Auto merge of #127305 - jhpratt:rollup-3p5wf3h, r=jhpratt

Rollup of 5 pull requests

Successful merges:

 - #126792 (wasm64 build with target-feature=+simd128,+atomics)
 - #127195 (Remove unqualified form import of io::Error in process_vxworks.rs and fallback on remove_dir_impl for vxworks)
 - #127287 (jsondocck: Use correct index for error message.)
 - #127289 (rustdoc-json: Better representation of lifetime bounds in where clauses.)
 - #127303 (chore: remove repeat words)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Diff for: library/core/src/hint.rs

@@ -189,7 +189,7 @@ pub const unsafe fn unreachable_unchecked() -> ! {
 /// ```
 ///
 /// This example is quite unlike anything that would be used in the real world: it is redundant
-/// to put an an assertion right next to code that checks the same thing, and dereferencing a
+/// to put an assertion right next to code that checks the same thing, and dereferencing a
 /// pointer already has the builtin assumption that it is nonnull. However, it illustrates the
 /// kind of changes the optimizer can make even when the behavior is less obviously related.
 #[track_caller]

Diff for: library/core/src/slice/sort/stable/drift.rs

@@ -200,7 +200,7 @@ fn logical_merge<T, F: FnMut(&T, &T) -> bool>(
     // If one or both of the runs are sorted do a physical merge, using
     // quicksort to sort the unsorted run if present. We also *need* to
     // physically merge if the combined runs would not fit in the scratch space
-    // anymore (as this would mean we are no longer able to to quicksort them).
+    // anymore (as this would mean we are no longer able to quicksort them).
     let len = v.len();
     let can_fit_in_scratch = len <= scratch.len();
     if !can_fit_in_scratch || left.sorted() || right.sorted() {

Diff for: library/portable-simd/crates/core_simd/src/swizzle_dyn.rs

@@ -30,6 +30,8 @@ where
         use core::arch::arm::{uint8x8_t, vtbl1_u8};
         #[cfg(target_arch = "wasm32")]
         use core::arch::wasm32 as wasm;
+        #[cfg(target_arch = "wasm64")]
+        use core::arch::wasm64 as wasm;
         #[cfg(target_arch = "x86")]
         use core::arch::x86;
         #[cfg(target_arch = "x86_64")]

Diff for: library/std/src/lib.rs

@@ -266,6 +266,7 @@
 )]
 #![cfg_attr(any(windows, target_os = "uefi"), feature(round_char_boundary))]
 #![cfg_attr(target_family = "wasm", feature(stdarch_wasm_atomic_wait))]
+#![cfg_attr(target_arch = "wasm64", feature(simd_wasm64))]
 #![cfg_attr(
     all(any(target_arch = "x86_64", target_arch = "x86"), target_os = "uefi"),
     feature(stdarch_x86_has_cpuid)

Diff for: library/std/src/sys/pal/unix/fs.rs

@@ -1976,13 +1976,14 @@ pub fn chroot(dir: &Path) -> io::Result<()> {
 
 pub use remove_dir_impl::remove_dir_all;
 
-// Fallback for REDOX, ESP-ID, Horizon, Vita and Miri
+// Fallback for REDOX, ESP-ID, Horizon, Vita, Vxworks and Miri
 #[cfg(any(
     target_os = "redox",
     target_os = "espidf",
     target_os = "horizon",
     target_os = "vita",
     target_os = "nto",
+    target_os = "vxworks",
     miri
 ))]
 mod remove_dir_impl {
@@ -1996,6 +1997,7 @@ mod remove_dir_impl {
     target_os = "horizon",
     target_os = "vita",
     target_os = "nto",
+    target_os = "vxworks",
     miri
 )))]
 mod remove_dir_impl {

Diff for: library/std/src/sys/pal/unix/process/process_vxworks.rs

@@ -1,5 +1,5 @@
 use crate::fmt;
-use crate::io::{self, Error, ErrorKind};
+use crate::io::{self, ErrorKind};
 use crate::num::NonZero;
 use crate::sys;
 use crate::sys::cvt;

Diff for: library/std/src/sys/pal/wasm/atomics/futex.rs

@@ -1,4 +1,8 @@
-use crate::arch::wasm32;
+#[cfg(target_arch = "wasm32")]
+use core::arch::wasm32 as wasm;
+#[cfg(target_arch = "wasm64")]
+use core::arch::wasm64 as wasm;
+
 use crate::sync::atomic::AtomicU32;
 use crate::time::Duration;
 
@@ -10,11 +14,8 @@ use crate::time::Duration;
 pub fn futex_wait(futex: &AtomicU32, expected: u32, timeout: Option<Duration>) -> bool {
     let timeout = timeout.and_then(|t| t.as_nanos().try_into().ok()).unwrap_or(-1);
     unsafe {
-        wasm32::memory_atomic_wait32(
-            futex as *const AtomicU32 as *mut i32,
-            expected as i32,
-            timeout,
-        ) < 2
+        wasm::memory_atomic_wait32(futex as *const AtomicU32 as *mut i32, expected as i32, timeout)
+            < 2
     }
 }
 
@@ -23,12 +24,12 @@ pub fn futex_wait(futex: &AtomicU32, expected: u32, timeout: Option<Duration>) -
 /// Returns true if this actually woke up such a thread,
 /// or false if no thread was waiting on this futex.
 pub fn futex_wake(futex: &AtomicU32) -> bool {
-    unsafe { wasm32::memory_atomic_notify(futex as *const AtomicU32 as *mut i32, 1) > 0 }
+    unsafe { wasm::memory_atomic_notify(futex as *const AtomicU32 as *mut i32, 1) > 0 }
 }
 
 /// Wake up all threads that are waiting on futex_wait on this futex.
 pub fn futex_wake_all(futex: &AtomicU32) {
     unsafe {
-        wasm32::memory_atomic_notify(futex as *const AtomicU32 as *mut i32, i32::MAX as u32);
+        wasm::memory_atomic_notify(futex as *const AtomicU32 as *mut i32, i32::MAX as u32);
     }
 }

Diff for: library/std/src/sys/pal/wasm/atomics/thread.rs

@@ -19,7 +19,11 @@ impl Thread {
     pub fn set_name(_name: &CStr) {}
 
     pub fn sleep(dur: Duration) {
-        use crate::arch::wasm32;
+        #[cfg(target_arch = "wasm32")]
+        use core::arch::wasm32 as wasm;
+        #[cfg(target_arch = "wasm64")]
+        use core::arch::wasm64 as wasm;
+
         use crate::cmp;
 
         // Use an atomic wait to block the current thread artificially with a
@@ -31,7 +35,7 @@ impl Thread {
         while nanos > 0 {
             let amt = cmp::min(i64::MAX as u128, nanos);
             let mut x = 0;
-            let val = unsafe { wasm32::memory_atomic_wait32(&mut x, 0, amt as i64) };
+            let val = unsafe { wasm::memory_atomic_wait32(&mut x, 0, amt as i64) };
             debug_assert_eq!(val, 2);
             nanos -= amt;
         }

Diff for: src/librustdoc/clean/types.rs

@@ -1286,7 +1286,7 @@ impl GenericBound {
     }
 }
 
-#[derive(Clone, PartialEq, Eq, Debug, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
 pub(crate) struct Lifetime(pub Symbol);
 
 impl Lifetime {

Diff for: src/librustdoc/json/conversions.rs

@@ -10,6 +10,7 @@ use rustc_ast::ast;
 use rustc_attr::DeprecatedSince;
 use rustc_hir::{def::CtorKind, def::DefKind, def_id::DefId};
 use rustc_metadata::rendered_const;
+use rustc_middle::bug;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::symbol::sym;
 use rustc_span::{Pos, Symbol};
@@ -512,9 +513,15 @@ impl FromWithTcx<clean::WherePredicate> for WherePredicate {
                     })
                     .collect(),
             },
-            RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
+            RegionPredicate { lifetime, bounds } => WherePredicate::LifetimePredicate {
                 lifetime: convert_lifetime(lifetime),
-                bounds: bounds.into_tcx(tcx),
+                outlives: bounds
+                    .iter()
+                    .map(|bound| match bound {
+                        clean::GenericBound::Outlives(lt) => convert_lifetime(*lt),
+                        _ => bug!("found non-outlives-bound on lifetime predicate"),
+                    })
+                    .collect(),
             },
             EqPredicate { lhs, rhs } => {
                 WherePredicate::EqPredicate { lhs: lhs.into_tcx(tcx), rhs: rhs.into_tcx(tcx) }

Diff for: src/rustdoc-json-types/lib.rs

@@ -8,7 +8,7 @@ use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
 /// rustdoc format-version.
-pub const FORMAT_VERSION: u32 = 30;
+pub const FORMAT_VERSION: u32 = 31;
 
 /// A `Crate` is the root of the emitted JSON blob. It contains all type/documentation information
 /// about the language items in the local crate, as well as info about external items to allow
@@ -511,9 +511,9 @@ pub enum WherePredicate {
         /// ```
         generic_params: Vec<GenericParamDef>,
     },
-    RegionPredicate {
+    LifetimePredicate {
         lifetime: String,
-        bounds: Vec<GenericBound>,
+        outlives: Vec<String>,
     },
     EqPredicate {
         lhs: Type,

Diff for: src/tools/jsondocck/src/main.rs

@@ -56,6 +56,8 @@ pub enum CommandKind {
 
 impl CommandKind {
     fn validate(&self, args: &[String], lineno: usize) -> bool {
+        // FIXME(adotinthevoid): We should "parse, don't validate" here, so we avoid ad-hoc
+        // indexing in check_command.
         let count = match self {
             CommandKind::Has => (1..=2).contains(&args.len()),
             CommandKind::IsMany => args.len() >= 2,
@@ -71,7 +73,7 @@ impl CommandKind {
         if let CommandKind::Count = self {
             if args[1].parse::<usize>().is_err() {
                 print_err(
-                    &format!("Second argument to @count must be a valid usize (got `{}`)", args[2]),
+                    &format!("Second argument to @count must be a valid usize (got `{}`)", args[1]),
                     lineno,
                 );
                 return false;

Diff for: src/tools/jsondoclint/src/validator.rs

@@ -374,8 +374,8 @@ impl<'a> Validator<'a> {
                 bounds.iter().for_each(|b| self.check_generic_bound(b));
                 generic_params.iter().for_each(|gpd| self.check_generic_param_def(gpd));
             }
-            WherePredicate::RegionPredicate { lifetime: _, bounds } => {
-                bounds.iter().for_each(|b| self.check_generic_bound(b));
+            WherePredicate::LifetimePredicate { lifetime: _, outlives: _ } => {
+                // nop, all strings.
             }
             WherePredicate::EqPredicate { lhs, rhs } => {
                 self.check_type(lhs);

Diff for: tests/rustdoc-json/lifetime/outlives_in_param.rs

@@ -0,0 +1,8 @@
+// ignore-tidy-linelength
+
+// @count '$.index[*][?(@.name=="outlives")].inner.function.generics.params[*]' 2
+// @is    '$.index[*][?(@.name=="outlives")].inner.function.generics.params[0].name' \"\'a\"
+// @is    '$.index[*][?(@.name=="outlives")].inner.function.generics.params[0].kind.lifetime.outlives' []
+// @is    '$.index[*][?(@.name=="outlives")].inner.function.generics.params[1].name' '"T"'
+// @is    '$.index[*][?(@.name=="outlives")].inner.function.generics.params[1].kind.type.bounds' '[{"outlives": "'\''a"}]'
+pub fn outlives<'a, T: 'a>() {}

Diff for: tests/rustdoc-json/lifetime/outlives_in_where.rs

@@ -0,0 +1,24 @@
+// ignore-tidy-linelength
+
+// @is '$.index[*][?(@.name=="on_lifetimes")].inner.function.generics.where_predicates' '[{"lifetime_predicate": {"lifetime": "'\''all", "outlives": ["'\''a", "'\''b", "'\''c"]}}]'
+pub fn on_lifetimes<'a, 'b, 'c, 'all>()
+where
+    'all: 'a + 'b + 'c,
+{
+}
+
+// @count '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[*]' 2
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[0].name' \"\'a\"
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[0].kind.lifetime.outlives' []
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[1].name' '"T"'
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[1].kind.type.bounds' []
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.params[1].kind.type.bounds' []
+// @count '$.index[*][?(@.name=="on_trait")].inner.function.generics.where_predicates[*]' 1
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.where_predicates[0].bound_predicate.type.generic' '"T"'
+// @count '$.index[*][?(@.name=="on_trait")].inner.function.generics.where_predicates[0].bound_predicate.bounds[*]' 1
+// @is    '$.index[*][?(@.name=="on_trait")].inner.function.generics.where_predicates[0].bound_predicate.bounds[0].outlives' \"\'a\"
+pub fn on_trait<'a, T>()
+where
+    T: 'a,
+{
+}