21.0")]
     #[inline]
     #[must_use]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_ord_max")]
+    #[rustc_diagnostic_item = "cmp_ord_max"]
     fn max(self, other: Self) -> Self
     where
         Self: Sized,
@@ -873,7 +873,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
     #[stable(feature = "ord_max_min", since = "1.21.0")]
     #[inline]
     #[must_use]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_ord_min")]
+    #[rustc_diagnostic_item = "cmp_ord_min"]
     fn min(self, other: Self) -> Self
     where
         Self: Sized,
@@ -1160,7 +1160,7 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_partialord_cmp")]
+    #[rustc_diagnostic_item = "cmp_partialord_cmp"]
     fn partial_cmp(&self, other: &Rhs) -> Option<Ordering>;
 
     /// This method tests less than (for `self` and `other`) and is used by the `<` operator.
@@ -1175,7 +1175,7 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     #[inline]
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_partialord_lt")]
+    #[rustc_diagnostic_item = "cmp_partialord_lt"]
     fn lt(&self, other: &Rhs) -> bool {
         matches!(self.partial_cmp(other), Some(Less))
     }
@@ -1193,7 +1193,7 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     #[inline]
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_partialord_le")]
+    #[rustc_diagnostic_item = "cmp_partialord_le"]
     fn le(&self, other: &Rhs) -> bool {
         matches!(self.partial_cmp(other), Some(Less | Equal))
     }
@@ -1210,7 +1210,7 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     #[inline]
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_partialord_gt")]
+    #[rustc_diagnostic_item = "cmp_partialord_gt"]
     fn gt(&self, other: &Rhs) -> bool {
         matches!(self.partial_cmp(other), Some(Greater))
     }
@@ -1228,7 +1228,7 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     #[inline]
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(not(bootstrap), rustc_diagnostic_item = "cmp_partialord_ge")]
+    #[rustc_diagnostic_item = "cmp_partialord_ge"]
     fn ge(&self, other: &Rhs) -> bool {
         matches!(self.partial_cmp(other), Some(Greater | Equal))
     }
@@ -1558,14 +1558,7 @@ mod impls {
             impl PartialOrd for $t {
                 #[inline]
                 fn partial_cmp(&self, other: &$t) -> Option<Ordering> {
-                    #[cfg(bootstrap)]
-                    {
-                        Some(self.cmp(other))
-                    }
-                    #[cfg(not(bootstrap))]
-                    {
-                        Some(crate::intrinsics::three_way_compare(*self, *other))
-                    }
+                    Some(crate::intrinsics::three_way_compare(*self, *other))
                 }
                 #[inline(always)]
                 fn lt(&self, other: &$t) -> bool { (*self) < (*other) }
@@ -1581,18 +1574,7 @@ mod impls {
             impl Ord for $t {
                 #[inline]
                 fn cmp(&self, other: &$t) -> Ordering {
-                    #[cfg(bootstrap)]
-                    {
-                        // The order here is important to generate more optimal assembly.
-                        // See <https://github.com/rust-lang/rust/issues/63758> for more info.
-                        if *self < *other { Less }
-                        else if *self == *other { Equal }
-                        else { Greater }
-                    }
-                    #[cfg(not(bootstrap))]
-                    {
-                        crate::intrinsics::three_way_compare(*self, *other)
-                    }
+                    crate::intrinsics::three_way_compare(*self, *other)
                 }
             }
         )*)

library/core/src/default.rs

@@ -178,9 +178,7 @@ default_impl! { i32, 0, "Returns the default value of `0`" }
 default_impl! { i64, 0, "Returns the default value of `0`" }
 default_impl! { i128, 0, "Returns the default value of `0`" }
 
-#[cfg(not(bootstrap))]
 default_impl! { f16, 0.0f16, "Returns the default value of `0.0`" }
 default_impl! { f32, 0.0f32, "Returns the default value of `0.0`" }
 default_impl! { f64, 0.0f64, "Returns the default value of `0.0`" }
-#[cfg(not(bootstrap))]
 default_impl! { f128, 0.0f128, "Returns the default value of `0.0`" }

library/core/src/future/mod.rs

@@ -12,7 +12,6 @@
 use crate::ptr::NonNull;
 use crate::task::Context;
 
-#[cfg(not(bootstrap))]
 mod async_drop;
 mod future;
 mod into_future;
@@ -38,7 +37,6 @@ pub use ready::{ready, Ready};
 #[stable(feature = "future_poll_fn", since = "1.64.0")]
 pub use poll_fn::{poll_fn, PollFn};
 
-#[cfg(not(bootstrap))]
 #[unstable(feature = "async_drop", issue = "none")]
 pub use async_drop::{async_drop, async_drop_in_place, AsyncDrop, AsyncDropInPlace};