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Author SHA1 Message Date
Nadrieril
1fab669f8d Be honest about being able to list constructors 
The test change is because we used to treat `&str` like other `&T`s, ie
as having a single constructor. That's not quite true though since we
consider `&str` constants as atomic instead of refs to `str` constants.
 2020-10-27 03:09:55 +00:00
Nadrieril
db9a8480c4 Simplify specialize_constructor 
Also removes the ugly caching that was introduced in #76918. It was
bolted on without deeper knowledge of the workings of the algorithm.
This commit manages to be more performant without any of the complexity.
It should be better on representative workloads too.
 2020-10-27 03:08:38 +00:00
Nathan Whitaker
39941e6281 Fix bootstrap doctest failure 2020-10-26 22:09:47 -04:00
bors
28f03ac4c0 Auto merge of #78421 - JohnTitor:rollup-bq2d7fo, r=JohnTitor 
Rollup of 16 pull requests

Successful merges:

 - #76635 (Add [T]::as_chunks(_mut))
 - #77703 (add system-llvm-libunwind config option)
 - #78219 (Prefer to use `print_def_path`)
 - #78298 (Add test for bad NLL higher-ranked subtype)
 - #78332 (Update description for error E0308)
 - #78342 (Use check-pass in single-use-lifetime ui tests)
 - #78347 (Add lexicographical comparison doc)
 - #78348 (Make some functions private that don't have to be public)
 - #78349 (Use its own `TypeckResults` to avoid ICE)
 - #78375 (Use ? in core/std macros)
 - #78377 (Fix typo in debug statement)
 - #78388 (Add some regression tests)
 - #78394 (fix(docs): typo in BufWriter documentation)
 - #78396 (Add compiler support for LLVM's x86_64 ERMSB feature)
 - #78405 (Fix typo in lint description)
 - #78412 (Improve formatting of hash collections docs)

Failed merges:

r? `@ghost`
 2020-10-27 01:36:12 +00:00
Nadrieril
54fa70290d Unify the paths through is_useful 2020-10-27 00:49:32 +00:00
Nadrieril
c96bd28ab3 Recompute MissingConstructors when needed 
This only happens in a slow (diagnostics) path, so the code clarity gain
is worth it.
 2020-10-27 00:46:33 +00:00
Nadrieril
b49f90760d Pass more things through PatCtxt 
This is even a perf improvement on the match-heavy benchmarks.
 2020-10-27 00:46:33 +00:00
Nadrieril
cdafd1e1bd Let MissingConstructors handle the subtleties of missing constructors 2020-10-27 00:46:32 +00:00
Nadrieril
1190e7275c Cache head constructor in PatStack 
Since the constructor is recomputed a lot, caching is worth it.
 2020-10-27 00:46:32 +00:00
Nadrieril
833089fbc9 Unify the two kinds of specialization by adding a Wildcard ctor 2020-10-27 00:46:32 +00:00
Nadrieril
41e7ca499d Inline specialize_one_pattern 2020-10-27 00:46:32 +00:00
Nadrieril
c511955a9f Factor out the two specialization steps 2020-10-27 00:46:32 +00:00
Nadrieril
6ad9f44a50 Clarify specialization into two steps 
First is checking for constructor overlap, second is extracting the
resulting fields.
 2020-10-27 00:46:32 +00:00
Nadrieril
7c4f94be48 Use pat_constructor to simplify specialize_one_pattern 2020-10-27 00:46:32 +00:00
Nadrieril
feb1e13960 Split split_grouped_constructor into smaller functions 2020-10-27 00:46:32 +00:00
Yuki Okushi
4236d27c9b
Rollup merge of #78412 - camelid:cleanup-hash-docs, r=jonas-schievink 
Improve formatting of hash collections docs
 2020-10-27 08:45:30 +09:00
Yuki Okushi
7824d9abbd
Rollup merge of #78405 - notriddle:patch-3, r=lcnr 
Fix typo in lint description
 2020-10-27 08:45:27 +09:00
Yuki Okushi
46b8e46fe1
Rollup merge of #78396 - josephlr:ermsb, r=petrochenkov 
Add compiler support for LLVM's x86_64 ERMSB feature

This change is needed for compiler-builtins to check for this feature
when implementing memcpy/memset. See:
  https://github.com/rust-lang/compiler-builtins/pull/365

Without this change, the following code compiles, but does nothing:
```rust
#[cfg(target_feature = "ermsb")]
pub unsafe fn ermsb_memcpy() { ... }
```

The change just does compile-time detection. I think that runtime
detection will have to come in a follow-up CL to std-detect.

Like all the CPU feature flags, this just references #44839

Signed-off-by: Joe Richey <joerichey@google.com>
 2020-10-27 08:45:24 +09:00
Yuki Okushi
f6f8764b25
Rollup merge of #78394 - rubik:master, r=m-ou-se 
fix(docs): typo in BufWriter documentation

This PR fixes a small typo in the BufWriter documentation. The current documentation looks like this:

![2020-10-26-111501_438x83_scrot](https://user-images.githubusercontent.com/238549/97160357-83d3a000-177c-11eb-8a35-3cdd3a7d89de.png)

The `<u8>` at the end is mangled by Markdown. This PR makes the `BufWriter` documentation like the `BufReader` one:

https://github.com/rust-lang/rust/blob/master/library/std/src/io/buffered/bufreader.rs#L16

I'm tagging Steve as per the Rustc dev guide.

r? @steveklabnik
 2020-10-27 08:45:20 +09:00
Yuki Okushi
98e2a9564f
Rollup merge of #78388 - camelid:regression-tests, r=lcnr 
Add some regression tests

Closes #75763.
Closes #76179.
 2020-10-27 08:45:17 +09:00
Yuki Okushi
b72d70ef61
Rollup merge of #78377 - LeSeulArtichaut:patch-docs, r=jonas-schievink 
Fix typo in debug statement
 2020-10-27 08:45:14 +09:00
Yuki Okushi
5a33fa5179
Rollup merge of #78375 - taiki-e:question-in-macros, r=kennytm 
Use ? in core/std macros
 2020-10-27 08:45:10 +09:00
Yuki Okushi
6abd2a59e7
Rollup merge of #78349 - JohnTitor:issue-75962, r=davidtwco 
Use its own `TypeckResults` to avoid ICE

Fixes #75962
 2020-10-27 08:45:07 +09:00
Yuki Okushi
ae5442582d
Rollup merge of #78348 - jyn514:pub-crate, r=GuillaumeGomez 
Make some functions private that don't have to be public

r? @GuillaumeGomez
 2020-10-27 08:45:04 +09:00
Yuki Okushi
727e93dc74
Rollup merge of #78347 - Rustin-Liu:rustin-patch-doc, r=kennytm 
Add lexicographical comparison doc

close https://github.com/rust-lang/rust/issues/72255
 2020-10-27 08:45:01 +09:00
Yuki Okushi
afdd148c03
Rollup merge of #78342 - oliviacrain:checkmate-pass, r=Mark-Simulacrum 
Use check-pass in single-use-lifetime ui tests

Rationale: the `single_use_lifetimes` lint is used during late name resolution, which is within the scope of `check-pass` and does not require codegen or linking.

Helps remove some FIXMES associated with #62277. Additionally tidies touched test files.
 2020-10-27 08:44:57 +09:00
Yuki Okushi
0b72ca6ea6
Rollup merge of #78332 - PoignardAzur:doc_E0308, r=camelid 
Update description for error E0308

Fixes #76462

r? @camelid
 2020-10-27 08:44:54 +09:00
Yuki Okushi
9d7db4891b
Rollup merge of #78298 - Aaron1011:fix/nll-ranked-test, r=Mark-Simulacrum 
Add test for bad NLL higher-ranked subtype

Fixes #57642
 2020-10-27 08:44:51 +09:00
Yuki Okushi
f3c94374b9
Rollup merge of #78219 - JohnTitor:print-def-path, r=estebank 
Prefer to use `print_def_path`

Follow-up of https://github.com/rust-lang/rust/pull/71310#discussion_r415438577
 2020-10-27 08:44:47 +09:00
Yuki Okushi
2c307fab49
Rollup merge of #77703 - Keruspe:system-libunwind, r=Mark-Simulacrum 
add system-llvm-libunwind config option

allows using the system-wide llvm-libunwind as the unwinder

Workaround for #76020
 2020-10-27 08:44:44 +09:00
Yuki Okushi
13e88d6366
Rollup merge of #76635 - scottmcm:slice-as-chunks, r=LukasKalbertodt 
Add [T]::as_chunks(_mut)

Allows getting the slices directly, rather than just through an iterator as in `array_chunks(_mut)`.  The constructors for those iterators are then written in terms of these methods, so the iterator constructors no longer have any `unsafe` of their own.

Unstable, of course. #74985
 2020-10-27 08:44:41 +09:00
bors
a4d30a7b49 Auto merge of #77876 - tmiasko:simplify-locals, r=wesleywiser 
Remove unused set-discriminant statements and assignments regardless of rvalue

* Represent use counts with u32
* Unify use count visitors
* Change RemoveStatements visitor into a function
* Remove unused set-discriminant statements
* Use exhaustive match to clarify what is being optimized
* Remove unused assignments regardless of rvalue kind
 2020-10-26 23:22:39 +00:00
Nathan Whitaker
cb8b9012db Address review comments 2020-10-26 19:19:06 -04:00
Anthony Ramine
056942215c Implement -Z function-sections=yes|no 
This lets rustc users tweak whether all functions should be put in their own
TEXT section, using whatever default value the target defines if the flag
is missing.
 2020-10-26 23:26:43 +01:00
Nathan Whitaker
6ba127d3f0 Fix doctest 2020-10-26 18:19:49 -04:00
Nathan Whitaker
5ac1688f4b Remove lint from clippy 2020-10-26 18:19:48 -04:00
Nathan Whitaker
576eb2a30c Write docs for lint / fix review nit 2020-10-26 18:19:48 -04:00
Nathan Whitaker
1bcd2452fe Address review comments 2020-10-26 18:19:48 -04:00
Nathan Whitaker
737bfeffd2 Change to warn by default / fix typo 2020-10-26 18:19:48 -04:00
Nathan Whitaker
5643a0662a Tweak diagnostic 2020-10-26 18:19:47 -04:00
Nathan Whitaker
ce95122e95 Update doctest 2020-10-26 18:19:47 -04:00
Nathan Whitaker
8b65df06ce Address review comments 2020-10-26 18:19:47 -04:00
Nathan Whitaker
a2f4afe0f6 Add basic test 2020-10-26 18:19:46 -04:00
Nathan Whitaker
8cf1b0e1ad Uplift temporary-cstring-as-ptr into rustc 2020-10-26 18:19:40 -04:00
varkor
ac1454001c Suggest expressions that look like const generic arguments should be enclosed in brackets 
Co-Authored-By: Esteban Kuber <github@kuber.com.ar>
 2020-10-26 21:54:45 +00:00
Sergio Benitez
7c4fe00213 Ignore threaded capture tests on WASM w/o threads 2020-10-26 14:35:38 -07:00
bors
fd542592f0 Auto merge of #77187 - TimDiekmann:box-alloc, r=Amanieu 
Support custom allocators in `Box`

r? `@Amanieu`

This pull request requires a crater run.

### Prior work:
- #71873
- #58457
- [`alloc-wg`](https://github.com/TimDiekmann/alloc-wg)-crate

Currently blocked on:
- ~#77118~
- ~https://github.com/rust-lang/chalk/issues/615 (#77515)~
 2020-10-26 21:16:33 +00:00
Camelid
59f108885e Improve formatting of hash collections docs 2020-10-26 14:05:06 -07:00
Camelid
4641d2e6aa
Add FIXME note to const generics test 
Co-authored-by: lcnr <bastian_kauschke@hotmail.de>
 2020-10-26 13:56:31 -07:00
Camelid
94ed9455e8 Add some regression tests 2020-10-26 13:55:37 -07:00