Auto merge of #117435 - SparrowLii:nightly_parallel, r=oli-obk,davidtwco
enable parallel rustc front end in nightly builds Refers to the [MCP](https://github.com/rust-lang/compiler-team/issues/681), this pr does: 1. Enable the parallel front end in nightly builds, and keep the default number of threads as 1. Then users can use the parallel rustc front end via -Z threads=n option. 2. Set it up to serial front end for beta/stable builds via bootstrap. 3. Switch over the alt builders from parallel rustc to serial, so we have artifacts without parallel to test against the artifacts with parallel. r? `@oli-obk` cc `@cjgillot` `@nnethercote` `@bjorn3` `@Kobzol`
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commit
f9b644636f
9 changed files with 41 additions and 13 deletions
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@ -138,7 +138,6 @@ cfg_match! {
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[std::sync::atomic::AtomicUsize]
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[std::sync::atomic::AtomicU8]
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[std::sync::atomic::AtomicU32]
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[std::sync::atomic::AtomicU64]
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[std::backtrace::Backtrace]
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[std::io::Error]
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[std::fs::File]
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@ -148,6 +147,18 @@ cfg_match! {
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[crate::owned_slice::OwnedSlice]
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);
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// PowerPC and MIPS platforms with 32-bit pointers do not
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// have AtomicU64 type.
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#[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
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already_sync!(
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[std::sync::atomic::AtomicU64]
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);
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#[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
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already_sync!(
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[portable_atomic::AtomicU64]
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);
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macro_rules! impl_dyn_sync {
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($($($attr: meta)* [$ty: ty where $($generics2: tt)*])*) => {
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$(unsafe impl<$($generics2)*> DynSync for $ty {})*
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@ -265,7 +265,15 @@ cfg_match! {
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pub use std::sync::OnceLock;
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pub use std::sync::atomic::{AtomicBool, AtomicUsize, AtomicU32, AtomicU64};
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pub use std::sync::atomic::{AtomicBool, AtomicUsize, AtomicU32};
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// PowerPC and MIPS platforms with 32-bit pointers do not
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// have AtomicU64 type.
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#[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
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pub use std::sync::atomic::AtomicU64;
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#[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
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pub use portable_atomic::AtomicU64;
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pub use std::sync::Arc as Lrc;
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pub use std::sync::Weak as Weak;
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