Bump stdarch submodule #83278

Amanieu · 2021-03-18T20:51:34Z

Major changes:

More AVX-512 intrinsics.
More ARM & AArch64 NEON intrinsics.
Updated unstable WASM intrinsics to latest draft standards.
Intrinsics that previously used #[rustc_args_required_const] now use const generics. See Use const generics for stdarch intrinsics #83167 for more details.
std_detect is now a separate crate instead of a submodule of std.

rust-highfive · 2021-03-18T20:51:37Z

r? @Mark-Simulacrum

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rust-highfive · 2021-03-18T20:51:38Z

⚠️ Warning ⚠️

These commits modify submodules.

Mark-Simulacrum · 2021-03-18T20:52:12Z

@bors try @rust-timer queue

rust-timer · 2021-03-18T20:52:14Z

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

bors · 2021-03-18T20:52:22Z

⌛ Trying commit 56246c9462f2833f77ca259cd88dd33882f5ff9e with merge 5910a977f10dc850a8529c3d43d1c919b75ce4ca...

Amanieu · 2021-03-18T20:52:43Z

src/stage0.txt

-date: 2021-02-14
-rustc: beta
+date: 2021-03-17
+rustc: nightly


We'll have to wait for the bootstrap compiler to be upgraded before we can actually merge this.

klensy · 2021-03-18T21:38:01Z

Cargo.lock

+version = 3
+


In last few cargo.lock updates this part wasn't exist, maybe it should be removed until some decision on cargo.lock format version for rustc?

bors · 2021-03-18T21:42:15Z

☀️ Try build successful - checks-actions
Build commit: 5910a977f10dc850a8529c3d43d1c919b75ce4ca (5910a977f10dc850a8529c3d43d1c919b75ce4ca)

rust-timer · 2021-03-18T21:42:17Z

Queued 5910a977f10dc850a8529c3d43d1c919b75ce4ca with parent 1705a7d, future comparison URL.

rust-timer · 2021-03-19T01:25:39Z

Finished benchmarking try commit (5910a977f10dc850a8529c3d43d1c919b75ce4ca): comparison url.

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. Please note that if the perf results are neutral, you should likely undo the rollup=never given below by specifying rollup- to bors.

Importantly, though, if the results of this run are non-neutral do not roll this PR up -- it will mask other regressions or improvements in the roll up.

@bors rollup=never
@rustbot label: +S-waiting-on-review -S-waiting-on-perf

Amanieu · 2021-03-19T15:59:42Z

Looking at the perf results, it seems that the regressions mostly affect very short benchmark programs, which indicates a small fixed cost. I think this might be because std now pulls in std_detect as a separate crate instead of having it built into std, but I'm not 100% sure.

tmiasko · 2021-03-19T16:14:03Z

On x86_64 there are now 47% more intrinsics (+1588 based on -Zdump-mir=all&PreCodegen, there is also similar increase in query counts).

Mark-Simulacrum · 2021-03-19T16:20:05Z

core's compiletime is way down though:

core	15.774	8.898	-43.6%

I suspect that this may be a minor hit for the smallest crate, but it looks like this adds 50-200ms to most crates, with higher % impact on the smaller crates as a result.

I'm inclined to say that this is overall an acceptable performance result.

Amanieu · 2021-03-25T20:31:52Z

Let's see if #[rustc_legacy_const_generics] works properly.

@craterbot check

craterbot · 2021-03-25T20:31:56Z

👌 Experiment pr-83278 created and queued.
🤖 Automatically detected try build 5910a977f10dc850a8529c3d43d1c919b75ce4ca
⚠️ Try build based on commit 1705a7d, but latest commit is 2ef230c120f5c6af800b3fb51b78b14ce01a8e63. Did you forget to make a new try build?
🔍 You can check out the queue and this experiment's details.

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jyn514 · 2021-04-02T07:34:13Z

Would it be possible in the meantime to bump stdarch to an earlier version, before rustc_legacy_const_generics was added, so I can get the changes from rust-lang/stdarch#1013 without waiting for crater? This is blocking #82539.

Amanieu · 2021-04-02T07:36:35Z

Sure, feel free to make a separate PR for that.

bors · 2021-05-08T14:43:11Z

📌 Commit ac7f5ee2fea9d9536a429509ab50860a7949b4d0 has been approved by Mark-Simulacrum

Mark-Simulacrum · 2021-05-08T14:44:07Z

Performance results are still a bit unfortunate, but I agree with my prior claim that they're overall good -- and likely not really new, just a matter of adding (yet more) to std and friends.

bors · 2021-05-08T14:56:11Z

⌛ Testing commit ac7f5ee2fea9d9536a429509ab50860a7949b4d0 with merge bce0ca13ed535e764d8e837871607c39d327a1b9...

bors · 2021-05-08T15:25:56Z

💔 Test failed - checks-actions

RalfJung · 2021-05-08T16:07:21Z

error: formatting may not be suitable for sub-register argument
  --> library/core/src/../../stdarch/crates/core_arch/src/x86/bt.rs:11:22
   |
11 |         "btl {b:e}, ({p})",
   |                      ^^^
12 |         "setc {r}",
13 |         p = in(reg) p,
   |                     - for this argument
   |
   = note: `-D asm-sub-register` implied by `-D warnings`
   = help: use the `e` modifier to have the register formatted as `eax`
   = help: or use the `r` modifier to keep the default formatting of `rax`

Amanieu · 2021-05-08T18:41:07Z

@bors r=Mark-Simulacrum

bors · 2021-05-08T18:41:08Z

📌 Commit bf8b15f has been approved by Mark-Simulacrum

bors · 2021-05-08T18:41:20Z

⌛ Testing commit bf8b15f with merge 881c1ac...

bors · 2021-05-08T21:10:15Z

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 881c1ac to master...

klensy · 2021-05-08T23:24:17Z

Actually, it looks better than previous run https://perf.rust-lang.org/compare.html?start=ff34b919075f35a1787659e9c448a34b06bab8de&end=881c1ac408d93bb7adaa3a51dabab9266e82eee8&stat=instructions%3Au

pnkfelix · 2021-05-11T15:29:13Z

visited for perf triage. There are regressions, but as noted in the immediately preceding comment, they were not as bad as anticipated. And also, we did continue to see the 2x win on compile-time for libcore.

Pkgsrc changes: * Bump bootstrap requirements to 1.53.0. * Adjust patches, adapt to upstream changes, adjust cargo checksums * If using an external llvm, require >= 10.0 Upsteream changes: Version 1.54.0 (2021-07-29) ============================ Language ----------------------- - [You can now use macros for values in built-in attribute macros.][83366] While a seemingly minor addition on its own, this enables a lot of powerful functionality when combined correctly. Most notably you can now include external documentation in your crate by writing the following. ```rust #![doc = include_str!("README.md")] ``` You can also use this to include auto-generated modules: ```rust #[path = concat!(env!("OUT_DIR"), "/generated.rs")] mod generated; ``` - [You can now cast between unsized slice types (and types which contain unsized slices) in `const fn`.][85078] - [You can now use multiple generic lifetimes with `impl Trait` where the lifetimes don't explicitly outlive another.][84701] In code this means that you can now have `impl Trait<'a, 'b>` where as before you could only have `impl Trait<'a, 'b> where 'b: 'a`. Compiler ----------------------- - [Rustc will now search for custom JSON targets in `/lib/rustlib/<target-triple>/target.json` where `/` is the "sysroot" directory.][83800] You can find your sysroot directory by running `rustc --print sysroot`. - [Added `wasm` as a `target_family` for WebAssembly platforms.][84072] - [You can now use `#[target_feature]` on safe functions when targeting WebAssembly platforms.][84988] - [Improved debugger output for enums on Windows MSVC platforms.][85292] - [Added tier 3\* support for `bpfel-unknown-none` and `bpfeb-unknown-none`.][79608] \* Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries ----------------------- - [`panic::panic_any` will now `#[track_caller]`.][85745] - [Added `OutOfMemory` as a variant of `io::ErrorKind`.][84744] - [ `proc_macro::Literal` now implements `FromStr`.][84717] - [The implementations of vendor intrinsics in core::arch have been significantly refactored.][83278] The main user-visible changes are a 50% reduction in the size of libcore.rlib and stricter validation of constant operands passed to intrinsics. The latter is technically a breaking change, but allows Rust to more closely match the C vendor intrinsics API. Stabilized APIs --------------- - [`BTreeMap::into_keys`] - [`BTreeMap::into_values`] - [`HashMap::into_keys`] - [`HashMap::into_values`] - [`arch::wasm32`] - [`VecDeque::binary_search`] - [`VecDeque::binary_search_by`] - [`VecDeque::binary_search_by_key`] - [`VecDeque::partition_point`] Cargo ----- - [Added the `--prune <spec>` option to `cargo-tree` to remove a package from the dependency graph.][cargo/9520] - [Added the `--depth` option to `cargo-tree` to print only to a certain depth in the tree ][cargo/9499] - [Added the `no-proc-macro` value to `cargo-tree --edges` to hide procedural macro dependencies.][cargo/9488] - [A new environment variable named `CARGO_TARGET_TMPDIR` is available.][cargo/9375] This variable points to a directory that integration tests and benches can use as a "scratchpad" for testing filesystem operations. Compatibility Notes ------------------- - [Mixing Option and Result via `?` is no longer permitted in closures for inferred types.][86831] - [Previously unsound code is no longer permitted where different constructors in branches could require different lifetimes.][85574] - As previously mentioned the [`std::arch` instrinsics now uses stricter const checking][83278] than before and may reject some previously accepted code. - [`i128` multiplication on Cortex M0+ platforms currently unconditionally causes overflow when compiled with `codegen-units = 1`.][86063] [85574]: rust-lang/rust#85574 [86831]: rust-lang/rust#86831 [86063]: rust-lang/rust#86063 [86831]: rust-lang/rust#86831 [79608]: rust-lang/rust#79608 [84988]: rust-lang/rust#84988 [84701]: rust-lang/rust#84701 [84072]: rust-lang/rust#84072 [85745]: rust-lang/rust#85745 [84744]: rust-lang/rust#84744 [85078]: rust-lang/rust#85078 [84717]: rust-lang/rust#84717 [83800]: rust-lang/rust#83800 [83366]: rust-lang/rust#83366 [83278]: rust-lang/rust#83278 [85292]: rust-lang/rust#85292 [cargo/9520]: rust-lang/cargo#9520 [cargo/9499]: rust-lang/cargo#9499 [cargo/9488]: rust-lang/cargo#9488 [cargo/9375]: rust-lang/cargo#9375 [`BTreeMap::into_keys`]: https://doc.rust-lang.org/std/collections/struct.BTreeMap.html#method.into_keys [`BTreeMap::into_values`]: https://doc.rust-lang.org/std/collections/struct.BTreeMap.html#method.into_values [`HashMap::into_keys`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.into_keys [`HashMap::into_values`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.into_values [`arch::wasm32`]: https://doc.rust-lang.org/core/arch/wasm32/index.html [`VecDeque::binary_search`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search [`VecDeque::binary_search_by`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search_by [`VecDeque::binary_search_by_key`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search_by_key [`VecDeque::partition_point`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.partition_point

rust-highfive assigned Mark-Simulacrum Mar 18, 2021

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Amanieu marked this pull request as draft March 18, 2021 20:52

rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Mar 18, 2021

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jyn514 mentioned this pull request Mar 24, 2021

Deprecate doc(include) #82539

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the8472 mentioned this pull request Mar 24, 2021

where available use AtomicU{64,128} instead of mutex for Instant backsliding protection #83093

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jyn514 mentioned this pull request Apr 2, 2021

Update stdarch submodule (to before it switched to const generics) #83776

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Bump stdarch submodule

bf8b15f

Amanieu force-pushed the bump_stdarch branch from ac7f5ee to bf8b15f Compare May 8, 2021 18:40

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 8, 2021

bors added the merged-by-bors This PR was explicitly merged by bors. label May 8, 2021

bors merged commit 881c1ac into rust-lang:master May 8, 2021

rustbot added this to the 1.54.0 milestone May 8, 2021

hkratz mentioned this pull request May 9, 2021

Add armv7 neon support rusticstuff/simdutf8#2

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apiraino mentioned this pull request May 11, 2021

Improve diagnostics of evaluation of constant value failed errors #85155

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Mark-Simulacrum mentioned this pull request May 13, 2021

stdarch - compile-time errors on invalid arguments #85264

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LeSeulArtichaut mentioned this pull request May 18, 2021

Regression on nightly in AVX2 byte shift intrinsics #85446

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steffahn mentioned this pull request Sep 12, 2021

stability break in rust 1.54: generic Self types are currently not permitted in anonymous constants #88888

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Bump stdarch submodule #83278

Bump stdarch submodule #83278

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Bump stdarch submodule #83278

Bump stdarch submodule #83278

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