Update library subtree to 2024-08-07

library/Cargo.toml

@@ -0,0 +1,44 @@
+[workspace]
+resolver = "1"
+members = [
+  "std",
+  "sysroot",
+]
+
+exclude = [
+  # stdarch has its own Cargo workspace
+  "stdarch",
+]
+
+[profile.release.package.compiler_builtins]
+# For compiler-builtins we always use a high number of codegen units.
+# The goal here is to place every single intrinsic into its own object
+# file to avoid symbol clashes with the system libgcc if possible. Note
+# that this number doesn't actually produce this many object files, we
+# just don't create more than this number of object files.
+#
+# It's a bit of a bummer that we have to pass this here, unfortunately.
+# Ideally this would be specified through an env var to Cargo so Cargo
+# knows how many CGUs are for this specific crate, but for now
+# per-crate configuration isn't specifiable in the environment.
+codegen-units = 10000
+
+# These dependencies of the standard library implement symbolication for
+# backtraces on most platforms. Their debuginfo causes both linking to be slower
+# (more data to chew through) and binaries to be larger without really all that
+# much benefit. This section turns them all to down to have no debuginfo which
+# helps to improve link times a little bit.
+[profile.release.package]
+addr2line.debug = 0
+adler.debug = 0
+gimli.debug = 0
+miniz_oxide.debug = 0
+object.debug = 0
+rustc-demangle.debug = 0
+
+[patch.crates-io]
+# See comments in `library/rustc-std-workspace-core/README.md` for what's going on
+# here
+rustc-std-workspace-core = { path = 'rustc-std-workspace-core' }
+rustc-std-workspace-alloc = { path = 'rustc-std-workspace-alloc' }
+rustc-std-workspace-std = { path = 'rustc-std-workspace-std' }

library/alloc/Cargo.toml

@@ -10,7 +10,10 @@ edition = "2021"
 
 [dependencies]
 core = { path = "../core" }
-compiler_builtins = { version = "0.1.40", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "0.1.114", features = ['rustc-dep-of-std'] }
+
+[target.'cfg(not(any(target_arch = "aarch64", target_arch = "x86", target_arch = "x86_64")))'.dependencies]
+compiler_builtins = { version = "0.1.114", features = ["no-f16-f128"] }
 
 [dev-dependencies]
 rand = { version = "0.8.5", default-features = false, features = ["alloc"] }
@@ -38,8 +41,8 @@ harness = false
 compiler-builtins-mem = ['compiler_builtins/mem']
 compiler-builtins-c = ["compiler_builtins/c"]
 compiler-builtins-no-asm = ["compiler_builtins/no-asm"]
+compiler-builtins-no-f16-f128 = ["compiler_builtins/no-f16-f128"]
 compiler-builtins-mangled-names = ["compiler_builtins/mangled-names"]
-compiler-builtins-weak-intrinsics = ["compiler_builtins/weak-intrinsics"]
 # Make panics and failed asserts immediately abort without formatting any message
 panic_immediate_abort = ["core/panic_immediate_abort"]
 # Choose algorithms that are optimized for binary size instead of runtime performance

library/alloc/benches/btree/map.rs

@@ -1,7 +1,8 @@
 use std::collections::BTreeMap;
 use std::ops::RangeBounds;
 
-use rand::{seq::SliceRandom, Rng};
+use rand::seq::SliceRandom;
+use rand::Rng;
 use test::{black_box, Bencher};
 
 macro_rules! map_insert_rand_bench {

library/alloc/benches/linked_list.rs

@@ -1,4 +1,5 @@
 use std::collections::LinkedList;
+
 use test::Bencher;
 
 #[bench]

library/alloc/benches/string.rs

@@ -1,4 +1,5 @@
 use std::iter::repeat;
+
 use test::{black_box, Bencher};
 
 #[bench]

library/alloc/benches/vec.rs

@@ -1,5 +1,6 @@
-use rand::RngCore;
 use std::iter::repeat;
+
+use rand::RngCore;
 use test::{black_box, Bencher};
 
 #[bench]

library/alloc/benches/vec_deque.rs

@@ -1,7 +1,6 @@
-use std::{
-    collections::{vec_deque, VecDeque},
-    mem,
-};
+use std::collections::{vec_deque, VecDeque};
+use std::mem;
+
 use test::{black_box, Bencher};
 
 #[bench]

library/alloc/benches/vec_deque_append.rs

@@ -1,4 +1,5 @@
-use std::{collections::VecDeque, time::Instant};
+use std::collections::VecDeque;
+use std::time::Instant;
 
 const VECDEQUE_LEN: i32 = 100000;
 const WARMUP_N: usize = 100;

library/alloc/src/alloc.rs

@@ -2,16 +2,14 @@
 
 #![stable(feature = "alloc_module", since = "1.28.0")]
 
+#[stable(feature = "alloc_module", since = "1.28.0")]
+#[doc(inline)]
+pub use core::alloc::*;
 #[cfg(not(test))]
 use core::hint;
-
 #[cfg(not(test))]
 use core::ptr::{self, NonNull};
 
-#[stable(feature = "alloc_module", since = "1.28.0")]
-#[doc(inline)]
-pub use core::alloc::*;
-
 #[cfg(test)]
 mod tests;
 
@@ -57,7 +55,7 @@ pub struct Global;
 #[cfg(test)]
 pub use std::alloc::Global;
 
-/// Allocate memory with the global allocator.
+/// Allocates memory with the global allocator.
 ///
 /// This function forwards calls to the [`GlobalAlloc::alloc`] method
 /// of the allocator registered with the `#[global_allocator]` attribute
@@ -101,7 +99,7 @@ pub unsafe fn alloc(layout: Layout) -> *mut u8 {
     }
 }
 
-/// Deallocate memory with the global allocator.
+/// Deallocates memory with the global allocator.
 ///
 /// This function forwards calls to the [`GlobalAlloc::dealloc`] method
 /// of the allocator registered with the `#[global_allocator]` attribute
@@ -119,7 +117,7 @@ pub unsafe fn dealloc(ptr: *mut u8, layout: Layout) {
     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
 }
 
-/// Reallocate memory with the global allocator.
+/// Reallocates memory with the global allocator.
 ///
 /// This function forwards calls to the [`GlobalAlloc::realloc`] method
 /// of the allocator registered with the `#[global_allocator]` attribute
@@ -138,7 +136,7 @@ pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8
     unsafe { __rust_realloc(ptr, layout.size(), layout.align(), new_size) }
 }
 
-/// Allocate zero-initialized memory with the global allocator.
+/// Allocates zero-initialized memory with the global allocator.
 ///
 /// This function forwards calls to the [`GlobalAlloc::alloc_zeroed`] method
 /// of the allocator registered with the `#[global_allocator]` attribute
@@ -345,7 +343,7 @@ extern "Rust" {
     fn __rust_alloc_error_handler(size: usize, align: usize) -> !;
 }
 
-/// Signal a memory allocation error.
+/// Signals a memory allocation error.
 ///
 /// Callers of memory allocation APIs wishing to cease execution
 /// in response to an allocation error are encouraged to call this function,

library/alloc/src/alloc/tests.rs

@@ -1,9 +1,10 @@
 use super::*;
 
 extern crate test;
-use crate::boxed::Box;
 use test::Bencher;
 
+use crate::boxed::Box;
+
 #[test]
 fn allocate_zeroed() {
     unsafe {

library/alloc/src/borrow.rs

@@ -2,21 +2,20 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use core::borrow::{Borrow, BorrowMut};
 use core::cmp::Ordering;
 use core::hash::{Hash, Hasher};
 #[cfg(not(no_global_oom_handling))]
 use core::ops::{Add, AddAssign};
 use core::ops::{Deref, DerefPure};
 
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use core::borrow::{Borrow, BorrowMut};
+use Cow::*;
 
 use crate::fmt;
 #[cfg(not(no_global_oom_handling))]
 use crate::string::String;
 
-use Cow::*;
-
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, B: ?Sized> Borrow<B> for Cow<'a, B>
 where