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Use place instead of symbol [In Progress] #35

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@roxelo roxelo commented Dec 3, 2020

Modifies closure_kind_origins such that Place is used instead of Symbol to describe which variable influenced the decision of selecting a specific closure kind (FnMut, FnOnce, Fn)

Remainging work: Figure out why for 4 of the tests, some stderr info are missing.

Closes rust-lang/project-rfc-2229/issues/21


This change is Reviewable

jyn514 and others added 30 commits November 24, 2020 14:10
- Only run for `QPath::Resolved` with `Some` self parameter (`<X as Y>::T`)
- Fall back to the previous behavior if the path can't be resolved
- Show what the behavior is if the type can't be normalized
- Run `resolve_vars_if_possible`

  It's not clear whether or not this is necessary. See
  rust-lang#77616 for more context.

- Add a test for cross-crate re-exports
- Use the same code for both `hir::Ty` and `Ty`
This uses the same `with_param_env` pattern that late lints use.
Thanks to all the doctree refactors, this was very easy to add.
* `rustc` should now compile under LLVM 9 or 10
* Compiler generates an error if `-Z instrument-coverage` is specified
  but LLVM version is less than 11
* Coverage tests that require `-Z instrument-coverage` and run codegen
  should be skipped if LLVM version is less than 11
rustc_ast currently has a few dependencies on rustc_lexer. Ideally, an AST
would not have any dependency its lexer, for minimizing unnecessarily
design-time dependencies. Breaking this dependency would also have practical
benefits, since modifying rustc_lexer would not trigger a rebuild of rustc_ast.

This commit does not remove the rustc_ast --> rustc_lexer dependency,
but it does remove one of the sources of this dependency, which is the
code that handles fuzzy matching between symbol names for making suggestions
in diagnostics. Since that code depends only on Symbol, it is easy to move
it to rustc_span. It might even be best to move it to a separate crate,
since other tools such as Cargo use the same algorithm, and have simply
contain a duplicate of the code.

This changes the signature of find_best_match_for_name so that it is no
longer generic over its input. I checked the optimized binaries, and this
function was duplicated at nearly every call site, because most call sites
used short-lived iterator chains, generic over Map and such. But there's
no good reason for a function like this to be generic, since all it does
is immediately convert the generic input (the Iterator impl) to a concrete
Vec<Symbol>. This has all of the costs of generics (duplicated method bodies)
with no benefit.

Changing find_best_match_for_name to be non-generic removed about 10KB of
code from the optimized binary. I know it's a drop in the bucket, but we have
to start reducing binary size, and beginning to tame over-use of generics
is part of that.
Co-authored-by: Wesley Wiser <wwiser@gmail.com>
… r=oli-obk

Rename `optin_builtin_traits` to `auto_traits`

They were originally called "opt-in, built-in traits" (OIBITs), but
people realized that the name was too confusing and a mouthful, and so
they were renamed to just "auto traits". The feature flag's name wasn't
updated, though, so that's what this PR does.

There are some other spots in the compiler that still refer to OIBITs,
but I don't think changing those now is worth it since they are internal
and not particularly relevant to this PR.

Also see <https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/opt-in.2C.20built-in.20traits.20(auto.20traits).20feature.20name>.

r? `@oli-obk` (feel free to re-assign if you're not the right reviewer for this)
When using the unstable `--persist-doctests` option,
Windows path separators were not escaped properly. Also when running
the command in a workspace, crate files can overwrite each other.

Before: `src\lib_rs_1_0\rust_out`
After: `\crate_a_src_lib_rs_1_0\rust_out`, `\crate_b_src_lib_rs_1_0\rust_out`
…ents in AssocTyConstraints haven't been fully implemented
The sublist was being rendered as a code block because it was indented 4
spaces.
A list was being rendered all on one line and there were other
formatting issues as well.
The angle brackets were confusing my IDE and I thought they were unnecessary. I was wrong.
Fixes rust-lang#79152

This code was already set up to handle indexing an array. However, it
appears that we never end up with an inference variable for the slice
case, so the missing call to `resolve_vars_if_possible` had no effect
until now.
bors and others added 29 commits December 1, 2020 02:45
…jyn514

More intra doc links

Helps with rust-lang#75080.

I did a commit by group of file, I can squash if wanted.

`@rustbot` modify labels: T-doc, A-intra-doc-links

r? `@jyn514`
…gnueabi-target, r=petrochenkov

Add built-in support for the armv5te-unknown-linux-uclibcgnueabi target

Hi!

I'd like to add built-in support for the `armv5te-unknown-linux-uclibcgnueabi` target. It's a pretty common target used by many devices like routers and IP cameras. It's mostly a copy-paste of `armv5te-unknown-linux-gnueabi`. I've tested it on a quite complex application that uses tokio, openssl and a lot of other stuff and everything seems to be working fine.

I'm not sure about the `post_link_args` but the point is that my linker fails when `-ldl` isn't specified. Maybe there is a better place where to put this option...

It's my first contribution to Rust itself, so feel free to wash my head 😄

_Note: The app mentioned above was built with this in my `.cargo/config`:_
```
[unstable]
build-std = ["core", "std", "alloc", "proc_macro", "panic_abort"]
build-std-features = ["panic_immediate_abort"]
```
Remove extra call to upvar_tys

We already visit the tuple of upvar_tys, we don't need to visit each individual type.

Fixes rust-lang#78720

r? `@ghost`
…d-ux, r=jyn514

Make keyboard interactions in the settings menu more pleasant

rust-lang#78868 improved the keyboard interactions with the settings page. This PR goes a bit further by allowing more than just "space" to toggle the checkboxes.

r? `@jyn514`
Change ui test that are run-pass and that do not test the compiler to library tests

Part of rust-lang#76268, these are some of the relevant ui tests I found that can be replaced by library tests.

Note: this PR just moves the tests, I have not checked for any overlap between these tests and existing library tests. The only test I changed is `env_home_dir`, where I added code to restore the old home dir after testing.

All moved tests:

| ui test | library test file | test |
| --- | --- | --- |
| `const\ascii_ctype.rs` | `core\tests\ascii.rs` | `ascii_ctype_const` |
| `const\const-str-ptr.rs` | `alloc\tests\str.rs` | `const_str_ptr` |
| `assert-eq-trailing-comma.rs` | `core\tests\macros.rs` | `assert_eq_trailing_comma` |
| `assert-escape.rs` | `core\tests\macros.rs` | `assert_escape` |
| `assert-ne-trailing-comma.rs` | `core\tests\macros.rs` | `assert_ne_trailing_comma` |
| `atomic-access-bool.rs` | `core\tests\atomic.rs` | `atomic_access_bool` |
| `atomic-alignment.rs` | `core\tests\atomic.rs` | `atomic_alignment` |
| `atomic-compare_exchange.rs` | `core\tests\atomic.rs` | `atomic_compare_exchange` |
| ~~`atomic-print.rs`~~ | ~~`std\tests\process.rs`~~ | ~~`atomic_print`~~ |
| `bool.rs` | `core\tests\bool.rs` | `test_bool` |
| `bool_not.rs` | `core\tests\bool.rs` | `test_bool_not` |
| `char_unicode.rs` | `core\tests\unicode.rs` | `version` |
| `cmp-default.rs` | `core\tests\cmp.rs` | `cmp_default` |
| `deref-mut-on-ref.rs` | `core\tests\ops.rs` | `deref_mut_on_ref` |
| `deref-on-ref.rs` | `core\tests\ops.rs` | `deref_on_ref` |
| `env-home-dir.rs` | `std\tests\env.rs` | `env_home_dir` |
| ~~`env-vars.rs`~~ | ~~`std\tests\env.rs`~~ | ~~`env_vars`~~ |
| `extend-for-unit.rs` | `core\tests\iter.rs` | `extend_for_unit` |
| `offset_from.rs` | `core\tests\ptr.rs` | `offset_from` |
| `option-ext.rs` | `core\tests\option.rs` | `option_ext` |
| `result-opt-conversions.rs` | `core\tests\result.rs` | `result_opt_conversions` |
| `sleep.rs` | `std\tests\thread.rs` | `sleep` |
| ~~`try-wait.rs`~~ | ~~`std\tests\process.rs`~~ | ~~`try_wait`~~ |
| `utf8.rs` | `alloc\tests\str.rs` | `utf8` |
| `utf8_chars.rs` | `alloc\tests\str.rs` | `utf8_chars` |
| `wrapping-int-api.rs` | `core\tests\num\wrapping.rs` | `wrapping_int_api` |
…nd_str_type_name, r=varkor

Stop adding '*' at the end of slice and str typenames for MSVC case

When computing debug info for MSVC debuggers, Rust compiler emits C++ style type names for compatibility with .natvis visualizers. All Ref types are treated as equivalences of C++ pointers in this process, and, as a result, their type names end with a '\*'. Since Slice and Str are treated as Ref by the compiler, their type names also end with a '\*'. This causes the .natvis engine for WinDbg fails to display data of Slice and Str objects. We addressed this problem simply by removing the '*' at the end of type names for Slice and Str types.

Debug info in WinDbg before the fix:
![image](https://user-images.githubusercontent.com/74681961/99594120-9a4dcf80-29a7-11eb-8cce-aedaf1da6d21.png)

Debug info in WinDbg after the fix:
![image](https://user-images.githubusercontent.com/74681961/99597173-717c0900-29ac-11eb-861e-98143a9177cf.png)

This change has also been tested with debuggers for Visual Studio, VS Code C++ and VS Code LLDB to make sure that it does not affect the behavior of other kinds of debugger.
…-core, r=jyn514

Remove const_fn_feature_flags test

## Overview

Helps with rust-lang#76268

I found `const_fn_feature_flags` is targeting feature-gate and remove it.

r? ``@matklad``
Move const ip in ui test to unit test

Helps with rust-lang#76268

r? ``@matklad``
…imulacrum

Validate lint docs separately.

This addresses some concerns raised in rust-lang#76549 (comment) about errors with the lint docs being confusing and cumbersome. Errors from validating the lint documentation were being generated during `x.py doc` (and `x.py dist`), since extraction and validation are being done in a single step. This changes it so that extraction and validation are separated, so that `x.py doc` will not error if there is a validation problem, and tests are moved to `x.py test src/tools/lint-docs`.

This includes the following changes:

* Separate validation to `x.py test`.
* Added some more documentation on how to more easily modify and test the docs.
* Added more help to the error messages to hopefully provide more information on how to fix things.

The first commit just moves the code around, so you may consider looking at the other commits for a smaller diff.
…illaumeGomez

Add -Z normalize-docs and enable it for compiler docs

Works around rust-lang#79459 by only enabling normalization for the compiler itself (and anyone who opts-in on nightly). Eventually I want to remove this and enable normalization by default, but that's turned out to be [really hard](https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/How.20do.20I.20normalize.20projection.20types.20to.20a.20single.20type.3F/near/218125195).

This uses a command line option instead of a feature gate so it's easier to pass it to all crates at once. Theoretically it's better to use a feature gate instead so that it's easier for people to use on docs.rs, but I'm also not terribly concerned with how easy it to use a temporary hack.

Addresses rust-lang#77459.
Move intra-doc link tests into a subdirectory

They were starting to get unwieldy.

r? ``@Manishearth``
Show since when a function is const in stdlib

Fixes rust-lang#76998

This makes it so that functions with the `#[rustc_const_stable()]` attribute now show from what version they were stably declared const, alongside what version they were declared stable. Example from `Result`:
![image](https://user-images.githubusercontent.com/13342132/100561194-1be60d00-3286-11eb-99ff-1e81201218a9.png)

r? ``@jyn514``
update Miri

This update includes rust-lang/miri#1617, the data race detector by ``@JCTyblaidd.`` :)

Cc ``@rust-lang/miri`` r? ``@ghost``
Update with status for various NetBSD ports.

The NetBSD ports of rust to aarch64, armv7*, i686, and powerpc**
all both build and run.  Status is as of rust 1.47.0.

*) Natively requires repeated successive build attempts (`rustc` is
   such a resource pig VM-consumption-wise), or run in a chroot
   on an aarch64 host where the available VM space is 4GB instead
   of the native 2GB.
**) Powerpc either requires `-latomic` in a directory searched by
   default by `ld` or to be built within pkgsrc which has a patch and
   support package to tackle this issue.
Update books

## nomicon

1 commits in 23c49f1d5ce4720bc5b7e3a920f47eccc8da6b63..d8383b65f7948c2ca19191b3b4bd709b403aaf45
2020-11-05 13:30:53 +0900 to 2020-11-22 10:24:42 -0500
- Clarify that any alignment is valid for ZSTs

## reference

5 commits in a7de763c213292f5b44bf10acb87ffa38724814d..a8afdca5d0715b2257b6f8b9a032fd4dd7dae855
2020-11-11 19:13:21 -0800 to 2020-11-30 06:44:46 -0800
- Describe relationship between reference and optimizers (rust-lang/reference#902)
- A simple missing space (rust-lang/reference#909)
- Cleanup formatting (rust-lang/reference#907)
- Use `doc`, not `test` for fn item inner attr example (rust-lang/reference#906)
- Update where our chat is. (rust-lang/reference#903)

## book

1 commits in 13e1c05420bca86ecc79e4ba5b6d02de9bd53c62..a190438d77d28041f24da4f6592e287fab073a61
2020-10-20 14:57:32 -0500 to 2020-11-16 10:44:08 -0600
- Change SipHash not found (404) link to SipHash in Wikipedia (rust-lang/book#2503)

## rust-by-example

4 commits in 1886fda6981b723e4de637074455558f8bc1e83c..236c734a2cb323541b3394f98682cb981b9ec086
2020-10-28 13:46:54 -0500 to 2020-11-30 14:05:49 -0300
- Update old invalid link (rust-lang/rust-by-example#1392)
- Moved "See also" link to the correct page. (rust-lang/rust-by-example#1389)
- Fix some markdown lint warnings (rust-lang/rust-by-example#1388)
- Minor grammar suggestion (rust-lang/rust-by-example#1386)

## embedded-book

1 commits in ca8169e69b479f615855d0eece7e318138fcfc00..ba34b8a968f9531d38c4dc4411d5568b7c076bfe
2020-10-15 15:06:35 +0000 to 2020-11-17 00:20:43 +0000
- Clarify CAS availability  (rust-embedded/book#273)
Rollup of 11 pull requests

Successful merges:

 - rust-lang#79038 (Change ui test that are run-pass and that do not test the compiler to library tests)
 - rust-lang#79184 (Stop adding '*' at the end of slice and str typenames for MSVC case)
 - rust-lang#79227 (Remove const_fn_feature_flags test)
 - rust-lang#79444 (Move const ip in ui test to unit test)
 - rust-lang#79522 (Validate lint docs separately.)
 - rust-lang#79525 (Add -Z normalize-docs and enable it for compiler docs)
 - rust-lang#79527 (Move intra-doc link tests into a subdirectory)
 - rust-lang#79548 (Show since when a function is const in stdlib)
 - rust-lang#79568 (update Miri)
 - rust-lang#79573 (Update with status for various NetBSD ports.)
 - rust-lang#79583 (Update books)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
UDS can be a sendfile destination, just like TCP sockets.
…, r=pnkfelix

Implement lazy decoding of DefPathTable during incremental compilation

PR rust-lang#75813 implemented lazy decoding of the `DefPathTable` from crate metadata. However, it requires decoding the entire `DefPathTable` when incremental compilation is active, so that we can map a decoded `DefPathHash` to a `DefId` from an arbitrary crate.

This PR adds support for lazy decoding of dependency `DefPathTable`s when incremental compilation si active.

When we load the incremental cache and dep
graph, we need the ability to map a `DefPathHash` to a `DefId` in the
current compilation session (if the corresponding definition still
exists).

This is accomplished by storing the old `DefId` (that is, the `DefId`
from the previous compilation session) for each `DefPathHash` we need to
remap. Since a `DefPathHash` includes the owning crate, the old crate is
guaranteed to be the right one (if the definition still exists). We then
use the old `DefIndex` as an initial guess, which we validate by
comparing the expected and actual `DefPathHash`es. In most cases,
foreign crates will be completely unchanged, which means that we our
guess will be correct. If our guess is wrong, we fall back to decoding
the entire `DefPathTable` for the foreign crate. This still represents
an improvement over the status quo, since we can skip decoding the
entire `DefPathTable` for other crates (where all of our guesses were
correct).
Add wasm32 support to inline asm

There is some contention around inline asm and wasm, and I really only made this to figure out the process of hacking on rustc, but I figured as long as the code existed, it was worth uploading.

cc `@Amanieu`
Warn if `dsymutil` returns an error code

This checks the error code returned by `dsymutil` and warns if it failed. It
also provides the stdout and stderr logs from `dsymutil`, similar to the native
linker step.

I tried to think of ways to test this change, but so far I haven't found a good way, as you'd likely need to inject some nonsensical args into `dsymutil` to induce failure, which feels too artificial to me. Also, rust-lang#79361 suggests Rust is on the verge of disabling `dsymutil` by default, so perhaps it's okay for this change to be untested. In any case, I'm happy to add a test if someone sees a good approach.

Fixes rust-lang#78770
…r=oli-obk

Improve attribute message error spans

I got the idea while working on rust-lang#79464
…m-ou-se

std::io: Use sendfile for UnixStream

`UnixStream` was forgotten in rust-lang#75272 .

Benchmark yields the following results.
Before:
`running 1 test
test sys::unix::kernel_copy::tests::bench_file_to_uds_copy        ... bench:      54,399 ns/iter (+/- 6,817) = 2409 MB/s`

After:
`running 1 test
test sys::unix::kernel_copy::tests::bench_file_to_uds_copy        ... bench:      18,627 ns/iter (+/- 6,007) = 7036 MB/s`
…laumeGomez

Rollup of 3 pull requests

Successful merges:

 - rust-lang#79508 (Warn if `dsymutil` returns an error code)
 - rust-lang#79509 (Improve attribute message error spans)
 - rust-lang#79600 (std::io: Use sendfile for UnixStream)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@roxelo roxelo closed this Dec 3, 2020
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Update TypeckResuts::closure_kind_origin to use Place