Commit graph

133468 commits

Author SHA1 Message Date
Thom Chiovoloni 55d7f736d8 Tighten the bounds on atomic Ordering in std::sys::unix::weak 2020-11-13 19:15:51 -08:00
Camille GILLOT 41c44b498f Move Steal to rustc_data_structures. 2020-11-14 01:30:56 +01:00
Tomasz Miąsko 6903273339 Lower intrinsics calls: forget, size_of, unreachable, wrapping_*
This allows constant propagation to evaluate `size_of` and `wrapping_*`,
and unreachable propagation to propagate a call to `unreachable`.

The lowering is performed as a MIR optimization, rather than during MIR
building to preserve the special status of intrinsics with respect to
unsafety checks and promotion.
2020-11-14 00:00:00 +00:00
bors b63d05a908 Auto merge of #78683 - Nemo157:issue-78673, r=lcnr
Check predicates from blanket trait impls while testing if they apply

fixes #78673
2020-11-13 23:12:01 +00:00
The8472 bbfa92c82d Always handle EOVERFLOW by falling back to the generic copy loop
Previously EOVERFLOW handling was only applied for io::copy specialization
but not for fs::copy sharing the same code.

Additionally we lower the chunk size to 1GB since we have a user report
that older kernels may return EINVAL when passing 0x8000_0000
but smaller values succeed.
2020-11-13 22:38:27 +01:00
The8472 4854d418a5 do direct splice syscall and probe availability to get android builds to work
Android builds use feature level 14, the libc wrapper for splice is gated
on feature level 21+ so we have to invoke the syscall directly.
Additionally the emulator doesn't seem to support it so we also have to
add ENOSYS checks.
2020-11-13 22:38:27 +01:00
The8472 3dfc377aa1 move sendfile/splice/copy_file_range into kernel_copy module 2020-11-13 22:38:27 +01:00
The8472 888b1031bc limit visibility of copy offload helpers to sys::unix module 2020-11-13 22:38:27 +01:00
The8472 18bfe2a66b move copy specialization tests to their own module 2020-11-13 22:38:27 +01:00
The8472 7f5d2722af move copy specialization into sys::unix module 2020-11-13 22:38:23 +01:00
Vadim Petrochenkov ac4c1f58b9 rustc_resolve: Make macro_rules scope chain compression lazy 2020-11-14 00:35:56 +03:00
Aman Arora c50e57f946 Log closure as well 2020-11-13 16:10:12 -05:00
Camelid 7eb1a1afcf Validate that locals have a corresponding LocalDecl 2020-11-13 12:54:42 -08:00
bors 74f7e32f43 Auto merge of #78888 - richkadel:llvm-coverage-tests, r=tmandry
Fix and re-enable two coverage tests on MacOS

Note, in the coverage-reports test, the comment about MacOS was wrong.
The setting is based on config.toml llvm `optimize` setting. There
doesn't appear to be any environment variable I can check, and I
don't think we should add one. Testing the binary itself is a more
reliable way to check anyway.

For the coverage-spanview test, I removed the dependency on sed
altogether, which is much less ugly than trying to work around the
MacOS sed differences.

I tested these changes on Linux, Windows, and Mac.

r? `@tmandry`
FYI `@wesleywiser`
2020-11-13 20:06:46 +00:00
The8472 ad9b07c7e5 add benchmarks 2020-11-13 19:46:37 +01:00
The8472 46e7fbe60b reduce syscalls by inferring FD types based on source struct instead of calling stat()
also adds handling for edge-cases involving large sparse files where sendfile could fail with EOVERFLOW
2020-11-13 19:46:35 +01:00
The8472 0624730d9e add forwarding specializations for &mut variants
`impl Write for &mut T where T: Write`, thus the same should
apply to the specialization traits
2020-11-13 19:45:38 +01:00
The8472 cd3bddc044 prioritize sendfile over splice since it results in fewer context switches when sending to pipes
splice returns to userspace when the pipe is full, sendfile
just blocks until it's done, this can achieve much higher throughput
2020-11-13 19:45:38 +01:00
The8472 67a6059aa5 move tests module into separate file 2020-11-13 19:45:38 +01:00
The8472 5eb88fa5c7 hide unused exports on other platforms 2020-11-13 19:45:38 +01:00
The8472 16236470c1 specialize io::copy to use copy_file_range, splice or sendfile
Currently it only applies to linux systems. It can be extended to make use
of similar syscalls on other unix systems.
2020-11-13 19:45:27 +01:00
Matt Brubeck bf6902ca61 Add BTreeMap::retain and BTreeSet::retain 2020-11-13 10:23:50 -08:00
Bastian Kauschke 06c9c599ed lessen restriction in check_kind_count 2020-11-13 19:12:49 +01:00
C 75dfc711da refactor: vec_deque ignore-tidy-filelength
commit c547d5fabcd756515afa7263ee5304965bb4c497
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 11:22:23 2020 +0000

    test: updating ui/hygiene/panic-location.rs expected

commit 2af03769c4ffdbbbad75197a1ad0df8c599186be
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 10:43:30 2020 +0000

    fix: documentation unresolved link

commit c4b0df361ce27d7392d8016229f2e0265af32086
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:58:31 2020 +0000

    style: compiling with Rust's style guidelines

commit bdd2de5f3c09b49a18e3293f2457fcab25557c96
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:56:31 2020 +0000

    refactor: removing ignore-tidy-filelength

commit fcc4b3bc41f57244c65ebb8e4efe4cbc9460b5a9
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:51:35 2020 +0000

    refactor: moving trait RingSlices to ring_slices.rs

commit 2f0cc539c06d8841baf7f675168f68ca7c21e68e
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:46:09 2020 +0000

    refactor: moving struct PairSlices to pair_slices.rs

commit a55d3ef1dab4c3d85962b3a601ff8d1f7497faf2
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:31:45 2020 +0000

    refactor: moving struct Iter to iter.rs

commit 76ab33a12442a03726f36f606b4e0fe70f8f246b
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:24:32 2020 +0000

    refactor: moving struct IntoIter into into_iter.rs

commit abe0d9eea2933881858c3b1bc09df67cedc5ada5
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 02:19:07 2020 +0000

    refactor: moving struct IterMut into iter_mut.rs

commit 70ebd6420335e1895e2afa2763a0148897963e24
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 01:49:15 2020 +0000

    refactor: moved macros into macros.rs

commit b08dd2add994b04ae851aa065800bd8bd6326134
Author: C <DeveloperC@protonmail.com>
Date:   Sat Oct 31 01:05:36 2020 +0000

    refactor: moving vec_deque.rs to vec_deque/mod.rs
2020-11-13 17:56:39 +00:00
Bastian Kauschke 49c0b318df tbh what 2020-11-13 18:56:39 +01:00
bors 89bce3e908 Auto merge of #79011 - ehuss:update-cargo, r=ehuss
Update cargo

Fixing an important publish bug.

2 commits in 8662ab427a8d6ad8047811cc4d78dbd20dd07699..2af662e22177a839763ac8fb70d245a680b15214
2020-11-12 03:47:53 +0000 to 2020-11-12 19:04:56 +0000
- Fix publishing with optional dependencies. (rust-lang/cargo#8853)
- Minor typo in features.md (rust-lang/cargo#8851)
2020-11-13 17:35:56 +00:00
Rich Kadel b4b0ef3e4b Addressed feedback 2020-11-13 09:07:39 -08:00
bors f2a11a2537 Auto merge of #79017 - GuillaumeGomez:rollup-5orhudd, r=GuillaumeGomez
Rollup of 6 pull requests

Successful merges:

 - #77151 (Add regression test for issue #76042)
 - #77996 (Doc change: Remove mention of `fnv` in HashMap)
 - #78463 (Add type to `ConstKind::Placeholder`)
 - #78984 (Rustdoc check option)
 - #78985 (add dropck test for const params)
 - #78996 (add explicit test for const param promotion)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2020-11-13 14:53:55 +00:00
Bastian Kauschke 894b1f7d3d extract closures into a separate trait 2020-11-13 15:49:17 +01:00
Guillaume Gomez 7ea8e32adb
Rollup merge of #78996 - lcnr:cg-promotion, r=RalfJung
add explicit test for const param promotion

r? `@RalfJung`
2020-11-13 15:26:20 +01:00
Guillaume Gomez 22cc878d89
Rollup merge of #78985 - lcnr:cg-drop-test, r=nikomatsakis
add dropck test for const params

r? `@nikomatsakis` or `@varkor`
2020-11-13 15:26:18 +01:00
Guillaume Gomez 804ca1d5b7
Rollup merge of #78984 - GuillaumeGomez:rustdoc-check-option, r=jyn514
Rustdoc check option

The ultimate goal behind this option would be to have `rustdoc --check` being run when you use `cargo check` as a second step.

r? `@jyn514`
2020-11-13 15:26:16 +01:00
Guillaume Gomez 0b7a7930b4
Rollup merge of #78463 - varkor:placeholder-const, r=nikomatsakis
Add type to `ConstKind::Placeholder`

I simply threaded `<'tcx>` through everything that required it. I'm not sure whether this is the correct thing to do, but it seems to work.

r? `@nikomatsakis`
2020-11-13 15:26:14 +01:00
Guillaume Gomez ef32ef7baf
Rollup merge of #77996 - tkaitchuck:master, r=m-ou-se
Doc change: Remove mention of `fnv` in HashMap

Disclaimer: I am the author of [aHash](https://github.com/tkaitchuck/aHash).

This changes the Rustdoc in `HashMap` from mentioning the `fnv` crate to mentioning the `aHash` crate, as an alternative `Hasher` implementation.

### Why

Fnv [has poor hash quality](https://github.com/rurban/smhasher), is [slow for larger keys](https://github.com/tkaitchuck/aHash/blob/master/compare/readme.md#speed), and does not provide dos resistance, because it is unkeyed (this can also cause [other problems](https://accidentallyquadratic.tumblr.com/post/153545455987/rust-hash-iteration-reinsertion)).

Fnv has acceptable performance for integers and has very poor performance with keys >32 bytes. This is the reason it was removed from the standard library in https://github.com/rust-lang/rust/pull/37229 .

Because regardless of which dimension you value, there are better alternatives, it does not make sense for anyone to consider using `fnv`.

The text mentioning `fnv` in the standard library continues to create confusion: https://github.com/rust-lang/hashbrown/issues/153  https://github.com/rust-lang/hashbrown/issues/9 . There are also a number of [crates using it](https://crates.io/crates/fnv/reverse_dependencies) a great many of which are hashing strings (Which is when Fnv is the [worst](https://github.com/cbreeden/fxhash#benchmarks), [possible](https://github.com/tkaitchuck/aHash#speed), [choice](http://cglab.ca/~abeinges/blah/hash-rs/).)

I think aHash makes the most sense to mention as an alternative because it is the most credible option (in my obviously biased opinion). It offers [good performance on numbers and strings](https://github.com/tkaitchuck/aHash/blob/master/compare/readme.md#speed), is [of high quality](https://github.com/tkaitchuck/aHash#hash-quality), and [provides dos resistance](https://github.com/tkaitchuck/aHash/wiki/How-aHash-is-resists-DOS-attacks). It is popular (see [stats](https://crates.io/crates/ahash)) and is the default hasher for [hashbrown](https://crates.io/crates/hashbrown) and [dashmap](https://crates.io/crates/dashmap) which are the most popular alternative hashmaps. Finally it does not have any of the [`gotcha` cases](https://github.com/tkaitchuck/aHash#fxhash) that `FxHash` suffers from. (Which is the other popular hashing option when DOS attacks are not a concern)

Signed-off-by: Tom Kaitchuck <tom.kaitchuck@emc.com>
2020-11-13 15:26:10 +01:00
Guillaume Gomez c5a11ddec9
Rollup merge of #77151 - rust-lang:LeSeulArtichaut-patch-1, r=pnkfelix
Add regression test for issue #76042

Originally posted in https://github.com/rust-lang/rust/issues/76042#issuecomment-683272710.
r? `@pnkfelix`
2020-11-13 15:26:06 +01:00
Alexis Bourget 309d863e37 Fix wrong XPath 2020-11-13 14:58:21 +01:00
bors a1f7ca788d Auto merge of #77990 - bugadani:copies, r=lcnr
Eliminate some temporary vectors

This PR changes `get_item_attrs` and `get_item_variances` to return iterator impls instead of vectors. On top of that, this PR replaces some seemingly unnecessary vectors with iterators or SmallVec, and also reserves space where we know (the minimum) number of elements that will be inserted. This change hopes to remove a few heap allocations and unnecessary copies.
2020-11-13 11:49:33 +00:00
Vishnunarayan K I f026d0fcf8 update clippy test ouput 2020-11-13 17:11:13 +05:30
Dániel Buga f0d0d87a20 Push to result vector instead of allocating
Co-authored-by: lcnr <bastian_kauschke@hotmail.de>
2020-11-13 11:19:25 +01:00
Dániel Buga 45faeb43ae Reuse vector 2020-11-13 11:19:25 +01:00
Dániel Buga a7f2bb6343 Reserve space in advance 2020-11-13 11:19:25 +01:00
Dániel Buga 2ca0b85593 Allocate less in lower_block_noalloc 2020-11-13 11:19:25 +01:00
Dániel Buga 660d8a6550 Eliminate some temporary vectors & Remove unnecessary mark_attr_used 2020-11-13 11:19:23 +01:00
bors 2c4df6bb34 Auto merge of #79014 - pietroalbini:1.50, r=pietroalbini
Bump version number to 1.50.0

First PR of the release process of Rust 1.48.0. All PRs landed after this one will be included in Rust 1.50.0.

r? `@ghost`
cc `@rust-lang/release`
2020-11-13 09:07:29 +00:00
Pietro Albini 2306e6277c
bump version to 1.50.0 2020-11-13 09:47:16 +01:00
bors a38f8fb674 Auto merge of #78826 - petrochenkov:mrscopes2, r=eddyb
resolve: Collapse `macro_rules` scope chains on the fly

Otherwise they grow too long and you have to endlessly walk through them when resolving macros or imports.
Addresses https://rust-lang.zulipchat.com/#narrow/stream/247081-t-compiler.2Fperformance/topic/Slow.20Builtin.20Derives/near/215750815
2020-11-13 05:40:37 +00:00
J. Ryan Stinnett bd0fba207b Clean up outdated use_once_payload pretty printer comment
While reading some parts of the pretty printer code, I noticed this old comment
which seemed out of place. The `use_once_payload` this outdated comment mentions
was removed in 2017 in 40f03a1e0d, so this
completes the work by removing the comment.
2020-11-13 05:34:03 +00:00
Tom Kaitchuck 4e5848349c
Update library/std/src/collections/hash/map.rs
Co-authored-by: Mara Bos <m-ou.se@m-ou.se>
2020-11-12 20:14:57 -08:00
Eric Huss a830720098 Update cargo 2020-11-12 18:39:16 -08:00
bors f036a8f3be Auto merge of #78990 - RalfJung:miri, r=RalfJung
update Miri

Fixes https://github.com/rust-lang/rust/issues/78937
Cc `@rust-lang/miri` r? `@ghost`
2020-11-13 02:04:53 +00:00